feat: Support subtypes for ExcalidrawTextElement

Co-authored-by: dwelle <luzar.david@gmail.com>

README.md

@@ -70,7 +70,7 @@ The Excalidraw editor (npm package) supports:
 
 ## Excalidraw.com
 
-The app hosted at [excalidraw.com](https://excalidraw.com) is a minimal showcase of what you can build with Excalidraw. Its [source code](https://github.com/excalidraw/excalidraw/tree/master/src/excalidraw-app) is part of this repository as well, and the app features:
+The app hosted at [excalidraw.com](https://excalidraw.com) is a minimal showcase of what you can build with Excalidraw. Its [source code](https://github.com/excalidraw/excalidraw/tree/master/excalidraw-app) is part of this repository as well, and the app features:
 
 - 📡 PWA support (works offline).
 - 🤼 Real-time collaboration.

dev-docs/docs/@excalidraw/excalidraw/api/children-components/main-menu.mdx

@@ -38,6 +38,7 @@ To render an item, its recommended to use `MainMenu.Item`.
 | Prop | Type | Required | Default | Description |
 | --- | --- | :-: | :-: | --- |
 | `onSelect` | `function` | Yes | - | Triggered when selected (via mouse). Calling `event.preventDefault()` will stop menu from closing. |
+| `selected` | `boolean` | No | `false` | Whether item is active |
 | `children` | `React.ReactNode` | Yes | - | The content of the menu item |
 | `icon` | `JSX.Element` | No | - | The icon used in the menu item |
 | `shortcut` | `string` | No | - | The shortcut to be shown for the menu item |
@@ -70,6 +71,7 @@ function App() {
 | Prop | Type | Required | Default | Description |
 | --- | --- | :-: | :-: | --- |
 | `onSelect` | `function` | No | - | Triggered when selected (via mouse). Calling `event.preventDefault()` will stop menu from closing. |
+| `selected` | `boolean` | No | `false` | Whether item is active |
 | `href` | `string` | Yes | - | The `href` attribute to be added to the `anchor` element. |
 | `children` | `React.ReactNode` | Yes | - | The content of the menu item |
 | `icon` | `JSX.Element` | No | - | The icon used in the menu item |

dev-docs/docs/@excalidraw/excalidraw/customizing-styles.mdx

@@ -1,6 +1,6 @@
 # Customizing Styles
 
-Excalidraw is using CSS variables to style certain components. To override them, you should set your own on the `.excalidraw` and `.excalidraw.theme--dark` (for dark mode variables) selectors.
+Excalidraw uses CSS variables to style certain components. To override them, you should set your own on the `.excalidraw` and `.excalidraw.theme--dark` (for dark mode variables) selectors.
 
 Make sure the selector has higher specificity, e.g. by prefixing it with your app's selector:
 

dev-docs/docs/@excalidraw/excalidraw/faq.mdx

@@ -2,7 +2,7 @@
 
 ### Does this package support collaboration ?
 
-No, Excalidraw package doesn't come with collaboration built in, since the implementation is specific to each host app. We expose APIs which you can use to communicate with Excalidraw which you can use to implement it. You can check our own implementation [here](https://github.com/excalidraw/excalidraw/blob/master/src/excalidraw-app/index.tsx). Here is a [detailed answer](https://github.com/excalidraw/excalidraw/discussions/3879#discussioncomment-1110524) on how you can achieve the same.
+No, Excalidraw package doesn't come with collaboration built in, since the implementation is specific to each host app. We expose APIs which you can use to communicate with Excalidraw which you can use to implement it. You can check our own implementation [here](https://github.com/excalidraw/excalidraw/blob/master/excalidraw-app/index.tsx). Here is a [detailed answer](https://github.com/excalidraw/excalidraw/discussions/3879#discussioncomment-1110524) on how you can achieve the same.
 
 ### Turning off Aggressive Anti-Fingerprinting in Brave browser
 
@@ -18,7 +18,7 @@ We strongly recommend turning it off. You can follow the steps below on how to d
 
 2. Once opened, look for **Aggressively Block Fingerprinting**
 
-![Aggresive block fingerprinting](../../assets/aggressive-block-fingerprint.png)
+![Aggressive block fingerprinting](../../assets/aggressive-block-fingerprint.png)
 
 3. Switch to **Block Fingerprinting**
 

dev-docs/docs/@excalidraw/excalidraw/integration.mdx

@@ -34,7 +34,7 @@ function App() {
 
 Since _Excalidraw_ doesn't support server side rendering, you should render the component once the host is `mounted`.
 
