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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/.
*/
#include "units.hxx"
#include <basegfx/range/b2drange.hxx>
#include "gfxtypes.hxx"
#include <rtl/ustring.hxx>
#include <osl/diagnose.h>
#include <boost/spirit/include/classic.hpp>
namespace svgi
{
double convLength( const OUString& value, SvgUnit unit, const State& rState, char dir )
{
// convert svg unit to internal coordinates ("pixel"). Since the
// OOo drawing layer is still largely integer-based, the initial
// viewport transformation includes a certain scale factor
double fRet(value.toDouble());
switch ( unit )
{
case SVG_LENGTH_UNIT_CM: fRet *= F_SVG_PIXEL_PER_INCH/2.54; break;
case SVG_LENGTH_UNIT_IN: fRet *= F_SVG_PIXEL_PER_INCH; break;
case SVG_LENGTH_UNIT_MM: fRet *= F_SVG_PIXEL_PER_INCH/25.4; break;
case SVG_LENGTH_UNIT_PC: fRet *= F_SVG_PIXEL_PER_INCH/6.0; break;
case SVG_LENGTH_UNIT_PT: fRet *= F_SVG_PIXEL_PER_INCH/72.0; break;
case SVG_LENGTH_UNIT_EM: fRet *= rState.mnFontSize; break;
case SVG_LENGTH_UNIT_EX: fRet *= rState.mnFontSize / 2.0; break;
case SVG_LENGTH_UNIT_USER:
case SVG_LENGTH_UNIT_PX:
// no unit defaults to PX in svg, assume display to have 90DPI
break;
case SVG_LENGTH_FONT_SIZE:
{
//In CSS2, the suggested scaling factor between adjacent indexes is 1.2
if ( value == "xx-small" )
fRet = rState.mnFontSize / 1.728;
else if ( value == "x-small" )
fRet = rState.mnFontSize / 1.44;
else if ( value == "small" )
fRet = rState.mnFontSize / 1.2;
else if ( value == "smaller" )
fRet = rState.mnParentFontSize / 1.2;
else if ( value == "initial" || value == "medium" )
fRet = rState.mnFontSize;
else if ( value == "larger" )
fRet = rState.mnParentFontSize * 1.2;
else if ( value == "large" )
fRet = rState.mnFontSize * 1.2;
else if ( value == "x-large" )
fRet = rState.mnFontSize * 1.44;
else if ( value == "xx-large" )
fRet = rState.mnFontSize * 1.728;
break;
}
case SVG_LENGTH_UNIT_PERCENTAGE:
{
double fBoxLen;
if (rState.maViewBox.isEmpty())
{
basegfx::B2DRange aDefaultBox(0, 0,
convLength("210", SVG_LENGTH_UNIT_MM, rState, 'h'),
convLength("297", SVG_LENGTH_UNIT_MM, rState, 'v'));
fBoxLen = (dir=='h' ? aDefaultBox.getWidth() :
(dir=='v' ? aDefaultBox.getHeight() :
aDefaultBox.getRange().getLength()));
}
else
{
fBoxLen = (dir=='h' ? rState.maViewBox.getWidth() :
(dir=='v' ? rState.maViewBox.getHeight() :
rState.maViewBox.getRange().getLength()));
}
fRet *= fBoxLen/100.0;
}
break;
default: SAL_WARN("filter.svg", "Unknown length type" ); break;
}
return fRet;
}
double convLength( const OUString& sValue, const State& rState, char dir )
{
//FIXME: convert deprecated spirit::classic to use spirit::qi
using namespace ::boost::spirit::classic;
OString aUTF8 = OUStringToOString( sValue,
RTL_TEXTENCODING_UTF8 );
std::string sVal;
SvgUnit eUnit=SVG_LENGTH_UNIT_PX;
const bool bRes = parse(aUTF8.getStr(),
// Begin grammar
(
//parse font-size keywords (ie: xx-large, medium )
( +(alpha_p) >> !(str_p("-") >> +alpha_p) )[assign_a(sVal)]
>> str_p("")[assign_a(eUnit,SVG_LENGTH_FONT_SIZE)] |
//take the first part and ignore the units
( +(anychar_p -
(str_p("cm") |
str_p("em") |
str_p("ex") |
str_p("in") |
str_p("mm") |
str_p("pc") |
str_p("pt") |
str_p("px") |
str_p("%")))
)[assign_a(sVal)]
>> ( str_p("cm") [assign_a(eUnit,SVG_LENGTH_UNIT_CM)]
| str_p("em") [assign_a(eUnit,SVG_LENGTH_UNIT_EM)]
| str_p("ex") [assign_a(eUnit,SVG_LENGTH_UNIT_EX)]
| str_p("in") [assign_a(eUnit,SVG_LENGTH_UNIT_IN)]
| str_p("mm") [assign_a(eUnit,SVG_LENGTH_UNIT_MM)]
| str_p("pc") [assign_a(eUnit,SVG_LENGTH_UNIT_PC)]
| str_p("pt") [assign_a(eUnit,SVG_LENGTH_UNIT_PT)]
| str_p("px") [assign_a(eUnit,SVG_LENGTH_UNIT_PX)]
| str_p("%") [assign_a(eUnit,SVG_LENGTH_UNIT_PERCENTAGE)]
| str_p("") [assign_a(eUnit,SVG_LENGTH_UNIT_USER)]
| end_p)
),
// End grammar
space_p).full;
if( !bRes )
return 0.0;
OUString oVal = OUString::createFromAscii(sVal.c_str()).replaceAll(",",".");
return convLength(oVal,eUnit,rState,dir);
}
} // namespace svgi
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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