101 lines
2.5 KiB
JavaScript
101 lines
2.5 KiB
JavaScript
'use strict';
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const types = require('../../tokenizer/types.cjs');
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const name = 'MediaQuery';
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const structure = {
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modifier: [String, null],
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mediaType: [String, null],
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condition: ['Condition', null]
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};
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function parse() {
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const start = this.tokenStart;
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let modifier = null;
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let mediaType = null;
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let condition = null;
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this.skipSC();
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if (this.tokenType === types.Ident && this.lookupTypeNonSC(1) !== types.LeftParenthesis) {
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// [ not | only ]? <media-type>
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const ident = this.consume(types.Ident);
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const identLowerCase = ident.toLowerCase();
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if (identLowerCase === 'not' || identLowerCase === 'only') {
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this.skipSC();
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modifier = identLowerCase;
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mediaType = this.consume(types.Ident);
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} else {
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mediaType = ident;
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}
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switch (this.lookupTypeNonSC(0)) {
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case types.Ident: {
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// and <media-condition-without-or>
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this.skipSC();
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this.eatIdent('and');
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condition = this.Condition('media');
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break;
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}
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case types.LeftCurlyBracket:
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case types.Semicolon:
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case types.Comma:
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case types.EOF:
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break;
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default:
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this.error('Identifier or parenthesis is expected');
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}
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} else {
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switch (this.tokenType) {
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case types.Ident:
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case types.LeftParenthesis:
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case types.Function: {
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// <media-condition>
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condition = this.Condition('media');
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break;
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}
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case types.LeftCurlyBracket:
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case types.Semicolon:
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case types.EOF:
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break;
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default:
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this.error('Identifier or parenthesis is expected');
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}
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}
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return {
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type: 'MediaQuery',
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loc: this.getLocation(start, this.tokenStart),
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modifier,
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mediaType,
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condition
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};
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}
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function generate(node) {
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if (node.mediaType) {
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if (node.modifier) {
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this.token(types.Ident, node.modifier);
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}
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this.token(types.Ident, node.mediaType);
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if (node.condition) {
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this.token(types.Ident, 'and');
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this.node(node.condition);
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}
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} else if (node.condition) {
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this.node(node.condition);
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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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