mash: Move shelf model and item classes to ash/common/shelf

ash/shelf/shelf_item_delegate.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_ITEM_DELEGATE_H_
-#define ASH_SHELF_SHELF_ITEM_DELEGATE_H_
-
-#include "ash/ash_export.h"
-#include "base/strings/string16.h"
-
-namespace ui {
-class Event;
-class MenuModel;
-}
-
-namespace ash {
-
-class ShelfMenuModel;
-
-// Delegate for the ShelfItem.
-class ASH_EXPORT ShelfItemDelegate {
- public:
-  // The return type for the ShelfItemDelegate::ItemSelected method.
-  enum PerformedAction {
-    // No action was taken.
-    kNoAction,
-    // A new window was created.
-    kNewWindowCreated,
-    // An existing window which was not currently active was activated.
-    kExistingWindowActivated,
-    // The currently active window was minimized.
-    kExistingWindowMinimized,
-    // The app list launcher menu was shown.
-    kAppListMenuShown,
-  };
-
-  virtual ~ShelfItemDelegate() {}
-
-  // Invoked when the user clicks on a window entry in the launcher.
-  // |event| is the click event. The |event| is dispatched by a view
-  // and has an instance of |views::View| as the event target
-  // but not |aura::Window|. If the |event| is of type KeyEvent, it is assumed
-  // that this was triggered by keyboard action (Alt+<number>) and special
-  // handling might happen.
-  // Returns the action performed by selecting the item.
-  virtual PerformedAction ItemSelected(const ui::Event& event) = 0;
-
-  // Returns the title to display.
-  virtual base::string16 GetTitle() = 0;
-
-  // Returns whether the user can change the pin status of this item.
-  // Pinning may be disallowed by policy if this app is pinned by pre-defined
-  // pinned app list.
-  virtual bool CanPin() const = 0;
-
-  // Returns the application menu model for the specified item. There are three
-  // possible return values:
-  //  - A return of NULL indicates that no menu is wanted for this item.
-  //  - A return of a menu with one item means that only the name of the
-  //    application/item was added and there are no active applications.
-  //    Note: This is useful for hover menus which also show context help.
-  //  - A list containing the title and the active list of items.
-  // The caller takes ownership of the returned model.
-  // |event_flags| specifies the flags of the event which triggered this menu.
-  virtual ShelfMenuModel* CreateApplicationMenu(int event_flags) = 0;
-
-  // Whether the launcher item is draggable.
-  virtual bool IsDraggable() = 0;
-
-  // Returns true if a tooltip should be shown.
-  virtual bool ShouldShowTooltip() = 0;
-
-  // Closes all windows associated with this item.
-  virtual void Close() = 0;
-
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_SHELF_ITEM_DELEGATE_H_