抽出素材库框选几何模型

扩展 ImageCanvasAssetLibraryModel 承载文件夹命中和框选几何规则

让素材库 hook 保留 DOM 和后端副作用并调用纯模型

补充素材库几何模型单测覆盖置顶和反向框选

更新 TRACKING.md 记录第四十四执行批次验证

TRACKING.md

@@ -167,3 +167,5 @@
 - 2026-06-17 前端拆分第四十一执行批次：继续收口 `useImageCanvasGenerationWorkflow`，新增 `ImageCanvasGenerationDialogModel`，把普通生图 / 规范 / 角色形象 / 图标素材生成对话框草稿、修改图片 / 快速编辑 / 角色动画面板草稿、角色 / 图标参考选择、规范表单更新、图标描述更新、角色动画时长更新以及生成器失焦 / 关闭规则从 hook 中抽成纯模型；workflow hook 保留真实 API 调用、生成结果落画布、侧栏 / 工具 / 选中态副作用和错误回写。新增模型单测覆盖各类草稿、失败态清理、引用选择、描述限制、动画时长和 composer 可见性；`useImageCanvasGenerationWorkflow.ts` 从 1075 行降至 870 行。统一验证命令：`npm run test -- src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts src/components/image-editor/ImageCanvasUploadModel.test.ts src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts src/components/image-editor/ImageCanvasAssetRowView.test.tsx src/components/image-editor/ImageCanvasSidebarView.test.tsx src/components/image-editor/ImageCanvasBasicGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasCharacterGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasEditGenerationModalView.test.tsx src/components/image-editor/ImageCanvasEditorShellView.test.tsx src/components/image-editor/ImageCanvasBottomToolbarView.test.tsx src/components/image-editor/ImageCanvasPanelDockView.test.tsx src/components/image-editor/ImageCanvasContextMenusView.test.tsx src/components/image-editor/ImageCanvasSelectedLayerToolbarView.test.tsx src/components/image-editor/ImageCanvasIconSpritesheetComposerView.test.tsx src/components/image-editor/ImageCanvasSpecGenerationPanelView.test.tsx src/components/image-editor/ImageCanvasGenerationImageOptionsView.test.tsx src/components/image-editor/ImageCanvasQuickEditPanelView.test.tsx src/components/image-editor/ImageCanvasCharacterAnimationPanelView.test.tsx src/components/image-editor/ImageCanvasWorldView.test.tsx src/components/image-editor/useImageCanvasAssetLibrary.test.tsx src/components/image-editor/useImageCanvasGenerationSurface.test.tsx src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx src/components/image-editor/ImageCanvasEditorAssetsIntegration.test.tsx src/components/image-editor/ImageCanvasEditorGenerationIntegration.test.tsx src/components/image-editor/ImageCanvasEditorView.test.tsx`、`npm run typecheck`、`npm run check:encoding`、`git diff --check`；浏览器回归：`http://127.0.0.1:10007/editor/canvas` 临时 `XDG_CONFIG_HOME` 下 Chrome headless 打开成功，未登录显示 `账号入口`；关闭后 `画布背景设置` 可打开，点击 `暖灰` 后 viewport 背景为 `rgb(243, 240, 234)` 且 `background-image: none`；`打开图层` 切换后侧栏标题为 `图层`；点击 `生成工具` 后 `Image Generator`、`生成图片` 对话框和 `AI画布工具栏` 均可见，控制台仅有预期的未登录 `/api/auth/refresh` 401。
 - 2026-06-17 前端拆分第四十二执行批次：继续收口 `useImageCanvasStageInteractions`，新增 `ImageCanvasStageInteractionModel`，把 pointer button / client / id 归一化、画布框选初始状态、抓手平移拖拽状态、多选图层选择与图层拖拽初始状态、生成器 composer 随图层点击显隐、生成占位拖拽状态、小地图拖拽状态和拖拽阈值从 hook 中抽成纯模型；stage hook 保留 DOM 事件拦截、pointer capture / release、React 状态写入、拖拽移动执行和回调副作用。新增模型单测覆盖 pointer 兜底、中键识别、框选 / 平移状态、多选 toggle、组拖拽初始层快照、生成器 composer 规则、生成占位状态和小地图 click / drag 分流；`useImageCanvasStageInteractions.ts` 从 610 行降至 521 行。只读子代理复核结论：当前没有同一轮必须顺手拆的第二个明显大块，`ImageCanvasEditorView.tsx` 已主要是组合层，generation / asset / upload hooks 剩余复杂度多为异步编排或持久化副作用，后续应随具体需求再拆，避免过度碎片化。统一验证命令：`npm run test -- src/components/image-editor/ImageCanvasStageInteractionModel.test.ts src/components/image-editor/useImageCanvasStageInteractions.test.tsx`、`npm run test -- src/components/image-editor/ImageCanvasStageInteractionModel.test.ts src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts src/components/image-editor/ImageCanvasUploadModel.test.ts src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts src/components/image-editor/ImageCanvasAssetRowView.test.tsx src/components/image-editor/ImageCanvasSidebarView.test.tsx src/components/image-editor/ImageCanvasBasicGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasCharacterGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasEditGenerationModalView.test.tsx src/components/image-editor/ImageCanvasEditorShellView.test.tsx