-The following worfklow shows one way how to render Excalidraw on Next.js. We'll add more detailed and alternative Next.js examples, soon.
+The following workflow shows one way how to render Excalidraw on Next.js. We'll add more detailed and alternative Next.js examples, soon.
 
 ```jsx showLineNumbers
 import { useState, useEffect } from "react";

dev-docs/docs/codebase/frames.mdx

@@ -0,0 +1,22 @@
+# Frames
+
+## Ordering
+
+Frames should be ordered where frame children come first, followed by the frame element itself:
+
+```
+[
+  other_element,
+  frame1_child1,
+  frame1_child2,
+  frame1,
+  other_element,
+  frame2_child1,
+  frame2_child2,
+  frame2,
+  other_element,
+  ...
+]
+```
+
+If not oredered correctly, the editor will still function, but the elements may not be rendered and clipped correctly. Further, the renderer relies on this ordering for performance optimizations.

dev-docs/docs/introduction/contributing.mdx

@@ -15,7 +15,7 @@ In case you want to pick up something from the roadmap, comment on that issue an
 1. Run `yarn` to install dependencies
 1. Create a branch for your PR with `git checkout -b your-branch-name`
 
-> To keep `master` branch pointing to remote repository and make pull requests from branches on your fork. To do this, run:
+> To keep `master` branch pointing to remote repository and make pull requests from branches on your fork, run:
 >
 > ```bash
 > git remote add upstream https://github.com/excalidraw/excalidraw.git

dev-docs/sidebars.js

@@ -23,7 +23,11 @@ const sidebars = {
       },
       items: ["introduction/development", "introduction/contributing"],
     },
-    { type: "category", label: "Codebase", items: ["codebase/json-schema"] },
+    {
+      type: "category",
+      label: "Codebase",
+      items: ["codebase/json-schema", "codebase/frames"],
+    },
     {
       type: "category",
       label: "@excalidraw/excalidraw",

dev-docs/src/components/Homepage/index.js

@@ -15,7 +15,7 @@ const FeatureList = [
     Svg: require("@site/static/img/undraw_blank_canvas.svg").default,
     description: (
       <>
-        Want to build your own app powered by Excalidraw by don't know where to
+        Want to build your own app powered by Excalidraw but don't know where to
         start?
       </>
     ),

excalidraw-app/CustomStats.tsx

@@ -1,14 +1,14 @@
 import { useEffect, useState } from "react";
-import { debounce, getVersion, nFormatter } from "../utils";
+import { debounce, getVersion, nFormatter } from "../src/utils";
 import {
   getElementsStorageSize,
   getTotalStorageSize,
 } from "./data/localStorage";
-import { DEFAULT_VERSION } from "../constants";
-import { t } from "../i18n";
-import { copyTextToSystemClipboard } from "../clipboard";
-import { NonDeletedExcalidrawElement } from "../element/types";
-import { UIAppState } from "../types";
+import { DEFAULT_VERSION } from "../src/constants";
+import { t } from "../src/i18n";
+import { copyTextToSystemClipboard } from "../src/clipboard";
+import { NonDeletedExcalidrawElement } from "../src/element/types";
+import { UIAppState } from "../src/types";
 
 type StorageSizes = { scene: number; total: number };
 

excalidraw-app/collab/Collab.tsx

@@ -1,23 +1,23 @@
 import throttle from "lodash.throttle";
 import { PureComponent } from "react";
-import { ExcalidrawImperativeAPI } from "../../types";
-import { ErrorDialog } from "../../components/ErrorDialog";
-import { APP_NAME, ENV, EVENT } from "../../constants";
-import { ImportedDataState } from "../../data/types";
+import { ExcalidrawImperativeAPI } from "../../src/types";
+import { ErrorDialog } from "../../src/components/ErrorDialog";
+import { APP_NAME, ENV, EVENT } from "../../src/constants";
+import { ImportedDataState } from "../../src/data/types";
 import {
   ExcalidrawElement,
   InitializedExcalidrawImageElement,
-} from "../../element/types";
+} from "../../src/element/types";
 import {
   getSceneVersion,
   restoreElements,
-} from "../../packages/excalidraw/index";
-import { Collaborator, Gesture } from "../../types";
+} from "../../src/packages/excalidraw/index";
+import { Collaborator, Gesture } from "../../src/types";
 import {
   preventUnload,
   resolvablePromise,
   withBatchedUpdates,
-} from "../../utils";
+} from "../../src/utils";
 import {
   CURSOR_SYNC_TIMEOUT,
   FILE_UPLOAD_MAX_BYTES,
@@ -48,25 +48,25 @@ import {
 } from "../data/localStorage";
 import Portal from "./Portal";
 import RoomDialog from "./RoomDialog";
-import { t } from "../../i18n";
-import { UserIdleState } from "../../types";
-import { IDLE_THRESHOLD, ACTIVE_THRESHOLD } from "../../constants";
+import { t } from "../../src/i18n";
+import { UserIdleState } from "../../src/types";
+import { IDLE_THRESHOLD, ACTIVE_THRESHOLD } from "../../src/constants";
 import {
   encodeFilesForUpload,
   FileManager,
   updateStaleImageStatuses,
 } from "../data/FileManager";
-import { AbortError } from "../../errors";
+import { AbortError } from "../../src/errors";
 import {
   isImageElement,
   isInitializedImageElement,
-} from "../../element/typeChecks";
-import { newElementWith } from "../../element/mutateElement";
+} from "../../src/element/typeChecks";
+import { newElementWith } from "../../src/element/mutateElement";
 import {
   ReconciledElements,
   reconcileElements as _reconcileElements,
 } from "./reconciliation";
-import { decryptData } from "../../data/encryption";
+import { decryptData } from "../../src/data/encryption";
 import { resetBrowserStateVersions } from "../data/tabSync";
 import { LocalData } from "../data/LocalData";
 import { atom, useAtom } from "jotai";

excalidraw-app/collab/Portal.tsx

@@ -6,19 +6,19 @@ import {
 
 import { TCollabClass } from "./Collab";
 
-import { ExcalidrawElement } from "../../element/types";
+import { ExcalidrawElement } from "../../src/element/types";
 import {
   WS_EVENTS,
   FILE_UPLOAD_TIMEOUT,
   WS_SCENE_EVENT_TYPES,
 } from "../app_constants";
-import { UserIdleState } from "../../types";
-import { trackEvent } from "../../analytics";
+import { UserIdleState } from "../../src/types";
+import { trackEvent } from "../../src/analytics";
 import throttle from "lodash.throttle";
-import { newElementWith } from "../../element/mutateElement";
+import { newElementWith } from "../../src/element/mutateElement";
 import { BroadcastedExcalidrawElement } from "./reconciliation";
-import { encryptData } from "../../data/encryption";
-import { PRECEDING_ELEMENT_KEY } from "../../constants";
+import { encryptData } from "../../src/data/encryption";
+import { PRECEDING_ELEMENT_KEY } from "../../src/constants";
 
 class Portal {
   collab: TCollabClass;

excalidraw-app/collab/RoomDialog.scss

@@ -1,4 +1,4 @@
-@import "../../css/variables.module";
+@import "../../src/css/variables.module";
 
 .excalidraw {
   .RoomDialog {

excalidraw-app/collab/RoomDialog.tsx

@@ -1,13 +1,13 @@
 import { useRef, useState } from "react";
 import * as Popover from "@radix-ui/react-popover";
 
-import { copyTextToSystemClipboard } from "../../clipboard";
-import { trackEvent } from "../../analytics";
-import { getFrame } from "../../utils";
-import { useI18n } from "../../i18n";
-import { KEYS } from "../../keys";
+import { copyTextToSystemClipboard } from "../../src/clipboard";
+import { trackEvent } from "../../src/analytics";
+import { getFrame } from "../../src/utils";
+import { useI18n } from "../../src/i18n";
+import { KEYS } from "../../src/keys";
 
-import { Dialog } from "../../components/Dialog";
+import { Dialog } from "../../src/components/Dialog";
 import {
   copyIcon,
   playerPlayIcon,
@@ -16,11 +16,11 @@ import {
   shareIOS,
   shareWindows,
   tablerCheckIcon,
-} from "../../components/icons";
-import { TextField } from "../../components/TextField";
-import { FilledButton } from "../../components/FilledButton";
+} from "../../src/components/icons";
+import { TextField } from "../../src/components/TextField";
+import { FilledButton } from "../../src/components/FilledButton";
 
-import { ReactComponent as CollabImage } from "../../assets/lock.svg";
+import { ReactComponent as CollabImage } from "../../src/assets/lock.svg";
 import "./RoomDialog.scss";
 
 const getShareIcon = () => {

excalidraw-app/collab/reconciliation.ts

@@ -1,7 +1,7 @@
-import { PRECEDING_ELEMENT_KEY } from "../../constants";
-import { ExcalidrawElement } from "../../element/types";
-import { AppState } from "../../types";
-import { arrayToMapWithIndex } from "../../utils";
+import { PRECEDING_ELEMENT_KEY } from "../../src/constants";
+import { ExcalidrawElement } from "../../src/element/types";
+import { AppState } from "../../src/types";
+import { arrayToMapWithIndex } from "../../src/utils";
 
 export type ReconciledElements = readonly ExcalidrawElement[] & {
   _brand: "reconciledElements";

excalidraw-app/components/AppFooter.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { Footer } from "../../packages/excalidraw/index";
+import { Footer } from "../../src/packages/excalidraw/index";
 import { EncryptedIcon } from "./EncryptedIcon";
 import { ExcalidrawPlusAppLink } from "./ExcalidrawPlusAppLink";
 import { isExcalidrawPlusSignedUser } from "../app_constants";

excalidraw-app/components/AppMainMenu.tsx

@@ -1,6 +1,6 @@
 import React from "react";
-import { PlusPromoIcon } from "../../components/icons";
-import { MainMenu } from "../../packages/excalidraw/index";
+import { PlusPromoIcon } from "../../src/components/icons";
+import { MainMenu } from "../../src/packages/excalidraw/index";
 import { LanguageList } from "./LanguageList";
 
 export const AppMainMenu: React.FC<{

excalidraw-app/components/AppWelcomeScreen.tsx

@@ -1,9 +1,9 @@
 import React from "react";
-import { PlusPromoIcon } from "../../components/icons";
-import { useI18n } from "../../i18n";
-import { WelcomeScreen } from "../../packages/excalidraw/index";
+import { PlusPromoIcon } from "../../src/components/icons";
+import { useI18n } from "../../src/i18n";
+import { WelcomeScreen } from "../../src/packages/excalidraw/index";
 import { isExcalidrawPlusSignedUser } from "../app_constants";
-import { POINTER_EVENTS } from "../../constants";
+import { POINTER_EVENTS } from "../../src/constants";
 
 export const AppWelcomeScreen: React.FC<{
   setCollabDialogShown: (toggle: boolean) => any;

excalidraw-app/components/EncryptedIcon.tsx

@@ -1,6 +1,6 @@
-import { shield } from "../../components/icons";
-import { Tooltip } from "../../components/Tooltip";
-import { useI18n } from "../../i18n";
+import { shield } from "../../src/components/icons";
+import { Tooltip } from "../../src/components/Tooltip";
+import { useI18n } from "../../src/i18n";
 
 export const EncryptedIcon = () => {
   const { t } = useI18n();

excalidraw-app/components/ExportToExcalidrawPlus.tsx

@@ -1,20 +1,20 @@
 import React from "react";
-import { Card } from "../../components/Card";
-import { ToolButton } from "../../components/ToolButton";
-import { serializeAsJSON } from "../../data/json";
+import { Card } from "../../src/components/Card";
+import { ToolButton } from "../../src/components/ToolButton";
+import { serializeAsJSON } from "../../src/data/json";
 import { loadFirebaseStorage, saveFilesToFirebase } from "../data/firebase";
-import { FileId, NonDeletedExcalidrawElement } from "../../element/types";
-import { AppState, BinaryFileData, BinaryFiles } from "../../types";
+import { FileId, NonDeletedExcalidrawElement } from "../../src/element/types";
+import { AppState, BinaryFileData, BinaryFiles } from "../../src/types";
 import { nanoid } from "nanoid";
-import { useI18n } from "../../i18n";
-import { encryptData, generateEncryptionKey } from "../../data/encryption";
-import { isInitializedImageElement } from "../../element/typeChecks";
+import { useI18n } from "../../src/i18n";
+import { encryptData, generateEncryptionKey } from "../../src/data/encryption";
+import { isInitializedImageElement } from "../../src/element/typeChecks";
 import { FILE_UPLOAD_MAX_BYTES } from "../app_constants";
 import { encodeFilesForUpload } from "../data/FileManager";
-import { MIME_TYPES } from "../../constants";
-import { trackEvent } from "../../analytics";
-import { getFrame } from "../../utils";
-import { ExcalidrawLogo } from "../../components/ExcalidrawLogo";
+import { MIME_TYPES } from "../../src/constants";
+import { trackEvent } from "../../src/analytics";
+import { getFrame } from "../../src/utils";
+import { ExcalidrawLogo } from "../../src/components/ExcalidrawLogo";
 
 export const exportToExcalidrawPlus = async (
   elements: readonly NonDeletedExcalidrawElement[],

excalidraw-app/components/GitHubCorner.tsx

@@ -1,7 +1,7 @@
 import oc from "open-color";
 import React from "react";
-import { THEME } from "../../constants";
-import { Theme } from "../../element/types";
+import { THEME } from "../../src/constants";
+import { Theme } from "../../src/element/types";
 
 // https://github.com/tholman/github-corners
 export const GitHubCorner = React.memo(

excalidraw-app/components/LanguageList.tsx

@@ -1,8 +1,8 @@
 import { useSetAtom } from "jotai";
 import React from "react";
 import { appLangCodeAtom } from "..";
-import { useI18n } from "../../i18n";
-import { languages } from "../../i18n";
+import { useI18n } from "../../src/i18n";
+import { languages } from "../../src/i18n";
 
 export const LanguageList = ({ style }: { style?: React.CSSProperties }) => {
   const { t, langCode } = useI18n();

excalidraw-app/data/FileManager.ts

@@ -1,19 +1,19 @@
-import { compressData } from "../../data/encode";
-import { newElementWith } from "../../element/mutateElement";
-import { isInitializedImageElement } from "../../element/typeChecks";
+import { compressData } from "../../src/data/encode";
+import { newElementWith } from "../../src/element/mutateElement";
+import { isInitializedImageElement } from "../../src/element/typeChecks";
 import {
   ExcalidrawElement,
   ExcalidrawImageElement,
   FileId,
   InitializedExcalidrawImageElement,
-} from "../../element/types";
-import { t } from "../../i18n";
+} from "../../src/element/types";
+import { t } from "../../src/i18n";
 import {
   BinaryFileData,
   BinaryFileMetadata,
   ExcalidrawImperativeAPI,
   BinaryFiles,
-} from "../../types";
+} from "../../src/types";
 
 export class FileManager {
   /** files being fetched */

excalidraw-app/data/LocalData.ts

@@ -11,11 +11,11 @@
  */
 
 import { createStore, entries, del, getMany, set, setMany } from "idb-keyval";
-import { clearAppStateForLocalStorage } from "../../appState";
-import { clearElementsForLocalStorage } from "../../element";
-import { ExcalidrawElement, FileId } from "../../element/types";
-import { AppState, BinaryFileData, BinaryFiles } from "../../types";
-import { debounce } from "../../utils";
+import { clearAppStateForLocalStorage } from "../../src/appState";
+import { clearElementsForLocalStorage } from "../../src/element";
+import { ExcalidrawElement, FileId } from "../../src/element/types";
+import { AppState, BinaryFileData, BinaryFiles } from "../../src/types";
+import { debounce } from "../../src/utils";
 import { SAVE_TO_LOCAL_STORAGE_TIMEOUT, STORAGE_KEYS } from "../app_constants";
 import { FileManager } from "./FileManager";
 import { Locker } from "./Locker";

excalidraw-app/data/firebase.ts

@@ -1,20 +1,20 @@
-import { ExcalidrawElement, FileId } from "../../element/types";
-import { getSceneVersion } from "../../element";
+import { ExcalidrawElement, FileId } from "../../src/element/types";
+import { getSceneVersion } from "../../src/element";
 import Portal from "../collab/Portal";
-import { restoreElements } from "../../data/restore";
+import { restoreElements } from "../../src/data/restore";
 import {
   AppState,
   BinaryFileData,
   BinaryFileMetadata,
   DataURL,
-} from "../../types";
+} from "../../src/types";
 import { FILE_CACHE_MAX_AGE_SEC } from "../app_constants";
-import { decompressData } from "../../data/encode";
-import { encryptData, decryptData } from "../../data/encryption";
-import { MIME_TYPES } from "../../constants";
+import { decompressData } from "../../src/data/encode";
+import { encryptData, decryptData } from "../../src/data/encryption";
+import { MIME_TYPES } from "../../src/constants";
 import { reconcileElements } from "../collab/reconciliation";
 import { getSyncableElements, SyncableExcalidrawElement } from ".";
-import { ResolutionType } from "../../utility-types";
+import { ResolutionType } from "../../src/utility-types";
 
 // private
 // -----------------------------------------------------------------------------

excalidraw-app/data/index.ts

@@ -1,23 +1,23 @@
-import { compressData, decompressData } from "../../data/encode";
+import { compressData, decompressData } from "../../src/data/encode";
 import {
   decryptData,
   generateEncryptionKey,
   IV_LENGTH_BYTES,
-} from "../../data/encryption";
-import { serializeAsJSON } from "../../data/json";
-import { restore } from "../../data/restore";
-import { ImportedDataState } from "../../data/types";
-import { isInvisiblySmallElement } from "../../element/sizeHelpers";
-import { isInitializedImageElement } from "../../element/typeChecks";
-import { ExcalidrawElement, FileId } from "../../element/types";
-import { t } from "../../i18n";
+} from "../../src/data/encryption";
+import { serializeAsJSON } from "../../src/data/json";
+import { restore } from "../../src/data/restore";
+import { ImportedDataState } from "../../src/data/types";
+import { isInvisiblySmallElement } from "../../src/element/sizeHelpers";
+import { isInitializedImageElement } from "../../src/element/typeChecks";
+import { ExcalidrawElement, FileId } from "../../src/element/types";
+import { t } from "../../src/i18n";
 import {
   AppState,
   BinaryFileData,
   BinaryFiles,
   UserIdleState,
-} from "../../types";
-import { bytesToHexString } from "../../utils";
+} from "../../src/types";
+import { bytesToHexString } from "../../src/utils";
 import {
   DELETED_ELEMENT_TIMEOUT,
   FILE_UPLOAD_MAX_BYTES,
@@ -107,7 +107,7 @@ export type SocketUpdateDataSource = {
     type: "MOUSE_LOCATION";
     payload: {
       socketId: string;
-      pointer: { x: number; y: number };
+      pointer: { x: number; y: number; tool: "pointer" | "laser" };
       button: "down" | "up";
       selectedElementIds: AppState["selectedElementIds"];
       username: string;

excalidraw-app/data/localStorage.ts

@@ -1,12 +1,12 @@
-import { ExcalidrawElement } from "../../element/types";
-import { AppState } from "../../types";
+import { ExcalidrawElement } from "../../src/element/types";
+import { AppState } from "../../src/types";
 import {
   clearAppStateForLocalStorage,
   getDefaultAppState,
-} from "../../appState";
-import { clearElementsForLocalStorage } from "../../element";
+} from "../../src/appState";
+import { clearElementsForLocalStorage } from "../../src/element";
 import { STORAGE_KEYS } from "../app_constants";
-import { ImportedDataState } from "../../data/types";
+import { ImportedDataState } from "../../src/data/types";
 
 export const saveUsernameToLocalStorage = (username: string) => {
   try {

excalidraw-app/index.tsx

@@ -1,31 +1,31 @@
-import polyfill from "../polyfill";
+import polyfill from "../src/polyfill";
 import LanguageDetector from "i18next-browser-languagedetector";
 import { useEffect, useRef, useState } from "react";
-import { trackEvent } from "../analytics";
-import { getDefaultAppState } from "../appState";
-import { ErrorDialog } from "../components/ErrorDialog";
-import { TopErrorBoundary } from "../components/TopErrorBoundary";
+import { trackEvent } from "../src/analytics";
+import { getDefaultAppState } from "../src/appState";
+import { ErrorDialog } from "../src/components/ErrorDialog";
+import { TopErrorBoundary } from "../src/components/TopErrorBoundary";
 import {
   APP_NAME,
   EVENT,
   THEME,
   TITLE_TIMEOUT,
   VERSION_TIMEOUT,
-} from "../constants";
-import { loadFromBlob } from "../data/blob";
+} from "../src/constants";
+import { loadFromBlob } from "../src/data/blob";
 import {
   ExcalidrawElement,
   FileId,
   NonDeletedExcalidrawElement,
   Theme,
-} from "../element/types";
-import { useCallbackRefState } from "../hooks/useCallbackRefState";
-import { t } from "../i18n";
+} from "../src/element/types";
+import { useCallbackRefState } from "../src/hooks/useCallbackRefState";
+import { t } from "../src/i18n";
 import {
   Excalidraw,
   defaultLang,
   LiveCollaborationTrigger,
-} from "../packages/excalidraw/index";
+} from "../src/packages/excalidraw/index";
 import {
   AppState,
   LibraryItems,
@@ -33,7 +33,7 @@ import {
   BinaryFiles,
   ExcalidrawInitialDataState,
   UIAppState,
-} from "../types";
+} from "../src/types";
 import {
   debounce,
   getVersion,
@@ -43,7 +43,7 @@ import {
   ResolvablePromise,
   resolvablePromise,
   isRunningInIframe,
-} from "../utils";
+} from "../src/utils";
 import {
   FIREBASE_STORAGE_PREFIXES,
   STORAGE_KEYS,
@@ -68,33 +68,40 @@ import {
   importUsernameFromLocalStorage,
 } from "./data/localStorage";
 import CustomStats from "./CustomStats";
-import { restore, restoreAppState, RestoredDataState } from "../data/restore";
+import {
+  restore,
+  restoreAppState,
+  RestoredDataState,
+} from "../src/data/restore";
 import {
   ExportToExcalidrawPlus,
   exportToExcalidrawPlus,
 } from "./components/ExportToExcalidrawPlus";
 import { updateStaleImageStatuses } from "./data/FileManager";
-import { newElementWith } from "../element/mutateElement";
-import { isInitializedImageElement } from "../element/typeChecks";
+import { newElementWith } from "../src/element/mutateElement";
+import { isInitializedImageElement } from "../src/element/typeChecks";
 import { loadFilesFromFirebase } from "./data/firebase";
 import { LocalData } from "./data/LocalData";
 import { isBrowserStorageStateNewer } from "./data/tabSync";
 import clsx from "clsx";
 import { reconcileElements } from "./collab/reconciliation";
-import { parseLibraryTokensFromUrl, useHandleLibrary } from "../data/library";
+import {
+  parseLibraryTokensFromUrl,
+  useHandleLibrary,
+} from "../src/data/library";
 import { AppMainMenu } from "./components/AppMainMenu";
 import { AppWelcomeScreen } from "./components/AppWelcomeScreen";
 import { AppFooter } from "./components/AppFooter";
 import { atom, Provider, useAtom, useAtomValue } from "jotai";
-import { useAtomWithInitialValue } from "../jotai";
+import { useAtomWithInitialValue } from "../src/jotai";
 import { appJotaiStore } from "./app-jotai";
 
 import "./index.scss";
-import { ResolutionType } from "../utility-types";
