Unified Gesture Recognizer

ui/events/gestures/gesture_recognizer_impl.h

 // Copyright (c) 2012 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_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 #define UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 
 #include <map>
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/events_export.h"
+#include "ui/events/gesture_detection/ui_gesture_provider.h"
 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/events/gestures/gesture_sequence.h"
 #include "ui/gfx/point.h"
 
 namespace ui {
 class GestureConsumer;
 class GestureEvent;
 class GestureEventHelper;
 class GestureSequence;
 class TouchEvent;
 
+// TODO(tdresser): Once the unified gesture recognition process sticks
+// (crbug.com/332418), GestureRecognizerImpl can be cleaned up
+// significantly.
 class EVENTS_EXPORT GestureRecognizerImpl : public GestureRecognizer,
-                                            public GestureSequenceDelegate {
+                                            public GestureSequenceDelegate,
+                                            public UIGestureProviderClient {
  public:
   typedef std::map<int, GestureConsumer*> TouchIdToConsumerMap;
 
   GestureRecognizerImpl();
   virtual ~GestureRecognizerImpl();
 
   std::vector<GestureEventHelper*>& helpers() { return helpers_; }
 
   // Overridden from GestureRecognizer
   virtual GestureConsumer* GetTouchLockedTarget(
       const TouchEvent& event) OVERRIDE;
   virtual GestureConsumer* GetTargetForGestureEvent(
       const GestureEvent& event) OVERRIDE;
   virtual GestureConsumer* GetTargetForLocation(
       const gfx::PointF& location, int source_device_id) OVERRIDE;
   virtual void TransferEventsTo(GestureConsumer* current_consumer,
                                 GestureConsumer* new_consumer) OVERRIDE;
   virtual bool GetLastTouchPointForTarget(GestureConsumer* consumer,
                                           gfx::PointF* point) OVERRIDE;
   virtual bool CancelActiveTouches(GestureConsumer* consumer) OVERRIDE;
 
  protected:
-  virtual GestureSequence* CreateSequence(GestureSequenceDelegate* delegate);
   virtual GestureSequence* GetGestureSequenceForConsumer(GestureConsumer* c);
+  virtual UIGestureProvider* GetGestureProviderForConsumer(GestureConsumer* c);
+  virtual GestureSequence* CreateSequence(
+      ui::GestureSequenceDelegate* delegate);
 
  private:
   // Sets up the target consumer for gestures based on the touch-event.
   void SetupTargets(const TouchEvent& event, GestureConsumer* consumer);
   void CancelTouches(std::vector<std::pair<int, GestureConsumer*> >* touches);
 
+  void DispatchGestureEvent(GestureEvent* event);
+
   // Overridden from GestureRecognizer
   virtual Gestures* ProcessTouchEventForGesture(
       const TouchEvent& event,
       ui::EventResult result,
       GestureConsumer* target) OVERRIDE;
   virtual bool CleanupStateForConsumer(GestureConsumer* consumer)
       OVERRIDE;
   virtual void AddGestureEventHelper(GestureEventHelper* helper) OVERRIDE;
   virtual void RemoveGestureEventHelper(GestureEventHelper* helper) OVERRIDE;
 
   // Overridden from ui::GestureSequenceDelegate.
   virtual void DispatchPostponedGestureEvent(GestureEvent* event) OVERRIDE;
 
+  // Overridden from UIGestureProviderClient
+  virtual void OnGestureEvent(GestureEvent* event) OVERRIDE;
+
   // Convenience method to find the GestureEventHelper that can dispatch events
   // to a specific |consumer|.
   GestureEventHelper* FindDispatchHelperForConsumer(GestureConsumer* consumer);
 
   std::map<GestureConsumer*, GestureSequence*> consumer_sequence_;
+  std::map<GestureConsumer*, UIGestureProvider*> consumer_gesture_provider_;
 
   // Both |touch_id_target_| and |touch_id_target_for_gestures_| map a touch-id
   // to its target window.  touch-ids are removed from |touch_id_target_| on
   // ET_TOUCH_RELEASE and ET_TOUCH_CANCEL. |touch_id_target_for_gestures_| are
   // removed in ConsumerDestroyed().
   TouchIdToConsumerMap touch_id_target_;
   TouchIdToConsumerMap touch_id_target_for_gestures_;
 
   std::vector<GestureEventHelper*> helpers_;
 
+  bool use_unified_gesture_detector_;
+
   DISALLOW_COPY_AND_ASSIGN(GestureRecognizerImpl);
 };
 
 // Provided only for testing:
 EVENTS_EXPORT void SetGestureRecognizerForTesting(
     GestureRecognizer* gesture_recognizer);
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_