75 lines
2.0 KiB
JavaScript
75 lines
2.0 KiB
JavaScript
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module.exports = function resolveNestedSelector(selector, node) {
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var parent = node.parent;
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var parentIsNestAtRule = parent.type === 'atrule' && parent.name === 'nest';
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if (parent.type === 'root') return [selector];
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if (parent.type !== 'rule' && !parentIsNestAtRule) return resolveNestedSelector(selector, parent);
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var parentSelectors = (parentIsNestAtRule)
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? split(parent.params, ',', false).map((x) => x.trim())
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: parent.selectors;
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var resolvedSelectors = parentSelectors.reduce(function(result, parentSelector) {
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if (selector.indexOf('&') !== -1) {
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var newlyResolvedSelectors = resolveNestedSelector(parentSelector, parent).map(function(resolvedParentSelector) {
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return split(selector, '&', true).join(resolvedParentSelector);
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});
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return result.concat(newlyResolvedSelectors);
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}
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var combinedSelector = [ parentSelector, selector ].join(' ');
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return result.concat(resolveNestedSelector(combinedSelector, parent));
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}, []);
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return resolvedSelectors;
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}
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var blockPairs = {
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'(': ')',
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'[': ']',
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'{': '}'
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};
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function split(string, separator, splitFunctions) {
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var array = [];
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var current = '';
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var split = false;
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var blockClose = [];
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var inQuote = false;
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var prevQuote = '';
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var escape = false;
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for (var letter of string) {
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if (escape) {
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escape = false;
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} else if (letter === '\\') {
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escape = true;
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} else if (inQuote) {
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if (letter === prevQuote) {
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inQuote = false;
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}
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} else if (letter === '"' || letter === "'") {
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inQuote = true;
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prevQuote = letter;
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} else if (letter === '(' || letter === '[' || letter === '{') {
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blockClose.push(blockPairs[letter]);
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} else if (letter === blockClose[blockClose.length - 1]) {
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blockClose.pop();
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} else if (blockClose.length === 0 || (splitFunctions && blockClose.every((x) => x === ')'))) {
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if (letter === separator) split = true;
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}
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if (split) {
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array.push(current);
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current = '';
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split = false;
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} else {
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current += letter;
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}
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}
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array.push(current);
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return array;
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}
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