feat(编辑能力): 优化复杂文档编辑性能，保持渲染一致

assets/webui/ofdgo_edit.js

@@ -307,8 +307,8 @@ export class CanvasEditor {
 		const crop = this.crop?.item.index === index ? this.crop : null;
 		if (crop) this.closeCrop(true);
 		const pending = this.pendingSelection?.index === index;
-		const selected = pending ? this.pendingSelection.ids || page.objects.slice(-1).map(item => item.id)
+		const selected = new Set(pending ? this.pendingSelection.ids || page.objects.slice(-1).map(item => item.id)
-			: this.items().filter(item => item.index === index).map(item => item.id);
+			: 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");
@@ -359,24 +359,14 @@ export class CanvasEditor {
 			}
 			this.nodes.set(node, item);
 			node.addEventListener("focus", () => this.select(item));
-			const handles = !canEditObject(object, "transform") ? [] : lineShape(object.shape) ? ["start", "end"]
-				: object.shape || object.oriented || canEditObject(object, "stretch") ? ["nw", "n", "ne", "e", "se", "s", "sw", "w"]
-					: object.type === "TextObject" && canEditObject(object, "reflow") && canEditObject(object, "layoutKnown")
-						? ["nw", "n", "ne", "e", "se", "s", "sw", "w"] : ["nw", "ne", "sw", "se"];
-			for (const corner of handles) {
-				const handle = document.createElement("span");
-				handle.className = `edit-handle edit-${corner}`;
-				handle.dataset.corner = corner;
-				node.append(handle);
-			}
 			this.place(item);
 			layer.append(node);
-			if (selected.includes(object.id)) {
+			if (selected.has(object.id)) {
 				selection.push(item);
 			}
 		}
 		surface.append(layer);
-		if (selected.length) this.setSelection(selection);
+		if (selected.size) this.setSelection(selection);
 		if (pending) this.pendingSelection = null;
 		if (crop && selection.length === 1 && selection[0].id === crop.item.id
 			&& ["x", "y", "width", "height"].every(key => selection[0][key] === crop.item[key])) {
@@ -487,6 +477,9 @@ export class CanvasEditor {
 		for (const item of this.items()) {
 			item.node.classList.remove("selected", "multi-selected");
 			item.node.setAttribute("aria-pressed", "false");
+			for (const handle of [...item.node.children]) {
+				if (handle.dataset.corner) handle.remove();
+			}
 		}
 		this.selected = items.length < 2 ? items[0] || null : { ...selectionBounds(items), items,
 			id: items.map(item => item.id), index: items[0].index, page: items[0].page, surface: items[0].surface };
@@ -503,6 +496,19 @@ export class CanvasEditor {
 			this.nodes.set(node, this.selected);
 			this.place(this.selected);
 			this.selected.surface.append(node);
+		} else if (items.length === 1) {
+			const item = items[0];
+			const handles = !canEditObject(item, "transform") ? [] : lineShape(item.shape) ? ["start", "end"]
+				: item.shape || item.oriented || canEditObject(item, "stretch") ? ["nw", "n", "ne", "e", "se", "s", "sw", "w"]
+					: item.type === "TextObject" && canEditObject(item, "reflow") && canEditObject(item, "layoutKnown")
+						? ["nw", "n", "ne", "e", "se", "s", "sw", "w"] : ["nw", "ne", "sw", "se"];
+			for (const corner of handles) {
+				const handle = document.createElement("span");
+				handle.className = `edit-handle edit-${corner}`;
+				handle.dataset.corner = corner;
+				item.node.append(handle);
+			}
+			this.place(item);
 		}
 		for (const item of items) {
 			item.node.classList.add("selected");

internal/webui/wasm.go

@@ -732,6 +732,10 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 	if err != nil {
 		return nil, err
 	}
+	info, err := currentEditor.PageObjectInfo(index)
+	if err != nil {
+		return nil, err
+	}
 	textBoxes := make(map[string]ofdgo.Box)
 	for _, run := range text.Runs {
 		for _, box := range run.Boxes {
@@ -770,10 +774,7 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 			default:
 				continue
 			}
-			capability, err := currentEditor.ObjectCapabilities(index, id)
+			capability := info[id].Capabilities
-			if err != nil {
-				return nil, err
-			}
 			var box ofdgo.Box
 			var contours []ofdgo.ObjectContour
 			switch object.Type {
@@ -786,10 +787,7 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 				continue
 			}
 			if box.W > 0 && box.H > 0 {
-				position, err := currentEditor.ObjectPosition(index, id)
+				position := info[id].Position
-				if err != nil {
-					return nil, err
-				}
 				item := map[string]any{"id": id, "type": object.Type, "x": box.X, "y": box.Y, "width": box.W, "height": box.H, "order": order, "position": position.Index, "count": position.Count, "container": position.Container,
 					"capabilities": editorCapabilities(capability, object.Type)}
 				editorAppearance(item, object, capability.Paint, editorPathScale(object.PathObject))

