Make the ContentGestureProvider a ui::FilteredGestureProvider

content/browser/renderer_host/input/content_gesture_provider.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 CONTENT_BROWSER_RENDERER_HOST_INPUT_CONTENT_GESTURE_PROVIDER_H_
-#define CONTENT_BROWSER_RENDERER_HOST_INPUT_CONTENT_GESTURE_PROVIDER_H_
-
-#include "base/basictypes.h"
-#include "content/port/common/input_event_ack_state.h"
-#include "ui/events/gesture_detection/gesture_event_data_packet.h"
-#include "ui/events/gesture_detection/gesture_provider.h"
-#include "ui/events/gesture_detection/touch_disposition_gesture_filter.h"
-
-namespace blink {
-class WebGestureEvent;
-}
-
-namespace content {
-
-class ContentGestureProviderClient {
- public:
-  virtual ~ContentGestureProviderClient() {}
-  virtual void OnGestureEvent(const blink::WebGestureEvent& event) = 0;
-};
-
-// Provides gesture detection and dispatch given a sequence of touch events
-// and touch event acks.
-class ContentGestureProvider : public ui::TouchDispositionGestureFilterClient,
-                               public ui::GestureProviderClient {
- public:
-  // TODO(jdduke): Move the scaling constant out of this class, instead hosting
-  // it on the generating MotionEvent.
-  ContentGestureProvider(ContentGestureProviderClient* client,
-                         float touch_to_gesture_scale);
-
-  // Returns true if |event| was both valid and successfully handled by the
-  // gesture detector.  Otherwise, returns false, in which case the caller
-  // should drop |event|, not forwarding it to the renderer.
-  bool OnTouchEvent(const ui::MotionEvent& event);
-
-  // To be called upon ack of an event that was forwarded after a successful
-  // call to |OnTouchEvent()|.
-  void OnTouchEventAck(InputEventAckState ack_state);
-
-  // Methods delegated to |gesture_provider_|.
-  void ResetGestureDetectors();
-  void SetMultiTouchSupportEnabled(bool enabled);
-  void SetDoubleTapSupportForPlatformEnabled(bool enabled);
-  void SetDoubleTapSupportForPageEnabled(bool enabled);
-  const ui::MotionEvent* GetCurrentDownEvent() const;
-
- private:
-  // ui::GestureProviderClient
-  virtual void OnGestureEvent(const ui::GestureEventData& event) OVERRIDE;
-
-  // TouchDispositionGestureFilterClient
-  virtual void ForwardGestureEvent(const ui::GestureEventData& event) OVERRIDE;
-
-  ContentGestureProviderClient* const client_;
-  float touch_to_gesture_scale_;
-
-  ui::GestureProvider gesture_provider_;
-  ui::TouchDispositionGestureFilter gesture_filter_;
-
-  bool handling_event_;
-  ui::GestureEventDataPacket pending_gesture_packet_;
-
-  DISALLOW_COPY_AND_ASSIGN(ContentGestureProvider);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_CONTENT_GESTURE_PROVIDER_H_