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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 UI_APP_LIST_APP_LIST_MODEL_H_
#define UI_APP_LIST_APP_LIST_MODEL_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "ui/app_list/app_list_export.h"
#include "ui/app_list/app_list_item_list.h"
#include "ui/app_list/app_list_item_list_observer.h"
#include "ui/base/models/list_model.h"
namespace app_list {
class AppListFolderItem;
class AppListItem;
class AppListItemList;
class AppListModelObserver;
class SearchBoxModel;
class SearchResult;
// Master model of app list that consists of three sub models: AppListItemList,
// SearchBoxModel and SearchResults. The AppListItemList sub model owns a list
// of AppListItems and is displayed in the grid view. SearchBoxModel is
// the model for SearchBoxView. SearchResults owns a list of SearchResult.
// NOTE: Currently this class observes |item_list_|. The View code may
// move entries in the item list directly (but can not add or remove them) and
// the model needs to notify its observers when this occurs.
class APP_LIST_EXPORT AppListModel : public AppListItemListObserver {
public:
enum Status {
STATUS_NORMAL,
STATUS_SYNCING, // Syncing apps or installing synced apps.
};
typedef ui::ListModel<SearchResult> SearchResults;
AppListModel();
virtual ~AppListModel();
void AddObserver(AppListModelObserver* observer);
void RemoveObserver(AppListModelObserver* observer);
void SetStatus(Status status);
// Finds the item matching |id|.
AppListItem* FindItem(const std::string& id);
// Find a folder item matching |id|.
AppListFolderItem* FindFolderItem(const std::string& id);
// Adds |item| to the model. The model takes ownership of |item|.
void AddItem(AppListItem* item);
// Adds |item| to an existing folder or creates a new folder. If |folder_id|
// is empty, calls AddItem() instead. The model takes ownership of |item|.
void AddItemToFolder(AppListItem* item, const std::string& folder_id);
// Merges two items. If the target item is a folder, the source item is added
// to that folder, otherwise a new folder is created in the same position as
// the target item. Returns the id of the target folder.
const std::string& MergeItems(const std::string& target_item_id,
const std::string& source_item_id);
// Move |item| to the folder matching |folder_id| or out of any current
// folder if |folder_id| is empty.
void MoveItemToFolder(AppListItem* item, const std::string& folder_id);
// Sets the position of |item| either in |item_list_| or the folder specified
// by |item|->folder_id().
void SetItemPosition(AppListItem* item,
const syncer::StringOrdinal& new_position);
// Deletes the item matching |id| from |item_list_| or from its folder.
void DeleteItem(const std::string& id);
AppListItemList* item_list() { return item_list_.get(); }
SearchBoxModel* search_box() { return search_box_.get(); }
SearchResults* results() { return results_.get(); }
Status status() const { return status_; }
private:
// AppListItemListObserver
virtual void OnListItemMoved(size_t from_index,
size_t to_index,
AppListItem* item) OVERRIDE;
// Returns the position of the last item in |item_list_| or an initial one.
syncer::StringOrdinal GetLastItemPosition();
// Returns an existing folder matching |folder_id| or creates a new folder.
AppListFolderItem* FindOrCreateFolderItem(const std::string& folder_id);
// Adds |item| to |item_list_| and notifies observers.
void AddItemToItemList(AppListItem* item);
// Adds |item| to |folder| and notifies observers.
void AddItemToFolderItem(AppListFolderItem* folder, AppListItem* item);
// Removes |item| from |folder|. If |folder| becomes empty, deletes |folder|
// from |item_list_|. Does NOT trigger observers, calling function must do so.
scoped_ptr<AppListItem> RemoveItemFromFolder(AppListFolderItem* folder,
AppListItem* item);
scoped_ptr<AppListItemList> item_list_;
scoped_ptr<SearchBoxModel> search_box_;
scoped_ptr<SearchResults> results_;
Status status_;
ObserverList<AppListModelObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(AppListModel);
};
} // namespace app_list
#endif // UI_APP_LIST_APP_LIST_MODEL_H_
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