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 }
  21
  22 namespace blink {
  23 class WebInputEvent;
  24 }
  25
  26 namespace content {
  27
  28 class InputHandlerWrapper;
  29 class InputHandlerManagerClient;
  30 struct DidOverscrollParams;
  31 class RendererScheduler;
  32
  33 // InputHandlerManager class manages InputHandlerProxy instances for
  34 // the WebViews in this renderer.
  35 class InputHandlerManager {
  36  public:
  37   // |message_loop_proxy| is the MessageLoopProxy of the compositor thread. The
  38   // underlying MessageLoop and supplied |client| and the |renderer_scheduler|
  39   // must outlive this object. The RendererScheduler needs to know when input
  40   // events and fling animations occur, which is why it's passed in here.
  41   InputHandlerManager(
  42       const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
  43       InputHandlerManagerClient* client,
  44       RendererScheduler* renderer_scheduler);
  45   ~InputHandlerManager();
  46
  47   // Callable from the main thread only.
  48   void AddInputHandler(
  49       int routing_id,
  50       const base::WeakPtr<cc::InputHandler>& input_handler,
  51       const base::WeakPtr<RenderViewImpl>& render_view_impl);
  52
  53   // Callback only from the compositor's thread.
  54   void RemoveInputHandler(int routing_id);
  55
  56   // Called from the compositor's thread.
  57   InputEventAckState HandleInputEvent(int routing_id,
  58                                       const blink::WebInputEvent* input_event,
  59                                       ui::LatencyInfo* latency_info);
  60
  61   // Called from the compositor's thread.
  62   void DidOverscroll(int routing_id, const DidOverscrollParams& params);
  63
  64   // Called from the compositor's thread.
  65   void DidStopFlinging(int routing_id);
  66
  67   // Called from the compositor's thread.
  68   void DidReceiveInputEvent(blink::WebInputEvent::Type type);
  69
  70   // Called from the compositor's thread.
  71   void DidAnimateForInput();
  72
  73  private:
  74   // Called from the compositor's thread.
  75   void AddInputHandlerOnCompositorThread(
  76       int routing_id,
  77       const scoped_refptr<base::MessageLoopProxy>& main_loop,
  78       const base::WeakPtr<cc::InputHandler>& input_handler,
  79       const base::WeakPtr<RenderViewImpl>& render_view_impl);
  80
  81   typedef base::ScopedPtrHashMap<int,  // routing_id
  82                                  InputHandlerWrapper> InputHandlerMap;
  83   InputHandlerMap input_handlers_;
  84
  85   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
  86   InputHandlerManagerClient* client_;
  87   RendererScheduler* renderer_scheduler_;  // Not owned.
  88 };
  89
  90 }  // namespace content
  91
  92 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_