428 lines
11 KiB
C++
428 lines
11 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) 2012 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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//mapnik
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#include <mapnik/xml_tree.hpp>
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#include <mapnik/util/conversions.hpp>
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#include <mapnik/enumeration.hpp>
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#include <mapnik/color_factory.hpp>
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#include <mapnik/gamma_method.hpp>
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#include <mapnik/line_symbolizer.hpp>
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#include <mapnik/feature_type_style.hpp>
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#include <mapnik/text_properties.hpp>
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//boost
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#include <boost/lexical_cast.hpp>
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namespace mapnik
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{
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template <typename T>
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inline boost::optional<T> fast_cast(xml_tree const& tree, std::string const& value)
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{
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return boost::lexical_cast<T>(value);
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}
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template <>
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inline boost::optional<int> fast_cast(xml_tree const& tree, std::string const& value)
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{
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int result;
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if (mapnik::conversions::string2int(value, result))
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return boost::optional<int>(result);
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return boost::optional<int>();
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}
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template <>
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inline boost::optional<double> fast_cast(xml_tree const& tree, std::string const& value)
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{
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double result;
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if (mapnik::conversions::string2double(value, result))
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return boost::optional<double>(result);
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return boost::optional<double>();
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}
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template <>
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inline boost::optional<float> fast_cast(xml_tree const& tree, std::string const& value)
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{
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float result;
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if (mapnik::conversions::string2float(value, result))
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return boost::optional<float>(result);
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return boost::optional<float>();
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}
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template <>
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inline boost::optional<std::string> fast_cast(xml_tree const& tree, std::string const& value)
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{
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return value;
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}
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template <>
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inline boost::optional<color> fast_cast(xml_tree const& tree, std::string const& value)
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{
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return mapnik::color_factory::from_string(value);
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}
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template <>
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inline boost::optional<expression_ptr> fast_cast(xml_tree const& tree, std::string const& value)
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{
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return parse_expression(value);
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}
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/****************************************************************************/
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class boolean;
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template <typename T>
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struct name_trait
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{
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static std::string name()
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{
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return "<unknown>";
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}
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// missing name_trait for type ...
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// if you get here you are probably using a new type
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// in the XML file. Just add a name trait for the new
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// type below.
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BOOST_STATIC_ASSERT( sizeof(T) == 0 );
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};
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#define DEFINE_NAME_TRAIT( type, type_name ) \
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template <> \
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struct name_trait<type> \
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{ \
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static std::string name() { return std::string("type ") + type_name; } \
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};
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DEFINE_NAME_TRAIT( double, "double")
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DEFINE_NAME_TRAIT( float, "float")
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DEFINE_NAME_TRAIT( unsigned, "unsigned")
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DEFINE_NAME_TRAIT( boolean, "boolean")
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DEFINE_NAME_TRAIT( int, "integer" )
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DEFINE_NAME_TRAIT( std::string, "string" )
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DEFINE_NAME_TRAIT( color, "color" )
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DEFINE_NAME_TRAIT(expression_ptr, "expression_ptr" )
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template <typename ENUM, int MAX>
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struct name_trait< mapnik::enumeration<ENUM, MAX> >
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{
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typedef enumeration<ENUM, MAX> Enum;
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static std::string name()
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{
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std::string value_list("one of [");
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for (unsigned i = 0; i < Enum::MAX; ++i)
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{
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value_list += Enum::get_string( i );
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if ( i + 1 < Enum::MAX ) value_list += ", ";
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}
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value_list += "]";
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return value_list;
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}
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};
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/****************************************************************************/
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xml_tree::xml_tree()
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: node_(*this, "<root>")
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{
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}
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void xml_tree::set_filename(std::string fn)
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{
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file_ = fn;
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}
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std::string xml_tree::filename() const
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{
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return file_;
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}
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xml_node &xml_tree::root()
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{
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return node_;
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}
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/****************************************************************************/
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xml_attribute::xml_attribute(std::string const& value_)
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: value(value_), processed(false)
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{
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}
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/****************************************************************************/
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node_not_found::node_not_found(std::string node_name)
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: node_name_(node_name)
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{
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}
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const char* node_not_found::what() const throw()
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{
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return ("Node "+node_name_+ "not found").c_str();
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}
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node_not_found::~node_not_found() throw()
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{
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}
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attribute_not_found::attribute_not_found(
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std::string const& node_name,
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std::string const& attribute_name)
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:
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node_name_(node_name),
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attribute_name_(attribute_name)
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{
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}
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const char* attribute_not_found::what() const throw()
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{
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return ("Attribute '" + attribute_name_ +"' not found in node '"+node_name_+ "'").c_str();
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}
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attribute_not_found::~attribute_not_found() throw()
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{
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}
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more_than_one_child::more_than_one_child(std::string const& node_name)
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: node_name_(node_name)
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{
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}
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const char* more_than_one_child::what() const throw()
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{
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return ("More than one child node in node '" + node_name_ +"'").c_str();
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}
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more_than_one_child::~more_than_one_child() throw()
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{
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}
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/****************************************************************************/
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xml_node::xml_node(xml_tree &tree, std::string name, unsigned line, bool text_node)
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: tree_(tree),
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name_(name),
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text_node_(text_node),
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line_(line),
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processed_(false)
