| var TYPE = require('../../tokenizer').TYPE; |
| |
| var ATRULE = TYPE.Atrule; |
| var SEMICOLON = TYPE.Semicolon; |
| var LEFTCURLYBRACKET = TYPE.LeftCurlyBracket; |
| var RIGHTCURLYBRACKET = TYPE.RightCurlyBracket; |
| |
| function consumeRaw(startToken) { |
| return this.Raw(startToken, SEMICOLON, LEFTCURLYBRACKET, false, true); |
| } |
| |
| function isDeclarationBlockAtrule() { |
| for (var offset = 1, type; type = this.scanner.lookupType(offset); offset++) { |
| if (type === RIGHTCURLYBRACKET) { |
| return true; |
| } |
| |
| if (type === LEFTCURLYBRACKET || |
| type === ATRULE) { |
| return false; |
| } |
| } |
| |
| return false; |
| } |
| |
| module.exports = { |
| name: 'Atrule', |
| structure: { |
| name: String, |
| prelude: ['AtrulePrelude', 'Raw', null], |
| block: ['Block', null] |
| }, |
| parse: function() { |
| var start = this.scanner.tokenStart; |
| var name; |
| var nameLowerCase; |
| var prelude = null; |
| var block = null; |
| |
| this.scanner.eat(ATRULE); |
| |
| name = this.scanner.substrToCursor(start + 1); |
| nameLowerCase = name.toLowerCase(); |
| this.scanner.skipSC(); |
| |
| // parse prelude |
| if (this.scanner.eof === false && |
| this.scanner.tokenType !== LEFTCURLYBRACKET && |
| this.scanner.tokenType !== SEMICOLON) { |
| if (this.parseAtrulePrelude) { |
| prelude = this.parseWithFallback(this.AtrulePrelude.bind(this, name), consumeRaw); |
| |
| // turn empty AtrulePrelude into null |
| if (prelude.type === 'AtrulePrelude' && prelude.children.head === null) { |
| prelude = null; |
| } |
| } else { |
| prelude = consumeRaw.call(this, this.scanner.currentToken); |
| } |
| |
| this.scanner.skipSC(); |
| } |
| |
| switch (this.scanner.tokenType) { |
| case SEMICOLON: |
| this.scanner.next(); |
| break; |
| |
| case LEFTCURLYBRACKET: |
| if (this.atrule.hasOwnProperty(nameLowerCase) && |
| typeof this.atrule[nameLowerCase].block === 'function') { |
| block = this.atrule[nameLowerCase].block.call(this); |
| } else { |
| // TODO: should consume block content as Raw? |
| block = this.Block(isDeclarationBlockAtrule.call(this)); |
| } |
| |
| break; |
| } |
| |
| return { |
| type: 'Atrule', |
| loc: this.getLocation(start, this.scanner.tokenStart), |
| name: name, |
| prelude: prelude, |
| block: block |
| }; |
| }, |
| generate: function(node) { |
| this.chunk('@'); |
| this.chunk(node.name); |
| |
| if (node.prelude !== null) { |
| this.chunk(' '); |
| this.node(node.prelude); |
| } |
| |
| if (node.block) { |
| this.node(node.block); |
| } else { |
| this.chunk(';'); |
| } |
| }, |
| walkContext: 'atrule' |
| }; |