diff --git a/assets/webui/ofdgo.js b/assets/webui/ofdgo.js
index 6647d11..bf85b00 100644
--- a/assets/webui/ofdgo.js
+++ b/assets/webui/ofdgo.js
@@ -705,7 +705,7 @@ el.editorTools.addEventListener("scroll", () => fontPicker.position());
 const canvasEditor = new CanvasEditor(el.viewerPanel, {
 	textControls: [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,
-	textClipboardScope: () => `${documentTab().id}:${state.wasmSeq}:${state.fileName}:${state.doc?.documents?.[state.doc.documentIndex || 0]?.root}:${state.doc?.documentIndex || 0}:${state.doc?.documentVersion || ""}`,
+	textClipboardScope: () => `${documentTab().id}:${state.wasmSeq}:${state.fileName}:${state.doc?.documents?.[state.doc.documentIndex || 0]?.root}:${state.doc?.documentIndex || 0}:${state.doc?.documentVersion || ""}:${state.editorInfo?.revision ?? ""}`,
 	getTextClipboard: () => workspace.textClipboard,
 	setTextClipboard: clipboard => { workspace.textClipboard = clipboard; },
 	scrollBy: (x, y) => { el.viewerPanel.scrollLeft += x; pageView.scrollViewerBy(y); },
@@ -10848,11 +10848,19 @@ function resetSearch(clearInput = true) {
 async function refreshSearchPages(pages, openSeq) {
 	const tab = documentTab(), target = tab.state, query = target.searchQuery;
 	if (!query || target.searchRunning || target.searchTruncated) { resetSearch(false); return; }
-	const seq = ++target.searchSeq;
+	pages = pages.filter(page => page < target.searchNext);
+	if (!pages.length) return;
+	const seq = ++target.searchSeq, next = target.searchNext;
 	target.searchRunning = true;
-	const selected = target.searchMatches[target.searchIndex];
+	const previous = target.searchMatches, selected = previous[target.searchIndex];
+	target.searchNext = Math.min(...pages);
+	target.searchMatches = previous.filter(match => match.page < target.searchNext);
+	target.searchIndex = target.searchMatches.indexOf(selected);
+	el.searchResults.replaceChildren();
+	clearSearchHighlights();
+	renderSearchResults();
 	try {
-		const matches = target.searchMatches.filter(match => !pages.includes(match.page));
+		const matches = previous.filter(match => !pages.includes(match.page));
 		for (const page of pages) {
 			const result = await callTabWASM(tab, "ofdgoSearchPage", page, query, SEARCH_MATCH_LIMIT - matches.length + 1);
 			if (tab.closed || target.openSeq !== openSeq || target.searchSeq !== seq) return;
@@ -10864,6 +10872,8 @@ async function refreshSearchPages(pages, openSeq) {
 		}
 		matches.sort((a,b) => a.page - b.page);
 		target.searchMatches = matches;
+		target.searchNext = next;
+		target.searchPaused = false;
 		target.searchIndex = selected ? matches.indexOf(selected) : -1;
 		if (isForegroundDocument(tab)) {
 			el.searchResults.replaceChildren();
@@ -10874,8 +10884,7 @@ async function refreshSearchPages(pages, openSeq) {
 		}
 	} catch (err) {
 		if (target.openSeq === openSeq && target.searchSeq === seq) {
-			target.searchQuery = "";
-			if (isForegroundDocument(tab)) { resetSearch(false); showError(err, false); }
+			if (isForegroundDocument(tab)) { el.searchStatus.textContent = "搜索失败"; showError(err, false); }
 		}
 	} finally {
 		if (target.searchSeq === seq) target.searchRunning = false;
@@ -12616,6 +12625,7 @@ function showError(err, empty = !state.doc) {
 
 function setBusy(busy, text = "", percent = 0, status = "", tab = documentTab()) {
 	busy ||= Boolean(tab.editTask || operationRequest(tab));
+	const resumeSearch = tab.busy && !busy && tab.state.searchPaused;
 	tab.busy = busy;
 	if (text) tab.progress = {text, percent};
 	if (status) tab.status = status;
@@ -12657,6 +12667,9 @@ function setBusy(busy, text = "", percent = 0, status = "", tab = documentTab())
 	el.fontList.inert = busy;
 	el.docFontList.inert = busy;
 	if (!busy) {
+		if (resumeSearch) queueMicrotask(() => {
+			if (isForegroundDocument(tab) && !tab.busy && !tab.refreshPending && tab.state.searchPaused) searchDocument();
+		});
 		el.progressPanel.hidden = !state.saving;
 		if (state.saving) {
 			el.cancelExportButton.hidden = false;
diff --git a/assets/webui/ofdgo_edit.js b/assets/webui/ofdgo_edit.js
index a9d2cb6..35c376e 100644
--- a/assets/webui/ofdgo_edit.js
+++ b/assets/webui/ofdgo_edit.js
@@ -71,6 +71,32 @@ function sliceRuns(runs, start, end) {
 	});
 }
 
+function textChange(before, after) {
+	const sameFormat = (a, b) => a && b && FORMAT_KEYS.every(key => a.format[key] === b.format[key]);
+	let first = 0, lastBefore = before.length - 1, lastAfter = after.length - 1, start = 0;
+	let endBefore = before.reduce((length, run) => length + run.text.length, 0);
+	let endAfter = after.reduce((length, run) => length + run.text.length, 0);
+	while (sameFormat(before[first], after[first]) && before[first].text === after[first].text) start += before[first++].text.length;
+	while (lastBefore >= first && lastAfter >= first && sameFormat(before[lastBefore], after[lastAfter]) && before[lastBefore].text === after[lastAfter].text) {
+		endBefore -= before[lastBefore--].text.length;
+		endAfter -= after[lastAfter--].text.length;
+	}
+	if (first <= lastBefore && first <= lastAfter && sameFormat(before[first], after[first])) {
