Sessions API - previously Session Restore API. Supports restoring currently open foreign windows an…

chrome/browser/extensions/api/sessions/session_id.h

Index: chrome/browser/extensions/api/sessions/session_id.h
diff --git a/chrome/browser/extensions/api/sessions/session_id.h b/chrome/browser/extensions/api/sessions/session_id.h
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+++ b/chrome/browser/extensions/api/sessions/session_id.h
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+// Copyright (c) 2013 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_EXTENSIONS_API_SESSIONS_SESSION_ID_H__
+#define CHROME_BROWSER_EXTENSIONS_API_SESSIONS_SESSION_ID_H__
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace extensions {
+
+class SessionId {
+ public:
+  // Returns a SessionId, representing either a local or a foreign session.
+  // In the case that the session is local, |session_tag_| will be empty string.
+  // |session_string| should be in the format that ToString() would produce.
+  static scoped_ptr<SessionId> Parse(const std::string& session_string);
+
+  // Constructs a SessionId object for the given session information.
+  // |session_tag| is the string used to uniquely identify a synced foreign
+  // session from the SessionModelAssociator. In the case that SessionId
+  // represents a local session, |session_tag_| will be the empty string. |id|
+  // uniquely identifies either a window or tab object in the local or the
+  // |session_tag| session.
+  SessionId(const std::string& session_tag, int id);
+
+  // Returns true if the SessionId represents a foreign session.
+  bool IsForeign() const;
+
+  // Returns the compressed std::string representation of a SessionId in the
+  // same format that Parse() accepts as its |session_string| parameter.
+  std::string ToString() const;
+
+  const std::string& session_tag() const { return session_tag_; }
+  int id() const { return id_; }
+
+ private:
+  // The unique identifier for a foreign session, given by the
+  // SessionModelAssociator.
+  std::string session_tag_;
+
+  // ID corresponding to a window or tab object.
+  int id_;
+
+  DISALLOW_COPY_AND_ASSIGN(SessionId);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_SESSIONS_SESSION_ID_H__