105 lines
3.8 KiB
C++
105 lines
3.8 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) 2006 Artem Pavlenko, Jean-Francois Doyon
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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/config.hpp>
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#include "boost_std_shared_shim.hpp"
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#include "python_to_value.hpp"
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// boost
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#include <boost/python.hpp>
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#include <mapnik/util/variant.hpp>
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#include <boost/noncopyable.hpp>
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// mapnik
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#include <mapnik/feature.hpp>
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#include <mapnik/expression.hpp>
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#include <mapnik/expression_string.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/parse_path.hpp>
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#include <mapnik/value.hpp>
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using mapnik::expression_ptr;
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using mapnik::parse_expression;
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using mapnik::to_expression_string;
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using mapnik::path_expression_ptr;
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// expression
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expression_ptr parse_expression_(std::string const& wkt)
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{
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return parse_expression(wkt);
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}
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std::string expression_to_string_(mapnik::expr_node const& expr)
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{
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return mapnik::to_expression_string(expr);
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}
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mapnik::value expression_evaluate_(mapnik::expr_node const& expr, mapnik::feature_impl const& f, boost::python::dict const& d)
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{
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// will be auto-converted to proper python type by `mapnik_value_to_python`
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return mapnik::util::apply_visitor(mapnik::evaluate<mapnik::feature_impl,mapnik::value,mapnik::attributes>(f,mapnik::dict2attr(d)),expr);
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}
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bool expression_evaluate_to_bool_(mapnik::expr_node const& expr, mapnik::feature_impl const& f, boost::python::dict const& d)
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{
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return mapnik::util::apply_visitor(mapnik::evaluate<mapnik::feature_impl,mapnik::value,mapnik::attributes>(f,mapnik::dict2attr(d)),expr).to_bool();
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}
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// path expression
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path_expression_ptr parse_path_(std::string const& path)
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{
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return mapnik::parse_path(path);
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}
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std::string path_to_string_(mapnik::path_expression const& expr)
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{
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return mapnik::path_processor_type::to_string(expr);
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}
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std::string path_evaluate_(mapnik::path_expression const& expr, mapnik::feature_impl const& f)
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{
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return mapnik::path_processor_type::evaluate(expr, f);
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}
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void export_expression()
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{
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using namespace boost::python;
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class_<mapnik::expr_node ,boost::noncopyable>("Expression",
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"TODO"
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"",no_init)
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.def("evaluate", &expression_evaluate_,(arg("feature"),arg("variables")=boost::python::dict()))
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.def("to_bool", &expression_evaluate_to_bool_,(arg("feature"),arg("variables")=boost::python::dict()))
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.def("__str__",&expression_to_string_);
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;
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def("Expression",&parse_expression_,(arg("expr")),"Expression string");
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class_<mapnik::path_expression ,boost::noncopyable>("PathExpression",
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"TODO"
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"",no_init)
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.def("evaluate", &path_evaluate_) // note: "pass" is a reserved word in Python
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.def("__str__",&path_to_string_);
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;
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def("PathExpression",&parse_path_,(arg("expr")),"PathExpression string");
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}
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