feat(编辑能力): 支持拖拽时画布自动跟随

fix(编辑能力): 修复页外文字框拖拽
fix(编辑能力): 修复旋转后纵向滚动回弹
2026-10-30 01:27:26 +08:00 · 2026-10-29 17:26:46 +08:00 · 2026-10-29 16:59:05 +08:00 · 2026-10-29 16:44:01 +08:00 · 2026-10-29 16:37:35 +08:00 · 2026-10-29 16:25:24 +08:00
133 changed files with 18341 additions and 4833 deletions
@@ -1,5 +1,6 @@
 #!/bin/bash
 set -e
 export TZ=Asia/Shanghai
+export Version="$(git show -s --format='%ct-%H' HEAD)"
 GOOS=js GOARCH=wasm CGO_ENABLED=0 go build -o assets/webui/wasm/ofdgo.wasm -trimpath -ldflags "-s -w -buildid=" ./cmd/webui/wasm.go
-GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o main -trimpath -ldflags "-s -w -buildid=" ./cmd/webui/webui.go
+GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o main -trimpath -ldflags "-s -w -buildid= -X github.com/xiaoqidun/ofdgo/internal/build.Version=$Version" ./cmd/webui/webui.go
@@ -1,8 +1,9 @@
 .idea/
 .vscode/
 .devcontainer/
+releases/
 go.work
 go.work.sum
-assets/webui/wasm/ofdgo.wasm
 *.exe
-*.exe~
+*.exe~
+assets/webui/wasm/ofdgo.wasm
@@ -1,5 +1,5 @@
 # 基础镜像
-FROM alpine:3.24.2
+FROM alpine:3.24.3

 # 作者信息
 LABEL authors="肖其顿 (XIAO QI DUN)"
@@ -3,23 +3,28 @@

 # 主要能力
 - 文档处理：创建、读写、拆分、合并、压缩
- 渲染转换：矢量、位图、导入、导出、批量
- 文档安全：签名、签章、验签、加密、解密
- 电子发票：提取、创建、编辑、校验、同步
+- 文档阅读：搜索、缩放、旋转、双页、连续
+- 文档管理：新建、导入、切换、排序、删除
+- 版本管理：创建、改名、切换、另存、删除
 - 页面管理：添加、导入、复制、排序、删除
- 文字处理：插入、编辑、排版、搜索、提取
- 文字样式：选区、混排、装饰、阴影、底色
+- 文档编辑：选区、重排、事务、撤销、重做
+- 文字处理：插入、编辑、替换、排版、提取
+- 文字样式：混排、粗体、斜体、阴影、底色
 - 字体处理：匹配、内嵌、外置、子集、提取
 - 图片处理：插入、替换、缩放、裁剪、提取
 - 图形处理：绘制、变换、组合、对齐、分布
- 色彩管理：空间、配置、转换、渐变、透明
- 文档管理：添加、切换、改名、排序、删除
- 版本管理：创建、切换、改名、另存、删除
- 文档结构：目录、书签、模板、标引、扩展
- 资源管理：字体、图片、色彩、媒体、附件
+- 色彩管理：调色、渐变、图案、透明、转换
+- 文档结构：图层、模板、目录、书签、标引
+- 资源管理：导入、绑定、替换、提取、清理
 - 注解管理：批注、高亮、水印、印章、链接
- 动作管理：跳转、链接、附件、音频、视频
+- 交互动作：跳转、链接、附件、音频、视频
+- 电子发票：提取、创建、编辑、校验、同步
+- 文档安全：签名、签章、验签、加密、解密
 - 三维处理：解析、材质、纹理、动画、渲染
+- 页面渲染：矢量、位图、裁剪、蒙版、合成
+- 批量转换：选页、并行、进度、取消、打包
+- 打印输出：预览、双面、合印、小册、海报
+- 应用交互：标签、链接、关联、拖放、复用

 # 在线使用
 [OFDGo WebUI](https://ofdgo.aite.me/)，将OFDGo编译为WASM提供服务
@@ -61,7 +66,22 @@ go build -o ofdgo_webui.exe -trimpath -ldflags "-s -w -buildid=" ./cmd/webui/web
 ```

 # 原生桌面
+基于 [GUIGo](https://github.com/xiaoqidun/guigo) 实现，运行前需参照其说明安装系统依赖
+
 ```batch
+set CGO_ENABLED=0
+
+:: 构建Linux arm64（aarch64）
+set GOOS=linux
+set GOARCH=arm64
+go build -o ofdgo_linux_arm64 -trimpath -ldflags "-s -w -buildid=" ./cmd/webview
+
+:: 构建Linux amd64（x64/x86_64）
+set GOOS=linux
+set GOARCH=amd64
+go build -o ofdgo_linux_amd64 -trimpath -ldflags "-s -w -buildid=" ./cmd/webview
+
+:: 构建Windows amd64（x64/x86_64）
 set GOOS=windows
 set GOARCH=amd64
 go build -o ofdgo_windows_amd64.exe -trimpath -ldflags "-H windowsgui -s -w -buildid=" ./cmd/webview
@@ -18,10 +18,10 @@ import "embed"

 // FS WebUI嵌入静态文件
 //
-//go:embed index.html ofdgo.css ofdgo.ico ofdgo.js ofdgo.json ofdgo.png ofdgo.svg ofdgo_edit.js ofdgo_font.js ofdgo_host.js ofdgo_wasm.js ofdgo_work.js wasm_exec.js
+//go:embed index.html ofdgo.css ofdgo.ico ofdgo.js ofdgo.json ofdgo.png ofdgo.svg ofdgo_edit.js ofdgo_font.js ofdgo_host.js ofdgo_print.js ofdgo_util.js ofdgo_view.js ofdgo_wasm.js ofdgo_work.js wasm_exec.js
 var FS embed.FS

 // NativeFS WebView嵌入静态文件
 //
-//go:embed index.html ofdgo.css ofdgo.ico ofdgo.js ofdgo.json ofdgo.png ofdgo.svg ofdgo_edit.js ofdgo_font.js ofdgo_host.js
+//go:embed index.html ofdgo.css ofdgo.ico ofdgo.js ofdgo.json ofdgo.png ofdgo.svg ofdgo_edit.js ofdgo_font.js ofdgo_host.js ofdgo_print.js ofdgo_util.js ofdgo_view.js
 var NativeFS embed.FS
@@ -12,19 +12,26 @@
 </head>
 <body>
 	<div class="app">
+		<div id="documentTitleBar" class="document-titlebar">
+			<div id="documentTabs" class="document-tabs"></div>
+			<button id="documentNewTab" class="document-new-tab" type="button" title="新建"><span class="new-icon"></span></button>
+			<div class="document-title-drag"></div>
+			<button id="refreshAppButton" class="app-update" type="button" title="更新" hidden><span class="update-icon"></span></button>
+		</div>
 		<header class="toolbar-frame">
 			<div class="toolbar app-bar">
-				<input id="ofdInput" class="file-input" type="file" accept=".ofd,.pdf">
+				<input id="ofdInput" class="file-input" type="file" accept=".ofd,.pdf" multiple>
 				<input id="fontInput" class="file-input" type="file" accept=".ttf,.otf,.ttc,font/*" multiple>
 				<input id="fontDirectoryInput" class="file-input" type="file" webkitdirectory multiple>
 				<div class="tool-group">
 					<button id="ofdButton" class="icon-button" type="button" title="打开"><span class="open-icon"></span></button>
-					<button id="closeButton" class="icon-button" type="button" title="关闭" disabled><span class="close-icon"></span></button>
+					<button id="closeButton" class="icon-button" type="button" title="关闭文档" disabled><span class="close-icon"></span></button>
 					<button id="newButton" class="icon-button" type="button" title="新建"><span class="new-icon"></span></button>
 					<button id="saveButton" class="icon-button" type="button" title="保存" disabled><span class="save-icon"></span></button>
 					<button id="saveAsButton" class="icon-button" type="button" title="另存" disabled><span class="save-as-icon"></span></button>
 					<button id="editButton" class="icon-button" type="button" title="编辑" data-pressed="false" disabled><span class="edit-icon"></span></button>
 					<button id="convertButton" class="icon-button" type="button" title="转换"><span class="convert-icon"></span></button>
+					<button id="printButton" class="icon-button" type="button" title="打印" disabled><span class="print-icon"></span></button>
 					<button id="togglePagesButton" class="icon-button" type="button" title="页面栏" data-pressed="true"><span class="pages-icon"></span></button>
 					<button id="toggleMetaButton" class="icon-button" type="button" title="信息栏" data-pressed="true"><span class="info-icon"></span></button>
 				</div>
@@ -46,10 +53,11 @@
 					<button id="fitHeightButton" class="button" type="button" data-short="高" disabled>适高</button>
 					<button id="rotateButton" class="button" type="button" data-short="转" disabled>旋转</button>
 					<button id="panButton" class="button" type="button" data-short="拖" data-pressed="false" disabled>拖动</button>
-					<button id="continuousButton" class="button" type="button" data-short="连" data-pressed="false" disabled>连续</button>
-					<button id="annotationButton" class="button" type="button" data-short="注" data-pressed="true">注解</button>
 				</div>
 				<div class="tool-group">
+					<button id="pageLayoutButton" class="button" type="button" data-short="单" disabled>单页</button>
+					<button id="continuousButton" class="button" type="button" data-short="连" data-pressed="false" disabled>连续</button>
+					<button id="annotationButton" class="button" type="button" data-short="注" data-pressed="true">注解</button>
 					<button id="renderVectorButton" class="button" type="button" data-short="矢" data-pressed="true" disabled>矢量</button>
 					<button id="renderRasterButton" class="button" type="button" data-short="位" data-pressed="false" disabled>位图</button>
 				</div>
@@ -66,7 +74,6 @@
 					<button id="exportButton" class="button" type="button" data-short="多" disabled>文档</button>
 				</div>
 			</div>
-			<button id="refreshAppButton" class="button app-update" type="button" data-short="更" hidden>更新</button>
 		</header>
 		<div id="editorTools" class="editor-toolbar" hidden>
 			<div class="editor-group editor-actions">
@@ -75,7 +82,6 @@
 				<span>操作</span>
 			</div>
 			<div class="editor-group editor-objects">
-				<button id="compositeBackButton" class="button" type="button" hidden>返回</button>
 				<button id="selectObjectButton" class="button" type="button" data-pressed="true">选择</button>
 				<button id="multiSelectButton" class="button" type="button" data-pressed="false">多选</button>
 				<button id="editObjectButton" class="button" type="button" disabled>修改</button>
@@ -134,7 +140,7 @@
 					<option value="left">左齐</option>
 					<option value="center">居中</option>
 					<option value="right">右齐</option>
-					<option value="justify">两端</option>
+					<option value="justify">两端</option><option value="distributed">分散</option>
 				</select>
 				<label class="editor-field"><span>行距</span><span class="editor-number"><input id="textLineHeight" type="number" min="0" step="any" placeholder="自动" title="行距，0为自动" disabled><span>pt</span></span></label>
 				<button id="textWrap" class="button" type="button" data-pressed="false" disabled>折行</button>
@@ -187,9 +193,24 @@
 				<button id="batchPagesButton" class="editor-group-action" type="button">页面</button>
 			</div>
 		</div>
+<dialog id="aboutPanel" class="form-dialog about-dialog">
+			<form method="dialog">
+				<h2 id="aboutTitle" class="form-title">软件信息</h2>
+				<div class="about-row"><span>构建版本</span><span id="aboutVersion">develop</span></div>
+				<div class="about-row"><span>项目官网</span><a href="https://ofdgo.aite.me/" target="_blank" rel="noreferrer">https://ofdgo.aite.me/</a></div>
+				<div class="about-row"><span>桌面软件</span><a href="https://ofdgo.aite.me/releases/" target="_blank" rel="noreferrer">https://ofdgo.aite.me/releases/</a></div>
+				<div class="about-row"><span>项目仓库</span><a href="https://github.com/xiaoqidun/ofdgo" target="_blank" rel="noreferrer">https://github.com/xiaoqidun/ofdgo</a></div>
+			</form>
+			<section id="associationSection" class="about-associations" hidden>
+				<div class="association-heading">文件关联</div>
+				<div class="association-row" data-scope="user"><span>当前用户</span><span class="association-state"></span><div class="association-actions"><button class="small-button" type="button" data-action="register">注册</button><button class="small-button" type="button" data-action="remove">撤销</button></div></div>
+				<div class="association-row" data-scope="machine"><span>所有用户</span><span class="association-state"></span><div class="association-actions"><button class="small-button" type="button" data-action="register">注册</button><button class="small-button" type="button" data-action="remove">撤销</button></div></div>
+				<div id="associationMessage" class="form-status" hidden></div>
+			</section>
+		</dialog>
 		<dialog id="closePanel" class="form-dialog confirm-dialog">
 			<form method="dialog">
-				<h2 class="form-title">关闭文档</h2>
+				<h2 id="closeTitle" class="form-title">关闭文档</h2>
 				<p class="confirm-message">文档尚未保存</p>
 				<div class="form-actions"><button class="button" value="cancel" autofocus>取消</button><button class="button" value="discard">放弃</button><button class="button" value="save">保存</button></div>
 			</form>
@@ -208,7 +229,6 @@
 						<div id="convertFontRow" class="form-row" hidden><label for="convertFontMode">字体</label><select id="convertFontMode"><option value="0">保持</option><option value="1">内嵌</option><option value="2">外部</option></select></div>
 						<div id="convertDPIRow" class="form-row" hidden><label for="convertDPI">精度</label><div class="form-select"><select id="convertDPI"><option value="96">96 DPI</option><option value="150">150 DPI</option><option value="300" selected>300 DPI</option><option value="600">600 DPI</option></select><span id="convertDPIValue">300</span></div></div>
 						<div class="form-row"><label for="convertDestination">输出</label><select id="convertDestination"><option value="directory">目录</option><option value="archive">打包</option></select></div>
-						<div class="form-row"><label for="convertParallel">并行</label><input id="convertParallel" type="number" min="1" step="1" placeholder="自动"></div>
 					</div>
 					<button id="convertClose" class="button" type="button">关闭</button><button id="convertCancel" class="button" type="button" hidden>取消</button><button id="convertStart" class="button" type="submit" disabled>转换</button>
 				</div>
@@ -216,6 +236,7 @@
 		</dialog>
 		<dialog id="batchPagesPanel" class="form-dialog">
 			<form id="batchPagesForm">
+				<h2 id="batchPagesTitle" class="form-title">复制页面</h2>
 				<div class="form-row"><label for="batchPageAction">操作</label><select id="batchPageAction"><option value="copy">复制</option><option value="move">移动</option><option value="delete">删除</option><option value="save">另存</option></select></div>
 				<div class="form-row"><label for="batchPageRange">页码</label><input id="batchPageRange" type="text" required autocomplete="off" spellcheck="false" autofocus></div>
 				<div id="batchPagePositionRow" class="form-row" hidden><label for="batchPagePosition">位置</label><select id="batchPagePosition"><option value="before">页前</option><option value="after">页后</option><option value="first">开头</option><option value="last">末尾</option></select></div>
@@ -224,6 +245,7 @@
 		</dialog>
 		<dialog id="objectStylePanel" class="form-dialog">
 			<form id="objectStyleForm">
+				<h2 id="objectStyleTitle" class="form-title">对象样式</h2>
 				<div class="form-row"><span>组合</span><div class="form-format"><button id="groupObjectsButton" class="button" type="button">组合</button><button id="ungroupObjectButton" class="button" type="button">解组</button></div></div>
 				<div class="form-row"><span>格式</span><div class="form-format"><button id="copyStyleButton" class="button" type="button">复制</button><button id="pasteStyleButton" class="button" type="button">粘贴</button></div></div>
 				<details id="objectLinkFields" hidden>
@@ -285,6 +307,7 @@
 		</dialog>
 		<dialog id="structureDialog" class="form-dialog structure-dialog">
 			<form id="structureForm">
+				<h2 id="structureTitle" class="form-title">结构标引</h2>
 				<div class="form-row"><label for="structureEntry">标引</label><select id="structureEntry"></select></div>
 				<div id="structureNodeRow" class="form-row"><label for="structureNodeSelect">节点</label><select id="structureNodeSelect"></select></div>
 				<div id="structureActionRow" class="form-row"><label for="structureAction">操作</label><select id="structureAction"><option value="update">修改</option><option value="add">新增</option><option value="bind">绑定</option><option value="delete">删除</option></select></div>
@@ -305,6 +328,7 @@
 		</dialog>
 		<dialog id="outlinePanel" class="form-dialog">
 			<form id="outlineForm">
+				<h2 id="outlinePanelTitle" class="form-title">新增目录</h2>
 				<div class="form-row"><label for="outlineTitle">标题</label><input id="outlineTitle" type="text" required autofocus></div>
 				<div class="form-row"><label for="outlineParent">上级</label><select id="outlineParent"></select></div>
 				<div class="form-row"><label for="outlinePage">页码</label><input id="outlinePage" type="number" min="1" step="1" placeholder="无"></div>
@@ -314,6 +338,7 @@
 		</dialog>
 		<dialog id="objectBoundsPanel" class="form-dialog">
 			<form id="objectBoundsForm">
+				<h2 id="objectBoundsTitle" class="form-title">位置尺寸</h2>
 				<div class="form-pair">
 					<div class="form-row"><label for="objectX">横向</label><div class="form-unit"><input id="objectX" type="number" step="any" required autofocus><span>mm</span></div></div>
 					<div class="form-row"><label for="objectY">纵向</label><div class="form-unit"><input id="objectY" type="number" step="any" required><span>mm</span></div></div>
@@ -328,6 +353,7 @@
 		</dialog>
 		<dialog id="createPanel" class="form-dialog">
 			<form id="createForm">
+				<h2 id="createTitle" class="form-title">新建文档</h2>
 				<div id="createModeRow" class="form-row"><label for="createMode">来源</label><select id="createMode"><option value="blank">空白</option><option value="images">图片</option></select></div>
 				<div class="form-row">
 					<label for="createName">名称</label>
@@ -356,6 +382,7 @@
 		</dialog>
 		<dialog id="importPanel" class="form-dialog">
 			<form id="importForm">
+				<h2 id="importTitle" class="form-title">插入页面</h2>
 				<div class="form-row"><label for="importFile">文档</label><input id="importFile" type="file" accept=".ofd" required autofocus></div>
 				<div class="form-row"><label for="importRange">范围</label><select id="importRange"><option value="all">全部</option><option value="custom">指定</option></select></div>
 				<div id="importDocuments" class="document-list" hidden></div>
@@ -367,6 +394,7 @@
 		</dialog>
 		<dialog id="paragraphPanel" class="form-dialog">
 			<form id="paragraphForm">
+				<h2 id="paragraphTitle" class="form-title">段落设置</h2>
 				<div class="form-row"><label for="firstLineIndent">首行</label><div class="form-unit"><input id="firstLineIndent" type="number" step="any" required autofocus><span>mm</span></div></div>
 				<div class="form-pair">
 					<div class="form-row"><label for="leftIndent">左侧</label><div class="form-unit"><input id="leftIndent" type="number" step="any" required><span>mm</span></div></div>
@@ -378,7 +406,7 @@
 		<dialog id="resourcePanel" class="form-dialog resource-dialog">
 			<form id="resourceForm">
 				<h2 id="resourceTitle" class="form-title">资源管理</h2>
-				<div class="form-row"><label for="resourceKind">类型</label><select id="resourceKind"><option value="Font">字体</option><option value="Image">图片</option><option value="Audio">音频</option><option value="Video">视频</option><option value="Attachment">附件</option><option value="ColorSpace">色彩</option><option value="DrawParam">样式</option></select></div>
+				<div id="resourceTabs" class="panel-tabs"></div>
 				<div class="resource-list-container">
 					<div class="resource-heading"><span>名称</span><span>大小</span><span>引用</span></div>
 					<div class="resource-list-body">
@@ -428,7 +456,7 @@
 					<h2 id="settingsTitle" class="form-title">文档配置</h2>
 					<span id="settingsLocation" class="settings-location"></span>
 				</header>
-				<label class="form-row"><span>类型</span><select id="settingsKind"><option value="bookmarks">书签</option><option value="actions">动作</option><option value="templates">模板</option><option value="layers">图层</option><option value="extensions">扩展</option><option value="ColorSpace" hidden>色彩</option><option value="DrawParam" hidden>样式</option></select></label>
+				<div id="settingsTabs" class="panel-tabs"></div>
 				<div id="settingsBody" class="settings-body">
 					<div id="settingsContext"></div>
 					<div id="settingsContent"></div>
@@ -459,15 +487,28 @@
 		</dialog>
 		<dialog id="infoPanel" class="form-dialog">
 			<form id="infoForm">
-				<label class="form-row"><span>标题</span><input id="infoTitle" type="text" autofocus></label>
-				<label class="form-row"><span>主题</span><input id="infoSubject" type="text"></label>
-				<label class="form-row"><span>作者</span><input id="infoAuthor" type="text"></label>
-				<details class="info-custom"><summary>扩展</summary><div id="infoCustomRows"></div><button id="infoCustomAdd" class="icon-button" type="button" title="添加字段">+</button></details>
+				<h2 id="infoPanelTitle" class="form-title">文档信息</h2>
+				<label class="form-row"><span>文档标识</span><input id="infoDocId" type="text"></label>
+				<label class="form-row"><span>标题</span><textarea id="infoTitle" rows="1" autofocus></textarea></label>
+				<label class="form-row"><span>作者</span><textarea id="infoAuthor" rows="1"></textarea></label>
+				<label class="form-row"><span>主题</span><textarea id="infoSubject" rows="1"></textarea></label>
+				<label class="form-row"><span>摘要</span><textarea id="infoAbstract" rows="2"></textarea></label>
+				<details><summary><span>文档属性</span></summary>
+					<label class="form-row"><span>创建日期</span><input id="infoCreationDate" type="text"></label>
+					<label class="form-row"><span>修改日期</span><input id="infoModDate" type="text"></label>
+					<label class="form-row"><span>文档用途</span><input id="infoDocUsage" type="text"></label>
+					<label class="form-row"><span>封面路径</span><input id="infoCover" type="text"></label>
+					<details><summary><span>关键词</span></summary><div id="infoKeywordRows" class="info-rows"></div><button id="infoKeywordAdd" class="icon-button" type="button" title="添加词条">+</button></details>
+					<label class="form-row"><span>制作软件</span><input id="infoCreator" type="text"></label>
+					<label class="form-row"><span>软件版本</span><input id="infoCreatorVersion" type="text"></label>
+				</details>
+				<details><summary><span>扩展属性</span></summary><div id="infoCustomRows" class="info-rows"></div><button id="infoCustomAdd" class="icon-button" type="button" title="添加属性">+</button></details>
 				<div class="form-actions"><div id="infoStatus" class="form-status"></div><button id="infoCancel" class="button" type="button">取消</button><button class="button" type="submit">确定</button></div>
 			</form>
 		</dialog>
 		<dialog id="annotationCreate" class="form-dialog">
 			<form id="annotationCreateForm">
+				<h2 id="annotationCreateTitle" class="form-title">添加批注</h2>
 				<label class="form-row" data-annotation="watermark"><span>类型</span><select id="annotationContent"><option value="text">文字</option><option value="image">图片</option></select></label>
 				<label class="form-row" data-annotation="replace"><span>原文</span><select id="annotationOld"></select></label>
 				<label class="form-row" data-annotation="replace"><span>字体</span><select id="annotationFont"><option value="keep">原有</option><option value="current">当前</option></select></label>
@@ -497,10 +538,15 @@
 			</form>
 		</dialog>
 		<dialog id="objectPicker" class="form-dialog">
-			<form method="dialog"><div id="objectPickerList" class="object-picker-list"></div><div class="form-actions"><button class="button" type="submit">关闭</button></div></form>
+			<form method="dialog">
+				<h2 id="objectPickerTitle" class="form-title">选择对象</h2>
+				<div id="objectPickerList" class="object-picker-list"></div>
+				<div class="form-actions"><button class="button" type="submit">关闭</button></div>
+			</form>
 		</dialog>
 		<dialog id="annotationNote" class="form-dialog">
 			<form id="annotationForm" method="dialog">
+				<h2 id="annotationNoteTitle" class="form-title">注解详情</h2>
 				<div id="annotationDetail" class="annotation-detail"></div>
 				<div id="annotationFields" hidden>
 					<div class="form-row"><label for="annotationRemark">说明</label><textarea id="annotationRemark" rows="4"></textarea></div>
@@ -511,6 +557,7 @@
 		</dialog>
 		<dialog id="pagePanel" class="form-dialog">
 			<form id="pageForm">
+				<h2 id="pageTitle" class="form-title">页面设置</h2>
 				<div id="pageRangeRow" class="form-row" hidden><span>范围</span><output id="pageRange"></output></div>
 				<div class="form-row">
 					<span id="pageDirectionLabel">方向</span>
@@ -548,6 +595,7 @@
 		</dialog>
 		<dialog id="insertPanel" class="form-dialog">
 			<form id="insertForm">
+				<h2 id="insertTitle" class="form-title">添加图片</h2>
 				<div class="form-row">
 					<label for="insertImage">图片</label>
 					<input id="insertImage" type="file" accept=".png,.jpg,.jpeg,.bmp,.tif,.tiff,image/png,image/jpeg,image/bmp,image/tiff" required autofocus>
@@ -640,6 +688,43 @@
 				<div class="form-actions"><div id="encryptionStatus" class="form-status"></div><button id="encryptionCancel" class="button" type="button">取消</button><button id="encryptionSubmit" class="button" type="submit">确定</button></div>
 			</form>
 		</dialog>
+		<dialog id="printPanel" class="form-dialog print-dialog">
+			<form id="printForm">
+				<h2 id="printTitle" class="form-title">文档打印</h2>
+				<div class="print-content">
+					<div class="print-settings-panel">
+						<fieldset id="printSettings" class="print-settings">
+							<div class="form-row"><label for="printPrinter">打印设备</label><div class="print-field"><select id="printPrinter"><option value="browser">系统打印</option><option value="pdf">另存输出</option></select><button id="printProperties" class="small-button" type="button" hidden>设备属性</button></div></div>
+							<div class="form-row" data-print-row="device" hidden><label for="printCopies">打印份数</label><div class="print-field"><input id="printCopies" type="number" min="1" max="999" value="1"><label class="print-check"><input id="printCollation" type="checkbox" checked>逐份打印</label></div></div>
+							<div class="form-row"><label for="printScope">打印范围</label><select id="printScope"><option value="all">全部页面</option><option value="current">当前页面</option><option value="selected">所选页面</option><option value="range">指定页码</option></select></div>
+							<div class="form-row" data-print-row="range" hidden><label for="printRange">指定页码</label><input id="printRange" type="text" placeholder="1-3,5" autocomplete="off" spellcheck="false"></div>
+							<div class="form-row"><label for="printParity">奇偶筛选</label><div class="print-field"><select id="printParity"><option value="all">全部页面</option><option value="odd">奇数页面</option><option value="even">偶数页面</option></select><label class="print-check"><input id="printReverse" type="checkbox">逆序打印</label></div></div>
+							<div class="form-row"><label for="printMode">页面排版</label><select id="printMode"><option value="single">单页打印</option><option value="multiple">多页合印</option><option value="booklet">小册打印</option><option value="poster">海报拼接</option></select></div>
+							<div class="form-row"><label for="printPaper">纸张大小</label><select id="printPaper"><option value="210,297">A4</option><option value="297,420">A3</option><option value="148,210">A5</option><option value="176,250">B5</option><option value="215.9,279.4">Letter</option><option value="215.9,355.6">Legal</option><option value="source">原页尺寸</option><option value="custom">自定尺寸</option></select></div>
+							<div class="form-row" data-print-row="paper" hidden><label for="printWidth">纸张尺寸</label><div class="print-field"><input id="printWidth" type="number" value="210" min="1" max="5000" step="any" title="纸张宽度"><span>×</span><input id="printHeight" type="number" value="297" min="1" max="5000" step="any" title="纸张高度"><span>mm</span></div></div>
+							<div class="form-row"><label for="printOrientation">纸张方向</label><select id="printOrientation"><option value="portrait">纵向纸张</option><option value="landscape">横向纸张</option></select></div>
+							<div class="form-row"><label for="printScaling">页面缩放</label><select id="printScaling"><option value="shrink">缩小大页</option><option value="fit">适合纸张</option><option value="actual">实际大小</option><option value="custom">自定比例</option></select></div>
+							<div class="form-row" data-print-row="scale" hidden><label for="printScale">缩放比例</label><div class="print-field"><input id="printScale" type="number" min="1" max="10000" value="100" step="1"><span>%</span></div></div>
+							<div class="form-row"><span>额外边距</span><div class="print-field print-margins"><input id="printMarginTop" type="number" min="0" value="0" step="0.1" title="上边距"><input id="printMarginRight" type="number" min="0" value="0" step="0.1" title="右边距"><input id="printMarginBottom" type="number" min="0" value="0" step="0.1" title="下边距"><input id="printMarginLeft" type="number" min="0" value="0" step="0.1" title="左边距"><span>mm</span></div></div>
+							<div class="form-row" data-print-row="multiple" hidden><label for="printGrid">每面页数</label><select id="printGrid"><option value="1,2">2 页</option><option value="2,2">4 页</option><option value="2,3">6 页</option><option value="3,3">9 页</option><option value="4,4">16 页</option></select></div>
+							<div class="form-row" data-print-row="multiple" hidden><label for="printPageOrder">排列顺序</label><select id="printPageOrder"><option value="horizontal">横向顺序</option><option value="horizontalReverse">横向逆序</option><option value="vertical">纵向顺序</option><option value="verticalReverse">纵向逆序</option></select></div>
+							<div class="form-row" data-print-row="gap" hidden><label for="printGap">页面间距</label><div class="print-field"><input id="printGap" type="number" min="0" value="4" step="0.1"><span>mm</span></div></div>
+							<div class="form-row" data-print-row="booklet" hidden><label for="printBinding">装订方向</label><select id="printBinding"><option value="left">左侧装订</option><option value="right">右侧装订</option></select></div>
+							<div class="form-row" data-print-row="booklet" hidden><label for="printBookletSheets">每册纸数</label><input id="printBookletSheets" type="number" min="0" max="2500" placeholder="不分册" title="0表示不分册"></div>
+							<div class="form-row" data-print-row="booklet" hidden><label for="printSheetFrom">纸张范围</label><div class="print-field"><input id="printSheetFrom" type="number" min="1" placeholder="起始" title="起始纸张编号"><span>至</span><input id="printSheetTo" type="number" min="1" placeholder="结束" title="结束纸张编号"></div></div>
+							<div class="form-row" data-print-row="poster" hidden><label for="printOverlap">重叠宽度</label><div class="print-field"><input id="printOverlap" type="number" min="0" value="5" step="0.1"><span>mm</span></div></div>
+							<div class="form-row"><label for="printDuplex">双面方式</label><select id="printDuplex"><option value="simplex">单面打印</option><option value="longEdge">自动长边</option><option value="shortEdge">自动短边</option><option value="manualLongEdge">手动长边</option><option value="manualShortEdge">手动短边</option></select></div>
+							<div class="form-row" data-print-row="sides" hidden><label for="printSides">打印纸面</label><select id="printSides"><option value="all">正反两面</option><option value="front">只印正面</option><option value="back">只印背面</option></select></div>
+							<div class="form-row" data-print-row="manual" hidden><span>背面处理</span><div class="print-field"><label class="print-check"><input id="printBackReverse" type="checkbox">倒序送纸</label><label class="print-check" title="背面旋转180°"><input id="printBackRotate" type="checkbox">背面旋转</label></div></div>
+							<div class="form-row"><label for="printContents">打印内容</label><select id="printContents"><option value="documentAndAnnotations">文档注解</option><option value="document">文档表单</option><option value="annotations">仅限注解</option><option value="forms">仅限表单</option></select></div>
+							<div class="print-options"><label><input id="printRotate" type="checkbox" checked>自动旋转</label><label><input id="printGrayscale" type="checkbox">灰度打印</label><label><input id="printBorders" type="checkbox">页面边框</label><label><input id="printCropMarks" type="checkbox">裁切标记</label><label><input id="printRaster" type="checkbox">图像打印</label><div class="form-select"><select id="printDPI" title="图像精度"><option value="96">96 DPI</option><option value="150">150 DPI</option><option value="300" selected>300 DPI</option><option value="600">600 DPI</option></select><span id="printDPIValue">300</span></div><label data-print-row="poster" title="仅拼接超出纸面的页面" hidden><input id="printTileOnlyLarge" type="checkbox" checked>仅拼大页</label><label data-print-row="poster" hidden><input id="printLabels" type="checkbox" checked>拼接标签</label></div>
+						</fieldset>
+						<div class="form-actions"><button id="printCancel" class="button" type="button">关闭</button><button id="printSubmit" class="button" type="submit" disabled>打印</button></div>
+					</div>
+					<div class="print-preview"><div class="print-preview-stage"><div id="printPreview" class="print-preview-page"></div><div id="printProgress" class="progress-panel print-progress"><div id="printSpinner" class="progress-spinner" hidden></div><div id="printStatus" class="progress-label"></div><div id="printProgressTrack" class="progress-track" hidden><div id="printProgressBar" class="progress-bar"></div></div></div></div><div class="print-preview-tools"><button id="printPrevious" class="icon-button arrow-prev" type="button" title="上一页"></button><label id="printPageControl" class="page-control"><input id="printPreviewNumber" type="number" min="1" value="1" title="预览纸面"><span>/</span><span id="printPageCount">0</span></label><button id="printNext" class="icon-button arrow-next" type="button" title="下一页"></button></div></div>
+				</div>
+			</form>
+		</dialog>
 		<dialog id="exportPanel" class="form-dialog">
 			<form id="exportForm">
 				<h2 id="exportTitle" class="form-title">导出文档</h2>
@@ -791,7 +876,7 @@
 				<section id="signaturePanel" class="signature-panel" hidden>
 					<div class="panel-row">
 						<div id="signaturePanelTitle" class="panel-title compact">签名</div>
-						<span id="signatureSummary" class="count-pill">0</span>
+						<div class="panel-actions"><span id="signatureSummary" class="count-pill">0</span><button id="signatureClear" class="small-button" type="button" hidden>清空</button></div>
 					</div>
 					<div id="signatureList" class="signature-list"></div>
 				</section>
@@ -819,14 +904,13 @@
 		</main>

 		<footer class="app-footer app-bar">
-			<a class="footer-brand" href="https://github.com/xiaoqidun/ofdgo" target="_blank" rel="noreferrer">OFDGo</a>
+			<div class="footer-side"><a class="footer-action" href="https://aite.me/" target="_blank" rel="noreferrer">官方网站</a></div>
 			<div id="statusText" class="status-text">正在准备引擎</div>
-			<nav class="footer-links">
-				<a href="https://aite.me/" target="_blank" rel="noreferrer">官方网站</a>
-			</nav>
+			<div class="footer-side footer-side-right"><button id="aboutButton" class="footer-action" type="button">软件信息</button></div>
 		</footer>
 	</div>

+	<div id="ofdgoPrintDocument">请先在OFDGo中打开打印预览，准备完整文档后打印。</div>
 	<script type="module" src="./ofdgo.js"></script>
 </body>
 </html>
@@ -14,6 +14,10 @@
 	--focus: #0f7b68;
 	--sidebar-width: clamp(220px, 20vw, 292px);
 	--bar-bg: #fbfcfd;
+	--titlebar-background: #e8edf0;
+	--titlebar-foreground: #1f2428;
+	--titlebar-inactive-background: #eef1f4;
+	--titlebar-inactive-foreground: #66737f;
 	--bar-height: 40px;
 	--bar-pad: 5px 10px;
 	--control-height: 28px;
@@ -22,10 +26,194 @@
 	--shadow-page: 0 14px 30px rgba(31, 36, 40, 0.16);
 }

+.form-dialog.print-dialog {
+	width: 920px;
+}
+
+.print-content {
+	display: grid;
+	grid-template-columns: 310px minmax(0, 1fr);
+	height: min(62dvh, 660px);
+	min-height: 240px;
+	gap: 12px;
+}
+
+.print-settings {
+	flex: 1;
+	min-width: 0;
+	min-height: 0;
+	margin: 0;
+	padding: 0;
+	overflow: auto;
+	border: 0;
+}
+
+.print-settings .form-row {
+	display: grid;
+	grid-template-columns: 4em minmax(0, 1fr);
+	align-items: center;
+	gap: 8px;
+	margin-bottom: 8px;
+}
+
+.print-settings [hidden] { display: none !important; }
+.print-dialog :is(input, select, button):focus-visible { outline-offset: -2px; }
+.print-field { display: flex; min-width: 0; align-items: center; gap: 6px; }
+.print-dialog .print-field > :is(input, select) { flex: 1 1 0; min-width: 0; width: 0; }
+.print-field > :is(.print-check, button) { flex: 0 0 calc(5em + 4px); }
+.print-field > button { height: var(--control-height); font: inherit; }
+.print-field:has(#printBackReverse) .print-check:first-child { flex: 1; justify-content: start; }
+.print-field > span { flex: none; color: var(--text-muted); white-space: nowrap; }
+.print-dialog .print-settings .print-margins input { padding: 0 3px; text-align: center; }
+.print-check { display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
+.print-options { display: grid; grid-template-columns: repeat(3, max-content); grid-auto-rows: var(--control-height); align-items: center; justify-content: space-between; gap: 8px; margin-top: 12px; }
+.print-options label { display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
+.print-field > .print-check { justify-content: flex-end; }
+.print-options .form-select select { flex: 1; width: 0; }
+.print-check input, .print-options input { width: 1em; height: 1em; margin: 0; accent-color: var(--accent); }
+.print-settings-panel, .print-preview { display: flex; min-width: 0; min-height: 0; flex-direction: column; gap: 12px; }
+.print-dialog .form-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
+.print-preview-stage { position: relative; display: flex; flex: 1; min-height: 0; }
+.print-preview-stage .print-progress { position: absolute; bottom: 12px; max-width: calc(100% - 24px); }
+.print-progress:has(.progress-label:empty) { display: none; }
+.print-progress:has(.progress-spinner[hidden]) { grid-template-columns: minmax(0, 1fr); }
+
+.print-preview-page {
+	display: grid;
+	flex: 1;
+	min-width: 0;
+	min-height: 0;
+	justify-items: safe center;
+	align-items: safe center;
+	padding: 12px;
+	overflow: hidden;
+	background: #e1e6e9;
+	border: 1px solid var(--line);
+}
+
+.print-preview-page img { display: block; max-width: none; background: white; box-shadow: var(--shadow-soft); }
+.print-preview-tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 5px; }
+#ofdgoPrintDocument { display: none; }
+
+@media (max-width: 680px) {
+	.print-content { grid-template-columns: minmax(0, 1fr); height: auto; min-height: 0; }
+	.print-settings { flex: none; max-height: 34dvh; }
+	.print-preview-stage { flex: none; height: 32dvh; min-height: 160px; }
+	.print-preview-tools { justify-content: space-between; }
+}
+
+@media print {
+	html, body { height: auto !important; min-height: 0 !important; overflow: visible !important; margin: 0 !important; padding: 0 !important; background: white !important; }
+	body > :not(#ofdgoPrintDocument) { display: none !important; }
+	dialog { display: none !important; }
+	#ofdgoPrintDocument { display: block !important; color: black; background: white; }
+	#ofdgoPrintDocument section { display: block; margin: 0; padding: 0; overflow: hidden; break-after: page; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
+	#ofdgoPrintDocument section:last-child { break-after: auto; }
+	#ofdgoPrintDocument img { display: block; width: 100%; height: 100%; }
+}
+
 * {
 	box-sizing: border-box;
 }

+.document-titlebar {
+	--tab-action-gap: max(2px, calc((var(--titlebar-height, 36px) - 28px) / 2));
+	display: flex;
+	min-width: 0;
+	align-items: stretch;
+	height: var(--titlebar-height, 36px);
+	min-height: 0;
+	flex: 0 0 auto;
+	padding-left: var(--titlebar-left, 0px);
+	padding-right: var(--titlebar-right, 10px);
+	border-top: 1px solid var(--line);
+	background: var(--titlebar-background);
+	color: var(--titlebar-foreground);
+	user-select: none;
+}
+
+.document-tabs {
+	display: flex;
+	min-width: 0;
+	min-height: 0;
+	border-right: 1px solid transparent;
+	overflow-x: auto;
+	scrollbar-width: none;
+	align-items: stretch;
+}
+
+.document-tab {
+	display: flex;
+	align-items: center;
+	flex: 0 0 210px;
+	width: 210px;
+	min-width: 100px;
+	max-width: min(240px, 100%);
+	gap: 8px;
+	padding: 0 var(--tab-action-gap) 0 12px;
+	border: 0;
+	border-right: 1px solid var(--line);
+	background: transparent;
+	color: var(--text-muted);
+	font-size: 13px;
+}
+
+.document-tab[data-selected="true"] {
+	background: var(--bar-bg);
+	color: var(--titlebar-foreground);
+}
+
+.document-tab-name {
+	min-width: 0;
+	flex: 1;
+	overflow: hidden;
+	text-overflow: ellipsis;
+	white-space: nowrap;
+}
+
+.document-tab[data-error="true"] .document-tab-name {
+	color: #b42318;
+}
+
+.document-titlebar[data-active="false"] {
+	background: var(--titlebar-inactive-background);
+	color: var(--titlebar-inactive-foreground);
+}
+
+.document-titlebar[data-active="false"] .document-tab {
+	color: var(--titlebar-inactive-foreground);
+}
+
+.document-tab-close,
+.document-new-tab,
+.app-update {
+	display: grid;
+	place-items: center;
+	flex: 0 0 28px;
+	width: 28px;
+	min-width: 28px;
+	align-self: center;
+	height: min(26px, calc(var(--titlebar-height, 36px) - 6px));
+	border: 0;
+	padding: 0;
+	background: transparent;
+}
+
+.document-tab-close:hover,
+.document-new-tab:hover,
+.app-update:not(:disabled):hover {
+	background: var(--accent-soft);
+}
+
+.document-new-tab {
+	margin-left: var(--tab-action-gap);
+}
+
+.document-title-drag {
+	flex: 1;
+	min-width: 32px;
+}
+
 html {
 	width: 100%;
 	height: 100%;
@@ -81,14 +269,15 @@ a:focus-visible {

 .app {
 	display: grid;
-	grid-template-rows: auto minmax(0, 1fr) auto;
+	grid-template-columns: minmax(0, 1fr);
+	grid-template-rows: auto auto minmax(0, 1fr) auto;
 	width: 100%;
 	height: 100dvh;
 	overflow: hidden;
 }

 .app:has(.editor-toolbar:not([hidden])) {
-	grid-template-rows: auto auto minmax(0, 1fr) auto;
+	grid-template-rows: auto auto auto minmax(0, 1fr) auto;
 }

 .editor-toolbar {
@@ -135,12 +324,18 @@ a:focus-visible {
 }

 .editor-group > select {
+	-webkit-appearance: none;
+	appearance: none;
 	height: var(--control-height);
-	padding: 0 4px;
+	padding: 0 12px 0 4px;
 	border: 1px solid var(--line-strong);
 	border-radius: 0;
 	background: #fff;
 	color: #1f2428;
+	background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
+	background-position: right 7px center, right 4px center;
+	background-size: 3px 3px;
+	background-repeat: no-repeat;
 }

 .editor-paragraph > .editor-field,
@@ -449,40 +644,18 @@ a:focus-visible {
 	display: flex;
 	min-width: 0;
 	background: var(--bar-bg);
+	border-top: 1px solid var(--line);
 	border-bottom: 1px solid var(--line);
 }

 .toolbar-frame > .toolbar {
 	flex: 1 1 auto;
 	border-bottom: 0;
+	box-shadow: none;
 }

 .app-update {
-	order: 2;
-	flex: 0 0 auto;
-	align-self: center;
-	margin: 0 10px 0 0;
-	border-color: var(--accent);
-	background: #e4f3ef;
-	color: var(--accent-strong);
-	font-size: 14px;
-	line-height: 1;
-}
-
-.app-update:not(:disabled):hover {
-	border-color: var(--accent);
-	background: #f2faf7;
-}
-
-.toolbar-frame:has(.app-update:not([hidden]))::before {
-	order: 1;
-	flex: 0 0 1px;
-	align-self: center;
-	width: 1px;
-	height: 22px;
-	margin: 0 12px 0 2px;
-	background: var(--line);
-	content: "";
+	margin-left: var(--tab-action-gap);
 }

 .app-update[hidden] {
@@ -562,10 +735,12 @@ button:not(:disabled):hover {
 .open-icon,
 .close-icon,
 .new-icon,
+.update-icon,
 .save-icon,
 .save-as-icon,
 .edit-icon,
 .convert-icon,
+.print-icon,
 .pages-icon,
 .info-icon {
 	width: 16px;
@@ -575,7 +750,7 @@ button:not(:disabled):hover {
 }

 .open-icon {
-	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 7V4h6l3 3h9v13H3Z'/%3E%3C/svg%3E") center / contain no-repeat;
+	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 7V3h6l3 4h9v14H3Z'/%3E%3C/svg%3E") center / contain no-repeat;
 }

 .close-icon {
@@ -586,6 +761,10 @@ button:not(:disabled):hover {
 	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3v18M3 12h18'/%3E%3C/svg%3E") center / contain no-repeat;
 }

+.update-icon {
+	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 11a8 8 0 0 0-14.9-3M4 4v4h4M4 13a8 8 0 0 0 14.9 3M20 20v-4h-4'/%3E%3C/svg%3E") center / contain no-repeat;
+}
+
 .save-icon {
 	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2Z'/%3E%3Cpath d='M17 21v-8H7v8M7 3v5h8'/%3E%3C/svg%3E") center / contain no-repeat;
 }
@@ -602,6 +781,10 @@ button:not(:disabled):hover {
 	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 7h18l-4-4M21 17H3l4 4'/%3E%3C/svg%3E") center / contain no-repeat;
 }

+.print-icon {
+	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9V3h12v6M6 17H3V9h18v8h-3M6 13h12v8H6Z'/%3E%3C/svg%3E") center / contain no-repeat;
+}
+
 .pages-icon {
 	mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 3h18M3 12h18M3 21h18'/%3E%3C/svg%3E") center / contain no-repeat;
 }
@@ -692,6 +875,7 @@ button:not(:disabled):hover {
 .toolbar-select .format-select {
 	width: calc(2em + 22px);
 	border-color: var(--line-strong);
+	-webkit-appearance: none;
 	appearance: none;
 	color: transparent;
 }
@@ -737,6 +921,7 @@ button:not(:disabled):hover {
 	width: 320px;
 	max-width: calc(100% - 24px);
 	max-height: calc(100dvh - 24px);
+	overflow: auto;
 	margin: auto;
 	padding: 0;
 	border: 1px solid var(--line);
@@ -747,6 +932,7 @@ button:not(:disabled):hover {
 }

 .form-dialog::backdrop {
+	top: var(--titlebar-height, 36px);
 	background: rgb(31 36 40 / 18%);
 }

@@ -754,6 +940,68 @@ button:not(:disabled):hover {
 	padding: 12px;
 }

+.about-dialog {
+	width: max-content;
+}
+
+.about-row {
+	display: grid;
+	grid-template-columns: 4em minmax(0, 1fr);
+	align-items: start;
+	gap: 12px;
+	margin-bottom: 12px;
+}
+
+.about-row > span:first-child {
+	text-align-last: justify;
+}
+
+.about-row:last-child {
+	margin-bottom: 0;
+}
+
+.about-row a {
+	overflow-wrap: anywhere;
+}
+
+.about-associations {
+	padding: 12px;
+	border-top: 1px solid var(--line);
+}
+
+.association-heading {
+	margin-bottom: 12px;
+	font-weight: 600;
+	white-space: nowrap;
+}
+
+.association-row {
+	display: grid;
+	grid-template-columns: 4em minmax(0, 1fr) auto;
+	align-items: center;
+	gap: 12px;
+	white-space: nowrap;
+}
+
+.association-row + .association-row {
+	margin-top: 12px;
+}
+
+.association-state {
+	color: var(--text-muted);
+}
+
+.association-actions {
+	display: flex;
+	gap: 8px;
+}
+
+#associationMessage {
+	margin-top: 12px;
+	white-space: nowrap;
+	overflow-x: auto;
+}
+
 .form-title {
 	margin: -12px -12px 12px;
 	padding: 10px 12px;
@@ -774,6 +1022,10 @@ button:not(:disabled):hover {
 	justify-content: end;
 }

+.confirm-dialog .form-actions button[hidden] {
+	display: none;
+}
+
 .convert-dialog {
 	--convert-control-width: 64px;
 	width: 720px;
@@ -788,7 +1040,7 @@ button:not(:disabled):hover {
 .convert-options {
 	flex: none;
 	display: grid;
-	grid-template-columns: repeat(5, minmax(0, 1fr));
+	grid-template-columns: repeat(4, minmax(0, 1fr));
 	grid-column: 1 / -1;
 	grid-row: 1;
 	width: 100%;
@@ -797,11 +1049,11 @@ button:not(:disabled):hover {
 }

 .convert-options:has(#convertDPIRow[hidden]):has(#convertFontRow[hidden]) {
-	grid-template-columns: repeat(4, minmax(0, 1fr));
+	grid-template-columns: repeat(3, minmax(0, 1fr));
 }

 .convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow:not([hidden])) {
-	grid-template-columns: repeat(6, minmax(0, 1fr));
+	grid-template-columns: repeat(5, minmax(0, 1fr));
 }

 .convert-options .form-row {
@@ -901,6 +1153,7 @@ button:not(:disabled):hover {
 }

 .convert-format select {
+	-webkit-appearance: none;
 	appearance: none;
 	padding: 0 12px;
 }
@@ -1059,8 +1312,8 @@ button:not(:disabled):hover {
 	.convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow:not([hidden])) {
 		grid-template-columns: repeat(2, minmax(0, 1fr));
 	}
-	.convert-options:has(#convertDPIRow[hidden]):has(#convertFontRow:not([hidden])) .form-row:last-child,
-	.convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow[hidden]) .form-row:last-child {
+	.convert-options:has(#convertDPIRow[hidden]):has(#convertFontRow[hidden]) .form-row:last-child,
+	.convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow:not([hidden])) .form-row:last-child {
 		grid-column: 1 / -1;
 	}
 	.convert-options .form-row {
@@ -1268,9 +1521,10 @@ button:not(:disabled):hover {
 	outline-offset: 2px;
 }

-.info-custom-row input,
+.info-rows textarea,
 .gradient-stop-row input[type="number"],
 .structure-attribute > input,
+.print-options select,
 .form-row input[type="text"],
 .form-row input[type="password"],
 .form-row input[type="number"],
@@ -1287,7 +1541,8 @@ button:not(:disabled):hover {
 	color: #1f2428;
 }

-.form-row .form-select select {
+.form-select select {
+	-webkit-appearance: none;
 	appearance: none;
 	color: transparent;
 }
@@ -1312,19 +1567,71 @@ button:not(:disabled):hover {
 	margin-bottom: 12px;
 }

-#infoCustomRows {
+#infoPanel {
+	width: 480px;
+}
+
+#infoPanel .form-row,
+#infoPanel summary {
+	grid-template-columns: 4em minmax(0, 1fr);
+}
+
+#infoPanel .form-row > span,
+#infoPanel summary > span {
+	text-align-last: justify;
+	white-space: nowrap;
+}
+
+#infoPanel summary {
+	display: grid;
+	align-items: center;
+	gap: 12px;
+	min-height: var(--control-height);
+}
+
+#infoPanel summary::after {
+	content: "▸";
+	justify-self: end;
+}
+
+#infoPanel details[open] > summary::after {
+	content: "▾";
+}
+
+#infoPanel details > .form-row:last-child {
+	margin-bottom: 0;
+}
+
+#infoPanel textarea {
+	height: auto;
+	min-height: var(--control-height);
+	padding: 3px 6px;
+	line-height: calc(var(--control-height) - 8px);
+	resize: vertical;
+}
+
+#infoPanel .form-actions {
+	grid-template-columns: minmax(0, 1fr) repeat(2, 4em);
+}
+
+.info-rows {
 	max-height: 240px;
 	overflow-y: auto;
 }

-.info-custom-row {
+.info-custom-row,
+.info-keyword-row {
 	display: grid;
-	grid-template-columns: minmax(0, 1fr) minmax(0, 2fr) var(--control-height);
+	grid-template-columns: repeat(2, minmax(0, 1fr)) var(--control-height);
 	gap: 8px;
 	margin: 8px 0;
 }

-#infoCustomRows > :first-child {
+.info-keyword-row {
+	grid-template-columns: minmax(0, 1fr) var(--control-height);
+}
+
+.info-rows > :first-child {
 	margin-top: 0;
 }

@@ -1363,7 +1670,7 @@ button:not(:disabled):hover {
 	width: 100%;
 }

-#infoCustomRows :focus-visible,
+.info-rows :focus-visible,
 #gradientStops :focus-visible {
 	outline-offset: -2px;
 }
@@ -1848,27 +2155,33 @@ body[data-hide-meta] .meta-panel {
 	max-width: calc(100vw - 26px);
 }

-.invoice-dialog .settings-body {
-	padding-top: 12px;
-}
-
-.invoice-tabs {
+.panel-tabs {
 	display: flex;
+	flex-shrink: 0;
+	min-width: 0;
 	gap: 16px;
-	margin-block: 12px;
+	margin-bottom: 12px;
 	border-bottom: 1px solid var(--line);
+	overflow-x: auto;
+	overscroll-behavior-x: contain;
+	scrollbar-width: thin;
 }

-.invoice-tabs > .button {
+.panel-tabs[hidden] {
+	display: none;
+}
+
+.panel-tabs > .button {
 	flex: none;
 	min-width: 2em;
 	padding: 8px 0;
 	border: 0;
 	border-bottom: 2px solid transparent;
 	background: transparent;
+	white-space: nowrap;
 }

-.invoice-tabs > .button[data-selected="true"] {
+.panel-tabs > .button[data-selected="true"] {
 	border-bottom-color: currentColor;
 	color: var(--accent);
 }
@@ -1986,10 +2299,14 @@ body[data-hide-meta] .meta-panel {
 .settings-dialog > form {
 	display: flex;
 	flex-direction: column;
-	max-height: calc(100dvh - 26px);
+	max-height: calc(100dvh - var(--dialog-inset, 0px) - 26px);
 	padding: 0;
 }

+.settings-dialog > form > .panel-tabs {
+	margin: 0 12px;
+}
+
 .settings-header {
 	display: flex;
 	flex: none;
@@ -2035,7 +2352,7 @@ body[data-hide-meta] .meta-panel {
 .settings-body {
 	min-width: 0;
 	min-height: 0;
-	padding: 0 12px 12px;
+	padding: 12px;
 	overflow: auto;
 	overscroll-behavior: contain;
 }
@@ -2563,8 +2880,9 @@ button.outline-link:hover {
 }

 .page-list {
+	--thumb-gap: 12px;
 	display: grid;
-	gap: 12px;
+	gap: var(--thumb-gap);
 }

 .virtual-pages {
@@ -2592,6 +2910,18 @@ button.outline-link:hover {
 	aspect-ratio: auto;
 }

+.page-list.grouped-pages .thumb-paper {
+	width: var(--thumb-paper-width);
+	height: var(--thumb-paper-height);
+	justify-self: center;
+	align-self: start;
+}
+
+.page-list.grouped-pages .page-list-item[data-pressed] .thumb-label,
+.page-list.grouped-pages .page-list-item[data-pressed] .thumb-size {
+	padding-right: 24px;
+}
+
 .page-list.virtual-pages .thumb-label {
 	line-height: 20px;
 }
@@ -2874,6 +3204,16 @@ button.outline-link:hover {
 	box-shadow: none;
 }

+.page-frame.continuous .page-shell::after {
+	content: "";
+	position: absolute;
+	inset: 0;
+	border-right: 1px solid rgba(170, 183, 193, 0.55);
+	border-bottom: 1px solid rgba(170, 183, 193, 0.55);
+	pointer-events: none;
+	z-index: 1;
+}
+
 .page-shell.error {
 	background: #fff8f7;
 }
@@ -2890,6 +3230,10 @@ button.outline-link:hover {
 	pointer-events: none;
 }

+.edit-object.edit-parent {
+	outline: 1px dashed var(--line);
+}
+
 .edit-text-source {
 	visibility: hidden;
 }
@@ -2918,13 +3262,34 @@ button.outline-link:hover {
 	text-indent: inherit;
 }

+.edit-text div::after,
+.edit-text p::after {
+	content: "";
+	font-size: 0;
+}
+
 .edit-text span[data-glyph] {
 	position: relative;
 	-webkit-text-fill-color: transparent;
 }

+.edit-text span[data-glyph]::selection {
+	background: transparent;
+	color: transparent;
+	-webkit-text-fill-color: transparent;
+}
+
+.edit-text span[data-glyph][data-selected] {
+	background: Highlight;
+}
+
+.edit-text span[data-glyph][data-selected]::after {
+	color: HighlightText;
+}
+
 .edit-text span[data-glyph]::after {
 	content: attr(data-glyph);
+	letter-spacing: 0;
 	position: absolute;
 	left: 0;
 	top: 0;
@@ -3102,12 +3467,17 @@ button.outline-link:hover {
 .page-list-item.drop-before::before { top: -6px; }
 .page-list-item.drop-after::after { bottom: -6px; }

-.edit-line::before {
-	position: absolute;
-	inset: calc(-4px / var(--surface-scale));
-	content: "";
+.grouped-pages .page-list-item.drop-before::before,
+.grouped-pages .page-list-item.drop-after::after {
+	top: 0;
+	bottom: 0;
+	width: 2px;
+	height: auto;
 }

+.grouped-pages .page-list-item.drop-before::before { left: calc(-1px - var(--thumb-gap) / 2); right: auto; }
+.grouped-pages .page-list-item.drop-after::after { right: calc(-1px - var(--thumb-gap) / 2); left: auto; }
+
 .edit-object.erasing {
 	background: var(--accent-soft);
 	outline-style: dashed;
@@ -3975,12 +4345,47 @@ audio.page-media {
 	font-size: 12px;
 }

-.footer-brand {
+.footer-side {
+	display: flex;
+	align-items: center;
 	flex: 0 0 var(--sidebar-width);
 	min-width: 0;
-	overflow: hidden;
-	text-overflow: ellipsis;
+}
+
+.footer-side-right {
+	justify-content: flex-end;
+}
+
+.footer-action {
+	display: inline-flex;
+	align-items: center;
+	justify-content: flex-start;
+	flex: 0 0 64px;
+	width: 64px;
+	height: 24px;
+	padding: 0;
+	border: 0;
+	background: transparent;
+	color: var(--accent-strong);
+	font: inherit;
+	text-decoration: none;
 	white-space: nowrap;
+	cursor: pointer;
+	transition: none;
+}
+
+.footer-side-right .footer-action {
+	justify-content: flex-end;
+}
+
+.app-footer .footer-action:hover {
+	border-color: transparent;
+	background: transparent;
+	text-decoration: underline;
+}
+
+.footer-action:focus-visible {
+	outline-offset: 0;
 }

 .status-text {
@@ -3994,26 +4399,6 @@ audio.page-media {
 	white-space: nowrap;
 }

-.footer-links {
-	display: inline-flex;
-	align-items: center;
-	gap: 12px;
-	flex: 0 0 var(--sidebar-width);
-	justify-content: flex-end;
-	min-width: 0;
-	overflow: hidden;
-}
-
-.app-footer a {
-	color: var(--accent-strong);
-	font-weight: 400;
-	text-decoration: none;
-}
-
-.app-footer a:hover {
-	text-decoration: underline;
-}
-
@media (display-mode: standalone) {
 	body {
 		min-height: 100svh;
@@ -4039,12 +4424,8 @@ audio.page-media {
 	}

 	.editor-group > select {
-		appearance: none;
 		padding-inline: 2px 10px;
-		background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
 		background-position: right 5px center, right 2px center;
-		background-size: 3px 3px;
-		background-repeat: no-repeat;
 	}

 	.editor-group:has(#textFont) {
@@ -4060,9 +4441,37 @@ audio.page-media {
 	}
 }

-@media (min-width: 901px) and (max-width: 1600px) {
+@media (min-width: 901px) and (max-width: 1900px) {
 	.toolbar {
-		--tool-gap: 6px;
+		--tool-gap: 4px;
+	}
+
+	.toolbar .button {
+		padding-inline: 6px;
+	}
+
+	.toolbar .tool-group + .tool-group::before {
+		margin-inline: 4px;
+	}
+}
+
+@media (min-width: 901px) and (max-width: 1400px) {
+	.toolbar {
+		--tool-gap: 3px;
+	}
+
+	.toolbar .button {
+		padding-inline: 4px;
+	}
+
+	.toolbar .tool-group + .tool-group::before {
+		margin-inline: 0;
+	}
+
+	.toolbar .page-control {
+		grid-template-columns: max(3ch, var(--page-width, 3ch)) auto max(3ch, var(--page-width, 3ch));
+		gap: 4px;
+		padding-inline: 4px;
 	}
 }

@@ -4083,8 +4492,7 @@ audio.page-media {
 		display: none;
 	}

-	.footer-brand,
-	.footer-links {
+	.footer-side {
 		flex: 0 1 auto;
 	}

@@ -4139,16 +4547,16 @@ audio.page-media {
 }

@media (max-width: 640px) {
-	.app-update {
-		margin-right: 8px;
-	}
-
 	:root {
 		--bar-height: 42px;
 		--control-height: 28px;
 		--bar-pad: 5px 8px;
 	}

+	.document-titlebar {
+		padding-right: var(--titlebar-right, 8px);
+	}
+
 	.workspace {
 		grid-template-columns: 1fr;
 	}
@@ -4157,8 +4565,7 @@ audio.page-media {
 		grid-template-columns: repeat(3, minmax(0, 1fr));
 	}

-	.tool-group + .tool-group::before,
-	.toolbar-frame:has(.app-update:not([hidden]))::before {
+	.tool-group + .tool-group::before {
 		display: none;
 	}

@@ -1,17 +1,18 @@
 const DATABASE = "ofdgo";

 export class FontPicker {
-	constructor(input, toggle, list, onChange, onOpen) {
-		Object.assign(this, { input, toggle, list, onChange, onOpen, fonts: [], value: "", active: -1, open: false });
+	constructor(input, toggle, list, onChange, onOpen, groupFonts) {
+		Object.assign(this, { input, toggle, list, onChange, onOpen, groupFonts, fonts: [], groups: [], value: "", active: -1, open: false });
 		input.addEventListener("input", () => this.show(input.value));
 		input.addEventListener("focus", () => input.select());
-		input.addEventListener("click", () => { if (!this.open) this.show(); });
+		input.addEventListener("pointerdown", event => { if (event.button === 0 && !this.open) event.preventDefault(); });
+		input.addEventListener("click", () => { if (!this.open) { input.focus(); input.select(); this.show(); } });
 		input.addEventListener("keydown", event => this.keyDown(event));
 		input.addEventListener("blur", () => { this.commitExact(); this.close(); });
 		toggle.addEventListener("pointerdown", event => event.preventDefault());
 		toggle.addEventListener("click", () => {
 			if (this.open) this.close();
-			else { input.focus(); this.show(); }
+			else { input.focus(); input.select(); this.show(); }
 		});
 		list.addEventListener("pointerdown", event => {
 			if (event.target.closest(".font-option")) event.preventDefault();
@@ -23,17 +24,40 @@ export class FontPicker {
 		window.addEventListener("resize", () => this.close());
 	}

-	setFonts(fonts, selected) {
-		this.close();
+	setFonts(fonts, selected, preserve = false) {
+		const open = preserve && this.open;
+		if (!open) this.close();
 		this.fonts = fonts;
+		this.groups = fonts.map((_, index) => [index]);
 		this.names = new Map();
 		for (const font of fonts) {
-			const name = (font.fullName || font.name).normalize("NFKC").toLocaleLowerCase();
+			const name = (font.menuFamily || font.fullName || font.name).normalize("NFKC").toLocaleLowerCase();
 			this.names.set(name, (this.names.get(name) || 0) + 1);
 		}
-		const key = font => font?.id || font?.postscriptName;
+		const key = font => font?.richKey || font?.id || font?.postscriptName;
 		this.value = !fonts.length ? "" : selected === null ? "-1" : String(Math.max(0, fonts.findIndex(font => key(font) === key(selected))));
-		this.restore();
+		if (open) {
+			const active = this.matches[this.active]?.font;
+			this.show(this.query, false);
+			const index = active ? this.matches.findIndex(({ font }) => !font.disabled && key(font) === key(active)) : -1;
+			if (index >= 0) this.activate(index);
+		} else this.restore();
+		if (this.groupFonts) this.grouping = this.groupFonts(fonts).then(groups => {
+			if (this.fonts !== fonts) return;
+			this.groups = groups;
+			this.names.clear();
+			for (const group of groups) {
+				const font = fonts[group[0]], name = (font.menuFamily || font.fullName || font.name).normalize("NFKC").toLocaleLowerCase();
+				this.names.set(name, (this.names.get(name) || 0) + 1);
+			}
+			if (this.open) {
+				const active = this.matches[this.active]?.index;
+				this.show(this.query, false);
+				const index = this.matches.findIndex(({ group, font }) => group.includes(active) && !font.disabled);
+				if (index >= 0) this.activate(index);
+			}
+			else this.restore();
+		}).catch(() => {});
 	}

 	setDisabled(disabled) {
@@ -43,23 +67,34 @@ export class FontPicker {

 	restore() {
 		const font = this.fonts[Number(this.value)];
-		this.input.value = font?.fullName || font?.name || "";
+		const value = font?.menuFamily || font?.fullName || font?.name || "";
+		if (this.input.value !== value) {
+			this.input.value = value;
+			if (document.activeElement === this.input) this.input.select();
+		}
 		this.input.scrollLeft = 0;
 		this.input.title = font ? [this.input.value, this.sourceLabel(font)].filter(Boolean).join(" · ") : "";
 	}

 	sourceLabel(font) {
-		const name = (font.fullName || font.name).normalize("NFKC").toLocaleLowerCase();
+		const name = (font.menuFamily || font.fullName || font.name).normalize("NFKC").toLocaleLowerCase();
 		if (this.names.get(name) < 2) return "";
 		return font.embedded ? "内嵌" : font.file || ["stored", "upload"].includes(font.source) ? "上传" : "系统";
 	}

 	show(query = "", load = true) {
 		if (this.input.disabled) return;
+		this.query = query;
 		const normalize = value => value.normalize("NFKC").toLocaleLowerCase().replace(/\s+/g, " ").trim();
 		const terms = normalize(query).split(" ").filter(Boolean);
-		this.matches = this.fonts.map((font, index) => ({ font, index })).filter(({ font }) => {
-			const name = normalize([font.fullName, font.name, font.family, font.style, font.postscriptName, ...(font.names || [])].filter(Boolean).join(" "));
+		this.matches = this.groups.map(group => {
+			const index = group.find(index => !this.fonts[index].bold && !this.fonts[index].italic && !this.fonts[index].disabled) ?? group[0];
+			return { font: this.fonts[index], index, group };
+		}).filter(({ group }) => {
+			const name = normalize(group.flatMap(index => {
+				const font = this.fonts[index];
+				return [font.menuFamily, font.menuStyle, font.fullName, font.name, font.family, font.style, font.postscriptName, ...(font.names || [])];
+			}).filter(Boolean).join(" "));
 			return terms.every(term => name.includes(term));
 		});
 		this.list.replaceChildren();
@@ -70,7 +105,7 @@ export class FontPicker {
 			option.dataset.index = String(index);
 			option.setAttribute("data-disabled", String(Boolean(font.disabled)));
 			const name = document.createElement("span");
-			name.textContent = font.fullName || font.name;
+			name.textContent = font.menuFamily || font.fullName || font.name;
 			option.append(name);
 			const source = this.sourceLabel(font);
 			if (source) {
@@ -91,7 +126,7 @@ export class FontPicker {
 		if (!this.open) this.list.showPopover();
 		this.open = true;
 		this.position();
-		const selected = this.matches.findIndex(({ font, index }) => !font.disabled && String(index) === this.value);
+		const selected = this.matches.findIndex(({ font, group }) => !font.disabled && group.includes(Number(this.value)));
 		this.activate(selected < 0 ? this.matches.findIndex(({ font }) => !font.disabled) : selected);
 		if (load) this.onOpen?.();
 	}
@@ -119,16 +154,27 @@ export class FontPicker {
 		const changed = this.value !== String(index);
 		this.value = String(index);
 		this.close();
-		if (changed) return this.onChange();
+		if (changed) {
+			const task = this.changing = Promise.resolve(this.onChange());
+			return task.finally(() => { if (this.changing === task) this.changing = null; });
+		}
 	}

 	commitExact() {
 		const value = this.input.value.trim().toLocaleLowerCase();
 		const matches = font => font && !font.disabled
-			&& [font.fullName, font.name, font.postscriptName, ...(font.names || [])].some(name => name?.toLocaleLowerCase() === value);
+			&& [font.menuFamily, font.fullName, font.name, font.postscriptName, ...(font.names || [])].some(name => name?.toLocaleLowerCase() === value);
 		const selected = Number(this.value);
 		const index = matches(this.fonts[selected]) ? selected : this.fonts.findIndex(matches);
-		if (index >= 0) this.choose(index);
+		if (index >= 0) return this.choose(index);
+	}
+
+	prepareCommit(event) {
+		if (this.open && (!event || ![this.input, this.toggle, this.list].some(node => node.contains(event.target)))) {
+			this.commitExact();
+			this.close();
+		}
+		return this.changing;
 	}

 	close() {
@@ -137,7 +183,7 @@ export class FontPicker {
 	}

 	keyDown(event) {
-		if (event.isComposing) return;
+		if (event.isComposing || event.key === "Tab" && (event.ctrlKey || event.metaKey || event.altKey)) return;
 		if (!["Escape", "Enter", "ArrowDown", "ArrowUp", "Tab"].includes(event.key)) return;
 		event.stopPropagation();
 		if (event.key === "Escape") {
@@ -314,13 +360,44 @@ export class FontManager {
 		}), ...this.catalog];
 	}

-	async loadFaces(inspect) {
-		while (true) {
+	async loadFaces(inspect, current = () => true) {
+		while (current()) {
 			const file = this.userFonts.find(font => font.enabled && !font.faces);
-			if (!file) return;
+			if (!file) break;
 			try { file.faces = await inspect(await this.read(file)); }
-			catch { file.faces = []; }
+			catch { if (!current()) return; file.faces = []; }
 		}
+		const pending = this.catalog.filter(font => font.blob && !font.menuFamily && !font.metadataFailed);
+		await Promise.all(Array.from({ length: Math.min(4, pending.length) }, async () => {
+			while (current() && pending.length) {
+				const font = pending.shift();
+				try {
+					const faces = await inspect(await this.read(font));
+					const face = faces.find(face => face.postscriptName === font.postscriptName);
+					if (face) Object.assign(font, { index: face.index, menuFamily: face.menuFamily, menuStyle: face.menuStyle, familyKey: face.familyKey, bold: face.bold, italic: face.italic, names: face.names });
+					else font.metadataFailed = true;
+				} catch { if (current()) font.metadataFailed = true; }
+			}
+		}));
+	}
+
+	async defaultFont(order, inspect, current = () => true) {
+		const fonts = this.editorFonts().filter(font => !font.disabled);
+		if (!fonts.length) return;
+		const families = [["DengXian", "等线"], ["Microsoft YaHei", "微软雅黑"], ["PingFang SC", "苹方-简", "苹方 简体"],
+			["Noto Sans SC", "Noto Sans CJK SC"], ["Source Han Sans SC", "Source Han Sans CN", "思源黑体", "思源黑体 CN"]];
+		const indices = await order(fonts, families);
+		let fallback = fonts.length;
+		for (const index of indices) {
+			if (!current()) return;
+			try {
+				await inspect(fonts[index], "中文汉字编辑水印，。！？");
+				if (current()) return fonts[index];
+			} catch (error) {
+				if (error.missingGlyphs) fallback = Math.min(fallback, index);
+			}
+		}
+		if (current()) return fonts[fallback];
 	}

 	async add(fonts) {
@@ -1,19 +1,545 @@
 let engineModule = null;
+let engineScheduler = null;
+let engineSequence = 0;
+const engineRuntimes = new Map();

