feat(创建编辑): 支持画布文字输入、段落排版与多选编辑

assets/webui/index.html

@@ -61,8 +61,9 @@
 				<button id="redoButton" class="button" type="button" disabled>重做</button>
 				<span>文件</span>
 			</div>
-			<div class="editor-group">
+			<div class="editor-group editor-objects">
 				<button id="selectObjectButton" class="button" type="button" aria-pressed="true">选择</button>
+				<button id="multiSelectButton" class="button" type="button" aria-pressed="false" title="多选对象">多选</button>
 				<button id="editObjectButton" class="button" type="button" aria-label="修改对象" disabled>修改</button>
 				<button id="copyObjectButton" class="button" type="button" aria-label="复制对象" disabled>复制</button>
 				<button id="deleteObjectButton" class="button" type="button" disabled>删除</button>
@@ -73,25 +74,36 @@
 					<option value="top">置顶</option>
 					<option value="bottom">置底</option>
 				</select>
-				<select id="objectAlign" class="order-select" aria-label="页面对齐" disabled>
+				<select id="objectAlign" class="order-select" aria-label="对象对齐" disabled>
 					<option value="" hidden>对齐</option>
 					<option value="left">左侧</option>
-					<option value="center">水平居中</option>
+					<option value="center">水平</option>
 					<option value="right">右侧</option>
 					<option value="top">顶部</option>
-					<option value="middle">垂直居中</option>
+					<option value="middle">垂直</option>
 					<option value="bottom">底部</option>
 				</select>
 				<span>对象</span>
 			</div>
 			<div class="editor-group">
-				<select id="textFont" aria-label="字体" title="字体" disabled></select>
+				<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="form-unit text-size"><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>
 			</div>
+			<div class="editor-group editor-paragraph">
+				<select id="textAlign" aria-label="段落对齐" title="段落对齐" disabled>
+					<option value="left">左齐</option>
+					<option value="center">居中</option>
+					<option value="right">右齐</option>
+					<option value="justify">两端</option>
+				</select>
+				<button id="textWrap" class="button" type="button" aria-label="自动折行" aria-pressed="false" disabled>折行</button>
+				<label class="form-unit paragraph-height"><span>行距</span><input id="textLineHeight" type="number" min="0" step="any" placeholder="自动" aria-label="行距" title="行距，0为自动" disabled><span>pt</span></label>
+				<span>段落</span>
+			</div>
 			<div class="editor-group">
-				<button id="insertTextButton" class="button" type="button" aria-label="添加文字">文字</button>
+				<button id="insertTextButton" class="button" type="button" aria-label="添加文字" aria-pressed="false">文字</button>
 				<button id="insertImageButton" class="button" type="button" aria-label="添加图片">图片</button>
 				<button id="drawLineButton" class="button" type="button" aria-label="绘制直线" aria-pressed="false">直线</button>
 				<button id="drawRectangleButton" class="button" type="button" aria-label="绘制矩形" aria-pressed="false">矩形</button>
@@ -163,22 +175,11 @@
 				</div>
 			</form>
 		</dialog>
-		<dialog id="insertPanel" class="form-dialog" aria-label="添加文字">
+		<dialog id="insertPanel" class="form-dialog" aria-label="添加图片">
 			<form id="insertForm">
-				<div id="insertTextRow" class="form-row">
-					<label for="insertText">内容</label>
-					<textarea id="insertText" rows="3" required autofocus></textarea>
-				</div>
-				<div id="insertFontRow" class="form-row">
-					<label for="insertFont">字体</label>
-					<div class="form-font">
-						<select id="insertFont" required></select>
-						<button id="insertFontAdd" class="icon-button" type="button" title="添加字体" aria-label="添加字体">+</button>
-					</div>
-				</div>
-				<div id="insertImageRow" class="form-row" hidden>
+				<div class="form-row">
 					<label for="insertImage">图片</label>
-					<input id="insertImage" type="file" accept=".png,.jpg,.jpeg,image/png,image/jpeg" required>
+					<input id="insertImage" type="file" accept=".png,.jpg,.jpeg,image/png,image/jpeg" required autofocus>
 				</div>
 				<div class="form-actions">
 					<div id="insertStatus" class="form-status" role="status"></div>

assets/webui/ofdgo.css

@@ -111,11 +111,27 @@ a:focus-visible {
 }
 
 .editor-file,
+.editor-paragraph,
 .editor-group:has(#textFont),
 .editor-group:has(#shapeFill) {
 	grid-template-columns: repeat(2, max-content);
 }
 
+.editor-objects {
+	grid-template-columns: repeat(4, max-content);
+}
+
+.form-unit.paragraph-height {
+	grid-column: 1 / -1;
+	grid-template-columns: auto 58px auto;
+	gap: 4px;
+}
+
+.paragraph-height input {
+	width: 58px;
+	min-width: 0;
+}
+
 .editor-file #saveButton {
 	grid-row: 1 / 3;
 	height: 100%;
@@ -126,9 +142,8 @@ a:focus-visible {
 }
 
 #textFont {
-	grid-column: 1 / -1;
-	width: 128px;
-	min-width: 100%;
+	width: 100%;
+	min-width: 0;
 }
 
 .shape-paint,
@@ -268,7 +283,7 @@ button:not(:disabled):hover {
 
 .new-icon {
 	position: relative;
-	width: 12px;
+	width: 15px;
 	height: 15px;
 	border: 1px solid currentColor;
 }
@@ -338,12 +353,15 @@ button:not(:disabled):hover {
 }
 
 .page-control input,
+.paragraph-height input,
 .text-size input {
 	appearance: textfield;
 }
 
 .page-control input::-webkit-inner-spin-button,
 .page-control input::-webkit-outer-spin-button,
+.paragraph-height input::-webkit-inner-spin-button,
+.paragraph-height input::-webkit-outer-spin-button,
 .text-size input::-webkit-inner-spin-button,
 .text-size input::-webkit-outer-spin-button {
 	-webkit-appearance: none;
@@ -451,6 +469,7 @@ button:not(:disabled):hover {
 .form-row input[type="file"],
 .form-row select,
 .form-row textarea,
+.paragraph-height input,
 .text-size input {
 	width: 100%;
 	min-width: 0;
@@ -531,10 +550,12 @@ button:not(:disabled):hover {
 	color: var(--text-muted);
 }
 
-.form-font {
+.text-font {
 	display: grid;
+	width: 160px;
 	grid-template-columns: minmax(0, 1fr) auto;
-	gap: 8px;
+	grid-column: 1 / -1;
+	gap: 4px;
 }
 
 .form-row input[aria-invalid="true"] {
@@ -1241,6 +1262,10 @@ button.outline-link:hover {
 	display: block;
 }
 
+.multi-selected .edit-handle {
+	display: none;
+}
+
 .edit-handle::before {
 	position: absolute;
 	inset: calc(-8px / var(--surface-scale));

assets/webui/ofdgo.js

@@ -37,8 +37,9 @@ const state = {
 	editorInfo: null,
 	savedRevision: null,
 	insertObject: null,
-	insertFonts: [],
 	textFonts: [],
+	textFontID: null,
+	textDefaults: { type: "TextObject", size: 12 * 25.4 / 72, color: "#000000", wrap: true, align: "left", paragraphHeight: 0 },
 	ofdBytes: null,
 	fileName: "ofdgo.ofd",
 	openSeq: 0,
@@ -91,7 +92,12 @@ const el = {
 	copyObjectButton: document.querySelector("#copyObjectButton"),
 	objectOrder: document.querySelector("#objectOrder"),
 	objectAlign: document.querySelector("#objectAlign"),
+	multiSelectButton: document.querySelector("#multiSelectButton"),
+	textAlign: document.querySelector("#textAlign"),
+	textWrap: document.querySelector("#textWrap"),
+	textLineHeight: document.querySelector("#textLineHeight"),
 	textFont: document.querySelector("#textFont"),
+	textFontAdd: document.querySelector("#textFontAdd"),
 	textSize: document.querySelector("#textSize"),
 	textColor: document.querySelector("#textColor"),
 	drawLineButton: document.querySelector("#drawLineButton"),
@@ -130,12 +136,6 @@ const el = {
 	createCancel: document.querySelector("#createCancel"),
 	insertPanel: document.querySelector("#insertPanel"),
 	insertForm: document.querySelector("#insertForm"),
-	insertTextRow: document.querySelector("#insertTextRow"),
-	insertFontRow: document.querySelector("#insertFontRow"),
-	insertImageRow: document.querySelector("#insertImageRow"),
-	insertText: document.querySelector("#insertText"),
-	insertFont: document.querySelector("#insertFont"),
-	insertFontAdd: document.querySelector("#insertFontAdd"),
 	insertImage: document.querySelector("#insertImage"),
 	insertStatus: document.querySelector("#insertStatus"),
 	insertCancel: document.querySelector("#insertCancel"),
@@ -235,16 +235,20 @@ const canvasEditor = new CanvasEditor(el.viewerPanel, {
 	busy: () => document.body.hasAttribute("aria-busy"),
 	rotation: () => state.rotation,
 	onSelect: updateObjectControls,
-	onTransform: (item, change) => changeDocument("ofdgoTransformObject", item,
+	onTransform: (item, change) => changeDocument(item.items ? "ofdgoTransformObjects" : "ofdgoTransformObject", item,
 		change.x + item.x * (1 - change.scale), change.y + item.y * (1 - change.scale), change.scale),
 	onReshape: (item, box) => changeDocument("ofdgoReshapeObject", item, box.x, box.y, box.width, box.height),
-	onDelete: (item) => changeDocument("ofdgoDeleteObject", item),
+	onTextWidth: (item, box) => changeDocument("ofdgoLayoutText", item, box.x, box.width, true, item.align || "", item.paragraphHeight || 0),
+	onDelete: (item) => changeDocument(item.items ? "ofdgoDeleteObjects" : "ofdgoDeleteObject", item),
 	onEdit: editCanvasObject,
 	drawStyle: shapeStyle,
 	onTool: updateDrawingControls,
 	onDraw: (index, shape, box, style) => changeDocument("ofdgoInsertShape", null, index, shape,
 		box.x, box.y, box.width, box.height, style.fill, style.fillColor, style.stroke, style.strokeColor, style.lineWidth),
-	onCommitText: (item, value) => changeDocument("ofdgoUpdateText", item, value, null, item.size, null),
+	onDrawText: beginCanvasText,
+	onCommitText: (item, value) => item.draft
+		? changeDocument("ofdgoInsertText", null, item.index, value, item.fontData, item.x, item.y, item.size, item.color, item.width, item.wrap, item.align, item.paragraphHeight)
+		: changeDocument("ofdgoUpdateText", item, value, null, item.size, null),
 	onTextChange: () => {
 		const editing = canvasEditor.input;
 		setDirty(state.editing && (state.editorInfo?.revision !== state.savedRevision
@@ -255,7 +259,19 @@ const canvasEditor = new CanvasEditor(el.viewerPanel, {
 	},
 });
 
