57 lines
2.2 KiB
C++
57 lines
2.2 KiB
C++
#pragma once
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#include <mbgl/style/property_value.hpp>
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#include <mbgl/style/conversion/constant.hpp>
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#include <mbgl/style/conversion/function.hpp>
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#include <mbgl/style/conversion.hpp>
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#include <mbgl/style/expression/value.hpp>
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#include <mbgl/style/expression/is_constant.hpp>
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#include <mbgl/style/expression/is_expression.hpp>
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#include <mbgl/style/expression/parsing_context.hpp>
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#include <mbgl/style/expression/literal.hpp>
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namespace mbgl {
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namespace style {
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namespace conversion {
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template <class T>
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struct Converter<PropertyValue<T>> {
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optional<PropertyValue<T>> operator()(const Convertible& value, Error& error, bool allowDataExpressions, bool convertTokens) const;
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template <class S>
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PropertyValue<T> maybeConvertTokens(const S& t) const {
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return PropertyValue<T>(t);
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};
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PropertyValue<T> maybeConvertTokens(const std::string& t) const {
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return hasTokens(t)
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? PropertyValue<T>(PropertyExpression<T>(convertTokenStringToExpression(t)))
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: PropertyValue<T>(t);
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}
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PropertyValue<T> maybeConvertTokens(const expression::Formatted& t) const {
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// This only works with a single-section `Formatted` created automatically
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// by parsing a plain-text `text-field` property.
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// Token conversion happens later than the initial string->Formatted conversion
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// General purpose `format` expressions with embedded tokens are not supported
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const std::string& firstUnformattedSection = t.sections[0].text;
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return hasTokens(firstUnformattedSection)
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? PropertyValue<T>(PropertyExpression<T>(convertTokenStringToFormatExpression(firstUnformattedSection)))
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: PropertyValue<T>(t);
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}
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PropertyValue<T> maybeConvertTokens(const expression::Image& image) const {
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return hasTokens(image.id())
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? PropertyValue<T>(PropertyExpression<T>(convertTokenStringToImageExpression(image.id())))
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: PropertyValue<T>(image);
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}
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};
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template <>
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struct Converter<PropertyValue<std::array<double, 3>>, void> {
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optional<PropertyValue<std::array<double, 3>>> operator()(const Convertible& value, Error& error, bool, bool) const;
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};
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} // namespace conversion
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} // namespace style
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} // namespace mbgl
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