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// Copyright 2013 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_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
#define CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "content/common/content_export.h"
#include "ipc/ipc_listener.h"
#include "ipc/ipc_sender.h"
namespace content {
class RendererPpapiHost;
class RenderFrame;
class RenderFrameImpl;
// Base class for objects that want to filter incoming IPCs, and also get
// notified of changes to the frame.
class CONTENT_EXPORT RenderFrameObserver : public IPC::Listener,
public IPC::Sender {
public:
// By default, observers will be deleted when the RenderFrame goes away. If
// they want to outlive it, they can override this function.
virtual void OnDestruct();
// Called when a Pepper plugin is created.
virtual void DidCreatePepperPlugin(RendererPpapiHost* host) {}
// IPC::Listener implementation.
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
// IPC::Sender implementation.
virtual bool Send(IPC::Message* message) OVERRIDE;
RenderFrame* render_frame() const;
int routing_id() const { return routing_id_; }
protected:
explicit RenderFrameObserver(RenderFrame* render_frame);
virtual ~RenderFrameObserver();
private:
friend class RenderFrameImpl;
// This is called by the RenderFrame when it's going away so that this object
// can null out its pointer.
void RenderFrameGone();
RenderFrame* render_frame_;
// The routing ID of the associated RenderFrame.
int routing_id_;
DISALLOW_COPY_AND_ASSIGN(RenderFrameObserver);
};
} // namespace content
#endif // CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
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