/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon * * 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 * *****************************************************************************/ // boost #include <boost/python.hpp> #include <boost/variant.hpp> // mapnik #include <mapnik/feature.hpp> #include <mapnik/expression.hpp> #include <mapnik/expression_string.hpp> #include <mapnik/expression_evaluator.hpp> #include <mapnik/parse_path.hpp> #include <mapnik/value.hpp> using mapnik::Feature; using mapnik::expression_ptr; using mapnik::parse_expression; using mapnik::to_expression_string; using mapnik::path_expression_ptr; // expression expression_ptr parse_expression_(std::string const& wkt) { return parse_expression(wkt,"utf8"); } std::string expression_to_string_(mapnik::expr_node const& expr) { return mapnik::to_expression_string(expr); } mapnik::value expression_evaluate_(mapnik::expr_node const& expr, mapnik::Feature const& f) { // will be auto-converted to proper python type by `mapnik_value_to_python` return boost::apply_visitor(mapnik::evaluate<mapnik::Feature,mapnik::value>(f),expr); } // path expression path_expression_ptr parse_path_(std::string const& path) { return mapnik::parse_path(path); } std::string path_to_string_(mapnik::path_expression const& expr) { return mapnik::path_processor_type::to_string(expr); } std::string path_evaluate_(mapnik::path_expression const& expr, mapnik::Feature const& f) { return mapnik::path_processor_type::evaluate(expr, f); } void export_expression() { using namespace boost::python; class_<mapnik::expr_node ,boost::noncopyable>("Expression", "TODO" "",no_init) .def("evaluate", &expression_evaluate_) .def("__str__",&expression_to_string_); ; def("Expression",&parse_expression_,(arg("expr")),"Expression string"); class_<mapnik::path_expression ,boost::noncopyable>("PathExpression", "TODO" "",no_init) .def("evaluate", &path_evaluate_) // note: "pass" is a reserved word in Python .def("__str__",&path_to_string_); ; def("PathExpression",&parse_path_,(arg("expr")),"PathExpression string"); }