-el.selectObjectButton.addEventListener("click", () => {
+el.editorTools.addEventListener("pointerdown", (event) => {
+	if (canvasEditor.input && event.target.closest("button")) event.preventDefault();
+});
+
+// editorClick commits inline text before resolving the selection for a toolbar command.
+function editorClick(button, action) {
+	button.addEventListener("click", async () => {
+		if (canvasEditor.input && !await canvasEditor.commitText()) return;
+		return action();
+	});
+}
+
+editorClick(el.selectObjectButton, () => {
 	if (document.body.hasAttribute("aria-busy")) {
 		return;
 	}
@@ -266,41 +282,61 @@ el.selectObjectButton.addEventListener("click", () => {
 	}
 	updateEditorTools();
 });
-el.deleteObjectButton.addEventListener("click", () => {
+editorClick(el.deleteObjectButton, () => {
 	if (canvasEditor.selected) {
-		changeDocument("ofdgoDeleteObject", canvasEditor.selected);
+		canvasEditor.options.onDelete(canvasEditor.selected);
 	}
 });
-el.editObjectButton.addEventListener("click", () => {
+editorClick(el.multiSelectButton, () => {
+	canvasEditor.multiple = !canvasEditor.multiple;
+	el.multiSelectButton.setAttribute("aria-pressed", String(canvasEditor.multiple));
+});
+editorClick(el.editObjectButton, () => {
 	if (canvasEditor.selected) {
-		openInsertPanel(canvasEditor.selected.type === "TextObject", canvasEditor.selected);
+		editCanvasObject(canvasEditor.selected);
 	}
 });
 el.textSize.addEventListener("change", () => changeTextStyle(false));
+el.textSize.addEventListener("focus", () => updateObjectControls(canvasEditor.selected, true));
+el.textSize.addEventListener("blur", () => updateObjectControls(canvasEditor.selected, true));
 el.textColor.addEventListener("change", () => changeTextStyle(true));
-el.textFont.addEventListener("change", () => {
+editorClick(el.textWrap, () => changeParagraph(!currentTextStyle().wrap));
+el.textAlign.addEventListener("change", () => changeParagraph());
+el.textLineHeight.addEventListener("change", () => changeParagraph());
+el.textFont.addEventListener("change", async () => {
 	const item = canvasEditor.selected;
 	const font = state.textFonts[Number(el.textFont.value)];
-	if (item?.type === "TextObject" && state.ready && !document.body.hasAttribute("aria-busy") && font && !font.embedded) {
-		return changeDocument("ofdgoUpdateText", item, item.text, fontManager.read(font), item.size, null);
+	if (!state.ready || document.body.hasAttribute("aria-busy") || !font || item?.draft) return;
+	if (item?.type === "TextObject") {
+		if (!font.embedded) {
+			await changeDocument("ofdgoUpdateText", item, item.text, fontManager.read(font), item.size, null);
+			updateTextFonts(canvasEditor.selected, true);
+		}
+	} else {
+		state.textDefaults.fontChoice = font;
 	}
 });
 el.shapeWidth.addEventListener("focus", () => { el.shapeWidth.defaultValue = el.shapeWidth.value; });
-for (const input of [el.textSize, el.shapeWidth]) {
+for (const input of [el.textSize, el.shapeWidth, el.textLineHeight]) {
 	input.addEventListener("keydown", (event) => {
+		if (event.isComposing) return;
 		if (event.key === "Enter" || event.key === "Escape") {
 			event.preventDefault();
+			event.stopPropagation();
+			if (event.repeat) return;
 			if (event.key === "Escape") {
 				updateObjectControls(canvasEditor.selected, true);
 				if (input === el.shapeWidth && canvasEditor.selected?.type !== "PathObject") {
 					input.value = input.defaultValue;
 				}
+				input.blur();
+			} else {
+				input.dispatchEvent(new Event("change"));
 			}
-			input.blur();
 		}
 	});
 }
-el.copyObjectButton.addEventListener("click", () => {
+editorClick(el.copyObjectButton, () => {
 	const item = canvasEditor.selected;
 	if (!item) {
 		return;
@@ -325,13 +361,13 @@ el.objectAlign.addEventListener("change", () => {
 	const alignment = el.objectAlign.value;
 	el.objectAlign.value = "";
 	if (canvasEditor.selected && alignment) {
-		return changeDocument("ofdgoAlignObject", canvasEditor.selected, alignment);
+		return changeDocument(canvasEditor.selected.items ? "ofdgoAlignObjects" : "ofdgoAlignObject", canvasEditor.selected, alignment);
 	}
 });
-el.undoButton.addEventListener("click", () => changeDocument("ofdgoUndo"));
-el.redoButton.addEventListener("click", () => changeDocument("ofdgoRedo"));
+editorClick(el.undoButton, () => changeDocument("ofdgoUndo"));
+editorClick(el.redoButton, () => changeDocument("ofdgoRedo"));
 for (const [button, tool] of [[el.drawLineButton, "line"], [el.drawRectangleButton, "rectangle"], [el.drawEllipseButton, "ellipse"]]) {
-	button.addEventListener("click", () => {
+	editorClick(button, () => {
 		if (!state.editing || document.body.hasAttribute("aria-busy")) {
 			return;
 		}
@@ -345,15 +381,15 @@ for (const [button, tool] of [[el.drawLineButton, "line"], [el.drawRectangleButt
 for (const input of [el.shapeFill, el.shapeFillColor, el.shapeStroke, el.shapeStrokeColor, el.shapeWidth]) {
 	input.addEventListener("change", changeShapeStyle);
 }
-el.addPageButton.addEventListener("click", () => {
+editorClick(el.addPageButton, () => {
 	const page = currentPageInfo();
 	return changeDocument("ofdgoChangePage", null, "add", state.pageIndex, page.width, page.height);
 });
-el.copyPageButton.addEventListener("click", () => changeDocument("ofdgoChangePage", null, "copy", state.pageIndex));
-el.deletePageButton.addEventListener("click", () => changeDocument("ofdgoChangePage", null, "delete", state.pageIndex));
-el.movePagePrevButton.addEventListener("click", () => changeDocument("ofdgoChangePage", null, "move", state.pageIndex, state.pageIndex - 1));
-el.movePageNextButton.addEventListener("click", () => changeDocument("ofdgoChangePage", null, "move", state.pageIndex, state.pageIndex + 1));
-el.pageSettingsButton.addEventListener("click", openPagePanel);
+editorClick(el.copyPageButton, () => changeDocument("ofdgoChangePage", null, "copy", state.pageIndex));
+editorClick(el.deletePageButton, () => changeDocument("ofdgoChangePage", null, "delete", state.pageIndex));
+editorClick(el.movePagePrevButton, () => changeDocument("ofdgoChangePage", null, "move", state.pageIndex, state.pageIndex - 1));
+editorClick(el.movePageNextButton, () => changeDocument("ofdgoChangePage", null, "move", state.pageIndex, state.pageIndex + 1));
+editorClick(el.pageSettingsButton, openPagePanel);
 el.pageCancel.addEventListener("click", () => el.pagePanel.close());
 el.pageWidth.addEventListener("input", updatePageDirection);
 el.pageHeight.addEventListener("input", updatePageDirection);
@@ -374,12 +410,15 @@ el.ofdButton.addEventListener("click", openOFDFile);
 el.newButton.addEventListener("click", openCreatePanel);
 el.createCancel.addEventListener("click", () => el.createPanel.close());
 el.createForm.addEventListener("submit", createDocument);
-el.insertTextButton.addEventListener("click", () => openInsertPanel(true));
-el.insertImageButton.addEventListener("click", () => openInsertPanel(false));
+editorClick(el.insertTextButton, toggleTextTool);
+editorClick(el.insertImageButton, () => openInsertPanel());
 el.insertCancel.addEventListener("click", () => el.insertPanel.close());
 el.insertPanel.addEventListener("close", () => { state.insertObject = null; });
 el.insertForm.addEventListener("submit", insertObject);
-el.insertFontAdd.addEventListener("click", () => openFontFile(el.fontInput));
+el.textFontAdd.addEventListener("click", () => {
+	openFontFile(el.fontInput);
+	canvasEditor.commitText();
+});
 el.saveButton.addEventListener("click", () => exportFile(true, null, "ofd"));
 el.togglePagesButton.addEventListener("click", () => toggleSidebar("pages"));
 el.toggleMetaButton.addEventListener("click", () => toggleSidebar("meta"));
@@ -665,6 +704,8 @@ async function createDocument(event) {
 		}
 		state.editing = true;
 		canvasEditor.clear();
+		delete state.textDefaults.fontChoice;
+		updateTextFonts(null, true);
 		state.selectObjects = true;
 		setPan(false);
 		state.ofdBytes = null;
@@ -691,7 +732,7 @@ async function editCanvasObject(item) {
 		return;
 	}
 	if (item.type === "ImageObject") {
-		return openInsertPanel(false, item);
+		return openInsertPanel(item);
 	}
 	if (!state.editing || document.body.hasAttribute("aria-busy") || canvasEditor.input) {
 		return;
@@ -716,42 +757,70 @@ async function editCanvasObject(item) {
 	}
 }
 
-async function openInsertPanel(text, item = null) {
+function openInsertPanel(item = null) {
 	if (!state.editing || document.body.hasAttribute("aria-busy")) {
 		return;
 	}
-	const openSeq = state.openSeq;
-	if (text && !item) {
-		await requestLocalFontsBeforeOpen();
-	}
-	if (openSeq !== state.openSeq) {
-		return;
-	}
 	el.insertForm.reset();
 	state.insertObject = item;
-	if (item && text) {
-		state.insertFonts = [];
-		el.insertText.value = item.text;
-	}
-	el.insertPanel.setAttribute("aria-label", item ? text ? "修改文字" : "替换图片" : text ? "添加文字" : "添加图片");
-	el.insertSubmit.textContent = item ? text ? "修改" : "替换" : "添加";
-	for (const [row, input] of [[el.insertTextRow, el.insertText], [el.insertFontRow, el.insertFont]]) {
-		row.hidden = !text;
-		input.disabled = !text;
-	}
-	el.insertImageRow.hidden = text;
-	el.insertImage.disabled = text;
-	updateInsertFonts();
+	el.insertPanel.setAttribute("aria-label", item ? "替换图片" : "添加图片");
+	el.insertSubmit.textContent = item ? "替换" : "添加";
+	el.insertStatus.textContent = "";
 	el.insertPanel.showModal();
-	(text ? el.insertText : el.insertImage).focus();
+	el.insertImage.focus();
 }
 
