add feature_grammar_x3 implementation
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48
include/mapnik/json/feature_grammar_x3.hpp
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48
include/mapnik/json/feature_grammar_x3.hpp
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/*****************************************************************************
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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) 2016 Artem Pavlenko
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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_JSON_FEATURE_GRAMMAR_X3_HPP
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#define MAPNIK_JSON_FEATURE_GRAMMAR_X3_HPP
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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#include <boost/spirit/home/x3.hpp>
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#pragma GCC diagnostic pop
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namespace mapnik { namespace json { namespace grammar {
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namespace x3 = boost::spirit::x3;
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using feature_grammar_type = x3::rule<class feature_rule_tag>;
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using geometry_grammar_type = x3::rule<class geometry_rule_tag>;
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BOOST_SPIRIT_DECLARE(feature_grammar_type);
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BOOST_SPIRIT_DECLARE(geometry_grammar_type);
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}
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grammar::feature_grammar_type const& feature_grammar();
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grammar::geometry_grammar_type const& geometry_grammar();
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}}
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#endif // MAPNIK_JSON_FEATURE_GRAMMAR_X3_HPP
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282
include/mapnik/json/feature_grammar_x3_def.hpp
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282
include/mapnik/json/feature_grammar_x3_def.hpp
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/*****************************************************************************
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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) 2016 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_JSON_FEATURE_GRAMMAR_X3_DEF_HPP
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#define MAPNIK_JSON_FEATURE_GRAMMAR_X3_DEF_HPP
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#include <mapnik/json/json_grammar_config.hpp>
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#include <mapnik/json/feature_grammar_x3.hpp>
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#include <mapnik/json/generic_json_grammar_x3.hpp>
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#include <mapnik/json/unicode_string_grammar_x3.hpp>
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#include <mapnik/json/positions_grammar_x3.hpp>
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#include <mapnik/json/positions_x3.hpp>
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#include <mapnik/json/create_geometry.hpp>
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#include <mapnik/util/conversions.hpp>
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#include <mapnik/value.hpp>
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#include <mapnik/geometry/geometry_types.hpp>
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namespace mapnik { namespace json {
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struct stringifier
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{
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std::string operator()(std::string const& val) const
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{
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return "\"" + val + "\"";
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}
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std::string operator()(value_null) const
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{
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return "null";
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}
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std::string operator()(value_bool val) const
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{
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return val ? "true" : "false";
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}
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std::string operator()(value_integer val) const
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{
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std::string str;
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util::to_string(str, val);
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return str;
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}
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std::string operator()(value_double val) const
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{
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std::string str;
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util::to_string(str, val);
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return str;
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}
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std::string operator()(std::vector<mapnik::json::json_value> const& array) const
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{
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std::string str = "[";
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bool first = true;
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for (auto const& val : array)
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{
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if (first) first = false;
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else str += ",";
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str += mapnik::util::apply_visitor(*this, val);
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}
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str += "]";
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return str;
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}
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std::string operator()(std::vector<std::pair<std::string, mapnik::json::json_value>> const& object) const
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{
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std::string str = "{";
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bool first = true;
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for (auto const& kv : object)
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{
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if (first) first = false;
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else str += ",";
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str += "\"" + kv.first + "\"";
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str += ":";
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str += mapnik::util::apply_visitor(*this, kv.second);
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}
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str += "}";
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return str;
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}
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};
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struct 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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mapnik::value operator()(std::vector<mapnik::json::json_value> const& array) const
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{
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std::string str = stringifier()(array);
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return mapnik::value(tr_.transcode(str.c_str()));
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}
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mapnik::value operator()(std::vector<std::pair<std::string, mapnik::json::json_value> > const& object) const
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{
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std::string str = stringifier()(object);
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return mapnik::value(tr_.transcode(str.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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namespace grammar {
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namespace x3 = boost::spirit::x3;
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using x3::lit;
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using x3::omit;
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using x3::char_;
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namespace {
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auto const& value = generic_json_grammar();
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// import unicode string rule
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auto const& geojson_string = unicode_string_grammar();
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// import positions rule
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auto const& positions_rule = positions_grammar();
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}
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// geometry types symbols
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struct geometry_type_ : x3::symbols<mapnik::geometry::geometry_types>
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{
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geometry_type_()
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{
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add
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("\"Point\"", mapnik::geometry::geometry_types::Point)
