204 lines
7 KiB
C++
204 lines
7 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
// boost
|
|
#include "boost_std_shared_shim.hpp"
|
|
#include <boost/python.hpp>
|
|
#include <boost/noncopyable.hpp>
|
|
#include <boost/version.hpp>
|
|
|
|
// stl
|
|
#include <vector>
|
|
|
|
// mapnik
|
|
#include <mapnik/box2d.hpp>
|
|
#include <mapnik/datasource.hpp>
|
|
#include <mapnik/datasource_cache.hpp>
|
|
#include <mapnik/feature_layer_desc.hpp>
|
|
#include <mapnik/memory_datasource.hpp>
|
|
|
|
|
|
using mapnik::datasource;
|
|
using mapnik::memory_datasource;
|
|
using mapnik::layer_descriptor;
|
|
using mapnik::attribute_descriptor;
|
|
|
|
namespace
|
|
{
|
|
//user-friendly wrapper that uses Python dictionary
|
|
using namespace boost::python;
|
|
std::shared_ptr<mapnik::datasource> create_datasource(dict const& d)
|
|
{
|
|
mapnik::parameters params;
|
|
boost::python::list keys=d.keys();
|
|
for (int i=0; i < len(keys); ++i)
|
|
{
|
|
std::string key = extract<std::string>(keys[i]);
|
|
object obj = d[key];
|
|
if (PyUnicode_Check(obj.ptr()))
|
|
{
|
|
PyObject* temp = PyUnicode_AsUTF8String(obj.ptr());
|
|
if (temp)
|
|
{
|
|
#if PY_VERSION_HEX >= 0x03000000
|
|
char* c_str = PyBytes_AsString(temp);
|
|
#else
|
|
char* c_str = PyString_AsString(temp);
|
|
#endif
|
|
params[key] = std::string(c_str);
|
|
Py_DecRef(temp);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
extract<std::string> ex0(obj);
|
|
extract<mapnik::value_integer> ex1(obj);
|
|
extract<double> ex2(obj);
|
|
if (ex0.check())
|
|
{
|
|
params[key] = ex0();
|
|
}
|
|
else if (ex1.check())
|
|
{
|
|
params[key] = ex1();
|
|
}
|
|
else if (ex2.check())
|
|
{
|
|
params[key] = ex2();
|
|
}
|
|
}
|
|
|
|
return mapnik::datasource_cache::instance().create(params);
|
|
}
|
|
|
|
boost::python::dict describe(std::shared_ptr<mapnik::datasource> const& ds)
|
|
{
|
|
boost::python::dict description;
|
|
mapnik::layer_descriptor ld = ds->get_descriptor();
|
|
description["type"] = ds->type();
|
|
description["name"] = ld.get_name();
|
|
description["geometry_type"] = ds->get_geometry_type();
|
|
description["encoding"] = ld.get_encoding();
|
|
return description;
|
|
}
|
|
|
|
boost::python::list fields(std::shared_ptr<mapnik::datasource> const& ds)
|
|
{
|
|
boost::python::list flds;
|
|
if (ds)
|
|
{
|
|
layer_descriptor ld = ds->get_descriptor();
|
|
std::vector<attribute_descriptor> const& desc_ar = ld.get_descriptors();
|
|
std::vector<attribute_descriptor>::const_iterator it = desc_ar.begin();
|
|
std::vector<attribute_descriptor>::const_iterator end = desc_ar.end();
|
|
for (; it != end; ++it)
|
|
{
|
|
flds.append(it->get_name());
|
|
}
|
|
}
|
|
return flds;
|
|
}
|
|
boost::python::list field_types(std::shared_ptr<mapnik::datasource> const& ds)
|
|
{
|
|
boost::python::list fld_types;
|
|
if (ds)
|
|
{
|
|
layer_descriptor ld = ds->get_descriptor();
|
|
std::vector<attribute_descriptor> const& desc_ar = ld.get_descriptors();
|
|
std::vector<attribute_descriptor>::const_iterator it = desc_ar.begin();
|
|
std::vector<attribute_descriptor>::const_iterator end = desc_ar.end();
|
|
for (; it != end; ++it)
|
|
{
|
|
unsigned type = it->get_type();
|
|
if (type == mapnik::Integer)
|
|
// this crashes, so send back strings instead
|
|
//fld_types.append(boost::python::object(boost::python::handle<>(&PyInt_Type)));
|
|
fld_types.append(boost::python::str("int"));
|
|
else if (type == mapnik::Float)
|
|
fld_types.append(boost::python::str("float"));
|
|
else if (type == mapnik::Double)
|
|
fld_types.append(boost::python::str("float"));
|
|
else if (type == mapnik::String)
|
|
fld_types.append(boost::python::str("str"));
|
|
else if (type == mapnik::Boolean)
|
|
fld_types.append(boost::python::str("bool"));
|
|
else if (type == mapnik::Geometry)
|
|
fld_types.append(boost::python::str("geometry"));
|
|
else if (type == mapnik::Object)
|
|
fld_types.append(boost::python::str("object"));
|
|
else
|
|
fld_types.append(boost::python::str("unknown"));
|
|
}
|
|
}
|
|
return fld_types;
|
|
}}
|
|
|
|
mapnik::parameters const& (mapnik::datasource::*params_const)() const = &mapnik::datasource::params;
|
|
|
|
|
|
void export_datasource()
|
|
{
|
|
using namespace boost::python;
|
|
|
|
enum_<mapnik::datasource::datasource_t>("DataType")
|
|
.value("Vector",mapnik::datasource::Vector)
|
|
.value("Raster",mapnik::datasource::Raster)
|
|
;
|
|
|
|
enum_<mapnik::datasource::geometry_t>("DataGeometryType")
|
|
.value("Point",mapnik::datasource::Point)
|
|
.value("LineString",mapnik::datasource::LineString)
|
|
.value("Polygon",mapnik::datasource::Polygon)
|
|
.value("Collection",mapnik::datasource::Collection)
|
|
;
|
|
|
|
class_<datasource,std::shared_ptr<datasource>,
|
|
boost::noncopyable>("Datasource",no_init)
|
|
.def("type",&datasource::type)
|
|
.def("geometry_type",&datasource::get_geometry_type)
|
|
.def("describe",&describe)
|
|
.def("envelope",&datasource::envelope)
|
|
.def("features",&datasource::features)
|
|
.def("fields",&fields)
|
|
.def("field_types",&field_types)
|
|
.def("features_at_point",&datasource::features_at_point, (arg("coord"),arg("tolerance")=0))
|
|
.def("params",make_function(params_const,return_value_policy<copy_const_reference>()),
|
|
"The configuration parameters of the data source. "
|
|
"These vary depending on the type of data source.")
|
|
.def(self == self)
|
|
;
|
|
|
|
def("CreateDatasource",&create_datasource);
|
|
|
|
class_<memory_datasource,
|
|
bases<datasource>, std::shared_ptr<memory_datasource>,
|
|
boost::noncopyable>("MemoryDatasource", init<>())
|
|
.def("add_feature",&memory_datasource::push,
|
|
"Adds a Feature:\n"
|
|
">>> ms = MemoryDatasource()\n"
|
|
">>> feature = Feature(1)\n"
|
|
">>> ms.add_feature(Feature(1))\n")
|
|
.def("num_features",&memory_datasource::size)
|
|
;
|
|
|
|
implicitly_convertible<std::shared_ptr<memory_datasource>,std::shared_ptr<datasource> >();
|
|
}
|