feat(编辑能力): 统一文字编辑，完善排版保存

assets/webui/ofdgo.js

@@ -1,4 +1,4 @@
-import { SVG_NAMESPACE, CanvasEditor, canEditObject, editTextValue, richTextModel, richTextAlignment, fontFaceStyle, missingGlyphMessage, objectEditReason, selectedText, lineShape, selectionBounds, pagePoint } from "./ofdgo_edit.js";
+import { SVG_NAMESPACE, CanvasEditor, canEditObject, editTextValue, richTextModel, richTextAlignment, richTextLayout, fontFaceStyle, missingGlyphMessage, objectEditReason, selectedText, lineShape, selectionBounds, pagePoint } from "./ofdgo_edit.js";
 import { FontManager, FontPicker } from "./ofdgo_font.js";
 import { nativeHost, createEngineWorker, engineLimits, documentBytes, saveFilePicker, directoryPicker } from "./ofdgo_host.js";
 import { PrintDialog } from "./ofdgo_print.js";
@@ -704,8 +704,10 @@ const annotationFields = Object.fromEntries(["CreateForm", "CreateCancel", "Cont
 el.editorTools.addEventListener("scroll", () => fontPicker.position());
 
 const canvasEditor = new CanvasEditor(el.viewerPanel, {
-	textControls: [el.textAlign, el.textFont, el.textFontToggle, el.textFontAdd, el.textFontList, el.textSize, el.textColor, textBackground, ...textFormatButtons, el.undoButton, el.redoButton, el.saveButton, el.saveAsButton, el.fontInput, document.querySelector("#textReflow")],
-	keepTextFocus: () => fontPicker.open || el.closePanel.open || canvasEditor.input?.fontDialog,
+	textControls: [el.textAlign, el.textFont, el.textFontToggle, el.textFontAdd, el.textFontList, el.textSize, el.textColor, el.textLineHeight, el.textSpacing, el.textWrap, el.paragraphButton, el.paragraphPanel, textBackground, ...textFormatButtons, el.undoButton, el.redoButton, el.saveButton, el.saveAsButton, el.fontInput, document.querySelector("#textReflow")],
+	keepTextFocus: () => fontPicker.open || el.closePanel.open || el.paragraphPanel.open || canvasEditor.input?.fontDialog,
+	onTextFormat: changeRangeFormat,
+	onRichInput: ensureRichInput,
 	textClipboardScope: () => `${documentTab().id}:${documentContentKey(state)}:${state.editorInfo?.revision ?? ""}`,
 	getTextClipboard: () => workspace.textClipboard,
 	setTextClipboard: clipboard => { workspace.textClipboard = clipboard; },
@@ -828,10 +830,10 @@ el.editorTools.addEventListener("pointerdown", (event) => {
 	if ((canvasEditor.input || canvasEditor.nudge) && event.target.closest("button")) event.preventDefault();
 });
 
-function editorClick(button, action) {
+function editorClick(button, action, keepText = false) {
 	button.addEventListener("click", async () => {
 		if ((canvasEditor.nudge || canvasEditor.nudgeCommit) && !await canvasEditor.commitNudge()) return;
-		if (canvasEditor.input && !await canvasEditor.commitText()) return;
+		if (!keepText && canvasEditor.input && !await canvasEditor.commitText()) return;
 		if (canvasEditor.crop && !await canvasEditor.commitCrop()) return;
 		return action();
 	});
@@ -866,16 +868,22 @@ el.textSize.addEventListener("change", () => changeTextStyle(false));
 el.textColor.addEventListener("change", () => changeTextStyle(true));
 for (const button of textFormatButtons) button.addEventListener("click", () => changeRangeFormat(button.dataset.textFormat));
 textBackground.addEventListener("change", () => changeRangeFormat("background", textBackground.value));
-editorClick(el.textWrap, () => changeParagraph(!currentTextStyle().wrap));
+editorClick(el.textWrap, () => changeParagraph(!currentTextStyle().wrap), true);
 el.textAlign.addEventListener("change", () => changeTextAlignment());
-el.textLineHeight.addEventListener("change", () => changeParagraph());
+el.textLineHeight.addEventListener("change", () => changeParagraph(undefined, "lineHeight"));
 editorClick(el.paragraphButton, () => {
 	const item = currentTextStyle();
-	for (const key of ["leftIndent", "rightIndent", "firstLineIndent"]) el[key].value = item[key] || 0;
+	for (const key of ["leftIndent", "rightIndent", "firstLineIndent"]) {
+		const mixed = Boolean(canvasEditor.input?.rich || item.richText) && item[key] === undefined;
+		el[key].required = !mixed;
+		el[key].placeholder = mixed ? "混合" : "";
+		el[key].value = mixed ? "" : item[key] || 0;
+	}
 	el.paragraphStatus.textContent = "";
 	el.paragraphPanel.showModal();
-});
+}, true);
 el.paragraphCancel.addEventListener("click", () => el.paragraphPanel.close());
+el.paragraphPanel.addEventListener("close", () => canvasEditor.input?.input.focus({ preventScroll: true }));
 editorClick(el.documentAddButton, () => openCreatePanel(false, true));
 editorClick(el.documentImportButton, () => openImportPanel(true));
 editorClick(el.documentManageButton, openDocumentManagement);
@@ -1181,20 +1189,26 @@ el.annotationForm.addEventListener("submit", async event => {
 el.paragraphForm.addEventListener("submit", async event => {
 	event.preventDefault();
 	if (document.body.hasAttribute("data-busy") || !el.paragraphForm.reportValidity()) return;
-	const item = currentTextStyle();
-	const indents = Object.fromEntries(["leftIndent", "rightIndent", "firstLineIndent"].map(key => [key, Number(el[key].value)]));
-	if (item === state.textDefaults) {
+	const item = currentTextStyle(), tab = documentTab();
+	const indents = Object.fromEntries(["leftIndent", "rightIndent", "firstLineIndent"].filter(key => el[key].value !== "").map(key => [key, Number(el[key].value)]));
+	try {
+		if (canvasEditor.input) {
+			if (!await changeInputParagraph(indents)) return;
+		} else if (item === state.textDefaults) {
 			Object.assign(item, indents);
 		} else {
 			if (!confirmTextReflow(item)) return;
-		const saved = item.richText ? await saveRichText(item, { ...item.richText, layout: { ...item.richText.layout, ...indents } })
+			const saved = item.richText ? await saveRichParagraphs(item, indents)
 				: await changeDocument("ofdgoLayoutText", item, null, null, Boolean(item.wrap), item.align || "left",
 					item.paragraphHeight || 0, item.letterSpacing || 0, ...textIndents(indents));
 			if (!saved) return;
 		}
-	el.paragraphPanel.close();
+		if (isForegroundDocument(tab)) el.paragraphPanel.close();
+	} catch (error) {
+		if (isForegroundDocument(tab) && el.paragraphPanel.open) el.paragraphStatus.textContent = error.message;
+	}
 });
-el.textSpacing.addEventListener("change", () => changeParagraph());
+el.textSpacing.addEventListener("change", () => changeParagraph(undefined, "letterSpacing"));
 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) => {
@@ -3957,24 +3971,20 @@ async function editCanvasObject(item, point = null) {
 		return openInsertPanel(item);
 	}
 	const openSeq = state.openSeq;
-	const layoutKnown = canEditObject(item, "layoutKnown");
 	tab.editTask = true;
 	setBusy(true, "", 0, "", tab);
 	try {
-		const data = await callWASM("ofdgoEditorFont", item.font, !layoutKnown);
+		const data = await callWASM("ofdgoEditorFont", item.font, !canEditObject(item, "layoutKnown"));
 		if (!isForegroundDocument(tab) || openSeq !== state.openSeq) return;
 		const face = new FontFace(`ofdgo-edit-${item.font}`, data.bytes, fontFaceStyle(data.bytes));
 		await face.load();
 		if (!isForegroundDocument(tab) || openSeq !== state.openSeq) return;
-		let rich = null;
-		if (item.richText) rich = await loadRichText(item, face, tab, data.bytes);
-		else if (layoutKnown) {
-			try { rich = await loadRichText(item, face, tab, data.bytes); } catch {}
-		}
+		const rich = await loadRichText(item, face, tab, data.bytes);
 		if (!isForegroundDocument(tab) || openSeq !== state.openSeq) return;
-		const source = rich || layoutKnown ? null : await callWASM("ofdgoPreviewText", item.index, item.id, item.text);
+		const source = rich ? null : await callWASM("ofdgoPreviewText", item.index, item.id, item.text);
 		if (isForegroundDocument(tab) && openSeq === state.openSeq && item.node.isConnected) {
 			canvasEditor.editText(item, face, source, rich);
+			canvasEditor.input.fontResource = data.bytes;
 		}
 	} catch (err) {
 		if (isForegroundDocument(tab) && openSeq === state.openSeq) {
@@ -4127,10 +4137,14 @@ function openInsertPanel(item = null) {
 
