61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
#pragma once
|
|
|
|
#include <mbgl/style/function/exponential_stops.hpp>
|
|
#include <mbgl/style/function/interval_stops.hpp>
|
|
#include <mbgl/style/function/categorical_stops.hpp>
|
|
#include <mbgl/style/function/identity_stops.hpp>
|
|
#include <mbgl/util/interpolate.hpp>
|
|
#include <mbgl/util/variant.hpp>
|
|
|
|
#include <string>
|
|
|
|
namespace mbgl {
|
|
namespace style {
|
|
|
|
template <class T>
|
|
class SourceFunction {
|
|
public:
|
|
using Stops = std::conditional_t<
|
|
util::Interpolatable<T>,
|
|
variant<
|
|
ExponentialStops<T>,
|
|
IntervalStops<T>,
|
|
CategoricalStops<T>,
|
|
IdentityStops<T>>,
|
|
variant<
|
|
IntervalStops<T>,
|
|
CategoricalStops<T>,
|
|
IdentityStops<T>>>;
|
|
|
|
SourceFunction(std::string property_, Stops stops_, optional<T> defaultValue_ = {})
|
|
: property(std::move(property_)),
|
|
stops(std::move(stops_)),
|
|
defaultValue(std::move(defaultValue_)) {
|
|
}
|
|
|
|
template <class Feature>
|
|
T evaluate(const Feature& feature, T finalDefaultValue) const {
|
|
optional<Value> v = feature.getValue(property);
|
|
if (!v) {
|
|
return defaultValue.value_or(finalDefaultValue);
|
|
}
|
|
return stops.match([&] (const auto& s) -> T {
|
|
return s.evaluate(*v).value_or(defaultValue.value_or(finalDefaultValue));
|
|
});
|
|
}
|
|
|
|
friend bool operator==(const SourceFunction& lhs,
|
|
const SourceFunction& rhs) {
|
|
return std::tie(lhs.property, lhs.stops, lhs.defaultValue)
|
|
== std::tie(rhs.property, rhs.stops, rhs.defaultValue);
|
|
}
|
|
|
|
std::string property;
|
|
Stops stops;
|
|
optional<T> defaultValue;
|
|
bool useIntegerZoom = false;
|
|
};
|
|
|
|
} // namespace style
|
|
} // namespace mbgl
|