86 lines
2.8 KiB
C++
86 lines
2.8 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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//$Id$
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#include <boost/python.hpp>
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// mapnik
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#include <mapnik/filter_factory.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/path_expression_grammar.hpp>
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#include <boost/variant.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,"utf8");
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}
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std::string expression_evaluate_(mapnik::expr_node const& expr, mapnik::Feature const& f)
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{
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mapnik::value result = boost::apply_visitor(mapnik::evaluate<mapnik::Feature,mapnik::value>(f),expr);
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return result.to_string();
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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 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_)
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.def("__str__",&to_expression_string);
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;
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def("Expression",&parse_expression_);
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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_);
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}
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