feat(编辑能力): 新增字体搜索与按需裁剪，完善重叠选择和页块排序

assets/webui/index.html

@@ -100,7 +100,8 @@
 				<span>插入</span>
 			</div>
 			<div class="editor-group">
-				<div class="text-font"><select id="textFont" aria-label="字体" title="字体" disabled></select><button id="textFontAdd" class="icon-button" type="button" title="添加字体" aria-label="添加字体">+</button></div>
+				<div class="text-font"><div class="font-picker"><input id="textFont" type="text" role="combobox" aria-label="字体" title="字体" aria-autocomplete="list" aria-controls="textFontList" aria-expanded="false" autocomplete="off" spellcheck="false" disabled><button id="textFontToggle" type="button" title="选择字体" aria-label="选择字体" tabindex="-1" disabled></button></div><button id="textFontAdd" class="icon-button" type="button" title="添加字体" aria-label="添加字体">+</button></div>
+				<div id="textFontList" class="font-listbox" role="listbox" aria-label="字体列表" popover="manual"></div>
 				<div class="editor-number"><input id="textSize" type="number" min="1" step="any" required aria-label="字号" disabled><span>pt</span></div>
 				<input id="textColor" class="color-input" type="color" value="#000000" aria-label="文字颜色" title="文字颜色" disabled>
 				<span>文字</span>

assets/webui/ofdgo.css

@@ -208,6 +208,78 @@ a:focus-visible {
 	min-width: 0;
 }
 
+.font-picker {
+	display: flex;
+	min-width: 0;
+	height: var(--control-height);
+	border: 1px solid var(--line);
+	background: #fff;
+}
+
+.font-picker #textFont {
+	padding: 0 6px;
+	border: 0;
+	outline: 0;
+	background: transparent;
+	color: #1f2428;
+}
+
+.font-picker:focus-within {
+	outline: 2px solid var(--focus);
+	outline-offset: 2px;
+}
+
+#textFontToggle {
+	width: 24px;
+	min-width: 24px;
+	padding: 0;
+	border: 0;
+}
+
+#textFontToggle::after {
+	content: "";
+	display: inline-block;
+	width: 6px;
+	height: 6px;
+	border-right: 1px solid currentColor;
+	border-bottom: 1px solid currentColor;
+	transform: translateY(-2px) rotate(45deg);
+}
+
+.font-listbox {
+	position: fixed;
+	margin: 0;
+	padding: 4px;
+	border: 1px solid var(--line);
+	background: var(--panel);
+	color: #1f2428;
+	box-shadow: 0 5px 18px rgba(20, 40, 50, 0.14);
+	overflow-y: auto;
+	font-size: 14px;
+}
+
+.font-listbox [role="option"] {
+	padding: 6px 8px;
+	line-height: 1.4;
+	overflow-wrap: anywhere;
+	cursor: pointer;
+}
+
+.font-listbox [role="option"]:hover,
+.font-listbox [aria-selected="true"] {
+	background: var(--accent-soft);
+	color: var(--accent);
+}
+
+.font-listbox [aria-disabled="true"],
+.font-search-empty {
+	color: var(--text-muted);
+}
+
+.font-search-empty {
+	padding: 6px 8px;
+}
+
 #textColor {
 	width: 100%;
 }

assets/webui/ofdgo.js

@@ -1,5 +1,5 @@
 import { CanvasEditor, canEditObject, objectEditReason } from "./ofdgo_edit.js";
-import { FontManager } from "./ofdgo_font.js";
+import { FontManager, FontPicker } from "./ofdgo_font.js";
 
 const MM_TO_PX = 96 / 25.4;
 const COMPACT_LAYOUT = window.matchMedia("(max-width: 900px)");
@@ -109,6 +109,8 @@ const el = {
 	textLineHeight: document.querySelector("#textLineHeight"),
 	textSpacing: document.querySelector("#textSpacing"),
 	textFont: document.querySelector("#textFont"),
+	textFontToggle: document.querySelector("#textFontToggle"),
+	textFontList: document.querySelector("#textFontList"),
 	textFontAdd: document.querySelector("#textFontAdd"),
 	textSize: document.querySelector("#textSize"),
 	textColor: document.querySelector("#textColor"),
@@ -244,9 +246,11 @@ const fontManager = new FontManager({
 	onChange: scheduleFontSync,
 	onPermissionChange: updateFontPermissionHint,
 });
+const fontPicker = new FontPicker(el.textFont, el.textFontToggle, el.textFontList, changeTextFont);
+el.editorTools.addEventListener("scroll", () => fontPicker.position());
 
