refactoring of cmaps, widgets, etc.

static/cmap/model/concept-map.js

@@ -232,8 +232,25 @@ export class CmapModel {
     return new CmapModel(repository, conceptMap);
   }
 
+  /** Return a detached copy of the map metadata. */
+  metadata() {
+    return copy(this.conceptMap.metadata);
+  }
+
+  /** Return a detached derived-view reference, or null for an independent map. */
+  derivedView() {
+    return copy(this.conceptMap.derivedView);
+  }
+
+  /** Return a new model with changed map metadata and unchanged contents. */
+  withMetadata(metadata) {
+    const document = this.toDocument();
+    document.metadata = copy(metadata);
+    return CmapModel.fromDocument(document);
+  }
+
   /**
-   * Split an embedded submap into a standalone map and its remaining parent.
+   * Split an embedded submap into standalone child and remaining parent models.
    * The owner stays in the parent as an ordinary concept and links to targetSlug.
    * Descendant placements become the complete contents of the child map.
    */
@@ -401,7 +418,10 @@ export class CmapModel {
     if (parentOwnerships.length) parentDocument.conceptOwnerships = parentOwnerships;
     else delete parentDocument.conceptOwnerships;
 
-    return { parentDocument, childDocument };
+    return {
+      parentModel: CmapModel.fromDocument(parentDocument),
+      childModel: CmapModel.fromDocument(childDocument)
+    };
   }
 
   toDocument() {