old-selector.js
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"use strict";
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var OldSelector = function () {
function OldSelector(selector, prefix) {
_classCallCheck(this, OldSelector);
this.prefix = prefix;
this.prefixed = selector.prefixed(this.prefix);
this.regexp = selector.regexp(this.prefix);
this.prefixeds = selector.possible().map(function (x) {
return [selector.prefixed(x), selector.regexp(x)];
});
this.unprefixed = selector.name;
this.nameRegexp = selector.regexp();
}
/**
* Is rule a hack without unprefixed version bottom
*/
OldSelector.prototype.isHack = function isHack(rule) {
var index = rule.parent.index(rule) + 1;
var rules = rule.parent.nodes;
while (index < rules.length) {
var before = rules[index].selector;
if (!before) {
return true;
}
if (before.indexOf(this.unprefixed) !== -1 && before.match(this.nameRegexp)) {
return false;
}
var some = false;
for (var _iterator = this.prefixeds, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
var _ref2;
if (_isArray) {
if (_i >= _iterator.length) break;
_ref2 = _iterator[_i++];
} else {
_i = _iterator.next();
if (_i.done) break;
_ref2 = _i.value;
}
var _ref = _ref2;
var string = _ref[0];
var regexp = _ref[1];
if (before.indexOf(string) !== -1 && before.match(regexp)) {
some = true;
break;
}
}
if (!some) {
return true;
}
index += 1;
}
return true;
};
/**
* Does rule contain an unnecessary prefixed selector
*/
OldSelector.prototype.check = function check(rule) {
if (rule.selector.indexOf(this.prefixed) === -1) {
return false;
}
if (!rule.selector.match(this.regexp)) {
return false;
}
if (this.isHack(rule)) {
return false;
}
return true;
};
return OldSelector;
}();
module.exports = OldSelector;