refactor: code clean up (#3681)

* refactor: code clean up
Move types from App.tsx to types.ts
Move excalidrawPackage.test.tsx inside src/tests/package

* import type

src/components/App.tsx

 import { LinearElementEditor } from "../element/linearElementEditor";
 import { mutateElement } from "../element/mutateElement";
 import { deepCopyElement, newFreeDrawElement } from "../element/newElement";
-import { MaybeTransformHandleType } from "../element/transformHandles";
 import {
   isBindingElement,
   isBindingElementType,
 import {
   AppProps,
   AppState,
+  ExcalidrawImperativeAPI,
   Gesture,
   GestureEvent,
   LibraryItems,
+  PointerDownState,
   SceneData,
 } from "../types";
 import {
   isToolIcon,
   isWritableElement,
   resetCursor,
-  ResolvablePromise,
   resolvablePromise,
   sceneCoordsToViewportCoords,
   setCursor,
   initialScale: null,
 };
 
-export type PointerDownState = Readonly<{
-  // The first position at which pointerDown happened
-  origin: Readonly<{ x: number; y: number }>;
-  // Same as "origin" but snapped to the grid, if grid is on
-  originInGrid: Readonly<{ x: number; y: number }>;
-  // Scrollbar checks
-  scrollbars: ReturnType<typeof isOverScrollBars>;
-  // The previous pointer position
-  lastCoords: { x: number; y: number };
-  // map of original elements data
-  originalElements: Map<string, NonDeleted<ExcalidrawElement>>;
-  resize: {
-    // Handle when resizing, might change during the pointer interaction
-    handleType: MaybeTransformHandleType;
-    // This is determined on the initial pointer down event
-    isResizing: boolean;
-    // This is determined on the initial pointer down event
-    offset: { x: number; y: number };
-    // This is determined on the initial pointer down event
-    arrowDirection: "origin" | "end";
-    // This is a center point of selected elements determined on the initial pointer down event (for rotation only)
-    center: { x: number; y: number };
-  };
-  hit: {
-    // The element the pointer is "hitting", is determined on the initial
-    // pointer down event
-    element: NonDeleted<ExcalidrawElement> | null;
-    // The elements the pointer is "hitting", is determined on the initial
-    // pointer down event
-    allHitElements: NonDeleted<ExcalidrawElement>[];
-    // This is determined on the initial pointer down event
-    wasAddedToSelection: boolean;
-    // Whether selected element(s) were duplicated, might change during the
-    // pointer interaction
-    hasBeenDuplicated: boolean;
-    hasHitCommonBoundingBoxOfSelectedElements: boolean;
-  };
-  withCmdOrCtrl: boolean;
-  drag: {
-    // Might change during the pointer interation
-    hasOccurred: boolean;
-    // Might change during the pointer interation
-    offset: { x: number; y: number } | null;
-  };
-  // We need to have these in the state so that we can unsubscribe them
-  eventListeners: {
-    // It's defined on the initial pointer down event
-    onMove: null | ((event: PointerEvent) => void);
-    // It's defined on the initial pointer down event
-    onUp: null | ((event: PointerEvent) => void);
-    // It's defined on the initial pointer down event
-    onKeyDown: null | ((event: KeyboardEvent) => void);
-    // It's defined on the initial pointer down event
-    onKeyUp: null | ((event: KeyboardEvent) => void);
-  };
-}>;
-
-export type ExcalidrawImperativeAPI = {
-  updateScene: InstanceType<typeof App>["updateScene"];
-  resetScene: InstanceType<typeof App>["resetScene"];
-  getSceneElementsIncludingDeleted: InstanceType<
-    typeof App
-  >["getSceneElementsIncludingDeleted"];
-  history: {
-    clear: InstanceType<typeof App>["resetHistory"];
-  };
-  scrollToContent: InstanceType<typeof App>["scrollToContent"];
-  getSceneElements: InstanceType<typeof App>["getSceneElements"];
-  getAppState: () => InstanceType<typeof App>["state"];
-  refresh: InstanceType<typeof App>["refresh"];
-  importLibrary: InstanceType<typeof App>["importLibraryFromUrl"];
-  setToastMessage: InstanceType<typeof App>["setToastMessage"];
-  readyPromise: ResolvablePromise<ExcalidrawImperativeAPI>;
-  ready: true;
-  id: string;
-};
-
 class App extends React.Component<AppProps, AppState> {
   canvas: HTMLCanvasElement | null = null;
   rc: RoughCanvas | null = null;

src/data/library.ts

 import { LibraryItems, LibraryItem } from "../types";
 import { restoreElements } from "./restore";
 import { getNonDeletedElements } from "../element";
-import App from "../components/App";
+import type App from "../components/App";
 
 class Library {
   private libraryCache: LibraryItems | null = null;

src/element/dragElements.ts

 import { getPerfectElementSize } from "./sizeHelpers";
 import Scene from "../scene/Scene";
 import { NonDeletedExcalidrawElement } from "./types";
-import { PointerDownState } from "../components/App";
+import { PointerDownState } from "../types";
 
 export const dragSelectedElements = (
   pointerDownState: PointerDownState,

src/element/resizeElements.ts

   MaybeTransformHandleType,
   TransformHandleDirection,
 } from "./transformHandles";
-import { PointerDownState } from "../components/App";
-import { Point } from "../types";
+import { Point, PointerDownState } from "../types";
 
 export const normalizeAngle = (angle: number): number => {
   if (angle >= 2 * Math.PI) {

