feat(core): allow bs snapshot dragging targets (#9093)

fix AF-1924, AF-1848, AF-1928, AF-1931

dnd between affine & editor

<div class='graphite__hidden'>
          <div>🎥 Video uploaded on Graphite:</div>
            <a href="https://app.graphite.dev/media/video/T2klNLEk0wxLh4NRDzhk/dff3ceb1-dc82-4222-9b55-13be80b28b2f.mp4">
              <img src="https://app.graphite.dev/api/v1/graphite/video/thumbnail/T2klNLEk0wxLh4NRDzhk/dff3ceb1-dc82-4222-9b55-13be80b28b2f.mp4">
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<video src="https://graphite-user-uploaded-assets-prod.s3.amazonaws.com/T2klNLEk0wxLh4NRDzhk/dff3ceb1-dc82-4222-9b55-13be80b28b2f.mp4">20241210-1217-49.8960381.mp4</video>

packages/frontend/apps/electron/src/main/windows-manager/tab-views.ts

@@ -171,6 +171,7 @@ export class WebContentViewsManager {
           ready: ready.has(w.id),
           activeViewIndex: w.activeViewIndex,
           views: w.views,
+          basename: w.basename,
         };
       });
     }),
@@ -952,6 +953,7 @@ export const onTabsStatusChange = (
       pinned: boolean;
       activeViewIndex: number;
       views: WorkbenchViewMeta[];
+      basename: string;
     }[]
   ) => void
 ) => {

packages/frontend/component/src/ui/dnd/context.ts

@@ -1,13 +1,23 @@
 import { createContext } from 'react';
 
-import type { DNDData, ExternalDataAdapter } from './types';
+import type { DNDData, fromExternalData, toExternalData } from './types';
 
 export const DNDContext = createContext<{
   /**
    * external data adapter.
+   * Convert the external data to the draggable data that are known to affine.
+   *
    * if this is provided, the drop target will handle external elements as well.
    *
    * @default undefined
    */
-  externalDataAdapter?: ExternalDataAdapter<DNDData>;
+  fromExternalData?: fromExternalData<DNDData>;
+
+  /**
+   * Convert the draggable data to the external data.
+   * Mainly used to be consumed by blocksuite.
+   *
+   * @default undefined
+   */
+  toExternalData?: toExternalData<DNDData>;
 }>({});

packages/frontend/component/src/ui/dnd/dnd.stories.tsx

@@ -92,7 +92,7 @@ export const DropTarget: StoryFn<{ canDrop: boolean }> = ({ canDrop }) => {
       onDrop(data) {
         setDropData(prev => prev + data.source.data.text);
       },
-      externalDataAdapter(args) {
+      fromExternalData(args) {
         return {
           text: args.source.getStringData(args.source.types[0]) || 'no value',
         };

packages/frontend/component/src/ui/dnd/draggable.ts

@@ -5,42 +5,21 @@ import { pointerOutsideOfPreview } from '@atlaskit/pragmatic-drag-and-drop/eleme
 import { preserveOffsetOnSource } from '@atlaskit/pragmatic-drag-and-drop/element/preserve-offset-on-source';
 import { setCustomNativeDragPreview } from '@atlaskit/pragmatic-drag-and-drop/element/set-custom-native-drag-preview';
 import type { DropTargetRecord } from '@atlaskit/pragmatic-drag-and-drop/types';
-import { useEffect, useMemo, useRef, useState } from 'react';
+import { useContext, useEffect, useMemo, useRef, useState } from 'react';
 import ReactDOM, { flushSync } from 'react-dom';
 
-import type { DNDData } from './types';
+import { DNDContext } from './context';
-
+import {
-type DraggableGetFeedback = Parameters<
+  type DNDData,
-  NonNullable<Parameters<typeof draggable>[0]['getInitialData']>
+  type DraggableGet,
->[0];
+  draggableGet,
-
+  type DraggableGetFeedback,
-type DraggableGet<T> = T | ((data: DraggableGetFeedback) => T);
+  type toExternalData,
-
+} from './types';
-function draggableGet<T>(
-  get: T
-): T extends undefined
-  ? undefined
-  : T extends DraggableGet<infer I>
-    ? (args: DraggableGetFeedback) => I
-    : never {
-  if (get === undefined) {
-    return undefined as any;
-  }
-  return ((args: DraggableGetFeedback) =>
-    typeof get === 'function' ? (get as any)(args) : get) as any;
-}
 
