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// Copyright 2014 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 ATHENA_WM_PUBLIC_WINDOW_LIST_PROVIDER_H_
#define ATHENA_WM_PUBLIC_WINDOW_LIST_PROVIDER_H_
#include "athena/athena_export.h"
#include "ui/aura/window.h"
namespace athena {
class WindowListProviderObserver;
// Interface for an ordered list of aura::Window objects.
// Note that lists returned by GetCurrentWindowList() will not change if any of
// the other member functions will be called later.
class ATHENA_EXPORT WindowListProvider {
public:
virtual ~WindowListProvider() {}
// Adding/removing an observer to status changes.
virtual void AddObserver(WindowListProviderObserver* observer) = 0;
virtual void RemoveObserver(WindowListProviderObserver* observer) = 0;
// Returns an ordered list of the current window configuration.
virtual const aura::Window::Windows& GetWindowList() const = 0;
// Returns true if the |window| is part of the list.
virtual bool IsWindowInList(aura::Window* window) const = 0;
// Stacks a given |window| in direct front of a |reference_window|.
// Note: The |window| and |reference_window| has to be in the list already.
virtual void StackWindowFrontOf(aura::Window* window,
aura::Window* reference_window) = 0;
// Stacks a given |window| directly behind a |reference_window|.
// Note: The |window| and |reference_window| has to be in the list already.
virtual void StackWindowBehindTo(aura::Window* window,
aura::Window* reference_window) = 0;
};
} // namespace athena
#endif // ATHENA_WM_PUBLIC_WINDOW_LIST_PROVIDER_H_
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