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/* -*- 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 _SVX_LRSPITEM_HXX
#define _SVX_LRSPITEM_HXX

#include <svl/poolitem.hxx>
#include <editeng/editengdllapi.h>

namespace rtl
{
    class OUString;
}

// class SvxLRSpaceItem --------------------------------------------------

/*  [Description]

    Left/Right margin and first line indent

    SvxLRSpaceItem offers two interfaces for views from the left margin and
    first line indent. The get methods return the member, with the layout also
    as expected: the left edge shifts to the negative first line indent to the
    left. The SetTxt/Gettxt methods assume that the left side represents the
    0 coordinate for the first line indent:

    UI         UI       LAYOUT   UI/TEXT      UI/TEXT    (Where?)
    SetTxtLeft SetTxtFirst GetLeft  GetTxtLeft  GetTxtFirst  (What?)
    500       -500        0        500         -500      (How much?)
    500         0        500       500           0
    500       +500       500       500         +500
    700       -500       200       700         -500
*/

#define LRSPACE_16_VERSION      ((sal_uInt16)0x0001)
#define LRSPACE_TXTLEFT_VERSION ((sal_uInt16)0x0002)
#define LRSPACE_AUTOFIRST_VERSION ((sal_uInt16)0x0003)
#define LRSPACE_NEGATIVE_VERSION ((sal_uInt16)0x0004)

class EDITENG_DLLPUBLIC SvxLRSpaceItem : public SfxPoolItem
{
    short   nFirstLineOfst;     // First-line indent _always_ relative to nTxtLeft
    long    nTxtLeft;           // We spend a sal_uInt16
    long    nLeftMargin;        // nLeft or the negative first-line indent
    long    nRightMargin;       // The unproblematic right edge

    sal_uInt16  nPropFirstLineOfst, nPropLeftMargin, nPropRightMargin;
    sal_Bool    bAutoFirst  : 1;    // Automatic calculation of the first line indent

    void   AdjustLeft();        // nLeftMargin and nTxtLeft are being adjusted.

public:
    TYPEINFO();

    SvxLRSpaceItem( const sal_uInt16 nId  );
    SvxLRSpaceItem( const long nLeft, const long nRight,
                    const long nTLeft /*= 0*/, const short nOfset /*= 0*/,
                    const sal_uInt16 nId  );
    inline SvxLRSpaceItem& operator=( const SvxLRSpaceItem &rCpy );

    // "pure virtual Methods" from SfxPoolItem
    virtual int              operator==( const SfxPoolItem& ) const;

    virtual bool            QueryValue( com::sun::star::uno::Any& rVal, sal_uInt8 nMemberId = 0 ) const;
    virtual bool            PutValue( const com::sun::star::uno::Any& rVal, sal_uInt8 nMemberId = 0 );

    virtual SfxItemPresentation GetPresentation( SfxItemPresentation ePres,
                                    SfxMapUnit eCoreMetric,
                                    SfxMapUnit ePresMetric,
                                    String &rText, const IntlWrapper * = 0 ) const;

    virtual SfxPoolItem*     Clone( SfxItemPool *pPool = 0 ) const;
    virtual SfxPoolItem*     Create(SvStream &, sal_uInt16) const;
    virtual SvStream&        Store(SvStream &, sal_uInt16 nItemVersion ) const;
    virtual sal_uInt16           GetVersion( sal_uInt16 nFileVersion ) const;
    virtual bool                 ScaleMetrics( long nMult, long nDiv );
    virtual bool                 HasMetrics() const;

    // Die "Layout-Schnittstelle":
    inline void   SetLeft ( const long nL, const sal_uInt16 nProp = 100 );
    inline void   SetRight( const long nR, const sal_uInt16 nProp = 100 );

    // Query/direct setting of the absolute values
    inline long GetLeft()  const { return nLeftMargin; }
    inline long GetRight() const { return nRightMargin;}
    inline void SetLeftValue( const long nL ) { nTxtLeft = nLeftMargin = nL; }
    inline void SetRightValue( const long nR ) { nRightMargin = nR; }
    inline sal_Bool IsAutoFirst()  const { return bAutoFirst; }
    inline void SetAutoFirst( const sal_Bool bNew ) { bAutoFirst = bNew; }

    // Query/Setting the percentage values
    inline void SetPropLeft( const sal_uInt16 nProp = 100 )
                    { nPropLeftMargin = nProp; }
    inline void SetPropRight( const sal_uInt16 nProp = 100 )
                    { nPropRightMargin = nProp;}
    inline sal_uInt16 GetPropLeft()  const { return nPropLeftMargin; }
    inline sal_uInt16 GetPropRight() const { return nPropRightMargin;}

    // The UI/text interface:
    inline void SetTxtLeft( const long nL, const sal_uInt16 nProp = 100 );
    inline long GetTxtLeft() const { return nTxtLeft; }

    inline void   SetTxtFirstLineOfst( const short nF, const sal_uInt16 nProp = 100 );
    inline short  GetTxtFirstLineOfst() const { return nFirstLineOfst; }
    inline void SetPropTxtFirstLineOfst( const sal_uInt16 nProp = 100 )
                    { nPropFirstLineOfst = nProp; }
    inline sal_uInt16 GetPropTxtFirstLineOfst() const
                    { return nPropFirstLineOfst; }
    inline void SetTxtFirstLineOfstValue( const short nValue )
                    { nFirstLineOfst = nValue; }
};

inline SvxLRSpaceItem &SvxLRSpaceItem::operator=( const SvxLRSpaceItem &rCpy )
{
    nFirstLineOfst = rCpy.nFirstLineOfst;
    nTxtLeft = rCpy.nTxtLeft;
    nLeftMargin = rCpy.nLeftMargin;
    nRightMargin = rCpy.nRightMargin;
    nPropFirstLineOfst = rCpy.nPropFirstLineOfst;
    nPropLeftMargin = rCpy.nPropLeftMargin;
    nPropRightMargin = rCpy.nPropRightMargin;
    bAutoFirst = rCpy.bAutoFirst;
    return *this;
}

inline void SvxLRSpaceItem::SetLeft( const long nL, const sal_uInt16 nProp )
{
    nLeftMargin = (nL * nProp) / 100;
    nTxtLeft = nLeftMargin;
    nPropLeftMargin = nProp;
}
inline void SvxLRSpaceItem::SetRight( const long nR, const sal_uInt16 nProp )
{
    nRightMargin = (nR * nProp) / 100;
    nPropRightMargin = nProp;
}
inline void SvxLRSpaceItem::SetTxtFirstLineOfst( const short nF,
                                                 const sal_uInt16 nProp )
{
    nFirstLineOfst = short((long(nF) * nProp ) / 100);
    nPropFirstLineOfst = nProp;
    AdjustLeft();
}

inline void SvxLRSpaceItem::SetTxtLeft( const long nL, const sal_uInt16 nProp )
{
    nTxtLeft = (nL * nProp) / 100;
    nPropLeftMargin = nProp;
    AdjustLeft();
}

#endif

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