-import { ShareableLinkDialog } from "../components/ShareableLinkDialog";
-import { openConfirmModal } from "../components/OverwriteConfirm/OverwriteConfirmState";
-import { OverwriteConfirmDialog } from "../components/OverwriteConfirm/OverwriteConfirm";
-import Trans from "../components/Trans";
+import { ResolutionType } from "../src/utility-types";
+import { ShareableLinkDialog } from "../src/components/ShareableLinkDialog";
+import { openConfirmModal } from "../src/components/OverwriteConfirm/OverwriteConfirmState";
+import { OverwriteConfirmDialog } from "../src/components/OverwriteConfirm/OverwriteConfirm";
+import Trans from "../src/components/Trans";
 
 polyfill();
 

excalidraw-app/tests/LanguageList.test.tsx

@@ -0,0 +1,29 @@
+import { defaultLang } from "../../src/i18n";
+import { UI } from "../../src/tests/helpers/ui";
+import { screen, fireEvent, waitFor, render } from "../../src/tests/test-utils";
+
+import ExcalidrawApp from "../../excalidraw-app";
+
+describe("Test LanguageList", () => {
+  it("rerenders UI on language change", async () => {
+    await render(<ExcalidrawApp />);
+
+    // select rectangle tool to show properties menu
+    UI.clickTool("rectangle");
+    // english lang should display `thin` label
+    expect(screen.queryByTitle(/thin/i)).not.toBeNull();
+    fireEvent.click(document.querySelector(".dropdown-menu-button")!);
+
+    fireEvent.change(document.querySelector(".dropdown-select__language")!, {
+      target: { value: "de-DE" },
+    });
+    // switching to german, `thin` label should no longer exist
+    await waitFor(() => expect(screen.queryByTitle(/thin/i)).toBeNull());
+    // reset language
+    fireEvent.change(document.querySelector(".dropdown-select__language")!, {
+      target: { value: defaultLang.code },
+    });
+    // switching back to English
+    await waitFor(() => expect(screen.queryByTitle(/thin/i)).not.toBeNull());
+  });
+});

excalidraw-app/tests/MobileMenu.test.tsx

@@ -1,11 +1,11 @@
-import ExcalidrawApp from "../excalidraw-app";
+import ExcalidrawApp from "../../excalidraw-app";
 import {
   mockBoundingClientRect,
   render,
   restoreOriginalGetBoundingClientRect,
-} from "./test-utils";
+} from "../../src/tests/test-utils";
 
-import { UI } from "./helpers/ui";
+import { UI } from "../../src/tests/helpers/ui";
 
 describe("Test MobileMenu", () => {
   const { h } = window;

excalidraw-app/tests/collab.test.tsx

@@ -1,8 +1,8 @@
 import { vi } from "vitest";
-import { render, updateSceneData, waitFor } from "./test-utils";
-import ExcalidrawApp from "../excalidraw-app";
-import { API } from "./helpers/api";
-import { createUndoAction } from "../actions/actionHistory";
+import { render, updateSceneData, waitFor } from "../../src/tests/test-utils";
+import ExcalidrawApp from "../../excalidraw-app";
+import { API } from "../../src/tests/helpers/api";
+import { createUndoAction } from "../../src/actions/actionHistory";
 const { h } = window;
 
 Object.defineProperty(window, "crypto", {
@@ -16,7 +16,7 @@ Object.defineProperty(window, "crypto", {
   },
 });
 
-vi.mock("../excalidraw-app/data/index.ts", async (importActual) => {
+vi.mock("../../excalidraw-app/data/index.ts", async (importActual) => {
   const module = (await importActual()) as any;
   return {
     __esmodule: true,
@@ -27,7 +27,7 @@ vi.mock("../excalidraw-app/data/index.ts", async (importActual) => {
   };
 });
 
-vi.mock("../excalidraw-app/data/firebase.ts", () => {
+vi.mock("../../excalidraw-app/data/firebase.ts", () => {
   const loadFromFirebase = async () => null;
   const saveToFirebase = () => {};
   const isSavedToFirebase = () => true;

excalidraw-app/tests/reconciliation.test.ts

@@ -1,13 +1,13 @@
 import { expect } from "chai";
-import { PRECEDING_ELEMENT_KEY } from "../constants";
-import { ExcalidrawElement } from "../element/types";
+import { PRECEDING_ELEMENT_KEY } from "../../src/constants";
+import { ExcalidrawElement } from "../../src/element/types";
 import {
   BroadcastedExcalidrawElement,
   ReconciledElements,
   reconcileElements,
-} from "../excalidraw-app/collab/reconciliation";
-import { randomInteger } from "../random";
-import { AppState } from "../types";
+} from "../../excalidraw-app/collab/reconciliation";
+import { randomInteger } from "../../src/random";
+import { AppState } from "../../src/types";
 
 type Id = string;
 type ElementLike = {

package.json

@@ -20,6 +20,7 @@
   },
   "dependencies": {
     "@braintree/sanitize-url": "6.0.2",
+    "@excalidraw/laser-pointer": "1.2.0",
     "@excalidraw/random-username": "1.0.0",
     "@radix-ui/react-popover": "1.0.3",
     "@radix-ui/react-tabs": "1.0.2",

public/manifest.json

@@ -11,7 +11,7 @@
     {
       "src": "apple-touch-icon.png",
       "type": "image/png",
-      "sizes": "256x256"
+      "sizes": "180x180"
     }
   ],
   "start_url": "/",

src/actions/actionBoundText.tsx

@@ -10,7 +10,7 @@ import {
   computeBoundTextPosition,
   computeContainerDimensionForBoundText,
   getBoundTextElement,
-  measureText,
+  measureTextElement,
   redrawTextBoundingBox,
 } from "../element/textElement";
 import {
@@ -31,7 +31,6 @@ import {
 } from "../element/types";
 import { AppState } from "../types";
 import { Mutable } from "../utility-types";
-import { getFontString } from "../utils";
 import { register } from "./register";
 
 export const actionUnbindText = register({
@@ -48,10 +47,11 @@ export const actionUnbindText = register({
     selectedElements.forEach((element) => {
       const boundTextElement = getBoundTextElement(element);
       if (boundTextElement) {
-        const { width, height, baseline } = measureText(
-          boundTextElement.originalText,
-          getFontString(boundTextElement),
-          boundTextElement.lineHeight,
+        const { width, height, baseline } = measureTextElement(
+          boundTextElement,
+          {
+            text: boundTextElement.originalText,
+          },
         );
         const originalContainerHeight = getOriginalContainerHeightFromCache(
           element.id,

src/actions/actionCanvas.tsx

@@ -10,7 +10,7 @@ import { getNormalizedZoom } from "../scene";
 import { centerScrollOn } from "../scene/scroll";
 import { getStateForZoom } from "../scene/zoom";
 import { AppState, NormalizedZoomValue } from "../types";
-import { getShortcutKey, setCursor, updateActiveTool } from "../utils";
+import { getShortcutKey, updateActiveTool } from "../utils";
 import { register } from "./register";
 import { Tooltip } from "../components/Tooltip";
 import { newElementWith } from "../element/mutateElement";
@@ -21,6 +21,7 @@ import {
 } from "../appState";
 import { DEFAULT_CANVAS_BACKGROUND_PICKS } from "../colors";
 import { Bounds } from "../element/bounds";
+import { setCursor } from "../cursor";
 
 export const actionChangeViewBackgroundColor = register({
   name: "changeViewBackgroundColor",

src/actions/actionFinalize.tsx

@@ -1,6 +1,6 @@
 import { KEYS } from "../keys";
 import { isInvisiblySmallElement } from "../element";
-import { updateActiveTool, resetCursor } from "../utils";
+import { updateActiveTool } from "../utils";
 import { ToolButton } from "../components/ToolButton";
 import { done } from "../components/icons";
 import { t } from "../i18n";
@@ -15,6 +15,7 @@ import {
 } from "../element/binding";
 import { isBindingElement, isLinearElement } from "../element/typeChecks";
 import { AppState } from "../types";
+import { resetCursor } from "../cursor";
 
 export const actionFinalize = register({
   name: "finalize",
@@ -90,7 +91,9 @@ export const actionFinalize = register({
         }
       }
       if (isInvisiblySmallElement(multiPointElement)) {
-        newElements = newElements.slice(0, -1);
+        newElements = newElements.filter(
+          (el) => el.id !== multiPointElement.id,
+        );
       }
 
       // If the multi point line closes the loop,

src/actions/actionFrame.ts

@@ -4,7 +4,8 @@ import { removeAllElementsFromFrame } from "../frame";
 import { getFrameElements } from "../frame";
 import { KEYS } from "../keys";
 import { AppClassProperties, AppState } from "../types";
-import { setCursorForShape, updateActiveTool } from "../utils";
+import { updateActiveTool } from "../utils";
+import { setCursorForShape } from "../cursor";
 import { register } from "./register";
 
 const isSingleFrameSelected = (appState: AppState, app: AppClassProperties) => {

src/actions/actionToggleGridMode.tsx

@@ -15,6 +15,7 @@ export const actionToggleGridMode = register({
       appState: {
         ...appState,
         gridSize: this.checked!(appState) ? null : GRID_SIZE,
+        objectsSnapModeEnabled: false,
       },
       commitToHistory: false,
     };

src/actions/actionToggleObjectsSnapMode.tsx

@@ -0,0 +1,28 @@
+import { CODES, KEYS } from "../keys";
+import { register } from "./register";
+
+export const actionToggleObjectsSnapMode = register({
+  name: "objectsSnapMode",
+  viewMode: true,
+  trackEvent: {
+    category: "canvas",
+    predicate: (appState) => !appState.objectsSnapModeEnabled,
+  },
+  perform(elements, appState) {
+    return {
+      appState: {
+        ...appState,
+        objectsSnapModeEnabled: !this.checked!(appState),
+        gridSize: null,
+      },
+      commitToHistory: false,
+    };
+  },
+  checked: (appState) => appState.objectsSnapModeEnabled,
+  predicate: (elements, appState, appProps) => {
+    return typeof appProps.objectsSnapModeEnabled === "undefined";
+  },
+  contextItemLabel: "buttons.objectsSnapMode",
+  keyTest: (event) =>
+    !event[KEYS.CTRL_OR_CMD] && event.altKey && event.code === CODES.S,
+});

src/actions/index.ts

@@ -80,6 +80,7 @@ export {
 
 export { actionToggleGridMode } from "./actionToggleGridMode";
 export { actionToggleZenMode } from "./actionToggleZenMode";
+export { actionToggleObjectsSnapMode } from "./actionToggleObjectsSnapMode";
 
 export { actionToggleStats } from "./actionToggleStats";
 export { actionUnbindText, actionBindText } from "./actionBoundText";

src/actions/shortcuts.ts

@@ -28,6 +28,7 @@ export type ShortcutName =
       | "ungroup"
       | "gridMode"
       | "zenMode"
+      | "objectsSnapMode"
       | "stats"
       | "addToLibrary"
       | "viewMode"
@@ -74,6 +75,7 @@ const shortcutMap: Record<ShortcutName, string[]> = {
   ungroup: [getShortcutKey("CtrlOrCmd+Shift+G")],
   gridMode: [getShortcutKey("CtrlOrCmd+'")],
   zenMode: [getShortcutKey("Alt+Z")],
+  objectsSnapMode: [getShortcutKey("Alt+S")],
   stats: [getShortcutKey("Alt+/")],
   addToLibrary: [],
   flipHorizontal: [getShortcutKey("Shift+H")],

src/actions/types.ts

@@ -51,6 +51,7 @@ export type ActionName =
   | "pasteStyles"
   | "gridMode"
   | "zenMode"
+  | "objectsSnapMode"
   | "stats"
   | "changeStrokeColor"
   | "changeBackgroundColor"

src/appState.ts

@@ -99,6 +99,12 @@ export const getDefaultAppState = (): Omit<
     pendingImageElementId: null,
     showHyperlinkPopup: false,
     selectedLinearElement: null,
+    snapLines: [],
+    originSnapOffset: {
+      x: 0,
+      y: 0,
+    },
+    objectsSnapModeEnabled: false,
   };
 };
 
@@ -206,6 +212,9 @@ const APP_STATE_STORAGE_CONF = (<
   pendingImageElementId: { browser: false, export: false, server: false },
   showHyperlinkPopup: { browser: false, export: false, server: false },
   selectedLinearElement: { browser: true, export: false, server: false },
+  snapLines: { browser: false, export: false, server: false },
+  originSnapOffset: { browser: false, export: false, server: false },
+  objectsSnapModeEnabled: { browser: true, export: false, server: false },
 });
 
 const _clearAppStateForStorage = <

src/components/Actions.scss

@@ -2,13 +2,13 @@
 .undo-redo-buttons {
   background-color: var(--island-bg-color);
   border-radius: var(--border-radius-lg);
+  box-shadow: 0 0 0 1px var(--color-surface-lowest);
 }
 
 .zoom-button,
 .undo-redo-buttons button {
-  border: 1px solid var(--default-border-color) !important;
   border-radius: 0 !important;
-  background-color: transparent !important;
+  background-color: var(--color-surface-low) !important;
   font-size: 0.875rem !important;
   width: var(--lg-button-size);
   height: var(--lg-button-size);

src/components/Actions.tsx

@@ -14,13 +14,8 @@ import {
   hasText,
 } from "../scene";
 import { SHAPES } from "../shapes";
-import { UIAppState, Zoom } from "../types";
-import {
-  capitalizeString,
-  isTransparent,
-  updateActiveTool,
-  setCursorForShape,
-} from "../utils";
+import { AppClassProperties, UIAppState, Zoom } from "../types";
+import { capitalizeString, isTransparent } from "../utils";
 import Stack from "./Stack";
 import { ToolButton } from "./ToolButton";
 import { hasStrokeColor } from "../scene/comparisons";
@@ -36,7 +31,12 @@ import {
 
 import "./Actions.scss";
 import DropdownMenu from "./dropdownMenu/DropdownMenu";
-import { EmbedIcon, extraToolsIcon, frameToolIcon } from "./icons";
+import {
+  EmbedIcon,
+  extraToolsIcon,
+  frameToolIcon,
+  laserPointerToolIcon,
+} from "./icons";
 import { KEYS } from "../keys";
 
 export const SelectedShapeActions = ({
@@ -215,18 +215,23 @@ export const SelectedShapeActions = ({
 export const ShapesSwitcher = ({
   interactiveCanvas,
   activeTool,
-  setAppState,
   onImageAction,
   appState,
+  app,
 }: {
   interactiveCanvas: HTMLCanvasElement | null;
   activeTool: UIAppState["activeTool"];
-  setAppState: React.Component<any, UIAppState>["setState"];
   onImageAction: (data: { pointerType: PointerType | null }) => void;
   appState: UIAppState;
+  app: AppClassProperties;
 }) => {
   const [isExtraToolsMenuOpen, setIsExtraToolsMenuOpen] = useState(false);
   const device = useDevice();
+
+  const frameToolSelected = activeTool.type === "frame";
+  const laserToolSelected = activeTool.type === "laser";
+  const embeddableToolSelected = activeTool.type === "embeddable";
+
   return (
     <>
       {SHAPES.map(({ value, icon, key, numericKey, fillable }, index) => {
@@ -251,29 +256,14 @@ export const ShapesSwitcher = ({
             data-testid={`toolbar-${value}`}
             onPointerDown={({ pointerType }) => {
               if (!appState.penDetected && pointerType === "pen") {
-                setAppState({
-                  penDetected: true,
-                  penMode: true,
-                });
+                app.togglePenMode(true);
               }
             }}
             onChange={({ pointerType }) => {
               if (appState.activeTool.type !== value) {
                 trackEvent("toolbar", value, "ui");
               }
-              const nextActiveTool = updateActiveTool(appState, {
-                type: value,
-              });
-              setAppState({
-                activeTool: nextActiveTool,
-                activeEmbeddable: null,
-                multiElement: null,
-                selectedElementIds: {},
-              });
-              setCursorForShape(interactiveCanvas, {
-                ...appState,
-                activeTool: nextActiveTool,
-              });
+              app.setActiveTool({ type: value });
               if (value === "image") {
                 onImageAction({ pointerType });
               }
@@ -300,24 +290,14 @@ export const ShapesSwitcher = ({
             data-testid={`toolbar-frame`}
             onPointerDown={({ pointerType }) => {
               if (!appState.penDetected && pointerType === "pen") {
-                setAppState({
-                  penDetected: true,
-                  penMode: true,
-                });
+                app.togglePenMode(true);
               }
             }}
             onChange={({ pointerType }) => {
               trackEvent("toolbar", "frame", "ui");
-              const nextActiveTool = updateActiveTool(appState, {
-                type: "frame",
-              });
-              setAppState({
-                activeTool: nextActiveTool,
-                multiElement: null,
-                selectedElementIds: {},
-                activeEmbeddable: null,
-              });
+              app.setActiveTool({ type: "frame" });
             }}
+            selected={activeTool.type === "frame"}
           />
           <ToolButton
             className={clsx("Shape", { fillable: false })}
@@ -330,30 +310,28 @@ export const ShapesSwitcher = ({
             data-testid={`toolbar-embeddable`}
             onPointerDown={({ pointerType }) => {
               if (!appState.penDetected && pointerType === "pen") {
-                setAppState({
-                  penDetected: true,
-                  penMode: true,
-                });
+                app.togglePenMode(true);
               }
             }}
             onChange={({ pointerType }) => {
               trackEvent("toolbar", "embeddable", "ui");
-              const nextActiveTool = updateActiveTool(appState, {
-                type: "embeddable",
-              });
-              setAppState({
-                activeTool: nextActiveTool,
-                multiElement: null,
-                selectedElementIds: {},
-                activeEmbeddable: null,
-              });
+              app.setActiveTool({ type: "embeddable" });
             }}
+            selected={activeTool.type === "embeddable"}
           />
         </>
       ) : (
         <DropdownMenu open={isExtraToolsMenuOpen}>
           <DropdownMenu.Trigger
-            className="App-toolbar__extra-tools-trigger"
+            className={clsx("App-toolbar__extra-tools-trigger", {
+              "App-toolbar__extra-tools-trigger--selected":
+                frameToolSelected ||
+                embeddableToolSelected ||
+                // in collab we're already highlighting the laser button
+                // outside toolbar, so let's not highlight extra-tools button
+                // on top of it
+                (laserToolSelected && !app.props.isCollaborating),
+            })}
             onToggle={() => setIsExtraToolsMenuOpen(!isExtraToolsMenuOpen)}
             title={t("toolBar.extraTools")}
           >
@@ -366,37 +344,36 @@ export const ShapesSwitcher = ({
           >
             <DropdownMenu.Item
               onSelect={() => {
-                const nextActiveTool = updateActiveTool(appState, {
-                  type: "frame",
-                });
-                setAppState({
-                  activeTool: nextActiveTool,
-                  multiElement: null,
-                  selectedElementIds: {},
-                });
+                app.setActiveTool({ type: "frame" });
               }}
               icon={frameToolIcon}
               shortcut={KEYS.F.toLocaleUpperCase()}
               data-testid="toolbar-frame"
+              selected={frameToolSelected}
             >
               {t("toolBar.frame")}
             </DropdownMenu.Item>
             <DropdownMenu.Item
               onSelect={() => {
-                const nextActiveTool = updateActiveTool(appState, {
-                  type: "embeddable",
-                });
-                setAppState({
-                  activeTool: nextActiveTool,
-                  multiElement: null,
-                  selectedElementIds: {},
-                });
+                app.setActiveTool({ type: "embeddable" });
               }}
               icon={EmbedIcon}
               data-testid="toolbar-embeddable"
+              selected={embeddableToolSelected}
             >
               {t("toolBar.embeddable")}
             </DropdownMenu.Item>
+            <DropdownMenu.Item
+              onSelect={() => {
+                app.setActiveTool({ type: "laser" });
+              }}
+              icon={laserPointerToolIcon}
+              data-testid="toolbar-laser"
+              selected={laserToolSelected}
+              shortcut={KEYS.K.toLocaleUpperCase()}
+            >
+              {t("toolBar.laser")}
+            </DropdownMenu.Item>
           </DropdownMenu.Content>
         </DropdownMenu>
       )}

src/components/App.tsx

@@ -35,6 +35,7 @@ import {
   actionLink,
   actionToggleElementLock,
   actionToggleLinearEditor,
+  actionToggleObjectsSnapMode,
 } from "../actions";
 import { createRedoAction, createUndoAction } from "../actions/actionHistory";
 import { ActionManager } from "../actions/manager";
@@ -210,7 +211,7 @@ import {
 import Scene from "../scene/Scene";
 import { RenderInteractiveSceneCallback, ScrollBars } from "../scene/types";
 import { getStateForZoom } from "../scene/zoom";
-import { findShapeByKey, SHAPES } from "../shapes";
+import { findShapeByKey } from "../shapes";
 import {
   AppClassProperties,
   AppProps,
@@ -228,6 +229,9 @@ import {
   FrameNameBoundsCache,
   SidebarName,
   SidebarTabName,
+  KeyboardModifiersObject,
+  CollaboratorPointer,
+  ToolType,
 } from "../types";
 import {
   debounce,
@@ -237,18 +241,14 @@ import {
   isInputLike,
   isToolIcon,
   isWritableElement,
-  resetCursor,
   resolvablePromise,
   sceneCoordsToViewportCoords,
-  setCursor,
-  setCursorForShape,
   tupleToCoors,
   viewportCoordsToSceneCoords,
   withBatchedUpdates,
   wrapEvent,
   withBatchedUpdatesThrottled,
   updateObject,
-  setEraserCursor,
   updateActiveTool,
   getShortcutKey,
   isTransparent,
@@ -342,6 +342,17 @@ import {
 import { actionToggleHandTool, zoomToFit } from "../actions/actionCanvas";
 import { jotaiStore } from "../jotai";
 import { activeConfirmDialogAtom } from "./ActiveConfirmDialog";
+import {
+  getSnapLinesAtPointer,
+  snapDraggedElements,
+  isActiveToolNonLinearSnappable,
+  snapNewElement,
+  snapResizingElements,
+  isSnappingEnabled,
+  getVisibleGaps,
+  getReferenceSnapPoints,
+  SnapCache,
+} from "../snapping";
 import { actionWrapTextInContainer } from "../actions/actionBoundText";
 import BraveMeasureTextError from "./BraveMeasureTextError";
 import { activeEyeDropperAtom } from "./EyeDropper";
@@ -354,6 +365,14 @@ import { isSidebarDockedAtom } from "./Sidebar/Sidebar";
 import { StaticCanvas, InteractiveCanvas } from "./canvases";
 import { Renderer } from "../scene/Renderer";
 import { ShapeCache } from "../scene/ShapeCache";
+import { LaserToolOverlay } from "./LaserTool/LaserTool";
+import { LaserPathManager } from "./LaserTool/LaserPathManager";
+import {
+  setEraserCursor,
+  setCursor,
+  resetCursor,
+  setCursorForShape,
+} from "../cursor";
 
 const AppContext = React.createContext<AppClassProperties>(null!);
 const AppPropsContext = React.createContext<AppProps>(null!);
@@ -478,10 +497,13 @@ class App extends React.Component<AppProps, AppState> {
   private iFrameRefs = new Map<ExcalidrawElement["id"], HTMLIFrameElement>();
 
