fix: Dragged arrow endpoint ignore grid and angle locks

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

packages/excalidraw/actions/actionFinalize.tsx

@@ -17,6 +17,7 @@ import {
 import {
   KEYS,
   arrayToMap,
+  getGridPoint,
   invariant,
   shouldRotateWithDiscreteAngle,
   updateActiveTool,
@@ -27,7 +28,7 @@ import { isInvisiblySmallElement } from "@excalidraw/element";
 
 import { CaptureUpdateAction } from "@excalidraw/element";
 
-import type { GlobalPoint, LocalPoint } from "@excalidraw/math";
+import type { LocalPoint } from "@excalidraw/math";
 import type {
   ExcalidrawElement,
   ExcalidrawLinearElement,
@@ -93,32 +94,56 @@ export const actionFinalize = register<FormData>({
             ? [element.points.length - 1] // New arrow creation
             : appState.selectedLinearElement.selectedPointsIndices;
 
+        const angleLocked = shouldRotateWithDiscreteAngle(event);
+        const effectiveGridSize = event[KEYS.CTRL_OR_CMD]
+          ? null
+          : app.getEffectiveGridSize();
+
         const draggedPoints: PointsPositionUpdates =
           selectedPointsIndices.reduce((map, index) => {
             map.set(index, {
-              point: LinearElementEditor.pointFromAbsoluteCoords(
-                element,
-                pointFrom<GlobalPoint>(
-                  sceneCoords.x - linearElementEditor.pointerOffset.x,
-                  sceneCoords.y - linearElementEditor.pointerOffset.y,
-                ),
-                elementsMap,
-              ),
+              point: angleLocked
+                ? element.points[index]
+                : LinearElementEditor.createPointAt(
+                    element,
+                    elementsMap,
+                    sceneCoords.x - linearElementEditor.pointerOffset.x,
+                    sceneCoords.y - linearElementEditor.pointerOffset.y,
+                    effectiveGridSize,
+                  ),
             });
 
             return map;
           }, new Map()) ?? new Map();
+
+        const startIsDragged = selectedPointsIndices.includes(0);
+        const lockedGlobal = angleLocked
+          ? LinearElementEditor.getPointAtIndexGlobalCoordinates(
+              element,
+              startIsDragged ? 0 : -1,
+              elementsMap,
+            )
+          : null;
+        const [gridSnappedX, gridSnappedY] = getGridPoint(
+          sceneCoords.x - linearElementEditor.pointerOffset.x,
+          sceneCoords.y - linearElementEditor.pointerOffset.y,
+          effectiveGridSize,
+        );
+        const bindingSceneX = lockedGlobal ? lockedGlobal[0] : gridSnappedX;
+        const bindingSceneY = lockedGlobal ? lockedGlobal[1] : gridSnappedY;
+
         bindOrUnbindBindingElement(
           element,
           draggedPoints,
-          sceneCoords.x - linearElementEditor.pointerOffset.x,
-          sceneCoords.y - linearElementEditor.pointerOffset.y,
+          bindingSceneX,
+          bindingSceneY,
           scene,
           appState,
           {
             newArrow,
             altKey: event.altKey,
-            angleLocked: shouldRotateWithDiscreteAngle(event),
+            angleLocked,
+            gridSize: effectiveGridSize,
           },
         );
       } else if (isLineElement(element)) {

packages/excalidraw/components/canvases/InteractiveCanvas.tsx

@@ -251,6 +251,7 @@ const getRelevantAppStateProps = (
   newElement: appState.newElement,
   isBindingEnabled: appState.isBindingEnabled,
   isMidpointSnappingEnabled: appState.isMidpointSnappingEnabled,
+  gridModeEnabled: appState.gridModeEnabled,
   suggestedBinding: appState.suggestedBinding,
   isRotating: appState.isRotating,
   elementsToHighlight: appState.elementsToHighlight,

packages/excalidraw/renderer/interactiveScene.ts

@@ -17,6 +17,7 @@ import {
   FRAME_STYLE,
   getFeatureFlag,
   invariant,
+  shouldRotateWithDiscreteAngle,
   THEME,
 } from "@excalidraw/common";
 
@@ -222,6 +223,7 @@ const renderBindingHighlightForBindableElement_simple = (
   elementsMap: ElementsMap,
   appState: InteractiveCanvasAppState,
   pointerCoords: GlobalPoint | null,
+  angleLocked = false,
 ) => {
   const enclosingFrame =
     suggestedBinding.element.frameId &&
@@ -408,6 +410,8 @@ const renderBindingHighlightForBindableElement_simple = (
 
   if (
     appState.isMidpointSnappingEnabled &&
+    !appState.gridModeEnabled &&
+    !angleLocked &&
     (isFrameLikeElement(suggestedBinding.element) ||
       isBindableElement(suggestedBinding.element))
   ) {
@@ -800,7 +804,12 @@ const renderBindingHighlightForBindableElement_complex = (
 
     context.restore();
 
-    if (appState.isMidpointSnappingEnabled) {
+    if (
+      appState.isMidpointSnappingEnabled &&
+      !appState.gridModeEnabled &&
+      (!app.lastPointerMoveEvent ||
+        !shouldRotateWithDiscreteAngle(app.lastPointerMoveEvent))
+    ) {
       // Draw midpoint indicators
       context.save();
       context.translate(
@@ -913,12 +922,16 @@ const renderBindingHighlightForBindableElement = (
         app.lastPointerMoveCoords.y,
       )
     : null;
+  const angleLocked =
+    !!app.lastPointerMoveEvent &&
+    shouldRotateWithDiscreteAngle(app.lastPointerMoveEvent);
   renderBindingHighlightForBindableElement_simple(
     context,
     suggestedBinding,
     allElementsMap,
     appState,
     pointerCoords,
+    angleLocked,
   );
   context.restore();
 };

packages/excalidraw/types.ts

@@ -223,6 +223,7 @@ export type InteractiveCanvasAppState = Readonly<
     newElement: AppState["newElement"];
     isBindingEnabled: AppState["isBindingEnabled"];
     isMidpointSnappingEnabled: AppState["isMidpointSnappingEnabled"];
+    gridModeEnabled: AppState["gridModeEnabled"];
     suggestedBinding: AppState["suggestedBinding"];
     isRotating: AppState["isRotating"];
     elementsToHighlight: AppState["elementsToHighlight"];
@@ -824,6 +825,7 @@ export type AppClassProperties = {
   onStateChange: App["onStateChange"];
 
   lastPointerMoveCoords: App["lastPointerMoveCoords"];
+  lastPointerMoveEvent: App["lastPointerMoveEvent"];
   bindModeHandler: App["bindModeHandler"];
 
   setAppState: App["setAppState"];