feat(编辑能力): 统一文字编辑，完善排版保存

ofdgo_editor_xml.go

@@ -397,6 +397,9 @@ func editorXMLAttributes(node *editorXML, allowed string) bool {
 		if attr.Name.Space == "xmlns" || attr.Name.Local == "xmlns" && attr.Name.Space == "" {
 			continue
 		}
+		if textLayoutAttribute(node.name, attr) {
+			continue
+		}
 		if attr.Name.Space != "" || !slices.Contains(strings.Fields(allowed), attr.Name.Local) {
 			return false
 		}
@@ -569,6 +572,15 @@ func editorXMLMergeNamespace(data []byte, node *editorXML, oldXML, newXML []byte
 		return nil, err
 	}
 	changes := make(map[string]string)
+	layoutValue := func(n *editorXML) string {
+		for _, attr := range n.attrs {
+			if attr.Name.Space == textLayoutNamespace && attr.Name.Local == "Layout" {
+				return attr.Value
+			}
+		}
+		return ""
+	}
+	layoutChanged := layoutValue(oldNode) != layoutValue(newNode)
 	if legacyClip {
 		changes["TransFlag"] = ""
 	}
@@ -578,7 +590,7 @@ func editorXMLMergeNamespace(data []byte, node *editorXML, oldXML, newXML []byte
 		}
 	}
 	contentChanged := !bytes.Equal(oldXML[oldNode.open:oldNode.close], newXML[newNode.open:newNode.close])
-	if len(changes) == 0 && !contentChanged && namespace == node.name.Space {
+	if len(changes) == 0 && !layoutChanged && !contentChanged && namespace == node.name.Space {
 		return bytes.Clone(data[node.start:node.end]), nil
 	}
 	d := xml.NewDecoder(bytes.NewReader(data[node.start:node.open]))
@@ -587,8 +599,29 @@ func editorXMLMergeNamespace(data []byte, node *editorXML, oldXML, newXML []byte
 		return nil, err
 	}
 	start := token.(xml.StartElement)
+	if layoutChanged {
+		value, found := layoutValue(newNode), false
+		attrs := start.Attr[:0]
+		for i, attr := range start.Attr {
+			resolved := node.attrs[i]
+			if resolved.Name.Space == textLayoutNamespace && resolved.Name.Local == "Layout" {
+				found = true
+				if value != "" {
+					attr.Value = value
+					attrs = append(attrs, attr)
+				}
+				continue
+			}
+			attrs = append(attrs, attr)
+		}
+		start.Attr = attrs
+		if !found && value != "" {
+			prefix := editorXMLNamespacePrefix(node, "ofdgo")
+			start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Space: "xmlns", Local: prefix}, Value: textLayoutNamespace}, xml.Attr{Name: xml.Name{Space: prefix, Local: "Layout"}, Value: value})
+		}
+	}
 	if legacyClip || namespace != node.name.Space {
-		start.Name.Space = editorXMLNamespacePrefix(node)
+		start.Name.Space = editorXMLNamespacePrefix(node, "ofd")
 		start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Space: "xmlns", Local: start.Name.Space}, Value: namespace})
 	}
 	var result bytes.Buffer