3 function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
5 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
7 function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
9 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : _defaults(subClass, superClass); }
11 var OldSelector = require('./old-selector');
12 var Prefixer = require('./prefixer');
13 var Browsers = require('./browsers');
14 var utils = require('./utils');
16 var Selector = function (_Prefixer) {
17 _inherits(Selector, _Prefixer);
19 function Selector(name, prefixes, all) {
20 _classCallCheck(this, Selector);
22 var _this = _possibleConstructorReturn(this, _Prefixer.call(this, name, prefixes, all));
24 _this.regexpCache = {};
29 * Is rule selectors need to be prefixed
33 Selector.prototype.check = function check(rule) {
34 if (rule.selector.indexOf(this.name) !== -1) {
35 return !!rule.selector.match(this.regexp());
42 * Return prefixed version of selector
46 Selector.prototype.prefixed = function prefixed(prefix) {
47 return this.name.replace(/^([^\w]*)/, '$1' + prefix);
51 * Lazy loadRegExp for name
55 Selector.prototype.regexp = function regexp(prefix) {
56 if (this.regexpCache[prefix]) {
57 return this.regexpCache[prefix];
60 var name = prefix ? this.prefixed(prefix) : this.name;
61 this.regexpCache[prefix] = new RegExp('(^|[^:"\'=])' + utils.escapeRegexp(name), 'gi');
62 return this.regexpCache[prefix];
66 * All possible prefixes
70 Selector.prototype.possible = function possible() {
71 return Browsers.prefixes();
75 * Return all possible selector prefixes
79 Selector.prototype.prefixeds = function prefixeds(rule) {
80 if (rule._autoprefixerPrefixeds) {
81 return rule._autoprefixerPrefixeds;
85 for (var _iterator = this.possible(), _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
89 if (_i >= _iterator.length) break;
90 _ref = _iterator[_i++];
92 _i = _iterator.next();
99 prefixeds[prefix] = this.replace(rule.selector, prefix);
102 rule._autoprefixerPrefixeds = prefixeds;
103 return rule._autoprefixerPrefixeds;
107 * Is rule already prefixed before
111 Selector.prototype.already = function already(rule, prefixeds, prefix) {
112 var index = rule.parent.index(rule) - 1;
115 var before = rule.parent.nodes[index];
117 if (before.type !== 'rule') {
122 for (var key in prefixeds) {
123 var prefixed = prefixeds[key];
124 if (before.selector === prefixed) {
125 if (prefix === key) {
144 * Replace selectors by prefixed one
148 Selector.prototype.replace = function replace(selector, prefix) {
149 return selector.replace(this.regexp(), '$1' + this.prefixed(prefix));
153 * Clone and add prefixes for at-rule
157 Selector.prototype.add = function add(rule, prefix) {
158 var prefixeds = this.prefixeds(rule);
160 if (this.already(rule, prefixeds, prefix)) {
164 var cloned = this.clone(rule, { selector: prefixeds[prefix] });
165 rule.parent.insertBefore(rule, cloned);
169 * Return function to fast find prefixed selector
173 Selector.prototype.old = function old(prefix) {
174 return new OldSelector(this, prefix);
180 module.exports = Selector;