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// Copyright 2014 The Chromium Authors
// 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_
#include <set>
#include "base/memory/raw_ptr.h"
#include "components/bookmarks/browser/base_bookmark_model_observer.h"
#include "components/keyed_service/core/keyed_service.h"
class PrefService;
namespace bookmarks {
class BookmarkModel;
class BookmarkNode;
} // namespace bookmarks
// 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 bookmarks::BaseBookmarkModelObserver,
public KeyedService {
public:
typedef std::set<const bookmarks::BookmarkNode*> Nodes;
explicit BookmarkExpandedStateTracker(PrefService* pref_service);
BookmarkExpandedStateTracker(const BookmarkExpandedStateTracker&) = delete;
BookmarkExpandedStateTracker& operator=(const BookmarkExpandedStateTracker&) =
delete;
~BookmarkExpandedStateTracker() override;
// Should be invoked during the corresponding BookmarkModel creating - before
// that model is loaded.
void Init(bookmarks::BookmarkModel* bookmark_model);
// The set of expanded nodes.
void SetExpandedNodes(const Nodes& nodes);
Nodes GetExpandedNodes();
private:
// BaseBookmarkModelObserver:
void BookmarkModelLoaded(bool ids_reassigned) override;
void BookmarkModelChanged() override;
void BookmarkModelBeingDeleted() override;
void BookmarkNodeRemoved(const bookmarks::BookmarkNode* parent,
size_t old_index,
const bookmarks::BookmarkNode* node,
const std::set<GURL>& removed_urls,
const base::Location& location) override;
void BookmarkAllUserNodesRemoved(const std::set<GURL>& removed_urls,
const base::Location& location) override;
// Updates the value for |prefs::kBookmarkEditorExpandedNodes| from
// GetExpandedNodes().
void UpdatePrefs(const Nodes& nodes);
raw_ptr<bookmarks::BookmarkModel> bookmark_model_ = nullptr;
const raw_ptr<PrefService> pref_service_;
};
#endif // CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_
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