274 lines
7.6 KiB
C++
274 lines
7.6 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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#ifndef ATTRIBUTE_COLLECTOR_HPP
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#define ATTRIBUTE_COLLECTOR_HPP
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// mapnik
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#include <mapnik/feature_layer_desc.hpp>
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#include <mapnik/rule.hpp>
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#include <mapnik/path_expression_grammar.hpp>
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#include <mapnik/parse_path.hpp>
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// boost
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#include <boost/utility.hpp>
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#include <boost/variant.hpp>
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#include <boost/concept_check.hpp>
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// stl
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#include <set>
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#include <iostream>
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namespace mapnik {
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struct expression_attributes : boost::static_visitor<void>
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{
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explicit expression_attributes(std::set<std::string> & names)
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: names_(names) {}
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void operator() (value_type const& x) const
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{
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boost::ignore_unused_variable_warning(x);
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}
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void operator() (attribute const& attr) const
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{
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names_.insert(attr.name());
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}
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template <typename Tag>
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void operator() (binary_node<Tag> const& x) const
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{
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boost::apply_visitor(expression_attributes(names_),x.left);
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boost::apply_visitor(expression_attributes(names_),x.right);
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}
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template <typename Tag>
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void operator() (unary_node<Tag> const& x) const
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{
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boost::apply_visitor(expression_attributes(names_),x.expr);
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}
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void operator() (regex_match_node const& x) const
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{
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boost::apply_visitor(expression_attributes(names_),x.expr);
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}
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void operator() (regex_replace_node const& x) const
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{
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boost::apply_visitor(expression_attributes(names_),x.expr);
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}
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private:
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std::set<std::string>& names_;
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};
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struct symbolizer_attributes : public boost::static_visitor<>
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{
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symbolizer_attributes(std::set<std::string>& names)
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: names_(names) {}
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template <typename T>
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void operator () (T const&) const {}
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void operator () (text_symbolizer const& sym)
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{
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expression_ptr const& name_expr = sym.get_name();
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if (name_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*name_expr);
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}
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expression_ptr const& orientation_expr = sym.get_orientation();
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if (orientation_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*orientation_expr);
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}
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collect_metawriter(sym);
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}
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void operator () (point_symbolizer const& sym)
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{
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path_expression_ptr const& filename_expr = sym.get_filename();
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if (filename_expr)
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{
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path_processor_type::collect_attributes(*filename_expr,names_);
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}
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collect_metawriter(sym);
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}
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void operator () (line_symbolizer const& sym)
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{
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collect_metawriter(sym);
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}
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void operator () (line_pattern_symbolizer const& sym)
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{
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path_expression_ptr const& filename_expr = sym.get_filename();
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if (filename_expr)
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{
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path_processor_type::collect_attributes(*filename_expr,names_);
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}
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collect_metawriter(sym);
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}
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void operator () (polygon_symbolizer const& sym)
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{
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collect_metawriter(sym);
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}
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void operator () (polygon_pattern_symbolizer const& sym)
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{
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path_expression_ptr const& filename_expr = sym.get_filename();
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if (filename_expr)
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{
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path_processor_type::collect_attributes(*filename_expr,names_);
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}
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collect_metawriter(sym);
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}
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void operator () (shield_symbolizer const& sym)
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{
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expression_ptr const& name_expr = sym.get_name();
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if (name_expr)
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{
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expression_attributes name_attr(names_);
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boost::apply_visitor(name_attr,*name_expr);
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}
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path_expression_ptr const& filename_expr = sym.get_filename();
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if (filename_expr)
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{
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path_processor_type::collect_attributes(*filename_expr,names_);
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}
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collect_metawriter(sym);
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}
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void operator () (glyph_symbolizer const& sym)
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{
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expression_ptr const& char_expr = sym.get_char();
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if (char_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*char_expr);
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}
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expression_ptr const& angle_expr = sym.get_angle();
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if (angle_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*angle_expr);
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}
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expression_ptr const& value_expr = sym.get_value();
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if (value_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*value_expr);
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}
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expression_ptr const& size_expr = sym.get_size();
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if (size_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*size_expr);
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}
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expression_ptr const& color_expr = sym.get_color();
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if (color_expr)
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{
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*color_expr);
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}
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collect_metawriter(sym);
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}
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void operator () (markers_symbolizer const& sym)
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{
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collect_metawriter(sym);
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}
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void operator () (building_symbolizer const& sym)
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{
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collect_metawriter(sym);
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}
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// TODO - support remaining syms
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private:
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std::set<std::string>& names_;
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void collect_metawriter(symbolizer_base const& sym)
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{
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metawriter_properties const& properties = sym.get_metawriter_properties();
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names_.insert(properties.begin(), properties.end());
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}
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};
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class attribute_collector : public boost::noncopyable
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{
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private:
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std::set<std::string>& names_;
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public:
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attribute_collector(std::set<std::string>& names)
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: names_(names) {}
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template <typename RuleType>
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void operator() (RuleType const& r)
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{
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typename RuleType::symbolizers const& symbols = r.get_symbolizers();
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typename RuleType::symbolizers::const_iterator symIter=symbols.begin();
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symbolizer_attributes s_attr(names_);
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while (symIter != symbols.end())
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{
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boost::apply_visitor(s_attr,*symIter++);
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}
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expression_ptr const& expr = r.get_filter();
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expression_attributes f_attr(names_);
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boost::apply_visitor(f_attr,*expr);
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}
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};
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struct directive_collector : public boost::static_visitor<>
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{
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directive_collector(double * filter_factor)
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: filter_factor_(filter_factor) {}
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template <typename T>
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void operator () (T const&) const {}
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void operator () (raster_symbolizer const& sym)
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{
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*filter_factor_ = sym.calculate_filter_factor();
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}
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private:
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double * filter_factor_;
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};
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} // namespace mapnik
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#endif //ATTRIBUTE_COLLECTOR_HPP
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