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