text: // Copyright 2019 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_PUBLIC_CPP_DESKS_HELPER_H_
  #define ASH_PUBLIC_CPP_DESKS_HELPER_H_
  
  #include <string>
  
  #include "ash/public/cpp/ash_public_export.h"
  #include "base/macros.h"
  
  namespace aura {
  class Window;
  }  // namespace aura
  
  namespace ash {
  
  // Interface for an ash client (e.g. Chrome) to interact with the Virtual Desks
  // feature.
  class ASH_PUBLIC_EXPORT DesksHelper {
   public:
    static DesksHelper* Get();
  
    // Returns true if |window| exists on the currently active desk.
    virtual bool BelongsToActiveDesk(aura::Window* window) = 0;
  
    // Returns the active desk's index.
    virtual int GetActiveDeskIndex() const = 0;
  
    // Returns the names of the desk at |index|. If |index| is out-of-bounds,
    // return empty string.
    virtual std::u16string GetDeskName(int index) const = 0;
  
    // Returns the number of desks.
    virtual int GetNumberOfDesks() const = 0;
  
    // Sends |window| to desk at |desk_index|. Does nothing if the desk at
    // |desk_index| is the active desk. |desk_index| must be valid.
    virtual void SendToDeskAtIndex(aura::Window* window, int desk_index) = 0;
  
   protected:
    DesksHelper();
    virtual ~DesksHelper();
  
   private:
    DISALLOW_COPY_AND_ASSIGN(DesksHelper);
  };
  
  }  // namespace ash
  
  #endif  // ASH_PUBLIC_CPP_DESKS_HELPER_H_
  