/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the Collabora Office 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 <ostream>

#include <basegfx/units/Length.hxx>
#include <sal/log.hxx>
#include <tools/gen.hxx>
#include "swdllapi.h"

class SvStream;
typedef struct _xmlTextWriter* xmlTextWriterPtr;

/// *Of course* Writer needs its own rectangles.
/// This is half-open so m_Point.X() + m_Size.Width() is *not* included.
/// Note the tools Rectangle is (usually? sometimes?) closed so there's a
/// SVRect() to subtract 1 for the conversion.
class SAL_WARN_UNUSED SwRect
{
    Point m_Point;
    Size m_Size;

public:
    SwRect() = default;
    SwRect(const SwRect& rRect) = default;
    inline SwRect( const Point& rLT, const Size&  rSize );
    inline SwRect( const Point& rLT, const Point& rRB );
    inline SwRect( tools::Long X, tools::Long Y, tools::Long Width, tools::Long Height );

    //SV-SS e.g. SwRect( pWin->GetClipRect() );
    explicit SwRect( const tools::Rectangle &rRect );

    //Set-Methods
    inline void Chg( const Point& rNP, const Size &rNS );
    void Pos(const Point& rNew) { m_Point = rNew; }
    void Pos(tools::Long nNewX, tools::Long nNewY) { Pos({ nNewX, nNewY }); }
    void SSize(const Size& rNew) { m_Size = rNew; }
    void SSize(tools::Long nHeight, tools::Long nWidth) { SSize({ nWidth, nHeight }); }
    void Width(tools::Long nNew) { m_Size.setWidth(nNew); }
    void Height(tools::Long nNew) { m_Size.setHeight(nNew); }
    inline void Left( const tools::Long nLeft );
    void Right(tools::Long nRight) { Width(nRight - Left() + 1); }
    inline void Top( const tools::Long nTop );
    void Bottom(tools::Long nBottom) { Height(nBottom - Top() + 1); }

    //Get-Methods
    const Point& Pos() const { return m_Point; }
    const Size& SSize() const { return m_Size; }
    tools::Long Width() const { return m_Size.Width(); }
    tools::Long Height() const { return m_Size.Height(); }
    tools::Long Left() const { return m_Point.X(); }
    tools::Long Right() const { return Width() ? Left() + Width() - 1 : Left(); }
    tools::Long Top() const { return m_Point.Y(); }
    tools::Long Bottom() const { return Height() ? Top() + Height() - 1 : Top(); }

    /// gfx::Length accessors (twip-based, for gradual migration to EMU)
    gfx::Length getWidth()  const { return gfx::Length::twip(Width()); }
    gfx::Length getHeight() const { return gfx::Length::twip(Height()); }
    gfx::Length getLeft()   const { return gfx::Length::twip(Left()); }
    gfx::Length getRight()  const { return gfx::Length::twip(Right()); }
    gfx::Length getTop()    const { return gfx::Length::twip(Top()); }
    gfx::Length getBottom() const { return gfx::Length::twip(Bottom()); }

    // In order to be able to access the members of Pos and SSize from the layout side.
    Point& Pos() { return m_Point; }

    Point Center() const { return Point(Left() + Width() / 2, Top() + Height() / 2); }

    void Justify();

    SwRect &Union( const SwRect& rRect );
    SwRect &Intersection( const SwRect& rRect );

    SwRect GetUnion( const SwRect& rRect ) const;
    SwRect GetIntersection( const SwRect& rRect ) const;

    // Same as Intersection, only assume that Rects are overlapping!
    SwRect &Intersection_( const SwRect &rRect );

    bool Contains( const Point& rPOINT ) const;
    bool Contains( const SwRect& rRect ) const;
    bool Overlaps( const SwRect& rRect ) const;
    bool IsNear(const Point& rPoint, tools::Long nTolerance ) const;
    bool HasArea() const { return Height() && Width(); }
    bool IsEmpty() const { return !HasArea(); }
    void Clear() { Chg({}, {}); }

