| // 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 ASH_LAUNCHER_LAUNCHER_MODEL_H_ |
| #define ASH_LAUNCHER_LAUNCHER_MODEL_H_ |
| |
| #include "ash/ash_export.h" |
| #include "ash/launcher/launcher_types.h" |
| #include "base/basictypes.h" |
| #include "base/observer_list.h" |
| |
| namespace ash { |
| |
| class LauncherModelObserver; |
| |
| // Model used by LauncherView. |
| class ASH_EXPORT LauncherModel { |
| public: |
| enum Status { |
| STATUS_NORMAL, |
| // A status that indicates apps are syncing/loading. |
| STATUS_LOADING, |
| }; |
| |
| LauncherModel(); |
| ~LauncherModel(); |
| |
| // Adds a new item to the model. Returns the resulting index. |
| int Add(const LauncherItem& 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 LauncherItem& 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 maintains its existing |
| // id and type. |
| void Set(int index, const LauncherItem& item); |
| |
| // Returns the index of the item by id. |
| int ItemIndexByID(LauncherID id) 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 the id assigned to the next item added. |
| LauncherID next_id() const { return next_id_; } |
| |
| // Returns a reserved id which will not be used by the |LauncherModel|. |
| LauncherID reserve_external_id() { return next_id_++; } |
| |
| // Returns an iterator into items() for the item with the specified id, or |
| // items().end() if there is no item with the specified id. |
| LauncherItems::const_iterator ItemByID(LauncherID id) const; |
| |
| const LauncherItems& items() const { return items_; } |
| int item_count() const { return static_cast<int>(items_.size()); } |
| |
| void SetStatus(Status status); |
| Status status() const { return status_; } |
| |
| void AddObserver(LauncherModelObserver* observer); |
| void RemoveObserver(LauncherModelObserver* 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(LauncherItemType type, int index) const; |
| |
| // ID assigned to the next item. |
| LauncherID next_id_; |
| |
| LauncherItems items_; |
| Status status_; |
| ObserverList<LauncherModelObserver> observers_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LauncherModel); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_LAUNCHER_LAUNCHER_MODEL_H_ |