/* -*- 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 .

 */

#ifndef INCLUDED_SW_INC_SWREGION_HXX

#define INCLUDED_SW_INC_SWREGION_HXX

#include <vector>

#include "swrect.hxx"

typedef std::vector<SwRect> SwRects;

// A collection of rectangles within a given area (origin).

// One way to use is to initially set rStartRect, which will set the origin

// and the rectangles to rStartRect, and then use operator-= to punch holes.

// Other way to use is to use empty constructor, call ChangeOrigin() and

// then use operator+= to add rectangles, possibly followed by final

// LimitToOrigin() and Compress(). The second way should be faster than

// the first way followed by Invert().

class SwRegionRects : public SwRects

{

    SwRect m_aOrigin; // Origin area, limits the total area e.g. for Invert()

    SwRects* m_pSubtracted = nullptr;

    inline void InsertRect( const SwRect &rRect, const sal_uInt16 nPos, bool &rDel);

public:

    // Sets rStartRect as the first element and also the origin area.

    explicit SwRegionRects( const SwRect& rStartRect, sal_uInt16 nInit = 20 );

    // Empty constructor, does not set elements or origin area. You may

    // most likely want to call ChangeOrigin() afterwards.

    explicit SwRegionRects( sal_uInt16 nInit = 20 );

    // Append every rectangle punched from here on, for a caller that wants the pieces a

    // selection was built from and not only the region Invert() leaves. Invert() punches

    // into a region of its own, so its own work is not recorded.

    void RecordSubtracted(SwRects* pRects) { m_pSubtracted = pRects; }

    // For punching from aOrigin.

    void operator-=( const SwRect& rRect );

    void operator+=( const SwRect& rRect );

    // From holes to areas, from areas to holes, within the origin area.

    void Invert();

    // Ensures all rectangles are within the origin area.

    void LimitToOrigin();

    enum CompressType { CompressExact, CompressFuzzy };

    // Combine adjacent rectangles.

    void Compress( CompressType type );

    const SwRect &GetOrigin() const { return m_aOrigin; }

    void ChangeOrigin( const SwRect &rRect ) { m_aOrigin = rRect; }

};

#endif // INCLUDED_SW_INC_SWREGION_HXX

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