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40 lines
1.2 KiB
40 lines
1.2 KiB
// @flow
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import {
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eachLayer,
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eachProperty
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} from '../visit.js';
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import {isExpression} from '../expression/index.js';
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import convertFunction, {convertTokenString} from '../function/convert.js';
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import convertFilter from '../feature_filter/convert.js';
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import type {StyleSpecification} from '../types.js';
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/**
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* Migrate the given style object in place to use expressions. Specifically,
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* this will convert (a) "stop" functions, and (b) legacy filters to their
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* expression equivalents.
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*/
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export default function(style: StyleSpecification): StyleSpecification {
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const converted = [];
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eachLayer(style, (layer) => {
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if (layer.filter) {
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layer.filter = (convertFilter(layer.filter): any);
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}
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});
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eachProperty(style, {paint: true, layout: true}, ({path, value, reference, set}) => {
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if (isExpression(value)) return;
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if (typeof value === 'object' && !Array.isArray(value)) {
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set(convertFunction(value, reference));
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converted.push(path.join('.'));
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} else if (reference.tokens && typeof value === 'string') {
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set(convertTokenString(value));
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}
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});
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return style;
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}
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