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#include <mbgl/style/expression/within.hpp>
#include <mapbox/geojson.hpp>
#include <mapbox/geometry.hpp>
#include <mbgl/style/conversion_impl.hpp>
#include <mbgl/tile/geometry_tile_data.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/geometry_within.hpp>
#include <rapidjson/document.h>
#include <mbgl/style/conversion/json.hpp>
namespace mbgl {
namespace {
class PolygonFeature : public GeometryTileFeature {
public:
const Feature& feature;
mutable optional<GeometryCollection> geometry;
PolygonFeature(const Feature& feature_, const CanonicalTileID& canonical) : feature(feature_) {
geometry = convertGeometry(feature.geometry, canonical);
assert(geometry);
geometry = fixupPolygons(*geometry);
}
FeatureType getType() const override { return FeatureType::Polygon; }
const PropertyMap& getProperties() const override { return feature.properties; }
FeatureIdentifier getID() const override { return feature.id; }
optional<mbgl::Value> getValue(const std::string& /*key*/) const override { return optional<mbgl::Value>(); }
const GeometryCollection& getGeometries() const override {
assert(geometry);
return *geometry;
}
};
bool pointsWithinPolygons(const mbgl::GeometryTileFeature& feature,
const mbgl::CanonicalTileID& canonical,
const mbgl::GeoJSON& geoJson) {
return geoJson.match(
[&feature, &canonical](const mapbox::geometry::geometry<double>& geometrySet) -> bool {
mbgl::Feature f(geometrySet);
PolygonFeature polyFeature(f, CanonicalTileID(0, 0, 0));
auto refinedGeoSet = convertGeometry(polyFeature, CanonicalTileID(0, 0, 0));
return refinedGeoSet.match(
[&feature, &canonical](const mapbox::geometry::multi_polygon<double>& polygons) -> bool {
return convertGeometry(feature, canonical)
.match(
[&polygons](const mapbox::geometry::point<double>& point) -> bool {
return pointWithinPolygons(point, polygons);
},
[&polygons](const mapbox::geometry::multi_point<double>& points) -> bool {
return std::all_of(points.begin(), points.end(), [&polygons](const auto& p) {
return pointWithinPolygons(p, polygons);
});
},
[](const auto&) -> bool {return false;});
},
[&feature, &canonical](const mapbox::geometry::polygon<double>& polygon) -> bool {
return convertGeometry(feature, canonical)
.match(
[&polygon](const mapbox::geometry::point<double>& point) -> bool {
return pointWithinPolygon(point, polygon);
},
[&polygon](const mapbox::geometry::multi_point<double>& points) -> bool {
return std::all_of(points.begin(), points.end(), [&polygon](const auto& p) {
return pointWithinPolygon(p, polygon);
});
},
[](const auto&) -> bool { return false; });
},
[](const auto&) -> bool { return false; });
},
[](const auto&) -> bool { return false; });
}
bool linesWithinPolygons(const mbgl::GeometryTileFeature& feature,
const mbgl::CanonicalTileID& canonical,
const mbgl::GeoJSON& geoJson) {
mbgl::Log::Debug(mbgl::Event::General, "------------------------Canonical ID is-------------------------------");
mbgl::Log::Debug(
mbgl::Event::General, "----- '%d' / '%d' / '%d'-------------", canonical.z, canonical.x, canonical.y);
return geoJson.match(
[&feature, &canonical](const mapbox::geometry::geometry<double>& geometrySet) -> bool {
mbgl::Feature f(geometrySet);
PolygonFeature polyFeature(f, CanonicalTileID(0, 0, 0));
auto refinedGeoSet = convertGeometry(polyFeature, CanonicalTileID(0, 0, 0));
return refinedGeoSet.match(
[&feature, &canonical](const MultiPolygon<double>& polygons) -> bool {
return convertGeometry(feature, canonical)
.match(
[&polygons](const LineString<double>& line) -> bool {
printLine(line);
return lineStringWithinPolygons(line, polygons);
},
[&polygons](const MultiLineString<double>& lines) -> bool {
return std::all_of(lines.begin(), lines.end(), [&polygons](const auto& line) {
printLine(line);
return lineStringWithinPolygons(line, polygons);
});
},
[](const auto&) -> bool {
return false;
});
},
[&feature, &canonical](const Polygon<double>& polygon) -> bool {
return convertGeometry(feature, canonical)
.match(
[&polygon](const LineString<double>& line) -> bool {
printLine(line);
return lineStringWithinPolygon(line, polygon);
},
[&polygon](const MultiLineString<double>& lines) -> bool {
return std::all_of(lines.begin(), lines.end(), [&polygon](const auto& line) {
printLine(line);
return lineStringWithinPolygon(line, polygon);
});
},
[](const auto&) -> bool {
return false;
});
},
[](const auto&) -> bool {
return false;
});
},
[](const auto&) -> bool {
return false;
});
}
mbgl::optional<mbgl::GeoJSON> parseValue(const mbgl::style::conversion::Convertible& value_,
mbgl::style::expression::ParsingContext& ctx) {
if (isObject(value_)) {
const auto geometryType = objectMember(value_, "type");
if (geometryType) {
const auto type = toString(*geometryType);
if (type && *type == "Polygon") {
mbgl::style::conversion::Error error;
auto geojson = toGeoJSON(value_, error);
if (geojson && error.message.empty()) {
return geojson;
}
ctx.error(error.message);
}
}
}
ctx.error("'Within' expression requires valid geojson source that contains polygon geometry type.");
return nullopt;
}
} // namespace
namespace style {
namespace expression {
Within::Within(GeoJSON geojson) : Expression(Kind::Within, type::Boolean), geoJSONSource(std::move(geojson)) {}
Within::~Within() = default;
using namespace mbgl::style::conversion;
EvaluationResult Within::evaluate(const EvaluationContext& params) const {
if (!params.feature || !params.canonical) {
return false;
}
auto geometryType = params.feature->getType();
// Currently only support Point/Points in Polygon/Polygons
if (geometryType == FeatureType::Point) {
return pointsWithinPolygons(*params.feature, *params.canonical, geoJSONSource);
} else if (geometryType == FeatureType::LineString) {
return linesWithinPolygons(*params.feature, *params.canonical, geoJSONSource);
}
mbgl::Log::Warning(mbgl::Event::General, "within expression currently only support 'Point' geometry type");
return false;
}
ParseResult Within::parse(const Convertible& value, ParsingContext& ctx) {
if (isArray(value)) {
// object value, quoted with ["within", value]
if (arrayLength(value) != 2) {
ctx.error("'within' expression requires exactly one argument, but found " +
util::toString(arrayLength(value) - 1) + " instead.");
return ParseResult();
}
auto parsedValue = parseValue(arrayMember(value, 1), ctx);
if (!parsedValue) {
return ParseResult();
}
return ParseResult(std::make_unique<Within>(*parsedValue));
}
return ParseResult();
}
Value valueConverter(const mapbox::geojson::rapidjson_value& v) {
if (v.IsDouble()) {
return v.GetDouble();
}
if (v.IsString()) {
return std::string(v.GetString());
}
if (v.IsArray()) {
std::vector<Value> result;
result.reserve(v.Size());
for (const auto& m : v.GetArray()) {
result.push_back(valueConverter(m));
}
return result;
}
// Ignore other types as valid geojson only contains above types.
return Null;
}
mbgl::Value Within::serialize() const {
std::unordered_map<std::string, Value> serialized;
rapidjson::CrtAllocator allocator;
const mapbox::geojson::rapidjson_value value = mapbox::geojson::convert(geoJSONSource, allocator);
if (value.IsObject()) {
for (const auto& m : value.GetObject()) {
serialized.emplace(m.name.GetString(), valueConverter(m.value));
}
} else {
mbgl::Log::Error(mbgl::Event::General,
"Failed to serialize 'within' expression, converted rapidJSON is not an object");
}
return std::vector<mbgl::Value>{{getOperator(), *fromExpressionValue<mbgl::Value>(serialized)}};
}
bool Within::operator==(const Expression& e) const {
if (e.getKind() == Kind::Within) {
auto rhs = static_cast<const Within*>(&e);
return geoJSONSource == rhs->geoJSONSource;
}
return false;
}
std::vector<optional<Value>> Within::possibleOutputs() const {
return {{true}, {false}};
}
std::string Within::getOperator() const {
return "within";
}
} // namespace expression
} // namespace style
} // namespace mbgl
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