| // Copyright (c) 2012 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 CHROME_BROWSER_SESSIONS_SESSION_ID_H_ |
| #define CHROME_BROWSER_SESSIONS_SESSION_ID_H_ |
| |
| #include "base/basictypes.h" |
| |
| namespace content { |
| class WebContents; |
| } |
| |
| // Uniquely identifies a tab or window for the duration of a session. |
| class SessionID { |
| public: |
| typedef int32 id_type; |
| |
| SessionID(); |
| ~SessionID() {} |
| |
| // If the specified WebContents has a SessionTabHelper (probably because it |
| // was used as the contents of a tab), returns a tab id. This value is |
| // immutable for a given tab. It will be unique across Chrome within the |
| // current session, but may be re-used across sessions. Returns -1 |
| // for a NULL WebContents or if the WebContents has no SessionTabHelper. |
| static id_type IdForTab(const content::WebContents* tab); |
| |
| // If the specified WebContents has a SessionTabHelper (probably because it |
| // was used as the contents of a tab), and has ever been attached to a Browser |
| // window, returns Browser::session_id().id() for that Browser. If the tab is |
| // being dragged between Browser windows, returns the old window's id value. |
| // If the WebContents has a SessionTabHelper but has never been attached to a |
| // Browser window, returns an id value that is different from that of any |
| // Browser. Returns -1 for a NULL WebContents or if the WebContents has no |
| // SessionTabHelper. |
| static id_type IdForWindowContainingTab(const content::WebContents* tab); |
| |
| // Returns the underlying id. |
| void set_id(id_type id) { id_ = id; } |
| id_type id() const { return id_; } |
| |
| private: |
| id_type id_; |
| }; |
| |
| #endif // CHROME_BROWSER_SESSIONS_SESSION_ID_H_ |