var TYPE = require('../../tokenizer').TYPE; var CHARCODE = require('../../tokenizer').CHARCODE; var IDENT = TYPE.Ident; var STRING = TYPE.String; var COLON = TYPE.Colon; var LEFTSQUAREBRACKET = TYPE.LeftSquareBracket; var RIGHTSQUAREBRACKET = TYPE.RightSquareBracket; var DOLLARSIGN = CHARCODE.DollarSign; var ASTERISK = CHARCODE.Asterisk; var EQUALSSIGN = CHARCODE.EqualsSign; var CIRCUMFLEXACCENT = CHARCODE.CircumflexAccent; var VERTICALLINE = CHARCODE.VerticalLine; var TILDE = CHARCODE.Tilde; function getAttributeName() { if (this.scanner.eof) { this.error('Unexpected end of input'); } var start = this.scanner.tokenStart; var expectIdent = false; var checkColon = true; if (this.scanner.isDelim(ASTERISK)) { expectIdent = true; checkColon = false; this.scanner.next(); } else if (!this.scanner.isDelim(VERTICALLINE)) { this.eat(IDENT); } if (this.scanner.isDelim(VERTICALLINE)) { if (this.scanner.source.charCodeAt(this.scanner.tokenStart + 1) !== EQUALSSIGN) { this.scanner.next(); this.eat(IDENT); } else if (expectIdent) { this.error('Identifier is expected', this.scanner.tokenEnd); } } else if (expectIdent) { this.error('Vertical line is expected'); } if (checkColon && this.scanner.tokenType === COLON) { this.scanner.next(); this.eat(IDENT); } return { type: 'Identifier', loc: this.getLocation(start, this.scanner.tokenStart), name: this.scanner.substrToCursor(start) }; } function getOperator() { var start = this.scanner.tokenStart; var code = this.scanner.source.charCodeAt(start); if (code !== EQUALSSIGN && // = code !== TILDE && // ~= code !== CIRCUMFLEXACCENT && // ^= code !== DOLLARSIGN && // $= code !== ASTERISK && // *= code !== VERTICALLINE // |= ) { this.error('Attribute selector (=, ~=, ^=, $=, *=, |=) is expected'); } this.scanner.next(); if (code !== EQUALSSIGN) { if (!this.scanner.isDelim(EQUALSSIGN)) { this.error('Equal sign is expected'); } this.scanner.next(); } return this.scanner.substrToCursor(start); } // '[' ']' // '[' [ | ] ? ']' module.exports = { name: 'AttributeSelector', structure: { name: 'Identifier', matcher: [String, null], value: ['String', 'Identifier', null], flags: [String, null] }, parse: function() { var start = this.scanner.tokenStart; var name; var matcher = null; var value = null; var flags = null; this.eat(LEFTSQUAREBRACKET); this.scanner.skipSC(); name = getAttributeName.call(this); this.scanner.skipSC(); if (this.scanner.tokenType !== RIGHTSQUAREBRACKET) { // avoid case `[name i]` if (this.scanner.tokenType !== IDENT) { matcher = getOperator.call(this); this.scanner.skipSC(); value = this.scanner.tokenType === STRING ? this.String() : this.Identifier(); this.scanner.skipSC(); } // attribute flags if (this.scanner.tokenType === IDENT) { flags = this.scanner.getTokenValue(); this.scanner.next(); this.scanner.skipSC(); } } this.eat(RIGHTSQUAREBRACKET); return { type: 'AttributeSelector', loc: this.getLocation(start, this.scanner.tokenStart), name: name, matcher: matcher, value: value, flags: flags }; }, generate: function(node) { var flagsPrefix = ' '; this.chunk('['); this.node(node.name); if (node.matcher !== null) { this.chunk(node.matcher); if (node.value !== null) { this.node(node.value); // space between string and flags is not required if (node.value.type === 'String') { flagsPrefix = ''; } } } if (node.flags !== null) { this.chunk(flagsPrefix); this.chunk(node.flags); } this.chunk(']'); } };