| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| // Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
| // Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
| // Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
| |
| // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
| // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. |
| |
| // Use, modification and distribution is subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| #ifndef BOOST_GEOMETRY_UTIL_WRITE_DSV_HPP |
| #define BOOST_GEOMETRY_UTIL_WRITE_DSV_HPP |
| |
| |
| #include <cstddef> |
| #include <ostream> |
| #include <string> |
| |
| #include <boost/concept_check.hpp> |
| #include <boost/range.hpp> |
| #include <boost/typeof/typeof.hpp> |
| |
| #include <boost/geometry/core/exterior_ring.hpp> |
| #include <boost/geometry/core/interior_rings.hpp> |
| #include <boost/geometry/core/ring_type.hpp> |
| #include <boost/geometry/core/tag_cast.hpp> |
| |
| #include <boost/geometry/geometries/concepts/check.hpp> |
| |
| |
| namespace boost { namespace geometry |
| { |
| |
| #ifndef DOXYGEN_NO_DETAIL |
| namespace detail { namespace dsv |
| { |
| |
| |
| struct dsv_settings |
| { |
| std::string coordinate_separator; |
| std::string point_open; |
| std::string point_close; |
| std::string point_separator; |
| std::string list_open; |
| std::string list_close; |
| std::string list_separator; |
| |
| dsv_settings(std::string const& sep |
| , std::string const& open |
| , std::string const& close |
| , std::string const& psep |
| , std::string const& lopen |
| , std::string const& lclose |
| , std::string const& lsep |
| ) |
| : coordinate_separator(sep) |
| , point_open(open) |
| , point_close(close) |
| , point_separator(psep) |
| , list_open(lopen) |
| , list_close(lclose) |
| , list_separator(lsep) |
| {} |
| }; |
| |
| /*! |
| \brief Stream coordinate of a point as \ref DSV |
| */ |
| template <typename Point, std::size_t Dimension, std::size_t Count> |
| struct stream_coordinate |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Point const& point, |
| dsv_settings const& settings) |
| { |
| os << (Dimension > 0 ? settings.coordinate_separator : "") |
| << get<Dimension>(point); |
| |
| stream_coordinate |
| < |
| Point, Dimension + 1, Count |
| >::apply(os, point, settings); |
| } |
| }; |
| |
| template <typename Point, std::size_t Count> |
| struct stream_coordinate<Point, Count, Count> |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>&, |
| Point const&, |
| dsv_settings const& ) |
| { |
| } |
| }; |
| |
| |
| /*! |
| \brief Stream indexed coordinate of a box/segment as \ref DSV |
| */ |
| template |
| < |
| typename Geometry, |
| std::size_t Index, |
| std::size_t Dimension, |
| std::size_t Count |
| > |
| struct stream_indexed |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Geometry const& geometry, |
| dsv_settings const& settings) |
| { |
| os << (Dimension > 0 ? settings.coordinate_separator : "") |
| << get<Index, Dimension>(geometry); |
| stream_indexed |
| < |
| Geometry, Index, Dimension + 1, Count |
| >::apply(os, geometry, settings); |
| } |
| }; |
| |
| template <typename Geometry, std::size_t Index, std::size_t Count> |
| struct stream_indexed<Geometry, Index, Count, Count> |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>&, Geometry const&, |
| dsv_settings const& ) |
| { |
| } |
| }; |
| |
| |
| |
| /*! |
| \brief Stream points as \ref DSV |
| */ |
| template <typename Point> |
| struct dsv_point |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Point const& p, |
| dsv_settings const& settings) |
| { |
| os << settings.point_open; |
| stream_coordinate<Point, 0, dimension<Point>::type::value>::apply(os, p, settings); |
| os << settings.point_close; |
| } |
| }; |
| |
| /*! |
| \brief Stream ranges as DSV |
| \note policy is used to stream prefix/postfix, enabling derived classes to override this |
| */ |
| template <typename Range> |
| struct dsv_range |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Range const& range, |
| dsv_settings const& settings) |
| { |
| typedef typename boost::range_iterator<Range const>::type iterator_type; |
| |
| bool first = true; |
| |
| os << settings.list_open; |
| |
| for (iterator_type it = boost::begin(range); |
| it != boost::end(range); |
| ++it) |
| { |
| os << (first ? "" : settings.point_separator) |
| << settings.point_open; |
| |
| stream_coordinate |
| < |
| point_type, 0, dimension<point_type>::type::value |
| >::apply(os, *it, settings); |
| os << settings.point_close; |
| |
| first = false; |
| } |
| |
| os << settings.list_close; |
| } |
| |
| private: |
| typedef typename boost::range_value<Range>::type point_type; |
| }; |
| |
| /*! |
| \brief Stream sequence of points as DSV-part, e.g. (1 2),(3 4) |
