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| 1 // Copyright (c) 2013 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_UI_BROWSER_ITERATOR_H_ | |
| 6 #define CHROME_BROWSER_UI_BROWSER_ITERATOR_H_ | |
| 7 | |
| 8 #include "base/macros.h" | |
| 9 #include "chrome/browser/ui/browser_list.h" | |
| 10 #include "chrome/browser/ui/host_desktop.h" | |
| 11 | |
| 12 class Browser; | |
| 13 | |
| 14 namespace chrome { | |
| 15 | |
| 16 // TODO(scottmg): Remove this file entirely. http://crbug.com/558054. | |
| 17 | |
| 18 // Iterates over all existing browsers (potentially across multiple desktops). | |
| 19 // Note: to iterate only over the browsers of a specific desktop, use the | |
| 20 // const_iterator of a given BrowserList instead. | |
| 21 // | |
| 22 // Example: | |
| 23 // for (BrowserIterator iterator; !iterator.done(); iterator.Next()) { | |
| 24 // Browser* cur = *iterator; | |
| 25 // -or- | |
| 26 // iterator->OperationOnBrowser(); | |
| 27 // ... | |
| 28 // } | |
| 29 class BrowserIterator { | |
| 30 public: | |
| 31 BrowserIterator(); | |
| 32 ~BrowserIterator(); | |
| 33 | |
| 34 // Returns true if this iterator is past the last Browser. | |
| 35 bool done() const { | |
| 36 // |iterator_| is never at the end of a list unless it is done (it | |
| 37 // immediately moves to the next browser list upon hitting the end of the | |
| 38 // current list unless there are no remaining empty browser lists). | |
| 39 return iterator_ == browser_list_->end(); | |
| 40 } | |
| 41 | |
| 42 // Returns the current Browser, valid as long as !done(). | |
| 43 Browser* operator->() const { return *iterator_; } | |
| 44 Browser* operator*() const { return *iterator_; } | |
| 45 | |
| 46 // Advances |iterator_| to the next browser. | |
| 47 void Next(); | |
| 48 | |
| 49 private: | |
| 50 // The BrowserList being iterated over. | |
| 51 BrowserList* browser_list_; | |
| 52 | |
| 53 // The underlying iterator over browsers in |browser_list_|. | |
| 54 BrowserList::const_iterator iterator_; | |
| 55 | |
| 56 DISALLOW_COPY_AND_ASSIGN(BrowserIterator); | |
| 57 }; | |
| 58 | |
| 59 } // namespace chrome | |
| 60 | |
| 61 #endif // CHROME_BROWSER_UI_BROWSER_ITERATOR_H_ | |
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