   hitLinkElement?: NonDeletedExcalidrawElement;
-  lastPointerDown: React.PointerEvent<HTMLElement> | null = null;
-  lastPointerUp: React.PointerEvent<HTMLElement> | PointerEvent | null = null;
+  lastPointerDownEvent: React.PointerEvent<HTMLElement> | null = null;
+  lastPointerUpEvent: React.PointerEvent<HTMLElement> | PointerEvent | null =
+    null;
   lastViewportPosition = { x: 0, y: 0 };
 
+  laserPathManager: LaserPathManager = new LaserPathManager(this);
+
   constructor(props: AppProps) {
     super(props);
     const defaultAppState = getDefaultAppState();
@@ -490,6 +512,7 @@ class App extends React.Component<AppProps, AppState> {
       viewModeEnabled = false,
       zenModeEnabled = false,
       gridModeEnabled = false,
+      objectsSnapModeEnabled = false,
       theme = defaultAppState.theme,
       name = defaultAppState.name,
     } = props;
@@ -500,6 +523,7 @@ class App extends React.Component<AppProps, AppState> {
       ...this.getCanvasOffsets(),
       viewModeEnabled,
       zenModeEnabled,
+      objectsSnapModeEnabled,
       gridSize: gridModeEnabled ? GRID_SIZE : null,
       name,
       width: window.innerWidth,
@@ -1086,7 +1110,7 @@ class App extends React.Component<AppProps, AppState> {
             cursor: CURSOR_TYPE.MOVE,
             pointerEvents: this.state.viewModeEnabled
               ? POINTER_EVENTS.disabled
-              : POINTER_EVENTS.inheritFromUI,
+              : POINTER_EVENTS.enabled,
           }}
           onPointerDown={(event) => this.handleCanvasPointerDown(event)}
           onWheel={(event) => this.handleWheel(event)}
@@ -1133,6 +1157,9 @@ class App extends React.Component<AppProps, AppState> {
             this.state.selectionElement ||
             this.state.draggingElement ||
             this.state.resizingElement ||
+            (this.state.activeTool.type === "laser" &&
+              // technically we can just test on this once we make it more safe
+              this.state.cursorButton === "down") ||
             (this.state.editingElement &&
               !isTextElement(this.state.editingElement))
               ? POINTER_EVENTS.disabled
@@ -1188,12 +1215,14 @@ class App extends React.Component<AppProps, AppState> {
                             !this.scene.getElementsIncludingDeleted().length
                           }
                           app={this}
+                          isCollaborating={this.props.isCollaborating}
                         >
                           {this.props.children}
                         </LayerUI>
                         <div className="excalidraw-textEditorContainer" />
                         <div className="excalidraw-contextMenuContainer" />
                         <div className="excalidraw-eye-dropper-container" />
+                        <LaserToolOverlay manager={this.laserPathManager} />
                         {selectedElements.length === 1 &&
                           !this.state.contextMenu &&
                           this.state.showHyperlinkPopup && (
@@ -1330,7 +1359,8 @@ class App extends React.Component<AppProps, AppState> {
   private openEyeDropper = ({ type }: { type: "stroke" | "background" }) => {
     jotaiStore.set(activeEyeDropperAtom, {
       swapPreviewOnAlt: true,
-      previewType: type === "stroke" ? "strokeColor" : "backgroundColor",
+      colorPickerType:
+        type === "stroke" ? "elementStroke" : "elementBackground",
       onSelect: (color, event) => {
         const shouldUpdateStrokeColor =
           (type === "background" && event.altKey) ||
@@ -1341,12 +1371,14 @@ class App extends React.Component<AppProps, AppState> {
           this.state.activeTool.type !== "selection"
         ) {
           if (shouldUpdateStrokeColor) {
-            this.setState({
-              currentItemStrokeColor: color,
+            this.syncActionResult({
+              appState: { ...this.state, currentItemStrokeColor: color },
+              commitToHistory: true,
             });
           } else {
-            this.setState({
-              currentItemBackgroundColor: color,
+            this.syncActionResult({
+              appState: { ...this.state, currentItemBackgroundColor: color },
+              commitToHistory: true,
             });
           }
         } else {
@@ -1718,7 +1750,9 @@ class App extends React.Component<AppProps, AppState> {
     this.removeEventListeners();
     this.scene.destroy();
     this.library.destroy();
+    this.laserPathManager.destroy();
     ShapeCache.destroy();
+    SnapCache.destroy();
     clearTimeout(touchTimeout);
     isSomeElementSelected.clearCache();
     selectGroupsForSelectedElements.clearCache();
@@ -2533,10 +2567,11 @@ class App extends React.Component<AppProps, AppState> {
     });
   };
 
-  togglePenMode = () => {
+  togglePenMode = (force?: boolean) => {
     this.setState((prevState) => {
       return {
-        penMode: !prevState.penMode,
+        penMode: force ?? !prevState.penMode,
+        penDetected: true,
       };
     });
   };
@@ -3030,6 +3065,15 @@ class App extends React.Component<AppProps, AppState> {
         }
       }
 
+      if (event.key === KEYS.K && !event.altKey && !event[KEYS.CTRL_OR_CMD]) {
+        if (this.state.activeTool.type === "laser") {
+          this.setActiveTool({ type: "selection" });
+        } else {
+          this.setActiveTool({ type: "laser" });
+        }
+        return;
+      }
+
       if (
         event[KEYS.CTRL_OR_CMD] &&
         (event.key === KEYS.BACKSPACE || event.key === KEYS.DELETE)
@@ -3089,15 +3133,10 @@ class App extends React.Component<AppProps, AppState> {
     }
   });
 
-  private setActiveTool = (
+  setActiveTool = (
     tool:
       | {
-          type:
-            | typeof SHAPES[number]["value"]
-            | "eraser"
-            | "hand"
-            | "frame"
-            | "embeddable";
+          type: ToolType;
         }
       | { type: "custom"; customType: string },
   ) => {
@@ -3116,17 +3155,30 @@ class App extends React.Component<AppProps, AppState> {
     if (nextActiveTool.type === "image") {
       this.onImageAction();
     }
-    if (nextActiveTool.type !== "selection") {
-      this.setState({
-        activeTool: nextActiveTool,
-        selectedElementIds: makeNextSelectedElementIds({}, this.state),
-        selectedGroupIds: {},
-        editingGroupId: null,
+
+    this.setState((prevState) => {
+      const commonResets = {
+        snapLines: prevState.snapLines.length ? [] : prevState.snapLines,
+        originSnapOffset: null,
         activeEmbeddable: null,
-      });
-    } else {
-      this.setState({ activeTool: nextActiveTool, activeEmbeddable: null });
-    }
+      } as const;
+      if (nextActiveTool.type !== "selection") {
+        return {
+          ...prevState,
+          activeTool: nextActiveTool,
+          selectedElementIds: makeNextSelectedElementIds({}, prevState),
+          selectedGroupIds: makeNextSelectedElementIds({}, prevState),
+          editingGroupId: null,
+          multiElement: null,
+          ...commonResets,
+        };
+      }
+      return {
+        ...prevState,
+        activeTool: nextActiveTool,
+        ...commonResets,
+      };
+    });
   };
 
   private setCursor = (cursor: string) => {
@@ -3703,10 +3755,10 @@ class App extends React.Component<AppProps, AppState> {
     isTouchScreen: boolean,
   ) => {
     const draggedDistance = distance2d(
-      this.lastPointerDown!.clientX,
-      this.lastPointerDown!.clientY,
-      this.lastPointerUp!.clientX,
-      this.lastPointerUp!.clientY,
+      this.lastPointerDownEvent!.clientX,
+      this.lastPointerDownEvent!.clientY,
+      this.lastPointerUpEvent!.clientX,
+      this.lastPointerUpEvent!.clientY,
     );
     if (
       !this.hitLinkElement ||
@@ -3717,7 +3769,7 @@ class App extends React.Component<AppProps, AppState> {
       return;
     }
     const lastPointerDownCoords = viewportCoordsToSceneCoords(
-      this.lastPointerDown!,
+      this.lastPointerDownEvent!,
       this.state,
     );
     const lastPointerDownHittingLinkIcon = isPointHittingLink(
@@ -3727,7 +3779,7 @@ class App extends React.Component<AppProps, AppState> {
       this.device.isMobile,
     );
     const lastPointerUpCoords = viewportCoordsToSceneCoords(
-      this.lastPointerUp!,
+      this.lastPointerUpEvent!,
       this.state,
     );
     const lastPointerUpHittingLinkIcon = isPointHittingLink(
@@ -3862,6 +3914,30 @@ class App extends React.Component<AppProps, AppState> {
     const scenePointer = viewportCoordsToSceneCoords(event, this.state);
     const { x: scenePointerX, y: scenePointerY } = scenePointer;
 
+    if (
+      !this.state.draggingElement &&
+      isActiveToolNonLinearSnappable(this.state.activeTool.type)
+    ) {
+      const { originOffset, snapLines } = getSnapLinesAtPointer(
+        this.scene.getNonDeletedElements(),
+        this.state,
+        {
+          x: scenePointerX,
+          y: scenePointerY,
+        },
+        event,
+      );
+
+      this.setState({
+        snapLines,
+        originSnapOffset: originOffset,
+      });
+    } else if (!this.state.draggingElement) {
+      this.setState({
+        snapLines: [],
+      });
+    }
+
     if (
       this.state.editingLinearElement &&
       !this.state.editingLinearElement.isDragging
@@ -4332,6 +4408,10 @@ class App extends React.Component<AppProps, AppState> {
       this.setState({ contextMenu: null });
     }
 
+    if (this.state.snapLines) {
+      this.setAppState({ snapLines: [] });
+    }
+
     this.updateGestureOnPointerDown(event);
 
     // if dragging element is freedraw and another pointerdown event occurs
@@ -4404,17 +4484,21 @@ class App extends React.Component<AppProps, AppState> {
       return;
     }
 
-    this.lastPointerDown = event;
+    this.lastPointerDownEvent = event;
+
+    // we must exit before we set `cursorButton` state and `savePointer`
+    // else it will send pointer state & laser pointer events in collab when
+    // panning
+    if (this.handleCanvasPanUsingWheelOrSpaceDrag(event)) {
+      return;
+    }
+
     this.setState({
       lastPointerDownWith: event.pointerType,
       cursorButton: "down",
     });
     this.savePointer(event.clientX, event.clientY, "down");
 
-    if (this.handleCanvasPanUsingWheelOrSpaceDrag(event)) {
-      return;
-    }
-
     // only handle left mouse button or touch
     if (
       event.button !== POINTER_BUTTON.MAIN &&
@@ -4505,6 +4589,11 @@ class App extends React.Component<AppProps, AppState> {
       setCursor(this.interactiveCanvas, CURSOR_TYPE.AUTO);
     } else if (this.state.activeTool.type === "frame") {
       this.createFrameElementOnPointerDown(pointerDownState);
+    } else if (this.state.activeTool.type === "laser") {
+      this.laserPathManager.startPath(
+        pointerDownState.lastCoords.x,
+        pointerDownState.lastCoords.y,
+      );
     } else if (
       this.state.activeTool.type !== "eraser" &&
       this.state.activeTool.type !== "hand"
@@ -4528,7 +4617,7 @@ class App extends React.Component<AppProps, AppState> {
 
     lastPointerUp = onPointerUp;
 
-    if (!this.state.viewModeEnabled) {
+    if (!this.state.viewModeEnabled || this.state.activeTool.type === "laser") {
       window.addEventListener(EVENT.POINTER_MOVE, onPointerMove);
       window.addEventListener(EVENT.POINTER_UP, onPointerUp);
       window.addEventListener(EVENT.KEYDOWN, onKeyDown);
@@ -4544,14 +4633,14 @@ class App extends React.Component<AppProps, AppState> {
     event: React.PointerEvent<HTMLCanvasElement>,
   ) => {
     this.removePointer(event);
-    this.lastPointerUp = event;
+    this.lastPointerUpEvent = event;
 
     const scenePointer = viewportCoordsToSceneCoords(
       { clientX: event.clientX, clientY: event.clientY },
       this.state,
     );
     const clicklength =
-      event.timeStamp - (this.lastPointerDown?.timeStamp ?? 0);
+      event.timeStamp - (this.lastPointerDownEvent?.timeStamp ?? 0);
     if (this.device.isMobile && clicklength < 300) {
       const hitElement = this.getElementAtPosition(
         scenePointer.x,
@@ -5305,7 +5394,9 @@ class App extends React.Component<AppProps, AppState> {
     const [gridX, gridY] = getGridPoint(
       sceneX,
       sceneY,
-      this.lastPointerDown?.[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
+      this.lastPointerDownEvent?.[KEYS.CTRL_OR_CMD]
+        ? null
+        : this.state.gridSize,
     );
 
     const embedLink = getEmbedLink(link);
@@ -5355,7 +5446,9 @@ class App extends React.Component<AppProps, AppState> {
     const [gridX, gridY] = getGridPoint(
       sceneX,
       sceneY,
-      this.lastPointerDown?.[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
+      this.lastPointerDownEvent?.[KEYS.CTRL_OR_CMD]
+        ? null
+        : this.state.gridSize,
     );
 
     const topLayerFrame = this.getTopLayerFrameAtSceneCoords({
@@ -5532,7 +5625,9 @@ class App extends React.Component<AppProps, AppState> {
     const [gridX, gridY] = getGridPoint(
       pointerDownState.origin.x,
       pointerDownState.origin.y,
-      this.lastPointerDown?.[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
+      this.lastPointerDownEvent?.[KEYS.CTRL_OR_CMD]
+        ? null
+        : this.state.gridSize,
     );
 
     const topLayerFrame = this.getTopLayerFrameAtSceneCoords({
@@ -5590,7 +5685,9 @@ class App extends React.Component<AppProps, AppState> {
     const [gridX, gridY] = getGridPoint(
       pointerDownState.origin.x,
       pointerDownState.origin.y,
-      this.lastPointerDown?.[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
+      this.lastPointerDownEvent?.[KEYS.CTRL_OR_CMD]
+        ? null
+        : this.state.gridSize,
     );
 
     const frame = newFrameElement({
@@ -5613,6 +5710,52 @@ class App extends React.Component<AppProps, AppState> {
     });
   };
 
+  private maybeCacheReferenceSnapPoints(
+    event: KeyboardModifiersObject,
+    selectedElements: ExcalidrawElement[],
+    recomputeAnyways: boolean = false,
+  ) {
+    if (
+      isSnappingEnabled({
+        event,
+        appState: this.state,
+        selectedElements,
+      }) &&
+      (recomputeAnyways || !SnapCache.getReferenceSnapPoints())
+    ) {
+      SnapCache.setReferenceSnapPoints(
+        getReferenceSnapPoints(
+          this.scene.getNonDeletedElements(),
+          selectedElements,
+          this.state,
+        ),
+      );
+    }
+  }
+
+  private maybeCacheVisibleGaps(
+    event: KeyboardModifiersObject,
+    selectedElements: ExcalidrawElement[],
+    recomputeAnyways: boolean = false,
+  ) {
+    if (
+      isSnappingEnabled({
+        event,
+        appState: this.state,
+        selectedElements,
+      }) &&
+      (recomputeAnyways || !SnapCache.getVisibleGaps())
+    ) {
+      SnapCache.setVisibleGaps(
+        getVisibleGaps(
+          this.scene.getNonDeletedElements(),
+          selectedElements,
+          this.state,
+        ),
+      );
+    }
+  }
+
   private onKeyDownFromPointerDownHandler(
     pointerDownState: PointerDownState,
   ): (event: KeyboardEvent) => void {
@@ -5670,6 +5813,10 @@ class App extends React.Component<AppProps, AppState> {
         return;
       }
 
+      if (this.state.activeTool.type === "laser") {
+        this.laserPathManager.addPointToPath(pointerCoords.x, pointerCoords.y);
+      }
+
       const [gridX, gridY] = getGridPoint(
         pointerCoords.x,
         pointerCoords.y,
@@ -5842,33 +5989,62 @@ class App extends React.Component<AppProps, AppState> {
           !this.state.editingElement &&
           this.state.activeEmbeddable?.state !== "active"
         ) {
-          const [dragX, dragY] = getGridPoint(
-            pointerCoords.x - pointerDownState.drag.offset.x,
-            pointerCoords.y - pointerDownState.drag.offset.y,
-            event[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
-          );
+          const dragOffset = {
+            x: pointerCoords.x - pointerDownState.origin.x,
+            y: pointerCoords.y - pointerDownState.origin.y,
+          };
 
-          const [dragDistanceX, dragDistanceY] = [
-            Math.abs(pointerCoords.x - pointerDownState.origin.x),
-            Math.abs(pointerCoords.y - pointerDownState.origin.y),
+          const originalElements = [
+            ...pointerDownState.originalElements.values(),
           ];
 
           // We only drag in one direction if shift is pressed
           const lockDirection = event.shiftKey;
+
+          if (lockDirection) {
+            const distanceX = Math.abs(dragOffset.x);
+            const distanceY = Math.abs(dragOffset.y);
+
+            const lockX = lockDirection && distanceX < distanceY;
+            const lockY = lockDirection && distanceX > distanceY;
+
+            if (lockX) {
+              dragOffset.x = 0;
+            }
+
+            if (lockY) {
+              dragOffset.y = 0;
+            }
+          }
+
+          // Snap cache *must* be synchronously popuplated before initial drag,
+          // otherwise the first drag even will not snap, causing a jump before
+          // it snaps to its position if previously snapped already.
+          this.maybeCacheVisibleGaps(event, selectedElements);
+          this.maybeCacheReferenceSnapPoints(event, selectedElements);
+
+          const { snapOffset, snapLines } = snapDraggedElements(
+            getSelectedElements(originalElements, this.state),
+            dragOffset,
+            this.state,
+            event,
+          );
+
+          this.setState({ snapLines });
+
           // when we're editing the name of a frame, we want the user to be
           // able to select and interact with the text input
           !this.state.editingFrame &&
             dragSelectedElements(
               pointerDownState,
               selectedElements,
-              dragX,
-              dragY,
-              lockDirection,
-              dragDistanceX,
-              dragDistanceY,
+              dragOffset,
               this.state,
               this.scene,
+              snapOffset,
+              event[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
             );
+
           this.maybeSuggestBindingForAll(selectedElements);
 
           // We duplicate the selected element if alt is pressed on pointer move
@@ -5909,15 +6085,21 @@ class App extends React.Component<AppProps, AppState> {
                   groupIdMap,
                   element,
                 );
-                const [originDragX, originDragY] = getGridPoint(
-                  pointerDownState.origin.x - pointerDownState.drag.offset.x,
-                  pointerDownState.origin.y - pointerDownState.drag.offset.y,
-                  event[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
-                );
+                const origElement = pointerDownState.originalElements.get(
+                  element.id,
+                )!;
                 mutateElement(duplicatedElement, {
-                  x: duplicatedElement.x + (originDragX - dragX),
-                  y: duplicatedElement.y + (originDragY - dragY),
+                  x: origElement.x,
+                  y: origElement.y,
                 });
+
+                // put duplicated element to pointerDownState.originalElements
+                // so that we can snap to the duplicated element without releasing
+                pointerDownState.originalElements.set(
+                  duplicatedElement.id,
+                  duplicatedElement,
+                );
+
                 nextElements.push(duplicatedElement);
                 elementsToAppend.push(element);
                 oldIdToDuplicatedId.set(element.id, duplicatedElement.id);
@@ -5943,6 +6125,8 @@ class App extends React.Component<AppProps, AppState> {
               oldIdToDuplicatedId,
             );
             this.scene.replaceAllElements(nextSceneElements);
+            this.maybeCacheVisibleGaps(event, selectedElements, true);
+            this.maybeCacheReferenceSnapPoints(event, selectedElements, true);
           }
           return;
         }
@@ -6159,6 +6343,7 @@ class App extends React.Component<AppProps, AppState> {
         isResizing,
         isRotating,
       } = this.state;
+
       this.setState({
         isResizing: false,
         isRotating: false,
@@ -6173,8 +6358,14 @@ class App extends React.Component<AppProps, AppState> {
           multiElement || isTextElement(this.state.editingElement)
             ? this.state.editingElement
             : null,
+        snapLines: [],
+
+        originSnapOffset: null,
       });
 
+      SnapCache.setReferenceSnapPoints(null);
+      SnapCache.setVisibleGaps(null);
+
       this.savePointer(childEvent.clientX, childEvent.clientY, "up");
 
       this.setState({
@@ -6398,7 +6589,9 @@ class App extends React.Component<AppProps, AppState> {
       ) {
         // remove invisible element which was added in onPointerDown
         this.scene.replaceAllElements(
-          this.scene.getElementsIncludingDeleted().slice(0, -1),
+          this.scene
+            .getElementsIncludingDeleted()
+            .filter((el) => el.id !== draggingElement.id),
         );
         this.setState({
           draggingElement: null,
@@ -6620,17 +6813,17 @@ class App extends React.Component<AppProps, AppState> {
       }
       if (isEraserActive(this.state)) {
         const draggedDistance = distance2d(
-          this.lastPointerDown!.clientX,
-          this.lastPointerDown!.clientY,
-          this.lastPointerUp!.clientX,
-          this.lastPointerUp!.clientY,
+          this.lastPointerDownEvent!.clientX,
+          this.lastPointerDownEvent!.clientY,
+          this.lastPointerUpEvent!.clientX,
+          this.lastPointerUpEvent!.clientY,
         );
 
         if (draggedDistance === 0) {
           const scenePointer = viewportCoordsToSceneCoords(
             {
-              clientX: this.lastPointerUp!.clientX,
-              clientY: this.lastPointerUp!.clientY,
+              clientX: this.lastPointerUpEvent!.clientX,
+              clientY: this.lastPointerUpEvent!.clientY,
             },
             this.state,
           );
@@ -6870,6 +7063,11 @@ class App extends React.Component<AppProps, AppState> {
           : unbindLinearElements)(this.scene.getSelectedElements(this.state));
       }
 
+      if (activeTool.type === "laser") {
+        this.laserPathManager.endPath();
+        return;
+      }
+
       if (!activeTool.locked && activeTool.type !== "freedraw") {