src/components/image-editor/ImageCanvasBottomToolbarView.test.tsx src/components/image-editor/ImageCanvasPanelDockView.test.tsx src/components/image-editor/ImageCanvasContextMenusView.test.tsx src/components/image-editor/ImageCanvasSelectedLayerToolbarView.test.tsx src/components/image-editor/ImageCanvasIconSpritesheetComposerView.test.tsx src/components/image-editor/ImageCanvasSpecGenerationPanelView.test.tsx src/components/image-editor/ImageCanvasGenerationImageOptionsView.test.tsx src/components/image-editor/ImageCanvasQuickEditPanelView.test.tsx src/components/image-editor/ImageCanvasCharacterAnimationPanelView.test.tsx src/components/image-editor/ImageCanvasWorldView.test.tsx src/components/image-editor/useImageCanvasAssetLibrary.test.tsx src/components/image-editor/useImageCanvasGenerationSurface.test.tsx src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx src/components/image-editor/useImageCanvasStageInteractions.test.tsx src/components/image-editor/ImageCanvasEditorAssetsIntegration.test.tsx src/components/image-editor/ImageCanvasEditorGenerationIntegration.test.tsx src/components/image-editor/ImageCanvasEditorView.test.tsx`、`npm run typecheck`、`npm run check:encoding`、`git diff --check`；浏览器回归：`http://127.0.0.1:10007/editor/canvas` 临时 `XDG_CONFIG_HOME` 下 Chrome headless 打开成功，未登录显示 `账号入口`；关闭后 `画布背景设置` 可打开，点击 `暖灰` 后 viewport 背景为 `rgb(243, 240, 234)` 且 `background-image: none`；`打开图层` 切换后侧栏标题为 `图层`；点击 `生成工具` 后 `Image Generator`、`生成图片` 对话框和 `AI画布工具栏` 均可见，控制台仅有预期的未登录 `/api/auth/refresh` 401。
 - 2026-06-17 前端拆分第四十三执行批次：继续收口 `useImageCanvasGenerationWorkflow`，新增 `useImageCanvasGenerationSubmissionWorkflow`，把普通生图 / 修改图 / 图标素材批量生成 / 快速编辑 / 角色动画的提交 API、提交中 / 失败 / 完成状态回写、生成结果落画布、选中图层、切换图层侧栏、适合视图和 last image model 记忆从入口 workflow 中抽成生成提交流水线 hook；原 workflow 保留生成入口、菜单开关、画布选取引用、表单字段更新、生成器关闭和删除图层后的状态清理，避免把 UI 选择态和提交态混在一起。新增 hook 单测覆盖 quick edit 成功 / 失败、edit 成功清理 modal、生成使用最新移动占位、icon 缺规范校验、icon 成功批量落图并记住模型、角色动画 completed / failed 状态机；同步修复新测试文件的 mock 隔离，避免 `vi.clearAllMocks()` 清空并行集成测试的调用记录；`useImageCanvasGenerationWorkflow.ts` 从 870 行降至 499 行。统一验证命令：`npm run test -- src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx`、`npm run test -- src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts src/components/image-editor/ImageCanvasEditorGenerationIntegration.test.tsx`、`npm run test -- src/components/image-editor/ImageCanvasStageInteractionModel.test.ts src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts src/components/image-editor/ImageCanvasUploadModel.test.ts src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts src/components/image-editor/ImageCanvasAssetRowView.test.tsx src/components/image-editor/ImageCanvasSidebarView.test.tsx src/components/image-editor/ImageCanvasBasicGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasCharacterGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasEditGenerationModalView.test.tsx src/components/image-editor/ImageCanvasEditorShellView.test.tsx src/components/image-editor/ImageCanvasBottomToolbarView.test.tsx src/components/image-editor/ImageCanvasPanelDockView.test.tsx src/components/image-editor/ImageCanvasContextMenusView.test.tsx src/components/image-editor/ImageCanvasSelectedLayerToolbarView.test.tsx src/components/image-editor/ImageCanvasIconSpritesheetComposerView.test.tsx src/components/image-editor/ImageCanvasSpecGenerationPanelView.test.tsx src/components/image-editor/ImageCanvasGenerationImageOptionsView.test.tsx src/components/image-editor/ImageCanvasQuickEditPanelView.test.tsx src/components/image-editor/ImageCanvasCharacterAnimationPanelView.test.tsx src/components/image-editor/ImageCanvasWorldView.test.tsx src/components/image-editor/useImageCanvasAssetLibrary.test.tsx src/components/image-editor/useImageCanvasGenerationSurface.test.tsx src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx src/components/image-editor/useImageCanvasStageInteractions.test.tsx src/components/image-editor/ImageCanvasEditorAssetsIntegration.test.tsx src/components/image-editor/ImageCanvasEditorGenerationIntegration.test.tsx src/components/image-editor/ImageCanvasEditorView.test.tsx`、`npm run typecheck`、`npm run check:encoding`、`git diff --check`；浏览器回归：`http://127.0.0.1:10007/editor/canvas` 临时 `XDG_CONFIG_HOME` 下 Chrome headless 打开成功，未登录显示 `账号入口`；关闭后 `画布背景设置` 可打开，点击 `暖灰` 后 viewport 背景为 `rgb(243, 240, 234)` 且 `background-image: none`；点击 `生成工具` 后 `Image Generator` 占位、`生成图片` 对话框和 `AI画布工具栏` 均可见，控制台仅有预期的未登录 `/api/auth/refresh` 401。
