sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

geojson generator : catch empty geomeries

Browse source
This commit is contained in:
artemp 2013-11-20 15:53:24 +00:00
parent 5eb406c7df
commit 6e4007b8c0
1 changed files with 18 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
include/mapnik/json/geometry_generator_grammar.hpp
View file

@ -79,6 +79,15 @@ struct get_first
}
};
struct get_size
{
typedef unsigned result_type;
result_type operator() (geometry_type const& geom) const
{
return geom.size();
}
};
struct multi_geometry_type
{
typedef std::tuple<unsigned,bool> result_type;
@ -197,6 +206,7 @@ struct geometry_generator_grammar :
: geometry_generator_grammar::base_type(coordinates)
{
using boost::spirit::karma::uint_;
using boost::spirit::bool_;
using boost::spirit::karma::_val;
using boost::spirit::karma::_1;
using boost::spirit::karma::lit;
@ -204,7 +214,10 @@ struct geometry_generator_grammar :
using boost::spirit::karma::_r1;
using boost::spirit::karma::eps;
coordinates = point | linestring | polygon
coordinates = empty | point | linestring | polygon
;
empty = &uint_(0)[_1 = _size(_val)] << lit("null")
;
point = &uint_(mapnik::geometry_type::types::Point)[_1 = _type(_val)]
@ -226,7 +239,7 @@ struct geometry_generator_grammar :
point_coord = &uint_
<< lit('[')
<< coord_type << lit(',') << coord_type
<< lit("]")
<< lit(']')
;
polygon_coord %= ( &uint_(mapnik::SEG_MOVETO) << eps[_r1 += 1]
@ -234,10 +247,7 @@ struct geometry_generator_grammar :
.else_[_1 = '[' ]]
|
&uint_(mapnik::SEG_LINETO)
<< lit(','))
<< lit('[') << coord_type
<< lit(',')
<< coord_type << lit(']')
<< lit(',')) << lit('[') << coord_type << lit(',') << coord_type << lit(']')
;
coords2 %= *polygon_coord(_a)
@ -249,10 +259,10 @@ struct geometry_generator_grammar :
}
// rules
karma::rule<OutputIterator, geometry_type const& ()> coordinates;
karma::rule<OutputIterator, geometry_type const& ()> empty;
karma::rule<OutputIterator, geometry_type const& ()> point;
karma::rule<OutputIterator, geometry_type const& ()> linestring;
karma::rule<OutputIterator, geometry_type const& ()> polygon;
karma::rule<OutputIterator, geometry_type const& ()> coords;
karma::rule<OutputIterator, karma::locals<unsigned>, geometry_type const& ()> coords2;
karma::rule<OutputIterator, geometry_type::value_type ()> point_coord;
@ -261,6 +271,7 @@ struct geometry_generator_grammar :
// phoenix functions
phoenix::function<get_type > _type;
phoenix::function<get_first> _first;
phoenix::function<get_size> _size;
//
karma::real_generator<double, json_coordinate_policy<double> > coord_type;