454 lines
16 KiB
C++
454 lines
16 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
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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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// mapnik
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#include <mapnik/save_map.hpp>
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#include <mapnik/ptree_helpers.hpp>
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// boost
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#include <boost/algorithm/string.hpp>
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#include <boost/lexical_cast.hpp>
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#include <boost/tokenizer.hpp>
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#include <boost/optional.hpp>
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#include <boost/property_tree/ptree.hpp>
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#include <boost/property_tree/xml_parser.hpp>
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// stl
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#include <iostream>
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namespace mapnik
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{
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using boost::property_tree::ptree;
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using boost::optional;
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std::string guess_type( const std::string & filename )
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{
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std::string::size_type idx = filename.find_last_of(".");
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if ( idx != std::string::npos ) {
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return filename.substr( idx + 1 );
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}
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return "<unknown>";
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}
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class serialize_symbolizer : public boost::static_visitor<>
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{
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public:
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serialize_symbolizer( ptree & r ) : rule_(r) {}
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void operator () ( const point_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("PointSymbolizer", ptree()))->second;
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add_image_attributes( sym_node, sym );
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}
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void operator () ( const line_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("LineSymbolizer", ptree()))->second;
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const stroke & strk = sym.get_stroke();
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stroke dfl = stroke();
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if ( strk.get_color() != dfl.get_color() )
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{
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set_css( sym_node, "stroke", strk.get_color() );
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}
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if ( strk.get_width() != dfl.get_width() )
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{
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set_css( sym_node, "stroke-width", strk.get_width() );
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}
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if ( strk.get_opacity() != dfl.get_opacity() )
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{
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set_css( sym_node, "stroke-opacity", strk.get_opacity() );
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}
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if ( strk.get_line_join() != dfl.get_line_join() )
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{
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set_css( sym_node, "stroke-linejoin", strk.get_line_join() );
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}
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if ( strk.get_line_cap() != dfl.get_line_cap() )
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{
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set_css( sym_node, "stroke-linecap", strk.get_line_cap() );
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}
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if ( ! strk.get_dash_array().empty() )
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{
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std::ostringstream os;
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const dash_array & dashes = strk.get_dash_array();
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for (unsigned i = 0; i < dashes.size(); ++i) {
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os << dashes[i].first << ", " << dashes[i].second;
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if ( i + 1 < dashes.size() ) os << ", ";
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}
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set_css( sym_node, "stroke-dasharray", os.str() );
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}
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}
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void operator () ( const line_pattern_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("LinePatternSymbolizer",
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ptree()))->second;
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add_image_attributes( sym_node, sym );
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}
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void operator () ( const polygon_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("PolygonSymbolizer", ptree()))->second;
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polygon_symbolizer dfl;
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if ( sym.get_fill() != dfl.get_fill() )
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{
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set_css( sym_node, "fill", sym.get_fill() );
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}
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if ( sym.get_opacity() != dfl.get_opacity() )
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{
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set_css( sym_node, "opacity", sym.get_opacity() );
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}
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}
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void operator () ( const polygon_pattern_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("PolygonPatternSymbolizer",
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ptree()))->second;
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add_image_attributes( sym_node, sym );
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}
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void operator () ( const raster_symbolizer & sym )
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{
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rule_.push_back(
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ptree::value_type("RasterSymbolizer", ptree()));
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}
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void operator () ( const shield_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("ShieldSymbolizer",
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ptree()))->second;
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add_font_attributes( sym_node, sym);
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add_image_attributes( sym_node, sym);
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}
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void operator () ( const text_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("TextSymbolizer",
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ptree()))->second;
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add_font_attributes( sym_node, sym);
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}
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void operator () ( const building_symbolizer & sym )
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{
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ptree & sym_node = rule_.push_back(
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ptree::value_type("BuildingSymbolizer", ptree()))->second;
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building_symbolizer dfl;
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if ( sym.get_fill() != dfl.get_fill() )
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{
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set_css( sym_node, "fill", sym.get_fill() );
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}
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if ( sym.get_opacity() != dfl.get_opacity() )
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{
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set_css( sym_node, "fill-opacity", sym.get_opacity() );
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}
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}
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void operator () ( markers_symbolizer const& )
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{
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// FIXME!!!!!