+- 2026-06-17 前端拆分第四十四执行批次：继续收口 `useImageCanvasAssetLibrary`，扩展 `ImageCanvasAssetLibraryModel`，把素材文件夹坐标命中、素材拖拽目标文件夹置顶判断、素材框选起点 / 移动 / 反向拖拽矩形归一化、框选只命中 uploaded 素材和框选启动规则从 hook 中抽成纯几何模型；asset library hook 保留 DOM 查询、dataset 读取、pointer capture / release、React 状态写入、后端 CRUD 和登录弹窗副作用，避免把 DOM 与服务调用塞进模型。新增模型单测覆盖文件夹边界命中、列表外返回空、文件夹 header 视野外置顶、反向框选归一化、边缘相交命中、忽略 built-in / unknown 素材；只读子代理复核同意优先抽 Rect/Point + folder hit + pinned + marquee selection，不继续拆新 hook。验证命令：`npm run test -- src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts src/components/image-editor/useImageCanvasAssetLibrary.test.tsx`、`npm run test -- src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts src/components/image-editor/useImageCanvasAssetLibrary.test.tsx src/components/image-editor/useImageCanvasAssetPointerDragBridge.test.tsx src/components/image-editor/useImageCanvasAssetCanvasBridge.test.tsx src/components/image-editor/ImageCanvasEditorAssetsIntegration.test.tsx src/components/image-editor/ImageCanvasEditorView.test.tsx`。
+- 2026-06-17 前端拆分第四十四执行批次验证补充：统一编辑器回归命令 `npm run test -- src/components/image-editor/ImageCanvasStageInteractionModel.test.ts src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts src/components/image-editor/ImageCanvasUploadModel.test.ts src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts src/components/image-editor/ImageCanvasAssetRowView.test.tsx src/components/image-editor/ImageCanvasSidebarView.test.tsx src/components/image-editor/ImageCanvasBasicGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasCharacterGenerationComposerView.test.tsx src/components/image-editor/ImageCanvasEditGenerationModalView.test.tsx src/components/image-editor/ImageCanvasEditorShellView.test.tsx src/components/image-editor/ImageCanvasBottomToolbarView.test.tsx src/components/image-editor/ImageCanvasPanelDockView.test.tsx src/components/image-editor/ImageCanvasContextMenusView.test.tsx src/components/image-editor/ImageCanvasSelectedLayerToolbarView.test.tsx src/components/image-editor/ImageCanvasIconSpritesheetComposerView.test.tsx src/components/image-editor/ImageCanvasSpecGenerationPanelView.test.tsx src/components/image-editor/ImageCanvasGenerationImageOptionsView.test.tsx src/components/image-editor/ImageCanvasQuickEditPanelView.test.tsx src/components/image-editor/ImageCanvasCharacterAnimationPanelView.test.tsx src/components/image-editor/ImageCanvasWorldView.test.tsx src/components/image-editor/useImageCanvasAssetLibrary.test.tsx src/components/image-editor/useImageCanvasGenerationSurface.test.tsx src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx src/components/image-editor/useImageCanvasStageInteractions.test.tsx src/components/image-editor/useImageCanvasAssetPointerDragBridge.test.tsx src/components/image-editor/useImageCanvasAssetCanvasBridge.test.tsx src/components/image-editor/ImageCanvasEditorAssetsIntegration.test.tsx src/components/image-editor/ImageCanvasEditorGenerationIntegration.test.tsx src/components/image-editor/ImageCanvasEditorView.test.tsx` 通过 33 个文件 / 219 个测试；`npm run typecheck`、`npm run check:encoding`、`git diff --check` 均通过。浏览器回归：`http://127.0.0.1:10007/editor/canvas` 使用 Playwright CLI headless 打开成功，未登录显示 `账号入口`；关闭登录后 `画布背景设置` 可打开，点击 `暖灰` 后 viewport 背景为 `rgb(243, 240, 234)` 且 `background-image: none`；默认素材侧栏显示 `素材` / `项目素材` / `上传到项目素材`，切换 `打开图层` 后侧栏显示 `图层`，点击 `生成工具` 后 `Image Generator` 占位、`生成图片` 对话框和 `AI画布工具栏` 均可见；网络请求仅有预期未登录 `/api/auth/refresh` 401，其余 editor smoke 相关请求正常。

