Source-Code: Whiteboard TypeScript-Quellen, Live-Bundles, Excalidraw-Upstream-Constants

2026-07-02 15:32:04 +00:00
parent 5a7db008ee
commit 6754548957
13 changed files with 7097 additions and 8 deletions
@@ -0,0 +1,555 @@
+import type {
+  ExcalidrawElement,
+  FontFamilyValues,
+} from "@excalidraw/element/types";
+import type { AppProps, AppState } from "@excalidraw/excalidraw/types";
+
+import { COLOR_PALETTE } from "./colors";
+
+export const supportsResizeObserver =
+  typeof window !== "undefined" && "ResizeObserver" in window;
+
+export const APP_NAME = "Excalidraw";
+
+// distance when creating text before it's considered `autoResize: false`
+// we're using higher threshold so that clicks that end up being drags
+// don't unintentionally create text elements that are wrapped to a few chars
+// (happens a lot with fast clicks with the text tool)
+export const TEXT_AUTOWRAP_THRESHOLD = 36; // px
+export const DRAGGING_THRESHOLD = 10; // px
+export const MINIMUM_ARROW_SIZE = 20; // px
+export const LINE_CONFIRM_THRESHOLD = 8; // px
+export const ELEMENT_SHIFT_TRANSLATE_AMOUNT = 5;
+export const ELEMENT_TRANSLATE_AMOUNT = 1;
+export const TEXT_TO_CENTER_SNAP_THRESHOLD = 30;
+export const SHIFT_LOCKING_ANGLE = Math.PI / 12;
+export const DEFAULT_LASER_COLOR = "red";
+export const CURSOR_TYPE = {
+  TEXT: "text",
+  CROSSHAIR: "crosshair",
+  GRABBING: "grabbing",
+  GRAB: "grab",
+  POINTER: "pointer",
+  MOVE: "move",
+  AUTO: "",
+};
+export const POINTER_BUTTON = {
+  MAIN: 0,
+  WHEEL: 1,
+  SECONDARY: 2,
+  TOUCH: -1,
+  ERASER: 5,
+} as const;
+
+export const POINTER_EVENTS = {
+  enabled: "all",
+  disabled: "none",
+  // asserted as any so it can be freely assigned to React Element
+  // "pointerEnvets" CSS prop
+  inheritFromUI: "var(--ui-pointerEvents)" as any,
+} as const;
+
+export enum EVENT {
+  COPY = "copy",
+  PASTE = "paste",
+  CUT = "cut",
+  KEYDOWN = "keydown",
+  KEYUP = "keyup",
+  MOUSE_MOVE = "mousemove",
+  RESIZE = "resize",
+  UNLOAD = "unload",
+  FOCUS = "focus",
+  BLUR = "blur",
+  DRAG_OVER = "dragover",
+  DROP = "drop",
+  GESTURE_END = "gestureend",
+  BEFORE_UNLOAD = "beforeunload",
+  GESTURE_START = "gesturestart",
+  GESTURE_CHANGE = "gesturechange",
+  POINTER_MOVE = "pointermove",
+  POINTER_DOWN = "pointerdown",
+  POINTER_UP = "pointerup",
+  STATE_CHANGE = "statechange",
+  WHEEL = "wheel",
+  TOUCH_START = "touchstart",
+  TOUCH_END = "touchend",
+  HASHCHANGE = "hashchange",
+  VISIBILITY_CHANGE = "visibilitychange",
+  SCROLL = "scroll",
+  // custom events
+  EXCALIDRAW_LINK = "excalidraw-link",
+  MENU_ITEM_SELECT = "menu.itemSelect",
+  MESSAGE = "message",
+  FULLSCREENCHANGE = "fullscreenchange",
+}
+
+export const YOUTUBE_STATES = {
+  UNSTARTED: -1,
+  ENDED: 0,
+  PLAYING: 1,
+  PAUSED: 2,
+  BUFFERING: 3,
+  CUED: 5,
+} as const;
+
+export const ENV = {
+  TEST: "test",
+  DEVELOPMENT: "development",
+  PRODUCTION: "production",
+};
+
+export const CLASSES = {
+  SIDEBAR: "sidebar",
+  SHAPE_ACTIONS_MENU: "App-menu__left",
+  ZOOM_ACTIONS: "zoom-actions",
+  SEARCH_MENU_INPUT_WRAPPER: "layer-ui__search-inputWrapper",
+  CONVERT_ELEMENT_TYPE_POPUP: "ConvertElementTypePopup",
+  SHAPE_ACTIONS_THEME_SCOPE: "shape-actions-theme-scope",
+  FRAME_NAME: "frame-name",
+  DROPDOWN_MENU_EVENT_WRAPPER: "dropdown-menu-event-wrapper",
+};
+
+export const FONT_SIZES = {
+  sm: 16,
+  md: 20,
+  lg: 28,
+  xl: 36,
+} as const;
+
+export const CJK_HAND_DRAWN_FALLBACK_FONT = "Xiaolai";
+export const WINDOWS_EMOJI_FALLBACK_FONT = "Segoe UI Emoji";
+
+/**
+ * // TODO: shouldn't be really `const`, likely neither have integers as values, due to value for the custom fonts, which should likely be some hash.
