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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2012 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
// mapnik
#include <mapnik/transform_expression_grammar.hpp>
// boost
#include <boost/version.hpp>
// spirit
#include <boost/spirit/home/phoenix/object/construct.hpp>
namespace mapnik {
namespace qi = boost::spirit::qi;
template <typename Iterator>
transform_expression_grammar<Iterator>::transform_expression_grammar(expression_grammar<Iterator> const& g)
: transform_expression_grammar::base_type(start)
{
using boost::phoenix::construct;
using qi::_a; using qi::_1; using qi::_4;
using qi::_b; using qi::_2; using qi::_5;
using qi::_c; using qi::_3; using qi::_6;
using qi::_val;
using qi::char_;
using qi::double_;
using qi::lit;
using qi::no_case;
// [http://www.w3.org/TR/SVG/coords.html#TransformAttribute]
// The value of the ‘transform’ attribute is a <transform-list>, which
// is defined as a list of transform definitions, which are applied in
// the order provided. The individual transform definitions are
// separated by whitespace and/or a comma.
#if BOOST_VERSION > 104200
using qi::no_skip;
start = transform_ % no_skip[char_(", ")] ;
#else
using qi::lexeme;
start = transform_ % lexeme[char_(", ")] ;
#endif
transform_ = matrix | translate | scale | rotate | skewX | skewY ;
// matrix(<a> <b> <c> <d> <e> <f>)
matrix = no_case[lit("matrix")]
>> (lit('(')
>> ( atom >> sep_atom >> sep_atom >> sep_atom >> sep_atom
>> sep_atom >> lit(')')
| expr >> sep_expr >> sep_expr >> sep_expr >> sep_expr
>> sep_expr >> lit(')')
))
[ _val = construct<matrix_node>(_1,_2,_3,_4,_5,_6) ];
// translate(<tx> [<ty>])
translate = no_case[lit("translate")]
>> lit('(')
>> ( ( atom >> -sep_atom >> lit(')') )
[ _val = construct<translate_node>(_1,_2) ]
| ( expr >> -sep_expr >> lit(')') )
[ _val = construct<translate_node>(_1,_2) ]
);
// scale(<sx> [<sy>])
scale = no_case[lit("scale")]
>> lit('(')
>> ( ( atom >> -sep_atom >> lit(')') )
[ _val = construct<scale_node>(_1,_2) ]
| ( expr >> -sep_expr >> lit(')') )
[ _val = construct<scale_node>(_1,_2) ]
);
// rotate(<rotate-angle> [<cx> <cy>])
rotate = no_case[lit("rotate")]
>> lit('(')
>> ( ( atom >> -( sep_atom >> sep_atom ) >> lit(')') )
[ _val = construct<rotate_node>(_1,_2) ]
| ( expr >> -( sep_expr >> sep_expr ) >> lit(')') )
[ _val = construct<rotate_node>(_1,_2) ]
);
// skewX(<skew-angle>)
skewX = no_case[lit("skewX")]
>> lit('(')
>> expr [ _val = construct<skewX_node>(_1) ]
>> lit(')');
// skewY(<skew-angle>)
skewY = no_case[lit("skewY")]
>> lit('(')
>> expr [ _val = construct<skewY_node>(_1) ]
>> lit(')');
// number or attribute
atom = double_ [ _val = _1 ]
| attr [ _val = construct<mapnik::attribute>(_1) ];
// Individual arguments in lists consiting solely of numbers and/or
// attributes are separated by whitespace and/or a comma.
sep_atom = -lit(',') >> atom [ _val = _1 ];
// Individual arguments in lists containing one or more compound
// expressions are separated by a comma.
sep_expr = lit(',') >> expr [ _val = _1 ];
attr = g.attr.alias();
expr = g.expr.alias();
}
template struct mapnik::transform_expression_grammar<std::string::const_iterator>;
}
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