-export function createEngineWorker() {
+function requestKey(worker, data) {
+	return worker.shared ? JSON.stringify([data.engineID, data.id]) : data.id;
+}
+
+export function engineLimits() {
+	engineScheduler ||= new BrowserScheduler();
+	return {parallelism: engineScheduler.capacity, memoryBytes: engineScheduler.budget};
+}
+
+class BrowserScheduler {
+	constructor() {
+		this.budget = Math.max(256, Math.min(2048, (navigator.deviceMemory || 2) * 256)) * 1024 * 1024;
+		this.capacity = Math.max(1, Math.min((navigator.hardwareConcurrency || 2) - 1, Math.floor(this.budget / (128 << 20))));
+		this.limit = Math.min(this.capacity, Math.max(1, Math.floor(this.budget / (512 << 20))));
+		this.workers = new Set();
+		this.queue = [];
+		this.sequence = 0;
+	}
+
+	get memory() {
+		return [...this.workers].reduce((total, worker) => total + Math.max(worker.memory, worker.reservation), 0);
+	}
+
+	active() {
+		return [...this.workers].reduce((total, worker) => total + new Set([...worker.operations.values()].map(data => data.engineID)).size, 0);
+	}
+
+	owner(worker, data) {
+		return worker.shared ? worker.sessions.get(data.engineID) : worker;
+	}
+
+	priority(task) {
+		return Number(task.worker.batch || this.owner(task.worker, task.data)?.foreground === false) + Number(!!task.data.preload || !!task.data.background);
+	}
+
+	submit(worker, data, transfer) {
+		if (data.preload && this.owner(worker, data)?.pagesPaused) {
+			worker.receive({data:{engineID:data.engineID, id:data.id, ok:false, canceled:true, error:"预加载已暂停"}});
+			return;
+		}
+		this.queue.push({worker, data, transfer, queued:performance.now(), order:++this.sequence});
+		this.drain();
+	}
+
+	send(task) {
+		const {worker, data, transfer} = task;
+		worker.requests.set(requestKey(worker, data), performance.now());
+		worker.operations.set(requestKey(worker, data), data);
+		try { worker.worker.postMessage(data, transfer); }
+		catch (error) {
+			worker.requests.delete(requestKey(worker, data));
+			worker.operations.delete(requestKey(worker, data));
+			worker.receive({data:{engineID:data.engineID, id:data.id, ok:false, error:error.message}});
+		}
+	}
+
+	complete(worker, data) {
+		if (data.memory) worker.memory = data.memory;
+		if (data.id == null || data.type) return;
+		const key = requestKey(worker, data);
+		const started = worker.requests.get(key);
+		const elapsed = data.elapsed ?? (started === undefined ? 0 : performance.now() - started);
+		const operation = worker.operations.get(key), owner = this.owner(worker, data);
+		if (worker.primary && started !== undefined && data.ok && owner) {
+			if (operation?.name === "ofdgoOpen") owner.openTime = elapsed;
+			if (operation?.name === "ofdgoRenderPage") owner.pageTime = owner.pageTime ? owner.pageTime * 0.75 + elapsed * 0.25 : elapsed;
+		}
+		worker.requests.delete(key);
+		worker.operations.delete(key);
+		if (this.memory > this.budget) this.limit = Math.max(1, this.limit - 1);
+		else if (started !== undefined && data.ok && elapsed > 100 && this.memory + Math.max(128 << 20, worker.memory) < this.budget) this.limit = Math.min(this.capacity, this.limit + 1);
+	}
+
+	drain() {
+		if (this.draining) return;
+		this.draining = true;
+		try {
+			if (this.queue.length) for (const worker of [...this.workers].sort((a,b) => b.memory-a.memory)) {
+				if (this.memory + (64 << 20) <= this.budget) break;
+				if (!worker.requests.size) worker.reclaim?.();
+			}
+			this.queue.sort((a, b) => this.priority(a) - this.priority(b) + (a.queued - b.queued) / 2000);
+			for (let i = 0; i < this.queue.length;) {
+				const task = this.queue[i];
+				if (task.worker.closed) { this.queue.splice(i, 1); continue; }
+				if (this.queue.some(previous => previous.worker === task.worker && previous.data.engineID === task.data.engineID && previous.order < task.order)) { i++; continue; }
+				const busy = [...task.worker.operations.values()].some(data => data.engineID === task.data.engineID && data.name !== "ofdgoSaveSnapshot");
+				const snapshot = task.data.name === "ofdgoSaveSnapshot" && [...task.worker.operations.values()].some(data => data.engineID === task.data.engineID && data.name === "ofdgoSaveSnapshot");
+				const active = this.active();
+				const interactive = task.worker.primary && this.owner(task.worker, task.data)?.foreground === true && !task.data.preload && !task.data.background;
+				const foregroundActive = [...this.workers].some(worker => [...worker.operations.values()].some(data => data.name !== "ofdgoSaveSnapshot" && worker.primary && this.owner(worker, data)?.foreground === true && !data.preload && !data.background));
+				const continuing = task.worker.primary && [...task.worker.operations.values()].some(data => data.engineID === task.data.engineID);
+				const available = continuing || active < this.limit || interactive && !foregroundActive && active < this.limit + 1;
+				if (busy || snapshot || !available || !task.worker.primary && active && this.memory + (64 << 20) > this.budget) { i++; continue; }
+				this.queue.splice(i, 1);
+				this.send(task);
+			}
+		} finally { this.draining = false; }
+	}
+
+	cancel(worker, data) {
+		const index = this.queue.findIndex(task => task.worker === worker && requestKey(worker, task.data) === requestKey(worker, data));
+		if (index < 0) return false;
+		const task = this.queue.splice(index, 1)[0];
+		worker.receive({data:{engineID:task.data.engineID, id:data.id, ok:false, canceled:true, error:"操作已取消"}});
+		this.drain();
+		return true;
+	}
+
+	pause(worker, engineID) {
+		const paused = this.queue.filter(task => task.worker === worker && task.data.engineID === engineID && task.data.preload);
+		this.queue = this.queue.filter(task => !paused.includes(task));
+		for (const task of paused) worker.receive({data:{engineID, id:task.data.id, ok:false, canceled:true, error:"预加载已暂停"}});
+	}
+
+	remove(worker) {
+		this.workers.delete(worker);
+		this.queue = this.queue.filter(task => task.worker !== worker);
+		worker.requests.clear();
+		worker.operations.clear();
+		this.drain();
+	}
+}
+
+class BrowserWorker {
+	constructor(options) {
+		engineScheduler ||= new BrowserScheduler();
+		this.primary = !!options.primary;
+		this.shared = !!options.shared;
+		this.engineID = this.shared ? null : `engine-${++engineSequence}`;
+		this.sessions = new Map();
+		this.closingSessions = new Set();
+		this.batch = !options.primary && !options.page;
+		this.requests = new Map();
+		this.operations = new Map();
+		this.foreground = !this.batch;
+		this.pagesPaused = false;
+		this.memory = 64 << 20;
+		this.reservation = 0;
+		this.closed = false;
+		this.url = String(options.url || "./ofdgo_wasm.js");
+		this.worker = new Worker(this.url);
+		engineScheduler.workers.add(this);
+		this.worker.onmessage = event => {
+			if (this.closed || event.data.type === "module") return;
+			engineScheduler.complete(this, event.data);
+			if (event.data.type === "exit" && (!this.shared || !event.data.engineID)) this.terminate();
+			try { this.receive(event); }
+			finally { engineScheduler.drain(); }
+		};
+		this.worker.onerror = event => { this.terminate(); this.fail("onerror", event); };
+		this.worker.onmessageerror = event => { this.terminate(); this.fail("onmessageerror", event); };
+		this.worker.addEventListener("message", event => {
+			if (event.data.type !== "module") return;
+			event.stopImmediatePropagation();
+			engineModule ||= WebAssembly.compileStreaming(fetch("./ofdgo.wasm")).catch(error => { engineModule = null; throw error; });
+			engineModule.then(module => { if (!this.closed) this.worker.postMessage({ type:"module", module }); }, error => { if (!this.closed) this.worker.postMessage({ type:"module", error:error.message }); });
+		});
+		if (!this.shared) this.worker.postMessage({type:"open", engineID:this.engineID});
+	}
+
+	receive(event) {
+		if (!event.data.engineID && !["progress", "exit"].includes(event.data.type)) return;
+		if (!this.shared) {
+			if (event.data.engineID && event.data.engineID !== this.engineID) return;
+			this.onmessage?.(event);
+			return;
+		}
+		if (event.data.type === "closed") {
+			if (!this.closingSessions.delete(event.data.engineID)) return;
+			for (const [key, data] of this.operations) if (data.engineID === event.data.engineID) {
+				this.requests.delete(key);
+				this.operations.delete(key);
+			}
+			if (!this.sessions.size && !this.closingSessions.size) this.terminate();
+			return;
+		}
+		const targets = event.data.engineID ? [this.sessions.get(event.data.engineID)] : [...this.sessions.values()];
+		for (const session of targets) session?.receive(event);
+	}
+
+	fail(name, event) {
+		if (!this.shared) { this[name]?.(event); return; }
+		for (const session of [...this.sessions.values()]) {
+			session.terminate();
+			session[name]?.(event);
+		}
+	}
+
+	postMessage(data, transfer) {
+		if (this.closed) throw new DOMException("引擎已关闭", "AbortError");
+		if (!this.shared) data = {...data, engineID:this.engineID};
+		if (data.type) {
+			if (data.type === "cancel" && engineScheduler.cancel(this, data)) return;
+			this.worker.postMessage(data, transfer);
+		} else engineScheduler.submit(this, data, transfer);
+	}
+
+	setForeground(foreground) {
+		this.foreground = !!foreground;
+		this.pausePages(!this.foreground);
+	}
+
+	pausePages(paused = true) {
+		this.pagesPaused = !!paused;
+		if (this.pagesPaused) engineScheduler.pause(this, this.engineID);
+		engineScheduler.drain();
+	}
+
+	terminate() {
+		if (this.closed) return;
+		this.closed = true;
+		if (engineRuntimes.get(this.url) === this) engineRuntimes.delete(this.url);
+		this.closingSessions.clear();
+		this.worker.terminate();
+		engineScheduler.remove(this);
+	}
+}
+
+class BrowserSession {
+	constructor(options) {
+		const url = String(options.url || "./ofdgo_wasm.js");
+		let runtime = engineRuntimes.get(url);
+		if (!runtime || runtime.closed) {
+			runtime = new BrowserWorker({primary:true, shared:true, url});
+			engineRuntimes.set(url, runtime);
+		}
+		this.runtime = runtime;
+		this.engineID = `engine-${++engineSequence}`;
+		this.requests = new Set();
+		this.foreground = true;
+		this.pagesPaused = false;
+		this.closed = false;
+		runtime.sessions.set(this.engineID, this);
+		runtime.postMessage({type:"open", engineID:this.engineID});
+	}
+
+	receive(event) {
+		if (this.closed) return;
+		if (event.data.id != null && !event.data.type) this.requests.delete(event.data.id);
+		if (event.data.type === "exit") this.terminate();
+		this.onmessage?.(event);
+	}
+
+	postMessage(data, transfer) {
+		if (this.closed) throw new DOMException("引擎已关闭", "AbortError");
+		if (!data.type) this.requests.add(data.id);
+		this.runtime.postMessage({...data, engineID:this.engineID}, transfer);
+	}
+
+	setForeground(foreground) {
+		this.foreground = !!foreground;
+		this.pausePages(!this.foreground);
+	}
+
+	pausePages(paused = true) {
+		this.pagesPaused = !!paused;
+		if (this.pagesPaused) engineScheduler.pause(this.runtime, this.engineID);
+		engineScheduler.drain();
+	}
+
+	terminate() {
+		if (this.closed) return;
+		this.closed = true;
+		this.runtime.sessions.delete(this.engineID);
+		engineScheduler.queue = engineScheduler.queue.filter(task => task.worker !== this.runtime || task.data.engineID !== this.engineID);
+		this.requests.clear();
+		if (!this.runtime.closed) {
+			this.runtime.closingSessions.add(this.engineID);
+			this.runtime.postMessage({type:"close", engineID:this.engineID});
+		}
+		engineScheduler.drain();
+	}
+}
+
+export function createEngineWorker(options = {}) {
 	if (nativeHost) return nativeHost.worker();
-	const worker = new Worker("./ofdgo_wasm.js");
-	worker.addEventListener("message", event => {
-		if (event.data.type !== "module") return;
-		event.stopImmediatePropagation();
-		engineModule ||= WebAssembly.compileStreaming(fetch("./ofdgo.wasm")).catch(error => { engineModule = null; throw error; });
-		engineModule.then(module => worker.postMessage({ type: "module", module }), error => worker.postMessage({ type: "module", error: error.message }));
-	});
-	return worker;
+	if (options.page || options.batch) return new BrowserWorker(options);
+	if (options.primary) return new BrowserSession(options);
+	return new BrowserEngine(options);
 }

 export async function documentBytes(file) {
-	return file?.nativeFile ? file : new Uint8Array(await file.arrayBuffer());
+	if (file?.nativeFile) return file;
+	if (file instanceof Blob) return new Response(file.stream()).blob();
+	return new Uint8Array(await file.arrayBuffer());
+}
+
+class BrowserEngine {
+	constructor(options) {
+		this.primary = createEngineWorker({primary:true, url:options.url});
+		this.engineID = this.primary.engineID;
+		this.workerURL = options.url;
+		this.primary.onmessage = event => {
+			const data = event.data;
+			if (data.memory) this.memory = data.memory;
+			if (this.source) this.parallelism = engineScheduler.limit;
+			const rendered = data.id != null && !data.type && this.requests.delete(data.id);
+			this.onmessage?.(event);
+			if (rendered && data.ok) this.dispatchPages();
+		};
+		this.primary.onerror = event => this.onerror?.(event);
+		this.primary.onmessageerror = event => this.onmessageerror?.(event);
+		this.requests = new Map();
+		this.fontRequests = new Map();
+		this.primaryPages = new Set();
+		this.slots = new Set();
+		this.sequence = 0;
+		this.revision = 0;
+		this.memory = 0;
+		this.parallelism = 1;
+		this.budget = engineScheduler.budget;
+		this.closed = false;
+		this.source = null;
+		this.pageSource = null;
+		this.foreground = true;
+		this.pagesPaused = false;
+	}
+
+	configurePages(source) {
+		const current = this.pageSource;
+		const fonts = (source?.fonts || []).map(font => font?.data !== undefined ? {name:font.name, data:font.data} : font);
+		const sameNames = JSON.stringify(source?.fontNames || []) === JSON.stringify(current?.fontNames || []);
+		const sameFonts = current && fonts.length === current.fonts.length && fonts.every((font, index) => font === current.fonts[index] || font?.data !== undefined && font.name === current.fonts[index]?.name && font.data === current.fonts[index]?.data);
+		if (source && current && source.file === current.file && !!source.pdf === !!current.pdf && (source.document || 0) === current.document && (source.version || "") === current.version && source.annotations === current.annotations && source.revision === current.revision && sameFonts && sameNames) return;
+		this.invalidatePages();
+		if (!source || this.closed) return;
+		this.pageSource = {...source, fonts, document:source.document || 0, version:source.version || ""};
+		this.source = {...source, file: source.file instanceof Blob ? source.file : new Blob([source.file])};
+		this.parallelism = engineScheduler.limit;
+	}
+
+	setForeground(foreground) {
+		this.foreground = !!foreground;
+		this.primary.setForeground(this.foreground);
+		for (const slot of this.slots) slot.worker.setForeground(this.foreground);
+		this.pausePages(!this.foreground);
+	}
+
+	pausePages(paused = true) {
+		this.pagesPaused = !!paused;
+		this.primary.pausePages(this.pagesPaused);
+		for (const slot of this.slots) slot.worker.pausePages(this.pagesPaused);
+	}
+
+	invalidatePages() {
+		this.revision++;
+		this.primaryPages.clear();
+		this.source = null;
+		this.pageSource = null;
+		this.parallelism = 1;
+		this.startupTime = 0;
+		this.primary.pageTime = 0;
+		for (const slot of this.slots) this.closeSlot(slot);
+	}
+
+	closeSlot(slot, error = new DOMException("页面加载已取消", "AbortError")) {
+		if (!this.slots.delete(slot)) return;
+		slot.worker.terminate();
+		for (const [id, request] of this.fontRequests) if (request.worker === slot.worker) this.fontRequests.delete(id);
+		slot.rejectReady(error);
+		for (const pending of slot.pending.values()) pending.reject(error);
+		slot.pending.clear();
+	}
+
+	createSlot(source) {
+		const started = performance.now();
+		const worker = createEngineWorker({page:true, url:this.workerURL});
+		worker.setForeground(this.foreground);
+		worker.pausePages(this.pagesPaused);
+		const slot = {worker, pending: new Map(), busy: false, memory: Math.max(128 << 20, this.memory), pages:new Set(), lastPage:0};
+		worker.reservation = slot.memory;
+		worker.reclaim = () => { if (!slot.busy) this.closeSlot(slot); };
+		const ready = new Promise((resolve, reject) => {
+			slot.rejectReady = reject;
+			worker.onmessage = ({data}) => {
+				if (data.memory) slot.memory = data.memory;
+				if (this.source) this.parallelism = engineScheduler.limit;
+				if (data.type === "ready") { resolve(); return; }
+				if (data.type === "exit") { this.closeSlot(slot, new Error("页面加载失败")); return; }
+				if (data.type === "font") {
+					const request = `${slot.worker.engineID}:${data.request}`;
+					this.fontRequests.set(request, {worker:slot.worker, request:data.request});
+					this.onmessage?.({data:{...data, id:slot.requestID, request}});
+					return;
+				}
+				if (data.type) return;
+				const request = slot.pending.get(data.id);
+				if (!request) return;
+				slot.pending.delete(data.id);
+				if (data.ok) request.resolve(data);
+				else request.reject(Object.assign(new Error(data.error), {code:data.code, name:data.canceled ? "AbortError" : "Error"}));
+			};
+			worker.onerror = worker.onmessageerror = () => this.closeSlot(slot, new Error("页面加载失败"));
+		});
+		this.slots.add(slot);
+		slot.ready = ready.then(async () => {
+			let opened = source.pdf
+				? await this.callSlot(slot, "ofdgoOpenPDF", [source.file, source.fonts, null, source.annotations, source.fontNames])
+				: await this.callSlot(slot, "ofdgoOpen", [source.file, source.fonts, source.annotations]);
+			if ((source.document || 0) !== (opened.data.documentIndex || 0)) opened = await this.callSlot(slot, "ofdgoSelectDocument", [source.document]);
+			if ((source.version || "") !== (opened.data.documentVersion || "")) await this.callSlot(slot, "ofdgoSelectVersion", [source.version || ""]);
+			if (this.slots.has(slot)) this.startupTime = performance.now() - started;
+		});
+		slot.ready.catch(() => {});
+		return slot;
+	}
+
+	callSlot(slot, name, args, preload = false) {
+		return new Promise((resolve, reject) => {
+			if (!this.slots.has(slot)) { reject(new DOMException("页面加载已取消", "AbortError")); return; }
+			const id = --this.sequence;
+			slot.pending.set(id, {resolve, reject});
+			try { slot.worker.postMessage({id, name, args, preload}); }
+			catch (error) { slot.pending.delete(id); reject(error); }
+		});
+	}
+
+	pageSlot(data) {
+		if (this.primaryPages.has(data.args[0])) return null;
+		const preferred = [...this.slots].find(slot => !slot.busy && slot.pages.has(data.args[0]));
+		const pending = [...this.requests.values()].filter(slot => slot === null).length - Number(this.requests.has(data.id));
+		if (!preferred && pending <= 0) return null;
+		let slot = preferred || [...this.slots].filter(slot => !slot.busy).sort((a,b) => Math.abs(a.lastPage-data.args[0])-Math.abs(b.lastPage-data.args[0]))[0];
+		const worthwhile = (this.primary.pageTime || 0) * pending >= Math.max(50, this.startupTime || this.primary.openTime || 0);
+		if (!slot && worthwhile && this.foreground && !this.pagesPaused && this.slots.size < this.parallelism - 1
+			&& engineScheduler.memory + Math.max(128 << 20, this.memory) <= this.budget) slot = this.createSlot(this.source);
+		return slot;
+	}
+
+	dispatchPages() {
+		if (this.closed || !this.source || !this.foreground || this.pagesPaused) return;
+		const draining = engineScheduler.draining;
+		engineScheduler.draining = true;
+		try {
+			const queued = engineScheduler.queue.filter(task => task.worker === this.primary.runtime && task.data.engineID === this.engineID).sort((a,b) => a.order-b.order);
+			for (const task of queued) {
+				if (task.data.name !== "ofdgoRenderPage") break;
+				if (this.requests.get(task.data.id) !== null) continue;
+				let slot;
+				try { slot = this.pageSlot(task.data); } catch { break; }
+				if (!slot) break;
+				engineScheduler.queue.splice(engineScheduler.queue.indexOf(task), 1);
+				this.primary.requests.delete(task.data.id);
+				this.renderSlot(slot, task.data, task.transfer);
+			}
+		} finally { engineScheduler.draining = draining; }
+	}
+
+	postMessage(data, transfer) {
+		if (this.closed) return;
+		if (data.type === "font" && typeof data.request === "string") {
+			const request = this.fontRequests.get(data.request);
+			if (request) {
+				this.fontRequests.delete(data.request);
+				request.worker.postMessage({...data, request:request.request}, transfer);
+			}
+			return;
+		}
+		if (!data.type && data.preload && this.pagesPaused) {
+			this.onmessage?.({data:{engineID:this.engineID, id:data.id, ok:false, canceled:true, error:"预加载已暂停"}});
+			return;
+		}
+		if (data.type === "cancel") {
+			const slot = this.requests.get(data.id);
+			if (slot && slot !== this.primary) this.closeSlot(slot);
+			else this.primary.postMessage(data);
+			return;
+		}
+		if (!data.type && data.name !== "ofdgoRenderPage" && ![
+			"ofdgoLoadPDF", "ofdgoDocumentInfo", "ofdgoDocumentVersions", "ofdgoDocumentNavigation", "ofdgoOpenLinks", "ofdgoOutlineLinks", "ofdgoRenderBackends", "ofdgoSVGFontData",
+			"ofdgoSearchPage", "ofdgoPageTextString", "ofdgoResources", "ofdgoResourceReferences", "ofdgoResourceTargets",
+			"ofdgoResourceLocations", "ofdgoFontPreview", "ofdgoFontFaces", "ofdgoFontFace", "ofdgoMatchFontFiles",
+			"ofdgoImages", "ofdgoStructureTargets", "ofdgoStructureObjects", "ofdgoPackageDocuments", "ofdgoVerifySignatures",
+			"ofdgoAnnotationInfos", "ofdgoInvoices", "ofdgoInvoice", "ofdgoExportInvoice", "ofdgoValidateInvoice",
+			"ofdgoActionList", "ofdgoPageSettings", "ofdgoReadAnnotation", "ofdgoPreviewSignatureSeal",
+			"ofdgoExportFormats", "ofdgoOutputFormats", "ofdgoParsePageRange", "ofdgoExportPage", "ofdgoExportDocument",
+			"ofdgoPreparePrint", "ofdgoLayoutPrint", "ofdgoPrintSide", "ofdgoPrintPDF", "ofdgoDiscardPrint",
+			"ofdgoExportAttachment", "ofdgoExportResource", "ofdgoExportMedia", "ofdgoExportVersion"
+		].includes(data.name)) this.invalidatePages();
+		const slot = data.name === "ofdgoRenderPage" && this.source ? this.pageSlot(data) : null;
+		if (!slot) {
+			if (data.name === "ofdgoRenderPage") this.requests.set(data.id, null);
+			this.primary.postMessage(data, transfer);
+			return;
+		}
+		this.renderSlot(slot, data, transfer);
+	}
+
+	renderSlot(slot, data, transfer) {
+		slot.busy = true;
+		slot.requestID = data.id;
+		this.requests.set(data.id, slot);
+		const revision = this.revision;
+		let fallback = false;
+		slot.ready.then(() => this.callSlot(slot, data.name, data.args, !!data.preload)).then(result => {
+			if (revision !== this.revision) throw new DOMException("页面加载已取消", "AbortError");
+			if (this.source.pdf && ((JSON.parse(result.data.annotations || "null") || []).length || result.data.links?.length)) {
+				this.primaryPages.add(data.args[0]);
+				this.requests.set(data.id, this.primary);
+				fallback = true;
+				this.primary.postMessage(data, transfer);
+				return;
+			}
+			slot.lastPage = data.args[0];
+			slot.pages.delete(slot.lastPage);
+			slot.pages.add(slot.lastPage);
+			if (slot.pages.size > 16) slot.pages.delete(slot.pages.values().next().value);
+			if (!this.closed) this.onmessage?.({data: {...result, engineID:this.engineID, id: data.id}});
+		}).catch(error => {
+			if (!this.closed && revision === this.revision && error.name !== "AbortError") {
+				this.closeSlot(slot, error);
+				this.parallelism = Math.max(1, this.slots.size + 1);
+				this.requests.set(data.id, this.primary);
+				fallback = true;
+				this.primary.postMessage(data, transfer);
+				return;
+			}
+			if (!this.closed) this.onmessage?.({data: {engineID:this.engineID, id: data.id, ok: false, error: error.message, canceled: error.name === "AbortError"}});
+		}).finally(() => {
+			if (!fallback) this.requests.delete(data.id);
+			slot.busy = false;
+			slot.worker.reservation = 0;
+			const memory = engineScheduler.memory;
+			if (memory > this.budget) { this.closeSlot(slot); this.parallelism = Math.max(1, this.slots.size + 1); }
+			this.dispatchPages();
+			engineScheduler.drain();
+		});
+	}
+
+	terminate() {
+		if (this.closed) return;
+		this.closed = true;
+		this.invalidatePages();
+		this.primary.terminate();
+		this.requests.clear();
+	}
 }

 export function saveFilePicker(options) {
@@ -87,6 +613,10 @@ class NativeHandle {
 class NativeHost {
 	constructor(bridge) {
 		this.bridge = bridge;
+		this.parallelism = 1;
+		this.cacheBytes = 32 * 1024 * 1024;
+		this.reading = 0;
+		this.readQueue = [];
 		this.resources = typeof FinalizationRegistry === "function" ? new FinalizationRegistry(file => {
 			this.call("release", {file}).catch(() => {});
 		}) : null;
@@ -96,25 +626,40 @@ class NativeHost {
 		return this.bridge.call(`ofdgo.host.${name}`, value, {signal});
 	}

-	async decode(value, name = "", key = "", signal) {
-		if (value?.nativeFile) {
-			const file = new NativeFile(value);
-			if (key === "file" || name === "ofdgoConvertPDF" && key === "bytes") return file;
-			try {
-				const bytes = await file.arrayBuffer(signal);
-				return key === "blob" ? new Blob([bytes], {type:value.type}) : new Uint8Array(bytes);
-			} finally {
-				await this.call("release", {file:value.nativeFile});
+	async readResource(file, signal) {
+		if (this.reading >= this.parallelism) await new Promise(resolve => this.readQueue.push(resolve));
+		else this.reading++;
+		try {
+			signal?.throwIfAborted();
+			return await file.arrayBuffer(signal);
+		} finally {
+			try { await this.call("release", {file:file.nativeFile}); }
+			finally {
+				const next = this.readQueue.shift();
+				if (next) next();
+				else this.reading--;
 			}
 		}
-		if (Array.isArray(value)) {
-			for (let i = 0; i < value.length; i++) value[i] = await this.decode(value[i], name, "", signal);
-			return value;
-		}
-		if (value && typeof value === "object") {
-			for (const [field, item] of Object.entries(value)) value[field] = await this.decode(item, name, field, signal);
-			return value;
-		}
+	}
+
+	async decode(value, signal) {
+		const reads = [];
+		const visit = (item, field, replace) => {
+			if (!item || typeof item !== "object" || item instanceof Blob || item instanceof ArrayBuffer || ArrayBuffer.isView(item)) return;
+			if (item.nativeFile) {
+				const file = new NativeFile(item);
+				if (field === "file") replace(file);
+				else reads.push(this.readResource(file, signal).then(bytes => replace(field === "blob" ? new Blob([bytes], {type:item.type}) : new Uint8Array(bytes))));
+				return;
+			}
+			for (const [child, content] of Object.entries(item)) {
+				if (content && typeof content === "object") visit(content, Array.isArray(item) ? "" : child, result => item[child] = result);
+			}
+		};
+		visit(value, "", result => value = result);
+		const results = await Promise.allSettled(reads);
+		const failed = results.find(result => result.status === "rejected");
+		if (failed) throw failed.reason;
 		return value;
 	}

@@ -134,21 +679,38 @@ class NativeHost {
 		let closed = false;
 		let unsubscribe;
 		let pending = Promise.resolve();
+		let termination = null;
+		const readers = new Set();
+		const inputs = new Set();
 		const requests = new Map();
 		const completions = new Map();
 		const emit = data => {
 			if (data.type === "result") { completions.get(data.id)?.(data.result); return; }
-			if (!closed) worker.onmessage?.({data});
+			if (!closed) worker.onmessage?.({data:{...data, engineID:worker.engineID}});
 		};
-		const ready = host.call("engine.open", {}).then(({engine}) => {
+		const ready = host.call("engine.open", {}).then(({engine, parallelism, cacheBytes}) => {
+			worker.engineID = engine;
 			if (closed) return engine;
+			host.parallelism = Math.max(1, parallelism || 1);
+			host.cacheBytes = cacheBytes || host.cacheBytes;
 			unsubscribe = host.bridge.on(`ofdgo.engine.${engine}`, emit);
 			emit({type:"ready"});
 			return engine;
 		}).catch(error => { if (!closed) worker.onerror?.({message:error.message}); throw error; });
 		const worker = {
+			engineID:null,
+			foreground:true,
+			pagesPaused:false,
 			onmessage:null,
 			onerror:null,
+			configurePages() {},
+			setForeground(foreground) {
+				worker.foreground = !!foreground;
+				worker.pausePages(!worker.foreground);
+			},
+			pausePages(paused = true) {
+				worker.pagesPaused = !!paused;
+			},
 			postMessage(data) {
 				if (closed) return;
 				if (data.type === "cancel") {
@@ -156,11 +718,18 @@ class NativeHost {
 					return;
 				}
 				if (data.type === "font") return;
+				if (["ofdgoDetectFormat", "ofdgoOpen", "ofdgoOpenPDF"].includes(data.name)) {
+					const input = data.args?.[0];
+					if (input?.nativeFile && !input.temporary) inputs.add(input.nativeFile);
+				}
 				const controller = new AbortController();
 				requests.set(data.id, controller);
-				const operation = pending.then(async () => {
+				const parallel = data.name === "ofdgoRenderPage";
+				const barrier = parallel ? pending : Promise.all([pending, ...readers]);
+				const operation = barrier.then(async () => {
 					const engine = await ready;
 					if (closed) return;
+					if (data.preload && worker.pagesPaused) throw new DOMException("预加载已暂停", "AbortError");
 					controller.signal.throwIfAborted();
 					const args = {engine, id:data.id, name:data.name, args:data.args};
 					let result;
@@ -182,24 +751,30 @@ class NativeHost {
 					let decoded;
 					try {
 						controller.signal.throwIfAborted();
-						decoded = await host.decode(result, data.name, "", controller.signal);
+						decoded = await host.decode(result, controller.signal);
 						controller.signal.throwIfAborted();
 					}
 					catch (error) { await host.release(result); throw error; }
 					if (closed) { await host.release(result); return; }
 					emit({id:data.id, ...decoded});
 				}).catch(error => emit({id:data.id, ok:false, error:error.message, code:error.code, canceled:error.name === "AbortError"})).finally(() => requests.delete(data.id));
-				if (data.name !== "ofdgoSaveSnapshot") pending = operation;
+				if (parallel) {
+					readers.add(operation);
+					operation.finally(() => readers.delete(operation));
+				} else if (data.name !== "ofdgoSaveSnapshot") pending = operation;
 			},
 			terminate() {
-				if (closed) return;
+				if (closed) return termination;
 				closed = true;
 				for (const controller of requests.values()) controller.abort();
-				ready.then(engine => host.call("engine.close", {engine})).catch(() => {}).finally(() => {
+				termination = ready.then(engine => host.call("engine.close", {engine})).catch(() => {}).finally(async () => {
 					unsubscribe?.();
 					for (const resolve of completions.values()) resolve({ok:false, canceled:true, error:"会话已关闭"});
 					completions.clear();
+					await Promise.all([...inputs].map(file => host.call("release", {file}).catch(() => {})));
+					inputs.clear();
 				});
+				return termination;
 			},
 		};
 		ready.catch(() => {});
@@ -219,13 +794,27 @@ class NativeHost {
 	}

 	async start(onFiles, onError) {
-		this.bridge.on("ofdgo.files", values => onFiles(values.map(value => new NativeFile(value))));
+		let launching = Promise.resolve();
+		this.bridge.on("ofdgo.launch", values => {
+			launching = launching.then(async () => {
+				try { await onFiles(values.map(value => new NativeFile(value)), true); }
+				finally { await this.call("launch.done", {}); }
+			}).catch(onError);
+		});
+		this.bridge.on("ofdgo.files", async values => {
+			try { await onFiles(values.map(value => new NativeFile(value))); }
+			catch (error) { onError(error); }
+		});
 		this.bridge.on("ofdgo.error", message => onError(new Error(message)));
 		const title = document.querySelector("title");
 		if (title) new MutationObserver(() => this.call("title", {title:document.title}).catch(onError)).observe(title, {childList:true});
 		await this.call("ready", {});
 	}

+	async discardFiles(files) {
+		await Promise.all(files.filter(file => file.drop && file.nativeFile).map(file => this.call("drop.release", {file:file.nativeFile})));
+	}
+
 	installFileInputs(onError) {
 		document.addEventListener("click", async event => {
 			const input = event.target;
@@ -0,0 +1,493 @@
+let printQueue = Promise.resolve();
+
+export class PrintDialog {
+	constructor(options) {
+		Object.assign(this, options);
+		const panel = this.panel || document.querySelector("#printPanel");
+		this.el = Object.fromEntries(["Panel", "Form", "Settings", "Printer", "Properties", "Copies", "Collation", "Duplex", "BackReverse", "BackRotate", "Contents", "Scope", "Range", "Parity", "Reverse", "Mode", "Paper", "Width", "Height", "Orientation", "Scaling", "Scale", "MarginTop", "MarginRight", "MarginBottom", "MarginLeft", "Grid", "PageOrder", "Gap", "Binding", "BookletSheets", "SheetFrom", "SheetTo", "Overlap", "Sides", "Rotate", "Grayscale", "Borders", "CropMarks", "Raster", "DPI", "DPIValue", "TileOnlyLarge", "Labels", "Preview", "Previous", "Next", "PreviewNumber", "PageControl", "PageCount", "Status", "Spinner", "ProgressTrack", "ProgressBar", "Cancel", "Submit"].map(name => [name, name === "Panel" ? panel : panel.querySelector(`#print${name}`)]));
+		this.printerOptions = this.el.Printer.innerHTML;
+		this.paperOptions = this.el.Paper.innerHTML;
+		this.settings = new WeakMap();
+		this.queue = Promise.resolve();
+		this.sequence = 0;
+		this.urls = [];
+		this.el.Settings.addEventListener("input", event => { if (event.target === this.el.Printer) this.choosePrinter(); else this.schedule(); });
+		this.el.Properties.addEventListener("click", () => this.properties());
+		this.el.Form.addEventListener("submit", event => { event.preventDefault(); this.print(); });
+		this.el.Cancel.addEventListener("click", () => this.el.Panel.close());
+		this.el.Panel.addEventListener("close", () => this.close());
+		this.el.Panel.addEventListener("cancel", event => { if (this.waiting) event.preventDefault(); });
+		this.el.Previous.addEventListener("click", () => this.preview(this.side - 1));
+		this.el.Next.addEventListener("click", () => this.preview(this.side + 1));
+		this.el.PreviewNumber.addEventListener("change", () => this.preview(Number(this.el.PreviewNumber.value) - 1));
+		this.el.PreviewNumber.addEventListener("keydown", event => {
+			if (event.key !== "Enter") return;
+			event.preventDefault();
+			if (!event.repeat) this.el.PreviewNumber.dispatchEvent(new Event("change"));
+		});
+		this.observer = new ResizeObserver(([entry]) => { this.previewSize = entry.contentRect; this.resize(); });
+		this.observer.observe(this.el.Preview);
+		this.afterPrint = () => { if (this.waiting === "browser") this.finishPrint("打印窗口已关闭"); };
+		this.beforePrint = () => {
+			if (!this.context || !this.el.Panel.open) return;
+			const root = document.querySelector("#ofdgoPrintDocument");
+			if (!root?.children.length) {
+				this.root = root || this.createRoot();
+				this.root.textContent = "请先在OFDGo中打开打印预览，准备完整文档后打印。";
+			}
+		};
+		window.addEventListener("afterprint", this.afterPrint);
+		window.addEventListener("beforeprint", this.beforePrint);
+	}
+
+	open(context) {
+		if (this.context) return;
+		const saved = this.settings.get(context.tab)?.get(context.document);
+		this.context = context;
+		this.restoring = true;
+		this.prepared = false;
+		this.layout = null;
+		this.job = this.profile = null;
+		this.side = 0;
+		this.sequence++;
+		this.el.Printer.innerHTML = this.printerOptions;
+		this.el.Paper.innerHTML = this.paperOptions;
+		this.el.Form.reset();
+		this.orientation = saved?.orientation ?? this.el.Orientation.value;
+		this.duplexBeforeBooklet = saved?.duplex ?? this.el.Duplex.value;
+		this.scalingBeforeBooklet = saved?.scaling ?? this.el.Scaling.value;
+		this.restore(saved);
+		this.mode = this.el.Mode.value;
+		if (!saved) this.el.Scope.value = context.selection.length ? "selected" : "all";
+		this.el.Scope.querySelector('option[value="selected"]').disabled = !context.selection.length;
+		this.el.Sides.value = this.manual() ? "front" : "all";
+		if (!saved) this.el.Contents.value = context.annotations ? "documentAndAnnotations" : "document";
+		this.status();
+		this.el.Preview.replaceChildren();
+		this.show(this.el.Panel);
+		this.loadDevices(saved);
+	}
+
+	isDevice() { return this.el.Printer.value.startsWith("device:"); }
+	manual() { return this.el.Duplex.value.startsWith("manual"); }
+
+	async loadDevices(saved) {
+		const sequence = ++this.sequence;
+		const selected = saved?.values.Printer;
+		this.loading = true;
+		this.controls();
+		const browser = this.el.Printer.querySelector('option[value="browser"]');
+		browser.disabled = !!this.nativeHost || typeof window.print !== "function";
+		if (browser.disabled) this.el.Printer.value = "pdf";
+		try {
+			if (this.nativeHost) {
+				this.status("正在读取设备", true);
+				const capabilities = await this.nativeHost.call("print.capabilities", {});
+				if (!this.current(sequence)) return;
+				this.capabilities = capabilities;
+				browser.disabled = !capabilities.systemDialog;
+				const printers = capabilities.direct ? await this.nativeHost.call("print.printers", {}) : [];
+				if (!this.current(sequence)) return;
+				for (const printer of printers) this.el.Printer.add(new Option(printer.name, `device:${printer.name}`));
+				const printer = printers.find(printer => printer.default) || printers[0];
+				this.el.Printer.value = printer ? `device:${printer.name}` : "pdf";
+			}
+		} catch (error) { if (this.current(sequence)) this.status(error.message); }
+		finally {
+			if (this.current(sequence)) {
+				this.loading = false;
+				if ([...this.el.Printer.options].some(option => option.value === selected && !option.disabled)) this.el.Printer.value = selected;
+				await this.choosePrinter(this.el.Printer.value === selected ? saved : null);
+			}
+		}
+	}
+
+	async choosePrinter(saved) {
+		const sequence = ++this.sequence;
+		const paper = this.el.Paper.value;
+		this.layout = this.job = this.profile = null;
+		this.loading = true;
+		this.status();
+		this.controls();
+		if (!this.isDevice()) {
+			this.el.Paper.innerHTML = this.paperOptions;
+			this.el.Paper.value = paper;
+			if (!this.el.Paper.value) {
+				const [width, height] = paper.split(",").map(Number);
+				if (width > 0 && height > 0 && Number.isFinite(width) && Number.isFinite(height)) {
+					this.el.Paper.value = "custom";
+					this.el.Width.value = width;
+					this.el.Height.value = height;
+				} else this.el.Paper.value = "210,297";
+			}
+		}
+		this.el.Properties.hidden = true;
+		try {
+			if (this.isDevice()) {
+				this.status("正在读取纸张", true);
+				const profile = await this.nativeHost.call("print.query", {printer:this.el.Printer.value.slice(7), copies:1, duplex:"simplex"});
+				if (!this.current(sequence)) return;
+				this.profile = profile;
+				this.el.Paper.replaceChildren(...profile.papers.map(paper => new Option(paper.name, `${paper.width},${paper.height}`)));
+				if (profile.customPaper) this.el.Paper.add(new Option("自定义", "custom"));
+				this.el.Paper.value = `${profile.options.width},${profile.options.height}`;
+				if (!this.el.Paper.value && profile.customPaper) { this.el.Paper.value = "custom"; this.el.Width.value = profile.options.width; this.el.Height.value = profile.options.height; }
+				if (!this.el.Paper.value) throw new Error("设备默认纸张不在支持列表中");
+				this.el.Orientation.value = profile.options.orientation;
+				this.el.Copies.max = Math.min(999, profile.maxCopies || 999);
+				this.el.Copies.value = 1;
+				this.el.Grayscale.checked = profile.options.color === "grayscale";
+				this.el.Grayscale.disabled = !profile.color;
+				this.el.Properties.hidden = !profile.properties;
+			} else this.el.Grayscale.disabled = false;
+		} catch (error) { if (this.current(sequence)) { this.status(error.message); return; } }
+		finally { if (this.current(sequence)) { this.loading = false; this.controls(); } }
+		if (this.current(sequence)) {
+			this.restore(saved);
+			if (this.el.Scope.value === "selected" && !this.context.selection.length) this.el.Scope.value = "all";
+			this.restoring = false;
+			this.schedule();
+		}
+	}
+
+	async properties() {
+		if (!this.isDevice() || this.running || this.loading) return;
+		const sequence = this.sequence;
+		this.loading = true;
+		this.status("正在打开属性", true);
+		this.controls();
+		try { await this.nativeHost.call("print.properties", {printer:this.el.Printer.value.slice(7)}); }
+		catch (error) { if (this.current(sequence)) this.status(error.message); }
+		finally { if (this.current(sequence)) { this.loading = false; await this.choosePrinter(); } }
+	}
+
+	deviceOptions() {
+		const [width, height] = this.el.Paper.value === "custom" ? [Number(this.el.Width.value), Number(this.el.Height.value)] : this.el.Paper.value.split(",").map(Number);
+		const manual = this.manual(), partial = this.el.Sides.value !== "all";
+		return {printer:this.el.Printer.value.slice(7), width, height, orientation:this.el.Orientation.value,
+			copies:Number(this.el.Copies.value), collation:this.el.Collation.checked ? "collated" : "uncollated",
+			duplex:manual || partial ? "simplex" : this.el.Duplex.value, color:this.el.Grayscale.checked ? "grayscale" : "color",
+			scale:1, pagesPerSide:1, margins:{top:0,right:0,bottom:0,left:0},
+			...(this.capabilities?.backgrounds ? {backgrounds:true} : {}), ...(this.capabilities?.headersFooters ? {headersFooters:false} : {})};
+	}
+
+	options(profile) {
+		const el = this.el;
+		const number = name => {
+			const value = Number(el[name].value);
+			if (!el[name].value.trim() || !Number.isFinite(value)) throw new Error("请输入有效数值");
+			return value;
+		};
+		let [paperWidth, paperHeight] = el.Paper.value === "source" ? [0, 0] : el.Paper.value === "custom" ? [number("Width"), number("Height")] : el.Paper.value.split(",").map(Number);
+		if (el.Orientation.value === "landscape") [paperWidth, paperHeight] = [paperHeight, paperWidth];
+		if (profile) [paperWidth, paperHeight] = [profile.width, profile.height];
+		const scope = el.Scope.value;
+		const [rows, columns] = el.Grid.value.split(",").map(Number);
+		if (scope === "selected" && !this.context.selection.length) throw new Error("未选择页面");
+		if (scope === "range" && !el.Range.value.trim()) throw new Error("请输入页码范围");
+		const manual = this.manual(), duplex = el.Duplex.value.replace("manualL", "l").replace("manualS", "s");
+		if (manual && this.isDevice() && number("Copies") !== 1) throw new Error("手动双面每次仅支持1份");
+		return {
+			...(scope === "current" ? {pages:[this.context.page]} : scope === "selected" ? {pages:this.context.selection} : scope === "range" ? {pageRange:el.Range.value.trim()} : {}),
+			mode:el.Mode.value, scaling:el.Scaling.value, paperWidth, paperHeight,
+			margins:{top:number("MarginTop"), right:number("MarginRight"), bottom:number("MarginBottom"), left:number("MarginLeft")},
+			...(profile ? {printableArea:{x:profile.printableArea.x, y:profile.printableArea.y, w:profile.printableArea.width, h:profile.printableArea.height}} : {}),
+			copies:this.isDevice() ? number("Copies") : 1, collate:el.Collation.checked, duplex,
+			scale:el.Scale.disabled ? 1 : number("Scale") / 100, rotate:el.Rotate.checked, reverse:el.Reverse.checked !== (manual && el.Sides.value === "back" && el.BackReverse.checked), parity:el.Parity.value, sides:el.Sides.value,
+			backRotate:manual && el.BackRotate.checked,
+			rows, columns, pageOrder:el.PageOrder.value, gap:el.Gap.disabled ? 0 : number("Gap"), binding:el.Binding.value, bookletSheets:!el.BookletSheets.disabled && el.BookletSheets.value ? number("BookletSheets") : 0, overlap:el.Overlap.disabled ? 0 : number("Overlap"),
+			...(el.Mode.value === "booklet" ? {sheetFrom:el.SheetFrom.value ? number("SheetFrom") : 0, sheetTo:el.SheetTo.value ? number("SheetTo") : 0} : {}),
+			contents:el.Contents.value, grayscale:el.Grayscale.checked, borders:el.Borders.checked, cropMarks:el.CropMarks.checked, raster:el.Raster.checked, dpi:number("DPI"), tileOnlyLarge:el.TileOnlyLarge.checked, labels:el.Labels.checked
+		};
+	}
+
+	schedule() {
+		const el = this.el, mode = el.Mode.value;
+		const source = el.Paper.querySelector('option[value="source"]');
+		if (source) source.disabled = mode !== "single";
+		if (mode !== "single" && el.Paper.value === "source") el.Paper.value = "210,297";
+		if (mode === "booklet" && this.mode !== "booklet") {
+			this.orientation = el.Orientation.value;
+			this.duplexBeforeBooklet = el.Duplex.value;
+			this.scalingBeforeBooklet = el.Scaling.value;
+			el.Scaling.value = "shrink";
+			el.Duplex.value = this.isDevice() && !this.profile?.duplex ? "manualShortEdge" : "shortEdge";
+		} else if (mode !== "booklet" && this.mode === "booklet") {
+			el.Orientation.value = this.orientation;
+			el.Duplex.value = this.duplexBeforeBooklet;
+			el.Scaling.value = this.scalingBeforeBooklet;
+		}
+		if (mode === "booklet") el.Orientation.value = "landscape";
+		this.mode = mode;
+		if (this.isDevice() && !this.profile?.duplex && ["longEdge", "shortEdge"].includes(el.Duplex.value)) el.Duplex.value = el.Duplex.value === "longEdge" ? "manualLongEdge" : "manualShortEdge";
+		if (mode === "booklet" && el.Duplex.value === "simplex") el.Duplex.value = this.isDevice() && !this.profile?.duplex ? "manualShortEdge" : "shortEdge";
+		if (el.Duplex.value === "simplex") el.Sides.value = "all";
+		const isManual = this.manual();
+		el.Sides.querySelector('option[value="all"]').disabled = isManual;
+		if (isManual && el.Sides.value === "all") el.Sides.value = "front";
+		for (const option of el.Duplex.options) option.disabled = this.isDevice() && !this.profile?.duplex && ["longEdge", "shortEdge"].includes(option.value) || mode === "booklet" && ["simplex", "longEdge", "manualLongEdge"].includes(option.value);
+		el.Orientation.disabled = mode === "booklet" || el.Paper.value === "source";
+		const rows = {device:this.isDevice(), sides:el.Duplex.value !== "simplex", manual:isManual, range:el.Scope.value === "range", paper:el.Paper.value === "custom", scale:el.Scaling.value === "custom" || mode === "poster", multiple:mode === "multiple", gap:mode === "multiple" || mode === "booklet", booklet:mode === "booklet", poster:mode === "poster"};
+		for (const row of el.Panel.querySelectorAll("[data-print-row]")) {
+			row.hidden = !rows[row.dataset.printRow];
+			for (const input of row.querySelectorAll("input, select")) input.disabled = row.hidden;
+		}
+		el.Scaling.disabled = mode === "poster" || mode === "booklet";
+		el.DPI.disabled = !el.Raster.checked && !el.Grayscale.checked;
+		const sequence = ++this.sequence;
+		this.layout = null;
+		this.job = null;
+		this.status();
+		this.controls();
+		clearTimeout(this.timer);
+		this.timer = setTimeout(() => {
+			this.queue = this.queue.catch(() => {}).then(() => this.refresh(sequence));
+		}, 160);
+	}
+
+	async refresh(sequence) {
+		if (!this.current(sequence)) return;
+		const context = this.context;
+		try {
+			if (!this.el.Form.checkValidity()) {
+				if (this.el.Panel.open) this.el.Form.reportValidity();
+				else this.status("请检查打印设置");
+				return;
+			}
+			this.status("正在准备预览", true);
+			const deviceOptions = this.isDevice() ? this.deviceOptions() : null;
+			const profile = deviceOptions ? await this.nativeHost.call("print.query", deviceOptions) : null;
+			if (!this.current(sequence)) return;
+			this.profile = profile;
+			const options = this.options(profile);
+			const layout = await context.call(this.prepared ? "ofdgoLayoutPrint" : "ofdgoPreparePrint", options);
+			if (!this.current(sequence)) return;
+			this.prepared = true;
+			this.layout = layout;
+			if (this.isDevice()) this.el.Copies.max = Math.min(999, this.profile.maxCopies || 999, layout.copiesLimit > 0 ? layout.copiesLimit : 999);
+			await this.preview(Math.min(this.side, layout.sides.length - 1));
+			if (!this.current(sequence) || this.layout !== layout) return;
+			this.job = {deviceOptions, fingerprint:profile?.fingerprint, manual:this.manual(), sides:options.sides, backContent:layout.backContent};
+			this.status();
+			if (layout.sides.some(side => side.placements.some(placement => placement.clipped))) this.status("内容超出可打印区域");
+			if (this.manual() && options.sides === "back" && !layout.backContent) this.status("背面为空白");
+		} catch (error) {
+			if (this.current(sequence)) this.status(error.code === "printDenied" ? "文档禁止打印" : error.message);
+		} finally {
+			if (this.current(sequence)) this.controls();
+		}
+	}
+
+	current(sequence = this.sequence) { return sequence === this.sequence && this.context && !this.context.tab.closed; }
+
+	async preview(index) {
+		if (!this.layout || this.running) return;
+		if (!Number.isInteger(index) || index < 0 || index >= this.layout.sides.length) { this.controls(); return; }
+		const sequence = this.sequence, preview = this.previewSequence = (this.previewSequence || 0) + 1;
+		this.side = index;
+		this.controls();
+		try {
+			let {svg} = await this.context.call("ofdgoPrintSide", index);
+			if (!this.current(sequence) || preview !== this.previewSequence) return;
+			if (this.profile) {
+				const area = this.profile.printableArea;
+				svg = svg.replace("</svg>", `<rect x="${area.x}" y="${area.y}" width="${area.width}" height="${area.height}" fill="none" stroke="#88949e" stroke-width="0.2" stroke-dasharray="1 1"/></svg>`);
+			}
+			const url = URL.createObjectURL(new Blob([svg], {type:"image/svg+xml"}));
+			const img = new Image();
+			img.src = url;
+			try { await img.decode(); } catch (error) { URL.revokeObjectURL(url); throw error; }
+			if (!this.current(sequence) || preview !== this.previewSequence) { URL.revokeObjectURL(url); return; }
+			if (this.previewURL) URL.revokeObjectURL(this.previewURL);
+			this.previewURL = url;
+			this.el.Preview.replaceChildren(img);
+			this.resize();
+		} catch (error) { if (this.current(sequence) && preview === this.previewSequence) { this.status(error.message); this.layout = null; this.controls(); } }
+	}
+
+	resize() {
+		const img = this.el.Preview.querySelector("img"), side = this.layout?.sides[this.side];
+		if (!img || !side || !this.previewSize) return;
+		const factor = Math.min(this.previewSize.width / side.width, this.previewSize.height / side.height);
+		img.style.width = `${Math.max(1, side.width * factor)}px`;
+		img.style.height = `${Math.max(1, side.height * factor)}px`;
+	}
+
+	status(text = "", busy = false, completed = 0, total = 0) {
+		this.el.Status.textContent = total ? `${text} · ${completed} / ${total}` : text;
+		this.el.Spinner.hidden = !busy;
+		this.el.ProgressTrack.hidden = !busy || !total;
+		this.el.ProgressBar.style.width = `${total ? completed / total * 100 : 0}%`;
+	}
+
+	controls() {
+		const count = this.layout?.sides.length || 0, busy = !!this.running || !!this.loading;
+		this.el.DPIValue.textContent = this.el.DPI.value;
+		this.el.Settings.disabled = busy;
+		this.el.Submit.disabled = !count || !this.job || busy;
+		if (this.el.Printer.value !== "pdf" && this.manual() && this.el.Sides.value === "back" && !this.layout?.backContent) this.el.Submit.disabled = true;
+		this.el.Previous.disabled = busy || !count || this.side === 0;
+		this.el.Next.disabled = busy || !count || this.side + 1 === count;
+		this.el.PreviewNumber.disabled = busy || !count;
+		this.el.PreviewNumber.max = count || 1;
+		this.el.PreviewNumber.value = count ? this.side + 1 : 1;
+		this.el.PageCount.textContent = String(count);
+		this.el.PageControl.style.setProperty("--page-width", `${String(count || 1).length + 0.5}ch`);
+		this.el.Cancel.textContent = busy && !this.waiting ? "取消" : "关闭";
+		this.el.Cancel.disabled = !!this.waiting;
+	}
+
+	restore(saved) {
+		for (const [name, value] of Object.entries(saved?.values || {})) {
+			if (name === "Printer") continue;
+			const node = this.el[name];
+			if (node.type === "checkbox") node.checked = value;
+			else if (!node.options || [...node.options].some(option => option.value === value)) node.value = value;
+		}
+	}
+
+	remember() {
+		const context = this.context;
+		if (!context || this.restoring) return;
+		let settings = this.settings.get(context.tab);
+		if (!settings) this.settings.set(context.tab, settings = new Map());
+		const values = {};
+		for (const [name, node] of Object.entries(this.el)) if (node.closest("#printSettings") && name !== "Sides" && node.matches("input, select")) values[name] = node.type === "checkbox" ? node.checked : node.value;
+		settings.set(context.document, {values, orientation:this.orientation, duplex:this.duplexBeforeBooklet, scaling:this.scalingBeforeBooklet});
+	}
+
+	createRoot() {
+		const root = document.createElement("div");
+		root.id = "ofdgoPrintDocument";
+		document.body.append(root);
+		return root;
+	}
+
+	async print() {
+		if (!this.layout || !this.job || this.running) return;
+		this.previewSequence++;
+		if (this.el.Printer.value === "pdf") return this.pdf();
+		const sequence = this.sequence, context = this.context;
+		const job = this.job;
+		this.running = true;
+		this.controls();
+		this.status("正在等待打印", true);
+		const previous = printQueue;
+		let release;
+		printQueue = new Promise(resolve => { release = resolve; });
+		await previous;
+		if (!this.current(sequence)) { release(); return; }
+		this.releasePrint = release;
+		try {
+			this.root = document.querySelector("#ofdgoPrintDocument") || this.createRoot();
+			this.root.replaceChildren();
+			const style = document.createElement("style");
+			style.textContent = this.layout.sides.map((side, i) => `@page ofdgoPrint${i}{size:${side.width}mm ${side.height}mm;margin:0}`).join("");
+			this.root.append(style);
+			this.status("正在准备纸面", true, 0, this.layout.sides.length);
+			for (let i = 0; i < this.layout.sides.length; i++) {
+				if (!this.current(sequence)) throw new DOMException("打印已取消", "AbortError");
+				const {svg} = await context.call("ofdgoPrintSide", i);
+				if (!this.current(sequence)) throw new DOMException("打印已取消", "AbortError");
+				const url = URL.createObjectURL(new Blob([svg], {type:"image/svg+xml"}));
+				this.urls.push(url);
+				const img = new Image(), section = document.createElement("section"), side = this.layout.sides[i];
+				img.src = url;
+				section.append(img);
+				section.style.cssText = `page:ofdgoPrint${i};width:${side.width}mm;height:${side.height}mm`;
+				this.root.append(section);
+				await img.decode();
+				if (this.current(sequence)) this.status("正在准备纸面", true, i + 1, this.layout.sides.length);
+			}
+			await document.fonts.ready;
+			if (!this.current(sequence)) throw new DOMException("打印已取消", "AbortError");
+			if (this.el.Panel.open) {
+				this.previousTitle = document.title;
+				document.title = this.printTitle = context.name;
+			}
+			this.waiting = this.nativeHost ? "native" : "browser";
+			this.controls();
+			this.status(job.deviceOptions ? "正在提交打印" : "正在打开打印", true);
+			if (job.deviceOptions) {
+				const result = await this.nativeHost.call("print", {...job.deviceOptions, fingerprint:job.fingerprint});
+				this.finishPrint(result?.submitted ? "打印已提交" : "打印作业未被接受");
+				if (this.current(sequence) && result?.submitted && job.manual && job.sides === "front") {
+					if (job.backContent) { this.el.Sides.value = "back"; this.schedule(); }
+					else this.status("背面为空白");
+				}
+			} else if (this.nativeHost) {
+				const capabilities = await this.nativeHost.call("print.capabilities", {});
+				if (!this.current(sequence)) throw new DOMException("打印已取消", "AbortError");
+				if (!capabilities.systemDialog) throw new Error("当前运行时不支持系统打印");
+				if (!capabilities.dialogCompletion) this.waiting = "browser";
+				await this.nativeHost.call("print.dialog", {kind:"system"});
+				if (capabilities.dialogCompletion) this.finishPrint("打印窗口已关闭");
+			} else if (typeof window.print === "function") window.print();
+			else throw new Error("当前浏览器不支持打印");
+		} catch (error) {
+			if (this.releasePrint === release) this.finishPrint();
+			if (this.current(sequence)) {
+				this.status(error.name === "AbortError" ? "打印已取消" : error.message);
+			}
+		} finally {
+			if (this.current(sequence)) {
+				if (!this.waiting) this.running = false;
+				this.controls();
+			}
+		}
+	}
+
+	finishPrint(message = "") {
+		if (this.previousTitle !== undefined) {
+			if (document.title === this.printTitle) document.title = this.previousTitle;
+			delete this.previousTitle;
+		}
+		if (this.releasePrint) this.root?.replaceChildren();
+		for (const url of this.urls) URL.revokeObjectURL(url);
+		this.urls = [];
+		this.releasePrint?.();
+		this.releasePrint = null;
+		this.status(message);
+		this.waiting = this.running = false;
+		this.controls();
+		if (this.destroyed) window.removeEventListener("afterprint", this.afterPrint);
+	}
+
+	async pdf() {
+		if (!this.layout || this.running) return;
+		const sequence = this.sequence, context = this.context;
+		this.running = true;
+		this.controls();
+		this.status("正在生成文件", true);
+		try {
+			const result = await context.call("ofdgoPrintPDF");
+			if (this.current(sequence)) {
+				await this.download(result.bytes, "application/pdf", `${context.name.replace(/\.[^.]+$/, "")}-打印.pdf`);
+				if (this.current(sequence)) this.status("文件已生成");
+			}
+		} catch (error) { if (this.current(sequence)) this.status(error.message); }
+		finally { if (this.current(sequence)) { this.running = false; this.controls(); } }
+	}
+
+	close() {
+		const context = this.context;
+		this.remember();
+		this.sequence++;
+		clearTimeout(this.timer);
+		if (context) this.cancel(context.tab);
+		if (!this.waiting) this.finishPrint();
+		if (this.previewURL) URL.revokeObjectURL(this.previewURL);
+		this.previewURL = null;
+		this.el.Preview.replaceChildren();
+		this.context = null;
+		this.queue = this.queue.catch(() => {}).then(() => context?.call("ofdgoDiscardPrint").catch(() => {}));
+	}
+
+	destroy() {
+		this.destroyed = true;
+		this.close();
+		this.observer.disconnect();
+		window.removeEventListener("beforeprint", this.beforePrint);
+		if (!this.waiting) window.removeEventListener("afterprint", this.afterPrint);
+	}
+}
@@ -0,0 +1,324 @@
+export class DocumentDialogs {
+	constructor({ document: root = document, targets = [], titlebar = null } = {}) {
+		Object.assign(this, { document: root, targets, titlebar, owner: null, records: new Map(), tabs: new Map(), released: new WeakSet(), inert: new Map(), styles: new Map() });
+		this.backdrop = root.createElement("div");
+		this.backdrop.className = "document-dialog-backdrop";
+		this.backdrop.hidden = true;
+		Object.assign(this.backdrop.style, { position: "fixed", inset: "0", background: "rgb(31 36 40 / 18%)", zIndex: "1000" });
+		root.body.append(this.backdrop);
+		root.addEventListener("keydown", event => {
+			if (event.defaultPrevented || this.applicationOpen()) return;
+			const panel = this.current()?.stack.at(-1);
+			if (!panel) return;
+			if (event.key === "Tab" && !event.ctrlKey && !event.altKey && !event.metaKey) {
+				const selector = "button, input, select, textarea, a[href], [tabindex], [contenteditable=true]";
+				const elements = [this.titlebar, panel].filter(Boolean).flatMap(root => [...root.querySelectorAll(selector)])
+					.filter(node => node.tabIndex >= 0 && !node.disabled && !node.closest("[inert]") && node.getClientRects().length);
+				const index = elements.indexOf(root.activeElement), direction = event.shiftKey ? -1 : 1;
+				const target = index < 0 ? event.shiftKey ? elements.at(-1) : elements[0] : elements[(index + direction + elements.length) % elements.length];
+				event.preventDefault();
+				if (target) target.focus();
+				else panel.focus();
+				return;
+			}
+			if (event.key !== "Escape") return;
+			event.preventDefault();
+			event.stopPropagation();
+			this.cancel(panel);
+		}, true);
+		this.backdrop.addEventListener("pointerdown", event => { event.preventDefault(); this.focus(); });
+		root.defaultView.addEventListener("resize", () => this.paint());
+	}
+
+	register(panel, { shared = true, persistent = false } = {}) {
+		if (this.records.has(panel)) return panel;
+		const record = { show: panel.show.bind(panel), showModal: panel.showModal.bind(panel), close: panel.close.bind(panel), owner: null, application: false, shared, clicks: new WeakMap(), initial: shared && !persistent ? this.snapshot(panel) : null };
+		this.records.set(panel, record);
+		panel.showModal = panel.show = () => this.openFor(this.owner, panel);
+		panel.close = value => {
+			if (record.application) record.close(value);
+			else this.closeFor(this.owner, panel, value);
+		};
+		panel.requestClose = value => {
+			if (record.application) {
+				const event = new this.document.defaultView.Event("cancel", { cancelable: true });
+				if (panel.dispatchEvent(event)) record.close(value);
+			} else this.cancel(panel, value);
+		};
+		panel.addEventListener("close", () => {
+			if (record.application) { record.application = false; this.paint(); }
+		});
+		panel.addEventListener("click", event => { record.clicks.set(event, this.owner); }, true);
+		panel.addEventListener("click", event => {
+			if (!record.application && (record.clicks.get(event) !== this.owner || !this.current()?.stack.includes(panel))) event.preventDefault();
+		});
+		panel.addEventListener("submit", event => {
+			if (record.application || event.defaultPrevented) return;
+			const method = event.submitter?.getAttribute("formmethod") || event.target.getAttribute("method");
+			if (method?.toLowerCase() !== "dialog") return;
+			event.preventDefault();
+			this.closeFor(this.owner, panel, event.submitter?.value || "");
+		});
+		return panel;
+	}
+
+	current(tab = this.owner) {
+		return tab ? this.tabs.get(tab) : null;
+	}
+
+	entry(tab, panel) {
+		if (!tab || this.released.has(tab)) throw new Error("Document dialog owner is unavailable");
+		this.register(panel);
+		if (!this.tabs.has(tab)) this.tabs.set(tab, { entries: new Map(), stack: [] });
+		const entries = this.tabs.get(tab).entries;
+		if (!entries.has(panel)) entries.set(panel, { snapshot: this.records.get(panel).initial, setup: [], updates: [], resolve: null, promise: null });
+		return entries.get(panel);
+	}
+
+	setOwner(tab) {
+		if (this.owner === tab) return;
+		if (this.owner) this.suspend(this.owner);
+		if (tab) this.restore(tab);
+	}
+
+	openFor(tab, panel, setup) {
+		const entry = this.entry(tab, panel);
+		if (setup) entry.setup.push(setup);
+		const state = this.tabs.get(tab);
+		state.stack = state.stack.filter(value => value !== panel);
+		state.stack.push(panel);
+		if (tab !== this.owner) return panel;
+		this.unpaint();
+		this.records.get(panel).owner = tab;
+		this.prepare(entry, panel);
+		if (!this.records.get(panel).shared) this.document.body.append(panel);
+		if (!panel.open) this.records.get(panel).show();
+		this.paint();
+		this.focus();
+		return panel;
+	}
+
+	request(panel, tab = this.owner, setup) {
+		if (!tab || this.released.has(tab)) return Promise.resolve(null);
+		const entry = this.entry(tab, panel);
+		if (entry.promise) return entry.promise;
+		entry.promise = new Promise(resolve => { entry.resolve = resolve; });
+		const promise = entry.promise;
+		this.openFor(tab, panel, setup);
+		return promise;
+	}
+
+	updateFor(tab, panel, setup) {
+		if (!tab || this.released.has(tab)) return false;
+		const entry = this.current(tab)?.entries.get(panel);
+		if (!entry) return false;
+		if (tab === this.owner && this.records.get(panel).owner === tab) setup(panel);
+		else entry.updates.push(setup);
+		return true;
+	}
+
+	closeFor(tab, panel, value) {
+		const state = this.current(tab), entry = state?.entries.get(panel);
+		if (!state?.stack.includes(panel)) return;
+		const visible = tab === this.owner;
+		if (visible) {
+			this.unpaint();
+			if (value !== undefined) panel.returnValue = String(value);
+			panel.removeAttribute("open");
+			if (this.records.get(panel).initial) entry.snapshot = this.snapshot(panel);
+		}
+		const result = value === undefined ? visible ? panel.returnValue : entry.snapshot?.returnValue ?? panel.returnValue : String(value);
+		state.stack = state.stack.filter(value => value !== panel);
+		const resolve = entry.resolve;
+		entry.resolve = entry.promise = null;
+		entry.setup = [];
+		if (visible) {
+			this.paint();
+			panel.dispatchEvent(new this.document.defaultView.Event("close"));
+			this.focus();
+		}
+		resolve?.(result);
+	}
+
+	cancel(panel, value) {
+		const event = new this.document.defaultView.Event("cancel", { cancelable: true });
+		if (panel.dispatchEvent(event)) this.closeFor(this.owner, panel, value);
+	}
+
+	suspend(tab) {
+		if (tab !== this.owner) return;
+		this.unpaint();
+		for (const [panel, entry] of this.current(tab)?.entries || []) {
+			const record = this.records.get(panel);
+			if (record.application || record.owner !== tab) continue;
+			if (record.initial) entry.snapshot = this.snapshot(panel);
+			else if (!record.shared) {
+				entry.focus = panel.contains(this.document.activeElement) ? this.document.activeElement : null;
+				panel.remove();
+			}
+			panel.removeAttribute("open");
+		}
+		this.owner = null;
+		this.paint();
+	}
+
+	restore(tab) {
+		if (!tab || this.released.has(tab)) return false;
+		if (this.owner === tab) return true;
+		if (this.owner) this.suspend(this.owner);
+		if (!this.tabs.has(tab)) this.tabs.set(tab, { entries: new Map(), stack: [] });
+		this.owner = tab;
+		const state = this.current(tab);
+		for (const [panel, entry] of state.entries) {
+			const record = this.records.get(panel);
+			if (record.application) continue;
+			if (record.initial) this.applySnapshot(entry.snapshot, panel);
+			else if (!record.shared) this.document.body.append(panel);
+			record.owner = tab;
+		}
+		for (const [panel, entry] of state.entries) {
+			if (this.records.get(panel).application) continue;
+			for (const update of entry.updates.splice(0)) update(panel);
+		}
+		for (const panel of state.stack) {
+			this.prepare(state.entries.get(panel), panel);
+			if (!panel.open) this.records.get(panel).show();
+		}
+		this.paint();
+		this.focus(true);
+		return true;
+	}
+
+	release(tab) {
+		if (!tab || this.released.has(tab)) return;
+		const visible = this.owner === tab;
+		if (visible) this.suspend(tab);
+		const state = this.current(tab);
+		this.tabs.delete(tab);
+		this.released.add(tab);
+		for (const entry of state?.entries.values() || []) entry.resolve?.(null);
+		for (const [panel] of state?.entries || []) {
+			const record = this.records.get(panel);
+			if (!record.shared) {
+				panel.remove();
+				this.records.delete(panel);
+				continue;
+			}
+			if (record.application || record.owner !== tab) continue;
+			if (record.initial) this.applySnapshot(record.initial, panel);
+			record.owner = null;
+		}
+		state?.entries.clear();
+		if (state) state.stack.length = 0;
+	}
+
+	showApplication(panel) {
+		this.register(panel);
+		if ([...this.tabs.values()].some(state => state.stack.includes(panel))) throw new Error("Document dialog is already in use");
+		const record = this.records.get(panel);
+		record.application = true;
+		try { record.showModal(); }
+		catch (error) { record.application = false; throw error; }
+	}
+
+	applicationOpen() {
+		return [...this.records.values()].some(record => record.application);
+	}
+
+	prepare(entry, panel) {
+		for (const setup of entry.setup.splice(0)) setup(panel);
+	}
+
+	snapshot(panel) {
+		const nodes = [panel, ...panel.querySelectorAll("*")].map(node => ({ node,
+			children: [...node.childNodes], attributes: [...node.attributes].filter(attribute => node !== panel || attribute.name !== "open").map(attribute => [attribute.name, attribute.value]),
+			value: "value" in node && node.type !== "file" ? node.value : undefined,
+			checked: node.checked, indeterminate: node.indeterminate, selected: node.selected,
+			files: node.type === "file" ? [...node.files] : undefined, scrollTop: node.scrollTop, scrollLeft: node.scrollLeft,
+			selectionStart: node.selectionStart, selectionEnd: node.selectionEnd, selectionDirection: node.selectionDirection,
+			text: [...node.childNodes].filter(child => child.nodeType === 3).map(child => [child, child.data]) }));
+		const focus = panel.contains(this.document.activeElement) ? this.document.activeElement : null;
+		const range = this.document.getSelection();
+		const selection = !focus?.matches("input, textarea") && range?.anchorNode && panel.contains(range.anchorNode) && panel.contains(range.focusNode)
+			? { anchor: range.anchorNode, start: range.anchorOffset, focus: range.focusNode, end: range.focusOffset } : null;
+		return { nodes, focus, selection, returnValue: panel.returnValue };
+	}
+
+	applySnapshot(snapshot, panel) {
+		panel.removeAttribute("open");
+		for (const item of snapshot.nodes) {
+			const { node, children, attributes } = item;
+			if (node.childNodes.length !== children.length || children.some((child, index) => node.childNodes[index] !== child)) node.replaceChildren(...children);
+			for (const attribute of [...node.attributes]) if (!attributes.some(([name]) => name === attribute.name)) node.removeAttribute(attribute.name);
+			for (const [name, value] of attributes) if (node.getAttribute(name) !== value) node.setAttribute(name, value);
+			for (const [text, value] of item.text) text.data = value;
+		}
+		for (const item of snapshot.nodes) {
+			const { node } = item;
+			if (item.value !== undefined && node.tagName !== "SELECT") node.value = item.value;
+			for (const key of ["checked", "indeterminate", "selected"]) if (item[key] !== undefined) node[key] = item[key];
+			if (item.files !== undefined) {
+				const transfer = new this.document.defaultView.DataTransfer();
+				for (const file of item.files) transfer.items.add(file);
+				node.files = transfer.files;
+			}
+			if (item.selectionStart != null && typeof node.setSelectionRange === "function") node.setSelectionRange(item.selectionStart, item.selectionEnd, item.selectionDirection);
+			node.scrollTop = item.scrollTop;
+			node.scrollLeft = item.scrollLeft;
+		}
+		panel.returnValue = snapshot.returnValue;
+	}
+
+	unpaint() {
+		for (const [node, value] of this.inert) node.inert = value;
+		this.inert.clear();
+		for (const [panel, styles] of this.styles) for (const [name, [value, priority]] of styles) {
+			if (value) panel.style.setProperty(name, value, priority);
+			else panel.style.removeProperty(name);
+		}
+		this.styles.clear();
+	}
+
+	paint() {
+		this.unpaint();
+		const stack = this.current()?.stack || [];
+		const top = stack.at(-1);
+		this.backdrop.hidden = !top;
+		if (!top) return;
+		const inset = Math.max(0, this.titlebar?.getBoundingClientRect().bottom || 0);
+		this.backdrop.style.top = `${inset}px`;
+		this.backdrop.style.zIndex = String(1000 + (stack.length - 1) * 2);
+		const disable = node => {
+			if (!node || node === this.titlebar || node === this.backdrop || this.records.has(node)) return;
+			if (node.contains(this.titlebar) || [...this.records.keys()].some(panel => node.contains(panel))) {
+				for (const child of node.children) disable(child);
+				return;
+			}
+			if (!this.inert.has(node)) this.inert.set(node, node.inert);
+			node.inert = true;
+		};
+		for (const target of typeof this.targets === "function" ? this.targets() : this.targets) disable(target);
+		for (const [index, panel] of stack.entries()) {
+			if (panel !== top) { this.inert.set(panel, panel.inert); panel.inert = true; }
+			const values = { position: "fixed", inset: `${inset}px 0 0`, zIndex: String(1001 + index * 2), maxHeight: `calc(100dvh - ${inset + 24}px)`, "--dialog-inset": `${inset}px` };
+			const styles = new Map();
+			for (const [key, value] of Object.entries(values)) {
+				const name = key.replace(/[A-Z]/g, letter => `-${letter.toLowerCase()}`);
+				styles.set(name, [panel.style.getPropertyValue(name), panel.style.getPropertyPriority(name)]);
+				panel.style.setProperty(name, value);
+			}
+			this.styles.set(panel, styles);
+		}
+	}
+
+	focus(restore = false) {
+		const panel = this.current()?.stack.at(-1);
+		if (!panel || this.applicationOpen()) return;
+		const saved = restore ? this.current().entries.get(panel)?.snapshot?.focus || this.current().entries.get(panel)?.focus : null;
+		const target = saved?.isConnected && panel.contains(saved) ? saved : panel.querySelector("[autofocus], button:not(:disabled), input:not(:disabled), select:not(:disabled), textarea:not(:disabled), [tabindex]") || panel;
+		if (restore || !panel.contains(this.document.activeElement)) target.focus({ preventScroll: true });
+		const selection = restore && this.current().entries.get(panel)?.snapshot?.selection;
+		if (selection?.anchor?.isConnected && selection.focus?.isConnected) this.document.getSelection().setBaseAndExtent(selection.anchor, selection.start, selection.focus, selection.end);
+		if (restore) for (const item of this.current().entries.get(panel)?.snapshot?.nodes || []) { item.node.scrollTop = item.scrollTop; item.node.scrollLeft = item.scrollLeft; }
+	}
+}
@@ -1,12 +1,15 @@
 importScripts("./wasm_exec.js");

