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// Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_MESSAGE_HANDLER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_MESSAGE_HANDLER_H_
#pragma once
#include <string>
#include "content/public/browser/render_view_host_observer.h"
// Filters and dispatches extension-related IPC messages that arrive from
// renderers. There is one of these objects for each RenderViewHost in Chrome.
// Contrast this with ExtensionTabHelper, which is only created for TabContents.
//
// TODO(aa): Handling of content script messaging should be able to move to EFD
// once there is an EFD for every RVHD where extension code can run. Then we
// could eliminate this class. Right now, we don't end up with an EFD for tab
// contents unless that tab contents is hosting chrome-extension:// URLs. That
// still leaves content scripts. See also: crbug.com/80307.
class ExtensionMessageHandler : public content::RenderViewHostObserver {
public:
// |sender| is guaranteed to outlive this object.
explicit ExtensionMessageHandler(content::RenderViewHost* render_view_host);
virtual ~ExtensionMessageHandler();
// RenderViewHostObserver overrides.
virtual void RenderViewHostInitialized() OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
private:
// Message handlers.
void OnPostMessage(int port_id, const std::string& message);
DISALLOW_COPY_AND_ASSIGN(ExtensionMessageHandler);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_MESSAGE_HANDLER_H_
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