Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2009-2012 Barend Gehrels, Amsterdam, the Netherlands.
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_MAPPER_HPP
Chris@16: #define BOOST_GEOMETRY_IO_SVG_MAPPER_HPP
Chris@16: 
Chris@16: #include <cstdio>
Chris@16: 
Chris@16: #include <vector>
Chris@16: 
Chris@16: #include <boost/mpl/assert.hpp>
Chris@16: #include <boost/noncopyable.hpp>
Chris@16: #include <boost/scoped_ptr.hpp>
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: #include <boost/type_traits/remove_const.hpp>
Chris@16: 
Chris@16: #include <boost/algorithm/string/split.hpp>
Chris@16: #include <boost/algorithm/string/classification.hpp>
Chris@16: 
Chris@16: 
Chris@16: #include <boost/geometry/core/tags.hpp>
Chris@16: #include <boost/geometry/core/tag_cast.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/algorithms/envelope.hpp>
Chris@16: #include <boost/geometry/algorithms/expand.hpp>
Chris@16: #include <boost/geometry/algorithms/transform.hpp>
Chris@16: #include <boost/geometry/algorithms/num_points.hpp>
Chris@16: #include <boost/geometry/strategies/transform.hpp>
Chris@16: #include <boost/geometry/strategies/transform/map_transformer.hpp>
Chris@16: #include <boost/geometry/views/segment_view.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/multi/algorithms/envelope.hpp>
Chris@16: #include <boost/geometry/multi/algorithms/num_points.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/io/svg/write_svg.hpp>
Chris@16: 
Chris@16: // Helper geometries (all points are transformed to integer-points)
Chris@16: #include <boost/geometry/geometries/geometries.hpp>
Chris@16: 
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DETAIL
Chris@16: namespace detail { namespace svg
Chris@16: {
Chris@16:     typedef model::point<int, 2, cs::cartesian> svg_point_type;
Chris@16: }}
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DISPATCH
Chris@16: namespace dispatch
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: template <typename GeometryTag, typename Geometry>
Chris@16: struct svg_map
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: 
Chris@16: template <typename Point>
Chris@16: struct svg_map<point_tag, Point>
Chris@16: {
Chris@16:     template <typename TransformStrategy>
Chris@16:     static inline void apply(std::ostream& stream,
Chris@16:                     std::string const& style, int size,
Chris@16:                     Point const& point, TransformStrategy const& strategy)
Chris@16:     {
Chris@16:         detail::svg::svg_point_type ipoint;
Chris@16:         geometry::transform(point, ipoint, strategy);
Chris@16:         stream << geometry::svg(ipoint, style, size) << std::endl;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template <typename Box>
Chris@16: struct svg_map<box_tag, Box>
Chris@16: {
Chris@16:     template <typename TransformStrategy>
Chris@16:     static inline void apply(std::ostream& stream,
Chris@16:                     std::string const& style, int size,
Chris@16:                     Box const& box, TransformStrategy const& strategy)
Chris@16:     {
Chris@16:         model::box<detail::svg::svg_point_type> ibox;
Chris@16:         geometry::transform(box, ibox, strategy);
Chris@16: 
Chris@16:         stream << geometry::svg(ibox, style, size) << std::endl;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename Range1, typename Range2>
Chris@16: struct svg_map_range
Chris@16: {
Chris@16:     template <typename TransformStrategy>
Chris@16:     static inline void apply(std::ostream& stream,
Chris@16:                 std::string const& style, int size,
Chris@16:                 Range1 const& range, TransformStrategy const& strategy)
Chris@16:     {
Chris@16:         Range2 irange;
Chris@16:         geometry::transform(range, irange, strategy);
Chris@16:         stream << geometry::svg(irange, style, size) << std::endl;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template <typename Segment>
Chris@16: struct svg_map<segment_tag, Segment>
Chris@16: {
Chris@16:     template <typename TransformStrategy>
Chris@16:     static inline void apply(std::ostream& stream,
Chris@16:                     std::string const& style, int size,
Chris@16:                     Segment const& segment, TransformStrategy const& strategy)
Chris@16:     {
Chris@16:         typedef segment_view<Segment> view_type;
Chris@16:         view_type range(segment);
Chris@16:         svg_map_range
Chris@16:             <
Chris@16:                 view_type,
Chris@16:                 model::linestring<detail::svg::svg_point_type>
Chris@16:             >::apply(stream, style, size, range, strategy);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename Ring>
Chris@16: struct svg_map<ring_tag, Ring>
Chris@16:     : svg_map_range<Ring, model::ring<detail::svg::svg_point_type> >
Chris@16: {};
Chris@16: 
Chris@16: 
Chris@16: template <typename Linestring>
Chris@16: struct svg_map<linestring_tag, Linestring>