         resetCursor(this.interactiveCanvas);
         this.setState({
@@ -6886,14 +7084,16 @@ class App extends React.Component<AppProps, AppState> {
 
       if (
         hitElement &&
-        this.lastPointerUp &&
-        this.lastPointerDown &&
-        this.lastPointerUp.timeStamp - this.lastPointerDown.timeStamp < 300 &&
+        this.lastPointerUpEvent &&
+        this.lastPointerDownEvent &&
+        this.lastPointerUpEvent.timeStamp -
+          this.lastPointerDownEvent.timeStamp <
+          300 &&
         gesture.pointers.size <= 1 &&
         isEmbeddableElement(hitElement) &&
         this.isEmbeddableCenter(
           hitElement,
-          this.lastPointerUp,
+          this.lastPointerUpEvent,
           pointerDownState.origin.x,
           pointerDownState.origin.y,
         )
@@ -7702,7 +7902,7 @@ class App extends React.Component<AppProps, AppState> {
         shouldResizeFromCenter(event),
       );
     } else {
-      const [gridX, gridY] = getGridPoint(
+      let [gridX, gridY] = getGridPoint(
         pointerCoords.x,
         pointerCoords.y,
         event[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
@@ -7716,6 +7916,33 @@ class App extends React.Component<AppProps, AppState> {
           ? image.width / image.height
           : null;
 
+      this.maybeCacheReferenceSnapPoints(event, [draggingElement]);
+
+      const { snapOffset, snapLines } = snapNewElement(
+        draggingElement,
+        this.state,
+        event,
+        {
+          x:
+            pointerDownState.originInGrid.x +
+            (this.state.originSnapOffset?.x ?? 0),
+          y:
+            pointerDownState.originInGrid.y +
+            (this.state.originSnapOffset?.y ?? 0),
+        },
+        {
+          x: gridX - pointerDownState.originInGrid.x,
+          y: gridY - pointerDownState.originInGrid.y,
+        },
+      );
+
+      gridX += snapOffset.x;
+      gridY += snapOffset.y;
+
+      this.setState({
+        snapLines,
+      });
+
       dragNewElement(
         draggingElement,
         this.state.activeTool.type,
@@ -7730,6 +7957,7 @@ class App extends React.Component<AppProps, AppState> {
           : shouldMaintainAspectRatio(event),
         shouldResizeFromCenter(event),
         aspectRatio,
+        this.state.originSnapOffset,
       );
 
       this.maybeSuggestBindingForAll([draggingElement]);
@@ -7771,7 +7999,7 @@ class App extends React.Component<AppProps, AppState> {
       activeEmbeddable: null,
     });
     const pointerCoords = pointerDownState.lastCoords;
-    const [resizeX, resizeY] = getGridPoint(
+    let [resizeX, resizeY] = getGridPoint(
       pointerCoords.x - pointerDownState.resize.offset.x,
       pointerCoords.y - pointerDownState.resize.offset.y,
       event[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
@@ -7799,6 +8027,41 @@ class App extends React.Component<AppProps, AppState> {
       });
     });
 
+    // check needed for avoiding flickering when a key gets pressed
+    // during dragging
+    if (!this.state.selectedElementsAreBeingDragged) {
+      const [gridX, gridY] = getGridPoint(
+        pointerCoords.x,
+        pointerCoords.y,
+        event[KEYS.CTRL_OR_CMD] ? null : this.state.gridSize,
+      );
+
+      const dragOffset = {
+        x: gridX - pointerDownState.originInGrid.x,
+        y: gridY - pointerDownState.originInGrid.y,
+      };
+
+      const originalElements = [...pointerDownState.originalElements.values()];
+
+      this.maybeCacheReferenceSnapPoints(event, selectedElements);
+
+      const { snapOffset, snapLines } = snapResizingElements(
+        selectedElements,
+        getSelectedElements(originalElements, this.state),
+        this.state,
+        event,
+        dragOffset,
+        transformHandleType,
+      );
+
+      resizeX += snapOffset.x;
+      resizeY += snapOffset.y;
+
+      this.setState({
+        snapLines,
+      });
+    }
+
     if (
       transformElements(
         pointerDownState,
@@ -7814,6 +8077,7 @@ class App extends React.Component<AppProps, AppState> {
         resizeY,
         pointerDownState.resize.center.x,
         pointerDownState.resize.center.y,
+        this.state,
       )
     ) {
       this.maybeSuggestBindingForAll(selectedElements);
@@ -7901,6 +8165,7 @@ class App extends React.Component<AppProps, AppState> {
         actionUnlockAllElements,
         CONTEXT_MENU_SEPARATOR,
         actionToggleGridMode,
+        actionToggleObjectsSnapMode,
         actionToggleZenMode,
         actionToggleViewMode,
         actionToggleStats,
@@ -8047,15 +8312,21 @@ class App extends React.Component<AppProps, AppState> {
     if (!x || !y) {
       return;
     }
-    const pointer = viewportCoordsToSceneCoords(
+    const { x: sceneX, y: sceneY } = viewportCoordsToSceneCoords(
       { clientX: x, clientY: y },
       this.state,
     );
 
-    if (isNaN(pointer.x) || isNaN(pointer.y)) {
+    if (isNaN(sceneX) || isNaN(sceneY)) {
       // sometimes the pointer goes off screen
     }
 
+    const pointer: CollaboratorPointer = {
+      x: sceneX,
+      y: sceneY,
+      tool: this.state.activeTool.type === "laser" ? "laser" : "pointer",
+    };
+
     this.props.onPointerUpdate?.({
       pointer,
       button,

src/components/ColorPicker/ColorInput.tsx

@@ -1,7 +1,10 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import { getColor } from "./ColorPicker";
 import { useAtom } from "jotai";
-import { activeColorPickerSectionAtom } from "./colorPickerUtils";
+import {
+  ColorPickerType,
+  activeColorPickerSectionAtom,
+} from "./colorPickerUtils";
 import { eyeDropperIcon } from "../icons";
 import { jotaiScope } from "../../jotai";
 import { KEYS } from "../../keys";
@@ -15,14 +18,14 @@ interface ColorInputProps {
   color: string;
   onChange: (color: string) => void;
   label: string;
-  eyeDropperType: "strokeColor" | "backgroundColor";
+  colorPickerType: ColorPickerType;
 }
 
 export const ColorInput = ({
   color,
   onChange,
   label,
-  eyeDropperType,
+  colorPickerType,
 }: ColorInputProps) => {
   const device = useDevice();
   const [innerValue, setInnerValue] = useState(color);
@@ -116,7 +119,7 @@ export const ColorInput = ({
                   : {
                       keepOpenOnAlt: false,
                       onSelect: (color) => onChange(color),
-                      previewType: eyeDropperType,
+                      colorPickerType,
                     },
               )
             }

src/components/ColorPicker/ColorPicker.tsx

@@ -82,14 +82,7 @@ const ColorPickerPopupContent = ({
   const { container } = useExcalidrawContainer();
   const { isMobile, isLandscape } = useDevice();
 
-  const eyeDropperType =
-    type === "canvasBackground"
-      ? undefined
-      : type === "elementBackground"
-      ? "backgroundColor"
-      : "strokeColor";
-
-  const colorInputJSX = eyeDropperType && (
+  const colorInputJSX = (
     <div>
       <PickerHeading>{t("colorPicker.hexCode")}</PickerHeading>
       <ColorInput
@@ -98,7 +91,7 @@ const ColorPickerPopupContent = ({
         onChange={(color) => {
           onChange(color);
         }}
-        eyeDropperType={eyeDropperType}
+        colorPickerType={type}
       />
     </div>
   );
@@ -160,7 +153,7 @@ const ColorPickerPopupContent = ({
             "0px 7px 14px rgba(0, 0, 0, 0.05), 0px 0px 3.12708px rgba(0, 0, 0, 0.0798), 0px 0px 0.931014px rgba(0, 0, 0, 0.1702)",
         }}
       >
-        {palette && eyeDropperType ? (
+        {palette ? (
           <Picker
             palette={palette}
             color={color}
@@ -173,7 +166,7 @@ const ColorPickerPopupContent = ({
                   state = state || {
                     keepOpenOnAlt: true,
                     onSelect: onChange,
-                    previewType: eyeDropperType,
+                    colorPickerType: type,
                   };
                   state.keepOpenOnAlt = true;
                   return state;
@@ -184,7 +177,7 @@ const ColorPickerPopupContent = ({
                   : {
                       keepOpenOnAlt: false,
                       onSelect: onChange,
-                      previewType: eyeDropperType,
+                      colorPickerType: type,
                     };
               });
             }}

src/components/EyeDropper.tsx

@@ -1,35 +1,47 @@
 import { atom } from "jotai";
-import { useEffect, useRef } from "react";
+import React, { useEffect, useRef } from "react";
 import { createPortal } from "react-dom";
 import { rgbToHex } from "../colors";
 import { EVENT } from "../constants";
 import { useUIAppState } from "../context/ui-appState";
-import { mutateElement } from "../element/mutateElement";
 import { useCreatePortalContainer } from "../hooks/useCreatePortalContainer";
 import { useOutsideClick } from "../hooks/useOutsideClick";
 import { KEYS } from "../keys";
 import { getSelectedElements } from "../scene";
-import Scene from "../scene/Scene";
-import { ShapeCache } from "../scene/ShapeCache";
 import { useApp, useExcalidrawContainer, useExcalidrawElements } from "./App";
+import { useStable } from "../hooks/useStable";
 
 import "./EyeDropper.scss";
+import { ColorPickerType } from "./ColorPicker/colorPickerUtils";
+import { ExcalidrawElement } from "../element/types";
 
-type EyeDropperProperties = {
+export type EyeDropperProperties = {
   keepOpenOnAlt: boolean;
   swapPreviewOnAlt?: boolean;
+  /** called when user picks color (on pointerup) */
   onSelect: (color: string, event: PointerEvent) => void;
-  previewType: "strokeColor" | "backgroundColor";
+  /**
+   * property of selected elements to update live when alt-dragging.
+   * Supply `null` if not applicable (e.g. updating the canvas bg instead of
+   * elements)
+   **/
+  colorPickerType: ColorPickerType;
 };
 
 export const activeEyeDropperAtom = atom<null | EyeDropperProperties>(null);
 
 export const EyeDropper: React.FC<{
   onCancel: () => void;
-  onSelect: Required<EyeDropperProperties>["onSelect"];
-  swapPreviewOnAlt?: EyeDropperProperties["swapPreviewOnAlt"];
-  previewType: EyeDropperProperties["previewType"];
-}> = ({ onCancel, onSelect, swapPreviewOnAlt, previewType }) => {
+  onSelect: EyeDropperProperties["onSelect"];
+  /** called when color changes, on pointerdown for preview */
+  onChange: (
+    type: ColorPickerType,
+    color: string,
+    selectedElements: ExcalidrawElement[],
+    event: { altKey: boolean },
+  ) => void;
+  colorPickerType: EyeDropperProperties["colorPickerType"];
+}> = ({ onCancel, onChange, onSelect, colorPickerType }) => {
   const eyeDropperContainer = useCreatePortalContainer({
     className: "excalidraw-eye-dropper-backdrop",
     parentSelector: ".excalidraw-eye-dropper-container",
@@ -40,9 +52,13 @@ export const EyeDropper: React.FC<{
 
   const selectedElements = getSelectedElements(elements, appState);
 
-  const metaStuffRef = useRef({ selectedElements, app });
-  metaStuffRef.current.selectedElements = selectedElements;
-  metaStuffRef.current.app = app;
+  const stableProps = useStable({
+    app,
+    onCancel,
+    onChange,
+    onSelect,
+    selectedElements,
+  });
 
   const { container: excalidrawContainer } = useExcalidrawContainer();
 
@@ -90,28 +106,28 @@ export const EyeDropper: React.FC<{
       const currentColor = getCurrentColor({ clientX, clientY });
 
       if (isHoldingPointerDown) {
-        for (const element of metaStuffRef.current.selectedElements) {
-          mutateElement(
-            element,
-            {
-              [altKey && swapPreviewOnAlt
-                ? previewType === "strokeColor"
-                  ? "backgroundColor"
-                  : "strokeColor"
-                : previewType]: currentColor,
-            },
-            false,
-          );
-          ShapeCache.delete(element);
-        }
-        Scene.getScene(
-          metaStuffRef.current.selectedElements[0],
-        )?.informMutation();
+        stableProps.onChange(
+          colorPickerType,
+          currentColor,
+          stableProps.selectedElements,
+          { altKey },
+        );
       }
 
       colorPreviewDiv.style.background = currentColor;
     };
 
+    const onCancel = () => {
+      stableProps.onCancel();
+    };
+
+    const onSelect: Required<EyeDropperProperties>["onSelect"] = (
+      color,
+      event,
+    ) => {
+      stableProps.onSelect(color, event);
+    };
+
     const pointerDownListener = (event: PointerEvent) => {
       isHoldingPointerDown = true;
       // NOTE we can't event.preventDefault() as that would stop
@@ -148,8 +164,8 @@ export const EyeDropper: React.FC<{
 
     // init color preview else it would show only after the first mouse move
     mouseMoveListener({
-      clientX: metaStuffRef.current.app.lastViewportPosition.x,
-      clientY: metaStuffRef.current.app.lastViewportPosition.y,
+      clientX: stableProps.app.lastViewportPosition.x,
+      clientY: stableProps.app.lastViewportPosition.y,
       altKey: false,
     });
 
@@ -179,12 +195,10 @@ export const EyeDropper: React.FC<{
       window.removeEventListener(EVENT.BLUR, onCancel);
     };
   }, [
+    stableProps,
     app.canvas,
     eyeDropperContainer,
-    onCancel,
-    onSelect,
-    swapPreviewOnAlt,
-    previewType,
+    colorPickerType,
     excalidrawContainer,
     appState.offsetLeft,
     appState.offsetTop,

src/components/FilledButton.scss

@@ -12,32 +12,32 @@
 
     &--color-primary {
       &.ExcButton--variant-filled {
-        --text-color: var(--input-bg-color);
+        --text-color: var(--color-surface-lowest);
         --back-color: var(--color-primary);
 
         &:hover {
-          --back-color: var(--color-primary-darker);
+          --back-color: var(--color-brand-hover);
         }
 
         &:active {
-          --back-color: var(--color-primary-darkest);
+          --back-color: var(--color-brand-active);
         }
       }
 
       &.ExcButton--variant-outlined,
       &.ExcButton--variant-icon {
         --text-color: var(--color-primary);
-        --border-color: var(--color-primary);
-        --back-color: var(--input-bg-color);
+        --border-color: var(--color-border-outline);
+        --back-color: transparent;
 
         &:hover {
-          --text-color: var(--color-primary-darker);
-          --border-color: var(--color-primary-darker);
+          --text-color: var(--color-brand-hover);
+          --border-color: var(--color-brand-hover);
         }
 
         &:active {
-          --text-color: var(--color-primary-darkest);
-          --border-color: var(--color-primary-darkest);
+          --text-color: var(--color-brand-active);
+          --border-color: var(--color-brand-active);
         }
       }
     }

src/components/HelpDialog.scss

@@ -19,20 +19,35 @@
     }
 
     &__btn {
+      --background: var(--color-surface-mid);
+
       display: flex;
       column-gap: 0.5rem;
       align-items: center;
-      border: 1px solid var(--default-border-color);
+      background-color: var(--background);
       padding: 0.625rem 1rem;
+      border: 1px solid var(--background);
       border-radius: var(--border-radius-lg);
       color: var(--text-primary-color);
       font-weight: 600;
       font-size: 0.75rem;
       letter-spacing: 0.4px;
 
+      @at-root .excalidraw.theme--dark#{&} {
+        --background: var(--color-surface-high);
+        &:hover {
+          --background: #363541;
+        }
+      }
+
       &:hover {
+        --background: var(--color-surface-high);
         text-decoration: none;
       }
+
+      &:active {
+        border-color: var(--color-primary);
+      }
     }
 
     &__link-icon {

src/components/HelpDialog.tsx

@@ -165,6 +165,7 @@ export const HelpDialog = ({ onClose }: { onClose?: () => void }) => {
               shortcuts={[KEYS.E, KEYS["0"]]}
             />
             <Shortcut label={t("toolBar.frame")} shortcuts={[KEYS.F]} />
+            <Shortcut label={t("toolBar.laser")} shortcuts={[KEYS.K]} />
             <Shortcut
               label={t("labels.eyeDropper")}
               shortcuts={[KEYS.I, "Shift+S", "Shift+G"]}
@@ -258,6 +259,10 @@ export const HelpDialog = ({ onClose }: { onClose?: () => void }) => {
               label={t("buttons.zenMode")}
               shortcuts={[getShortcutKey("Alt+Z")]}
             />
+            <Shortcut
+              label={t("buttons.objectsSnapMode")}
+              shortcuts={[getShortcutKey("Alt+S")]}
+            />
             <Shortcut
               label={t("labels.showGrid")}
               shortcuts={[getShortcutKey("CtrlOrCmd+'")]}

src/components/LaserTool/LaserPathManager.ts

@@ -0,0 +1,309 @@
+import { LaserPointer } from "@excalidraw/laser-pointer";
+
+import { sceneCoordsToViewportCoords } from "../../utils";
+import App from "../App";
+import { getClientColor } from "../../clients";
+
+// decay time in milliseconds
+const DECAY_TIME = 1000;
+// length of line in points before it starts decaying
+const DECAY_LENGTH = 50;
+
+const average = (a: number, b: number) => (a + b) / 2;
+function getSvgPathFromStroke(points: number[][], closed = true) {
+  const len = points.length;
+
+  if (len < 4) {
+    return ``;
+  }
+
+  let a = points[0];
+  let b = points[1];
+  const c = points[2];
+
+  let result = `M${a[0].toFixed(2)},${a[1].toFixed(2)} Q${b[0].toFixed(
+    2,
+  )},${b[1].toFixed(2)} ${average(b[0], c[0]).toFixed(2)},${average(
+    b[1],
+    c[1],
+  ).toFixed(2)} T`;
+
+  for (let i = 2, max = len - 1; i < max; i++) {
+    a = points[i];
+    b = points[i + 1];
+    result += `${average(a[0], b[0]).toFixed(2)},${average(a[1], b[1]).toFixed(
+      2,
+    )} `;
+  }
+
+  if (closed) {
+    result += "Z";
+  }
+
+  return result;
+}
+
+declare global {
+  interface Window {
+    LPM: LaserPathManager;
+  }
+}
+
+function easeOutCubic(t: number) {
+  return 1 - Math.pow(1 - t, 3);
+}
+
+function instantiateCollabolatorState(): CollabolatorState {
+  return {
+    currentPath: undefined,
+    finishedPaths: [],
+    lastPoint: [-10000, -10000],
+    svg: document.createElementNS("http://www.w3.org/2000/svg", "path"),
+  };
+}
+
+function instantiatePath() {
+  LaserPointer.constants.cornerDetectionMaxAngle = 70;
+
+  return new LaserPointer({
+    simplify: 0,
+    streamline: 0.4,
+    sizeMapping: (c) => {
+      const pt = DECAY_TIME;
+      const pl = DECAY_LENGTH;
+      const t = Math.max(0, 1 - (performance.now() - c.pressure) / pt);
+      const l = (pl - Math.min(pl, c.totalLength - c.currentIndex)) / pl;
+
+      return Math.min(easeOutCubic(l), easeOutCubic(t));
+    },
+  });
+}
+
+type CollabolatorState = {
+  currentPath: LaserPointer | undefined;
+  finishedPaths: LaserPointer[];
+  lastPoint: [number, number];
+  svg: SVGPathElement;
+};
+
+export class LaserPathManager {
+  private ownState: CollabolatorState;
+  private collaboratorsState: Map<string, CollabolatorState> = new Map();
+
+  private rafId: number | undefined;
+  private isDrawing = false;
+  private container: SVGSVGElement | undefined;
+
+  constructor(private app: App) {
+    this.ownState = instantiateCollabolatorState();
+  }
+
+  destroy() {
+    this.stop();
+    this.isDrawing = false;
+    this.ownState = instantiateCollabolatorState();
+    this.collaboratorsState = new Map();
+  }
+
+  startPath(x: number, y: number) {
+    this.ownState.currentPath = instantiatePath();
+    this.ownState.currentPath.addPoint([x, y, performance.now()]);
+    this.updatePath(this.ownState);
+  }
+
+  addPointToPath(x: number, y: number) {
+    if (this.ownState.currentPath) {
+      this.ownState.currentPath?.addPoint([x, y, performance.now()]);
+      this.updatePath(this.ownState);
+    }
+  }
+
+  endPath() {
+    if (this.ownState.currentPath) {
+      this.ownState.currentPath.close();
+      this.ownState.finishedPaths.push(this.ownState.currentPath);
+      this.updatePath(this.ownState);
+    }
+  }
+
+  private updatePath(state: CollabolatorState) {
+    this.isDrawing = true;
+
+    if (!this.isRunning) {
+      this.start();
+    }
+  }
+
+  private isRunning = false;
+
+  start(svg?: SVGSVGElement) {
+    if (svg) {
+      this.container = svg;
+      this.container.appendChild(this.ownState.svg);
+    }
+
+    this.stop();
+    this.isRunning = true;
+    this.loop();
+  }
+
+  stop() {
+    this.isRunning = false;
+    if (this.rafId) {
+      cancelAnimationFrame(this.rafId);
+    }
+    this.rafId = undefined;
+  }
+
+  loop() {
+    this.rafId = requestAnimationFrame(this.loop.bind(this));
+
+    this.updateCollabolatorsState();
+
+    if (this.isDrawing) {
+      this.update();
+    } else {
+      this.isRunning = false;
+    }
+  }
+
+  draw(path: LaserPointer) {
+    const stroke = path
+      .getStrokeOutline(path.options.size / this.app.state.zoom.value)
+      .map(([x, y]) => {
+        const result = sceneCoordsToViewportCoords(
+          { sceneX: x, sceneY: y },
+          this.app.state,
+        );
+
+        return [result.x, result.y];
+      });
+
+    return getSvgPathFromStroke(stroke, true);
+  }
+
+  updateCollabolatorsState() {
+    if (!this.container || !this.app.state.collaborators.size) {
+      return;
+    }
+
+    for (const [key, collabolator] of this.app.state.collaborators.entries()) {
+      if (!this.collaboratorsState.has(key)) {
+        const state = instantiateCollabolatorState();
+        this.container.appendChild(state.svg);
+        this.collaboratorsState.set(key, state);
+
+        this.updatePath(state);
+      }
+
+      const state = this.collaboratorsState.get(key)!;
+
+      if (collabolator.pointer && collabolator.pointer.tool === "laser") {
+        if (collabolator.button === "down" && state.currentPath === undefined) {
+          state.lastPoint = [collabolator.pointer.x, collabolator.pointer.y];
+          state.currentPath = instantiatePath();
+          state.currentPath.addPoint([
+            collabolator.pointer.x,
+            collabolator.pointer.y,
+            performance.now(),
+          ]);
+
+          this.updatePath(state);
+        }
+
+        if (collabolator.button === "down" && state.currentPath !== undefined) {
+          if (
+            collabolator.pointer.x !== state.lastPoint[0] ||
+            collabolator.pointer.y !== state.lastPoint[1]
+          ) {
+            state.lastPoint = [collabolator.pointer.x, collabolator.pointer.y];
+            state.currentPath.addPoint([
+              collabolator.pointer.x,
+              collabolator.pointer.y,
+              performance.now(),
+            ]);
+
+            this.updatePath(state);
