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#pragma once
#include <mbgl/style/heatmap_color_property_value.hpp>
#include <mbgl/style/conversion.hpp>
#include <mbgl/style/conversion/constant.hpp>
#include <mbgl/style/conversion/function.hpp>
#include <mbgl/style/expression/value.hpp>
#include <mbgl/style/expression/is_constant.hpp>
#include <mbgl/style/expression/is_expression.hpp>
#include <mbgl/style/expression/find_zoom_curve.hpp>
#include <mbgl/style/expression/parsing_context.hpp>
namespace mbgl {
namespace style {
namespace conversion {
template <>
struct Converter<HeatmapColorPropertyValue> {
optional<HeatmapColorPropertyValue> operator()(const Convertible& value, Error& error) const {
using namespace mbgl::style::expression;
if (isUndefined(value)) {
return HeatmapColorPropertyValue();
} else if (isExpression(value)) {
ParsingContext ctx(type::Color);
ParseResult expression = ctx.parseLayerPropertyExpression(value);
if (!expression) {
error = { ctx.getCombinedErrors() };
return {};
}
assert(*expression);
if (!isFeatureConstant(**expression)) {
error = { "property expressions not supported" };
return {};
}
if (!isZoomConstant(**expression)) {
error = { "zoom expressions not supported" };
return {};
}
return {HeatmapColorPropertyValue(std::move(*expression))};
} else {
error = { "heatmap-color must be an expression" };
return {};
}
}
};
} // namespace conversion
} // namespace style
} // namespace mbgl
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