-function updateInsertFonts() {
-	const selected = state.insertFonts[Number(el.insertFont.value)];
-	state.insertFonts = editorFonts(state.insertObject?.type === "TextObject" ? state.insertObject : null);
-	setFontOptions(el.insertFont, state.insertFonts, selected);
-	el.insertSubmit.disabled = !el.insertTextRow.hidden && !state.insertFonts.length;
-	el.insertStatus.textContent = el.insertSubmit.disabled ? "尚未添加字体" : "";
+// currentTextStyle returns the selected text style or the next text box's defaults.
+function currentTextStyle() {
+	return canvasEditor.selected?.type === "TextObject" ? canvasEditor.selected : state.textDefaults;
+}
+
+// toggleTextTool places text directly on the page without creating empty document objects.
+async function toggleTextTool() {
+	if (!state.editing || document.body.hasAttribute("aria-busy")) return;
+	if (canvasEditor.tool === "text") {
+		canvasEditor.setTool("");
+		return;
+	}
+	const openSeq = state.openSeq;
+	if (!state.textFonts.length) {
+		await requestLocalFontsBeforeOpen();
+		updateTextFonts(canvasEditor.selected, true);
+	}
+	if (openSeq !== state.openSeq) return;
+	const style = currentTextStyle();
+	state.textDefaults = { type: "TextObject", size: style.size, color: style.color, wrap: style.wrap,
+		align: style.align || "left", paragraphHeight: style.paragraphHeight || 0,
+		fontChoice: state.textFonts[Number(el.textFont.value)] || state.textDefaults.fontChoice };
+	state.selectObjects = true;
+	setPan(false);
+	canvasEditor.setTool("text");
+	el.viewerPanel.focus({ preventScroll: true });
+}
+
+// beginCanvasText loads the chosen local font and starts an unsaved inline text box.
+async function beginCanvasText(index, box, surface, page) {
+	const font = state.textDefaults.fontChoice || state.textFonts[Number(el.textFont.value)];
+	if (!font) {
+		setStatus("尚未添加字体");
+		el.textFontAdd.focus();
+		return;
+	}
+	const openSeq = state.openSeq;
+	setBusy(true);
+	try {
+		const data = font.embedded ? (await callWASM("ofdgoEditorFont", font.id.slice(9))).bytes : await fontManager.read(font);
+		const face = new FontFace("ofdgo-draft", data);
+		await face.load();
+		if (openSeq !== state.openSeq || !surface.isConnected) return;
+		const node = document.createElement("div");
+		const item = { ...state.textDefaults, ...box, index, page, surface, node, text: "", draft: true, fontData: data };
+		canvasEditor.editText(item, face);
+	} catch (err) {
+		if (openSeq === state.openSeq) showError(err, false);
+	} finally {
+		if (openSeq === state.openSeq) setBusy(false);
+	}
 }
 
 function editorFonts(item) {
@@ -769,18 +838,21 @@ function setFontOptions(select, fonts, selected) {
 		const option = document.createElement("option");
 		option.value = String(index);
 		option.textContent = font.fullName || font.name;
-		option.selected = key(font) === key(selected);
 		select.append(option);
 	});
+	select.value = fonts.length ? String(Math.max(0, fonts.findIndex(font => key(font) === key(selected)))) : "";
 }
 
 function updateTextFonts(item, refresh = false) {
-	const text = item?.type === "TextObject";
-	if (refresh || state.textFonts[0]?.id !== (text ? `embedded:${item.font}` : undefined)) {
-		state.textFonts = text ? editorFonts(item) : [];
-		setFontOptions(el.textFont, state.textFonts, state.textFonts[0]);
+	const id = item?.type === "TextObject" && !item.draft ? item.font : null;
+	if (refresh || state.textFontID !== id) {
+		state.textFontID = id;
+		state.textFonts = editorFonts(id ? item : null);
+		const selected = id ? state.textFonts[0] : state.textDefaults.fontChoice;
+		if (!id && selected?.embedded) state.textFonts.unshift(selected);
+		setFontOptions(el.textFont, state.textFonts, selected || state.textFonts[0]);
+		if (!id) state.textDefaults.fontChoice = state.textFonts[Number(el.textFont.value)];
 	}
-	el.textFont.value = text ? "0" : "";
 }
 
 async function insertObject(event) {
@@ -789,7 +861,6 @@ async function insertObject(event) {
 		return;
 	}
 	let openSeq = state.openSeq;
-	const text = !el.insertTextRow.hidden;
 	const item = state.insertObject;
 	const index = item?.index ?? state.pageIndex;
 	const page = state.doc.pages[index];
@@ -798,23 +869,12 @@ async function insertObject(event) {
 	el.insertStatus.textContent = "";
 	setBusy(true);
 	try {
-		let data = null;
-		if (text) {
-			const font = state.insertFonts[Number(el.insertFont.value)];
-			if (!font.embedded) {
-				data = await fontManager.read(font);
-			}
-		} else {
-			data = new Uint8Array(await el.insertImage.files[0].arrayBuffer());
-		}
+		const data = new Uint8Array(await el.insertImage.files[0].arrayBuffer());
 		if (openSeq !== state.openSeq) {
 			return;
 		}
-		const value = item && data === null && el.insertText.value === item.text ? null : el.insertText.value;
 		const doc = item
-			? text ? await callWASM("ofdgoUpdateText", item.index, item.id, value, data, item.size, null)
-			: await callWASM("ofdgoReplaceImage", item.index, item.id, data)
-			: text ? await callWASM("ofdgoInsertText", index, el.insertText.value, data, x, y, 12 * 25.4 / 72, "#000000")
+			? await callWASM("ofdgoReplaceImage", item.index, item.id, data)
 			: await callWASM("ofdgoInsertImage", index, data, x, y, page.width - x * 2);
 		if (openSeq !== state.openSeq) {
 			return;
@@ -852,9 +912,28 @@ function textPoints(size) {
 	return Number((size * 72 / 25.4).toFixed(2));
 }
 
+// changeParagraph keeps layout in the library and only submits changed form values.
+async function changeParagraph(wrap = currentTextStyle().wrap) {
+	const item = currentTextStyle();
+	if (document.body.hasAttribute("aria-busy") || item.draft) return;
+	if (!el.textLineHeight.checkValidity()) {
+		updateObjectControls(item, true);
+		return;
+	}
+	const points = Number(el.textLineHeight.value);
+	const height = points === textPoints(item.paragraphHeight || 0) ? item.paragraphHeight || 0 : points * 25.4 / 72;
+	if (item === state.textDefaults) {
+		Object.assign(item, { wrap: Boolean(wrap), align: el.textAlign.value, paragraphHeight: height });
+		updateObjectControls(canvasEditor.selected, true);
+		return;
+	}
+	await changeDocument("ofdgoLayoutText", item, null, null, Boolean(wrap), el.textAlign.value, height);
+	updateObjectControls(canvasEditor.selected, true);
+}
+
 async function changeTextStyle(color) {
-	const item = canvasEditor.selected;
-	if (item?.type !== "TextObject" || !state.ready || state.exporting) {
+	const item = currentTextStyle();
+	if (!state.ready || state.exporting || item.draft || document.body.hasAttribute("aria-busy")) {
 		return;
 	}
 	if (!color && !el.textSize.checkValidity()) {
@@ -862,8 +941,14 @@ async function changeTextStyle(color) {
 		updateObjectControls(item, true);
 		return;
 	}
-	const size = color || Number(el.textSize.value) === textPoints(item.size) ? item.size : Number(el.textSize.value) * 25.4 / 72;
+	const size = color || Number(el.textSize.value) === Number(el.textSize.defaultValue) ? item.size : Number(el.textSize.value) * 25.4 / 72;
 	const fill = color && el.textColor.value !== item.color ? el.textColor.value : null;
+	if (item === state.textDefaults) {
+		item.size = size;
+		if (fill !== null) item.color = fill;
+		updateObjectControls(canvasEditor.selected, true);
+		return;
+	}
 	if (size !== item.size || fill !== null) {
 		await changeDocument("ofdgoUpdateText", item, color ? null : item.text, null, size, fill);
 	}
@@ -903,6 +988,7 @@ async function changeShapeStyle() {
 
 function updateDrawingControls() {
 	const tool = canvasEditor.tool;
+	el.insertTextButton.setAttribute("aria-pressed", String(tool === "text"));
 	const line = tool === "line" || !tool && canvasEditor.selected?.shape === "line";
 	if (line) {
 		el.shapeFill.checked = false;
@@ -924,6 +1010,8 @@ async function changeDocument(name, item, ...args) {
 		return;
 	}
 	let openSeq = state.openSeq;
+	const active = document.activeElement;
+	const toolbarFocus = el.editorTools.contains(active) ? active : null;
 	const previous = currentPageInfo();
 	const { scrollLeft, scrollTop } = el.viewerPanel;
 	setBusy(true);
@@ -940,14 +1028,14 @@ async function changeDocument(name, item, ...args) {
 			return true;
 		}
 		setEditorInfo(doc);
-		if (!item || name === "ofdgoDeleteObject") {
+		if (!item || name === "ofdgoDeleteObject" || name === "ofdgoDeleteObjects") {
 			canvasEditor.clear();
 		}
-		if (name === "ofdgoCopyObject" || name === "ofdgoInsertShape") {
+		if (name === "ofdgoCopyObject" || name === "ofdgoInsertShape" || name === "ofdgoInsertText") {
 			canvasEditor.selectLast = true;
 		}
 		openSeq = ++state.openSeq;
-		if (item || name === "ofdgoInsertShape") {
+		if (item || name === "ofdgoInsertShape" || name === "ofdgoInsertText") {
 			await refreshEditorPage(doc, item ? item.index : args[0], openSeq);
 		} else {
 			const samePage = doc.pages.findIndex((page) => page.id === previous.id);
@@ -959,7 +1047,7 @@ async function changeDocument(name, item, ...args) {
 				keepPreview: true, previewScroll: keepScroll ? { scrollLeft, scrollTop } : null });
 		}
 		if (openSeq === state.openSeq) {
-			el.viewerPanel.focus({ preventScroll: true });
+			if (!toolbarFocus) el.viewerPanel.focus({ preventScroll: true });
 			return true;
 		}
 	} catch (err) {
@@ -973,6 +1061,7 @@ async function changeDocument(name, item, ...args) {
 	} finally {
 		if (openSeq === state.openSeq) {
 			setBusy(false);
+			if (toolbarFocus?.isConnected && !toolbarFocus.disabled) toolbarFocus.focus({ preventScroll: true });
 		}
 	}
 }
@@ -1735,9 +1824,6 @@ async function changeFont(font, changes) {
 
 function renderFontList() {
 	updateTextFonts(canvasEditor.selected, true);
-	if (el.insertPanel.open) {
-		updateInsertFonts();
-	}
 	el.fontList.replaceChildren();
 	const fonts = fontManager.records();
 	if (!fonts.length) {
@@ -2120,7 +2206,7 @@ async function exportFile(whole, indices = null, value = el.exportFormat.value)
 	const label = archive ? "ZIP" : format.label;
 	const extension = archive ? "zip" : format.extension;
 	const mime = archive ? "application/zip" : format.mime;
-	const openSeq = state.openSeq;
+	let openSeq = state.openSeq;
 	const fileName = whole ? `${baseFileName()}.${extension}` : pageFileName(extension);
 	const pageIndex = state.pageIndex;
 	const dpi = exportFormatUsesDPI(format.value) ? currentImageDPI() : 0;
@@ -2135,6 +2221,12 @@ async function exportFile(whole, indices = null, value = el.exportFormat.value)
 		if (openSeq !== state.openSeq) {
 			return;
 		}
+		if (canvasEditor.input) {
+			setBusy(false);
+			if (!await canvasEditor.commitText()) return;
+			openSeq = state.openSeq;
+			setBusy(true, `正在生成 ${label}`, null, whole ? STATUS.exporting : STATUS.pageExporting);
+		}
 		const result = saving ? await callWASM("ofdgoSaveDocument", file) : whole
 			? await callWASM("ofdgoExportDocument", format.value, dpi, indices, file)
 			: await callWASM("ofdgoExportPage", pageIndex, format.value, dpi, file);
@@ -4033,16 +4125,28 @@ function updateEditorTools() {
 }
 
