content/renderer/input/input_handler_manager.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_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_
   6 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_
   7
   8 #include "base/containers/scoped_ptr_hash_map.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "content/common/input/input_event_ack_state.h"
  12 #include "content/renderer/render_view_impl.h"
  13
  14 namespace base {
  15 class MessageLoopProxy;
  16 }
  17
  18 namespace cc {
  19 class InputHandler;
  20 struct InputHandlerScrollResult;
  21 }
  22
  23 namespace blink {
  24 class WebInputEvent;
  25 class WebMouseWheelEvent;
  26 }
  27
  28 namespace content {
  29
  30 class InputHandlerWrapper;
  31 class InputHandlerManagerClient;
  32 struct DidOverscrollParams;
  33 class RendererScheduler;
  34
  35 // InputHandlerManager class manages InputHandlerProxy instances for
  36 // the WebViews in this renderer.
  37 class InputHandlerManager {
  38  public:
  39   // |message_loop_proxy| is the MessageLoopProxy of the compositor thread. The
  40   // underlying MessageLoop and supplied |client| and the |renderer_scheduler|
  41   // must outlive this object. The RendererScheduler needs to know when input
  42   // events and fling animations occur, which is why it's passed in here.
  43   InputHandlerManager(
  44       const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
  45       InputHandlerManagerClient* client,
  46       RendererScheduler* renderer_scheduler);
  47   ~InputHandlerManager();
  48
  49   // Callable from the main thread only.
  50   void AddInputHandler(
  51       int routing_id,
  52       const base::WeakPtr<cc::InputHandler>& input_handler,
  53       const base::WeakPtr<RenderViewImpl>& render_view_impl);
  54
  55   void ObserveWheelEventAndResultOnMainThread(
  56       int routing_id,
  57       const blink::WebMouseWheelEvent& wheel_event,
  58       const cc::InputHandlerScrollResult& scroll_result);
  59
  60   // Callback only from the compositor's thread.
  61   void RemoveInputHandler(int routing_id);
  62
  63   // Called from the compositor's thread.
  64   InputEventAckState HandleInputEvent(int routing_id,
  65                                       const blink::WebInputEvent* input_event,
  66                                       ui::LatencyInfo* latency_info);
  67
  68   // Called from the compositor's thread.
  69   void DidOverscroll(int routing_id, const DidOverscrollParams& params);
  70
  71   // Called from the compositor's thread.
  72   void DidStopFlinging(int routing_id);
  73
  74   // Called from the compositor's thread.
  75   void DidReceiveInputEvent(const blink::WebInputEvent& web_input_event);
  76
  77   // Called from the compositor's thread.
  78   void DidAnimateForInput();
  79
  80  private:
  81   // Called from the compositor's thread.
  82   void AddInputHandlerOnCompositorThread(
  83       int routing_id,
  84       const scoped_refptr<base::MessageLoopProxy>& main_loop,
  85       const base::WeakPtr<cc::InputHandler>& input_handler,
  86       const base::WeakPtr<RenderViewImpl>& render_view_impl);
  87
  88   void ObserveWheelEventAndResultOnCompositorThread(
  89       int routing_id,
  90       const blink::WebMouseWheelEvent& wheel_event,
  91       const cc::InputHandlerScrollResult& scroll_result);
  92
  93   typedef base::ScopedPtrHashMap<int,  // routing_id
  94                                  InputHandlerWrapper> InputHandlerMap;
  95   InputHandlerMap input_handlers_;
  96
  97   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
  98   InputHandlerManagerClient* client_;
  99   RendererScheduler* renderer_scheduler_;  // Not owned.
 100 };
 101
 102 }  // namespace content
 103
 104 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_