 export interface DraggableOptions<D extends DNDData = DNDData> {
   data?: DraggableGet<D['draggable']>;
-  dataForExternal?: DraggableGet<{
+  toExternalData?: toExternalData<D>;
-    [Key in
-      | 'text/uri-list'
-      | 'text/plain'
-      | 'text/html'
-      | 'Files'
-      // eslint-disable-next-line @typescript-eslint/ban-types
-      | (string & {})]?: string;
-  }>;
   canDrag?: DraggableGet<boolean>;
   disableDragPreview?: boolean;
   dragPreviewPosition?: DraggableDragPreviewPosition;
@@ -82,8 +61,23 @@ export const useDraggable = <D extends DNDData = DNDData>(
   const enableDropTarget = useRef(false);
   const enableDragging = useRef(false);
 
+  const context = useContext(DNDContext);
+
   // eslint-disable-next-line react-hooks/exhaustive-deps
-  const options = useMemo(getOptions, deps);
+  const options = useMemo(() => {
+    const opts = getOptions();
+
+    const toExternalData = opts.toExternalData ?? context.toExternalData;
+    return {
+      ...opts,
+      toExternalData: toExternalData
+        ? (args: DraggableGetFeedback) => {
+            return (opts.toExternalData ?? toExternalData)(args, opts.data);
+          }
+        : undefined,
+    };
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [...deps, context.toExternalData]);
 
   useEffect(() => {
     if (!dragRef.current) {
@@ -110,7 +104,7 @@ export const useDraggable = <D extends DNDData = DNDData>(
       dragHandle: dragHandleRef.current ?? undefined,
       canDrag: draggableGet(options.canDrag),
       getInitialData: draggableGet(options.data),
-      getInitialDataForExternal: draggableGet(options.dataForExternal),
+      getInitialDataForExternal: draggableGet(options.toExternalData),
       onDragStart: args => {
         if (enableDragging.current) {
           setDragging(true);

packages/frontend/component/src/ui/dnd/drop-target.ts

@@ -20,7 +20,7 @@ import {
 import { useContext, useEffect, useMemo, useRef, useState } from 'react';
 
 import { DNDContext } from './context';
-import type { DNDData, ExternalDataAdapter } from './types';
+import type { DNDData, fromExternalData } from './types';
 
 export type DropTargetDropEvent<D extends DNDData> = {
   treeInstruction: Instruction | null;
@@ -74,8 +74,8 @@ const getAdaptedEventArgs = <
   isDropEvent = false
 ): Args => {
   const data =
-    isExternalDrag(args) && options.externalDataAdapter
+    isExternalDrag(args) && options.fromExternalData
-      ? options.externalDataAdapter(
+      ? options.fromExternalData(
           // @ts-expect-error hack for external data adapter (source has no data field)
           args as ExternalGetDataFeedbackArgs,
           isDropEvent
@@ -172,10 +172,10 @@ export interface DropTargetOptions<D extends DNDData = DNDData> {
    * external data adapter.
    * Will use the external data adapter from the context if not provided.
    */
-  externalDataAdapter?: ExternalDataAdapter<D>;
+  fromExternalData?: fromExternalData<D>;
   /**
    * Make the drop target allow external data.
-   * If this is undefined, it will be set to true if externalDataAdapter is provided.
+   * If this is undefined, it will be set to true if fromExternalData is provided.
    *
    * @default undefined
    */
@@ -217,17 +217,17 @@ export const useDropTarget = <D extends DNDData = DNDData>(
 
   const options = useMemo(() => {
     const opts = getOptions();
-    const allowExternal = opts.allowExternal ?? !!opts.externalDataAdapter;
+    const allowExternal = opts.allowExternal ?? !!opts.fromExternalData;
     return {
       ...opts,
       allowExternal,
-      externalDataAdapter: allowExternal
+      fromExternalData: allowExternal
-        ? (opts.externalDataAdapter ??
+        ? (opts.fromExternalData ??
-          (dropTargetContext.externalDataAdapter as ExternalDataAdapter<D>))
+          (dropTargetContext.fromExternalData as fromExternalData<D>))
         : undefined,
     };
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [...deps, dropTargetContext.externalDataAdapter]);
+  }, [...deps, dropTargetContext.fromExternalData]);
 
