'use strict';
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var list = require('postcss').list;
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module.exports = {
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/**
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* Throw special error, to tell beniary,
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* that this error is from Autoprefixer.
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*/
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error: function error(text) {
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var err = new Error(text);
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err.autoprefixer = true;
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throw err;
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},
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/**
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* Return array, that doesn’t contain duplicates.
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*/
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uniq: function uniq(array) {
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var filtered = [];
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for (var _iterator = array, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
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var _ref;
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if (_isArray) {
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if (_i >= _iterator.length) break;
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_ref = _iterator[_i++];
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} else {
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_i = _iterator.next();
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if (_i.done) break;
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_ref = _i.value;
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}
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var i = _ref;
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if (filtered.indexOf(i) === -1) {
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filtered.push(i);
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}
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}
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return filtered;
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},
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/**
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* Return "-webkit-" on "-webkit- old"
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*/
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removeNote: function removeNote(string) {
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if (string.indexOf(' ') === -1) {
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return string;
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}
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return string.split(' ')[0];
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},
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/**
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* Escape RegExp symbols
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*/
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escapeRegexp: function escapeRegexp(string) {
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return string.replace(/[.?*+\^\$\[\]\\(){}|\-]/g, '\\$&');
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},
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/**
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* Return regexp to check, that CSS string contain word
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*/
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regexp: function regexp(word) {
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var escape = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
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if (escape) {
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word = this.escapeRegexp(word);
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}
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return new RegExp('(^|[\\s,(])(' + word + '($|[\\s(,]))', 'gi');
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},
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/**
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* Change comma list
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*/
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editList: function editList(value, callback) {
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var origin = list.comma(value);
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var changed = callback(origin, []);
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if (origin === changed) {
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return value;
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}
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var join = value.match(/,\s*/);
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join = join ? join[0] : ', ';
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return changed.join(join);
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}
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};
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