mash: Move ShelfModel* to ash/public/cpp.

ash/shelf/shelf_model.h

-// Copyright 2013 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 ASH_SHELF_SHELF_MODEL_H_
-#define ASH_SHELF_SHELF_MODEL_H_
-
-#include <map>
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/public/cpp/shelf_item.h"
-#include "ash/public/interfaces/shelf.mojom.h"
-#include "base/macros.h"
-#include "base/observer_list.h"
-
-namespace ash {
-
-class ShelfItemDelegate;
-class ShelfModelObserver;
-
-// An id for the AppList item, which is added in the ShelfModel constructor.
-// Generated as crx_file::id_util::GenerateId("org.chromium.applist")
-ASH_EXPORT extern const char kAppListId[];
-
-// Model used for shelf items. Owns ShelfItemDelegates but does not create them.
-// TODO(msw): Move this to ash/public/cpp and use ASH_PUBLIC_EXPORT.
-class ASH_EXPORT ShelfModel {
- public:
-  ShelfModel();
-  ~ShelfModel();
-
-  // Pins an app with |app_id| to shelf. A running instance will get pinned.
-  // If there is no running instance, a new shelf item is created and pinned.
-  void PinAppWithID(const std::string& app_id);
-
-  // Check if the app with |app_id_| is pinned to the shelf.
-  bool IsAppPinned(const std::string& app_id);
-
-  // Unpins app item with |app_id|.
-  void UnpinAppWithID(const std::string& app_id);
-
-  // Cleans up the ShelfItemDelegates.
-  void DestroyItemDelegates();
-
-  // Adds a new item to the model. Returns the resulting index.
-  int Add(const ShelfItem& item);
-
-  // Adds the item. |index| is the requested insertion index, which may be
-  // modified to meet type-based ordering. Returns the actual insertion index.
-  int AddAt(int index, const ShelfItem& item);
-
-  // Removes the item at |index|.
-  void RemoveItemAt(int index);
-
-  // Moves the item at |index| to |target_index|. |target_index| is in terms
-  // of the model *after* the item at |index| is removed.
-  void Move(int index, int target_index);
-
-  // Resets the item at the specified index. The item's id should not change.
-  void Set(int index, const ShelfItem& item);
-
-  // Returns the index of the item with id |shelf_id|, or -1 if none exists.
-  int ItemIndexByID(const ShelfID& shelf_id) const;
-
-  // Returns the |index| of the item matching |type| in |items_|.
-  // Returns -1 if the matching item is not found.
-  int GetItemIndexForType(ShelfItemType type);
-
-  // Returns the index of the first running application or the index where the
-  // first running application would go if there are no running (non pinned)
-  // applications yet.
-  int FirstRunningAppIndex() const;
-
-  // Returns the index of the first panel or the index where the first panel
-  // would go if there are no panels.
-  int FirstPanelIndex() const;
-
-  // Returns an iterator into items() for the item with the specified id, or
-  // items().end() if there is no item with the specified id.
-  ShelfItems::const_iterator ItemByID(const ShelfID& shelf_id) const;
-
-  const ShelfItems& items() const { return items_; }
-  int item_count() const { return static_cast<int>(items_.size()); }
-
-  // Sets |item_delegate| for the given |shelf_id| and takes ownership.
-  void SetShelfItemDelegate(const ShelfID& shelf_id,
-                            std::unique_ptr<ShelfItemDelegate> item_delegate);
-
-  // Returns ShelfItemDelegate for |shelf_id|, or nullptr if none exists.
-  ShelfItemDelegate* GetShelfItemDelegate(const ShelfID& shelf_id);
-
-  void AddObserver(ShelfModelObserver* observer);
-  void RemoveObserver(ShelfModelObserver* observer);
-
- private:
-  // Makes sure |index| is in line with the type-based order of items. If that
-  // is not the case, adjusts index by shifting it to the valid range and
-  // returns the new value.
-  int ValidateInsertionIndex(ShelfItemType type, int index) const;
-
-  ShelfItems items_;
-  base::ObserverList<ShelfModelObserver> observers_;
-
-  std::map<ShelfID, std::unique_ptr<ShelfItemDelegate>>
-      id_to_item_delegate_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShelfModel);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_SHELF_MODEL_H_