51 lines
1.7 KiB
JavaScript
51 lines
1.7 KiB
JavaScript
// NOTICE: This file is generated by Rollup. To modify it,
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// please instead edit the ESM counterpart and rebuild with Rollup (npm run build).
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'use strict';
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const balancedMatch = require('balanced-match');
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const valueParser = require('postcss-value-parser');
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const validateTypes = require('./validateTypes.cjs');
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/** @typedef {(expression: string, expressionIndex: number, funcNode: valueParser.FunctionNode, parsedValue: valueParser.ParsedValue) => void} Callback */
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/**
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* Search a CSS string for functions by name.
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* For every match, invoke the callback, passing the function's
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* "argument(s) string" (whatever is inside the parentheses)
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* as an argument.
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*
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* Callback will be called once for every matching function found,
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* with the function's "argument(s) string" and its starting index
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* as the arguments.
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*
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* @param {string} source
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* @param {string | RegExp} functionName
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* @param {Callback} callback
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* @returns {valueParser.ParsedValue}
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*/
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function functionArgumentsSearch(source, functionName, callback) {
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const parsedValue = valueParser(source);
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return parsedValue.walk((node) => {
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if (node.type !== 'function') return;
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const { value } = node;
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if (validateTypes.isString(functionName) && value !== functionName) return;
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if (validateTypes.isRegExp(functionName) && !functionName.test(node.value)) return;
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const parensMatch = balancedMatch('(', ')', source.slice(node.sourceIndex));
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validateTypes.assert(parensMatch);
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const expression = parensMatch.body;
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const parenLength = 1; // == '('
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const expressionIndex = node.sourceIndex + value.length + parenLength;
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callback(expression, expressionIndex, node, parsedValue);
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});
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}
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module.exports = functionArgumentsSearch;
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