-let pending = Promise.resolve();
-const operations = new Map();
-const fontRequests = new Map();
+const engines = new Map();
+let resolveRuntime;
+let rejectRuntime;
+const runtimeReady = new Promise((resolve, reject) => { resolveRuntime = resolve; rejectRuntime = reject; });
+runtimeReady.catch(() => {});
 let fontSequence = 0;
 let engineMemory = null;

-function requestFont(id, signal, name, done) {
+function requestFont(engine, id, signal, name, done) {
+	const fontRequests = engine.fontRequests;
 	if (signal.aborted) { done(null, "", true); return; }
 	const request = ++fontSequence;
 	const cancel = () => {
@@ -18,7 +21,7 @@ function requestFont(id, signal, name, done) {
 		signal.removeEventListener("abort", cancel);
 		done(result.bytes, result.error || "", signal.aborted);
 	});
-	self.postMessage({ id, type: "font", request, name });
+	self.postMessage({ engineID: engine.id, id, type: "font", request, name });
 }
 self.onmessage = ({ data }) => {
 	if (data.type === "module") {
@@ -26,24 +29,71 @@ self.onmessage = ({ data }) => {
 		else loadWASM(data.module).catch(exitWASM);
 		return;
 	}
+	const engineID = data.engineID;
+	if (typeof engineID !== "string" || !engineID) {
+		self.postMessage({ engineID, id: data.id, ok: false, error: "missing engine ID" });
+		return;
+	}
+	if (data.type === "open") {
+		if (engines.has(engineID)) {
+			self.postMessage({ engineID, type: "exit", error: "engine already exists" });
+			return;
+		}
+		const engine = { id: engineID, operations: new Map(), fontRequests: new Map(), active: new Set(), closed: false };
+		engines.set(engineID, engine);
+		engine.pending = runtimeReady.then(async () => {
+			if (engine.closed) return;
+			const opened = JSON.parse(globalThis.ofdgoEngineOpen(engineID));
+			if (!opened.ok) throw new Error(opened.error);
+			const backends = JSON.parse(await globalThis.ofdgoEngineCall(engineID, "ofdgoRenderBackends", null));
+			if (!backends.ok) throw new Error(backends.error);
+			if (!engine.closed) self.postMessage({ engineID, type: "ready", backends: backends.data, memory: engineMemory.buffer.byteLength });
+		}).catch(error => {
+			engine.closed = true;
+			self.postMessage({ engineID, type: "exit", error: error.message });
+		});
+		return;
+	}
+	const engine = engines.get(engineID);
+	if (!engine && data.type === "close") {
+		self.postMessage({ engineID, type: "closed" });
+		return;
+	}
+	if (!engine || engine.closed && data.type !== "close") {
+		self.postMessage({ engineID, id: data.id, ok: false, error: "unknown or closed engine" });
+		return;
+	}
+	if (data.type === "close") {
+		engine.closed = true;
+		for (const operation of engine.operations.values()) operation.abort();
+		engine.pending.then(async () => {
+			await Promise.all([...engine.active]);
+			await runtimeReady;
+			globalThis.ofdgoEngineClose(engineID);
+			engines.delete(engineID);
+			self.postMessage({ engineID, type: "closed" });
+		}).catch(() => engines.delete(engineID));
+		return;
+	}
 	if (data.type === "font") {
-		fontRequests.get(data.request)?.(data);
-		fontRequests.delete(data.request);
+		engine.fontRequests.get(data.request)?.(data);
+		engine.fontRequests.delete(data.request);
 		return;
 	}
 	if (data.type === "cancel") {
-		operations.get(data.id)?.abort();
+		engine.operations.get(data.id)?.abort();
 		return;
 	}
-	if (["ofdgoResources", "ofdgoPrepareSave", "ofdgoSaveSnapshot"].includes(data.name)) operations.set(data.id, new AbortController());
-	if (data.name === "ofdgoSaveSnapshot") {
-		pending = pending.then(() => { void handleMessage(data); });
-		return;
-	}
-	if (data.name === "ofdgoImportDocuments" || data.name === "ofdgoImportImages" || data.name === "ofdgoExportImages" || data.name === "ofdgoConvertFile" || data.name === "ofdgoPackFiles" || data.name === "ofdgoConvertPDF" || data.name === "ofdgoExportPage" || data.name === "ofdgoExportDocument" || data.name === "ofdgoExportAttachment" || data.name === "ofdgoExportResource" || data.name === "ofdgoExportMedia" || data.name === "ofdgoExportVersion" || data.name === "ofdgoSaveDocument" || data.name === "ofdgoSaveSigned" || data.name === "ofdgoImportPages") {
-		operations.set(data.id, new AbortController());
-	}
-	pending = pending.then(() => data.name === "ofdgoConvertFile" || data.name === "ofdgoPackFiles" ? handleBatchMessage(data) : handleMessage(data));
+	engine.operations.set(data.id, new AbortController());
+	engine.pending = engine.pending.then(() => {
+		const operation = (data.name === "ofdgoConvertFile" || data.name === "ofdgoPackFiles" ? handleBatchMessage(engine, data) : handleMessage(engine, data)).catch(error => {
+			engine.operations.delete(data.id);
+			self.postMessage({ engineID, id: data.id, ok: false, error: error.message });
+		});
+		engine.active.add(operation);
+		operation.finally(() => engine.active.delete(operation));
+		if (data.name !== "ofdgoSaveSnapshot") return operation;
+	});
 };

 async function availableOutput(directory, base, format) {
@@ -59,7 +109,9 @@ async function availableOutput(directory, base, format) {
 	}
 }

-async function handleBatchMessage({ id, name, args }) {
+async function handleBatchMessage(engine, { id, name, args }) {
+	const operations = engine.operations;
+	const postMessage = (data, transfer) => self.postMessage({ ...data, engineID: engine.id }, transfer);
 	const signal = operations.get(id).signal;
 	const channel = new MessageChannel();
 	const finish = (done, err) => {
@@ -89,7 +141,7 @@ async function handleBatchMessage({ id, name, args }) {
 		if (name === "ofdgoConvertFile") {
 			const [file, options, fonts, destination] = args;
 			credentials = options.credentials;
-			const formats = JSON.parse(globalThis.ofdgoOutputFormats()).data;
+			const formats = JSON.parse(await globalThis.ofdgoEngineCall(engine.id, "ofdgoOutputFormats", null)).data;
 			const format = formats.find(item => item.value === options.format);
 			if (!format) throw new Error("不支持此格式");
 			root = destination;
@@ -100,7 +152,7 @@ async function handleBatchMessage({ id, name, args }) {
 				if (format.paged) directory = await root.getDirectoryHandle(target.name, { create: true });
 				else { await root.getFileHandle(target.name, { create: true }); directory = root; }
 				created = target.name;
-				self.postMessage({ id, type: "output", name: created });
+				postMessage({ id, type: "output", name: created });
 				return target;
 			}) : { stem: base, name: format.paged ? base : `${base}.${format.extension}` };
 			const boundary = async (action, pageName) => {
@@ -113,7 +165,7 @@ async function handleBatchMessage({ id, name, args }) {
 						const handle = await directory.getFileHandle(fileName, { create: true });
 						if (!format.paged) {
 							created = fileName;
-							self.postMessage({ id, type: "output", name: created });
+							postMessage({ id, type: "output", name: created });
 						}
 						current.handle = handle;
 						output = await handle.createWritable();
@@ -126,19 +178,19 @@ async function handleBatchMessage({ id, name, args }) {
 					chunks = [];
 				}
 			};
-			payload = await globalThis.ofdgoConvertFile(read(file), file.size, options, write,
+			payload = await globalThis.ofdgoEngineCall(engine.id, "ofdgoConvertFile", done => finish(done), read(file), file.size, options, write,
 				(phase, completed, total, done) => {
-					self.postMessage({ id, type: "conversion", phase, completed, total });
+					postMessage({ id, type: "conversion", phase, completed, total, memory: engineMemory.buffer.byteLength });
 					finish(done);
 				},
 				(action, pageName, done) => boundary(action, pageName).then(() => finish(done), err => finish(done, err)),
-				done => finish(done), fonts, (name, done) => requestFont(id, signal, name, done));
+				done => finish(done), fonts, (name, done) => requestFont(engine, id, signal, name, done));
 		} else {
 			const [entries, handle, compression] = args;
 			if (handle) output = await handle.createWritable();
-			payload = await globalThis.ofdgoPackFiles(entries.map(entry => ({ name: entry.name, size: entry.file.size })),
+			payload = await globalThis.ofdgoEngineCall(engine.id, "ofdgoPackFiles", done => finish(done), entries.map(entry => ({ name: entry.name, size: entry.file.size })),
 				index => read(entries[index].file), write,
-				(completed, total, done) => { self.postMessage({ id, type: "conversion", phase: "pack", completed, total }); finish(done); },
+				(completed, total, done) => { postMessage({ id, type: "conversion", phase: "pack", completed, total, memory: engineMemory.buffer.byteLength }); finish(done); },
 				done => finish(done), compression);
 		}
 		signal.throwIfAborted();
@@ -157,7 +209,7 @@ async function handleBatchMessage({ id, name, args }) {
 		}
 		result.data.size = size;
 		operations.delete(id);
-		self.postMessage({ id, ...result, memory: engineMemory.buffer.byteLength });
+		postMessage({ id, ...result, memory: engineMemory.buffer.byteLength });
 	} catch (err) {
 		await output?.abort().catch(() => {});
 		let message = signal.aborted ? "转换已取消" : err.message;
@@ -165,7 +217,7 @@ async function handleBatchMessage({ id, name, args }) {
 			try { await root.removeEntry(created, { recursive: true }); }
 			catch (cleanupError) { message += `；清理失败：${cleanupError.message}`; }
 		}
-		self.postMessage({ id, ok: false, error: message, code: err.code, canceled: signal.aborted, memory: engineMemory.buffer.byteLength });
+		postMessage({ id, ok: false, error: message, code: err.code, canceled: signal.aborted, memory: engineMemory.buffer.byteLength });
 	} finally {
 		credentials?.password?.fill(0);
 		credentials?.key?.fill(0);
@@ -175,21 +227,32 @@ async function handleBatchMessage({ id, name, args }) {
 		operations.delete(id);
 	}
 }
-async function handleMessage({ id, name, args }) {
+async function handleMessage(engine, { id, name, args }) {
+	const operations = engine.operations;
+	const postMessage = (data, transfer) => self.postMessage({ ...data, engineID: engine.id }, transfer);
 	let output;
 	let saveFile;
 	let saveStamp;
 	let channel;
 	const signal = operations.get(id)?.signal;
+	const cancellable = ["ofdgoPreparePrint", "ofdgoLayoutPrint", "ofdgoPrintSide", "ofdgoPrintPDF", "ofdgoResources", "ofdgoPrepareSave", "ofdgoSaveSnapshot", "ofdgoImportDocuments", "ofdgoImportImages", "ofdgoExportImages", "ofdgoOpenPDF", "ofdgoExportPage", "ofdgoExportDocument", "ofdgoExportAttachment", "ofdgoExportResource", "ofdgoExportMedia", "ofdgoExportVersion", "ofdgoSaveDocument", "ofdgoSaveSigned", "ofdgoImportPages"].includes(name);
 	const importing = name === "ofdgoImportPages" || name === "ofdgoImportImages" || name === "ofdgoImportDocuments";
-	const converting = name === "ofdgoConvertPDF";
+	const converting = name === "ofdgoOpenPDF";
 	const saving = name === "ofdgoSaveDocument" || name === "ofdgoSaveSnapshot" || name === "ofdgoSaveSigned";
-	const resources = name === "ofdgoResources" || name === "ofdgoPrepareSave";
+	const resources = ["ofdgoPreparePrint", "ofdgoLayoutPrint", "ofdgoPrintSide", "ofdgoPrintPDF", "ofdgoResources", "ofdgoPrepareSave"].includes(name);
+	if (engine.pdf) {
+		const checked = JSON.parse(await globalThis.ofdgoEngineCall(engine.id, "ofdgoCheckDocument", null, name));
+		if (!checked.ok) { postMessage({id, ...checked}); operations.delete(id); return; }
+	}
 	const key = name === "ofdgoOpen" ? args[3]?.key : name === "ofdgoSaveSigned" || name === "ofdgoLoadImport" ? args[1]?.key : null;
 	const keyPassword = name === "ofdgoOpen" ? args[3]?.keyPassword : name === "ofdgoSaveSigned" || name === "ofdgoLoadImport" ? args[1]?.keyPassword : null;
 	const password = converting ? args[2] : name === "ofdgoSetEncryption" ? args[0]?.password : name === "ofdgoOpen" ? args[3]?.password : name === "ofdgoLoadImport" ? args[1]?.password : null;
 	try {
 		signal?.throwIfAborted();
+		if (["ofdgoOpen", "ofdgoOpenPDF", "ofdgoLoadImport"].includes(name) && args[0] instanceof Blob) {
+			const file = args[0], reader = new FileReaderSync();
+			args[0] = {size: file.size, read: (offset, size) => new Uint8Array(reader.readAsArrayBuffer(file.slice(offset, offset + size)))};
+		}
 		if (name === "ofdgoDetectFormat") {
 			const file = args[0], reader = new FileReaderSync();
 			channel = new MessageChannel();
@@ -218,7 +281,7 @@ async function handleMessage({ id, name, args }) {
 		}
 		const chunks = [];
 		let size = 0;
-		if (signal) {
+		if (cancellable) {
 			channel = new MessageChannel();
 			const finish = (done, err, commit = false) => {
 				channel.port1.onmessage = () => {
@@ -231,10 +294,10 @@ async function handleMessage({ id, name, args }) {
 				args.push(done => finish(done));
 			} else if (importing || converting) {
 				args.push((phase, completed, total, done) => {
-					self.postMessage({ id, type: importing ? "import" : "conversion", phase, completed, total });
+					postMessage({ id, type: importing ? "import" : "conversion", phase, completed, total });
 					finish(done, null, importing && phase === "commit");
 				});
-				if (converting) args.push((name, done) => requestFont(id, signal, name, done));
+				if (converting) args.push((name, done) => requestFont(engine, id, signal, name, done));
 			} else {
 				const destination = args.pop();
 				const file = destination?.fileHandle || destination;
@@ -259,17 +322,17 @@ async function handleMessage({ id, name, args }) {
 				});
 				if (name === "ofdgoExportDocument") {
 					args.push((completed, total, done) => {
-						self.postMessage({ id, type: "export", stage: "pages", completed, total });
+						postMessage({ id, type: "export", stage: "pages", completed, total });
 						finish(done);
 					});
 				} else if (name === "ofdgoExportVersion") {
 					args.push((phase, completed, total, done) => {
-						self.postMessage({ id, type: "export", stage: "prepare", phase, completed, total });
+						postMessage({ id, type: "export", stage: "prepare", phase, completed, total });
 						finish(done);
 					}, done => finish(done));
 				} else if (saving) {
 					args.push((phase, completed, total, done) => {
-						self.postMessage({ id, type: "export", stage: "prepare", phase, completed, total });
+						postMessage({ id, type: "export", stage: "prepare", phase, completed, total });
 						finish(done);
 					});
 					if (compression || name === "ofdgoSaveSnapshot") args.push(indices, compression || {mode: 0}, done => finish(done));
@@ -278,12 +341,29 @@ async function handleMessage({ id, name, args }) {
 				if (!saving && args.some(value => value?.mode !== undefined)) args.push(done => finish(done));
 			}
 		}
-		const payload = await globalThis[name](...args);
+		if (engine.pdf && name !== "ofdgoOpenPDF") {
+			channel ||= new MessageChannel();
+			const context = await globalThis.ofdgoEngineCall(engine.id, "ofdgoPDFContext", null, (phase, completed, total, done) => {
+				postMessage({id, type: "conversion", phase, completed, total});
+				channel.port1.onmessage = () => done("", signal.aborted);
+				channel.port2.postMessage(null);
+			}, (name, done) => requestFont(engine, id, signal, name, done));
+			engine.pdf = JSON.parse(context).data === true;
+		}
+		const started = name === "ofdgoOpen" || name === "ofdgoRenderPage" ? performance.now() : null;
+		const payload = await globalThis.ofdgoEngineCall(engine.id, name, done => {
+			channel ||= new MessageChannel();
+			channel.port1.onmessage = () => done("", signal.aborted);
+			channel.port2.postMessage(null);
+		}, ...args);
 		signal?.throwIfAborted();
 		const result = typeof payload === "string" ? JSON.parse(payload) : payload;
-		if (signal && !importing && !converting && !resources && result.ok) {
+		if (result.ok && name === "ofdgoOpenPDF") engine.pdf = true;
+		if (result.ok && (name === "ofdgoOpen" || name === "ofdgoLoadPDF" && result.data.done)) engine.pdf = false;
+		if (started !== null && result.ok) result.elapsed = performance.now() - started;
+		if (cancellable && !importing && !converting && !resources && result.ok) {
 			result.data.size = size;
-			if (name !== "ofdgoExportMedia") self.postMessage({ id, type: "export", stage: "save" });
+			if (name !== "ofdgoExportMedia") postMessage({ id, type: "export", stage: "save" });
 			if (output) {
 				if (saveStamp) {
 					const current = await saveFile.getFile();
@@ -299,16 +379,16 @@ async function handleMessage({ id, name, args }) {
 			await output.abort();
 		}
 		output = null;
-		const transfer = result.data?.bytes ? [result.data.bytes.buffer] : (result.data?.images || []).map((image) => image.bytes.buffer);
-		self.postMessage({ id, ...result }, transfer);
+		const transfer = [...new Set([result.data?.bytes, ...(result.data?.images || []).map(image => image.bytes), ...(result.data?.fonts || []).map(font => font.data)].filter(bytes => bytes?.byteLength).map(bytes => bytes.buffer))];
+		postMessage({ id, ...result, memory: engineMemory.buffer.byteLength }, transfer);
 	} catch (err) {
 		await output?.abort().catch(() => {});
 		const result = { id, ok: false, error: err.message, errorName: err.name };
 		if (signal?.aborted) {
-			result.error = resources ? "查询已取消" : importing ? "导入已取消" : converting ? "转换已取消" : "导出已取消";
+			result.error = resources ? "查询已取消" : importing ? "导入已取消" : converting ? "转换已取消" : cancellable ? "导出已取消" : "操作已取消";
 			result.canceled = true;
 		}
-		self.postMessage(result);
+		postMessage(result);
 	} finally {
 		password?.fill(0);
 		key?.fill(0);
@@ -320,6 +400,7 @@ async function handleMessage({ id, name, args }) {
 }

 function exitWASM(err) {
+	rejectRuntime(err || new Error("引擎运行中断"));
 	self.postMessage({ type: "exit", error: err?.message || "引擎运行中断" });
 	self.close();
 }
@@ -331,9 +412,7 @@ async function loadWASM(module) {
 	self.postMessage({ type: "progress", phase: "start", text: "正在启动引擎", percent: 58 });
 	go.run(instance).then(exitWASM, exitWASM);
 	if (!go.exited) {
-		const backends = JSON.parse(globalThis.ofdgoRenderBackends());
-		if (!backends.ok) throw new Error(backends.error);
-		self.postMessage({ type: "ready", backends: backends.data });
+		resolveRuntime();
 	}
 }

@@ -1,6 +1,6 @@
 const CACHE_PREFIX = `ofdgo:${self.registration.scope}:app:`;
 const META_CACHE = `${CACHE_PREFIX}meta`;
-const ASSETS = ["./", "ofdgo.css", "ofdgo.ico", "ofdgo.js", "ofdgo.json", "ofdgo.png", "ofdgo.svg", "ofdgo.wasm", "ofdgo_edit.js", "ofdgo_font.js", "ofdgo_host.js", "ofdgo_wasm.js", "ofdgo_work.js", "wasm_exec.js"]
+const ASSETS = ["./", "ofdgo.css", "ofdgo.ico", "ofdgo.js", "ofdgo.json", "ofdgo.png", "ofdgo.svg", "ofdgo.wasm", "ofdgo_edit.js", "ofdgo_font.js", "ofdgo_host.js", "ofdgo_print.js", "ofdgo_util.js", "ofdgo_view.js", "ofdgo_wasm.js", "ofdgo_work.js", "wasm_exec.js"]
 	.map((path) => new URL(path, self.registration.scope).href);
 const CLIENT_PREFIX = new URL("__client/", self.registration.scope).href;

@@ -92,6 +92,8 @@ async function readResource(event, navigation) {
 		bundle = await readBundle(meta, CLIENT_PREFIX + event.clientId);
 	}
 	if (!bundle || !await caches.has(bundle.name)) {
+		const client = await self.clients.get(event.clientId);
+		if (client && resourceURL(client.url) !== self.registration.scope) return fetch(event.request);
 		return Response.error();
 	}
 	if (event.resultingClientId) {
@@ -0,0 +1,18 @@
+setlocal
+set Version=
+for /f %%V in ('git show -s --format^=%%ct-%%H HEAD') do set Version=%%V
+
+set GOOS=linux
+set GOARCH=arm64
+set CGO_ENABLED=0
+go build -o releases/ofdgo_linux_arm64 -trimpath -ldflags "-s -w -buildid= -X github.com/xiaoqidun/ofdgo/internal/build.Version=%Version%" ./cmd/webview
+
+set GOOS=linux
+set GOARCH=amd64
+set CGO_ENABLED=0
+go build -o releases/ofdgo_linux_amd64 -trimpath -ldflags "-s -w -buildid= -X github.com/xiaoqidun/ofdgo/internal/build.Version=%Version%" ./cmd/webview
+
+set GOOS=windows
+set GOARCH=amd64
+set CGO_ENABLED=0
+go build -o releases/ofdgo_windows_amd64.exe -trimpath -ldflags "-H windowsgui -s -w -buildid= -X github.com/xiaoqidun/ofdgo/internal/build.Version=%Version%" ./cmd/webview
@@ -29,6 +29,7 @@ import (

 	"github.com/xiaoqidun/ofdgo/assets/webui"
 	"github.com/xiaoqidun/ofdgo/assets/webui/wasm"
+	"github.com/xiaoqidun/ofdgo/internal/build"
 )

 func main() {
@@ -50,6 +51,7 @@ func serveWebUI() http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Cache-Control", "no-store")
 		w.Header().Set("X-OFDGo-Checksum", checksum)
+		w.Header().Set("X-OFDGo-Build-Version", build.Version)
 		if r.URL.Path == "/ofdgo.wasm" {
 			wasm.ServeHTTP(w, r)
 			return
@@ -12,29 +12,48 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

-//go:build windows && amd64
+//go:build (windows && amd64) || (linux && (amd64 || arm64))

 package main

 import (
-	"context"
-	"flag"
-	"fmt"
 	"os"
-	"syscall"
-	"unsafe"
-
-	"github.com/xiaoqidun/ofdgo/internal/webview"
+	"strings"
 )

-func main() {
-	dataDir := flag.String("data-dir", "", "browser data directory")
-	flag.Parse()
-	if err := webview.Run(context.Background(), flag.Args(), *dataDir); err != nil {
-		fmt.Fprintln(os.Stderr, err)
-		message, _ := syscall.UTF16PtrFromString(err.Error())
-		title, _ := syscall.UTF16PtrFromString("OFDGo")
-		syscall.NewLazyDLL("user32.dll").NewProc("MessageBoxW").Call(0, uintptr(unsafe.Pointer(message)), uintptr(unsafe.Pointer(title)), 0x10)
-		os.Exit(1)
+// commandLine 读取桌面参数并处理参数错误
+// 返回: []string 文件路径, string 浏览器数据目录
+func commandLine() ([]string, string) {
+	paths, dataDir, ok := parseArguments(os.Args[1:])
+	if !ok {
+		os.Exit(2)
 	}
+	return paths, dataDir
+}
+
+// parseArguments 解析双横线选项及后续文件路径
+// 入参: args 启动参数
+// 返回: []string 文件路径, string 浏览器数据目录, bool 参数是否有效
+func parseArguments(args []string) ([]string, string, bool) {
+	var dataDir string
+	for len(args) > 0 {
+		arg := args[0]
+		switch {
+		case arg == "--":
+			return args[1:], dataDir, true
+		case arg == "--data-dir":
+			if len(args) < 2 || strings.HasPrefix(args[1], "-") {
+				return nil, dataDir, false
+			}
+			dataDir, args = args[1], args[1:]
+		case strings.HasPrefix(arg, "--data-dir="):
+			dataDir = strings.TrimPrefix(arg, "--data-dir=")
+		case strings.HasPrefix(arg, "-"):
+			return nil, dataDir, false
+		default:
+			return args, dataDir, true
+		}
+		args = args[1:]
+	}
+	return nil, dataDir, true
 }
@@ -0,0 +1,33 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux && (amd64 || arm64)
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/xiaoqidun/ofdgo/internal/webview"
+)
+
+func main() {
+	paths, dataDir := commandLine()
+	if err := webview.Run(context.Background(), paths, dataDir); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

-//go:build !windows || !amd64
+//go:build !(windows && amd64) && !(linux && (amd64 || arm64))

 package main

@@ -0,0 +1,38 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build windows && amd64
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"syscall"
+	"unsafe"
+
+	"github.com/xiaoqidun/ofdgo/internal/webview"
+)
+
+func main() {
+	paths, dataDir := commandLine()
+	if err := webview.Run(context.Background(), paths, dataDir); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		message, _ := syscall.UTF16PtrFromString(err.Error())
+		title, _ := syscall.UTF16PtrFromString("OFDGo")
+		syscall.NewLazyDLL("user32.dll").NewProc("MessageBoxW").Call(0, uintptr(unsafe.Pointer(message)), uintptr(unsafe.Pointer(title)), 0x10)
+		os.Exit(1)
+	}
+}
@@ -3,17 +3,18 @@ module github.com/xiaoqidun/ofdgo
 go 1.26.0

 require (
-	github.com/andybalholm/brotli v1.2.6
-	github.com/emmansun/gmsm v0.45.0
+	github.com/andybalholm/brotli v1.2.7
+	github.com/emmansun/gmsm v0.45.1
 	github.com/go-text/typesetting v0.3.5
 	github.com/tdewolff/canvas v0.0.0-20260923214215-09804640d00c
 	github.com/tdewolff/font v0.0.0-20261010204837-88a7f6b56918
-	github.com/xiaoqidun/guigo v0.0.0-20261017165144-57ca5ff5f547
+	github.com/xiaoqidun/guigo v0.0.0-20261026011429-36a970cd3fb6
 	github.com/xiaoqidun/j2kgo v1.0.2
 	github.com/xiaoqidun/jbig2 v1.1.8
-	github.com/xiaoqidun/pdfgo v0.0.0-20261018110224-069b0fe96ea8
+	github.com/xiaoqidun/pdfgo v0.0.0-20261026125713-90454771d5d0
 	golang.org/x/crypto v0.58.0
 	golang.org/x/image v0.47.0
+	golang.org/x/sys v0.49.0
 	golang.org/x/text v0.43.0
 )

@@ -26,6 +27,7 @@ require (
 	github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f // indirect
 	github.com/benoitkugler/textlayout v0.3.2 // indirect
 	github.com/benoitkugler/textprocessing v0.0.6 // indirect
+	github.com/ebitengine/purego v0.11.2 // indirect
 	github.com/go-fonts/latin-modern v0.3.3 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
@@ -34,7 +36,6 @@ require (
 	github.com/tdewolff/parse/v2 v2.8.16 // indirect
 	github.com/yuin/goldmark v1.8.5 // indirect
 	golang.org/x/net v0.60.0 // indirect
-	golang.org/x/sys v0.49.0 // indirect
 	modernc.org/knuth v0.6.0 // indirect
 	modernc.org/token v1.1.0 // indirect
 	star-tex.org/x/tex v0.7.1 // indirect
@@ -20,16 +20,18 @@ github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f h1:l7moT9o/v
 github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f/go.mod h1:vIOkSdX3NDCPwgu8FIuTat2zDF0FPXXQ0RYFRy+oQic=
 github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b h1:slYM766cy2nI3BwyRiyQj/Ud48djTMtMebDqepE95rw=
 github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b/go.mod h1:1KcenG0jGWcpt8ov532z81sp/kMMUG485J2InIOyADM=
-github.com/andybalholm/brotli v1.2.6 h1:ftYnfj6usCp+UGV5kSJ3+chpMQgU+gJf/AxsUQ52REI=
-github.com/andybalholm/brotli v1.2.6/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
+github.com/andybalholm/brotli v1.2.7 h1:UgafRPGMam5ySHfRkhthMqOFA6IFoeF3D7mWIDLjG5A=
+github.com/andybalholm/brotli v1.2.7/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/benoitkugler/pstokenizer v1.0.0/go.mod h1:l1G2Voirz0q/jj0TQfabNxVsa8HZXh/VMxFSRALWTiE=
 github.com/benoitkugler/textlayout v0.3.2 h1:Y/LTkwpQ9G0Fia9yhPmZA9IR5AnE8Cq30j3C+Gx5/IE=
 github.com/benoitkugler/textlayout v0.3.2/go.mod h1:o+1hFV+JSHBC9qNLIuwVoLedERU7sBPgEFcuSgfvi/w=
 github.com/benoitkugler/textlayout-testdata v0.1.1/go.mod h1:i/qZl09BbUOtd7Bu/W1CAubRwTWrEXWq6JwMkw8wYxo=
 github.com/benoitkugler/textprocessing v0.0.6 h1:obkMyj62GEPg3xUVYqROlCN22z1OleuZm6ULqX9Om1g=
 github.com/benoitkugler/textprocessing v0.0.6/go.mod h1:Io0gN08/PXEzrSOWFa88xHx2Xv3VjvLMY7H76YoI23A=
-github.com/emmansun/gmsm v0.45.0 h1:PU/6ObyR3g05YN3jn1L5GZDowzyAi8Xhkq4svzYNyiA=
-github.com/emmansun/gmsm v0.45.0/go.mod h1:HgLSvmdePGLo+Fo2PNgdTQU6lqAepSyriSQJRpECY6w=
+github.com/ebitengine/purego v0.11.2 h1:WWiTx8rD8zYdOwSj8O/NiNbsOvSAgJMTlyV1XlbUSeU=
+github.com/ebitengine/purego v0.11.2/go.mod h1:DCHPP08djqhNSoTfImcnHYQRZmd0qhakvrozqaEYhGQ=
+github.com/emmansun/gmsm v0.45.1 h1:S77WOluBZ9JH2wh701H2QR03eQYNGLeN8IUkdhgGpRA=
+github.com/emmansun/gmsm v0.45.1/go.mod h1:RfnfrzyB9XbDi73nF1NHbJeqJj+a6pg/pXr5lrZKMok=
 github.com/go-fonts/latin-modern v0.3.3 h1:g2xNgI8yzdNzIVm+qvbMryB6yGPe0pSMss8QT3QwlJ0=
 github.com/go-fonts/latin-modern v0.3.3/go.mod h1:tHaiWDGze4EPB0Go4cLT5M3QzRY3peya09Z/8KSCrpY=
 github.com/go-text/typesetting v0.3.5 h1:XZPUooClHY0Vf/rFyUyuPRNEkawARaFzLMQcXLSEyPk=
@@ -58,14 +60,14 @@ github.com/tdewolff/parse/v2 v2.8.16 h1:bLk5svUOQRkW/Y2SJ+DeENSIkZBcTIkq+Atyv5D8
 github.com/tdewolff/parse/v2 v2.8.16/go.mod h1:XdsoSFThlVIRIajAuqz1evNY7bagZS8LBOPA3aVopwQ=
 github.com/tdewolff/test v1.0.12 h1:7F21DqIajswxuche0geHdrUZRCWE4oko4b7bcmkkrxk=
 github.com/tdewolff/test v1.0.12/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
-github.com/xiaoqidun/guigo v0.0.0-20261017165144-57ca5ff5f547 h1:BEybx66cn0nugBoWwUNOnAWgpcRhPUWPxO3fyizebO0=
-github.com/xiaoqidun/guigo v0.0.0-20261017165144-57ca5ff5f547/go.mod h1:QAHK2Sa/KvY6dO+6dtvVUeOXVQO4Zh8R5oSSU+av7kE=
+github.com/xiaoqidun/guigo v0.0.0-20261026011429-36a970cd3fb6 h1:JqOQToWYKqyoIcvNx5MYfrdiuApjpBDnUjMHD7sCF6c=
+github.com/xiaoqidun/guigo v0.0.0-20261026011429-36a970cd3fb6/go.mod h1:bXz+dPMVntPIVwePTTuMXt8Q0z1YoUGuROQSsXyUEfY=
 github.com/xiaoqidun/j2kgo v1.0.2 h1:OAjjEOfaBaQzBNcj9wx+eM68UI5pewR6SzNZa1R1DIw=
 github.com/xiaoqidun/j2kgo v1.0.2/go.mod h1:DCwAfuDzCDYqUiAlZ7BDwigTjaXw7o9L1FtEma/D1aA=
 github.com/xiaoqidun/jbig2 v1.1.8 h1:dERPW7F8gs18a/DOD9gXHR3fP1Vl6KhCNsLnq5l3BIo=
 github.com/xiaoqidun/jbig2 v1.1.8/go.mod h1:9jromqVwMqlptUDEt6Yip8vqYA5I1YjhG7FgMl/Z2dA=
-github.com/xiaoqidun/pdfgo v0.0.0-20261018110224-069b0fe96ea8 h1:vEcUgzXL2Qbk8iXTYEauKGFgyqfv2Ns9ZSy7UMBh3tk=
-github.com/xiaoqidun/pdfgo v0.0.0-20261018110224-069b0fe96ea8/go.mod h1:AaabzsObZ8Z76AcaWbo6swRROrJsblyIGB7HbieeJA4=
+github.com/xiaoqidun/pdfgo v0.0.0-20261026125713-90454771d5d0 h1:fBOCrYQedZ3ZxAlpI5bXeVs+/kWxWbVrt0iFlmTYMpU=
+github.com/xiaoqidun/pdfgo v0.0.0-20261026125713-90454771d5d0/go.mod h1:AaabzsObZ8Z76AcaWbo6swRROrJsblyIGB7HbieeJA4=
 github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=
 github.com/xyproto/randomstring v1.0.5/go.mod h1:rgmS5DeNXLivK7YprL0pY+lTuhNQW3iGxZ18UQApw/E=
 github.com/yuin/goldmark v1.8.5 h1:r6N5afV5qj/5S4UTch8agZHJ8UxNCMwX7WjkkJam2NA=
@@ -131,6 +131,14 @@ func NormalizeCFFCharstringsAt(data []byte, unitsPerEm uint16) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
+	if _, cid := dict[1230]; !cid {
+		for op := 1231; op <= 1238; op++ {
+			if _, exists := dict[op]; exists {
+				delete(dict, op)
+				changed = true
+			}
+		}
+	}
 	if transform != nil {
 		scale := 1 / float64(unitsPerEm)
 		dict[1207] = []float64{scale, 0, 0, scale, 0, 0}
@@ -260,6 +268,21 @@ func SanitizeCFF(data []byte) ([]byte, error) {
 		if kind == 1 {
 			return normalizeCFFType1(data, topDict)
 		}
+		private, err := readType2Private(data, topDict[18], &type2Font{})
+		if err != nil {
+			return nil, err
+		}
+		count := len(private)
+		if err := normalizeCFFPrivate(private); err != nil {
+			return nil, err
+		}
+		if len(private) != count {
+			font, err := readType2Font(data)
+			if err != nil {
+				return nil, err
+			}
+			return rebuildNamedCFF(data, font, font.chars, nil)
+		}
 		return data, nil
 	}
 	fdArrOff, err := cffDictOffset(data, topDict, 1236)
@@ -316,10 +339,9 @@ func SanitizeCFF(data []byte) ([]byte, error) {
 		localSubrData = data[start:end]
 	}
 	charStringsData := data[charStringsOff:charEnd]
-	delete(topDict, 1230)
-	delete(topDict, 1236)
-	delete(topDict, 1237)
-	delete(topDict, 1234)
+	for op := 1230; op <= 1238; op++ {
+		delete(topDict, op)
+	}
 	delete(topDict, 15)
 	delete(topDict, 16)
 	var finalPrivData []byte
@@ -342,17 +364,21 @@ func SanitizeCFF(data []byte) ([]byte, error) {
 	return encodeSanitizedCFF(data[:hdrSize], nameIndexData, topDict, stringIndexData, globalSubrIndexData, charStringsData, finalPrivData, localSubrData), nil
 }

-// normalizeCFFPrivate 移除旧版CFF中不生效的缺省字段，拒绝需要额外解释的取值
+// normalizeCFFPrivate 移除废弃的加粗阈值及未加密标记，拒绝加密字形程序
 // 入参: dict 私有字典
 // 返回: error 不支持的旧版行为
 func normalizeCFFPrivate(dict cffDict) error {
-	for op, value := range map[int]float64{1215: 0, 1216: -1} {
-		if values, ok := dict[op]; ok {
-			if len(values) != 1 || values[0] != value {
-				return fmt.Errorf("unsupported legacy CFF private operator %d", op)
-			}
-			delete(dict, op)
+	if values, ok := dict[1215]; ok {
+		if len(values) != 1 || !finite(values[0]) {
+			return fmt.Errorf("invalid legacy CFF bold threshold")
 		}
+		delete(dict, 1215)
+	}
+	if values, ok := dict[1216]; ok {
+		if len(values) != 1 || values[0] != -1 {
+			return fmt.Errorf("unsupported legacy CFF private operator 1216")
+		}
+		delete(dict, 1216)
 	}
 	return nil
 }
@@ -475,10 +501,9 @@ func sanitizeMultiFDCFF(data []byte, hdrSize int, nameIndexData []byte, topDict
 		}
 		inlined[gid] = output.Bytes()
 	}
-	delete(topDict, 1230)
-	delete(topDict, 1236)
-	delete(topDict, 1237)
-	delete(topDict, 1234)
+	for op := 1230; op <= 1238; op++ {
+		delete(topDict, op)
+	}
 	delete(topDict, 15)
 	delete(topDict, 16)
 	delete(topDict, 1206)
@@ -231,6 +231,9 @@ func rebuildNamedCFF(data []byte, font *type2Font, chars [][]byte, ids []uint16)
 	if err != nil {
 		return nil, err
 	}
+	if err := normalizeCFFPrivate(private); err != nil {
+		return nil, err
+	}
 	privateData, err := encodeCFFSubsetPrivate(private)
 	if err != nil {
 		return nil, err
@@ -16,6 +16,7 @@ package font

 import (
 	"bytes"
+	"crypto/sha256"
 	"encoding/binary"
 	"fmt"
 	"strings"
@@ -23,6 +24,8 @@ import (
 )

 // Face 字体文件中的字体名称与零起始索引，不依赖文件名
+// Family和Style为排版族，MenuFamily和MenuStyle为兼容四款式的菜单名称
+// FamilyKey区分兼容族、厂商和版本，未知时为空；Bold和Italic表示字体固有样式
 type Face struct {
 	Index          int      `json:"index"`
 	FullName       string   `json:"fullName"`
@@ -30,6 +33,11 @@ type Face struct {
 	Style          string   `json:"style"`
 	PostScriptName string   `json:"postscriptName"`
 	Names          []string `json:"names"`
+	MenuFamily     string   `json:"menuFamily"`
+	MenuStyle      string   `json:"menuStyle"`
+	FamilyKey      string   `json:"familyKey"`
+	Bold           bool     `json:"bold"`
+	Italic         bool     `json:"italic"`
 }

 // FaceInfo 从名称表读取字体信息
@@ -68,7 +76,40 @@ func faceInfoLanguage(data []byte, index int, platform, language uint16) Face {
 		}
 		return name(ids...)
 	}
-	return Face{Index: index, FullName: localized(4, 6, 16, 1), Family: localized(16, 1), Style: localized(17, 2), PostScriptName: name(6), Names: fontNamesFromValues(records, values)}
+	key := ""
+	if family, version := name(1), name(5); family != "" && version != "" {
+		key = fmt.Sprintf("%x", sha256.Sum256([]byte(strings.Join([]string{family, version, name(8)}, "\x00"))))
+	}
+	family, style := localized(1), localized(2)
+	if family == "" {
+		family = localized(16, 4, 6)
+	}
+	if style == "" {
+		style = localized(17)
+	}
+	return Face{Index: index, FullName: localized(4, 6, 16, 1), Family: localized(16, 1), Style: localized(17, 2), PostScriptName: name(6), Names: fontNamesFromValues(records, values), MenuFamily: family, MenuStyle: style, FamilyKey: key}
+}
+
+// TableFaceInfo 读取名称及字体固有款式，名称键不随显示语言变化
+// 入参: tables 字体表, index 集合索引, platform 平台标识, language 语言标识
+// 返回: Face 字体信息
+func TableFaceInfo(tables map[string][]byte, index int, platform, language uint16) Face {
+	face := faceInfoLanguage(tables["name"], index, platform, language)
+	key := face.FamilyKey
+	if head := tables["head"]; len(head) >= 46 {
+		key += string(head[4:8])
+		style := binary.BigEndian.Uint16(head[44:])
+		face.Bold, face.Italic = style&1 != 0, style&2 != 0
+	}
+	if os2 := tables["OS/2"]; len(os2) >= 64 {
+		key += string(os2[58:62])
+		style := binary.BigEndian.Uint16(os2[62:])
+		face.Bold, face.Italic = style&32 != 0, style&1 != 0 || style&512 != 0
+	}
+	if face.FamilyKey != "" {
+		face.FamilyKey = fmt.Sprintf("%x", sha256.Sum256([]byte(key)))
+	}
+	return face
 }

 // FileCount 校验字体或集合头并读取字体数量
@@ -114,7 +155,7 @@ func ReadLocalizedFaces(data []byte, platform, language uint16) ([]Face, error)
 		if err != nil {
 			return nil, err
 		}
-		face := faceInfoLanguage(tables["name"], index, platform, language)
+		face := TableFaceInfo(tables, index, platform, language)
 		if face.FullName == "" {
 			return nil, fmt.Errorf("font %d has no usable name", index)
 		}
@@ -235,7 +235,7 @@ func (f *Outliner) phantomPoints(id uint16, data []byte) [4]ttPoint {
 	return [4]ttPoint{{x: left * 64, ox: left * 64}, {x: (left + int32(f.Font.GlyphAdvance(id))) * 64, ox: (left + int32(f.Font.GlyphAdvance(id))) * 64}, {y: top * 64, oy: top * 64}, {y: (top - int32(f.Font.GlyphVerticalAdvance(id))) * 64, oy: (top - int32(f.Font.GlyphVerticalAdvance(id))) * 64}}
 }

-// ttRecoverableHint 判断栈参数、指令引用或控制流错误是否允许保留执行前轮廓
+// ttRecoverableHint 判断栈参数、区点轮廓及函数引用或控制流错误是否允许保留执行前轮廓
 // 入参: err 指令错误
 // 返回: bool 是否可恢复
 func ttRecoverableHint(err error) bool {
@@ -25,7 +25,7 @@ import (
 // errTTStackUnderflow 表示字形程序缺少必需的栈参数
 var errTTStackUnderflow = errors.New("TrueType instruction stack underflow")

-// errTTInvalidReference 表示字形指令引用不存在的点或函数
+// errTTInvalidReference 表示字形指令引用不存在的区、点、轮廓或函数
 var errTTInvalidReference = errors.New("invalid TrueType instruction reference")

 // errTTInvalidControlFlow 表示条件分支未闭合或跳转超出字节码范围
@@ -380,7 +380,8 @@ func (v *ttInterpreter) execute(code []byte, depth int) error {
 			case op >= 0x13 && op <= 0x16:
 				z := v.pop()
 				if z < 0 || z > 1 {
-					return fmt.Errorf("invalid TrueType zone")
+					v.err = fmt.Errorf("%w: zone %d", errTTInvalidReference, z)
+					break
 				}
 				if op == 0x16 {
 					g.zone = [3]int32{z, z, z}
@@ -854,7 +855,7 @@ func (v *ttInterpreter) shift(op byte) {
 	if op <= 0x35 {
 		contour := v.pop()
 		if contour < 0 || int64(contour) >= int64(len(v.ends)) {
-			v.err = fmt.Errorf("invalid TrueType contour reference")
+			v.err = fmt.Errorf("%w: contour %d", errTTInvalidReference, contour)
 			return
 		}
 		if contour > 0 {
@@ -864,7 +865,7 @@ func (v *ttInterpreter) shift(op byte) {
 	} else {
 		target = v.pop()
 		if target < 0 || target > 1 {
-			v.err = fmt.Errorf("invalid TrueType zone")
+			v.err = fmt.Errorf("%w: zone %d", errTTInvalidReference, target)
 			return
 		}
 		to = len(v.zones[target])
@@ -142,7 +142,7 @@ func fontNameValues(data []byte) ([]fontNameRecord, map[[4]uint16]string) {
 	values := make(map[[4]uint16]string)
 	for _, record := range records {
 		switch record.Name {
-		case 1, 2, 4, 6, 16, 17:
+		case 1, 2, 4, 5, 6, 8, 16, 17:
 		default:
 			continue
 		}
@@ -17,9 +17,11 @@ package font
 import (
 	"encoding/binary"
 	"fmt"
+	"iter"
 	"maps"
 	"slices"
 	"sync"
+	"unicode/utf8"

 	"github.com/go-text/typesetting/font/opentype/tables"
 )
@@ -34,10 +36,12 @@ type SFNT struct {
 	reverse                            map[uint16][]rune
 }

-// sfntCmap 保存编码记录及对应字符映射，标记已解析的共享子表
+// sfntCmap 保存编码记录及字符映射，连续区间与共享子表不重复展开
 type sfntCmap struct {
 	platform, encoding, format uint16
 	mapping                    map[rune]uint16
+	groups                     []byte
+	entries                    uint64
 	duplicate                  bool
 }

@@ -90,7 +94,7 @@ func ParseSFNTTables(table map[string][]byte) (*SFNT, error) {
 		if cmap.duplicate {
 			continue
 		}
-		for _, glyph := range cmap.mapping {
+		for _, glyph := range cmap.pairs() {
 			if glyph >= f.count {
 				return nil, fmt.Errorf("cmap glyph index out of range")
 			}
@@ -119,7 +123,7 @@ func readSFNTCmaps(data []byte) ([]sfntCmap, error) {
 	}
 	count := int(binary.BigEndian.Uint16(data[2:]))
 	result := make([]sfntCmap, 0, count)
-	parsed := make(map[uint32]map[rune]uint16)
+	parsed := make(map[uint32]sfntCmap)
 	for i := range count {
 		record := data[4+8*i:]
 		offset := binary.BigEndian.Uint32(record[4:])
@@ -128,23 +132,44 @@ func readSFNTCmaps(data []byte) ([]sfntCmap, error) {
 		}
 		sub := data[offset:]
 		format := binary.BigEndian.Uint16(sub)
-		mapping, found := parsed[offset]
+		cmap, found := parsed[offset]
 		if !found {
-			mapping = make(map[rune]uint16)
+			cmap.mapping = make(map[rune]uint16)
 			var err error
 			switch format {
 			case 0:
-				parseCmapFormat0(sub, mapping)
+				parseCmapFormat0(sub, cmap.mapping)
 			case 4:
-				parseCmapFormat4(sub, mapping)
+				parseCmapFormat4(sub, cmap.mapping)
 			case 6:
-				parseCmapFormat6(sub, mapping)
+				parseCmapFormat6(sub, cmap.mapping)
 			case 12:
-				parseCmapFormat12(sub, mapping)
+				if len(sub) >= 16 {
+					length := uint64(binary.BigEndian.Uint32(sub[4:]))
+					count := uint64(binary.BigEndian.Uint32(sub[12:]))
+					if length >= 16 && length <= uint64(len(sub)) && count <= (length-16)/12 {
+						cmap.groups = sub[16 : 16+12*count]
+						for offset := 0; offset < len(cmap.groups); offset += 12 {
+							first := binary.BigEndian.Uint32(cmap.groups[offset:])
+							last := binary.BigEndian.Uint32(cmap.groups[offset+4:])
+							if first > last || offset != 0 && first <= binary.BigEndian.Uint32(cmap.groups[offset-8:]) {
+								cmap.groups = nil
+								parseCmapFormat12(sub, cmap.mapping)
+								break
+							}
+						}
+						if cmap.groups != nil {
+							cmap.mapping = nil
+							for range cmap.pairs() {
+								cmap.entries++
+							}
+						}
+					}
+				}
 			case 2:
-				mapping, err = parseCmapFormat2(sub)
+				cmap.mapping, err = parseCmapFormat2(sub)
 			case 8, 10, 13:
-				mapping, err = parseCmapExtended(sub)
+				cmap.mapping, err = parseCmapExtended(sub)
 			case 14:
 			default:
 				return nil, fmt.Errorf("unsupported cmap format %d", format)
@@ -152,13 +177,67 @@ func readSFNTCmaps(data []byte) ([]sfntCmap, error) {
 			if err != nil {
 				return nil, err
 			}
-			parsed[offset] = mapping
+			parsed[offset] = cmap
 		}
-		result = append(result, sfntCmap{platform: binary.BigEndian.Uint16(record), encoding: binary.BigEndian.Uint16(record[2:]), format: format, mapping: mapping, duplicate: found})
+		cmap.platform, cmap.encoding, cmap.format, cmap.duplicate = binary.BigEndian.Uint16(record), binary.BigEndian.Uint16(record[2:]), format, found
+		result = append(result, cmap)
 	}
 	return result, nil
 }

+// pairs 按原映射返回字符与字形，连续编码段不展开存储
+// 返回: iter.Seq2[rune, uint16] 非零有效字符映射
+func (c sfntCmap) pairs() iter.Seq2[rune, uint16] {
+	return func(yield func(rune, uint16) bool) {
+		for char, glyph := range c.mapping {
+			if !yield(char, glyph) {
+				return
+			}
+		}
+		for offset := 0; offset+12 <= len(c.groups); offset += 12 {
+			group := c.groups[offset:]
+			first, last, glyph := binary.BigEndian.Uint32(group), binary.BigEndian.Uint32(group[4:]), binary.BigEndian.Uint32(group[8:])
+			if first > last || first > utf8.MaxRune || glyph > 65535 {
+				continue
+			}
+			end := min(uint64(last), uint64(first)+65535-uint64(glyph), uint64(utf8.MaxRune))
+			for char := uint64(first); char <= end; char++ {
+				id := uint16(uint64(glyph) + char - uint64(first))
+				if id != 0 && utf8.ValidRune(rune(char)) && !yield(rune(char), id) {
+					return
+				}
+			}
+		}
+	}
+}
+
+// lookup 查找原字符映射，连续编码段使用有序区间查询
+// 入参: char 字符
+// 返回: uint16 字形编号, bool 是否存在映射
+func (c sfntCmap) lookup(char rune) (uint16, bool) {
+	if glyph, ok := c.mapping[char]; ok {
+		return glyph, true
+	}
+	if !utf8.ValidRune(char) {
+		return 0, false
+	}
+	low, high := 0, len(c.groups)/12
+	for low < high {
+		middle := low + (high-low)/2
+		group := c.groups[middle*12:]
+		first, last := binary.BigEndian.Uint32(group), binary.BigEndian.Uint32(group[4:])
+		if uint32(char) < first {
+			high = middle
+		} else if uint32(char) > last {
+			low = middle + 1
+		} else {
+			glyph := uint64(binary.BigEndian.Uint32(group[8:])) + uint64(uint32(char)-first)
+			return uint16(glyph), glyph > 0 && glyph <= 65535
+		}
+	}
+	return 0, false
+}
+
 // UnitsPerEm 返回字体设计单位
 // 返回: uint16 每em单位数
 func (f *SFNT) UnitsPerEm() uint16 { return f.units }
@@ -172,7 +251,7 @@ func (f *SFNT) NumGlyphs() uint16 { return f.count }
 func (f *SFNT) CmapEntries() uint64 {
 	var count uint64
 	for _, cmap := range f.cmaps {
-		count += uint64(len(cmap.mapping))
+		count += uint64(len(cmap.mapping)) + cmap.entries
 	}
 	return count
 }
@@ -185,14 +264,14 @@ func (f *SFNT) GlyphIndex(char rune) uint16 {
 		if cmap.duplicate {
 			continue
 		}
-		if gid := cmap.mapping[char]; gid != 0 {
+		if gid, ok := cmap.lookup(char); ok && gid != 0 {
 			return gid
 		}
 	}
 	return 0
 }

-// glyphCharacters 返回指向指定字形的全部字符
+// glyphCharacters 返回指向指定字形的全部字符，连续区间按需反查
 // 入参: gid 字形编号
 // 返回: []rune 排序后的字符
 func (f *SFNT) glyphCharacters(gid uint16) []rune {
@@ -204,7 +283,7 @@ func (f *SFNT) glyphCharacters(gid uint16) []rune {
 				continue
 			}
 			for char, glyph := range cmap.mapping {
-				if glyph != 0 && !seen[char] {
+				if glyph != 0 && !seen[char] && f.GlyphIndex(char) == glyph {
 					f.reverse[glyph] = append(f.reverse[glyph], char)
 					seen[char] = true
 				}
@@ -214,7 +293,28 @@ func (f *SFNT) glyphCharacters(gid uint16) []rune {
 			slices.Sort(chars)
 		}
 	})
-	return f.reverse[gid]
+	if gid == 0 {
+		return nil
+	}
+	chars := slices.Clone(f.reverse[gid])
+	for _, cmap := range f.cmaps {
+		if cmap.duplicate {
+			continue
+		}
+		for offset := 0; offset+12 <= len(cmap.groups); offset += 12 {
+			group := cmap.groups[offset:]
+			first, last, glyph := binary.BigEndian.Uint32(group), binary.BigEndian.Uint32(group[4:]), binary.BigEndian.Uint32(group[8:])
+			if first > last || uint32(gid) < glyph {
+				continue
+			}
+			char := uint64(first) + uint64(uint32(gid)-glyph)
+			if char <= uint64(last) && char <= utf8.MaxRune && utf8.ValidRune(rune(char)) && f.GlyphIndex(rune(char)) == gid {
+				chars = append(chars, rune(char))
+			}
+		}
+	}
+	slices.Sort(chars)
+	return slices.Compact(chars)
 }

 // GlyphAdvance 返回水平字宽
@@ -197,7 +197,7 @@ func subsetSourceSFNT(sfnt *SFNT, usage *Usage, size int) []byte {
 	for char := range usage.Characters {
 		id := sfnt.GlyphIndex(char)
 		for _, cmap := range unicodeTables {
-			if alternate, ok := cmap.mapping[char]; ok && alternate != id {
+			if alternate, ok := cmap.lookup(char); ok && alternate != id {
 				return nil
 			}
 		}
@@ -198,6 +198,9 @@ func ParseType1Program(data []byte) (Type1Program, error) {
 		return Type1Program{}, fmt.Errorf("Type1 font has no glyphs")
 	}
 	for index := range program.subrs {
+		if program.subrs[index] == nil {
+			continue
+		}
 		program.subrs[index], err = type1CharString(program.subrs[index], program.lenIV)
 		if err != nil {
 			return Type1Program{}, err
@@ -212,6 +215,61 @@ func ParseType1Program(data []byte) (Type1Program, error) {
 	return program, nil
 }

+// NormalizePDFType1 修复完整加密分段之后的PFB明文尾部，不补齐加密或字形数据
+// 入参: data 原始PFB程序
+// 返回: []byte 原程序或独立修复容器, bool 是否修复, error 容器或程序错误
+func NormalizePDFType1(data []byte) ([]byte, bool, error) {
+	if len(data) < 6 || data[0] != 0x80 {
+		return data, false, nil
+	}
+	binarySeen := false
+	for offset := 0; offset+2 <= len(data) && data[offset] == 0x80; {
+		kind := data[offset+1]
+		if kind == 3 {
+			return data, false, nil
+		}
+		if offset+6 > len(data) || kind != 1 && kind != 2 {
+			return data, false, fmt.Errorf("incomplete PFB segment header")
+		}
+		length := uint64(binary.LittleEndian.Uint32(data[offset+2:]))
+		remaining := len(data) - offset - 6
+		if binarySeen && kind == 1 && remaining == 0 {
+			result := append(bytes.Clone(data[:offset]), 0x80, 3)
+			if _, err := ParseType1Program(result); err != nil {
+				return nil, false, err
+			}
+			return result, true, nil
+		}
+		if length > uint64(remaining) {
+			return nil, false, fmt.Errorf("incomplete PFB encrypted or text segment")
+		}
+		if binarySeen && kind == 1 && length == 0 {
+			tail := data[offset+6:]
+			if len(tail) < 2 || !bytes.Equal(tail[len(tail)-2:], []byte{0x80, 3}) {
+				return data, false, fmt.Errorf("unbounded PFB text trailer")
+			}
+			text := bytes.TrimSpace(tail[:len(tail)-2])
+			if !bytes.HasSuffix(text, []byte("cleartomark")) {
+				return data, false, fmt.Errorf("PFB trailer lacks cleartomark")
+			}
+			for _, b := range bytes.TrimSuffix(text, []byte("cleartomark")) {
+				if b != '0' && !type1Space(b) {
+					return data, false, fmt.Errorf("unexpected PFB text trailer")
+				}
+			}
+			result := bytes.Clone(data)
+			binary.LittleEndian.PutUint32(result[offset+2:], uint32(len(tail)-2))
+			if _, err := ParseType1Program(result); err != nil {
+				return nil, false, err
+			}
+			return result, true, nil
+		}
+		binarySeen = binarySeen || kind == 2
+		offset += 6 + int(length)
+	}
+	return data, false, nil
+}
+
 // readType1Header 读取明文字体矩阵及加密数据起点
 // 入参: data Type1程序
 // 返回: []float64 字体矩阵, int 加密起点, error 头部错误
@@ -87,6 +87,108 @@ func FileTables(data []byte, index int) (map[string][]byte, error) {
 	return tables, nil
 }

+// NormalizePDFProgram 修复可确定的PDF内嵌SFNT封装，不补造TrueType轮廓或字形编号
+// 入参: data 原始字体程序
+// 返回: []byte 原程序或独立修复程序, bool 是否修复, error 无法确认的目录或度量错误
+func NormalizePDFProgram(data []byte) ([]byte, bool, error) {
+	if len(data) < 12 || string(data[:4]) != "OTTO" && string(data[:4]) != "\x00\x01\x00\x00" && string(data[:4]) != "true" {
+		return data, false, nil
+	}
+	count := int(binary.BigEndian.Uint16(data[4:6]))
+	if count == 0 || count > (len(data)-12)/16 {
+		return nil, false, fmt.Errorf("unrecoverable PDF font directory size")
+	}
+	first := len(data)
+	for n := 0; n < count; n++ {
+		record := data[12+n*16:]
+		start, size := uint64(binary.BigEndian.Uint32(record[8:])), uint64(binary.BigEndian.Uint32(record[12:]))
+		if size != 0 && start >= 12 && start+size <= uint64(len(data)) {
+			first = min(first, int(start))
+		}
+	}
+	changed := false
+	if first < 12+count*16 {
+		if (first-12)%16 != 0 {
+			return nil, false, fmt.Errorf("ambiguous PDF font directory overlap")
+		}
+		actual := (first - 12) / 16
+		for n := 0; n < count; n++ {
+			record := data[12+n*16:]
+			printable := true
+			for _, b := range record[:4] {
+				printable = printable && b >= 32 && b <= 126
+			}
+			if printable != (n < actual) {
+				return nil, false, fmt.Errorf("ambiguous PDF font table count")
+			}
+			if n < actual {
+				start, size := uint64(binary.BigEndian.Uint32(record[8:])), uint64(binary.BigEndian.Uint32(record[12:]))
+				if size != 0 && (start < uint64(first) || start+size > uint64(len(data))) {
+					return nil, false, fmt.Errorf("incomplete PDF font table")
+				}
+			}
+		}
+		data = bytes.Clone(data)
+		binary.BigEndian.PutUint16(data[4:6], uint16(actual))
+		changed = true
+	}
+	tables, err := FileTables(data, 0)
+	if err != nil {
+		return nil, false, err
+	}
+	if head := tables["head"]; len(head) > 54 && len(head) <= 57 {
+		tables["head"] = head[:54]
+		changed = true
+	}
+	if hhea := tables["hhea"]; len(hhea) > 36 && len(hhea) <= 39 && binary.BigEndian.Uint32(hhea) == 0x00010000 {
+		tables["hhea"] = hhea[:36]
+		changed = true
+	}
+	if maxp := tables["maxp"]; tables["glyf"] != nil && len(maxp) > 32 && len(maxp) <= 35 && binary.BigEndian.Uint32(maxp) == 0x00010000 {
+		tables["maxp"] = maxp[:32]
+		changed = true
+	}
+	if post := tables["post"]; len(post) > 32 && binary.BigEndian.Uint32(post) == 0x00030000 {
+		tables["post"] = post[:32]
+		changed = true
+	}
+	if cvt := tables["cvt "]; len(cvt)%2 != 0 && cvt[len(cvt)-1] == 0 {
+		tables["cvt "] = cvt[:len(cvt)-1]
+		changed = true
+	}
+	if len(tables["CFF "]) != 0 && len(tables["head"]) == 0 && len(tables["maxp"]) == 0 && len(tables["hhea"]) == 0 && len(tables["hmtx"]) == 0 {
+		program, _, err := WrapCFFToOTF(tables["CFF "])
+		return program, true, err
+	}
+	if maxp := tables["maxp"]; len(tables["CFF "]) != 0 && tables["glyf"] == nil && len(maxp) >= 6 && (binary.BigEndian.Uint32(maxp) == 0x00010000 || binary.BigEndian.Uint32(maxp) == 0x00005000 && len(maxp) != 6) {
+		count, err := parseCFFAndCountGlyphs(tables["CFF "])
+		if err != nil {
+			return nil, false, err
+		}
+		if count != int(binary.BigEndian.Uint16(maxp[4:6])) {
+			program, _, err := WrapCFFToOTF(tables["CFF "])
+			if err != nil {
+				return nil, false, err
+			}
+			rebuilt, err := FileTables(program, 0)
+			if err != nil {
+				return nil, false, err
+			}
+			if len(tables["head"]) < 20 || !bytes.Equal(tables["head"][18:20], rebuilt["head"][18:20]) {
+				return nil, false, fmt.Errorf("CFF and SFNT design units differ")
+			}
+			return program, true, nil
+		}
+		tables["maxp"] = buildCFFMaxpTable(uint16(count))
+		changed = true
+	}
+	if !changed {
+		return data, false, nil
+	}
+	program, err := SerializeOTF(tables)
+	return program, true, err
+}
+
 // calcTableChecksum 计算字体表校验和
 // 入参: data 表数据
 // 返回: uint32 校验和
@@ -56,7 +56,7 @@ func (s rasterImageSource) RGBA64At(x, y int) color.RGBA64 {
 	return color.RGBA64{R: uint16(r), G: uint16(g), B: uint16(b), A: uint16(a)}
 }

-// drawRasterAxisImage 按像素中心进行轴向缩放，逐行复用横向采样并保留镜像与小数坐标
+// drawRasterAxisImage 轴向缩放复用逐行采样，细轴按面积覆盖并保留镜像与小数坐标
 // 入参: dst 目标图像, src 源图像, m 像素变换, op 合成操作
 // 返回: bool 是否使用轴向采样
 func drawRasterAxisImage(dst draw.Image, src image.Image, m [6]float64, op draw.Op) bool {
@@ -78,8 +78,14 @@ func drawRasterAxisImage(dst draw.Image, src image.Image, m [6]float64, op draw.
 		return true
 	}
 	if float64(r.Dx())*math.Min(float64(r.Dy()), math.Ceil(4*math.Max(1, sy))+2) > rasterScaleBufferLimit/32 {
+		if sx*float64(b.Dx()) < 1 || sy*float64(b.Dy()) < 1 {
+			return drawRasterFootprintImage(dst, src, m, op, r)
+		}
 		return false
 	}
+	if !rasterFootprintWeightsFit(b, r, m) {
+		return drawRasterFootprintImage(dst, src, m, op, r)
+	}
 	xs := rasterImageAxis(r.Min.X, r.Max.X, b.Min.X, b.Max.X, m[0], m[4])
 	ys := rasterImageAxis(r.Min.Y, r.Max.Y, b.Min.Y, b.Max.Y, m[3], m[5])
 	if len(xs) == 0 || len(ys) == 0 {
@@ -139,10 +145,13 @@ func drawRasterAxisImage(dst draw.Image, src image.Image, m [6]float64, op draw.
 	return true
 }

-// rasterImageAxis 按连续源坐标生成CatmullRom权重，不对图像几何边界取整
+// rasterImageAxis 按连续源坐标生成CatmullRom权重，亚像素细轴使用面积覆盖权重
 // 入参: first 目标起点, end 目标终点, source 源起点, limit 源终点, scale 缩放比例, offset 平移距离
 // 返回: []rasterAxisSample 轴向采样表
 func rasterImageAxis(first, end, source, limit int, scale, offset float64) []rasterAxisSample {
+	if math.Abs(scale)*float64(limit-source) < 1 {
+		return rasterImageFootprintAxis(first, end, source, limit, scale, offset)
+	}
 	result := make([]rasterAxisSample, 0, end-first)
 	argument := math.Min(1, math.Abs(scale))
 	support := draw.CatmullRom.Support / argument
@@ -183,6 +192,142 @@ func rasterImageAxis(first, end, source, limit int, scale, offset float64) []ras
 	return result
 }