 function currentTextStyle() {
 	const text = selectedText(canvasEditor.selected) || state.textDefaults;
-	if (canvasEditor.input?.rich) return { ...text, ...canvasEditor.input.rich.state() };
+	if (canvasEditor.input?.rich) {
+		const rich = canvasEditor.input.rich, layout = richTextLayout(rich.model, ...rich.selection());
+		return { ...text, ...rich.state(), ...layout, paragraphHeight: layout.lineHeight };
+	}
 	if (text.richText) {
 		const formats = text.richText.runs.map(run => run.format);
-		return { ...text, ...Object.fromEntries(["font", "size", "color", "bold", "italic", "underline", "strikeout", "shadow", "background"]
+		const layout = richTextLayout(text.richText);
+		return { ...text, ...layout, paragraphHeight: layout.lineHeight, ...Object.fromEntries(["font", "size", "color", "bold", "italic", "underline", "strikeout", "shadow", "background"]
 			.map(key => [key, formats.every(format => format[key] === formats[0]?.[key]) ? formats[0]?.[key] : undefined])) };
 	}
 	return canvasEditor.input?.style ? { ...text, ...canvasEditor.input.style } : text;
@@ -4143,6 +4157,7 @@ async function loadRichText(item, firstFace, tab = documentTab(), firstData = nu
 		return callTabWASM(tab, name, ...args);
 	};
 	const prepared = item.richText ? { model: item.richText, frame: item.textFrame } : await callWASM("ofdgoGetRichText", item.index, item.id, reflow);
+	if (prepared.unsupported) return null;
 	const model = prepared.model;
 	const remaining = firstData ? { ...model, runs: model.runs.filter(run => run.format.font !== item.font) } : model;
 	const fontData = remaining.runs.length ? await callWASM("ofdgoRichTextFonts", JSON.stringify(remaining)) : [];
@@ -4170,8 +4185,15 @@ async function ensureRichInput(reflow = false) {
 	if (editing.item.selectionIDs) return false;
 	if (editing.rich) return true;
 	if (editing.composing || editing.saving) return false;
-	const rich = await loadRichText(editing.item, editing.face, documentTab(), null, reflow);
-	if (canvasEditor.input !== editing) return false;
+	const tab = documentTab();
+	let rich = await loadRichText(editing.item, editing.face, tab, editing.fontResource, reflow);
+	if (canvasEditor.input !== editing || !isForegroundDocument(tab)) return false;
+	if (!rich && !reflow) {
+		if (!confirmTextReflow(editing.item)) return false;
+		rich = await loadRichText(editing.item, editing.face, tab, editing.fontResource, true);
+	}
+	if (canvasEditor.input !== editing || !isForegroundDocument(tab)) return false;
+	if (!rich) throw new Error("文字暂不可重排");
 	return Boolean(editing.rich) || canvasEditor.promoteText(rich);
 }
 
@@ -4187,6 +4209,7 @@ async function reflowCanvasText() {
 
 async function changeRangeFormat(key, value) {
 	if (!state.ready || document.body.hasAttribute("data-busy") || canvasEditor.input?.composing) return;
+	const tab = documentTab(), editing = canvasEditor.input;
 	try {
 		if (!canvasEditor.selected && !canvasEditor.input) {
 			state.textDefaults[key] = value ?? (key === "background" ? state.textDefaults.background ? "" : textBackground.value : !state.textDefaults[key]);
@@ -4202,7 +4225,9 @@ async function changeRangeFormat(key, value) {
 		if (!await ensureRichInput()) return;
 		const rich = canvasEditor.input.rich, current = rich.state()[key];
 		rich.apply({ [key]: value ?? (key === "background" ? current ? "" : textBackground.value : current !== true) });
-	} catch (error) { showError(error, false); }
+	} catch (error) {
+		if (isForegroundDocument(tab) && (!editing || canvasEditor.input === editing)) showError(error, false);
+	}
 }
 
 async function validateRichText(item, model, width, fonts = []) {
@@ -4439,6 +4464,12 @@ async function changeTextFont() {
 	const editing = canvasEditor.input;
 	if (editing) {
 		if (editing.composing) return;
+		try {
+			if (!await ensureRichInput() || canvasEditor.input !== editing || !isForegroundDocument(tab)) return;
+		} catch (error) {
+			if (canvasEditor.input === editing && isForegroundDocument(tab)) showError(error, false);
+			return;
+		}
 		editing.rich?.remember();
 		tab.editTask = true;
 		setBusy(true, "", 0, "", tab);
@@ -4566,7 +4597,7 @@ async function changeTextAlignment() {
 			editing.rich.align(align);
 		} else if (canvasEditor.selected?.richText) {
 			const item = canvasEditor.selected;
-			await saveRichText(item, { ...item.richText, paragraphs: undefined, layout: { ...item.richText.layout, align } });
+			await saveRichParagraphs(item, { align });
 		} else await changeParagraph();
 	} catch (error) {
 		if (isForegroundDocument(tab) && canvasEditor.input === editing && (!editing || editing.alignSequence === sequence)) showError(error, false);
@@ -4575,8 +4606,23 @@ async function changeTextAlignment() {
 	}
 }
 
