77 lines
2 KiB
C++
77 lines
2 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2021 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#ifndef MAPNIK_ATTRIBUTE_HPP
|
|
#define MAPNIK_ATTRIBUTE_HPP
|
|
|
|
// mapnik
|
|
#include <mapnik/value/types.hpp>
|
|
#include <mapnik/value.hpp>
|
|
#include <mapnik/util/geometry_to_ds_type.hpp>
|
|
// stl
|
|
#include <string>
|
|
#include <unordered_map>
|
|
|
|
namespace mapnik {
|
|
|
|
struct attribute
|
|
{
|
|
std::string name_;
|
|
explicit attribute(std::string const& _name)
|
|
: name_(_name) {}
|
|
|
|
template <typename V ,typename F>
|
|
V const& value(F const& f) const
|
|
{
|
|
return f.get(name_);
|
|
}
|
|
|
|
std::string const& name() const { return name_;}
|
|
};
|
|
|
|
struct geometry_type_attribute
|
|
{
|
|
template <typename V, typename F>
|
|
V value(F const& f) const
|
|
{
|
|
return static_cast<mapnik::value_integer>(util::to_ds_type(f.get_geometry()));
|
|
}
|
|
};
|
|
|
|
struct global_attribute
|
|
{
|
|
std::string name;
|
|
explicit global_attribute(std::string const& name_)
|
|
: name(name_) {}
|
|
|
|
template <typename V, typename C>
|
|
V const& operator() (C const& ctx)
|
|
{
|
|
return ctx.get(name);
|
|
}
|
|
};
|
|
|
|
using attributes = std::unordered_map<std::string, value>;
|
|
|
|
}
|
|
|
|
#endif // MAPNIK_ATTRIBUTE_HPP
|