| \note Used in polygon, all multi-geometries |
| */ |
| |
| |
| template <typename Polygon> |
| struct dsv_poly |
| { |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Polygon const& poly, |
| dsv_settings const& settings) |
| { |
| typedef typename ring_type<Polygon>::type ring; |
| |
| os << settings.list_open; |
| |
| dsv_range<ring>::apply(os, exterior_ring(poly), settings); |
| |
| typename interior_return_type<Polygon const>::type rings |
| = interior_rings(poly); |
| for (BOOST_AUTO_TPL(it, boost::begin(rings)); it != boost::end(rings); ++it) |
| { |
| os << settings.list_separator; |
| dsv_range<ring>::apply(os, *it, settings); |
| } |
| os << settings.list_close; |
| } |
| }; |
| |
| template <typename Geometry, std::size_t Index> |
| struct dsv_per_index |
| { |
| typedef typename point_type<Geometry>::type point_type; |
| |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Geometry const& geometry, |
| dsv_settings const& settings) |
| { |
| os << settings.point_open; |
| stream_indexed |
| < |
| Geometry, Index, 0, dimension<Geometry>::type::value |
| >::apply(os, geometry, settings); |
| os << settings.point_close; |
| } |
| }; |
| |
| |
| template <typename Geometry> |
| struct dsv_indexed |
| { |
| typedef typename point_type<Geometry>::type point_type; |
| |
| template <typename Char, typename Traits> |
| static inline void apply(std::basic_ostream<Char, Traits>& os, |
| Geometry const& geometry, |
| dsv_settings const& settings) |
| { |
| os << settings.list_open; |
| dsv_per_index<Geometry, 0>::apply(os, geometry, settings); |
| os << settings.point_separator; |
| dsv_per_index<Geometry, 1>::apply(os, geometry, settings); |
| os << settings.list_close; |
| } |
| }; |
| |
| }} // namespace detail::dsv |
| #endif // DOXYGEN_NO_DETAIL |
| |
| |
| #ifndef DOXYGEN_NO_DISPATCH |
| namespace dispatch |
| { |
| |
| template <typename Tag, typename Geometry> |
| struct dsv {}; |
| |
| |
| template <typename Point> |
| struct dsv<point_tag, Point> |
| : detail::dsv::dsv_point<Point> |
| {}; |
| |
| |
| template <typename Linestring> |
| struct dsv<linestring_tag, Linestring> |
| : detail::dsv::dsv_range<Linestring> |
| {}; |
| |
| |
| template <typename Box> |
| struct dsv<box_tag, Box> |
| : detail::dsv::dsv_indexed<Box> |
| {}; |
| |
| template <typename Segment> |
| struct dsv<segment_tag, Segment> |
| : detail::dsv::dsv_indexed<Segment> |
| {}; |
| |
| |
| template <typename Ring> |
| struct dsv<ring_tag, Ring> |
| : detail::dsv::dsv_range<Ring> |
| {}; |
| |
| |
| template <typename Polygon> |
| struct dsv<polygon_tag, Polygon> |
| : detail::dsv::dsv_poly<Polygon> |
| {}; |
| |
| |
| } // namespace dispatch |
| #endif // DOXYGEN_NO_DISPATCH |
| |
| |
| #ifndef DOXYGEN_NO_DETAIL |
| namespace detail { namespace dsv |
| { |
| |
| |
| // FIXME: This class is not copyable/assignable but it is used as such --mloskot |
| template <typename Geometry> |
| class dsv_manipulator |
| { |
| public: |
| |
| inline dsv_manipulator(Geometry const& g, |
| dsv_settings const& settings) |
| : m_geometry(g) |
| , m_settings(settings) |
| {} |
| |
| template <typename Char, typename Traits> |
| inline friend std::basic_ostream<Char, Traits>& operator<<( |
| std::basic_ostream<Char, Traits>& os, |
| dsv_manipulator const& m) |
| { |
| dispatch::dsv |
| < |
| typename tag_cast |
| < |
| typename tag<Geometry>::type, |
| multi_tag |
| >::type, |
| Geometry |
| >::apply(os, m.m_geometry, m.m_settings); |
| os.flush(); |
| return os; |
| } |
| |
| private: |
| Geometry const& m_geometry; |
| dsv_settings m_settings; |
| }; |
| |
| |
| }} // namespace detail::dsv |
| #endif // DOXYGEN_NO_DETAIL |
| |
| |
| /*! |
| \brief Main DSV-streaming function |
| \details DSV stands for Delimiter Separated Values. Geometries can be streamed |
| as DSV. There are defaults for all separators. |
| \note Useful for examples and testing purposes |
| \note With this function GeoJSON objects can be created, using the right |
| delimiters |
| \ingroup utility |
| */ |
| template <typename Geometry> |
| inline detail::dsv::dsv_manipulator<Geometry> dsv(Geometry const& geometry |
| , std::string const& coordinate_separator = ", " |
| , std::string const& point_open = "(" |
| , std::string const& point_close = ")" |
| , std::string const& point_separator = ", " |
| , std::string const& list_open = "(" |
| , std::string const& list_close = ")" |
| , std::string const& list_separator = ", " |
| ) |
| { |
| concept::check<Geometry const>(); |
| |
| return detail::dsv::dsv_manipulator<Geometry>(geometry, |
| detail::dsv::dsv_settings(coordinate_separator, |
| point_open, point_close, point_separator, |
| list_open, list_close, list_separator)); |
| } |
| |
| |
| }} // namespace boost::geometry |
| |
| |
| #endif // BOOST_GEOMETRY_UTIL_WRITE_DSV_HPP |