 const canvasEditor = new CanvasEditor(el.viewerPanel, {
-	fontControls: [el.textFont, el.textFontAdd],
+	fontControls: [el.textFont, el.textFontToggle, el.textFontAdd],
 	busy: () => document.body.hasAttribute("aria-busy"),
 	rotation: () => state.rotation,
 	canInsert: (index) => pageCan("insert", index),
@@ -341,7 +345,6 @@ editorClick(el.textWrap, () => changeParagraph(!currentTextStyle().wrap));
 el.textAlign.addEventListener("change", () => changeParagraph());
 el.textLineHeight.addEventListener("change", () => changeParagraph());
 el.textSpacing.addEventListener("change", () => changeParagraph());
-el.textFont.addEventListener("change", changeTextFont);
 el.shapeWidth.addEventListener("focus", () => { el.shapeWidth.defaultValue = el.shapeWidth.value; });
 for (const input of [el.textSize, el.shapeWidth, el.textLineHeight, el.textSpacing]) {
 	input.addEventListener("keydown", (event) => {
@@ -942,7 +945,7 @@ async function toggleTextTool() {
 	}
 	if (openSeq !== state.openSeq) return;
 	const style = canEditObject(canvasEditor.selected, "layoutKnown") ? currentTextStyle() : state.textDefaults;
-	const font = state.textFonts[Number(el.textFont.value)];
+	const font = state.textFonts[Number(fontPicker.value)];
 	state.textDefaults = { type: "TextObject", size: style.size, color: style.color, wrap: style.wrap,
 		align: style.align || "left", paragraphHeight: style.paragraphHeight || 0, letterSpacing: style.letterSpacing || 0,
 		fontChoice: font && !font.disabled ? font : state.textDefaults.fontChoice };
@@ -953,7 +956,7 @@ async function toggleTextTool() {
 }
 
 async function beginCanvasText(index, box, surface, page) {
-	const font = state.textDefaults.fontChoice || state.textFonts[Number(el.textFont.value)];
+	const font = state.textDefaults.fontChoice || state.textFonts[Number(fontPicker.value)];
 	if (!font || font.disabled) {
 		setStatus("尚未添加字体");
 		el.textFontAdd.focus();
@@ -984,19 +987,6 @@ function editorFonts(item) {
 	return fonts;
 }
 
-function setFontOptions(select, fonts, selected) {
-	const key = (font) => font?.id || font?.postscriptName;
-	select.replaceChildren();
-	fonts.forEach((font, index) => {
-		const option = document.createElement("option");
-		option.value = String(index);
-		option.textContent = font.fullName || font.name;
-		option.disabled = Boolean(font.disabled);
-		select.append(option);
-	});
-	select.value = fonts.length ? String(Math.max(0, fonts.findIndex(font => key(font) === key(selected)))) : "";
-}
-
 function updateTextFonts(item, refresh = false) {
 	const id = item?.type === "TextObject" && !item.draft ? item.font : null;
 	if (refresh || state.textFontID !== id) {
@@ -1007,14 +997,14 @@ function updateTextFonts(item, refresh = false) {
 			&& !state.textFonts.some(font => (font.id || font.postscriptName) === (selected.id || selected.postscriptName))) {
 			state.textFonts.unshift(selected);
 		}
-		setFontOptions(el.textFont, state.textFonts, selected || state.textFonts[0]);
-		if (!id) state.textDefaults.fontChoice = state.textFonts[Number(el.textFont.value)];
+		fontPicker.setFonts(state.textFonts, selected || state.textFonts[0]);
+		if (!id) state.textDefaults.fontChoice = state.textFonts[Number(fontPicker.value)];
 	}
 }
 
