| // Copyright 2013 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_TOUCHSCREEN_TAP_SUPPRESSION_CONTROLLER_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCHSCREEN_TAP_SUPPRESSION_CONTROLLER_H_ |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "content/browser/renderer_host/input/gesture_event_filter.h" |
| #include "content/browser/renderer_host/input/tap_suppression_controller_client.h" |
| |
| namespace content { |
| |
| class GestureEventFilter; |
| class TapSuppressionController; |
| |
| // Controls the suppression of touchscreen taps immediately following the |
| // dispatch of a GestureFlingCancel event. |
| class TouchscreenTapSuppressionController |
| : public TapSuppressionControllerClient { |
| public: |
| explicit TouchscreenTapSuppressionController(GestureEventFilter* gef); |
| virtual ~TouchscreenTapSuppressionController(); |
| |
| // Should be called on arrival of GestureFlingCancel events. |
| void GestureFlingCancel(); |
| |
| // Should be called on arrival of ACK for a GestureFlingCancel event. |
| // |processed| is true if the GestureFlingCancel successfully stopped a fling. |
| void GestureFlingCancelAck(bool processed); |
| |
| // Should be called on arrival of GestureTapDown events. Returns true if the |
| // caller should stop normal handling of the GestureTapDown. In this case, the |
| // caller is responsible for saving the event for later use, if needed. |
| bool ShouldDeferGestureTapDown(const GestureEventWithLatencyInfo& event); |
| |
| // Should be called on arrival of GestureTap events. Returns true if the |
| // caller should stop normal handling of the GestureTap. |
| bool ShouldSuppressGestureTap(); |
| |
| // Should be called on arrival of GestureTapCancel events. Returns true if the |
| // caller should stop normal handling of the GestureTapCancel. |
| bool ShouldSuppressGestureTapCancel(); |
| |
| private: |
| // TapSuppressionControllerClient implementation. |
| virtual int MaxCancelToDownTimeInMs() OVERRIDE; |
| virtual int MaxTapGapTimeInMs() OVERRIDE; |
| virtual void DropStashedTapDown() OVERRIDE; |
| virtual void ForwardStashedTapDown() OVERRIDE; |
| |
| GestureEventFilter* gesture_event_filter_; |
| GestureEventWithLatencyInfo stashed_tap_down_; |
| |
| // The core controller of tap suppression. |
| scoped_ptr<TapSuppressionController> controller_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TouchscreenTapSuppressionController); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCHSCREEN_TAP_SUPPRESSION_CONTROLLER_H_ |