fix(修复问题): 修复编辑缺陷并优化资源回收

assets/webui/ofdgo.js

@@ -5687,6 +5687,7 @@ async function processPageRenderQueue() {
 		}
 	} finally {
 		state.pageRenderRunning = false;
+		if (!state.pageInFlight.size) releasePageResources();
 	}
 }
 

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/tdewolff/canvas v0.0.0-20260923214215-09804640d00c
 	github.com/tdewolff/font v0.0.0-20260913163313-54f98bb59ee6
 	github.com/xiaoqidun/jbig2 v1.1.1
-	github.com/xiaoqidun/pdfgo v0.0.0-20260930050241-ecc0b0d74180
+	github.com/xiaoqidun/pdfgo v0.0.0-20260930062146-7c39a20d9430
 	golang.org/x/crypto v0.57.0
 	golang.org/x/image v0.46.0
 	golang.org/x/text v0.42.0

go.sum

@@ -62,8 +62,8 @@ github.com/tdewolff/test v1.0.12 h1:7F21DqIajswxuche0geHdrUZRCWE4oko4b7bcmkkrxk=
 github.com/tdewolff/test v1.0.12/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
 github.com/xiaoqidun/jbig2 v1.1.1 h1:SjliS9ZO0e9HX5oYUfBuXrfFsXhWricrSz+XY4zORDI=
 github.com/xiaoqidun/jbig2 v1.1.1/go.mod h1:8QonVWtENmh2kc6l+leqeGl7psb79DWlHDkCpdChjfQ=
-github.com/xiaoqidun/pdfgo v0.0.0-20260930050241-ecc0b0d74180 h1:2/QHfh0NIg74xzT3KHjqN7u1S9U2F+4N0HZqPrJFxvw=
-github.com/xiaoqidun/pdfgo v0.0.0-20260930050241-ecc0b0d74180/go.mod h1:4Pf0JO0BEf1uzRY+uZjlMjN/OPn3PYa0YMi6cqPPTLQ=
+github.com/xiaoqidun/pdfgo v0.0.0-20260930062146-7c39a20d9430 h1:UBP+ZmqxoxQ7p6dFZI/6yGSLmgqfTQUvO7h+DUfWsWY=
+github.com/xiaoqidun/pdfgo v0.0.0-20260930062146-7c39a20d9430/go.mod h1:4Pf0JO0BEf1uzRY+uZjlMjN/OPn3PYa0YMi6cqPPTLQ=
 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=

internal/webui/wasm.go

@@ -83,9 +83,8 @@ type apiResult struct {
 // editorClipboard 当前编辑文档中的对象快照与剪贴板标识
 type editorClipboard struct {
 	token     string
-	objects     []ofdgo.GraphicObject
+	selection *ofdgo.ObjectSelection
 	composite *ofdgo.CompositeSelection
-	annotations *ofdgo.AnnotationSelection
 }
 
 // editorInfo 编辑文档信息与操作状态
@@ -1669,10 +1668,7 @@ func captureEditorSelection(page int, ids []string) (*editorClipboard, error) {
 	objects, annotations := splitEditorSelection(ids)
 	result := &editorClipboard{}
 	var err error
-	result.objects, err = currentEditor.Objects(page, objects)
-	if err == nil && len(annotations) != 0 {
-		result.annotations, err = currentEditor.CaptureAnnotations(page, annotations)
-	}
+	result.selection, err = currentEditor.CaptureSelection(page, objects, annotations)
 	return result, err
 }
 
@@ -1680,24 +1676,10 @@ func captureEditorSelection(page int, ids []string) (*editorClipboard, error) {
 // 入参: page 目标页, clipboard 快照, dx、dy 位移
 // 返回: []string 新画布标识, error 错误信息
 func pasteEditorSelection(page int, clipboard *editorClipboard, dx, dy float64) ([]string, error) {
-	var ids []string
-	err := currentEditor.Transaction(func(edit *ofdgo.Editor) error {
-		var err error
-		ids, err = edit.CopyObjects(page, clipboard.objects, dx, dy)
-		if err != nil {
-			return err
-		}
-		if clipboard.annotations != nil {
-			annotations, err := edit.PasteAnnotations(page, clipboard.annotations, dx, dy)
-			if err != nil {
-				return err
-			}
+	ids, annotations, err := currentEditor.PasteSelection(page, clipboard.selection, dx, dy)
 	for _, id := range annotations {
 		ids = append(ids, "annotation:"+id)
 	}
-		}
-		return nil
-	})
 	return ids, err
 }
 