 async function changeTextFont() {
 	const item = canvasEditor.selected;
-	const font = state.textFonts[Number(el.textFont.value)];
+	const font = state.textFonts[Number(fontPicker.value)];
 	if (!state.ready || document.body.hasAttribute("aria-busy") || !font || font.disabled) return;
 	const editing = canvasEditor.input;
 	if (editing) {
@@ -2992,7 +2982,7 @@ async function pasteEditorContent(event) {
 	}
 	const value = event.clipboardData.getData("text/plain").replace(/\t/g, "    ");
 	if (!value.trim()) return;
-	const font = state.textFonts[Number(el.textFont.value)];
+	const font = state.textFonts[Number(fontPicker.value)];
 	if (!font || font.disabled) {
 		setStatus("尚未添加字体");
 		el.textFontAdd.focus();
@@ -4459,7 +4449,7 @@ function updateObjectControls(item, reset = false) {
 	el.multiSelectButton.disabled = !state.editing || !canvasEditor.enabled || !state.ready || state.exporting;
 	const text = item?.type === "TextObject" ? item : state.textDefaults;
 	const textDisabled = !state.editing || !state.ready || state.exporting || Boolean(item?.items);
-	el.textFont.disabled = textDisabled || text !== state.textDefaults && !item.draft && !canEditObject(item, "replaceFont");
+	fontPicker.setDisabled(textDisabled || text !== state.textDefaults && !item.draft && !canEditObject(item, "replaceFont"));
 	el.textSize.disabled = textDisabled || Boolean(item?.draft) || text !== state.textDefaults && !canEditObject(item, "reflow");
 	el.textColor.disabled = textDisabled || Boolean(item?.draft) || text !== state.textDefaults && !canEditObject(item, "update");
 	el.textFontAdd.disabled = !state.editing || !state.ready || state.exporting;
@@ -4495,12 +4485,12 @@ function updateObjectControls(item, reset = false) {
 	}
 	updateDrawingControls();
 	const members = item?.items || (item ? [item] : []);
-	const orders = members.map(member => member.order).sort((a, b) => a - b);
+	const orders = members.map(member => member.position).sort((a, b) => a - b);
 	const count = members[0]?.count || 0;
 	const canRaise = orders.some((order, i) => order !== count - orders.length + i);
 	const canLower = orders.some((order, i) => order !== i);
 	el.objectOrder.disabled = disabled || cropping || count <= orders.length || !canEditObject(item, "order")
-		|| members.some(member => member.layer !== members[0].layer);
+		|| members.some(member => member.container !== members[0].container);
 	for (const option of el.objectOrder.options) {
 		option.disabled = el.objectOrder.disabled || (["up", "top"].includes(option.value) ? !canRaise : !canLower);
 	}

assets/webui/ofdgo_edit.js

@@ -156,9 +156,9 @@ export class CanvasEditor {
 		viewer.addEventListener("lostpointercapture", () => this.cancel());
 		viewer.addEventListener("keydown", (event) => this.keyDown(event));
 		viewer.addEventListener("keyup", (event) => this.modifierChange(event));
-		viewer.addEventListener("dblclick", () => {
+		viewer.addEventListener("dblclick", (event) => {
 			const item = this.selected;
-			if (this.enabled && item && !item.items && !this.input && !this.options.busy()) {
+			if (!event.altKey && this.enabled && item && !item.items && !this.input && !this.options.busy()) {
 				this.options.onEdit(item);
 			}
 		});
@@ -361,6 +361,10 @@ export class CanvasEditor {
 			this.startShape(event);
 			return;
 		}
+		if (event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey && !event.target.dataset.corner) {
+			this.cycleSelection(event);
+			return;
+		}
 		const node = event.target.closest(".edit-object, .edit-selection");
 		if (node) {
 			event.preventDefault();
@@ -401,6 +405,19 @@ export class CanvasEditor {
 		this.viewer.setPointerCapture(event.pointerId);
 	}
 
+	cycleSelection(event) {
+		const surface = event.target.closest(".page-surface");
+		const page = this.pages.get(surface);
+		if (!page) return;
+		const point = pagePoint(event.clientX, event.clientY, surface.getBoundingClientRect(), page, this.options.rotation());
+		const items = [...surface.querySelectorAll(".edit-object")].map(node => this.nodes.get(node)).reverse()
+			.filter(item => point.x >= item.x && point.x <= item.x + item.width && point.y >= item.y && point.y <= item.y + item.height);
+		if (!items.length) return;
+		event.preventDefault();
+		this.viewer.focus({ preventScroll: true });
+		this.select(items[(items.indexOf(this.selected) + 1) % items.length]);
+	}
+
 	move(event) {
 		const drag = this.drag;
 		if (!drag || drag.pointerID !== event.pointerId) {

assets/webui/ofdgo_font.js

@@ -1,5 +1,141 @@
 const DATABASE = "ofdgo";
 