+// rasterFootprintWeightsFit 检查细轴权重表的合计预算，乘法前排除溢出
+// 入参: source 源边界, target 目标范围, m 像素变换
+// 返回: bool 权重表是否符合预算
+func rasterFootprintWeightsFit(source, target image.Rectangle, m [6]float64) bool {
+	budget := rasterScaleBufferLimit / 8
+	for _, axis := range [...]struct {
+		source, target int
+		scale          float64
+	}{{source.Dx(), target.Dx(), m[0]}, {source.Dy(), target.Dy(), m[3]}} {
+		if math.Abs(axis.scale)*float64(axis.source) < 1 && axis.target > 0 {
+			n, samples := axis.source, min(2, axis.target)
+			if n > budget/samples {
+				return false
+			}
+			budget -= n * samples
+		}
+	}
+	return true
+}
+
+// rasterImageWeightSpan 提供单个目标像素的源范围和权重，不分配整轴权重表
+// 入参: pixel 目标像素, source 源起点, limit 源终点, scale 缩放比例, offset 平移距离
+// 返回: int 源起点, int 源终点, func(int)float64 源权重
+func rasterImageWeightSpan(pixel, source, limit int, scale, offset float64) (int, int, func(int) float64) {
+	if math.Abs(scale)*float64(limit-source) < 1 {
+		left, right := (float64(pixel)-offset)/scale, (float64(pixel+1)-offset)/scale
+		if right < left {
+			left, right = right, left
+		}
+		if right <= float64(source) || left >= float64(limit) {
+			return 0, 0, nil
+		}
+		return source, limit, func(x int) float64 {
+			return math.Max(0, math.Min(float64(x)+1, right)-math.Max(float64(x), left)) * math.Abs(scale)
+		}
+	}
+	center := (float64(pixel) + .5 - offset) / scale
+	if center < float64(source) || center >= float64(limit) {
+		return 0, 0, nil
+	}
+	center -= .5
+	argument := math.Min(1, math.Abs(scale))
+	support := draw.CatmullRom.Support / argument
+	start := int(max(float64(source), math.Floor(center-support)))
+	stop := int(min(float64(limit), math.Ceil(center+support)))
+	weight := func(x int) float64 {
+		distance := math.Abs((float64(x) - center) * argument)
+		if distance < draw.CatmullRom.Support {
+			return draw.CatmullRom.At(distance)
+		}
+		return 0
+	}
+	var total float64
+	for x := start; x < stop; x++ {
+		total += weight(x)
+	}
+	return start, stop, func(x int) float64 { return weight(x) / total }
+}
+
+// drawRasterFootprintImage 在细轴权重超预算时按原累加顺序逐点绘制
+// 入参: dst 目标图像, src 源图像, m 像素变换, op 合成操作, target 目标范围
+// 返回: bool 是否完成绘制
+func drawRasterFootprintImage(dst draw.Image, src image.Image, m [6]float64, op draw.Op, target image.Rectangle) bool {
+	pixels, ok := src.(image.RGBA64Image)
+	if !ok {
+		pixels = rasterImageSource{src}
+	}
+	b := src.Bounds()
+	output := image.NewRGBA64(image.Rect(0, 0, 1, 1))
+	var value [1]rasterImagePixel
+	for y := target.Min.Y; y < target.Max.Y; y++ {
+		firstY, endY, wy := rasterImageWeightSpan(y, b.Min.Y, b.Max.Y, m[3], m[5])
+		if firstY == endY {
+			continue
+		}
+		for x := target.Min.X; x < target.Max.X; x++ {
+			firstX, endX, wx := rasterImageWeightSpan(x, b.Min.X, b.Max.X, m[0], m[4])
+			if firstX == endX {
+				continue
+			}
+			value[0] = rasterImagePixel{}
+			for sy := firstY; sy < endY; sy++ {
+				var row rasterImagePixel
+				for sx := firstX; sx < endX; sx++ {
+					p, weight := pixels.RGBA64At(sx, sy), wx(sx)
+					if weight != 0 {
+						row.r += float64(p.R) * weight
+						row.g += float64(p.G) * weight
+						row.b += float64(p.B) * weight
+						row.a += float64(p.A) * weight
+					}
+				}
+				if weight := wy(sy); weight != 0 {
+					value[0].r += row.r * weight
+					value[0].g += row.g * weight
+					value[0].b += row.b * weight
+					value[0].a += row.a * weight
+				}
+			}
+			rasterImageWriteRow(dst, output, value[:], x, y, op)
+		}
+	}
+	return true
+}
+
+// rasterImageFootprintAxis 对不足一个目标像素的整轴保留真实交叠面积及预乘透明度
+// 入参: first 目标起点, end 目标终点, source 源起点, limit 源终点, scale 缩放比例, offset 平移距离
+// 返回: []rasterAxisSample 轴向覆盖权重
+func rasterImageFootprintAxis(first, end, source, limit int, scale, offset float64) []rasterAxisSample {
+	lo, hi := float64(source)*scale+offset, float64(limit)*scale+offset
+	if hi < lo {
+		lo, hi = hi, lo
+	}
+	result := make([]rasterAxisSample, 0, min(2, end-first))
+	for pixel := first; pixel < end; pixel++ {
+		if math.Min(float64(pixel+1), hi) > math.Max(float64(pixel), lo) {
+			result = append(result, rasterAxisSample{pixel: pixel, first: source})
+		}
+	}
+	buffer := make([]float64, len(result)*(limit-source))
+	for index := range result {
+		sample := &result[index]
+		left, right := (float64(sample.pixel)-offset)/scale, (float64(sample.pixel+1)-offset)/scale
+		if right < left {
+			left, right = right, left
+		}
+		n := limit - source
+		sample.weights, buffer = buffer[:n:n], buffer[n:]
+		for i := range sample.weights {
+			x := float64(source + i)
+			sample.weights[i] = math.Max(0, math.Min(x+1, right)-math.Max(x, left)) * math.Abs(scale)
+		}
+	}
+	return result
+}
+
 // rasterImageHorizontal 按源列复用像素，保留各目标像素的权重累加顺序与中间精度
 // 入参: row 横向缓冲, src 源像素, samples 采样表, y 源行坐标
 func rasterImageHorizontal(row []rasterImagePixel, src image.RGBA64Image, samples []rasterAxisSample, y int) {
@@ -0,0 +1,17 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+var Version string
@@ -28,6 +28,18 @@ import (
 	"github.com/xiaoqidun/pdfgo"
 )

+// StencilImage 按当前填充色读取模板图像，不分配整幅彩色样本
+type StencilImage struct {
+	Source image.Image
+	Fill   color.NRGBA64
+}
+
+// NativeImage 按源像素输出原生过程色，不分配完整显示颜色缓冲
+type NativeImage struct {
+	Source *pdfgo.ImageProcess
+	Space  *pdfgo.ColorSpace
+}
+
 // EncodeCMYKTIFF 将直接四色图像保存为十六位无损TIFF，不经过显示颜色转换
 // 入参: ctx 取消上下文, source PDF源图像
 // 返回: []byte 含ICC和非预乘透明度的TIFF，非四色图像为nil, error 解码或编码错误
@@ -143,18 +155,6 @@ func EncodeCMYKTIFF(ctx context.Context, source *pdfgo.Image) ([]byte, error) {
 	return data, nil
 }

-// StencilImage 按当前填充色读取模板图像，不分配整幅彩色样本
-type StencilImage struct {
-	Source image.Image
-	Fill   color.NRGBA64
-}
-
-// NativeImage 按源像素输出原生过程色，不分配完整显示颜色缓冲
-type NativeImage struct {
-	Source *pdfgo.ImageProcess
-	Space  *pdfgo.ColorSpace
-}
-
 // ColorModel 保留填充色和模板的有效采样精度
 // 返回: color.Model 非预乘颜色模型
 func (s *StencilImage) ColorModel() color.Model {
@@ -22,6 +22,40 @@ import (
 	"github.com/xiaoqidun/pdfgo"
 )

+// NormalizeDate 校验PDF日期，非严格模式修正单层外括号及完整时区偏移的分隔符
+// 入参: text PDF日期字符串, strict 是否严格校验
+// 返回: string 标准日期字符串, error 日期错误
+func NormalizeDate(text string, strict bool) (string, error) {
+	if text == "" {
+		return text, nil
+	}
+	_, err := pdfgo.ParseDate(text)
+	if err == nil || strict {
+		return text, err
+	}
+	normalized := text
+	if strings.HasPrefix(normalized, "(") && strings.HasSuffix(normalized, ")") {
+		normalized = normalized[1 : len(normalized)-1]
+		if _, parseErr := pdfgo.ParseDate(normalized); parseErr == nil {
+			return normalized, nil
+		}
+	}
+	offset := len(normalized) - 5
+	if offset < 6 || normalized[offset] != '+' && normalized[offset] != '-' {
+		return text, err
+	}
+	for _, digit := range normalized[offset+1:] {
+		if digit < '0' || digit > '9' {
+			return text, err
+		}
+	}
+	normalized = normalized[:offset+3] + "'" + normalized[offset+3:] + "'"
+	if _, parseErr := pdfgo.ParseDate(normalized); parseErr != nil {
+		return text, err
+	}
+	return normalized, nil
+}
+
 // MetadataDate 保留当地日历日期，PDF省略时区按GMT，XMP省略日或时区时不推算
 // 入参: text 来源日期, xmp 是否为XMP日期
 // 返回: time.Time 解析值, bool 是否精确到日, bool 是否可比较绝对时间, error 日期错误
@@ -0,0 +1,375 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pdf
+
+import (
+	"bytes"
+	"compress/zlib"
+	"context"
+	"encoding/hex"
+	"fmt"
+	"image"
+	"io"
+	"maps"
+	"math"
+	"slices"
+	"strconv"
+	"strings"
+
+	"github.com/xiaoqidun/pdfgo"
+)
+
+// PrintPlacement 保存源PDF页索引及毫米纸面上的变换和裁剪
+type PrintPlacement struct {
+	Page   int
+	Matrix [6]float64
+	Clip   [4]float64
+}
+
+// PrintSheet 保存一个纸面的物理尺寸、放置内容和辅助线
+type PrintSheet struct {
+	Width, Height  float64
+	Placements     []PrintPlacement
+	Lines          [][4]float64
+	Label          string
+	LabelX, LabelY float64
+}
+
+// printPDFObjects 写出自有打印对象，原PDF资源仅复制实际引用的部分
+type printPDFObjects struct {
+	ctx     context.Context
+	objects []pdfgo.Object
+	copied  map[pdfgo.Reference]pdfgo.Reference
+	source  *pdfgo.Reader
+}
+
+// printPDFNumbers 编码内容流数值，不使用PDF语法不接受的科学记数法
+// 入参: out 内容流缓冲区, values 待编码数值
+func printPDFNumbers(out *bytes.Buffer, values ...float64) {
+	for _, value := range values {
+		out.WriteString(strconv.FormatFloat(value, 'f', -1, 64))
+		out.WriteByte(' ')
+	}
+}
+
+// add 登记一个独立输出对象
+// 入参: object 待登记对象
+// 返回: pdfgo.Reference 输出对象引用
+func (p *printPDFObjects) add(object pdfgo.Object) pdfgo.Reference {
+	p.objects = append(p.objects, object)
+	return pdfgo.Reference{Number: int64(len(p.objects))}
+}
+
+// copy 递归复制资源并改写引用，保留流编码及资源共享
+// 入参: object 待复制对象, depth 当前递归深度
+// 返回: pdfgo.Object 改写引用后的对象, error 资源、嵌套或取消错误
+func (p *printPDFObjects) copy(object pdfgo.Object, depth int) (pdfgo.Object, error) {
+	if err := p.ctx.Err(); err != nil {
+		return nil, err
+	}
+	if depth > 256 {
+		return nil, fmt.Errorf("print PDF resource nesting too deep")
+	}
+	switch value := object.(type) {
+	case pdfgo.Reference:
+		if next, ok := p.copied[value]; ok {
+			return next, nil
+		}
+		next := p.add(nil)
+		p.copied[value] = next
+		resolved, err := p.source.Object(value)
+		if err != nil {
+			return nil, err
+		}
+		copied, err := p.copy(resolved, depth+1)
+		if err != nil {
+			return nil, err
+		}
+		p.objects[next.Number-1] = copied
+		return next, nil
+	case pdfgo.Dictionary:
+		result := make(pdfgo.Dictionary, len(value))
+		for key, item := range value {
+			copied, err := p.copy(item, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			result[key] = copied
+		}
+		return result, nil
+	case pdfgo.Array:
+		result := make(pdfgo.Array, len(value))
+		for i, item := range value {
+			copied, err := p.copy(item, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			result[i] = copied
+		}
+		return result, nil
+	case *pdfgo.Stream:
+		dict := maps.Clone(value.Dictionary)
+		delete(dict, "Length")
+		copied, err := p.copy(dict, depth+1)
+		if err != nil {
+			return nil, err
+		}
+		return &pdfgo.Stream{Dictionary: copied.(pdfgo.Dictionary), Data: value.Data}, nil
+	default:
+		return object, nil
+	}
+}
+
+// WritePrintPDF 将源页面作为独立表单放置，保持矢量、文字、资源及透明组
+// 入参: ctx 输出上下文, writer 输出流, source 源PDF数据, sheets 有序纸面
+// 返回: error 资源、编码、写入或取消错误
+func WritePrintPDF(ctx context.Context, writer io.Writer, source []byte, sheets []PrintSheet) error {
+	var reader *pdfgo.Reader
+	if len(source) > 0 {
+		var err error
+		reader, err = pdfgo.NewReader(bytes.NewReader(source), int64(len(source)))
+		if err != nil {
+			return err
+		}
+		defer reader.Close()
+	}
+	p := &printPDFObjects{ctx: ctx, objects: make([]pdfgo.Object, 2), copied: make(map[pdfgo.Reference]pdfgo.Reference), source: reader}
+	var pages []*pdfgo.Page
+	if reader != nil {
+		if err := reader.WalkPages(ctx, func(_ int, page *pdfgo.Page) error { pages = append(pages, page); return nil }); err != nil {
+			return err
+		}
+	}
+	forms := make(map[int]pdfgo.Reference)
+	var children pdfgo.Array
+	const pt = 72.0 / 25.4
+	for _, sheet := range sheets {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+		var content bytes.Buffer
+		objects := make(pdfgo.Dictionary)
+		for _, placement := range sheet.Placements {
+			if placement.Page < 0 || placement.Page >= len(pages) {
+				return fmt.Errorf("print PDF page outside source")
+			}
+			page := pages[placement.Page]
+			if page.Rotation != 0 || page.UserUnit != 1 {
+				return fmt.Errorf("print PDF backend must normalize page rotation and units")
+			}
+			form, ok := forms[placement.Page]
+			if !ok {
+				resources, err := p.copy(page.Resources, 0)
+				if err != nil {
+					return err
+				}
+				var data bytes.Buffer
+				if _, err := page.WriteContent(ctx, &data); err != nil {
+					return err
+				}
+				box := page.MediaBox
+				dict := pdfgo.Dictionary{"Type": pdfgo.Name("XObject"), "Subtype": pdfgo.Name("Form"), "FormType": pdfgo.Integer(1), "BBox": pdfgo.Array{pdfgo.Real(box.XMin), pdfgo.Real(box.YMin), pdfgo.Real(box.XMax), pdfgo.Real(box.YMax)}, "Resources": resources}
+				if group := page.Dictionary["Group"]; group != nil {
+					copied, err := p.copy(group, 0)
+					if err != nil {
+						return err
+					}
+					dict["Group"] = copied
+				}
+				form = p.add(&pdfgo.Stream{Dictionary: dict, Data: data.Bytes()})
+				forms[placement.Page] = form
+			}
+			name := pdfgo.Name(fmt.Sprintf("P%d", placement.Page))
+			objects[name] = form
+			c, m := placement.Clip, placement.Matrix
+			hs := (page.MediaBox.YMax - page.MediaBox.YMin) / pt
+			x0, y0 := page.MediaBox.XMin, page.MediaBox.YMin
+			content.WriteString("q ")
+			printPDFNumbers(&content, c[0]*pt, (sheet.Height-c[1]-c[3])*pt, c[2]*pt, c[3]*pt)
+			content.WriteString("re W n ")
+			printPDFNumbers(&content, m[0], -m[1], -m[2], m[3], (m[2]*hs+m[4])*pt-m[0]*x0+m[2]*y0, (sheet.Height-m[3]*hs-m[5])*pt+m[1]*x0-m[3]*y0)
+			fmt.Fprintf(&content, "cm /%s Do Q\n", name)
+		}
+		for _, line := range sheet.Lines {
+			content.WriteString("q 0 G ")
+			printPDFNumbers(&content, 0.15*pt)
+			content.WriteString("w ")
+			printPDFNumbers(&content, line[0]*pt, (sheet.Height-line[1])*pt)
+			content.WriteString("m ")
+			printPDFNumbers(&content, line[2]*pt, (sheet.Height-line[3])*pt)
+			content.WriteString("l S Q\n")
+		}
+		resources := pdfgo.Dictionary{"XObject": objects}
+		if sheet.Label != "" {
+			content.WriteString("q 0 g BT /Label 7.94 Tf 1 0 0 1 ")
+			printPDFNumbers(&content, sheet.LabelX*pt, (sheet.Height-sheet.LabelY)*pt)
+			content.WriteString("Tm ")
+			if err := printPDFObject(&content, pdfgo.String(sheet.Label), 0); err != nil {
+				return err
+			}
+			content.WriteString(" Tj ET Q\n")
+			resources["Font"] = pdfgo.Dictionary{"Label": pdfgo.Dictionary{"Type": pdfgo.Name("Font"), "Subtype": pdfgo.Name("Type1"), "BaseFont": pdfgo.Name("Helvetica")}}
+		}
+		stream := p.add(&pdfgo.Stream{Dictionary: pdfgo.Dictionary{}, Data: content.Bytes()})
+		children = append(children, p.add(pdfgo.Dictionary{"Type": pdfgo.Name("Page"), "Parent": pdfgo.Reference{Number: 2}, "MediaBox": pdfgo.Array{pdfgo.Integer(0), pdfgo.Integer(0), pdfgo.Real(sheet.Width * pt), pdfgo.Real(sheet.Height * pt)}, "Resources": resources, "Contents": stream}))
+	}
+	return p.write(writer, children)
+}
+
+// WritePrintImages 逐纸面消费光栅结果，不在输出对象中保留未压缩像素
+// 入参: ctx 输出上下文, writer 输出流, sheets 有序纸面, render 按索引渲染纸面
+// 返回: error 渲染、编码、写入或取消错误
+func WritePrintImages(ctx context.Context, writer io.Writer, sheets []PrintSheet, render func(int) (image.Image, error)) error {
+	p := &printPDFObjects{ctx: ctx, objects: make([]pdfgo.Object, 2)}
+	var children pdfgo.Array
+	const pt = 72.0 / 25.4
+	for i, sheet := range sheets {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+		img, err := render(i)
+		if err != nil {
+			return err
+		}
+		var data bytes.Buffer
+		compressed := zlib.NewWriter(&data)
+		b := img.Bounds()
+		row := make([]byte, b.Dx()*3)
+		for y := b.Min.Y; y < b.Max.Y; y++ {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
+			for x := b.Min.X; x < b.Max.X; x++ {
+				r, g, blue, _ := img.At(x, y).RGBA()
+				offset := (x - b.Min.X) * 3
+				row[offset], row[offset+1], row[offset+2] = byte(r>>8), byte(g>>8), byte(blue>>8)
+			}
+			if _, err := compressed.Write(row); err != nil {
+				return err
+			}
+		}
+		if err := compressed.Close(); err != nil {
+			return err
+		}
+		picture := p.add(&pdfgo.Stream{Dictionary: pdfgo.Dictionary{"Type": pdfgo.Name("XObject"), "Subtype": pdfgo.Name("Image"), "Width": pdfgo.Integer(b.Dx()), "Height": pdfgo.Integer(b.Dy()), "ColorSpace": pdfgo.Name("DeviceRGB"), "BitsPerComponent": pdfgo.Integer(8), "Filter": pdfgo.Name("FlateDecode")}, Data: data.Bytes()})
+		var content bytes.Buffer
+		content.WriteString("q ")
+		printPDFNumbers(&content, sheet.Width*pt, 0, 0, sheet.Height*pt, 0, 0)
+		content.WriteString("cm /I Do Q\n")
+		stream := p.add(&pdfgo.Stream{Dictionary: pdfgo.Dictionary{}, Data: content.Bytes()})
+		children = append(children, p.add(pdfgo.Dictionary{"Type": pdfgo.Name("Page"), "Parent": pdfgo.Reference{Number: 2}, "MediaBox": pdfgo.Array{pdfgo.Integer(0), pdfgo.Integer(0), pdfgo.Real(sheet.Width * pt), pdfgo.Real(sheet.Height * pt)}, "Resources": pdfgo.Dictionary{"XObject": pdfgo.Dictionary{"I": picture}}, "Contents": stream}))
+	}
+	return p.write(writer, children)
+}
+
+// write 写出完整对象表和交叉引用，失败时由调用方丢弃输出
+// 入参: writer 输出流, children 页面对象引用
+// 返回: error 编码、写入或取消错误
+func (p *printPDFObjects) write(writer io.Writer, children pdfgo.Array) error {
+	p.objects[0] = pdfgo.Dictionary{"Type": pdfgo.Name("Catalog"), "Pages": pdfgo.Reference{Number: 2}}
+	p.objects[1] = pdfgo.Dictionary{"Type": pdfgo.Name("Pages"), "Count": pdfgo.Integer(len(children)), "Kids": children}
+	var out bytes.Buffer
+	out.WriteString("%PDF-1.7\n%\xe2\xe3\xcf\xd3\n")
+	offsets := make([]int, len(p.objects))
+	for i, object := range p.objects {
+		if err := p.ctx.Err(); err != nil {
+			return err
+		}
+		offsets[i] = out.Len()
+		fmt.Fprintf(&out, "%d 0 obj\n", i+1)
+		if err := printPDFObject(&out, object, 0); err != nil {
+			return err
+		}
+		out.WriteString("\nendobj\n")
+	}
+	xref := out.Len()
+	fmt.Fprintf(&out, "xref\n0 %d\n0000000000 65535 f \n", len(offsets)+1)
+	for _, offset := range offsets {
+		fmt.Fprintf(&out, "%010d 00000 n \n", offset)
+	}
+	fmt.Fprintf(&out, "trailer\n<</Size %d/Root 1 0 R>>\nstartxref\n%d\n%%%%EOF\n", len(offsets)+1, xref)
+	return Write(p.ctx, out.Bytes(), writer, WriteOptions{})
+}
+
+// printPDFObject 编码已复制的标准PDF对象，名称和字符串按字节转义
+// 入参: out 对象缓冲区, object 待编码对象, depth 当前递归深度
+// 返回: error 类型或嵌套错误
+func printPDFObject(out *bytes.Buffer, object pdfgo.Object, depth int) error {
+	if depth > 256 {
+		return fmt.Errorf("print PDF object nesting too deep")
+	}
+	switch value := object.(type) {
+	case nil:
+		out.WriteString("null")
+	case pdfgo.Boolean:
+		fmt.Fprintf(out, "%t", value)
+	case pdfgo.Integer:
+		fmt.Fprintf(out, "%d", value)
+	case pdfgo.Real:
+		if math.IsNaN(float64(value)) || math.IsInf(float64(value), 0) {
+			return fmt.Errorf("invalid print PDF number")
+		}
+		out.WriteString(strconv.FormatFloat(float64(value), 'f', -1, 64))
+	case pdfgo.Reference:
+		fmt.Fprintf(out, "%d %d R", value.Number, value.Generation)
+	case pdfgo.Name:
+		out.WriteByte('/')
+		for _, b := range []byte(value) {
+			if b <= 32 || b >= 127 || strings.ContainsRune("()<>[]{}/%#", rune(b)) {
+				fmt.Fprintf(out, "#%02X", b)
+			} else {
+				out.WriteByte(b)
+			}
+		}
+	case pdfgo.String:
+		out.WriteByte('<')
+		out.WriteString(hex.EncodeToString(value))
+		out.WriteByte('>')
+	case pdfgo.Array:
+		out.WriteByte('[')
+		for _, item := range value {
+			if err := printPDFObject(out, item, depth+1); err != nil {
+				return err
+			}
+			out.WriteByte(' ')
+		}
+		out.WriteByte(']')
+	case pdfgo.Dictionary:
+		out.WriteString("<<")
+		for _, key := range slices.Sorted(maps.Keys(value)) {
+			if err := printPDFObject(out, key, depth+1); err != nil {
+				return err
+			}
+			out.WriteByte(' ')
+			if err := printPDFObject(out, value[key], depth+1); err != nil {
+				return err
+			}
+			out.WriteByte('\n')
+		}
+		out.WriteString(">>")
+	case *pdfgo.Stream:
+		dict := maps.Clone(value.Dictionary)
+		dict["Length"] = pdfgo.Integer(len(value.Data))
+		if err := printPDFObject(out, dict, depth+1); err != nil {
+			return err
+		}
+		out.WriteString("\nstream\n")
+		out.Write(value.Data)
+		out.WriteString("\nendstream")
+	default:
+		return fmt.Errorf("unsupported print PDF object %T", object)
+	}
+	return nil
+}
@@ -24,8 +24,10 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"maps"
 	"math"
 	"reflect"
+	"runtime"
 	"strings"
 	"sync"

@@ -63,12 +65,17 @@ type NativeOutputTarget struct {
 	Base, Name  string
 }

-// NativeEngine 保存独立会话，不同实例可并行，同一实例的回调不可重入Call或Close
+// NativeEngine 保存独立会话，页面渲染可并行，修改等待已开始的只读任务完成
+// 同一实例的回调不可重入Call或Close
 // hooks应在首次Call前配置，Resolve返回的资源需保持有效直到相应会话关闭
 type NativeEngine struct {
 	businessEngine
+	// Resources 协调会话的计算与缓存，需在首次Call前配置
+	Resources *ofdgo.Resources
 	// ConversionPool 协调不同会话的批量转换资源
 	ConversionPool *ofdgo.ConversionPool
+	// RenderParallelism 限制同时渲染的页面数，零值使用可用处理器数
+	RenderParallelism int
 	// Resolve 按授权标识提供资源读取源
 	Resolve NativeResolver
 	// LoadFont 按名称读取系统字体数据
@@ -84,6 +91,11 @@ type NativeEngine struct {
 	once          sync.Once
 	saves         sync.WaitGroup
 	closed        bool
+	renderMu      sync.Mutex
+	renderCount   int
+	renderDone    chan struct{}
+	renderSlots   chan struct{}
+	renderIdle    []*Session
 }

 // nativeReader 在会话当前操作上下文中分块读取，不捕获已结束请求的上下文
@@ -139,12 +151,29 @@ func NewNativeEngine(resolve NativeResolver) *NativeEngine { return &NativeEngin
 func (e *NativeEngine) Call(ctx context.Context, name string, args []any, emit func(any)) (result map[string]any) {
 	e.once.Do(func() {
 		e.gate = make(chan struct{}, 1)
+		e.renderSlots = make(chan struct{}, e.renderParallelism())
 		e.resolveInput = e.input
 		e.conversionPool = e.ConversionPool
+		e.resources = e.Resources
 	})
 	if ctx == nil {
 		ctx = context.Background()
 	}
+	if name == "ofdgoRenderPage" {
+		select {
+		case e.renderSlots <- struct{}{}:
+			defer func() { <-e.renderSlots }()
+		case <-ctx.Done():
+			return nativeFailure(ctx.Err())
+		}
+		if e.resources != nil {
+			release, err := e.resources.Acquire(ctx, 64<<20)
+			if err != nil {
+				return nativeFailure(err)
+			}
+			defer release()
+		}
+	}
 	select {
 	case e.gate <- struct{}{}:
 	case <-ctx.Done():
@@ -162,6 +191,89 @@ func (e *NativeEngine) Call(ctx context.Context, name string, args []any, emit f
 	if e.closed {
 		return nativeFailure(fmt.Errorf("native engine is closed"))
 	}
+	if name == "ofdgoRenderPage" && e.currentSession != nil && e.pdf == nil {
+		defer func() {
+			if failure := recover(); failure != nil {
+				result = nativeFailure(fmt.Errorf("%v", failure))
+			}
+		}()
+		worker, err := e.renderSession(ctx)
+		if err != nil {
+			return nativeFailure(err)
+		}
+		operation := &businessEngine{currentSession: worker, currentEditor: e.currentEditor, ctx: ctx}
+		values := make([]platformValue, len(args))
+		for i, arg := range args {
+			values[i] = platformValueOf(arg)
+		}
+		if len(values) > 0 && operation.currentEditor != nil {
+			pageErr := e.prepareRender(operation, values[0].Int())
+			if pageErr != nil {
+				return nativeFailure(pageErr)
+			}
+		}
+		operation.currentEditor = nil
+		e.renderMu.Lock()
+		if e.renderCount == 0 {
+			e.renderDone = make(chan struct{})
+		}
+		e.renderCount++
+		e.renderMu.Unlock()
+		<-e.gate
+		locked = false
+		defer func() {
+			worker.Renderer.OutputContext = context.Background()
+			e.renderMu.Lock()
+			if result != nil && result["ok"] == true && ctx.Err() == nil {
+				e.currentSession.svgFonts = maps.Clone(worker.svgFonts)
+				clear(worker.pageCache)
+				worker.textCache.Clear()
+				clear(worker.svgFonts)
+				e.renderIdle = append(e.renderIdle, worker)
+			}
+			e.renderCount--
+			if e.renderCount == 0 {
+				close(e.renderDone)
+			}
+			e.renderMu.Unlock()
+		}()
+		data, err := operation.safeCall(operation.renderPage, values)
+		if err != nil {
+			return nativeFailure(err)
+		}
+		result = nativePlain(data).(map[string]any)
+		if result["ok"] != true {
+			return result
+		}
+		page := result["data"].(map[string]any)
+		known := make(map[string]bool)
+		if len(args) > 4 {
+			for i := 0; i < values[4].Length(); i++ {
+				known[values[4].Index(i).String()] = true
+			}
+		}
+		for _, value := range page["fonts"].([]any) {
+			font := value.(map[string]any)
+			if name := font["name"].(string); !known[name] {
+				font["data"] = worker.svgFonts[name]
+			}
+		}
+		if e.currentEditor != nil && !(len(values) > 6 && values[6].Bool()) {
+			objects, textErr := e.renderObjects(operation, values[0].Int())
+			if textErr != nil {
+				return nativeFailure(textErr)
+			}
+			page["objects"] = nativePlain(objects)
+		}
+		if err := ctx.Err(); err != nil {
+			return nativeFailure(err)
+		}
+		return result
+	}
+	if err := e.waitRenders(ctx); err != nil {
+		return nativeFailure(err)
+	}
+	e.renderIdle = nil
 	if name == "ofdgoSaveSnapshot" {
 		snapshot := e.saveSnapshot
 		e.saveSnapshot = nil
@@ -198,7 +310,14 @@ func (e *NativeEngine) Call(ctx context.Context, name string, args []any, emit f
 	if fn == nil {
 		return nativeFailure(fmt.Errorf("unknown operation: %s", name))
 	}
+	if err := e.checkDocument(name); err != nil {
+		return nativeFailure(err)
+	}
 	call := &nativeCall{engine: e, ctx: ctx, emit: emit}
+	if e.pdf != nil {
+		e.pdf.progress = platformValueOf(call.progress("conversion", "", true))
+		e.pdf.font = platformValueOf(nativeCallback(call.font))
+	}
 	defer func() {
 		if err := call.abort(); err != nil {
 			if result == nil || result["ok"] == true {
@@ -216,6 +335,9 @@ func (e *NativeEngine) Call(ctx context.Context, name string, args []any, emit f
 	for i, arg := range prepared {
 		values[i] = platformValueOf(arg)
 	}
+	if err := e.preparePDF(name, values); err != nil {
+		return nativeFailure(err)
+	}
 	data, err := e.safeCall(fn, values)
 	if err != nil {
 		return nativeFailure(err)
@@ -236,10 +358,18 @@ func (e *NativeEngine) Call(ctx context.Context, name string, args []any, emit f

 // Close 释放会话，不关闭宿主持有的ReaderAt资源
 func (e *NativeEngine) Close() error {
-	e.once.Do(func() { e.gate = make(chan struct{}, 1); e.resolveInput = e.input })
+	e.once.Do(func() {
+		e.gate = make(chan struct{}, 1)
+		e.renderSlots = make(chan struct{}, e.renderParallelism())
+		e.resolveInput = e.input
+	})
 	e.gate <- struct{}{}
 	defer func() { <-e.gate }()
 	e.closed = true
+	e.clearPDF()
+	_, _ = e.discardPrint(nil)
+	_ = e.waitRenders(context.Background())
+	e.renderIdle = nil
 	e.saveSnapshot = nil
 	e.saves.Wait()
 	var err error
@@ -249,11 +379,91 @@ func (e *NativeEngine) Close() error {
 	if e.pendingImport != nil {
 		err = errors.Join(err, e.pendingImport.Close())
 	}
-	e.currentSession, e.currentEditor, e.pendingImport, e.copiedObjects, e.copiedStyle = nil, nil, nil, nil, nil
+	e.currentSession, e.currentEditor, e.pendingImport, e.copiedObjects, e.portableObjects, e.copiedStyle = nil, nil, nil, nil, nil, nil
 	return err
 }

-// Input 读取授权源并以宿主报告的大小为准
+// waitRenders 等待已开始的页面任务，取消等待不修改当前会话
+// 入参: ctx 等待上下文
+// 返回: error 取消错误
+func (e *NativeEngine) waitRenders(ctx context.Context) error {
+	e.renderMu.Lock()
+	done, count := e.renderDone, e.renderCount
+	e.renderMu.Unlock()
+	if count == 0 {
+		return ctx.Err()
+	}
+	select {
+	case <-done:
+		return ctx.Err()
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}
+
+// renderParallelism 返回首次调用时采用的页面并行数
+// 返回: int 同时运行的页面任务数
+func (e *NativeEngine) renderParallelism() int {
+	if e.RenderParallelism > 0 {
+		return e.RenderParallelism
+	}
+	return runtime.GOMAXPROCS(0)
+}
+
+// renderSession 复用独立只读会话，调用时已持有引擎门控
+// 入参: ctx 渲染上下文
+// 返回: *Session 渲染会话, error 准备错误
+func (e *NativeEngine) renderSession(ctx context.Context) (*Session, error) {
+	e.renderMu.Lock()
+	defer e.renderMu.Unlock()
+	if count := len(e.renderIdle); count > 0 {
+		worker := e.renderIdle[count-1]
+		e.renderIdle[count-1] = nil
+		e.renderIdle = e.renderIdle[:count-1]
+		worker.Renderer.OutputContext = ctx
+		return worker, nil
+	}
+	source := e.currentSession
+	renderer, err := source.Renderer.Fork(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return &Session{Reader: renderer.Reader, Renderer: renderer, doc: source.doc, fontFS: source.fontFS,
+		pageCache: make(map[int]*ofdgo.PageContent), boxCache: append([]pageBoxInfo(nil), source.boxCache...),
+		textCache: ofdgo.NewPageTextCache(sessionTextCacheBytes), svgFonts: make(map[string][]byte), editing: source.editing}, nil
+}
+
+// prepareRender 同步当前编辑页面的图元标识，避免并行访问编辑器缓存
+// 入参: operation 只读任务, index 页面索引
+// 返回: error 页面或取消错误
+func (e *NativeEngine) prepareRender(operation *businessEngine, index int) error {
+	e.renderMu.Lock()
+	defer e.renderMu.Unlock()
+	page, err := operation.currentEditor.Page(index)
+	if err != nil {
+		return err
+	}
+	return operation.syncEditorPageIDs(index, page)
+}
+
+// renderObjects 读取编辑图元信息，渲染状态由当前任务独立持有
+// 入参: operation 只读任务, index 页面索引
+// 返回: []any 图元信息, error 提取错误
+func (e *NativeEngine) renderObjects(operation *businessEngine, index int) ([]any, error) {
+	e.renderMu.Lock()
+	defer e.renderMu.Unlock()
+	operation.currentEditor = e.currentEditor
+	if !reflect.DeepEqual(e.currentEditor.Backends(), operation.currentSession.Renderer.Backends()) {
+		e.currentEditor.SetRenderBackends(operation.currentSession.Renderer.Backends())
+	}
+	text, err := operation.currentSession.PageText(index)
+	if err != nil {
+		return nil, err
+	}
+	return operation.editorObjects(index, text)
+}
+
+// input 读取授权源并以宿主报告的大小为准
 func (e *NativeEngine) input(ctx context.Context, value any) (io.ReaderAt, int64, error) {
 	if err := ctx.Err(); err != nil {
 		return nil, 0, err
@@ -755,7 +965,7 @@ func (c *nativeCall) prepare(name string, args []any) ([]any, error) {
 		return append(args, checkpoint), nil
 	case "ofdgoImportPages", "ofdgoImportDocuments", "ofdgoImportImages":
 		return append(args, c.progress("import", "", true)), nil
-	case "ofdgoConvertPDF":
+	case "ofdgoOpenPDF":
 		return append(args, c.progress("conversion", "", true), nativeCallback(c.font)), nil
 	case "ofdgoExportImages", "ofdgoExportPage", "ofdgoExportDocument", "ofdgoExportAttachment", "ofdgoExportResource", "ofdgoExportMedia", "ofdgoExportVersion", "ofdgoSaveDocument", "ofdgoSaveSigned":
 		if len(args) == 0 {
@@ -0,0 +1,141 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package webui
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+
+	"github.com/xiaoqidun/ofdgo"
+)
+
+// preparePrint 从当前编辑入口创建独立打印快照，业务选项由公开库统一校验
+// 入参: args 排版选项及可选输出任务标识
+// 返回: any 纸面布局, error 快照、权限或排版错误
+func (e *businessEngine) preparePrint(args []platformValue) (any, error) {
+	if e.currentSession == nil || len(args) == 0 {
+		return nil, fmt.Errorf("ofd document is not opened")
+	}
+	var options ofdgo.PrintOptions
+	if err := json.Unmarshal([]byte(platformJSON(args[0])), &options); err != nil {
+		return nil, err
+	}
+	ctx := e.operationContext()
+	if len(args) > 1 {
+		ctx = e.newOutputContext(args[1])
+	}
+	editor := e.currentEditor
+	if editor == nil {
+		var err error
+		editor, err = e.currentSession.Reader.EditorContext(ctx)
+		if err != nil {
+			return nil, err
+		}
+	}
+	source := e.currentSession.Renderer
+	dirs, fonts := source.FontSources()
+	document, err := editor.PreparePrint(ctx, options, ofdgo.WithRenderBackends(source.Backends()), ofdgo.WithFontDirs(dirs...), ofdgo.WithFontFS(fonts...))
+	if err != nil {
+		return nil, err
+	}
+	if e.printDocument != nil {
+		_ = e.printDocument.Close()
+	}
+	e.printDocument = document
+	data, err := json.Marshal(document.Layout())
+	if err != nil {
+		return nil, err
+	}
+	return successResult(platformParseJSON(data)), nil
+}
+
+// layoutPrint 在既有快照上调整排版，预览期间不重复复制源包
+// 入参: args 新排版选项及可选输出任务标识
+// 返回: any 新纸面布局, error 状态、权限或排版错误
+func (e *businessEngine) layoutPrint(args []platformValue) (any, error) {
+	if e.printDocument == nil || len(args) == 0 {
+		return nil, fmt.Errorf("print document is not prepared")
+	}
+	var options ofdgo.PrintOptions
+	if err := json.Unmarshal([]byte(platformJSON(args[0])), &options); err != nil {
+		return nil, err
+	}
+	ctx := e.operationContext()
+	if len(args) > 1 {
+		ctx = e.newOutputContext(args[1])
+	}
+	next, err := e.printDocument.Reconfigure(ctx, options)
+	if err != nil {
+		return nil, err
+	}
+	_ = e.printDocument.Close()
+	e.printDocument = next
+	data, err := json.Marshal(next.Layout())
+	if err != nil {
+		return nil, err
+	}
+	return successResult(platformParseJSON(data)), nil
+}
+
+// printSide 按需输出一个纸面，不使用阅读区缓存或缩略图
+// 入参: args 零基纸面索引及可选输出任务标识
+// 返回: any 内嵌资源的SVG纸面, error 状态或渲染错误
+func (e *businessEngine) printSide(args []platformValue) (any, error) {
+	if e.printDocument == nil || len(args) == 0 {
+		return nil, fmt.Errorf("print document is not prepared")
+	}
+	ctx := e.operationContext()
+	if len(args) > 1 {
+		ctx = e.newOutputContext(args[1])
+	}
+	var output bytes.Buffer
+	if err := e.printDocument.RenderSVG(ctx, args[0].Int(), &output); err != nil {
+		return nil, err
+	}
+	return successResult(map[string]any{"svg": output.String()}), nil
+}
+
+// printPDF 输出和预览相同的打印布局，便于另存或交给第三方打印系统
+// 入参: args 可选输出任务标识
+// 返回: any PDF数据及媒体类型, error 状态或输出错误
+func (e *businessEngine) printPDF(args []platformValue) (any, error) {
+	if e.printDocument == nil {
+		return nil, fmt.Errorf("print document is not prepared")
+	}
+	ctx := e.operationContext()
+	if len(args) > 0 {
+		ctx = e.newOutputContext(args[0])
+	}
+	var output bytes.Buffer
+	if err := e.printDocument.WritePDF(ctx, &output); err != nil {
+		return nil, err
+	}
+	return successResult(map[string]any{"bytes": bytesToJS(output.Bytes()), "mime": "application/pdf"}), nil
+}
+
+// discardPrint 释放当前打印快照，可重复调用
+// 入参: _ 保留的调用参数
+// 返回: any 空结果, error 资源释放错误
+func (e *businessEngine) discardPrint(_ []platformValue) (any, error) {
+	if e.printDocument != nil {
+		err := e.printDocument.Close()
+		e.printDocument = nil
+		if err != nil {
+			return nil, err
+		}
+	}
+	return successResult(nil), nil
+}
@@ -37,41 +37,102 @@ const (
 // platformValue 浏览器参数值
 type platformValue = js.Value

+// wasmEngines 管理共享资源的独立浏览器业务会话
+type wasmEngines struct {
+	resources *ofdgo.Resources
+	engines   map[string]*businessEngine
+}
+
 // RunWASM 注册浏览器WASM接口并阻塞运行
 func RunWASM() {
-	e := &businessEngine{}
-	asynchronous := map[string]bool{
-		"ofdgoDetectFormat":     true,
-		"ofdgoExportVersion":    true,
-		"ofdgoConvertPDF":       true,
-		"ofdgoConvertFile":      true,
-		"ofdgoPackFiles":        true,
-		"ofdgoExportPage":       true,
-		"ofdgoExportDocument":   true,
-		"ofdgoExportAttachment": true,
-		"ofdgoExportMedia":      true,
-		"ofdgoResources":        true,
-		"ofdgoExportResource":   true,
-		"ofdgoExportImages":     true,
-		"ofdgoImportImages":     true,
-		"ofdgoImportPages":      true,
-		"ofdgoImportDocuments":  true,
-		"ofdgoSaveDocument":     true,
-		"ofdgoPrepareSave":      true,
-		"ofdgoSaveSnapshot":     true,
-		"ofdgoSetEncryption":    true,
-		"ofdgoSaveSigned":       true,
-	}
-	for name, callback := range e.businessCommands() {
-		if asynchronous[name] {
-			registerAsyncCallback(name, callback)
-		} else {
-			registerCallback(name, callback)
-		}
-	}
+	resources, _ := ofdgo.NewResources(ofdgo.ResourceOptions{Parallelism: 1, MemoryLimit: 64 << 20, CacheBytes: 48 << 20, SnapshotBytes: 32 << 20})
+	engines := &wasmEngines{resources: resources, engines: make(map[string]*businessEngine)}
+	registerCallback("ofdgoEngineOpen", engines.open)
+	registerAsyncCallback("ofdgoEngineCall", engines.call)
+	registerCallback("ofdgoEngineClose", engines.close)
 	select {}
 }

+// open 创建具有稳定标识的独立业务会话
+// 入参: args 会话标识
+// 返回: any 空结果, error 参数或会话错误
+func (w *wasmEngines) open(args []js.Value) (any, error) {
+	if len(args) != 1 || args[0].Type() != js.TypeString || args[0].String() == "" {
+		return nil, fmt.Errorf("missing engine ID")
+	}
+	id := args[0].String()
+	if w.engines[id] != nil {
+		return nil, fmt.Errorf("engine already exists: %s", id)
+	}
+	w.engines[id] = &businessEngine{resources: w.resources}
+	return nil, nil
+}
+
+// call 按会话标识分派业务命令，统一绑定本次调用的取消上下文
+// 入参: args 会话标识、命令、取消检查点及业务参数
+// 返回: any 业务结果, error 调用错误
+func (w *wasmEngines) call(args []js.Value) (any, error) {
+	if len(args) < 3 || args[0].Type() != js.TypeString || args[1].Type() != js.TypeString {
+		return nil, fmt.Errorf("missing engine ID or operation")
+	}
+	e := w.engines[args[0].String()]
+	if e == nil {
+		return nil, fmt.Errorf("unknown engine: %s", args[0].String())
+	}
+	name := args[1].String()
+	fn := e.businessCommands()[name]
+	if fn == nil {
+		return nil, fmt.Errorf("unknown operation: %s", name)
+	}
+	if err := e.checkDocument(name); err != nil {
+		return nil, err
+	}
+	e.ctx = context.Background()
+	if args[2].Type() == js.TypeFunction {
+		e.ctx = e.newOutputContext(args[2])
+	}
+	ctx := e.ctx
+	if name != "ofdgoSaveSnapshot" && e.currentSession != nil {
+		e.currentSession.Renderer.OutputContext = ctx
+	}
+	defer func() {
+		if e.ctx == ctx {
+			e.ctx = nil
+		}
+		if name != "ofdgoSaveSnapshot" && e.currentSession != nil {
+			e.currentSession.Renderer.OutputContext = context.Background()
+		}
+	}()
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
+	if err := e.preparePDF(name, args[3:]); err != nil {
+		return nil, err
+	}
+	return fn(args[3:])
+}
+
+// close 释放会话的文档、编辑器、导入及剪贴板，不关闭共享资源
+// 入参: args 会话标识
+// 返回: any 空结果, error 参数或关闭错误
+func (w *wasmEngines) close(args []js.Value) (any, error) {
+	if len(args) != 1 || args[0].Type() != js.TypeString || args[0].String() == "" {
+		return nil, fmt.Errorf("missing engine ID")
+	}
+	id := args[0].String()
+	e := w.engines[id]
+	if e == nil {
+		return nil, nil
+	}
+	delete(w.engines, id)
+	_, _ = e.discardPrint(nil)
+	e.clearPDF()
+	e.clearImport()
+	err := e.currentSession.Close()
+	*e = businessEngine{}
+	return nil, err
+}
+
 // awaitExport 等待浏览器处理导出检查点
 // 入参: fn 浏览器回调, args 回调参数
 // 返回: error 写入错误或取消原因
@@ -221,8 +282,11 @@ func platformParseJSON(data []byte) map[string]any {
 	return result
 }

-// inputFromValue 读取浏览器二进制源
+// inputFromValue 读取浏览器随机输入或二进制数据
 func (e *businessEngine) inputFromValue(value platformValue) (*ofdgo.Input, error) {
+	if value.Type() == platformTypeObject && !value.IsNull() && value.Get("read").Type() == platformTypeFunction {
+		return ofdgo.NewInput(&browserReaderAt{read: value.Get("read"), size: int64(value.Get("size").Float())}, int64(value.Get("size").Float()))
+	}
 	data, err := e.bytesFromJS(value)
 	if err != nil {
 		return nil, err
@@ -20,6 +20,7 @@ import (
 	"bytes"
 	"context"
 	"crypto/rand"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -28,19 +29,22 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"runtime"
 	"sort"
 	"strconv"
 	"strings"
 	"sync"
+	"time"

 	"github.com/xiaoqidun/guigo"
 	"github.com/xiaoqidun/ofdgo"
 	webuiassets "github.com/xiaoqidun/ofdgo/assets/webui"
+	"github.com/xiaoqidun/ofdgo/internal/build"
 	"github.com/xiaoqidun/ofdgo/internal/webui"
 )

-// applicationID 标识原生应用，与版本及可执行文件路径无关
-const applicationID = "me.aite.ofdgo"
+const applicationVersionURL = "https://ofdgo.aite.me/"
+const applicationDownloadURL = "https://ofdgo.aite.me/releases/"

 // Host 连接桌面系统能力和共用文档业务
 type Host struct {
@@ -49,7 +53,9 @@ type Host struct {
 	files          *fileStore
 	engines        map[string]*webui.NativeEngine
 	engineStops    map[string]func() bool
+	closingEngines map[string]*engineClose
 	conversionPool *ofdgo.ConversionPool
+	resources      *ofdgo.Resources
 	cancels        map[string]context.CancelFunc
 	batchResults   map[string]any
 	fontOnce       sync.Once
@@ -57,6 +63,24 @@ type Host struct {
 	fontFiles      map[string]string
 	fontError      error
 	pendingPaths   []string
+	launchMu       sync.Mutex
+	launchActivate bool
+	launchClosed   bool
+	launchPending  int
+	frontendReady  bool
+	closeAllowed   bool
+}
+
+// associationState 保存单个范围的登记状态和查询错误
+type associationState struct {
+	guigo.AssociationStatus
+	Error string `json:"error,omitempty"`
+}
+
+// engineClose 保存并发关闭共享的完成通知及结果
+type engineClose struct {
+	done chan struct{}
+	err  error
 }

 // resourceReader 保存资源读取位置及关闭操作
@@ -73,19 +97,52 @@ func Run(ctx context.Context, paths []string, dataDir string) error {
 	if err != nil {
 		return err
 	}
+	paths = append([]string(nil), paths...)
+	for index, path := range paths {
+		paths[index], err = filepath.Abs(path)
+		if err != nil {
+			return err
+		}
+	}
+	h := &Host{pendingPaths: paths}
+	data, err := json.Marshal(paths)
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(options.UserDataDir, 0700); err != nil {
+		return err
+	}
+	key, err := instanceDirectory(options.UserDataDir)
+	if err != nil {
+		return err
+	}
+	instance, err := guigo.OpenWindowInstance(ctx, "OFDGo:"+key, data, h.receiveLaunch)
+	if err != nil || instance == nil {
+		return err
+	}
+	defer instance.Close()
+	options.Instance = instance
 	files, err := newFileStore()
 	if err != nil {
 		return err
 	}
-	h := &Host{files: files, engines: make(map[string]*webui.NativeEngine), cancels: make(map[string]context.CancelFunc), fontFiles: make(map[string]string), pendingPaths: append([]string(nil), paths...)}
-	h.conversionPool, err = ofdgo.NewConversionPool(ofdgo.ConversionPoolOptions{AvailableMemory: conversionMemory})
+	h.files = files
+	h.engines = make(map[string]*webui.NativeEngine)
+	h.cancels = make(map[string]context.CancelFunc)
+	h.fontFiles = make(map[string]string)
+	cacheBytes := int64(256 << 20)
+	if memory := conversionMemory; memory != nil {
+		cacheBytes = max(32<<20, memory()/8)
+	}
+	h.resources, err = ofdgo.NewResources(ofdgo.ResourceOptions{CacheBytes: cacheBytes, AvailableMemory: conversionMemory})
 	if err != nil {
 		files.close()
 		return err
 	}
+	h.conversionPool = h.resources.ConversionPool()
 	defer h.close()
 	bindings := make(map[string]guigo.HandlerFunc)
-	for _, name := range []string{"engine.open", "engine.close", "engine.call", "engine.start", "engine.cancel", "engine.finish", "batch", "open", "save", "directory", "file", "release", "child", "remove", "write.begin", "write.data", "write.commit", "write.abort", "fonts", "ready", "title"} {
+	for _, name := range []string{"engine.open", "engine.close", "engine.call", "engine.start", "engine.cancel", "engine.finish", "batch", "open", "save", "directory", "file", "release", "drop.release", "child", "remove", "write.begin", "write.data", "write.commit", "write.abort", "fonts", "ready", "launch.done", "title", "window.info", "window.drag", "window.close", "update.check", "update.open", "association.query", "association.register", "association.remove", "print.capabilities", "print.dialog", "print.printers", "print.query", "print.properties", "print"} {
 		bindings["ofdgo.host."+name] = func(ctx context.Context, args any) (any, error) { return h.call(ctx, name, args) }
 	}
 	static := http.FileServerFS(webuiassets.NativeFS)
@@ -99,6 +156,7 @@ func Run(ctx context.Context, paths []string, dataDir string) error {
 			return
 		}
 		w.Header().Set("Cache-Control", "no-store")
+		w.Header().Set("X-OFDGo-Build-Version", build.Version)
 		static.ServeHTTP(w, r)
 	})
 	options.Handler = handler
@@ -110,6 +168,9 @@ func Run(ctx context.Context, paths []string, dataDir string) error {
 		h.mu.Unlock()
 	}
 	options.OnClose = func() {
+		h.launchMu.Lock()
+		h.launchClosed = true
+		h.launchMu.Unlock()
 		h.mu.Lock()
 		for _, cancel := range h.cancels {
 			cancel()
@@ -117,6 +178,18 @@ func Run(ctx context.Context, paths []string, dataDir string) error {
 		h.mu.Unlock()
 	}
 	options.OnDrop = h.openPaths
+	options.OnTitleBarChanged = func(info guigo.TitleBarInfo) {
+		h.emit("ofdgo.window", info)
+	}
+	options.OnClosing = func(ctx context.Context) bool {
+		h.mu.Lock()
+		allowed := h.closeAllowed || !h.frontendReady
+		h.mu.Unlock()
+		if !allowed {
+			h.emit("ofdgo.closing", nil)
+		}
+		return allowed
+	}
 	options.OnError = func(err error) {
 		h.emit("ofdgo.error", err.Error())
 	}
@@ -180,6 +253,7 @@ func (h *Host) resource(r *http.Request) (*guigo.Resource, error) {
 		contentType = http.DetectContentType(header)
 	}
 	headers := http.Header{"Content-Type": {contentType}, "Content-Length": {strconv.FormatInt(size, 10)}, "Cache-Control": {"no-store"}, "Accept-Ranges": {"bytes"}}
+	headers.Set("X-OFDGo-Build-Version", build.Version)
 	start, length, status := int64(0), size, http.StatusOK
 	if value := r.Header.Get("Range"); value != "" && r.Method == http.MethodGet {
 		if !strings.HasPrefix(value, "bytes=") || strings.Contains(value, ",") {
@@ -239,19 +313,91 @@ func (h *Host) emit(name string, value any) {
 // openPaths 将操作系统提供的文件登记后交给界面
 // 入参: names 文件路径列表
 func (h *Host) openPaths(names []string) {
+	_ = h.sendPaths(names, "ofdgo.files")
+}
+
+// sendPaths 将文件登记后发送到指定界面入口
+// 入参: names 文件路径列表, event 界面事件名称
+// 返回: error 投递错误
+func (h *Host) sendPaths(names []string, event string) error {
 	files := make([]any, 0, len(names))
 	for _, name := range names {
-		handle, err := h.files.add(name, false)
+		file, err := h.files.addDrop(name)
 		if err != nil {
 			h.emit("ofdgo.error", err.Error())
 			continue
 		}
-		file, err := h.files.file(handle["nativeHandle"].(string))
-		if err == nil {
-			files = append(files, file)
+		files = append(files, file)
+	}
+	h.mu.Lock()
+	w := h.window
+	h.mu.Unlock()
+	var err error
+	if w == nil {
+		err = guigo.ErrClosed
+	} else {
+		err = w.Emit(event, files)
+	}
+	if err == nil {
+		return nil
+	}
+	for _, file := range files {
+		h.files.discardDrop(file.(map[string]any)["nativeFile"].(string))
+	}
+	return err
+}
+
+// receiveLaunch 接收已有进程转交的文件及激活请求
+// 入参: ctx 请求上下文, data 文件路径消息
+// 返回: error 接收错误
+func (h *Host) receiveLaunch(ctx context.Context, data []byte) error {
+	var paths []string
+	if err := json.Unmarshal(data, &paths); err != nil {
+		return err
+	}
+	for _, path := range paths {
+		if !filepath.IsAbs(path) {
+			return errors.New("file path must be absolute")
 		}
 	}
-	h.emit("ofdgo.files", files)
+	h.launchMu.Lock()
+	defer h.launchMu.Unlock()
+	if h.launchClosed {
+		return guigo.ErrClosed
+	}
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	h.pendingPaths = append(h.pendingPaths, paths...)
+	h.launchActivate = true
+	return h.flushLaunch()
+}
+
+// flushLaunch 在界面就绪后按接收顺序投递外部打开请求，调用方持有launchMu
+// 返回: error 投递错误
+func (h *Host) flushLaunch() error {
+	h.mu.Lock()
+	ready, window := h.frontendReady, h.window
+	h.mu.Unlock()
+	if !ready || window == nil {
+		return nil
+	}
+	if h.launchActivate {
+		if err := window.Activate(); err != nil {
+			return err
+		}
+		h.launchActivate = false
+	}
+	if len(h.pendingPaths) == 0 {
+		return nil
+	}
+	paths := h.pendingPaths
+	h.pendingPaths = nil
+	if err := h.sendPaths(paths, "ofdgo.launch"); err != nil {
+		return err
+	}
+	h.launchPending++
+	return nil
 }

 // call 执行宿主协议并保留业务结果结构
@@ -265,9 +411,54 @@ func (h *Host) call(ctx context.Context, name string, value any) (any, error) {
 	text := func(key string) string { value, _ := args[key].(string); return value }
 	flag := func(key string) bool { value, _ := args[key].(bool); return value }
 	switch name {
+	case "print.capabilities", "print.dialog", "print.printers", "print.query", "print.properties", "print":
+		h.mu.Lock()
+		window := h.window
+		h.mu.Unlock()
+		if window == nil {
+			return nil, fmt.Errorf("窗口尚未就绪")
+		}
+		if name == "print.capabilities" {
+			return window.PrintCapabilities(ctx)
+		}
+		if name == "print.dialog" {
+			return nil, window.ShowPrintUI(ctx, text("kind"))
+		}
+		if name == "print.printers" {
+			return window.ListPrinters(ctx)
+		}
+		if name == "print.properties" {
+			return nil, window.ShowPrinterProperties(ctx, text("printer"))
+		}
+		data, err := json.Marshal(args)
+		if err != nil {
+			return nil, err
+		}
+		var options guigo.PrintOptions
+		if err := json.Unmarshal(data, &options); err != nil {
+			return nil, err
+		}
+		profile, err := window.QueryPrinter(ctx, options)
+		if err != nil {
+			return nil, err
+		}
+		if name == "print.query" {
+			return profile, nil
+		}
+		if text("fingerprint") == "" || text("fingerprint") != profile.Fingerprint {
+			return nil, fmt.Errorf("打印机设置已变化，请重新预览")
+		}
+		return window.Print(ctx, options)
 	case "engine.open":
 		engine := webui.NewNativeEngine(h.files.resolve)
+		parallelism, cacheBytes := runtime.GOMAXPROCS(0), int64(128<<20)
+		if memory := conversionMemory; memory != nil {
+			available := memory()
+			cacheBytes = max(32<<20, available/32)
+		}
+		engine.RenderParallelism = parallelism
 		engine.ConversionPool = h.conversionPool
+		engine.Resources = h.resources
 		engine.OpenWriter = h.openWriter
 		engine.ReserveOutput = h.reserveOutput
 		engine.CleanupOutput = h.cleanupOutput
@@ -280,9 +471,17 @@ func (h *Host) call(ctx context.Context, name string, value any) (any, error) {
 		}
 		h.engineStops[id] = context.AfterFunc(guigo.PageContext(ctx), func() { _ = h.closeEngine(id) })
 		h.mu.Unlock()
-		return guigo.Result{Value: map[string]any{"engine": id}, Discard: func() { _ = h.closeEngine(id) }}, nil
+		return guigo.Result{Value: map[string]any{"engine": id, "parallelism": parallelism, "cacheBytes": cacheBytes}, Discard: func() { _ = h.closeEngine(id) }}, nil
 	case "batch":
 		return map[string]any{"parallelism": h.conversionPool.Parallelism()}, nil
+	case "update.check":
+		return applicationUpdate(ctx, build.Version, applicationVersionURL)
+	case "update.open":
+		return nil, guigo.OpenURL(applicationDownloadURL)
+	case "association.query":
+		return queryAssociations()
+	case "association.register", "association.remove":
+		return nil, changeAssociations(text("scope"), name == "association.remove")
 	case "engine.close":
 		return nil, h.closeEngine(text("engine"))
 	case "engine.finish":
@@ -441,6 +640,9 @@ func (h *Host) call(ctx context.Context, name string, value any) (any, error) {
 	case "release":
 		h.files.release(text("file"))
 		return nil, nil
+	case "drop.release":
+		h.files.discardDrop(text("file"))
+		return nil, nil
 	case "child":
 		value, err := h.files.child(text("handle"), text("name"), flag("directory"), flag("create"))
 		if errors.Is(err, os.ErrNotExist) {
@@ -492,19 +694,160 @@ func (h *Host) call(ctx context.Context, name string, value any) (any, error) {
 			return nil, nil
 		}
 		return nil, window.SetTitle(text("title"))
-	case "ready":
+	case "window.info", "window.drag", "window.close":
 		h.mu.Lock()
-		paths := h.pendingPaths
-		h.pendingPaths = nil
+		window := h.window
 		h.mu.Unlock()
-		if len(paths) != 0 {
-			h.openPaths(paths)
+		if window == nil {
+			return nil, fmt.Errorf("窗口尚未就绪")
 		}
+		if name == "window.info" {
+			return window.TitleBarInfo()
+		}
+		if name == "window.close" {
+			h.launchMu.Lock()
+			defer h.launchMu.Unlock()
+			if h.launchPending != 0 || len(h.pendingPaths) != 0 {
+				return false, nil
+			}
+			h.launchClosed = true
+			h.mu.Lock()
+			h.closeAllowed = true
+			h.mu.Unlock()
+			return true, window.Close()
+		}
+		values, ok := args["regions"].([]any)
+		if !ok {
+			return nil, fmt.Errorf("拖动区域无效")
+		}
+		regions := make([]guigo.Rect, 0, len(values))
+		for _, value := range values {
+			item, ok := value.(map[string]any)
+			if !ok {
+				return nil, fmt.Errorf("拖动区域无效")
+			}
+			x, xOK := item["x"].(float64)
+			y, yOK := item["y"].(float64)
+			width, widthOK := item["width"].(float64)
+			height, heightOK := item["height"].(float64)
+			if !xOK || !yOK || !widthOK || !heightOK {
+				return nil, fmt.Errorf("拖动区域无效")
+			}
+			regions = append(regions, guigo.Rect{X: x, Y: y, Width: width, Height: height})
+		}
+		return nil, window.SetDragRegions(regions)
+	case "launch.done":
+		h.launchMu.Lock()
+		if h.launchPending > 0 {
+			h.launchPending--
+		}
+		h.launchMu.Unlock()
 		return nil, nil
+	case "ready":
+		h.launchMu.Lock()
+		defer h.launchMu.Unlock()
+		h.mu.Lock()
+		h.frontendReady = true
+		h.mu.Unlock()
+		return nil, h.flushLaunch()
 	}
 	return nil, fmt.Errorf("未知宿主操作")
 }

+// associationOptions 提供Windows文件关联的固定应用配置
+// 返回: guigo.AssociationOptions 应用配置, error 路径错误
+func associationOptions() (guigo.AssociationOptions, error) {
+	executable, err := os.Executable()
+	if err != nil {
+		return guigo.AssociationOptions{}, err
+	}
+	return guigo.AssociationOptions{
+		AppID: "OFDGo", Name: "OFDGo", Description: "OFD、PDF阅读与编辑工具",
+		Executable: executable, Arguments: []string{"--"},
+		Types: []guigo.FileAssociation{
+			{ID: "OFD", Name: "OFD文档", Extensions: []string{".ofd"}},
+			{ID: "PDF", Name: "PDF文档", Extensions: []string{".pdf"}},
+		},
+	}, nil
+}
+
+// queryAssociations 分别查询两个范围，不因其中一个失败而隐藏另一个
+// 返回: any 两个范围的状态, error 配置错误
+func queryAssociations() (any, error) {
+	options, err := associationOptions()
+	if err != nil {
+		return nil, err
+	}
+	result := make(map[string]associationState)
+	for _, scope := range []guigo.AssociationScope{guigo.AssociationUser, guigo.AssociationMachine} {
+		state, err := guigo.QueryFileAssociations(options, scope)
+		row := associationState{AssociationStatus: state}
+		if err != nil {
+			row.Error = associationError(err).Error()
+		}
+		result[string(scope)] = row
+	}
+	return result, nil
+}
+
+// changeAssociations 执行固定应用配置的单范围注册或撤销
+// 入参: scope 作用范围, remove 是否撤销
+// 返回: error 操作错误
+func changeAssociations(scope string, remove bool) error {
+	options, err := associationOptions()
+	if err != nil {
+		return err
+	}
+	if remove {
+		err = guigo.UnregisterFileAssociations(options, guigo.AssociationScope(scope))
+	} else {
+		err = guigo.RegisterFileAssociations(options, guigo.AssociationScope(scope))
+	}
+	return associationError(err)
+}
+
+// associationError 区分未提升权限和实际访问失败，提供简短提示
+// 入参: err 操作错误
+// 返回: error 用户提示或原始错误
+func associationError(err error) error {
+	if errors.Is(err, guigo.ErrAssociationElevationRequired) {
+		return errors.New("需管理员权限")
+	}
+	if errors.Is(err, os.ErrPermission) {
+		return errors.New("无权访问")
+	}
+	return err
+}
+
+// applicationUpdate 比较官网和当前程序的完整构建版本
+// 入参: ctx 请求上下文, version 当前版本, endpoint 官网地址
+// 返回: bool 是否有更新, error 检查错误
+func applicationUpdate(ctx context.Context, version, endpoint string) (bool, error) {
+	if version == "" {
+		return false, nil
+	}
+	ctx, cancel := context.WithTimeout(ctx, 8*time.Second)
+	defer cancel()
+	request, err := http.NewRequestWithContext(ctx, http.MethodHead, endpoint, nil)
+	if err != nil {
+		return false, err
+	}
+	request.Header.Set("Cache-Control", "no-store")
+	response, err := http.DefaultClient.Do(request)
+	if err != nil {
+		return false, err
+	}
+	defer response.Body.Close()
+	if response.StatusCode != http.StatusOK {
+		return false, fmt.Errorf("检查更新失败: %s", response.Status)
+	}
+	latest := response.Header.Get("X-OFDGo-Build-Version")
+	if latest == "" {
+		return false, errors.New("缺少构建版本")
+	}
+	return latest != version, nil
+}
+
 // dialogFilters 将共用界面的文件类型映射到系统对话框
 // 入参: args 对话框参数
 // 返回: []guigo.FileFilter 文件类型列表
@@ -706,7 +1049,7 @@ func (h *Host) readFonts() {
 			continue
 		}
 		for _, face := range faces {
-			h.fonts = append(h.fonts, map[string]any{"index": face.Index, "postscriptName": face.PostScriptName, "fullName": face.FullName, "family": face.Family, "style": face.Style, "names": face.Names, "file": file})
+			h.fonts = append(h.fonts, map[string]any{"index": face.Index, "postscriptName": face.PostScriptName, "fullName": face.FullName, "family": face.Family, "style": face.Style, "names": face.Names, "menuFamily": face.MenuFamily, "menuStyle": face.MenuStyle, "familyKey": face.FamilyKey, "bold": face.Bold, "italic": face.Italic, "file": file})
 			for _, alias := range append([]string{face.FullName, face.Family, face.PostScriptName, strings.TrimSpace(face.Family + " " + face.Style)}, face.Names...) {
 				if alias != "" && h.fontFiles[alias+".ttf"] == "" {
 					h.fontFiles[alias+".ttf"] = name + "\x00" + strconv.Itoa(face.Index)
@@ -742,7 +1085,21 @@ func (h *Host) loadFont(ctx context.Context, name string) ([]byte, error) {
 func (h *Host) closeEngine(id string) error {
 	var results []any
 	h.mu.Lock()
+	if closing := h.closingEngines[id]; closing != nil {
+		h.mu.Unlock()
+		<-closing.done
+		return closing.err
+	}
 	engine := h.engines[id]
+	if engine == nil {
+		h.mu.Unlock()
+		return nil
+	}
+	closing := &engineClose{done: make(chan struct{})}
+	if h.closingEngines == nil {
+		h.closingEngines = make(map[string]*engineClose)
+	}
+	h.closingEngines[id] = closing
 	delete(h.engines, id)
 	if stop := h.engineStops[id]; stop != nil {
 		stop()
@@ -763,33 +1120,43 @@ func (h *Host) closeEngine(id string) error {
 	for _, result := range results {
 		h.discard(result)
 	}
-	if engine != nil {
-		return engine.Close()
-	}
-	return nil
+	err := engine.Close()
+	h.mu.Lock()
+	closing.err = err
+	delete(h.closingEngines, id)
+	close(closing.done)
+	h.mu.Unlock()
+	return err
 }

 // close 取消任务并释放当前窗口持有的会话
 func (h *Host) close() {
+	h.launchMu.Lock()
+	h.launchClosed = true
+	h.launchMu.Unlock()
 	h.mu.Lock()
 	for _, cancel := range h.cancels {
 		cancel()
 	}
-	engines := h.engines
+	engines := make([]string, 0, len(h.engines)+len(h.closingEngines))
+	for id := range h.engines {
+		engines = append(engines, id)
+	}
+	for id := range h.closingEngines {
+		engines = append(engines, id)
+	}
 	results := h.batchResults
 	h.batchResults = nil
-	for _, stop := range h.engineStops {
-		stop()
-	}
-	h.engineStops = nil
-	h.engines = make(map[string]*webui.NativeEngine)
 	h.mu.Unlock()
-	for _, engine := range engines {
-		_ = engine.Close()
+	for _, id := range engines {
+		_ = h.closeEngine(id)
 	}
 	for _, result := range results {
 		h.discard(result)
 	}
+	if h.resources != nil {
+		h.resources.Clear()
+	}
 	_ = h.files.close()
 }

