67 lines
1.5 KiB
JavaScript
67 lines
1.5 KiB
JavaScript
import {
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Ident,
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LeftParenthesis,
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RightParenthesis
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} from '../../tokenizer/index.js';
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export const name = 'Scope';
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export 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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export 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 === 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(RightParenthesis);
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}
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if (this.lookupNonWSType(0) === 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(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(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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export function generate(node) {
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if (node.root) {
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this.token(LeftParenthesis, '(');
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this.node(node.root);
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this.token(RightParenthesis, ')');
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}
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if (node.limit) {
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this.token(Ident, 'to');
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this.token(LeftParenthesis, '(');
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this.node(node.limit);
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this.token(RightParenthesis, ')');
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}
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}
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