@@ -2677,9 +2659,6 @@ func pasteObjects(args []js.Value) (any, error) {
 	}
 	page, dx, dy := args[0].Int(), args[2].Float(), args[3].Float()
 	if key != "" {
-		if copiedObjects.annotations != nil {
-			return nil, fmt.Errorf("annotations cannot be nested in a page object")
-		}
 		path, err := compositePath(key)
 		if err != nil {
 			return nil, err
@@ -2688,7 +2667,7 @@ func pasteObjects(args []js.Value) (any, error) {
 		if copiedObjects.composite != nil {
 			indexes, err = currentEditor.PasteCompositeObjects(page, path, copiedObjects.composite, dx, dy)
 		} else {
-			indexes, err = currentEditor.CopyObjectsToComposite(page, path, copiedObjects.objects, dx, dy)
+			indexes, err = currentEditor.PasteSelectionToComposite(page, path, copiedObjects.selection, dx, dy)
 		}
 		if err != nil {
 			return nil, err

ofdgo_editor_annot_ops.go

@@ -19,7 +19,6 @@ import (
 	"encoding/xml"
 	"fmt"
 	"maps"
-	"slices"
 )
 
 // AnnotationSelection 保存当前编辑器内可重复粘贴的注解原文及资源上下文
@@ -151,10 +150,18 @@ func (e *Editor) PasteAnnotations(page int, selection *AnnotationSelection, dx,
 				return err
 			}
 			common := root.child("CommonData")
+			registered := make(map[string]bool)
+			for _, name := range edit.source.document.CommonData.PublicRes {
+				registered[reader.ResPath(name)] = true
+			}
+			for _, name := range edit.source.document.CommonData.DocumentRes {
+				registered[reader.ResPath(name)] = true
+			}
 			var added []byte
 			for _, name := range selection.resources {
-				if !slices.ContainsFunc(append(slices.Clone(edit.source.document.CommonData.PublicRes), edit.source.document.CommonData.DocumentRes...), func(value string) bool { return reader.ResPath(value) == name }) {
+				if !registered[name] {
 					added = append(added, editorXMLText("DocumentRes", "/"+name)...)
+					registered[name] = true
 				}
 			}
 			if len(added) != 0 {

ofdgo_editor_attachment.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"maps"
 	"path"
+	"strconv"
 	"strings"
 	"unicode/utf8"
 )
@@ -40,18 +41,18 @@ func (e *Editor) AddAttachment(name string, data []byte) (string, error) {
 	if err := validateAttachmentName(name); err != nil {
 		return "", err
 	}
-	if err := e.prepareSourceIDs(); err != nil {
+	maximum, err := e.sourceMaxID(nil)
+	if err != nil {
 		return "", err
 	}
 	base := e.source
-	var err error
 	if base == nil {
 		base, err = e.importBase()
 		if err != nil {
 			return "", err
 		}
 	}
-	id := e.nextID()
+	id := strconv.Itoa(maximum + 1)
 	file := e.packageName("Attachments/Attachment_" + id)
 	attrs := ofdAttrs{}
 	attrs.add("ID", id)
@@ -112,6 +113,7 @@ func (e *Editor) AddAttachment(name string, data []byte) (string, error) {
 	if err := e.commitAnnotationParts(base, parts); err != nil {
 		return "", err
 	}
+	e.maxID, e.source.idsReady = maximum+1, true
 	return id, nil
 }
 
@@ -134,11 +136,14 @@ func (e *Editor) RenameAttachment(id, name string) error {
 // 入参: id 附件标识, data 文件数据，调用后可复用
 // 返回: error 附件结构或提交错误
 func (e *Editor) ReplaceAttachment(id string, data []byte) error {
-	return e.editAttachment(id, func(fragment []byte, node *editorXML, parts map[string][]byte) ([]byte, error) {
-		if err := e.prepareSourceIDs(); err != nil {
+	var maximum int
+	err := e.editAttachment(id, func(fragment []byte, node *editorXML, parts map[string][]byte) ([]byte, error) {
+		var err error
+		maximum, err = e.sourceMaxID(nil)
+		if err != nil {
 			return nil, err
 		}
-		file := e.packageName("Attachments/Attachment_" + e.nextID())
+		file := e.packageName("Attachments/Attachment_" + strconv.Itoa(maximum+1))
 		var location bytes.Buffer
 		if err := xml.EscapeText(&location, []byte("/"+file)); err != nil {
 			return nil, err
@@ -161,6 +166,11 @@ func (e *Editor) ReplaceAttachment(id string, data []byte) error {
 		parts[file] = bytes.Clone(data)
 		return fragment, nil
 	})
+	if err != nil {
+		return err
+	}
+	e.maxID, e.source.idsReady = maximum+1, true
+	return nil
 }
 