 function updateObjectControls(item, reset = false) {
-	const disabled = !item || !state.ready || state.exporting;
-	el.deleteObjectButton.disabled = el.copyObjectButton.disabled = el.objectAlign.disabled = disabled;
-	el.editObjectButton.disabled = disabled || item.type === "PathObject";
-	el.textFont.disabled = el.textSize.disabled = el.textColor.disabled = disabled || item.type !== "TextObject";
+	const disabled = !item || Boolean(item.draft) || !state.ready || state.exporting;
+	el.deleteObjectButton.disabled = el.objectAlign.disabled = disabled;
+	el.copyObjectButton.disabled = disabled || Boolean(item?.items);
+	el.editObjectButton.disabled = disabled || Boolean(item.items) || item.type === "PathObject";
+	el.multiSelectButton.disabled = !state.editing || !canvasEditor.enabled || !state.ready || state.exporting;
+	const text = item?.type === "TextObject" ? item : state.textDefaults;
+	el.textFont.disabled = el.textSize.disabled = el.textColor.disabled = !state.editing || !state.ready || state.exporting || Boolean(item?.draft || item?.items);
+	el.textFontAdd.disabled = !state.editing || !state.ready || state.exporting || Boolean(item?.draft);
+	el.textAlign.disabled = el.textWrap.disabled = el.textLineHeight.disabled = el.textSize.disabled;
+	el.textAlign.value = text.align || "left";
+	el.textWrap.setAttribute("aria-pressed", String(Boolean(text.wrap)));
+	if (reset || document.activeElement !== el.textLineHeight) {
+		el.textLineHeight.value = text.paragraphHeight ? String(textPoints(text.paragraphHeight)) : "";
+	}
 	updateTextFonts(item);
 	if (reset || el.textSize.disabled || document.activeElement !== el.textSize) {
-		el.textSize.value = item?.type === "TextObject" ? textPoints(item.size) : "";
+		el.textSize.value = document.activeElement === el.textSize ? textPoints(text.size) : Math.round(textPoints(text.size));
+		el.textSize.defaultValue = el.textSize.value;
 	}
+	el.textSize.title = `字号 ${textPoints(text.size)} pt`;
 	if (reset || el.textColor.disabled || document.activeElement !== el.textColor) {
-		el.textColor.value = item?.type === "TextObject" ? item.color : "#000000";
+		el.textColor.value = text.color;
 	}
 	if (item?.type === "PathObject") {
 		el.shapeFill.checked = item.fill;
@@ -4054,7 +4158,7 @@ function updateObjectControls(item, reset = false) {
 		}
 	}
 	updateDrawingControls();
-	el.objectOrder.disabled = disabled || item.count <= 1;
+	el.objectOrder.disabled = disabled || Boolean(item.items) || item.count <= 1;
 	for (const option of el.objectOrder.options) {
 		option.disabled = disabled || (["up", "top"].includes(option.value) ? item.order === item.count - 1 : item.order === 0);
 	}

assets/webui/ofdgo_edit.js

@@ -30,6 +30,13 @@ export function objectTransform(box, page, dx, dy, corner = "") {
 	return { x: left ? box.width * (1 - scale) : 0, y: top ? box.height * (1 - scale) : 0, scale };
 }
 
+// selectionBounds keeps same-page objects together without changing their relative positions.
+export function selectionBounds(items) {
+	const x = Math.min(...items.map(item => item.x)), y = Math.min(...items.map(item => item.y));
+	return { x, y, width: Math.max(...items.map(item => item.x + item.width)) - x,
+		height: Math.max(...items.map(item => item.y + item.height)) - y };
+}
+
 // constrainedPoint applies drawing constraints before clipping the endpoint to the page.
 export function constrainedPoint(from, to, page, shape, shift) {
 	let dx = to.x - from.x, dy = to.y - from.y;
@@ -95,6 +102,7 @@ export class CanvasEditor {
 		this.options = options;
 		this.enabled = false;
 		this.selected = null;
+		this.multiple = false;
 		this.nodes = new WeakMap();
 		this.pages = new WeakMap();
 		this.tool = "";
@@ -107,7 +115,7 @@ export class CanvasEditor {
 		viewer.addEventListener("keyup", (event) => this.modifierChange(event));
 		viewer.addEventListener("dblclick", () => {
 			const item = this.selected;
-			if (this.enabled && item && !this.input && !this.options.busy()) {
+			if (this.enabled && item && !item.items && !this.input && !this.options.busy()) {
 				this.options.onEdit(item);
 			}
 		});
@@ -136,6 +144,8 @@ export class CanvasEditor {
 	}
 
 	mount(index, page, surface) {
+		const selected = this.items().filter(item => item.index === index).map(item => item.id);
+		const selection = [];
 		this.pages.set(surface, { index, width: page.width, height: page.height });
 		const layer = document.createElement("div");
 		layer.className = "edit-layer";
@@ -152,7 +162,8 @@ export class CanvasEditor {
 			this.nodes.set(node, item);
 			node.addEventListener("focus", () => this.select(item));
 			const handles = object.shape === "line" ? ["start", "end"]
-				: object.shape ? ["nw", "n", "ne", "e", "se", "s", "sw", "w"] : ["nw", "ne", "sw", "se"];
+				: object.shape ? ["nw", "n", "ne", "e", "se", "s", "sw", "w"]
+					: object.type === "TextObject" ? ["nw", "ne", "e", "se", "sw", "w"] : ["nw", "ne", "sw", "se"];
 			for (const corner of handles) {
 				const handle = document.createElement("span");
 				handle.className = `edit-handle edit-${corner}`;
@@ -161,11 +172,12 @@ export class CanvasEditor {
 			}
 			this.place(item);
 			layer.append(node);
-			if (this.selected?.index === index && this.selected.id === object.id) {
-				this.select(item);
+			if (selected.includes(object.id)) {
+				selection.push(item);
 			}
 		}
 		surface.append(layer);
+		if (selected.length) this.setSelection(selection);
 		if (this.selectLast && layer.lastElementChild) {
 			this.selectLast = false;
 			this.select(this.nodes.get(layer.lastElementChild));
@@ -173,6 +185,10 @@ export class CanvasEditor {
 	}
 
 	place(item, change = { x: 0, y: 0, scale: 1 }) {
+		if (item.items) {
+			for (const member of item.items) this.place(member, change);
+			return;
+		}
 		if (item.shape) {
 			this.placeShape(item, { x: item.geometry.x + change.x, y: item.geometry.y + change.y,
 				width: item.geometry.width * change.scale, height: item.geometry.height * change.scale });
@@ -200,11 +216,34 @@ export class CanvasEditor {
 		}
 	}
 
-	select(item) {
-		this.selected?.node.classList.remove("selected");
-		this.selected = item;
-		item?.node.classList.add("selected");
-		this.options.onSelect(item);
+	// items returns the current selection without treating a group as a document object.
+	items() {
+		return this.selected?.items || (this.selected ? [this.selected] : []);
+	}
+
+	// setSelection updates object highlights and exposes one same-page selection to the toolbar.
+	setSelection(items) {
+		for (const item of this.items()) {
+			item.node.classList.remove("selected", "multi-selected");
+			item.node.setAttribute("aria-pressed", "false");
+		}
+		this.selected = items.length < 2 ? items[0] || null : { ...selectionBounds(items), items,
+			id: items.map(item => item.id), index: items[0].index, page: items[0].page, surface: items[0].surface };
+		for (const item of items) {
+			item.node.classList.add("selected");
+			item.node.classList.toggle("multi-selected", items.length > 1);
+			item.node.setAttribute("aria-pressed", "true");
+		}
+		this.options.onSelect(this.selected);
+	}
+
+	select(item, add = false) {
+		if (!add || !item || this.selected && item.index !== this.selected.index) {
+			this.setSelection(item ? [item] : []);
+			return;
+		}
+		const items = this.items();
+		this.setSelection(items.includes(item) ? items.filter(member => member !== item) : [...items, item]);
 	}
 
 	clear() {
@@ -216,6 +255,7 @@ export class CanvasEditor {
 
 	start(event) {
 		if (this.input) {
+			if (event.target !== this.input.input) this.commitText();
 			return;
 		}
 		if (!this.enabled || this.options.busy() || event.button !== 0 || this.drag) {
@@ -230,13 +270,23 @@ export class CanvasEditor {
 			event.preventDefault();
 		}
 		this.viewer.focus({ preventScroll: true });
-		this.select(node ? this.nodes.get(node) : null);
+		const target = node ? this.nodes.get(node) : null;
+		const additive = event.shiftKey || event.ctrlKey || event.metaKey || this.multiple;
+		if (!target) {
+			this.startMarquee(event, additive);
+			return;
+		}
+		if (additive && !event.target.dataset.corner) {
+			this.select(target, true);
+			return;
+		}
+		if (!this.items().includes(target)) this.select(target);
 		if (!node || this.options.busy()) {
 			return;
 		}
 		const item = this.selected;
 		this.drag = {
-			item, pointerID: event.pointerId, corner: event.target.dataset.corner || "",
+			item, pointerID: event.pointerId, corner: item.items ? "" : event.target.dataset.corner || "",
 			rect: item.surface.getBoundingClientRect(), rotation: this.options.rotation(),
 			clientX: event.clientX, clientY: event.clientY,
 		};
@@ -259,11 +309,20 @@ export class CanvasEditor {
 			this.moveShape(event, drag);
 			return;
 		}
+		if (drag.marquee) {
+			this.moveMarquee(event, drag);
+			return;
+		}
 		if (!drag.change && !drag.box && Math.hypot(event.clientX - drag.clientX, event.clientY - drag.clientY) < 3) {
 			return;
 		}
 		const from = pagePoint(drag.clientX, drag.clientY, drag.rect, drag.item.page, drag.rotation);
 		const to = pagePoint(event.clientX, event.clientY, drag.rect, drag.item.page, drag.rotation);
+		if (drag.item.type === "TextObject" && (drag.corner === "w" || drag.corner === "e")) {
+			drag.box = reshapeBox({ geometry: drag.item, page: drag.item.page }, to.x - from.x, 0, drag.corner, false);
+			Object.assign(drag.item.node.style, { left: `${drag.box.x * PX_PER_MM}px`, width: `${drag.box.width * PX_PER_MM}px` });
+			return;
+		}
 		if (drag.item.shape && drag.corner) {
 			drag.box = reshapeBox(drag.item, to.x - from.x, to.y - from.y, drag.corner, event.shiftKey);
 			this.placeShape(drag.item, drag.box || drag.item.geometry);
@@ -280,9 +339,25 @@ export class CanvasEditor {
 			return;
 		}
 		this.move(event);
+		if (drag.marquee) {
+			this.drag = null;
+			drag.preview.remove();
+			this.viewer.releasePointerCapture(drag.pointerID);
+			return;
+		}
 		if (drag.shape) {
 			this.drag = null;
 			this.viewer.releasePointerCapture(drag.pointerID);
+			if (drag.shape === "text") {
+				const from = pagePoint(drag.clientX, drag.clientY, drag.rect, drag.page, drag.rotation);
+				const x = Math.max(0, Math.min(from.x, drag.page.width - 1));
+				const y = Math.max(0, Math.min(from.y, drag.page.height - 1));
+				const box = drag.box || { x, y, width: Math.min(80, drag.page.width - x), height: 5 };
+				drag.preview.remove();
+				this.setTool("");
+				this.options.onDrawText(drag.page.index, box, drag.surface, drag.page);
+				return;
+			}
 			if (!drag.box) {
 				drag.preview.remove();
 				return;
@@ -292,13 +367,15 @@ export class CanvasEditor {
 				.finally(() => drag.preview.remove());
 			return;
 		}
-		if (drag.item.shape && drag.corner) {
+		if ((drag.item.shape || drag.item.type === "TextObject") && drag.corner && drag.box) {
 			this.drag = null;
 			this.viewer.releasePointerCapture(drag.pointerID);
-			const changed = drag.box && Object.keys(drag.box).some((key) => drag.box[key] !== drag.item.geometry[key]);
-			Promise.resolve(changed && this.options.onReshape(drag.item, drag.box)).finally(() => {
+			const geometry = drag.item.geometry || drag.item;
+			const changed = Object.keys(drag.box).some((key) => drag.box[key] !== geometry[key]);
+			const apply = drag.item.shape ? this.options.onReshape : this.options.onTextWidth;
+			Promise.resolve(changed && apply(drag.item, drag.box)).finally(() => {
 				drag.preview?.remove();
-				this.placeShape(drag.item, drag.item.geometry);
+				this.place(drag.item);
 			});
 			return;
 		}
@@ -313,6 +390,7 @@ export class CanvasEditor {
 		this.drag = null;
 		if (drag) {
 			drag.preview?.remove();
+			if (drag.marquee) this.setSelection(drag.before);
 			if (drag.item) {
 				this.place(drag.item);
 			}
@@ -322,6 +400,41 @@ export class CanvasEditor {
 		}
 	}
 