+ *
+ * Let's think this through and consider:
+ * - https://developer.mozilla.org/en-US/docs/Web/CSS/generic-family
+ * - https://drafts.csswg.org/css-fonts-4/#font-family-prop
+ * - https://learn.microsoft.com/en-us/typography/opentype/spec/ibmfc
+ */
+export const FONT_FAMILY = {
+  Virgil: 1,
+  Helvetica: 2,
+  Cascadia: 3,
+  // leave 4 unused as it was historically used for Assistant (which we don't use anymore) or custom font (Obsidian)
+  Excalifont: 5,
+  Nunito: 6,
+  "Lilita One": 7,
+  "Comic Shanns": 8,
+  "Liberation Sans": 9,
+  Assistant: 10,
+};
+
+// Segoe UI Emoji fails to properly fallback for some glyphs: ∞, ∫, ≠
+// so we need to have generic font fallback before it
+export const SANS_SERIF_GENERIC_FONT = "sans-serif";
+export const MONOSPACE_GENERIC_FONT = "monospace";
+
+export const FONT_FAMILY_GENERIC_FALLBACKS = {
+  [SANS_SERIF_GENERIC_FONT]: 998,
+  [MONOSPACE_GENERIC_FONT]: 999,
+};
+
+export const FONT_FAMILY_FALLBACKS = {
+  [CJK_HAND_DRAWN_FALLBACK_FONT]: 100,
+  ...FONT_FAMILY_GENERIC_FALLBACKS,
+  [WINDOWS_EMOJI_FALLBACK_FONT]: 1000,
+};
+
+export function getGenericFontFamilyFallback(
+  fontFamily: number,
+): keyof typeof FONT_FAMILY_GENERIC_FALLBACKS {
+  switch (fontFamily) {
+    case FONT_FAMILY.Cascadia:
+    case FONT_FAMILY["Comic Shanns"]:
+      return MONOSPACE_GENERIC_FONT;
+
+    default:
+      return SANS_SERIF_GENERIC_FONT;
+  }
+}
+
+export const getFontFamilyFallbacks = (
+  fontFamily: number,
+): Array<keyof typeof FONT_FAMILY_FALLBACKS> => {
+  const genericFallbackFont = getGenericFontFamilyFallback(fontFamily);
+
+  switch (fontFamily) {
+    case FONT_FAMILY.Excalifont:
+      return [
+        CJK_HAND_DRAWN_FALLBACK_FONT,
+        genericFallbackFont,
+        WINDOWS_EMOJI_FALLBACK_FONT,
+      ];
+    default:
+      return [genericFallbackFont, WINDOWS_EMOJI_FALLBACK_FONT];
+  }
+};
+
+export const THEME = {
+  LIGHT: "light",
+  DARK: "dark",
+} as const;
+
+export const DARK_THEME_FILTER = "invert(93%) hue-rotate(180deg)";
+
+export const FRAME_STYLE = {
+  strokeColor: "#bbb" as ExcalidrawElement["strokeColor"],
+  strokeWidth: 2 as ExcalidrawElement["strokeWidth"],
+  strokeStyle: "solid" as ExcalidrawElement["strokeStyle"],
+  fillStyle: "solid" as ExcalidrawElement["fillStyle"],
+  roughness: 0 as ExcalidrawElement["roughness"],
+  roundness: null as ExcalidrawElement["roundness"],
+  backgroundColor: "transparent" as ExcalidrawElement["backgroundColor"],
+  radius: 8,
+  nameOffsetY: 3,
+  nameColorLightTheme: "#999999",
+  nameColorDarkTheme: "#7a7a7a",
+  nameFontSize: 14,
+  nameLineHeight: 1.25,
+};
+
+export const MIN_FONT_SIZE = 1;
+export const DEFAULT_FONT_SIZE = 20;
+export const DEFAULT_FONT_FAMILY: FontFamilyValues = FONT_FAMILY.Excalifont;
+export const DEFAULT_TEXT_ALIGN = "left";
+export const DEFAULT_VERTICAL_ALIGN = "top";
+export const DEFAULT_VERSION = "{version}";
+export const DEFAULT_TRANSFORM_HANDLE_SPACING = 2;
+