-async function changeParagraph(wrap) {
-	const item = currentTextStyle();
+async function saveRichParagraphs(item, patch) {
+	const { wrap, ...values } = patch, model = item.richText;
+	return saveRichText(item, { ...model, layout: { ...model.layout, ...(wrap !== undefined ? { wrap } : {}) },
+		paragraphs: model.runs.map(run => run.text).join("").split("\n").map((_, i) => ({ align: "", ...model.paragraphs?.[i], ...values })) });
+}
+
+async function changeParagraph(wrap, changed) {
+	const item = currentTextStyle(), tab = documentTab();
+	if (canvasEditor.input) {
+		const patch = wrap !== undefined ? { wrap: Boolean(wrap) } : {};
+		for (const [input, key, original] of [[el.textLineHeight, "lineHeight", item.paragraphHeight], [el.textSpacing, "letterSpacing", item.letterSpacing]]) {
+			if (key !== changed) continue;
+			if (!input.checkValidity()) return updateObjectControls(canvasEditor.selected, true);
+			if (input.value !== "" || original !== undefined) patch[key] = inputMillimeters(input, original || 0);
+		}
+		return changeInputParagraph(patch);
+	}
 	wrap ??= item.wrap;
 	if (document.body.hasAttribute("data-busy") || item.draft) return;
 	if (!el.textLineHeight.checkValidity()) {
@@ -4598,9 +4644,26 @@ async function changeParagraph(wrap) {
 		updateObjectControls(item, true);
 		return;
 	}
-	if (item.richText) await saveRichText(item, { ...item.richText, layout: { ...item.richText.layout, wrap: Boolean(wrap), lineHeight: height, letterSpacing: spacing } });
+	try {
+		if (item.richText) await saveRichParagraphs(item, changed === "lineHeight" ? { lineHeight: height } : changed === "letterSpacing" ? { letterSpacing: spacing } : { wrap: Boolean(wrap) });
 		else await changeDocument("ofdgoLayoutText", item, null, null, Boolean(wrap), el.textAlign.value, height, spacing, ...textIndents(item));
-	updateObjectControls(canvasEditor.selected, true);
+	} catch (error) {
+		if (isForegroundDocument(tab)) showError(error, false);
+	}
+	if (isForegroundDocument(tab)) updateObjectControls(canvasEditor.selected, true);
+}
+
+async function changeInputParagraph(patch) {
+	const editing = canvasEditor.input, tab = documentTab();
+	if (!editing || editing.composing || editing.saving || document.body.hasAttribute("data-busy")) return false;
+	try {
+		if (!await ensureRichInput() || canvasEditor.input !== editing || !isForegroundDocument(tab)) return false;
+		editing.rich.paragraph(patch);
+		return true;
+	} catch (error) {
+		if (canvasEditor.input === editing && isForegroundDocument(tab)) showError(error, false);
+		return false;
+	}
 }
 
 async function changeTextStyle(color) {
@@ -4616,11 +4679,14 @@ async function changeTextStyle(color) {
 	const size = color ? item.size : inputMillimeters(el.textSize, item.size);
 	const selectedColor = el.textColor.value;
 	const fill = color && selectedColor !== item.color ? selectedColor : null;
-	if (item.richText && !canvasEditor.input) {
-		try { if (!await ensureRichInput()) return; } catch (error) { showError(error, false); return; }
+	if (canvasEditor.input || item.richText) {
+		const editing = canvasEditor.input, tab = documentTab();
+		try {
+			if (!await ensureRichInput() || !isForegroundDocument(tab) || editing && canvasEditor.input !== editing) return;
+		} catch (error) {
+			if (isForegroundDocument(tab) && (!editing || canvasEditor.input === editing)) showError(error, false);
+			return;
 		}
-	if (canvasEditor.input) {
-		if (!color && canvasEditor.input.source && !canvasEditor.input.reflow && size !== item.size && !confirmTextReflow(item)) return;
 		canvasEditor.setTextStyle(color ? { color: selectedColor } : { size });
 		updateObjectControls(canvasEditor.selected, true);
 		return;
@@ -12487,7 +12553,7 @@ function updateObjectControls(item, reset = false) {
 		el.undoButton.disabled = !state.editorInfo?.canUndo || !state.ready || state.exporting;
 		el.redoButton.disabled = !state.editorInfo?.canRedo || !state.ready || state.exporting;
 	}
-	el.textLineHeight.disabled = el.textSpacing.disabled = el.textSize.disabled || Boolean(item?.items || item?.draft) || Boolean(canvasEditor.input);
+	el.textLineHeight.disabled = el.textSpacing.disabled = el.textSize.disabled || Boolean(item?.items);
 	el.textWrap.disabled = el.textLineHeight.disabled || text === state.textDefaults;
 	const reflow = document.querySelector("#textReflow"), positioned = canvasEditor.input?.source && (item?.selectionIDs || !canEditObject(item, "layoutKnown"));
 	reflow.hidden = !positioned;
@@ -12500,8 +12566,8 @@ function updateObjectControls(item, reset = false) {
 	const alignment = rich ? richTextAlignment(rich.model, ...rich.selection()) : item?.richText ? richTextAlignment(item.richText) : layoutKnown ? text.align || "left" : "";
 	el.textAlign.options[0].textContent = rich || item?.richText ? "混合" : "原文";
 	el.textAlign.value = alignment;
-	el.textLineHeight.placeholder = layoutKnown ? "自动" : "原文";
-	el.textSpacing.placeholder = layoutKnown ? "0" : "原文";
+	el.textLineHeight.placeholder = (rich || item?.richText) && text.paragraphHeight === undefined ? "混合" : layoutKnown ? "自动" : "原文";
+	el.textSpacing.placeholder = (rich || item?.richText) && text.letterSpacing === undefined ? "混合" : layoutKnown ? "0" : "原文";
 	el.textWrap.setAttribute("data-pressed", String(Boolean(text.wrap)));
 	if (reset || document.activeElement !== el.textLineHeight) {
 		el.textLineHeight.value = text.paragraphHeight ? String(displayPoints(text.paragraphHeight)) : "";

assets/webui/ofdgo_edit.js

@@ -59,6 +59,17 @@ export function richTextAlignment(model, start = 0, end = model.runs.reduce((n,
 	return align;
 }
 