   const dropTargetOptions = useMemo(() => {
     const wrappedCanDrop = dropTargetGet(options.canDrop, options);
@@ -240,7 +240,7 @@ export const useDropTarget = <D extends DNDData = DNDData>(
             // check if args has data. if not, it's an external drag
             // we always allow external drag since the data is only
             // available in drop event
-            if (isExternalDrag(args) && options.externalDataAdapter) {
+            if (isExternalDrag(args) && options.fromExternalData) {
               return true;
             }
             return wrappedCanDrop(args);
@@ -249,20 +249,6 @@ export const useDropTarget = <D extends DNDData = DNDData>(
       getDropEffect: dropTargetGet(options.dropEffect, options),
       getIsSticky: dropTargetGet(options.isSticky, options),
       onDrop: (_args: DropTargetDropEvent<D>) => {
-        // external data is only available in drop event thus
-        // this is the only case for getAdaptedEventArgs
-        const args = getAdaptedEventArgs(options, _args, true);
-        if (
-          isExternalDrag(_args) &&
-          options.externalDataAdapter &&
-          typeof options.canDrop === 'function' &&
-          // there is a small flaw that canDrop called in onDrop misses
-          // `input and `element` arguments
-          !options.canDrop(args as any)
-        ) {
-          return;
-        }
-
         if (enableDraggedOver.current) {
           setDraggedOver(false);
         }
@@ -292,6 +278,21 @@ export const useDropTarget = <D extends DNDData = DNDData>(
         if (dropTargetRef.current) {
           delete dropTargetRef.current.dataset['draggedOver'];
         }
+
+        // external data is only available in drop event thus
+        // this is the only case for getAdaptedEventArgs
+        const args = getAdaptedEventArgs(options, _args, true);
+        if (
+          isExternalDrag(_args) &&
+          options.fromExternalData &&
+          typeof options.canDrop === 'function' &&
+          // there is a small flaw that canDrop called in onDrop misses
+          // `input and `element` arguments
+          !options.canDrop(args as any)
+        ) {
+          return;
+        }
+
         if (
           args.location.current.dropTargets[0]?.element ===
           dropTargetRef.current
@@ -451,11 +452,11 @@ export const useDropTarget = <D extends DNDData = DNDData>(
   }, [dropTargetOptions]);
 
   useEffect(() => {
-    if (!dropTargetRef.current || !options.externalDataAdapter) {
+    if (!dropTargetRef.current || !options.fromExternalData) {
       return;
     }
     return dropTargetForExternal(dropTargetOptions as any);
-  }, [dropTargetOptions, options.externalDataAdapter]);
+  }, [dropTargetOptions, options.fromExternalData]);
 
   return {
     dropTargetRef,

packages/frontend/component/src/ui/dnd/types.ts

@@ -1,3 +1,4 @@
+import type { draggable } from '@atlaskit/pragmatic-drag-and-drop/element/adapter';
 import type { dropTargetForExternal } from '@atlaskit/pragmatic-drag-and-drop/external/adapter';
 
 export interface DNDData<
@@ -12,7 +13,44 @@ export type ExternalGetDataFeedbackArgs = Parameters<
   NonNullable<Parameters<typeof dropTargetForExternal>[0]['getData']>
 >[0];
 
-export type ExternalDataAdapter<D extends DNDData> = (
+export type fromExternalData<D extends DNDData> = (
   args: ExternalGetDataFeedbackArgs,
   isDropEvent?: boolean
 ) => D['draggable'];
+
+export type DraggableGetFeedback = Parameters<
+  NonNullable<Parameters<typeof draggable>[0]['getInitialData']>
+>[0];
+
+type DraggableGetFeedbackArgs = Parameters<
+  NonNullable<Parameters<typeof draggable>[0]['getInitialData']>
+>[0];
+
+export function draggableGet<T>(
+  get: T
+): T extends undefined
+  ? undefined
+  : T extends DraggableGet<infer I>
+    ? (args: DraggableGetFeedback) => I
+    : never {
+  if (get === undefined) {
+    return undefined as any;
+  }
+  return ((args: DraggableGetFeedback) =>
+    typeof get === 'function' ? (get as any)(args) : get) as any;
+}
+
+export type DraggableGet<T> = T | ((data: DraggableGetFeedback) => T);
+
+export type toExternalData<D extends DNDData> = (
+  args: DraggableGetFeedbackArgs,
+  data?: DraggableGet<D['draggable']>
+) => {
+  [Key in
+    | 'text/uri-list'
+    | 'text/plain'
+    | 'text/html'
+    | 'Files'
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    | (string & {})]?: string;
+};

packages/frontend/core/src/desktop/pages/workspace/detail-page/detail-page-header.css.ts