    SwRect &operator = ( const SwRect &rRect ) = default;

    bool operator==(const SwRect& rRect) const = default;

    inline SwRect &operator+=( const Point &rPt );
    inline SwRect &operator-=( const Point &rPt );

    //SV-SS e.g. pWin->DrawRect( aSwRect.SVRect() );
    inline tools::Rectangle  SVRect() const;

    // Output operator for debugging.
    friend SvStream& WriteSwRect( SvStream &rStream, const SwRect &rRect );
    void dumpAsXmlAttributes(xmlTextWriterPtr writer) const;

    void Top_(      const tools::Long nTop );
    void Bottom_(   const tools::Long nBottom );
    void Left_(     const tools::Long nLeft );
    void Right_(    const tools::Long nRight );
    void Width_(    const tools::Long nNew );
    void Height_(   const tools::Long nNew );
    tools::Long Top_()     const;
    tools::Long Bottom_()  const;
    tools::Long Left_()    const;
    tools::Long Right_()   const;
    tools::Long Width_()   const;
    tools::Long Height_()  const;
    void SubTop(    const tools::Long nSub );
    void AddTop(    const tools::Long nAdd );
    void AddBottom( const tools::Long nAdd );
    void AddLeft(   const tools::Long nAdd );
    void SubLeft(   const tools::Long nSub );
    void AddRight(  const tools::Long nAdd );
    void AddWidth(  const tools::Long nAdd );
    void AddHeight( const tools::Long nAdd );
    void SetPosX(   const tools::Long nNew );
    void SetPosY(   const tools::Long nNew );
    void SetLeftAndWidth( tools::Long nLeft, tools::Long nNew );
    void SetTopAndHeight( tools::Long nTop, tools::Long nNew );
    void SetRightAndWidth( tools::Long nRight, tools::Long nNew );
    void SetBottomAndHeight( tools::Long nBottom, tools::Long nNew );
    void SetUpperLeftCorner(  const Point& rNew );
    void SetUpperRightCorner(  const Point& rNew );
    void SetLowerLeftCorner(  const Point& rNew );
    Size  Size_() const;
    Point TopLeft() const { return Point(Left(), Top()); }
    Point TopRight() const { return Point(Right(), Top()); }
    Point BottomLeft() const { return Point(Left(), Bottom()); }
    Point BottomRight() const { return Point(Right(), Bottom()); }
    Size  SwappedSize() const;
    tools::Long GetLeftDistance( tools::Long ) const;
    tools::Long GetBottomDistance( tools::Long ) const;
    tools::Long GetRightDistance( tools::Long ) const;
    tools::Long GetTopDistance( tools::Long ) const;
    bool OverStepLeft( tools::Long ) const;
    bool OverStepBottom( tools::Long ) const;
    bool OverStepTop( tools::Long ) const;
    bool OverStepRight( tools::Long ) const;
};

typedef void (SwRect::*SwRectSet)( const tools::Long nNew );
typedef tools::Long (SwRect::*SwRectGet)() const;
typedef Point (SwRect::*SwRectPoint)() const;
typedef Size (SwRect::*SwRectSize)() const;
typedef bool (SwRect::*SwRectMax)( tools::Long ) const;
typedef tools::Long (SwRect::*SwRectDist)( tools::Long ) const;
typedef void (SwRect::*SwRectSetTwice)( tools::Long, tools::Long );
typedef void (SwRect::*SwRectSetPos)( const Point& );

//  Set-Methods
inline void SwRect::Chg( const Point& rNP, const Size &rNS )
{
    m_Point = rNP;
    m_Size = rNS;
}
inline void SwRect::Left( const tools::Long nLeft )
{
    m_Size.AdjustWidth( Left() - nLeft );
    m_Point.setX(nLeft);
}
inline void SwRect::Top( const tools::Long nTop )
{
    m_Size.AdjustHeight( Top() - nTop );
    m_Point.setY(nTop);
}

inline SwRect &SwRect::operator+=( const Point &rPt )
{
    m_Point += rPt;
    return *this;
}
inline SwRect &SwRect::operator-=( const Point &rPt )
{
    m_Point -= rPt;
    return *this;
}