src/components/image-editor/ImageCanvasAssetLibraryModel.test.ts

@@ -6,18 +6,24 @@ import type {
 } from './ImageCanvasEditorTypes';
 import {
   areAllSelectableAssetsSelected,
+  createAssetMarqueeFromPointer,
+  createAssetMarqueeSelectionRect,
   createLocalAssetFolder,
   deleteAssetFolderLocally,
   getSelectableAssets,
   groupAssetsByFolder,
   moveAssetToFolderLocally,
+  moveAssetMarqueeToPointer,
   removeAssetById,
   removeSelectedAssets,
   renameAssetById,
   renameAssetFolderById,
   replaceLocalAssetFolder,
   resolveAllAssetSelection,
+  resolveAssetFolderIdFromPoint,
   resolveDefaultAssetFolder,
+  resolvePinnedAssetMoveFolderId,
+  selectUploadedAssetsInRect,
   toggleAssetFolderCollapsed,
   toggleAssetSelection,
 } from './ImageCanvasAssetLibraryModel';
@@ -184,4 +190,139 @@ describe('ImageCanvasAssetLibraryModel', () => {
       moveAssetToFolderLocally([createAsset()], 'asset-a', 'folder-role')[0],
     ).toMatchObject({ folderId: 'folder-role' });
   });
+
+  it('resolves folder hit targets from pointer coordinates', () => {
+    const folders = [
+      {
+        folderId: 'project',
+        rect: { left: 10, right: 110, top: 10, bottom: 80 },
+      },
+      {
+        folderId: 'folder-role',
+        rect: { left: 10, right: 110, top: 81, bottom: 150 },
+      },
+    ];
+
+    expect(
+      resolveAssetFolderIdFromPoint({
+        point: { clientX: 40, clientY: 80 },
+        listRect: { left: 0, right: 140, top: 0, bottom: 180 },
+        folders,
+      }),
+    ).toBe('project');
+    expect(
+      resolveAssetFolderIdFromPoint({
+        point: { clientX: 5, clientY: 40 },
+        listRect: { left: 10, right: 140, top: 0, bottom: 180 },
+        folders,
+      }),
+    ).toBeNull();
+    expect(
+      resolveAssetFolderIdFromPoint({
+        point: { clientX: 120, clientY: 40 },
+        listRect: { left: 0, right: 140, top: 0, bottom: 180 },
+        folders,
+      }),
+    ).toBeNull();
+  });
+
+  it('pins asset move folder labels only when their header is outside the list viewport', () => {
+    const listRect = { left: 0, right: 120, top: 100, bottom: 240 };
+
+    expect(
+      resolvePinnedAssetMoveFolderId({
+        folderId: 'folder-role',
+        listRect,
+        headerRect: { left: 0, right: 120, top: 40, bottom: 80 },
+      }),
+    ).toBe('folder-role');
+    expect(
+      resolvePinnedAssetMoveFolderId({
+        folderId: 'folder-role',
+        listRect,
+        headerRect: { left: 0, right: 120, top: 260, bottom: 300 },
+      }),
+    ).toBe('folder-role');
+    expect(
+      resolvePinnedAssetMoveFolderId({
+        folderId: 'folder-role',
+        listRect,
+        headerRect: { left: 0, right: 120, top: 120, bottom: 150 },
+      }),
+    ).toBeNull();
+    expect(
+      resolvePinnedAssetMoveFolderId({
+        folderId: null,
+        listRect,
+        headerRect: { left: 0, right: 120, top: 40, bottom: 80 },
+      }),
+    ).toBeNull();
+  });
+
+  it('updates marquee geometry from pointer coordinates and normalizes reverse drags', () => {
+    const marquee = createAssetMarqueeFromPointer({
+      pointerId: 5,
+      point: { clientX: 180, clientY: 220 },
+      containerRect: { left: 100, top: 200 },
+    });
+
+    expect(marquee).toEqual({
+      pointerId: 5,
+      startX: 80,
+      startY: 20,
+      currentX: 80,
+      currentY: 20,
+    });
+    expect(
+      moveAssetMarqueeToPointer({
+        marquee,
+        point: { clientX: 120, clientY: 205 },
+        containerRect: { left: 100, top: 200 },
+      }),
+    ).toMatchObject({ currentX: 20, currentY: 5 });
+    expect(
+      createAssetMarqueeSelectionRect({
+        marquee,
+        point: { clientX: 120, clientY: 205 },
+        containerRect: { left: 100, top: 200 },
+      }),
+    ).toEqual({
+      left: 120,
+      right: 180,
+      top: 205,
+      bottom: 220,
+    });
+  });
+
+  it('selects only uploaded assets intersecting the marquee rectangle', () => {
+    const assets = [
+      createAsset({ id: 'asset-a' }),
+      createAsset({ id: 'asset-b' }),
+      createAsset({ id: 'built-in', sourceKind: 'built-in' }),
+    ];
+    const selectedIds = selectUploadedAssetsInRect({
+      assets,
+      assetTargets: [
+        {
+          assetId: 'asset-a',
+          rect: { left: 10, right: 20, top: 10, bottom: 20 },
+        },
+        {
+          assetId: 'asset-b',
+          rect: { left: 30, right: 40, top: 30, bottom: 40 },
+        },
+        {
+          assetId: 'built-in',
+          rect: { left: 15, right: 25, top: 15, bottom: 25 },
+        },
+        {
+          assetId: 'missing',
+          rect: { left: 15, right: 25, top: 15, bottom: 25 },
+        },
+      ],
+      selectionRect: { left: 20, right: 35, top: 20, bottom: 35 },
+    });
+
+    expect([...selectedIds]).toEqual(['asset-a', 'asset-b']);
+  });
 });

src/components/image-editor/ImageCanvasAssetLibraryModel.ts

@@ -1,12 +1,178 @@
 import type {
+  AssetMarqueeState,
   EditorAsset,
   EditorAssetFolder,
 } from './ImageCanvasEditorTypes';
 
+type ClientRectLike = Pick<DOMRect, 'bottom' | 'left' | 'right' | 'top'>;
+
+type ClientPoint = {
+  clientX: number;
+  clientY: number;
+};
+
+type AssetFolderHitTarget = {
+  folderId: string;
+  rect: ClientRectLike;
+};
+
+type AssetHitTarget = {
+  assetId: string;
+  rect: ClientRectLike;
+};
+
 export type GroupedAssetFolder = EditorAssetFolder & {
   assets: EditorAsset[];
 };
 