+	// startMarquee selects by page-space geometry, so rotation and zoom use the same hit tests.
+	startMarquee(event, additive) {
+		const surface = event.target.closest(".page-surface"), page = this.pages.get(surface);
+		if (!page) {
+			this.select(null);
+			return;
+		}
+		event.preventDefault();
+		const before = this.items();
+		const base = additive ? before.filter(item => item.index === page.index) : [];
+		this.setSelection(base);
+		this.drag = { marquee: true, page, surface, before, base,
+			...this.createPreview(surface, page, "rectangle", { fill: true, fillColor: "var(--accent-soft)", stroke: true, strokeColor: "var(--accent)", lineWidth: 0.2 }),
+			pointerID: event.pointerId, clientX: event.clientX, clientY: event.clientY,
+			rect: surface.getBoundingClientRect(), rotation: this.options.rotation() };
+		this.viewer.setPointerCapture(event.pointerId);
+	}
+
+	// moveMarquee includes intersecting objects while preserving an additive selection.
+	moveMarquee(event, drag) {
+		const from = pagePoint(drag.clientX, drag.clientY, drag.rect, drag.page, drag.rotation);
+		const to = constrainedPoint(from, pagePoint(event.clientX, event.clientY, drag.rect, drag.page, drag.rotation), drag.page, "rectangle", false);
+		const box = { x: Math.min(from.x, to.x), y: Math.min(from.y, to.y), width: Math.abs(to.x-from.x), height: Math.abs(to.y-from.y) };
+		paintShape(drag.node, "rectangle", box);
+		if (Math.hypot(event.clientX-drag.clientX, event.clientY-drag.clientY) < 3) return;
+		const items = [...drag.base];
+		for (const node of drag.surface.querySelectorAll(".edit-object")) {
+			const item = this.nodes.get(node);
+			if (!items.includes(item) && item.x <= box.x+box.width && item.x+item.width >= box.x && item.y <= box.y+box.height && item.y+item.height >= box.y) {
+				items.push(item);
+			}
+		}
+		this.setSelection(items);
+	}
+
 	startShape(event) {
 		const surface = event.target.closest(".page-surface");
 		const page = this.pages.get(surface);
@@ -336,7 +449,7 @@ export class CanvasEditor {
 			style.fill = false;
 			style.stroke = true;
 		}
-		this.drag = { shape, page, ...this.createPreview(surface, page, shape, style), style, pointerID: event.pointerId,
+		this.drag = { shape, page, surface, ...this.createPreview(surface, page, shape === "text" ? "rectangle" : shape, style), style, pointerID: event.pointerId,
 			rect: surface.getBoundingClientRect(), rotation: this.options.rotation(),
 			clientX: event.clientX, clientY: event.clientY };
 		this.viewer.setPointerCapture(event.pointerId);
@@ -362,15 +475,15 @@ export class CanvasEditor {
 			return { x: Math.max(0, Math.min(p.x, drag.page.width)), y: Math.max(0, Math.min(p.y, drag.page.height)) };
 		};
 		const from = point(drag.clientX, drag.clientY);
-		const to = constrainedPoint(from, pagePoint(event.clientX, event.clientY, drag.rect, drag.page, drag.rotation), drag.page, drag.shape, event.shiftKey);
+		const to = constrainedPoint(from, pagePoint(event.clientX, event.clientY, drag.rect, drag.page, drag.rotation), drag.page, drag.shape, event.shiftKey && drag.shape !== "text");
 		const x = Math.min(from.x, to.x), y = Math.min(from.y, to.y);
-		const width = Math.abs(to.x - from.x), height = Math.abs(to.y - from.y);
+		const width = Math.abs(to.x - from.x), height = drag.shape === "text" ? Math.max(5, Math.abs(to.y - from.y)) : Math.abs(to.y - from.y);
 		const valid = Math.hypot(event.clientX - drag.clientX, event.clientY - drag.clientY) >= 3
 			&& (drag.shape === "line" ? width > 0 || height > 0 : width > 0 && height > 0);
 		drag.box = valid ? drag.shape === "line"
 			? { x: from.x, y: from.y, width: to.x - from.x, height: to.y - from.y }
 			: { x, y, width, height } : null;
-		paintShape(drag.node, drag.shape, drag.shape === "line"
+		paintShape(drag.node, drag.shape === "text" ? "rectangle" : drag.shape, drag.shape === "line"
 			? { x: from.x, y: from.y, width: to.x - from.x, height: to.y - from.y } : { x, y, width, height });
 	}
 
@@ -384,7 +497,14 @@ export class CanvasEditor {
 	}
 
 	keyDown(event) {
+		if (event.defaultPrevented || event.target?.closest("input, textarea, select, [contenteditable]")) return;
 		this.modifierChange(event);
+		if (event.key === "Escape" && this.drag && !this.tool && !this.options.busy()) {
+			event.preventDefault();
+			event.stopPropagation();
+			this.cancel();
+			return;
+		}
 		if (event.key === "Escape" && this.tool && !this.options.busy()) {
 			event.preventDefault();
 			event.stopPropagation();
@@ -405,9 +525,9 @@ export class CanvasEditor {
 			this.drag ? this.cancel() : this.clear();
 		} else if (event.key === "Delete") {
 			this.options.onDelete(this.selected);
-		} else if (edit && !this.drag) {
+		} else if (edit && !this.drag && !this.selected.items) {
 			this.options.onEdit(this.selected);
-		} else if (!this.drag) {
+		} else if (!this.drag && directions[event.key]) {
 			const [x, y] = directions[event.key];
 			const [dx, dy] = [[x, y], [y, -x], [-x, -y], [-y, x]][this.options.rotation() / 90];
 			const step = event.shiftKey ? 10 : 1;
@@ -427,15 +547,16 @@ export class CanvasEditor {
 		const input = document.createElement("textarea");
 		input.className = "edit-text";
 		input.setAttribute("aria-label", "编辑文字");
-		input.wrap = "off";
+		input.wrap = item.wrap ? "soft" : "off";
 		input.spellcheck = false;
 		input.value = item.text;
 		Object.assign(input.style, {
 			left: `${item.x * PX_PER_MM}px`, top: `${item.y * PX_PER_MM}px`,
-			width: `${Math.max(item.width, Math.min(50, item.page.width - item.x)) * PX_PER_MM + 4}px`,
+			width: `${(item.wrap ? item.width : Math.max(item.width, Math.min(50, item.page.width - item.x))) * PX_PER_MM + 4}px`,
 			minHeight: `${item.height * PX_PER_MM + 4}px`,
 			fontFamily: `"${face.family}"`, fontSize: `${item.size * PX_PER_MM}px`,
-			lineHeight: item.lineHeight ? `${item.lineHeight * PX_PER_MM}px` : "normal", color: item.color,
+			lineHeight: item.paragraphHeight || item.lineHeight ? `${(item.paragraphHeight || item.lineHeight) * PX_PER_MM}px` : "normal", color: item.color,
+			textAlign: item.align || "left",
 		});
 		this.input = { input, item, face };
 		item.surface.append(input);
@@ -464,22 +585,21 @@ export class CanvasEditor {
 		});
 		resize();
 		input.focus({ preventScroll: true });
-		input.select();
+		if (!item.draft) input.select();
 	}
 
 	async commitText() {
 		const editing = this.input;
-		if (!editing || editing.input.readOnly) {
-			return;
-		}
-		if (editing.input.value === editing.item.text) {
+		if (!editing) return true;
+		if (editing.input.readOnly) return false;
+		if (editing.input.value === editing.item.text || editing.item.draft && !editing.input.value.trim()) {
 			this.closeText();
-			return;
+			return true;
 		}
 		editing.input.readOnly = true;
 		const saved = await this.options.onCommitText(editing.item, editing.input.value);
 		if (this.input !== editing) {
-			return;
+			return Boolean(saved);
 		}
 		if (saved) {
 			this.closeText();
@@ -487,6 +607,7 @@ export class CanvasEditor {
 			editing.input.readOnly = false;
 			editing.input.focus({ preventScroll: true });
 		}
+		return Boolean(saved);
 	}
 
 	closeText() {
@@ -495,6 +616,7 @@ export class CanvasEditor {
 		if (editing) {
 			editing.input.remove();
 			document.fonts.delete(editing.face);
+			if (editing.item.draft && this.selected === editing.item) this.select(null);
 			this.options.onTextChange();
 		}
 	}

go.mod

@@ -3,6 +3,7 @@ module github.com/xiaoqidun/ofdgo
 go 1.26.0
 
 require (
+	github.com/go-text/typesetting v0.3.4
 	github.com/tdewolff/canvas v0.0.0-20260913163248-dd4999d1c76a
 	github.com/tdewolff/font v0.0.0-20260913163313-54f98bb59ee6
 	github.com/xiaoqidun/jbig2 v1.0.0
@@ -23,7 +24,6 @@ require (
 	github.com/benoitkugler/textlayout v0.3.2 // indirect
 	github.com/benoitkugler/textprocessing v0.0.6 // indirect
 	github.com/go-fonts/latin-modern v0.3.3 // indirect
-	github.com/go-text/typesetting v0.3.4 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/kolesa-team/go-webp v1.0.5 // indirect
 	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect