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}
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private:
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serialize_symbolizer();
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void add_image_attributes(ptree & node, const symbolizer_with_image & sym)
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{
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const std::string & filename = sym.get_filename();
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if ( ! filename.empty() ) {
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set_attr( node, "file", filename );
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set_attr( node, "type", guess_type( filename ) );
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boost::shared_ptr<ImageData32> img = sym.get_image();
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if ( img )
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{
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if ( img->width() > 0)
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{
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set_attr( node, "width", img->width() );
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}
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if ( img->height() > 0)
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{
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set_attr( node, "height", img->height() );
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}
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}
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}
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}
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void add_font_attributes(ptree & node, const text_symbolizer & sym)
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{
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const std::string & name = sym.get_name();
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if ( ! name.empty() ) {
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set_attr( node, "name", name );
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}
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const std::string & face_name = sym.get_face_name();
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if ( ! face_name.empty() ) {
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set_attr( node, "face_name", face_name );
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}
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set_attr( node, "size", sym.get_text_size() );
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set_attr( node, "fill", sym.get_fill() );
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// pseudo-default-construct a text_symbolizer. It is used
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// to avoid printing ofattributes with default values without
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// repeating the default values here.
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// maybe add a real, explicit default-ctor?
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text_symbolizer dfl("<no default>", "<no default>",
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0, Color(0,0,0) );
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position displacement = sym.get_displacement();
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if ( displacement.get<0>() != dfl.get_displacement().get<0>() )
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{
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set_attr( node, "dx", displacement.get<0>() );
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}
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if ( displacement.get<1>() != dfl.get_displacement().get<1>() )
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{
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set_attr( node, "dy", displacement.get<1>() );
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}
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if (sym.get_label_placement() != dfl.get_label_placement() )
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{
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set_attr( node, "placement", sym.get_label_placement() );
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}
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if (sym.get_halo_radius() != dfl.get_halo_radius())
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{
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set_attr( node, "halo_radius", sym.get_halo_radius() );
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}
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const Color & c = sym.get_halo_fill();
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if ( c != dfl.get_halo_fill() )
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{
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set_attr( node, "halo_fill", c );
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}
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if (sym.get_text_ratio() != dfl.get_text_ratio() )
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{
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set_attr( node, "text_ratio", sym.get_text_ratio() );
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}
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if (sym.get_wrap_width() != dfl.get_wrap_width())
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{
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set_attr( node, "wrap_width", sym.get_wrap_width() );
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}
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if (sym.get_label_spacing() != dfl.get_label_spacing())
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{
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set_attr( node, "spacing", sym.get_label_spacing() );
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}
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if (sym.get_minimum_distance() != dfl.get_minimum_distance())
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{
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set_attr( node, "min_distance", sym.get_minimum_distance() );
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}
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if (sym.get_allow_overlap() != dfl.get_allow_overlap() )
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{
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set_attr( node, "allow_overlap", sym.get_allow_overlap() );
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}
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}
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ptree & rule_;
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};
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void serialize_rule( ptree & style_node, const rule_type & rule)
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{
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ptree & rule_node = style_node.push_back(
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ptree::value_type("Rule", ptree() ))->second;
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rule_type dfl;
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if ( rule.get_name() != dfl.get_name() )
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{
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set_attr(rule_node, "name", rule.get_name());
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}
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if ( rule.get_title() != dfl.get_title() )
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{
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set_attr(rule_node, "title", rule.get_title());
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}
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if ( rule.has_else_filter() )
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{
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rule_node.push_back( ptree::value_type(
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"ElseFilter", ptree()));
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}
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else
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{
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// filters are not comparable, so compare strings for now
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std::string filter = rule.get_filter()->to_string();
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std::string default_filter = dfl.get_filter()->to_string();
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if ( filter != default_filter)
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{
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rule_node.push_back( ptree::value_type(
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"Filter", ptree()))->second.put_own( filter );
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}
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}
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if (rule.get_min_scale() != dfl.get_min_scale())
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{
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ptree & min_scale = rule_node.push_back( ptree::value_type(
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"MinScaleDenominator", ptree()))->second;
