refactor(editor): move mindmap transform to its package (#11115)

blocksuite/affine/gfx/connector/src/element-transform/connector-filter.ts

@@ -0,0 +1,39 @@
+import { ConnectorElementModel } from '@blocksuite/affine-model';
+import {
+  type DragExtensionInitializeContext,
+  TransformExtension,
+} from '@blocksuite/block-std/gfx';
+
+export class ConnectorFilter extends TransformExtension {
+  static override key = 'connector-filter';
+  override onDragInitialize(context: DragExtensionInitializeContext) {
+    let hasConnectorFlag = false;
+
+    const elementSet = new Set(context.elements.map(elem => elem.id));
+    const elements = context.elements.filter(elem => {
+      if (elem instanceof ConnectorElementModel) {
+        const sourceElemNotFound =
+          elem.source.id && !elementSet.has(elem.source.id);
+        const targetElemNotFound =
+          elem.target.id && !elementSet.has(elem.target.id);
+
+        // If either source or target element is not found, then remove the connector
+        if (sourceElemNotFound || targetElemNotFound) {
+          return false;
+        }
+
+        hasConnectorFlag = true;
+        return true;
+      }
+
+      return true;
+    });
+
+    if (hasConnectorFlag) {
+      // connector needs to be updated first
+      elements.sort((a, _) => (a instanceof ConnectorElementModel ? -1 : 1));
+    }
+
+    return {};
+  }
+}

blocksuite/affine/gfx/connector/src/element-transform/index.ts

@@ -0,0 +1 @@
+export * from './connector-filter';

blocksuite/affine/gfx/connector/src/index.ts

@@ -1,4 +1,5 @@
 export * from './connector-tool';
+export * from './element-transform';
 export * from './text';
 export * from './toolbar/config';
 export * from './toolbar/quick-tool';