added notebook grid mode

packages/excalidraw/actions/actionToggleGridNotebookMode.tsx

@@ -0,0 +1,32 @@
+import { CODES, KEYS } from "../keys";
+import { register } from "./register";
+import type { AppState } from "../types";
+import { gridIcon } from "../components/icons";
+import { CaptureUpdateAction } from "../store";
+
+export const actionToggleGridNotebookMode = register({
+  name: "gridModeNotebook",
+  icon: gridIcon,
+  keywords: ["snap"],
+  label: "labels.toggleGridNotebook",
+  viewMode: true,
+  trackEvent: {
+    category: "canvas",
+    predicate: (appState) => appState.gridModeNotebookEnabled,
+  },
+  perform(elements, appState) {
+    return {
+      appState: {
+        ...appState,
+        gridModeNotebookEnabled: !this.checked!(appState),
+        objectsSnapModeEnabled: false,
+      },
+      captureUpdate: CaptureUpdateAction.EVENTUALLY,
+    };
+  },
+  checked: (appState: AppState) => appState.gridModeNotebookEnabled,
+  predicate: (element, appState, props) => {
+    return props.gridModeNotebookEnabled === undefined;
+  },
+  keyTest: (event) => event[KEYS.CTRL_OR_CMD] && event.code === CODES.SEMICOLON,
+});

packages/excalidraw/actions/actionToggleObjectsSnapMode.tsx

@@ -18,6 +18,7 @@ export const actionToggleObjectsSnapMode = register({
         ...appState,
         objectsSnapModeEnabled: !this.checked!(appState),
         gridModeEnabled: false,
+        gridModeNotebookEnabled: false,
       },
       captureUpdate: CaptureUpdateAction.EVENTUALLY,
     };

packages/excalidraw/actions/index.ts

@@ -78,6 +78,7 @@ export {
 } from "./actionClipboard";
 
 export { actionToggleGridMode } from "./actionToggleGridMode";
+export { actionToggleGridNotebookMode } from "./actionToggleGridNotebookMode";
 export { actionToggleZenMode } from "./actionToggleZenMode";
 export { actionToggleObjectsSnapMode } from "./actionToggleObjectsSnapMode";
 

packages/excalidraw/actions/shortcuts.ts

@@ -26,6 +26,7 @@ export type ShortcutName =
       | "group"
       | "ungroup"
       | "gridMode"
+      | "gridModeNotebook"
       | "zenMode"
       | "objectsSnapMode"
       | "stats"
@@ -91,6 +92,7 @@ const shortcutMap: Record<ShortcutName, string[]> = {
   group: [getShortcutKey("CtrlOrCmd+G")],
   ungroup: [getShortcutKey("CtrlOrCmd+Shift+G")],
   gridMode: [getShortcutKey("CtrlOrCmd+'")],
+  gridModeNotebook: [getShortcutKey("CtrlOrCmd+;")],
   zenMode: [getShortcutKey("Alt+Z")],
   objectsSnapMode: [getShortcutKey("Alt+S")],
   stats: [getShortcutKey("Alt+/")],

packages/excalidraw/actions/types.ts

@@ -55,6 +55,7 @@ export type ActionName =
   | "selectAll"
   | "pasteStyles"
   | "gridMode"
+  | "gridModeNotebook"
   | "zenMode"
   | "objectsSnapMode"
   | "stats"

packages/excalidraw/appState.ts

@@ -64,6 +64,7 @@ export const getDefaultAppState = (): Omit<
     gridSize: DEFAULT_GRID_SIZE,
     gridStep: DEFAULT_GRID_STEP,
     gridModeEnabled: false,
+    gridModeNotebookEnabled: false,
     isBindingEnabled: true,
     defaultSidebarDockedPreference: false,
     isLoading: false,
@@ -184,6 +185,7 @@ const APP_STATE_STORAGE_CONF = (<
   gridSize: { browser: true, export: true, server: true },
   gridStep: { browser: true, export: true, server: true },
   gridModeEnabled: { browser: true, export: true, server: true },
+  gridModeNotebookEnabled: { browser: true, export: true, server: true },
   height: { browser: false, export: false, server: false },
   isBindingEnabled: { browser: false, export: false, server: false },
   defaultSidebarDockedPreference: {