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min_scale.put_own( rule.get_min_scale() );
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}
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if (rule.get_max_scale() != dfl.get_max_scale() )
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{
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ptree & max_scale = rule_node.push_back( ptree::value_type(
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"MaxScaleDenominator", ptree()))->second;
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max_scale.put_own( rule.get_max_scale() );
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}
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symbolizers::const_iterator begin = rule.get_symbolizers().begin();
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symbolizers::const_iterator end = rule.get_symbolizers().end();
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serialize_symbolizer serializer( rule_node );
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std::for_each( begin, end , boost::apply_visitor( serializer ));
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}
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void serialize_style( ptree & map_node, Map::const_style_iterator style_it )
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{
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const feature_type_style & style = style_it->second;
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const std::string & name = style_it->first;
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ptree & style_node = map_node.push_back(
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ptree::value_type("Style", ptree()))->second;
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set_attr(style_node, "name", name);
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rules::const_iterator it = style.get_rules().begin();
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rules::const_iterator end = style.get_rules().end();
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for (; it != end; ++it)
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{
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serialize_rule( style_node, * it );
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}
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}
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void serialize_datasource( ptree & layer_node, datasource_ptr datasource)
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{
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ptree & datasource_node = layer_node.push_back(
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ptree::value_type("Datasource", ptree()))->second;
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parameters::const_iterator it = datasource->params().begin();
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parameters::const_iterator end = datasource->params().end();
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for (; it != end; ++it)
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{
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boost::property_tree::ptree & param_node = datasource_node.push_back(
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boost::property_tree::ptree::value_type("Parameter",
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boost::property_tree::ptree()))->second;
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param_node.put("<xmlattr>.name", it->first );
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param_node.put_own( it->second );
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}
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}
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void serialize_layer( ptree & map_node, const Layer & layer )
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{
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ptree & layer_node = map_node.push_back(
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ptree::value_type("Layer", ptree()))->second;
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if ( layer.name() != "" )
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{
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set_attr( layer_node, "name", layer.name() );
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}
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if ( layer.abstract() != "" )
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{
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set_attr( layer_node, "abstract", layer.abstract() );
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}
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if ( layer.title() != "" )
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{
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set_attr( layer_node, "title", layer.title() );
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}
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if ( layer.srs() != "" )
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{
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set_attr( layer_node, "srs", layer.srs() );
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}
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set_attr/*<bool>*/( layer_node, "status", layer.isActive() );
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set_attr/*<bool>*/( layer_node, "clear_label_cache", layer.clear_label_cache() );
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if ( layer.getMinZoom() )
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{
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set_attr( layer_node, "minzoom", layer.getMinZoom() );
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}
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if ( layer.getMaxZoom() != std::numeric_limits<double>::max() )
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{
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set_attr( layer_node, "maxzoom", layer.getMaxZoom() );
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}
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if ( layer.isQueryable() )
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{
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set_attr( layer_node, "queryable", layer.isQueryable() );
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}
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std::vector<std::string> const& style_names = layer.styles();
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for (unsigned i = 0; i < style_names.size(); ++i)
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{
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boost::property_tree::ptree & style_node = layer_node.push_back(
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boost::property_tree::ptree::value_type("StyleName",
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boost::property_tree::ptree()))->second;
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style_node.put_own( style_names[i] );
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}
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datasource_ptr datasource = layer.datasource();
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if ( datasource )
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{
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serialize_datasource( layer_node, datasource );
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}
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}
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void save_map(Map const & map, std::string const& filename)
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{
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ptree pt;
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ptree & map_node = pt.push_back(ptree::value_type("Map", ptree() ))->second;
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set_attr( map_node, "srs", map.srs() );
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optional<Color> c = map.background();
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if ( c )
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{
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set_attr( map_node, "bgcolor", * c );
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}
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Map::const_style_iterator it = map.styles().begin();
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Map::const_style_iterator end = map.styles().end();
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for (; it != end; ++it)
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{
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serialize_style( map_node, it);
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}
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std::vector<Layer> const & layers = map.layers();
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for (unsigned i = 0; i < layers.size(); ++i )
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{
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serialize_layer( map_node, layers[i] );
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}
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write_xml(filename,pt);
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}
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}
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