1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_EXTENSIONS_MESSAGE_HANDLER_H_ 6 #define CHROME_BROWSER_EXTENSIONS_MESSAGE_HANDLER_H_ 7 8 #include <string> 9 10 #include "content/public/browser/render_view_host_observer.h" 11 12 namespace extensions { 13 14 // Filters and dispatches extension-related IPC messages that arrive from 15 // renderers. There is one of these objects for each RenderViewHost in Chrome. 16 // Contrast this with extensions::TabHelper, which is only created for 17 // WebContents. 18 // 19 // TODO(aa): Handling of content script messaging should be able to move to EFD 20 // once there is an EFD for every RVHD where extension code can run. Then we 21 // could eliminate this class. Right now, we don't end up with an EFD for tab 22 // contents unless that tab contents is hosting chrome-extension:// URLs. That 23 // still leaves content scripts. See also: crbug.com/80307. 24 class MessageHandler : public content::RenderViewHostObserver { 25 public: 26 // |sender| is guaranteed to outlive this object. 27 explicit MessageHandler(content::RenderViewHost* render_view_host); 28 virtual ~MessageHandler(); 29 30 // RenderViewHostObserver overrides. 31 virtual void RenderViewHostInitialized() OVERRIDE; 32 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 33 34 private: 35 // Message handlers. 36 void OnPostMessage(int port_id, const std::string& message); 37 38 DISALLOW_COPY_AND_ASSIGN(MessageHandler); 39 }; 40 41 } // namespace extensions 42 43 #endif // CHROME_BROWSER_EXTENSIONS_MESSAGE_HANDLER_H_ 44