// other
inline tools::Rectangle SwRect::SVRect() const
{
    SAL_INFO_IF( IsEmpty(), "sw.core", "SVRect() without Width or Height" );
    return tools::Rectangle( Left(), Top(),
        Left() + Width() - 1,         //Right()
        Top() + Height() - 1 );      //Bottom()
}

// constructors
inline SwRect::SwRect( const Point& rLT, const Size&  rSize ) :
    m_Point( rLT ),
    m_Size( rSize )
{
}
inline SwRect::SwRect( const Point& rLT, const Point& rRB ) :
    m_Point( rLT ),
    m_Size( rRB.X() - rLT.X() + 1, rRB.Y() - rLT.Y() + 1 )
{
}
inline SwRect::SwRect( tools::Long X, tools::Long Y, tools::Long W, tools::Long H ) :
    m_Point( X, Y ),
    m_Size( W, H )
{
}

inline bool SwRect::Contains( const SwRect& rRect ) const
{
    const tools::Long nRight  = Right();
    const tools::Long nBottom = Bottom();
    const tools::Long nrRight = rRect.Right();
    const tools::Long nrBottom= rRect.Bottom();
    return (Left() <= rRect.Left()) && (rRect.Left()<= nRight)  &&
           (Left() <= nrRight)      && (nrRight     <= nRight)  &&
           (Top()  <= rRect.Top())  && (rRect.Top() <= nBottom) &&
           (Top()  <= nrBottom)     && (nrBottom    <= nBottom);
}

inline bool SwRect::Contains( const Point& rPoint ) const
{
    return (Left()  <= rPoint.X()) &&
           (Top()   <= rPoint.Y()) &&
           (Right() >= rPoint.X()) &&
           (Bottom()>= rPoint.Y());
}

// mouse moving of table borders
inline bool SwRect::IsNear( const Point& rPoint, tools::Long nTolerance ) const
{
    bool bIsNearby = (((Left()   - nTolerance) <= rPoint.X()) &&
                      ((Top()    - nTolerance) <= rPoint.Y()) &&
                      ((Right()  + nTolerance) >= rPoint.X()) &&
                      ((Bottom() + nTolerance) >= rPoint.Y()));
    return Contains(rPoint) || bIsNearby;
}

inline bool SwRect::Overlaps( const SwRect& rRect ) const
{
    return (Top()   <= rRect.Bottom()) &&
           (Left()  <= rRect.Right())  &&
           (Right() >= rRect.Left())   &&
           (Bottom()>= rRect.Top());
}

inline SwRect SwRect::GetUnion( const SwRect& rRect ) const
{
    return IsEmpty() ? rRect : rRect.IsEmpty() ? *this : SwRect(
        Point( std::min( Left(), rRect.Left()),
               std::min( Top(), rRect.Top())),
        Point( std::max( Right(), rRect.Right()),
               std::max( Bottom(), rRect.Bottom())));
}

inline SwRect SwRect::GetIntersection( const SwRect& rRect ) const
{
    return Overlaps( rRect )
        ? SwRect(
            Point( std::max( Left(), rRect.Left()),
                   std::max( Top(), rRect.Top())),
            Point( std::min( Right(), rRect.Right()),
                   std::min( Bottom(), rRect.Bottom())))
        : SwRect();
}


template< typename charT, typename traits >
inline std::basic_ostream<charT, traits> & operator <<(
    std::basic_ostream<charT, traits> & stream, const SwRect& rectangle )
{
    if (rectangle.IsEmpty())
        stream << "EMPTY:";
    return stream << rectangle.SSize()
                  << "@(" << rectangle.Pos() << ")";
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */