import { AtKeyword, Semicolon, LeftCurlyBracket, RightCurlyBracket } from '../../tokenizer/index.js'; function consumeRaw(startToken) { return this.Raw(startToken, this.consumeUntilLeftCurlyBracketOrSemicolon, true); } function isDeclarationBlockAtrule() { for (let offset = 1, type; type = this.lookupType(offset); offset++) { if (type === RightCurlyBracket) { return true; } if (type === LeftCurlyBracket || type === AtKeyword) { return false; } } return false; } export const name = 'Atrule'; export const walkContext = 'atrule'; export const structure = { name: String, prelude: ['AtrulePrelude', 'Raw', null], block: ['Block', null] }; export function parse(isDeclaration = false) { const start = this.tokenStart; let name; let nameLowerCase; let prelude = null; let block = null; this.eat(AtKeyword); name = this.substrToCursor(start + 1); nameLowerCase = name.toLowerCase(); this.skipSC(); // parse prelude if (this.eof === false && this.tokenType !== LeftCurlyBracket && this.tokenType !== Semicolon) { if (this.parseAtrulePrelude) { prelude = this.parseWithFallback(this.AtrulePrelude.bind(this, name, isDeclaration), consumeRaw); } else { prelude = consumeRaw.call(this, this.tokenIndex); } this.skipSC(); } switch (this.tokenType) { case Semicolon: this.next(); break; case LeftCurlyBracket: if (hasOwnProperty.call(this.atrule, nameLowerCase) && typeof this.atrule[nameLowerCase].block === 'function') { block = this.atrule[nameLowerCase].block.call(this, isDeclaration); } else { // TODO: should consume block content as Raw? block = this.Block(isDeclarationBlockAtrule.call(this)); } break; } return { type: 'Atrule', loc: this.getLocation(start, this.tokenStart), name, prelude, block }; } export function generate(node) { this.token(AtKeyword, '@' + node.name); if (node.prelude !== null) { this.node(node.prelude); } if (node.block) { this.node(node.block); } else { this.token(Semicolon, ';'); } }