@@ -797,12 +1164,18 @@ func (h *Host) close() {
 // 入参: dataDir 自定义浏览器数据目录
 // 返回: guigo.Options 窗口配置, error 配置错误
 func windowOptions(dataDir string) (guigo.Options, error) {
+	appID := "ofdgo"
+	cacheName := appID
+	if runtime.GOOS == "windows" {
+		appID = ""
+		cacheName = "OFDGo"
+	}
 	if dataDir == "" {
 		cache, err := os.UserCacheDir()
 		if err != nil {
 			return guigo.Options{}, err
 		}
-		dataDir = filepath.Join(cache, "OFDGo")
+		dataDir = filepath.Join(cache, cacheName)
 	}
 	dataDir, err := filepath.Abs(dataDir)
 	if err != nil {
@@ -813,8 +1186,15 @@ func windowOptions(dataDir string) (guigo.Options, error) {
 		return guigo.Options{}, err
 	}
 	return guigo.Options{
-		AppID:       applicationID,
-		Title:       "OFDGo - OFD编辑器",
+		AppID:    appID,
+		Title:    "OFDGo - OFD编辑器",
+		TitleBar: guigo.TitleBarContent,
+		TitleBarColors: guigo.TitleBarColors{
+			Background:         "#e8edf0",
+			Foreground:         "#1f2428",
+			InactiveBackground: "#eef1f4",
+			InactiveForeground: "#66737f",
+		},
 		Icon:        icon,
 		Width:       1440,
 		Height:      900,
@@ -47,6 +47,7 @@ type fileEntry struct {
 	saveTarget ofdgo.Output
 	readers    int
 	retired    bool
+	dropHandle string
 }

 // fileStore 管理窗口范围内的文件授权和临时数据
@@ -137,6 +138,59 @@ func (s *fileStore) add(name string, directory bool) (map[string]any, error) {
 	return s.descriptor(id), nil
 }

+// addDrop 登记拖放文件及读取快照，失败时撤销本次授权
+// 入参: name 拖放文件路径
+// 返回: map[string]any 文件描述, error 登记错误
+func (s *fileStore) addDrop(name string) (map[string]any, error) {
+	handle, err := s.add(name, false)
+	if err != nil {
+		return nil, err
+	}
+	id := handle["nativeHandle"].(string)
+	file, err := s.file(id)
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if err == nil && !s.closed {
+		if entry := s.entries[file["nativeFile"].(string)]; entry != nil && s.entries[id] != nil {
+			entry.dropHandle = id
+			file["drop"] = true
+			return file, nil
+		}
+		err = os.ErrNotExist
+	}
+	delete(s.entries, id)
+	if file != nil {
+		key := file["nativeFile"].(string)
+		if entry := s.entries[key]; entry != nil {
+			delete(s.entries, key)
+			if entry.file != nil {
+				entry.file.Close()
+			}
+		}
+	}
+	if err == nil {
+		err = os.ErrClosed
+	}
+	return nil, err
+}
+
+// discardDrop 撤销未接收的拖放文件及其授权，不删除源文件
+// 入参: id 拖放读取快照标识
+func (s *fileStore) discardDrop(id string) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	entry := s.entries[id]
+	if entry == nil || entry.dropHandle == "" {
+		return
+	}
+	delete(s.entries, entry.dropHandle)
+	delete(s.entries, id)
+	entry.retired = true
+	if entry.file != nil && entry.readers == 0 {
+		entry.file.Close()
+	}
+}
+
 // save 登记用户选择的输出路径
 // 入参: name 输出文件路径
 // 返回: map[string]any 句柄描述
@@ -279,17 +333,18 @@ func (s *fileStore) resource(id string) (io.ReaderAt, int64, func() error, error
 	return file, info.Size(), file.Close, nil
 }

-// release 释放内存结果或临时文件并取消页面清理回调
+// release 释放读取快照、内存结果或临时文件，保留在途读取及源文件
 // 入参: id 资源标识
 func (s *fileStore) release(id string) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
-	if entry := s.entries[id]; entry != nil && (entry.data != nil || entry.temporary) {
+	if entry := s.entries[id]; entry != nil && (entry.data != nil || entry.temporary || entry.file != nil) {
 		delete(s.entries, id)
+		entry.retired = true
 		if entry.stop != nil {
 			entry.stop()
 		}
-		if entry.file != nil {
+		if entry.file != nil && entry.readers == 0 {
 			entry.file.Close()
 		}
 		if entry.temporary {
@@ -0,0 +1,64 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package webview
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// conversionMemory 未提供系统内存探测时仅按并行数调度
+var conversionMemory func() int64
+
+// instanceDirectory 解析数据目录的实际路径，使符号链接复用同一实例
+// 入参: path 数据目录路径
+// 返回: string 规范路径, error 路径解析错误
+func instanceDirectory(path string) (string, error) {
+	return filepath.EvalSymlinks(path)
+}
+
+// fontNameLanguage 获取Linux区域设置对应的OpenType名称表标识
+// 返回: uint16 名称表平台标识, uint16 显示语言标识
+func fontNameLanguage() (uint16, uint16) {
+	locale := ""
+	for _, name := range []string{"LC_ALL", "LC_MESSAGES", "LANG"} {
+		if locale = os.Getenv(name); locale != "" {
+			break
+		}
+	}
+	locale = strings.ToLower(strings.ReplaceAll(locale, "-", "_"))
+	locale, _, _ = strings.Cut(locale, ".")
+	locale, _, _ = strings.Cut(locale, "@")
+	switch locale {
+	case "zh", "zh_cn", "zh_hans":
+		return 3, 0x0804
+	case "zh_hk":
+		return 3, 0x0c04
+	case "zh_mo":
+		return 3, 0x1404
+	case "zh_tw", "zh_hant":
+		return 3, 0x0404
+	case "zh_sg":
+		return 3, 0x1004
+	case "ja", "ja_jp":
+		return 3, 0x0411
+	case "ko", "ko_kr":
+		return 3, 0x0412
+	case "c", "posix", "en", "en_us":
+		return 3, 0x0409
+	}
+	return 0xffff, 0xffff
+}
@@ -12,13 +12,22 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

-//go:build !windows
+//go:build !windows && !linux

 package webview

+import "path/filepath"
+
 // conversionMemory 未提供系统内存探测时仅按并行数调度
 var conversionMemory func() int64

+// instanceDirectory 解析数据目录的实际路径
+// 入参: path 数据目录路径
+// 返回: string 规范路径, error 路径解析错误
+func instanceDirectory(path string) (string, error) {
+	return filepath.EvalSymlinks(path)
+}
+
 // fontNameLanguage 未指定系统显示语言时沿用字体名称表顺序
 // 返回: uint16 未指定平台标识, uint16 未指定语言标识
 func fontNameLanguage() (uint16, uint16) {
@@ -15,13 +15,39 @@
 package webview

 import (
+	"os"
+	"strings"
 	"syscall"
 	"unsafe"
+
+	"golang.org/x/sys/windows"
 )

 // memoryStatusProc 查询系统物理内存和提交额度
 var memoryStatusProc = syscall.NewLazyDLL("kernel32.dll").NewProc("GlobalMemoryStatusEx")

+// instanceDirectory 解析数据目录的实际路径，使目录联接及大小写别名复用同一实例
+// 入参: path 数据目录路径
+// 返回: string 规范路径, error 路径解析错误
+func instanceDirectory(path string) (string, error) {
+	dir, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
+	defer dir.Close()
+	buffer := make([]uint16, 256)
+	for {
+		n, err := windows.GetFinalPathNameByHandle(windows.Handle(dir.Fd()), &buffer[0], uint32(len(buffer)), 0)
+		if err != nil {
+			return "", err
+		}
+		if n < uint32(len(buffer)) {
+			return strings.ToLower(windows.UTF16ToString(buffer[:n])), nil
+		}
+		buffer = make([]uint16, n+1)
+	}
+}
+
 // fontNameLanguage 获取系统显示语言对应的OpenType名称表标识
 // 返回: uint16 名称表平台标识, uint16 系统显示语言标识
 func fontNameLanguage() (uint16, uint16) {
@@ -290,6 +290,9 @@ func NewReader(input *Input, options ...ReaderOption) (*Reader, error) {
 // 入参: reader 阅读器, opts 渲染选项
 // 返回: *Renderer 渲染器实例
 func NewRenderer(reader *Reader, opts ...RendererOption) *Renderer {
+	if reader.resources == nil {
+		reader.resources, _ = NewResources(ResourceOptions{})
+	}
 	r := &Renderer{
 		Reader:                reader,
 		DPI:                   300.0,
@@ -297,7 +300,7 @@ func NewRenderer(reader *Reader, opts ...RendererOption) *Renderer {
 		DrawParams:            reader.drawParamCache,
 		CompositeGraphicUnits: reader.compositeGraphicUnitCache,
 		templatePageCache:     make(map[string]*PageContent),
-		imageCache:            &renderCache[string, image.Image]{limit: imageCacheLimit},
+		imageCache:            resourceCache[string, image.Image](reader.resources, imageCacheLimit),
 		backends:              defaultRenderBackends(),
 		backendStates:         make(map[any]any),
 	}
@@ -70,6 +70,7 @@ type outputOptimization struct {
 	protected bool
 	completed int
 	deflater  *flate.Writer
+	resources *editorResourceSelection
 }

 // outputCompressionBuffer 限制候选ZIP编码，不能缩小时终止本次压缩
@@ -108,6 +109,7 @@ func (e *Editor) WriteToWithOptions(ctx context.Context, writer io.Writer, optio
 // 入参: ctx 取消上下文, writer 输出流, indexes 零基页码, options 输出配置
 // 返回: int64 已写入字节数, error 错误信息
 func (e *Editor) WritePagesTo(ctx context.Context, writer io.Writer, indexes []int, options WriteOptions) (int64, error) {
+	ctx = e.runtimeResources.context(ctx)
 	if err := ctx.Err(); err != nil {
 		return 0, err
 	}
@@ -125,6 +127,7 @@ func (e *Editor) WritePagesTo(ctx context.Context, writer io.Writer, indexes []i
 // 入参: ctx 取消上下文, options 输出配置
 // 返回: *Editor 输出快照, error 配置或资源错误
 func (e *Editor) outputSnapshot(ctx context.Context, options WriteOptions) (*Editor, error) {
+	ctx = e.runtimeResources.context(ctx)
 	if err := ctx.Err(); err != nil {
 		return nil, err
 	}
@@ -20,16 +20,12 @@ import (
 	"crypto/sha256"
 	"image"
 	"io"
-	"strconv"
 	"sync"

 	baseimage "github.com/xiaoqidun/ofdgo/internal/base/image"
 )

-// outputImageBatchLimit 限制并行任务持有的原始编码，超限图片单独处理
-const outputImageBatchLimit = 16 << 20
-
-// outputImageWorkingSetLimit 限制64位并行任务的像素工作量总估算，32位使用64MiB，超限图片单独处理
+// outputImageWorkingSetLimit 指定未提供任务预算时的图像成本估算上限
 const outputImageWorkingSetLimit = 256 << 20

 // outputImageJob 保存独立图片任务，不访问编辑文档或调用进度回调
@@ -82,20 +78,22 @@ func (e *Editor) outputImageOptions(key string) (CompressionOptions, image.Point
 // 入参: keys 资源路径, load 串行读取方法，空值表示跳过, results 候选缓存, sources 原始资源摘要，可为空
 // 返回: error 读取、进度或取消错误
 func (e *Editor) prepareOutputImages(keys []string, load func(string) ([]byte, error), results map[outputImageKey][]byte, sources map[string]outputImageSource) error {
-	workers := conversionWorkers(e.output.ctx, 4)
+	workers := conversionWorkers(e.output.ctx)
 	if workers < 2 || len(keys) < 2 {
 		return nil
 	}
-	limit, encodedLimit := outputImageWorkingSetLimit, outputImageBatchLimit
+	limit := int(min(int64(workers)*(64<<20), int64(int(^uint(0)>>1)-1)))
+	encodedLimit := limit
 	if pool, _ := e.output.ctx.Value(conversionPoolKey{}).(*ConversionPool); pool != nil {
-		if available := pool.memoryLimit(); available > 0 {
+		available := pool.memoryLimit()
+		if available == 0 {
+			return nil
+		}
+		if available > 0 {
 			limit = int(min(available, int64(int(^uint(0)>>1))))
 			encodedLimit = limit
 		}
 	}
-	if strconv.IntSize == 32 {
-		limit = 64 << 20
-	}
 	base, cancel := context.WithCancel(e.output.ctx)
 	ctx := outputImageContext{Context: base, parent: e.output.ctx}
 	var group sync.WaitGroup
@@ -52,6 +52,7 @@ type ConvertProgress struct {
 // PageRange使用一基页码表达式，与Pages互斥，空字符串表示全部页面
 // SkipUnchanged仅在未压缩、源格式与目标相同且未选页时不写出数据
 // Pool可由多个独立转换共享，nil时不限制文件间并发
+// Resources提供共享计算与缓存策略，显式Pool优先控制计算调度
 // 整份PDF同格式压缩直接重写PDF对象，其余PDF先转换为OFD对象再输出
 // RendererOptions同时用于PDF局部合成和输出，在PDF.RendererOptions之后应用
 // Backends统一配置转换与输出，优先于PDF和RendererOptions中的后端设置
@@ -60,6 +61,7 @@ type ConvertProgress struct {
 // PageOutput仅用于逐页格式，同步调用export写出一页并自行处理提交或回滚；此时output可为nil
 // 未提供PageOutput时，逐页格式打包ZIP；所有回调返回错误均会停止转换
 type ConvertOptions struct {
+	Resources       *Resources
 	Input           string
 	Format          string
 	Pages           []int
@@ -145,6 +147,13 @@ func OutputFormats() []OutputFormat {
 // 入参: ctx 取消上下文, input 输入源, output 输出流, options 转换选项
 // 返回: ConvertReport 转换报告, error 错误信息
 func Convert(ctx context.Context, input *Input, output io.Writer, options ConvertOptions) (report ConvertReport, err error) {
+	if options.Resources != nil {
+		if options.Pool == nil {
+			options.Pool = options.Resources.pool
+		}
+		options.ReaderOptions = append(slices.Clone(options.ReaderOptions), WithResources(options.Resources))
+		options.PDF.Resources = options.Resources
+	}
 	if options.Pool != nil {
 		if err = options.Pool.acquire(ctx, false, 0); err != nil {
 			return report, err
@@ -534,7 +543,7 @@ func (p *ConversionPool) acquire(ctx context.Context, image bool, size int64) er
 		p.mu.Lock()
 		allowed := p.active < p.options.Parallelism && (p.active == 0 || limit != 0)
 		if image {
-			allowed = p.images < runtime.GOMAXPROCS(0) && (p.images == 0 || limit < 0 || size <= limit-p.memory)
+			allowed = p.images < p.options.Parallelism && (p.images == 0 || limit < 0 || size <= limit-p.memory)
 		}
 		if allowed {
 			if image {
@@ -584,15 +593,15 @@ func (p *ConversionPool) release(image bool, size int64) {
 }

 // conversionWorkers 按当前文件数量分配内部计算任务
-// 入参: ctx 转换上下文, fallback 非共享模式并行上限
+// 入参: ctx 转换上下文
 // 返回: int 内部并行数
-func conversionWorkers(ctx context.Context, fallback int) int {
+func conversionWorkers(ctx context.Context) int {
 	p, _ := ctx.Value(conversionPoolKey{}).(*ConversionPool)
 	if p == nil {
-		return min(fallback, runtime.GOMAXPROCS(0))
+		return runtime.GOMAXPROCS(0)
 	}
 	p.mu.Lock()
 	active := p.active
 	p.mu.Unlock()
-	return max(1, runtime.GOMAXPROCS(0)/max(1, active))
+	return max(1, p.options.Parallelism/max(1, active))
 }
@@ -31,6 +31,14 @@ import (
 	"github.com/emmansun/gmsm/smx509"
 )

+// 加密错误可通过errors.Is识别，不包含口令或私钥
+var (
+	ErrCredentialsRequired      = errors.New("document credentials required")
+	ErrInvalidCredentials       = errors.New("invalid credentials or damaged encrypted document")
+	ErrUnsupportedEncryption    = errors.New("unsupported document encryption")
+	ErrEncryptionPolicyRequired = errors.New("explicit encryption policy required")
+)
+
 // Credentials 解密凭据，UserName用于筛选接收者，留空自动匹配，不参与口令派生；证书采用DER编码
 // Password与Decrypter分别用于口令和证书方案，私钥可由外部密码设备持有
 type Credentials struct {
@@ -51,7 +59,7 @@ type CryptoProvider interface {
 	EncryptKey(certificate, key []byte) ([]byte, error)
 }

-// ReaderOption 阅读器的凭据与密码提供者选项
+// ReaderOption 阅读器的凭据、密码提供者与资源选项
 type ReaderOption func(*readerOptions)

 // EncryptionRecipient 证书加密接收者，Certificate为SM2公钥证书的DER编码
@@ -84,6 +92,7 @@ type EncryptionInfo struct {

 // readerOptions 保存打开文档时的会话参数
 type readerOptions struct {
+	resources   *Resources
 	credentials []Credentials
 	provider    CryptoProvider
 }
@@ -97,14 +106,6 @@ type encryptionState struct {
 // GMCryptoProvider 使用纯Go国密实现，可在原生环境和WASM使用
 type GMCryptoProvider struct{}

-// 加密错误可通过errors.Is识别，不包含口令或私钥
-var (
-	ErrCredentialsRequired      = errors.New("document credentials required")
-	ErrInvalidCredentials       = errors.New("invalid credentials or damaged encrypted document")
-	ErrUnsupportedEncryption    = errors.New("unsupported document encryption")
-	ErrEncryptionPolicyRequired = errors.New("explicit encryption policy required")
-)
-
 // WithCredentials 添加解密凭据，多次调用可解开多层加密
 // 入参: credentials 解密凭据
 // 返回: ReaderOption 阅读选项
@@ -113,6 +113,7 @@ func (r *Reader) open(options []ReaderOption) error {
 	for _, option := range options {
 		option(&settings)
 	}
+	r.resources = settings.resources
 	if settings.provider == nil {
 		settings.provider = GMCryptoProvider{}
 	}
@@ -46,36 +46,41 @@ const editorPathValidationLimit = 1024
 // 阶段可重复，准备完成不代表保存成功
 // 回调不可重入修改编辑器，可返回context.Canceled等调用方停止原因
 type Editor struct {
-	OnWriteProgress  func(stage string, completed, total int) error
-	Info             DocInfo
-	pages            []PageContent
-	resources        []editorResource
-	fonts            map[string]*FontResource
-	fontRegistration editorFontRegistration
-	fontDirs         []string
-	fontFS           []fs.FS
-	fontRenderer     *Renderer
-	fontSourcesCache *fontSourceCache
-	fontMetrics      map[string]FontMetrics
-	backends         RenderBackends
-	images           map[string]image.Point
-	resourceID       map[editorResourceKey]string
-	maxID            int
-	history          []editorChange
-	historyIndex     int
-	historyLimit     int
-	revision         uint64
-	serial           uint64
-	source           *editorSource
-	origins          map[string]*editorObjectOrigin
-	removedPages     map[string]bool
-	structureRemaps  map[string][]map[string]string
-	outlines         []byte
-	encryption       *encryptionState
-	output           *outputOptimization
-	saveTarget       Output
-	validatedPaths   *renderCache[string, bool]
-	richIndex        *richTextIndex
+	OnWriteProgress    func(stage string, completed, total int) error
+	Info               DocInfo
+	pages              []PageContent
+	resources          []editorResource
+	runtimeResources   *Resources
+	fonts              map[string]*FontResource
+	fontRegistration   editorFontRegistration
+	fontDirs           []string
+	fontFS             []fs.FS
+	fontRenderer       *Renderer
+	fontSourcesCache   *fontSourceCache
+	fontMetrics        map[string]FontMetrics
+	backends           RenderBackends
+	images             map[string]image.Point
+	resourceID         map[editorResourceKey]string
+	maxID              int
+	history            []editorChange
+	historyIndex       int
+	historyLimit       int
+	revision           uint64
+	serial             uint64
+	source             *editorSource
+	origins            map[string]*editorObjectOrigin
+	removedPages       map[string]bool
+	structureRemaps    map[string][]map[string]string
+	outlines           []byte
+	encryption         *encryptionState
+	output             *outputOptimization
+	saveTarget         Output
+	snapshotArchive    *editorSnapshotArchive
+	validatedPaths     *renderCache[string, bool]
+	changes            EditorChanges
+	transactionChanges *EditorChanges
+	objectIndex        *editorObjectIndex
+	richIndex          *richTextIndex
 }

 // editorResource 文档内嵌资源
@@ -153,11 +158,13 @@ func (e *Editor) Backends() RenderBackends {
 // NewEditor 创建空白文档，保存前至少添加一页
 // 返回: *Editor 文档编辑器
 func NewEditor() *Editor {
+	resources, _ := NewResources(ResourceOptions{})
 	var id [16]byte
 	rand.Read(id[:])
 	id[6] = id[6]&0x0f | 0x40
 	id[8] = id[8]&0x3f | 0x80
 	return &Editor{
+		runtimeResources: resources,
 		Info: DocInfo{
 			DocID:        hex.EncodeToString(id[:]),
 			CreationDate: time.Now().Format("2006-01-02"),
@@ -171,6 +178,30 @@ func NewEditor() *Editor {
 	}
 }

+// SetResources 替换后续操作的资源策略，需与编辑操作串行调用
+// 已创建的阅读器和快照继续使用原策略，不修改文档或撤销记录
+// 入参: resources 共享策略，nil使用默认策略
+func (e *Editor) SetResources(resources *Resources) {
+	if resources == nil {
+		resources, _ = NewResources(ResourceOptions{})
+	}
+	if resources == e.runtimeResources {
+		return
+	}
+	e.runtimeResources = resources
+	e.snapshotArchive = nil
+	e.fontRenderer = nil
+	e.fontSourcesCache = newFontSourceCache(resources)
+	e.validatedPaths = nil
+	if e.source != nil {
+		source := *e.source
+		e.source = &source
+		e.source.reader = cloneEditorReader(e.source.reader)
+		e.source.reader.resources = resources
+		e.source.reader.pageContents = resourceCache[pageContentKey, PageContent](resources, 16<<20)
+	}
+}
+
 // PageCount 获取当前页数
 // 返回: int 页数
 func (e *Editor) PageCount() int {
@@ -195,7 +226,14 @@ func (e *Editor) SetInfo(info DocInfo) {
 // 入参: index 页面索引
 // 返回: *PageContent 页面内容, error 错误信息
 func (e *Editor) Page(index int) (*PageContent, error) {
-	page, err := e.page(index)
+	return e.PageContext(context.Background(), index)
+}
+
+// PageContext 获取独立页面副本，读取、解析及整理对象时响应取消
+// 入参: ctx 取消上下文, index 页面索引
+// 返回: *PageContent 页面内容, error 读取或取消错误
+func (e *Editor) PageContext(ctx context.Context, index int) (*PageContent, error) {
+	page, err := e.pageContext(ctx, index)
 	if err != nil {
 		return nil, err
 	}
@@ -205,9 +243,11 @@ func (e *Editor) Page(index int) (*PageContent, error) {
 		layer := &result.Content.Layer[i]
 		layer.TextObject, layer.PathObject, layer.ImageObject, layer.CompositeGraphicUnit = nil, nil, nil, nil
 		for _, object := range layer.Objects {
+			if err := ctx.Err(); err != nil {
+				return nil, err
+			}
 			switch object.Type {
 			case "TextObject":
-				object.TextObject.layout = nil
 				layer.TextObject = append(layer.TextObject, object.TextObject)
 			case "PathObject":
 				layer.PathObject = append(layer.PathObject, object.PathObject)
@@ -590,7 +630,9 @@ func (e *Editor) Object(page int, id string) (GraphicObject, error) {
 	}
 	object, err := cloneEditorObject(layer.Objects[index])
 	object.origin = e.objectOrigin(id)
-	e.attachRichTextSnapshot(page, &object)
+	if err := e.attachRichTextSnapshot(page, &object); err != nil {
+		return GraphicObject{}, err
+	}
 	return object, err
 }

@@ -758,13 +800,7 @@ func (e *Editor) LayoutText(obj *TextObject, value string, options TextLayout) e
 	if err != nil {
 		return err
 	}
-	if err := LayoutText(obj, value, options, metrics); err != nil {
-		return err
-	}
-	if obj.layout == nil && e.objectOrigin(obj.ID) != nil {
-		obj.layout = &textLayout{value: obj.Text(), options: options}
-	}
-	return nil
+	return LayoutText(obj, value, options, metrics)
 }

 // newRenderer 使用编辑器字体来源和完整后端配置创建资源度量器
@@ -772,7 +808,7 @@ func (e *Editor) LayoutText(obj *TextObject, value string, options TextLayout) e
 // 返回: *Renderer 度量器
 func (e *Editor) newRenderer(reader *Reader) *Renderer {
 	if e.fontSourcesCache == nil {
-		e.fontSourcesCache = newFontSourceCache()
+		e.fontSourcesCache = newFontSourceCache(e.runtimeResources)
 	}
 	renderer := NewRenderer(reader, WithFontDirs(e.fontDirs...), WithFontFS(e.fontFS...), WithRenderBackends(e.backends))
 	renderer.fontSourcesCache = e.fontSourcesCache.child()
@@ -792,11 +828,21 @@ func (r editorResource) definition() string {
 // 入参: index 页面索引
 // 返回: *PageContent 页面内容, error 错误信息
 func (e *Editor) page(index int) (*PageContent, error) {
+	return e.pageContext(context.Background(), index)
+}
+
+// pageContext 按索引加载内部页面并响应取消
+// 入参: ctx 取消上下文, index 页面索引
+// 返回: *PageContent 页面内容, error 读取或取消错误
+func (e *Editor) pageContext(ctx context.Context, index int) (*PageContent, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
 	if index < 0 || index >= len(e.pages) {
 		return nil, fmt.Errorf("page index %d out of range", index)
 	}
 	if e.source != nil {
-		if err := e.loadSourcePage(index); err != nil {
+		if err := e.loadSourcePageContext(ctx, index); err != nil {
 			return nil, err
 		}
 	}
@@ -844,13 +890,8 @@ func (e *Editor) findObject(page int, id string) (*Layer, int, error) {
 	if err != nil {
 		return nil, 0, err
 	}
-	for i := range content.Content.Layer {
-		layer := &content.Content.Layer[i]
-		for index, object := range layer.Objects {
-			if editorObjectID(object) == id && id != "" {
-				return layer, index, nil
-			}
-		}
+	if position, ok := e.objectPositions(content)[id]; ok {
+		return &content.Content.Layer[position.layer], position.index, nil
 	}
 	return nil, 0, fmt.Errorf("object %q not found on page %d", id, page)
 }
@@ -1324,7 +1365,7 @@ func (v *editorValidation) creationPath(value string) error {
 // 返回: *renderCache[string, bool] 校验缓存
 func (e *Editor) pathValidationCache() *renderCache[string, bool] {
 	if e.validatedPaths == nil {
-		e.validatedPaths = &renderCache[string, bool]{limit: 8 << 20}
+		e.validatedPaths = resourceCache[string, bool](e.runtimeResources, 8<<20)
 	}
 	return e.validatedPaths
 }
@@ -101,7 +101,7 @@ func (e *Editor) SetPageActions(index int, actions []Action) error {
 	}
 	before, after := cloneEditorData(page.Actions), cloneEditorData(actions)
 	page.Actions = cloneEditorData(after)
-	if change := e.recordChange(); change != nil {
+	if change := e.recordChange(index); change != nil {
 		change.undo = func(e *Editor) { e.pages[index].Actions = cloneEditorData(before) }
 		change.redo = func(e *Editor) { e.pages[index].Actions = cloneEditorData(after) }
 	}
@@ -32,6 +32,7 @@ type AnnotationSelection struct {
 	data      [][]byte
 	resources []string
 	states    map[string]map[string]editorCompositeState
+	richText  map[int]*richTextSnapshot
 }

 // Annotations 获取指定页面的注解信息，包含不可见注解，返回值与编辑器相互独立
@@ -317,7 +318,7 @@ func (e *Editor) CaptureAnnotations(page int, ids []string) (*AnnotationSelectio
 	if err != nil {
 		return nil, err
 	}
-	selection := &AnnotationSelection{editor: e, document: e.documentIdentity(), states: make(map[string]map[string]editorCompositeState)}
+	selection := &AnnotationSelection{editor: e, document: e.documentIdentity(), states: make(map[string]map[string]editorCompositeState), richText: make(map[int]*richTextSnapshot)}
 	seen := make(map[string]bool)
 	for _, id := range ids {
 		key := editorResourceID(id)
@@ -336,6 +337,17 @@ func (e *Editor) CaptureAnnotations(page int, ids []string) (*AnnotationSelectio
 		if !editorXMLCopyable(root) {
 			return nil, fmt.Errorf("annotation contains unsupported identifiers")
 		}
+		annotation, err := e.Annotation(page, id)
+		if err != nil {
+			return nil, err
+		}
+		snapshot, err := e.captureRichTextSnapshot(page, GraphicObject{Type: "CompositeGraphicUnit", CompositeGraphicUnit: CompositeGraphicUnit{Objects: annotation.Appearance.Objects}})
+		if err != nil {
+			return nil, err
+		}
+		if snapshot != nil {
+			selection.richText[len(selection.data)] = snapshot
+		}
 		selection.data = append(selection.data, data)
 		selection.states[key] = maps.Clone(e.source.annotationStates[e.pages[page].ID+"/"+key])
 	}
@@ -452,7 +464,20 @@ func (e *Editor) PasteAnnotations(page int, selection *AnnotationSelection, dx,
 						break
 					}
 				}
-				return edit.commitAnnotationParts(edit.source, map[string][]byte{name: editorPatchXML(data, []editorXMLPatch{{position, position, added}})})
+				if err := edit.commitAnnotationParts(edit.source, map[string][]byte{name: editorPatchXML(data, []editorXMLPatch{{position, position, added}})}); err != nil {
+					return err
+				}
+			}
+		}
+		for i, id := range result {
+			if snapshot := selection.richText[i]; snapshot != nil {
+				annotation, err := edit.Annotation(page, id)
+				if err != nil {
+					return err
+				}
+				if err := edit.putRichTextSnapshot(page, GraphicObject{Type: "CompositeGraphicUnit", CompositeGraphicUnit: CompositeGraphicUnit{Objects: annotation.Appearance.Objects}}, snapshot); err != nil {
+					return err
+				}
 			}
 		}
 		return nil
@@ -30,6 +30,36 @@ type editorObjectPosition struct {
 	index int
 }

+// editorObjectIndex 复用最近页面的只读对象位置，图层容器替换后重新建立
+type editorObjectIndex struct {
+	layers    []Layer
+	positions map[string]editorObjectPosition
+}
+
+// objectPositions 获取页面的对象位置索引，重复编号保留第一个匹配
+// 入参: page 内部只读页面
+// 返回: map[string]editorObjectPosition 只读索引
+func (e *Editor) objectPositions(page *PageContent) map[string]editorObjectPosition {
+	layers := page.Content.Layer
+	if len(layers) == 0 {
+		return nil
+	}
+	if cached := e.objectIndex; cached != nil && len(cached.layers) == len(layers) && &cached.layers[0] == &layers[0] {
+		return cached.positions
+	}
+	positions := make(map[string]editorObjectPosition)
+	for i, layer := range layers {
+		for j, object := range layer.Objects {
+			id := editorObjectID(object)
+			if _, exists := positions[id]; id != "" && !exists {
+				positions[id] = editorObjectPosition{i, j}
+			}
+		}
+	}
+	e.objectIndex = &editorObjectIndex{layers: layers, positions: positions}
+	return positions
+}
+
 // ObjectPosition 对象在图层或页块直接成员中的位置，Index从0开始，Count不含嵌套页块的对象
 type ObjectPosition struct {
 	Layer     string
@@ -66,7 +96,9 @@ func (e *Editor) Objects(page int, ids []string) ([]GraphicObject, error) {
 			return nil, err
 		}
 		objects[i].origin = e.objectOrigin(editorObjectID(object))
-		e.attachRichTextSnapshot(page, &objects[i])
+		if err := e.attachRichTextSnapshot(page, &objects[i]); err != nil {
+			return nil, err
+		}
 	}
 	return objects, nil
 }
@@ -105,7 +137,11 @@ func (e *Editor) CopyObjectsContext(ctx context.Context, page int, objects []Gra
 				if err := ctx.Err(); err != nil {
 					return err
 				}
-				if err := e.putRichTextMetadata(page, ids[i], meta, -1); err != nil {
+				object, err := e.Object(page, ids[i])
+				if err != nil {
+					return err
+				}
+				if err := e.putRichTextSnapshot(page, object, meta); err != nil {
 					return err
 				}
 			}
@@ -709,7 +745,7 @@ func (e *Editor) replaceLayers(page int, layers []Layer) {
 func (e *Editor) replacePreparedLayers(page int, after []Layer) {
 	if e.historyLimit == 0 {
 		e.pages[page].Content.Layer = after
-		e.recordChange()
+		e.recordChange(page)
 		return
 	}
 	before := copyEditorPage(e.pages[page])
@@ -738,7 +774,7 @@ func (e *Editor) replacePreparedLayers(page int, after []Layer) {
 		e.pages[page].Content.Layer = copyEditorPage(PageContent{Content: Content{Layer: layers}}).Content.Layer
 	}
 	apply(e, after)
-	if change := e.recordChange(); change != nil {
+	if change := e.recordChange(page); change != nil {
 		change.undo = func(e *Editor) { apply(e, before.Content.Layer) }
 		change.redo = func(e *Editor) { apply(e, after) }
 	}
@@ -835,6 +871,15 @@ func (e *Editor) updateObjectOrigins(page int, objects []GraphicObject, preserve
 		return nil
 	}
 	apply := func(e *Editor, objects []GraphicObject, origins map[string]*editorObjectOrigin) {
+		layers := slices.Clone(e.pages[page].Content.Layer)
+		cloned := make(map[int]bool)
+		for _, index := range indexes {
+			if !cloned[index.layer] {
+				layers[index.layer].Objects = slices.Clone(layers[index.layer].Objects)
+				cloned[index.layer] = true
+			}
+		}
+		e.pages[page].Content.Layer = layers
 		for i, index := range indexes {
 			e.pages[page].Content.Layer[index.layer].Objects[index.index] = objects[i]
 		}
@@ -843,7 +888,7 @@ func (e *Editor) updateObjectOrigins(page int, objects []GraphicObject, preserve
 		}
 	}
 	apply(e, after, afterOrigins)
-	if change := e.recordChange(); change != nil {
+	if change := e.recordChange(page); change != nil {
 		change.undo = func(e *Editor) { apply(e, before, beforeOrigins) }
 		change.redo = func(e *Editor) { apply(e, after, afterOrigins) }
 	}
@@ -891,30 +936,19 @@ func (e *Editor) selectedObjects(page int, ids []string) ([]GraphicObject, []edi
 	if len(ids) == 0 {
 		return objects, indexes, nil
 	}
-	selected := make(map[string]int, len(ids))
+	positions := e.objectPositions(content)
+	selected := make(map[string]bool, len(ids))
 	for i, id := range ids {
-		if _, exists := selected[id]; exists {
+		if selected[id] {
 			return nil, nil, fmt.Errorf("duplicate object %q", id)
 		}
-		selected[id] = i
-	}
-	for i, layer := range content.Content.Layer {
-		for j, object := range layer.Objects {
-			id := editorObjectID(object)
-			if index, ok := selected[id]; ok && id != "" {
-				objects[index] = object
-				indexes[index] = editorObjectPosition{i, j}
-				delete(selected, id)
-				if len(selected) == 0 {
-					return objects, indexes, nil
-				}
-			}
-		}
-	}
-	for _, id := range ids {
-		if _, missing := selected[id]; missing {
+		selected[id] = true
+		position, ok := positions[id]
+		if !ok {
 			return nil, nil, fmt.Errorf("object %q not found on page %d", id, page)
 		}
+		indexes[i] = position
+		objects[i] = content.Content.Layer[position.layer].Objects[position.index]
 	}
 	return objects, indexes, nil
 }
@@ -334,7 +334,9 @@ func (n *editorCompositeNode) setStates(states map[string]editorCompositeState)
 		}
 	}
 	visit(n.node)
-	n.object.TextObject.layout = n.states[editorObjectID(n.object)].layout
+	if state, ok := n.states[editorObjectID(n.object)]; ok {
+		n.object.TextObject.layout = state.layout
+	}
 }

 // setState 替换当前对象的会话记录并计入本次事务
@@ -418,6 +420,7 @@ func (e *Editor) compositeScope(page int, path ObjectPath) (*Reader, *Renderer,
 	if err != nil {
 		return nil, nil, nil, nil, err
 	}
+	root.node.parent = &editorXML{name: xml.Name{Local: "Layer"}, attrs: []xml.Attr{{Name: xml.Name{Local: "ID"}, Value: layer.ID}, {Name: xml.Name{Local: "DrawParam"}, Value: layer.DrawParam}}, parent: &editorXML{name: xml.Name{Local: "Content"}}}
 	root.setStates(object.CompositeGraphicUnit.states)
 	reader, err := e.reader(nil)
 	if err != nil {
@@ -848,6 +851,7 @@ func (e *Editor) editCompositeScope(page int, path ObjectPath, edit func(*Render
 	next.setStates(root.states)
 	next.object.CompositeGraphicUnit.states = next.states
 	origin := e.objectOrigin(path.ID)
+	next.node.parent = root.node.parent
 	updated := &editorObjectOrigin{data: data, node: next.node, object: next.object}
 	if origin != nil {
 		next.node.parent = origin.node.parent
@@ -16,12 +16,12 @@ package ofdgo

 import (
 	"bytes"
-
 	"encoding/xml"
 	"fmt"
-	basegeom "github.com/xiaoqidun/ofdgo/internal/base/geom"
 	"maps"
 	"slices"
+
+	basegeom "github.com/xiaoqidun/ofdgo/internal/base/geom"
 )

 // CompositeSelection 同一内部容器的独立选区快照，共享不可变字体和图片资源
@@ -36,6 +36,7 @@ type CompositeSelection struct {
 	containers []int
 	nodes      []*editorCompositeNode
 	source     *editorSourcePage
+	richText   map[int]*richTextSnapshot
 }

 // PasteCompositeSelection 将内部对象快照粘贴到页面顶层，保持嵌套结构、源继承外观和裁剪
@@ -73,9 +74,11 @@ func (e *Editor) CaptureCompositeObjects(page int, path ObjectPath, indexes []in
 	slices.Sort(indexes)
 	var owner *editorCompositeNode
 	var container *editorXML
-	selection := &CompositeSelection{editor: e, document: e.documentIdentity(), page: e.pages[page].ID, path: ObjectPath{ID: path.ID, Annotation: path.Annotation, Children: slices.Clone(path.Children)}}
+	selection := &CompositeSelection{richText: make(map[int]*richTextSnapshot), editor: e, document: e.documentIdentity(), page: e.pages[page].ID, path: ObjectPath{ID: path.ID, Annotation: path.Annotation, Children: slices.Clone(path.Children)}}
 	if path.Annotation == "" {
-		selection.source = e.objectOrigin(path.ID).page
+		if origin := e.objectOrigin(path.ID); origin != nil {
+			selection.source = origin.page
+		}
 	} else if e.source != nil {
 		selection.source = e.source.pages[e.pages[page].ID]
 	}
@@ -95,6 +98,13 @@ func (e *Editor) CaptureCompositeObjects(page int, path ObjectPath, indexes []in
 		copy := *node
 		copy.owner, copy.span = nil, nil
 		selection.nodes = append(selection.nodes, &copy)
+		snapshot, err := e.captureRichTextSnapshot(page, node.object)
+		if err != nil {
+			return nil, err
+		}
+		if snapshot != nil {
+			selection.richText[j] = snapshot
+		}
 	}
 	scope := root.loadedScope(path.Children)
 	for scope != owner {
@@ -134,62 +144,68 @@ func (e *Editor) PasteCompositeObjects(page int, path ObjectPath, selection *Com
 		return result, err
 	}
 	var result []int
-	err := e.editCompositeScope(page, path, func(renderer *Renderer, root *editorCompositeNode, _ []*editorCompositeNode) error {
-		scope := root.loadedScope(path.Children)
-		owner := scope
-		for i := 0; i < selection.references; i++ {
-			owner = owner.ref
-			if owner == nil {
-				return fmt.Errorf("composite resource container no longer exists")
+	err := e.Transaction(func(e *Editor) error {
+		err := e.editCompositeScope(page, path, func(renderer *Renderer, root *editorCompositeNode, _ []*editorCompositeNode) error {
+			scope := root.loadedScope(path.Children)
+			owner := scope
+			for i := 0; i < selection.references; i++ {
+				owner = owner.ref
+				if owner == nil {
+					return fmt.Errorf("composite resource container no longer exists")
+				}
 			}
-		}
-		container := owner.node
-		for _, index := range selection.containers {
-			containers := compositeContainers(container)
-			if index >= len(containers) {
-				return fmt.Errorf("composite page block no longer exists")
+			container := owner.node
+			for _, index := range selection.containers {
+				containers := compositeContainers(container)
+				if index >= len(containers) {
+					return fmt.Errorf("composite page block no longer exists")
+				}
+				container = containers[index]
 			}
-			container = containers[index]
-		}
-		box, _ := ParseBox(owner.object.CompositeGraphicUnit.Boundary)
-		parent := owner.parent.Multiply(TranslationMatrix(box.X, box.Y)).Multiply(NewMatrix(owner.object.CompositeGraphicUnit.CTM))
-		nodes := make([]*editorCompositeNode, len(selection.nodes))
-		for i, node := range selection.nodes {
-			copy := *node
-			copy.parent, copy.boundaryInCTM = parent, owner.boundaryInCTM
-			nodes[i] = &copy
-		}
-		data, states, err := e.copyCompositeNodes(renderer, nodes, dx, dy)
+			box, _ := ParseBox(owner.object.CompositeGraphicUnit.Boundary)
+			parent := owner.parent.Multiply(TranslationMatrix(box.X, box.Y)).Multiply(NewMatrix(owner.object.CompositeGraphicUnit.CTM))
+			nodes := make([]*editorCompositeNode, len(selection.nodes))
+			for i, node := range selection.nodes {
+				copy := *node
+				copy.parent, copy.boundaryInCTM = parent, owner.boundaryInCTM
+				nodes[i] = &copy
+			}
+			data, states, err := e.copyCompositeNodes(renderer, nodes, dx, dy)
+			if err != nil {
+				return err
+			}
+			maps.Copy(owner.states, states)
+			next, reached := 0, false
+			var count func(*editorCompositeNode)
+			count = func(node *editorCompositeNode) {
+				if node.ref != nil {
+					count(node.ref)
+				}
+				if reached {
+					return
+				}
+				for _, child := range node.children {
+					if node != owner || child.span.start < container.close {
+						next++
+					}
+				}
+				reached = node == owner
+			}
+			count(scope)
+			patch := editorXMLPatch{container.close, container.close, data}
+			if container.open == container.end {
+				patch = editorXMLContent(owner.data, container, data)
+			}
+			owner.patches = append(owner.patches, patch)
+			for i := range nodes {
+				result = append(result, next+i)
+			}
+			return nil
+		})
 		if err != nil {
 			return err
 		}
-		maps.Copy(owner.states, states)
-		next, reached := 0, false
-		var count func(*editorCompositeNode)
-		count = func(node *editorCompositeNode) {
-			if node.ref != nil {
-				count(node.ref)
-			}
-			if reached {
-				return
-			}
-			for _, child := range node.children {
-				if node != owner || child.span.start < container.close {
-					next++
-				}
-			}
-			reached = node == owner
-		}
-		count(scope)
-		patch := editorXMLPatch{container.close, container.close, data}
-		if container.open == container.end {
-			patch = editorXMLContent(owner.data, container, data)
-		}
-		owner.patches = append(owner.patches, patch)
-		for i := range nodes {
-			result = append(result, next+i)
-		}
-		return nil
+		return e.putCompositeRichTextCopies(page, path, result, selection.richText)
 	})
 	if err != nil {
 		return nil, err
@@ -226,7 +242,7 @@ func (e *Editor) pasteCompositeSelection(selection *CompositeSelection, paste fu
 	renderer := e.newRenderer(reader)
 	var objects []GraphicObject
 	var remaps []map[string]string
-	for _, source := range selection.nodes {
+	for i, source := range selection.nodes {
 		copy, err := newEditorCompositeNode(source.data)
 		if err != nil {
 			return err
@@ -322,13 +338,16 @@ func (e *Editor) pasteCompositeSelection(selection *CompositeSelection, paste fu
 			return err
 		}
 		object.state = copy.states[editorObjectID(copy.object)]
-		object.TextObject.layout = object.state.layout
+		if object.state.layout != nil {
+			object.TextObject.layout = object.state.layout
+		}
 		copy.object.TextObject.layout = object.TextObject.layout
 		if object.Type == "CompositeObject" || object.Type == "CompositeGraphicUnit" {
 			object.CompositeGraphicUnit.states = maps.Clone(copy.states)
 			copy.object.CompositeGraphicUnit.states = object.CompositeGraphicUnit.states
 		}
 		object.origin = &editorObjectOrigin{editor: e, document: e.documentIdentity(), page: selection.source, data: copy.data, node: copy.node, object: copy.object}
+		object.richText = selection.richText[i]
 		objects = append(objects, object)
 		remaps = append(remaps, copy.remaps...)
 	}
@@ -251,7 +251,9 @@ func (e *Editor) ungroupCompositeNode(renderer *Renderer, node *editorCompositeN
 			}
 			member.node.parent = &editorXML{name: xml.Name{Local: "Layer"}, parent: &editorXML{name: xml.Name{Local: "Content"}}}
 			member.object.state = states[editorObjectID(member.object)]
-			member.object.TextObject.layout = member.object.state.layout
+			if member.object.state.layout != nil {
+				member.object.TextObject.layout = member.object.state.layout
+			}
 			member.object.CompositeGraphicUnit.states = states
 			member.object.origin = &editorObjectOrigin{editor: e, document: e.documentIdentity(), data: member.data, node: member.node, object: member.object}
 			objects[i] = member.object
@@ -40,6 +40,29 @@ func (e *Editor) AddCompositeObject(page int, path ObjectPath, object GraphicObj
 // 入参: page 页面索引, path 父路径, objects 当前文档快照或基本对象, dx 页面横向位移, dy 页面纵向位移
 // 返回: []int 新成员序号, error 错误信息
 func (e *Editor) CopyObjectsToComposite(page int, path ObjectPath, objects []GraphicObject, dx, dy float64) ([]int, error) {
+	metadata, err := e.copiedRichTextMetadata(objects)
+	if err != nil {
+		return nil, err
+	}
+	if len(metadata) == 0 {
+		return e.copyObjectsToComposite(page, path, objects, dx, dy)
+	}
+	var indexes []int
+	err = e.Transaction(func(e *Editor) error {
+		var err error
+		indexes, err = e.copyObjectsToComposite(page, path, objects, dx, dy)
+		if err != nil {
+			return err
+		}
+		return e.putCompositeRichTextCopies(page, path, indexes, metadata)
+	})
+	return indexes, err
+}
+
+// copyObjectsToComposite 插入对象原文，由调用方同步富文本语义
+// 入参: page 页面索引, path 父路径, objects 对象快照, dx 横向位移, dy 纵向位移
+// 返回: []int 成员序号, error 校验或提交错误
+func (e *Editor) copyObjectsToComposite(page int, path ObjectPath, objects []GraphicObject, dx, dy float64) ([]int, error) {
 	if !finite(dx) || !finite(dy) {
 		return nil, fmt.Errorf("copy requires finite offsets")
 	}
@@ -49,6 +72,9 @@ func (e *Editor) CopyObjectsToComposite(page int, path ObjectPath, objects []Gra
 			return nil
 		}
 		owner := root.loadedScope(path.Children)
+		if owner.ref != nil {
+			owner = owner.ref
+		}
 		box, _ := ParseBox(owner.object.CompositeGraphicUnit.Boundary)
 		parent := owner.parent.Multiply(TranslationMatrix(box.X, box.Y)).Multiply(NewMatrix(owner.object.CompositeGraphicUnit.CTM))
 		inverse, ok := parent.Invert()
@@ -45,31 +45,47 @@ func (e *Editor) CopyCompositeObjects(page int, path ObjectPath, indexes []int,
 		return nil, fmt.Errorf("copy requires finite offsets")
 	}
 	var result []int
-	err := e.editCompositeObjects(page, path, indexes, func(renderer *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
-		container := nodes[0].span.parent
-		for i, node := range nodes {
-			if !members[i].Capabilities.Copy || node.span.parent != container {
-				return fmt.Errorf("copy requires editable members in the same container")
+	metadata := make(map[int]*richTextSnapshot)
+	err := e.Transaction(func(e *Editor) error {
+		err := e.editCompositeObjects(page, path, indexes, func(renderer *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
+			container := nodes[0].span.parent
+			for i, node := range nodes {
+				if !members[i].Capabilities.Copy || node.span.parent != container {
+					return fmt.Errorf("copy requires editable members in the same container")
+				}
 			}
-		}
-		slices.SortFunc(nodes, func(a, b *editorCompositeNode) int { return a.index - b.index })
-		data, states, err := e.copyCompositeNodes(renderer, nodes, dx, dy)
+			slices.SortFunc(nodes, func(a, b *editorCompositeNode) int { return a.index - b.index })
+			for i, node := range nodes {
+				snapshot, err := e.captureRichTextSnapshot(page, node.object)
+				if err != nil {
+					return err
+				}
+				if snapshot != nil {
+					metadata[i] = snapshot
+				}
+			}
+			data, states, err := e.copyCompositeNodes(renderer, nodes, dx, dy)
+			if err != nil {
+				return err
+			}
+			owner := nodes[0].owner
+			maps.Copy(owner.states, states)
+			owner.patches = append(owner.patches, editorXMLPatch{container.close, container.close, data})
+			next := 0
+			for _, member := range owner.children {
+				if container.start < member.span.start && member.span.end <= container.close {
+					next = member.index + 1
+				}
+			}
+			for i := range nodes {
+				result = append(result, next+i)
+			}
+			return nil
+		})
 		if err != nil {
 			return err
 		}
-		owner := nodes[0].owner
-		maps.Copy(owner.states, states)
-		owner.patches = append(owner.patches, editorXMLPatch{container.close, container.close, data})
-		next := 0
-		for _, member := range owner.children {
-			if container.start < member.span.start && member.span.end <= container.close {
-				next = member.index + 1
-			}
-		}
-		for i := range nodes {
-			result = append(result, next+i)
-		}
-		return nil
+		return e.putCompositeRichTextCopies(page, path, result, metadata)
 	})
 	if err != nil {
 		return nil, err
@@ -20,7 +20,7 @@ import (
 	"strconv"
 )

-// UpdateCompositeText 修改内部文字，原文保留定位，已知段落按会话选项重排
+// UpdateCompositeText 修改内部文字，原文保留定位，已知段落按排版选项重排
 // 空样式保留原字体、字号和颜色，显式改变字号时重新排版并保留首行基线
 // 方向和字形映射沿用RewriteText的定位校验，不改变原文中未修改的属性
 // 入参: page 页面索引, path 父复合路径, index 成员序号, value 文字, style 文字样式增量
@@ -29,7 +29,7 @@ func (e *Editor) UpdateCompositeText(page int, path ObjectPath, index int, value
 	return e.changeCompositeText(page, path, []int{index}, &value, style, nil, nil)
 }

-// StyleCompositeText 批量修改内部文字字体、字号或颜色，换字体保留原文字定位
+// StyleCompositeText 批量修改内部文字字体、字号或颜色，已知段落重排，原文保留定位
 // 更换字体时同步字形索引，无法逐字映射时需显式重排，缺字使整批操作失败
 // 入参: page 页面索引, path 父复合路径, indexes 成员序号, style 文字样式增量
 // 返回: error 错误信息
@@ -38,7 +38,7 @@ func (e *Editor) StyleCompositeText(page int, path ObjectPath, indexes []int, st
 }

 // LayoutCompositeText 显式重排内部普通文字，保留原始基线、变换、裁剪和绘制属性
-// 段落选项仅保留在编辑会话中，撤销重做随对象恢复，保存为标准TextCode定位
+// 段落选项随标准TextCode定位保存，撤销重做及重新打开时恢复
 // 入参: page 页面索引, path 父路径, index 成员序号, value 原文, options 段落选项
 // 返回: error 错误信息
 func (e *Editor) LayoutCompositeText(page int, path ObjectPath, index int, value string, options TextLayout) error {
@@ -80,6 +80,14 @@ func (e *Editor) updateCompositeText(node *editorCompositeNode, member Composite
 	object := cloneEditorData(node.object)
 	text := cloneEditorData(member.Object.TextObject)
 	state := node.states[editorObjectID(node.object)]
+	if state.layout == nil && text.layout != nil {
+		x, _, err := e.richPlainOffset(text)
+		if err != nil {
+			return err
+		}
+		y, _ := strconv.ParseFloat(text.TextCode[0].Y, 64)
+		state.layout, state.origin = text.layout, [2]float64{x, y}
+	}
 	content, layout := text.TextLayout()
 	original := content
 	if style.Font != "" {
@@ -121,7 +129,7 @@ func (e *Editor) updateCompositeText(node *editorCompositeNode, member Composite
 		}
 		object.TextObject.TextCode = text.TextCode
 		object.TextObject.CGTransform = text.CGTransform
-	} else if options != nil || content != original || style.Size != 0 && style.Size != text.Size || state.layout != nil && state.layout.options.Shape && style.Font != "" && style.Font != object.TextObject.Font {
+	} else if options != nil || content != original || style.Size != 0 && style.Size != text.Size || state.layout != nil && style.Font != "" && style.Font != object.TextObject.Font {
 		if style.Size != 0 {
 			text.Size = style.Size
 		}
@@ -140,7 +148,10 @@ func (e *Editor) updateCompositeText(node *editorCompositeNode, member Composite
 		}
 		object.TextObject.Size, object.TextObject.TextCode = text.Size, text.TextCode
 		object.TextObject.CGTransform = text.CGTransform
-		state.layout = &textLayout{value: content, options: layout}
+		if frame != nil {
+			text.layout.autoWidth = false
+		}
+		state.layout = text.layout
 	}
 	if style.Font != "" && style.Font != object.TextObject.Font {
 		if err := e.prepareText(&text); err != nil {
@@ -161,6 +172,7 @@ func (e *Editor) updateCompositeText(node *editorCompositeNode, member Composite
 		}
 		object.TextObject.FillColor = editorStyleColor(fill, member.Object.TextObject.FillColor)
 	}
+	object.TextObject.layout = state.layout
 	if err := node.update(object); err != nil {
 		return err
 	}
@@ -19,6 +19,7 @@ import (
 	"encoding/xml"
 	"fmt"
 	"reflect"
+	"slices"
 	"strconv"
 	"sync"
 )
@@ -241,6 +242,22 @@ func (e *Editor) copiedLayerStyle(object GraphicObject) string {
 // 入参: value 原值
 // 返回: T 独立副本
 func cloneEditorData[T any](value T) T {
+	switch source := any(value).(type) {
+	case GraphicObject:
+		return any(copyEditorGraphicObject(source)).(T)
+	case TextObject:
+		return any(copyEditorTextObject(source)).(T)
+	case PathObject:
+		return any(copyEditorPathObject(source)).(T)
+	case ImageObject:
+		return any(copyEditorImageObject(source)).(T)
+	case CompositeGraphicUnit:
+		return any(copyEditorCompositeGraphicUnit(source)).(T)
+	case PageContent:
+		return any(copyEditorPageContent(source)).(T)
+	case Layer:
+		return any(copyEditorLayer(source)).(T)
+	}
 	source := reflect.ValueOf(value)
 	if !source.IsValid() {
 		return value
@@ -336,3 +353,174 @@ func editorCloneFields(kind reflect.Type) []int {
 	actual, _ := editorClonePlans.LoadOrStore(kind, fields)
 	return actual.([]int)
 }
+
+// copyEditorGraphicObject 复制GraphicObject的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: GraphicObject 独立副本
+func copyEditorGraphicObject(value GraphicObject) GraphicObject {
+	value.TextObject = copyEditorTextObject(value.TextObject)
+	value.PathObject = copyEditorPathObject(value.PathObject)
+	value.ImageObject = copyEditorImageObject(value.ImageObject)
+	value.CompositeGraphicUnit = copyEditorCompositeGraphicUnit(value.CompositeGraphicUnit)
+	return value
+}
+
+// copyEditorTextObject 复制TextObject的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: TextObject 独立副本
+func copyEditorTextObject(value TextObject) TextObject {
+	if value.DashOffset != nil {
+		copied := *value.DashOffset
+		value.DashOffset = &copied
+	}
+	if value.Alpha != nil {
+		copied := *value.Alpha
+		value.Alpha = &copied
+	}
+	if value.Visible != nil {
+		copied := *value.Visible
+		value.Visible = &copied
+	}
+	if value.Fill != nil {
+		copied := *value.Fill
+		value.Fill = &copied
+	}
+	if value.Stroke != nil {
+		copied := *value.Stroke
+		value.Stroke = &copied
+	}
+	value.StrokeColor = cloneEditorData(value.StrokeColor)
+	value.FillColor = cloneEditorData(value.FillColor)
+	value.CGTransform = slices.Clone(value.CGTransform)
+	value.TextCode = slices.Clone(value.TextCode)
+	value.Clips = cloneEditorData(value.Clips)
+	value.Actions = cloneEditorData(value.Actions)
+	return value
+}
+
+// copyEditorPathObject 复制PathObject的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: PathObject 独立副本
+func copyEditorPathObject(value PathObject) PathObject {
+	if value.DashOffset != nil {
+		copied := *value.DashOffset
+		value.DashOffset = &copied
+	}
+	if value.Alpha != nil {
+		copied := *value.Alpha
+		value.Alpha = &copied
+	}
+	if value.Visible != nil {
+		copied := *value.Visible
+		value.Visible = &copied
+	}
+	if value.Stroke != nil {
+		copied := *value.Stroke
+		value.Stroke = &copied
+	}
+	if value.Fill != nil {
+		copied := *value.Fill
+		value.Fill = &copied
+	}
+	value.StrokeColor = cloneEditorData(value.StrokeColor)
+	value.FillColor = cloneEditorData(value.FillColor)
+	value.Clips = cloneEditorData(value.Clips)
+	value.Actions = cloneEditorData(value.Actions)
+	return value
+}
+
+// copyEditorImageObject 复制ImageObject的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: ImageObject 独立副本
+func copyEditorImageObject(value ImageObject) ImageObject {
+	if value.Alpha != nil {
+		copied := *value.Alpha
+		value.Alpha = &copied
+	}
+	if value.Visible != nil {
+		copied := *value.Visible
+		value.Visible = &copied
+	}
+	value.Border = cloneEditorData(value.Border)
+	value.Clips = cloneEditorData(value.Clips)
+	value.Actions = cloneEditorData(value.Actions)
+	return value
+}
+
+// copyEditorCompositeGraphicUnit 复制CompositeGraphicUnit的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: CompositeGraphicUnit 独立副本
+func copyEditorCompositeGraphicUnit(value CompositeGraphicUnit) CompositeGraphicUnit {
+	if value.Alpha != nil {
+		copied := *value.Alpha
+		value.Alpha = &copied
+	}
+	if value.Visible != nil {
+		copied := *value.Visible
+		value.Visible = &copied
+	}
+	value.Objects = slices.Clone(value.Objects)
+	for i := range value.Objects {
+		value.Objects[i] = copyEditorGraphicObject(value.Objects[i])
+	}
+	value.TextObject = slices.Clone(value.TextObject)
+	for i := range value.TextObject {
+		value.TextObject[i] = copyEditorTextObject(value.TextObject[i])
+	}
+	value.PathObject = slices.Clone(value.PathObject)
+	for i := range value.PathObject {
+		value.PathObject[i] = copyEditorPathObject(value.PathObject[i])
+	}
+	value.ImageObject = slices.Clone(value.ImageObject)
+	for i := range value.ImageObject {
+		value.ImageObject[i] = copyEditorImageObject(value.ImageObject[i])
+	}
+	value.CompositeGraphicUnit = slices.Clone(value.CompositeGraphicUnit)
+	for i := range value.CompositeGraphicUnit {
+		value.CompositeGraphicUnit[i] = copyEditorCompositeGraphicUnit(value.CompositeGraphicUnit[i])
+	}
+	value.Clips = cloneEditorData(value.Clips)
+	value.Actions = cloneEditorData(value.Actions)
+	return value
+}
+
+// copyEditorPageContent 复制PageContent的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: PageContent 独立副本
+func copyEditorPageContent(value PageContent) PageContent {
+	value.Template = slices.Clone(value.Template)
+	value.PageRes = slices.Clone(value.PageRes)
+	value.Content.Layer = slices.Clone(value.Content.Layer)
+	for i := range value.Content.Layer {
+		value.Content.Layer[i] = copyEditorLayer(value.Content.Layer[i])
+	}
+	value.Actions = cloneEditorData(value.Actions)
+	return value
+}
+
+// copyEditorLayer 复制Layer的可变字段，保留内部只读状态
+// 入参: value 原值
+// 返回: Layer 独立副本
+func copyEditorLayer(value Layer) Layer {
+	value.Objects = slices.Clone(value.Objects)
+	for i := range value.Objects {
+		value.Objects[i] = copyEditorGraphicObject(value.Objects[i])
+	}
+	value.TextObject = slices.Clone(value.TextObject)
+	for i := range value.TextObject {
+		value.TextObject[i] = copyEditorTextObject(value.TextObject[i])
+	}
+	value.PathObject = slices.Clone(value.PathObject)
+	for i := range value.PathObject {
+		value.PathObject[i] = copyEditorPathObject(value.PathObject[i])
+	}
+	value.ImageObject = slices.Clone(value.ImageObject)
+	for i := range value.ImageObject {
+		value.ImageObject[i] = copyEditorImageObject(value.ImageObject[i])
+	}
+	value.CompositeGraphicUnit = slices.Clone(value.CompositeGraphicUnit)
+	for i := range value.CompositeGraphicUnit {
+		value.CompositeGraphicUnit[i] = copyEditorCompositeGraphicUnit(value.CompositeGraphicUnit[i])
+	}
+	return value
+}
@@ -415,7 +415,7 @@ func (e *Editor) editDocumentSnapshot(ctx context.Context, reader *Reader, edit
 	return nil
 }

-// adoptDocumentReader 接入已加载的编辑入口，跨文档或版本时重建页面与资源状态
+// adoptDocumentReader 接入已加载的编辑入口，同文档重建自定义字段来源，跨文档或版本时重建页面与资源状态
 // 入参: ctx 取消上下文, reader 不拥有输入文件的独立阅读器
 // 返回: error 编辑器初始化错误
 func (e *Editor) adoptDocumentReader(ctx context.Context, reader *Reader) error {
@@ -441,6 +441,13 @@ func (e *Editor) adoptDocumentReader(ctx context.Context, reader *Reader) error
 				source.structureStarts[index] = starts
 			}
 		}
+		source.info.CustomDatas = cloneEditorData(reader.OFD.DocBody[reader.documentIndex].DocInfo.CustomDatas)
+		if source.info.CustomDatas != nil {
+			for i := range source.info.CustomDatas.CustomData {
+				source.info.CustomDatas.CustomData[i].sourceIndex = i + 1
+			}
+		}
+		e.Info.CustomDatas = cloneEditorData(source.info.CustomDatas)
 		e.source = &source
 	} else {
 		next, err := reader.EditorContext(ctx)
@@ -453,6 +460,7 @@ func (e *Editor) adoptDocumentReader(ctx context.Context, reader *Reader) error
 		next.encryption = e.encryption
 		next.saveTarget = e.saveTarget
 		next.backends, next.fontDirs, next.fontFS = e.backends, e.fontDirs, e.fontFS
+		next.SetResources(e.runtimeResources)
 		next.validatedPaths = e.validatedPaths
 		*e = *next
 	}
@@ -34,8 +34,9 @@ type editorFontUsage struct {
 	unsafe bool
 }

-// editorFontSubset 保存单个新增字体最近一次裁剪结果，不保留历史字形集合
+// editorFontSubset 保存单个新增字体及其快照最近一次裁剪结果，不保留历史字形集合
 type editorFontSubset struct {
+	source [32]byte
 	glyphs []uint16
 	data   []byte
 	mapped bool
@@ -291,6 +292,141 @@ func editorObjectFontScan(object GraphicObject) bool {
 // 入参: progress 保存进度回调
 // 返回: map[string][]byte 包内字体子集, error 错误信息
 func (e *Editor) subsetFonts(progress editorProgress) (map[string][]byte, error) {
+	result, err := e.subsetNewFonts(progress)
+	if err != nil {
+		return nil, err
+	}
+	ctx := context.Background()
+	if e.output != nil {
+		ctx = e.output.ctx
+	}
+	source, err := e.subsetSnapshotFonts(ctx, progress.withContext(ctx))
+	if err != nil {
+		return nil, err
+	}
+	if result == nil {
+		return source, nil
+	}
+	maps.Copy(result, source)
+	return result, nil
+}
+
+// subsetSnapshotFonts 在写出时扫描快照中新增字体的完整包引用，不改动既有字体
+// 入参: ctx 取消上下文, progress 写出进度
+// 返回: map[string][]byte 新增字体的安全子集, error 扫描或裁剪错误
+func (e *Editor) subsetSnapshotFonts(ctx context.Context, progress editorProgress) (map[string][]byte, error) {
+	if e.source == nil || e.backends.FontResources == nil {
+		return nil, ctx.Err()
+	}
+	candidates := make(map[string]int)
+	for i, resource := range e.resources {
+		if err := ctx.Err(); err != nil {
+			return nil, err
+		}
+		if resource.font != nil && resource.font.FontFile != "" && e.source.reader.fileNames[resource.name] {
+			candidates[resource.name] = i
+		}
+	}
+	if len(candidates) == 0 {
+		return nil, ctx.Err()
+	}
+	view, err := e.readerContext(ctx, progress)
+	if err != nil {
+		return nil, err
+	}
+	defer view.Close()
+	refs, resources, references, safe, err := scanEditorResources(ctx, view, view.files, nil, maps.Clone(view.fileNames), progress, true)
+	if err != nil || !safe {
+		return nil, err
+	}
+	scoped, err := resourceReferenceScopes(ctx, refs.documents, resources, references, "")
+	if err != nil || scoped == nil {
+		return nil, err
+	}
+	read := func(name string) ([]byte, error) { return view.readFileViewContext(ctx, name) }
+	usage, err := resourceFontUsage(ctx, resources, scoped, read)
+	if err != nil {
+		return nil, err
+	}
+	for _, source := range references {
+		for name := range source.files {
+			if font := usage[name]; font != nil && !source.versions[name] {
+				font.unsafe = true
+			}
+		}
+		for _, definition := range source.definitions {
+			for name := range definition.files {
+				if font := usage[name]; font != nil {
+					font.unsafe = true
+				}
+			}
+		}
+	}
+	result := make(map[string][]byte)
+	for i, name := range slices.Sorted(maps.Keys(candidates)) {
+		if err := progress.report("fonts", i, len(candidates)); err != nil {
+			return nil, err
+		}
+		font := usage[name]
+		if font == nil || font.unsafe || len(font.chars)+len(font.glyphs) == 0 {
+			continue
+		}
+		data, err := read(name)
+		if err != nil {
+			return nil, err
+		}
+		parsed, err := e.backends.FontResources.OpenFontResource(FontFile{Data: data}, 0)
+		if err != nil {
+			return nil, err
+		}
+		if !parsed.CanSubset {
+			continue
+		}
+		preserve := len(font.glyphs) != 0
+		glyphs := maps.Clone(font.glyphs)
+		for char := range font.chars {
+			if err := ctx.Err(); err != nil {
+				return nil, err
+			}
+			glyphs[parsed.GlyphIndex(char)] = true
+		}
+		glyphs[0] = true
+		for id := range glyphs {
+			if id >= parsed.NumGlyphs() {
+				font.unsafe = true
+				break
+			}
+		}
+		if font.unsafe {
+			continue
+		}
+		ids := slices.Sorted(maps.Keys(glyphs))
+		checksum := sha256.Sum256(data)
+		resource := &e.resources[candidates[name]]
+		if resource.subset == nil || resource.subset.source != checksum || resource.subset.mapped != preserve || !slices.Equal(resource.subset.glyphs, ids) {
+			subset, err := e.backends.FontResources.SubsetFont(data, ids, preserve)
+			if err != nil {
+				return nil, err
+			}
+			if err := ctx.Err(); err != nil {
+				return nil, err
+			}
+			if len(subset) >= len(data) {
+				subset = nil
+			}
+			resource.subset = &editorFontSubset{source: checksum, glyphs: ids, data: subset, mapped: preserve}
+		}
+		if len(resource.subset.data) != 0 {
+			result[name] = resource.subset.data
+		}
+	}
+	return result, progress.report("fonts", len(candidates), len(candidates))
+}
+
+// subsetNewFonts 解析尚未物化为源资源的新增字体，保持编辑字体完整
+// 入参: progress 写出进度
+// 返回: map[string][]byte 包内字体子集, error 读取或裁剪错误
+func (e *Editor) subsetNewFonts(progress editorProgress) (map[string][]byte, error) {
 	ctx := context.Background()
 	if e.output != nil {
 		ctx = e.output.ctx
@@ -303,7 +439,7 @@ func (e *Editor) subsetFonts(progress editorProgress) (map[string][]byte, error)
 		return nil, err
 	}
 	if !slices.ContainsFunc(e.resources, func(resource editorResource) bool {
-		return resource.font != nil && resource.font.FontFile != ""
+		return resource.font != nil && resource.font.FontFile != "" && (e.source == nil || !e.source.reader.fileNames[resource.name])
 	}) {
 		return nil, nil
 	}
@@ -318,7 +454,7 @@ func (e *Editor) subsetFonts(progress editorProgress) (map[string][]byte, error)
 		if err := progress.report("fonts", i, total); err != nil {
 			return nil, err
 		}
-		if resource.font.FontFile == "" {
+		if resource.font.FontFile == "" || e.source != nil && e.source.reader.fileNames[resource.name] {
 			continue
 		}
 		resourceFont := e.fonts[resource.font.ID]
@@ -467,7 +603,7 @@ func (e *Editor) subsetFonts(progress editorProgress) (map[string][]byte, error)
 			return nil, err
 		}
 		resource := &e.resources[i]
-		if resource.font == nil {
+		if resource.font == nil || e.source != nil && e.source.reader.fileNames[resource.name] {
 			continue
 		}
 		usage := used[resource.font.ID]
@@ -907,6 +907,7 @@ func (e *Editor) restoreResourceSnapshot(state Editor) {
 		state.clearFontResourceCache()
 	}
 	state.backends, state.fontDirs, state.fontFS = e.backends, e.fontDirs, e.fontFS
+	state.SetResources(e.runtimeResources)
 	state.encryption, state.output, state.OnWriteProgress = e.encryption, e.output, e.OnWriteProgress
 	state.saveTarget = e.saveTarget
 	state.fontRenderer, state.fontSourcesCache = nil, nil
@@ -962,12 +963,12 @@ func pruneUnreferencedFiles(ctx context.Context, reader *Reader, candidates ...s
 			if root == "" {
 				root = node.Name.Local
 			}
-			if classifyOFDNamespace(node.Name.Space) == ofdXMLUnknown || slices.Contains([]string{"CustomTags", "Extensions", "ExtendData", "Data"}, node.Name.Local) {
+			if classifyOFDNamespace(node.Name.Space) == ofdXMLUnknown || root == "CustomTags" || slices.Contains([]string{"Extensions", "ExtendData", "Data"}, node.Name.Local) {
 				uncertain = true
 				return fmt.Errorf("unknown file dependencies in %s", name)
 			}
 			for _, attr := range node.Attr {
-				if attr.Name.Space != "" && attr.Name.Space != "xmlns" && attr.Name.Space != XMLNamespace {
+				if attr.Name.Space != "" && attr.Name.Space != "xmlns" && attr.Name.Space != XMLNamespace && !textMetadataAttribute(node.Name, attr) {
 					uncertain = true
 					return fmt.Errorf("unknown file dependencies in %s", name)
 				}
@@ -989,7 +990,19 @@ func pruneUnreferencedFiles(ctx context.Context, reader *Reader, candidates ...s
 				versions[name] = append(versions[name], versionEditLink{node: node, target: target})
 			}
 		}
-		if err := reader.scanDocumentFileReferences(ctx, name, true, add, record, inspect); err != nil {
+		err := reader.scanDocumentFileReferences(ctx, name, true, add, record, inspect)
+		if uncertain && (root == "CustomTags" || root == "RichText") {
+			data, readErr := reader.readFileViewContext(ctx, name)
+			if readErr != nil {
+				return readErr
+			}
+			refs := &editorResourceRefs{ids: make(map[string]bool), files: make(map[string]bool), fonts: make(map[string]*editorFontUsage)}
+			if _, safe := refs.scanContext(ctx, bytes.NewReader(data), name); safe {
+				uncertain = false
+				err = reader.scanDocumentFileReferences(ctx, name, true, add, record, nil)
+			}
+		}
+		if err != nil {
 			var syntax *xml.SyntaxError
 			if uncertain || errors.As(err, &syntax) {
 				return ctx.Err()
@@ -143,7 +143,7 @@ func scanEditorFontFilesMode(ctx context.Context, reader *Reader, index int, ins
 				return nil
 			}
 			for _, attr := range node.attrs {
-				if attr.Name.Space != "" && attr.Name.Space != "xmlns" && attr.Name.Space != XMLNamespace {
+				if attr.Name.Space != "" && attr.Name.Space != "xmlns" && attr.Name.Space != XMLNamespace && !textMetadataAttribute(node.name, attr) {
 					scan.unsafe = true
 				}
 			}
@@ -93,7 +93,10 @@ func (e *Editor) GroupObjects(page int, ids []string) (id string, err error) {
 		state := object.state
 		if object.Type == "TextObject" && object.TextObject.layout != nil {
 			state.layout = object.TextObject.layout
-			state.origin[0], _ = strconv.ParseFloat(object.TextObject.TextCode[0].X, 64)
+			state.origin[0], _, err = e.richPlainOffset(object.TextObject)
+			if err != nil {
+				return "", err
+			}
 			state.origin[1], _ = strconv.ParseFloat(object.TextObject.TextCode[0].Y, 64)
 		}
 		states[editorObjectID(object)] = state
@@ -253,7 +256,7 @@ func (e *Editor) replaceGroup(page int, indexes []editorObjectPosition, objects
 		}
 	}
 	apply(e, after, origins)
-	if change := e.recordChange(); change != nil {
+	if change := e.recordChange(page); change != nil {
 		change.undo = func(e *Editor) { apply(e, before, previous) }
 		change.redo = func(e *Editor) { apply(e, after, origins) }
 	}
@@ -21,10 +21,43 @@ import (