@@ -45,3 +45,8 @@ export const dragHandle = style({
     },
   },
 });
+
+export const dragPreview = style({
+  // see https://atlassian.design/components/pragmatic-drag-and-drop/web-platform-design-constraints/#native-drag-previews
+  maxWidth: '280px',
+});

packages/frontend/core/src/desktop/pages/workspace/detail-page/detail-page-header.tsx

@@ -174,7 +174,7 @@ export function DetailPageHeader(
     docId: page.id,
   });
 
-  const { dragRef, dragHandleRef, dragging } =
+  const { dragRef, dragging, CustomDragPreview } =
     useDraggable<AffineDNDData>(() => {
       return {
         data: {
@@ -187,7 +187,7 @@ export function DetailPageHeader(
             id: page.id,
           },
         },
-        disableDragPreview: true,
+        dragPreviewPosition: 'pointer-outside',
       };
     }, [page.id]);
 
@@ -203,13 +203,14 @@ export function DetailPageHeader(
   }, [dragging, onDragging]);
 
   return (
-    <div className={styles.root} ref={dragRef} data-dragging={dragging}>
+    <>
-      <DragHandle
+      <div className={styles.root} ref={dragRef} data-dragging={dragging}>
-        ref={dragHandleRef}
+        <DragHandle dragging={dragging} className={styles.dragHandle} />
-        dragging={dragging}
+        {inner}
-        className={styles.dragHandle}
+      </div>
-      />
+      <CustomDragPreview>
-      {inner}
+        <div className={styles.dragPreview}>{inner}</div>
-    </div>
+      </CustomDragPreview>
+    </>
   );
 }

packages/frontend/core/src/desktop/pages/workspace/index.tsx

@@ -135,9 +135,10 @@ const DNDContextProvider = ({ children }: PropsWithChildren) => {
   const dndService = useService(DndService);
   const contextValue = useMemo(() => {
     return {
-      externalDataAdapter: dndService.externalDataAdapter,
+      fromExternalData: dndService.fromExternalData,
+      toExternalData: dndService.toExternalData,
     };
-  }, [dndService.externalDataAdapter]);
+  }, [dndService.fromExternalData, dndService.toExternalData]);
   return (
     <DNDContext.Provider value={contextValue}>{children}</DNDContext.Provider>
   );

packages/frontend/core/src/modules/app-tabs-header/views/app-tabs-header.tsx

@@ -31,6 +31,7 @@ import {
 
 import { AppSidebarService } from '../../app-sidebar';
 import { DesktopApiService } from '../../desktop-api';
+import { resolveLinkToDoc } from '../../navigation';
 import { iconNameToIcon } from '../../workbench/constants';
 import { DesktopStateSynchronizer } from '../../workbench/services/desktop-state-synchronizer';
 import {
@@ -176,23 +177,50 @@ const WorkbenchTab = ({
       dropEffect: 'move',
       canDrop: tabCanDrop(workbench),
       isSticky: true,
+      allowExternal: true,
     }),
     [onDrop, workbench]
   );
 
-  const { dragRef } = useDraggable<AffineDNDData>(
+  const { dragRef } = useDraggable<AffineDNDData>(() => {
-    () => ({
+    const urls = workbench.views.map(view => {
+      const url = new URL(
+        workbench.basename + (view.path?.pathname ?? ''),
+        location.origin
+      );
+      url.search = view.path?.search ?? '';
+      return url.toString();
+    });
+
+    let entity: AffineDNDData['draggable']['entity'];
+
+    for (const url of urls) {
+      const maybeDocLink = resolveLinkToDoc(url);
+      if (maybeDocLink && maybeDocLink.docId) {
+        entity = {
+          type: 'doc',
+          id: maybeDocLink.docId,
+        };
+      }
+    }
+
+    return {
       canDrag: dnd,
       data: {
         from: {
           at: 'app-header:tabs',
           tabId: workbench.id,
         },
+        entity,
       },
       dragPreviewPosition: 'pointer-outside',
-    }),
+      toExternalData: () => {
-    [dnd, workbench.id]
+        return {
-  );
+          'text/uri-list': urls.join('\n'),
+        };
+      },
+    };
+  }, [dnd, workbench.basename, workbench.id, workbench.views]);
 
