fix: bound text rotation across alignments (#9914)

Co-authored-by: A-Mundanilkunathil <aaronchackom2002@gmail.com>

packages/element/src/resizeElements.ts

@@ -35,6 +35,7 @@ import {
   getContainerElement,
   handleBindTextResize,
   getBoundTextMaxWidth,
+  computeBoundTextPosition,
 } from "./textElement";
 import {
   getMinTextElementWidth,
@@ -225,7 +226,16 @@ const rotateSingleElement = (
       scene.getElement<ExcalidrawTextElementWithContainer>(boundTextElementId);
 
     if (textElement && !isArrowElement(element)) {
-      scene.mutateElement(textElement, { angle });
+      const { x, y } = computeBoundTextPosition(
+        element,
+        textElement,
+        scene.getNonDeletedElementsMap(),
+      );
+      scene.mutateElement(textElement, {
+        angle,
+        x,
+        y,
+      });
     }
   }
 };
@@ -416,9 +426,15 @@ const rotateMultipleElements = (
 
       const boundText = getBoundTextElement(element, elementsMap);
       if (boundText && !isArrowElement(element)) {
+        const { x, y } = computeBoundTextPosition(
+          element,
+          boundText,
+          elementsMap,
+        );
+
         scene.mutateElement(boundText, {
-          x: boundText.x + (rotatedCX - cx),
-          y: boundText.y + (rotatedCY - cy),
+          x,
+          y,
           angle: normalizeRadians((centerAngle + origAngle) as Radians),
         });
       }

packages/element/src/textElement.ts

@@ -10,12 +10,12 @@ import {
   invariant,
 } from "@excalidraw/common";
 
+import { pointFrom, pointRotateRads, type Radians } from "@excalidraw/math";
+
 import type { AppState } from "@excalidraw/excalidraw/types";
 
 import type { ExtractSetType } from "@excalidraw/common/utility-types";
 
-import type { Radians } from "@excalidraw/math";
-
 import {
   resetOriginalContainerCache,
   updateOriginalContainerCache,
@@ -254,6 +254,26 @@ export const computeBoundTextPosition = (
     x =
       containerCoords.x + (maxContainerWidth / 2 - boundTextElement.width / 2);
   }
+  const angle = (container.angle ?? 0) as Radians;
+
+  if (angle !== 0) {
+    const contentCenter = pointFrom(
+      containerCoords.x + maxContainerWidth / 2,
+      containerCoords.y + maxContainerHeight / 2,
+    );
+    const textCenter = pointFrom(
+      x + boundTextElement.width / 2,
+      y + boundTextElement.height / 2,
+    );
+
+    const [rx, ry] = pointRotateRads(textCenter, contentCenter, angle);
+
+    return {
+      x: rx - boundTextElement.width / 2,
+      y: ry - boundTextElement.height / 2,
+    };
+  }
+
   return { x, y };
 };