+export function richTextLayout(model, start = 0, end = model.runs.reduce((n, run) => n + run.text.length, 0)) {
+	const [first, last] = paragraphRange(model.runs.map(run => run.text).join(""), start, end);
+	const value = { ...model.layout, ...model.paragraphs?.[first] };
+	for (const key of ["lineHeight", "letterSpacing", "leftIndent", "rightIndent", "firstLineIndent"]) {
+		value[key] ??= 0;
+		for (let i = first + 1; i <= last; i++) if ((model.paragraphs?.[i]?.[key] ?? model.layout[key] ?? 0) !== value[key]) value[key] = undefined;
+	}
+	value.align = richTextAlignment(model, start, end);
+	return value;
+}
+
 function replaceParagraphs(model, text, start, end, inserted, paragraphs) {
 	if (!model.paragraphs?.length && !paragraphs?.length) return;
 	const first = text.slice(0, start).split("\n").length - 1, last = text.slice(0, end).split("\n").length - 1;
@@ -179,6 +190,7 @@ export class RichTextSession {
 		this.model.runs = normalizeRuns(model.runs);
 		this.initial = JSON.stringify(this.model);
 		this.recordedParagraphs = this.model.paragraphs;
+		this.recordedLayout = this.model.layout;
 		this.faces = faces;
 		for (const face of faces.values()) document.fonts.add(face);
 		this.imports = new Map(imports.map(font => [font.key, font.data]));
@@ -232,13 +244,16 @@ export class RichTextSession {
 		const change = textChange(before, this.model.runs);
 		const entry = { change, typing: { ...this.typing }, caret: [...this.caret] }, old = this.entries[this.index];
 		const paragraphsChanged = JSON.stringify(this.recordedParagraphs) !== JSON.stringify(this.model.paragraphs);
+		const layoutChanged = JSON.stringify(this.recordedLayout) !== JSON.stringify(this.model.layout);
+		if (layoutChanged) entry.layout = { before: this.recordedLayout, after: this.model.layout };
+		this.recordedLayout = this.model.layout;
 		if (paragraphsChanged) entry.paragraphs = { before: this.recordedParagraphs, after: this.model.paragraphs };
 		this.recordedParagraphs = this.model.paragraphs;
 		const changed = change.before.length || change.after.length;
-		if (!changed && !paragraphsChanged && JSON.stringify(entry.typing) === JSON.stringify(old.typing)) return;
+		if (!changed && !paragraphsChanged && !layoutChanged && JSON.stringify(entry.typing) === JSON.stringify(old.typing)) return;
 		if (!changed) entry.change = null;
 		this.entries.splice(++this.index, Infinity, entry);
-		if (changed || paragraphsChanged) this.preview();
+		if (changed || paragraphsChanged || layoutChanged) this.preview();
 	}
 	undo(direction) {
 		if (this.editing.composing || this.editing.saving) return;
@@ -252,6 +267,9 @@ export class RichTextSession {
 		}
 		const paragraphs = (direction < 0 ? this.entries[this.index] : entry).paragraphs;
 		if (paragraphs) this.model.paragraphs = direction < 0 ? paragraphs.before : paragraphs.after;
+		const layout = (direction < 0 ? this.entries[this.index] : entry).layout;
+		if (layout) this.model.layout = direction < 0 ? layout.before : layout.after;
+		this.recordedLayout = this.model.layout;
 		this.recordedParagraphs = this.model.paragraphs;
 		this.index += direction;
 		this.typing = { ...entry.typing };
@@ -296,10 +314,15 @@ export class RichTextSession {
 		this.editor.options.onTextChange();
 	}
 	align(value) {
+		this.paragraph({ align: value });
+	}
+	paragraph(values) {
 		if (this.editing.composing || this.editing.saving) return;
 		this.remember();
 		const [start, end] = this.selection(), [first, last] = paragraphRange(this.text, start, end);
-		this.model.paragraphs = this.text.split("\n").map((_, i) => ({ align: i >= first && i <= last ? value : this.model.paragraphs?.[i]?.align || "" }));
+		const { wrap, ...patch } = values;
+		if (wrap !== undefined) this.model.layout = { ...this.model.layout, wrap };
+		if (Object.keys(patch).length) this.model.paragraphs = this.text.split("\n").map((_, i) => ({ align: "", ...this.model.paragraphs?.[i], ...(i >= first && i <= last ? patch : {}) }));
 		this.record(this.model.runs);
 		this.render();
 		this.editor.options.onTextChange();
@@ -350,7 +373,10 @@ export class RichTextSession {
 		const keys = new Set(runs.map(run => run.format.font));
 		const fonts = new Map([...keys].map(key => [key, this.imports.get(key) || this.resources.get(key)]).filter(([, data]) => data));
 		const first = this.text.slice(0, start).split("\n").length - 1;
-		const paragraphs = text.split("\n").map((_, i) => ({ align: this.model.paragraphs?.[first + i]?.align || this.model.layout.align || "left" }));
+		const paragraphs = text.split("\n").map((_, i) => {
+			const layout = { ...this.model.layout, ...this.model.paragraphs?.[first + i] };
+			return Object.fromEntries(["align", "lineHeight", "letterSpacing", "leftIndent", "rightIndent", "firstLineIndent"].map(key => [key, key === "align" ? layout[key] || "left" : layout[key] || 0]));
+		});
 		const clipboard = { token: crypto.randomUUID(), runs, text, paragraphs, scope: this.editor.options.textClipboardScope?.(),
 			fonts, faces: new Map([...this.faces].filter(([key]) => keys.has(key))), choices: new Map([...this.choices].filter(([key]) => keys.has(key))) };
 		if (this.editor.options.setTextClipboard) this.editor.options.setTextClipboard(clipboard);
@@ -411,7 +437,8 @@ export class RichTextSession {
 		const previous = this.renderedLines || [];
 		let offset = 0;
 		this.renderedLines = lines.map((parts, index) => {
-			const align = this.model.paragraphs?.[index]?.align || this.model.layout.align || "left";
+			const layout = { ...this.model.layout, ...this.model.paragraphs?.[index] };
+			const align = layout.align || this.model.layout.align || "left";
 			const distribute = align === "distributed" && !CSS.supports("text-justify", "inter-character");
 			const key = JSON.stringify([parts.map(part => [part.text, part.format, this.faces.get(part.format.font)?.family]), align, layout, distribute ? input.offsetWidth : null]);
 			let paragraph = (!autoWidth || !distribute) && previous[index]?.key === key && previous[index].node.parentNode === input ? previous[index].node : null;
@@ -431,6 +458,8 @@ export class RichTextSession {
 					paragraph.append(document.createElement("br"));
 				}
 				Object.assign(paragraph.style, { minWidth: layout.wrap ? "" : "max-content", textAlign: distribute ? "left" : align === "distributed" ? "justify" : align,
+					marginLeft: `${(layout.leftIndent || 0) * PX_PER_MM}px`, marginRight: `${(layout.rightIndent || 0) * PX_PER_MM}px`,
+					lineHeight: layout.lineHeight ? `${layout.lineHeight * PX_PER_MM}px` : "normal", letterSpacing: `${(layout.letterSpacing || 0) * PX_PER_MM}px`, textIndent: `${(layout.firstLineIndent || 0) * PX_PER_MM}px`,
 					textAlignLast: !distribute && align === "distributed" ? "justify" : "auto", textJustify: align === "distributed" ? "inter-character" : "auto" });
 			}
 			if (distribute && (autoWidth || previous[index]?.node !== paragraph)) distributed.push(paragraph);
@@ -1783,7 +1812,7 @@ export class CanvasEditor {
 			else paragraph.append(document.createElement("br"));
 			input.append(paragraph);
 		}
-		const left = rich?.model.layout.leftIndent || item.leftIndent || 0;
+		const left = rich ? 0 : item.leftIndent || 0;
 		const frame = { ...(rich?.frame || item.textFrame || { width: item.width, height: item.height, matrix: [1, 0, 0, 1, item.x, item.y] }) };
 		if (!rich?.frame && item.paragraphWidth != null) frame.width = item.paragraphWidth;
 		const [a, b, c, d, e, f] = frame.matrix;
@@ -1844,6 +1873,16 @@ export class CanvasEditor {
 				return;
 			}
 			event.preventDefault();
+			const copy = this.options.getTextClipboard ? this.options.getTextClipboard() : this.richClipboard;
+			if (copy && event.clipboardData.getData(RICH_CLIPBOARD) === copy.token && event.clipboardData.getData("text/plain") === copy.text && this.options.onRichInput) {
+				const data = new Map([RICH_CLIPBOARD, "text/plain"].map(key => [key, event.clipboardData.getData(key)]));
+				const value = editTextValue(input), caret = editTextSelection(input, editing.range);
+				Promise.resolve(this.options.onRichInput()).then(ready => {
+					if (ready && this.input === editing && editing.rich.text === value && (!caret || editing.rich.selection().every((at, i) => at === caret[i])))
+						return editing.rich.paste({ preventDefault() {}, clipboardData: { getData: key => data.get(key) || "" } });
+				}).catch(error => { if (this.input === editing) this.setTextError(error); });
+				return;
+			}
 			document.execCommand("insertText", false, event.clipboardData.getData("text/plain"));
 		});
 		input.addEventListener("beforeinput", event => {
@@ -1901,10 +1940,11 @@ export class CanvasEditor {
 			if (event.isComposing || editing.composing || editing.saving) {
 				return;
 			}
-			if (editing.rich && (event.ctrlKey || event.metaKey) && !event.altKey && ["b", "i", "u"].includes(event.key.toLowerCase())) {
+			if ((editing.rich || this.options.onTextFormat) && (event.ctrlKey || event.metaKey) && !event.altKey && ["b", "i", "u"].includes(event.key.toLowerCase())) {
 				event.preventDefault();
 				const key = { b: "bold", i: "italic", u: "underline" }[event.key.toLowerCase()];
-				editing.rich.apply({ [key]: editing.rich.state()[key] !== true });
+				if (this.options.onTextFormat) this.options.onTextFormat(key);
+				else editing.rich.apply({ [key]: editing.rich.state()[key] !== true });
 			} else if ((editing.source || editing.rich) && (event.ctrlKey || event.metaKey) && !event.altKey && ["z", "y"].includes(event.key.toLowerCase())) {
 				event.preventDefault();
 				this.textUndo(event.key.toLowerCase() === "y" || event.shiftKey ? 1 : -1);
@@ -1917,8 +1957,8 @@ export class CanvasEditor {
 				this.commitText();
 			}
 		});
-		input.addEventListener("copy", event => editing.rich?.copy(event));
-		input.addEventListener("cut", event => editing.rich?.copy(event, true));
+		input.addEventListener("copy", event => this.copyText(event));
+		input.addEventListener("cut", event => this.copyText(event, true));
 		if (editing.rich) editing.rich.render();
 		input.focus({ preventScroll: true });
 		if (!item.draft) document.getSelection().selectAllChildren(input);
@@ -1931,13 +1971,33 @@ export class CanvasEditor {
 		if (this.input?.rich) this.input.rich.undo(direction);
 		else this.restoreSourceText(direction);
 	}
+	copyText(event, cut = false) {
+		const editing = this.input;
+		if (!editing || editing.composing || editing.saving) return;
+		if (editing.rich) return editing.rich.copy(event, cut);
+		if (editing.item.selectionIDs) return;
+		const range = editTextSelection(editing.input, editing.range);
+		if (!range || range[0] === range[1]) return;
+		const [start, end] = range.sort((a, b) => a - b), text = editTextValue(editing.input).slice(start, end);
+		const model = richTextModel({ ...editing.item, ...editing.style, text });
+		const font = editing.fontData || editing.fontResource;
+		const clipboard = { token: crypto.randomUUID(), text, runs: model.runs, scope: this.options.textClipboardScope?.(),
+			fonts: new Map(font ? [[editing.item.font, font]] : []), faces: new Map([[editing.item.font, editing.face]]), choices: new Map(),
+			paragraphs: text.split("\n").map(() => ({ align: "left" })) };
+		if (this.options.setTextClipboard) this.options.setTextClipboard(clipboard);
+		else this.richClipboard = clipboard;
+		event.preventDefault();
+		event.clipboardData.setData("text/plain", text);
+		event.clipboardData.setData(RICH_CLIPBOARD, clipboard.token);
+		if (cut) document.execCommand("delete");
+	}
 