+          }
+        }
+
+        if (collabolator.button === "up" && state.currentPath !== undefined) {
+          state.lastPoint = [collabolator.pointer.x, collabolator.pointer.y];
+          state.currentPath.addPoint([
+            collabolator.pointer.x,
+            collabolator.pointer.y,
+            performance.now(),
+          ]);
+          state.currentPath.close();
+
+          state.finishedPaths.push(state.currentPath);
+          state.currentPath = undefined;
+
+          this.updatePath(state);
+        }
+      }
+    }
+  }
+
+  update() {
+    if (!this.container) {
+      return;
+    }
+
+    let somePathsExist = false;
+
+    for (const [key, state] of this.collaboratorsState.entries()) {
+      if (!this.app.state.collaborators.has(key)) {
+        state.svg.remove();
+        this.collaboratorsState.delete(key);
+        continue;
+      }
+
+      state.finishedPaths = state.finishedPaths.filter((path) => {
+        const lastPoint = path.originalPoints[path.originalPoints.length - 1];
+
+        return !(lastPoint && lastPoint[2] < performance.now() - DECAY_TIME);
+      });
+
+      let paths = state.finishedPaths.map((path) => this.draw(path)).join(" ");
+
+      if (state.currentPath) {
+        paths += ` ${this.draw(state.currentPath)}`;
+      }
+
+      if (paths.trim()) {
+        somePathsExist = true;
+      }
+
+      state.svg.setAttribute("d", paths);
+      state.svg.setAttribute("fill", getClientColor(key));
+    }
+
+    this.ownState.finishedPaths = this.ownState.finishedPaths.filter((path) => {
+      const lastPoint = path.originalPoints[path.originalPoints.length - 1];
+
+      return !(lastPoint && lastPoint[2] < performance.now() - DECAY_TIME);
+    });
+
+    let paths = this.ownState.finishedPaths
+      .map((path) => this.draw(path))
+      .join(" ");
+
+    if (this.ownState.currentPath) {
+      paths += ` ${this.draw(this.ownState.currentPath)}`;
+    }
+
+    paths = paths.trim();
+
+    if (paths) {
+      somePathsExist = true;
+    }
+
+    this.ownState.svg.setAttribute("d", paths);
+    this.ownState.svg.setAttribute("fill", "red");
+
+    if (!somePathsExist) {
+      this.isDrawing = false;
+    }
+  }
+}

src/components/LaserTool/LaserPointerButton.tsx

@@ -0,0 +1,41 @@
+import "../ToolIcon.scss";
+
+import clsx from "clsx";
+import { ToolButtonSize } from "../ToolButton";
+import { laserPointerToolIcon } from "../icons";
+
+type LaserPointerIconProps = {
+  title?: string;
+  name?: string;
+  checked: boolean;
+  onChange?(): void;
+  isMobile?: boolean;
+};
+
+const DEFAULT_SIZE: ToolButtonSize = "small";
+
+export const LaserPointerButton = (props: LaserPointerIconProps) => {
+  return (
+    <label
+      className={clsx(
+        "ToolIcon ToolIcon__LaserPointer",
+        `ToolIcon_size_${DEFAULT_SIZE}`,
+        {
+          "is-mobile": props.isMobile,
+        },
+      )}
+      title={`${props.title}`}
+    >
+      <input
+        className="ToolIcon_type_checkbox"
+        type="checkbox"
+        name={props.name}
+        onChange={props.onChange}
+        checked={props.checked}
+        aria-label={props.title}
+        data-testid="toolbar-LaserPointer"
+      />
+      <div className="ToolIcon__icon">{laserPointerToolIcon}</div>
+    </label>
+  );
+};

src/components/LaserTool/LaserTool.tsx

@@ -0,0 +1,27 @@
+import { useEffect, useRef } from "react";
+import { LaserPathManager } from "./LaserPathManager";
+import "./LaserToolOverlay.scss";
+
+type LaserToolOverlayProps = {
+  manager: LaserPathManager;
+};
+
+export const LaserToolOverlay = ({ manager }: LaserToolOverlayProps) => {
+  const svgRef = useRef<SVGSVGElement | null>(null);
+
+  useEffect(() => {
+    if (svgRef.current) {
+      manager.start(svgRef.current);
+    }
+
+    return () => {
+      manager.stop();
+    };
+  }, [manager]);
+
+  return (
+    <div className="LaserToolOverlay">
+      <svg ref={svgRef} className="LaserToolOverlayCanvas" />
+    </div>
+  );
+};

src/components/LaserTool/LaserToolOverlay.scss

@@ -0,0 +1,20 @@
+.excalidraw {
+  .LaserToolOverlay {
+    pointer-events: none;
+    width: 100vw;
+    height: 100vh;
+    position: fixed;
+    top: 0;
+    left: 0;
+
+    z-index: 2;
+
+    .LaserToolOverlayCanvas {
+      image-rendering: auto;
+      overflow: visible;
+      position: absolute;
+      top: 0;
+      left: 0;
+    }
+  }
+}

src/components/LayerUI.tsx

@@ -52,6 +52,10 @@ import { EyeDropper, activeEyeDropperAtom } from "./EyeDropper";
 
 import "./LayerUI.scss";
 import "./Toolbar.scss";
+import { mutateElement } from "../element/mutateElement";
+import { ShapeCache } from "../scene/ShapeCache";
+import Scene from "../scene/Scene";
+import { LaserPointerButton } from "./LaserTool/LaserPointerButton";
 
 interface LayerUIProps {
   actionManager: ActionManager;
@@ -74,6 +78,7 @@ interface LayerUIProps {
   renderWelcomeScreen: boolean;
   children?: React.ReactNode;
   app: AppClassProperties;
+  isCollaborating: boolean;
 }
 
 const DefaultMainMenu: React.FC<{
@@ -131,6 +136,7 @@ const LayerUI = ({
   renderWelcomeScreen,
   children,
   app,
+  isCollaborating,
 }: LayerUIProps) => {
   const device = useDevice();
   const tunnels = useInitializeTunnels();
@@ -276,7 +282,7 @@ const LayerUI = ({
                             appState={appState}
                             interactiveCanvas={interactiveCanvas}
                             activeTool={appState.activeTool}
-                            setAppState={setAppState}
+                            app={app}
                             onImageAction={({ pointerType }) => {
                               onImageAction({
                                 insertOnCanvasDirectly: pointerType !== "mouse",
@@ -285,6 +291,24 @@ const LayerUI = ({
                           />
                         </Stack.Row>
                       </Island>
+                      {isCollaborating && (
+                        <Island
+                          style={{
+                            marginLeft: 8,
+                            alignSelf: "center",
+                            height: "fit-content",
+                          }}
+                        >
+                          <LaserPointerButton
+                            title={t("toolBar.laser")}
+                            checked={appState.activeTool.type === "laser"}
+                            onChange={() =>
+                              app.setActiveTool({ type: "laser" })
+                            }
+                            isMobile
+                          />
+                        </Island>
+                      )}
                     </Stack.Row>
                   </Stack.Col>
                 </div>
@@ -368,11 +392,44 @@ const LayerUI = ({
       )}
       {eyeDropperState && !device.isMobile && (
         <EyeDropper
-          swapPreviewOnAlt={eyeDropperState.swapPreviewOnAlt}
-          previewType={eyeDropperState.previewType}
+          colorPickerType={eyeDropperState.colorPickerType}
           onCancel={() => {
             setEyeDropperState(null);
           }}
+          onChange={(colorPickerType, color, selectedElements, { altKey }) => {
+            if (
+              colorPickerType !== "elementBackground" &&
+              colorPickerType !== "elementStroke"
+            ) {
+              return;
+            }
+
+            if (selectedElements.length) {
+              for (const element of selectedElements) {
+                mutateElement(
+                  element,
+                  {
+                    [altKey && eyeDropperState.swapPreviewOnAlt
+                      ? colorPickerType === "elementBackground"
+                        ? "strokeColor"
+                        : "backgroundColor"
+                      : colorPickerType === "elementBackground"
+                      ? "backgroundColor"
+                      : "strokeColor"]: color,
+                  },
+                  false,
+                );
+                ShapeCache.delete(element);
+              }
+              Scene.getScene(selectedElements[0])?.informMutation();
+            } else if (colorPickerType === "elementBackground") {
+              setAppState({
+                currentItemBackgroundColor: color,
+              });
+            } else {
+              setAppState({ currentItemStrokeColor: color });
+            }
+          }}
           onSelect={(color, event) => {
             setEyeDropperState((state) => {
               return state?.keepOpenOnAlt && event.altKey ? state : null;

src/components/LibraryMenu.scss

@@ -99,10 +99,10 @@
     font-size: 0.75rem;
 
     &:hover {
-      background-color: var(--color-primary-darker);
+      background-color: var(--color-brand-hover);
     }
     &:active {
-      background-color: var(--color-primary-darkest);
+      background-color: var(--color-brand-active);
     }
   }
 

src/components/MobileMenu.tsx

@@ -87,7 +87,7 @@ export const MobileMenu = ({
                       appState={appState}
                       interactiveCanvas={interactiveCanvas}
                       activeTool={appState.activeTool}
-                      setAppState={setAppState}
+                      app={app}
                       onImageAction={({ pointerType }) => {
                         onImageAction({
                           insertOnCanvasDirectly: pointerType !== "mouse",

src/components/RadioGroup.scss

@@ -1,27 +1,18 @@
 @import "../css/variables.module";
 
 .excalidraw {
-  --RadioGroup-background: #ffffff;
-  --RadioGroup-border: var(--color-gray-30);
+  --RadioGroup-background: var(--island-bg-color);
+  --RadioGroup-border: var(--color-surface-high);
 
   --RadioGroup-choice-color-off: var(--color-primary);
-  --RadioGroup-choice-color-off-hover: var(--color-primary-darkest);
-  --RadioGroup-choice-background-off: white;
-  --RadioGroup-choice-background-off-active: var(--color-gray-20);
+  --RadioGroup-choice-color-off-hover: var(--color-brand-hover);
+  --RadioGroup-choice-background-off: var(--island-bg-color);
+  --RadioGroup-choice-background-off-active: var(--color-surface-high);
 
-  --RadioGroup-choice-color-on: white;
+  --RadioGroup-choice-color-on: var(--color-surface-lowest);
   --RadioGroup-choice-background-on: var(--color-primary);
-  --RadioGroup-choice-background-on-hover: var(--color-primary-darker);
-  --RadioGroup-choice-background-on-active: var(--color-primary-darkest);
-
-  &.theme--dark {
-    --RadioGroup-background: var(--color-gray-85);
-    --RadioGroup-border: var(--color-gray-70);
-
-    --RadioGroup-choice-background-off: var(--color-gray-85);
-    --RadioGroup-choice-background-off-active: var(--color-gray-70);
-    --RadioGroup-choice-color-on: var(--color-gray-85);
-  }
+  --RadioGroup-choice-background-on-hover: var(--color-brand-hover);
+  --RadioGroup-choice-background-on-active: var(--color-brand-active);
 
   .RadioGroup {
     box-sizing: border-box;

src/components/Sidebar/SidebarTrigger.scss

@@ -3,8 +3,7 @@
 .excalidraw {
   .sidebar-trigger {
     @include outlineButtonStyles;
-
-    background-color: var(--island-bg-color);
+    @include filledButtonOnCanvas;
 
     width: auto;
     height: var(--lg-button-size);

src/components/Switch.scss

@@ -1,15 +1,13 @@
 @import "../css/variables.module";
 
 .excalidraw {
-  --Switch-disabled-color: #d6d6d6;
-  --Switch-track-background: white;
-  --Switch-thumb-background: #3d3d3d;
-
-  &.theme--dark {
-    --Switch-disabled-color: #5c5c5c;
-    --Switch-track-background: #242424;
-    --Switch-thumb-background: #b8b8b8;
-  }
+  --Switch-disabled-color: var(--color-border-outline);
+  --Switch-disabled-toggled-background: var(--color-border-outline-variant);
+  --Switch-disabled-border: var(--color-border-outline-variant);
+  --Switch-track-background: var(--island-bg-color);
+  --Switch-thumb-background: var(--color-on-surface);
+  --Switch-hover-background: var(--color-brand-hover);
+  --Switch-active-background: var(--color-brand-active);
 
   .Switch {
     position: relative;
@@ -28,7 +26,11 @@
 
     &:hover {
       background: var(--Switch-track-background);
-      border: 1px solid #999999;
+      border: 1px solid var(--Switch-hover-background);
+    }
+
+    &:active {
+      border: 1px solid var(--Switch-active-background);
     }
 
     &.toggled {
@@ -43,11 +45,11 @@
 
     &.disabled {
       background: var(--Switch-track-background);
-      border: 1px solid var(--Switch-disabled-color);
+      border: 1px solid var(--Switch-disabled-border);
 
       &.toggled {
-        background: var(--Switch-disabled-color);
-        border: 1px solid var(--Switch-disabled-color);
+        background: var(--Switch-disabled-toggled-background);
+        border: 1px solid var(--Switch-disabled-toggled-background);
       }
     }
 
@@ -92,7 +94,7 @@
     }
 
     &.disabled.toggled:before {
-      background: var(--color-gray-50);
+      background: var(--Switch-disabled-color);
     }
 
     & input {

src/components/TextField.scss

@@ -1,25 +1,16 @@
 @import "../css/variables.module";
 
 .excalidraw {
-  --ExcTextField--color: var(--color-gray-80);
-  --ExcTextField--label-color: var(--color-gray-80);
-  --ExcTextField--background: white;
-  --ExcTextField--readonly--background: var(--color-gray-10);
-  --ExcTextField--readonly--color: var(--color-gray-80);
-  --ExcTextField--border: var(--color-gray-40);
-  --ExcTextField--border-hover: var(--color-gray-50);
-  --ExcTextField--placeholder: var(--color-gray-40);
-
-  &.theme--dark {
-    --ExcTextField--color: var(--color-gray-10);
-    --ExcTextField--label-color: var(--color-gray-20);
-    --ExcTextField--background: var(--color-gray-85);
-    --ExcTextField--readonly--background: var(--color-gray-80);
-    --ExcTextField--readonly--color: var(--color-gray-40);
-    --ExcTextField--border: var(--color-gray-70);
-    --ExcTextField--border-hover: var(--color-gray-60);
-    --ExcTextField--placeholder: var(--color-gray-80);
-  }
+  --ExcTextField--color: var(--color-on-surface);
+  --ExcTextField--label-color: var(--color-on-surface);
+  --ExcTextField--background: transparent;
+  --ExcTextField--readonly--background: var(--color-surface-high);
+  --ExcTextField--readonly--color: var(--color-on-surface);
+  --ExcTextField--border: var(--color-border-outline);
+  --ExcTextField--readonly--border: var(--color-border-outline-variant);
+  --ExcTextField--border-hover: var(--color-brand-hover);
+  --ExcTextField--border-active: var(--color-brand-active);
+  --ExcTextField--placeholder: var(--color-border-outline-variant);
 
   .ExcTextField {
     &--fullWidth {
@@ -61,7 +52,7 @@
 
         &:active,
         &:focus-within {
-          border-color: var(--color-primary);
+          border-color: var(--ExcTextField--border-active);
         }
       }
 
@@ -107,7 +98,7 @@
 
       &--readonly {
         background: var(--ExcTextField--readonly--background);
-        border-color: transparent;
+        border-color: var(--ExcTextField--readonly--border);
 
         & input {
           color: var(--ExcTextField--readonly--color);

src/components/ToolIcon.scss

@@ -97,10 +97,6 @@
       }
     }
 
-    // &:hover {
-    //   background-color: var(--button-gray-2);
-    // }
-
     &:active {
       background-color: var(--button-gray-3);
     }
@@ -110,7 +106,6 @@
     }
 
     &--hide {
-      // visibility: hidden;
       display: none !important;
     }
   }
@@ -170,5 +165,10 @@
         height: var(--lg-icon-size);
       }
     }
+
+    .ToolIcon__LaserPointer .ToolIcon__icon {
+      width: var(--default-button-size);
+      height: var(--default-button-size);
+    }
   }
 }

src/components/Toolbar.scss

@@ -22,12 +22,19 @@
   .App-toolbar__extra-tools-trigger {
     box-shadow: none;
     border: 0;
+    background-color: transparent;
 
     &:active {
       background-color: var(--button-hover-bg);
       box-shadow: 0 0 0 1px
         var(--button-active-border, var(--color-primary-darkest)) inset;
     }
+
+    &--selected,
+    &--selected:hover {
+      background: var(--color-primary-light);
+      color: var(--color-primary);
+    }
   }
 
   .App-toolbar__extra-tools-dropdown {

src/components/canvases/InteractiveCanvas.tsx

@@ -193,6 +193,8 @@ const getRelevantAppStateProps = (
   showHyperlinkPopup: appState.showHyperlinkPopup,
   collaborators: appState.collaborators, // Necessary for collab. sessions
   activeEmbeddable: appState.activeEmbeddable,
+  snapLines: appState.snapLines,
+  zenModeEnabled: appState.zenModeEnabled,
 });
 
 const areEqual = (

src/components/canvases/StaticCanvas.tsx

@@ -114,11 +114,13 @@ const areEqual = (
     return false;
   }
 
-  return isShallowEqual(
-    // asserting AppState because we're being passed the whole AppState
-    // but resolve to only the StaticCanvas-relevant props
-    getRelevantAppStateProps(prevProps.appState as AppState),
-    getRelevantAppStateProps(nextProps.appState as AppState),
+  return (
+    isShallowEqual(
+      // asserting AppState because we're being passed the whole AppState
+      // but resolve to only the StaticCanvas-relevant props
+      getRelevantAppStateProps(prevProps.appState as AppState),
+      getRelevantAppStateProps(nextProps.appState as AppState),
+    ) && isShallowEqual(prevProps.renderConfig, nextProps.renderConfig)
   );
 };
 

src/components/dropdownMenu/DropdownMenu.scss

@@ -16,7 +16,7 @@
       .dropdown-menu-container {
         padding: 8px 8px;
         box-sizing: border-box;
-        background-color: var(--island-bg-color);
+        // background-color: var(--island-bg-color);
         box-shadow: var(--shadow-island);
         border-radius: var(--border-radius-lg);
         position: relative;
@@ -29,7 +29,7 @@
     }
 
     .dropdown-menu-container {
-      background-color: #fff !important;
+      background-color: var(--island-bg-color);
       max-height: calc(100vh - 150px);
       overflow-y: auto;
       --gap: 2;
@@ -40,7 +40,7 @@
       padding: 0 0.625rem;
       column-gap: 0.625rem;
       font-size: 0.875rem;
-      color: var(--color-gray-100);
+      color: var(--color-on-surface);
       width: 100%;
       box-sizing: border-box;
       font-weight: normal;
@@ -49,7 +49,7 @@
 
     .dropdown-menu-item {
       background-color: transparent;
-      border: 0;
+      border: 1px solid transparent;
       align-items: center;
       height: 2rem;
       cursor: pointer;
@@ -59,6 +59,11 @@
         height: 2.25rem;
       }
 
+      &--selected {
+        background: var(--color-primary-light);
+        --icon-fill-color: var(--color-primary-darker);
+      }
+
       &__text {
         text-overflow: ellipsis;
         overflow: hidden;
@@ -75,6 +80,11 @@
         text-decoration: none;
       }
 
+      &:active {
+        background-color: var(--button-hover-bg);
+        border-color: var(--color-brand-active);
+      }
+
       svg {
         width: 1rem;
         height: 1rem;
@@ -93,22 +103,33 @@
       font-weight: 500;
     }
   }
-  &.theme--dark {
-    .dropdown-menu-item {
-      color: var(--color-gray-40);
-    }
-
-    .dropdown-menu-container {
-      background-color: var(--color-gray-90) !important;
-    }
-  }
 
   .dropdown-menu-button {
     @include outlineButtonStyles;
-    background-color: var(--island-bg-color);
     width: var(--lg-button-size);
     height: var(--lg-button-size);
 
+    --background: var(--color-surface-mid);
+
+    background-color: var(--background);
+
+    @at-root .excalidraw.theme--dark#{&} {
+      --background: var(--color-surface-high);
+      &:hover {
+        --background: #363541;
+      }
+    }
+
+    &:hover {
+      --background: var(--color-surface-high);
+      background-color: var(--background);
+      text-decoration: none;
+    }
+
+    &:active {
+      border-color: var(--color-primary);
+    }
+
     svg {
       width: var(--lg-icon-size);
       height: var(--lg-icon-size);

src/components/dropdownMenu/DropdownMenuItem.tsx

@@ -11,12 +11,14 @@ const DropdownMenuItem = ({
   children,
   shortcut,
   className,
+  selected,
   ...rest
 }: {
   icon?: JSX.Element;
   onSelect: (event: Event) => void;
   children: React.ReactNode;
   shortcut?: string;
+  selected?: boolean;
   className?: string;
 } & Omit<React.ButtonHTMLAttributes<HTMLButtonElement>, "onSelect">) => {
   const handleClick = useHandleDropdownMenuItemClick(rest.onClick, onSelect);
@@ -26,7 +28,7 @@ const DropdownMenuItem = ({
       {...rest}
       onClick={handleClick}
       type="button"
-      className={getDropdownMenuItemClassName(className)}
+      className={getDropdownMenuItemClassName(className, selected)}
       title={rest.title ?? rest["aria-label"]}
     >
       <MenuItemContent icon={icon} shortcut={shortcut}>

src/components/dropdownMenu/DropdownMenuItemCustom.tsx

@@ -3,15 +3,19 @@ import React from "react";
 const DropdownMenuItemCustom = ({
   children,
   className = "",
+  selected,
   ...rest
 }: {
   children: React.ReactNode;
   className?: string;
+  selected?: boolean;
 } & React.HTMLAttributes<HTMLDivElement>) => {
   return (
     <div
       {...rest}
-      className={`dropdown-menu-item-base dropdown-menu-item-custom ${className}`.trim()}
+      className={`dropdown-menu-item-base dropdown-menu-item-custom ${className} ${
+        selected ? `dropdown-menu-item--selected` : ``
+      }`.trim()}
     >
       {children}
     </div>

src/components/dropdownMenu/DropdownMenuItemLink.tsx

@@ -12,6 +12,7 @@ const DropdownMenuItemLink = ({
   children,
   onSelect,
   className = "",
+  selected,
   ...rest
 }: {
   href: string;
@@ -19,6 +20,7 @@ const DropdownMenuItemLink = ({
   children: React.ReactNode;
   shortcut?: string;
   className?: string;
+  selected?: boolean;
   onSelect?: (event: Event) => void;
 } & React.AnchorHTMLAttributes<HTMLAnchorElement>) => {
   const handleClick = useHandleDropdownMenuItemClick(rest.onClick, onSelect);
@@ -29,7 +31,7 @@ const DropdownMenuItemLink = ({
       href={href}
       target="_blank"
       rel="noreferrer"
-      className={getDropdownMenuItemClassName(className)}
+      className={getDropdownMenuItemClassName(className, selected)}
       title={rest.title ?? rest["aria-label"]}
       onClick={handleClick}
     >

src/components/dropdownMenu/common.ts

@@ -6,8 +6,13 @@ export const DropdownMenuContentPropsContext = React.createContext<{
   onSelect?: (event: Event) => void;
 }>({});
 
-export const getDropdownMenuItemClassName = (className = "") => {
-  return `dropdown-menu-item dropdown-menu-item-base ${className}`.trim();