+export const SIDE_RESIZING_THRESHOLD = 2 * DEFAULT_TRANSFORM_HANDLE_SPACING;
+// a small epsilon to make side resizing always take precedence
+// (avoids an increase in renders and changes to tests)
+export const EPSILON = 0.00001;
+export const DEFAULT_COLLISION_THRESHOLD =
+  2 * SIDE_RESIZING_THRESHOLD - EPSILON;
+
+export const COLOR_WHITE = "#ffffff";
+export const COLOR_CHARCOAL_BLACK = "#1e1e1e";
+// keep this in sync with CSS
+export const COLOR_VOICE_CALL = "#a2f1a6";
+
+export const CANVAS_ONLY_ACTIONS = ["selectAll"];
+
+export const DEFAULT_GRID_SIZE = 20;
+export const DEFAULT_GRID_STEP = 5;
+
+export const IMAGE_MIME_TYPES = {
+  svg: "image/svg+xml",
+  png: "image/png",
+  jpg: "image/jpeg",
+  gif: "image/gif",
+  webp: "image/webp",
+  bmp: "image/bmp",
+  ico: "image/x-icon",
+  avif: "image/avif",
+  jfif: "image/jfif",
+} as const;
+
+export const STRING_MIME_TYPES = {
+  text: "text/plain",
+  html: "text/html",
+  json: "application/json",
+  // excalidraw data
+  excalidraw: "application/vnd.excalidraw+json",
+  excalidrawClipboard: "application/vnd.excalidraw.clipboard+json",
+  // LEGACY: fully-qualified library JSON data
+  excalidrawlib: "application/vnd.excalidrawlib+json",
+  // list of excalidraw library item ids
+  excalidrawlibIds: "application/vnd.excalidrawlib.ids+json",
+} as const;
+
+export const MIME_TYPES = {
+  ...STRING_MIME_TYPES,
+  // image-encoded excalidraw data
+  "excalidraw.svg": "image/svg+xml",
+  "excalidraw.png": "image/png",
+  // binary
+  binary: "application/octet-stream",
+  // image
+  ...IMAGE_MIME_TYPES,
+} as const;
+
+export const ALLOWED_PASTE_MIME_TYPES = [
+  MIME_TYPES.text,
+  MIME_TYPES.html,
+  ...Object.values(IMAGE_MIME_TYPES),
+] as const;
+
+export const EXPORT_IMAGE_TYPES = {
+  png: "png",
+  svg: "svg",
+  clipboard: "clipboard",
+} as const;
+
+export const EXPORT_DATA_TYPES = {
+  excalidraw: "excalidraw",
+  excalidrawClipboard: "excalidraw/clipboard",
+  excalidrawLibrary: "excalidrawlib",
+  excalidrawClipboardWithAPI: "excalidraw-api/clipboard",
+} as const;
+
+export const getExportSource = () =>
+  window.EXCALIDRAW_EXPORT_SOURCE || window.location.origin;
+
+// time in milliseconds
+export const IMAGE_RENDER_TIMEOUT = 500;
+export const TAP_TWICE_TIMEOUT = 300;
+export const TOUCH_CTX_MENU_TIMEOUT = 500;
+export const TITLE_TIMEOUT = 10000;
+export const VERSION_TIMEOUT = 30000;
+export const SCROLL_TIMEOUT = 100;
+export const ZOOM_STEP = 0.1;
+export const MIN_ZOOM = 0.1;
+export const MAX_ZOOM = 30;
+export const HYPERLINK_TOOLTIP_DELAY = 300;
+
+// Report a user inactive after IDLE_THRESHOLD milliseconds
+export const IDLE_THRESHOLD = 60_000;
+// Report a user active each ACTIVE_THRESHOLD milliseconds
+export const ACTIVE_THRESHOLD = 3_000;
+
+export const URL_QUERY_KEYS = {
+  addLibrary: "addLibrary",
+} as const;
+
+export const URL_HASH_KEYS = {
+  addLibrary: "addLibrary",
+} as const;
+
+export const DEFAULT_UI_OPTIONS: AppProps["UIOptions"] = {
+  canvasActions: {
