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// Copyright 2014 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 COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_EXPANDED_STATE_TRACKER_H_
#define COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_EXPANDED_STATE_TRACKER_H_
#include <set>
#include "base/macros.h"
#include "components/bookmarks/browser/base_bookmark_model_observer.h"
class PrefService;
namespace bookmarks {
class BookmarkModel;
class BookmarkNode;
// 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(BookmarkModel* bookmark_model,
PrefService* pref_service);
~BookmarkExpandedStateTracker() override;
// The set of expanded nodes.
void SetExpandedNodes(const Nodes& nodes);
Nodes GetExpandedNodes();
private:
// BaseBookmarkModelObserver:
void BookmarkModelLoaded(BookmarkModel* model, bool ids_reassigned) override;
void BookmarkModelChanged() override;
void BookmarkModelBeingDeleted(BookmarkModel* model) override;
void BookmarkNodeRemoved(BookmarkModel* model,
const BookmarkNode* parent,
size_t old_index,
const BookmarkNode* node,
const std::set<GURL>& removed_urls) override;
void BookmarkAllUserNodesRemoved(BookmarkModel* model,
const std::set<GURL>& removed_urls) override;
// Updates the value for |prefs::kBookmarkEditorExpandedNodes| from
// GetExpandedNodes().
void UpdatePrefs(const Nodes& nodes);
BookmarkModel* bookmark_model_;
PrefService* pref_service_;
DISALLOW_COPY_AND_ASSIGN(BookmarkExpandedStateTracker);
};
} // namespace bookmarks
#endif // COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_EXPANDED_STATE_TRACKER_H_