The Tor Browser: browser/devtools/sourceeditor/css-tokenizer.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/css-tokenizer.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/css-tokenizer.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /**
  * This file is taken from the below mentioned url and is under CC0 license.
  * https://github.com/tabatkins/css-parser/blob/master/tokenizer.js
  * Please retain this comment while updating this file from upstream.
  */
 (function (root, factory) {
     // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,
     // Rhino, and plain browser loading.
     if (typeof define === 'function' && define.amd) {
         define(['exports'], factory);
     } else if (typeof exports !== 'undefined') {
         factory(exports);
     } else {
         factory(root);
     }
 }(this, function (exports) {
 var between = function (num, first, last) { return num >= first && num <= last; }
 function digit(code) { return between(code, 0x30,0x39); }
 function hexdigit(code) { return digit(code) || between(code, 0x41,0x46) || between(code, 0x61,0x66); }
 function uppercaseletter(code) { return between(code, 0x41,0x5a); }
 function lowercaseletter(code) { return between(code, 0x61,0x7a); }
 function letter(code) { return uppercaseletter(code) || lowercaseletter(code); }
 function nonascii(code) { return code >= 0xa0; }
 function namestartchar(code) { return letter(code) || nonascii(code) || code == 0x5f; }
 function namechar(code) { return namestartchar(code) || digit(code) || code == 0x2d; }
 function nonprintable(code) { return between(code, 0,8) || between(code, 0xe,0x1f) || between(code, 0x7f,0x9f); }
 function newline(code) { return code == 0xa || code == 0xc; }
 function whitespace(code) { return newline(code) || code == 9 || code == 0x20; }
 function badescape(code) { return newline(code) || isNaN(code); }
 // Note: I'm not yet acting smart enough to actually handle astral characters.
 var maximumallowedcodepoint = 0x10ffff;
 function tokenize(str, options) {
   if(options == undefined) options = {transformFunctionWhitespace:false, scientificNotation:false};
   var i = -1;
   var tokens = [];
   var state = "data";
   var code;
   var currtoken;
   // Line number information.
   var line = 0;
   var column = 0;
   // The only use of lastLineLength is in reconsume().
   var lastLineLength = 0;
   var incrLineno = function() {
     line += 1;
     lastLineLength = column;
     column = 0;
   };
   var locStart = {line:line, column:column};
   var next = function(num) { if(num === undefined) num = 1; return str.charCodeAt(i+num); };
   var consume = function(num) {
     if(num === undefined)
       num = 1;
     i += num;
     code = str.charCodeAt(i);
     if (newline(code)) incrLineno();
     else column += num;
     //console.log('Consume '+i+' '+String.fromCharCode(code) + ' 0x' + code.toString(16));
     return true;
   };
   var reconsume = function() {
     i -= 1;
     if (newline(code)) {
       line -= 1;
       column = lastLineLength;
     } else {
       column -= 1;
     }
     locStart.line = line;
     locStart.column = column;
     return true;
   };
   var eof = function() { return i >= str.length; };
   var donothing = function() {};
   var emit = function(token) {
     if(token) {
       token.finish();
     } else {
       token = currtoken.finish();
     }
     if (options.loc === true) {
       token.loc = {};
       token.loc.start = {line:locStart.line, column:locStart.column};
       locStart = {line: line, column: column};
       token.loc.end = locStart;
     }
     tokens.push(token);
     //console.log('Emitting ' + token);
     currtoken = undefined;
     return true;
   };
   var create = function(token) { currtoken = token; return true; };
   var parseerror = function() { console.log("Parse error at index " + i + ", processing codepoint 0x" + code.toString(16) + " in state " + state + ".");return true; };
   var switchto = function(newstate) {
     state = newstate;
     //console.log('Switching to ' + state);
     return true;
   };
   var consumeEscape = function() {
     // Assume the the current character is the \
     consume();
     if(hexdigit(code)) {
       // Consume 1-6 hex digits
       var digits = [];
       for(var total = 0; total < 6; total++) {
         if(hexdigit(code)) {
           digits.push(code);
           consume();
         } else { break; }
       }
       var value = parseInt(digits.map(String.fromCharCode).join(''), 16);
       if( value > maximumallowedcodepoint ) value = 0xfffd;
       // If the current char is whitespace, cool, we'll just eat it.