packages/excalidraw/components/App.tsx

@@ -26,6 +26,7 @@ import {
   actionSendBackward,
   actionSendToBack,
   actionToggleGridMode,
+  actionToggleGridNotebookMode,
   actionToggleStats,
   actionToggleZenMode,
   actionUnbindText,
@@ -388,6 +389,7 @@ import {
   SnapCache,
   isGridModeEnabled,
   getGridPoint,
+  isGridModeNotebookEnabled,
 } from "../snapping";
 import { actionWrapTextInContainer } from "../actions/actionBoundText";
 import BraveMeasureTextError from "./BraveMeasureTextError";
@@ -1740,6 +1742,7 @@ class App extends React.Component<AppProps, AppState> {
                             imageCache: this.imageCache,
                             isExporting: false,
                             renderGrid: isGridModeEnabled(this),
+                            renderGridNotebook: isGridModeNotebookEnabled(this),
                             canvasBackgroundColor:
                               this.state.viewBackgroundColor,
                             embedsValidationStatus: this.embedsValidationStatus,
@@ -1759,6 +1762,7 @@ class App extends React.Component<AppProps, AppState> {
                               imageCache: this.imageCache,
                               isExporting: false,
                               renderGrid: false,
+                              renderGridNotebook: false,
                               canvasBackgroundColor:
                                 this.state.viewBackgroundColor,
                               embedsValidationStatus:
@@ -10783,6 +10787,7 @@ class App extends React.Component<AppProps, AppState> {
         return [
           ...options,
           actionToggleGridMode,
+          actionToggleGridNotebookMode,
           actionToggleZenMode,
           actionToggleViewMode,
           actionToggleStats,
@@ -10800,6 +10805,7 @@ class App extends React.Component<AppProps, AppState> {
         actionUnlockAllElements,
         CONTEXT_MENU_SEPARATOR,
         actionToggleGridMode,
+        actionToggleGridNotebookMode,
         actionToggleObjectsSnapMode,
         actionToggleZenMode,
         actionToggleViewMode,

packages/excalidraw/components/HelpDialog.tsx

@@ -287,6 +287,10 @@ export const HelpDialog = ({ onClose }: { onClose?: () => void }) => {
               label={t("labels.toggleGrid")}
               shortcuts={[getShortcutKey("CtrlOrCmd+'")]}
             />
+            <Shortcut
+              label={t("labels.toggleGridNotebook")}
+              shortcuts={[getShortcutKey("CtrlOrCmd+;")]}
+            />
             <Shortcut
               label={t("labels.viewMode")}
               shortcuts={[getShortcutKey("Alt+R")]}

packages/excalidraw/keys.ts

@@ -14,6 +14,7 @@ export const CODES = {
   THREE: "Digit3",
   NINE: "Digit9",
   QUOTE: "Quote",
+  SEMICOLON: "Semicolon",
   ZERO: "Digit0",
   SLASH: "Slash",
   C: "KeyC",

packages/excalidraw/locales/en.json

@@ -96,6 +96,7 @@
     "ungroup": "Ungroup selection",
     "collaborators": "Collaborators",
     "toggleGrid": "Toggle grid",
+    "toggleGridNotebook": "Toggle grid notebook",
     "addToLibrary": "Add to library",
     "removeFromLibrary": "Remove from library",
     "libraryLoadingMessage": "Loading library…",

