src/content/browser/android/in_process/synchronous_input_event_filter.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_ANDROID_IN_PROCESS_SYNCHRONOUS_INPUT_EVENT_FILTER_H_
   6 #define CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_INPUT_EVENT_FILTER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback.h"
  10 #include "base/compiler_specific.h"
  11 #include "content/common/input/input_event_ack_state.h"
  12 #include "content/renderer/input/input_handler_manager_client.h"
  13 #include "ui/gfx/vector2d_f.h"
  14
  15 namespace blink {
  16 class WebInputEvent;
  17 }
  18
  19 namespace content {
  20
  21 // This class perform synchronous, in-process InputEvent handling.
  22 //
  23 // The provided |handler| process WebInputEvents synchronously on the merged
  24 // UI and compositing thread. If the event goes unhandled, that is reflected in
  25 // the InputEventAckState; no forwarding is performed.
  26 class SynchronousInputEventFilter : public InputHandlerManagerClient {
  27  public:
  28   SynchronousInputEventFilter();
  29   virtual ~SynchronousInputEventFilter();
  30
  31   InputEventAckState HandleInputEvent(int routing_id,
  32                                       const blink::WebInputEvent& input_event);
  33
  34   // InputHandlerManagerClient implementation.
  35   virtual void SetBoundHandler(const Handler& handler) override;
  36   virtual void DidAddInputHandler(int routing_id,
  37                                   cc::InputHandler* input_handler) override;
  38   virtual void DidRemoveInputHandler(int routing_id) override;
  39   virtual void DidOverscroll(int routing_id,
  40                              const DidOverscrollParams& params) override;
  41   virtual void DidStopFlinging(int routing_id) override;
  42
  43  private:
  44   void SetBoundHandlerOnUIThread(const Handler& handler);
  45
  46   Handler handler_;
  47 };
  48
  49 }  // namespace content
  50
  51 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_INPUT_EVENT_FILTER_H_