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// 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_SYNTHETIC_PINCH_GESTURE_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
#include "base/time/time.h"
#include "content/browser/renderer_host/input/synthetic_gesture.h"
#include "content/browser/renderer_host/input/synthetic_gesture_target.h"
#include "content/common/content_export.h"
#include "content/common/input/synthetic_pinch_gesture_params.h"
#include "content/common/input/synthetic_web_input_event_builders.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
namespace content {
class CONTENT_EXPORT SyntheticPinchGesture : public SyntheticGesture {
public:
explicit SyntheticPinchGesture(const SyntheticPinchGestureParams& params);
~SyntheticPinchGesture() override;
SyntheticGesture::Result ForwardInputEvents(
const base::TimeTicks& timestamp,
SyntheticGestureTarget* target) override;
private:
enum GestureState {
SETUP,
STARTED,
MOVING,
DONE
};
void ForwardTouchInputEvents(const base::TimeTicks& timestamp,
SyntheticGestureTarget* target);
void UpdateTouchPoints(const base::TimeTicks& timestamp);
void PressTouchPoints(SyntheticGestureTarget* target,
const base::TimeTicks& timestamp);
void MoveTouchPoints(SyntheticGestureTarget* target, float delta,
const base::TimeTicks& timestamp);
void ReleaseTouchPoints(SyntheticGestureTarget* target,
const base::TimeTicks& timestamp);
void ForwardTouchEvent(SyntheticGestureTarget* target,
const base::TimeTicks& timestamp);
void SetupCoordinatesAndStopTime(SyntheticGestureTarget* target);
float GetDeltaForPointer0AtTime(const base::TimeTicks& timestamp) const;
base::TimeTicks ClampTimestamp(const base::TimeTicks& timestamp) const;
bool HasReachedTarget(const base::TimeTicks& timestamp) const;
SyntheticPinchGestureParams params_;
float start_y_0_;
float start_y_1_;
float max_pointer_delta_0_;
SyntheticGestureParams::GestureSourceType gesture_source_type_;
GestureState state_;
SyntheticWebTouchEvent touch_event_;
base::TimeTicks start_time_;
base::TimeTicks stop_time_;
private:
DISALLOW_COPY_AND_ASSIGN(SyntheticPinchGesture);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
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