sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add extract_bounding_boxes_x3 parser configuration

Browse source
This commit is contained in:
artemp 2016-11-25 16:49:42 +01:00
parent 00b2bf013a
commit 8a436c8cdc
1 changed files with 92 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

92
include/mapnik/json/extract_bounding_boxes_x3_config.hpp Normal file
View file

@ -0,0 +1,92 @@
/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2016 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_JSON_EXTRACT_BOUNDING_BOXES_CONFIG_HPP
#define MAPNIK_JSON_EXTRACT_BOUNDING_BOXES_CONFIG_HPP
#include <mapnik/json/json_grammar_config.hpp>
#include <mapnik/box2d.hpp>
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#include <boost/spirit/home/x3.hpp>
#pragma GCC diagnostic pop
//auto feature_collection_impl = x3::with<mapnik::json::grammar::bracket_tag>(std::ref(bracket_counter))
// [x3::with<mapnik::json::grammar::keys_tag>(std::ref(keys))
// [x3::with<mapnik::json::grammar::feature_callback_tag>(std::ref(callback))
// [mapnik::json::grammar::feature_collection]
// ]];
namespace mapnik { namespace json {
template <typename Iterator, typename Boxes>
struct extract_positions
{
extract_positions(Iterator start, Boxes & boxes)
: start_(start),
boxes_(boxes) {}
template <typename T>
void operator() (T const& val) const
{
auto const& r = std::get<0>(val);
mapnik::box2d<float> const& bbox = std::get<1>(val);
auto offset = std::distance(start_, r.begin());
auto size = std::distance(r.begin(), r.end());
boxes_.emplace_back(std::make_pair(bbox,std::make_pair(offset, size)));
//boxes_.emplace_back(std::make_tuple(bbox,offset, size));
}
Iterator start_;
Boxes & boxes_;
};
using box_type = mapnik::box2d<float>;
using boxes_type = std::vector<std::pair<box_type, std::pair<std::size_t, std::size_t>>>;
using callback_type = extract_positions<grammar::iterator_type, boxes_type>;
namespace grammar {
struct bracket_tag;
struct feature_callback_tag;
namespace x3 = boost::spirit::x3;
using space_type = x3::standard::space_type;
//using iterator_type = char const*;
using phrase_parse_context_type = x3::phrase_parse_context<space_type>::type;
using context_type = x3::with_context<keys_tag,
std::reference_wrapper<keys_map> const,
phrase_parse_context_type>::type;
using extract_bounding_boxes_context_type =
x3::with_context<bracket_tag,
std::reference_wrapper<std::size_t> const,
x3::with_context<feature_callback_tag,
std::reference_wrapper<callback_type> const,
context_type>::type>::type;
}}}
#endif // MAPNIK_JSON_EXTRACT_BOUNDING_BOXES_CONFIG_HPP