Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2009-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@101: // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
Chris@16: 
Chris@16: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@16: // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_IO_SVG_WRITE_SVG_HPP
Chris@16: #define BOOST_GEOMETRY_IO_SVG_WRITE_SVG_HPP
Chris@16: 
Chris@16: #include <ostream>
Chris@16: #include <string>
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/mpl/assert.hpp>
Chris@16: #include <boost/range.hpp>
Chris@16: 
Chris@101: #include <boost/geometry/algorithms/detail/interior_iterator.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/core/exterior_ring.hpp>
Chris@16: #include <boost/geometry/core/interior_rings.hpp>
Chris@16: #include <boost/geometry/core/ring_type.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/geometries/concepts/check.hpp>
Chris@16: 
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DETAIL
Chris@16: namespace detail { namespace svg
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: template <typename Point>
Chris@16: struct svg_point
Chris@16: {
Chris@16:     template <typename Char, typename Traits>
Chris@16:     static inline void apply(std::basic_ostream<Char, Traits>& os,
Chris@16:                 Point const& p, std::string const& style, int size)
Chris@16:     {
Chris@16:         os << "<circle cx=\"" << geometry::get<0>(p)
Chris@16:             << "\" cy=\"" << geometry::get<1>(p)
Chris@16:             << "\" r=\"" << (size < 0 ? 5 : size)
Chris@16:             << "\" style=\"" << style << "\"/>";
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename Box>
Chris@16: struct svg_box
Chris@16: {
Chris@16:     template <typename Char, typename Traits>
Chris@16:     static inline void apply(std::basic_ostream<Char, Traits>& os,
Chris@16:                 Box const& box, std::string const& style, int )
Chris@16:     {
Chris@16:         // Prevent invisible boxes, making them >=1, using "max"
Chris@16:         BOOST_USING_STD_MAX();
Chris@16: 
Chris@16:         typedef typename coordinate_type<Box>::type ct;
Chris@16:         ct x = geometry::get<geometry::min_corner, 0>(box);
Chris@16:         ct y = geometry::get<geometry::min_corner, 1>(box);
Chris@16:         ct width = max BOOST_PREVENT_MACRO_SUBSTITUTION(1,
Chris@16:                     geometry::get<geometry::max_corner, 0>(box) - x);
Chris@16:         ct height = max BOOST_PREVENT_MACRO_SUBSTITUTION (1,
Chris@16:                     geometry::get<geometry::max_corner, 1>(box) - y);
Chris@16: 
Chris@16:         os << "<rect x=\"" << x << "\" y=\"" << y
Chris@16:            << "\" width=\"" << width << "\" height=\"" << height
Chris@16:            << "\" style=\"" << style << "\"/>";
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief Stream ranges as SVG
Chris@16: \note policy is used to select type (polyline/polygon)
Chris@16: */
Chris@16: template <typename Range, typename Policy>
Chris@16: struct svg_range
Chris@16: {
Chris@16:     template <typename Char, typename Traits>
Chris@16:     static inline void apply(std::basic_ostream<Char, Traits>& os,
Chris@16:         Range const& range, std::string const& style, int )
Chris@16:     {
Chris@16:         typedef typename boost::range_iterator<Range const>::type iterator;
Chris@16: 
Chris@16:         bool first = true;
Chris@16: 
Chris@16:         os << "<" << Policy::prefix() << " points=\"";
Chris@16: 
Chris@16:         for (iterator it = boost::begin(range);
Chris@16:             it != boost::end(range);
Chris@16:             ++it, first = false)
Chris@16:         {
Chris@16:             os << (first ? "" : " " )
Chris@16:                 << geometry::get<0>(*it)
Chris@16:                 << ","
Chris@16:                 << geometry::get<1>(*it);
Chris@16:         }
Chris@16:         os << "\" style=\"" << style << Policy::style() << "\"/>";
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: template <typename Polygon>
Chris@16: struct svg_poly
Chris@16: {
Chris@16:     template <typename Char, typename Traits>
Chris@16:     static inline void apply(std::basic_ostream<Char, Traits>& os,
Chris@16:         Polygon const& polygon, std::string const& style, int )
Chris@16:     {
Chris@16:         typedef typename geometry::ring_type<Polygon>::type ring_type;
Chris@16:         typedef typename boost::range_iterator<ring_type const>::type iterator_type;
Chris@16: 
Chris@16:         bool first = true;
Chris@16:         os << "<g fill-rule=\"evenodd\"><path d=\"";
Chris@16: 
Chris@16:         ring_type const& ring = geometry::exterior_ring(polygon);
Chris@16:         for (iterator_type it = boost::begin(ring);
Chris@16:             it != boost::end(ring);
Chris@16:             ++it, first = false)
Chris@16:         {
Chris@16:             os << (first ? "M" : " L") << " "
Chris@16:                 << geometry::get<0>(*it)
Chris@16:                 << ","
Chris@16:                 << geometry::get<1>(*it);
Chris@16:         }
Chris@16: 
Chris@16:         // Inner rings:
Chris@16:         {
Chris@101:             typename interior_return_type<Polygon const>::type
Chris@101:                 rings = interior_rings(polygon);
Chris@101:             for (typename detail::interior_iterator<Polygon const>::type
Chris@101:                     rit = boost::begin(rings); rit != boost::end(rings); ++rit)
Chris@16:             {
Chris@16:                 first = true;
Chris@101:                 for (typename detail::interior_ring_iterator<Polygon const>::type
Chris@101:                         it = boost::begin(*rit); it != boost::end(*rit);
Chris@16:                     ++it, first = false)
Chris@16:                 {
Chris@16:                     os << (first ? "M" : " L") << " "
Chris@16:                         << geometry::get<0>(*it)
Chris@16:                         << ","
Chris@16:                         << geometry::get<1>(*it);
Chris@16:                 }
Chris@16:             }
Chris@16:         }
Chris@16:         os << " z \" style=\"" << style << "\"/></g>";
Chris@16: 
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: struct prefix_linestring
Chris@16: {
Chris@16:     static inline const char* prefix() { return "polyline"; }
Chris@16:     static inline const char* style() { return ";fill:none"; }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: struct prefix_ring
Chris@16: {
Chris@16:     static inline const char* prefix() { return "polygon"; }
Chris@16:     static inline const char* style() { return ""; }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: }} // namespace detail::svg
Chris@16: #endif // DOXYGEN_NO_DETAIL
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DISPATCH
Chris@16: namespace dispatch
Chris@16: {
Chris@16: 
Chris@16: /*!
Chris@16: \brief Dispatching base struct for SVG streaming, specialized below per geometry type
Chris@16: \details Specializations should implement a static method "stream" to stream a geometry
Chris@16: The static method should have the signature:
Chris@16: 
Chris@16: template <typename Char, typename Traits>
Chris@16: static inline void apply(std::basic_ostream<Char, Traits>& os, G const& geometry)
Chris@16: */
Chris@16: template <typename GeometryTag, typename Geometry>
Chris@16: struct svg
Chris@16: {
Chris@16:     BOOST_MPL_ASSERT_MSG
Chris@16:         (
Chris@16:             false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
Chris@16:             , (Geometry)
Chris@16:         );
Chris@16: };
Chris@16: 
Chris@16: template <typename Point>
Chris@16: struct svg<point_tag, Point> : detail::svg::svg_point<Point> {};
Chris@16: 
Chris@16: template <typename Box>
Chris@16: struct svg<box_tag, Box> : detail::svg::svg_box<Box> {};
Chris@16: 
Chris@16: template <typename Linestring>
Chris@16: struct svg<linestring_tag, Linestring>
Chris@16:     : detail::svg::svg_range<Linestring, detail::svg::prefix_linestring> {};
Chris@16: 
Chris@16: template <typename Ring>
Chris@16: struct svg<ring_tag, Ring>
Chris@16:     : detail::svg::svg_range<Ring, detail::svg::prefix_ring> {};
Chris@16: 
Chris@16: template <typename Polygon>
Chris@16: struct svg<polygon_tag, Polygon>
Chris@16:     : detail::svg::svg_poly<Polygon> {};
Chris@16: 
Chris@16: } // namespace dispatch
Chris@16: #endif // DOXYGEN_NO_DISPATCH
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief Generic geometry template manipulator class, takes corresponding output class from traits class
Chris@16: \ingroup svg
Chris@16: \details Stream manipulator, streams geometry classes as SVG (Scalable Vector Graphics)
Chris@16: */
Chris@16: template <typename G>
Chris@16: class svg_manipulator
Chris@16: {
Chris@16: public:
Chris@16: 
Chris@16:     inline svg_manipulator(G const& g, std::string const& style, int size)
Chris@16:         : m_geometry(g)
Chris@16:         , m_style(style)
Chris@16:         , m_size(size)
Chris@16:     {}
Chris@16: 
Chris@16:     template <typename Char, typename Traits>
Chris@16:     inline friend std::basic_ostream<Char, Traits>& operator<<(
Chris@16:                     std::basic_ostream<Char, Traits>& os, svg_manipulator const& m)
Chris@16:     {
Chris@16:         dispatch::svg
Chris@16:             <
Chris@16:                 typename tag<G>::type, G
Chris@16:             >::apply(os, m.m_geometry, m.m_style, m.m_size);
Chris@16:         os.flush();
Chris@16:         return os;
Chris@16:     }
Chris@16: 
Chris@16: private:
Chris@16:     G const& m_geometry;
Chris@16:     std::string const& m_style;
Chris@16:     int m_size;
Chris@16: };
Chris@16: 
Chris@16: /*!
Chris@16: \brief Manipulator to stream geometries as SVG
Chris@16: \tparam Geometry \tparam_geometry
Chris@16: \param geometry \param_geometry
Chris@16: \param style String containing verbatim SVG style information
Chris@16: \param size Optional size (used for SVG points) in SVG pixels. For linestrings,
Chris@16:     specify linewidth in the SVG style information
Chris@16: \ingroup svg
Chris@16: */
Chris@16: template <typename Geometry>
Chris@16: inline svg_manipulator<Geometry> svg(Geometry const& geometry, std::string const& style, int size = -1)
Chris@16: {
Chris@16:     concept::check<Geometry const>();
Chris@16: 
Chris@16:     return svg_manipulator<Geometry>(geometry, style, size);
Chris@16: }
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_IO_SVG_WRITE_SVG_HPP