packages/excalidraw/renderer/staticScene.ts

@@ -108,6 +108,61 @@ const strokeGrid = (
   }
   context.restore();
 };
+const strokeNotebookLines = (
+  context: CanvasRenderingContext2D,
+  /** Line spacing in pixels */
+  lineSpacing: number,
+  /** Determines when to draw a bold line (e.g., every 5th line) */
+  boldStep: number,
+  scrollY: number,
+  zoom: Zoom,
+  width: number,
+  height: number
+) => {
+  const offsetY = (scrollY % lineSpacing) - lineSpacing;
+  const actualLineSpacing = lineSpacing * zoom.value;
+
+  context.save();
+
+  if (zoom.value === 1) {
+    context.translate(0, offsetY % 1 ? 0 : 0.5);
+  }
+
+  for (
+    let y = offsetY;
+    y < offsetY + height + lineSpacing * 2;
+    y += lineSpacing
+  ) {
+    const isBold = boldStep > 1 && Math.round(y - scrollY) % (boldStep * lineSpacing) === 0;
+
+    if (!isBold && actualLineSpacing < 10) {
+      continue;
+    }
+
+    const lineWidth = Math.min(1 / zoom.value, isBold ? 2 : 1);
+    context.lineWidth = lineWidth;
+    context.setLineDash([]); // Notebook lines are solid
+
+    context.beginPath();
+    context.strokeStyle = isBold
+      ? "rgba(0, 0, 150, 0.2)"
+      : "rgba(0, 0, 255, 0.1)"; // Slightly darker bold lines
+    context.moveTo(0, y);
+    context.lineTo(width, y);
+    context.stroke();
+  }
+
+  // Optional: Add a red left margin line
+  context.strokeStyle = "rgba(255, 0, 0, 0.3)"; // Light red margin line
+  context.lineWidth = 1;
+  context.beginPath();
+  context.moveTo(40, 0); // Adjust margin position
+  context.lineTo(40, height);
+  context.stroke();
+
+  context.restore();
+};
+
 
 const frameClip = (
   frame: ExcalidrawFrameLikeElement,
@@ -219,7 +274,7 @@ const _renderStaticScene = ({
     return;
   }
 
-  const { renderGrid = true, isExporting } = renderConfig;
+  const { renderGrid = true, renderGridNotebook=true, isExporting } = renderConfig;
 
   const [normalizedWidth, normalizedHeight] = getNormalizedCanvasDimensions(
     canvas,
@@ -251,6 +306,16 @@ const _renderStaticScene = ({
       normalizedWidth / appState.zoom.value,
       normalizedHeight / appState.zoom.value,
     );
+  } else if (renderGridNotebook) {
+    strokeNotebookLines(
+      context,
+      appState.gridSize,
+      appState.gridStep,
+      appState.scrollY,
+      appState.zoom,
+      normalizedWidth / appState.zoom.value,
+      normalizedHeight / appState.zoom.value,
+    );
   }
 
   const groupsToBeAddedToFrame = new Set<string>();

packages/excalidraw/scene/export.ts

@@ -244,6 +244,7 @@ export const exportToCanvas = async (
       canvasBackgroundColor: viewBackgroundColor,
       imageCache,
       renderGrid: false,
+      renderGridNotebook: false,
       isExporting: true,
       // empty disables embeddable rendering
       embedsValidationStatus: new Map(),

packages/excalidraw/scene/types.ts

@@ -29,6 +29,7 @@ export type StaticCanvasRenderConfig = {
   // ---------------------------------------------------------------------------
   imageCache: AppClassProperties["imageCache"];
   renderGrid: boolean;
+  renderGridNotebook: boolean;
   /** when exporting the behavior is slightly different (e.g. we can't use
    CSS filters), and we disable render optimizations for best output */
   isExporting: boolean;

packages/excalidraw/snapping.ts

@@ -154,6 +154,8 @@ export class SnapCache {
 
 export const isGridModeEnabled = (app: AppClassProperties): boolean =>
   app.props.gridModeEnabled ?? app.state.gridModeEnabled;
+export const isGridModeNotebookEnabled = (app: AppClassProperties): boolean =>
+  app.props.gridModeNotebookEnabled ?? app.state.gridModeNotebookEnabled;
 
 export const isSnappingEnabled = ({
   event,

packages/excalidraw/types.ts

@@ -361,6 +361,7 @@ export interface AppState {
   gridSize: number;
   gridStep: number;
   gridModeEnabled: boolean;
+  gridModeNotebookEnabled: boolean;
   viewModeEnabled: boolean;
 
   /** top-most selected groups (i.e. does not include nested groups) */
@@ -538,6 +539,7 @@ export interface ExcalidrawProps {
   viewModeEnabled?: boolean;
   zenModeEnabled?: boolean;
   gridModeEnabled?: boolean;
+  gridModeNotebookEnabled?: boolean;
   objectsSnapModeEnabled?: boolean;
   libraryReturnUrl?: string;
   theme?: Theme;