internal/webui/wasm.go

@@ -109,6 +109,10 @@ func RunWASM() {
 	registerCallback("ofdgoAlignObject", alignObject)
 	registerCallback("ofdgoTransformObject", transformObject)
 	registerCallback("ofdgoReshapeObject", reshapeObject)
+	registerCallback("ofdgoLayoutText", layoutText)
+	registerCallback("ofdgoTransformObjects", transformObjects)
+	registerCallback("ofdgoAlignObjects", alignObjects)
+	registerCallback("ofdgoDeleteObjects", deleteObjects)
 	registerCallback("ofdgoCopyObject", copyObject)
 	registerCallback("ofdgoMoveObject", moveObject)
 	registerCallback("ofdgoDeleteObject", deleteObject)
@@ -574,9 +578,7 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 		return nil, err
 	}
 	textBoxes := make(map[string]ofdgo.Box)
-	textValues := make(map[string]string)
 	for _, run := range text.Runs {
-		textValues[run.ID] += run.Text
 		for _, box := range run.Boxes {
 			if box.W <= 0 || box.H <= 0 {
 				continue
@@ -636,7 +638,20 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 					item["lineWidth"] = path.LineWidth * editorPathScale(path)
 				}
 				if object.Type == "TextObject" {
-					item["text"], item["font"], item["fontName"], item["size"] = textValues[id], object.TextObject.Font, fontNames[object.TextObject.Font], object.TextObject.Size
+					source, err := currentEditor.Object(index, id)
+					if err != nil {
+						return nil, err
+					}
+					value, layout := source.TextObject.TextLayout()
+					item["text"], item["font"], item["fontName"], item["size"] = value, object.TextObject.Font, fontNames[object.TextObject.Font], object.TextObject.Size
+					item["wrap"], item["align"], item["paragraphHeight"] = layout.Wrap, layout.Align, layout.LineHeight
+					if layout.Wrap {
+						frame, err := ofdgo.ParseBox(object.TextObject.Boundary)
+						if err != nil {
+							return nil, err
+						}
+						item["x"], item["y"], item["width"], item["height"] = frame.X, frame.Y, frame.W, math.Max(object.TextObject.Size, box.Y+box.H-frame.Y)
+					}
 					if codes := object.TextObject.TextCode; len(codes) > 1 {
 						first, _ := strconv.ParseFloat(codes[0].Y, 64)
 						second, _ := strconv.ParseFloat(codes[1].Y, 64)
@@ -932,7 +947,8 @@ func updateText(args []js.Value) (any, error) {
 			}
 		}
 		object.TextObject.Size = args[4].Float()
-		if err := currentEditor.LayoutText(&object.TextObject, args[2].String(), 0); err != nil {
+		_, layout := object.TextObject.TextLayout()
+		if err := currentEditor.LayoutText(&object.TextObject, args[2].String(), layout); err != nil {
 			return nil, err
 		}
 	}
@@ -1077,7 +1093,7 @@ func updatePathStyle(args []js.Value) (any, error) {
 }
 
 // insertText 使用选定字体创建文字对象
-// 入参: args 页码、内容、字体数据、横纵坐标、字号和颜色
+// 入参: args 页码、内容、字体数据、横纵坐标、字号、颜色、框宽、折行、对齐和行距
 // 返回: any 文档信息, error 错误信息
 func insertText(args []js.Value) (any, error) {
 	if currentEditor == nil {
@@ -1101,12 +1117,16 @@ func insertText(args []js.Value) (any, error) {
 		return nil, err
 	}
 	x, y := args[3].Float(), args[4].Float()
-	box = ofdgo.Box{X: x, Y: y, W: box.W - x, H: box.H - y}
+	width := args[7].Float()
+	if width == 0 {
+		width = 80
+	}
+	box = ofdgo.Box{X: x, Y: y, W: math.Min(width, box.W-x), H: box.H - y}
 	object := ofdgo.GraphicObject{Type: "TextObject", TextObject: ofdgo.TextObject{
 		Boundary: fmt.Sprintf("%g %g %g %g", box.X, box.Y, box.W, box.H),
 		Font:     fontID, Size: args[5].Float(),
 	}}
-	if err := currentEditor.LayoutText(&object.TextObject, args[1].String(), 0); err != nil {
+	if err := currentEditor.LayoutText(&object.TextObject, args[1].String(), ofdgo.TextLayout{Wrap: args[8].Bool(), Align: args[9].String(), LineHeight: args[10].Float()}); err != nil {
 		return nil, err
 	}
 	if err := setTextColor(&object.TextObject, args[6].String()); err != nil {
@@ -1118,6 +1138,88 @@ func insertText(args []js.Value) (any, error) {
 	return previewEditor(currentEditor, currentSession.Renderer.RenderAnnotations)
 }
 
+// layoutText 调整文字框和段落排版，保留软换行前的原文。
+// 入参: args 页码、对象标识、左侧坐标、宽度、折行、对齐和行距
+// 返回: any 文档信息, error 错误信息
+func layoutText(args []js.Value) (any, error) {
+	if currentEditor == nil {
+		return nil, fmt.Errorf("no document is being created")
+	}
+	page, id := args[0].Int(), args[1].String()
+	object, err := currentEditor.Object(page, id)
+	if err != nil {
+		return nil, err
+	}
+	if object.Type != "TextObject" {
+		return nil, fmt.Errorf("object is not text")
+	}
+	box, err := ofdgo.ParseBox(object.TextObject.Boundary)
+	if err != nil {
+		return nil, err
+	}
+	if !args[2].IsNull() {
+		box.X, box.W = args[2].Float(), args[3].Float()
+	}
+	object.TextObject.Boundary = fmt.Sprintf("%g %g %g %g", box.X, box.Y, box.W, box.H)
+	value, _ := object.TextObject.TextLayout()
+	if err := currentEditor.LayoutText(&object.TextObject, value, ofdgo.TextLayout{Wrap: args[4].Bool(), Align: args[5].String(), LineHeight: args[6].Float()}); err != nil {
+		return nil, err
+	}
+	revision := currentEditor.Revision()
+	if err := currentEditor.UpdateObject(page, id, object); err != nil {
+		return nil, err
+	}
+	if currentEditor.Revision() == revision {
+		return editorSummary(), nil
+	}
+	return previewEditor(currentEditor, currentSession.Renderer.RenderAnnotations)
+}
+
+// selectedIDs 读取多选对象标识，交由库统一校验。
+func selectedIDs(value js.Value) []string {
+	ids := make([]string, value.Length())
+	for i := range ids {
+		ids[i] = value.Index(i).String()
+	}
+	return ids
+}
+
+// transformObjects 统一移动或缩放选区，生成一次撤销记录。
+func transformObjects(args []js.Value) (any, error) {
+	return changeObjects(func() error {
+		return currentEditor.TransformObjects(args[0].Int(), selectedIDs(args[1]), args[2].Float(), args[3].Float(), args[4].Float())
+	})
+}
+
+// alignObjects 对齐选区中的对象。
+func alignObjects(args []js.Value) (any, error) {
+	return changeObjects(func() error {
+		return currentEditor.AlignObjects(args[0].Int(), selectedIDs(args[1]), args[2].String())
+	})
+}
+
+// deleteObjects 一次删除选区中的对象。
+func deleteObjects(args []js.Value) (any, error) {
+	return changeObjects(func() error {
+		return currentEditor.DeleteObjects(args[0].Int(), selectedIDs(args[1]))
+	})
+}
+
+// changeObjects 提交库层批量操作，无修改时复用当前预览。
+func changeObjects(apply func() error) (any, error) {
+	if currentEditor == nil {
+		return nil, fmt.Errorf("no document is being created")
+	}
+	revision := currentEditor.Revision()
+	if err := apply(); err != nil {
+		return nil, err
+	}
+	if currentEditor.Revision() == revision {
+		return editorSummary(), nil
+	}
+	return previewEditor(currentEditor, currentSession.Renderer.RenderAnnotations)
+}
+
 // insertImage 按原始比例创建图片对象
 // 入参: args 页码、图片数据、横纵坐标和宽度
 // 返回: any 文档信息, error 错误信息

ofdgo_editor.go

@@ -105,6 +105,11 @@ func (e *Editor) Page(index int) (*PageContent, error) {
 		return nil, err
 	}
 	result.ID = page.ID
+	for i, layer := range page.Content.Layer {
+		for j, object := range layer.Objects {
+			result.Content.Layer[i].Objects[j].TextObject.layout = object.TextObject.layout
+		}
+	}
 	return &result, nil
 }
 
@@ -593,6 +598,7 @@ func (e *Editor) prepareObject(id string, object GraphicObject) (GraphicObject,
 // 入参: object 对象内容
 // 返回: GraphicObject 独立副本, error 错误信息
 func cloneEditorObject(object GraphicObject) (GraphicObject, error) {
+	layout := object.TextObject.layout
 	data, err := encodeOFDXML(func(x *ofdXML) { x.object(object, true) })
 	if err != nil {
 		return GraphicObject{}, err
@@ -610,6 +616,7 @@ func cloneEditorObject(object GraphicObject) (GraphicObject, error) {
 	if err := xml.Unmarshal(data, target); err != nil {
 		return GraphicObject{}, err
 	}
+	object.TextObject.layout = layout
 	return object, nil
 }
 
@@ -621,14 +628,14 @@ func (e *Editor) AddText(page int, box Box, value, fontID string, size float64)
 		Boundary: fmt.Sprintf("%s %s %s %s", ofdNumber(box.X), ofdNumber(box.Y), ofdNumber(box.W), ofdNumber(box.H)),
 		Font:     fontID, Size: size,
 	}}
-	if err := e.LayoutText(&object.TextObject, value, 0); err != nil {
+	if err := e.LayoutText(&object.TextObject, value, TextLayout{}); err != nil {
 		return "", err
 	}
 	return e.AddObject(page, object)
 }
 
-// UpdateText 按AddText规则重排横向文字，保留对象标识、顺序、边界及绘制属性
-// 自定义文字定位使用UpdateObject，不进行段落排版和复杂文字塑形
+// UpdateText 按现有段落选项重排横向文字，保留对象标识、顺序、边界及绘制属性
+// 自定义文字定位使用UpdateObject，不进行复杂文字塑形
 // 入参: page 页面索引, id 文字对象标识, value 原文, fontID 字体资源标识, size 字号
 // 返回: error 错误信息
 func (e *Editor) UpdateText(page int, id, value, fontID string, size float64) error {
@@ -641,7 +648,8 @@ func (e *Editor) UpdateText(page int, id, value, fontID string, size float64) er
 		return fmt.Errorf("object %q is not text", id)
 	}
 	object.TextObject.Font, object.TextObject.Size = fontID, size
-	if err := e.LayoutText(&object.TextObject, value, 0); err != nil {
+	_, layout := object.TextObject.TextLayout()
+	if err := e.LayoutText(&object.TextObject, value, layout); err != nil {
 		return err
 	}
 	object, err = e.prepareObject(id, object)
@@ -656,16 +664,11 @@ func (e *Editor) UpdateText(page int, id, value, fontID string, size float64) er
 // 入参: page 页面索引, id 对象标识, dx 横向位移, dy 纵向位移, scale 正缩放比例
 // 返回: error 错误信息
 func (e *Editor) TransformObject(page int, id string, dx, dy, scale float64) error {
-	if !finite(dx) || !finite(dy) || !finite(scale) || scale <= 0 {
-		return fmt.Errorf("transform requires finite offsets and a positive finite scale")
-	}
-	object, err := e.Object(page, id)
-	if err != nil {
-		return err
-	}
-	if dx == 0 && dy == 0 && scale == 1 {
-		return nil
-	}
+	return e.TransformObjects(page, []string{id}, dx, dy, scale)
+}
+
+// transformEditorObject 变换独立对象副本，保留绘制属性和编辑中的段落信息。
+func transformEditorObject(object GraphicObject, dx, dy, scale float64) (GraphicObject, error) {
 	var boundary, ctm *string
 	switch object.Type {
 	case "TextObject":
@@ -673,6 +676,11 @@ func (e *Editor) TransformObject(page int, id string, dx, dy, scale float64) err
 		boundary, ctm = &obj.Boundary, &obj.CTM
 		if scale != 1 {
 			obj.Size *= scale
+			if obj.layout != nil {
+				layout := *obj.layout
+				layout.options.LineHeight *= scale
+				obj.layout = &layout
+			}
 			if obj.LineWidth == 0 && obj.Stroke != nil && *obj.Stroke {
 				obj.LineWidth = defaultPathLineWidth
 			}
@@ -691,7 +699,7 @@ func (e *Editor) TransformObject(page int, id string, dx, dy, scale float64) err
 	}
 	box, err := ParseBox(*boundary)
 	if err != nil {
-		return err
+		return GraphicObject{}, err
 	}
 	*boundary = fmt.Sprintf("%s %s %s %s", ofdNumber(box.X*scale+dx), ofdNumber(box.Y*scale+dy), ofdNumber(box.W*scale), ofdNumber(box.H*scale))
 	if scale != 1 && (*ctm != "" || object.Type != "TextObject") {
@@ -701,7 +709,7 @@ func (e *Editor) TransformObject(page int, id string, dx, dy, scale float64) err
 		}
 		*ctm = fmt.Sprintf("%s %s %s %s %s %s", ofdNumber(m.a), ofdNumber(m.b), ofdNumber(m.c), ofdNumber(m.d), ofdNumber(m.e*scale), ofdNumber(m.f*scale))
 	}
-	return e.UpdateObject(page, id, object)
+	return object, nil
 }
 