       // Otherwise, put it back.
       if(!whitespace(code)) reconsume();
       return value;
     } else {
       return code;
     }
   };
   for(;;) {
     if(i > str.length*2) return "I'm infinite-looping!";
     consume();
     switch(state) {
     case "data":
       if(whitespace(code)) {
         emit(new WhitespaceToken);
         while(whitespace(next())) consume();
       }
       else if(code == 0x22) switchto("double-quote-string");
       else if(code == 0x23) switchto("hash");
       else if(code == 0x27) switchto("single-quote-string");
       else if(code == 0x28) emit(new OpenParenToken);
       else if(code == 0x29) emit(new CloseParenToken);
       else if(code == 0x2b) {
         if(digit(next()) || (next() == 0x2e && digit(next(2)))) switchto("number") && reconsume();
         else emit(new DelimToken(code));
       }
       else if(code == 0x2d) {
         if(next(1) == 0x2d && next(2) == 0x3e) consume(2) && emit(new CDCToken);
         else if(digit(next()) || (next(1) == 0x2e && digit(next(2)))) switchto("number") && reconsume();
         else if(namestartchar(next())) switchto("identifier") && reconsume();
         else emit(new DelimToken(code));
       }
       else if(code == 0x2e) {
         if(digit(next())) switchto("number") && reconsume();
         else emit(new DelimToken(code));
       }
       else if(code == 0x2f) {
         if(next() == 0x2a) switchto("comment");
         else emit(new DelimToken(code));
       }
       else if(code == 0x3a) emit(new ColonToken);
       else if(code == 0x3b) emit(new SemicolonToken);
       else if(code == 0x3c) {
         if(next(1) == 0x21 && next(2) == 0x2d && next(3) == 0x2d) consume(3) && emit(new CDOToken);
         else emit(new DelimToken(code));
       }
       else if(code == 0x40) switchto("at-keyword");
       else if(code == 0x5b) emit(new OpenSquareToken);
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit(new DelimToken(code));
         else switchto("identifier") && reconsume();
       }
       else if(code == 0x5d) emit(new CloseSquareToken);
       else if(code == 0x7b) emit(new OpenCurlyToken);
       else if(code == 0x7d) emit(new CloseCurlyToken);
       else if(digit(code)) switchto("number") && reconsume();
       else if(code == 0x55 || code == 0x75) {
         if(next(1) == 0x2b && hexdigit(next(2))) consume() && switchto("unicode-range");
         else if((next(1) == 0x52 || next(1) == 0x72) && (next(2) == 0x4c || next(2) == 0x6c) && (next(3) == 0x28)) consume(3) && switchto("url");
         else switchto("identifier") && reconsume();
       }
       else if(namestartchar(code)) switchto("identifier") && reconsume();
       else if(eof()) { emit(new EOFToken); return tokens; }
       else emit(new DelimToken(code));
       break;
     case "double-quote-string":
       if(currtoken == undefined) create(new StringToken);
       if(code == 0x22) emit() && switchto("data");
       else if(eof()) parseerror() && emit() && switchto("data");
       else if(newline(code)) parseerror() && emit(new BadStringToken) && switchto("data") && reconsume();
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit(new BadStringToken) && switchto("data");
         else if(newline(next())) consume();
         else currtoken.append(consumeEscape());
       }
       else currtoken.append(code);
       break;
     case "single-quote-string":
       if(currtoken == undefined) create(new StringToken);
       if(code == 0x27) emit() && switchto("data");
       else if(eof()) parseerror() && emit() && switchto("data");
       else if(newline(code)) parseerror() && emit(new BadStringToken) && switchto("data") && reconsume();
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit(new BadStringToken) && switchto("data");
         else if(newline(next())) consume();
