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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. | |
5 | // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. | |
6 | ||
7 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library | |
8 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
9 | ||
10 | // Use, modification and distribution is subject to the Boost Software License, | |
11 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
12 | // http://www.boost.org/LICENSE_1_0.txt) | |
13 | ||
14 | #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP | |
15 | #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP | |
16 | ||
17 | ||
18 | #include <boost/mpl/assert.hpp> | |
19 | #include <boost/concept/requires.hpp> | |
20 | #include <boost/range.hpp> | |
21 | #include <boost/type_traits/is_const.hpp> | |
22 | #include <boost/type_traits/remove_const.hpp> | |
23 | ||
24 | #include <boost/geometry/core/tag.hpp> | |
25 | #include <boost/geometry/core/tag_cast.hpp> | |
26 | #include <boost/geometry/core/tags.hpp> | |
27 | ||
28 | #include <boost/geometry/util/add_const_if_c.hpp> | |
29 | #include <boost/geometry/views/box_view.hpp> | |
30 | ||
31 | ||
32 | namespace boost { namespace geometry | |
33 | { | |
34 | ||
35 | ||
36 | #ifndef DOXYGEN_NO_DETAIL | |
37 | namespace detail { namespace for_each | |
38 | { | |
39 | ||
40 | ||
41 | template <typename Range, typename Actor> | |
42 | struct fe_range_range | |
43 | { | |
44 | static inline void apply(Range & range, Actor & actor) | |
45 | { | |
46 | actor.apply(range); | |
47 | } | |
48 | }; | |
49 | ||
50 | ||
51 | template <typename Polygon, typename Actor> | |
52 | struct fe_range_polygon | |
53 | { | |
54 | static inline void apply(Polygon & polygon, Actor & actor) | |
55 | { | |
56 | actor.apply(exterior_ring(polygon)); | |
57 | ||
58 | // TODO: If some flag says true, also do the inner rings. | |
59 | // for convex hull, it's not necessary | |
60 | } | |
61 | }; | |
62 | ||
63 | template <typename Box, typename Actor> | |
64 | struct fe_range_box | |
65 | { | |
66 | static inline void apply(Box & box, Actor & actor) | |
67 | { | |
68 | actor.apply(box_view<typename boost::remove_const<Box>::type>(box)); | |
69 | } | |
70 | }; | |
71 | ||
72 | template <typename Multi, typename Actor, typename SinglePolicy> | |
73 | struct fe_range_multi | |
74 | { | |
75 | static inline void apply(Multi & multi, Actor & actor) | |
76 | { | |
77 | for ( typename boost::range_iterator<Multi>::type | |
78 | it = boost::begin(multi); it != boost::end(multi); ++it) | |
79 | { | |
80 | SinglePolicy::apply(*it, actor); | |
81 | } | |
82 | } | |
83 | }; | |
84 | ||
85 | }} // namespace detail::for_each | |
86 | #endif // DOXYGEN_NO_DETAIL | |
87 | ||
88 | ||
89 | #ifndef DOXYGEN_NO_DISPATCH | |
90 | namespace dispatch | |
91 | { | |
92 | ||
93 | ||
94 | template | |
95 | < | |
96 | typename Geometry, | |
97 | typename Actor, | |
98 | typename Tag = typename tag<Geometry>::type | |
99 | > | |
100 | struct for_each_range | |
101 | { | |
102 | BOOST_MPL_ASSERT_MSG | |
103 | ( | |
104 | false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE | |
105 | , (types<Geometry>) | |
106 | ); | |
107 | }; | |
108 | ||
109 | ||
110 | template <typename Linestring, typename Actor> | |
111 | struct for_each_range<Linestring, Actor, linestring_tag> | |
112 | : detail::for_each::fe_range_range<Linestring, Actor> | |
113 | {}; | |
114 | ||
115 | ||
116 | template <typename Ring, typename Actor> | |
117 | struct for_each_range<Ring, Actor, ring_tag> | |
118 | : detail::for_each::fe_range_range<Ring, Actor> | |
119 | {}; | |
120 | ||
121 | ||
122 | template <typename Polygon, typename Actor> | |
123 | struct for_each_range<Polygon, Actor, polygon_tag> | |
124 | : detail::for_each::fe_range_polygon<Polygon, Actor> | |
125 | {}; | |
126 | ||
127 | ||
128 | template <typename Box, typename Actor> | |
129 | struct for_each_range<Box, Actor, box_tag> | |
130 | : detail::for_each::fe_range_box<Box, Actor> | |
131 | {}; | |
132 | ||
133 | ||
134 | template <typename MultiPoint, typename Actor> | |
135 | struct for_each_range<MultiPoint, Actor, multi_point_tag> | |
136 | : detail::for_each::fe_range_range<MultiPoint, Actor> | |
137 | {}; | |
138 | ||
139 | ||
140 | template <typename Geometry, typename Actor> | |
141 | struct for_each_range<Geometry, Actor, multi_linestring_tag> | |
142 | : detail::for_each::fe_range_multi | |
143 | < | |
144 | Geometry, | |
145 | Actor, | |
146 | detail::for_each::fe_range_range | |
147 | < | |
148 | typename add_const_if_c | |
149 | < | |
150 | boost::is_const<Geometry>::value, | |
151 | typename boost::range_value<Geometry>::type | |
152 | >::type, | |
153 | Actor | |
154 | > | |
155 | > | |
156 | {}; | |
157 | ||
158 | ||
159 | template <typename Geometry, typename Actor> | |
160 | struct for_each_range<Geometry, Actor, multi_polygon_tag> | |
161 | : detail::for_each::fe_range_multi | |
162 | < | |
163 | Geometry, | |
164 | Actor, | |
165 | detail::for_each::fe_range_polygon | |
166 | < | |
167 | typename add_const_if_c | |
168 | < | |
169 | boost::is_const<Geometry>::value, | |
170 | typename boost::range_value<Geometry>::type | |
171 | >::type, | |
172 | Actor | |
173 | > | |
174 | > | |
175 | {}; | |
176 | ||
177 | ||
178 | } // namespace dispatch | |
179 | #endif // DOXYGEN_NO_DISPATCH | |
180 | ||
181 | namespace detail | |
182 | { | |
183 | ||
184 | template <typename Geometry, typename Actor> | |
185 | inline void for_each_range(Geometry const& geometry, Actor & actor) | |
186 | { | |
187 | dispatch::for_each_range | |
188 | < | |
189 | Geometry const, | |
190 | Actor | |
191 | >::apply(geometry, actor); | |
192 | } | |
193 | ||
194 | ||
195 | } | |
196 | ||
197 | ||
198 | }} // namespace boost::geometry | |
199 | ||
200 | ||
201 | #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP |