feat: Exchange

packages/designer/src/document/selection.ts

@@ -157,7 +157,7 @@ export class Selection {
     return nodes;
   }
 
-  onSelectionChange(fn: () => void): () => void {
+  onSelectionChange(fn: (ids: string[]) => void): () => void {
     this.emitter.on('selectionchange', fn);
     return () => {
       this.emitter.removeListener('selectionchange', fn);

packages/vision-polyfill/src/exchange.ts

@@ -0,0 +1,51 @@
+import { Selection, DocumentModel, Node } from '@ali/lowcode-designer';
+import editor from './editor';
+
+let currentSelection: Selection;
+// let currentDocument: DocumentModel;
+
+// get selection async
+editor.once('designer.ready', () => {
+  const getSelection = () => {
+    if (editor.designer.currentSelection) {
+      currentSelection = editor.designer.currentSelection;
+      // currentDocument = editor.designer.currentDocument;
+
+      currentSelection.onSelectionChange((ids: string[]) => {
+        // console.log(ids);
+        // const nodes = ids.map((id: string) => currentDocument.getNode(id));
+        // console.log(nodes);
+      });
+    } else {
+      console.log('waiting ...');
+      requestAnimationFrame(getSelection);
+    }
+  };
+  getSelection();
+});
+
+export default {
+  select: (node: Node) => {
+    if (!node) {
+      return currentSelection.clear();
+    }
+    currentSelection.select(node.id);
+  },
+  getSelected: () => {
+    const nodes = currentSelection.getNodes();
+    return nodes;
+  },
+  // 以下废弃
+  // hover: (node: Node) => {
+  //   hovering.hover(node);
+  // },
+  // getDropping: () => {
+  //   return null;
+  // },
+  // onIntoView: (func: (node: any, insertion: Insertion) => any) => {
+  //   currentSelection.onSelectionChange((ids) => {
+  //     console.log(ids);
+  //   });
+  //   return null;
+  // },
+}

packages/vision-polyfill/src/vision.ts

@@ -8,6 +8,7 @@ import Bus from './bus';
 import Symbols from './symbols';
 import Skeleton from '@ali/lowcode-editor-skeleton';
 import editor from './editor';
+import Exchange from './exchange';
 
 function init(container?: Element) {
   if (!container) {
@@ -44,6 +45,7 @@ export {
   HOOKS,
   /* Symbol 管理类 */
   Symbols,
+  Exchange,
   /**
    * VE.init
    *