70 lines
1.6 KiB
JavaScript
70 lines
1.6 KiB
JavaScript
'use strict';
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const types = require('../../tokenizer/types.cjs');
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const name = 'Scope';
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const structure = {
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root: ['SelectorList', 'Raw', null],
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limit: ['SelectorList', 'Raw', null]
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};
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function parse() {
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let root = null;
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let limit = null;
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this.skipSC();
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const startOffset = this.tokenStart;
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if (this.tokenType === types.LeftParenthesis) {
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this.next();
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this.skipSC();
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root = this.parseWithFallback(
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this.SelectorList,
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() => this.Raw(false, true)
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);
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this.skipSC();
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this.eat(types.RightParenthesis);
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}
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if (this.lookupNonWSType(0) === types.Ident) {
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this.skipSC();
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this.eatIdent('to');
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this.skipSC();
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this.eat(types.LeftParenthesis);
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this.skipSC();
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limit = this.parseWithFallback(
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this.SelectorList,
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() => this.Raw(false, true)
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);
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this.skipSC();
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this.eat(types.RightParenthesis);
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}
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return {
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type: 'Scope',
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loc: this.getLocation(startOffset, this.tokenStart),
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root,
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limit
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};
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}
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function generate(node) {
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if (node.root) {
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this.token(types.LeftParenthesis, '(');
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this.node(node.root);
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this.token(types.RightParenthesis, ')');
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}
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if (node.limit) {
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this.token(types.Ident, 'to');
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this.token(types.LeftParenthesis, '(');
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this.node(node.limit);
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this.token(types.RightParenthesis, ')');
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}
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}
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exports.generate = generate;
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exports.name = name;
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exports.parse = parse;
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exports.structure = structure;
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