 // ReplaceImage 替换图片资源，保留对象位置、尺寸、变换和绘制顺序
@@ -726,59 +734,7 @@ func (e *Editor) ReplaceImage(page int, id string, data []byte) error {
 // 入参: page 页面索引, id 对象标识, alignment 为left、center、right、top、middle或bottom
 // 返回: error 错误信息
 func (e *Editor) AlignObject(page int, id, alignment string) error {
-	if !slices.Contains([]string{"left", "center", "right", "top", "middle", "bottom"}, alignment) {
-		return fmt.Errorf("invalid alignment %q", alignment)
-	}
-	object, err := e.Object(page, id)
-	if err != nil {
-		return err
-	}
-	content := &e.pages[page]
-	pageBox, _ := ParseBox(content.Area.PhysicalBox)
-	var box Box
-	switch object.Type {
-	case "TextObject":
-		reader, err := e.Reader()
-		if err != nil {
-			return err
-		}
-		defer reader.Close()
-		renderer := NewRenderer(reader)
-		text, err := renderer.PageText(content)
-		if err != nil {
-			return err
-		}
-		for _, run := range text.Runs {
-			if run.ID == id {
-				for _, bounds := range run.Boxes {
-					box = unionTextBox(box, bounds)
-				}
-			}
-		}
-	case "PathObject":
-		box, _ = ParseBox(object.PathObject.Boundary)
-	case "ImageObject":
-		box, _ = ParseBox(object.ImageObject.Boundary)
-	}
-	if box.W <= 0 || box.H <= 0 {
-		return fmt.Errorf("object %q has no visible bounds", id)
-	}
-	dx, dy := 0.0, 0.0
-	switch alignment {
-	case "left":
-		dx = -box.X
-	case "center":
-		dx = (pageBox.W-box.W)/2 - box.X
-	case "right":
-		dx = pageBox.W - box.W - box.X
-	case "top":
-		dy = -box.Y
-	case "middle":
-		dy = (pageBox.H-box.H)/2 - box.Y
-	case "bottom":
-		dy = pageBox.H - box.H - box.Y
-	}
-	return e.TransformObject(page, id, dx, dy, 1)
+	return e.AlignObjects(page, []string{id}, alignment)
 }
 
 // scaleTextNumbers 缩放已校验的文字定位数值，保留g重复编码
@@ -796,11 +752,11 @@ func scaleTextNumbers(value string, scale float64) string {
 	return strings.Join(fields, " ")
 }
 
-// LayoutText 按显式换行和嵌入字体度量重排横向文字，保留绘制属性
-// 不自动折行或进行复杂文字塑形，不修改文档，通过AddObject或UpdateObject提交
-// 入参: obj 文字对象, value 原文, lineHeight 基线间距，0使用字体度量，单位为毫米
+// LayoutText 按嵌入字体度量和段落选项重排横向文字，保留绘制属性，不进行复杂文字塑形
+// 不修改文档，通过AddObject或UpdateObject提交；选项仅供当前编辑过程使用，保存为标准文字定位
+// 入参: obj 文字对象, value 原文, options 段落排版选项
 // 返回: error 错误信息
-func (e *Editor) LayoutText(obj *TextObject, value string, lineHeight float64) error {
+func (e *Editor) LayoutText(obj *TextObject, value string, options TextLayout) error {
 	if obj.ReadDirection != 0 || obj.CharDirection != 0 {
 		return fmt.Errorf("automatic text layout requires horizontal text")
 	}
@@ -815,9 +771,21 @@ func (e *Editor) LayoutText(obj *TextObject, value string, lineHeight float64) e
 	if !utf8.ValidString(value) || strings.Contains(value, "\t") || strings.Trim(value, "\n") == "" {
 		return fmt.Errorf("text must contain UTF-8 characters without tabs")
 	}
+	lineHeight := options.LineHeight
 	if !finite(lineHeight) || lineHeight < 0 {
 		return fmt.Errorf("line height must be finite and nonnegative")
 	}
+	if !slices.Contains([]string{"", "left", "center", "right", "justify"}, options.Align) {
+		return fmt.Errorf("invalid text alignment %q", options.Align)
+	}
+	var width float64
+	if options.Wrap || options.Align != "" && options.Align != "left" {
+		box, err := creationBox(obj.Boundary)
+		if err != nil {
+			return err
+		}
+		width = box.W
+	}
 	hScale := obj.HScale
 	if hScale == 0 {
 		hScale = 1
@@ -827,31 +795,35 @@ func (e *Editor) LayoutText(obj *TextObject, value string, lineHeight float64) e
 	if lineHeight == 0 {
 		lineHeight = math.Max(obj.Size, float64(int(ascender)-int(descender)+int(gap))*unit)
 	}
-	lines := strings.Split(value, "\n")
-	codes := make([]TextCode, len(lines))
-	for line, value := range lines {
-		runes := []rune(value)
-		deltas := make([]string, 0, max(0, len(runes)-1))
+	var codes []TextCode
+	for _, paragraph := range strings.Split(value, "\n") {
+		runes := []rune(paragraph)
+		advances := make([]float64, len(runes))
 		for i, char := range runes {
 			glyph := sfnt.GlyphIndex(char)
 			if glyph == 0 {
 				return fmt.Errorf("font does not contain U+%04X", char)
 			}
-			if i+1 < len(runes) {
-				advance := float64(sfnt.GlyphAdvance(glyph)) * unit * hScale
-				if !finite(advance) {
-					return fmt.Errorf("text advance exceeds finite range")
-				}
-				deltas = append(deltas, ofdNumber(advance))
+			advances[i] = float64(sfnt.GlyphAdvance(glyph)) * unit * hScale
+			if !finite(advances[i]) {
+				return fmt.Errorf("text advance exceeds finite range")
 			}
 		}
-		y := float64(ascender)*unit + float64(line)*lineHeight
-		if !finite(y) {
-			return fmt.Errorf("text baseline exceeds finite range")
+		lines := breakTextLines(runes, advances, width, options.Wrap)
+		for i, line := range lines {
+			x, deltas := alignTextLine(runes[line[0]:line[1]], advances[line[0]:line[1]], width, options.Align, i+1 < len(lines))
+			y := float64(ascender)*unit + float64(len(codes))*lineHeight
+			if !finite(x) || !finite(y) {
+				return fmt.Errorf("text position exceeds finite range")
+			}
+			codes = append(codes, TextCode{X: ofdNumber(x), Y: ofdNumber(y), DeltaX: deltas, Value: escapeOFDText(string(runes[line[0]:line[1]]))})
 		}
-		codes[line] = TextCode{X: "0", Y: ofdNumber(y), DeltaX: strings.Join(deltas, " "), Value: escapeOFDText(value)}
 	}
 	obj.TextCode = codes
+	obj.layout = nil
+	if options != (TextLayout{}) {
+		obj.layout = &textLayout{value: value, options: options}
+	}
 	return nil
 }
 

