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| 1 // Copyright 2015 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 COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_CLIENT_H_ |
| 6 #define COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_CLIENT_H_ |
| 7 |
| 8 #include "base/callback.h" |
| 9 #include "base/memory/scoped_vector.h" |
| 10 #include "components/sessions/session_id.h" |
| 11 |
| 12 namespace base { |
| 13 class CancelableTaskTracker; |
| 14 } |
| 15 |
| 16 namespace sessions { |
| 17 struct SessionWindow; |
| 18 } |
| 19 |
| 20 namespace sessions { |
| 21 |
| 22 struct SessionWindow; |
| 23 |
| 24 // Callback from TabRestoreServiceClient::GetLastSession. |
| 25 // The second parameter is the id of the window that was last active. |
| 26 typedef base::Callback<void(ScopedVector<SessionWindow>, SessionID::id_type)> |
| 27 GetLastSessionCallback; |
| 28 |
| 29 // A client interface that needs to be supplied to the tab restore service by |
| 30 // the embedder. |
| 31 class TabRestoreServiceClient { |
| 32 public: |
| 33 virtual ~TabRestoreServiceClient() {} |
| 34 |
| 35 // Returns whether there is a previous session to load. |
| 36 virtual bool HasLastSession() = 0; |
| 37 |
| 38 // Fetches the contents of the last session, notifying the callback when |
| 39 // done. If the callback is supplied an empty vector of SessionWindows |
| 40 // it means the session could not be restored. |
| 41 virtual void GetLastSession(const GetLastSessionCallback& callback, |
| 42 base::CancelableTaskTracker* tracker) = 0; |
| 43 }; |
| 44 |
| 45 } // namespace sessions |
| 46 |
| 47 #endif // COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_CLIENT_H_ |
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