| // 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_BROWSER_MESSAGE_PORT_MESSAGE_FILTER_H_ |
| #define CONTENT_BROWSER_MESSAGE_PORT_MESSAGE_FILTER_H_ |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "content/common/content_export.h" |
| #include "content/public/browser/browser_message_filter.h" |
| #include "content/public/browser/message_port_delegate.h" |
| |
| // Windows headers will redefine SendMessage. |
| #ifdef SendMessage |
| #undef SendMessage |
| #endif |
| |
| struct FrameMsg_PostMessage_Params; |
| |
| namespace content { |
| struct TransferredMessagePort; |
| |
| // Filter for MessagePort related IPC messages (creating and destroying a |
| // MessagePort, sending a message via a MessagePort etc). |
| class CONTENT_EXPORT MessagePortMessageFilter |
| : public MessagePortDelegate, |
| public BrowserMessageFilter { |
| public: |
| typedef base::Callback<int(void)> NextRoutingIDCallback; |
| |
| // |next_routing_id| is owned by this object. It can be used up until |
| // OnChannelClosing. |
| explicit MessagePortMessageFilter(const NextRoutingIDCallback& callback); |
| |
| // BrowserMessageFilter implementation. |
| void OnChannelClosing() override; |
| bool OnMessageReceived(const IPC::Message& message) override; |
| void OnDestruct() const override; |
| |
| int GetNextRoutingID(); |
| |
| // MessagePortDelegate implementation. |
| void SendMessage( |
| int route_id, |
| const MessagePortMessage& message, |
| const std::vector<TransferredMessagePort>& sent_message_ports) override; |
| void SendMessagesAreQueued(int route_id) override; |
| |
| // Updates message ports registered for |message_ports| and returns |
| // new routing IDs for the updated ports via |new_routing_ids|. |
| void UpdateMessagePortsWithNewRoutes( |
| const std::vector<TransferredMessagePort>& message_ports, |
| std::vector<int>* new_routing_ids); |
| |
| void RouteMessageEventWithMessagePorts( |
| int routing_id, |
| const FrameMsg_PostMessage_Params& params); |
| |
| protected: |
| // This is protected, so we can define sub classes for testing. |
| ~MessagePortMessageFilter() override; |
| |
| private: |
| friend class BrowserThread; |
| friend class base::DeleteHelper<MessagePortMessageFilter>; |
| |
| // Message handlers. |
| void OnCreateMessagePort(int* route_id, int* message_port_id); |
| |
| // This is guaranteed to be valid until OnChannelClosing is invoked, and it's |
| // not used after. |
| NextRoutingIDCallback next_routing_id_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(MessagePortMessageFilter); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_MESSAGE_PORT_MESSAGE_FILTER_H_ |