+    changeViewBackgroundColor: true,
+    clearCanvas: true,
+    export: { saveFileToDisk: true },
+    loadScene: true,
+    saveToActiveFile: true,
+    toggleTheme: null,
+    saveAsImage: true,
+  },
+  tools: {
+    image: true,
+  },
+};
+
+export const MAX_DECIMALS_FOR_SVG_EXPORT = 2;
+
+export const EXPORT_SCALES = [1, 2, 3];
+export const DEFAULT_EXPORT_PADDING = 10; // px
+
+export const DEFAULT_IMAGE_OPTIONS: AppProps["imageOptions"] = {
+  maxWidthOrHeight: 1440,
+  maxFileSizeBytes: 4 * 1024 * 1024,
+};
+
+export const SVG_NS = "http://www.w3.org/2000/svg";
+export const SVG_DOCUMENT_PREAMBLE = `<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+`;
+
+export const ENCRYPTION_KEY_BITS = 128;
+
+export const VERSIONS = {
+  excalidraw: 2,
+  excalidrawLibrary: 2,
+} as const;
+
+export const BOUND_TEXT_PADDING = 5;
+export const ARROW_LABEL_WIDTH_FRACTION = 0.7;
+export const ARROW_LABEL_FONT_SIZE_TO_MIN_WIDTH_RATIO = 11;
+
+export const VERTICAL_ALIGN = {
+  TOP: "top",
+  MIDDLE: "middle",
+  BOTTOM: "bottom",
+};
+
+export const TEXT_ALIGN = {
+  LEFT: "left",
+  CENTER: "center",
+  RIGHT: "right",
+};
+
+export const ELEMENT_READY_TO_ERASE_OPACITY = 20;
+
+// Radius represented as 25% of element's largest side (width/height).
+// Used for LEGACY and PROPORTIONAL_RADIUS algorithms, or when the element is
+// below the cutoff size.
+export const DEFAULT_PROPORTIONAL_RADIUS = 0.25;
+// Fixed radius for the ADAPTIVE_RADIUS algorithm. In pixels.
+export const DEFAULT_ADAPTIVE_RADIUS = 32;
+// roundness type (algorithm)
+export const ROUNDNESS = {
+  // Used for legacy rounding (rectangles), which currently works the same
+  // as PROPORTIONAL_RADIUS, but we need to differentiate for UI purposes and
+  // forwards-compat.
+  LEGACY: 1,
+
+  // Used for linear elements & diamonds
+  PROPORTIONAL_RADIUS: 2,
+
+  // Current default algorithm for rectangles, using fixed pixel radius.
+  // It's working similarly to a regular border-radius, but attemps to make
+  // radius visually similar across differnt element sizes, especially
+  // very large and very small elements.
+  //
+  // NOTE right now we don't allow configuration and use a constant radius
+  // (see DEFAULT_ADAPTIVE_RADIUS constant)
+  ADAPTIVE_RADIUS: 3,
+} as const;
+
+export const ROUGHNESS = {
+  architect: 0,
+  artist: 1,
+  cartoonist: 2,
+} as const;
+
+export type StrokeWidthKey = "thin" | "medium" | "bold";
+
+export const STROKE_WIDTH_KEYS: readonly StrokeWidthKey[] = [
+  "thin",
+  "medium",
+  "bold",
+];
+
+export const STROKE_WIDTH: Readonly<
+  Record<StrokeWidthKey | "extraBold", ExcalidrawElement["strokeWidth"]>
+> = {
+  thin: 1,
+  medium: 2,
+  bold: 4,
+  extraBold: 8, // unused (may be introduced in the future)
+};
+
+// freedraw schema 2.0 uses thinner stroke, but to maintain backwards and
+// forwards compatibility, instead of changing the shape renderer, we scale
+// the stroke width by 1/2 (previous, thin was 1, medium 2 etc.)