 	fitTextInput() {
 		const editing = this.input;
 		if (!editing || editing.source) return;
 		const { input, frame, item, rich } = editing;
 		const layout = rich?.model.layout || item;
-		const width = Math.max(0, frame.width - (layout.leftIndent || 0) - (layout.rightIndent || 0)) * PX_PER_MM + 4;
+		const width = Math.max(0, frame.width - (rich ? 0 : layout.leftIndent || 0) - (rich ? 0 : layout.rightIndent || 0)) * PX_PER_MM + 4;
 		Object.assign(input.style, { width: rich?.model.autoWidth && !layout.wrap ? "max-content" : `${width}px`, minWidth: "4px", minHeight: "0px", height: "auto" });
 	}
 
@@ -1992,7 +2052,7 @@ export class CanvasEditor {
 		document.removeEventListener("selectionchange", editing.selectionListener);
 		editing.history = null;
 		editing.range = null;
-		const [a, b, c, d, e, f] = editing.frame.matrix, left = rich.model.layout.leftIndent || 0;
+		const [a, b, c, d, e, f] = editing.frame.matrix, left = 0;
 		editing.input.style.transform = `matrix(${a},${b},${c},${d},${(e + a * left) * PX_PER_MM},${(f + b * left) * PX_PER_MM})`;
 		session.render();
 		session.preview();

internal/webui/webui.go

@@ -5001,7 +5001,7 @@ func (e *businessEngine) editorRichText(item map[string]any, object ofdgo.Graphi
 
