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283 lines
7.3 KiB
C++
283 lines
7.3 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) 2015 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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#ifndef MAPNIK_GEOMETRY_IS_VALID_HPP
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#define MAPNIK_GEOMETRY_IS_VALID_HPP
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#include <boost/version.hpp>
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// only Boost >= 1.58 contains the is_valid function
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#if BOOST_VERSION >= 105800
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#include <mapnik/geometry.hpp>
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#include <mapnik/geometry_adapters.hpp>
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#include <boost/geometry/algorithms/is_valid.hpp>
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#include <boost/geometry/algorithms/validity_failure_type.hpp>
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namespace mapnik { namespace geometry {
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namespace detail {
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struct geometry_is_valid
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{
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using result_type = bool;
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template <typename T>
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result_type operator() (geometry<T> const& geom) const
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{
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return mapnik::util::apply_visitor(*this, geom);
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}
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result_type operator() (geometry_empty const& ) const
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{
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return true;
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}
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template <typename T>
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result_type operator() (geometry_collection<T> const& collection) const
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{
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for (auto const& geom : collection)
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{
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if ( !(*this)(geom)) return false;
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}
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return true;
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}
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template <typename T>
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result_type operator() (point<T> const& pt) const
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{
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return boost::geometry::is_valid(pt);
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}
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template <typename T>
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result_type operator() (line_string<T> const& line) const
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{
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return boost::geometry::is_valid(line);
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}
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template <typename T>
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result_type operator() (polygon<T> const& poly) const
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{
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return boost::geometry::is_valid(poly);
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}
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template <typename T>
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result_type operator() (multi_point<T> const& multi_pt) const
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{
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return boost::geometry::is_valid(multi_pt);
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}
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template <typename T>
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result_type operator() (multi_line_string<T> const& multi_line) const
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{
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return boost::geometry::is_valid(multi_line);
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}
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template <typename T>
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result_type operator() (multi_polygon<T> const& multi_poly) const
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{
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return boost::geometry::is_valid(multi_poly);
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}
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};
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struct geometry_is_valid_reason
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{
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using result_type = bool;
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boost::geometry::validity_failure_type & failure_;
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geometry_is_valid_reason(boost::geometry::validity_failure_type & failure):
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failure_(failure) {}
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template <typename T>
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result_type operator() (geometry<T> const& geom) const
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{
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return mapnik::util::apply_visitor(*this, geom);
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}
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result_type operator() (geometry_empty const& ) const
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{
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failure_ = boost::geometry::no_failure;
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return true;
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}
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template <typename T>
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result_type operator() (geometry_collection<T> const& collection) const
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{
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for (auto const& geom : collection)
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{
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if ( !(*this)(geom)) return false;
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}
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return true;
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}
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template <typename T>
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result_type operator() (point<T> const& pt) const
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{
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return boost::geometry::is_valid(pt, failure_);
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}
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template <typename T>
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result_type operator() (line_string<T> const& line) const
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{
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return boost::geometry::is_valid(line, failure_);
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}
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template <typename T>
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result_type operator() (polygon<T> const& poly) const
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{
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return boost::geometry::is_valid(poly, failure_);
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}
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template <typename T>
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result_type operator() (multi_point<T> const& multi_pt) const
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{
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return boost::geometry::is_valid(multi_pt, failure_);
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}
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template <typename T>
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result_type operator() (multi_line_string<T> const& multi_line) const
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{
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return boost::geometry::is_valid(multi_line, failure_);
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}
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template <typename T>
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result_type operator() (multi_polygon<T> const& multi_poly) const
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{
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return boost::geometry::is_valid(multi_poly, failure_);
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}
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};
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struct geometry_is_valid_string
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{
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using result_type = bool;
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std::string & message_;
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geometry_is_valid_string(std::string & message):
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message_(message) {}
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template <typename T>
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result_type operator() (geometry<T> const& geom) const
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{
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return mapnik::util::apply_visitor(*this, geom);
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}
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result_type operator() (geometry_empty const& ) const
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{
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message_ = "Geometry is valid";
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return true;
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}
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template <typename T>
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result_type operator() (geometry_collection<T> const& collection) const
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{
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for (auto const& geom : collection)
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{
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if ( !(*this)(geom)) return false;
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}
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return true;
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}
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template <typename T>
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result_type operator() (point<T> const& pt) const
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{
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return boost::geometry::is_valid(pt, message_);
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}
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template <typename T>
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result_type operator() (line_string<T> const& line) const
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{
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return boost::geometry::is_valid(line, message_);
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}
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template <typename T>
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result_type operator() (polygon<T> const& poly) const
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{
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return boost::geometry::is_valid(poly, message_);
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}
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template <typename T>
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result_type operator() (multi_point<T> const& multi_pt) const
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{
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return boost::geometry::is_valid(multi_pt, message_);
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}
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template <typename T>
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result_type operator() (multi_line_string<T> const& multi_line) const
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{
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return boost::geometry::is_valid(multi_line, message_);
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}
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template <typename T>
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result_type operator() (multi_polygon<T> const& multi_poly) const
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{
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return boost::geometry::is_valid(multi_poly, message_);
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}
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};
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}
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template <typename T>
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inline bool is_valid(T const& geom)
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{
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return detail::geometry_is_valid() (geom);
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}
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template <typename T>
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inline bool is_valid(mapnik::geometry::geometry<T> const& geom)
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{
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return util::apply_visitor(detail::geometry_is_valid(), geom);
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}
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template <typename T>
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inline bool is_valid(T const& geom, boost::geometry::validity_failure_type & failure)
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{
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return detail::geometry_is_valid_reason(failure) (geom);
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}
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template <typename T>
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inline bool is_valid(mapnik::geometry::geometry<T> const& geom,
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boost::geometry::validity_failure_type & failure)
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{
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return util::apply_visitor(detail::geometry_is_valid_reason(failure), geom);
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}
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template <typename T>
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inline bool is_valid(T const& geom, std::string & message)
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{
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return detail::geometry_is_valid_string(message) (geom);
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}
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template <typename T>
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inline bool is_valid(mapnik::geometry::geometry<T> const& geom,
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std::string & message)
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{
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return util::apply_visitor(detail::geometry_is_valid_string(message), geom);
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}
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}}
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#endif // BOOST_VERSION >= 1.58
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#endif // MAPNIK_GEOMETRY_IS_VALID_HPP
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