+//
+// note that in the UI, STROKE_WIDTH.thin == FREEDRAW_STROKE_WIDTH.thin still
+export const FREEDRAW_STROKE_WIDTH: Readonly<
+  Record<StrokeWidthKey | "extraBold", ExcalidrawElement["strokeWidth"]>
+> = {
+  thin: 0.5,
+  medium: 1,
+  bold: 2,
+  extraBold: 4, // legacy (may be used again in the future)
+};
+
+export const getStrokeWidthByKey = (
+  elementType: ExcalidrawElement["type"],
+  strokeWidthKey: StrokeWidthKey,
+): ExcalidrawElement["strokeWidth"] => {
+  return elementType === "freedraw"
+    ? FREEDRAW_STROKE_WIDTH[strokeWidthKey]
+    : STROKE_WIDTH[strokeWidthKey];
+};
+
+export const DEFAULT_ELEMENT_STROKE_WIDTH_KEY: StrokeWidthKey = "medium";
+
+export const DEFAULT_ELEMENT_PROPS: {
+  strokeColor: ExcalidrawElement["strokeColor"];
+  backgroundColor: ExcalidrawElement["backgroundColor"];
+  fillStyle: ExcalidrawElement["fillStyle"];
+  strokeWidth: ExcalidrawElement["strokeWidth"];
+  strokeStyle: ExcalidrawElement["strokeStyle"];
+  roughness: ExcalidrawElement["roughness"];
+  opacity: ExcalidrawElement["opacity"];
+  locked: ExcalidrawElement["locked"];
+} = {
+  strokeColor: COLOR_PALETTE.black,
+  backgroundColor: COLOR_PALETTE.transparent,
+  fillStyle: "solid",
+  strokeWidth: STROKE_WIDTH[DEFAULT_ELEMENT_STROKE_WIDTH_KEY],
+  strokeStyle: "solid",
+  roughness: ROUGHNESS.artist,
+  opacity: 100,
+  locked: false,
+};
+
+export const LIBRARY_SIDEBAR_TAB = "library";
+export const CANVAS_SEARCH_TAB = "search";
+
+export const DEFAULT_SIDEBAR = {
+  name: "default",
+  defaultTab: LIBRARY_SIDEBAR_TAB,
+} as const;
+
+export const LIBRARY_DISABLED_TYPES = new Set([
+  "iframe",
+  "embeddable",
+  "image",
+] as const);
+
+// use these constants to easily identify reference sites
+export const TOOL_TYPE = {
+  selection: "selection",
+  lasso: "lasso",
+  rectangle: "rectangle",
+  diamond: "diamond",
+  ellipse: "ellipse",
+  arrow: "arrow",
+  line: "line",
+  freedraw: "freedraw",
+  text: "text",
+  image: "image",
+  eraser: "eraser",
+  hand: "hand",
+  frame: "frame",
+  magicframe: "magicframe",
+  embeddable: "embeddable",
+  laser: "laser",
+} as const;
+
+export const EDITOR_LS_KEYS = {
+  OAI_API_KEY: "excalidraw-oai-api-key",
+  // legacy naming (non)scheme
+  MERMAID_TO_EXCALIDRAW: "mermaid-to-excalidraw",
+  PUBLISH_LIBRARY: "publish-library-data",
+} as const;
+
+/**
+ * not translated as this is used only in public, stateless API as default value
+ * where filename is optional and we can't retrieve name from app state
+ */
+export const DEFAULT_FILENAME = "Untitled";
+
+export const STATS_PANELS = { generalStats: 1, elementProperties: 2 } as const;
+
+export const MIN_WIDTH_OR_HEIGHT = 1;
+
+export const ARROW_TYPE: { [T in AppState["currentItemArrowType"]]: T } = {
+  sharp: "sharp",
+  round: "round",
+  elbow: "elbow",
+};
+
+export const DEFAULT_REDUCED_GLOBAL_ALPHA = 0.3;
+export const ELEMENT_LINK_KEY = "element";
+
+/** used in tests */
+export const ORIG_ID = Symbol.for("__test__originalId__");
+
+export enum UserIdleState {
+  ACTIVE = "active",
+  AWAY = "away",
+  IDLE = "idle",
+}
+
+/**
+ * distance at which we merge points instead of adding a new merge-point
+ * when converting a line to a polygon (merge currently means overlaping
+ * the start and end points)
+ */
+export const LINE_POLYGON_POINT_MERGE_DISTANCE = 20;
+
+export const DOUBLE_TAP_POSITION_THRESHOLD = 35;
+
+export const BIND_MODE_TIMEOUT = 700; // ms
+
+// glass background for mobile action buttons
+export const MOBILE_ACTION_BUTTON_BG = {
+  background: "var(--mobile-action-button-bg)",
+} as const;
+
+export const DEFAULT_STROKE_STREAMLINE = 0.5;
+export const DEFAULT_STROKE_STREAMLINE_PRECISE = 0.2;