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 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_ 6 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_ 7 8 #include <set> 9 10 #include "chrome/browser/bookmarks/base_bookmark_model_observer.h" 11 12 class BookmarkModel; 13 class BookmarkNode; 14 class PrefService; 15 16 // BookmarkExpandedStateTracker is used to track a set of expanded nodes. The 17 // nodes are persisted in preferences. If an expanded node is removed from the 18 // model BookmarkExpandedStateTracker removes the node. 19 class BookmarkExpandedStateTracker : public BaseBookmarkModelObserver { 20 public: 21 typedef std::set<const BookmarkNode*> Nodes; 22 23 BookmarkExpandedStateTracker(BookmarkModel* bookmark_model, 24 PrefService* pref_service); 25 virtual ~BookmarkExpandedStateTracker(); 26 27 // The set of expanded nodes. 28 void SetExpandedNodes(const Nodes& nodes); 29 Nodes GetExpandedNodes(); 30 31 private: 32 // BaseBookmarkModelObserver: 33 virtual void Loaded(BookmarkModel* model, bool ids_reassigned) OVERRIDE; 34 virtual void BookmarkModelChanged() OVERRIDE; 35 virtual void BookmarkModelBeingDeleted(BookmarkModel* model) OVERRIDE; 36 virtual void BookmarkNodeRemoved(BookmarkModel* model, 37 const BookmarkNode* parent, 38 int old_index, 39 const BookmarkNode* node) OVERRIDE; 40 virtual void BookmarkAllNodesRemoved(BookmarkModel* model) OVERRIDE; 41 42 // Updates the value for |prefs::kBookmarkEditorExpandedNodes| from 43 // GetExpandedNodes(). 44 void UpdatePrefs(const Nodes& nodes); 45 46 BookmarkModel* bookmark_model_; 47 PrefService* pref_service_; 48 49 DISALLOW_COPY_AND_ASSIGN(BookmarkExpandedStateTracker); 50 }; 51 52 #endif // CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_ 53