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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_SESSIONS_SESSION_RESTORE_H_ | 5 #ifndef CHROME_BROWSER_SESSIONS_SESSION_RESTORE_H_ |
6 #define CHROME_BROWSER_SESSIONS_SESSION_RESTORE_H_ | 6 #define CHROME_BROWSER_SESSIONS_SESSION_RESTORE_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
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33 // Indicates that if there is a problem restoring the last session then a | 33 // Indicates that if there is a problem restoring the last session then a |
34 // new tabbed browser should be created. | 34 // new tabbed browser should be created. |
35 ALWAYS_CREATE_TABBED_BROWSER = 1 << 1, | 35 ALWAYS_CREATE_TABBED_BROWSER = 1 << 1, |
36 | 36 |
37 // Restore blocks until complete. This is intended for use during startup | 37 // Restore blocks until complete. This is intended for use during startup |
38 // when we want to block until restore is complete. | 38 // when we want to block until restore is complete. |
39 SYNCHRONOUS = 1 << 2, | 39 SYNCHRONOUS = 1 << 2, |
40 }; | 40 }; |
41 | 41 |
42 // Notification callback list. | 42 // Notification callback list. |
43 using CallbackList = base::CallbackList<void(void)>; | 43 using CallbackList = base::CallbackList<void(int)>; |
44 | 44 |
45 // Used by objects calling RegisterOnSessionRestoredCallback() to de-register | 45 // Used by objects calling RegisterOnSessionRestoredCallback() to de-register |
46 // themselves when they are destroyed. | 46 // themselves when they are destroyed. |
47 using CallbackSubscription = | 47 using CallbackSubscription = |
48 scoped_ptr<base::CallbackList<void(void)>::Subscription>; | 48 scoped_ptr<base::CallbackList<void(int)>::Subscription>; |
49 | 49 |
50 // Restores the last session. |behavior| is a bitmask of Behaviors, see it | 50 // Restores the last session. |behavior| is a bitmask of Behaviors, see it |
51 // for details. If |browser| is non-null the tabs for the first window are | 51 // for details. If |browser| is non-null the tabs for the first window are |
52 // added to it. Returns the last active browser. | 52 // added to it. Returns the last active browser. |
53 // Every additional browser created will be created on the desktop specified | 53 // Every additional browser created will be created on the desktop specified |
54 // by |host_desktop_type|, if |browser| is non-null it should have the same | 54 // by |host_desktop_type|, if |browser| is non-null it should have the same |
55 // desktop type. | 55 // desktop type. |
56 // | 56 // |
57 // If |urls_to_open| is non-empty, a tab is added for each of the URLs. | 57 // If |urls_to_open| is non-empty, a tab is added for each of the URLs. |
58 static Browser* RestoreSession(Profile* profile, | 58 static Browser* RestoreSession(Profile* profile, |
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85 const sessions::SessionTab& tab, | 85 const sessions::SessionTab& tab, |
86 WindowOpenDisposition disposition); | 86 WindowOpenDisposition disposition); |
87 | 87 |
88 // Returns true if we're in the process of restoring |profile|. | 88 // Returns true if we're in the process of restoring |profile|. |
89 static bool IsRestoring(const Profile* profile); | 89 static bool IsRestoring(const Profile* profile); |
90 | 90 |
91 // Returns true if synchronously restoring a session. | 91 // Returns true if synchronously restoring a session. |
92 static bool IsRestoringSynchronously(); | 92 static bool IsRestoringSynchronously(); |
93 | 93 |
94 // Register callbacks for session restore events. These callbacks are stored | 94 // Register callbacks for session restore events. These callbacks are stored |
95 // in on_session_restored_callbacks_. | 95 // in |on_session_restored_callbacks_|. |
| 96 // The callback is supplied an integer arg representing a tab count. The exact |
| 97 // meaning and timing depend upon the restore type: |
| 98 // - SessionRestore::SYNCHRONOUS: the parameter is the number of tabs that |
| 99 // were created. Additionally the callback is invoked immediately after the |
| 100 // tabs have been created. That is, the tabs are not necessarily loading. |
| 101 // - For all other restore types the parameter is the number of tabs that were |
| 102 // restored and is sent after all tabs have started loading. Additionally if a |
| 103 // request to restore tabs comes in while a previous request to restore tabs |
| 104 // has not yet completed (loading tabs is throttled), then the callback is |
| 105 // only notified once both sets of tabs have started loading and with the |
| 106 // total number of tabs for both restores. |
96 static CallbackSubscription RegisterOnSessionRestoredCallback( | 107 static CallbackSubscription RegisterOnSessionRestoredCallback( |
97 const base::Closure& callback); | 108 const base::Callback<void(int)>& callback); |
98 | 109 |
99 // The max number of non-selected tabs SessionRestore loads when restoring | 110 // The max number of non-selected tabs SessionRestore loads when restoring |
100 // a session. A value of 0 indicates all tabs are loaded at once. | 111 // a session. A value of 0 indicates all tabs are loaded at once. |
101 static size_t num_tabs_to_load_; | 112 static size_t num_tabs_to_load_; |
102 | 113 |
103 private: | 114 private: |
104 SessionRestore(); | 115 SessionRestore(); |
105 | 116 |
106 // Accessor for |*on_session_restored_callbacks_|. Creates a new object the | 117 // Accessor for |*on_session_restored_callbacks_|. Creates a new object the |
107 // first time so that it always returns a valid object. | 118 // first time so that it always returns a valid object. |
108 static CallbackList* on_session_restored_callbacks() { | 119 static CallbackList* on_session_restored_callbacks() { |
109 if (!on_session_restored_callbacks_) | 120 if (!on_session_restored_callbacks_) |
110 on_session_restored_callbacks_ = new CallbackList(); | 121 on_session_restored_callbacks_ = new CallbackList(); |
111 return on_session_restored_callbacks_; | 122 return on_session_restored_callbacks_; |
112 } | 123 } |
113 | 124 |
114 // Contains all registered callbacks for session restore notifications. | 125 // Contains all registered callbacks for session restore notifications. |
115 static CallbackList* on_session_restored_callbacks_; | 126 static CallbackList* on_session_restored_callbacks_; |
116 | 127 |
117 DISALLOW_COPY_AND_ASSIGN(SessionRestore); | 128 DISALLOW_COPY_AND_ASSIGN(SessionRestore); |
118 }; | 129 }; |
119 | 130 |
120 #endif // CHROME_BROWSER_SESSIONS_SESSION_RESTORE_H_ | 131 #endif // CHROME_BROWSER_SESSIONS_SESSION_RESTORE_H_ |
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