Adding synthetic touch/mouse drag [Part1]

content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h

 // 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_SMOOTH_SCROLL_GESTURE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_SCROLL_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/browser/renderer_host/input/synthetic_smooth_move_gesture.h"
+
 #include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
-#include "content/common/input/synthetic_web_input_event_builders.h"
-#include "third_party/WebKit/public/web/WebInputEvent.h"
-#include "ui/gfx/geometry/vector2d.h"
-#include "ui/gfx/geometry/vector2d_f.h"
 
 namespace content {
-
-// Simulates scrolling given a sequence of scroll distances as a continuous
-// gestures (i.e. when synthesizing touch events, the touch pointer is not
-// lifted when changing scroll direction).
-// If no distance is provided or the first one is 0, no touch events are
-// generated.
-// When synthesizing touch events, the first distance is extended to compensate
-// for the touch slop.
 class CONTENT_EXPORT SyntheticSmoothScrollGesture : public SyntheticGesture {
  public:
   explicit SyntheticSmoothScrollGesture(
       const SyntheticSmoothScrollGestureParams& params);
   ~SyntheticSmoothScrollGesture() override;
 
+  // SyntheticGesture implementation:
   SyntheticGesture::Result ForwardInputEvents(
       const base::TimeTicks& timestamp,
       SyntheticGestureTarget* target) override;
 
  private:
-  enum GestureState {
-    SETUP,
-    STARTED,
-    MOVING,
-    STOPPING,
-    DONE
-  };
+  static SyntheticSmoothMoveGestureParams::InputType GetInputSourceType(
+      SyntheticGestureParams::GestureSourceType gesture_source_type);
 
-  void ForwardTouchInputEvents(
-      const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
-  void ForwardMouseInputEvents(
-      const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
+  bool InitializeMoveGesture(
+      SyntheticGestureParams::GestureSourceType gesture_type,
+      SyntheticGestureTarget* target);
 
-  void ForwardTouchEvent(SyntheticGestureTarget* target,
-                         const base::TimeTicks& timestamp);
-  void ForwardMouseWheelEvent(SyntheticGestureTarget* target,
-                              const gfx::Vector2dF& delta,
-                              const base::TimeTicks& timestamp) const;
-
-  void PressTouchPoint(SyntheticGestureTarget* target,
-                       const base::TimeTicks& timestamp);
-  void MoveTouchPoint(SyntheticGestureTarget* target,
-                      const gfx::Vector2dF& delta,
-                      const base::TimeTicks& timestamp);
-  void ReleaseTouchPoint(SyntheticGestureTarget* target,
-                         const base::TimeTicks& timestamp);
-
-  void AddTouchSlopToFirstDistance(SyntheticGestureTarget* target);
-  gfx::Vector2dF GetPositionDeltaAtTime(const base::TimeTicks& timestamp)
-      const;
-  void ComputeNextScrollSegment();
-  base::TimeTicks ClampTimestamp(const base::TimeTicks& timestamp) const;
-  bool FinishedCurrentScrollSegment(const base::TimeTicks& timestamp) const;
-  bool IsLastScrollSegment() const;
-  bool ScrollIsNoOp() const;
-
+  scoped_ptr<SyntheticSmoothMoveGesture> move_gesture_;
   SyntheticSmoothScrollGestureParams params_;
-  // Used for mouse input.
-  gfx::Vector2d current_scroll_segment_total_delta_discrete_;
-  // Used for touch input.
-  gfx::Point current_scroll_segment_start_position_;
-  SyntheticWebTouchEvent touch_event_;
-  SyntheticGestureParams::GestureSourceType gesture_source_type_;
-  GestureState state_;
-  int current_scroll_segment_;
-  base::TimeTicks current_scroll_segment_start_time_;
-  base::TimeTicks current_scroll_segment_stop_time_;
-
-  DISALLOW_COPY_AND_ASSIGN(SyntheticSmoothScrollGesture);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_SCROLL_GESTURE_H_