fix: Increase transform handle offset (#10180)

* fix: Increase transform handle offset

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

* fix: Temporarily disable transform handles for linear elements on mobile and tablets

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

* fix: Linear hidden resize

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

* disable mobielOrTablet linear element bbox completely

* fix: Test

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

* fix: Lint

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

---------

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>
Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/element/src/transformHandles.ts

@@ -2,6 +2,7 @@ import {
   DEFAULT_TRANSFORM_HANDLE_SPACING,
   isAndroid,
   isIOS,
+  isMobileOrTablet,
 } from "@excalidraw/common";
 
 import { pointFrom, pointRotateRads } from "@excalidraw/math";
@@ -326,7 +327,7 @@ export const getTransformHandles = (
   );
 };
 
-export const shouldShowBoundingBox = (
+export const hasBoundingBox = (
   elements: readonly NonDeletedExcalidrawElement[],
   appState: InteractiveCanvasAppState,
 ) => {
@@ -345,5 +346,7 @@ export const shouldShowBoundingBox = (
     return true;
   }
 
-  return element.points.length > 2;
+  // on mobile/tablet we currently don't show bbox because of resize issues
+  // (also prob best for simplicity's sake)
+  return element.points.length > 2 && !isMobileOrTablet();
 };

packages/element/tests/binding.test.tsx

@@ -10,6 +10,8 @@ import { API } from "@excalidraw/excalidraw/tests/helpers/api";
 import { UI, Pointer, Keyboard } from "@excalidraw/excalidraw/tests/helpers/ui";
 import { fireEvent, render } from "@excalidraw/excalidraw/tests/test-utils";
 
+import { LinearElementEditor } from "@excalidraw/element";
+
 import { getTransformHandles } from "../src/transformHandles";
 import {
   getTextEditor,
@@ -413,16 +415,12 @@ describe("element binding", () => {
     expect(arrow.endBinding?.elementId).toBe(rectRight.id);
 
     // Drag arrow off of bound rectangle range
-    const handles = getTransformHandles(
+    const [elX, elY] = LinearElementEditor.getPointAtIndexGlobalCoordinates(
       arrow,
-      h.state.zoom,
-      arrayToMap(h.elements),
-      "mouse",
-    ).se!;
-
+      -1,
+      h.scene.getNonDeletedElementsMap(),
+    );
     Keyboard.keyDown(KEYS.CTRL_OR_CMD);
-    const elX = handles[0] + handles[2] / 2;
-    const elY = handles[1] + handles[3] / 2;
     mouse.downAt(elX, elY);
     mouse.moveTo(300, 400);
     mouse.up();

packages/excalidraw/components/App.tsx

@@ -173,7 +173,7 @@ import {
   getContainerElement,
   isValidTextContainer,
   redrawTextBoundingBox,
-  shouldShowBoundingBox,
+  hasBoundingBox,
   getFrameChildren,
   isCursorInFrame,
   addElementsToFrame,
@@ -5262,7 +5262,7 @@ class App extends React.Component<AppProps, AppState> {
     if (
       considerBoundingBox &&
       this.state.selectedElementIds[element.id] &&
-      shouldShowBoundingBox([element], this.state)
+      hasBoundingBox([element], this.state)
     ) {
       // if hitting the bounding box, return early
       // but if not, we should check for other cases as well (e.g. frame name)
@@ -6165,7 +6165,13 @@ class App extends React.Component<AppProps, AppState> {
         (!this.state.selectedLinearElement ||
           this.state.selectedLinearElement.hoverPointIndex === -1) &&
         this.state.openDialog?.name !== "elementLinkSelector" &&
-        !(selectedElements.length === 1 && isElbowArrow(selectedElements[0]))
+        !(selectedElements.length === 1 && isElbowArrow(selectedElements[0])) &&
+        // HACK: Disable transform handles for linear elements on mobile until a
+        // better way of showing them is found
+        !(
+          isLinearElement(selectedElements[0]) &&
+          (isMobileOrTablet() || selectedElements[0].points.length === 2)
+        )
       ) {
         const elementWithTransformHandleType =
           getElementWithTransformHandleType(
@@ -7285,14 +7291,8 @@ class App extends React.Component<AppProps, AppState> {
         !this.state.selectedLinearElement?.isEditing &&
         !isElbowArrow(selectedElements[0]) &&
         !(
-          isLineElement(selectedElements[0]) &&
-          LinearElementEditor.getPointIndexUnderCursor(
-            selectedElements[0],
-            elementsMap,
-            this.state.zoom,
-            pointerDownState.origin.x,
-            pointerDownState.origin.y,
-          ) !== -1
+          isLinearElement(selectedElements[0]) &&
+          (isMobileOrTablet() || selectedElements[0].points.length === 2)
         ) &&
         !(
           this.state.selectedLinearElement &&

packages/excalidraw/renderer/interactiveScene.ts

@@ -22,7 +22,7 @@ import {
   getOmitSidesForDevice,
   getTransformHandles,
   getTransformHandlesFromCoords,
-  shouldShowBoundingBox,
+  hasBoundingBox,
 } from "@excalidraw/element";
 import {
   isElbowArrow,
@@ -892,7 +892,7 @@ const _renderInteractiveScene = ({
 
   // Paint selected elements
   if (!appState.multiElement && !appState.selectedLinearElement?.isEditing) {
-    const showBoundingBox = shouldShowBoundingBox(selectedElements, appState);
+    const showBoundingBox = hasBoundingBox(selectedElements, appState);
 
     const isSingleLinearElementSelected =
       selectedElements.length === 1 && isLinearElement(selectedElements[0]);