feat(压缩性能): 优化多文档压缩内存与性能

ofdgo_editor_resource_scope.go

@@ -20,7 +20,7 @@ import (
 	"slices"
 )
 
-// resourceReferenceScopes 按文档归集资源标识和字体用字，共享资源索引合并所属文档的引用
+// resourceReferenceScopes 按文档归集资源标识和字体用字，同文档索引共用只读结果，跨文档索引独立合并
 // 入参: ctx 取消上下文, parts 输出改动, generated 自产页面引用, documents 文档入口, resources 资源索引, references 文件引用, selected 限定的文档入口，空值统计全部文档
 // 返回: map[string]*editorResourceRefs 各资源索引的引用，存在无法归属的引用时为空, error 读取或取消错误
 func (r *Reader) resourceReferenceScopes(ctx context.Context, parts map[string][]byte, generated map[string]editorGeneratedReferences, documents map[string]bool, resources []string, references map[string]*editorResourceRefs, selected string) (map[string]*editorResourceRefs, error) {
@@ -30,6 +30,7 @@ func (r *Reader) resourceReferenceScopes(ctx context.Context, parts map[string][
 	}
 	used := make(map[string]bool)
 	result := make(map[string]*editorResourceRefs)
+	shared := make(map[string]bool)
 	for _, entry := range slices.Sorted(maps.Keys(documents)) {
 		scope, err := r.versionFileDependencies(ctx, entry, parts, generated)
 		if err != nil {
@@ -37,6 +38,9 @@ func (r *Reader) resourceReferenceScopes(ctx context.Context, parts map[string][
 		}
 		refs := &editorResourceRefs{ids: make(map[string]bool), fonts: make(map[string]*editorFontUsage)}
 		for name := range scope {
+			if err := ctx.Err(); err != nil {
+				return nil, err
+			}
 			if source := references[name]; source != nil {
 				used[name] = true
 				if selected == "" || selected == entry {
@@ -48,11 +52,21 @@ func (r *Reader) resourceReferenceScopes(ctx context.Context, parts map[string][
 			continue
 		}
 		for name := range scope {
+			if err := ctx.Err(); err != nil {
+				return nil, err
+			}
 			if !indexes[name] {
 				continue
 			}
 			if result[name] == nil {
-				result[name] = &editorResourceRefs{ids: make(map[string]bool), fonts: make(map[string]*editorFontUsage)}
+				result[name] = refs
+				continue
+			}
+			if !shared[name] {
+				merged := &editorResourceRefs{ids: make(map[string]bool), fonts: make(map[string]*editorFontUsage)}
+				merged.merge(result[name])
+				result[name] = merged
+				shared[name] = true
 			}
 			result[name].merge(refs)
 		}