+export class FontPicker {
+	constructor(input, toggle, list, onChange) {
+		Object.assign(this, { input, toggle, list, onChange, fonts: [], 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("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(); }
+		});
+		list.addEventListener("pointerdown", event => {
+			if (event.target.closest("[role=option]")) event.preventDefault();
+		});
+		list.addEventListener("click", event => {
+			const option = event.target.closest("[role=option]");
+			if (option) this.choose(Number(option.dataset.index));
+		});
+		window.addEventListener("resize", () => this.close());
+	}
+
+	setFonts(fonts, selected) {
+		this.close();
+		this.fonts = fonts;
+		const key = font => font?.id || font?.postscriptName;
+		this.value = fonts.length ? String(Math.max(0, fonts.findIndex(font => key(font) === key(selected)))) : "";
+		this.restore();
+	}
+
+	setDisabled(disabled) {
+		this.input.disabled = this.toggle.disabled = disabled;
+		if (disabled) this.close();
+	}
+
+	restore() {
+		const font = this.fonts[Number(this.value)];
+		this.input.value = font?.fullName || font?.name || "";
+		this.input.setAttribute("aria-expanded", String(this.open));
+		this.input.removeAttribute("aria-activedescendant");
+	}
+
+	show(query = "") {
+		if (this.input.disabled) return;
+		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.postscriptName].filter(Boolean).join(" "));
+			return terms.every(term => name.includes(term));
+		});
+		this.list.replaceChildren();
+		for (const { font, index } of this.matches) {
+			const option = document.createElement("div");
+			option.id = `${this.list.id}-${index}`;
+			option.dataset.index = String(index);
+			option.setAttribute("role", "option");
+			option.setAttribute("aria-disabled", String(Boolean(font.disabled)));
+			option.textContent = font.fullName || font.name;
+			this.list.append(option);
+		}
+		if (!this.matches.length) {
+			const empty = document.createElement("div");
+			empty.className = "font-search-empty";
+			empty.textContent = "无匹配字体";
+			this.list.append(empty);
+		}
+		if (!this.open) this.list.showPopover();
+		this.open = true;
+		this.input.setAttribute("aria-expanded", "true");
+		this.position();
+		const selected = this.matches.findIndex(({ font, index }) => !font.disabled && String(index) === this.value);
+		this.activate(selected < 0 ? this.matches.findIndex(({ font }) => !font.disabled) : selected);
+	}
+
+	position() {
+		if (!this.open) return;
+		const rect = this.input.getBoundingClientRect();
+		if (rect.right <= 0 || rect.left >= window.innerWidth) { this.close(); return; }
+		const width = Math.min(Math.max(rect.width, 260), window.innerWidth - 16);
+		Object.assign(this.list.style, { left: `${Math.max(8, Math.min(rect.left, window.innerWidth - width - 8))}px`,
+			top: `${rect.bottom + 4}px`, width: `${width}px`, maxHeight: `${Math.max(40, Math.min(280, window.innerHeight - rect.bottom - 12))}px` });
+	}
+
+	activate(index) {
+		this.active = index;
+		[...this.list.children].forEach((option, i) => option.setAttribute("aria-selected", String(i === index)));
+		const option = this.list.children[index];
+		if (option) {
+			this.input.setAttribute("aria-activedescendant", option.id);
+			option.scrollIntoView({ block: "nearest" });
+		} else this.input.removeAttribute("aria-activedescendant");
+	}
+
+	choose(index) {
+		if (!this.fonts[index] || this.fonts[index].disabled) return;
+		const changed = this.value !== String(index);
+		this.value = String(index);
+		this.close();
+		if (changed) return this.onChange();
+	}
+
+	commitExact() {
+		const value = this.input.value.trim().toLocaleLowerCase();
+		const index = this.fonts.findIndex(font => !font.disabled
+			&& [font.fullName, font.name, font.postscriptName].some(name => name?.toLocaleLowerCase() === value));
+		if (index >= 0) this.choose(index);
+	}
+
+	close() {
+		if (this.open) { this.open = false; this.list.hidePopover(); }
+		this.restore();
+	}
+
+	keyDown(event) {
+		if (event.isComposing) return;
+		if (!["Escape", "Enter", "ArrowDown", "ArrowUp", "Tab"].includes(event.key)) return;
+		event.stopPropagation();
+		if (event.key === "Escape") {
+			event.preventDefault();
+			this.close();
+		} else if (event.key === "Enter") {
+			event.preventDefault();
+			if (this.open && this.active >= 0) this.choose(this.matches[this.active].index);
+			else { this.commitExact(); this.close(); }
+		} else if (event.key === "ArrowDown" || event.key === "ArrowUp") {
+			event.preventDefault();
+			if (!this.open) { this.show(); return; }
+			const direction = event.key === "ArrowDown" ? 1 : -1;
+			for (let i = this.active + direction; i >= 0 && i < this.matches.length; i += direction) {
+				if (!this.matches[i].font.disabled) { this.activate(i); break; }
+			}
+		} else if (event.key === "Tab") { this.commitExact(); this.close(); }
+	}
+}
+
 export class FontManager {
 	constructor({ onChange, onPermissionChange }) {
 		this.userFonts = [];

