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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 Artem Pavlenko
*
* 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
*
*****************************************************************************/
#ifdef HAVE_LIBXML2
#error HAVE_LIBXML2 defined but compiling rapidxml_loader.cpp!
#endif
// mapnik
#include <mapnik/xml_loader.hpp>
#include <boost/property_tree/detail/xml_parser_read_rapidxml.hpp>
#include <mapnik/xml_node.hpp>
#include <mapnik/config_error.hpp>
// boost
#include <boost/utility.hpp>
#include <boost/algorithm/string/trim.hpp>
// stl
#include <iostream>
#include <fstream>
using namespace std;
namespace rapidxml = boost::property_tree::detail::rapidxml;
namespace mapnik
{
class rapidxml_loader : boost::noncopyable
{
public:
rapidxml_loader(const char *encoding = NULL) :
filename_()
{
}
~rapidxml_loader()
{
}
void load(std::string const& filename, xml_node &node)
{
filename_ = filename;
std::basic_ifstream<char> stream(filename.c_str());
if (!stream)
{
throw config_error("Could not load map file", 0, filename);
}
// TODO: stream.imbue(loc);
load(stream, node);
}
void load(std::basic_istream<char> &stream, xml_node &node)
{
stream.unsetf(std::ios::skipws);
std::vector<char> v(std::istreambuf_iterator<char>(stream.rdbuf()),
std::istreambuf_iterator<char>());
if (!stream.good())
{
throw config_error("Could not load map file", 0, filename_);
}
v.push_back(0); // zero-terminate
try
{
// Parse using appropriate flags
const int f_tws = rapidxml::parse_normalize_whitespace
| rapidxml::parse_trim_whitespace;
rapidxml::xml_document<> doc;
doc.parse<f_tws>(&v.front());
for (rapidxml::xml_node<char> *child = doc.first_node();
child; child = child->next_sibling())
{
populate_tree(child, node);
}
}
catch (rapidxml::parse_error &e)
{
long line = static_cast<long>(
std::count(&v.front(), e.where<char>(), '\n') + 1);
throw config_error(e.what(), line, filename_);
}
}
void load_string(std::string const& buffer, xml_node &node, std::string const & base_path )
{
// if (!base_path.empty())
// {
// boost::filesystem::path path(base_path);
// if (!boost::filesystem::exists(path)) {
// throw config_error(string("Could not locate base_path '") +
// base_path + "': file or directory does not exist");
// }
// }
load(buffer, node);
}
private:
void populate_tree(rapidxml::xml_node<char> *cur_node, xml_node &node)
{
switch (cur_node->type())
{
case rapidxml::node_element:
{
xml_node &new_node = node.add_child((char *)cur_node->name(), 0, false);
// Copy attributes
for (rapidxml::xml_attribute<char> *attr = cur_node->first_attribute();
attr; attr = attr->next_attribute())
{
new_node.add_attribute(attr->name(), attr->value());
}
// Copy children
for (rapidxml::xml_node<char> *child = cur_node->first_node();
child; child = child->next_sibling())
{
populate_tree(child, new_node);
}
}
break;
// Data nodes
case rapidxml::node_data:
case rapidxml::node_cdata:
{
std::string trimmed(cur_node->value());
boost::trim(trimmed);
if (trimmed.empty()) break; //Don't add empty text nodes
node.add_child(trimmed, 0, true);
}
break;
default:
break;
}
}
private:
std::string filename_;
};
void read_xml(std::string const & filename, xml_node &node)
{
rapidxml_loader loader;
loader.load(filename, node);
}
void read_xml_string(std::string const & str, xml_node &node, std::string const & base_path)
{
rapidxml_loader loader;
loader.load_string(str, node, base_path);
}
} // end of namespace mapnik
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