 // editorChange 页面或对象操作及其修订标识
 type editorChange struct {
-	undo   func(*Editor)
-	redo   func(*Editor)
-	before uint64
-	after  uint64
+	undo    func(*Editor)
+	redo    func(*Editor)
+	before  uint64
+	after   uint64
+	changes EditorChanges
+}
+
+// EditorChanges 描述最近一次修改或历史回放的刷新范围
+// All表示文档结构或共享资源变化；否则Pages为受影响的零基页码
+// 返回值只覆盖最近一次操作，调用方应在每次操作后读取
+type EditorChanges struct {
+	All   bool  `json:"all"`
+	Pages []int `json:"pages,omitempty"`
+}
+
+// Changes 获取最近一次有效修改的独立刷新范围
+// 返回: EditorChanges 变化范围；未发生修改时为空
+func (e *Editor) Changes() EditorChanges {
+	return EditorChanges{All: e.changes.All, Pages: slices.Clone(e.changes.Pages)}
+}
+
+// merge 合并同一事务中的变化范围
+// 入参: change 待合并的变化
+func (c *EditorChanges) merge(change EditorChanges) {
+	if c.All {
+		return
+	}
+	if change.All {
+		c.All = true
+		c.Pages = nil
+		return
+	}
+	for _, page := range change.Pages {
+		if !slices.Contains(c.Pages, page) {
+			c.Pages = append(c.Pages, page)
+		}
+	}
 }

 // Transaction 将多项修改作为一次原子操作提交，失败时保留原文档及历史
@@ -37,6 +70,8 @@ func (e *Editor) Transaction(edit func(*Editor) error) error {
 	before.Info = cloneEditorData(e.Info)
 	next := e.transactionSnapshot()
 	next.history, next.historyIndex, next.historyLimit = nil, 0, 0
+	pending := &EditorChanges{}
+	next.transactionChanges = pending
 	*e = next
 	committed := false
 	defer func() {
@@ -48,11 +83,17 @@ func (e *Editor) Transaction(edit func(*Editor) error) error {
 		return err
 	}
 	changed := e.revision != before.revision
+	changes := *pending
+	if e.transactionChanges != pending {
+		changes = EditorChanges{All: true}
+	}
+	e.transactionChanges = before.transactionChanges
 	e.history, e.historyIndex, e.historyLimit = before.history, before.historyIndex, before.historyLimit
 	if !sameBackend(e.backends.FontResources, before.backends.FontResources) {
 		e.clearFontResourceCache()
 	}
 	e.backends, e.fontDirs, e.fontFS = before.backends, before.fontDirs, before.fontFS
+	e.SetResources(before.runtimeResources)
 	e.fontSourcesCache = before.fontSourcesCache
 	if e.sameResourceView(&before) {
 		e.fontRenderer, e.fontMetrics = before.fontRenderer, before.fontMetrics
@@ -61,7 +102,7 @@ func (e *Editor) Transaction(edit func(*Editor) error) error {
 	}
 	if changed {
 		e.serial, e.revision = before.serial, before.revision
-		e.recordTransaction(before)
+		e.recordTransaction(before, changes)
 	}
 	committed = true
 	return nil
@@ -107,6 +148,7 @@ func (e *Editor) Undo() bool {
 	e.historyIndex--
 	change := e.history[e.historyIndex]
 	change.undo(e)
+	e.changes, e.objectIndex = change.changes, nil
 	e.revision = change.before
 	return true
 }
@@ -119,6 +161,7 @@ func (e *Editor) Redo() bool {
 	}
 	change := e.history[e.historyIndex]
 	change.redo(e)
+	e.changes, e.objectIndex = change.changes, nil
 	e.historyIndex++
 	e.revision = change.after
 	return true
@@ -131,15 +174,12 @@ func (e *Editor) Revision() uint64 {
 	return e.revision
 }

-// transactionSnapshot 复制可变容器，保留只读XML、图元及二进制资源的共享
+// transactionSnapshot 复制顶层容器，共享按替换方式更新的页面图层、图元和二进制资源
 // 返回: Editor 独立事务状态
 func (e *Editor) transactionSnapshot() Editor {
 	next := *e
 	next.Info = cloneEditorData(e.Info)
-	next.pages = make([]PageContent, len(e.pages))
-	for i, page := range e.pages {
-		next.pages[i] = copyEditorPage(page)
-	}
+	next.pages = slices.Clone(e.pages)
 	next.resources = slices.Clone(e.resources)
 	next.fonts, next.images, next.resourceID = maps.Clone(e.fonts), maps.Clone(e.images), maps.Clone(e.resourceID)
 	next.origins = maps.Clone(e.origins)
@@ -168,6 +208,7 @@ func (e *Editor) restoreTransaction(state Editor) {
 		state.clearFontResourceCache()
 	}
 	state.backends, state.fontDirs, state.fontFS = e.backends, e.fontDirs, e.fontFS
+	state.SetResources(e.runtimeResources)
 	state.fontSourcesCache = e.fontSourcesCache
 	state.validatedPaths = e.validatedPaths
 	state.encryption, state.output, state.OnWriteProgress = e.encryption, e.output, e.OnWriteProgress
@@ -211,9 +252,13 @@ func (e *Editor) retainDocumentResources(source *Editor) {
 }

 // recordTransaction 记录事务快照，在各自资源视图中保留后续注册的资源
-// 入参: before 修改前的文档状态
-func (e *Editor) recordTransaction(before Editor) {
-	if change := e.recordChange(); change != nil {
+// 入参: before 修改前的文档状态, changes 可选的事务变化范围
+func (e *Editor) recordTransaction(before Editor, changes ...EditorChanges) {
+	scope := EditorChanges{All: true}
+	if len(changes) != 0 {
+		scope = changes[0]
+	}
+	if change := e.recordChangeScope(scope); change != nil {
 		after := e.transactionSnapshot()
 		before.history, after.history = nil, nil
 		change.undo = func(e *Editor) {
@@ -228,10 +273,23 @@ func (e *Editor) recordTransaction(before Editor) {
 }

 // recordChange 分配修订标识并为已完成的有效修改预留记录
+// 入参: pages 受影响页码，省略表示全局变化
 // 返回: *editorChange 记录，未启用历史时为nil
-func (e *Editor) recordChange() *editorChange {
+func (e *Editor) recordChange(pages ...int) *editorChange {
+	return e.recordChangeScope(EditorChanges{All: len(pages) == 0, Pages: slices.Clone(pages)})
+}
+
+// recordChangeScope 分配修订并记录变更范围，事务中同步合并
+// 入参: scope 变更范围
+// 返回: *editorChange 可补充回放操作的记录
+func (e *Editor) recordChangeScope(scope EditorChanges) *editorChange {
+	e.objectIndex = nil
+	e.changes = scope
+	if e.transactionChanges != nil {
+		e.transactionChanges.merge(scope)
+	}
 	e.serial++
-	change := editorChange{before: e.revision, after: e.serial}
+	change := editorChange{before: e.revision, after: e.serial, changes: scope}
 	e.revision = e.serial
 	if e.historyLimit == 0 {
 		return nil
@@ -112,63 +112,107 @@ func (e *Editor) ImportObjects(source *Editor, sourcePage int, ids []string, pag
 // 入参: ctx 取消上下文, source 来源编辑器, sourcePage 来源页, ids 对象标识, page 目标页, options 迁移选项
 // 返回: []string 新对象标识, error 校验、迁移或取消错误
 func (e *Editor) ImportObjectsContext(ctx context.Context, source *Editor, sourcePage int, ids []string, page int, options ObjectImportOptions) ([]string, error) {
+	objects, _, err := e.importSelection(ctx, source, sourcePage, ids, nil, page, options, true)
+	return objects, err
+}
+
+// ImportSelection 导入独立单页选区包，重映射对象和资源标识，一次撤销恢复全部
+// 入参: ctx 取消上下文, source 单页选区阅读器, page 目标页, options 位移及导入配置
+// 返回: []string 正文标识, []string 注解标识, error 校验或迁移错误
+func (e *Editor) ImportSelection(ctx context.Context, source *Reader, page int, options ObjectImportOptions) ([]string, []string, error) {
+	doc, err := source.DocContext(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+	if len(doc.Pages.Page) != 1 {
+		return nil, nil, fmt.Errorf("selection requires exactly one page")
+	}
+	origin, err := source.EditorContext(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+	content, err := origin.page(0)
+	if err != nil {
+		return nil, nil, err
+	}
+	var objects, annotations []string
+	for _, layer := range content.Content.Layer {
+		for _, object := range layer.Objects {
+			objects = append(objects, editorObjectID(object))
+		}
+	}
+	notes, err := origin.Annotations(0)
+	if err != nil {
+		return nil, nil, err
+	}
+	for _, note := range notes {
+		annotations = append(annotations, note.ID)
+	}
+	return e.importSelection(ctx, origin, 0, objects, annotations, page, options, true)
+}
+
+// importSelection 迁移正文与注解，共用资源映射并保持来源绘制顺序
+// 入参: ctx 取消上下文, source 来源编辑器, sourcePage 来源页, ids 正文标识, annotations 注解标识, page 目标页, options 导入配置, strictLinks 拒绝跨页链接
+// 返回: []string 正文标识, []string 注解标识, error 迁移或提交错误
+func (e *Editor) importSelection(ctx context.Context, source *Editor, sourcePage int, ids, annotations []string, page int, options ObjectImportOptions, strictLinks bool) ([]string, []string, error) {
 	progress := editorProgress(options.OnProgress).withContext(ctx)
 	if err := ctx.Err(); err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	if !finite(options.DX) || !finite(options.DY) {
-		return nil, fmt.Errorf("import requires finite offsets")
+		return nil, nil, fmt.Errorf("import requires finite offsets")
 	}
 	if source.encryption != nil && e.encryption == nil && !options.AllowDecrypted {
-		return nil, ErrEncryptionPolicyRequired
+		return nil, nil, ErrEncryptionPolicyRequired
 	}
 	objects, err := source.Objects(sourcePage, ids)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	target, err := e.page(page)
-	if err != nil || len(objects) == 0 {
-		return nil, err
+	if err != nil || len(objects) == 0 && len(annotations) == 0 {
+		return nil, nil, err
 	}
 	if source == e {
 		if err := progress.report("commit", 0, 0); err != nil {
-			return nil, err
+			return nil, nil, err
 		}
-		return e.CopyObjectsContext(ctx, page, objects, options.DX, options.DY)
+		copied, err := e.CopyObjectsContext(ctx, page, objects, options.DX, options.DY)
+		return copied, nil, err
 	}
 	reader, err := source.readerContext(ctx, progress)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	defer reader.Close()
 	doc, err := reader.Doc()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	ref := doc.Pages.Page[sourcePage]
 	base, migration, err := e.prepareImport(ctx, reader, doc, map[string]bool{ref.ID: true}, false, progress)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	migration.ids[editorImportKey(ref.ID)], migration.strictLinks = target.ID, true
+	migration.ids[editorImportKey(ref.ID)], migration.strictLinks = target.ID, strictLinks
 	pageName := reader.ResPath(ref.BaseLoc)
 	content, err := reader.PageContentByIndex(sourcePage)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	for _, value := range content.PageRes {
 		name, err := migration.resolve(pageName, "", value)
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 		if err := migration.resourceIndex(name); err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 	}
 	layers := make([][]byte, len(objects))
 	for i, object := range objects {
 		if err := progress.report("objects", i, len(objects)); err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 		var data []byte
 		var attrs ofdAttrs
@@ -187,32 +231,48 @@ func (e *Editor) ImportObjectsContext(ctx context.Context, source *Editor, sourc
 			data, err = editorObjectXML(object)
 		}
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 		data, err = editorXMLContainer("Layer", attrs, data)
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 		root, err := parseEditorXMLContext(ctx, data)
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 		layers[i], err = migration.encode(editorImportEntry{name: pageName, data: data}, root)
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 	}
+	notes := &AnnotationSelection{editor: e, document: e.documentIdentity()}
+	for _, id := range annotations {
+		data, err := source.annotationXML(sourcePage, id)
+		if err != nil {
+			return nil, nil, err
+		}
+		root, err := parseEditorXMLContext(ctx, data)
+		if err != nil {
+			return nil, nil, err
+		}
+		data, err = migration.encode(editorImportEntry{name: pageName, data: data}, root)
+		if err != nil {
+			return nil, nil, err
+		}
+		notes.data = append(notes.data, data)
+	}
 	if err := migration.encodeResources(); err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	for _, resource := range e.resources {
 		delete(migration.files, resource.name)
 	}
 	next, err := migration.merge(base, nil, nil, nil)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	var copied []string
+	var copied, copiedNotes []string
 	err = e.Transaction(func(editor *Editor) error {
 		if err := progress.report("commit", 0, 0); err != nil {
 			return err
@@ -236,13 +296,13 @@ func (e *Editor) ImportObjectsContext(ctx context.Context, source *Editor, sourc
 				return err
 			}
 			object := layer.Objects[0]
+			object.TextObject.layout = objects[i].TextObject.layout
+			object.state = objects[i].state
+			object.CompositeGraphicUnit.states = remapCompositeStates(objects[i].CompositeGraphicUnit.states, migration.ids)
 			imported[i], err = editor.copiedObjectStyle(object, layer.DrawParam)
 			if err != nil {
 				return err
 			}
-			imported[i].TextObject.layout = objects[i].TextObject.layout
-			imported[i].state = objects[i].state
-			imported[i].CompositeGraphicUnit.states = remapCompositeStates(objects[i].CompositeGraphicUnit.states, migration.ids)
 			imported[i].origin = &editorObjectOrigin{editor: editor, document: editor.documentIdentity(), data: data, node: root.child("Layer").children[0], object: object}
 		}
 		copied, err = editor.CopyObjectsContext(ctx, page, imported, options.DX, options.DY)
@@ -253,12 +313,17 @@ func (e *Editor) ImportObjectsContext(ctx context.Context, source *Editor, sourc
 		for i, object := range objects {
 			orderedIDs[i] = editorObjectID(object)
 		}
-		return editor.copyRichTextMetadata(source, sourcePage, orderedIDs, page, copied)
+		notes.document = editor.documentIdentity()
+		copiedNotes, err = editor.PasteAnnotations(page, notes, options.DX, options.DY)
+		if err != nil {
+			return err
+		}
+		return editor.copyRichTextMetadata(ctx, source, sourcePage, orderedIDs, annotations, page, copied, copiedNotes)
 	})
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	return copied, err
+	return copied, copiedNotes, err
 }

 // ImportPages 将来源当前文档中的指定页面插入目标位置，保持输入顺序并作为一次撤销操作
@@ -45,6 +45,7 @@ func editorUpdateInfoXML(data []byte, docID string, index int, before, after Doc
 		{"DocID", before.DocID, after.DocID}, {"Title", before.Title, after.Title}, {"Author", before.Author, after.Author},
 		{"Subject", before.Subject, after.Subject}, {"Abstract", before.Abstract, after.Abstract},
 		{"CreationDate", before.CreationDate, after.CreationDate}, {"ModDate", before.ModDate, after.ModDate},
+		{"DocUsage", before.DocUsage, after.DocUsage}, {"Cover", before.Cover, after.Cover},
 		{"Creator", before.Creator, after.Creator}, {"CreatorVersion", before.CreatorVersion, after.CreatorVersion},
 	} {
 		if field[1] != field[2] {
@@ -138,17 +139,6 @@ func editorKeywords(data []byte, info *editorXML, values []string) ([]byte, erro
 	return editorPatchXML(data, patches), nil
 }

-// editorCreatorXML 更新指定文档的制作软件，移除原软件版本，保留其余根索引内容
-// 入参: data 当前根索引XML, docID 缺少文档描述时使用的标识, index 文档索引
-// 返回: []byte 修改后的XML, error 解析错误
-func editorCreatorXML(data []byte, docID string, index int) ([]byte, error) {
-	data, info, err := editorDocInfoXML(data, docID, index)
-	if err != nil {
-		return nil, err
-	}
-	return editorXMLSetText(data, info, [][2]string{{"Creator", ofdCreator}, {"CreatorVersion", ""}})
-}
-
 // editorDocInfoXML 获取文档描述，修改缺少描述的源文件时补建标准容器及标识
 // 入参: data 根索引XML, docID 缺少文档描述时使用的标识, index 文档索引
 // 返回: []byte 根索引XML, *editorXML 描述节点, error 解析错误
@@ -76,7 +76,7 @@ func editorXMLGenerated(data []byte, namespace string) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
-	prefix := editorXMLNamespacePrefix(root)
+	prefix := editorXMLNamespacePrefix(root, "ofd")
 	var patches []editorXMLPatch
 	var visit func(*editorXML, bool) error
 	visit = func(node *editorXML, declare bool) error {
@@ -152,9 +152,9 @@ func editorXMLGenerated(data []byte, namespace string) ([]byte, error) {
 }

 // editorXMLNamespacePrefix 选择未被当前作用域及子树占用的命名空间前缀
-// 入参: node 节点
+// 入参: node 节点, base 首选前缀
 // 返回: string 可用前缀
-func editorXMLNamespacePrefix(node *editorXML) string {
+func editorXMLNamespacePrefix(node *editorXML, base string) string {
 	used := make(map[string]bool)
 	collect := func(current *editorXML) {
 		for _, attr := range current.attrs {
@@ -174,9 +174,9 @@ func editorXMLNamespacePrefix(node *editorXML) string {
 		}
 	}
 	visit(node)
-	prefix := "ofd"
+	prefix := base
 	for index := 1; used[prefix]; index++ {
-		prefix = "ofd" + strconv.Itoa(index)
+		prefix = base + strconv.Itoa(index)
 	}
 	return prefix
 }
@@ -131,6 +131,9 @@ func (r *Reader) Editor() (*Editor, error) {
 // 入参: ctx 取消上下文
 // 返回: *Editor 编辑器, error 初始化或取消错误
 func (r *Reader) EditorContext(ctx context.Context) (*Editor, error) {
+	if r.pageReady != nil {
+		return nil, ErrIncompleteDocument
+	}
 	_, err := r.DocContext(ctx)
 	if err != nil {
 		return nil, err
@@ -151,6 +154,7 @@ func (r *Reader) EditorContext(ctx context.Context) (*Editor, error) {
 		}
 	}
 	e := NewEditor()
+	e.runtimeResources = r.resources
 	e.encryption = r.encryption
 	directory := cleanPackagePath(reader.RootDir)
 	e.source = &editorSource{reader: reader, document: doc, info: cloneEditorData(*info), fallbackDocID: e.Info.DocID, directory: directory, pages: make(map[string]*editorSourcePage, len(doc.Pages.Page)), origins: make(map[string]*editorObjectOrigin)}
@@ -393,15 +397,18 @@ func (e *Editor) sourceRGB() bool {
 }

 // repairSourceObjectIDs 按实际节点区分重复对象，只修复没有引用歧义的编号
-// 入参: data 页面原文, root 页面节点
+// 入参: ctx 取消上下文, data 页面原文, root 页面节点
 // 返回: []byte 编辑副本, bool 是否修复, error 错误信息
-func (e *Editor) repairSourceObjectIDs(data []byte, root *editorXML) ([]byte, bool, error) {
+func (e *Editor) repairSourceObjectIDs(ctx context.Context, data []byte, root *editorXML) ([]byte, bool, error) {
 	seen := make(map[string]bool)
 	duplicates := make(map[string]bool)
 	var nodes []*editorXML
 	var visit func(*editorXML) error
 	visit = func(parent *editorXML) error {
 		for _, node := range parent.children {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
 			if !ofdXMLChild(parent.name, node.name) {
 				continue
 			}
@@ -436,15 +443,18 @@ func (e *Editor) repairSourceObjectIDs(data []byte, root *editorXML) ([]byte, bo
 	if len(nodes) == 0 {
 		return data, false, nil
 	}
-	if err := e.checkDuplicateObjectReferences(duplicates); err != nil {
+	if err := e.checkDuplicateObjectReferences(ctx, duplicates); err != nil {
 		return nil, false, err
 	}
-	if err := e.prepareSourceIDs(); err != nil {
+	if err := e.prepareSourceIDsContext(ctx); err != nil {
 		return nil, false, err
 	}
 	maximum := e.maxID
 	var patches []editorXMLPatch
 	for _, node := range nodes {
+		if err := ctx.Err(); err != nil {
+			return nil, false, err
+		}
 		maximum++
 		encoded, err := editorXMLAttribute(data, node, "ID", strconv.Itoa(maximum))
 		if err != nil {
@@ -457,9 +467,9 @@ func (e *Editor) repairSourceObjectIDs(data []byte, root *editorXML) ([]byte, bo
 }

 // checkDuplicateObjectReferences 检查编号引用的目标歧义
-// 入参: duplicates 重复编号
+// 入参: ctx 取消上下文, duplicates 重复编号
 // 返回: error 引用歧义或读取错误
-func (e *Editor) checkDuplicateObjectReferences(duplicates map[string]bool) error {
+func (e *Editor) checkDuplicateObjectReferences(ctx context.Context, duplicates map[string]bool) error {
 	reader := e.source.reader
 	for name := range reader.fileNames {
 		if !strings.EqualFold(path.Ext(name), ".xml") {
@@ -471,6 +481,10 @@ func (e *Editor) checkDuplicateObjectReferences(duplicates map[string]bool) erro
 		}
 		decoder := xml.NewDecoder(input)
 		for {
+			if err := ctx.Err(); err != nil {
+				input.Close()
+				return err
+			}
 			token, readErr := decoder.Token()
 			if readErr != nil {
 				input.Close()
@@ -496,6 +510,16 @@ func (e *Editor) checkDuplicateObjectReferences(duplicates map[string]bool) erro
 // 入参: index 页面索引
 // 返回: error 错误信息
 func (e *Editor) loadSourcePage(index int) error {
+	return e.loadSourcePageContext(context.Background(), index)
+}
+
+// loadSourcePageContext 解析原始页面，取消时不提交未完成页面
+// 入参: ctx 取消上下文, index 页面索引
+// 返回: error 读取、解析或取消错误
+func (e *Editor) loadSourcePageContext(ctx context.Context, index int) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
 	source := e.source.pages[e.pages[index].ID]
 	if source == nil || source.original != nil {
 		return nil
@@ -503,24 +527,24 @@ func (e *Editor) loadSourcePage(index int) error {
 	loaded := *source
 	source = &loaded
 	reader := e.source.reader
-	data, err := reader.readFile(reader.ResPath(source.ref.BaseLoc))
+	data, err := reader.readFileViewContext(ctx, reader.ResPath(source.ref.BaseLoc))
 	if err != nil {
 		return err
 	}
-	root, err := parseEditorXML(data)
+	root, err := parseEditorXMLContext(ctx, data)
 	if err != nil {
 		return err
 	}
-	page, err := reader.PageContent(source.ref)
+	page, err := reader.PageContentContext(ctx, source.ref)
 	if err != nil {
 		return err
 	}
-	data, repaired, err := e.repairSourceObjectIDs(data, root)
+	data, repaired, err := e.repairSourceObjectIDs(ctx, data, root)
 	if err != nil {
 		return err
 	}
 	if repaired {
-		root, err = parseEditorXML(data)
+		root, err = parseEditorXMLContext(ctx, data)
 		if err != nil {
 			return err
 		}
@@ -543,13 +567,17 @@ func (e *Editor) loadSourcePage(index int) error {
 	}
 	source.data, source.root, source.nodes = data, root, nodes
 	source.repaired = repaired
+	origins := make(map[string]*editorObjectOrigin)
 	for i := range page.Content.Layer {
 		layer := &page.Content.Layer[i]
 		for j, object := range layer.Objects {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
 			id := editorObjectID(object)
 			if node := nodes[id]; node != nil {
 				origin := &editorObjectOrigin{page: source, data: data, node: node, object: object}
-				e.source.origins[id] = origin
+				origins[id] = origin
 				if editorXMLTransformable(node) {
 					resolved, err := e.resolveEditorStyle(object, layer.DrawParam)
 					if err != nil {
@@ -561,6 +589,10 @@ func (e *Editor) loadSourcePage(index int) error {
 			}
 		}
 	}
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	maps.Copy(e.source.origins, origins)
 	source.original = page
 	e.source.pages[source.ref.ID] = source
 	e.pages[index] = copyEditorPage(*page)
@@ -679,6 +711,7 @@ func editorPreservedObject(before, after GraphicObject) bool {
 	}
 	before = cloneEditorData(before)
 	before.state = after.state
+	before.richText = after.richText
 	switch before.Type {
 	case "TextObject":
 		a, b := &before.TextObject, after.TextObject
@@ -688,7 +688,7 @@ func (e *Editor) writeSource(writer io.Writer, fonts map[string][]byte, progress
 				return 0, err
 			}
 		}
-		data, err = editorCreatorXML(data, e.source.fallbackDocID, reader.documentIndex)
+		data, _, err = editorDocInfoXML(data, e.source.fallbackDocID, reader.documentIndex)
 		if err != nil {
 			return 0, err
 		}
@@ -817,7 +817,7 @@ func (e *Editor) sourceReader(ctx context.Context, progress editorProgress) (*Re
 		files = make(map[string][]byte)
 	}
 	maps.Copy(files, parts)
-	reader := &Reader{Zip: e.source.reader.Zip, files: files, encryption: e.encryption, documentIndex: e.source.reader.documentIndex, selectedVersion: e.source.reader.selectedVersion}
+	reader := &Reader{Zip: e.source.reader.Zip, files: files, encryption: e.encryption, documentIndex: e.source.reader.documentIndex, selectedVersion: e.source.reader.selectedVersion, pageContents: e.source.reader.pageContents, resources: e.runtimeResources}
 	if err := reader.initRootContext(ctx); err != nil {
 		return nil, err
 	}
@@ -53,6 +53,7 @@ type editorReferenceScan struct {
 	stack      []string
 	fonts      []*editorFontUsage
 	text       strings.Builder
+	richText   strings.Builder
 	resource   bool
 	capture    bool
 	safe       bool
@@ -140,14 +141,39 @@ func (s *editorReferenceScan) accept(token xml.Token) bool {
 	}
 	switch token := token.(type) {
 	case xml.StartElement:
-		if classifyOFDNamespace(token.Name.Space) == ofdXMLUnknown {
+		rich := token.Name.Space == richTextNamespace
+		known := classifyOFDNamespace(token.Name.Space) != ofdXMLUnknown
+		if rich {
+			known = len(s.stack) == 0 && token.Name.Local == "RichText" || len(s.stack) == 1 && s.stack[0] == "RichText" && token.Name.Local == "ObjectRef"
+		} else if len(s.stack) > 0 && s.stack[0] == "RichText" {
+			known = false
+		}
+		if len(s.stack) > 0 && s.stack[0] == "CustomTags" {
+			known = known && (len(s.stack) == 1 && token.Name.Local == "CustomTag" || len(s.stack) == 2 && s.stack[1] == "CustomTag" && (token.Name.Local == "FileLoc" || token.Name.Local == "SchemaLoc"))
+		}
+		if !known {
 			s.safe = false
 			return false
 		}
-		if token.Name.Local == "CustomTags" || token.Name.Local == "Extensions" || token.Name.Local == "ExtendData" || token.Name.Local == "Data" {
+		if token.Name.Local == "Extensions" || token.Name.Local == "ExtendData" || token.Name.Local == "Data" {
 			s.safe = false
 			return false
 		}
+		if token.Name.Local == "CustomTag" {
+			var kind, namespace string
+			for _, attr := range token.Attr {
+				if attr.Name.Space == "" && attr.Name.Local == "TypeID" {
+					kind = attr.Value
+				}
+				if attr.Name.Space == "" && attr.Name.Local == "NameSpace" {
+					namespace = attr.Value
+				}
+			}
+			if kind != richTextTagType || namespace != richTextNamespace {
+				s.safe = false
+				return false
+			}
+		}
 		if len(s.stack) == 0 {
 			if s.seen {
 				s.safe = false
@@ -181,10 +207,11 @@ func (s *editorReferenceScan) accept(token xml.Token) bool {
 			}
 		}
 		for _, attr := range token.Attr {
-			if attr.Name.Space == "xmlns" || attr.Name.Local == "xmlns" || attr.Name.Local == "xmlns:ofd" || attr.Name.Space == XMLNamespace {
+			if attr.Name.Space == "xmlns" || attr.Name.Local == "xmlns" || attr.Name.Local == "xmlns:ofd" || attr.Name.Space == XMLNamespace || textMetadataAttribute(token.Name, attr) {
 				continue
 			}
-			if attr.Name.Space != "" {
+			custom := len(s.stack) == 0 && token.Name.Local == "CustomTags" || len(s.stack) > 0 && s.stack[0] == "CustomTags"
+			if attr.Name.Space != "" || rich && (token.Name.Local != "ObjectRef" || attr.Name.Local != "PageRef") || custom && (token.Name.Local != "CustomTag" || attr.Name.Local != "TypeID" && attr.Name.Local != "NameSpace") {
 				s.safe = false
 				return false
 			}
@@ -225,6 +252,9 @@ func (s *editorReferenceScan) accept(token xml.Token) bool {
 			s.capture = true
 		}
 	case xml.CharData:
+		if len(s.stack) == 1 && s.stack[0] == "RichText" {
+			s.richText.Write(token)
+		}
 		if len(s.stack) == 0 && len(bytes.Trim(token, " \t\r\n")) != 0 {
 			s.safe = false
 			return false
@@ -233,6 +263,14 @@ func (s *editorReferenceScan) accept(token xml.Token) bool {
 			s.text.Write(token)
 		}
 	case xml.EndElement:
+		if len(s.stack) == 3 && s.stack[0] == "CustomTags" && token.Name.Local == "SchemaLoc" && strings.TrimSpace(s.text.String()) != "" {
+			s.safe = false
+			return false
+		}
+		if len(s.stack) == 1 && s.stack[0] == "RichText" && !richTextMetadataFontSafe(s.richText.String()) {
+			s.safe = false
+			return false
+		}
 		if len(s.stack) == 0 || s.stack[len(s.stack)-1] != token.Name.Local {
 			s.safe = false
 			return false
@@ -25,6 +25,7 @@ import (
 	"image/color"
 	"io"
 	"reflect"
+	"slices"
 	"strconv"
 )

@@ -45,6 +46,12 @@ type richTextMetadata struct {
 	Digest  string     `json:"digest"`
 }

+// richTextSnapshot 保存对象及嵌套成员的不可变编辑语义，成员按绘制顺序定位
+type richTextSnapshot struct {
+	metadata *richTextMetadata
+	children map[int]*richTextSnapshot
+}
+
 // richTextEntry 保存标引入口及延迟报告的损坏诊断
 type richTextEntry struct {
 	index    int
@@ -56,11 +63,13 @@ type richTextEntry struct {
 type richTextIndex struct {
 	source   *editorSource
 	revision uint64
+	remaps   map[string]int
 	entries  map[string]richTextEntry
 	err      error
 }

 // AddRichText 原子添加标准组合及持久化编辑标引，成功时只产生一条历史
+// 按给定宽度排版，高度随内容自适应
 // 入参: page 页面索引, box 页面编辑框, value 富文本内容
 // 返回: string 组合对象标识, error 排版、资源或持久化错误
 func (e *Editor) AddRichText(page int, box Box, value RichText) (string, error) {
@@ -88,12 +97,30 @@ func (e *Editor) AddRichText(page int, box Box, value RichText) (string, error)
 	return id, nil
 }

-// UpdateRichText 原子替换富文本内容，保留对象标识、局部编辑框及页面变换
+// UpdateRichText 原子替换富文本内容，保留对象标识、段落宽度及页面变换，高度随内容调整
 // 安全普通文字显式重排后提升为组合；不修改共享的旧组合资源
 // 入参: page 页面索引, id 对象标识, value 完整富文本
 // 返回: error 识别、排版或提交错误
 func (e *Editor) UpdateRichText(page int, id string, value RichText) error {
-	return e.updateRichTextFrame(page, id, value, 0, 0)
+	return e.updateRichTextFrame(page, id, value, 0, 0, false)
+}
+
+// UpdateTargetRichText 一次提交正文或组合内富文本的内容和局部宽度，保留页面变换
+// 入参: page 页面索引, path 完整对象路径, value 富文本, offset 局部偏移, width 宽度，零值保留宽度模式
+// 返回: error 路径、尺寸或排版错误
+func (e *Editor) UpdateTargetRichText(page int, path ObjectPath, value RichText, offset, width float64) error {
+	if !finite(offset) || !finite(width) || width < 0 || width == 0 && offset != 0 {
+		return fmt.Errorf("invalid text frame")
+	}
+	if len(path.Children) == 0 {
+		if path.Annotation != "" {
+			return ErrNotRichText
+		}
+		return e.updateRichTextFrame(page, path.ID, value, offset, width, false)
+	}
+	index := path.Children[len(path.Children)-1]
+	path.Children = path.Children[:len(path.Children)-1]
+	return e.updateCompositeRichText(page, path, index, value, offset, width, false)
 }

 // ResizeRichTextFrame 调整局部左边界与段落宽度并原子重排，保留页面方向和缩放
@@ -107,29 +134,28 @@ func (e *Editor) ResizeRichTextFrame(page int, id string, offset, width float64)
 	if err != nil {
 		return err
 	}
-	return e.updateRichTextFrame(page, id, value, offset, width)
+	return e.updateRichTextFrame(page, id, value, offset, width, false)
 }

-// updateRichTextFrame 统一提交正文或编辑框变化，width为零时保持原始宽度
-// 入参: page 页面索引, id 对象标识, value 新内容, offset 局部偏移, width 可选宽度
+// updateRichTextFrame 统一提交正文或编辑框变化，width为零时沿用原宽度模式
+// 入参: page 页面索引, id 对象标识, value 新内容, offset 局部偏移, width 可选宽度, reflow 是否显式重排原文
 // 返回: error 校验或提交错误
-func (e *Editor) updateRichTextFrame(page int, id string, value RichText, offset, width float64) error {
+func (e *Editor) updateRichTextFrame(page int, id string, value RichText, offset, width float64, reflow bool) error {
 	return e.Transaction(func(e *Editor) error {
 		old, err := e.Object(page, id)
 		if err != nil {
 			return err
 		}
-		current, err := e.RichText(page, id)
-		if err != nil {
-			return err
-		}
-		frame, matrix, err := e.RichTextFrame(page, id)
+		current, frame, matrix, err := e.PrepareRichText(page, ObjectPath{ID: id}, reflow)
 		if err != nil {
 			return err
 		}
 		if err := value.Validate(); err != nil {
 			return err
 		}
+		if width > 0 {
+			value.AutoWidth = false
+		}
 		if old.Type == "CompositeObject" && offset == 0 && (width == 0 || width == frame.W) && reflect.DeepEqual(normalizeRichText(current), normalizeRichText(value)) {
 			return nil
 		}
@@ -204,13 +230,20 @@ func (e *Editor) RichText(page int, id string) (RichText, error) {
 	if err != nil {
 		return RichText{}, err
 	}
+	return e.richTextObject(page, object)
+}
+
+// richTextObject 读取对象的编辑标引并校验标准内容
+// 入参: page 页面索引, object 当前对象
+// 返回: RichText 编辑内容, error 识别或持久化错误
+func (e *Editor) richTextObject(page int, object GraphicObject) (RichText, error) {
 	if object.Type == "TextObject" {
 		return e.promoteRichText(page, object)
 	}
 	if object.Type != "CompositeObject" {
 		return RichText{}, ErrNotRichText
 	}
-	entry, err := e.richTextEntry(page, id)
+	entry, err := e.richTextEntry(page, editorObjectID(object))
 	if err != nil {
 		return RichText{}, err
 	}
@@ -247,19 +280,8 @@ func (e *Editor) RichTextFrame(page int, id string) (Box, Matrix, error) {
 		return Box{}, Matrix{}, err
 	}
 	if object.Type == "TextObject" {
-		if _, err := e.promoteRichText(page, object); err != nil {
-			return Box{}, Matrix{}, err
-		}
-		frame, err := object.TextObject.TextFrame()
-		if err != nil {
-			return Box{}, Matrix{}, err
-		}
-		box, _ := creationBox(object.TextObject.Boundary)
-		dx, dy, err := e.richPlainOffset(object.TextObject)
-		if err != nil {
-			return Box{}, Matrix{}, err
-		}
-		return Box{W: frame.W, H: frame.H}, TranslationMatrix(box.X, box.Y).Multiply(NewMatrix(object.TextObject.CTM)).Multiply(TranslationMatrix(frame.X+dx, frame.Y+dy)), nil
+		_, frame, matrix, err := e.PrepareRichText(page, ObjectPath{ID: id}, false)
+		return frame, matrix, err
 	}
 	if object.Type != "CompositeObject" {
 		return Box{}, Matrix{}, ErrNotRichText
@@ -275,7 +297,181 @@ func (e *Editor) RichTextFrame(page int, id string) (Box, Matrix, error) {
 	return entry.metadata.Frame, TranslationMatrix(box.X, box.Y).Multiply(NewMatrix(object.CompositeGraphicUnit.CTM)).Multiply(TranslationMatrix(entry.metadata.Offset[0], entry.metadata.Offset[1])), nil
 }

-// prepareRichText 构造独立组合资源和不含字体编号的编辑标引
+// AddCompositeRichText 向内部范围添加富文本，使用页面坐标并保存编辑标引
+// 入参: page 页面索引, path 父路径, box 页面编辑框, value 富文本
+// 返回: int 新成员序号, error 排版或提交错误
+func (e *Editor) AddCompositeRichText(page int, path ObjectPath, box Box, value RichText) (int, error) {
+	var index int
+	err := e.Transaction(func(e *Editor) error {
+		if _, err := creationBox(editorBoxString(box)); err != nil {
+			return err
+		}
+		object, meta, err := e.prepareRichText(box, value)
+		if err != nil {
+			return err
+		}
+		index, err = e.AddCompositeObject(page, path, object)
+		if err != nil {
+			return err
+		}
+		member, err := e.CompositeObject(page, path, index)
+		if err != nil {
+			return err
+		}
+		return e.putCompositeRichTextMetadata(page, member.Object, meta, -1)
+	})
+	return index, err
+}
+
+// CompositeRichText 读取内部富文本值及局部编辑框，不提升未标引的普通文字
+// 入参: page 页面索引, member 当前内部成员快照
+// 返回: RichText 编辑内容, Box 局部编辑框, Matrix 页面变换, error 识别或持久化错误
+func (e *Editor) CompositeRichText(page int, member CompositeMember) (RichText, Box, Matrix, error) {
+	if _, err := e.page(page); err != nil {
+		return RichText{}, Box{}, Matrix{}, err
+	}
+	if member.Object.Type != "CompositeObject" {
+		return RichText{}, Box{}, Matrix{}, ErrNotRichText
+	}
+	value, err := e.richTextObject(page, member.Object)
+	if err != nil {
+		return RichText{}, Box{}, Matrix{}, err
+	}
+	entry, err := e.richTextEntry(page, editorObjectID(member.Object))
+	if err != nil {
+		return RichText{}, Box{}, Matrix{}, err
+	}
+	return value, entry.metadata.Frame, member.Matrix.Multiply(TranslationMatrix(entry.metadata.Offset[0], entry.metadata.Offset[1])), nil
+}
+
+// UpdateCompositeRichText 原子重排内部富文本，保留父变换并隔离共享实例
+// 入参: page 页面索引, path 父路径, index 成员序号, value 富文本, offset 局部横向偏移, width 新段落宽度，零值沿用原宽度模式
+// 返回: error 校验或提交错误
+func (e *Editor) UpdateCompositeRichText(page int, path ObjectPath, index int, value RichText, offset, width float64) error {
+	return e.updateCompositeRichText(page, path, index, value, offset, width, false)
+}
+
+// updateCompositeRichText 统一处理内部文字的安全提升与显式重排
+// 入参: page 页面索引, path 父路径, index 成员序号, value 富文本, offset 局部偏移, width 可选宽度, reflow 是否显式重排
+// 返回: error 校验或提交错误
+func (e *Editor) updateCompositeRichText(page int, path ObjectPath, index int, value RichText, offset, width float64, reflow bool) error {
+	if !finite(offset) || !finite(width) || width < 0 || width == 0 && offset != 0 {
+		return fmt.Errorf("invalid rich text frame")
+	}
+	if width > 0 {
+		value.AutoWidth = false
+	}
+	return e.Transaction(func(e *Editor) error {
+		member, err := e.CompositeObject(page, path, index)
+		if err != nil {
+			return err
+		}
+		if member.Object.Type == "TextObject" {
+			return e.updateCompositePlainRichText(page, path, index, value, offset, width, reflow)
+		}
+		var metadata richTextMetadata
+		entryIndex := -1
+		changed := false
+		err = e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
+			node := nodes[0]
+			current, frame, _, err := e.CompositeRichText(page, members[0])
+			if err != nil {
+				return fmt.Errorf("read composite member %s: %w", editorObjectID(members[0].Object), err)
+			}
+			if err := value.Validate(); err != nil {
+				return err
+			}
+			if offset == 0 && (width == 0 || width == frame.W) && reflect.DeepEqual(normalizeRichText(current), normalizeRichText(value)) {
+				return nil
+			}
+			if node.object.CompositeGraphicUnit.Clips != nil {
+				return fmt.Errorf("clipped rich text requires explicit clip removal before reflow")
+			}
+			entry, err := e.richTextEntry(page, editorObjectID(node.object))
+			if err != nil {
+				return fmt.Errorf("read composite node %s: %w", editorObjectID(node.object), err)
+			}
+			object := cloneEditorData(node.object)
+			if !node.boundaryInCTM {
+				object = compositeBoundary(object, node.parent, true)
+			}
+			unit := &object.CompositeGraphicUnit
+			box, err := creationBox(unit.Boundary)
+			if err != nil {
+				return err
+			}
+			matrix := TranslationMatrix(box.X, box.Y).Multiply(NewMatrix(unit.CTM)).Multiply(TranslationMatrix(entry.metadata.Offset[0]+offset, entry.metadata.Offset[1]))
+			if width > 0 {
+				frame.W = width
+			}
+			next, meta, err := e.prepareRichText(frame, value)
+			if err != nil {
+				return err
+			}
+			placement := richTextPlacement(meta, matrix)
+			unit.ResourceID, unit.Boundary, unit.CTM = next.CompositeGraphicUnit.ResourceID, placement.Boundary, placement.CTM
+			if !node.boundaryInCTM {
+				object = compositeBoundary(object, node.parent, false)
+			}
+			metadata, entryIndex, changed = meta, entry.index, true
+			return node.update(object)
+		})
+		if err != nil || !changed {
+			return err
+		}
+		member, err = e.CompositeObject(page, path, index)
+		if err != nil {
+			return err
+		}
+		if entry, err := e.richTextEntry(page, editorObjectID(member.Object)); err == nil {
+			entryIndex = entry.index
+		} else if !errors.Is(err, ErrNotRichText) {
+			return err
+		}
+		return e.putCompositeRichTextMetadata(page, member.Object, metadata, entryIndex)
+	})
+}
+
+// putCompositeRichTextMetadata 在容器坐标规范化后更新标准内容摘要和编辑标引
+// 入参: page 页面索引, object 当前成员, meta 编辑信息, index 原入口或-1
+// 返回: error 资源或提交错误
+func (e *Editor) putCompositeRichTextMetadata(page int, object GraphicObject, meta richTextMetadata, index int) error {
+	unit, err := e.compositeDefinition(object.CompositeGraphicUnit.ResourceID)
+	if err != nil {
+		return err
+	}
+	meta.Digest = richTextDigest(unit.object.CompositeGraphicUnit.Objects)
+	return e.putRichTextMetadata(page, editorObjectID(object), meta, index)
+}
+
+// putCompositeRichTextCopies 一次读取复制后的选区，按对象顺序恢复富文本标引
+// 入参: page 页面索引, path 父路径, indexes 新成员序号, metadata 选区位置对应的编辑语义
+// 返回: error 读取或提交错误
+func (e *Editor) putCompositeRichTextCopies(page int, path ObjectPath, indexes []int, metadata map[int]*richTextSnapshot) error {
+	if len(metadata) == 0 {
+		return nil
+	}
+	selected := make([]int, 0, len(metadata))
+	values := make([]*richTextSnapshot, 0, len(metadata))
+	for i, index := range indexes {
+		if meta, ok := metadata[i]; ok {
+			selected = append(selected, index)
+			values = append(values, meta)
+		}
+	}
+	members, err := e.CompositeObjectsAt(page, path, selected)
+	if err != nil {
+		return err
+	}
+	for i, member := range members {
+		if err := e.putRichTextSnapshot(page, member.Object, values[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// prepareRichText 构造独立组合资源和不含字体编号的编辑标引，高度随排版内容自适应
 // 入参: box 页面或局部编辑框, value 富文本
 // 返回: GraphicObject 标准组合, richTextMetadata 标引, error 准备错误
 func (e *Editor) prepareRichText(box Box, value RichText) (GraphicObject, richTextMetadata, error) {
@@ -289,8 +485,9 @@ func (e *Editor) prepareRichText(box Box, value RichText) (GraphicObject, richTe
 	if err != nil {
 		return GraphicObject{}, richTextMetadata{}, err
 	}
+	box.W, box.H = result.width, result.bounds.Y+result.bounds.H
 	padX, padY := -min(0, result.bounds.X), -min(0, result.bounds.Y)
-	extent := Box{W: max(box.W, result.bounds.X+result.bounds.W) + padX, H: max(box.H, result.bounds.Y+result.bounds.H) + padY}
+	extent := Box{W: max(box.W, result.bounds.X+result.bounds.W) + padX, H: box.H + padY}
 	if !finite(extent.W) || !finite(extent.H) || extent.W <= 0 || extent.H <= 0 {
 		return GraphicObject{}, richTextMetadata{}, fmt.Errorf("rich text extent exceeds finite range")
 	}
@@ -313,7 +510,7 @@ func (e *Editor) prepareRichText(box Box, value RichText) (GraphicObject, richTe
 	if err != nil {
 		return GraphicObject{}, richTextMetadata{}, err
 	}
-	meta := richTextMetadata{Version: 1, Value: cloneEditorData(value), Frame: Box{W: box.W, H: max(box.H, result.bounds.Y+result.bounds.H)}, Extent: extent, Offset: [2]float64{padX, padY}, Anchors: result.anchors, Digest: richTextDigest(unit.object.CompositeGraphicUnit.Objects)}
+	meta := richTextMetadata{Version: 1, Value: cloneEditorData(value), Frame: Box{W: box.W, H: box.H}, Extent: extent, Offset: [2]float64{padX, padY}, Anchors: result.anchors, Digest: richTextDigest(unit.object.CompositeGraphicUnit.Objects)}
 	for i := range meta.Value.Runs {
 		meta.Value.Runs[i].Format.Font = ""
 	}
@@ -385,9 +582,15 @@ func (e *Editor) richTextEntry(page int, id string) (richTextEntry, error) {
 // 返回: *richTextIndex 只读缓存
 func (e *Editor) richTextMetadataIndex() *richTextIndex {
 	if index := e.richIndex; index != nil && index.source == e.source && index.revision == e.revision {
-		return index
+		valid := len(index.remaps) == len(e.structureRemaps)
+		for page, remaps := range e.structureRemaps {
+			valid = valid && index.remaps[page] == len(remaps)
+		}
+		if valid {
+			return index
+		}
 	}
-	index := &richTextIndex{source: e.source, revision: e.revision, entries: make(map[string]richTextEntry)}
+	index := &richTextIndex{source: e.source, revision: e.revision, remaps: e.structureRemapStarts(), entries: make(map[string]richTextEntry)}
 	e.richIndex = index
 	if e.source == nil {
 		return index
@@ -434,6 +637,17 @@ func (e *Editor) richTextMetadataIndex() *richTextIndex {
 			}
 		}
 	}
+	for page, remaps := range e.structureRemaps {
+		for _, ids := range remaps {
+			for from, to := range ids {
+				if _, exists := index.entries[page+"/"+to]; !exists {
+					if entry, ok := index.entries[page+"/"+from]; ok {
+						index.entries[page+"/"+to] = entry
+					}
+				}
+			}
+		}
+	}
 	return index
 }

@@ -447,7 +661,26 @@ func (e *Editor) putRichTextMetadata(page int, id string, meta richTextMetadata,
 	}
 	root := StructureNode{Name: "RichText", Namespace: richTextNamespace, Text: string(data)}
 	if index >= 0 {
-		return e.UpdateStructureNode(index, nil, root)
+		separate := false
+		err := e.editStructure(index, func(data []byte, node *editorXML, tag CustomTag) ([]byte, error) {
+			updated, err := rewriteStructureReferences(context.Background(), data, tag, func(pageID string, ids []string) (string, []string, error) {
+				var remaining []string
+				for _, objectID := range ids {
+					if editorResourceID(pageID) != editorResourceID(e.pages[page].ID) || editorResourceID(objectID) != editorResourceID(id) {
+						remaining = append(remaining, objectID)
+						separate = true
+					}
+				}
+				return pageID, remaining, nil
+			})
+			if err != nil || separate {
+				return updated, err
+			}
+			return updateStructureNodeXML(data, node, root)
+		})
+		if err != nil || !separate {
+			return err
+		}
 	}
 	root.Children = []StructureNode{{Name: "ObjectRef", Namespace: richTextNamespace, Attributes: []StructureAttribute{{Name: "PageRef", Value: e.pages[page].ID}}, Text: id}}
 	_, err = e.AddStructure(CustomTag{TypeID: richTextTagType, NameSpace: richTextNamespace}, root)
@@ -458,25 +691,31 @@ func (e *Editor) putRichTextMetadata(page int, id string, meta richTextMetadata,
 // 入参: page 页面索引, object 普通文字快照
 // 返回: RichText 单片段, error 不安全提升错误
 func (e *Editor) promoteRichText(page int, object GraphicObject) (RichText, error) {
-	t := object.TextObject
-	unsupported := func() (RichText, error) {
-		return RichText{}, &EditError{Code: EditLayoutRequired, Err: fmt.Errorf("text cannot be safely promoted to rich text")}
-	}
-	layer, _, err := e.findObject(page, t.ID)
+	layer, _, err := e.findObject(page, object.TextObject.ID)
 	if err != nil {
 		return RichText{}, err
 	}
-	if layer.DrawParam != "" || t.DrawParam != "" || t.Clips != nil || len(t.Actions) != 0 || t.Alpha != nil && *t.Alpha != 255 || t.Visible != nil && !*t.Visible || t.Stroke != nil && *t.Stroke || t.Fill != nil && !*t.Fill || t.Decoration != "" || t.VScale != 0 || t.HScale != 0 && t.HScale != 1 || t.ReadDirection != 0 || t.CharDirection != 0 || t.Weight != 0 && t.Weight != 400 && t.Weight != 700 {
-		return unsupported()
+	if origin := e.objectOrigin(object.TextObject.ID); origin != nil && !editorXMLSupported(origin.node) {
+		return RichText{}, &EditError{Code: EditLayoutRequired, Err: fmt.Errorf("text cannot be safely promoted to rich text")}
 	}
-	if origin := e.objectOrigin(t.ID); origin != nil && !editorXMLSupported(origin.node) {
-		return unsupported()
-	}
-	frame, err := t.TextFrame()
+	object, err = e.resolveEditorStyle(object, layer.DrawParam)
 	if err != nil {
+		return RichText{}, err
+	}
+	return e.promoteTextValue(object.TextObject)
+}
+
+// promoteTextValue 校验普通文字是否可无损提升，保留明确段落或可验证单行布局
+// 入参: t 有效文字样式与局部定位
+// 返回: RichText 单片段, error 布局或格式错误
+func (e *Editor) promoteTextValue(t TextObject) (RichText, error) {
+	unsupported := func() (RichText, error) {
+		return RichText{}, &EditError{Code: EditLayoutRequired, Err: fmt.Errorf("text cannot be safely promoted to rich text")}
+	}
+	if t.DrawParam != "" || t.Clips != nil || len(t.Actions) != 0 || t.Alpha != nil && *t.Alpha != 255 || t.Visible != nil && !*t.Visible || t.Stroke != nil && *t.Stroke || t.Fill != nil && !*t.Fill || t.Decoration != "" || t.VScale != 0 || t.HScale != 0 && t.HScale != 1 || t.ReadDirection != 0 || t.CharDirection != 0 || t.Weight != 0 && t.Weight != 400 && t.Weight != 700 {
 		return unsupported()
 	}
-	if frame.X != 0 || frame.Y != 0 || t.CTM != "" && NewMatrix(t.CTM) != (IdentityMatrix) {
+	if _, err := t.TextFrame(); err != nil {
 		return unsupported()
 	}
 	value, layout := t.TextLayout()
@@ -492,7 +731,7 @@ func (e *Editor) promoteRichText(page int, object GraphicObject) (RichText, erro
 		if actual.Index != "" || len(textCodeRunes(actual.Value)) != len(textCodeRunes(expected.Value)) {
 			return unsupported()
 		}
-		if actual.DeltaX != "" && !reflect.DeepEqual(parseFloatsWithG(actual.DeltaX), parseFloatsWithG(expected.DeltaX)) {
+		if !reflect.DeepEqual(parseFloatsWithG(actual.DeltaX), parseFloatsWithG(expected.DeltaX)) {
 			return unsupported()
 		}
 		for _, dy := range parseFloatsWithG(actual.DeltaY) {
@@ -520,22 +759,20 @@ func (e *Editor) promoteRichText(page int, object GraphicObject) (RichText, erro
 		}
 		color = fmt.Sprintf("%d %d %d", r>>8, g>>8, b>>8)
 	}
-	result := RichText{Runs: []RichTextRun{{Text: value, Format: TextFormat{Font: t.Font, Size: t.Size, Color: color, Bold: t.Weight == 700, Italic: t.Italic}}}, Layout: layout}
+	result := RichText{AutoWidth: t.layout == nil || t.layout.autoWidth, Runs: []RichTextRun{{Text: value, Format: TextFormat{Font: t.Font, Size: t.Size, Color: color, Bold: t.Weight == 700, Italic: t.Italic}}}, Layout: layout}
 	return result, result.Validate()
 }

-// richPlainOffset 保存可提升单行原文的基线偏移，不推断复杂定位布局
+// richPlainOffset 计算原首行相对标准排版的位移，保留既有段落和组合内基线
 // 入参: text 已校验的普通文字
 // 返回: float64 横向偏移, float64 基线偏移, error 无效坐标
 func (e *Editor) richPlainOffset(text TextObject) (float64, float64, error) {
-	if text.layout != nil {
-		return 0, 0, nil
-	}
-	if len(text.TextCode) != 1 {
-		return 0, 0, fmt.Errorf("positioned text requires explicit layout")
+	if len(text.TextCode) == 0 {
+		return 0, 0, fmt.Errorf("text codes are empty")
 	}
+	value, layout := text.TextLayout()
 	check := text
-	if err := e.LayoutText(&check, text.Text(), TextLayout{}); err != nil {
+	if err := e.LayoutText(&check, value, layout); err != nil {
 		return 0, 0, err
 	}
 	x, err := strconv.ParseFloat(text.TextCode[0].X, 64)
@@ -550,32 +787,60 @@ func (e *Editor) richPlainOffset(text TextObject) (float64, float64, error) {
 	if err != nil {
 		return 0, 0, err
 	}
-	return x, y - baseline, nil
+	origin, err := strconv.ParseFloat(check.TextCode[0].X, 64)
+	if err != nil {
+		return 0, 0, err
+	}
+	return x - origin, y - baseline, nil
 }

-// copyRichTextMetadata 复制已识别组合的语义，使用目标标准子对象的字体引用
-// 入参: source 来源编辑器, sourcePage 来源页, ids 来源标识, page 目标页, copied 目标标识
-// 返回: error 元数据损坏或提交错误
-func (e *Editor) copyRichTextMetadata(source *Editor, sourcePage int, ids []string, page int, copied []string) error {
+// copyRichTextMetadata 迁移选区及其组合、注解内部的编辑标引，复用标准内容中的字体引用
+// 入参: ctx 取消上下文, source 来源编辑器, sourcePage 来源页, ids 正文标识, annotations 注解标识, page 目标页, copied 新正文标识, copiedNotes 新注解标识
+// 返回: error 元数据损坏、结构不一致或提交错误
+func (e *Editor) copyRichTextMetadata(ctx context.Context, source *Editor, sourcePage int, ids, annotations []string, page int, copied, copiedNotes []string) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	metadata := source.richTextMetadataIndex()
+	if metadata.err != nil || len(metadata.entries) == 0 {
+		return metadata.err
+	}
+	copyObject := func(before, after GraphicObject) error {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+		snapshot, err := source.captureRichTextSnapshot(sourcePage, before)
+		if err != nil || snapshot == nil {
+			return err
+		}
+		if err := e.putRichTextSnapshot(page, after, snapshot); err != nil {
+			return err
+		}
+		return ctx.Err()
+	}
 	for i, id := range ids {
-		object, err := source.Object(sourcePage, id)
+		before, err := source.Object(sourcePage, id)
 		if err != nil {
 			return err
 		}
-		if object.Type != "CompositeObject" {
-			continue
-		}
-		entry, err := source.richTextEntry(sourcePage, id)
-		if errors.Is(err, ErrNotRichText) {
-			continue
-		}
+		after, err := e.Object(page, copied[i])
 		if err != nil {
 			return err
 		}
-		if _, err := source.RichText(sourcePage, id); err != nil {
+		if err := copyObject(before, after); err != nil {
 			return err
 		}
-		if err := e.putRichTextMetadata(page, copied[i], entry.metadata, -1); err != nil {
+	}
+	for i, id := range annotations {
+		before, err := source.Annotation(sourcePage, id)
+		if err != nil {
+			return err
+		}
+		after, err := e.Annotation(page, copiedNotes[i])
+		if err != nil {
+			return err
+		}
+		if err := copyObject(GraphicObject{Type: "CompositeGraphicUnit", CompositeGraphicUnit: CompositeGraphicUnit{Objects: before.Appearance.Objects}}, GraphicObject{Type: "CompositeGraphicUnit", CompositeGraphicUnit: CompositeGraphicUnit{Objects: after.Appearance.Objects}}); err != nil {
 			return err
 		}
 	}
@@ -614,25 +879,18 @@ func (e *Editor) richTextColors(object *GraphicObject) error {

 // copiedRichTextMetadata 检查当前文档对象快照的标引，不将外部同号对象误认成本地对象
 // 入参: objects 待复制快照
-// 返回: map[int]richTextMetadata 需要复制的语义, error 损坏诊断
-func (e *Editor) copiedRichTextMetadata(objects []GraphicObject) (map[int]richTextMetadata, error) {
-	result := make(map[int]richTextMetadata)
+// 返回: map[int]*richTextSnapshot 需要复制的语义, error 损坏诊断
+func (e *Editor) copiedRichTextMetadata(objects []GraphicObject) (map[int]*richTextSnapshot, error) {
+	result := make(map[int]*richTextSnapshot)
 	for i, object := range objects {
-		if object.Type != "CompositeObject" {
+		if object.Type != "CompositeObject" && object.Type != "CompositeGraphicUnit" {
 			continue
 		}
 		if object.origin != nil && e.snapshotOrigin(object) == nil {
 			continue
 		}
 		if object.richText != nil {
-			unit, err := e.compositeDefinition(object.CompositeGraphicUnit.ResourceID)
-			if err != nil {
-				return nil, err
-			}
-			if richTextDigest(unit.object.CompositeGraphicUnit.Objects) != object.richText.Digest {
-				return nil, fmt.Errorf("rich text snapshot resource has changed")
-			}
-			result[i] = cloneEditorData(*object.richText)
+			result[i] = object.richText
 			continue
 		}
 		index := e.richTextMetadataIndex()
@@ -642,45 +900,125 @@ func (e *Editor) copiedRichTextMetadata(objects []GraphicObject) (map[int]richTe
 		if len(index.entries) == 0 {
 			continue
 		}
-		id := editorObjectID(object)
 		for page := range e.pages {
-			entry, err := e.richTextEntry(page, id)
-			if errors.Is(err, ErrNotRichText) {
-				continue
-			}
+			snapshot, err := e.captureRichTextSnapshot(page, object)
 			if err != nil {
 				return nil, err
 			}
-			current, err := e.Object(page, id)
-			if err != nil {
-				continue
+			if snapshot != nil {
+				result[i] = snapshot
+				break
 			}
-			if current.CompositeGraphicUnit.ResourceID != object.CompositeGraphicUnit.ResourceID {
-				continue
-			}
-			if _, err := e.RichText(page, id); err != nil {
-				return nil, err
-			}
-			result[i] = entry.metadata
-			break
 		}
 	}
 	return result, nil
 }

-// attachRichTextSnapshot 为普通对象快照附加不可变编辑语义，复制后不依赖原对象继续存在
+// attachRichTextSnapshot 为对象快照附加嵌套编辑语义，来源删除后仍可跨页粘贴
 // 入参: page 页面索引, object 对象快照
-func (e *Editor) attachRichTextSnapshot(page int, object *GraphicObject) {
-	object.richText = nil
-	if object.Type != "CompositeObject" {
-		return
+// 返回: error 标引或资源错误
+func (e *Editor) attachRichTextSnapshot(page int, object *GraphicObject) error {
+	snapshot, err := e.captureRichTextSnapshot(page, *object)
+	object.richText = snapshot
+	return err
+}
+
+// captureRichTextSnapshot 捕获组合树内的富文本标引，不复制共享二进制资源
+// 入参: page 页面索引, object 根对象
+// 返回: *richTextSnapshot 不可变快照，无标引时为空, error 标引或资源错误
+func (e *Editor) captureRichTextSnapshot(page int, object GraphicObject) (*richTextSnapshot, error) {
+	if object.Type != "CompositeObject" && object.Type != "CompositeGraphicUnit" {
+		return nil, nil
 	}
-	entry, err := e.richTextEntry(page, editorObjectID(*object))
-	if err != nil {
-		return
+	index := e.richTextMetadataIndex()
+	if index.err != nil || len(index.entries) == 0 {
+		return nil, index.err
 	}
-	meta := cloneEditorData(entry.metadata)
-	object.richText = &meta
+	active := make(map[string]bool)
+	var capture func(GraphicObject) (*richTextSnapshot, error)
+	capture = func(object GraphicObject) (*richTextSnapshot, error) {
+		if object.Type != "CompositeObject" && object.Type != "CompositeGraphicUnit" {
+			return nil, nil
+		}
+		entry, err := e.richTextEntry(page, editorObjectID(object))
+		if err == nil {
+			if _, err := e.richTextObject(page, object); err != nil {
+				return nil, err
+			}
+			meta := cloneEditorData(entry.metadata)
+			return &richTextSnapshot{metadata: &meta}, nil
+		}
+		if !errors.Is(err, ErrNotRichText) {
+			return nil, err
+		}
+		unit := object.CompositeGraphicUnit
+		if unit.ResourceID != "" {
+			if active[unit.ResourceID] {
+				return nil, fmt.Errorf("cyclic composite resource")
+			}
+			active[unit.ResourceID] = true
+			defer delete(active, unit.ResourceID)
+			definition, err := e.compositeDefinition(unit.ResourceID)
+			if err != nil {
+				return nil, err
+			}
+			unit = definition.object.CompositeGraphicUnit
+		}
+		var snapshot *richTextSnapshot
+		i := 0
+		for child := range unit.objects() {
+			value, err := capture(child)
+			if err != nil {
+				return nil, err
+			}
+			if value != nil {
+				if snapshot == nil {
+					snapshot = &richTextSnapshot{children: make(map[int]*richTextSnapshot)}
+				}
+				snapshot.children[i] = value
+			}
+			i++
+		}
+		return snapshot, nil
+	}
+	return capture(object)
+}
+
+// putRichTextSnapshot 恢复复制后的嵌套标引，按目标标准内容更新摘要和字体映射
+// 入参: page 目标页, object 复制后的对象, snapshot 来源不可变语义
+// 返回: error 结构或标引错误
+func (e *Editor) putRichTextSnapshot(page int, object GraphicObject, snapshot *richTextSnapshot) error {
+	if snapshot.metadata != nil {
+		index := -1
+		if entry, err := e.richTextEntry(page, editorObjectID(object)); err == nil {
+			index = entry.index
+		} else if !errors.Is(err, ErrNotRichText) {
+			return err
+		}
+		return e.putCompositeRichTextMetadata(page, object, *snapshot.metadata, index)
+	}
+	unit := object.CompositeGraphicUnit
+	if unit.ResourceID != "" {
+		definition, err := e.compositeDefinition(unit.ResourceID)
+		if err != nil {
+			return err
+		}
+		unit = definition.object.CompositeGraphicUnit
+	}
+	i, count := 0, 0
+	for child := range unit.objects() {
+		if value := snapshot.children[i]; value != nil {
+			if err := e.putRichTextSnapshot(page, child, value); err != nil {
+				return err
+			}
+			count++
+		}
+		i++
+	}
+	if count != len(snapshot.children) {
+		return fmt.Errorf("copied composite structure differs")
+	}
+	return nil
 }