ofdgo_editor_batch.go

@@ -144,6 +144,53 @@ type ObjectPosition struct {
 	Count     int
 }
 
+// ObjectInfo 对象的编辑能力及直接容器位置
+type ObjectInfo struct {
+	Capabilities ObjectCapabilities
+	Position     ObjectPosition
+}
+
+// PageObjectInfo 批量获取页面对象能力与位置，不重复扫描同一容器
+// 每次按当前页面计算，变更和撤销后无需失效旧缓存
+// 入参: page 页面索引
+// 返回: map[string]ObjectInfo 对象标识与信息, error 错误信息
+func (e *Editor) PageObjectInfo(page int) (map[string]ObjectInfo, error) {
+	content, err := e.page(page)
+	if err != nil {
+		return nil, err
+	}
+	result := make(map[string]ObjectInfo)
+	orderable := make(map[*editorXML]bool)
+	for i := range content.Content.Layer {
+		layer := &content.Content.Layer[i]
+		nodes := e.objectOrderNodes(page, layer)
+		groups := make(map[*editorXML][]string)
+		for _, object := range layer.Objects {
+			id := editorObjectID(object)
+			parent := e.objectOrderParent(nodes, id)
+			groups[parent] = append(groups[parent], id)
+			if id != "" {
+				result[id] = ObjectInfo{Capabilities: e.objectCapabilities(object, orderable)}
+			}
+		}
+		for parent, ids := range groups {
+			container := layer.ID
+			if parent != nil {
+				container = parent.attr("ID")
+			}
+			for index, id := range ids {
+				if id == "" {
+					continue
+				}
+				info := result[id]
+				info.Position = ObjectPosition{Layer: layer.ID, Container: container, Index: index, Count: len(ids)}
+				result[id] = info
+			}
+		}
+	}
+	return result, nil
+}
+
 // ObjectPosition 获取对象的直接容器及排序位置
 // 入参: page 页面索引, id 对象标识
 // 返回: ObjectPosition 对象位置, error 错误信息
@@ -170,36 +217,44 @@ func (e *Editor) ObjectPosition(page int, id string) (ObjectPosition, error) {
 // 入参: page 页面索引, layer 图层, id 对象标识
 // 返回: *editorXML 原始容器, []int 对象索引
 func (e *Editor) objectOrderIndexes(page int, layer *Layer, id string) (*editorXML, []int) {
-	var nodes map[string]*editorXML
+	nodes := e.objectOrderNodes(page, layer)
-	var parent *editorXML
+	parent := e.objectOrderParent(nodes, id)
-	if e.originalPage(page) {
-		source := e.source.pages[e.pages[page].ID]
-		if slices.ContainsFunc(source.original.Content.Layer, func(original Layer) bool { return original.ID == layer.ID }) {
-			nodes = source.nodes
-		}
-	}
-	if nodes != nil {
-		if node := nodes[id]; node != nil {
-			parent = node.parent
-		} else if origin := e.objectOrigin(id); origin != nil {
-			parent = origin.node.parent
-		}
-	}
 	var indexes []int
 	for i, object := range layer.Objects {
-		node := nodes[editorObjectID(object)]
+		if e.objectOrderParent(nodes, editorObjectID(object)) == parent {
-		if node == nil && nodes != nil {
-			if origin := e.objectOrigin(editorObjectID(object)); origin != nil {
-				node = origin.node
-			}
-		}
-		if node == nil && parent == nil || node != nil && node.parent == parent {
 			indexes = append(indexes, i)
 		}
 	}
 	return parent, indexes
 }
 
+// objectOrderNodes 获取原图层中的对象节点
+// 入参: page 页面索引, layer 当前图层
+// 返回: map[string]*editorXML 原节点映射
+func (e *Editor) objectOrderNodes(page int, layer *Layer) map[string]*editorXML {
+	if e.originalPage(page) {
+		source := e.source.pages[e.pages[page].ID]
+		if slices.ContainsFunc(source.original.Content.Layer, func(original Layer) bool { return original.ID == layer.ID }) {
+			return source.nodes
+		}
+	}
+	return nil
+}
+
+// objectOrderParent 获取对象的原始直接容器，新对象沿用所在图层
+// 入参: nodes 原节点映射, id 对象标识
+// 返回: *editorXML 原始容器
+func (e *Editor) objectOrderParent(nodes map[string]*editorXML, id string) *editorXML {
+	if nodes != nil {
+		if node := nodes[id]; node != nil {
+			return node.parent
+		} else if origin := e.objectOrigin(id); origin != nil {
+			return origin.node.parent
+		}
+	}
+	return nil
+}
+
 // OrderObjects 调整同一图层或页块内选区的绘制顺序，保留各组选中及未选中对象的相对顺序
 // 入参: page 页面索引, ids 对象标识, order 为up、down、top或bottom
 // 返回: error 错误信息