Chris@16:     : svg_map_range<Linestring, model::linestring<detail::svg::svg_point_type> >
Chris@16: {};
Chris@16: 
Chris@16: 
Chris@16: template <typename Polygon>
Chris@16: struct svg_map<polygon_tag, Polygon>
Chris@16: {
Chris@16:     template <typename TransformStrategy>
Chris@16:     static inline void apply(std::ostream& stream,
Chris@16:                     std::string const& style, int size,
Chris@16:                     Polygon const& polygon, TransformStrategy const& strategy)
Chris@16:     {
Chris@16:         model::polygon<detail::svg::svg_point_type> ipoly;
Chris@16:         geometry::transform(polygon, ipoly, strategy);
Chris@16:         stream << geometry::svg(ipoly, style, size) << std::endl;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename Multi>
Chris@16: struct svg_map<multi_tag, Multi>
Chris@16: {
Chris@16:     typedef typename single_tag_of
Chris@16:       <
Chris@16:           typename geometry::tag<Multi>::type
Chris@16:       >::type stag;
Chris@16: 
Chris@16:     template <typename TransformStrategy>
Chris@16:     static inline void apply(std::ostream& stream,
Chris@16:                     std::string const& style, int size,
Chris@16:                     Multi const& multi, TransformStrategy const& strategy)
Chris@16:     {
Chris@16:         for (typename boost::range_iterator<Multi const>::type it
Chris@16:             = boost::begin(multi);
Chris@16:             it != boost::end(multi);
Chris@16:             ++it)
Chris@16:         {
Chris@16:             svg_map
Chris@16:                 <
Chris@16:                     stag,
Chris@16:                     typename boost::range_value<Multi>::type
Chris@16:                 >::apply(stream, style, size, *it, strategy);
Chris@16:         }
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: } // namespace dispatch
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: template <typename Geometry, typename TransformStrategy>
Chris@16: inline void svg_map(std::ostream& stream,
Chris@16:             std::string const& style, int size,
Chris@16:             Geometry const& geometry, TransformStrategy const& strategy)
Chris@16: {
Chris@16:     dispatch::svg_map
Chris@16:         <
Chris@16:             typename tag_cast
Chris@16:                 <
Chris@16:                     typename tag<Geometry>::type,
Chris@16:                     multi_tag
Chris@16:                 >::type,
Chris@16:             typename boost::remove_const<Geometry>::type
Chris@16:         >::apply(stream, style, size, geometry, strategy);
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief Helper class to create SVG maps
Chris@16: \tparam Point Point type, for input geometries.
Chris@16: \tparam SameScale Boolean flag indicating if horizontal and vertical scale should
Chris@16:     be the same. The default value is true
Chris@16: \ingroup svg
Chris@16: 
Chris@16: \qbk{[include reference/io/svg.qbk]}
Chris@16: */
Chris@16: template <typename Point, bool SameScale = true>
Chris@16: class svg_mapper : boost::noncopyable
Chris@16: {
Chris@16:     typedef typename geometry::select_most_precise
Chris@16:         <
Chris@16:             typename coordinate_type<Point>::type,
Chris@16:             double
Chris@16:         >::type calculation_type;
Chris@16: 
Chris@16:     typedef strategy::transform::map_transformer
Chris@16:         <
Chris@16:             calculation_type,
Chris@16:             geometry::dimension<Point>::type::value,
Chris@16:             geometry::dimension<Point>::type::value,
Chris@16:             true,
Chris@16:             SameScale
Chris@16:         > transformer_type;
Chris@16: 
Chris@16:     model::box<Point> m_bounding_box;
Chris@16:     boost::scoped_ptr<transformer_type> m_matrix;
Chris@16:     std::ostream& m_stream;
Chris@16:     int m_width, m_height;
Chris@16:     std::string m_width_height; // for <svg> tag only, defaults to 2x 100%
Chris@16: 
Chris@16:     void init_matrix()
Chris@16:     {
Chris@16:         if (! m_matrix)
Chris@16:         {
Chris@16:             m_matrix.reset(new transformer_type(m_bounding_box,
Chris@16:                             m_width, m_height));
Chris@16: 
Chris@16: 
Chris@16:             m_stream << "<?xml version=\"1.0\" standalone=\"no\"?>"
Chris@16:                 << std::endl
Chris@16:                 << "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\""
Chris@16:                 << std::endl
Chris@16:                 << "\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">"
Chris@16:                 << std::endl
Chris@16:                 << "<svg " << m_width_height << " version=\"1.1\""
Chris@16:                 << std::endl
Chris@16:                 << "xmlns=\"http://www.w3.org/2000/svg\""
Chris@16:                 << std::endl
Chris@16:                 << "xmlns:xlink=\"http://www.w3.org/1999/xlink\""
Chris@16:                 << ">"
Chris@16:                 << std::endl;
Chris@16:         }
Chris@16:     }
Chris@16: 
Chris@16: public :
Chris@16:     
Chris@16:     /*!
