Re-enable Eager Gesture Recognition on Aura

ui/events/event.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_EVENT_H_
 #define UI_EVENTS_EVENT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/event_types.h"
@@ skipping 186 matching lines @@
   }
 
   // Convenience methods to cast |this| to a GestureEvent. IsGestureEvent()
   // must be true as a precondition to calling these methods.
   GestureEvent* AsGestureEvent();
   const GestureEvent* AsGestureEvent() const;
 
   // Returns true if the event has a valid |native_event_|.
   bool HasNativeEvent() const;
 
+  // Marks the event as not participating in synchronous gesture recognition.
+  void DisableSynchronousHandling();

[sadrul, 2014/12/07 17:25:44]

Can you move DisableSynchronousHandling() inside TouchEvent?

[tdresser, 2014/12/08 14:49:30]

Done.

+  bool synchronous_handling_disabled() const {
+    return !!(result_ & ER_DISABLE_SYNC_HANDLING);
+  }
+
   // Immediately stops the propagation of the event. This must be called only
   // from an EventHandler during an event-dispatch. Any event handler that may
   // be in the list will not receive the event after this is called.
   // Note that StopPropagation() can be called only for cancelable events.
   void StopPropagation();
   bool stopped_propagation() const { return !!(result_ & ER_CONSUMED); }
 
   // Marks the event as having been handled. A handled event does not reach the
   // next event phase. For example, if an event is handled during the pre-target
   // phase, then the event is dispatched to all pre-target handlers, but not to
@@ skipping 265 matching lines @@
  public:
   explicit TouchEvent(const base::NativeEvent& native_event);
 
   // Create a new TouchEvent which is identical to the provided model.
   // If source / target windows are provided, the model location will be
   // converted from |source| coordinate system to |target| coordinate system.
   template <class T>
   TouchEvent(const TouchEvent& model, T* source, T* target)
       : LocatedEvent(model, source, target),
         touch_id_(model.touch_id_),
+        unique_event_id_(model.unique_event_id_),
         radius_x_(model.radius_x_),
         radius_y_(model.radius_y_),
         rotation_angle_(model.rotation_angle_),
-        force_(model.force_) {
-  }
+        force_(model.force_) {}
 
   TouchEvent(EventType type,
              const gfx::PointF& location,
              int touch_id,
              base::TimeDelta time_stamp);
 
   TouchEvent(EventType type,
              const gfx::PointF& location,
              int flags,
              int touch_id,
              base::TimeDelta timestamp,
              float radius_x,
              float radius_y,
              float angle,
              float force);
 
   ~TouchEvent() override;
 
+  // The id of the pointer this event modifies.
   int touch_id() const { return touch_id_; }
+  // A unique identifier for this event.
+  uint64 unique_event_id() const { return unique_event_id_; }
   float radius_x() const { return radius_x_; }
   float radius_y() const { return radius_y_; }
   float rotation_angle() const { return rotation_angle_; }
   float force() const { return force_; }
 
   // Used for unit tests.
   void set_radius_x(const float r) { radius_x_ = r; }
   void set_radius_y(const float r) { radius_y_ = r; }
 
   // Overridden from LocatedEvent.
@@ skipping 10 matching lines @@
     rotation_angle_ = rotation_angle;
   }
 
   void set_force(float force) { force_ = force; }
 
  private:
   // The identity (typically finger) of the touch starting at 0 and incrementing
   // for each separable additional touch that the hardware can detect.
   const int touch_id_;
 
+  // A unique identifier for the touch event. Currently only used for
+  // checking equality of touch events for debugging purposes.
+  const uint64 unique_event_id_;

[sadrul, 2014/12/07 17:25:44]

Remove the second sentence.

[tdresser, 2014/12/08 14:49:30]

Good call. Done.

+
   // Radius of the X (major) axis of the touch ellipse. 0.0 if unknown.
   float radius_x_;
 
   // Radius of the Y (minor) axis of the touch ellipse. 0.0 if unknown.
   float radius_y_;
 
   // Angle of the major axis away from the X axis. Default 0.0.
   float rotation_angle_;
 
   // Force (pressure) of the touch. Normalized to be [0, 1]. Default to be 0.0.
@@ skipping 254 matching lines @@
 
   const GestureEventDetails& details() const { return details_; }
 
  private:
   GestureEventDetails details_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_