ofdgo_editor_open.go

@@ -367,7 +367,14 @@ func (e *Editor) ObjectCapabilities(page int, id string) (ObjectCapabilities, er
 	if err != nil {
 		return ObjectCapabilities{}, err
 	}
-	object := layer.Objects[index]
+	return e.objectCapabilities(layer.Objects[index], make(map[*editorXML]bool)), nil
+}
+
+// objectCapabilities 检查对象能力，在同次遍历中复用原容器排序检查
+// 入参: object 当前对象, orderable 原容器排序能力
+// 返回: ObjectCapabilities 操作能力
+func (e *Editor) objectCapabilities(object GraphicObject, orderable map[*editorXML]bool) ObjectCapabilities {
+	id := editorObjectID(object)
 	all := ObjectCapabilities{Update: true, Paint: object.Type == "TextObject" || object.Type == "PathObject", ReplaceFont: object.Type == "TextObject", Reflow: object.Type == "TextObject" && object.TextObject.ReadDirection == 0 && object.TextObject.CharDirection == 0, LayoutKnown: object.Type == "TextObject" && (e.objectOrigin(id) == nil || object.TextObject.layout != nil), Transform: true, Arrange: true, Copy: true, Delete: true, Order: true}
 	all.ResetCrop = object.Type == "ImageObject" && object.state.crop != nil
 	origin := e.objectOrigin(id)
@@ -377,22 +384,26 @@ func (e *Editor) ObjectCapabilities(page int, id string) (ObjectCapabilities, er
 		all.ReplaceImage = object.Type == "ImageObject"
 		all.CropImage = all.ReplaceImage
 		all.FitImage = all.ReplaceImage && axisAlignedMatrix(NewMatrix(object.ImageObject.CTM))
-		return all, nil
+		return all
 	}
 	node := origin.node
 	if !editorXMLTransformable(node) {
-		return ObjectCapabilities{Reason: "object uses unsupported editing features", ReasonCode: EditUnsupportedObject}, nil
+		return ObjectCapabilities{Reason: "object uses unsupported editing features", ReasonCode: EditUnsupportedObject}
 	}
 	if origin.reason != nil && editReason(origin.reason) == EditUnsupportedStyle {
-		return ObjectCapabilities{Reason: origin.reason.Error(), ReasonCode: EditUnsupportedStyle}, nil
+		return ObjectCapabilities{Reason: origin.reason.Error(), ReasonCode: EditUnsupportedStyle}
 	}
 	if !editorXMLContainersSupported(node) {
-		return ObjectCapabilities{Reason: "object container uses unsupported editing features", ReasonCode: EditUnsupportedContainer}, nil
+		return ObjectCapabilities{Reason: "object container uses unsupported editing features", ReasonCode: EditUnsupportedContainer}
 	}
 	if err := validateEditorGeometry(object); err != nil {
-		return ObjectCapabilities{Reason: err.Error(), ReasonCode: EditInvalidObject}, nil
+		return ObjectCapabilities{Reason: err.Error(), ReasonCode: EditInvalidObject}
 	}
+	var checked bool
+	if all.Order, checked = orderable[node.parent]; !checked {
 		all.Order = editorContainerOrderable(node.parent)
+		orderable[node.parent] = all.Order
+	}
 	all.Ungroup = all.Order && e.compositeUngroupable(node) && (object.CompositeGraphicUnit.ResourceID != "" || len(object.CompositeGraphicUnit.Objects) != 0)
 	all.Copy = editorXMLCopyable(node) && (origin.reason == nil || object.Type == "PathObject" && editReason(origin.reason) == EditUnsupportedColor)
 	if origin.reason != nil {
@@ -422,7 +433,7 @@ func (e *Editor) ObjectCapabilities(page int, id string) (ObjectCapabilities, er
 		}
 	}
 	all.Stretch = all.Transform && e.objectStretchable(object, make(map[string]bool))
-	return all, nil
+	return all
 }
 
 // objectOrigin 获取原对象或其副本的保真来源

ofdgo_font_info.go

@@ -353,6 +353,13 @@ func (p *fontUsagePage) decodeObjects(d *xml.Decoder, start xml.StartElement, de
 		switch node.Name.Local {
 		case "PageBlock":
 			return p.decodeObjects(d, node, defaults)
+		case "TextObject":
+			var obj TextObject
+			if err := d.DecodeElement(&obj, &node); err != nil {
+				return err
+			}
+			p.renderer.countObjectFonts(GraphicObject{Type: "TextObject", TextObject: obj}, p.usage, defaults, nil)
+			return nil
 		case "PathObject":
 			var obj struct {
 				PathObject