 // getRichText 读取文字分段与段落选项，颜色转换为浏览器RGB格式
 // 入参: args 页码、对象标识和可选显式重排标记
-// 返回: any 富文本快照，携带重排标记时附带局部编辑框及页面变换, error 错误信息
+// 返回: any 富文本快照及可选编辑框，无法提升时返回unsupported, error 读取或排版错误
 func (e *businessEngine) getRichText(args []platformValue) (any, error) {
 	if e.currentEditor == nil {
 		return nil, fmt.Errorf("no document is being edited")
@@ -5011,6 +5011,10 @@ func (e *businessEngine) getRichText(args []platformValue) (any, error) {
 		return nil, err
 	}
 	value, frame, matrix, err := e.currentEditor.PrepareRichText(args[0].Int(), path, len(args) > 2 && args[2].Bool())
+	var editError *ofdgo.EditError
+	if len(args) > 2 && (errors.Is(err, ofdgo.ErrNotRichText) || errors.As(err, &editError) && editError.Code == ofdgo.EditLayoutRequired) {
+		return map[string]any{"unsupported": true}, nil
+	}
 	if err != nil {
 		return nil, err
 	}
@@ -5067,7 +5071,13 @@ func (e *businessEngine) browserRichText(value ofdgo.RichText) map[string]any {
 	}
 	paragraphs := make([]any, len(value.Paragraphs))
 	for i, paragraph := range value.Paragraphs {
-		paragraphs[i] = map[string]any{"align": paragraph.Align}
+		entry := map[string]any{"align": paragraph.Align}
+		for key, value := range map[string]*float64{"lineHeight": paragraph.LineHeight, "letterSpacing": paragraph.LetterSpacing, "leftIndent": paragraph.LeftIndent, "rightIndent": paragraph.RightIndent, "firstLineIndent": paragraph.FirstLineIndent} {
+			if value != nil {
+				entry[key] = *value
+			}
+		}
+		paragraphs[i] = entry
 	}
 	layout := value.Layout
 	return map[string]any{"autoWidth": value.AutoWidth, "runs": runs, "paragraphs": paragraphs, "layout": map[string]any{

ofdgo_editor.go

@@ -248,7 +248,6 @@ func (e *Editor) PageContext(ctx context.Context, index int) (*PageContent, erro
 			}
 			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)
@@ -804,9 +803,6 @@ func (e *Editor) LayoutText(obj *TextObject, value string, options TextLayout) e
 	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
 }
 

ofdgo_editor_composite.go

@@ -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

ofdgo_editor_composite_copy.go

@@ -338,7 +338,9 @@ func (e *Editor) pasteCompositeSelection(selection *CompositeSelection, paste fu
 			return err
 		}
 		object.state = copy.states[editorObjectID(copy.object)]
+		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)

ofdgo_editor_composite_group.go

@@ -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)]
+			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

ofdgo_editor_composite_text.go

@@ -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 != "" {
@@ -161,6 +169,7 @@ 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
 	}

ofdgo_editor_font_binding.go

@@ -968,7 +968,7 @@ func pruneUnreferencedFiles(ctx context.Context, reader *Reader, candidates ...s
 				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 && !textLayoutAttribute(node.Name, attr) {
 					uncertain = true
 					return fmt.Errorf("unknown file dependencies in %s", name)
 				}

ofdgo_editor_font_scan.go

@@ -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 && !textLayoutAttribute(node.name, attr) {
 					scan.unsafe = true
 				}
 			}

ofdgo_editor_group.go

@@ -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

ofdgo_editor_namespace.go

@@ -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
 }

ofdgo_editor_reference.go

@@ -207,7 +207,7 @@ 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 || textLayoutAttribute(token.Name, attr) {
 				continue
 			}
 			custom := len(s.stack) == 0 && token.Name.Local == "CustomTags" || len(s.stack) > 0 && s.stack[0] == "CustomTags"

ofdgo_editor_rich_text.go

@@ -741,7 +741,7 @@ func (e *Editor) promoteTextValue(t TextObject) (RichText, error) {
 		}
 		color = fmt.Sprintf("%d %d %d", r>>8, g>>8, b>>8)
 	}
-	result := RichText{AutoWidth: t.layout == nil, 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()
 }
 
@@ -1192,7 +1192,7 @@ func (e *Editor) PrepareRichText(page int, path ObjectPath, reflow bool) (RichTe
 	if err != nil {
 		return RichText{}, Box{}, Matrix{}, err
 	}
-	autoWidth := text.layout == nil
+	autoWidth := text.layout == nil || text.layout.autoWidth
 	if reflow {
 		value, layout := text.TextLayout()
 		layout.AutoBidi = true

ofdgo_editor_text.go

@@ -15,6 +15,9 @@
 package ofdgo
 
 import (
+	"crypto/sha256"
+	"encoding/json"
+	"encoding/xml"
 	"errors"
 	"fmt"
 	"image/color"
@@ -34,7 +37,7 @@ 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
+// 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
@@ -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
+	autoWidth bool
+}
+
+// textLayoutNamespace 标识普通文字排版元数据，不包含资源引用
+const textLayoutNamespace = "https://ofdgo.aite.me/text-layout"
+
+// textLayoutAttribute 判断无资源引用的文字排版扩展属性
+// 入参: node 所属节点, attr 属性
+// 返回: bool 是否为本库排版属性
+func textLayoutAttribute(node xml.Name, attr xml.Attr) bool {
+	return classifyOFDNamespace(node.Space) != ofdXMLUnknown && (node.Local == "TextObject" || node.Local == "Text") && attr.Name.Space == textLayoutNamespace && attr.Name.Local == "Layout"
+}
+
+// textLayoutMetadata 保存原文、选项与标准定位摘要
+type textLayoutMetadata struct {
+	Text      string
+	Options   TextLayout
+	AutoWidth bool
+	Digest    string
+}
+
+// layoutDigest 计算与字体编号无关的文字定位摘要
+// 返回: string 摘要
+func (obj TextObject) layoutDigest() 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))
+}
+
+// layoutMetadata 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) layoutMetadata() (string, error) {
+	if obj.layout == nil {
+		return "", nil
+	}
+	data, err := json.Marshal(textLayoutMetadata{Text: obj.layout.value, Options: obj.layout.options, AutoWidth: obj.layout.autoWidth, Digest: obj.layoutDigest()})
+	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

