feat(加强兼容): 支持多文档

internal/webui/wasm.go

@@ -184,6 +184,7 @@ func (r *browserReaderAt) ReadAt(data []byte, offset int64) (int, error) {
 // RunWASM 注册浏览器WASM接口并阻塞运行
 func RunWASM() {
 	registerCallback("ofdgoOpen", openDocument)
+	registerCallback("ofdgoSelectDocument", selectDocument)
 	registerAsyncCallback("ofdgoConvertPDF", convertPDFDocument)
 	registerAsyncCallback("ofdgoConvertFile", convertFile)
 	registerAsyncCallback("ofdgoPackFiles", packFiles)
@@ -3359,6 +3360,27 @@ func changeAttachment(args []js.Value) (any, error) {
 	})
 }
 
+// selectDocument 切换包内文档，保留编辑快照并清除跨文档剪贴板
+// 入参: args 文档索引
+// 返回: any 文档信息, error 错误信息
+func selectDocument(args []js.Value) (any, error) {
+	if currentSession == nil || len(args) == 0 {
+		return nil, fmt.Errorf("ofd document is not opened")
+	}
+	session, err := currentSession.Document(args[0].Int())
+	if err != nil {
+		return nil, err
+	}
+	_ = currentSession.Close()
+	currentSession, currentEditor = session, session.editor
+	if pendingImport != nil {
+		_ = pendingImport.Close()
+		pendingImport = nil
+	}
+	copiedObjects, copiedStyle = nil, nil
+	return editorSummary(), nil
+}
+
 // editDocument 将已打开文档接入编辑器，沿用页面、资源及字体配置
 // 入参: args 当前页索引，省略时使用首页
 // 返回: any 编辑状态, error 错误信息
@@ -3367,6 +3389,7 @@ func editDocument(args []js.Value) (any, error) {
 		return nil, fmt.Errorf("ofd document is not opened")
 	}
 	if currentEditor != nil {
+		currentSession.editing = true
 		return editorSummary(), nil
 	}
 	editor, err := currentSession.Reader.Editor()
@@ -3952,7 +3975,7 @@ func verifySignatures(args []js.Value) (any, error) {
 			Certificates:                append(files["certificates"], files["roots"]...), Required: policy.RequireRevocation, VerifyTime: &now,
 		}))
 	}
-	reports, err := currentSession.Reader.VerifySignatures(options...)
+	reports, err := currentSession.Reader.VerifyDocumentSignatures(currentSession.Reader.DocumentIndex(), options...)
 	if err != nil {
 		return nil, err
 	}

internal/webui/webui.go

@@ -72,6 +72,8 @@ type pageBoxInfo struct {
 
 // DocumentInfo 文档信息
 type DocumentInfo struct {
+	DocumentIndex   int                `json:"documentIndex"`
+	Documents       []DocumentEntry    `json:"documents,omitempty"`
 	Encryption      EncryptionInfo     `json:"encryption"`
 	Version         string             `json:"version"`
 	DocType         string             `json:"docType"`
@@ -96,6 +98,12 @@ type DocumentInfo struct {
 	DetailsPending  bool               `json:"detailsPending,omitempty"`
 }
 
+// DocumentEntry 包内文档入口，不预先解析其他文档的页面和资源
+type DocumentEntry struct {
+	Index int    `json:"index"`
+	Title string `json:"title"`
+}
+
 // DocumentDetails 不含页面数组的文档补充信息
 type DocumentDetails struct {
 	FontCount       int              `json:"fontCount"`
@@ -287,6 +295,45 @@ func (s *Session) Close() error {
 	return nil
 }
 
+// Document 创建指定文档的会话，保留编辑内容和字体配置，不复用页面缓存
+// 不关闭原会话，输入文件的生命周期由原会话管理
+// 入参: index 文档索引，从0开始
+// 返回: *Session 文档会话, error 错误信息
+func (s *Session) Document(index int) (*Session, error) {
+	reader := s.Reader
+	if s.editor != nil {
+		var err error
+		reader, err = s.editor.Reader()
+		if err != nil {
+			return nil, err
+		}
+	}
+	reader, err := reader.Document(index)
+	if err != nil {
+		return nil, err
+	}
+	next, err := newSession(reader, OpenOptions{RenderAnnotations: s.Renderer.RenderAnnotations})
+	if err != nil {
+		return nil, err
+	}
+	ofdgo.WithRenderBackends(s.Renderer.Backends())(next.Renderer)
+	next.fontFS = s.fontFS
+	if next.fontFS != nil {
+		next.Renderer.SetFontFS(next.fontFS)
+	}
+	next.editor, err = reader.Editor()
+	if err != nil {
+		return nil, err
+	}
+	next.editor.SetHistoryLimit(100)
+	if next.fontFS != nil {
+		next.editor.SetFontFS(next.fontFS)
+	}
+	next.editor.SetRenderBackends(next.Renderer.Backends())
+	next.editing = true
+	return next, nil
+}
+
 // SetFonts 更新字体配置并保留文档、页面和验签结果
 // 入参: fonts 字体文件列表
 // 返回: error 错误信息
@@ -376,6 +423,7 @@ func (s *Session) SearchPage(index int, query string) ([]ofdgo.TextMatch, error)
 // 返回: DocumentInfo 文档信息
 func (s *Session) Summary() DocumentInfo {
 	info := DocumentInfo{
+		DocumentIndex:  s.Reader.DocumentIndex(),
 		Encryption:     s.encryptionInfo(),
 		Version:        s.Reader.Version(),
 		DocType:        s.Reader.DocType(),
@@ -384,6 +432,9 @@ func (s *Session) Summary() DocumentInfo {
 		Outlines:       s.doc.OutlineInfos(),
 		DetailsPending: true,
 	}
+	for index, body := range s.Reader.OFD.DocBody {
+		info.Documents = append(info.Documents, DocumentEntry{Index: index, Title: body.DocInfo.Title})
+	}
 	if docInfo, err := s.Reader.DocInfo(); err == nil && docInfo != nil {
 		info.Title = docInfo.Title
 		info.Author = docInfo.Author
@@ -788,7 +839,7 @@ func (s *Session) signatureInfos() ([]SignatureInfo, error) {
 		return s.signatures, s.signatureError
 	}
 	s.signaturesRead = true
-	reports, err := s.Reader.VerifySignatures()
+	reports, err := s.Reader.VerifyDocumentSignatures(s.Reader.DocumentIndex())
 	if err != nil {
 		s.signatureError = err
 		return nil, err