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 SingleThreadTaskRunner;
  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 scheduler {
  29 class RendererScheduler;
  30 }
  31
  32 namespace content {
  33
  34 class InputHandlerWrapper;
  35 class InputHandlerManagerClient;
  36 struct DidOverscrollParams;
  37
  38 // InputHandlerManager class manages InputHandlerProxy instances for
  39 // the WebViews in this renderer.
  40 class InputHandlerManager {
  41  public:
  42   // |task_runner| is the SingleThreadTaskRunner of the compositor thread. The
  43   // underlying MessageLoop and supplied |client| and the |renderer_scheduler|
  44   // must outlive this object. The RendererScheduler needs to know when input
  45   // events and fling animations occur, which is why it's passed in here.
  46   InputHandlerManager(
  47       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
  48       InputHandlerManagerClient* client,
  49       scheduler::RendererScheduler* renderer_scheduler);
  50   ~InputHandlerManager();
  51
  52   // Callable from the main thread only.
  53   void AddInputHandler(
  54       int routing_id,
  55       const base::WeakPtr<cc::InputHandler>& input_handler,
  56       const base::WeakPtr<RenderViewImpl>& render_view_impl);
  57
  58   void ObserveWheelEventAndResultOnMainThread(
  59       int routing_id,
  60       const blink::WebMouseWheelEvent& wheel_event,
  61       const cc::InputHandlerScrollResult& scroll_result);
  62
  63   // Callback only from the compositor's thread.
  64   void RemoveInputHandler(int routing_id);
  65
  66   // Called from the compositor's thread.
  67   InputEventAckState HandleInputEvent(int routing_id,
  68                                       const blink::WebInputEvent* input_event,
  69                                       ui::LatencyInfo* latency_info);
  70
  71   // Called from the compositor's thread.
  72   void DidOverscroll(int routing_id, const DidOverscrollParams& params);
  73
  74   // Called from the compositor's thread.
  75   void DidStopFlinging(int routing_id);
  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::SingleThreadTaskRunner>& main_task_runner,
  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                                  scoped_ptr<InputHandlerWrapper>>
  95       InputHandlerMap;
  96   InputHandlerMap input_handlers_;
  97
  98   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  99   InputHandlerManagerClient* client_;
 100   scheduler::RendererScheduler* renderer_scheduler_;  // Not owned.
 101 };
 102
 103 }  // namespace content
 104
 105 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_