From 4980631cb1d7add601e658079f2f13f00992d9e7 Mon Sep 17 00:00:00 2001
From: Mark Tolmacs <mark@lazycat.hu>
Date: Tue, 24 Jun 2025 18:26:17 +0200
Subject: [PATCH] Fix linear editor bug when both midpoint and endpoint is
 moved

---
 packages/element/src/linearElementEditor.ts | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/element/src/linearElementEditor.ts b/packages/element/src/linearElementEditor.ts
index b4d62a165..16ec7e72a 100644
--- a/packages/element/src/linearElementEditor.ts
+++ b/packages/element/src/linearElementEditor.ts
@@ -1475,7 +1475,8 @@ export class LinearElementEditor {
           if (
             otherUpdates?.moveMidPointsWithElement &&
             idx !== 0 &&
-            idx !== points.length - 1
+            idx !== points.length - 1 &&
+            !pointUpdates.has(idx)
           ) {
             return pointFrom<LocalPoint>(current[0], current[1]);
           }
@@ -2023,6 +2024,11 @@ const pointDraggingUpdates = (
   elements: readonly Ordered<NonDeletedExcalidrawElement>[],
   zoom: AppState["zoom"],
 ): PointsPositionUpdates => {
+  const hasMidPoints =
+    selectedPointsIndices.filter(
+      (_, idx) => idx > 0 && idx < element.points.length - 1,
+    ).length > 0;
+
   return new Map(
     selectedPointsIndices.map((pointIndex) => {
       let newPointPosition: LocalPoint =
@@ -2039,7 +2045,10 @@ const pointDraggingUpdates = (
               element.points[pointIndex][1] + deltaY,
             );
 
-      if (pointIndex === 0 || pointIndex === element.points.length - 1) {
+      if (
+        !hasMidPoints &&
+        (pointIndex === 0 || pointIndex === element.points.length - 1)
+      ) {
         const [, , , , cx, cy] = getElementAbsoluteCoords(
           element,
           elementsMap,