excalidraw/src/appState.ts

import { AppState, FlooredNumber } from "./types";
import { getDateTime } from "./utils";

const DEFAULT_PROJECT_NAME = `excalidraw-${getDateTime()}`;
export const DEFAULT_FONT = "20px Virgil";

export function getDefaultAppState(): AppState {
  return {
    draggingElement: null,
    resizingElement: null,
    multiElement: null,
    editingElement: null,
    elementType: "selection",
    elementLocked: false,
    exportBackground: true,
    currentItemStrokeColor: "#000000",
    currentItemBackgroundColor: "transparent",
    currentItemFillStyle: "hachure",
    currentItemStrokeWidth: 1,
    currentItemRoughness: 1,
    currentItemOpacity: 100,
    currentItemFont: DEFAULT_FONT,
    viewBackgroundColor: "#ffffff",
    scrollX: 0 as FlooredNumber,
    scrollY: 0 as FlooredNumber,
    cursorX: 0,
    cursorY: 0,
    scrolledOutside: false,
    name: DEFAULT_PROJECT_NAME,
    isCollaborating: false,
    isResizing: false,
    selectionElement: null,
    zoom: 1,
    openMenu: null,
    lastPointerDownWith: "mouse",
    selectedElementIds: {},
    remotePointers: {},
    collaboratorCount: 0,
  };
}

export function clearAppStateForLocalStorage(appState: AppState) {
  const {
    draggingElement,
    resizingElement,
    multiElement,
    editingElement,
    selectionElement,
    isResizing,
    ...exportedState
  } = appState;
  return exportedState;
}

export function clearAppStatePropertiesForHistory(
  appState: AppState,
): Partial<AppState> {
  return {
    exportBackground: appState.exportBackground,
    currentItemStrokeColor: appState.currentItemStrokeColor,
    currentItemBackgroundColor: appState.currentItemBackgroundColor,
    currentItemFillStyle: appState.currentItemFillStyle,
    currentItemStrokeWidth: appState.currentItemStrokeWidth,
    currentItemRoughness: appState.currentItemRoughness,
    currentItemOpacity: appState.currentItemOpacity,
    currentItemFont: appState.currentItemFont,
    viewBackgroundColor: appState.viewBackgroundColor,
    name: appState.name,
  };
}

export function cleanAppStateForExport(appState: AppState) {
  return {
    viewBackgroundColor: appState.viewBackgroundColor,
  };
}