   return (
     <div

packages/frontend/core/src/modules/dnd/services/index.ts

@@ -1,16 +1,26 @@
-import type {
+import {
-  ExternalDataAdapter,
+  type ExternalGetDataFeedbackArgs,
-  ExternalGetDataFeedbackArgs,
+  type fromExternalData,
+  type toExternalData,
 } from '@affine/component';
+import { createPageModeSpecs } from '@affine/core/components/blocksuite/block-suite-editor/specs/page';
 import type { AffineDNDData } from '@affine/core/types/dnd';
+import { BlockStdScope } from '@blocksuite/affine/block-std';
+import { DndApiExtensionIdentifier } from '@blocksuite/affine/blocks';
+import {
+  DocCollection,
+  nanoid,
+  type SliceSnapshot,
+} from '@blocksuite/affine/store';
 import type { DocsService, WorkspaceService } from '@toeverything/infra';
-import { Service } from '@toeverything/infra';
+import { getAFFiNEWorkspaceSchema, Service } from '@toeverything/infra';
 
 import { resolveLinkToDoc } from '../../navigation';
 
-type EntityResolver = (
+type Entity = AffineDNDData['draggable']['entity'];
-  data: string
+type EntityResolver = (data: string) => Entity | null;
-) => AffineDNDData['draggable']['entity'] | null;
+
+type ExternalDragPayload = ExternalGetDataFeedbackArgs['source'];
 
 export class DndService extends Service {
   constructor(
@@ -20,13 +30,47 @@ export class DndService extends Service {
     super();
 
     // order matters
-    this.resolvers.set('text/html', this.resolveHTML);
+    this.resolvers.push(this.resolveBlocksuiteExternalData);
-    this.resolvers.set('text/uri-list', this.resolveUriList);
+
+    const mimeResolvers: [string, EntityResolver][] = [
+      ['text/html', this.resolveHTML],
+      ['text/uri-list', this.resolveUriList],
+    ];
+
+    mimeResolvers.forEach(([type, resolver]) => {
+      this.resolvers.push((source: ExternalDragPayload) => {
+        if (source.types.includes(type)) {
+          const stringData = source.getStringData(type);
+          if (stringData) {
+            return resolver(stringData);
+          }
+        }
+        return null;
+      });
+    });
   }
 
-  private readonly resolvers = new Map<string, EntityResolver>();
+  private readonly resolvers: ((
+    source: ExternalDragPayload
+  ) => Entity | null)[] = [];
 
-  externalDataAdapter: ExternalDataAdapter<AffineDNDData> = (
+  readonly blocksuiteDndAPI = (() => {
+    const collection = new DocCollection({
+      schema: getAFFiNEWorkspaceSchema(),
+    });
+    collection.meta.initialize();
+    const doc = collection.createDoc();
+    const std = new BlockStdScope({
+      doc,
+      extensions: createPageModeSpecs(this.framework),
+    });
+    this.disposables.push(() => {
+      collection.dispose();
+    });
+    return std.get(DndApiExtensionIdentifier);
+  })();
+
+  fromExternalData: fromExternalData<AffineDNDData> = (
     args: ExternalGetDataFeedbackArgs,
     isDropEvent?: boolean
   ) => {
@@ -36,19 +80,15 @@ export class DndService extends Service {
     const from: AffineDNDData['draggable']['from'] = {
       at: 'external',
     };
-    let entity: AffineDNDData['draggable']['entity'];
+
+    let entity: Entity | null = null;
 
     // in the order of the resolvers instead of the order of the types
-    for (const [type, resolver] of this.resolvers) {
+    for (const resolver of this.resolvers) {
-      if (args.source.types.includes(type)) {
+      const candidate = resolver(args.source);
-        const stringData = args.source.getStringData(type);
+      if (candidate) {
-        if (stringData) {
+        entity = candidate;
-          const candidate = resolver(stringData);
+        break;
-          if (candidate) {
-            entity = candidate;
-            break;
-          }
-        }
       }
     }
 
@@ -62,6 +102,47 @@ export class DndService extends Service {
     };
   };
 