 // richTextTagsFontSafe 仅允许完整识别且不含资源编号的本库标引通过字体重绑定检查
@@ -708,22 +1046,7 @@ func richTextTagsFontSafe(ctx context.Context, reader *Reader, index int) (bool,
 		if root.Name != "RichText" || root.Namespace != richTextNamespace || len(root.Attributes) != 0 {
 			return false, nil
 		}
-		var meta richTextMetadata
-		decoder := json.NewDecoder(bytes.NewBufferString(root.Text))
-		decoder.DisallowUnknownFields()
-		if err := decoder.Decode(&meta); err != nil {
-			return false, nil
-		}
-		if decoder.Decode(new(any)) != io.EOF || meta.Version != 1 {
-			return false, nil
-		}
-		for i := range meta.Value.Runs {
-			if meta.Value.Runs[i].Format.Font != "" {
-				return false, nil
-			}
-			meta.Value.Runs[i].Format.Font = "1"
-		}
-		if err := meta.Value.Validate(); err != nil {
+		if !richTextMetadataFontSafe(root.Text) {
 			return false, nil
 		}
 		for _, child := range root.Children {
@@ -734,3 +1057,214 @@ func richTextTagsFontSafe(ctx context.Context, reader *Reader, index int) (bool,
 	}
 	return true, ctx.Err()
 }
+
+// richTextMetadataFontSafe 核对本库富文本元数据不包含字体资源编号或未知字段
+// 入参: value 元数据JSON
+// 返回: bool 是否可由标准图元完整统计字体引用
+func richTextMetadataFontSafe(value string) bool {
+	var meta richTextMetadata
+	decoder := json.NewDecoder(bytes.NewBufferString(value))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(&meta); err != nil {
+		return false
+	}
+	if decoder.Decode(new(any)) != io.EOF || meta.Version != 1 {
+		return false
+	}
+	for i := range meta.Value.Runs {
+		if meta.Value.Runs[i].Format.Font != "" {
+			return false
+		}
+		meta.Value.Runs[i].Format.Font = "1"
+	}
+	if err := meta.Value.Validate(); err != nil {
+		return false
+	}
+	return true
+}
+
+// formatCompositeText 修改内部富文本格式，普通文字安全提升后保留原实例变换
+// 入参: page 页面索引, path 父路径, index 成员序号, patch 格式增量, reflow 显式重排
+// 返回: error 识别、排版或提交错误
+func (e *Editor) formatCompositeText(page int, path ObjectPath, index int, patch TextFormatPatch, reflow bool) error {
+	value, _, _, err := e.PrepareRichText(page, ObjectPath{ID: path.ID, Annotation: path.Annotation, Children: append(slices.Clone(path.Children), index)}, reflow)
+	if err != nil {
+		return err
+	}
+	if err := value.ApplyFormat(0, value.Len(), patch); err != nil {
+		return err
+	}
+	return e.updateCompositeRichText(page, path, index, value, 0, 0, reflow)
+}
+
+// updateCompositePlainRichText 将可验证布局的内部文字提升为富文本并保留实例坐标
+// 入参: page 页面索引, path 父路径, index 成员序号, value 富文本内容, offset 局部偏移, width 可选宽度, reflow 是否显式重排
+// 返回: error 校验或提交错误
+func (e *Editor) updateCompositePlainRichText(page int, path ObjectPath, index int, value RichText, offset, width float64, reflow bool) error {
+	target := ObjectPath{ID: path.ID, Annotation: path.Annotation, Children: append(slices.Clone(path.Children), index)}
+	_, frame, matrix, err := e.PrepareRichText(page, target, reflow)
+	if err != nil {
+		return err
+	}
+	matrix = matrix.Multiply(TranslationMatrix(offset, 0))
+	if width > 0 {
+		frame.W = width
+	}
+	var metadata richTextMetadata
+	if err := e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
+		node := nodes[0]
+		if node.object.Type != "TextObject" || !editorXMLSupported(node.span) {
+			return ErrNotRichText
+		}
+		inverse, ok := node.parent.Invert()
+		if !ok {
+			return fmt.Errorf("invalid composite parent transform")
+		}
+		next, meta, err := e.prepareRichText(Box{W: frame.W, H: frame.H}, value)
+		if err != nil {
+			return err
+		}
+		unit := richTextPlacement(meta, inverse.Multiply(matrix))
+		unit.ID, unit.ResourceID = node.object.TextObject.ID, next.CompositeGraphicUnit.ResourceID
+		next.CompositeGraphicUnit = unit
+		if !node.boundaryInCTM {
+			next = compositeBoundary(next, node.parent, false)
+		}
+		metadata = meta
+		return node.update(next)
+	}); err != nil {
+		return err
+	}
+	member, err := e.CompositeObject(page, path, index)
+	if err != nil {
+		return err
+	}
+	return e.putCompositeRichTextMetadata(page, member.Object, metadata, -1)
+}
+
+// TargetRichText 读取完整路径文字的富文本模型，普通文字仅在可验证布局时提升
+// 入参: page 页面索引, path 完整对象路径
+// 返回: RichText 独立模型, error 路径或不安全提升错误
+func (e *Editor) TargetRichText(page int, path ObjectPath) (RichText, error) {
+	value, _, _, err := e.PrepareRichText(page, path, false)
+	return value, err
+}
+
+// PrepareRichText 读取独立富文本模型和局部编辑框，定位文字采用自然宽度，已知段落保留宽度
+// 显式重排保留原首行起点及页面变换，不从原始Boundary推断段落宽度
+// 入参: page 页面索引, path 完整对象路径, reflow 是否允许重排普通文字
+// 返回: RichText 内容, Box 局部编辑框, Matrix 页面变换, error 路径、外观或排版错误
+func (e *Editor) PrepareRichText(page int, path ObjectPath, reflow bool) (RichText, Box, Matrix, error) {
+	var text TextObject
+	var matrix Matrix
+	if len(path.Children) == 0 {
+		if path.Annotation != "" {
+			return RichText{}, Box{}, Matrix{}, ErrNotRichText
+		}
+		object, err := e.Object(page, path.ID)
+		if err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+		if object.Type != "TextObject" {
+			value, err := e.RichText(page, path.ID)
+			if err != nil {
+				return RichText{}, Box{}, Matrix{}, err
+			}
+			frame, matrix, err := e.RichTextFrame(page, path.ID)
+			return value, frame, matrix, err
+		}
+		if origin := e.objectOrigin(path.ID); origin != nil && !editorXMLSupported(origin.node) {
+			return RichText{}, Box{}, Matrix{}, ErrNotRichText
+		}
+		layer, _, err := e.findObject(page, path.ID)
+		if err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+		object, err = e.resolveEditorStyle(object, layer.DrawParam)
+		if err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+		text = object.TextObject
+		box, err := creationBox(text.Boundary)
+		if err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+		matrix = TranslationMatrix(box.X, box.Y).Multiply(NewMatrix(text.CTM))
+	} else {
+		index := path.Children[len(path.Children)-1]
+		path.Children = path.Children[:len(path.Children)-1]
+		member, err := e.CompositeObject(page, path, index)
+		if err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+		if member.Object.Type != "TextObject" {
+			return e.CompositeRichText(page, member)
+		}
+		text, matrix = member.Object.TextObject, member.Matrix
+	}
+	frame, err := text.TextFrame()
+	if err != nil {
+		return RichText{}, Box{}, Matrix{}, err
+	}
+	dx, dy, err := e.richPlainOffset(text)
+	if err != nil {
+		return RichText{}, Box{}, Matrix{}, err
+	}
+	autoWidth := text.layout == nil || text.layout.autoWidth
+	if reflow {
+		value, layout := text.TextLayout()
+		layout.AutoBidi = true
+		if err := e.LayoutText(&text, value, layout); err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+	}
+	value, err := e.promoteTextValue(text)
+	if err != nil {
+		return RichText{}, Box{}, Matrix{}, err
+	}
+	value.AutoWidth = autoWidth
+	if autoWidth {
+		result, err := e.layoutRichText(value, frame.W)
+		if err != nil {
+			return RichText{}, Box{}, Matrix{}, err
+		}
+		frame.W, frame.H = result.width, result.bounds.Y+result.bounds.H
+	}
+	return value, Box{W: frame.W, H: frame.H}, matrix.Multiply(TranslationMatrix(dx, dy)), nil
+}
+
+// ReflowRichText 原子重排完整路径文字，保留局部宽度、页面变换及共享实例隔离
+// 入参: page 页面索引, path 完整对象路径, value 新的富文本内容
+// 返回: error 路径、排版或提交错误
+func (e *Editor) ReflowRichText(page int, path ObjectPath, value RichText) error {
+	if len(path.Children) == 0 {
+		if path.Annotation != "" {
+			return ErrNotRichText
+		}
+		return e.updateRichTextFrame(page, path.ID, value, 0, 0, true)
+	}
+	index := path.Children[len(path.Children)-1]
+	path.Children = path.Children[:len(path.Children)-1]
+	return e.updateCompositeRichText(page, path, index, value, 0, 0, true)
+}
+
+// LayoutTextFrame 统一调整普通文字及富文本的段落选项和局部宽度，保留原首行起点与页面变换
+// 对齐应用于所有段落；定位文字沿用自然宽度，显式改宽后采用固定宽度，提交一条撤销记录
+// 入参: page 页面索引, path 完整对象路径, options 段落选项, offset 左边界局部偏移, width 新宽度，零值保留宽度模式
+// 返回: error 路径、尺寸或排版错误
+func (e *Editor) LayoutTextFrame(page int, path ObjectPath, options TextLayout, offset, width float64) error {
+	if !finite(offset) || !finite(width) || width < 0 || width == 0 && offset != 0 {
+		return fmt.Errorf("invalid text frame")
+	}
+	value, _, _, err := e.PrepareRichText(page, path, true)
+	if err != nil {
+		return err
+	}
+	value.Layout, value.Paragraphs = options, nil
+	if len(path.Children) == 0 {
+		return e.updateRichTextFrame(page, path.ID, value, offset, width, true)
+	}
+	index := path.Children[len(path.Children)-1]
+	path.Children = path.Children[:len(path.Children)-1]
+	return e.updateCompositeRichText(page, path, index, value, offset, width, true)
+}
@@ -15,18 +15,29 @@
 package ofdgo

 import (
+	"cmp"
+	"context"
 	"fmt"
+	"io"
 	"math"
 	"slices"
+	"strings"
 )

-// ObjectSelection 保存正文与注解的独立快照，共享当前编辑器的不可变资源
+// ObjectSelection 保存正文、注解及组合成员的独立快照，共享当前编辑器的不可变资源
 // 来源修改、删除或撤销不改变快照，不用于跨文档传输
 type ObjectSelection struct {
 	editor      *Editor
 	document    editorDocumentIdentity
 	objects     []GraphicObject
 	annotations *AnnotationSelection
+	parts       []editorSelectionPart
+}
+
+// editorSelectionPart 保存按绘制顺序排列的顶层或内部对象快照
+type editorSelectionPart struct {
+	objects   []GraphicObject
+	composite *CompositeSelection
 }

 // SelectionBounds 获取正文与注解混合选区的实际范围，复用同一次度量的资源缓存
@@ -400,6 +411,18 @@ func (e *Editor) PasteSelection(page int, selection *ObjectSelection, dx, dy flo
 		if err == nil && selection.annotations != nil {
 			annotations, err = edit.PasteAnnotations(page, selection.annotations, dx, dy)
 		}
+		for _, part := range selection.parts {
+			if err != nil {
+				return err
+			}
+			var ids []string
+			if part.composite != nil {
+				ids, err = edit.PasteCompositeSelection(page, part.composite, dx, dy)
+			} else {
+				ids, err = edit.CopyObjects(page, part.objects, dx, dy)
+			}
+			objects = append(objects, ids...)
+		}
 		return err
 	})
 	if err != nil {
@@ -418,5 +441,770 @@ func (e *Editor) PasteSelectionToComposite(page int, path ObjectPath, selection
 	if selection.annotations != nil {
 		return nil, fmt.Errorf("annotations cannot be nested in a page object")
 	}
-	return e.CopyObjectsToComposite(page, path, selection.objects, dx, dy)
+	var indexes []int
+	err := e.Transaction(func(edit *Editor) error {
+		var err error
+		indexes, err = edit.CopyObjectsToComposite(page, path, selection.objects, dx, dy)
+		for _, part := range selection.parts {
+			if err != nil {
+				return err
+			}
+			var next []int
+			if part.composite != nil {
+				next, err = edit.PasteCompositeObjects(page, path, part.composite, dx, dy)
+			} else {
+				next, err = edit.CopyObjectsToComposite(page, path, part.objects, dx, dy)
+			}
+			indexes = append(indexes, next...)
+		}
+		return err
+	})
+	return indexes, err
+}
+
+// editorTargetGroup 保存同一父路径的直接成员，结构操作按逆序处理父路径
+type editorTargetGroup struct {
+	path    ObjectPath
+	indexes []int
+}
+
+// editorTargetGroups 分离顶层与内部选区，拒绝重复或相互包含的路径
+// 入参: paths 完整对象路径
+// 返回: []string 正文标识, []string 注解标识, []editorTargetGroup 内部成员, error 路径错误
+func editorTargetGroups(paths []ObjectPath) ([]string, []string, []editorTargetGroup, error) {
+	var objects, annotations []string
+	var groups []editorTargetGroup
+	for i, path := range paths {
+		if (path.ID == "") == (path.Annotation == "") || slices.ContainsFunc(path.Children, func(index int) bool { return index < 0 }) {
+			return nil, nil, nil, fmt.Errorf("invalid object path")
+		}
+		for _, other := range paths[:i] {
+			length := min(len(path.Children), len(other.Children))
+			if path.ID == other.ID && path.Annotation == other.Annotation && slices.Equal(path.Children[:length], other.Children[:length]) {
+				return nil, nil, nil, fmt.Errorf("selection paths overlap")
+			}
+		}
+		if len(path.Children) == 0 {
+			if path.Annotation != "" {
+				annotations = append(annotations, path.Annotation)
+			} else {
+				objects = append(objects, path.ID)
+			}
+			continue
+		}
+		index := path.Children[len(path.Children)-1]
+		path.Children = slices.Clone(path.Children[:len(path.Children)-1])
+		group := slices.IndexFunc(groups, func(group editorTargetGroup) bool {
+			return path.ID == group.path.ID && path.Annotation == group.path.Annotation && slices.Equal(path.Children, group.path.Children)
+		})
+		if group < 0 {
+			groups = append(groups, editorTargetGroup{path: path, indexes: []int{index}})
+		} else {
+			groups[group].indexes = append(groups[group].indexes, index)
+		}
+	}
+	slices.SortFunc(groups, func(a, b editorTargetGroup) int {
+		if order := cmp.Compare(a.path.ID, b.path.ID); order != 0 {
+			return order
+		}
+		if order := cmp.Compare(a.path.Annotation, b.path.Annotation); order != 0 {
+			return order
+		}
+		return -slices.Compare(a.path.Children, b.path.Children)
+	})
+	return objects, annotations, groups, nil
+}
+
+// editTargets 原子处理跨容器选区，结构变化从后向前避免路径位移
+// 入参: paths 完整对象路径, root 顶层处理, member 内部处理
+// 返回: error 路径或编辑错误
+func (e *Editor) editTargets(paths []ObjectPath, root func([]string, []string) error, member func(ObjectPath, []int) error) error {
+	objects, annotations, groups, err := editorTargetGroups(paths)
+	if err != nil {
+		return err
+	}
+	return e.Transaction(func(*Editor) error {
+		for _, group := range groups {
+			if err := member(group.path, group.indexes); err != nil {
+				return err
+			}
+		}
+		if len(objects)+len(annotations) != 0 {
+			return root(objects, annotations)
+		}
+		return nil
+	})
+}
+
+// CaptureTargets 捕获跨容器选区，内部快照保留源变换与裁剪，源删除不影响粘贴
+// 入参: page 页面索引, paths 完整对象路径
+// 返回: *ObjectSelection 独立快照, error 路径或资源错误
+func (e *Editor) CaptureTargets(page int, paths []ObjectPath) (*ObjectSelection, error) {
+	objects, annotations, groups, err := editorTargetGroups(paths)
+	if err != nil {
+		return nil, err
+	}
+	if len(groups) == 0 {
+		return e.CaptureSelection(page, objects, annotations)
+	}
+	selection, err := e.CaptureSelection(page, nil, annotations)
+	if err != nil {
+		return nil, err
+	}
+	content, err := e.page(page)
+	if err != nil {
+		return nil, err
+	}
+	positions := e.objectPositions(content)
+	paths = slices.Clone(paths)
+	slices.SortStableFunc(paths, func(a, b ObjectPath) int {
+		if a.ID != b.ID {
+			if a.ID == "" {
+				return 1
+			}
+			if b.ID == "" {
+				return -1
+			}
+			return compareEditorPosition(positions[a.ID], positions[b.ID])
+		}
+		if a.Annotation != b.Annotation {
+			return cmp.Compare(a.Annotation, b.Annotation)
+		}
+		return slices.Compare(a.Children, b.Children)
+	})
+	for _, path := range paths {
+		if len(path.Children) == 0 {
+			if path.Annotation != "" {
+				continue
+			}
+			items, err := e.Objects(page, []string{path.ID})
+			if err != nil {
+				return nil, err
+			}
+			selection.parts = append(selection.parts, editorSelectionPart{objects: items})
+		} else {
+			index := path.Children[len(path.Children)-1]
+			path.Children = path.Children[:len(path.Children)-1]
+			composite, err := e.CaptureCompositeObjects(page, path, []int{index})
+			if err != nil {
+				return nil, err
+			}
+			selection.parts = append(selection.parts, editorSelectionPart{composite: composite})
+		}
+	}
+	return selection, nil
+}
+
+// TransformTargets 按页面坐标原子变换跨容器选区，保留组合结构
+// 入参: page 页面索引, paths 完整对象路径, matrix 有限可逆变换
+// 返回: error 路径、变换或编辑错误
+func (e *Editor) TransformTargets(page int, paths []ObjectPath, matrix Matrix) error {
+	if _, ok := matrix.Invert(); !ok {
+		return fmt.Errorf("selection transform must be finite and invertible")
+	}
+	return e.editTargets(paths, func(objects, annotations []string) error {
+		return e.TransformSelection(page, objects, annotations, matrix)
+	}, func(path ObjectPath, indexes []int) error {
+		return e.changeCompositeObjects(page, path, indexes, func(Box) Matrix { return matrix })
+	})
+}
+
+// DeleteTargets 原子删除跨容器选区，一次撤销恢复全部
+// 入参: page 页面索引, paths 完整对象路径
+// 返回: error 路径或编辑错误
+func (e *Editor) DeleteTargets(page int, paths []ObjectPath) error {
+	return e.editTargets(paths, func(objects, annotations []string) error {
+		return e.DeleteSelection(page, objects, annotations)
+	}, func(path ObjectPath, indexes []int) error {
+		return e.DeleteCompositeObjects(page, path, indexes)
+	})
+}
+
+// StyleTargets 原子设置跨容器选区样式，一次撤销恢复全部
+// 入参: page 页面索引, paths 完整对象路径, style 样式增量
+// 返回: error 路径或编辑错误
+func (e *Editor) StyleTargets(page int, paths []ObjectPath, style ObjectStyle) error {
+	return e.editTargets(paths, func(objects, annotations []string) error {
+		return e.StyleSelection(page, objects, annotations, style)
+	}, func(path ObjectPath, indexes []int) error {
+		return e.StyleCompositeObjects(page, path, indexes, style)
+	})
+}
+
+// EraseTargets 按页面矩形原子擦除跨容器选区，一次撤销恢复全部
+// 入参: page 页面索引, paths 完整对象路径, box 页面毫米范围
+// 返回: error 路径或编辑错误
+func (e *Editor) EraseTargets(page int, paths []ObjectPath, box Box) error {
+	return e.editTargets(paths, func(objects, annotations []string) error {
+		return e.EraseSelection(page, objects, annotations, box)
+	}, func(path ObjectPath, indexes []int) error {
+		return e.EraseCompositeObjects(page, path, indexes, box)
+	})
+}
+
+// EraseTargetsPath 按页面多边形原子擦除跨容器选区，一次撤销恢复全部
+// 入参: page 页面索引, paths 完整对象路径, points 页面毫米多边形
+// 返回: error 路径或编辑错误
+func (e *Editor) EraseTargetsPath(page int, paths []ObjectPath, points []Point) error {
+	return e.editTargets(paths, func(objects, annotations []string) error {
+		return e.EraseSelectionPath(page, objects, annotations, points)
+	}, func(path ObjectPath, indexes []int) error {
+		return e.EraseCompositeObjectsPath(page, path, indexes, points)
+	})
+}
+
+// CopyTargetsStyle 原子复制样式至跨容器选区，保留各对象内容及位置
+// 入参: page 页面索引, paths 完整对象路径, source 样式来源
+// 返回: error 路径或样式错误
+func (e *Editor) CopyTargetsStyle(page int, paths []ObjectPath, source GraphicObject) error {
+	return e.editTargets(paths, func(objects, annotations []string) error {
+		if err := e.CopyStyle(page, objects, source); err != nil {
+			return err
+		}
+		return e.editSelectionAnnotations(page, annotations, func(path ObjectPath, indexes []int) error {
+			return e.CopyCompositeStyle(page, path, indexes, source)
+		})
+	}, func(path ObjectPath, indexes []int) error {
+		return e.CopyCompositeStyle(page, path, indexes, source)
+	})
+}
+
+// targetGeometry 度量跨容器选区，保留输入顺序及独立宽高能力
+// 入参: page 页面索引, paths 完整对象路径
+// 返回: []Box 对象范围, bool 可独立缩放宽高, Box 页面范围, error 度量错误
+func (e *Editor) targetGeometry(page int, paths []ObjectPath) ([]Box, bool, Box, error) {
+	if _, _, _, err := editorTargetGroups(paths); err != nil {
+		return nil, false, Box{}, err
+	}
+	_, _, paper, err := e.selectionGeometry(page, nil, nil)
+	if err != nil {
+		return nil, false, Box{}, err
+	}
+	boxes := make([]Box, len(paths))
+	stretch := true
+	for i, path := range paths {
+		if len(path.Children) != 0 {
+			index := path.Children[len(path.Children)-1]
+			path.Children = path.Children[:len(path.Children)-1]
+			member, err := e.CompositeObject(page, path, index)
+			if err != nil {
+				return nil, false, Box{}, err
+			}
+			boxes[i] = member.Bounds
+			stretch = stretch && member.Capabilities.Stretch
+		} else {
+			var objects, annotations []string
+			if path.Annotation != "" {
+				annotations = []string{path.Annotation}
+			} else {
+				objects = []string{path.ID}
+				capability, err := e.ObjectCapabilities(page, path.ID)
+				if err != nil {
+					return nil, false, Box{}, err
+				}
+				stretch = stretch && capability.Stretch
+			}
+			boxes[i], err = e.SelectionBounds(page, objects, annotations)
+			if err != nil {
+				return nil, false, Box{}, err
+			}
+		}
+	}
+	return boxes, stretch, paper, nil
+}
+
+// TargetsBounds 获取跨容器选区的共同可见范围
+// 入参: page 页面索引, paths 完整对象路径
+// 返回: Box 页面毫米范围, error 路径或度量错误
+func (e *Editor) TargetsBounds(page int, paths []ObjectPath) (Box, error) {
+	objects, annotations, groups, err := editorTargetGroups(paths)
+	if err != nil {
+		return Box{}, err
+	}
+	if len(groups) == 0 {
+		return e.SelectionBounds(page, objects, annotations)
+	}
+	boxes, _, _, err := e.targetGeometry(page, paths)
+	if err != nil {
+		return Box{}, err
+	}
+	var bounds Box
+	for _, box := range boxes {
+		bounds = unionTextBox(bounds, box)
+	}
+	if bounds.W <= 0 || bounds.H <= 0 {
+		return Box{}, fmt.Errorf("selection has no visible bounds")
+	}
+	return bounds, nil
+}
+
+// orientTargets 绕跨容器选区中心应用旋转或镜像
+// 入参: page 页面索引, paths 完整对象路径, matrix 方向变换
+// 返回: error 路径或变换错误
+func (e *Editor) orientTargets(page int, paths []ObjectPath, matrix Matrix) error {
+	bounds, err := e.TargetsBounds(page, paths)
+	if err != nil {
+		return err
+	}
+	x, y := bounds.X+bounds.W/2, bounds.Y+bounds.H/2
+	return e.TransformTargets(page, paths, TranslationMatrix(x, y).Multiply(matrix).Multiply(TranslationMatrix(-x, -y)))
+}
+
+// RotateTargets 绕共同中心旋转跨容器选区
+// 入参: page 页面索引, paths 完整对象路径, degrees 顺时针直角角度
+// 返回: error 路径或变换错误
+func (e *Editor) RotateTargets(page int, paths []ObjectPath, degrees int) error {
+	matrix, err := editorRotation(degrees)
+	if err != nil {
+		return err
+	}
+	return e.orientTargets(page, paths, matrix)
+}
+
+// FlipTargets 绕共同中心镜像跨容器选区
+// 入参: page 页面索引, paths 完整对象路径, axis 为horizontal或vertical
+// 返回: error 路径或变换错误
+func (e *Editor) FlipTargets(page int, paths []ObjectPath, axis string) error {
+	matrix, err := editorFlip(axis)
+	if err != nil {
+		return err
+	}
+	return e.orientTargets(page, paths, matrix)
+}
+
+// ResizeTargets 按共同范围调整跨容器选区，不重排文字
+// 入参: page 页面索引, paths 完整对象路径, box 页面毫米目标范围
+// 返回: error 路径、范围或编辑错误
+func (e *Editor) ResizeTargets(page int, paths []ObjectPath, box Box) error {
+	objects, annotations, groups, err := editorTargetGroups(paths)
+	if err != nil {
+		return err
+	}
+	if len(groups) == 0 {
+		return e.ResizeSelection(page, objects, annotations, box)
+	}
+	if err := validateCreationBox(box); err != nil {
+		return err
+	}
+	boxes, stretch, _, err := e.targetGeometry(page, paths)
+	if err != nil {
+		return err
+	}
+	var bounds Box
+	for _, member := range boxes {
+		bounds = unionTextBox(bounds, member)
+	}
+	if bounds.W <= 0 || bounds.H <= 0 {
+		return fmt.Errorf("selection has no visible bounds")
+	}
+	sx, sy := box.W/bounds.W, box.H/bounds.H
+	if math.Abs(sx-sy) > 1e-9*math.Max(sx, sy) {
+		if !stretch {
+			return fmt.Errorf("nonuniform resizing requires images or image-only groups")
+		}
+	} else {
+		sy = sx
+	}
+	return e.TransformTargets(page, paths, Matrix{a: sx, d: sy, e: box.X - bounds.X*sx, f: box.Y - bounds.Y*sy})
+}
+
+// DistributionAxes 获取选区可保持位置顺序的等间距分布方向，不修改文档或历史
+// 入参: page 页面索引, paths 按绘制顺序排列的完整路径
+// 返回: []string 可用的horizontal和vertical方向, error 路径或度量错误
+func (e *Editor) DistributionAxes(page int, paths []ObjectPath) ([]string, error) {
+	objects, annotations, groups, err := editorTargetGroups(paths)
+	if err != nil {
+		return nil, err
+	}
+	var boxes []Box
+	var positions []editorObjectPosition
+	if len(groups) == 0 {
+		boxes, positions, _, err = e.selectionGeometry(page, objects, annotations)
+	} else {
+		boxes, _, _, err = e.targetGeometry(page, paths)
+		positions = make([]editorObjectPosition, len(paths))
+		for i := range positions {
+			positions[i].index = i
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	axes := []string{}
+	if len(boxes) < 3 {
+		return axes, nil
+	}
+	for _, axis := range []string{"horizontal", "vertical"} {
+		if _, err := editorDistribution(boxes, positions, axis); err == nil {
+			axes = append(axes, axis)
+		}
+	}
+	return axes, nil
+}
+
+// ArrangeTargets 对齐或等距分布跨容器选区，单选对齐页面
+// 入参: page 页面索引, paths 按绘制顺序排列的完整路径, distribute 是否分布, direction 对齐方向或分布轴
+// 返回: error 路径、方向或编辑错误
+func (e *Editor) ArrangeTargets(page int, paths []ObjectPath, distribute bool, direction string) error {
+	objects, annotations, groups, err := editorTargetGroups(paths)
+	if err != nil {
+		return err
+	}
+	if len(groups) == 0 {
+		if distribute {
+			return e.DistributeSelection(page, objects, annotations, direction)
+		}
+		return e.AlignSelection(page, objects, annotations, direction)
+	}
+	if distribute && direction != "horizontal" && direction != "vertical" || !distribute && !slices.Contains([]string{"left", "center", "right", "top", "middle", "bottom"}, direction) {
+		return fmt.Errorf("invalid arrangement direction %q", direction)
+	}
+	boxes, _, target, err := e.targetGeometry(page, paths)
+	if err != nil {
+		return err
+	}
+	matrices := make([]Matrix, len(paths))
+	if distribute {
+		positions := make([]editorObjectPosition, len(paths))
+		for i := range positions {
+			positions[i].index = i
+		}
+		matrices, err = editorDistribution(boxes, positions, direction)
+		if err != nil {
+			return err
+		}
+	} else {
+		if len(paths) > 1 {
+			target = Box{}
+			for _, box := range boxes {
+				target = unionTextBox(target, box)
+			}
+		}
+		for i, box := range boxes {
+			matrices[i] = editorAlignment(box, target, direction)
+		}
+	}
+	return e.Transaction(func(edit *Editor) error {
+		for i, matrix := range matrices {
+			if matrix != IdentityMatrix {
+				if err := edit.TransformTargets(page, paths[i:i+1], matrix); err != nil {
+					return err
+				}
+			}
+		}
+		return nil
+	})
+}
+
+// StyleTargetsText 原子修改跨容器文字样式，保留各自定位及组合结构
+// 入参: page 页面索引, paths 完整文字路径, style 字体、字号或颜色增量
+// 返回: error 路径、文字或样式错误
+func (e *Editor) StyleTargetsText(page int, paths []ObjectPath, style TextStyle) error {
+	patch := TextFormatPatch{}
+	if style.Font != "" {
+		patch.Font = &style.Font
+	}
+	if style.Size != 0 {
+		patch.Size = &style.Size
+	}
+	if style.Color != "" {
+		patch.Color = &style.Color
+	}
+	return e.formatTargetsText(page, paths, patch, style.Reflow)
+}
+
+// FormatTargetsText 原子修改普通文字和富文本的指定格式，保留未指定的混排属性
+// 入参: page 页面索引, paths 完整文字路径, patch 格式增量
+// 返回: error 路径、格式或不安全重排错误
+func (e *Editor) FormatTargetsText(page int, paths []ObjectPath, patch TextFormatPatch) error {
+	return e.formatTargetsText(page, paths, patch, false)
+}
+
+// TextFontStyle 标识文字引用的字体资源及显式粗斜体样式
+type TextFontStyle struct {
+	Font   string `json:"font"`
+	Bold   bool   `json:"bold"`
+	Italic bool   `json:"italic"`
+}
+
+// TextFontChange 描述一种原字体款式到目标字体款式的替换
+type TextFontChange struct {
+	From TextFontStyle `json:"from"`
+	To   TextFontStyle `json:"to"`
+}
+
+// StyleTargetsFonts 原子替换跨容器文字的各款式，保留混排属性及对象变换
+// 目标字体须已注册，可用Transaction将AddFont与本操作合并为一条历史记录
+// 入参: page 页面索引, paths 完整文字路径, changes 字体款式映射, reflow 允许显式重排
+// 返回: error 字体、路径或排版错误，失败时回滚全部修改
+func (e *Editor) StyleTargetsFonts(page int, paths []ObjectPath, changes []TextFontChange, reflow bool) error {
+	mapping := make(map[TextFontStyle]TextFontStyle, len(changes))
+	for _, change := range changes {
+		if change.To.Font == "" {
+			return fmt.Errorf("text requires a font")
+		}
+		mapping[change.From] = change.To
+	}
+	return e.Transaction(func(e *Editor) error {
+		for _, path := range paths {
+			if path.Annotation != "" {
+				return ErrNotRichText
+			}
+			var object GraphicObject
+			var err error
+			if len(path.Children) == 0 {
+				object, err = e.Object(page, path.ID)
+			} else {
+				parent := path
+				parent.Children = path.Children[:len(path.Children)-1]
+				var members []CompositeMember
+				members, err = e.CompositeObjectsAt(page, parent, path.Children[len(path.Children)-1:])
+				if err == nil {
+					object = members[0].Object
+				}
+			}
+			if err != nil {
+				return err
+			}
+			if object.Type == "TextObject" && !reflow {
+				text := object.TextObject
+				from := TextFontStyle{Font: text.Font, Bold: text.Weight >= 700, Italic: text.Italic}
+				to, ok := mapping[from]
+				if !ok || to == from {
+					continue
+				}
+				if to.Bold == from.Bold && to.Italic == from.Italic {
+					if err := e.StyleTargetsText(page, []ObjectPath{path}, TextStyle{Font: to.Font}); err != nil {
+						return err
+					}
+					continue
+				}
+			}
+			value, _, _, err := e.PrepareRichText(page, path, reflow)
+			if err != nil {
+				return err
+			}
+			changed := false
+			for index := range value.Runs {
+				format := &value.Runs[index].Format
+				from := TextFontStyle{Font: format.Font, Bold: format.Bold, Italic: format.Italic}
+				if to, ok := mapping[from]; ok && to != from {
+					format.Font, format.Bold, format.Italic = to.Font, to.Bold, to.Italic
+					changed = true
+				}
+			}
+			if !changed {
+				continue
+			}
+			if reflow {
+				err = e.ReflowRichText(page, path, value)
+			} else {
+				err = e.UpdateTargetRichText(page, path, value, 0, 0)
+			}
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
+// ReflowTargetsText 显式重排跨容器文字并应用格式增量，保留对象位置及组合结构
+// 入参: page 页面索引, paths 完整文字路径, patch 格式增量
+// 返回: error 路径、格式或排版错误
+func (e *Editor) ReflowTargetsText(page int, paths []ObjectPath, patch TextFormatPatch) error {
+	return e.formatTargetsText(page, paths, patch, true)
+}
+
+// LayoutTargetsText 原子修改跨容器文字的段落增量，保留各自宽度、变换及未指定的样式
+// 定位文字显式重排为富文本，任一对象失败时回滚全部修改及新增资源
+// 入参: page 页面索引, paths 完整文字路径, patch 段落增量, wrap 折行选项，nil保持原值
+// 返回: error 路径、段落或排版错误
+func (e *Editor) LayoutTargetsText(page int, paths []ObjectPath, patch RichTextParagraph, wrap *bool) error {
+	if patch == (RichTextParagraph{}) && wrap == nil {
+		return nil
+	}
+	apply := func(path ObjectPath) error {
+		value, _, _, err := e.PrepareRichText(page, path, true)
+		if err != nil {
+			return err
+		}
+		if wrap != nil {
+			value.Layout.Wrap = *wrap
+		}
+		if err := value.FormatParagraphs(0, value.Len(), patch); err != nil {
+			return err
+		}
+		if strings.HasSuffix(value.Text(), "\n") {
+			if err := value.FormatParagraphs(value.Len(), value.Len(), patch); err != nil {
+				return err
+			}
+		}
+		return e.ReflowRichText(page, path, value)
+	}
+	return e.editTargets(paths, func(ids, annotations []string) error {
+		if len(annotations) != 0 {
+			return ErrNotRichText
+		}
+		for _, id := range ids {
+			if err := apply(ObjectPath{ID: id}); err != nil {
+				return err
+			}
+		}
+		return nil
+	}, func(path ObjectPath, indexes []int) error {
+		for _, index := range indexes {
+			target := path
+			target.Children = append(slices.Clone(path.Children), index)
+			if err := apply(target); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
+// formatTargetsText 统一文字选区格式事务，普通字体和颜色修改沿用定位保留路径
+// 入参: page 页面索引, paths 完整路径, patch 格式增量, reflow 显式重排
+// 返回: error 校验或编辑错误
+func (e *Editor) formatTargetsText(page int, paths []ObjectPath, patch TextFormatPatch, reflow bool) error {
+	style := TextStyle{Reflow: reflow}
+	if patch.Font != nil {
+		if strings.TrimSpace(*patch.Font) == "" {
+			return fmt.Errorf("text requires a font")
+		}
+		style.Font = *patch.Font
+	}
+	if patch.Size != nil {
+		if !finite(*patch.Size) || *patch.Size <= 0 {
+			return fmt.Errorf("invalid text size")
+		}
+		style.Size = *patch.Size
+	}
+	if patch.Color != nil {
+		style.Color = *patch.Color
+		if style.Color == "" {
+			style.Color = "0 0 0"
+		}
+	}
+	decorated := patch.Bold != nil || patch.Italic != nil || patch.Underline != nil || patch.Strikeout != nil || patch.Shadow != nil || patch.Background != nil
+	return e.editTargets(paths, func(ids, annotations []string) error {
+		if len(annotations) != 0 {
+			return fmt.Errorf("annotation is not a text object")
+		}
+		objects, _, err := e.selectedObjects(page, ids)
+		if err != nil {
+			return err
+		}
+		var plain []string
+		for _, object := range objects {
+			id := editorObjectID(object)
+			if object.Type == "TextObject" && !decorated {
+				plain = append(plain, id)
+				continue
+			}
+			value, _, _, err := e.PrepareRichText(page, ObjectPath{ID: id}, reflow)
+			if err != nil {
+				return err
+			}
+			if err := value.ApplyFormat(0, value.Len(), patch); err != nil {
+				return err
+			}
+			if err := e.updateRichTextFrame(page, id, value, 0, 0, reflow); err != nil {
+				return err
+			}
+		}
+		if len(plain) != 0 {
+			return e.StyleText(page, plain, style)
+		}
+		return nil
+	}, func(path ObjectPath, indexes []int) error {
+		members, err := e.CompositeObjectsAt(page, path, indexes)
+		if err != nil {
+			return err
+		}
+		var plain []int
+		for i, member := range members {
+			if member.Object.Type == "TextObject" && !decorated {
+				plain = append(plain, indexes[i])
+				continue
+			}
+			if err := e.formatCompositeText(page, path, indexes[i], patch, reflow); err != nil {
+				return err
+			}
+		}
+		if len(plain) != 0 {
+			return e.StyleCompositeText(page, path, plain, style)
+		}
+		return nil
+	})
+}
+
+// PrepareTargets 将选区及其关联资源复制为独立单页编辑器，来源关闭后仍可使用
+// 不修改来源、历史或组合结构，加密来源须显式允许明文导出
+// 不包含页面模板和签名，指向其他页面的跳转随单页导出移除
+// 入参: ctx 取消上下文, page 来源页, paths 完整对象路径, allowDecrypted 允许明文导出
+// 返回: *Editor 独立选区，可直接导出或继续编辑, error 路径或资源错误
+func (e *Editor) PrepareTargets(ctx context.Context, page int, paths []ObjectPath, allowDecrypted bool) (*Editor, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
+	if e.encryption != nil && !allowDecrypted {
+		return nil, ErrEncryptionPolicyRequired
+	}
+	if len(paths) == 0 {
+		return nil, fmt.Errorf("no objects selected")
+	}
+	snapshot := e.transactionSnapshot()
+	snapshot.history, snapshot.historyIndex, snapshot.historyLimit = nil, 0, 0
+	snapshot.transactionChanges = nil
+	for id, origin := range snapshot.origins {
+		if origin != nil && origin.editor == e {
+			copy := *origin
+			copy.editor = &snapshot
+			snapshot.origins[id] = &copy
+		}
+	}
+	selection, err := snapshot.CaptureTargets(page, paths)
+	if err != nil {
+		return nil, err
+	}
+	content, err := snapshot.page(page)
+	if err != nil {
+		return nil, err
+	}
+	objects, annotations, err := snapshot.PasteSelection(page, selection, 0, 0)
+	if err != nil {
+		return nil, err
+	}
+	box, err := creationBox(content.Area.PhysicalBox)
+	if err != nil {
+		return nil, err
+	}
+	packet := NewEditor()
+	packet.SetRenderBackends(e.backends)
+	packet.SetResources(e.runtimeResources)
+	packet.SetFontDirs(e.fontDirs...)
+	packet.SetFontFS(e.fontFS...)
+	packet.OnWriteProgress = e.OnWriteProgress
+	if _, err := packet.AddPage(box.W, box.H); err != nil {
+		return nil, err
+	}
+	packet.pages[0].Area = content.Area
+	if _, _, err := packet.importSelection(ctx, &snapshot, page, objects, annotations, 0, ObjectImportOptions{AllowDecrypted: true, OnProgress: e.OnWriteProgress}, false); err != nil {
+		return nil, err
+	}
+	packet.history, packet.historyIndex = nil, 0
+	return packet, nil
+}
+
+// WriteTargetsTo 将选区及关联资源写成独立单页OFD，不修改来源与历史
+// 入参: ctx 取消上下文, writer 输出流, page 来源页, paths 完整对象路径, allowDecrypted 允许明文导出
+// 返回: int64 写入字节数, error 路径、资源或写入错误
+func (e *Editor) WriteTargetsTo(ctx context.Context, writer io.Writer, page int, paths []ObjectPath, allowDecrypted bool) (int64, error) {
+	packet, err := e.PrepareTargets(ctx, page, paths, allowDecrypted)
+	if err != nil {
+		return 0, err
+	}
+	return packet.WriteToWithOptions(ctx, writer, WriteOptions{})
 }
@@ -20,6 +20,7 @@ import (
 	"encoding/xml"
 	"fmt"
 	"maps"
+	"path"
 	"slices"
 	"strings"
 )
@@ -337,7 +338,7 @@ func editorStructureIndexContext(ctx context.Context, base *editorSource, parts
 	if base.document.CustomTags.Path == "" {
 		container := root.child("CustomTags")
 		if container == nil || len(container.children) == 0 {
-			name = packageAvailableName(base.reader, nil, base.reader.RootDir+"/CustomTags.xml")
+			name = packageAvailableName(base.reader, nil, path.Join(base.reader.RootDir, "CustomTags.xml"))
 			data, err = root.containerXML("CustomTags", nil, nil)
 			if err == nil {
 				root, err = parseEditorXMLContext(ctx, data)
@@ -15,6 +15,9 @@
 package ofdgo

 import (
+	"crypto/sha256"
+	"encoding/json"
+	"encoding/xml"
 	"errors"
 	"fmt"
 	"image/color"
@@ -34,8 +37,8 @@ type MissingGlyphError struct {

 // TextLayout 本地横向段落选项
 // Shape显式启用FontShaper，保存为标准TextCode和CGTransform，不改变阅读时的原文定位
-// Shaping提供可比较的塑形选项，非零值也会启用塑形，并随会话内文字编辑保留
-// Wrap按CTM变换前的边界宽度折行，Align为left、center、right或justify
+// Shaping提供可比较的塑形选项，非零值也会启用塑形，并随排版元数据保存
+// Wrap按CTM变换前的边界宽度折行，Align为left、center、right、justify或distributed
 // LineHeight为毫米单位的基线间距，0使用字体度量；LetterSpacing为字素间的附加毫米间距，可为负
 // LeftIndent和RightIndent为左右缩进，FirstLineIndent为每段首行相对左缩进的偏移，单位为毫米
 // AutoBidi自动识别双向文字并启用塑形，零值保持显式换行和左对齐
@@ -63,10 +66,50 @@ type TextStyle struct {
 	Reflow bool
 }

-// textLayout 保存编辑中的原文与选项，不写入OFD，也不参与渲染
+// textLayout 保存可恢复的原文与排版选项，不参与阅读渲染
 type textLayout struct {
-	value   string
-	options TextLayout
+	value     string
+	options   TextLayout
+	autoWidth bool
+}
+
+// textNamespace 标识普通文字编辑语义的命名空间，版本仅随不兼容的语义变更升级
+const textNamespace = "https://ofdgo.aite.me/ns/text/1"
+
+// textMetadataAttribute 判断无资源引用的普通文字编辑元数据属性
+// 入参: node 所属节点, attr 属性
+// 返回: bool 是否为本库普通文字元数据
+func textMetadataAttribute(node xml.Name, attr xml.Attr) bool {
+	return classifyOFDNamespace(node.Space) != ofdXMLUnknown && (node.Local == "TextObject" || node.Local == "Text") && attr.Name.Space == textNamespace && attr.Name.Local == "Text"
+}
+
+// textMetadata 保存原文、选项与标准定位摘要
+type textMetadata struct {
+	Text      string     `json:"text"`
+	Layout    TextLayout `json:"layout"`
+	AutoWidth bool       `json:"autoWidth"`
+	Digest    string     `json:"digest"`
+}
+
+// textDigest 计算与字体编号无关的文字定位摘要
+// 返回: string 摘要
+func (obj TextObject) textDigest() string {
+	codes := append([]TextCode(nil), obj.TextCode...)
+	for i := range codes {
+		codes[i].Value = string(textCodeRunes(codes[i].Value))
+	}
+	data, _ := json.Marshal(codes)
+	return fmt.Sprintf("%x", sha256.Sum256(data))
+}
+
+// textMetadata 编码普通文字的排版语义，与标准定位一起保存
+// 返回: string 元数据, error 编码错误
+func (obj TextObject) textMetadata() (string, error) {
+	if obj.layout == nil {
+		return "", nil
+	}
+	data, err := json.Marshal(textMetadata{Text: obj.layout.value, Layout: obj.layout.options, AutoWidth: obj.layout.autoWidth, Digest: obj.textDigest()})
+	return string(data), err
 }

 // Error 返回缺失字符的Unicode码点
@@ -106,7 +149,7 @@ func (e *Editor) StyleText(page int, ids []string, style TextStyle) (err error)
 	return e.UpdateObjects(page, updates)
 }

-// UpdateTextContent 修改文字内容及样式，原文保留定位，已知段落按会话选项重排
+// UpdateTextContent 修改文字内容及样式，原文保留定位，已知段落按排版选项重排
 // 原文等长替换保留全部位移，单个TextCode内增删仅调整局部步进，跨定位段增删需显式重排
 // 入参: page 页面索引, id 文字对象标识, value 新内容, style 样式增量
 // 返回: error 错误信息
@@ -187,7 +230,7 @@ func (e *Editor) UpdateTextContent(page int, id, value string, style TextStyle)

 // RewriteText 保留原文的字形定位，不修改对象样式或文档
 // 等长替换保留各字原位；单段增删保留前缀和后缀步进，新增字符沿用局部字距
-// 方向、缩放和修饰原样保留；复杂布局仅支持等长替换，合并字形需显式重排
+// 方向、缩放和修饰原样保留；单段纵排沿用现有纵向步进，其他复杂布局仅支持等长替换，合并字形需显式重排
 // 首段缺失坐标仅在临时校验中恢复，不改写源坐标
 // 入参: obj 原文字对象, value 新内容
 // 返回: error 错误信息
@@ -210,7 +253,8 @@ func (e *Editor) RewriteText(obj *TextObject, value string) error {
 		return err
 	}
 	old, next := []rune(obj.Text()), []rune(value)
-	complex := obj.ReadDirection != 0 || obj.CharDirection != 0 || len(obj.CGTransform) != 0 || obj.VScale != 0 || obj.Decoration != ""
+	vertical := (obj.ReadDirection == 90 || obj.ReadDirection == 270) && obj.CharDirection == 0 && len(obj.TextCode) == 1 && obj.TextCode[0].DeltaY != ""
+	complex := obj.ReadDirection != 0 && !vertical || obj.CharDirection != 0 || len(obj.CGTransform) != 0 || obj.VScale != 0 || obj.Decoration != ""
 	if complex && len(old) != len(next) {
 		return &EditError{Code: EditLayoutRequired, Err: fmt.Errorf("changing positioned text length requires explicit layout")}
 	}
@@ -279,7 +323,12 @@ func (e *Editor) RewriteText(obj *TextObject, value string) error {
 				if obj.HScale != 0 {
 					unit *= obj.HScale
 				}
-				advance := func(char rune) float64 { return float64(sfnt.GlyphAdvance(sfnt.GlyphIndex(char))) * unit }
+				advance := func(char rune) float64 {
+					if vertical {
+						return 0
+					}
+					return float64(sfnt.GlyphAdvance(sfnt.GlyphIndex(char))) * unit
+				}
 				if codes[i].DeltaX != "" {
 					codes[i].DeltaX = rewriteTextDeltas(codes[i].DeltaX, runes, replacement, from, to, advance)
 				}
@@ -627,9 +676,9 @@ func breakTextLines(runes []rune, advances []float64, width float64, wrap bool,
 }

 // alignTextLine 将段落对齐转换为标准X和DeltaX，两端对齐保留段落末行左对齐
-// 入参: runes 行内字符, advances 含字距的字符步进, width 本地排版宽度, alignment 对齐方式, justify 是否允许本行两端对齐, spacing 附加字距
+// 入参: runes 行内字符, advances 含字距的字符步进, width 本地排版宽度, alignment 对齐方式, justify 是否允许本行两端对齐, spacing 附加字距, clusters 可选塑形簇起点
 // 返回: float64 行首X坐标, string 字符间的DeltaX序列
-func alignTextLine(runes []rune, advances []float64, width float64, alignment string, justify bool, spacing float64) (float64, string) {
+func alignTextLine(runes []rune, advances []float64, width float64, alignment string, justify bool, spacing float64, clusters map[int]bool) (float64, string) {
 	end := len(runes)
 	for end > 0 && runes[end-1] == ' ' {
 		end--
@@ -659,6 +708,17 @@ func alignTextLine(runes []rune, advances []float64, width float64, alignment st
 			}
 		}
 	}
+	if alignment == "distributed" && extra > 0 {
+		var seg segmenter.Segmenter
+		seg.Init(runes[:end])
+		for it := seg.GraphemeIterator(); it.Next(); {
+			cluster := it.Grapheme()
+			at := cluster.Offset + len(cluster.Text)
+			if at < end && (clusters == nil || clusters[at]) {
+				gaps[at-1] = true
+			}
+		}
+	}
 	deltas := make([]string, max(0, len(runes)-1))
 	for i := range deltas {
 		advance := advances[i]
@@ -817,7 +817,7 @@ func (e *Editor) reflowTextSelection(page int, selection TextSelection, edit Tex
 		}
 		return e.putRichTextMetadata(page, first.ID, meta, -1)
 	}
-	return e.editCompositeObjects(page, *selection.Root, selection.Indexes, func(_ *Renderer, nodes []*editorCompositeNode, _ []CompositeMember) error {
+	if err := e.editCompositeObjects(page, *selection.Root, selection.Indexes, func(_ *Renderer, nodes []*editorCompositeNode, _ []CompositeMember) error {
 		for i, node := range nodes {
 			if selection.Indexes[i] != first.Index {
 				node.owner.patches = append(node.owner.patches, editorXMLPatch{node.span.start, node.span.end, nil})
@@ -838,5 +838,18 @@ func (e *Editor) reflowTextSelection(page int, selection TextSelection, edit Tex
 			node.setState(editorCompositeState{})
 		}
 		return nil
-	})
+	}); err != nil {
+		return err
+	}
+	index := first.Index
+	for _, part := range preview.analysis.Parts[1:] {
+		if part.Index < first.Index {
+			index--
+		}
+	}
+	member, err := e.CompositeObject(page, *selection.Root, index)
+	if err != nil {
+		return err
+	}
+	return e.putCompositeRichTextMetadata(page, member.Object, meta, -1)
 }
@@ -397,6 +397,9 @@ func editorXMLAttributes(node *editorXML, allowed string) bool {
 		if attr.Name.Space == "xmlns" || attr.Name.Local == "xmlns" && attr.Name.Space == "" {
 			continue
 		}
+		if textMetadataAttribute(node.name, attr) {
+			continue
+		}
 		if attr.Name.Space != "" || !slices.Contains(strings.Fields(allowed), attr.Name.Local) {
 			return false
 		}
@@ -569,6 +572,15 @@ func editorXMLMergeNamespace(data []byte, node *editorXML, oldXML, newXML []byte
 		return nil, err
 	}
 	changes := make(map[string]string)
+	textValue := func(n *editorXML) string {
+		for _, attr := range n.attrs {
+			if attr.Name.Space == textNamespace && attr.Name.Local == "Text" {
+				return attr.Value
+			}
+		}
+		return ""
+	}
+	textChanged := textValue(oldNode) != textValue(newNode)
 	if legacyClip {
 		changes["TransFlag"] = ""
 	}
@@ -578,7 +590,7 @@ func editorXMLMergeNamespace(data []byte, node *editorXML, oldXML, newXML []byte
 		}
 	}
 	contentChanged := !bytes.Equal(oldXML[oldNode.open:oldNode.close], newXML[newNode.open:newNode.close])
-	if len(changes) == 0 && !contentChanged && namespace == node.name.Space {
+	if len(changes) == 0 && !textChanged && !contentChanged && namespace == node.name.Space {
 		return bytes.Clone(data[node.start:node.end]), nil
 	}
 	d := xml.NewDecoder(bytes.NewReader(data[node.start:node.open]))
@@ -587,8 +599,29 @@ func editorXMLMergeNamespace(data []byte, node *editorXML, oldXML, newXML []byte
 		return nil, err
 	}
 	start := token.(xml.StartElement)
+	if textChanged {
+		value, found := textValue(newNode), false
+		attrs := start.Attr[:0]
+		for i, attr := range start.Attr {
+			resolved := node.attrs[i]
+			if resolved.Name.Space == textNamespace && resolved.Name.Local == "Text" {
+				found = true
+				if value != "" {
+					attr.Value = value
+					attrs = append(attrs, attr)
+				}
+				continue
+			}
+			attrs = append(attrs, attr)
+		}
+		start.Attr = attrs
+		if !found && value != "" {
+			prefix := editorXMLNamespacePrefix(node, "ofdgo")
+			start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Space: "xmlns", Local: prefix}, Value: textNamespace}, xml.Attr{Name: xml.Name{Space: prefix, Local: "Text"}, Value: value})
+		}
+	}
 	if legacyClip || namespace != node.name.Space {
-		start.Name.Space = editorXMLNamespacePrefix(node)
+		start.Name.Space = editorXMLNamespacePrefix(node, "ofd")
 		start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Space: "xmlns", Local: start.Name.Space}, Value: namespace})
 	}
 	var result bytes.Buffer
@@ -17,14 +17,112 @@ package ofdgo
 import (
 	"fmt"
 	"path"
+	"sort"
 	"unicode/utf8"

 	basefont "github.com/xiaoqidun/ofdgo/internal/base/font"
 )

 // FontFace 字体文件中的字体名称与零起始索引，不依赖文件名
+// Family和Style保留排版族，MenuFamily和MenuStyle提供兼容四款式的菜单名称
+// FamilyKey用于同来源内的族关联，Bold和Italic表示字体固有样式
 type FontFace = basefont.Face

+// FontFamilyIndexes 按兼容字体族、版本及来源分组，同款式重复时整族保留独立入口
+// 入参: faces 字体信息, sources 每项的来源标识，空列表表示同一来源
+// 返回: [][]int 按首次出现顺序分组的候选索引
+func FontFamilyIndexes(faces []FontFace, sources []string) [][]int {
+	groups := make([][]int, 0, len(faces))
+	keys := make([]string, len(faces))
+	styles := make(map[string]map[[2]bool]bool)
+	ambiguous := make(map[string]bool)
+	for index, face := range faces {
+		key := face.FamilyKey
+		if len(sources) > index {
+			key += "\x00" + sources[index]
+		}
+		keys[index] = key
+		if styles[key] == nil {
+			styles[key] = make(map[[2]bool]bool)
+		}
+		style := [2]bool{face.Bold, face.Italic}
+		ambiguous[key] = ambiguous[key] || styles[key][style]
+		styles[key][style] = true
+	}
+	indexes := make(map[string]int)
+	for index, face := range faces {
+		key := keys[index]
+		if face.FamilyKey == "" || ambiguous[key] {
+			groups = append(groups, []int{index})
+			continue
+		}
+		group, exists := indexes[key]
+		if !exists {
+			group, indexes[key] = len(groups), len(groups)
+			groups = append(groups, nil)
+		}
+		groups[group] = append(groups[group], index)
+	}
+	return groups
+}
+
+// FontStyleIndex 选择同族候选中最接近的真实款式，允许补充合成样式但不抵消固有样式
+// 入参: faces 同来源同族候选, bold 粗体, italic 斜体
+// 返回: int 候选索引，无可用款式时为-1
+func FontStyleIndex(faces []FontFace, bold, italic bool) int {
+	selected, best := -1, -1
+	for index, face := range faces {
+		if face.Bold && !bold || face.Italic && !italic {
+			continue
+		}
+		score := 0
+		if face.Bold == bold {
+			score++
+		}
+		if face.Italic == italic {
+			score++
+		}
+		if score > best {
+			selected, best = index, score
+		}
+	}
+	return selected
+}
+
+// FontPreferenceOrder 按字体族偏好排列候选索引，同族优先常规样式，其余保持原顺序
+// 入参: faces 候选字体, families 按优先级排列的字体族别名组
+// 返回: []int 候选字体的零起始索引，不修改输入列表
+func FontPreferenceOrder(faces []FontFace, families [][]string) []int {
+	priorities := make(map[string]int)
+	for priority, names := range families {
+		for _, name := range names {
+			key := FontNormalizeName(name)
+			if _, exists := priorities[key]; key != "" && !exists {
+				priorities[key] = priority
+			}
+		}
+	}
+	order, ranks := make([]int, len(faces)), make([]int, len(faces))
+	for i, face := range faces {
+		order[i], ranks[i] = i, len(families)*2
+		names := append([]string{face.Family, face.FullName, face.PostScriptName}, face.Names...)
+		for _, name := range names {
+			if priority, exists := priorities[FontNormalizeName(name)]; exists && priority*2 < ranks[i] {
+				ranks[i] = priority * 2
+			}
+		}
+		if ranks[i] < len(families)*2 {
+			switch FontNormalizeName(face.Style) {
+			case "", "regular", "normal", "roman", "常规", "正常", "标准":
+			default:
+				ranks[i]++
+			}
+		}
+	}
+	sort.SliceStable(order, func(i, j int) bool { return ranks[order[i]] < ranks[order[j]] })
+	return order
+}
+
 // FixFontDataAggressive 激进修复字体数据
 // 尝试修复缺失表(OS/2, cmap等)的TrueType字体或包装CFF裸数据
 // 对显式字形映射补充私有字符cmap，便于按glyph id渲染
@@ -269,23 +269,35 @@ func (r *Renderer) fontDigest(data []byte) [32]byte {

 // resetFontCache 重置字体解析及字形缓存，保留图片和非字体后端状态
 func (r *Renderer) resetFontCache() {
-	r.fontSourcesCache = newFontSourceCache()
+	if r.fontSourcesCache != nil {
+		r.fontSourcesCache.collections.clear()
+	}
+	r.fontSourcesCache = newFontSourceCache(r.Reader.resources)
 	r.resetFontBackendCache()
 }

 // resetFontBackendCache 清理后端字体对象，保留字体文件和图片缓存
 func (r *Renderer) resetFontBackendCache() {
+	r.fontDigests.clear()
+	r.fontPreparations.clear()
+	r.fontMetrics.clear()
+	r.glyphOutlines.clear()
+	for _, state := range r.sharedBackendStates {
+		if cache, ok := state.(interface{ clear() }); ok {
+			cache.clear()
+		}
+	}
 	r.sharedBackendStates = make(map[any]any)
 	r.preparedFonts = make(map[string]*PreparedFont)
-	r.fontDigests = &renderCache[fontDataKey, [32]byte]{limit: 4 << 20}
-	r.fontPreparations = &renderCache[[32]byte, PreparedFont]{limit: 16 << 20}
+	r.fontDigests = resourceCache[fontDataKey, [32]byte](r.Reader.resources, 4<<20)
+	r.fontPreparations = resourceCache[[32]byte, PreparedFont](r.Reader.resources, 16<<20)
 	r.resolvedFonts = make(map[resolvedFontKey]resolvedFontResult)
 	if r.fontSourcesCache != nil {
 		r.fontSourcesCache.fallback = ResolvedFont{}
 		r.fontSourcesCache.fallbackRead = false
 	}
-	r.fontMetrics = &renderCache[[32]byte, FontMetrics]{limit: 32 << 20}
-	r.glyphOutlines = &renderCache[glyphOutlineKey, GeometryPath]{limit: 16 << 20}
+	r.fontMetrics = resourceCache[[32]byte, FontMetrics](r.Reader.resources, 32<<20)
+	r.glyphOutlines = resourceCache[glyphOutlineKey, GeometryPath](r.Reader.resources, 16<<20)
 	for _, state := range r.backendStates {
 		if fonts, ok := state.(interface{ resetFonts() }); ok {
 			fonts.resetFonts()
@@ -107,6 +107,46 @@ func (r *Reader) FontData(id string) ([]byte, error) {
 	return r.fontData(id, false)
 }

+// FontFace 读取指定内嵌资源的本地化字体信息，集合按资源声明选取，不依赖系统字体
+// 入参: id 字体资源标识, platform 名称表平台标识, language 名称表语言标识
+// 返回: *FontFace 独立字体信息, error 资源或解析错误
+func (r *Reader) FontFace(id string, platform, language uint16) (*FontFace, error) {
+	if r.fontDefinition(id) == nil {
+		if _, err := r.Fonts(); err != nil {
+			return nil, err
+		}
+	}
+	font := r.fontDefinition(id)
+	if font == nil || font.FontFile == "" {
+		return nil, fmt.Errorf("embedded font %q not found", id)
+	}
+	name := r.ResPath(font.FontFile)
+	key := fmt.Sprintf("%s\x00%d:%d", name, platform, language)
+	faces, ok := r.fontFaces[key]
+	if !ok {
+		data, err := r.readFileView(name)
+		if err != nil {
+			return nil, err
+		}
+		values, err := (FontFile{Data: data}).LocalizedFaces(platform, language)
+		if err != nil {
+			return nil, err
+		}
+		faces = make([]*FontFace, len(values))
+		for index := range values {
+			faces[index] = &values[index]
+		}
+		r.fontFaces[key] = faces
+	}
+	names := make([][]string, len(faces))
+	for index, face := range faces {
+		names[index] = face.Names
+	}
+	face := *faces[basefont.NameIndex(names, []string{font.FontName, font.FamilyName}, font.Bold, font.Italic)]
+	face.Names = slices.Clone(face.Names)
+	return &face, nil
+}
+
 // fontData 按调用方所有权读取内嵌字体，集合字体始终独立提取
 // 入参: id 字体资源标识, readonly 是否允许借用只读资源
 // 返回: []byte 字体数据, error 资源或集合错误
@@ -251,7 +291,7 @@ func (r *Reader) embeddedFontFace(of Font) (*FontFace, error) {
 				faces = make([]*FontFace, count)
 				for index := range faces {
 					if tables, err := basefont.FileTables(data, index); err == nil {
-						info := basefont.FaceInfo(tables["name"], index)
+						info := basefont.TableFaceInfo(tables, index, 0xffff, 0xffff)
 						faces[index] = &info
 					}
 				}
@@ -79,15 +79,16 @@ type fontSourceData struct {
 }

 // newFontSourceCache 创建独立字体来源缓存
+// 入参: resources 共享资源策略
 // 返回: *fontSourceCache 字体来源缓存
-func newFontSourceCache() *fontSourceCache {
-	return &fontSourceCache{candidates: make(map[string][]fontSource), directories: make(map[string][]basefont.FileCandidate), filesystems: make(map[int][]basefont.FileCandidate), data: make(map[fontSourceKey]fontSourceData), collections: &renderCache[fontSourceKey, []byte]{limit: 32 << 20}}
+func newFontSourceCache(resources *Resources) *fontSourceCache {
+	return &fontSourceCache{candidates: make(map[string][]fontSource), directories: make(map[string][]basefont.FileCandidate), filesystems: make(map[int][]basefont.FileCandidate), data: make(map[fontSourceKey]fontSourceData), collections: resourceCache[fontSourceKey, []byte](resources, 32<<20)}
 }

 // child 复用相同来源的文件索引与数据，匹配和回退状态保持独立
 // 返回: *fontSourceCache 独立文档缓存
 func (c *fontSourceCache) child() *fontSourceCache {
-	cache := newFontSourceCache()
+	cache := newFontSourceCache(nil)
 	cache.directories, cache.filesystems, cache.data = c.directories, c.filesystems, c.data
 	cache.collections = c.collections
 	return cache
@@ -320,16 +320,13 @@ func (r *Renderer) cachedImageResource(resPath string) (image.Image, error) {
 		}
 	}
 	resPath = cleanPackagePath(r.Reader.ResPath(resPath))
-	img, ok := r.imageCache.get(resPath)
-	if !ok {
-		var err error
-		img, err = r.readImageResource(resPath)
+	return r.imageCache.load(r.pageContext, resPath, func() (image.Image, int, error) {
+		img, err := r.readImageResource(resPath)
 		if err != nil {
-			return nil, err
+			return nil, 0, err
 		}
-		r.imageCache.put(resPath, img, baseimage.StorageCost(img, r.imageCache.limit))
-	}
-	return img, nil
+		return img, baseimage.StorageCost(img, r.imageCache.limit), nil
+	})
 }

 // decodeImageResource 读取或复用图片资源，按输出需要解码像素
@@ -49,6 +49,8 @@ type DocInfo struct {
 	Abstract       string       `xml:"Abstract"`
 	CreationDate   string       `xml:"CreationDate"`
 	ModDate        string       `xml:"ModDate"`
+	DocUsage       string       `xml:"DocUsage"`
+	Cover          string       `xml:"Cover"`
 	Keywords       Keywords     `xml:"Keywords,omitempty"`
 	Creator        string       `xml:"Creator"`
 	CreatorVersion string       `xml:"CreatorVersion"`
@@ -133,6 +135,10 @@ func (info *DocInfo) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error
 			target = &info.CreationDate
 		case "ModDate":
 			target = &info.ModDate
+		case "DocUsage":
+			target = &info.DocUsage
+		case "Cover":
+			target = &info.Cover
 		case "Keywords":
 			target = &info.Keywords
 		case "Creator":
@@ -63,7 +63,7 @@ type GraphicObject struct {
 	CompositeGraphicUnit CompositeGraphicUnit
 	origin               *editorObjectOrigin
 	state                editorCompositeState
-	richText             *richTextMetadata
+	richText             *richTextSnapshot
 }

 // Clips 相对于对象外接矩形的裁剪集合
@@ -15,9 +15,11 @@
 package ofdgo

 import (
+	"bytes"
 	"context"
 	"fmt"
 	"io"
+	"maps"
 	"slices"
 	"sort"

@@ -33,7 +35,7 @@ var ErrPDFPassword = pdfgo.ErrPassword

 // PDFImportOptions 指定PDF转换的密码、运行时后端、进度通知与检查策略
 // Password默认使用PDF安全处理器编码，PasswordUTF8启用UTF-8输入及标准密码准备，空值尝试空密码
-// Strict禁止恢复缺失资源或丢失内容语义，默认在报告中记录警告
+// Strict禁止日期兼容、恢复缺失资源或丢失内容语义，默认在报告中记录警告
 // RendererOptions复用渲染器字体来源和后端配置，Backends优先于其中的后端设置
 // RasterDPI指定局部合成与三维绘制精度，0沿用渲染器DPI，默认300dpi，Strict禁用局部合成
 // OnProgress按open、pages、convert及write.*阶段报告进度，total为0表示总量未知
@@ -41,7 +43,9 @@ var ErrPDFPassword = pdfgo.ErrPassword
 // ResolveReference可提供已解密的引用页面，目标阅读器由调用方维护
 // Halftones提供只读设备命名网屏，所属阅读器由调用方维护，连续色调输出不网屏化
 // Compression配置转换输出，有损模式按图片实际尺寸降采样，原始及无损模式保持完整采样
+// Resources用于导入、局部合成与返回编辑器的共享资源预算
 type PDFImportOptions struct {
+	Resources        *Resources
 	Password         []byte
 	PasswordUTF8     bool
 	Backends         *RenderBackends
@@ -66,8 +70,28 @@ type PDFImportReport struct {
 	Warnings     []pdfgo.Diagnostic
 }

