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