ofdgo_editor_batch.go

@@ -0,0 +1,226 @@
+// 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"
+	"reflect"
+	"slices"
+)
+
+// UpdateObjects 原子替换同页对象，按各对象ID定位，全部校验通过后提交一次历史记录。
+// 入参: page 页面索引, objects 新对象内容，ID不得重复
+// 返回: error 错误信息
+func (e *Editor) UpdateObjects(page int, objects []GraphicObject) error {
+	ids := make([]string, len(objects))
+	for i, object := range objects {
+		ids[i] = editorObjectID(object)
+	}
+	before, indexes, err := e.selectedObjects(page, ids)
+	if err != nil {
+		return err
+	}
+	after := make([]GraphicObject, len(objects))
+	for i, object := range objects {
+		after[i], err = e.prepareObject(ids[i], object)
+		if err != nil {
+			return err
+		}
+	}
+	if reflect.DeepEqual(before, after) {
+		return nil
+	}
+	apply := func(e *Editor, objects []GraphicObject) {
+		for i, index := range indexes {
+			e.pages[page].Content.Layer[0].Objects[index] = objects[i]
+		}
+	}
+	apply(e, after)
+	if change := e.recordChange(); change != nil {
+		change.undo = func(e *Editor) { apply(e, before) }
+		change.redo = func(e *Editor) { apply(e, after) }
+	}
+	return nil
+}
+
+// TransformObjects 同页对象以页面原点等比缩放后统一平移，保持相对位置，一次撤销恢复全部。
+// 入参: page 页面索引, ids 对象标识, dx、dy 位移, scale 正缩放比例
+// 返回: error 错误信息
+func (e *Editor) TransformObjects(page int, ids []string, dx, dy, scale float64) error {
+	if !finite(dx) || !finite(dy) || !finite(scale) || scale <= 0 {
+		return fmt.Errorf("transform requires finite offsets and a positive finite scale")
+	}
+	objects, _, err := e.selectedObjects(page, ids)
+	if err != nil {
+		return err
+	}
+	if dx == 0 && dy == 0 && scale == 1 {
+		return nil
+	}
+	for i, object := range objects {
+		object, err = cloneEditorObject(object)
+		if err != nil {
+			return err
+		}
+		objects[i], err = transformEditorObject(object, dx, dy, scale)
+		if err != nil {
+			return err
+		}
+	}
+	return e.UpdateObjects(page, objects)
+}
+
+// AlignObjects 单对象对齐页面，多对象相互对齐至选区边界，文字采用实际字形范围。
+// 入参: page 页面索引, ids 对象标识, alignment 为left、center、right、top、middle或bottom
+// 返回: error 错误信息
+func (e *Editor) AlignObjects(page int, ids []string, alignment string) error {
+	if !slices.Contains([]string{"left", "center", "right", "top", "middle", "bottom"}, alignment) {
+		return fmt.Errorf("invalid alignment %q", alignment)
+	}
+	objects, _, err := e.selectedObjects(page, ids)
+	if err != nil || len(objects) == 0 {
+		return err
+	}
+	boxes, err := e.objectBounds(page, objects)
+	if err != nil {
+		return err
+	}
+	target, _ := ParseBox(e.pages[page].Area.PhysicalBox)
+	if len(objects) > 1 {
+		target = Box{}
+		for _, box := range boxes {
+			target = unionTextBox(target, box)
+		}
+	}
+	for i, box := range boxes {
+		dx, dy := 0.0, 0.0
+		switch alignment {
+		case "left":
+			dx = target.X - box.X
+		case "center":
+			dx = target.X + (target.W-box.W)/2 - box.X
+		case "right":
+			dx = target.X + target.W - box.W - box.X
+		case "top":
+			dy = target.Y - box.Y
+		case "middle":
+			dy = target.Y + (target.H-box.H)/2 - box.Y
+		case "bottom":
+			dy = target.Y + target.H - box.H - box.Y
+		}
+		objects[i], err = cloneEditorObject(objects[i])
+		if err != nil {
+			return err
+		}
+		objects[i], err = transformEditorObject(objects[i], dx, dy, 1)
+		if err != nil {
+			return err
+		}
+	}
+	return e.UpdateObjects(page, objects)
+}
+
+// DeleteObjects 原子删除同页对象，保留其余对象顺序，一次撤销恢复全部。
+// 入参: page 页面索引, ids 对象标识
+// 返回: error 错误信息
+func (e *Editor) DeleteObjects(page int, ids []string) error {
+	_, indexes, err := e.selectedObjects(page, ids)
+	if err != nil || len(indexes) == 0 {
+		return err
+	}
+	before := e.pages[page].Content.Layer[0].Objects
+	after := slices.Clone(before)
+	slices.Sort(indexes)
+	for _, index := range slices.Backward(indexes) {
+		after = slices.Delete(after, index, index+1)
+	}
+	e.pages[page].Content.Layer[0].Objects = slices.Clone(after)
+	if change := e.recordChange(); change != nil {
+		change.undo = func(e *Editor) { e.pages[page].Content.Layer[0].Objects = slices.Clone(before) }
+		change.redo = func(e *Editor) { e.pages[page].Content.Layer[0].Objects = slices.Clone(after) }
+	}
+	return nil
+}
+
+// selectedObjects 校验同页选择，返回内部只读对象与对应索引。
+func (e *Editor) selectedObjects(page int, ids []string) ([]GraphicObject, []int, error) {
+	if _, err := e.page(page); err != nil {
+		return nil, nil, err
+	}
+	objects := make([]GraphicObject, len(ids))
+	indexes := make([]int, len(ids))
+	seen := make(map[string]bool, len(ids))
+	for i, id := range ids {
+		if seen[id] {
+			return nil, nil, fmt.Errorf("duplicate object %q", id)
+		}
+		seen[id] = true
+		layer, index, err := e.findObject(page, id)
+		if err != nil {
+			return nil, nil, err
+		}
+		objects[i], indexes[i] = layer.Objects[index], index
+	}
+	return objects, indexes, nil
+}
+
+// editorObjectID 获取可创作对象的标准标识。
+func editorObjectID(object GraphicObject) string {
+	switch object.Type {
+	case "TextObject":
+		return object.TextObject.ID
+	case "PathObject":
+		return object.PathObject.ID
+	case "ImageObject":
+		return object.ImageObject.ID
+	}
+	return ""
+}
+
+// objectBounds 批量获取对齐范围，每页只度量一次文字。
+func (e *Editor) objectBounds(page int, objects []GraphicObject) ([]Box, error) {
+	textBoxes := make(map[string]Box)
+	if slices.ContainsFunc(objects, func(o GraphicObject) bool { return o.Type == "TextObject" }) {
+		reader, err := e.Reader()
+		if err != nil {
+			return nil, err
+		}
+		defer reader.Close()
+		text, err := NewRenderer(reader).PageText(&e.pages[page])
+		if err != nil {
+			return nil, err
+		}
+		for _, run := range text.Runs {
+			for _, box := range run.Boxes {
+				textBoxes[run.ID] = unionTextBox(textBoxes[run.ID], box)
+			}
+		}
+	}
+	boxes := make([]Box, len(objects))
+	for i, object := range objects {
+		switch object.Type {
+		case "TextObject":
+			boxes[i] = textBoxes[object.TextObject.ID]
+		case "PathObject":
+			boxes[i], _ = ParseBox(object.PathObject.Boundary)
+		case "ImageObject":
+			boxes[i], _ = ParseBox(object.ImageObject.Boundary)
+		}
+		if boxes[i].W <= 0 || boxes[i].H <= 0 {
+			return nil, fmt.Errorf("object %q has no visible bounds", editorObjectID(object))
+		}
+	}
+	return boxes, nil
+}

ofdgo_editor_text.go

@@ -0,0 +1,138 @@
+// 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 (
+	"strings"
+
+	"github.com/go-text/typesetting/segmenter"
+)
+
+// TextLayout 横向段落选项，Wrap按Boundary宽度折行，Align为left、center、right或justify。
+// LineHeight为毫米单位的基线间距，0使用字体度量；零值保持显式换行和左对齐。
+type TextLayout struct {
+	Wrap       bool
+	Align      string
+	LineHeight float64
+}
+
+// textLayout 保存编辑中的原文与选项，不写入OFD，也不参与渲染。
+type textLayout struct {
+	value   string
+	options TextLayout
+}
+
+// TextLayout 获取最近一次排版的原文与选项，区分软换行和显式换行。
+// 信息仅在当前编辑过程保留，读取OFD时返回定位后的文字和默认选项。
+// 返回: string 原文, TextLayout 排版选项
+func (obj TextObject) TextLayout() (string, TextLayout) {
+	if obj.layout != nil {
+		return obj.layout.value, obj.layout.options
+	}
+	return obj.Text(), TextLayout{}
+}
+
+// breakTextLines 优先使用Unicode断行机会，过长词仅在字素边界折行，不丢弃空白。
+func breakTextLines(runes []rune, advances []float64, width float64, wrap bool) [][2]int {
+	if !wrap || len(runes) == 0 {
+		return [][2]int{{0, len(runes)}}
+	}
+	var seg segmenter.Segmenter
+	seg.Init(runes)
+	breaks := make([]bool, len(runes)+1)
+	for it := seg.LineIterator(); it.Next(); {
+		line := it.Line()
+		breaks[line.Offset+len(line.Text)] = true
+	}
+	var ends []int
+	for it := seg.GraphemeIterator(); it.Next(); {
+		cluster := it.Grapheme()
+		ends = append(ends, cluster.Offset+len(cluster.Text))
+	}
+	sums := make([]float64, len(runes)+1)
+	for i, advance := range advances {
+		sums[i+1] = sums[i] + advance
+	}
+	var lines [][2]int
+	for start, cursor := 0, 0; start < len(runes); {
+		end, legal, next := start, start, cursor
+		for next < len(ends) {
+			candidate := ends[next]
+			visible := candidate
+			for visible > start && runes[visible-1] == ' ' {
+				visible--
+			}
+			if sums[visible]-sums[start] > width && end > start {
+				break
+			}
+			end = candidate
+			next++
+			if breaks[end] {
+				legal = end
+			}
+			if sums[visible]-sums[start] > width {
+				break
+			}
+		}
+		if end < len(runes) && legal > start {
+			end = legal
+		}
+		lines = append(lines, [2]int{start, end})
+		start = end
+		for cursor < len(ends) && ends[cursor] <= start {
+			cursor++
+		}
+	}
+	return lines
+}
+
+// alignTextLine 将段落对齐转换为标准X和DeltaX，两端对齐保留段落末行左对齐。
+func alignTextLine(runes []rune, advances []float64, width float64, alignment string, justify bool) (float64, string) {
+	end := len(runes)
+	for end > 0 && runes[end-1] == ' ' {
+		end--
+	}
+	length := 0.0
+	for _, advance := range advances[:end] {
+		length += advance
+	}
+	x, extra := 0.0, max(0, width-length)
+	if alignment == "center" {
+		x = extra / 2
+	} else if alignment == "right" {
+		x = extra
+	}
+	gaps := make(map[int]bool)
+	if alignment == "justify" && justify && extra > 0 {
+		var seg segmenter.Segmenter
+		seg.Init(runes[:end])
+		for it := seg.LineIterator(); it.Next(); {
+			line := it.Line()
+			at := line.Offset + len(line.Text)
+			if at < end {
+				gaps[at-1] = true
+			}
+		}
+	}
+	deltas := make([]string, max(0, len(runes)-1))
+	for i := range deltas {
+		advance := advances[i]
+		if gaps[i] {
+			advance += extra / float64(len(gaps))
+		}
+		deltas[i] = ofdNumber(advance)
+	}
+	return x, strings.Join(deltas, " ")
+}

ofdgo_page.go

@@ -107,6 +107,7 @@ type TextObject struct {
 	TextCode      []TextCode    `xml:"TextCode"`
 	Clips         *Clips        `xml:"Clips"`
 	Actions       []Action      `xml:"Actions>Action"`
+	layout        *textLayout
 }
 
 // FillColor 填充颜色

ofdgo_text.go

@@ -25,7 +25,7 @@ import (
 	"github.com/tdewolff/font"
 )
 
-// Text 获取文字原文，同一行起点处的基线变化以换行分隔，字形索引以占位字符表示
+// Text 获取定位后的文字，横向换行以换行符分隔，字形索引以占位字符表示
 // 返回: string 原文
 func (obj TextObject) Text() string {
 	var text strings.Builder
@@ -42,7 +42,7 @@ func (obj TextObject) Text() string {
 	return text.String()
 }
 
-// textCodeLineBreak 判断横向文本是否回到行首并更换基线
+// textCodeLineBreak 判断横向文字的行首回退，或有足够行距且水平范围重叠的对齐段落
 // 入参: index 文本编码索引
 // 返回: bool 是否换行
 func (obj TextObject) textCodeLineBreak(index int) bool {
@@ -54,7 +54,21 @@ func (obj TextObject) textCodeLineBreak(index int) bool {
 	start, es := strconv.ParseFloat(obj.TextCode[0].X, 64)
 	y, ey := strconv.ParseFloat(code.Y, 64)
 	prev, ep := strconv.ParseFloat(previous.Y, 64)
-	return ex == nil && es == nil && ey == nil && ep == nil && x == start && y != prev
+	if ex != nil || es != nil || ey != nil || ep != nil {
+		return false
+	}
+	if x == start && y != prev {
+		return true
+	}
+	left, err := strconv.ParseFloat(previous.X, 64)
+	if err != nil || obj.Size <= 0 || y-prev < obj.Size/2 || previous.DeltaY != "" || code.DeltaY != "" {
+		return false
+	}
+	right := left + obj.Size
+	for _, dx := range previous.GetDeltaX() {
+		right += dx
+	}
+	return x <= right
 }
 
 // textGlyph 绘制字形