+// PDFImport 按页转换PDF，实例需串行使用，输入源由调用方持有至Close
+// 页面阅读快照独立于后续转换，Finish完成全局结构后交付独立编辑文档
+// 转换失败后可用Reset重建，输入及回调在会话存续期间须保持有效
+type PDFImport struct {
+	input    *Input
+	importer *pdfImporter
+	options  PDFImportOptions
+	pages    []PageContent
+	ready    []bool
+	err      error
+	finished bool
+}
+
+// pdfImportInput 将输入读取绑定到当前转换上下文
+type pdfImportInput struct {
+	input    *Input
+	importer *pdfImporter
+}
+
 // pdfImporter 保存单次转换的对象与资源状态
 type pdfImporter struct {
+	resources          *Resources
 	ctx                context.Context
 	reader             *pdfgo.Reader
 	editor             *Editor
@@ -78,6 +102,7 @@ type pdfImporter struct {
 	pageActionPage     int
 	fontIDs            map[*pdfgo.Font]string
 	fonts              map[*pdfgo.Font]*pdfImportedFont
+	fontPrograms       map[pdfFontProgramKey]*pdfImportedFont
 	symbolFonts        map[*pdfgo.Font]*pdfImportedFont
 	fontWarnings       map[string]bool
 	clipTexts          map[*pdfgo.TextClip][]TextObject
@@ -207,19 +232,36 @@ func (o pdfObjectOrigin) merge(other pdfObjectOrigin) pdfObjectOrigin {
 // 入参: ctx 取消上下文, input 输入源, options 转换选项
 // 返回: *Editor 编辑文档, PDFImportReport 转换统计, error 错误信息
 func ImportPDF(ctx context.Context, input *Input, options PDFImportOptions) (*Editor, PDFImportReport, error) {
+	pending, err := NewPDFImport(ctx, input, options)
+	if err != nil {
+		return nil, PDFImportReport{}, err
+	}
+	defer pending.Close()
+	return pending.Finish(ctx)
+}
+
+// NewPDFImport 建立PDF页面索引和文档信息，不转换页面图元
+// 内部复制输入密码供Reset使用，Close时清除；其他选项引用需保持有效
+// 入参: ctx 取消上下文, input 调用方持有的输入源, options 转换选项
+// 返回: *PDFImport 增量转换会话, error 读取错误
+func NewPDFImport(ctx context.Context, input *Input, options PDFImportOptions) (*PDFImport, error) {
+	if options.Resources == nil {
+		options.Resources, _ = NewResources(ResourceOptions{})
+	}
+	ctx = options.Resources.context(ctx)
 	if input == nil {
-		return nil, PDFImportReport{}, fmt.Errorf("missing source")
+		return nil, fmt.Errorf("missing source")
 	}
 	if err := ctx.Err(); err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
 	if err := options.Compression.Validate(); err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
 	if !finite(options.RasterDPI) || options.RasterDPI < 0 {
-		return nil, PDFImportReport{}, fmt.Errorf("invalid PDF raster DPI")
+		return nil, fmt.Errorf("invalid PDF raster DPI")
 	}
-	renderer := NewRenderer(&Reader{}, options.RendererOptions...)
+	renderer := NewRenderer(&Reader{resources: options.Resources}, options.RendererOptions...)
 	if options.Backends != nil {
 		WithRenderBackends(*options.Backends)(renderer)
 	}
@@ -227,43 +269,70 @@ func ImportPDF(ctx context.Context, input *Input, options PDFImportOptions) (*Ed
 		renderer.DPI = options.RasterDPI
 	}
 	if !finite(renderer.DPI) || renderer.DPI <= 0 {
-		return nil, PDFImportReport{}, fmt.Errorf("invalid PDF raster DPI")
+		return nil, fmt.Errorf("invalid PDF raster DPI")
 	}
+	keep := false
+	options.Password = slices.Clone(options.Password)
+	defer func() {
+		if !keep {
+			clear(options.Password)
+		}
+	}()
 	progress := editorProgress(options.OnProgress).withContext(ctx)
 	if err := progress.report("open", 0, 0); err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
 	editor := NewEditor()
+	editor.runtimeResources = options.Resources
 	editor.SetRenderBackends(renderer.Backends())
 	editor.fontDirs, editor.fontFS = renderer.FontSources()
 	editor.fontSourcesCache = renderer.fontSourcesCache
-	importer := pdfImporter{ctx: ctx, editor: editor, renderer: renderer, rasterDPI: renderer.DPI, fontIDs: map[*pdfgo.Font]string{}, fonts: map[*pdfgo.Font]*pdfImportedFont{}, pages: map[pdfgo.Reference]*pdfgo.Page{}, pageIDs: map[pdfgo.Reference]string{}, structureBindings: &pdfStructureBindings{}}
+	importer := &pdfImporter{resources: options.Resources, ctx: ctx, editor: editor, renderer: renderer, rasterDPI: renderer.DPI, page: -1, fontIDs: map[*pdfgo.Font]string{}, fonts: map[*pdfgo.Font]*pdfImportedFont{}, pages: map[pdfgo.Reference]*pdfgo.Page{}, pageIDs: map[pdfgo.Reference]string{}, structureBindings: &pdfStructureBindings{}}
 	readOptions := pdfgo.ReaderOptions{Password: options.Password, PasswordUTF8: options.PasswordUTF8, ShapeText: importer.shapePDFText}
-	var diagnostics []pdfgo.Diagnostic
-	var readWarning func(pdfgo.Diagnostic)
 	if !options.Strict {
-		readWarning = func(diagnostic pdfgo.Diagnostic) { diagnostics = append(diagnostics, diagnostic) }
-		readOptions.Warning = func(diagnostic pdfgo.Diagnostic) { readWarning(diagnostic) }
+		importer.warning = func(warning pdfgo.Diagnostic) {
+			warning.Page = importer.page + 1
+			importer.report.Warnings = append(importer.report.Warnings, warning)
+		}
+		readOptions.Warning = importer.warning
 	}
-	reader, err := pdfgo.NewReaderWithOptions(convertReader{ctx: ctx, input: input}, input.Size(), readOptions)
+	reader, err := pdfgo.NewReaderWithOptions(&pdfImportInput{input: input, importer: importer}, input.Size(), readOptions)
 	if err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
-	defer reader.Close()
+	defer func() {
+		if !keep {
+			reader.Close()
+		}
+	}()
 	importer.reader = reader
 	if err := importer.prepareStructure(ctx); err != nil {
-		return nil, PDFImportReport{}, fmt.Errorf("import PDF structure: %w", err)
+		return nil, fmt.Errorf("import PDF structure: %w", err)
 	}
 	outputIntents, err := reader.OutputIntents()
 	if err != nil {
-		return nil, PDFImportReport{}, fmt.Errorf("import PDF output intents: %w", err)
+		return nil, fmt.Errorf("import PDF output intents: %w", err)
 	}
-	importer.report.Warnings = diagnostics
 	if len(outputIntents) != 0 {
-		if options.Strict {
-			return nil, PDFImportReport{}, &pdfgo.UnsupportedError{Feature: "PDF output intent conversion"}
+		var profile []byte
+		applicable := true
+		for _, intent := range outputIntents {
+			if intent.Subtype != "GTS_PDFA1" && intent.Subtype != "GTS_PDFX" || intent.Space == nil || len(intent.Profile) == 0 || profile != nil && !bytes.Equal(profile, intent.Profile) {
+				applicable = false
+				break
+			}
+			profile = intent.Profile
+		}
+		if applicable {
+			if err := reader.SetDeviceColorProfile(profile); err != nil {
+				return nil, fmt.Errorf("import PDF device color profile: %w", err)
+			}
+		} else {
+			if options.Strict {
+				return nil, &pdfgo.UnsupportedError{Feature: "PDF output intent conversion"}
+			}
+			importer.report.Warnings = append(importer.report.Warnings, pdfgo.Diagnostic{Message: "PDF output intents preserved as metadata; not applied to rendering"})
 		}
-		importer.report.Warnings = append(importer.report.Warnings, pdfgo.Diagnostic{Message: "PDF output intents not transferred to OFD"})
 	}
 	importer.pageIndexes = make(map[pdfgo.Reference]int)
 	importer.resolveFile = options.ResolveFile
@@ -271,17 +340,14 @@ func ImportPDF(ctx context.Context, input *Input, options PDFImportOptions) (*Ed
 	importer.halftones = options.Halftones
 	importer.compression = options.Compression
 	importer.references = &codecpdf.ReferenceCache{}
-	defer importer.references.Close()
-	importer.halftoneWarnings = make(map[*pdfgo.Halftone]bool)
-	if !options.Strict {
-		importer.warning = func(warning pdfgo.Diagnostic) {
-			warning.Page = importer.page + 1
-			importer.report.Warnings = append(importer.report.Warnings, warning)
+	defer func() {
+		if !keep {
+			importer.references.Close()
 		}
-		readWarning = importer.warning
-	}
+	}()
+	importer.halftoneWarnings = make(map[*pdfgo.Halftone]bool)
 	if err := progress.report("pages", 0, 0); err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
 	err = reader.WalkPages(ctx, func(index int, page *pdfgo.Page) error {
 		_, width, height := codecpdf.PageMatrix(page)
@@ -295,82 +361,228 @@ func ImportPDF(ctx context.Context, input *Input, options PDFImportOptions) (*Ed
 		return progress.report("pages", index+1, 0)
 	})
 	if err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
 	if len(editor.pages) != 0 {
 		importer.page = -1
-		if err := importer.documentMetadata(ctx); err != nil {
-			return nil, PDFImportReport{}, fmt.Errorf("import PDF metadata: %w", err)
+		if err := importer.documentMetadata(ctx, options.Strict); err != nil {
+			return nil, fmt.Errorf("import PDF metadata: %w", err)
 		}
 		if err := importer.documentAttachments(ctx); err != nil {
-			return nil, PDFImportReport{}, fmt.Errorf("import PDF attachments: %w", err)
+			return nil, fmt.Errorf("import PDF attachments: %w", err)
 		}
 		if err := importer.outlines(ctx); err != nil {
-			return nil, PDFImportReport{}, fmt.Errorf("import PDF outlines: %w", err)
+			return nil, fmt.Errorf("import PDF outlines: %w", err)
 		}
 		if err := importer.documentOpenActions(ctx); err != nil {
-			return nil, PDFImportReport{}, fmt.Errorf("import PDF document actions: %w", err)
+			return nil, fmt.Errorf("import PDF document actions: %w", err)
 		}
 		importer.page = 0
 	}
 	if err := progress.report("convert", 0, len(editor.pages)); err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
-	err = reader.WalkPages(ctx, func(index int, page *pdfgo.Page) error {
-		matrix, width, height := codecpdf.PageMatrix(page)
-		importer.matrix = matrix
-		importer.page = index
-		importer.rasterWarned = false
-		importer.pageBox = page.CropBox
-		importer.pageWidth = width
-		importer.pageHeight = height
-		importer.maskClips = make(map[*pdfgo.SoftMask]pdfgo.Path)
-		importer.compositeCache = nil
-		importer.compositeNodes = nil
-		importer.compositeSpace = nil
-		importer.patternCells = nil
-		importer.patternOrigins = nil
-		importer.clipTexts = make(map[*pdfgo.TextClip][]TextObject)
-		importer.textOrigins = nil
-		importer.clipPaths = nil
-		importer.annotationData = nil
-		importer.annotationBindings = nil
-		if err := importer.pageOpenActions(ctx, page); err != nil {
-			return fmt.Errorf("import PDF page %d actions: %w", index+1, err)
+	if len(editor.pages) == 0 {
+		return nil, fmt.Errorf("PDF contains no pages")
+	}
+	keep = true
+	return &PDFImport{input: input, importer: importer, options: options, pages: cloneEditorData(editor.pages), ready: make([]bool, len(editor.pages))}, nil
+}
+
+// ReadAt 读取当前操作需要的数据，不取得输入所有权
+// 入参: data 目标缓冲, offset 文件偏移
+// 返回: int 读取字节数, error 读取或取消错误
+func (r *pdfImportInput) ReadAt(data []byte, offset int64) (int, error) {
+	if err := r.importer.ctx.Err(); err != nil {
+		return 0, err
+	}
+	return r.input.ReadAt(data, offset)
+}
+
+// PageCount 返回文档页数
+// 返回: int 页面总数
+func (p *PDFImport) PageCount() int { return len(p.pages) }
+
+// Ready 返回指定页是否转换完成
+// 入参: index 页面索引，从0开始
+// 返回: bool 页面是否就绪
+func (p *PDFImport) Ready(index int) bool {
+	return index >= 0 && index < len(p.ready) && p.ready[index]
+}
+
+// SetEncryption 设置转换文档的输出加密方式，不改变PDF读取凭据
+// 入参: options 加密选项，nil取消输出加密
+// 返回: error 加密配置错误
+func (p *PDFImport) SetEncryption(options *EncryptionOptions) error {
+	if p.importer == nil {
+		return fmt.Errorf("PDF import is closed")
+	}
+	return p.importer.editor.SetEncryption(options)
+}
+
+// ConvertPage 转换指定页面，已完成的页面不重复处理
+// 入参: ctx 取消上下文, index 页面索引，从0开始
+// 返回: error 转换或取消错误
+func (p *PDFImport) ConvertPage(ctx context.Context, index int) (err error) {
+	if p.importer == nil {
+		return fmt.Errorf("PDF import is closed")
+	}
+	if p.err != nil {
+		return p.err
+	}
+	if index < 0 || index >= len(p.pages) {
+		return fmt.Errorf("invalid page index: %d", index)
+	}
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	if p.ready[index] {
+		return nil
+	}
+	defer func() {
+		if err != nil {
+			p.err = err
 		}
-		if err := importer.compositePage(nil, func(visitor pdfgo.Visitor) error { return reader.WalkPage(ctx, page, visitor) }); err != nil {
-			return fmt.Errorf("import PDF page %d: %w", index+1, err)
-		}
-		if err := importer.annotations(ctx, page, options.Strict); err != nil {
-			return fmt.Errorf("import PDF page %d: %w", index+1, err)
-		}
-		if err := importer.commitAnnotations(); err != nil {
-			return fmt.Errorf("import PDF page %d: %w", index+1, err)
-		}
-		if err := importer.commitObjects(); err != nil {
-			return fmt.Errorf("import PDF page %d: %w", index+1, err)
-		}
-		importer.report.Pages++
-		if err := progress.report("convert", index+1, len(editor.pages)); err != nil {
+	}()
+	importer := p.importer
+	importer.ctx = importer.resources.context(ctx)
+	ctx = importer.ctx
+	importer.renderer.OutputContext = ctx
+	page := importer.pageOrder[index]
+	matrix, width, height := codecpdf.PageMatrix(page)
+	importer.matrix = matrix
+	importer.page = index
+	importer.rasterWarned = false
+	importer.pageBox = page.CropBox
+	importer.pageWidth = width
+	importer.pageHeight = height
+	importer.maskClips = make(map[*pdfgo.SoftMask]pdfgo.Path)
+	importer.compositeCache = nil
+	importer.compositeNodes = nil
+	importer.compositeSpace = nil
+	importer.patternCells = nil
+	importer.patternOrigins = nil
+	importer.clipTexts = make(map[*pdfgo.TextClip][]TextObject)
+	importer.textOrigins = nil
+	importer.clipPaths = nil
+	importer.annotationData = nil
+	importer.annotationBindings = nil
+	if err := importer.pageOpenActions(ctx, page); err != nil {
+		return fmt.Errorf("import PDF page %d actions: %w", index+1, err)
+	}
+	if err := importer.compositePage(nil, func(visitor pdfgo.Visitor) error { return importer.reader.WalkPage(ctx, page, visitor) }); err != nil {
+		return fmt.Errorf("import PDF page %d: %w", index+1, err)
+	}
+	if err := importer.annotations(ctx, page, p.options.Strict); err != nil {
+		return fmt.Errorf("import PDF page %d: %w", index+1, err)
+	}
+	if err := importer.commitAnnotations(); err != nil {
+		return fmt.Errorf("import PDF page %d: %w", index+1, err)
+	}
+	if err := importer.commitObjects(); err != nil {
+		return fmt.Errorf("import PDF page %d: %w", index+1, err)
+	}
+	importer.report.Pages++
+	if err := editorProgress(p.options.OnProgress).withContext(ctx).report("convert", importer.report.Pages, len(p.pages)); err != nil {
+		return err
+	}
+	if p.options.Progress != nil {
+		if err := p.options.Progress(importer.report.Pages); err != nil {
 			return err
 		}
-		if options.Progress != nil {
-			if err := options.Progress(index + 1); err != nil {
-				return err
-			}
+	}
+	p.ready[index] = true
+	return nil
+}
+
+// Reader 创建指定页的独立阅读快照，其他页仅保留尺寸和标识
+// 未包含的页面返回ErrIncompleteDocument；index为-1时仅返回索引，完整编辑或导出须使用Finish
+// 入参: ctx 取消上下文, index 页面索引
+// 返回: *Reader 阅读快照, error 转换或构建错误
+func (p *PDFImport) Reader(ctx context.Context, index int) (*Reader, error) {
+	if p.importer == nil {
+		return nil, fmt.Errorf("PDF import is closed")
+	}
+	if p.err != nil {
+		return nil, p.err
+	}
+	if index != -1 {
+		if err := p.ConvertPage(ctx, index); err != nil {
+			return nil, err
 		}
-		return ctx.Err()
-	})
+	}
+	snapshot := *p.importer.editor
+	snapshot.pages = slices.Clone(p.pages)
+	if index >= 0 {
+		snapshot.pages[index] = p.importer.editor.pages[index]
+	}
+	reader, err := snapshot.Reader(ctx)
 	if err != nil {
-		return nil, PDFImportReport{}, err
+		return nil, err
 	}
-	if importer.report.Pages == 0 {
-		return nil, PDFImportReport{}, fmt.Errorf("PDF contains no pages")
+	reader.pageReady = make(map[string]bool)
+	if index >= 0 {
+		reader.pageReady[reader.doc.Pages.Page[index].ID] = true
 	}
-	if err := importer.documentStructures(ctx); err != nil {
-		return nil, PDFImportReport{}, fmt.Errorf("import PDF structure: %w", err)
+	return reader, nil
+}
+
+// Finish 转换尚未就绪的页面并补全文档结构，返回独立编辑文档
+// 入参: ctx 取消上下文
+// 返回: *Editor 编辑文档, PDFImportReport 转换统计, error 转换错误
+func (p *PDFImport) Finish(ctx context.Context) (*Editor, PDFImportReport, error) {
+	if p.importer == nil {
+		return nil, PDFImportReport{}, fmt.Errorf("PDF import is closed")
 	}
-	return editor, importer.report, nil
+	for index := range p.pages {
+		if err := p.ConvertPage(ctx, index); err != nil {
+			return nil, PDFImportReport{}, err
+		}
+	}
+	if !p.finished {
+		p.importer.ctx = p.importer.resources.context(ctx)
+		if err := p.importer.documentStructures(p.importer.ctx); err != nil {
+			p.err = err
+			return nil, PDFImportReport{}, fmt.Errorf("import PDF structure: %w", err)
+		}
+		p.finished = true
+	}
+	return p.importer.editor, p.importer.report, nil
+}
+
+// Reset 放弃已转换内容并重建索引，保留文档标识及输出加密策略
+// 失败时保留原会话，已交付的阅读快照不受影响；输入源仍由调用方持有
+// 入参: ctx 本次重建的取消上下文
+// 返回: error 重建错误
+func (p *PDFImport) Reset(ctx context.Context) error {
+	if p.importer == nil {
+		return fmt.Errorf("PDF import is closed")
+	}
+	next, err := NewPDFImport(ctx, p.input, p.options)
+	if err != nil {
+		return err
+	}
+	next.importer.editor.Info.DocID = p.importer.editor.Info.DocID
+	next.importer.editor.encryption = p.importer.editor.encryption
+	p.Close()
+	*p = *next
+	return nil
+}
+
+// Close 释放PDF索引、引用缓存和转换状态，不关闭调用方的输入源
+// 返回: error 关闭错误
+func (p *PDFImport) Close() error {
+	if p.importer == nil {
+		return nil
+	}
+	p.importer.references.Close()
+	err := p.importer.reader.Close()
+	p.importer = nil
+	p.pages, p.ready = nil, nil
+	clear(p.options.Password)
+	p.options = PDFImportOptions{}
+	p.input = nil
+	return err
 }

 // ConvertPDF 将PDF转换并写入OFD，转换阶段失败时不写入目标
@@ -412,6 +624,67 @@ func (p *pdfImporter) referencePage(ctx context.Context, source *pdfgo.Reader, r
 	return p.references.Resolve(ctx, source, reference, p.resolveFile, p.resolveReference, p.warning)
 }

+// pageAnnotations 保留不可显示的源注解声明，其他注解仍按原顺序读取
+// 入参: ctx 取消上下文, page PDF页面
+// 返回: []pdfgo.Annotation 可显示的注解, error 输入、取消或严格校验错误
+func (p *pdfImporter) pageAnnotations(ctx context.Context, page *pdfgo.Page) ([]pdfgo.Annotation, error) {
+	annotations, err := page.AnnotationsContext(ctx)
+	if err == nil || p.warning == nil || !pdfAuxiliaryError(err) {
+		return annotations, err
+	}
+	object := page.Dictionary["Annots"]
+	if err := p.recoverPDFObject(ctx, "Page.Annots", object, err); err != nil {
+		return nil, err
+	}
+	value, err := p.reader.Resolve(object)
+	if err != nil {
+		return nil, p.recoverPDFObject(ctx, "Page.Annots", object, err)
+	}
+	array, ok := value.(pdfgo.Array)
+	if !ok {
+		return nil, ctx.Err()
+	}
+	for index, object := range array {
+		if err := ctx.Err(); err != nil {
+			return nil, err
+		}
+		candidate := *page
+		candidate.Dictionary = maps.Clone(page.Dictionary)
+		candidate.Dictionary["Annots"] = pdfgo.Array{object}
+		items, err := candidate.AnnotationsContext(ctx)
+		if err != nil && pdfAuxiliaryError(err) {
+			value, resolveErr := p.reader.Resolve(object)
+			if resolveErr != nil && !pdfAuxiliaryError(resolveErr) {
+				return nil, resolveErr
+			}
+			if dict, ok := value.(pdfgo.Dictionary); ok && dict["AP"] != nil {
+				subtype, resolveErr := p.reader.Resolve(dict["Subtype"])
+				if resolveErr != nil && !pdfAuxiliaryError(resolveErr) {
+					return nil, resolveErr
+				}
+				if _, named := subtype.(pdfgo.Name); !named && resolveErr == nil {
+					dict = maps.Clone(dict)
+					dict["Subtype"] = pdfgo.Name("Stamp")
+					candidate.Dictionary["Annots"] = pdfgo.Array{dict}
+					items, err = candidate.AnnotationsContext(ctx)
+				}
+			}
+		}
+		if err != nil {
+			if !pdfAuxiliaryError(err) {
+				return nil, err
+			}
+			p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("PDF annotation %d retained without appearance: %v", index+1, err)})
+			continue
+		}
+		if len(items) == 1 && items[0].Reference == (pdfgo.Reference{}) {
+			items[0].Reference, _ = object.(pdfgo.Reference)
+		}
+		annotations = append(annotations, items...)
+	}
+	return annotations, ctx.Err()
+}
+
 // objectValidation 在单次导入中共享不可变资源的校验结果，隔离局部编辑器
 // 返回: *editorValidation 当前编辑器的构建校验会话
 func (p *pdfImporter) objectValidation() *editorValidation {
@@ -18,7 +18,6 @@ import (
 	"bytes"
 	"context"
 	"encoding/xml"
-	"errors"
 	"fmt"
 	"math"
 	"strconv"
@@ -36,12 +35,15 @@ type pdfDestinationFontBackend struct {
 // 入参: ctx 取消上下文
 // 返回: error 动作、编码或取消错误
 func (p *pdfImporter) documentOpenActions(ctx context.Context) error {
+	raw, err := p.pdfCatalogObject("OpenAction")
+	if err != nil {
+		return err
+	}
 	opened, err := p.reader.ReadOpenAction(ctx)
 	if err != nil {
-		if p.warning == nil || !errors.Is(err, pdfgo.ErrInvalidDestination) {
+		if err := p.recoverPDFObject(ctx, "OpenAction", raw, err); err != nil {
 			return err
 		}
-		p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("invalid PDF initial destination ignored: %v", err)})
 	}
 	var object pdfgo.Object
 	if opened.Action != nil {
@@ -52,7 +54,7 @@ func (p *pdfImporter) documentOpenActions(ctx context.Context) error {
 		object = pdfgo.Dictionary{"S": pdfgo.Name("GoTo"), "D": array}
 	}
 	currentPage := 0
-	actions, err := p.eventActions(ctx, object, "DO", pdfgo.Annotation{}, &currentPage)
+	actions, err := p.eventActions(ctx, object, "DO", pdfgo.Annotation{}, &currentPage, raw)
 	if err != nil {
 		return err
 	}
@@ -61,11 +63,18 @@ func (p *pdfImporter) documentOpenActions(ctx context.Context) error {
 	}
 	triggers, err := p.reader.ReadDocumentTriggers(ctx)
 	if err != nil {
-		return err
+		object, readErr := p.pdfCatalogObject("AA")
+		if readErr != nil {
+			return readErr
+		}
+		return p.recoverPDFObject(ctx, "Document.AA", object, err)
 	}
 	for _, trigger := range triggers {
 		if _, err := p.reader.ReadJavaScriptAction(ctx, trigger.Action); err != nil {
-			return err
+			if err := p.recoverPDFObject(ctx, "Document.AA."+string(trigger.Event), trigger.Action, err); err != nil {
+				return err
+			}
+			continue
 		}
 		if err := p.unmappedTrigger(ctx, "document", trigger); err != nil {
 			return err
@@ -81,7 +90,7 @@ func (p *pdfImporter) pageOpenActions(ctx context.Context, page *pdfgo.Page) err
 	p.pageActionPage = p.page
 	triggers, err := p.reader.ReadPageTriggers(ctx, page)
 	if err != nil {
-		return err
+		return p.recoverPDFObject(ctx, "Page.AA", page.Dictionary["AA"], err)
 	}
 	for _, trigger := range triggers {
 		if trigger.Event != "O" {
@@ -102,32 +111,59 @@ func (p *pdfImporter) pageOpenActions(ctx context.Context, page *pdfgo.Page) err
 }

 // eventActions 按原顺序转换动作链，保留事件类型与链内跳转页状态
-// 入参: ctx 取消上下文, object 动作对象, event OFD事件, source 触发注解，零值表示非图元动作, currentPage 当前页面
+// 入参: ctx 取消上下文, object 动作对象, event OFD事件, source 触发注解，零值表示非图元动作, currentPage 当前页面, original 可选原始来源
 // 返回: []Action 转换动作, error 动作或取消错误
-func (p *pdfImporter) eventActions(ctx context.Context, object pdfgo.Object, event string, source pdfgo.Annotation, currentPage *int) ([]Action, error) {
+func (p *pdfImporter) eventActions(ctx context.Context, object pdfgo.Object, event string, source pdfgo.Annotation, currentPage *int, original ...pdfgo.Object) ([]Action, error) {
+	raw := object
+	if len(original) != 0 {
+		raw = original[0]
+	}
+	retained, warned := false, false
+	warning := p.warning
+	if warning != nil {
+		p.warning = func(diagnostic pdfgo.Diagnostic) {
+			warned = true
+			warning(diagnostic)
+		}
+		defer func() { p.warning = warning }()
+	}
+	retain := func(cause error) error {
+		if cause != nil && (p.warning == nil || !pdfAuxiliaryError(cause)) {
+			return cause
+		}
+		if retained {
+			if cause != nil {
+				p.warning(pdfgo.Diagnostic{Message: "PDF Action." + event + " retained as metadata: " + cause.Error()})
+			}
+			return ctx.Err()
+		}
+		var err error
+		if cause != nil {
+			err = p.recoverPDFObject(ctx, "Action."+event, raw, cause)
+		} else if p.warning != nil {
+			err = p.preservePDFObject(ctx, "Action."+event, raw)
+		}
+		retained = err == nil
+		return err
+	}
 	var actions []Action
+	var conversionErr error
 	err := p.reader.WalkActions(ctx, object, func(info pdfgo.ActionInfo) error {
 		annotation := source
 		annotation.Dictionary = pdfgo.Dictionary{"A": info.Dictionary}
-		converted, err := p.linkActions(annotation, p.warning == nil, currentPage)
+		warned = false
+		warnings := len(p.report.Warnings)
+		converted, err := p.convertLinkActions(annotation, p.warning == nil, currentPage)
 		if err != nil {
-			if errors.Is(err, errPDFMediaRead) {
+			conversionErr = retain(err)
+			*currentPage = -1
+			return conversionErr
+		}
+		if p.warning != nil && (converted == nil || warned || len(p.report.Warnings) != warnings) {
+			if err := retain(nil); err != nil {
+				conversionErr = err
 				return err
 			}
-			var unsupported *pdfgo.UnsupportedError
-			if event != "CLICK" && p.warning != nil && errors.Is(err, pdfgo.ErrInvalidAction) {
-				p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("invalid PDF %s action ignored: %v", event, err)})
-				return nil
-			}
-			if event != "CLICK" && p.warning != nil && errors.Is(err, pdfgo.ErrInvalidDestination) {
-				p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("invalid PDF %s destination ignored: %v", event, err)})
-				return nil
-			}
-			if event != "CLICK" && p.warning != nil && errors.As(err, &unsupported) {
-				p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("PDF %s action not transferred to OFD: %s", event, unsupported.Feature)})
-				return nil
-			}
-			return err
 		}
 		for _, action := range converted {
 			action.Event = event
@@ -135,8 +171,14 @@ func (p *pdfImporter) eventActions(ctx context.Context, object pdfgo.Object, eve
 		}
 		return nil
 	})
+	if conversionErr != nil {
+		return nil, conversionErr
+	}
 	if err != nil {
-		return nil, err
+		if err := retain(err); err != nil {
+			return nil, err
+		}
+		*currentPage = -1
 	}
 	return actions, ctx.Err()
 }
@@ -146,14 +188,10 @@ func (p *pdfImporter) eventActions(ctx context.Context, object pdfgo.Object, eve
 // 返回: error 动作链、取消或严格模式错误
 func (p *pdfImporter) unmappedTrigger(ctx context.Context, owner string, trigger pdfgo.ActionTrigger) error {
 	if err := p.reader.WalkActions(ctx, trigger.Action, func(pdfgo.ActionInfo) error { return nil }); err != nil {
-		return err
+		return p.recoverPDFObject(ctx, owner+".AA."+string(trigger.Event), trigger.Action, err)
 	}
 	feature := owner + " trigger " + string(trigger.Event)
-	if p.warning == nil {
-		return &pdfgo.UnsupportedError{Feature: feature}
-	}
-	p.warning(pdfgo.Diagnostic{Message: "PDF " + feature + " not transferred to OFD"})
-	return nil
+	return p.recoverPDFObject(ctx, owner+".AA."+string(trigger.Event), trigger.Action, &pdfgo.UnsupportedError{Feature: feature})
 }

 // annotationTriggerActions 按事件转换注解动作，页面打开动作独立于注解外观
@@ -165,7 +203,7 @@ func (p *pdfImporter) annotationTriggerActions(ctx context.Context, annotation p
 	}
 	triggers, err := p.reader.ReadAnnotationTriggers(ctx, annotation)
 	if err != nil {
-		return nil, err
+		return nil, p.recoverPDFObject(ctx, "Annotation.AA", annotation.Dictionary["AA"], err)
 	}
 	if len(triggers) == 0 {
 		return nil, ctx.Err()
@@ -193,7 +231,10 @@ func (p *pdfImporter) annotationTriggerActions(ctx context.Context, annotation p
 		switch trigger.Event {
 		case "U", "PO":
 		default:
-			return nil, &pdfgo.UnsupportedError{Feature: "annotation trigger " + string(trigger.Event)}
+			if err := p.unmappedTrigger(ctx, "annotation", trigger); err != nil {
+				return nil, err
+			}
+			continue
 		}
 		currentPage := p.page
 		if event == "PO" {
@@ -246,6 +287,7 @@ func (p *pdfImporter) destinationBounds(page *pdfgo.Page) (Box, error) {
 	}
 	matrix, width, height := codecpdf.PageMatrix(page)
 	editor := NewEditor()
+	editor.SetResources(p.resources)
 	editor.SetRenderBackends(p.editor.Backends())
 	editor.SetFontDirs(p.editor.fontDirs...)
 	editor.SetFontFS(p.editor.fontFS...)
@@ -255,8 +297,10 @@ func (p *pdfImporter) destinationBounds(page *pdfgo.Page) (Box, error) {
 		return Box{}, err
 	}
 	local := pdfImporter{
-		ctx: p.ctx, reader: p.reader, editor: editor, renderer: p.renderer,
-		matrix: matrix, pageBox: page.CropBox, pageWidth: width, pageHeight: height,
+		resources: p.resources,
+		ctx:       p.ctx, reader: p.reader, editor: editor, renderer: p.renderer,
+		warning: p.warning,
+		matrix:  matrix, pageBox: page.CropBox, pageWidth: width, pageHeight: height,
 		rasterDPI: p.rasterDPI, fontIDs: make(map[*pdfgo.Font]string),
 		resolveFile: p.resolveFile, resolveReference: p.resolveReference,
 		references: &codecpdf.ReferenceCache{},
@@ -271,7 +315,7 @@ func (p *pdfImporter) destinationBounds(page *pdfgo.Page) (Box, error) {
 	if err := local.commitObjects(); err != nil {
 		return Box{}, err
 	}
-	reader, err := editor.resourceReader()
+	reader, err := local.temporaryReader()
 	if err != nil {
 		return Box{}, err
 	}
@@ -318,17 +362,15 @@ func (p *pdfImporter) destinationBounds(page *pdfgo.Page) (Box, error) {
 // 返回: error 严格模式转换错误或取消错误
 func (p *pdfImporter) outlines(ctx context.Context) error {
 	count := 0
+	var conversionErr error
 	data, err := encodeOFDXMLContext(ctx, func(x *ofdXML) {
 		x.root("Outlines", nil)
 		depth := 0
 		err := p.reader.WalkOutlines(ctx, func(level int, item pdfgo.OutlineItem) error {
 			actions, err := p.outlineActions(ctx, item)
 			if err != nil {
-				if p.warning == nil || ctx.Err() != nil || errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) || errors.Is(err, errPDFMediaRead) {
-					return err
-				}
-				p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("PDF outline %q actions not transferred to OFD: %v", item.Title, err)})
-				actions = nil
+				conversionErr = err
+				return err
 			}
 			for depth > level {
 				x.end("OutlineElem")
@@ -352,15 +394,21 @@ func (p *pdfImporter) outlines(ctx context.Context) error {
 		}
 		x.end("Outlines")
 	})
+	if conversionErr != nil {
+		return conversionErr
+	}
 	if err != nil {
 		if ctx.Err() != nil {
 			return ctx.Err()
 		}
-		if p.warning == nil || errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) || errors.Is(err, errPDFMediaRead) {
+		if p.warning == nil || !pdfAuxiliaryError(err) {
 			return err
 		}
-		p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("PDF outlines not transferred to OFD: %v", err)})
-		return nil
+		object, readErr := p.pdfCatalogObject("Outlines")
+		if readErr != nil {
+			return readErr
+		}
+		return p.recoverPDFObject(ctx, "Outlines", object, err)
 	}
 	if count > 0 {
 		p.editor.outlines = bytes.TrimPrefix(data, []byte(xml.Header))
@@ -372,42 +420,22 @@ func (p *pdfImporter) outlines(ctx context.Context) error {
 // 入参: ctx 取消上下文, item PDF目录节点
 // 返回: []Action OFD动作序列, error 动作或取消错误
 func (p *pdfImporter) outlineActions(ctx context.Context, item pdfgo.OutlineItem) ([]Action, error) {
+	raw := item.Action
 	object, err := p.reader.Resolve(item.Action)
 	if err != nil {
-		return nil, err
+		return nil, p.recoverPDFObject(ctx, "Outline.A", item.Action, err)
 	}
 	dest, err := p.reader.Resolve(item.Destination)
 	if err != nil {
-		return nil, err
+		return nil, p.recoverPDFObject(ctx, "Outline.Dest", item.Destination, err)
 	}
 	if dest != nil {
 		if object != nil {
-			return nil, fmt.Errorf("PDF outline has both destination and action")
+			return nil, p.recoverPDFObject(ctx, "Outline", pdfgo.Dictionary{"A": item.Action, "Dest": item.Destination}, fmt.Errorf("PDF outline has both destination and action"))
 		}
 		object = pdfgo.Dictionary{"S": pdfgo.Name("GoTo"), "D": dest}
+		raw = item.Destination
 	}
 	currentPage := -1
-	var actions []Action
-	err = p.reader.WalkActions(ctx, object, func(info pdfgo.ActionInfo) error {
-		converted, err := p.linkActions(pdfgo.Annotation{Dictionary: pdfgo.Dictionary{"A": info.Dictionary}}, p.warning == nil, &currentPage)
-		if err != nil {
-			if errors.Is(err, errPDFMediaRead) {
-				return err
-			}
-			var unsupported *pdfgo.UnsupportedError
-			if p.warning != nil && (errors.As(err, &unsupported) || errors.Is(err, pdfgo.ErrInvalidDestination) || errors.Is(err, pdfgo.ErrInvalidAction)) {
-				p.warning(pdfgo.Diagnostic{Message: fmt.Sprintf("PDF outline action not transferred to OFD: %v", err)})
-				currentPage = -1
-				return nil
-			}
-			return err
-		}
-		if converted != nil {
-			actions = append(actions, converted...)
-		} else {
-			currentPage = -1
-		}
-		return nil
-	})
-	return actions, err
+	return p.eventActions(ctx, object, "CLICK", pdfgo.Annotation{}, &currentPage, raw)
 }
@@ -19,6 +19,7 @@ import (
 	"context"
 	"encoding/json"
 	"encoding/xml"
+	"errors"
 	"fmt"
 	"maps"
 	"math"
@@ -27,10 +28,145 @@ import (
 	"github.com/xiaoqidun/pdfgo"
 )

+// recoverAnnotationAuxiliary 仅在存在有效正常外观时保留辅助错误，外观仍由调用方实际绘制
+// 入参: ctx 取消上下文, annotation 原始注解, name 辅助字段名, object 原始对象, cause 辅助错误
+// 返回: error 严格模式、缺少有效外观或不可恢复错误
+func (p *pdfImporter) recoverAnnotationAuxiliary(ctx context.Context, annotation pdfgo.Annotation, name string, object pdfgo.Object, cause error) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	if p.warning == nil || !pdfAuxiliaryError(cause) {
+		return cause
+	}
+	appearance, err := p.reader.ReadAnnotationAppearance(annotation)
+	if err != nil {
+		return err
+	}
+	if appearance == nil {
+		return cause
+	}
+	return p.recoverPDFObject(ctx, name, object, cause)
+}
+
+// popupAnnotation 单独恢复弹窗的打开状态和父引用，不忽略外观或几何错误
+// 入参: ctx 取消上下文, object 原始弹窗对象
+// 返回: pdfgo.PopupAnnotation 弹窗信息, error 读取或不可恢复错误
+func (p *pdfImporter) popupAnnotation(ctx context.Context, object pdfgo.Object) (pdfgo.PopupAnnotation, error) {
+	value, err := p.reader.Resolve(object)
+	if err != nil {
+		return pdfgo.PopupAnnotation{}, p.recoverPDFObject(ctx, "Annotation.Popup", object, err)
+	}
+	if value == nil {
+		return pdfgo.PopupAnnotation{}, nil
+	}
+	dict, ok := value.(pdfgo.Dictionary)
+	if !ok {
+		return pdfgo.PopupAnnotation{}, p.recoverPDFObject(ctx, "Annotation.Popup", object, fmt.Errorf("invalid popup annotation"))
+	}
+	dict = maps.Clone(dict)
+	open, err := p.reader.Resolve(dict["Open"])
+	if err == nil && open != nil && open != pdfgo.Boolean(false) && open != pdfgo.Boolean(true) {
+		err = fmt.Errorf("invalid popup open state")
+	}
+	if err != nil {
+		if err := p.recoverPDFObject(ctx, "Annotation.Popup.Open", dict["Open"], err); err != nil {
+			return pdfgo.PopupAnnotation{}, err
+		}
+		delete(dict, "Open")
+	}
+	if object := dict["Parent"]; object != nil {
+		parent, reference := object.(pdfgo.Reference)
+		value, err := p.reader.Resolve(object)
+		if err == nil && value != nil {
+			parentDict, ok := value.(pdfgo.Dictionary)
+			if !reference || !ok {
+				err = fmt.Errorf("invalid popup parent annotation")
+			} else {
+				subtype, resolveErr := p.reader.Resolve(parentDict["Subtype"])
+				err = resolveErr
+				if kind, ok := subtype.(pdfgo.Name); err == nil && (!ok || kind == "Popup") {
+					err = fmt.Errorf("invalid popup parent subtype")
+				}
+			}
+		} else if err == nil && !reference {
+			err = fmt.Errorf("invalid popup parent reference")
+		}
+		if err != nil {
+			if err := p.recoverPDFObject(ctx, "Annotation.Popup.Parent", object, err); err != nil {
+				return pdfgo.PopupAnnotation{}, err
+			}
+			delete(dict, "Parent")
+		} else {
+			dict["Parent"] = parent
+		}
+	}
+	return p.reader.ReadPopupAnnotation(dict)
+}
+
+// annotationOpen 读取文本注解初始打开状态，单独保留无效辅助字段
+// 入参: ctx 取消上下文, dict 注解字典
+// 返回: pdfgo.Object 打开状态, error 不可恢复错误
+func (p *pdfImporter) annotationOpen(ctx context.Context, dict pdfgo.Dictionary) (pdfgo.Object, error) {
+	value, err := p.reader.Resolve(dict["Open"])
+	if err == nil && value != nil && value != pdfgo.Boolean(false) && value != pdfgo.Boolean(true) {
+		err = fmt.Errorf("invalid PDF text annotation open state")
+	}
+	if err != nil {
+		return nil, p.recoverPDFObject(ctx, "Annotation.Open", dict["Open"], err)
+	}
+	return value, nil
+}
+
 // appearanceAnnotation 将PDF静态外观转换为对应类型的OFD注解
 // 入参: ctx 取消上下文, page PDF页面, annotation PDF注解, actions 外观区域的动作
 // 返回: error 外观或转换错误
 func (p *pdfImporter) appearanceAnnotation(ctx context.Context, page *pdfgo.Page, annotation pdfgo.Annotation, actions ...Action) error {
+	if annotation.Rect.XMin == annotation.Rect.XMax || annotation.Rect.YMin == annotation.Rect.YMax {
+		return p.paintedAnnotation(ctx, page, annotation, nil, actions...)
+	}
+	if !annotation.IsStandard() {
+		flags, err := p.reader.ReadAnnotationFlags(annotation)
+		if err != nil {
+			return err
+		}
+		if flags&1 != 0 {
+			return p.paintedAnnotation(ctx, page, annotation, nil, actions...)
+		}
+	}
+	if p.warning != nil && annotation.Dictionary["AP"] == nil && annotation.Dictionary["BS"] == nil && annotation.Dictionary["Border"] != nil {
+		border, err := p.reader.Resolve(annotation.Dictionary["Border"])
+		if err != nil {
+			return err
+		}
+		if array, ok := border.(pdfgo.Array); ok && len(array) == 0 {
+			if err := p.preservePDFObject(ctx, "Annotation.Border", annotation.Dictionary["Border"]); err != nil {
+				return err
+			}
+		}
+	}
+	if annotation.Dictionary["AP"] != nil {
+		if _, err := p.reader.ReadAnnotationAppearance(annotation); err != nil {
+			if !errors.Is(err, pdfgo.ErrInvalidAnnotationAppearance) {
+				return err
+			}
+			if p.warning == nil {
+				return err
+			}
+			if err := p.preservePDFObject(ctx, "Annotation.Appearance", annotation.Dictionary); err != nil {
+				return err
+			}
+		}
+	}
+	switch annotation.Subtype {
+	case "PrinterMark", "TrapNet", "3D", "RichMedia", "Watermark":
+		appearance, err := p.reader.Resolve(annotation.Dictionary["AP"])
+		if err != nil {
+			return err
+		}
+		if appearance == nil {
+			return p.recoverPDFObject(ctx, "Annotation.Appearance", annotation.Dictionary, &pdfgo.UnsupportedError{Feature: "annotation without static appearance"})
+		}
+	}
 	return p.paintedAnnotation(ctx, page, annotation, nil, actions...)
 }

@@ -38,6 +174,21 @@ func (p *pdfImporter) appearanceAnnotation(ctx context.Context, page *pdfgo.Page
 // 入参: ctx 取消上下文, page PDF页面, annotation PDF注解, paint 绘制回调，空值使用原外观, actions 外观区域的动作
 // 返回: error 外观或转换错误
 func (p *pdfImporter) paintedAnnotation(ctx context.Context, page *pdfgo.Page, annotation pdfgo.Annotation, paint func(*pdfImporter) error, actions ...Action) error {
+	if annotation.Subtype == "Projection" {
+		if _, err := p.reader.ReadProjectionAnnotation(annotation); err != nil {
+			if p.warning == nil || !pdfAuxiliaryError(err) {
+				return err
+			}
+			if _, err := p.reader.ReadAnnotationAppearance(annotation); err != nil {
+				return err
+			}
+			if err := p.recoverPDFObject(ctx, "Annotation.Projection.ExData", annotation.Dictionary["ExData"], err); err != nil {
+				return err
+			}
+			annotation.Dictionary = maps.Clone(annotation.Dictionary)
+			delete(annotation.Dictionary, "ExData")
+		}
+	}
 	clicks, err := p.annotationTriggerActions(ctx, annotation, "CLICK")
 	if err != nil {
 		return err
@@ -50,11 +201,13 @@ func (p *pdfImporter) paintedAnnotation(ctx context.Context, page *pdfgo.Page, a
 			continue
 		}
 		value, err := p.reader.Resolve(annotation.Dictionary[key])
-		if err != nil {
-			return err
-		}
-		if value != nil {
-			return &pdfgo.UnsupportedError{Feature: fmt.Sprintf("annotation field %q", key)}
+		if value != nil || err != nil {
+			if err == nil {
+				err = &pdfgo.UnsupportedError{Feature: fmt.Sprintf("annotation field %q", key)}
+			}
+			if err := p.recoverPDFObject(ctx, "Annotation."+string(key), annotation.Dictionary[key], err); err != nil {
+				return err
+			}
 		}
 	}
 	remark, err := p.reader.ReadAnnotationTextContext(ctx, annotation, "Contents", p.warning)
@@ -74,7 +227,9 @@ func (p *pdfImporter) paintedAnnotation(ctx context.Context, page *pdfgo.Page, a
 	}
 	invisible := flags&1 != 0 && !annotation.IsStandard()
 	if flags&256 != 0 {
-		return &pdfgo.UnsupportedError{Feature: "annotation ToggleNoView flag"}
+		if err := p.recoverPDFObject(ctx, "Annotation.F", annotation.Dictionary["F"], &pdfgo.UnsupportedError{Feature: "annotation ToggleNoView flag"}); err != nil {
+			return err
+		}
 	}
 	box := pdfBounds([]pdfgo.Point{
 		p.matrix.Apply(pdfgo.Point{X: annotation.Rect.XMin, Y: annotation.Rect.YMin}),
@@ -85,7 +240,9 @@ func (p *pdfImporter) paintedAnnotation(ctx context.Context, page *pdfgo.Page, a
 	if len(clicks) != 0 && annotation.Subtype == "Link" {
 		region, err := p.linkRegion(annotation, box)
 		if err != nil {
-			return err
+			if err := p.recoverPDFObject(ctx, "Annotation.QuadPoints", annotation.Dictionary["QuadPoints"], err); err != nil {
+				return err
+			}
 		}
 		for i := range clicks {
 			clicks[i].Region = region
@@ -151,21 +308,18 @@ func (p *pdfImporter) paintedAnnotation(ctx context.Context, page *pdfgo.Page, a
 		converted.Parameters = &AnnotationParameters{Parameter: []AnnotationParameter{{Name: "PDF.Redact.Pending", Value: "true"}}}
 	}
 	if annotation.Subtype == "Text" {
-		value, err := p.reader.Resolve(annotation.Dictionary["Open"])
+		value, err := p.annotationOpen(ctx, annotation.Dictionary)
 		if err != nil {
 			return err
 		}
 		converted.Parameters = &AnnotationParameters{Parameter: []AnnotationParameter{{Name: "PDF.Text.Open", Value: strconv.FormatBool(value == pdfgo.Boolean(true))}}}
 	}
-	popupObject, err := p.reader.Resolve(annotation.Dictionary["Popup"])
-	if err != nil {
-		return err
-	}
+	popupObject := annotation.Dictionary["Popup"]
 	if annotation.Subtype == "Popup" {
 		popupObject = annotation.Dictionary
 	}
 	if popupObject != nil {
-		popup, err := p.reader.ReadPopupAnnotation(popupObject)
+		popup, err := p.popupAnnotation(ctx, popupObject)
 		if err != nil {
 			return err
 		}
@@ -177,6 +331,12 @@ func (p *pdfImporter) paintedAnnotation(ctx context.Context, page *pdfgo.Page, a
 			{Name: "PDF.Popup.Rect", Value: fmt.Sprintf("%g %g %g %g", popup.Rect.XMin, popup.Rect.YMin, popup.Rect.XMax, popup.Rect.YMax)},
 		}...)
 	}
+	if annotation.Subtype != "Popup" {
+		if converted.Parameters == nil {
+			converted.Parameters = &AnnotationParameters{}
+		}
+		converted.Parameters.Parameter = append(converted.Parameters.Parameter, AnnotationParameter{Name: "PDF.Printable", Value: strconv.FormatBool(flags&4 != 0 && flags&2 == 0 && !invisible)})
+	}
 	if len(actions) != 0 {
 		region, err := NewShape(ShapeRectangle, Box{X: playback.X - box.X, Y: playback.Y - box.Y, W: playback.W, H: playback.H})
 		if err != nil {
@@ -32,6 +32,9 @@ const (
 	pdfTransferShape    uint8 = 16
 )

+// pdfCompositeTileSize 限定单次合成块的像素边长
+const pdfCompositeTileSize = codecpdf.CompositeTileSize
+
 // pdfCompositeNode 保留局部合成所需的原始图元和透明组层级
 type pdfCompositeNode struct {
 	path       *pdfgo.PathMark
@@ -123,6 +126,7 @@ type pdfCompositeImageColor struct {

 // pdfCompositeCache 在单页内复用几何、图像分量及蒙版内容
 type pdfCompositeCache struct {
+	resources       *Resources
 	geometry        *renderCache[pdfCompositeSceneKey, pdfCompositeGeometry]
 	clips           *renderCache[[32]byte, GeometryPath]
 	bounds          map[pdfCompositeKey]Box
@@ -142,9 +146,6 @@ type pdfCompositeCache struct {
 	groups          map[*pdfgo.GroupMark]Box
 }

-// pdfCompositeTileSize 限定单次合成块的像素边长
-const pdfCompositeTileSize = codecpdf.CompositeTileSize
-
 // pdfCompositeScratch 复用像素及蒙版缓冲，不跨页持有活动内容
 type pdfCompositeScratch struct {
 	pixels   codecpdf.CompositeBuffers[pdfCompositePixel]
@@ -157,7 +158,7 @@ type pdfCompositeScratch struct {
 // 返回: *pdfCompositeCache 当前页面缓存
 func (p *pdfImporter) compositingCache() *pdfCompositeCache {
 	if p.compositeCache == nil {
-		p.compositeCache = &pdfCompositeCache{images: map[*pdfgo.Image]*pdfgo.ImageComponents{}, masks: map[*pdfgo.SoftMask][]pdfCompositeNode{}, meshes: map[*pdfgo.MeshGradient][]codecpdf.MeshTriangle{}}
+		p.compositeCache = &pdfCompositeCache{resources: p.resources, images: map[*pdfgo.Image]*pdfgo.ImageComponents{}, masks: map[*pdfgo.SoftMask][]pdfCompositeNode{}, meshes: map[*pdfgo.MeshGradient][]codecpdf.MeshTriangle{}}
 	}
 	return p.compositeCache
 }
@@ -166,7 +167,7 @@ func (p *pdfImporter) compositingCache() *pdfCompositeCache {
 // 返回: *renderCache[pdfCompositeSceneKey, pdfCompositeGeometry] 单页场景缓存
 func (c *pdfCompositeCache) geometryCache() *renderCache[pdfCompositeSceneKey, pdfCompositeGeometry] {
 	if c.geometry == nil {
-		c.geometry = &renderCache[pdfCompositeSceneKey, pdfCompositeGeometry]{limit: 64 << 20}
+		c.geometry = resourceCache[pdfCompositeSceneKey, pdfCompositeGeometry](c.resources, 64<<20)
 	}
 	return c.geometry
 }
@@ -175,7 +176,7 @@ func (c *pdfCompositeCache) geometryCache() *renderCache[pdfCompositeSceneKey, p
 // 返回: *renderCache[[32]byte, GeometryPath] 裁剪缓存
 func (c *pdfCompositeCache) clipCache() *renderCache[[32]byte, GeometryPath] {
 	if c.clips == nil {
-		c.clips = &renderCache[[32]byte, GeometryPath]{limit: 8 << 20}
+		c.clips = resourceCache[[32]byte, GeometryPath](c.resources, 8<<20)
 	}
 	return c.clips
 }
@@ -108,7 +108,7 @@ func (p *pdfImporter) compositeForm(nodes []pdfCompositeNode) (bool, error) {
 		return true, nil
 	}
 	if p.formResources == nil || p.formResources.editor != p.editor {
-		p.formResources = &pdfFormCache{editor: p.editor, entries: renderCache[[32]byte, pdfFormResource]{limit: 32 << 20}}
+		p.formResources = &pdfFormCache{editor: p.editor, entries: *resourceCache[[32]byte, pdfFormResource](p.resources, 32<<20)}
 	}
 	cache := p.formResources
 	defer cache.reset()
@@ -54,6 +54,9 @@ func pdfGeometryPath(ctx context.Context, source pdfgo.Path, matrix pdfgo.Matrix
 // 入参: node 图元, stroke 是否描边
 // 返回: *RasterPage 覆盖场景, Box 页面区域, error 编译错误
 func (p *pdfImporter) compileCoverage(node pdfCompositeNode, stroke bool) (*RasterPage, Box, error) {
+	if node.path != nil && pdfPaintedPathEmpty(node.path.Path) {
+		return nil, Box{}, p.emptyPaintedPath()
+	}
 	fallback := func() (*RasterPage, Box, error) {
 		return p.compileGroup(func(local *pdfImporter) error { return node.coverage(local, stroke) })
 	}
@@ -95,7 +98,7 @@ func (p *pdfImporter) compileCoverage(node pdfCompositeNode, stroke bool) (*Rast
 		return nil, Box{}, err
 	}
 	if len(path) == 0 {
-		return nil, Box{}, fmt.Errorf("empty PDF painted path")
+		return nil, Box{}, p.emptyPaintedPath()
 	}
 	path = GeometryPath(basegeom.Close(basegeom.Path(path)))
 	clip, err := p.coverageClip(style.Clips, geometry)
@@ -298,6 +301,12 @@ func (b *pdfPointBounds) box() Box {
 // 入参: mark PDF路径绘制信息
 // 返回: error 错误信息
 func (p *pdfImporter) path(mark pdfgo.PathMark) error {
+	if err := p.ctx.Err(); err != nil {
+		return err
+	}
+	if pdfPaintedPathEmpty(mark.Path) {
+		return p.emptyPaintedPath()
+	}
 	if mark.Style.BlendMode != "" && mark.Style.BlendMode != "Normal" && mark.Style.BlendMode != "Compatible" {
 		return &pdfgo.UnsupportedError{Feature: "path blend mode " + string(mark.Style.BlendMode)}
 	}
@@ -308,6 +317,9 @@ func (p *pdfImporter) path(mark pdfgo.PathMark) error {
 // 入参: mark PDF路径绘制信息
 // 返回: error 错误信息
 func (p *pdfImporter) appendPath(mark pdfgo.PathMark) error {
+	if pdfPaintedPathEmpty(mark.Path) {
+		return p.emptyPaintedPath()
+	}
 	var err error
 	mark.Style, err = p.maskStyle(mark.Style)
 	if err != nil {
@@ -331,9 +343,6 @@ func (p *pdfImporter) appendPath(mark pdfgo.PathMark) error {
 	if err != nil {
 		return err
 	}
-	if box == (Box{}) {
-		return fmt.Errorf("empty PDF painted path")
-	}
 	scale := math.Hypot(p.matrix[0], p.matrix[1])
 	drawing, origin, ctm := *p, box, ""
 	marginScale := scale
@@ -410,6 +419,31 @@ func (p *pdfImporter) appendPath(mark pdfgo.PathMark) error {
 	return nil
 }

+// pdfPaintedPathEmpty 判断无坐标路径，不排除具有坐标的退化描边
+// 入参: path PDF路径
+// 返回: bool 是否没有坐标
+func pdfPaintedPathEmpty(path pdfgo.Path) bool {
+	for _, segment := range path.Segments {
+		if segment.Operator != "C" || len(segment.Points) != 0 {
+			return false
+		}
+	}
+	return true
+}
+
+// emptyPaintedPath 按诊断策略忽略不绘制内容的空路径，严格模式仍拒绝
+// 返回: error 严格模式或取消错误
+func (p *pdfImporter) emptyPaintedPath() error {
+	if err := p.ctx.Err(); err != nil {
+		return err
+	}
+	if p.warning == nil {
+		return fmt.Errorf("empty PDF painted path")
+	}
+	p.warning(pdfgo.Diagnostic{Message: "empty PDF painted path ignored"})
+	return p.ctx.Err()
+}
+
 // clipPath 复用页面内重复路径编码，按估算字节预算淘汰且不缓存错误
 // 入参: path 裁剪路径
 // 返回: pdfClipPath 变换后的边界及编码, error 取消错误
@@ -419,7 +453,7 @@ func (p *pdfImporter) clipPath(path pdfgo.Path) (pdfClipPath, error) {
 		return pdfClipPath{}, err
 	}
 	if p.clipPaths == nil {
-		p.clipPaths = &renderCache[[32]byte, pdfClipPath]{limit: 8 << 20}
+		p.clipPaths = resourceCache[[32]byte, pdfClipPath](p.resources, 8<<20)
 	}
 	if cached, ok := p.clipPaths.get(key); ok {
 		return cached, nil
@@ -383,6 +383,7 @@ func (p *pdfImporter) compileGroup(build func(*pdfImporter) error) (*RasterPage,
 		return nil, box, err
 	}
 	editor := NewEditor()
+	editor.SetResources(p.resources)
 	editor.SetRenderBackends(p.editor.Backends())
 	editor.SetFontDirs(p.editor.fontDirs...)
 	editor.SetFontFS(p.editor.fontFS...)
@@ -397,10 +398,13 @@ func (p *pdfImporter) compileGroup(build func(*pdfImporter) error) (*RasterPage,
 	if p.symbolFonts == nil {
 		p.symbolFonts = make(map[*pdfgo.Font]*pdfImportedFont)
 	}
-	if p.clipPaths == nil {
-		p.clipPaths = &renderCache[[32]byte, pdfClipPath]{limit: 8 << 20}
+	if p.fontPrograms == nil {
+		p.fontPrograms = make(map[pdfFontProgramKey]*pdfImportedFont)
 	}
-	local := pdfImporter{ctx: p.ctx, reader: p.reader, editor: editor, renderer: p.renderer, matrix: p.matrix, pageBox: p.pageBox, pageWidth: p.pageWidth, pageHeight: p.pageHeight, rasterDPI: p.rasterDPI, warning: p.warning, rasterWarned: true, fontIDs: map[*pdfgo.Font]string{}, fonts: p.fonts, symbolFonts: p.symbolFonts, clipPaths: p.clipPaths, textOrigins: p.textOrigins}
+	if p.clipPaths == nil {
+		p.clipPaths = resourceCache[[32]byte, pdfClipPath](p.resources, 8<<20)
+	}
+	local := pdfImporter{resources: p.resources, ctx: p.ctx, reader: p.reader, editor: editor, renderer: p.renderer, matrix: p.matrix, pageBox: p.pageBox, pageWidth: p.pageWidth, pageHeight: p.pageHeight, rasterDPI: p.rasterDPI, warning: p.warning, rasterWarned: true, fontIDs: map[*pdfgo.Font]string{}, fonts: p.fonts, fontPrograms: p.fontPrograms, symbolFonts: p.symbolFonts, clipPaths: p.clipPaths, textOrigins: p.textOrigins}
 	if err := build(&local); err != nil {
 		return nil, box, err
 	}
@@ -413,7 +417,7 @@ func (p *pdfImporter) compileGroup(build func(*pdfImporter) error) (*RasterPage,
 	if err := local.commitObjects(); err != nil {
 		return nil, box, err
 	}
-	reader, err := editor.resourceReader()
+	reader, err := local.temporaryReader()
 	if err != nil {
 		return nil, box, err
 	}
@@ -434,6 +438,18 @@ func (p *pdfImporter) compileGroup(build func(*pdfImporter) error) (*RasterPage,
 	return p.groupSceneBounds(scene)
 }

+// temporaryReader 为局部编译准备资源，带有保留信息时使用完整快照
+// 返回: *Reader 独立阅读器, error 准备或取消错误
+func (p *pdfImporter) temporaryReader() (*Reader, error) {
+	if err := p.ctx.Err(); err != nil {
+		return nil, err
+	}
+	if p.editor.source != nil || len(p.editor.origins) != 0 {
+		return p.editor.readerContext(p.ctx, nil)
+	}
+	return p.editor.resourceReader()
+}
+
 // groupSceneBounds 计算已编译场景在页面内的像素对齐区域
 // 入参: scene 中立绘制场景
 // 返回: *RasterPage 非空场景, Box 页面区域, error 度量错误
@@ -136,7 +136,7 @@ func (p *pdfImporter) image(mark pdfgo.ImageMark) error {
 		}
 		if cacheable {
 			if p.imageContents == nil {
-				p.imageContents = &renderCache[pdfImageContentKey, pdfImageContent]{limit: 8 << 20}
+				p.imageContents = resourceCache[pdfImageContentKey, pdfImageContent](p.resources, 8<<20)
 			}
 			if cached, found := p.imageContents.get(contentKey); found && cached.matches(source) {
 				id = cached.id
@@ -37,7 +37,7 @@ type pdfEmbeddedFile struct {
 // 返回: error 错误信息
 func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict bool) error {
 	p.movieBounds = nil
-	annotations, err := page.AnnotationsContext(ctx)
+	annotations, err := p.pageAnnotations(ctx, page)
 	if err != nil {
 		return err
 	}
@@ -70,7 +70,7 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 		if annotation.Subtype != "Popup" {
 			continue
 		}
-		popup, err := p.reader.ReadPopupAnnotation(annotation.Dictionary)
+		popup, err := p.popupAnnotation(ctx, annotation.Dictionary)
 		if err != nil {
 			return err
 		}
@@ -78,11 +78,15 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 			dict := maps.Clone(annotations[parent].Dictionary)
 			previous, err := p.reader.Resolve(dict["Popup"])
 			if err != nil {
-				return err
+				if err := p.recoverPDFObject(ctx, "Annotation.Popup", dict["Popup"], err); err != nil {
+					return err
+				}
 			}
 			if previous != nil {
 				if reference, ok := dict["Popup"].(pdfgo.Reference); !ok || reference != annotation.Reference {
-					return fmt.Errorf("inconsistent PDF popup parent")
+					if err := p.recoverPDFObject(ctx, "Annotation.Popup", dict["Popup"], fmt.Errorf("inconsistent PDF popup parent")); err != nil {
+						return err
+					}
 				}
 			}
 			dict["Popup"] = annotation.Dictionary
@@ -127,13 +131,10 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 			annotation.Dictionary = dict
 		}
 		if annotation.Subtype == "Text" {
-			value, err := p.reader.Resolve(dict["Open"])
+			value, err := p.annotationOpen(ctx, dict)
 			if err != nil {
 				return err
 			}
-			if value != nil && value != pdfgo.Boolean(false) && value != pdfgo.Boolean(true) {
-				return fmt.Errorf("invalid PDF text annotation open state")
-			}
 			if value == pdfgo.Boolean(true) {
 				if strict {
 					return &pdfgo.UnsupportedError{Feature: "initially open text annotation"}
@@ -141,20 +142,19 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 				p.warning(pdfgo.Diagnostic{Page: p.page + 1, Message: "PDF text annotation open state retained as annotation parameter"})
 			}
 		}
-		popupObject, err := p.reader.Resolve(dict["Popup"])
-		if err != nil {
-			return err
-		}
+		popupObject := dict["Popup"]
 		if annotation.Subtype == "Popup" {
 			popupObject = dict
 		}
 		if popupObject != nil {
-			popup, err := p.reader.ReadPopupAnnotation(popupObject)
+			popup, err := p.popupAnnotation(ctx, popupObject)
 			if err != nil {
 				return err
 			}
 			if annotation.Subtype != "Popup" && popup.Parent != (pdfgo.Reference{}) && popup.Parent != annotation.Reference {
-				return fmt.Errorf("inconsistent PDF popup parent")
+				if err := p.recoverPDFObject(ctx, "Annotation.Popup.Parent", popupObject, fmt.Errorf("inconsistent PDF popup parent")); err != nil {
+					return err
+				}
 			}
 			if popup.Open {
 				if strict {
@@ -166,11 +166,20 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 		if annotation.Subtype == "Sound" {
 			sound, err := p.reader.ReadSound(dict["Sound"])
 			if err != nil {
-				return err
+				if err := p.recoverPDFObject(ctx, "Annotation.Sound", dict["Sound"], err); err != nil {
+					return err
+				}
+				if err := p.appearanceAnnotation(ctx, page, annotation); err != nil {
+					return err
+				}
+				continue
 			}
 			id, err := p.soundResource(ctx, sound)
 			if err != nil {
-				return err
+				if err := p.recoverPDFObject(ctx, "Annotation.Sound", dict["Sound"], err); err != nil {
+					return err
+				}
+				id = ""
 			}
 			if id == "" {
 				if err := p.appearanceAnnotation(ctx, page, annotation); err != nil {
@@ -228,7 +237,13 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 		if annotation.Subtype == "Widget" {
 			field, err := p.reader.ReadField(annotation)
 			if err != nil {
-				return err
+				if err := p.recoverAnnotationAuxiliary(ctx, annotation, "Annotation.Field", annotation.Dictionary, err); err != nil {
+					return err
+				}
+				if err := p.appearanceAnnotation(ctx, page, annotation); err != nil {
+					return err
+				}
+				continue
 			}
 			annotation.Dictionary = field
 			if field["FT"] == pdfgo.Name("Sig") && field["V"] != nil {
@@ -273,10 +288,6 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 			}
 			continue
 		}
-		primary, err := p.reader.Resolve(dict["A"])
-		if err != nil {
-			return err
-		}
 		var actions []Action
 		currentPage := p.page
 		appendAction := func(dict pdfgo.Dictionary) error {
@@ -289,23 +300,29 @@ func (p *pdfImporter) annotations(ctx context.Context, page *pdfgo.Page, strict
 			actions = append(actions, converted...)
 			return nil
 		}
-		if primary == nil {
+		primary, err := p.reader.Resolve(dict["A"])
+		if err != nil {
+			if err := p.recoverPDFObject(ctx, "Annotation.A", dict["A"], err); err != nil {
+				return err
+			}
+		} else if primary == nil {
 			if err := appendAction(dict); err != nil {
 				return err
 			}
-		} else if err := p.reader.WalkActions(ctx, primary, func(info pdfgo.ActionInfo) error {
-			current := maps.Clone(dict)
-			current["A"] = info.Dictionary
-			return appendAction(current)
-		}); err != nil {
-			return err
+		} else {
+			actions, err = p.eventActions(ctx, dict["A"], "CLICK", annotation, &currentPage)
+			if err != nil {
+				return err
+			}
 		}

 		b := annotation.Rect
 		box := pdfBounds([]pdfgo.Point{p.matrix.Apply(pdfgo.Point{X: b.XMin, Y: b.YMin}), p.matrix.Apply(pdfgo.Point{X: b.XMax, Y: b.YMax})})
 		region, err := p.linkRegion(annotation, box)
 		if err != nil {
-			return err
+			if err := p.recoverPDFObject(ctx, "Annotation.QuadPoints", dict["QuadPoints"], err); err != nil {
+				return err
+			}
 		}
 		for i := range actions {
 			actions[i].Region = region
@@ -366,7 +383,32 @@ func (p *pdfImporter) linkRegion(annotation pdfgo.Annotation, box Box) (*Region,
 // linkActions 将单个PDF动作转换为有序OFD动作，保留动态媒体控制的目标范围
 // 入参: annotation 触发注解, strict 严格检查开关, currentPage 动作链当前页
 // 返回: []Action 动作序列，空切片表示无操作，nil表示未转换, error 转换错误
-func (p *pdfImporter) linkActions(annotation pdfgo.Annotation, strict bool, currentPage *int) ([]Action, error) {
+func (p *pdfImporter) linkActions(annotation pdfgo.Annotation, strict bool, currentPage *int) (actions []Action, err error) {
+	object := pdfgo.Dictionary{}
+	for _, key := range []pdfgo.Name{"A", "Dest"} {
+		if value, ok := annotation.Dictionary[key]; ok {
+			object[key] = value
+		}
+	}
+	warnings := len(p.report.Warnings)
+	defer func() {
+		if err != nil && pdfAuxiliaryError(err) {
+			err = p.recoverPDFObject(p.ctx, "Link", object, err)
+			if err == nil {
+				actions = nil
+				*currentPage = -1
+			}
+		} else if err == nil && (actions == nil || len(p.report.Warnings) != warnings) && len(object) != 0 && p.warning != nil {
+			err = p.preservePDFObject(p.ctx, "Link", object)
+		}
+	}()
+	return p.convertLinkActions(annotation, strict, currentPage)
+}
+
+// convertLinkActions 转换单个动作，由调用方在辅助失败时保留原始来源
+// 入参: annotation 触发注解, strict 严格检查开关, currentPage 动作链当前页
+// 返回: []Action 转换动作, error 动作或读取错误
+func (p *pdfImporter) convertLinkActions(annotation pdfgo.Annotation, strict bool, currentPage *int) ([]Action, error) {
 	value, err := p.reader.Resolve(annotation.Dictionary["A"])
 	if err != nil {
 		return nil, err
@@ -521,6 +563,9 @@ func (p *pdfImporter) linkAction(annotation pdfgo.Annotation, strict bool, curre
 		if destination.Mode == "FitB" {
 			box, err := p.destinationBounds(targetPage)
 			if err != nil {
+				if !pdfAuxiliaryError(err) {
+					return nil, err
+				}
 				if canceled := p.ctx.Err(); canceled != nil {
 					return nil, canceled
 				}
@@ -641,7 +686,7 @@ func (p *pdfImporter) remoteLinkAction(object pdfgo.Object, strict bool) (*Actio
 	}
 	data, err := p.reader.ReadFileData(p.ctx, *action.File, p.resolveFile)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("%w: %w", errPDFMediaRead, err)
 	}
 	id, err := p.attachmentFile(action.File.Name, data)
 	if err != nil {
@@ -19,6 +19,7 @@ import (
 	"crypto/sha256"
 	"errors"
 	"fmt"
+	"maps"
 	"math"
 	"path"
 	"reflect"
@@ -28,6 +29,9 @@ import (
 	"github.com/xiaoqidun/pdfgo"
 )

+// errPDFMediaRead 标识媒体读取失败，避免作为可恢复的导航问题忽略
+var errPDFMediaRead = errors.New("PDF media read failed")
+
 // pdfMediaFileKey 区分媒体文件及注册用途，避免重复解码或调用文件解析器
 type pdfMediaFileKey struct {
 	Stream        *pdfgo.Stream
@@ -59,9 +63,6 @@ type pdfAttachmentKey struct {
 	digest [32]byte
 }

-// errPDFMediaRead 标识媒体读取失败，避免作为可恢复的导航问题忽略
-var errPDFMediaRead = errors.New("PDF media read failed")
-
 // mediaInstance 为播放目标分配独立标识，同一目标的动作继续共用控制状态
 // 入参: id 已注册的媒体资源, target 目标注解, page 所属页面索引
 // 返回: string 独立资源标识, error 资源复制或取消错误
@@ -336,12 +337,39 @@ func (p *pdfImporter) movieAnnotation(ctx context.Context, page *pdfgo.Page, ann
 		return err
 	}
 	movie, err := p.reader.ReadMovie(annotation.Dictionary["Movie"])
+	if err != nil && p.warning != nil && pdfAuxiliaryError(err) {
+		value, resolveErr := p.reader.Resolve(annotation.Dictionary["Movie"])
+		if resolveErr != nil {
+			return resolveErr
+		}
+		if dict, ok := value.(pdfgo.Dictionary); ok && dict["Aspect"] != nil {
+			corrected := maps.Clone(dict)
+			delete(corrected, "Aspect")
+			retry, readErr := p.reader.ReadMovie(corrected)
+			if readErr == nil {
+				if err := p.recoverPDFObject(ctx, "Annotation.Movie", annotation.Dictionary["Movie"], err); err != nil {
+					return err
+				}
+				annotation.Dictionary = maps.Clone(annotation.Dictionary)
+				annotation.Dictionary["Movie"] = corrected
+				movie, err = retry, nil
+			} else if !pdfAuxiliaryError(readErr) {
+				return readErr
+			}
+		}
+	}
 	if err != nil {
-		return err
+		if err := p.recoverAnnotationAuxiliary(ctx, annotation, "Annotation.Movie", annotation.Dictionary["Movie"], err); err != nil {
+			return err
+		}
+		return p.appearanceAnnotation(ctx, page, annotation)
 	}
 	activation, err := p.reader.Resolve(annotation.Dictionary["A"])
 	if err != nil {
-		return err
+		if err := p.recoverAnnotationAuxiliary(ctx, annotation, "Annotation.Movie.A", annotation.Dictionary["A"], err); err != nil {
+			return err
+		}
+		return p.appearanceAnnotation(ctx, page, annotation)
 	}
 	if activation == pdfgo.Boolean(false) {
 		return p.appearanceAnnotation(ctx, page, annotation)
@@ -351,7 +379,10 @@ func (p *pdfImporter) movieAnnotation(ctx context.Context, page *pdfgo.Page, ann
 	}
 	parameters, err := p.reader.ReadMovieActivation(ctx, activation)
 	if err != nil {
-		return err
+		if err := p.recoverAnnotationAuxiliary(ctx, annotation, "Annotation.Movie.A", annotation.Dictionary["A"], err); err != nil {
+			return err
+		}
+		return p.appearanceAnnotation(ctx, page, annotation)
 	}
 	if !pdfMoviePlaybackSupported(movie, parameters) {
 		if err := p.moviePlaybackLoss(ctx, movie.File, strict); err != nil {
@@ -523,7 +554,28 @@ func (p *pdfImporter) movieActionLoss(feature string, strict, retained bool) err
 // 入参: ctx 取消上下文
 // 返回: error 名称树、附件读取或写入错误
 func (p *pdfImporter) documentAttachments(ctx context.Context) error {
-	return p.reader.WalkEmbeddedFiles(ctx, func(_ string, file pdfgo.FileSpecification) error {
+	var original pdfgo.Object
+	if p.warning != nil {
+		names, err := p.pdfCatalogObject("Names")
+		if err != nil {
+			return err
+		}
+		value, err := p.reader.Resolve(names)
+		if err != nil {
+			return p.recoverPDFObject(ctx, "Names", names, err)
+		}
+		if dictionary, ok := value.(pdfgo.Dictionary); ok {
+			original = dictionary["EmbeddedFiles"]
+			if original != nil {
+				if err := p.preservePDFObject(ctx, "EmbeddedFiles", original); err != nil {
+					return err
+				}
+			}
+		} else if value != nil {
+			return p.recoverPDFObject(ctx, "Names", names, fmt.Errorf("invalid names dictionary"))
+		}
+	}
+	err := p.reader.WalkEmbeddedFiles(ctx, func(_ string, file pdfgo.FileSpecification) error {
 		if file.Embedded == nil {
 			if p.warning == nil {
 				return fmt.Errorf("PDF embedded file has no embedded data")
@@ -533,16 +585,23 @@ func (p *pdfImporter) documentAttachments(ctx context.Context) error {
 		}
 		data, err := file.Embedded.DecodeContext(ctx)
 		if err != nil {
-			var unsupported *pdfgo.UnsupportedError
-			if p.warning != nil && errors.As(err, &unsupported) {
-				p.warning(pdfgo.Diagnostic{Message: "PDF document attachment not transferred to OFD: " + err.Error()})
+			if p.warning != nil && pdfAuxiliaryError(err) {
+				p.warning(pdfgo.Diagnostic{Message: "PDF document attachment retained as metadata: " + err.Error()})
 				return nil
 			}
 			return err
 		}
 		_, err = p.attachmentFile(file.Name, data)
+		if err != nil && p.warning != nil && pdfAuxiliaryError(err) {
+			p.warning(pdfgo.Diagnostic{Message: "PDF document attachment retained as metadata: " + err.Error()})
+			return nil
+		}
 		return err
 	})
+	if err != nil {
+		return p.recoverPDFObject(ctx, "EmbeddedFiles", original, err)
+	}
+	return ctx.Err()
 }

 // attachmentFile 按原名及数据复用附件，兼容末尾NUL，缺名使用固定名称