122 lines
3.9 KiB
C++
122 lines
3.9 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2015 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_FEATURE_GRAMMAR_HPP
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#define MAPNIK_FEATURE_GRAMMAR_HPP
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// mapnik
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#include <mapnik/json/geometry_grammar.hpp>
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#include <mapnik/value.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/value.hpp>
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#include <mapnik/json/generic_json.hpp>
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#include <mapnik/json/value_converters.hpp>
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-conversion"
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#include <boost/spirit/include/qi.hpp>
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#include <boost/spirit/include/phoenix.hpp>
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#include <boost/spirit/include/support_line_pos_iterator.hpp>
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#pragma GCC diagnostic pop
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namespace mapnik { namespace json {
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namespace qi = boost::spirit::qi;
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namespace phoenix = boost::phoenix;
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namespace fusion = boost::fusion;
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class attribute_value_visitor
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{
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public:
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attribute_value_visitor(mapnik::transcoder const& tr)
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: tr_(tr) {}
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mapnik::value operator()(std::string const& val) const
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{
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return mapnik::value(tr_.transcode(val.c_str()));
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}
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template <typename T>
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mapnik::value operator()(T const& val) const
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{
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return mapnik::value(val);
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}
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mapnik::transcoder const& tr_;
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};
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struct put_property
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{
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using result_type = void;
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explicit put_property(mapnik::transcoder const& tr)
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: tr_(tr) {}
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template <typename T0,typename T1, typename T2>
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result_type operator() (T0 & feature, T1 const& key, T2 && val) const
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{
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feature.put_new(key, mapnik::util::apply_visitor(attribute_value_visitor(tr_),val));
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}
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mapnik::transcoder const& tr_;
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};
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struct set_geometry_impl
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{
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using result_type = void;
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template <typename T0, typename T1>
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result_type operator() (T0 & feature, T1 && geom) const
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{
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return feature.set_geometry(std::move(geom));
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}
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};
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template <typename Iterator, typename FeatureType, typename ErrorHandler = error_handler<Iterator> >
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struct feature_grammar :
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qi::grammar<Iterator, void(FeatureType&),
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space_type>
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{
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feature_grammar(mapnik::transcoder const& tr);
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// start
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// generic JSON
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generic_json<Iterator> json_;
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// geoJSON
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qi::rule<Iterator,void(FeatureType&),space_type> feature; // START
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qi::rule<Iterator,space_type> feature_type;
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qi::rule<Iterator,void(FeatureType &),space_type> properties;
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qi::rule<Iterator,qi::locals<std::string>, void(FeatureType &),space_type> attributes;
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qi::rule<Iterator, json_value(), space_type> attribute_value;
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qi::rule<Iterator, qi::locals<std::int32_t>, std::string(), space_type> stringify_object;
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qi::rule<Iterator, qi::locals<std::int32_t>, std::string(), space_type> stringify_array;
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// functions
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phoenix::function<put_property> put_property_;
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phoenix::function<set_geometry_impl> set_geometry;
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// error handler
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boost::phoenix::function<ErrorHandler> const error_handler;
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// geometry
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geometry_grammar<Iterator> geometry_grammar_;
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};
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}}
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#endif // MAPNIK_FEATURE_GRAMMAR_HPP
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