+export const getDropdownMenuItemClassName = (
+  className = "",
+  selected = false,
+) => {
+  return `dropdown-menu-item dropdown-menu-item-base ${className} ${
+    selected ? "dropdown-menu-item--selected" : ""
+  }`.trim();
 };
 
 export const useHandleDropdownMenuItemClick = (

src/components/icons.tsx

@@ -13,7 +13,7 @@ import clsx from "clsx";
 import { Theme } from "../element/types";
 import { THEME } from "../constants";
 
-const iconFillColor = (theme: Theme) => "var(--icon-fill-color)";
+export const iconFillColor = (theme: Theme) => "var(--icon-fill-color)";
 
 const handlerColor = (theme: Theme) =>
   theme === THEME.LIGHT ? oc.white : "#1e1e1e";
@@ -1653,3 +1653,22 @@ export const frameToolIcon = createIcon(
   </g>,
   tablerIconProps,
 );
+
+export const laserPointerToolIcon = createIcon(
+  <g
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="1.25"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+    transform="rotate(90 10 10)"
+  >
+    <path
+      clipRule="evenodd"
+      d="m9.644 13.69 7.774-7.773a2.357 2.357 0 0 0-3.334-3.334l-7.773 7.774L8 12l1.643 1.69Z"
+    />
+    <path d="m13.25 3.417 3.333 3.333M10 10l2-2M5 15l3-3M2.156 17.894l1-1M5.453 19.029l-.144-1.407M2.377 11.887l.866 1.118M8.354 17.273l-1.194-.758M.953 14.652l1.408.13" />
+  </g>,
+
+  20,
+);

src/components/live-collaboration/LiveCollaborationTrigger.scss

@@ -14,6 +14,8 @@
 
     --button-active-bg: var(--color-primary-darker);
 
+    box-shadow: 0 0 0 1px var(--color-surface-lowest);
+
     flex-shrink: 0;
 
     // double .active to force specificity

src/components/main-menu/MainMenu.tsx

@@ -43,6 +43,7 @@ const MainMenu = Object.assign(
                 });
               }}
               data-testid="main-menu-trigger"
+              className="main-menu-trigger"
             >
               {HamburgerMenuIcon}
             </DropdownMenu.Trigger>

src/components/welcome-screen/WelcomeScreen.scss

@@ -174,7 +174,7 @@
     justify-content: space-between;
 
     background: none;
-    border: none;
+    border: 1px solid transparent;
 
     padding: 0.75rem;
 
@@ -204,7 +204,7 @@
 
   .welcome-screen-menu-item:hover {
     text-decoration: none;
-    background: var(--color-gray-10);
+    background: var(--button-hover-bg);
 
     .welcome-screen-menu-item__shortcut {
       color: var(--color-gray-50);
@@ -216,7 +216,8 @@
   }
 
   .welcome-screen-menu-item:active {
-    background: var(--color-gray-20);
+    background: var(--button-hover-bg);
+    border-color: var(--color-brand-active);
 
     .welcome-screen-menu-item__shortcut {
       color: var(--color-gray-50);
@@ -247,8 +248,7 @@
     }
 
     .welcome-screen-menu-item:hover {
-      background: var(--color-gray-85);
-
+      background-color: var(--color-surface-low);
       .welcome-screen-menu-item__shortcut {
         color: var(--color-gray-50);
       }
@@ -259,7 +259,6 @@
     }
 
     .welcome-screen-menu-item:active {
-      background-color: var(--color-gray-90);
       .welcome-screen-menu-item__text {
         color: var(--color-gray-10);
       }

src/css/styles.scss

@@ -444,13 +444,14 @@
     }
 
     &:active {
-      border: 1px solid var(--color-primary-darkest);
+      border: 1px solid var(--button-active-border);
     }
   }
 
   .help-icon {
     @include outlineButtonStyles;
-    background-color: var(--island-bg-color);
+    @include filledButtonOnCanvas;
+
     width: var(--lg-button-size);
     height: var(--lg-button-size);
 
@@ -621,6 +622,20 @@
       padding: 0;
     }
   }
+
+  .main-menu-trigger {
+    @include filledButtonOnCanvas;
+  }
+
+  .App-menu__left {
+    --button-border: transparent;
+    --button-bg: var(--color-surface-mid);
+
+    @at-root .excalidraw.theme--dark#{&} {
+      --button-hover-bg: #363541;
+      --button-bg: var(--color-surface-high);
+    }
+  }
 }
 
 .ErrorSplash.excalidraw {

src/css/theme.scss

@@ -12,27 +12,30 @@
   --dialog-border-color: var(--color-gray-20);
   --dropdown-icon: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="292.4" height="292.4" viewBox="0 0 292 292"><path d="M287 197L159 69c-4-3-8-5-13-5s-9 2-13 5L5 197c-3 4-5 8-5 13s2 9 5 13c4 4 8 5 13 5h256c5 0 9-1 13-5s5-8 5-13-1-9-5-13z"/></svg>');
   --focus-highlight-color: #{$oc-blue-2};
-  --icon-fill-color: var(--color-gray-80);
+  --icon-fill-color: var(--color-on-surface);
   --icon-green-fill-color: #{$oc-green-9};
   --default-bg-color: #{$oc-white};
   --input-bg-color: #{$oc-white};
   --input-border-color: #{$oc-gray-4};
   --input-hover-bg-color: #{$oc-gray-1};
   --input-label-color: #{$oc-gray-7};
-  --island-bg-color: rgba(255, 255, 255, 0.96);
+  --island-bg-color: #ffffff;
   --keybinding-color: var(--color-gray-40);
   --link-color: #{$oc-blue-7};
   --overlay-bg-color: #{transparentize($oc-white, 0.12)};
-  --popup-bg-color: #{$oc-white};
+  --popup-bg-color: var(--island-bg-color);
   --popup-secondary-bg-color: #{$oc-gray-1};
   --popup-text-color: #{$oc-black};
   --popup-text-inverted-color: #{$oc-white};
   --select-highlight-color: #{$oc-blue-5};
-  --shadow-island: 0px 7px 14px rgba(0, 0, 0, 0.05),
-    0px 0px 3.12708px rgba(0, 0, 0, 0.0798),
-    0px 0px 0.931014px rgba(0, 0, 0, 0.1702);
-  --button-hover-bg: var(--color-gray-10);
-  --default-border-color: var(--color-gray-30);
+  --shadow-island: 0px 0px 0.9310142993927002px 0px rgba(0, 0, 0, 0.17),
+    0px 0px 3.1270833015441895px 0px rgba(0, 0, 0, 0.08),
+    0px 7px 14px 0px rgba(0, 0, 0, 0.05);
+
+  --button-hover-bg: var(--color-surface-high);
+  --button-active-bg: var(--color-surface-high);
+  --button-active-border: var(--color-brand-active);
+  --default-border-color: var(--color-surface-high);
 
   --default-button-size: 2rem;
   --default-icon-size: 1rem;
@@ -63,14 +66,14 @@
     0px 12.5216px 10.0172px rgba(0, 0, 0, 0.035),
     0px 6.6501px 5.32008px rgba(0, 0, 0, 0.0282725),
     0px 2.76726px 2.21381px rgba(0, 0, 0, 0.0196802);
-  --sidebar-border-color: var(--color-gray-20);
-  --sidebar-bg-color: #fff;
+  --sidebar-border-color: var(--color-surface-high);
+  --sidebar-bg-color: var(--island-bg-color);
   --library-dropdown-shadow: 0px 15px 6px rgba(0, 0, 0, 0.01),
     0px 8px 5px rgba(0, 0, 0, 0.05), 0px 4px 4px rgba(0, 0, 0, 0.09),
     0px 1px 2px rgba(0, 0, 0, 0.1), 0px 0px 0px rgba(0, 0, 0, 0.1);
 
   --space-factor: 0.25rem;
-  --text-primary-color: var(--color-gray-80);
+  --text-primary-color: var(--color-on-surface);
 
   --color-selection: #6965db;
 
@@ -132,6 +135,19 @@
   --border-radius-md: 0.375rem;
   --border-radius-lg: 0.5rem;
 
+  --color-surface-high: hsl(244, 100%, 97%);
+  --color-surface-mid: hsl(240 25% 96%);
+  --color-surface-low: hsl(240 25% 94%);
+  --color-surface-lowest: #ffffff;
+  --color-on-surface: #1b1b1f;
+  --color-brand-hover: #5753d0;
+  --color-on-primary-container: #030064;
+  --color-surface-primary-container: #e0dfff;
+  --color-brand-active: #4440bf;
+  --color-border-outline: #767680;
+  --color-border-outline-variant: #c5c5d0;
+  --color-surface-primary-container: #e0dfff;
+
   &.theme--dark {
     &.theme--dark-background-none {
       background: none;
@@ -150,29 +166,24 @@
     --dialog-border-color: var(--color-gray-80);
     --dropdown-icon: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="292.4" height="292.4" viewBox="0 0 292 292"><path fill="%23ced4da" d="M287 197L159 69c-4-3-8-5-13-5s-9 2-13 5L5 197c-3 4-5 8-5 13s2 9 5 13c4 4 8 5 13 5h256c5 0 9-1 13-5s5-8 5-13-1-9-5-13z"/></svg>');
     --focus-highlight-color: #{$oc-blue-6};
-    --icon-fill-color: var(--color-gray-40);
     --icon-green-fill-color: #{$oc-green-4};
     --default-bg-color: #121212;
     --input-bg-color: #121212;
     --input-border-color: #2e2e2e;
     --input-hover-bg-color: #181818;
     --input-label-color: #{$oc-gray-2};
-    --island-bg-color: #262627;
+    --island-bg-color: #232329;
     --keybinding-color: var(--color-gray-60);
     --link-color: #{$oc-blue-4};
     --overlay-bg-color: #{transparentize($oc-gray-8, 0.88)};
-    --popup-bg-color: #2c2c2c;
     --popup-secondary-bg-color: #222;
     --popup-text-color: #{$oc-gray-4};
     --popup-text-inverted-color: #2c2c2c;
     --select-highlight-color: #{$oc-blue-4};
-    --text-primary-color: var(--color-gray-40);
-    --button-hover-bg: var(--color-gray-80);
-    --default-border-color: var(--color-gray-80);
-    --shadow-island: 0px 13px 33px rgba(0, 0, 0, 0.07),
-      0px 4.13px 9.94853px rgba(0, 0, 0, 0.0456112),
-      0px 1.13px 4.13211px rgba(0, 0, 0, 0.035),
-      0px 0.769896px 1.4945px rgba(0, 0, 0, 0.0243888);
+    --shadow-island: 0px 0px 0.9310142993927002px 0px rgba(0, 0, 0, 0.17),
+      0px 0px 3.1270833015441895px 0px rgba(0, 0, 0, 0.08),
+      0px 7px 14px 0px rgba(0, 0, 0, 0.05);
+
     --modal-shadow: 0px 100px 80px rgba(0, 0, 0, 0.07),
       0px 41.7776px 33.4221px rgba(0, 0, 0, 0.0503198),
       0px 22.3363px 17.869px rgba(0, 0, 0, 0.0417275),
@@ -180,8 +191,6 @@
       0px 6.6501px 5.32008px rgba(0, 0, 0, 0.0282725),
       0px 2.76726px 2.21381px rgba(0, 0, 0, 0.0196802);
     --avatar-border-color: var(--color-gray-85);
-    --sidebar-border-color: var(--color-gray-85);
-    --sidebar-bg-color: #191919;
 
     --scrollbar-thumb: #{$oc-gray-8};
     --scrollbar-thumb-hover: #{$oc-gray-7};
@@ -224,5 +233,18 @@
     --color-promo: #d297ff;
 
     --color-logo-text: #e2dfff;
+
+    --color-surface-high: hsl(245, 10%, 21%);
+    --color-surface-low: hsl(240, 8%, 15%);
+    --color-surface-mid: hsl(240 6% 10%);
+    --color-surface-lowest: hsl(0, 0%, 7%);
+    --color-on-surface: #e3e3e8;
+    --color-brand-hover: #bbb8ff;
+    --color-on-primary-container: #e0dfff;
+    --color-surface-primary-container: #403e6a;
+    --color-brand-active: #d0ccff;
+    --color-border-outline: #8e8d9c;
+    --color-border-outline-variant: #46464f;
+    --color-surface-primary-container: #403e6a;
   }
 }

src/css/variables.module.scss

@@ -11,7 +11,7 @@
     .ToolIcon_type_radio,
     .ToolIcon_type_checkbox {
       &:checked + .ToolIcon__icon {
-        --icon-fill-color: var(--color-primary-darker);
+        --icon-fill-color: var(--color-on-primary-container);
 
         svg {
           fill: var(--icon-fill-color);
@@ -23,11 +23,11 @@
   .ToolIcon_type_radio,
   .ToolIcon_type_checkbox {
     &:checked + .ToolIcon__icon {
-      background: var(--color-primary-light);
-      --keybinding-color: var(--color-gray-60);
+      background: var(--color-surface-primary-container);
+      --keybinding-color: var(--color-on-primary-container);
 
       svg {
-        color: var(--color-primary-darker);
+        color: var(--color-on-primary-container);
       }
     }
   }
@@ -44,7 +44,11 @@
 
     &:active {
       background: var(--button-hover-bg);
-      border: 1px solid var(--color-primary-darkest);
+      border: 1px solid var(--button-active-border);
+
+      svg {
+        color: var(--color-on-primary-container);
+      }
     }
   }
 }
@@ -63,7 +67,7 @@
   border-radius: var(--border-radius-lg);
   cursor: pointer;
   background-color: var(--button-bg, var(--island-bg-color));
-  color: var(--button-color, var(--text-primary-color));
+  color: var(--button-color, var(--color-on-surface));
 
   svg {
     width: var(--button-width, var(--lg-icon-size));
@@ -88,22 +92,38 @@
   }
 
   &.active {
-    background-color: var(--button-selected-bg, var(--color-primary-light));
-    border-color: var(--button-selected-border, var(--color-primary-light));
+    background-color: var(
+      --button-selected-bg,
+      var(--color-surface-primary-container)
+    );
+    border-color: var(
+      --button-selected-border,
+      var(--color-surface-primary-container)
+    );
 
     &:hover {
       background-color: var(
         --button-selected-hover-bg,
-        var(--color-primary-light)
+        var(--color-surface-primary-container)
       );
     }
 
     svg {
-      color: var(--button-color, var(--color-primary-darker));
+      color: var(--button-color, var(--color-on-primary-container));
     }
   }
 }
 
+@mixin filledButtonOnCanvas {
+  border: none;
+  box-shadow: 0 0 0 1px var(--color-surface-lowest);
+  background-color: var(--color-surface-low);
+
+  &:active {
+    box-shadow: 0 0 0 1px var(--color-brand-active);
+  }
+}
+
 $theme-filter: "invert(93%) hue-rotate(180deg)";
 $right-sidebar-width: "302px";
 

src/cursor.ts

@@ -0,0 +1,103 @@
+import { CURSOR_TYPE, MIME_TYPES, THEME } from "./constants";
+import OpenColor from "open-color";
+import { AppState, DataURL } from "./types";
+import { isHandToolActive, isEraserActive } from "./appState";
+
+const laserPointerCursorSVG_tag = `<svg viewBox="0 0 24 24" stroke-width="1" width="28" height="28" xmlns="http://www.w3.org/2000/svg">`;
+const laserPointerCursorBackgroundSVG = `<path d="M6.164 11.755a5.314 5.314 0 0 1-4.932-5.298 5.314 5.314 0 0 1 5.311-5.311 5.314 5.314 0 0 1 5.307 5.113l8.773 8.773a3.322 3.322 0 0 1 0 4.696l-.895.895a3.322 3.322 0 0 1-4.696 0l-8.868-8.868Z" style="fill:#fff"/>`;
+const laserPointerCursorIconSVG = `<path stroke="#1b1b1f" fill="#fff" d="m7.868 11.113 7.773 7.774a2.359 2.359 0 0 0 1.667.691 2.368 2.368 0 0 0 2.357-2.358c0-.625-.248-1.225-.69-1.667L11.201 7.78 9.558 9.469l-1.69 1.643v.001Zm10.273 3.606-3.333 3.333m-3.25-6.583 2 2m-7-7 3 3M3.664 3.625l1 1M2.529 6.922l1.407-.144m5.735-2.932-1.118.866M4.285 9.823l.758-1.194m1.863-6.207-.13 1.408"/>`;
+
+const laserPointerCursorDataURL_lightMode = `data:${
+  MIME_TYPES.svg
+},${encodeURIComponent(
+  `${laserPointerCursorSVG_tag}${laserPointerCursorIconSVG}</svg>`,
+)}`;
+const laserPointerCursorDataURL_darkMode = `data:${
+  MIME_TYPES.svg
+},${encodeURIComponent(
+  `${laserPointerCursorSVG_tag}${laserPointerCursorBackgroundSVG}${laserPointerCursorIconSVG}</svg>`,
+)}`;
+
+export const resetCursor = (interactiveCanvas: HTMLCanvasElement | null) => {
+  if (interactiveCanvas) {
+    interactiveCanvas.style.cursor = "";
+  }
+};
+
+export const setCursor = (
+  interactiveCanvas: HTMLCanvasElement | null,
+  cursor: string,
+) => {
+  if (interactiveCanvas) {
+    interactiveCanvas.style.cursor = cursor;
+  }
+};
+
+let eraserCanvasCache: any;
+let previewDataURL: string;
+export const setEraserCursor = (
+  interactiveCanvas: HTMLCanvasElement | null,
+  theme: AppState["theme"],
+) => {
+  const cursorImageSizePx = 20;
+
+  const drawCanvas = () => {
+    const isDarkTheme = theme === THEME.DARK;
+    eraserCanvasCache = document.createElement("canvas");
+    eraserCanvasCache.theme = theme;
+    eraserCanvasCache.height = cursorImageSizePx;
+    eraserCanvasCache.width = cursorImageSizePx;
+    const context = eraserCanvasCache.getContext("2d")!;
+    context.lineWidth = 1;
+    context.beginPath();
+    context.arc(
+      eraserCanvasCache.width / 2,
+      eraserCanvasCache.height / 2,
+      5,
+      0,
+      2 * Math.PI,
+    );
+    context.fillStyle = isDarkTheme ? OpenColor.black : OpenColor.white;
+    context.fill();
+    context.strokeStyle = isDarkTheme ? OpenColor.white : OpenColor.black;
+    context.stroke();
+    previewDataURL = eraserCanvasCache.toDataURL(MIME_TYPES.svg) as DataURL;
+  };
+  if (!eraserCanvasCache || eraserCanvasCache.theme !== theme) {
+    drawCanvas();
+  }
+
+  setCursor(
+    interactiveCanvas,
+    `url(${previewDataURL}) ${cursorImageSizePx / 2} ${
+      cursorImageSizePx / 2
+    }, auto`,
+  );
+};
+
+export const setCursorForShape = (
+  interactiveCanvas: HTMLCanvasElement | null,
+  appState: Pick<AppState, "activeTool" | "theme">,
+) => {
+  if (!interactiveCanvas) {
+    return;
+  }
+  if (appState.activeTool.type === "selection") {
+    resetCursor(interactiveCanvas);
+  } else if (isHandToolActive(appState)) {
+    interactiveCanvas.style.cursor = CURSOR_TYPE.GRAB;
+  } else if (isEraserActive(appState)) {
+    setEraserCursor(interactiveCanvas, appState.theme);
+    // do nothing if image tool is selected which suggests there's
+    // a image-preview set as the cursor
+    // Ignore custom type as well and let host decide
+  } else if (appState.activeTool.type === "laser") {
+    const url =
+      appState.theme === THEME.LIGHT
+        ? laserPointerCursorDataURL_lightMode
+        : laserPointerCursorDataURL_darkMode;
+    interactiveCanvas.style.cursor = `url(${url}), auto`;
+  } else if (!["image", "custom"].includes(appState.activeTool.type)) {
+    interactiveCanvas.style.cursor = CURSOR_TYPE.CROSSHAIR;
+  }
+};

src/data/restore.ts

@@ -34,13 +34,13 @@ import {
 import { getDefaultAppState } from "../appState";
 import { LinearElementEditor } from "../element/linearElementEditor";
 import { bumpVersion } from "../element/mutateElement";
-import { getFontString, getUpdatedTimestamp, updateActiveTool } from "../utils";
+import { getUpdatedTimestamp, updateActiveTool } from "../utils";
 import { arrayToMap } from "../utils";
 import { MarkOptional, Mutable } from "../utility-types";
 import {
   detectLineHeight,
   getDefaultLineHeight,
-  measureBaseline,
+  measureTextElement,
 } from "../element/textElement";
 import { normalizeLink } from "./url";
 
@@ -67,6 +67,7 @@ export const AllowedExcalidrawActiveTools: Record<
   frame: true,
   embeddable: true,
   hand: true,
+  laser: false,
 };
 
 export type RestoredDataState = {
@@ -92,7 +93,8 @@ const repairBinding = (binding: PointBinding | null) => {
 };
 
 const restoreElementWithProperties = <
-  T extends Required<Omit<ExcalidrawElement, "customData">> & {
+  T extends Required<Omit<ExcalidrawElement, "subtype" | "customData">> & {
+    subtype?: ExcalidrawElement["subtype"];
     customData?: ExcalidrawElement["customData"];
     /** @deprecated */
     boundElementIds?: readonly ExcalidrawElement["id"][];
@@ -158,6 +160,9 @@ const restoreElementWithProperties = <
     locked: element.locked ?? false,
   };
 
+  if ("subtype" in element) {
+    base.subtype = element.subtype;
+  }
   if ("customData" in element) {
     base.customData = element.customData;
   }
@@ -188,7 +193,7 @@ const restoreElement = (
         fontSize = parseFloat(fontPx);
         fontFamily = getFontFamilyByName(_fontFamily);
       }
-      const text = element.text ?? "";
+      const text = (typeof element.text === "string" && element.text) || "";
 
       // line-height might not be specified either when creating elements
       // programmatically, or when importing old diagrams.
@@ -203,11 +208,7 @@ const restoreElement = (
           : // no element height likely means programmatic use, so default
             // to a fixed line height
             getDefaultLineHeight(element.fontFamily));
-      const baseline = measureBaseline(
-        element.text,
-        getFontString(element),
-        lineHeight,
-      );
+      const baseline = measureTextElement(element, { text }).baseline;
       element = restoreElementWithProperties(element, {
         fontSize,
         fontFamily,
@@ -221,9 +222,17 @@ const restoreElement = (
         baseline,
       });
 
+      // if empty text, mark as deleted. We keep in array
+      // for data integrity purposes (collab etc.)
+      if (!text && !element.isDeleted) {
+        element = { ...element, originalText: text, isDeleted: true };
+        element = bumpVersion(element);
+      }
+
       if (refreshDimensions) {
         element = { ...element, ...refreshTextDimensions(element) };
       }
+
       return element;
     case "freedraw": {
       return restoreElementWithProperties(element, {
@@ -298,6 +307,7 @@ const restoreElement = (
     // We also don't want to throw, but instead return void so we filter
     // out these unsupported elements from the restored array.
   }
+  return null;
 };
 
 /**

src/element/bounds.ts

@@ -158,7 +158,7 @@ export const getElementAbsoluteCoords = (
   ];
 };
 
-/**
+/*
  * for a given element, `getElementLineSegments` returns line segments
  * that can be used for visual collision detection (useful for frames)
  * as opposed to bounding box collision detection
@@ -674,6 +674,19 @@ export const getCommonBounds = (
   return [minX, minY, maxX, maxY];
 };
 
+export const getDraggedElementsBounds = (
+  elements: ExcalidrawElement[],
+  dragOffset: { x: number; y: number },
+) => {
+  const [minX, minY, maxX, maxY] = getCommonBounds(elements);
+  return [
+    minX + dragOffset.x,
+    minY + dragOffset.y,
+    maxX + dragOffset.x,
+    maxY + dragOffset.y,
+  ];
+};
+
 export const getResizedElementAbsoluteCoords = (
   element: ExcalidrawElement,
   nextWidth: number,

src/element/dragElements.ts

@@ -6,23 +6,22 @@ import { NonDeletedExcalidrawElement } from "./types";
 import { AppState, PointerDownState } from "../types";
 import { getBoundTextElement } from "./textElement";
 import { isSelectedViaGroup } from "../groups";
+import { getGridPoint } from "../math";
 import Scene from "../scene/Scene";
 import { isFrameElement } from "./typeChecks";
 
 export const dragSelectedElements = (
   pointerDownState: PointerDownState,
   selectedElements: NonDeletedExcalidrawElement[],
-  pointerX: number,
-  pointerY: number,
-  lockDirection: boolean = false,
-  distanceX: number = 0,
-  distanceY: number = 0,
+  offset: { x: number; y: number },
   appState: AppState,
   scene: Scene,
+  snapOffset: {
+    x: number;
+    y: number;
+  },
+  gridSize: AppState["gridSize"],
 ) => {
-  const [x1, y1] = getCommonBounds(selectedElements);
-  const offset = { x: pointerX - x1, y: pointerY - y1 };
-
   // we do not want a frame and its elements to be selected at the same time
   // but when it happens (due to some bug), we want to avoid updating element
   // in the frame twice, hence the use of set
@@ -44,12 +43,11 @@ export const dragSelectedElements = (
 
   elementsToUpdate.forEach((element) => {
     updateElementCoords(
-      lockDirection,
-      distanceX,
-      distanceY,
       pointerDownState,
       element,
       offset,
+      snapOffset,
+      gridSize,
     );
     // update coords of bound text only if we're dragging the container directly
     // (we don't drag the group that it's part of)
@@ -69,12 +67,11 @@ export const dragSelectedElements = (
         (!textElement.frameId || !frames.includes(textElement.frameId))
       ) {
         updateElementCoords(
-          lockDirection,
-          distanceX,
-          distanceY,
           pointerDownState,
           textElement,
           offset,
+          snapOffset,
+          gridSize,
         );
       }
     }
@@ -85,31 +82,40 @@ export const dragSelectedElements = (
 };
 
 const updateElementCoords = (
-  lockDirection: boolean,
-  distanceX: number,
-  distanceY: number,
