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transform_text.js
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transform_text.js
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// @flow
import { plugin as rtlTextPlugin } from '../source/rtl_text_plugin';
import type SymbolStyleLayer from '../style/style_layer/symbol_style_layer';
import type {Feature} from '../style-spec/expression';
import Formatted from '../style-spec/expression/types/formatted';
function transformText(text: string, layer: SymbolStyleLayer, feature: Feature) {
const transform = layer.layout.get('text-transform').evaluate(feature, {});
if (transform === 'uppercase') {
text = text.toLocaleUpperCase();
} else if (transform === 'lowercase') {
text = text.toLocaleLowerCase();
}
if (rtlTextPlugin.applyArabicShaping) {
text = rtlTextPlugin.applyArabicShaping(text);
}
return text;
}
export default function(text: Formatted, layer: SymbolStyleLayer, feature: Feature): Formatted {
text.sections.forEach(section => {
section.text = transformText(section.text, layer, feature);
});
return text;
}