Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/gestures/motion_event_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_GESTURE_DETECTION_UI_MOTION_EVENT_H_
 #define UI_EVENTS_GESTURE_DETECTION_UI_MOTION_EVENT_H_
 
 #include <map>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "ui/events/event.h"
 #include "ui/events/events_export.h"
-#include "ui/events/gesture_detection/motion_event.h"
+#include "ui/events/gesture_detection/motion_event_generic.h"
 
 namespace ui {
 
 // Implementation of MotionEvent which takes a stream of ui::TouchEvents.
-class EVENTS_EXPORT MotionEventImpl : public MotionEvent {
+class EVENTS_EXPORT MotionEventImpl : public MotionEventGeneric {
  public:
   MotionEventImpl();
   ~MotionEventImpl() override;
 
-  void OnTouch(const TouchEvent& touch);
+  // MotionEventGeneric:
+  int GetSourceDeviceId(size_t pointer_index) const override;
 
-  // MotionEvent implementation.
-  int GetId() const override;
-  Action GetAction() const override;
-  int GetActionIndex() const override;
-  size_t GetPointerCount() const override;
-  int GetPointerId(size_t pointer_index) const override;
-  float GetX(size_t pointer_index) const override;
-  float GetY(size_t pointer_index) const override;
-  float GetRawX(size_t pointer_index) const override;
-  float GetRawY(size_t pointer_index) const override;
-  float GetTouchMajor(size_t pointer_index) const override;
-  float GetTouchMinor(size_t pointer_index) const override;
-  float GetOrientation(size_t pointer_index) const override;
-  float GetPressure(size_t pointer_index) const override;
-  ToolType GetToolType(size_t pointer_index) const override;
-  int GetButtonState() const override;
-  int GetFlags() const override;
-  base::TimeTicks GetEventTime() const override;
-
-  scoped_ptr<MotionEvent> Clone() const override;
-  scoped_ptr<MotionEvent> Cancel() const override;
-
-  int GetSourceDeviceId(size_t pointer_index) const;
+  // Returns true iff the touch was valid.
+  bool OnTouch(const TouchEvent& touch);
 
   // We can't cleanup removed touch points immediately upon receipt of a
   // TouchCancel or TouchRelease, as the MotionEvent needs to be able to report
   // information about those touch events. Once the MotionEvent has been
   // processed, we call CleanupRemovedTouchPoints to do the required
   // book-keeping.
   void CleanupRemovedTouchPoints(const TouchEvent& event);
 
  private:
-  struct PointData {
-    PointData();
-    float x;
-    float y;
-    float raw_x;
-    float raw_y;
-    int touch_id;
-    float pressure;
-    int source_device_id;
-    float touch_major;
-    float touch_minor;
-    float orientation;
-  };
-
-  MotionEventImpl(
-      size_t pointer_count,
-      const base::TimeTicks& last_touch_time,
-      Action cached_action,
-      int cached_action_index,
-      int flags,
-      const PointData (&active_touches)[MotionEvent::MAX_TOUCH_POINT_COUNT]);
-
-  static PointData GetPointDataFromTouchEvent(const TouchEvent& touch);
   void AddTouch(const TouchEvent& touch);
   void UpdateTouch(const TouchEvent& touch);
   void UpdateCachedAction(const TouchEvent& touch);
-  size_t GetIndexFromId(int id) const;
-
-  size_t pointer_count_;
-  base::TimeTicks last_touch_time_;
-  Action cached_action_;
-  // The index of the touch responsible for last ACTION_POINTER_DOWN or
-  // ACTION_POINTER_UP. -1 if no such action has occurred.
-  int cached_action_index_;
-  int flags_;
-
-  // We want constant time indexing by pointer_index, and fast indexing by id.
-  PointData active_touches_[MotionEvent::MAX_TOUCH_POINT_COUNT];
+  int GetIndexFromId(int id) const;
 
   DISALLOW_COPY_AND_ASSIGN(MotionEventImpl);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_UI_MOTION_EVENT_H_