71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
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'use strict';
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const types = require('../../tokenizer/types.cjs');
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const MediaFeatureToken = new Set([types.Colon, types.RightParenthesis, types.EOF]);
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const name = 'MediaCondition';
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const structure = {
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children: [[
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'Identifier',
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'MediaFeature',
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'MediaFeatureRange'
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]]
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};
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function parse() {
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const children = this.createList();
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scan: while (!this.eof) {
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switch (this.tokenType) {
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case types.Comment:
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case types.WhiteSpace:
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this.next();
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continue;
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case types.Ident:
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children.push(this.Identifier());
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break;
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case types.LeftParenthesis:
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if (this.lookupTypeNonSC(1) === types.Ident && MediaFeatureToken.has(this.lookupTypeNonSC(2))) {
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children.push(this.MediaFeature());
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} else if (this.lookupTypeNonSC(1) === types.LeftParenthesis || this.lookupTypeNonSC(2) === types.LeftParenthesis) {
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this.next();
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children.push(this.MediaCondition());
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this.eat(types.RightParenthesis);
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} else {
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children.push(this.MediaFeatureRange());
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}
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break;
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default:
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break scan;
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}
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}
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return {
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type: 'MediaCondition',
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loc: this.getLocationFromList(children),
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children
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};
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}
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function generate(node) {
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node.children.forEach(child => {
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if (child.type === 'MediaCondition') {
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this.token(types.LeftParenthesis, '(');
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this.node(child);
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this.token(types.RightParenthesis, ')');
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} else {
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this.node(child);
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}
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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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