         else currtoken.append(consumeEscape());
       }
       else currtoken.append(code);
       break;
     case "hash":
       if(namechar(code)) create(new HashToken(code)) && switchto("hash-rest");
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit(new DelimToken(0x23)) && switchto("data") && reconsume();
         else create(new HashToken(consumeEscape())) && switchto('hash-rest');
       }
       else emit(new DelimToken(0x23)) && switchto('data') && reconsume();
       break;
     case "hash-rest":
       if(namechar(code)) currtoken.append(code);
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit(new DelimToken(0x23)) && switchto("data") && reconsume();
         else currtoken.append(consumeEscape());
       }
       else emit() && switchto('data') && reconsume();
       break;
     case "comment":
       if(code == 0x2a) {
         if(next() == 0x2f) consume() && switchto('data');
         else donothing();
       }
       else if(eof()) parseerror() && switchto('data') && reconsume();
       else donothing();
       break;
     case "at-keyword":
       if(code == 0x2d) {
         if(namestartchar(next())) consume() && create(new AtKeywordToken([0x40,code])) && switchto('at-keyword-rest');
         else emit(new DelimToken(0x40)) && switchto('data') && reconsume();
       }
       else if(namestartchar(code)) create(new AtKeywordToken(code)) && switchto('at-keyword-rest');
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit(new DelimToken(0x23)) && switchto("data") && reconsume();
         else create(new AtKeywordToken(consumeEscape())) && switchto('at-keyword-rest');
       }
       else emit(new DelimToken(0x40)) && switchto('data') && reconsume();
       break;
     case "at-keyword-rest":
       if(namechar(code)) currtoken.append(code);
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit() && switchto("data") && reconsume();
         else currtoken.append(consumeEscape());
       }
       else emit() && switchto('data') && reconsume();
       break;
     case "identifier":
       if(code == 0x2d) {
         if(namestartchar(next())) create(new IdentifierToken(code)) && switchto('identifier-rest');
         else switchto('data') && reconsume();
       }
       else if(namestartchar(code)) create(new IdentifierToken(code)) && switchto('identifier-rest');
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && switchto("data") && reconsume();
         else create(new IdentifierToken(consumeEscape())) && switchto('identifier-rest');
       }
       else switchto('data') && reconsume();
       break;
     case "identifier-rest":
       if(namechar(code)) currtoken.append(code);
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit() && switchto("data") && reconsume();
         else currtoken.append(consumeEscape());
       }
       else if(code == 0x28) emit(new FunctionToken(currtoken)) && switchto('data');
       else if(whitespace(code) && options.transformFunctionWhitespace) switchto('transform-function-whitespace');
       else emit() && switchto('data') && reconsume();
       break;
     case "transform-function-whitespace":
       if(whitespace(code)) donothing();
       else if(code == 0x28) emit(new FunctionToken(currtoken)) && switchto('data');
       else emit() && switchto('data') && reconsume();
       break;
     case "number":
       create(new NumberToken());
       if(code == 0x2d) {
         if(digit(next())) consume() && currtoken.append([0x2d,code]) && switchto('number-rest');
         else if(next(1) == 0x2e && digit(next(2))) consume(2) && currtoken.append([0x2d,0x2e,code]) && switchto('number-fraction');
         else switchto('data') && reconsume();
       }
       else if(code == 0x2b) {
         if(digit(next())) consume() && currtoken.append([0x2b,code]) && switchto('number-rest');
