content/browser/renderer_host/input/synthetic_pinch_gesture.h

   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   ~SyntheticPinchGesture() override;
  22
  23   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_