ofdgo_editor_xml.go

@@ -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 textLayoutAttribute(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)
+	layoutValue := func(n *editorXML) string {
+		for _, attr := range n.attrs {
+			if attr.Name.Space == textLayoutNamespace && attr.Name.Local == "Layout" {
+				return attr.Value
+			}
+		}
+		return ""
+	}
+	layoutChanged := layoutValue(oldNode) != layoutValue(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 && !layoutChanged && !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 layoutChanged {
+		value, found := layoutValue(newNode), false
+		attrs := start.Attr[:0]
+		for i, attr := range start.Attr {
+			resolved := node.attrs[i]
+			if resolved.Name.Space == textLayoutNamespace && resolved.Name.Local == "Layout" {
+				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: textLayoutNamespace}, xml.Attr{Name: xml.Name{Space: prefix, Local: "Layout"}, 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

ofdgo_resource.go

@@ -403,7 +403,7 @@ func scanResourcePage(ctx context.Context, file *editorFontXML, pages map[string
 				return false, false, nil, nil
 			}
 			for _, attr := range token.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 && !textLayoutAttribute(token.Name, attr) {
 					return false, false, nil, nil
 				}
 			}

ofdgo_rich_layout.go

@@ -92,7 +92,6 @@ func (e *Editor) layoutRichText(value RichText, width float64) (richLayout, erro
 		return richLayout{}, err
 	}
 	options := value.Layout
-	available := width - options.LeftIndent - options.RightIndent
 	if !finite(width) || width <= 0 {
 		return richLayout{}, fmt.Errorf("invalid rich text width or indents")
 	}
@@ -126,14 +125,14 @@ func (e *Editor) layoutRichText(value RichText, width float64) (richLayout, erro
 	chars := []rune(value.Text())
 	var face *typefont.Face
 	if value.AutoWidth && !options.Wrap {
-		width = max(1, options.LeftIndent+options.RightIndent+max(0, options.FirstLineIndent)+1)
-		for start := 0; start <= len(chars); {
+		width = 1
+		for start, paragraphIndex := 0, 0; start <= len(chars); paragraphIndex++ {
 			end := start
 			for end < len(chars) && chars[end] != '\n' {
 				end++
 			}
 			paragraph := chars[start:end]
-			local := richParagraphOptions(paragraph, options)
+			local := richParagraphOptions(paragraph, value.ParagraphLayout(paragraphIndex))
 			if local.Shaping.Bidi && face == nil && len(paragraph) > 0 {
 				face, err = typefont.ParseTTF(bytes.NewReader(metrics[owners[start]].font.Write()))
 				if err != nil {
@@ -148,16 +147,12 @@ func (e *Editor) layoutRichText(value RichText, width float64) (richLayout, erro
 			for _, advance := range advances {
 				length += advance
 			}
-			width = max(width, local.LeftIndent+local.RightIndent+local.FirstLineIndent+length)
+			width = max(width, local.LeftIndent+local.RightIndent+max(0, local.FirstLineIndent)+1, local.LeftIndent+local.RightIndent+local.FirstLineIndent+length)
 			if end == len(chars) {
 				break
 			}
 			start = end + 1
 		}
-		available = width - options.LeftIndent - options.RightIndent
-	}
-	if !finite(available) || available <= 0 || !finite(available-options.FirstLineIndent) || available-options.FirstLineIndent <= 0 {
-		return richLayout{}, fmt.Errorf("invalid rich text width or indents")
 	}
 	result.width = width
 	var underlays []GraphicObject
@@ -169,9 +164,10 @@ func (e *Editor) layoutRichText(value RichText, width float64) (richLayout, erro
 			end++
 		}
 		paragraph := chars[start:end]
-		local := options
-		if len(value.Paragraphs) > 0 && value.Paragraphs[paragraphIndex].Align != "" {
-			local.Align = value.Paragraphs[paragraphIndex].Align
+		local := value.ParagraphLayout(paragraphIndex)
+		available := width - local.LeftIndent - local.RightIndent
+		if !finite(available) || available <= 0 || !finite(available-local.FirstLineIndent) || available-local.FirstLineIndent <= 0 {
+			return richLayout{}, fmt.Errorf("invalid rich text width or indents")
 		}
 		local = richParagraphOptions(paragraph, local)
 		if local.Shaping.Bidi && face == nil && len(paragraph) > 0 {

ofdgo_rich_text.go

@@ -38,9 +38,34 @@ type RichText struct {
 	Paragraphs []RichTextParagraph `json:"paragraphs,omitempty"`
 }
 
-// RichTextParagraph 保存显式段落的对齐方式，空值沿用Layout，按LF分隔的段落顺序排列
+// RichTextParagraph 保存显式段落选项，空值沿用Layout，按LF分隔的段落顺序排列
 type RichTextParagraph struct {
 	Align           string   `json:"align"`
+	LineHeight      *float64 `json:"lineHeight,omitempty"`
+	LetterSpacing   *float64 `json:"letterSpacing,omitempty"`
+	LeftIndent      *float64 `json:"leftIndent,omitempty"`
+	RightIndent     *float64 `json:"rightIndent,omitempty"`
+	FirstLineIndent *float64 `json:"firstLineIndent,omitempty"`
+}
+
+// ParagraphLayout 返回指定段落覆盖后的排版选项
+// 入参: index 段落序号
+// 返回: TextLayout 有效段落选项
+func (v RichText) ParagraphLayout(index int) TextLayout {
+	options := v.Layout
+	if index < 0 || index >= len(v.Paragraphs) {
+		return options
+	}
+	p := v.Paragraphs[index]
+	if p.Align != "" {
+		options.Align = p.Align
+	}
+	for _, pair := range []struct{ source, target *float64 }{{p.LineHeight, &options.LineHeight}, {p.LetterSpacing, &options.LetterSpacing}, {p.LeftIndent, &options.LeftIndent}, {p.RightIndent, &options.RightIndent}, {p.FirstLineIndent, &options.FirstLineIndent}} {
+		if pair.source != nil {
+			*pair.target = *pair.source
+		}
+	}
+	return options
 }
 