         else if(next(1) == 0x2e && digit(next(2))) consume(2) && currtoken.append([0x2b,0x2e,code]) && switchto('number-fraction');
         else switchto('data') && reconsume();
       }
       else if(digit(code)) currtoken.append(code) && switchto('number-rest');
       else if(code == 0x2e) {
         if(digit(next())) consume() && currtoken.append([0x2e,code]) && switchto('number-fraction');
         else switchto('data') && reconsume();
       }
       else switchto('data') && reconsume();
       break;
     case "number-rest":
       if(digit(code)) currtoken.append(code);
       else if(code == 0x2e) {
         if(digit(next())) consume() && currtoken.append([0x2e,code]) && switchto('number-fraction');
         else emit() && switchto('data') && reconsume();
       }
       else if(code == 0x25) emit(new PercentageToken(currtoken)) && switchto('data') && reconsume();
       else if(code == 0x45 || code == 0x65) {
         if(!options.scientificNotation) create(new DimensionToken(currtoken,code)) && switchto('dimension');
         else if(digit(next())) consume() && currtoken.append([0x25,code]) && switchto('sci-notation');
         else if((next(1) == 0x2b || next(1) == 0x2d) && digit(next(2))) currtoken.append([0x25,next(1),next(2)]) && consume(2) && switchto('sci-notation');
         else create(new DimensionToken(currtoken,code)) && switchto('dimension');
       }
       else if(code == 0x2d) {
         if(namestartchar(next())) consume() && create(new DimensionToken(currtoken,[0x2d,code])) && switchto('dimension');
         else if(next(1) == 0x5c && badescape(next(2))) parseerror() && emit() && switchto('data') && reconsume();
         else if(next(1) == 0x5c) consume() && create(new DimensionToken(currtoken, [0x2d,consumeEscape()])) && switchto('dimension');
         else emit() && switchto('data') && reconsume();
       }
       else if(namestartchar(code)) create(new DimensionToken(currtoken, code)) && switchto('dimension');
       else if(code == 0x5c) {
         if(badescape(next)) emit() && switchto('data') && reconsume();
         else create(new DimensionToken(currtoken,consumeEscape)) && switchto('dimension');
       }
       else emit() && switchto('data') && reconsume();
       break;
     case "number-fraction":
       currtoken.type = "number";
       if(digit(code)) currtoken.append(code);
       else if(code == 0x2e) emit() && switchto('data') && reconsume();
       else if(code == 0x25) emit(new PercentageToken(currtoken)) && switchto('data') && reconsume();
       else if(code == 0x45 || code == 0x65) {
         if(!options.scientificNotation) create(new DimensionToken(currtoken,code)) && switchto('dimension');
         else if(digit(next())) consume() && currtoken.append([0x25,code]) && switchto('sci-notation');
         else if((next(1) == 0x2b || next(1) == 0x2d) && digit(next(2))) currtoken.append([0x25,next(1),next(2)]) && consume(2) && switchto('sci-notation');
         else create(new DimensionToken(currtoken,code)) && switchto('dimension');
       }
       else if(code == 0x2d) {
         if(namestartchar(next())) consume() && create(new DimensionToken(currtoken,[0x2d,code])) && switchto('dimension');
         else if(next(1) == 0x5c && badescape(next(2))) parseerror() && emit() && switchto('data') && reconsume();
         else if(next(1) == 0x5c) consume() && create(new DimensionToken(currtoken, [0x2d,consumeEscape()])) && switchto('dimension');
         else emit() && switchto('data') && reconsume();
       }
       else if(namestartchar(code)) create(new DimensionToken(currtoken, code)) && switchto('dimension');
       else if(code == 0x5c) {
         if(badescape(next)) emit() && switchto('data') && reconsume();
         else create(new DimensionToken(currtoken,consumeEscape)) && switchto('dimension');
       }
       else emit() && switchto('data') && reconsume();
       break;
     case "dimension":
       if(namechar(code)) currtoken.append(code);
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && emit() && switchto('data') && reconsume();
         else currtoken.append(consumeEscape());
       }
       else emit() && switchto('data') && reconsume();
       break;
     case "sci-notation":
       if(digit(code)) currtoken.append(code);
       else emit() && switchto('data') && reconsume();
       break;
     case "url":
       if(code == 0x22) switchto('url-double-quote');
       else if(code == 0x27) switchto('url-single-quote');
       else if(code == 0x29) emit(new URLToken) && switchto('data');
       else if(whitespace(code)) donothing();
       else switchto('url-unquoted') && reconsume();
       break;
     case "url-double-quote":
       if(currtoken == undefined) create(new URLToken);
       if(code == 0x22) switchto('url-end');
       else if(newline(code)) parseerror() && switchto('bad-url');
       else if(code == 0x5c) {
         if(newline(next())) consume();
         else if(badescape(next())) parseerror() && emit(new BadURLToken) && switchto('data') && reconsume();
         else currtoken.append(consumeEscape());
       }
       else currtoken.append(code);
       break;
     case "url-single-quote":
       if(currtoken == undefined) create(new URLToken);
       if(code == 0x27) switchto('url-end');
       else if(newline(code)) parseerror() && switchto('bad-url');
       else if(code == 0x5c) {
         if(newline(next())) consume();
         else if(badescape(next())) parseerror() && emit(new BadURLToken) && switchto('data') && reconsume();
         else currtoken.append(consumeEscape());
       }
       else currtoken.append(code);
       break;
     case "url-end":
       if(whitespace(code)) donothing();
       else if(code == 0x29) emit() && switchto('data');
       else parseerror() && switchto('bad-url') && reconsume();
       break;
     case "url-unquoted":
       if(currtoken == undefined) create(new URLToken);
       if(whitespace(code)) switchto('url-end');
       else if(code == 0x29) emit() && switchto('data');
       else if(code == 0x22 || code == 0x27 || code == 0x28 || nonprintable(code)) parseerror() && switchto('bad-url');
       else if(code == 0x5c) {
         if(badescape(next())) parseerror() && switchto('bad-url');
         else currtoken.append(consumeEscape());
       }
       else currtoken.append(code);
       break;
     case "bad-url":
       if(code == 0x29) emit(new BadURLToken) && switchto('data');
       else if(code == 0x5c) {
         if(badescape(next())) donothing();
         else consumeEscape()
       }
       else donothing();
       break;
     case "unicode-range":
       // We already know that the current code is a hexdigit.
       var start = [code], end = [code];
       for(var total = 1; total < 6; total++) {
         if(hexdigit(next())) {
           consume();
           start.push(code);
           end.push(code);
         }
         else break;
       }
       if(next() == 0x3f) {
         for(;total < 6; total++) {
           if(next() == 0x3f) {
             consume();
             start.push("0".charCodeAt(0));
             end.push("f".charCodeAt(0));
           }
           else break;
         }
         emit(new UnicodeRangeToken(start,end)) && switchto('data');
       }
       else if(next(1) == 0x2d && hexdigit(next(2))) {
         consume();
         consume();
         end = [code];
         for(var total = 1; total < 6; total++) {
           if(hexdigit(next())) {
             consume();
             end.push(code);
           }
           else break;
         }
