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