55 lines
1 KiB
JavaScript
55 lines
1 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
const types = require('../../tokenizer/types.cjs');
|
||
|
|
|
||
|
|
const name = 'Nth';
|
||
|
|
const structure = {
|
||
|
|
nth: ['AnPlusB', 'Identifier'],
|
||
|
|
selector: ['SelectorList', null]
|
||
|
|
};
|
||
|
|
|
||
|
|
function parse() {
|
||
|
|
this.skipSC();
|
||
|
|
|
||
|
|
const start = this.tokenStart;
|
||
|
|
let end = start;
|
||
|
|
let selector = null;
|
||
|
|
let nth;
|
||
|
|
|
||
|
|
if (this.lookupValue(0, 'odd') || this.lookupValue(0, 'even')) {
|
||
|
|
nth = this.Identifier();
|
||
|
|
} else {
|
||
|
|
nth = this.AnPlusB();
|
||
|
|
}
|
||
|
|
|
||
|
|
end = this.tokenStart;
|
||
|
|
this.skipSC();
|
||
|
|
|
||
|
|
if (this.lookupValue(0, 'of')) {
|
||
|
|
this.next();
|
||
|
|
|
||
|
|
selector = this.SelectorList();
|
||
|
|
end = this.tokenStart;
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
type: 'Nth',
|
||
|
|
loc: this.getLocation(start, end),
|
||
|
|
nth,
|
||
|
|
selector
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
function generate(node) {
|
||
|
|
this.node(node.nth);
|
||
|
|
if (node.selector !== null) {
|
||
|
|
this.token(types.Ident, 'of');
|
||
|
|
this.node(node.selector);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.generate = generate;
|
||
|
|
exports.name = name;
|
||
|
|
exports.parse = parse;
|
||
|
|
exports.structure = structure;
|