[wip] snapping

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

@@ -100,6 +100,12 @@ export const getDefaultAppState = (): Omit<
     pendingImageElementId: null,
     showHyperlinkPopup: false,
     selectedLinearElement: null,
+    snapLines: [],
+    originSnapOffset: {
+      x: 0,
+      y: 0,
+    },
+    objectsSnapModeEnabled: false,
   };
 };
 
@@ -207,6 +213,9 @@ 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 = <