internal/webui/wasm.go

@@ -662,7 +662,11 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 				continue
 			}
 			if box.W > 0 && box.H > 0 {
-				item := map[string]any{"id": id, "type": object.Type, "x": box.X, "y": box.Y, "width": box.W, "height": box.H, "order": order, "count": len(layer.Objects), "layer": layer.ID,
+				position, err := currentEditor.ObjectPosition(index, id)
+				if err != nil {
+					return nil, err
+				}
+				item := map[string]any{"id": id, "type": object.Type, "x": box.X, "y": box.Y, "width": box.W, "height": box.H, "order": order, "position": position.Index, "count": position.Count, "container": position.Container,
 					"capabilities": map[string]any{"update": capability.Update, "replaceFont": capability.ReplaceFont, "reflow": capability.Reflow, "layoutKnown": capability.LayoutKnown, "transform": capability.Transform, "arrange": capability.Arrange, "copy": capability.Copy, "delete": capability.Delete, "order": capability.Order, "reason": capability.Reason}}
 				if object.Type == "ImageObject" && capability.Update {
 					full, err := object.ImageObject.ImageBounds()

ofdgo_editor.go

@@ -428,15 +428,17 @@ func (e *Editor) DeleteObject(page int, id string) error {
 	return e.DeleteObjects(page, []string{id})
 }
 
-// MoveObject 调整同页正文图层内的绘制顺序，保留对象标识和内容
-// 入参: page 页面索引, id 对象标识, to 移动后的对象索引，0为最底层，末尾为最顶层
+// MoveObject 调整同一图层或末级页块内的绘制顺序，保留对象标识和内容
+// 入参: page 页面索引, id 对象标识, to 直接容器内的对象索引，0为最底层，末尾为最顶层
 // 返回: error 错误信息
 func (e *Editor) MoveObject(page int, id string, to int) error {
 	layer, from, err := e.findObject(page, id)
 	if err != nil {
 		return err
 	}
-	if to < 0 || to >= len(layer.Objects) {
+	_, siblings := e.objectOrderIndexes(page, layer, id)
+	from = slices.Index(siblings, from)
+	if to < 0 || to >= len(siblings) {
 		return fmt.Errorf("object index %d out of range", to)
 	}
 	if from == to {
@@ -452,7 +454,14 @@ func (e *Editor) MoveObject(page int, id string, to int) error {
 	layers := copyEditorPage(e.pages[page]).Content.Layer
 	for i := range layers {
 		if layers[i].ID == layer.ID {
-			moveEditorItem(layers[i].Objects, from, to)
+			objects := make([]GraphicObject, len(siblings))
+			for j, index := range siblings {
+				objects[j] = layer.Objects[index]
+			}
+			moveEditorItem(objects, from, to)
+			for j, index := range siblings {
+				layers[i].Objects[index] = objects[j]
+			}
 		}
 	}
 	e.replaceLayers(page, layers)

ofdgo_editor_batch.go

@@ -132,7 +132,59 @@ func (e *Editor) CopyObjects(page int, objects []GraphicObject, dx, dy float64)
 	return result, nil
 }
 