 // RichTextRun 保存文字及完整格式，换行使用LF，长度单位为毫米
@@ -154,8 +179,8 @@ func (v RichText) Validate() error {
 	if len(v.Paragraphs) != 0 && len(v.Paragraphs) != strings.Count(v.Text(), "\n")+1 {
 		return fmt.Errorf("rich text paragraph count does not match text")
 	}
-	for _, paragraph := range v.Paragraphs {
-		if err := validateRichLayout(TextLayout{Align: paragraph.Align}); err != nil {
+	for index := range v.Paragraphs {
+		if err := validateRichLayout(v.ParagraphLayout(index)); err != nil {
 			return err
 		}
 	}
@@ -249,12 +274,12 @@ func (v RichText) Slice(start, end int) (RichText, error) {
 	if err := v.checkRange(start, end); err != nil {
 		return RichText{}, err
 	}
-	result := RichText{Layout: v.Layout, Runs: v.sliceRuns(start, end)}
+	result := RichText{AutoWidth: v.AutoWidth, Layout: v.Layout, Runs: v.sliceRuns(start, end)}
 	if len(v.Paragraphs) > 0 {
 		chars := []rune(v.Text())
 		first := strings.Count(string(chars[:start]), "\n")
 		count := strings.Count(string(chars[start:end]), "\n") + 1
-		result.Paragraphs = slices.Clone(v.Paragraphs[first : first+count])
+		result.Paragraphs = cloneEditorData(v.Paragraphs[first : first+count])
 	}
 	if len(result.Runs) == 0 {
 		position := 0
@@ -298,7 +323,7 @@ func (v *RichText) Replace(start, end int, runs []RichTextRun) error {
 	if err := v.checkRange(start, end); err != nil {
 		return err
 	}
-	next := RichText{Layout: v.Layout, Runs: v.sliceRuns(0, start)}
+	next := RichText{AutoWidth: v.AutoWidth, Layout: v.Layout, Runs: v.sliceRuns(0, start)}
 	next.Runs = append(next.Runs, runs...)
 	next.Runs = append(next.Runs, v.sliceRuns(end, v.Len())...)
 	if len(next.Runs) == 0 {
@@ -318,6 +343,7 @@ func (v *RichText) Replace(start, end int, runs []RichTextRun) error {
 			next.Paragraphs = append(next.Paragraphs, v.Paragraphs[first])
 		}
 		next.Paragraphs = append(next.Paragraphs, v.Paragraphs[last+1:]...)
+		next.Paragraphs = cloneEditorData(next.Paragraphs)
 	}
 	next = normalizeRichText(next)
 	if err := next.Validate(); err != nil {
@@ -359,13 +385,31 @@ func (v *RichText) ApplyFormat(start, end int, patch TextFormatPatch) error {
 // 入参: start 起点, end 终点, align 对齐方式
 // 返回: error 无效范围或对齐方式
 func (v *RichText) AlignParagraphs(start, end int, align string) error {
+	if err := v.FormatParagraphs(start, end, RichTextParagraph{Align: align}); err != nil {
+		return err
+	}
+	if align == "" {
+		chars := []rune(v.Text())
+		first := strings.Count(string(chars[:start]), "\n")
+		last := strings.Count(string(chars[:max(start, end-1)]), "\n")
+		for i := first; i <= last; i++ {
+			v.Paragraphs[i].Align = ""
+		}
+	}
+	return nil
+}
+
+// FormatParagraphs 修改当前或选中段落的显式选项，未提供的字段保持原值
+// 入参: start 起点, end 终点, patch 段落增量
+// 返回: error 范围或排版错误
+func (v *RichText) FormatParagraphs(start, end int, patch RichTextParagraph) error {
 	if v == nil {
 		return fmt.Errorf("nil rich text")
 	}
 	if err := v.checkRange(start, end); err != nil {
 		return err
 	}
-	if err := validateRichLayout(TextLayout{Align: align}); err != nil {
+	if err := validateRichLayout((RichText{Paragraphs: []RichTextParagraph{patch}}).ParagraphLayout(0)); err != nil {
 		return err
 	}
 	chars := []rune(v.Text())
@@ -379,7 +423,19 @@ func (v *RichText) AlignParagraphs(start, end int, align string) error {
 		paragraphs = make([]RichTextParagraph, strings.Count(v.Text(), "\n")+1)
 	}
 	for i := first; i <= last; i++ {
-		paragraphs[i].Align = align
+		p := &paragraphs[i]
+		if patch.Align != "" {
+			p.Align = patch.Align
+		}
+		for _, pair := range []struct {
+			source *float64
+			target **float64
+		}{{patch.LineHeight, &p.LineHeight}, {patch.LetterSpacing, &p.LetterSpacing}, {patch.LeftIndent, &p.LeftIndent}, {patch.RightIndent, &p.RightIndent}, {patch.FirstLineIndent, &p.FirstLineIndent}} {
+			if pair.source != nil {
+				value := *pair.source
+				*pair.target = &value
+			}
+		}
 	}
 	v.Paragraphs = paragraphs
 	return nil

ofdgo_text.go

@@ -16,6 +16,7 @@ package ofdgo
 
 import (
 	"context"
+	"encoding/json"
 	"encoding/xml"
 	"math"
 	"strconv"
@@ -430,6 +431,14 @@ func (obj *TextObject) UnmarshalXML(decoder *xml.Decoder, start xml.StartElement
 		return err
 	}
 	*obj = TextObject(value)
+	for _, attr := range start.Attr {
+		if attr.Name.Space == textLayoutNamespace && attr.Name.Local == "Layout" {
+			var meta textLayoutMetadata
+			if json.Unmarshal([]byte(attr.Value), &meta) == nil && validateRichLayout(meta.Options) == nil && structureXMLText(meta.Text) && meta.Digest == obj.layoutDigest() {
+				obj.layout = &textLayout{value: meta.Text, options: meta.Options, autoWidth: meta.AutoWidth}
+			}
+		}
+	}
 	for _, attr := range ofdXMLStart(start).Attr {
 		if attr.Name.Local == "LineWidth" {
 			obj.LineWidthSet = obj.LineWidth == 0

ofdgo_text_layout.go

@@ -143,10 +143,7 @@ func LayoutText(obj *TextObject, value string, options TextLayout, metrics FontM
 	}
 	obj.TextCode = codes
 	obj.CGTransform = nil
-	obj.layout = nil
-	if options != (TextLayout{}) {
-		obj.layout = &textLayout{value: value, options: options}
-	}
+	obj.layout = &textLayout{value: value, options: options, autoWidth: options == (TextLayout{})}
 	return nil
 }
 

ofdgo_writer.go

@@ -1242,6 +1242,15 @@ func (x *ofdXML) object(object GraphicObject, root bool) {
 	switch object.Type {
 	case "TextObject", "Text":
 		obj := object.TextObject
+		metadata, err := obj.layoutMetadata()
+		if err != nil {
+			x.err = err
+			return
+		}
+		if metadata != "" {
+			attrs.add("xmlns:ofdgo", textLayoutNamespace)
+			attrs.add("ofdgo:Layout", metadata)
+		}
 		attrs.add("ID", obj.ID)
 		attrs.add("DrawParam", obj.DrawParam)
 		attrs.add("Boundary", obj.Boundary)

ofdgo_xml.go

@@ -93,7 +93,10 @@ func decodeOFDChildren(d *xml.Decoder, start xml.StartElement, decode func(*xml.
 				}
 				continue
 			}
-			if err := decode(d, ofdXMLStart(node)); err != nil {
+			if node.Name.Local != "TextObject" && node.Name.Local != "Text" {
+				node = ofdXMLStart(node)
+			}
+			if err := decode(d, node); err != nil {
 				return err
 			}
 		case xml.EndElement: