41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
#include <mbgl/style/expression/expression.hpp>
|
|
#include <mbgl/style/expression/compound_expression.hpp>
|
|
#include <mbgl/tile/geometry_tile_data.hpp>
|
|
|
|
namespace mbgl {
|
|
namespace style {
|
|
namespace expression {
|
|
|
|
class GeoJSONFeature : public GeometryTileFeature {
|
|
public:
|
|
const Feature& feature;
|
|
|
|
GeoJSONFeature(const Feature& feature_) : feature(feature_) {}
|
|
|
|
FeatureType getType() const override {
|
|
return apply_visitor(ToFeatureType(), feature.geometry);
|
|
}
|
|
PropertyMap getProperties() const override { return feature.properties; }
|
|
FeatureIdentifier getID() const override { return feature.id; }
|
|
const GeometryCollection& getGeometries() const override { return geometry; }
|
|
optional<mbgl::Value> getValue(const std::string& key) const override {
|
|
auto it = feature.properties.find(key);
|
|
if (it != feature.properties.end()) {
|
|
return optional<mbgl::Value>(it->second);
|
|
}
|
|
return optional<mbgl::Value>();
|
|
}
|
|
|
|
GeometryCollection geometry;
|
|
};
|
|
|
|
|
|
EvaluationResult Expression::evaluate(optional<float> zoom, const Feature& feature, optional<double> colorRampParameter) const {
|
|
GeoJSONFeature f(feature);
|
|
return this->evaluate(EvaluationContext(zoom, &f, colorRampParameter));
|
|
}
|
|
|
|
} // namespace expression
|
|
} // namespace style
|
|
} // namespace mbgl
|