-// OrderObjects 调整同页选区的绘制顺序，保留选中及未选中对象各自的相对顺序。
+// 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
+	Container string
+	Index     int
+	Count     int
+}
+
+// ObjectPosition 获取对象的直接容器及排序位置。
+// 入参: page 页面索引, id 对象标识
+// 返回: ObjectPosition 对象位置, error 错误信息
+func (e *Editor) ObjectPosition(page int, id string) (ObjectPosition, error) {
+	layer, _, err := e.findObject(page, id)
+	if err != nil {
+		return ObjectPosition{}, err
+	}
+	parent, indexes := e.objectOrderIndexes(page, layer, id)
+	position := ObjectPosition{Layer: layer.ID, Container: layer.ID, Count: len(indexes)}
+	if parent != nil {
+		position.Container = parent.attr("ID")
+	}
+	for i, index := range indexes {
+		if editorObjectID(layer.Objects[index]) == id {
+			position.Index = i
+			break
+		}
+	}
+	return position, nil
+}
+
+// objectOrderIndexes 获取同一直接容器的对象索引，不跨越图层或页块。
+// 入参: page 页面索引, layer 图层, id 对象标识
+// 返回: *editorXML 原始容器, []int 对象索引
+func (e *Editor) objectOrderIndexes(page int, layer *Layer, id string) (*editorXML, []int) {
+	var nodes map[string]*editorXML
+	var parent *editorXML
+	if e.originalPage(page) {
+		nodes = e.source.pages[e.pages[page].ID].nodes
+		if node := nodes[id]; node != nil {
+			parent = node.parent
+		}
+	}
+	var indexes []int
+	for i, object := range layer.Objects {
+		node := nodes[editorObjectID(object)]
+		if node == nil && parent == nil || node != nil && node.parent == parent {
+			indexes = append(indexes, i)
+		}
+	}
+	return parent, indexes
+}
+
+// OrderObjects 调整同一图层或页块内选区的绘制顺序，保留各组选中及未选中对象的相对顺序。
 // 入参: page 页面索引, ids 对象标识, order 为up、down、top或bottom
 // 返回: error 错误信息
 func (e *Editor) OrderObjects(page int, ids []string, order string) error {
@@ -143,20 +195,25 @@ func (e *Editor) OrderObjects(page int, ids []string, order string) error {
 	if err != nil || len(indexes) == 0 {
 		return err
 	}
+	layer := &e.pages[page].Content.Layer[indexes[0].layer]
+	_, siblings := e.objectOrderIndexes(page, layer, ids[0])
 	for i, id := range ids {
 		capability, err := e.ObjectCapabilities(page, id)
 		if err != nil {
 			return err
 		}
-		if !capability.Order || indexes[i].layer != indexes[0].layer {
-			return fmt.Errorf("ordering requires editable objects in the same layer")
+		if !capability.Order || indexes[i].layer != indexes[0].layer || !slices.Contains(siblings, indexes[i].index) {
+			return fmt.Errorf("ordering requires editable objects in the same container")
 		}
 	}
 	layers := copyEditorPage(e.pages[page]).Content.Layer
-	objects := layers[indexes[0].layer].Objects
+	objects := make([]GraphicObject, len(siblings))
+	for i, index := range siblings {
+		objects[i] = layer.Objects[index]
+	}
 	selected := make([]bool, len(objects))
 	for _, index := range indexes {
-		selected[index.index] = true
+		selected[slices.Index(siblings, index.index)] = true
 	}
 	switch order {
 	case "up":
@@ -184,7 +241,9 @@ func (e *Editor) OrderObjects(page int, ids []string, order string) error {
 		}
 		objects = ordered
 	}
-	layers[indexes[0].layer].Objects = objects
+	for i, index := range siblings {
+		layers[indexes[0].layer].Objects[index] = objects[i]
+	}
 	e.replaceLayers(page, layers)
 	return nil
 }