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{
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}
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std::string xml_node::name() const
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{
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if (!text_node_)
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return name_;
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else
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return "<xmltext>";
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}
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std::string xml_node::text() const
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{
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if (text_node_)
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return name_;
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else
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return "NOT A TEXT NODE"; //TODO: throw
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}
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bool xml_node::is_text() const
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{
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return text_node_;
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}
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bool xml_node::is(std::string const& name) const
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{
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if (name_ == name)
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{
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processed_ = true;
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return true;
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}
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return false;
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}
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xml_node &xml_node::add_child(std::string const& name, unsigned line, bool text_node)
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{
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children_.push_back(xml_node(tree_, name, line, text_node));
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return children_.back();
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}
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void xml_node::add_attribute(std::string const& name, std::string const& value)
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{
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attributes_.insert(std::make_pair(name,xml_attribute(value)));
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}
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void xml_node::set_processed(bool processed) const
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{
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processed_ = processed;
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}
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xml_node::const_iterator xml_node::begin() const
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{
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return children_.begin();
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}
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xml_node::const_iterator xml_node::end() const
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{
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return children_.end();
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}
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xml_node & xml_node::get_child(std::string const& name)
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{
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std::list<xml_node>::iterator itr = children_.begin();
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std::list<xml_node>::iterator end = children_.end();
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for (; itr != end; itr++)
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{
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if (!(itr->text_node_) && itr->name_ == name)
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{
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itr->set_processed(true);
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return *itr;
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}
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}
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throw node_not_found(name);
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}
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xml_node const& xml_node::get_child(std::string const& name) const
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{
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xml_node const* node = get_opt_child(name);
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if (!node) throw node_not_found(name);
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return *node;
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}
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xml_node const* xml_node::get_opt_child(std::string const& name) const
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{
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const_iterator itr = children_.begin();
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const_iterator end = children_.end();
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for (; itr != end; itr++)
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{
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if (!(itr->text_node_) && itr->name_ == name)
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{
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itr->set_processed(true);
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return &(*itr);
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}
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}
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return 0;
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}
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bool xml_node::has_child(std::string const& name) const
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{
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return get_opt_child(name) != 0;
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}
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template <typename T>
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boost::optional<T> xml_node::get_opt_attr(std::string const& name) const
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{
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std::map<std::string, xml_attribute>::const_iterator itr = attributes_.find(name);
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if (itr == attributes_.end()) return boost::optional<T>();
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itr->second.processed = true;
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boost::optional<T> result = fast_cast<T>(tree_, itr->second.value);
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if (!result)
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{
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throw config_error(std::string("Failed to parse attribute '") +
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name + "'. Expected " + name_trait<T>::name() +
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" but got '" + itr->second.value + "'");
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}
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return result;
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}
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template <typename T>
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T xml_node::get_attr(std::string const& name, T const& default_value) const
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{
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boost::optional<T> value = get_opt_attr<T>(name);
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if (value) return *value;
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return default_value;
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}
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template <typename T>
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T xml_node::get_attr(std::string const& name) const
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{
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boost::optional<T> value = get_opt_attr<T>(name);
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if (value) return *value;
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throw attribute_not_found(name_, name);
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}
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std::string xml_node::get_text() const
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{
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if (children_.size() == 0)
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{
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return "";
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}
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if (children_.size() == 1)
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{
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return children_.front().text();
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}
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throw more_than_one_child(name_);
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}
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template <typename T>
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T xml_node::get_value() const
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{
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boost::optional<T> result = fast_cast<T>(tree_, get_text());
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if (!result)
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{
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throw config_error(std::string("Failed to parse value in node '") +
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name_ + "'. Expected " + name_trait<T>::name() +
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" but got '" + get_text() + "'");
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}
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return *result;
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}
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#define compile_get_opt_attr(T) template boost::optional<T> xml_node::get_opt_attr<T>(std::string const&) const
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#define compile_get_attr(T) template T xml_node::get_attr<T>(std::string const&) const; template T xml_node::get_attr<T>(std::string const&, T const&) const
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#define compile_get_value(T) template T xml_node::get_value<T>() const
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compile_get_opt_attr(boolean);
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compile_get_opt_attr(std::string);
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compile_get_opt_attr(unsigned);
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compile_get_opt_attr(float);
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compile_get_opt_attr(double);
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compile_get_opt_attr(color);
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compile_get_opt_attr(gamma_method_e);
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compile_get_opt_attr(line_rasterizer_e);
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compile_get_opt_attr(line_join_e);
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compile_get_opt_attr(line_cap_e);
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compile_get_opt_attr(text_transform_e);
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compile_get_opt_attr(label_placement_e);
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compile_get_opt_attr(vertical_alignment_e);
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compile_get_opt_attr(horizontal_alignment_e);
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compile_get_opt_attr(justify_alignment_e);
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compile_get_attr(std::string);
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compile_get_attr(filter_mode_e);
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compile_get_attr(point_placement_e);
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compile_get_attr(marker_placement_e);
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compile_get_attr(marker_type_e);
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compile_get_attr(pattern_alignment_e);
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compile_get_attr(line_rasterizer_e);
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compile_get_attr(colorizer_mode);
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compile_get_attr(double);
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compile_get_value(int);
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compile_get_value(double);
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compile_get_value(expression_ptr);
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} //ns mapnik
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