+function isPointInRect(point: ClientPoint, rect: ClientRectLike) {
+  return (
+    point.clientX >= rect.left &&
+    point.clientX <= rect.right &&
+    point.clientY >= rect.top &&
+    point.clientY <= rect.bottom
+  );
+}
+
+function doRectsIntersect(rect: ClientRectLike, selectionRect: ClientRectLike) {
+  return (
+    rect.left <= selectionRect.right &&
+    rect.right >= selectionRect.left &&
+    rect.top <= selectionRect.bottom &&
+    rect.bottom >= selectionRect.top
+  );
+}
+
+export function resolveAssetFolderIdFromPoint({
+  point,
+  listRect,
+  folders,
+}: {
+  point: ClientPoint;
+  listRect: ClientRectLike | null | undefined;
+  folders: AssetFolderHitTarget[];
+}) {
+  if (!listRect || !isPointInRect(point, listRect)) {
+    return null;
+  }
+  const matchedFolder = folders.find((folder) =>
+    isPointInRect(point, folder.rect),
+  );
+  return matchedFolder?.folderId ?? null;
+}
+
+export function resolvePinnedAssetMoveFolderId({
+  folderId,
+  listRect,
+  headerRect,
+}: {
+  folderId: string | null;
+  listRect: ClientRectLike | null | undefined;
+  headerRect: ClientRectLike | null | undefined;
+}) {
+  if (
+    !folderId ||
+    !listRect ||
+    !headerRect ||
+    (headerRect.bottom >= listRect.top && headerRect.top <= listRect.bottom)
+  ) {
+    return null;
+  }
+  return folderId;
+}
+
+export function shouldStartAssetMarquee({
+  isAssetSelectionMode,
+  button,
+  isBlockedTarget,
+}: {
+  isAssetSelectionMode: boolean;
+  button: number;
+  isBlockedTarget: boolean;
+}) {
+  return isAssetSelectionMode && button === 0 && !isBlockedTarget;
+}
+
+export function createAssetMarqueeFromPointer({
+  pointerId,
+  point,
+  containerRect,
+}: {
+  pointerId: number;
+  point: ClientPoint;
+  containerRect: Pick<DOMRect, 'left' | 'top'> | null | undefined;
+}): AssetMarqueeState {
+  const startX = point.clientX - (containerRect?.left ?? 0);
+  const startY = point.clientY - (containerRect?.top ?? 0);
+  return {
+    pointerId,
+    startX,
+    startY,
+    currentX: startX,
+    currentY: startY,
+  };
+}
+
+export function moveAssetMarqueeToPointer({
+  marquee,
+  point,
+  containerRect,
+}: {
+  marquee: AssetMarqueeState;
+  point: ClientPoint;
+  containerRect: Pick<DOMRect, 'left' | 'top'> | null | undefined;
+}) {
+  return {
+    ...marquee,
+    currentX: point.clientX - (containerRect?.left ?? 0),
+    currentY: point.clientY - (containerRect?.top ?? 0),
+  };
+}
+
+export function createAssetMarqueeSelectionRect({
+  marquee,
+  point,
+  containerRect,
+}: {
+  marquee: AssetMarqueeState;
+  point: ClientPoint;
+  containerRect: Pick<DOMRect, 'left' | 'top'> | null | undefined;
+}): ClientRectLike {
+  const startClientX = (containerRect?.left ?? 0) + marquee.startX;
+  const startClientY = (containerRect?.top ?? 0) + marquee.startY;
+  return {
+    left: Math.min(startClientX, point.clientX),
+    right: Math.max(startClientX, point.clientX),
+    top: Math.min(startClientY, point.clientY),
+    bottom: Math.max(startClientY, point.clientY),
+  };
+}
+
+export function selectUploadedAssetsInRect({
+  assets,
+  assetTargets,
+  selectionRect,
+}: {
+  assets: EditorAsset[];
+  assetTargets: AssetHitTarget[];
+  selectionRect: ClientRectLike;
+}) {
+  const uploadedAssetIds = new Set(
+    assets
+      .filter((asset) => asset.sourceKind === 'uploaded')
+      .map((asset) => asset.id),
+  );
+  return new Set(
+    assetTargets
+      .filter(
+        (target) =>
+          uploadedAssetIds.has(target.assetId) &&
+          doRectsIntersect(target.rect, selectionRect),
+      )
+      .map((target) => target.assetId),
+  );
+}
+
 export function groupAssetsByFolder(
   assetFolders: EditorAssetFolder[],
   assets: EditorAsset[],