src/excalidraw-app/collab/CollabWrapper.tsx

 import throttle from "lodash.throttle";
 import React, { PureComponent } from "react";
-import { ExcalidrawImperativeAPI } from "../../components/App";
+import { ExcalidrawImperativeAPI } from "../../types";
 import { ErrorDialog } from "../../components/ErrorDialog";
 import { APP_NAME, ENV, EVENT } from "../../constants";
 import { ImportedDataState } from "../../data/types";

src/excalidraw-app/index.tsx

 } from "react";
 import { trackEvent } from "../analytics";
 import { getDefaultAppState } from "../appState";
-import { ExcalidrawImperativeAPI } from "../components/App";
 import { ErrorDialog } from "../components/ErrorDialog";
 import { TopErrorBoundary } from "../components/TopErrorBoundary";
 import {
   defaultLang,
   languages,
 } from "../packages/excalidraw/index";
-import { AppState, LibraryItems } from "../types";
+import { AppState, LibraryItems, ExcalidrawImperativeAPI } from "../types";
 import {
   debounce,
   getVersion,

src/tests/excalidrawPackage.test.tsx → src/tests/packages/excalidraw.test.tsx

 import React from "react";
-import { fireEvent, GlobalTestState, render } from "./test-utils";
-import Excalidraw from "../packages/excalidraw/index";
+import { fireEvent, GlobalTestState, render } from "../test-utils";
+import Excalidraw from "../../packages/excalidraw/index";
 import { queryByText, queryByTestId } from "@testing-library/react";
-import { GRID_SIZE } from "../constants";
-import { t } from "../i18n";
+import { GRID_SIZE } from "../../constants";
+import { t } from "../../i18n";
 
 const { h } = window;
 

src/types.ts

 import { LinearElementEditor } from "./element/linearElementEditor";
 import { SuggestedBinding } from "./element/binding";
 import { ImportedDataState } from "./data/types";
-import { ExcalidrawImperativeAPI } from "./components/App";
+import type App from "./components/App";
 import type { ResolvablePromise } from "./utils";
 import { Spreadsheet } from "./charts";
 import { Language } from "./i18n";
 import { ClipboardData } from "./clipboard";
+import { isOverScrollBars } from "./scene";
+import { MaybeTransformHandleType } from "./element/transformHandles";
 
 export type Point = Readonly<RoughPoint>;
 
   detectScroll: boolean;
   handleKeyboardGlobally: boolean;
 };
+
+export type PointerDownState = Readonly<{
+  // The first position at which pointerDown happened
+  origin: Readonly<{ x: number; y: number }>;
+  // Same as "origin" but snapped to the grid, if grid is on
+  originInGrid: Readonly<{ x: number; y: number }>;
+  // Scrollbar checks
+  scrollbars: ReturnType<typeof isOverScrollBars>;
+  // The previous pointer position
+  lastCoords: { x: number; y: number };
+  // map of original elements data
+  originalElements: Map<string, NonDeleted<ExcalidrawElement>>;
+  resize: {
+    // Handle when resizing, might change during the pointer interaction
+    handleType: MaybeTransformHandleType;
+    // This is determined on the initial pointer down event
+    isResizing: boolean;
+    // This is determined on the initial pointer down event
+    offset: { x: number; y: number };
+    // This is determined on the initial pointer down event
+    arrowDirection: "origin" | "end";
+    // This is a center point of selected elements determined on the initial pointer down event (for rotation only)
+    center: { x: number; y: number };
+  };
+  hit: {
+    // The element the pointer is "hitting", is determined on the initial
+    // pointer down event
+    element: NonDeleted<ExcalidrawElement> | null;
+    // The elements the pointer is "hitting", is determined on the initial
+    // pointer down event
+    allHitElements: NonDeleted<ExcalidrawElement>[];
+    // This is determined on the initial pointer down event
+    wasAddedToSelection: boolean;
+    // Whether selected element(s) were duplicated, might change during the
+    // pointer interaction
+    hasBeenDuplicated: boolean;
+    hasHitCommonBoundingBoxOfSelectedElements: boolean;
+  };
+  withCmdOrCtrl: boolean;
+  drag: {
+    // Might change during the pointer interation
+    hasOccurred: boolean;
+    // Might change during the pointer interation
+    offset: { x: number; y: number } | null;
+  };
+  // We need to have these in the state so that we can unsubscribe them
+  eventListeners: {
+    // It's defined on the initial pointer down event
+    onMove: null | ((event: PointerEvent) => void);
+    // It's defined on the initial pointer down event
+    onUp: null | ((event: PointerEvent) => void);
+    // It's defined on the initial pointer down event
+    onKeyDown: null | ((event: KeyboardEvent) => void);
+    // It's defined on the initial pointer down event
+    onKeyUp: null | ((event: KeyboardEvent) => void);
+  };
+}>;
+
+export type ExcalidrawImperativeAPI = {
+  updateScene: InstanceType<typeof App>["updateScene"];
+  resetScene: InstanceType<typeof App>["resetScene"];
+  getSceneElementsIncludingDeleted: InstanceType<
+    typeof App
+  >["getSceneElementsIncludingDeleted"];
+  history: {
+    clear: InstanceType<typeof App>["resetHistory"];
+  };
+  scrollToContent: InstanceType<typeof App>["scrollToContent"];
+  getSceneElements: InstanceType<typeof App>["getSceneElements"];
+  getAppState: () => InstanceType<typeof App>["state"];
+  refresh: InstanceType<typeof App>["refresh"];
+  importLibrary: InstanceType<typeof App>["importLibraryFromUrl"];
+  setToastMessage: InstanceType<typeof App>["setToastMessage"];
+  readyPromise: ResolvablePromise<ExcalidrawImperativeAPI>;
+  ready: true;
+  id: string;
+};