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#pragma once
#include <mbgl/style/expression/expression.hpp>
#include <mbgl/style/expression/parsing_context.hpp>
#include <mbgl/style/expression/get_covering_stops.hpp>
#include <mbgl/style/expression/interpolator.hpp>
#include <mbgl/style/conversion.hpp>
#include <memory>
#include <map>
#include <cmath>
namespace mbgl {
namespace style {
namespace expression {
ParseResult parseInterpolate(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx);
class Interpolate : public Expression {
public:
Interpolate(const type::Type& type_,
Interpolator interpolator_,
std::unique_ptr<Expression> input_,
std::map<double, std::unique_ptr<Expression>> stops_);
const std::unique_ptr<Expression>& getInput() const { return input; }
const Interpolator& getInterpolator() const { return interpolator; }
void eachChild(const std::function<void(const Expression&)>& visit) const override {
visit(*input);
for (const auto& stop : stops) {
visit(*stop.second);
}
}
void eachStop(const std::function<void(double, const Expression&)>& visit) const {
for (const auto& stop : stops) {
visit(stop.first, *stop.second);
}
}
// Return the smallest range of stops that covers the interval [lower, upper]
Range<float> getCoveringStops(const double lower, const double upper) const {
return ::mbgl::style::expression::getCoveringStops(stops, lower, upper);
}
double interpolationFactor(const Range<double>& inputLevels, const double inputValue) const {
return interpolator.match(
[&](const auto& interp) { return interp.interpolationFactor(inputLevels, inputValue); }
);
}
bool operator==(const Expression& e) const override {
if (auto rhs = dynamic_cast<const Interpolate*>(&e)) {
if (interpolator != rhs->interpolator ||
*input != *(rhs->input) ||
stops.size() != rhs->stops.size())
{
return false;
}
return Expression::childrenEqual(stops, rhs->stops);
}
return false;
}
std::vector<optional<Value>> possibleOutputs() const override;
mbgl::Value serialize() const override;
std::string getOperator() const override { return "interpolate"; }
protected:
const Interpolator interpolator;
const std::unique_ptr<Expression> input;
const std::map<double, std::unique_ptr<Expression>> stops;
};
ParseResult createInterpolate(type::Type type,
Interpolator interpolator,
std::unique_ptr<Expression> input,
std::map<double, std::unique_ptr<Expression>> stops,
ParsingContext& ctx);
} // namespace expression
} // namespace style
} // namespace mbgl
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