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_SESSIONS_SESSION_ID_H_ 6 #define CHROME_BROWSER_SESSIONS_SESSION_ID_H_ 7 8 #include "base/basictypes.h" 9 10 namespace content { 11 class WebContents; 12 } 13 14 // Uniquely identifies a tab or window for the duration of a session. 15 class SessionID { 16 public: 17 typedef int32 id_type; 18 19 SessionID(); 20 ~SessionID() {} 21 22 // If the specified WebContents has a SessionTabHelper (probably because it 23 // was used as the contents of a tab), returns a tab id. This value is 24 // immutable for a given tab. It will be unique across Chrome within the 25 // current session, but may be re-used across sessions. Returns -1 26 // for a NULL WebContents or if the WebContents has no SessionTabHelper. 27 static id_type IdForTab(const content::WebContents* tab); 28 29 // If the specified WebContents has a SessionTabHelper (probably because it 30 // was used as the contents of a tab), and has ever been attached to a Browser 31 // window, returns Browser::session_id().id() for that Browser. If the tab is 32 // being dragged between Browser windows, returns the old window's id value. 33 // If the WebContents has a SessionTabHelper but has never been attached to a 34 // Browser window, returns an id value that is different from that of any 35 // Browser. Returns -1 for a NULL WebContents or if the WebContents has no 36 // SessionTabHelper. 37 static id_type IdForWindowContainingTab(const content::WebContents* tab); 38 39 // Returns the underlying id. 40 void set_id(id_type id) { id_ = id; } 41 id_type id() const { return id_; } 42 43 private: 44 id_type id_; 45 }; 46 47 #endif // CHROME_BROWSER_SESSIONS_SESSION_ID_H_ 48
