1 // Copyright (c) 2011 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_SESSIONS_SESSION_TAB_HELPER_H_ 6 #define CHROME_BROWSER_SESSIONS_SESSION_TAB_HELPER_H_ 7 8 #include "base/basictypes.h" 9 #include "chrome/browser/sessions/session_id.h" 10 #include "content/public/browser/web_contents_observer.h" 11 #include "content/public/browser/web_contents_user_data.h" 12 13 // This class keeps the extension API's windowID up-to-date with the current 14 // window of the tab. 15 class SessionTabHelper : public content::WebContentsObserver, 16 public content::WebContentsUserData<SessionTabHelper> { 17 public: 18 virtual ~SessionTabHelper(); 19 20 // Returns the identifier used by session restore for this tab. session_id()21 const SessionID& session_id() const { return session_id_; } 22 23 // Identifier of the window the tab is in. 24 void SetWindowID(const SessionID& id); window_id()25 const SessionID& window_id() const { return window_id_; } 26 27 // content::WebContentsObserver: 28 virtual void RenderViewCreated( 29 content::RenderViewHost* render_view_host) OVERRIDE; 30 virtual void UserAgentOverrideSet(const std::string& user_agent) OVERRIDE; 31 32 private: 33 explicit SessionTabHelper(content::WebContents* contents); 34 friend class content::WebContentsUserData<SessionTabHelper>; 35 36 // Unique identifier of the tab for session restore. This id is only unique 37 // within the current session, and is not guaranteed to be unique across 38 // sessions. 39 const SessionID session_id_; 40 41 // Unique identifier of the window the tab is in. 42 SessionID window_id_; 43 44 DISALLOW_COPY_AND_ASSIGN(SessionTabHelper); 45 }; 46 47 #endif // CHROME_BROWSER_SESSIONS_SESSION_TAB_HELPER_H_ 48