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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_GPU_COMPOSITOR_THREAD_H_
#define CONTENT_RENDERER_GPU_COMPOSITOR_THREAD_H_
#include <map>
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "content/renderer/render_view_impl.h"
#include "ipc/ipc_channel_proxy.h"
#include "webkit/glue/webthread_impl.h"
namespace WebKit {
class WebInputEvent;
}
class InputEventFilter;
// The CompositorThread class manages the background thread for the compositor.
// The CompositorThread instance can be assumed to outlive the background
// thread it manages.
class CompositorThread {
public:
// |main_listener| refers to the central IPC message listener that lives on
// the main thread, where all incoming IPC messages are first handled.
explicit CompositorThread(IPC::Channel::Listener* main_listener);
~CompositorThread();
// This MessageFilter should be added to allow input events to be redirected
// to the compositor's thread.
IPC::ChannelProxy::MessageFilter* GetMessageFilter() const;
// Callable from the main thread only.
void AddInputHandler(int routing_id,
int input_handler_id,
const base::WeakPtr<RenderViewImpl>& render_view_impl);
webkit_glue::WebThreadImpl* GetWebThread() { return &thread_; }
private:
// Callback only from the compositor's thread.
void RemoveInputHandler(int routing_id);
// Called from the compositor's thread.
void HandleInputEvent(int routing_id,
const WebKit::WebInputEvent* input_event);
// Called from the compositor's thread.
void AddInputHandlerOnCompositorThread(
int routing_id,
int input_handler_id,
scoped_refptr<base::MessageLoopProxy> main_loop,
const base::WeakPtr<RenderViewImpl>& render_view_impl);
class InputHandlerWrapper;
friend class InputHandlerWrapper;
typedef std::map<int, // routing_id
scoped_refptr<InputHandlerWrapper> > InputHandlerMap;
InputHandlerMap input_handlers_;
webkit_glue::WebThreadImpl thread_;
scoped_refptr<InputEventFilter> filter_;
};
#endif // CONTENT_RENDERER_GPU_COMPOSITOR_THREAD_H_
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