+		const left = before[first].text, right = after[first].text;
+		let count = 0;
+		while (count < left.length && count < right.length && left[count] === right[count]) count++;
+		start += count;
+	}
+	if (first <= lastBefore && first <= lastAfter && sameFormat(before[lastBefore], after[lastAfter])) {
+		const left = before[lastBefore].text, right = after[lastAfter].text;
+		let count = 0;
+		while (count < Math.min(left.length, right.length, endBefore - start, endAfter - start) && left[left.length - count - 1] === right[right.length - count - 1]) count++;
+		endBefore -= count;
+		endAfter -= count;
+	}
+	return { start, before: sliceRuns(before, start, endBefore), after: sliceRuns(after, start, endAfter) };
+}
+
 export class RichTextSession {
 	constructor(editor, model, faces = new Map(), imports = [], resources = new Map()) {
 		this.editor = editor;
@@ -127,9 +153,10 @@ export class RichTextSession {
 		this.selection();
 		this.entries[this.index].caret = [...this.caret];
 	}
-	record(change) {
+	record(before) {
+		const change = textChange(before, this.model.runs);
 		const entry = { change, typing: { ...this.typing }, caret: [...this.caret] }, old = this.entries[this.index];
-		const changed = change && JSON.stringify(change.before) !== JSON.stringify(change.after);
+		const changed = change.before.length || change.after.length;
 		if (!changed && JSON.stringify(entry.typing) === JSON.stringify(old.typing)) return;
 		if (!changed) entry.change = null;
 		this.entries.splice(++this.index, Infinity, entry);
@@ -174,7 +201,7 @@ export class RichTextSession {
 		if (this.editing.composing || this.editing.saving) return;
 		this.remember();
 		const [start, end] = this.selection();
-		const before = sliceRuns(this.model.runs, start, end);
+		const before = this.model.runs;
 		this.caret = this.caret[0] > this.caret[1] ? [end, start] : [start, end];
 		if (start !== end) this.model.runs = normalizeRuns([
 			...sliceRuns(this.model.runs, 0, start),
@@ -182,19 +209,19 @@ export class RichTextSession {
 			...sliceRuns(this.model.runs, end, this.text.length),
 		]);
 		this.typing = { ...this.typing, ...values };
-		this.record({ start, before, after: sliceRuns(this.model.runs, start, end) });
+		this.record(before);
 		this.render();
 		this.editor.options.onTextChange();
 	}
 	replace(runs) {
 		this.remember();
 		const [start, end] = this.selection();
-		const before = sliceRuns(this.model.runs, start, end);
+		const before = this.model.runs;
 		this.model.runs = normalizeRuns([...sliceRuns(this.model.runs, 0, start), ...runs, ...sliceRuns(this.model.runs, end, this.text.length)]);
 		this.caret = [start + runs.reduce((length, run) => length + run.text.length, 0)];
 		this.caret.push(this.caret[0]);
 		if (runs.length) this.typing = { ...runs.at(-1).format };
-		this.record({ start, before, after: sliceRuns(this.model.runs, start, this.caret[0]) });
+		this.record(before);
 		this.render();
 		this.editor.options.onTextChange();
 	}
@@ -214,12 +241,12 @@ export class RichTextSession {
 			while (end > start && nextEnd > start && previous[end - 1] === value[nextEnd - 1]) { end--; nextEnd--; }
 			if (end < previous.length && /[\uDC00-\uDFFF]/.test(previous[end])) { end++; nextEnd++; }
 		}
-		const removed = sliceRuns(this.model.runs, start, end);
+		const runs = this.model.runs;
 		this.model.runs = normalizeRuns([...sliceRuns(this.model.runs, 0, start),
 			{ text: value.slice(start, nextEnd), format: { ...this.typing } }, ...sliceRuns(this.model.runs, end, previous.length)]);
 		this.caret = caret;
 		this.beforeCaret = null;
-		this.record({ start, before: removed, after: sliceRuns(this.model.runs, start, nextEnd) });
+		this.record(runs);
 		this.render();
 	}
 	copy(event, cut = false) {
@@ -257,7 +284,7 @@ export class RichTextSession {
 				if (this.editor.input !== this.editing || this.editing.composing || this.editing.saving || this.model.runs !== original || this.selection().join() !== caret.join()) return;
 			}
 			for (const [key, data] of copy.fonts) this.imports.set(keys.get(key), data);
-			for (const [key, face] of faces) { this.faces.set(keys.get(key), face); document.fonts.add(face); }
+			for (const [key, face] of faces) if (!this.faces.has(keys.get(key))) { this.faces.set(keys.get(key), face); document.fonts.add(face); }
 			for (const [key, choice] of copy.choices) this.choices.set(keys.get(key), choice);
 			runs = copy.runs.map(run => ({ text: run.text, format: { ...run.format, font: keys.get(run.format.font) } }));
 		}
@@ -1834,12 +1861,12 @@ export class CanvasEditor {
 			session.model.runs = normalizeRuns([{ text: entry.value, format }]);
 			session.typing = { ...format };
 			session.caret = entry.caret || caret;
-			session.record({ start: 0, before, after: session.model.runs });
+			session.record(before);
 		}
 		const before = session.model.runs;
 		session.model.runs = normalizeRuns([{ text: value, format }]);
 		session.caret = caret;
-		session.record({ start: 0, before, after: session.model.runs });
+		session.record(before);
 		editing.rich = session;
 		editing.source = false;
 		document.removeEventListener("selectionchange", editing.selectionListener);