   pointerDownState: PointerDownState,
   element: NonDeletedExcalidrawElement,
-  offset: { x: number; y: number },
+  dragOffset: { x: number; y: number },
+  snapOffset: { x: number; y: number },
+  gridSize: AppState["gridSize"],
 ) => {
-  let x: number;
-  let y: number;
-  if (lockDirection) {
-    const lockX = lockDirection && distanceX < distanceY;
-    const lockY = lockDirection && distanceX > distanceY;
-    const original = pointerDownState.originalElements.get(element.id);
-    x = lockX && original ? original.x : element.x + offset.x;
-    y = lockY && original ? original.y : element.y + offset.y;
-  } else {
-    x = element.x + offset.x;
-    y = element.y + offset.y;
+  const originalElement =
+    pointerDownState.originalElements.get(element.id) ?? element;
+
+  let nextX = originalElement.x + dragOffset.x + snapOffset.x;
+  let nextY = originalElement.y + dragOffset.y + snapOffset.y;
+
+  if (snapOffset.x === 0 || snapOffset.y === 0) {
+    const [nextGridX, nextGridY] = getGridPoint(
+      originalElement.x + dragOffset.x,
+      originalElement.y + dragOffset.y,
+      gridSize,
+    );
+
+    if (snapOffset.x === 0) {
+      nextX = nextGridX;
+    }
+
+    if (snapOffset.y === 0) {
+      nextY = nextGridY;
+    }
   }
 
   mutateElement(element, {
-    x,
-    y,
+    x: nextX,
+    y: nextY,
   });
 };
+
 export const getDragOffsetXY = (
   selectedElements: NonDeletedExcalidrawElement[],
   x: number,
@@ -133,6 +139,10 @@ export const dragNewElement = (
   /** whether to keep given aspect ratio when `isResizeWithSidesSameLength` is
       true */
   widthAspectRatio?: number | null,
+  originOffset: {
+    x: number;
+    y: number;
+  } | null = null,
 ) => {
   if (shouldMaintainAspectRatio && draggingElement.type !== "selection") {
     if (widthAspectRatio) {
@@ -173,8 +183,8 @@ export const dragNewElement = (
 
   if (width !== 0 && height !== 0) {
     mutateElement(draggingElement, {
-      x: newX,
-      y: newY,
+      x: newX + (originOffset?.x ?? 0),
+      y: newY + (originOffset?.y ?? 0),
       width,
       height,
     });

src/element/embeddable.ts

@@ -2,7 +2,8 @@ import { register } from "../actions/register";
 import { FONT_FAMILY, VERTICAL_ALIGN } from "../constants";
 import { t } from "../i18n";
 import { ExcalidrawProps } from "../types";
-import { getFontString, setCursorForShape, updateActiveTool } from "../utils";
+import { getFontString, updateActiveTool } from "../utils";
+import { setCursorForShape } from "../cursor";
 import { newTextElement } from "./newElement";
 import { getContainerElement, wrapText } from "./textElement";
 import { isEmbeddableElement } from "./typeChecks";

src/element/mutateElement.ts

@@ -6,12 +6,21 @@ import { Point } from "../types";
 import { getUpdatedTimestamp } from "../utils";
 import { Mutable } from "../utility-types";
 import { ShapeCache } from "../scene/ShapeCache";
+import { getSubtypeMethods } from "./subtypes";
 
 type ElementUpdate<TElement extends ExcalidrawElement> = Omit<
   Partial<TElement>,
   "id" | "version" | "versionNonce"
 >;
 
+const cleanUpdates = <TElement extends Mutable<ExcalidrawElement>>(
+  element: TElement,
+  updates: ElementUpdate<TElement>,
+): ElementUpdate<TElement> => {
+  const map = getSubtypeMethods(element.subtype);
+  return map?.clean ? (map.clean(updates) as typeof updates) : updates;
+};
+
 // This function tracks updates of text elements for the purposes for collaboration.
 // The version is used to compare updates when more than one user is working in
 // the same drawing. Note: this will trigger the component to update. Make sure you
@@ -22,6 +31,8 @@ export const mutateElement = <TElement extends Mutable<ExcalidrawElement>>(
   informMutation = true,
 ): TElement => {
   let didChange = false;
+  let increment = false;
+  const oldUpdates = cleanUpdates(element, updates);
 
   // casting to any because can't use `in` operator
   // (see https://github.com/microsoft/TypeScript/issues/21732)
@@ -70,6 +81,7 @@ export const mutateElement = <TElement extends Mutable<ExcalidrawElement>>(
             }
           }
           if (!didChangePoints) {
+            key in oldUpdates && (increment = true);
             continue;
           }
         }
@@ -77,6 +89,7 @@ export const mutateElement = <TElement extends Mutable<ExcalidrawElement>>(
 
       (element as any)[key] = value;
       didChange = true;
+      key in oldUpdates && (increment = true);
     }
   }
   if (!didChange) {
@@ -92,9 +105,11 @@ export const mutateElement = <TElement extends Mutable<ExcalidrawElement>>(
     ShapeCache.delete(element);
   }
 
-  element.version++;
-  element.versionNonce = randomInteger();
-  element.updated = getUpdatedTimestamp();
+  if (increment) {
+    element.version++;
+    element.versionNonce = randomInteger();
+    element.updated = getUpdatedTimestamp();
+  }
 
   if (informMutation) {
     Scene.getScene(element)?.informMutation();
@@ -108,6 +123,8 @@ export const newElementWith = <TElement extends ExcalidrawElement>(
   updates: ElementUpdate<TElement>,
 ): TElement => {
   let didChange = false;
+  let increment = false;
+  const oldUpdates = cleanUpdates(element, updates);
   for (const key in updates) {
     const value = (updates as any)[key];
     if (typeof value !== "undefined") {
@@ -119,6 +136,7 @@ export const newElementWith = <TElement extends ExcalidrawElement>(
         continue;
       }
       didChange = true;
+      key in oldUpdates && (increment = true);
     }
   }
 
@@ -126,6 +144,9 @@ export const newElementWith = <TElement extends ExcalidrawElement>(
     return element;
   }
 
+  if (!increment) {
+    return { ...element, ...updates };
+  }
   return {
     ...element,
     ...updates,
@@ -140,8 +161,8 @@ export const newElementWith = <TElement extends ExcalidrawElement>(
  *
  * NOTE: does not trigger re-render.
  */
-export const bumpVersion = (
-  element: Mutable<ExcalidrawElement>,
+export const bumpVersion = <T extends Mutable<ExcalidrawElement>>(
+  element: T,
   version?: ExcalidrawElement["version"],
 ) => {
   element.version = (version ?? element.version) + 1;

src/element/newElement.test.ts

@@ -203,7 +203,6 @@ describe("duplicating multiple elements", () => {
     );
 
     clonedArrows.forEach((arrow) => {
-      // console.log(arrow);
       expect(
         clonedRectangle.boundElements!.find((e) => e.id === arrow.id),
       ).toEqual(

src/element/newElement.ts

@@ -15,12 +15,7 @@ import {
   ExcalidrawFrameElement,
   ExcalidrawEmbeddableElement,
 } from "../element/types";
-import {
-  arrayToMap,
-  getFontString,
-  getUpdatedTimestamp,
-  isTestEnv,
-} from "../utils";
+import { arrayToMap, getUpdatedTimestamp, isTestEnv } from "../utils";
 import { randomInteger, randomId } from "../random";
 import { bumpVersion, newElementWith } from "./mutateElement";
 import { getNewGroupIdsForDuplication } from "../groups";
@@ -30,9 +25,9 @@ import { adjustXYWithRotation } from "../math";
 import { getResizedElementAbsoluteCoords } from "./bounds";
 import {
   getContainerElement,
-  measureText,
+  measureTextElement,
   normalizeText,
-  wrapText,
+  wrapTextElement,
   getBoundTextMaxWidth,
   getDefaultLineHeight,
 } from "./textElement";
@@ -45,6 +40,21 @@ import {
   VERTICAL_ALIGN,
 } from "../constants";
 import { MarkOptional, Merge, Mutable } from "../utility-types";
+import { getSubtypeMethods } from "./subtypes";
+
+export const maybeGetSubtypeProps = (obj: {
+  subtype?: ExcalidrawElement["subtype"];
+  customData?: ExcalidrawElement["customData"];
+}) => {
+  const data: typeof obj = {};
+  if ("subtype" in obj && obj.subtype !== undefined) {
+    data.subtype = obj.subtype;
+  }
+  if ("customData" in obj && obj.customData !== undefined) {
+    data.customData = obj.customData;
+  }
+  return data as typeof obj;
+};
 
 export type ElementConstructorOpts = MarkOptional<
   Omit<ExcalidrawGenericElement, "id" | "type" | "isDeleted" | "updated">,
@@ -58,6 +68,8 @@ export type ElementConstructorOpts = MarkOptional<
   | "version"
   | "versionNonce"
   | "link"
+  | "subtype"
+  | "customData"
   | "strokeStyle"
   | "fillStyle"
   | "strokeColor"
@@ -93,8 +105,10 @@ const _newElementBase = <T extends ExcalidrawElement>(
     ...rest
   }: ElementConstructorOpts & Omit<Partial<ExcalidrawGenericElement>, "type">,
 ) => {
+  const { subtype, customData } = rest;
   // assign type to guard against excess properties
   const element: Merge<ExcalidrawGenericElement, { type: T["type"] }> = {
+    ...maybeGetSubtypeProps({ subtype, customData }),
     id: rest.id || randomId(),
     type,
     x,
@@ -128,8 +142,11 @@ export const newElement = (
   opts: {
     type: ExcalidrawGenericElement["type"];
   } & ElementConstructorOpts,
-): NonDeleted<ExcalidrawGenericElement> =>
-  _newElementBase<ExcalidrawGenericElement>(opts.type, opts);
+): NonDeleted<ExcalidrawGenericElement> => {
+  const map = getSubtypeMethods(opts?.subtype);
+  map?.clean && map.clean(opts);
+  return _newElementBase<ExcalidrawGenericElement>(opts.type, opts);
+};
 
 export const newEmbeddableElement = (
   opts: {
@@ -196,10 +213,12 @@ export const newTextElement = (
   const fontSize = opts.fontSize || DEFAULT_FONT_SIZE;
   const lineHeight = opts.lineHeight || getDefaultLineHeight(fontFamily);
   const text = normalizeText(opts.text);
-  const metrics = measureText(
-    text,
-    getFontString({ fontFamily, fontSize }),
-    lineHeight,
+  const metrics = measureTextElement(
+    { ...opts, fontSize, fontFamily, lineHeight },
+    {
+      text,
+      customData: opts.customData,
+    },
   );
   const textAlign = opts.textAlign || DEFAULT_TEXT_ALIGN;
   const verticalAlign = opts.verticalAlign || DEFAULT_VERTICAL_ALIGN;
@@ -244,7 +263,9 @@ const getAdjustedDimensions = (
     width: nextWidth,
     height: nextHeight,
     baseline: nextBaseline,
-  } = measureText(nextText, getFontString(element), element.lineHeight);
+  } = measureTextElement(element, {
+    text: nextText,
+  });
   const { textAlign, verticalAlign } = element;
   let x: number;
   let y: number;
@@ -253,11 +274,7 @@ const getAdjustedDimensions = (
     verticalAlign === VERTICAL_ALIGN.MIDDLE &&
     !element.containerId
   ) {
-    const prevMetrics = measureText(
-      element.text,
-      getFontString(element),
-      element.lineHeight,
-    );
+    const prevMetrics = measureTextElement(element);
     const offsets = getTextElementPositionOffsets(element, {
       width: nextWidth - prevMetrics.width,
       height: nextHeight - prevMetrics.height,
@@ -313,11 +330,9 @@ export const refreshTextDimensions = (
   }
   const container = getContainerElement(textElement);
   if (container) {
-    text = wrapText(
+    text = wrapTextElement(textElement, getBoundTextMaxWidth(container), {
       text,
-      getFontString(textElement),
-      getBoundTextMaxWidth(container),
-    );
+    });
   }
   const dimensions = getAdjustedDimensions(textElement, text);
   return { text, ...dimensions };

src/element/resizeElements.ts

@@ -41,7 +41,7 @@ import {
   MaybeTransformHandleType,
   TransformHandleDirection,
 } from "./transformHandles";
-import { Point, PointerDownState } from "../types";
+import { AppState, Point, PointerDownState } from "../types";
 import Scene from "../scene/Scene";
 import {
   getApproxMinLineWidth,
@@ -51,7 +51,7 @@ import {
   handleBindTextResize,
   getBoundTextMaxWidth,
   getApproxMinLineHeight,
-  measureText,
+  measureTextElement,
   getBoundTextMaxHeight,
 } from "./textElement";
 import { LinearElementEditor } from "./linearElementEditor";
@@ -79,6 +79,7 @@ export const transformElements = (
   pointerY: number,
   centerX: number,
   centerY: number,
+  appState: AppState,
 ) => {
   if (selectedElements.length === 1) {
     const [element] = selectedElements;
@@ -223,11 +224,7 @@ const measureFontSizeFromWidth = (
   if (nextFontSize < MIN_FONT_SIZE) {
     return null;
   }
-  const metrics = measureText(
-    element.text,
-    getFontString({ fontSize: nextFontSize, fontFamily: element.fontFamily }),
-    element.lineHeight,
-  );
+  const metrics = measureTextElement(element, { fontSize: nextFontSize });
   return {
     size: nextFontSize,
     baseline: metrics.baseline + (nextHeight - metrics.height),
@@ -466,8 +463,8 @@ export const resizeSingleElement = (
         boundTextElement.fontSize,
         boundTextElement.lineHeight,
       );
-      eleNewWidth = Math.ceil(Math.max(eleNewWidth, minWidth));
-      eleNewHeight = Math.ceil(Math.max(eleNewHeight, minHeight));
+      eleNewWidth = Math.max(eleNewWidth, minWidth);
+      eleNewHeight = Math.max(eleNewHeight, minHeight);
     }
   }
 
@@ -508,8 +505,11 @@ export const resizeSingleElement = (
     }
   }
 
+  const flipX = eleNewWidth < 0;
+  const flipY = eleNewHeight < 0;
+
   // Flip horizontally
-  if (eleNewWidth < 0) {
+  if (flipX) {
     if (transformHandleDirection.includes("e")) {
       newTopLeft[0] -= Math.abs(newBoundsWidth);
     }
@@ -517,8 +517,9 @@ export const resizeSingleElement = (
       newTopLeft[0] += Math.abs(newBoundsWidth);
     }
   }
+
   // Flip vertically
-  if (eleNewHeight < 0) {
+  if (flipY) {
     if (transformHandleDirection.includes("s")) {
       newTopLeft[1] -= Math.abs(newBoundsHeight);
     }
@@ -542,10 +543,20 @@ export const resizeSingleElement = (
   const rotatedNewCenter = rotatePoint(newCenter, startCenter, angle);
   newTopLeft = rotatePoint(rotatedTopLeft, rotatedNewCenter, -angle);
 
+  // For linear elements (x,y) are the coordinates of the first drawn point not the top-left corner
+  // So we need to readjust (x,y) to be where the first point should be
+  const newOrigin = [...newTopLeft];
+  const linearElementXOffset = stateAtResizeStart.x - newBoundsX1;
+  const linearElementYOffset = stateAtResizeStart.y - newBoundsY1;
+  newOrigin[0] += linearElementXOffset;
+  newOrigin[1] += linearElementYOffset;
+
+  const nextX = newOrigin[0];
+  const nextY = newOrigin[1];
+
   // Readjust points for linear elements
   let rescaledElementPointsY;
   let rescaledPoints;
-
   if (isLinearElement(element) || isFreeDrawElement(element)) {
     rescaledElementPointsY = rescalePoints(
       1,
@@ -562,16 +573,11 @@ export const resizeSingleElement = (
     );
   }
 
-  // For linear elements (x,y) are the coordinates of the first drawn point not the top-left corner
-  // So we need to readjust (x,y) to be where the first point should be
-  const newOrigin = [...newTopLeft];
-  newOrigin[0] += stateAtResizeStart.x - newBoundsX1;
-  newOrigin[1] += stateAtResizeStart.y - newBoundsY1;
   const resizedElement = {
     width: Math.abs(eleNewWidth),
     height: Math.abs(eleNewHeight),
-    x: newOrigin[0],
-    y: newOrigin[1],
+    x: nextX,
+    y: nextY,
     points: rescaledPoints,
   };
 
@@ -680,6 +686,10 @@ export const resizeMultipleElements = (
   const { minX, minY, maxX, maxY, midX, midY } = getCommonBoundingBox(
     targetElements.map(({ orig }) => orig).concat(boundTextElements),
   );
+
+  // const originalHeight = maxY - minY;
+  // const originalWidth = maxX - minX;
+
   const direction = transformHandleType;
 
   const mapDirectionsToAnchors: Record<typeof direction, Point> = {

src/element/showSelectedShapeActions.ts

@@ -12,6 +12,7 @@ export const showSelectedShapeActions = (
         (appState.editingElement ||
           (appState.activeTool.type !== "selection" &&
             appState.activeTool.type !== "eraser" &&
-            appState.activeTool.type !== "hand"))) ||
+            appState.activeTool.type !== "hand" &&
+            appState.activeTool.type !== "laser"))) ||
         getSelectedElements(elements, appState).length),
   );

src/element/subtypes/index.ts

@@ -0,0 +1,222 @@
+import { ExcalidrawElement, ExcalidrawTextElement, NonDeleted } from "../types";
+import { getNonDeletedElements } from "../";
+
+import { isTextElement } from "../typeChecks";
+import { getContainerElement, redrawTextBoundingBox } from "../textElement";
+import { ShapeCache } from "../../scene/ShapeCache";
+import Scene from "../../scene/Scene";
+
+// Use "let" instead of "const" so we can dynamically add subtypes
+let subtypeNames: readonly Subtype[] = [];
+let parentTypeMap: readonly {
+  subtype: Subtype;
+  parentType: ExcalidrawElement["type"];
+}[] = [];
+
+export type SubtypeRecord = Readonly<{
+  subtype: Subtype;
+  parents: readonly ExcalidrawElement["type"][];
+}>;
+
+// Subtype Names
+export type Subtype = Required<ExcalidrawElement>["subtype"];
+export const getSubtypeNames = (): readonly Subtype[] => {
+  return subtypeNames;
+};
+
+// Subtype Methods
+export type SubtypeMethods = {
+  clean: (
+    updates: Omit<
+      Partial<ExcalidrawElement>,
+      "id" | "version" | "versionNonce"
+    >,
+  ) => Omit<Partial<ExcalidrawElement>, "id" | "version" | "versionNonce">;
+  ensureLoaded: (callback?: () => void) => Promise<void>;
+  getEditorStyle: (element: ExcalidrawTextElement) => Record<string, any>;
+  measureText: (
+    element: Pick<
+      ExcalidrawTextElement,
+      | "subtype"
+      | "customData"
+      | "fontSize"
+      | "fontFamily"
+      | "text"
+      | "lineHeight"
+    >,
+    next?: {
+      fontSize?: number;
+      text?: string;
+      customData?: ExcalidrawElement["customData"];
+    },
+  ) => { width: number; height: number; baseline: number };
+  render: (
+    element: NonDeleted<ExcalidrawElement>,
+    context: CanvasRenderingContext2D,
+  ) => void;
+  renderSvg: (
+    svgRoot: SVGElement,
+    root: SVGElement,
+    element: NonDeleted<ExcalidrawElement>,
+    opt?: { offsetX?: number; offsetY?: number },
+  ) => void;
+  wrapText: (
+    element: Pick<
+      ExcalidrawTextElement,
+      | "subtype"
+      | "customData"
+      | "fontSize"
+      | "fontFamily"
+      | "originalText"
+      | "lineHeight"
+    >,
+    containerWidth: number,
+    next?: {
+      fontSize?: number;
+      text?: string;
+      customData?: ExcalidrawElement["customData"];
+    },
+  ) => string;
+};
+
+type MethodMap = { subtype: Subtype; methods: Partial<SubtypeMethods> };
+const methodMaps = [] as Array<MethodMap>;
+
+// Use `getSubtypeMethods` to call subtype-specialized methods, like `render`.
+export const getSubtypeMethods = (
+  subtype: Subtype | undefined,
+): Partial<SubtypeMethods> | undefined => {
+  const map = methodMaps.find((method) => method.subtype === subtype);
+  return map?.methods;
+};
+
+export const addSubtypeMethods = (
+  subtype: Subtype,
+  methods: Partial<SubtypeMethods>,
+) => {
+  if (!subtypeNames.includes(subtype)) {
+    return;
+  }
+  if (!methodMaps.find((method) => method.subtype === subtype)) {
+    methodMaps.push({ subtype, methods });
+  }
+};
+
+// Callback to re-render subtyped `ExcalidrawElement`s after completing
+// async loading of the subtype.
+export type SubtypeLoadedCb = (hasSubtype: SubtypeCheckFn) => void;
+export type SubtypeCheckFn = (element: ExcalidrawElement) => boolean;
+
+// Functions to prepare subtypes for use
+export type SubtypePrepFn = (onSubtypeLoaded?: SubtypeLoadedCb) => {
+  methods: Partial<SubtypeMethods>;
+};
+
+// This is the main method to set up the subtype.  The optional
+// `onSubtypeLoaded` callback may be used to re-render subtyped
+// `ExcalidrawElement`s after the subtype has finished async loading.
+export const prepareSubtype = (
+  record: SubtypeRecord,
+  subtypePrepFn: SubtypePrepFn,
+  onSubtypeLoaded?: SubtypeLoadedCb,
+): { methods: Partial<SubtypeMethods> } => {
+  const map = getSubtypeMethods(record.subtype);
+  if (map) {
+    return { methods: map };
+  }
+
+  // Check for undefined/null subtypes and parentTypes
+  if (
+    record.subtype === undefined ||
+    record.subtype === "" ||
+    record.parents === undefined ||
+    record.parents.length === 0
+  ) {
+    return { methods: {} };
+  }
+
+  // Register the types
+  const subtype = record.subtype;
+  subtypeNames = [...subtypeNames, subtype];
+  record.parents.forEach((parentType) => {
+    parentTypeMap = [...parentTypeMap, { subtype, parentType }];
+  });
+
+  // Prepare the subtype
+  const { methods } = subtypePrepFn(onSubtypeLoaded);
+
+  // Register the subtype's methods
+  addSubtypeMethods(record.subtype, methods);
+  return { methods };
+};
+
+// Ensure all subtypes are loaded before continuing, eg to
+// redraw text element bounding boxes correctly.
+export const ensureSubtypesLoadedForElements = async (
+  elements: readonly ExcalidrawElement[],
+  callback?: () => void,
+) => {
+  // Only ensure the loading of subtypes which are actually needed.
+  // We don't want to be held up by eg downloading the MathJax SVG fonts
+  // if we don't actually need them yet.
+  const subtypesUsed = [] as Subtype[];
+  elements.forEach((el) => {
+    if (
+      "subtype" in el &&
+      el.subtype !== undefined &&
+      !subtypesUsed.includes(el.subtype)
+    ) {
+      subtypesUsed.push(el.subtype);
+    }
+  });
+  await ensureSubtypesLoaded(subtypesUsed, callback);
+};
+
+export const ensureSubtypesLoaded = async (
+  subtypes: Subtype[],
+  callback?: () => void,
+) => {
+  // Use a for loop so we can do `await map.ensureLoaded()`
+  for (let i = 0; i < subtypes.length; i++) {
+    const subtype = subtypes[i];
+    // Should be defined if prepareSubtype() has run
+    const map = getSubtypeMethods(subtype);
+    if (map?.ensureLoaded) {
+      await map.ensureLoaded();
+    }
+  }
+  if (callback) {
+    callback();
+  }
+};
+
+// Call this method after finishing any async loading for
+// subtypes of ExcalidrawElement if the newly loaded code
+// would change the rendering.
+export const checkRefreshOnSubtypeLoad = (
+  hasSubtype: SubtypeCheckFn,
+  elements: readonly ExcalidrawElement[],
+) => {
+  let refreshNeeded = false;
+  const scenes: Scene[] = [];
+  getNonDeletedElements(elements).forEach((element) => {
+    // If the element is of the subtype that was just
+    // registered, update the element's dimensions, mark the
+    // element for a re-render, and indicate the scene needs a refresh.
+    if (hasSubtype(element)) {
+      ShapeCache.delete(element);
+      if (isTextElement(element)) {
+        redrawTextBoundingBox(element, getContainerElement(element));
+      }
+      refreshNeeded = true;
+      const scene = Scene.getScene(element);
+      if (scene && !scenes.includes(scene)) {
+        // Store in case we have multiple scenes
+        scenes.push(scene);
+      }
+    }
+  });
+  // Only inform each scene once
+  scenes.forEach((scene) => scene.informMutation());
+  return refreshNeeded;
+};