refactor(性能提升): 优化转换调度与联合编辑性能

internal/webview/webview.go

@@ -717,7 +717,7 @@ func (h *Host) readFonts() {
 }
 
 // loadFont 按转换请求读取单个系统字体
-// 入参: ctx 调用上下文, name 字体文件路径及字体索引
+// 入参: ctx 调用上下文, name 字体别名对应的文件名
 // 返回: []byte 字体数据, error 读取错误
 func (h *Host) loadFont(ctx context.Context, name string) ([]byte, error) {
 	if err := ctx.Err(); err != nil {

ofdgo_convert_pool.go

@@ -82,6 +82,12 @@ func (p *ConversionPool) memoryLimit() int64 {
 // 入参: ctx 取消上下文, image 是否为图像任务, size 图像工作量
 // 返回: error 取消错误
 func (p *ConversionPool) acquire(ctx context.Context, image bool, size int64) error {
+	var timer *time.Timer
+	defer func() {
+		if timer != nil {
+			timer.Stop()
+		}
+	}()
 	for {
 		if err := ctx.Err(); err != nil {
 			return err
@@ -104,16 +110,24 @@ func (p *ConversionPool) acquire(ctx context.Context, image bool, size int64) er
 		}
 		changed := p.changed
 		p.mu.Unlock()
-		timer := time.NewTimer(250 * time.Millisecond)
+		var tick <-chan time.Time
+		if p.options.AvailableMemory != nil {
+			if timer == nil {
+				timer = time.NewTimer(250 * time.Millisecond)
+			} else {
+				timer.Reset(250 * time.Millisecond)
+			}
+			tick = timer.C
+		}
 		select {
 		case <-ctx.Done():
-			timer.Stop()
-			return ctx.Err()
 		case <-changed:
-		case <-timer.C:
+		case <-tick:
 		}
+		if timer != nil {
 			timer.Stop()
 		}
+	}
 }
 
 // release 归还任务预算并唤醒等待者

ofdgo_editor_composite.go

@@ -119,6 +119,13 @@ func (e *Editor) CompositeObjectsAt(page int, path ObjectPath, indexes []int) ([
 		return nil, err
 	}
 	defer reader.Close()
+	return e.measureCompositeSelection(renderer, nodes, indexes)
+}
+
+// measureCompositeSelection 复用已解析范围，按输入索引度量成员并保留容器位置
+// 入参: renderer 资源渲染器, nodes 范围内全部成员, indexes 不重复的成员序号
+// 返回: []CompositeMember 独立成员快照, error 索引或度量错误
+func (e *Editor) measureCompositeSelection(renderer *Renderer, nodes []*editorCompositeNode, indexes []int) ([]CompositeMember, error) {
 	selected := make([]*editorCompositeNode, len(indexes))
 	seen := make(map[int]bool, len(indexes))
 	for i, index := range indexes {

ofdgo_editor_text_selection.go

@@ -118,15 +118,15 @@ func (e *Editor) analyzeTextSelection(page int, selection TextSelection) (TextSe
 		if len(selection.IDs) != 0 || len(selection.Indexes) == 0 {
 			return result, fmt.Errorf("composite selection requires indexes only")
 		}
-		members, err := e.CompositeObjectsAt(page, root, selection.Indexes)
-		if err != nil {
-			return result, err
-		}
-		reader, _, _, nodes, err := e.compositeScope(page, root)
+		reader, renderer, _, nodes, err := e.compositeScope(page, root)
 		if err != nil {
 			return result, err
 		}
 		defer reader.Close()
+		members, err := e.measureCompositeSelection(renderer, nodes, selection.Indexes)
+		if err != nil {
+			return result, err
+		}
 		for i, member := range members {
 			if member.Object.Type != "TextObject" || !member.Capabilities.RewriteText {
 				return result, fmt.Errorf("selection member is not editable text")
@@ -648,19 +648,21 @@ func (e *Editor) prepareTextSelectionEdit(edit *TextSelectionEdit) error {
 // 返回: TextSelection 提交后可用于重新枚举的选择
 func selectionAfterTextEdit(analysis TextSelectionAnalysis, parts []TextSelectionPart, reflow bool) TextSelection {
 	result := TextSelection{Root: analysis.Selection.Root}
-	deleted := make(map[int]bool)
+	var deleted []int
 	if reflow {
 		for _, part := range analysis.Parts[1:] {
-			deleted[part.Index] = true
+			deleted = append(deleted, part.Index)
 		}
 		parts = analysis.Parts[:1]
 	} else {
 		for _, part := range parts {
 			if part.Deleted {
-				deleted[part.Index] = true
+				deleted = append(deleted, part.Index)
 			}
 		}
 	}
+	slices.Sort(deleted)
+	deleted = slices.Compact(deleted)
 	for _, part := range parts {
 		if part.Deleted {
 			continue
@@ -669,13 +671,8 @@ func selectionAfterTextEdit(analysis TextSelectionAnalysis, parts []TextSelectio
 			result.IDs = append(result.IDs, part.ID)
 			continue
 		}
-		index := part.Index
-		for removed := range deleted {
-			if removed < part.Index {
-				index--
-			}
-		}
-		result.Indexes = append(result.Indexes, index)
+		removed, _ := slices.BinarySearch(deleted, part.Index)
+		result.Indexes = append(result.Indexes, part.Index-removed)
 	}
 	return result
 }
@@ -700,12 +697,17 @@ func (e *Editor) UpdateTextSelection(page int, selection TextSelection, edit Tex
 			return e.reflowTextSelection(page, selection, edit, preview)
 		}
 		if selection.Root != nil {
+			parts := make(map[int]int, len(preview.Parts))
+			for i, part := range preview.Parts {
+				parts[part.Index] = i
+			}
 			return e.editCompositeObjects(page, *selection.Root, selection.Indexes, func(_ *Renderer, nodes []*editorCompositeNode, _ []CompositeMember) error {
 				for i, node := range nodes {
-					for _, part := range preview.Parts {
-						if part.Index != selection.Indexes[i] {
+					index, exists := parts[selection.Indexes[i]]
+					if !exists {
 						continue
 					}
+					part := &preview.Parts[index]
 					if part.Deleted {
 						node.owner.patches = append(node.owner.patches, editorXMLPatch{node.span.start, node.span.end, nil})
 						continue
@@ -729,7 +731,6 @@ func (e *Editor) UpdateTextSelection(page int, selection TextSelection, edit Tex
 					}
 					node.setState(editorCompositeState{})
 				}
-				}
 				return nil
 			})
 		}