fix(iPad): Magic Mouse, click (#14188)

Signed-off-by: fufesou <linlong1266@gmail.com>

flutter/lib/common/widgets/remote_input.dart

@@ -107,6 +107,8 @@ class _RawTouchGestureDetectorRegionState
   // For mouse mode, we need to block the events when the cursor is in a blocked area.
   // So we need to cache the last tap down position.
   Offset? _lastTapDownPositionForMouseMode;
+  // Cache global position for onTap (which lacks position info).
+  Offset? _lastTapDownGlobalPosition;
 
   FFI get ffi => widget.ffi;
   FfiModel get ffiModel => widget.ffiModel;
@@ -136,6 +138,7 @@ class _RawTouchGestureDetectorRegionState
 
   onTapDown(TapDownDetails d) async {
     lastDeviceKind = d.kind;
+    _lastTapDownGlobalPosition = d.globalPosition;
     if (isNotTouchBasedDevice()) {
       return;
     }
@@ -154,6 +157,10 @@ class _RawTouchGestureDetectorRegionState
     if (isNotTouchBasedDevice()) {
       return;
     }
+    // Filter duplicate touch tap events on iOS (Magic Mouse issue).
+    if (inputModel.shouldIgnoreTouchTap(d.globalPosition)) {
+      return;
+    }
     if (handleTouch) {
       final isMoved =
           await ffi.cursorModel.move(d.localPosition.dx, d.localPosition.dy);
@@ -171,6 +178,11 @@ class _RawTouchGestureDetectorRegionState
     if (isNotTouchBasedDevice()) {
       return;
     }
+    // Filter duplicate touch tap events on iOS (Magic Mouse issue).
+    final lastPos = _lastTapDownGlobalPosition;
+    if (lastPos != null && inputModel.shouldIgnoreTouchTap(lastPos)) {
+      return;
+    }
     if (!handleTouch) {
       // Cannot use `_lastTapDownDetails` because Flutter calls `onTapUp` before `onTap`, clearing the cached details.
       // Using `_lastTapDownPositionForMouseMode` instead.

flutter/lib/models/input_model.dart

@@ -826,6 +826,9 @@ class InputModel {
   Map<String, dynamic> _getMouseEvent(PointerEvent evt, String type) {
     final Map<String, dynamic> out = {};
 
+    bool hasStaleButtonsOnMouseUp =
+        type == _kMouseEventUp && evt.buttons == _lastButtons;
+
     // Check update event type and set buttons to be sent.
     int buttons = _lastButtons;
     if (type == _kMouseEventMove) {
@@ -850,7 +853,7 @@ class InputModel {
         buttons = evt.buttons;
       }
     }
-    _lastButtons = evt.buttons;
+    _lastButtons = hasStaleButtonsOnMouseUp ? 0 : evt.buttons;
 
     out['buttons'] = buttons;
     out['type'] = type;
@@ -1218,6 +1221,28 @@ class InputModel {
     _trackpadLastDelta = Offset.zero;
   }
 
+  // iOS Magic Mouse duplicate event detection.
+  // When using Magic Mouse on iPad, iOS may emit both mouse and touch events
+  // for the same click in certain areas (like top-left corner).
+  int _lastMouseDownTimeMs = 0;
+  ui.Offset _lastMouseDownPos = ui.Offset.zero;
+
+  /// Check if a touch tap event should be ignored because it's a duplicate
+  /// of a recent mouse event (iOS Magic Mouse issue).
+  bool shouldIgnoreTouchTap(ui.Offset pos) {
+    if (!isIOS) return false;
+    final nowMs = DateTime.now().millisecondsSinceEpoch;
+    final dt = nowMs - _lastMouseDownTimeMs;
+    final distance = (_lastMouseDownPos - pos).distance;
+    // If touch tap is within 2000ms and 80px of the last mouse down,
+    // it's likely a duplicate event from the same Magic Mouse click.
+    if (dt >= 0 && dt < 2000 && distance < 80.0) {
+      debugPrint("shouldIgnoreTouchTap: IGNORED (dt=$dt, dist=$distance)");
+      return true;
+    }
+    return false;
+  }
+
   void onPointDownImage(PointerDownEvent e) {
     debugPrint("onPointDownImage ${e.kind}");
     _stopFling = true;
@@ -1227,6 +1252,13 @@ class InputModel {
     if (isViewOnly && !showMyCursor) return;
     if (isViewCamera) return;
 
+    // Track mouse down events for duplicate detection on iOS.
+    final nowMs = DateTime.now().millisecondsSinceEpoch;
+    if (e.kind == ui.PointerDeviceKind.mouse) {
+      _lastMouseDownTimeMs = nowMs;
+      _lastMouseDownPos = e.position;
+    }
+
     if (_relativeMouse.enabled.value) {
       _relativeMouse.updatePointerRegionTopLeftGlobal(e);
     }