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[core] Add support for data-driven styling
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46 changes: 46 additions & 0 deletions
46
include/mbgl/style/conversion/data_driven_property_value.hpp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| #pragma once | ||
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| #include <mbgl/style/data_driven_property_value.hpp> | ||
| #include <mbgl/style/conversion.hpp> | ||
| #include <mbgl/style/conversion/constant.hpp> | ||
| #include <mbgl/style/conversion/function.hpp> | ||
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| namespace mbgl { | ||
| namespace style { | ||
| namespace conversion { | ||
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| template <class T> | ||
| struct Converter<DataDrivenPropertyValue<T>> { | ||
| template <class V> | ||
| Result<DataDrivenPropertyValue<T>> operator()(const V& value) const { | ||
| if (isUndefined(value)) { | ||
| return {}; | ||
| } else if (!isObject(value)) { | ||
| Result<T> constant = convert<T>(value); | ||
| if (!constant) { | ||
| return constant.error(); | ||
| } | ||
| return DataDrivenPropertyValue<T>(*constant); | ||
| } else if (!objectMember(value, "property")) { | ||
| Result<CameraFunction<T>> function = convert<CameraFunction<T>>(value); | ||
| if (!function) { | ||
| return function.error(); | ||
| } | ||
| return DataDrivenPropertyValue<T>(*function); | ||
| } else { | ||
| Result<CompositeFunction<T>> composite = convert<CompositeFunction<T>>(value); | ||
| if (composite) { | ||
| return DataDrivenPropertyValue<T>(*composite); | ||
| } | ||
| Result<SourceFunction<T>> source = convert<SourceFunction<T>>(value); | ||
| if (!source) { | ||
| return source.error(); | ||
| } | ||
| return DataDrivenPropertyValue<T>(*source); | ||
| } | ||
| } | ||
| }; | ||
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| } // namespace conversion | ||
| } // namespace style | ||
| } // namespace mbgl |
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