src/components/image-editor/useImageCanvasAssetLibrary.ts

@@ -25,11 +25,14 @@ import {
 } from './ImageCanvasEditorModel';
 import {
   areAllSelectableAssetsSelected,
+  createAssetMarqueeFromPointer,
+  createAssetMarqueeSelectionRect,
   createLocalAssetFolder,
   deleteAssetFolderLocally,
   getSelectableAssets,
   groupAssetsByFolder,
   moveAssetToFolderLocally,
+  moveAssetMarqueeToPointer,
   removeAssetById,
   removeSelectedAssets,
   renameAssetById,
@@ -37,6 +40,10 @@ import {
   replaceLocalAssetFolder,
   resolveAllAssetSelection,
   resolveDefaultAssetFolder,
+  resolveAssetFolderIdFromPoint,
+  resolvePinnedAssetMoveFolderId,
+  selectUploadedAssetsInRect,
+  shouldStartAssetMarquee,
   toggleAssetFolderCollapsed,
   toggleAssetSelection,
 } from './ImageCanvasAssetLibraryModel';
@@ -55,6 +62,43 @@ function isEditorAuthError(error: unknown) {
   );
 }
 
+const ASSET_FOLDER_SELECTOR = '[data-asset-folder-id]';
+const ASSET_ITEM_SELECTOR = '[data-asset-id]';
+const ASSET_MARQUEE_BLOCKED_TARGET_SELECTOR =
+  'button, input, textarea, select, [data-asset-id]';
+
+function readAssetFolderHitTargets(listElement: ParentNode | null) {
+  return [
+    ...(listElement?.querySelectorAll<HTMLElement>(ASSET_FOLDER_SELECTOR) ?? []),
+  ]
+    .map((element) => {
+      const folderId = element.dataset.assetFolderId;
+      return folderId
+        ? {
+            folderId,
+            rect: element.getBoundingClientRect(),
+          }
+        : null;
+    })
+    .filter((target): target is NonNullable<typeof target> => Boolean(target));
+}
+
+function readAssetHitTargets(listElement: ParentNode | null) {
+  return [
+    ...(listElement?.querySelectorAll<HTMLElement>(ASSET_ITEM_SELECTOR) ?? []),
+  ]
+    .map((element) => {
+      const assetId = element.dataset.assetId;
+      return assetId
+        ? {
+            assetId,
+            rect: element.getBoundingClientRect(),
+          }
+        : null;
+    })
+    .filter((target): target is NonNullable<typeof target> => Boolean(target));
+}
+
 export function useImageCanvasAssetLibrary({
   assetListRef,
   canAccessProtectedData,
@@ -145,28 +189,11 @@ export function useImageCanvasAssetLibrary({
       if (!listElement) {
         return null;
       }
-      const listRect = listElement.getBoundingClientRect();
-      if (
-        clientX < listRect.left ||
-        clientX > listRect.right ||
-        clientY < listRect.top ||
-        clientY > listRect.bottom
-      ) {
-        return null;
-      }
-      const folderElements = [
-        ...listElement.querySelectorAll<HTMLElement>('[data-asset-folder-id]'),
-      ];
-      const matchedFolder = folderElements.find((element) => {
-        const rect = element.getBoundingClientRect();
-        return (
-          clientX >= rect.left &&
-          clientX <= rect.right &&
-          clientY >= rect.top &&
-          clientY <= rect.bottom
-        );
+      return resolveAssetFolderIdFromPoint({
+        point: { clientX, clientY },
+        listRect: listElement.getBoundingClientRect(),
+        folders: readAssetFolderHitTargets(listElement),
       });
-      return matchedFolder?.dataset.assetFolderId ?? null;
     },
     [assetListRef],
   );
@@ -182,14 +209,12 @@ export function useImageCanvasAssetLibrary({
       const header = listElement?.querySelector<HTMLElement>(
         `[data-asset-folder-header-id="${escapeCssIdentifier(folderId)}"]`,
       );
-      const listRect = listElement?.getBoundingClientRect();
-      const headerRect = header?.getBoundingClientRect();
       setPinnedAssetMoveFolderId(
-        listRect &&
-          headerRect &&
-          (headerRect.bottom < listRect.top || headerRect.top > listRect.bottom)
-          ? folderId
-          : null,
+        resolvePinnedAssetMoveFolderId({
+          folderId,
+          listRect: listElement?.getBoundingClientRect(),
+          headerRect: header?.getBoundingClientRect(),
+        }),
       );
     },
     [assetListRef],
@@ -418,56 +443,40 @@ export function useImageCanvasAssetLibrary({
       top: number;
       bottom: number;
     }) => {
-      const nextSelectedIds = new Set<string>();
-      assetListRef.current
-        ?.querySelectorAll<HTMLElement>('[data-asset-id]')
-        .forEach((element) => {
-          const assetId = element.dataset.assetId;
-          if (!assetId) {
-            return;
-          }
-          const asset = assets.find(
-            (currentAsset) => currentAsset.id === assetId,
-          );
-          if (!asset || asset.sourceKind !== 'uploaded') {
-            return;
-          }
-          const rect = element.getBoundingClientRect();
-          const intersects =
-            rect.left <= selectionRect.right &&
-            rect.right >= selectionRect.left &&
-            rect.top <= selectionRect.bottom &&
-            rect.bottom >= selectionRect.top;
-          if (intersects) {
-            nextSelectedIds.add(assetId);
-          }
-        });
-      setSelectedAssetIds(nextSelectedIds);
+      setSelectedAssetIds(
+        selectUploadedAssetsInRect({
+          assets,
+          assetTargets: readAssetHitTargets(assetListRef.current),
+          selectionRect,
+        }),
+      );
     },
     [assetListRef, assets],
   );
 
