75 lines
1.7 KiB
JavaScript
75 lines
1.7 KiB
JavaScript
'use strict';
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const getDimension = require('./getDimension');
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const isStandardSyntaxValue = require('./isStandardSyntaxValue');
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const isVariable = require('./isVariable');
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const { animationShorthandKeywords, basicKeywords } = require('../reference/keywords');
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const postcssValueParser = require('postcss-value-parser');
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/** @typedef {import('postcss-value-parser').Node} Node */
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/**
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* Get the animation name within an `animation` shorthand property value.
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*
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* @param {string} value
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*
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* @returns {Node[]}
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*/
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module.exports = function findAnimationName(value) {
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/** @type {Node[]} */
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const animationNames = [];
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const valueNodes = postcssValueParser(value);
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const { nodes } = valueNodes;
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// Handle `inherit`, `initial` and etc
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if (nodes.length === 1 && nodes[0] && basicKeywords.has(nodes[0].value.toLowerCase())) {
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return [nodes[0]];
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}
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let shouldBeIgnored = false;
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valueNodes.walk((valueNode) => {
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if (shouldBeIgnored) return;
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if (valueNode.type === 'function') {
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return false;
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}
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if (valueNode.type !== 'word') {
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return;
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}
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const valueLowerCase = valueNode.value.toLowerCase();
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// Ignore non-standard syntax
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if (!isStandardSyntaxValue(valueLowerCase)) {
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// Cannot find animation name if shorthand has non-standard syntax value (#5532)
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shouldBeIgnored = true;
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animationNames.length = 0; // clears animationNames
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return;
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}
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// Ignore variables
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if (isVariable(valueLowerCase)) {
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return;
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}
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// Ignore keywords for other animation parts
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if (animationShorthandKeywords.has(valueLowerCase)) {
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return;
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}
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// Ignore numbers with units
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const { unit } = getDimension(valueNode);
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if (unit || unit === '') {
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return;
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}
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animationNames.push(valueNode);
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});
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return animationNames;
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};
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