Support for Adaptive Handle Orientation

ui/touch_selection/touch_selection_controller.h

Index: ui/touch_selection/touch_selection_controller.h
diff --git a/ui/touch_selection/touch_selection_controller.h b/ui/touch_selection/touch_selection_controller.h
index abc75b59ce7f588b603d2148bcba957cfc304eec..84493b18265485151a7218278781574cd0544517 100644
--- a/ui/touch_selection/touch_selection_controller.h
+++ b/ui/touch_selection/touch_selection_controller.h
@@ -49,6 +49,10 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   void OnSelectionBoundsChanged(const SelectionBound& start,
                                 const SelectionBound& end);
 
+  // To be called when the viewport size has been changed. This is used for
+  // setting the state of the handles.
+  void OnViewportChanged(const gfx::RectF viewport_rect);
+
   // Allows touch-dragging of the handle.
   // Returns true iff the event was consumed, in which case the caller should
   // cease further handling of the event.
@@ -117,6 +121,8 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   bool GetEndVisible() const;
   TouchHandle::AnimationStyle GetAnimationStyle(bool was_active) const;
 
+  void SetInvertedOrientation();
+
   void LogSelectionEnd();
 
   TouchSelectionControllerClient* const client_;
@@ -148,6 +154,9 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   bool temporarily_hidden_;
 
+  gfx::RectF viewport_rect_;
+  bool viewport_size_changed_;
+
   base::TimeTicks selection_start_time_;
   // Whether a selection handle was dragged during the current 'selection
   // session' - i.e. since the current selection has been activated.