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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 "content/browser/tab_contents/tab_contents_observer.h"
#include "ipc/ipc_channel.h"
class ExtensionFunctionDispatcher;
class Profile;
struct ExtensionHostMsg_DomMessage_Params;
// Filters and dispatches extension-related IPC messages that arrive from
// renderer/extension processes. This object is created for renderers and also
// ExtensionHost/BackgroundContents. Contrast this with ExtensionTabHelper,
// which is only created for TabContents.
class ExtensionMessageHandler : public IPC::Channel::Listener {
public:
// |sender| is guaranteed to outlive this object.
ExtensionMessageHandler(int child_id,
IPC::Message::Sender* sender,
Profile* profile);
virtual ~ExtensionMessageHandler();
// IPC::Channel::Listener overrides.
virtual bool OnMessageReceived(const IPC::Message& message);
// Returns true iff the message can be dispatched.
bool CanDispatchRequest(int child_id,
int routing_id,
const ExtensionHostMsg_DomMessage_Params& params);
void set_extension_function_dispatcher(ExtensionFunctionDispatcher* e) {
extension_function_dispatcher_ = e;
}
private:
// Message handlers.
void OnPostMessage(int port_id, const std::string& message);
void OnRequest(const IPC::Message& message,
const ExtensionHostMsg_DomMessage_Params& params);
// The child id of the corresponding process. Can be 0.
int child_id_;
// Guaranteed to outlive this object.
IPC::Message::Sender* sender_;
ExtensionFunctionDispatcher* extension_function_dispatcher_;
Profile* profile_;
DISALLOW_COPY_AND_ASSIGN(ExtensionMessageHandler);
};
// A TabContentsObserver that forwards IPCs to ExtensionMessageHandler.
class ExtensionMessageObserver : public TabContentsObserver {
public:
explicit ExtensionMessageObserver(TabContents* tab_contents);
~ExtensionMessageObserver();
private:
// TabContentsObserver overrides.
virtual bool OnMessageReceived(const IPC::Message& message);
void OnRequest(const IPC::Message& message,
const ExtensionHostMsg_DomMessage_Params& params);
ExtensionMessageHandler handler_;
DISALLOW_COPY_AND_ASSIGN(ExtensionMessageObserver);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_MESSAGE_HANDLER_H_
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