1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_ 7 8 #include "base/time/time.h" 9 #include "content/browser/renderer_host/input/synthetic_gesture.h" 10 #include "content/browser/renderer_host/input/synthetic_gesture_target.h" 11 #include "content/common/content_export.h" 12 #include "content/common/input/synthetic_pinch_gesture_params.h" 13 #include "content/common/input/synthetic_web_input_event_builders.h" 14 #include "third_party/WebKit/public/web/WebInputEvent.h" 15 16 namespace content { 17 18 class CONTENT_EXPORT SyntheticPinchGesture : public SyntheticGesture { 19 public: 20 explicit SyntheticPinchGesture(const SyntheticPinchGestureParams& params); 21 virtual ~SyntheticPinchGesture(); 22 23 virtual SyntheticGesture::Result ForwardInputEvents( 24 const base::TimeTicks& timestamp, 25 SyntheticGestureTarget* target) OVERRIDE; 26 27 private: 28 enum GestureState { 29 SETUP, 30 STARTED, 31 MOVING, 32 DONE 33 }; 34 35 void ForwardTouchInputEvents(const base::TimeTicks& timestamp, 36 SyntheticGestureTarget* target); 37 38 void UpdateTouchPoints(const base::TimeTicks& timestamp); 39 void PressTouchPoints(SyntheticGestureTarget* target, 40 const base::TimeTicks& timestamp); 41 void MoveTouchPoints(SyntheticGestureTarget* target, float delta, 42 const base::TimeTicks& timestamp); 43 void ReleaseTouchPoints(SyntheticGestureTarget* target, 44 const base::TimeTicks& timestamp); 45 void ForwardTouchEvent(SyntheticGestureTarget* target, 46 const base::TimeTicks& timestamp); 47 48 void SetupCoordinatesAndStopTime(SyntheticGestureTarget* target); 49 float GetDeltaForPointer0AtTime(const base::TimeTicks& timestamp) const; 50 base::TimeTicks ClampTimestamp(const base::TimeTicks& timestamp) const; 51 bool HasReachedTarget(const base::TimeTicks& timestamp) const; 52 53 SyntheticPinchGestureParams params_; 54 float start_y_0_; 55 float start_y_1_; 56 float max_pointer_delta_0_; 57 SyntheticGestureParams::GestureSourceType gesture_source_type_; 58 GestureState state_; 59 SyntheticWebTouchEvent touch_event_; 60 base::TimeTicks start_time_; 61 base::TimeTicks stop_time_; 62 63 private: 64 DISALLOW_COPY_AND_ASSIGN(SyntheticPinchGesture); 65 }; 66 67 } // namespace content 68 69 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_ 70