MediaCondition.cjs•1.88 kB
'use strict';
const types = require('../../tokenizer/types.cjs');
const MediaFeatureToken = new Set([types.Colon, types.RightParenthesis, types.EOF]);
const name = 'MediaCondition';
const structure = {
children: [[
'Identifier',
'MediaFeature',
'MediaFeatureRange'
]]
};
function parse() {
const children = this.createList();
scan: while (!this.eof) {
switch (this.tokenType) {
case types.Comment:
case types.WhiteSpace:
this.next();
continue;
case types.Ident:
children.push(this.Identifier());
break;
case types.LeftParenthesis:
if (this.lookupTypeNonSC(1) === types.Ident && MediaFeatureToken.has(this.lookupTypeNonSC(2))) {
children.push(this.MediaFeature());
} else if (this.lookupTypeNonSC(1) === types.LeftParenthesis || this.lookupTypeNonSC(2) === types.LeftParenthesis) {
this.next();
children.push(this.MediaCondition());
this.eat(types.RightParenthesis);
} else {
children.push(this.MediaFeatureRange());
}
break;
default:
break scan;
}
}
return {
type: 'MediaCondition',
loc: this.getLocationFromList(children),
children
};
}
function generate(node) {
node.children.forEach(child => {
if (child.type === 'MediaCondition') {
this.token(types.LeftParenthesis, '(');
this.node(child);
this.token(types.RightParenthesis, ')');
} else {
this.node(child);
}
});
}
exports.generate = generate;
exports.name = name;
exports.parse = parse;
exports.structure = structure;