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// Copyright (c) 2012 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_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_
#define CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_
#pragma once
#include <set>
#include "chrome/browser/bookmarks/base_bookmark_model_observer.h"
class BookmarkNode;
class Profile;
// BookmarkExpandedStateTracker is used to track a set of expanded nodes. The
// nodes are persisted in preferences. If an expanded node is removed from the
// model BookmarkExpandedStateTracker removes the node.
class BookmarkExpandedStateTracker : public BaseBookmarkModelObserver {
public:
typedef std::set<const BookmarkNode*> Nodes;
BookmarkExpandedStateTracker(Profile* profile,
const char* path,
BookmarkModel* bookmark_model);
virtual ~BookmarkExpandedStateTracker();
// The set of expanded nodes.
void SetExpandedNodes(const Nodes& nodes);
Nodes GetExpandedNodes();
// BookmarkModelObserver:
virtual void Loaded(BookmarkModel* model, bool ids_reassigned) OVERRIDE;
virtual void BookmarkModelChanged() OVERRIDE;
virtual void BookmarkModelBeingDeleted(BookmarkModel* model) OVERRIDE;
virtual void BookmarkNodeRemoved(BookmarkModel* model,
const BookmarkNode* parent,
int old_index,
const BookmarkNode* node) OVERRIDE;
private:
// Resets the value in preferences from |expanded_nodes_|.
void UpdatePrefs(const Nodes& nodes);
Profile* profile_;
// Preferences path expanded state is stored under.
const char* pref_path_;
DISALLOW_COPY_AND_ASSIGN(BookmarkExpandedStateTracker);
};
#endif // CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_
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