class OldSelector { constructor (selector, prefix) { this.prefix = prefix this.prefixed = selector.prefixed(this.prefix) this.regexp = selector.regexp(this.prefix) this.prefixeds = selector .possible() .map(x => [selector.prefixed(x), selector.regexp(x)]) this.unprefixed = selector.name this.nameRegexp = selector.regexp() } /** * Is rule a hack without unprefixed version bottom */ isHack (rule) { let index = rule.parent.index(rule) + 1 let rules = rule.parent.nodes while (index < rules.length) { let before = rules[index].selector if (!before) { return true } if (before.includes(this.unprefixed) && before.match(this.nameRegexp)) { return false } let some = false for (let [string, regexp] of this.prefixeds) { if (before.includes(string) && before.match(regexp)) { some = true break } } if (!some) { return true } index += 1 } return true } /** * Does rule contain an unnecessary prefixed selector */ check (rule) { if (!rule.selector.includes(this.prefixed)) { return false } if (!rule.selector.match(this.regexp)) { return false } if (this.isHack(rule)) { return false } return true } } module.exports = OldSelector