content/browser/renderer_host/input/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_INPUT_SYNTHETIC_GESTURE_CONTROLLER_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_CONTROLLER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/memory/scoped_vector.h"
  10 #include "base/time/time.h"
  11 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  12 #include "content/common/content_export.h"
  13 #include "content/common/input/synthetic_gesture_params.h"
  14
  15 namespace content {
  16
  17 class SyntheticGestureTarget;
  18
  19 // Controls a synthetic gesture.
  20 // Repeatedly invokes the gesture object's ForwardInputEvent method to send
  21 // input events to the platform until the gesture has finished.
  22 class CONTENT_EXPORT SyntheticGestureController {
  23  public:
  24   explicit SyntheticGestureController(
  25       scoped_ptr<SyntheticGestureTarget> gesture_target);
  26   virtual ~SyntheticGestureController();
  27
  28   void QueueSyntheticGesture(
  29       scoped_ptr<SyntheticGesture> synthetic_gesture);
  30
  31   // Forward input events of the currently processed gesture.
  32   void Flush(base::TimeTicks timestamp);
  33
  34  private:
  35   void StartGesture(const SyntheticGesture& gesture);
  36   void StopGesture(const SyntheticGesture& gesture,
  37                    SyntheticGesture::Result result);
  38
  39   scoped_ptr<SyntheticGestureTarget> gesture_target_;
  40   ScopedVector<SyntheticGesture> pending_gesture_queue_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(SyntheticGestureController);
  43 };
  44
  45 }  // namespace content
  46
  47 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_CONTROLLER_H_