chrome/browser/sessions/session_tab_helper.h

   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.
  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);
  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_