 // DeleteAttachment 删除附件声明，保存时清理可确认无引用的内容，支持撤销和重做

ofdgo_editor_batch.go

@@ -212,10 +212,15 @@ func (e *Editor) OrderObjects(page int, ids []string, order string) error {
 	}
 	layer := &e.pages[page].Content.Layer[indexes[0].layer]
 	_, siblings := e.objectOrderIndexes(page, layer, ids[0])
+	positions := make(map[int]int, len(siblings))
+	for i, index := range siblings {
+		positions[index] = i
+	}
 	orderable := make(map[*editorXML]bool)
 	for i, object := range selectedObjects {
 		capability := e.objectCapabilities(object, orderable)
-		if !capability.Order || indexes[i].layer != indexes[0].layer || !slices.Contains(siblings, indexes[i].index) {
+		_, exists := positions[indexes[i].index]
+		if !capability.Order || indexes[i].layer != indexes[0].layer || !exists {
 			return fmt.Errorf("ordering requires editable objects in the same container")
 		}
 	}
@@ -226,7 +231,7 @@ func (e *Editor) OrderObjects(page int, ids []string, order string) error {
 	}
 	selected := make([]bool, len(objects))
 	for _, index := range indexes {
-		selected[slices.Index(siblings, index.index)] = true
+		selected[positions[index.index]] = true
 	}
 	orderEditorObjects(objects, selected, order)
 	for i, index := range siblings {
@@ -507,11 +512,17 @@ func editorDistribution(boxes []Box, indexes []editorObjectPosition, axis string
 // replaceLayers 替换图层容器，隔离历史快照与后续的增删、排序操作
 // 入参: page 页面索引, layers 新图层列表
 func (e *Editor) replaceLayers(page int, layers []Layer) {
-	before := copyEditorPage(e.pages[page]).Content.Layer
+	before := e.pages[page].Content.Layer
 	if reflect.DeepEqual(before, layers) {
 		return
 	}
 	after := copyEditorPage(PageContent{Content: Content{Layer: layers}}).Content.Layer
+	if e.historyLimit == 0 {
+		e.pages[page].Content.Layer = after
+		e.recordChange()
+		return
+	}
+	before = copyEditorPage(PageContent{Content: Content{Layer: before}}).Content.Layer
 	apply := func(e *Editor, layers []Layer) {
 		e.pages[page].Content.Layer = copyEditorPage(PageContent{Content: Content{Layer: layers}}).Content.Layer
 	}

ofdgo_editor_selection_copy.go

@@ -0,0 +1,78 @@
+// 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 ofdgo
+
+import "fmt"
+
+// 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
+// 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
+	objects     []GraphicObject
+	annotations *AnnotationSelection
+}
+
+// CaptureSelection 捕获正文与注解，不修改文档或历史
+// 入参: page 页面索引, objects 正文标识, annotations 注解标识，各列表不得重复
+// 返回: *ObjectSelection 独立快照, error 标识或资源错误
+func (e *Editor) CaptureSelection(page int, objects, annotations []string) (*ObjectSelection, error) {
+	items, err := e.Objects(page, objects)
+	if err != nil {
+		return nil, err
+	}
+	selection := &ObjectSelection{editor: e, objects: items}
+	if len(annotations) != 0 {
+		selection.annotations, err = e.CaptureAnnotations(page, annotations)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return selection, nil
+}
+
+// PasteSelection 原子粘贴正文与注解并平移，失败回滚，一次撤销恢复全部
+// 入参: page 目标页面索引, selection 当前编辑器快照, dx、dy 页面毫米位移
+// 返回: []string 新正文标识, []string 新注解标识, error 标识、资源或编辑错误
+func (e *Editor) PasteSelection(page int, selection *ObjectSelection, dx, dy float64) ([]string, []string, error) {
+	if selection == nil || selection.editor != e || !finite(dx) || !finite(dy) {
+		return nil, nil, fmt.Errorf("invalid object selection or offset")
+	}
+	var objects, annotations []string
+	err := e.Transaction(func(edit *Editor) error {
+		var err error
+		objects, err = edit.CopyObjects(page, selection.objects, dx, dy)
+		if err == nil && selection.annotations != nil {
+			annotations, err = edit.PasteAnnotations(page, selection.annotations, dx, dy)
+		}
+		return err
+	})
+	if err != nil {
+		return nil, nil, err
+	}
+	return objects, annotations, nil
+}
+
+// PasteSelectionToComposite 将正文快照粘贴至内部容器，保留源外观，拒绝嵌套注解
+// 入参: page 目标页面索引, path 父复合路径, selection 当前编辑器快照, dx、dy 页面毫米位移
+// 返回: []int 新成员序号, error 选区、资源或编辑错误
+func (e *Editor) PasteSelectionToComposite(page int, path ObjectPath, selection *ObjectSelection, dx, dy float64) ([]int, error) {
+	if selection == nil || selection.editor != e {
+		return nil, fmt.Errorf("object selection belongs to another editor")
+	}
+	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)
+}