         emit(new UnicodeRangeToken(start,end)) && switchto('data');
       }
       else emit(new UnicodeRangeToken(start)) && switchto('data');
       break;
     default:
       console.log("Unknown state '" + state + "'");
     }
   }
 }
 function stringFromCodeArray(arr) {
   return String.fromCharCode.apply(null,arr.filter(function(e){return e;}));
 }
 function CSSParserToken(options) { return this; }
 CSSParserToken.prototype.finish = function() { return this; }
 CSSParserToken.prototype.toString = function() { return this.tokenType; }
 CSSParserToken.prototype.toJSON = function() { return this.toString(); }
 function BadStringToken() { return this; }
 BadStringToken.prototype = new CSSParserToken;
 BadStringToken.prototype.tokenType = "BADSTRING";
 function BadURLToken() { return this; }
 BadURLToken.prototype = new CSSParserToken;
 BadURLToken.prototype.tokenType = "BADURL";
 function WhitespaceToken() { return this; }
 WhitespaceToken.prototype = new CSSParserToken;
 WhitespaceToken.prototype.tokenType = "WHITESPACE";
 WhitespaceToken.prototype.toString = function() { return "WS"; }
 function CDOToken() { return this; }
 CDOToken.prototype = new CSSParserToken;
 CDOToken.prototype.tokenType = "CDO";
 function CDCToken() { return this; }
 CDCToken.prototype = new CSSParserToken;
 CDCToken.prototype.tokenType = "CDC";
 function ColonToken() { return this; }
 ColonToken.prototype = new CSSParserToken;
 ColonToken.prototype.tokenType = ":";
 function SemicolonToken() { return this; }
 SemicolonToken.prototype = new CSSParserToken;
 SemicolonToken.prototype.tokenType = ";";
 function OpenCurlyToken() { return this; }
 OpenCurlyToken.prototype = new CSSParserToken;
 OpenCurlyToken.prototype.tokenType = "{";
 function CloseCurlyToken() { return this; }
 CloseCurlyToken.prototype = new CSSParserToken;
 CloseCurlyToken.prototype.tokenType = "}";
 function OpenSquareToken() { return this; }
 OpenSquareToken.prototype = new CSSParserToken;
 OpenSquareToken.prototype.tokenType = "[";
 function CloseSquareToken() { return this; }
 CloseSquareToken.prototype = new CSSParserToken;
 CloseSquareToken.prototype.tokenType = "]";
 function OpenParenToken() { return this; }
 OpenParenToken.prototype = new CSSParserToken;
 OpenParenToken.prototype.tokenType = "(";
 function CloseParenToken() { return this; }
 CloseParenToken.prototype = new CSSParserToken;
 CloseParenToken.prototype.tokenType = ")";
 function EOFToken() { return this; }
 EOFToken.prototype = new CSSParserToken;
 EOFToken.prototype.tokenType = "EOF";
 function DelimToken(code) {
   this.value = String.fromCharCode(code);
   return this;
 }
 DelimToken.prototype = new CSSParserToken;
 DelimToken.prototype.tokenType = "DELIM";
 DelimToken.prototype.toString = function() { return "DELIM("+this.value+")"; }
 function StringValuedToken() { return this; }
 StringValuedToken.prototype = new CSSParserToken;
 StringValuedToken.prototype.append = function(val) {
   if(val instanceof Array) {
     for(var i = 0; i < val.length; i++) {
       this.value.push(val[i]);
     }
   } else {
     this.value.push(val);
   }
   return true;
 }
 StringValuedToken.prototype.finish = function() {
   this.value = stringFromCodeArray(this.value);
   return this;
 }
 function IdentifierToken(val) {
   this.value = [];
   this.append(val);
 }
 IdentifierToken.prototype = new StringValuedToken;
 IdentifierToken.prototype.tokenType = "IDENT";
 IdentifierToken.prototype.toString = function() { return "IDENT("+this.value+")"; }
 function FunctionToken(val) {
   // These are always constructed by passing an IdentifierToken
   this.value = val.finish().value;
 }
 FunctionToken.prototype = new CSSParserToken;
 FunctionToken.prototype.tokenType = "FUNCTION";
 FunctionToken.prototype.toString = function() { return "FUNCTION("+this.value+")"; }