+  toExternalData: toExternalData<AffineDNDData> = (args, data) => {
+    const normalData = typeof data === 'function' ? data(args) : data;
+
+    if (
+      !normalData ||
+      !normalData.entity ||
+      normalData.entity.type !== 'doc' ||
+      !normalData.entity.id
+    ) {
+      return {};
+    }
+
+    // todo: use blocksuite provided api to generate snapshot
+    const snapshotSlice: SliceSnapshot = {
+      content: [
+        {
+          children: [],
+          flavour: 'affine:embed-linked-doc',
+          type: 'block',
+          id: nanoid(),
+          props: {
+            pageId: normalData.entity.id,
+          },
+        },
+      ],
+      type: 'slice',
+      pageId: nanoid(),
+      pageVersion: 1,
+      workspaceId: this.workspaceService.workspace.id,
+      workspaceVersion: 2,
+    };
+
+    const serialized = JSON.stringify(snapshotSlice);
+
+    const html = `<div data-blocksuite-snapshot="${encodeURIComponent(serialized)}"></div>`;
+
+    return {
+      'text/html': html,
+    };
+  };
+
   private readonly resolveUriList: EntityResolver = urls => {
     // only deal with the first url
     const url = urls
@@ -87,16 +168,55 @@ export class DndService extends Service {
     return null;
   };
 
-  // todo: implement this
+  private readonly resolveBlocksuiteExternalData = (
-  private readonly resolveHTML: EntityResolver = _html => {
+    source: ExternalDragPayload
+  ): Entity | null => {
+    const fakeDataTransfer = new Proxy(new DataTransfer(), {
+      get(target, prop) {
+        if (prop === 'getData') {
+          return (type: string) => source.getStringData(type);
+        }
+        return target[prop as keyof DataTransfer];
+      },
+    });
+    const snapshot = this.blocksuiteDndAPI.decodeSnapshot(fakeDataTransfer);
+    if (!snapshot) {
+      return null;
+    }
+    return this.resolveBlockSnapshot(snapshot);
+  };
+
+  private readonly resolveHTML: EntityResolver = html => {
     try {
-      // const parser = new DOMParser();
+      const doc = new DOMParser().parseFromString(html, 'text/html');
-      // const doc = parser.parseFromString(html, 'text/html');
+      // If drag from another secure context, the url-list
-      // return doc.body.innerText;
+      // will be "about:blank#blocked"
+      // We can still infer the url-list from the anchor tags
+      const urls = Array.from(doc.querySelectorAll('a'))
+        .map(a => a.href)
+        .join('\n');
+      return this.resolveUriList(urls);
     } catch {
       // ignore the error
       return null;
     }
+  };
+
+  private readonly resolveBlockSnapshot = (
+    snapshot: SliceSnapshot
+  ): Entity | null => {
+    for (const block of snapshot.content) {
+      if (
+        ['affine:embed-linked-doc', 'affine:embed-synced-doc'].includes(
+          block.flavour
+        )
+      ) {
+        return {
+          type: 'doc',
+          id: block.props.pageId as string,
+        };
+      }
+    }
     return null;
   };
 }

tests/affine-local/e2e/drag-page.spec.ts

@@ -243,3 +243,83 @@ test('drag a page link in editor to favourites', async ({ page }) => {
     pageId
   );
 });
+
+async function enableNewDND(page: Page) {
+  await page.evaluate(() => {
+    // @ts-expect-error
+    window.currentEditor.doc.awarenessStore.setFlag('enable_new_dnd', true);
+  });
+}
+
+test('drag a page card block to another page', async ({ page }) => {
+  await enableNewDND(page);
+  await clickNewPageButton(page);
+  await page.waitForTimeout(500);
+  await page.keyboard.press('Enter');
+  await createLinkedPage(page, 'hi from another page');
+
+  const pageReference = page.locator('a').filter({
+    has: page.locator(
+      '.affine-reference-title:has-text("hi from another page")'
+    ),
+  });
+
+  const pageLink = await pageReference.evaluate(
+    el => (el as HTMLAnchorElement).href
+  );
+
+  expect(pageLink).toBeTruthy();
+
+  if (!pageLink) {
+    return;
+  }
+
+  const pageId = getDocIdFromUrl(pageLink);
+
+  await pageReference.hover();
+
+  const inlineToolbar = page.locator('reference-popup');
+
+  // convert page reference to card block
+  await inlineToolbar.getByRole('button', { name: 'Switch view' }).click();
+  await inlineToolbar.getByRole('button', { name: 'Card view' }).click();
+
+  // hover the card block to show the drag handle
+  const box = await page.locator('affine-embed-linked-doc-block').boundingBox();
+
+  expect(box).toBeTruthy();
+
+  if (!box) {
+    return;
+  }
+
+  await page.mouse.move(box.x - 5, box.y + box.height / 2);
+
+  await dragToFavourites(
+    page,
+    page.locator('.affine-drag-handle-container'),
+    pageId
+  );
+});
+
+test('drag a favourite page into blocksuite', async ({ page }) => {
+  await enableNewDND(page);
+  await clickNewPageButton(page, 'hi from page');
+  await page.getByTestId('pin-button').click();
+  const pageId = getCurrentDocIdFromUrl(page);
+  const item = page
+    .getByTestId(`explorer-favorites`)
+    .locator(`[data-testid="explorer-doc-${pageId}"]`);
+  await expect(item).toBeVisible();
+
+  // drag item into blocksuite editor
+  await dragTo(
+    page,
+    item,
+    page.locator('.affine-paragraph-block-container').first()
+  );
+
+  await expect(page.locator('affine-embed-linked-doc-block')).toContainText(
+    'hi from page'
+  );
+});

