205 lines
6.8 KiB
C++
205 lines
6.8 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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#include <boost/python/implicit.hpp>
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#include <boost/python/detail/api_placeholder.hpp>
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#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
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#include <mapnik/rule.hpp>
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#include <mapnik/filter_factory.hpp>
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#include <mapnik/expression_string.hpp>
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using mapnik::rule;
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using mapnik::expr_node;
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using mapnik::expression_ptr;
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using mapnik::Feature;
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using mapnik::point_symbolizer;
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using mapnik::line_symbolizer;
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using mapnik::line_pattern_symbolizer;
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using mapnik::polygon_symbolizer;
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using mapnik::polygon_pattern_symbolizer;
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using mapnik::raster_symbolizer;
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using mapnik::shield_symbolizer;
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using mapnik::text_symbolizer;
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using mapnik::building_symbolizer;
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using mapnik::markers_symbolizer;
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using mapnik::glyph_symbolizer;
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using mapnik::symbolizer;
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using mapnik::to_expression_string;
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struct pickle_symbolizer : public boost::static_visitor<>
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{
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public:
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pickle_symbolizer( boost::python::list syms):
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syms_(syms) {}
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template <typename T>
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void operator () ( T const& sym )
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{
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syms_.append(sym);
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}
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private:
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boost::python::list syms_;
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};
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struct extract_symbolizer : public boost::static_visitor<>
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{
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public:
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extract_symbolizer( rule& r):
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r_(r) {}
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template <typename T>
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void operator () ( T const& sym )
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{
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r_.append(sym);
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}
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private:
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rule& r_;
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};
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struct rule_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const rule& r)
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{
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return boost::python::make_tuple(r.get_name(),r.get_title(),r.get_min_scale(),r.get_max_scale());
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}
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static boost::python::tuple
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getstate(const rule& r)
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{
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boost::python::list syms;
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rule::symbolizers::const_iterator begin = r.get_symbolizers().begin();
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rule::symbolizers::const_iterator end = r.get_symbolizers().end();
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pickle_symbolizer serializer( syms );
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std::for_each( begin, end , boost::apply_visitor( serializer ));
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// We serialize filter expressions AST as strings
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std::string filter_expr = to_expression_string(*r.get_filter());
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return boost::python::make_tuple(r.get_abstract(),filter_expr,r.has_else_filter(),r.has_also_filter(),syms);
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}
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static void
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setstate (rule& r, boost::python::tuple state)
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{
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using namespace boost::python;
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if (len(state) != 4)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 4-item tuple in call to __setstate__; got %s"
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% state).ptr()
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);
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throw_error_already_set();
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}
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if (state[0])
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{
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r.set_title(extract<std::string>(state[0]));
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}
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if (state[1])
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{
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rule dfl;
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std::string filter = extract<std::string>(state[1]);
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std::string default_filter = "<TODO>";//dfl.get_filter()->to_string();
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if ( filter != default_filter)
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{
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r.set_filter(mapnik::parse_expression(filter,"utf8"));
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}
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}
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if (state[2])
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{
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r.set_else(true);
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}
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if (state[3])
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{
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r.set_also(true);
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}
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boost::python::list syms=extract<boost::python::list>(state[4]);
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extract_symbolizer serializer( r );
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for (int i=0;i<len(syms);++i)
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{
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symbolizer symbol = extract<symbolizer>(syms[i]);
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boost::apply_visitor( serializer, symbol );
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}
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}
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};
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void export_rule()
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{
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using namespace boost::python;
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implicitly_convertible<point_symbolizer,symbolizer>();
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implicitly_convertible<line_symbolizer,symbolizer>();
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implicitly_convertible<line_pattern_symbolizer,symbolizer>();
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implicitly_convertible<polygon_symbolizer,symbolizer>();
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implicitly_convertible<building_symbolizer,symbolizer>();
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implicitly_convertible<polygon_pattern_symbolizer,symbolizer>();
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implicitly_convertible<raster_symbolizer,symbolizer>();
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implicitly_convertible<shield_symbolizer,symbolizer>();
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implicitly_convertible<text_symbolizer,symbolizer>();
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implicitly_convertible<glyph_symbolizer,symbolizer>();
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implicitly_convertible<markers_symbolizer,symbolizer>();
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class_<rule::symbolizers>("Symbolizers",init<>("TODO"))
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.def(vector_indexing_suite<rule::symbolizers>())
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;
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class_<rule>("Rule",init<>("default constructor"))
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.def(init<std::string const&,
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boost::python::optional<std::string const&,double,double> >())
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.def_pickle(rule_pickle_suite())
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.add_property("name",make_function
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(&rule::get_name,
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return_value_policy<copy_const_reference>()),
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&rule::set_name)
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.add_property("title",make_function
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(&rule::get_title,return_value_policy<copy_const_reference>()),
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&rule::set_title)
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.add_property("abstract",make_function
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(&rule::get_abstract,return_value_policy<copy_const_reference>()),
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&rule::set_abstract)
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.add_property("filter",make_function
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(&rule::get_filter,return_value_policy<copy_const_reference>()),
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&rule::set_filter)
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.add_property("min_scale",&rule::get_min_scale,&rule::set_min_scale)
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.add_property("max_scale",&rule::get_max_scale,&rule::set_max_scale)
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.def("set_else",&rule::set_else)
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.def("has_else",&rule::has_else_filter)
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.def("set_also",&rule::set_also)
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.def("has_also",&rule::has_also_filter)
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.def("active",&rule::active)
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.add_property("symbols",make_function
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(&rule::get_symbolizers,return_value_policy<reference_existing_object>()))
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;
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}
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