 function AtKeywordToken(val) {
   this.value = [];
   this.append(val);
 }
 AtKeywordToken.prototype = new StringValuedToken;
 AtKeywordToken.prototype.tokenType = "AT-KEYWORD";
 AtKeywordToken.prototype.toString = function() { return "AT("+this.value+")"; }
 function HashToken(val) {
   this.value = [];
   this.append(val);
 }
 HashToken.prototype = new StringValuedToken;
 HashToken.prototype.tokenType = "HASH";
 HashToken.prototype.toString = function() { return "HASH("+this.value+")"; }
 function StringToken(val) {
   this.value = [];
   this.append(val);
 }
 StringToken.prototype = new StringValuedToken;
 StringToken.prototype.tokenType = "STRING";
 StringToken.prototype.toString = function() { return "\""+this.value+"\""; }
 function URLToken(val) {
   this.value = [];
   this.append(val);
 }
 URLToken.prototype = new StringValuedToken;
 URLToken.prototype.tokenType = "URL";
 URLToken.prototype.toString = function() { return "URL("+this.value+")"; }
 function NumberToken(val) {
   this.value = [];
   this.append(val);
   this.type = "integer";
 }
 NumberToken.prototype = new StringValuedToken;
 NumberToken.prototype.tokenType = "NUMBER";
 NumberToken.prototype.toString = function() {
   if(this.type == "integer")
     return "INT("+this.value+")";
   return "NUMBER("+this.value+")";
 }
 NumberToken.prototype.finish = function() {
   this.repr = stringFromCodeArray(this.value);
   this.value = this.repr * 1;
   if(Math.abs(this.value) % 1 != 0) this.type = "number";
   return this;
 }
 function PercentageToken(val) {
   // These are always created by passing a NumberToken as val
   val.finish();
   this.value = val.value;
   this.repr = val.repr;
 }
 PercentageToken.prototype = new CSSParserToken;
 PercentageToken.prototype.tokenType = "PERCENTAGE";
 PercentageToken.prototype.toString = function() { return "PERCENTAGE("+this.value+")"; }
 function DimensionToken(val,unit) {
   // These are always created by passing a NumberToken as the val
   val.finish();
   this.num = val.value;
   this.unit = [];
   this.repr = val.repr;
   this.append(unit);
 }
 DimensionToken.prototype = new CSSParserToken;
 DimensionToken.prototype.tokenType = "DIMENSION";
 DimensionToken.prototype.toString = function() { return "DIM("+this.num+","+this.unit+")"; }
 DimensionToken.prototype.append = function(val) {
   if(val instanceof Array) {
     for(var i = 0; i < val.length; i++) {
       this.unit.push(val[i]);
     }
   } else {
     this.unit.push(val);
   }
   return true;
 }
 DimensionToken.prototype.finish = function() {
   this.unit = stringFromCodeArray(this.unit);
   this.repr += this.unit;
   return this;
 }
 function UnicodeRangeToken(start,end) {
   // start and end are array of char codes, completely finished
   start = parseInt(stringFromCodeArray(start),16);
   if(end === undefined) end = start + 1;
   else end = parseInt(stringFromCodeArray(end),16);
   if(start > maximumallowedcodepoint) end = start;
   if(end < start) end = start;
   if(end > maximumallowedcodepoint) end = maximumallowedcodepoint;
   this.start = start;
   this.end = end;
   return this;
 }
 UnicodeRangeToken.prototype = new CSSParserToken;
 UnicodeRangeToken.prototype.tokenType = "UNICODE-RANGE";
 UnicodeRangeToken.prototype.toString = function() {
   if(this.start+1 == this.end)
     return "UNICODE-RANGE("+this.start.toString(16).toUpperCase()+")";
   if(this.start < this.end)
     return "UNICODE-RANGE("+this.start.toString(16).toUpperCase()+"-"+this.end.toString(16).toUpperCase()+")";
   return "UNICODE-RANGE()";
 }
 UnicodeRangeToken.prototype.contains = function(code) {
   return code >= this.start && code < this.end;
 }
 // Exportation.
 // TODO: also export the various tokens objects?
 module.exports = tokenize;
 }));