   const handleAssetMarqueePointerDown = useCallback(
     (event: ReactPointerEvent<HTMLDivElement>) => {
-      if (!isAssetSelectionMode || event.button !== 0) {
-        return;
-      }
       const target = event.target as HTMLElement;
-      if (target.closest('button, input, textarea, select, [data-asset-id]')) {
+      if (
+        !shouldStartAssetMarquee({
+          isAssetSelectionMode,
+          button: event.button,
+          isBlockedTarget: Boolean(
+            target.closest(ASSET_MARQUEE_BLOCKED_TARGET_SELECTOR),
+          ),
+        })
+      ) {
         return;
       }
       event.preventDefault();
       assetListRef.current?.setPointerCapture?.(event.pointerId);
-      const rect = assetListRef.current?.getBoundingClientRect();
-      const startX = event.clientX - (rect?.left ?? 0);
-      const startY = event.clientY - (rect?.top ?? 0);
-      setAssetMarquee({
-        pointerId: event.pointerId,
-        startX,
-        startY,
-        currentX: startX,
-        currentY: startY,
-      });
+      setAssetMarquee(
+        createAssetMarqueeFromPointer({
+          pointerId: event.pointerId,
+          point: event,
+          containerRect: assetListRef.current?.getBoundingClientRect(),
+        }),
+      );
       setSelectedAssetIds(new Set());
     },
     [assetListRef, isAssetSelectionMode],
@@ -480,25 +489,22 @@ export function useImageCanvasAssetLibrary({
       }
       event.preventDefault();
       const containerRect = assetListRef.current?.getBoundingClientRect();
-      const currentX = event.clientX - (containerRect?.left ?? 0);
-      const currentY = event.clientY - (containerRect?.top ?? 0);
-      const startClientX = (containerRect?.left ?? 0) + assetMarquee.startX;
-      const startClientY = (containerRect?.top ?? 0) + assetMarquee.startY;
       setAssetMarquee((currentMarquee) =>
         currentMarquee
-          ? {
-              ...currentMarquee,
-              currentX,
-              currentY,
-            }
+          ? moveAssetMarqueeToPointer({
+              marquee: currentMarquee,
+              point: event,
+              containerRect,
+            })
           : null,
       );
-      updateAssetSelectionFromMarquee({
-        left: Math.min(startClientX, event.clientX),
-        right: Math.max(startClientX, event.clientX),
-        top: Math.min(startClientY, event.clientY),
-        bottom: Math.max(startClientY, event.clientY),
-      });
+      updateAssetSelectionFromMarquee(
+        createAssetMarqueeSelectionRect({
+          marquee: assetMarquee,
+          point: event,
+          containerRect,
+        }),
+      );
     },
     [assetListRef, assetMarquee, updateAssetSelectionFromMarquee],
   );