Chris@16:     \brief Constructor, initializing the SVG map. Opens and initializes the SVG. 
Chris@16:          Should be called explicitly.
Chris@16:     \param stream Output stream, should be a stream already open
Chris@16:     \param width Width of the SVG map (in SVG pixels)
Chris@16:     \param height Height of the SVG map (in SVG pixels)
Chris@16:     \param width_height Optional information to increase width and/or height
Chris@16:     */
Chris@16:     explicit svg_mapper(std::ostream& stream, int width, int height
Chris@16:         , std::string const& width_height = "width=\"100%\" height=\"100%\"")
Chris@16:         : m_stream(stream)
Chris@16:         , m_width(width)
Chris@16:         , m_height(height)
Chris@16:         , m_width_height(width_height)
Chris@16:     {
Chris@16:         assign_inverse(m_bounding_box);
Chris@16:     }
Chris@16: 
Chris@16:     /*!
Chris@16:     \brief Destructor, called automatically. Closes the SVG by streaming <\/svg>
Chris@16:     */
Chris@16:     virtual ~svg_mapper()
Chris@16:     {
Chris@16:         m_stream << "</svg>" << std::endl;
Chris@16:     }
Chris@16: 
Chris@16:     /*!
Chris@16:     \brief Adds a geometry to the transformation matrix. After doing this,
Chris@16:         the specified geometry can be mapped fully into the SVG map
Chris@16:     \tparam Geometry \tparam_geometry
Chris@16:     \param geometry \param_geometry
Chris@16:     */
Chris@16:     template <typename Geometry>
Chris@16:     void add(Geometry const& geometry)
Chris@16:     {
Chris@16:         if (num_points(geometry) > 0)
Chris@16:         {
Chris@16:             expand(m_bounding_box,
Chris@16:                 return_envelope
Chris@16:                     <
Chris@16:                         model::box<Point>
Chris@16:                     >(geometry));
Chris@16:         }
Chris@16:     }
Chris@16: 
Chris@16:     /*!
Chris@16:     \brief Maps a geometry into the SVG map using the specified style
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:     */
Chris@16:     template <typename Geometry>
Chris@16:     void map(Geometry const& geometry, std::string const& style,
Chris@16:                 int size = -1)
Chris@16:     {
Chris@16:         init_matrix();
Chris@16:         svg_map(m_stream, style, size, geometry, *m_matrix);
Chris@16:     }
Chris@16: 
Chris@16:     /*!
Chris@16:     \brief Adds a text to the SVG map
Chris@16:     \tparam TextPoint \tparam_point
Chris@16:     \param point Location of the text (in map units)
Chris@16:     \param s The text itself
Chris@16:     \param style String containing verbatim SVG style information, of the text
Chris@16:     \param offset_x Offset in SVG pixels, defaults to 0
Chris@16:     \param offset_y Offset in SVG pixels, defaults to 0
Chris@16:     \param lineheight Line height in SVG pixels, in case the text contains \n
Chris@16:     */
Chris@16:     template <typename TextPoint>
Chris@16:     void text(TextPoint const& point, std::string const& s,
Chris@16:                 std::string const& style,
Chris@16:                 int offset_x = 0, int offset_y = 0, int lineheight = 10)
Chris@16:     {
Chris@16:         init_matrix();
Chris@16:         detail::svg::svg_point_type map_point;
Chris@16:         transform(point, map_point, *m_matrix);
Chris@16:         m_stream
Chris@16:             << "<text style=\"" << style << "\""
Chris@16:             << " x=\"" << get<0>(map_point) + offset_x << "\""
Chris@16:             << " y=\"" << get<1>(map_point) + offset_y << "\""
Chris@16:             << ">";
Chris@16:         if (s.find("\n") == std::string::npos)
Chris@16:         {
Chris@16:              m_stream  << s;
Chris@16:         }
Chris@16:         else
Chris@16:         {
Chris@16:             // Multi-line modus
Chris@16: 
Chris@16:             std::vector<std::string> splitted;
Chris@16:             boost::split(splitted, s, boost::is_any_of("\n"));
Chris@16:             for (std::vector<std::string>::const_iterator it
Chris@16:                 = splitted.begin();
Chris@16:                 it != splitted.end();
Chris@16:                 ++it, offset_y += lineheight)
Chris@16:             {
Chris@16:                  m_stream
Chris@16:                     << "<tspan x=\"" << get<0>(map_point) + offset_x
Chris@16:                     << "\""
Chris@16:                     << " y=\"" << get<1>(map_point) + offset_y
Chris@16:                     << "\""
Chris@16:                     << ">" << *it << "</tspan>";
Chris@16:             }
Chris@16:         }
Chris@16:         m_stream << "</text>" << std::endl;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_IO_SVG_MAPPER_HPP