src/content/browser/renderer_host/synthetic_gesture_controller.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_SYNTHETIC_GESTURE_CONTROLLER_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_SYNTHETIC_GESTURE_CONTROLLER_H_
   7
   8 #include <map>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/time/time.h"
  12 #include "base/timer/timer.h"
  13 #include "content/common/content_export.h"
  14
  15 struct ViewHostMsg_BeginPinch_Params;
  16 struct ViewHostMsg_BeginSmoothScroll_Params;
  17
  18 namespace content {
  19
  20 class RenderWidgetHost;
  21 class RenderWidgetHostViewPort;
  22 class SyntheticGesture;
  23
  24 // Controls SyntheticGestures, used to inject synthetic events
  25 // for performance test harness.
  26 class CONTENT_EXPORT SyntheticGestureController {
  27  public:
  28   SyntheticGestureController();
  29   ~SyntheticGestureController();
  30
  31   // Initiates a synthetic event stream to simulate a smooth scroll.
  32   void BeginSmoothScroll(RenderWidgetHostViewPort* view,
  33                          const ViewHostMsg_BeginSmoothScroll_Params& params);
  34
  35   // Initiates a synthetic event stream to simulate a pinch-to-zoom.
  36   void BeginPinch(RenderWidgetHostViewPort* view,
  37                   const ViewHostMsg_BeginPinch_Params& params);
  38
  39   base::TimeDelta GetSyntheticGestureMessageInterval() const;
  40
  41  private:
  42   // Called periodically to advance the active scroll gesture after being
  43   // initiated by OnBeginSmoothScroll.
  44   void OnTimer();
  45
  46   base::RepeatingTimer<SyntheticGestureController> timer_;
  47
  48   RenderWidgetHost* rwh_;
  49
  50   scoped_refptr<SyntheticGesture> pending_synthetic_gesture_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(SyntheticGestureController);
  53 };
  54
  55 }  // namespace content
  56
  57 #endif  // CONTENT_BROWSER_RENDERER_HOST_SYNTHETIC_GESTURE_CONTROLLER_H_