/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#pragma once

#include <svx/IAccessibleViewForwarder.hxx>

class SdrPaintView;
class OutputDevice;

namespace accessibility
{
/** <p>This class provides the means to transform between internal coordinates
    and screen coordinates without giving direct access to the underlying
    view.  It represents a certain window.  A call to
    <method>GetVisArea</method> returns the corresponding visible
    rectangle.</p>

    @attention
        Note, that modifications of the underlying view that lead to
        different transformations between internal and screen coordinates or
        change the validity of the forwarder have to be signaled separately.
*/
class AccessibleViewForwarder final : public IAccessibleViewForwarder
{
public:
    //=====  internal  ========================================================

    AccessibleViewForwarder(SdrPaintView* pView, const OutputDevice& rDevice);

    virtual ~AccessibleViewForwarder() override;

    //=====  IAccessibleViewforwarder  ========================================

    /** Returns the area of the underlying document that is visible in the
    * corresponding window.

        @return
            The rectangle of the visible part of the document.
     */
    virtual ::tools::Rectangle GetVisibleArea() const override;

    /** Transform the specified point from internal coordinates to an
        absolute screen position.

        @param rPoint
            Point in internal coordinates.

        @return
            The same point but in screen coordinates relative to the upper
            left corner of the (current) screen.
     */
    virtual Point LogicToPixel(const Point& rPoint) const override;

    /** Transform the specified size from internal coordinates to a screen
    * position.

        @param rSize
            Size in internal coordinates.

        @return
            The same size but in screen coordinates.
     */
    virtual Size LogicToPixel(const Size& rSize) const override;

private:
    SdrPaintView* mpView;
    sal_uInt16 mnWindowId;

    AccessibleViewForwarder(AccessibleViewForwarder const&) = delete;
    AccessibleViewForwarder& operator=(AccessibleViewForwarder const&) = delete;
};

} // end of namespace accessibility

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