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#pragma once
#include <mbgl/util/variant.hpp>
#include <mbgl/style/undefined.hpp>
#include <mbgl/style/function/camera_function.hpp>
#include <mbgl/renderer/property_evaluation_parameters.hpp>
namespace mbgl {
namespace style {
class NoopPropertyEvaluator {
public:
using ResultType = Color;
NoopPropertyEvaluator(const PropertyEvaluationParameters&, Color) {}
};
/*
* Special-case implementation of (a subset of) the PropertyValue<T> interface
* used for building the HeatmapColor paint property traits class.
*/
class HeatmapColorPropertyValue {
private:
std::shared_ptr<expression::Expression> value;
friend bool operator==(const HeatmapColorPropertyValue& lhs, const HeatmapColorPropertyValue& rhs) {
return *(lhs.value) == *(rhs.value);
}
friend bool operator!=(const HeatmapColorPropertyValue& lhs, const HeatmapColorPropertyValue& rhs) {
return !(lhs == rhs);
}
public:
HeatmapColorPropertyValue() : value(nullptr) {}
HeatmapColorPropertyValue(std::shared_ptr<expression::Expression> value_) : value(std::move(value_)) {}
bool isUndefined() const { return value.get() != nullptr; }
// noop, needed for batch evaluation of paint property values to compile
Color evaluate(const NoopPropertyEvaluator&, TimePoint = {}) const { return {}; }
bool isDataDriven() const { return false; }
bool hasDataDrivenPropertyDifference(const HeatmapColorPropertyValue&) const { return false; }
};
} // namespace style
} // namespace mbgl
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