ofdgo_editor_font.go

@@ -0,0 +1,97 @@
+// 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 (
+	"bytes"
+	"fmt"
+	"slices"
+
+	"github.com/tdewolff/font"
+)
+
+// subsetFonts 收集新增字体实际使用的字形，仅裁剪保存结果，不修改编辑资源或原文档字体。
+// 返回: map[string][]byte 包内字体子集, error 错误信息
+func (e *Editor) subsetFonts() (map[string][]byte, error) {
+	used := make(map[string]map[uint16]bool)
+	for _, resource := range e.resources {
+		if resource.font == nil {
+			continue
+		}
+		sfnt := e.fonts[resource.font.ID]
+		if sfnt.IsTrueType && !slices.ContainsFunc([]string{"fvar", "COLR", "CBDT", "sbix", "SVG "}, func(tag string) bool { return sfnt.Tables[tag] != nil }) {
+			used[resource.font.ID] = make(map[uint16]bool)
+		}
+	}
+	for _, page := range e.pages {
+		for _, layer := range page.Content.Layer {
+			for _, object := range layer.Objects {
+				if object.Type != "TextObject" {
+					continue
+				}
+				obj := object.TextObject
+				glyphs := used[obj.Font]
+				if glyphs == nil {
+					continue
+				}
+				for _, code := range obj.TextCode {
+					for _, char := range textCodeRunes(code.Value) {
+						glyphs[e.fonts[obj.Font].GlyphIndex(char)] = true
+					}
+				}
+			}
+		}
+	}
+	result := make(map[string][]byte)
+	for _, resource := range e.resources {
+		if resource.font == nil || len(used[resource.font.ID]) == 0 {
+			continue
+		}
+		glyphs := used[resource.font.ID]
+		glyphs[0] = true
+		ids := make([]uint16, 0, len(glyphs))
+		for id := range glyphs {
+			ids = append(ids, id)
+		}
+		slices.Sort(ids)
+		data, err := subsetEditorFont(resource.data, ids)
+		if err != nil {
+			return nil, fmt.Errorf("subset font %s: %w", resource.font.FontName, err)
+		}
+		if len(data) < len(resource.data) {
+			result[resource.name] = data
+		}
+	}
+	return result, nil
+}
+
+// subsetEditorFont 裁剪TrueType字形及复合依赖，保留字符映射、名称、度量和提示指令。
+// 入参: data 字体数据, glyphs 已排序的字形编号，包含0
+// 返回: []byte 字体子集, error 错误信息
+func subsetEditorFont(data []byte, glyphs []uint16) ([]byte, error) {
+	sfnt, err := font.ParseSFNT(bytes.Clone(data), 0)
+	if err != nil {
+		return nil, err
+	}
+	subset, err := sfnt.Subset(glyphs, font.SubsetOptions{Tables: []string{
+		"cmap", "head", "hhea", "hmtx", "maxp", "OS/2", "post", "glyf", "loca", "cvt ", "fpgm", "prep", "gasp",
+	}})
+	if err != nil {
+		return nil, err
+	}
+	subset.Tables["name"] = sfnt.Tables["name"]
+	clear(subset.Tables["head"][8:12])
+	return serializeOTF(subset.Tables)
+}

ofdgo_editor_open.go

@@ -57,7 +57,7 @@ type editorSourcePage struct {
 }
 
 // ObjectCapabilities 已有对象可执行的操作，Reason说明受限原因。
-// Update表示完整替换内容，ReplaceFont表示可显式替换文字字体，Transform表示保留文字定位的几何变换，Order仅限当前图层。
+// Update表示完整替换内容，ReplaceFont表示可显式替换文字字体，Transform表示保留文字定位的几何变换，Order仅限同一图层或末级页块。
 // Arrange表示可准确度量对齐与旋转范围；Reflow表示可重排文字，LayoutKnown表示段落选项可恢复。
 type ObjectCapabilities struct {
 	Update      bool
@@ -348,7 +348,7 @@ func (e *Editor) ObjectCapabilities(page int, id string) (ObjectCapabilities, er
 	if err := validateEditorGeometry(object); err != nil {
 		return ObjectCapabilities{Reason: err.Error()}, nil
 	}
-	all.Order = e.sourceLayerOrderable(page, layer.ID)
+	all.Order = editorContainerOrderable(node.parent)
 	if _, err := e.prepareObject(id, object); err != nil {
 		all.Update, all.Reflow, all.Copy, all.Reason = false, false, false, err.Error()
 	}
@@ -375,23 +375,13 @@ func (e *Editor) objectOrigin(id string) *editorObjectOrigin {
 	return e.source.origins[id]
 }
 
-// sourceLayerOrderable 判断图层是否仅含可独立排序的直接对象。
-// 入参: page 页面索引, id 图层标识
+// editorContainerOrderable 判断容器的直接对象能否在保留页块的前提下排序。
+// 入参: container 图层或页块
 // 返回: bool 是否可排序
-func (e *Editor) sourceLayerOrderable(page int, id string) bool {
-	if !e.originalPage(page) {
-		return true
-	}
-	content := e.source.pages[e.pages[page].ID].root.child("Content")
-	if content != nil {
-		for _, layer := range content.children {
-			if layer.attr("ID") == id {
-				for _, child := range layer.children {
-					if !editorXMLSupported(child) {
-						return false
-					}
-				}
-			}
+func editorContainerOrderable(container *editorXML) bool {
+	for _, child := range container.children {
+		if !editorXMLSupported(child) {
+			return false
 		}
 	}
 	return true

