103 lines
2.4 KiB
JavaScript
103 lines
2.4 KiB
JavaScript
import {
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Comma,
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EOF,
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Ident,
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LeftCurlyBracket,
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LeftParenthesis,
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Function as FunctionToken,
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Semicolon
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} from '../../tokenizer/index.js';
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export const name = 'MediaQuery';
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export 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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export 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 === Ident && this.lookupTypeNonSC(1) !== LeftParenthesis) {
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// [ not | only ]? <media-type>
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const ident = this.consume(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(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 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 LeftCurlyBracket:
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case Semicolon:
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case Comma:
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case 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 Ident:
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case LeftParenthesis:
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case FunctionToken: {
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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 LeftCurlyBracket:
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case Semicolon:
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case 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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export function generate(node) {
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if (node.mediaType) {
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if (node.modifier) {
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this.token(Ident, node.modifier);
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}
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this.token(Ident, node.mediaType);
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if (node.condition) {
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this.token(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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