225 lines
7 KiB
C++
225 lines
7 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) 2011 Artem Pavlenko
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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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// boost
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#include <boost/python.hpp>
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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/params.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/value_types.hpp>
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#include <mapnik/value.hpp>
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// stl
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#include <iterator>
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using mapnik::parameter;
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using mapnik::parameters;
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struct parameter_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const parameter& p)
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{
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using namespace boost::python;
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return boost::python::make_tuple(p.first,p.second);
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}
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};
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struct parameters_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getstate(const parameters& p)
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{
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using namespace boost::python;
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dict d;
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parameters::const_iterator pos=p.begin();
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while(pos!=p.end())
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{
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d[pos->first] = pos->second;
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++pos;
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}
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return boost::python::make_tuple(d);
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}
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static void setstate(parameters& p, boost::python::tuple state)
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{
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using namespace boost::python;
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if (len(state) != 1)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 1-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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dict d = extract<dict>(state[0]);
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boost::python::list keys = d.keys();
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for (int i=0; i<len(keys); ++i)
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{
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std::string key = extract<std::string>(keys[i]);
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object obj = d[key];
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extract<std::string> ex0(obj);
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extract<mapnik::value_integer> ex1(obj);
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extract<double> ex2(obj);
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extract<mapnik::value_unicode_string> ex3(obj);
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// TODO - this is never hit - we need proper python string -> std::string to get invoked here
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if (ex0.check())
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{
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p[key] = ex0();
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}
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else if (ex1.check())
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{
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p[key] = ex1();
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}
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else if (ex2.check())
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{
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p[key] = ex2();
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}
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else if (ex3.check())
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{
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std::string buffer;
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mapnik::to_utf8(ex3(),buffer);
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p[key] = buffer;
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}
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else
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{
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MAPNIK_LOG_DEBUG(bindings) << "parameters_pickle_suite: Could not unpickle key=" << key;
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}
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}
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}
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};
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mapnik::value_holder get_params_by_key1(mapnik::parameters const& p, std::string const& key)
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{
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parameters::const_iterator pos = p.find(key);
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if (pos != p.end())
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{
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// will be auto-converted to proper python type by `mapnik_params_to_python`
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return pos->second;
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}
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return mapnik::value_null();
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}
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mapnik::value_holder get_params_by_key2(mapnik::parameters const& p, std::string const& key)
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{
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parameters::const_iterator pos = p.find(key);
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if (pos == p.end())
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{
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PyErr_SetString(PyExc_KeyError, key.c_str());
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boost::python::throw_error_already_set();
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}
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// will be auto-converted to proper python type by `mapnik_params_to_python`
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return pos->second;
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}
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mapnik::parameter get_params_by_index(mapnik::parameters const& p, int index)
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{
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if (index < 0 || static_cast<unsigned>(index) > p.size())
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{
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PyErr_SetString(PyExc_IndexError, "Index is out of range");
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throw boost::python::error_already_set();
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}
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parameters::const_iterator itr = p.begin();
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std::advance(itr, index);
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if (itr != p.end())
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{
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return *itr;
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}
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PyErr_SetString(PyExc_IndexError, "Index is out of range");
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throw boost::python::error_already_set();
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}
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void add_parameter(mapnik::parameters & p, mapnik::parameter const& param)
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{
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p[param.first] = param.second;
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}
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mapnik::value_holder get_param(mapnik::parameter const& p, int index)
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{
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if (index == 0)
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{
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return p.first;
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}
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else if (index == 1)
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{
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return p.second;
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}
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else
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{
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PyErr_SetString(PyExc_IndexError, "Index is out of range");
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throw boost::python::error_already_set();
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}
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}
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std::shared_ptr<mapnik::parameter> create_parameter(mapnik::value_unicode_string const& key, mapnik::value_holder const& value)
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{
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std::string key_utf8;
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mapnik::to_utf8(key, key_utf8);
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return std::make_shared<mapnik::parameter>(key_utf8,value);
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}
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// needed for Python_Unicode to std::string (utf8) conversion
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std::shared_ptr<mapnik::parameter> create_parameter_from_string(mapnik::value_unicode_string const& key, mapnik::value_unicode_string const& ustr)
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{
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std::string key_utf8;
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std::string ustr_utf8;
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mapnik::to_utf8(key, key_utf8);
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mapnik::to_utf8(ustr,ustr_utf8);
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return std::make_shared<mapnik::parameter>(key_utf8, ustr_utf8);
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}
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void export_parameters()
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{
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using namespace boost::python;
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implicitly_convertible<std::string,mapnik::value_holder>();
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implicitly_convertible<mapnik::value_null,mapnik::value_holder>();
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implicitly_convertible<mapnik::value_integer,mapnik::value_holder>();
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implicitly_convertible<mapnik::value_double,mapnik::value_holder>();
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class_<parameter,std::shared_ptr<parameter> >("Parameter",no_init)
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.def("__init__", make_constructor(create_parameter),
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"Create a mapnik.Parameter from a pair of values, the first being a string\n"
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"and the second being either a string, and integer, or a float")
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.def("__init__", make_constructor(create_parameter_from_string),
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"Create a mapnik.Parameter from a pair of values, the first being a string\n"
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"and the second being either a string, and integer, or a float")
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.def_pickle(parameter_pickle_suite())
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.def("__getitem__",get_param)
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;
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class_<parameters>("Parameters",init<>())
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.def_pickle(parameters_pickle_suite())
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.def("get",get_params_by_key1)
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.def("__getitem__",get_params_by_key2)
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.def("__getitem__",get_params_by_index)
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.def("__len__",¶meters::size)
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.def("append",add_parameter)
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.def("iteritems",iterator<parameters>())
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;
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}
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