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("\"LineString\"", mapnik::geometry::geometry_types::LineString)
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("\"Polygon\"", mapnik::geometry::geometry_types::Polygon)
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("\"MultiPoint\"", mapnik::geometry::geometry_types::MultiPoint)
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("\"MultiLineString\"", mapnik::geometry::geometry_types::MultiLineString )
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("\"MultiPolygon\"",mapnik::geometry::geometry_types::MultiPolygon)
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("\"GeometryCollection\"",mapnik::geometry::geometry_types::GeometryCollection)
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;
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}
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} geometry_type_symbols;
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auto assign_name = [](auto const& ctx)
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{
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std::get<0>(_val(ctx)) = std::move(_attr(ctx));
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};
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auto assign_value = [](auto const& ctx)
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{
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std::get<1>(_val(ctx)) = std::move(_attr(ctx));
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};
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auto const assign_geometry_type = [] (auto const& ctx)
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{
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std::get<0>(_val(ctx)) = _attr(ctx);
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};
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auto const assign_geometry = [] (auto const& ctx)
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{
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mapnik::feature_impl & feature = x3::get<grammar::feature_tag>(ctx);
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mapnik::geometry::geometry<double> geom;
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auto const type = std::get<0>(_attr(ctx));
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auto const& coordinates = std::get<1>(_attr(ctx));
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mapnik::json::create_geometry(geom, type, coordinates);
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feature.set_geometry(std::move(geom));
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};
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auto const assign_positions = [] (auto const& ctx)
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{
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std::get<1>(_val(ctx)) = std::move(_attr(ctx));
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};
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auto assign_property = [](auto const& ctx)
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{
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mapnik::feature_impl & feature = x3::get<grammar::feature_tag>(ctx);
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mapnik::transcoder const& tr = x3::get<grammar::transcoder_tag>(ctx);
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feature.put_new(std::get<0>(_attr(ctx)),
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mapnik::util::apply_visitor(attribute_value_visitor(tr),
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std::get<1>(_attr(ctx))));
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};
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//exported rules
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feature_grammar_type const feature_rule = "Feature";
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geometry_grammar_type const geometry_rule = "Geometry";
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// rules
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x3::rule<struct feature_type_tag> const feature_type = "Feature Type";
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x3::rule<struct geometry_type_tag, mapnik::geometry::geometry_types> const geometry_type = "Geometry Type";
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x3::rule<struct coordinates_tag, mapnik::json::positions> const coordinates = "Coordinates";
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x3::rule<struct geometry_tag, std::tuple<mapnik::geometry::geometry_types, mapnik::json::positions>> const geometry_tuple = "Geometry";
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x3::rule<struct property_tag, std::tuple<std::string, json_value>> const property = "Property";
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x3::rule<struct properties_tag> const properties = "Properties";
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x3::rule<struct feature_part_rule_tag> const feature_part = "Feature part";
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auto const feature_type_def = lit("\"type\"") > lit(':') > lit("\"Feature\"");
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auto const geometry_type_def = lit("\"type\"") > lit(':') > geometry_type_symbols;
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auto const coordinates_def = lit("\"coordinates\"") > lit(':') > positions_rule;
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auto const geometry_tuple_def = (geometry_type[assign_geometry_type]
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coordinates[assign_positions]
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(omit[geojson_string] > lit(':') > omit[value])) % lit(',');
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auto const property_def = geojson_string[assign_name] > lit(':') > value[assign_value];
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auto const properties_def = property[assign_property] % lit(',');
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auto const feature_part_def = feature_type
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(lit("\"geometry\"") > lit(':') > lit('{') > geometry_tuple[assign_geometry] > lit('}'))
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(lit("\"properties\"") > lit(':') > lit('{') > properties > lit('}'))
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omit[geojson_string] > lit(':') > omit[value]
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;
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auto const feature_rule_def = lit('{') > feature_part % lit(',') > lit('}');
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auto const geometry_rule_def = lit('{') > geometry_tuple[assign_geometry] > lit('}');
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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BOOST_SPIRIT_DEFINE(
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feature_type,
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geometry_type,
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coordinates,
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geometry_tuple,
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property,
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properties,
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feature_part,
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feature_rule,
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geometry_rule
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);
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#pragma GCC diagnostic pop
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}}}
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namespace mapnik { namespace json {
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grammar::feature_grammar_type const& feature_grammar()
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{
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return grammar::feature_rule;
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}
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grammar::geometry_grammar_type const& geometry_grammar()
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{
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return grammar::geometry_rule;
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}
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}}
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#endif // MAPNIK_JSON_FEATURE_GRAMMAR_X3_DEF_HPP
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34
src/json/feature_grammar_x3.cpp
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34
src/json/feature_grammar_x3.cpp
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@ -0,0 +1,34 @@
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/*****************************************************************************
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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) 2016 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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#include <mapnik/json/json_grammar_config.hpp>
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#include <mapnik/json/feature_grammar_x3_def.hpp>
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namespace mapnik { namespace json { namespace grammar {
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BOOST_SPIRIT_INSTANTIATE(geometry_grammar_type, iterator_type, geometry_context_type);
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BOOST_SPIRIT_INSTANTIATE(feature_grammar_type, iterator_type, feature_context_type);
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BOOST_SPIRIT_INSTANTIATE_UNUSED(geometry_grammar_type, iterator_type, geometry_context_type);
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BOOST_SPIRIT_INSTANTIATE_UNUSED(feature_grammar_type, iterator_type, feature_context_type);
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BOOST_SPIRIT_INSTANTIATE_UNUSED(feature_grammar_type, iterator_type, feature_context_const_type);
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}}}
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