ofdgo_editor_package.go

@@ -214,17 +214,20 @@ func (e *Editor) sourcePageXML(index int, source *editorSourcePage) ([]byte, err
 		for _, object := range original.Objects {
 			before[editorObjectID(object)] = object
 		}
+		ordered := make(map[*editorXML][]GraphicObject)
 		after := make(map[string]GraphicObject)
-		var ordered []GraphicObject
 		for _, object := range current.Objects {
 			id := editorObjectID(object)
 			after[id] = object
-			if source.nodes[id] != nil {
-				ordered = append(ordered, object)
+			if node := source.nodes[id]; node != nil {
+				ordered[node.parent] = append(ordered[node.parent], object)
 			}
 		}
-		orderable := e.sourceLayerOrderable(index, original.ID)
-		position := 0
+		positions := make(map[*editorXML]int)
+		orderable := make(map[*editorXML]bool)
+		for parent := range ordered {
+			orderable[parent] = editorContainerOrderable(parent)
+		}
 		for _, object := range original.Objects {
 			id := editorObjectID(object)
 			node := source.nodes[id]
@@ -232,12 +235,14 @@ func (e *Editor) sourcePageXML(index int, source *editorSourcePage) ([]byte, err
 				continue
 			}
 			next, exists := after[id]
-			if orderable {
-				exists = position < len(ordered)
+			if orderable[node.parent] {
+				position := positions[node.parent]
+				members := ordered[node.parent]
+				exists = position < len(members)
 				if exists {
-					next = ordered[position]
+					next = members[position]
 				}
-				position++
+				positions[node.parent]++
 			}
 			var encoded []byte
 			if exists {
@@ -369,13 +374,14 @@ func (e *Editor) sourceInfoXML() ([]byte, error) {
 }
 
 // writeSource 将未修改ZIP条目直接复制到新包，逐项写入改动，不持有原资源解压副本。
-// 入参: writer 输出流
+// 入参: writer 输出流, fonts 新增字体子集
 // 返回: int64 写入字节数, error 错误信息
-func (e *Editor) writeSource(writer io.Writer) (int64, error) {
+func (e *Editor) writeSource(writer io.Writer, fonts map[string][]byte) (int64, error) {
 	parts, err := e.sourceParts()
 	if err != nil {
 		return 0, err
 	}
+	maps.Copy(parts, fonts)
 	reader := e.source.reader
 	remaining := maps.Clone(reader.files)
 	if remaining == nil {

ofdgo_writer.go

@@ -29,19 +29,28 @@ import (
 
 const ofdNamespace = "http://www.ofdspec.org/2016"
 
-// WriteTo 逐个条目写出OFD，仅包含实际引用的资源，不关闭调用方输出流，出错时应丢弃本次输出
+// WriteTo 逐个条目写出OFD，不关闭调用方输出流，出错时应丢弃本次输出
+// 新增资源仅写入实际引用的部分，静态TrueType轮廓字体按实际文字生成子集；编辑资源、原文档字体、可变及彩色字体等保持原样。
+// 重开子集文档后输入未包含的文字，需要通过AddFont注册完整字体并替换原字体引用。
 // 入参: writer 输出流
 // 返回: int64 已写入字节数, error 错误信息
 func (e *Editor) WriteTo(writer io.Writer) (int64, error) {
 	if err := e.validate(); err != nil {
 		return 0, err
 	}
+	fonts, err := e.subsetFonts()
+	if err != nil {
+		return 0, err
+	}
 	if e.source != nil {
-		return e.writeSource(writer)
+		return e.writeSource(writer, fonts)
 	}
 	output := &ofdCountingWriter{writer: writer}
 	archive := zip.NewWriter(output)
-	err := e.writeParts(func(name string, data []byte, compressed bool) error {
+	err = e.writeParts(func(name string, data []byte, compressed bool) error {
+		if subset, ok := fonts[name]; ok {
+			data = subset
+		}
 		method := uint16(zip.Deflate)
 		if compressed {
 			method = zip.Store
@@ -60,7 +69,7 @@ func (e *Editor) WriteTo(writer io.Writer) (int64, error) {
 }
 
 // Reader 获取当前文档的独立内存快照，不进行ZIP压缩，后续修改不影响已有快照
-// 返回的Reader可用于现有渲染、搜索和导出接口，仅包含实际引用的资源，二进制数据内部共享只读
+// 返回的Reader可用于现有渲染、搜索和导出接口，新增资源仅包含实际引用的部分，二进制数据内部共享只读
 // 返回: *Reader 阅读器, error 错误信息
 func (e *Editor) Reader() (*Reader, error) {
 	if err := e.validate(); err != nil {