fix: Turn into inside bind when angle locked (#10479)

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

packages/element/src/binding.ts

@@ -151,6 +151,7 @@ export const bindOrUnbindBindingElement = (
   opts?: {
     newArrow?: boolean;
     altKey?: boolean;
+    angleLocked?: boolean;
     initialBinding?: boolean;
   },
 ) => {
@@ -561,7 +562,7 @@ export const getBindingStrategyForDraggingBindingElementEndpoints = (
   appState: AppState,
   opts?: {
     newArrow?: boolean;
-    shiftKey?: boolean;
+    angleLocked?: boolean;
     altKey?: boolean;
     finalize?: boolean;
     initialBinding?: boolean;
@@ -597,7 +598,7 @@ const getBindingStrategyForDraggingBindingElementEndpoints_simple = (
   appState: AppState,
   opts?: {
     newArrow?: boolean;
-    shiftKey?: boolean;
+    angleLocked?: boolean;
     altKey?: boolean;
     finalize?: boolean;
     initialBinding?: boolean;
@@ -770,6 +771,12 @@ const getBindingStrategyForDraggingBindingElementEndpoints_simple = (
         }
     : { mode: null };
 
+  const otherEndpoint = LinearElementEditor.getPointAtIndexGlobalCoordinates(
+    arrow,
+    startDragged ? -1 : 0,
+    elementsMap,
+  );
+
   const other: BindingStrategy =
     otherBindableElement &&
     !otherFocusPointIsInElement &&
@@ -779,6 +786,19 @@ const getBindingStrategyForDraggingBindingElementEndpoints_simple = (
           element: otherBindableElement,
           focusPoint: appState.selectedLinearElement.initialState.altFocusPoint,
         }
+      : opts?.angleLocked && otherBindableElement
+      ? {
+          mode: "orbit",
+          element: otherBindableElement,
+          focusPoint:
+            projectFixedPointOntoDiagonal(
+              arrow,
+              otherEndpoint,
+              otherBindableElement,
+              startDragged ? "end" : "start",
+              elementsMap,
+            ) || otherEndpoint,
+        }
       : { mode: undefined };
 
   return {

packages/element/src/linearElementEditor.ts

@@ -26,7 +26,6 @@ import {
 
 import {
   deconstructLinearOrFreeDrawElement,
-  getHoveredElementForBinding,
   isPathALoop,
   moveArrowAboveBindable,
   projectFixedPointOntoDiagonal,
@@ -306,21 +305,11 @@ export class LinearElementEditor {
     const customLineAngle =
       linearElementEditor.customLineAngle ??
       determineCustomLinearAngle(pivotPoint, element.points[idx]);
-    const hoveredElement = getHoveredElementForBinding(
-      pointFrom<GlobalPoint>(scenePointerX, scenePointerY),
-      elements,
-      elementsMap,
-    );
 
     // Determine if point movement should happen and how much
     let deltaX = 0;
     let deltaY = 0;
-    if (
-      shouldRotateWithDiscreteAngle(event) &&
-      !hoveredElement &&
-      !element.startBinding &&
-      !element.endBinding
-    ) {
+    if (shouldRotateWithDiscreteAngle(event)) {
       const [width, height] = LinearElementEditor._getShiftLockedDelta(
         element,
         elementsMap,
@@ -358,7 +347,7 @@ export class LinearElementEditor {
       element,
       elements,
       app,
-      event.shiftKey,
+      shouldRotateWithDiscreteAngle(event),
       event.altKey,
     );
 
@@ -492,22 +481,11 @@ export class LinearElementEditor {
     const endIsSelected = selectedPointsIndices.includes(
       element.points.length - 1,
     );
-    const hoveredElement = getHoveredElementForBinding(
-      pointFrom<GlobalPoint>(scenePointerX, scenePointerY),
-      elements,
-      elementsMap,
-    );
 
     // Determine if point movement should happen and how much
     let deltaX = 0;
     let deltaY = 0;
-    if (
-      shouldRotateWithDiscreteAngle(event) &&
-      singlePointDragged &&
-      !hoveredElement &&
-      !element.startBinding &&
-      !element.endBinding
-    ) {
+    if (shouldRotateWithDiscreteAngle(event) && singlePointDragged) {
       const [width, height] = LinearElementEditor._getShiftLockedDelta(
         element,
         elementsMap,
@@ -545,7 +523,7 @@ export class LinearElementEditor {
       element,
       elements,
       app,
-      event.shiftKey,
+      shouldRotateWithDiscreteAngle(event) && singlePointDragged,
       event.altKey,
     );
 
@@ -2092,7 +2070,7 @@ const pointDraggingUpdates = (
   element: NonDeleted<ExcalidrawLinearElement>,
   elements: readonly Ordered<NonDeletedExcalidrawElement>[],
   app: AppClassProperties,
-  shiftKey: boolean,
+  angleLocked: boolean,
   altKey: boolean,
 ): {
   positions: PointsPositionUpdates;
@@ -2133,7 +2111,7 @@ const pointDraggingUpdates = (
     app.state,
     {
       newArrow: !!app.state.newElement,
-      shiftKey,
+      angleLocked,
       altKey,
     },
   );