tests/kit/utils/page-logic.ts

@@ -95,52 +95,88 @@ export const getPageByTitle = (page: Page, title: string) => {
   return page.getByTestId('page-list-item').getByText(title);
 };
 
+export type DragLocation =
+  | 'top-left'
+  | 'top'
+  | 'bottom'
+  | 'center'
+  | 'left'
+  | 'right';
+
+export const toPosition = (
+  rect: {
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+  },
+  location: DragLocation
+) => {
+  switch (location) {
+    case 'center':
+      return {
+        x: rect.width / 2,
+        y: rect.height / 2,
+      };
+    case 'top':
+      return { x: rect.width / 2, y: 1 };
+    case 'bottom':
+      return { x: rect.width / 2, y: rect.height - 1 };
+
+    case 'left':
+      return { x: 1, y: rect.height / 2 };
+
+    case 'right':
+      return { x: rect.width - 1, y: rect.height / 2 };
+
+    case 'top-left':
+    default:
+      return { x: 1, y: 1 };
+  }
+};
+
 export const dragTo = async (
   page: Page,
   locator: Locator,
   target: Locator,
-  location:
+  location: DragLocation = 'center'
-    | 'top-left'
-    | 'top'
-    | 'bottom'
-    | 'center'
-    | 'left'
-    | 'right' = 'center'
 ) => {
   await locator.hover();
+  const locatorElement = await locator.boundingBox();
+  if (!locatorElement) {
+    throw new Error('locator element not found');
+  }
+  const locatorCenter = toPosition(locatorElement, 'center');
+  await page.mouse.move(
+    locatorElement.x + locatorCenter.x,
+    locatorElement.y + locatorCenter.y
+  );
   await page.mouse.down();
-  await page.mouse.move(1, 1);
+  await page.waitForTimeout(100);
+  await page.mouse.move(
+    locatorElement.x + locatorCenter.x + 1,
+    locatorElement.y + locatorCenter.y + 1
+  );
+
+  await page.mouse.move(1, 1, {
+    steps: 10,
+  });
+
+  await target.hover();
 
   const targetElement = await target.boundingBox();
   if (!targetElement) {
     throw new Error('target element not found');
   }
-  const position = (() => {
+  const targetPosition = toPosition(targetElement, location);
-    switch (location) {
+  await page.mouse.move(
-      case 'center':
+    targetElement.x + targetPosition.x,
-        return {
+    targetElement.y + targetPosition.y,
-          x: targetElement.width / 2,
+    {
-          y: targetElement.height / 2,
+      steps: 10,
-        };
-      case 'top':
-        return { x: targetElement.width / 2, y: 1 };
-      case 'bottom':
-        return { x: targetElement.width / 2, y: targetElement.height - 1 };
-
-      case 'left':
-        return { x: 1, y: targetElement.height / 2 };
-
-      case 'right':
-        return { x: targetElement.width - 1, y: targetElement.height / 2 };
-
-      case 'top-left':
-      default:
-        return { x: 1, y: 1 };
     }
-  })();
+  );
-  await target.hover({
+  await page.waitForTimeout(100);
-    position: position,
-  });
   await page.mouse.up();
 };