DevTools: Implement CSS pretty-printing

Source/devtools/front_end/JavaScriptFormatter.js

Index: Source/devtools/front_end/JavaScriptFormatter.js
diff --git a/Source/devtools/front_end/JavaScriptFormatter.js b/Source/devtools/front_end/JavaScriptFormatter.js
index 9536289dd7376b40add3eb58fba400b490f3a8ad..ba5296731604d6513f2ad00e854a852e6159b833 100644
--- a/Source/devtools/front_end/JavaScriptFormatter.js
+++ b/Source/devtools/front_end/JavaScriptFormatter.js
@@ -28,207 +28,12 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-function FormattedContentBuilder(content, mapping, originalOffset, formattedOffset, indentString)
-{
-    this._originalContent = content;
-    this._originalOffset = originalOffset;
-    this._lastOriginalPosition = 0;
-
-    this._formattedContent = [];
-    this._formattedContentLength = 0;
-    this._formattedOffset = formattedOffset;
-    this._lastFormattedPosition = 0;
-
-    this._mapping = mapping;
-
-    this._lineNumber = 0;
-    this._nestingLevel = 0;
-    this._indentString = indentString;
-    this._cachedIndents = {};
-}
-
-FormattedContentBuilder.prototype = {
-    addToken: function(token)
-    {
-        for (var i = 0; i < token.comments_before.length; ++i)
-            this._addComment(token.comments_before[i]);
-
-        while (this._lineNumber < token.line) {
-            this._addText("\n");
-            this._addIndent();
-            this._needNewLine = false;
-            this._lineNumber += 1;
-        }
-
-        if (this._needNewLine) {
-            this._addText("\n");
-            this._addIndent();
-            this._needNewLine = false;
-        }
-
-        this._addMappingIfNeeded(token.pos);
-        this._addText(this._originalContent.substring(token.pos, token.endPos));
-        this._lineNumber = token.endLine;
-    },
-
-    addSpace: function()
-    {
-        this._addText(" ");
-    },
-
-    addNewLine: function()
-    {
-        this._needNewLine = true;
-    },
-
-    increaseNestingLevel: function()
-    {
-        this._nestingLevel += 1;
-    },
-
-    decreaseNestingLevel: function()
-    {
-        this._nestingLevel -= 1;
-    },
-
-    content: function()
-    {
-        return this._formattedContent.join("");
-    },
-
-    mapping: function()
-    {
-        return { original: this._originalPositions, formatted: this._formattedPositions };
-    },
-
-    _addIndent: function()
-    {
-        if (this._cachedIndents[this._nestingLevel]) {
-            this._addText(this._cachedIndents[this._nestingLevel]);
-            return;
-        }
-
-        var fullIndent = "";
-        for (var i = 0; i < this._nestingLevel; ++i)
-            fullIndent += this._indentString;
-        this._addText(fullIndent);
-
-        // Cache a maximum of 20 nesting level indents.
-        if (this._nestingLevel <= 20)
-            this._cachedIndents[this._nestingLevel] = fullIndent;
-    },
-
-    _addComment: function(comment)
-    {
-        if (this._lineNumber < comment.line) {
-            for (var j = this._lineNumber; j < comment.line; ++j)
-                this._addText("\n");
-            this._lineNumber = comment.line;
-            this._needNewLine = false;
-            this._addIndent();
-        } else
-            this.addSpace();
-
-        this._addMappingIfNeeded(comment.pos);
-        if (comment.type === "comment1")
-            this._addText("//");
-        else
-            this._addText("/*");
-
-        this._addText(comment.value);
-
-        if (comment.type !== "comment1") {
-            this._addText("*/");
-            var position;
-            while ((position = comment.value.indexOf("\n", position + 1)) !== -1)
-                this._lineNumber += 1;
-        }
-    },
-
-    _addText: function(text)
-    {
-        this._formattedContent.push(text);
-        this._formattedContentLength += text.length;
-    },
-
-    _addMappingIfNeeded: function(originalPosition)
-    {
-        if (originalPosition - this._lastOriginalPosition === this._formattedContentLength - this._lastFormattedPosition)
-            return;
-        this._mapping.original.push(this._originalOffset + originalPosition);
-        this._lastOriginalPosition = originalPosition;
-        this._mapping.formatted.push(this._formattedOffset + this._formattedContentLength);
-        this._lastFormattedPosition = this._formattedContentLength;
-    }
-}
-
-var tokens = [
-    ["EOS"],
-    ["LPAREN", "("], ["RPAREN", ")"], ["LBRACK", "["], ["RBRACK", "]"], ["LBRACE", "{"], ["RBRACE", "}"], ["COLON", ":"], ["SEMICOLON", ";"], ["PERIOD", "."], ["CONDITIONAL", "?"],
-    ["INC", "++"], ["DEC", "--"],
-    ["ASSIGN", "="], ["ASSIGN_BIT_OR", "|="], ["ASSIGN_BIT_XOR", "^="], ["ASSIGN_BIT_AND", "&="], ["ASSIGN_SHL", "<<="], ["ASSIGN_SAR", ">>="], ["ASSIGN_SHR", ">>>="],
-    ["ASSIGN_ADD", "+="], ["ASSIGN_SUB", "-="], ["ASSIGN_MUL", "*="], ["ASSIGN_DIV", "/="], ["ASSIGN_MOD", "%="],
-    ["COMMA", ","], ["OR", "||"], ["AND", "&&"], ["BIT_OR", "|"], ["BIT_XOR", "^"], ["BIT_AND", "&"], ["SHL", "<<"], ["SAR", ">>"], ["SHR", ">>>"],
-    ["ADD", "+"], ["SUB", "-"], ["MUL", "*"], ["DIV", "/"], ["MOD", "%"],
-    ["EQ", "=="], ["NE", "!="], ["EQ_STRICT", "==="], ["NE_STRICT", "!=="], ["LT", "<"], ["GT", ">"], ["LTE", "<="], ["GTE", ">="],
-    ["INSTANCEOF", "instanceof"], ["IN", "in"], ["NOT", "!"], ["BIT_NOT", "~"], ["DELETE", "delete"], ["TYPEOF", "typeof"], ["VOID", "void"],
-    ["BREAK", "break"], ["CASE", "case"], ["CATCH", "catch"], ["CONTINUE", "continue"], ["DEBUGGER", "debugger"], ["DEFAULT", "default"], ["DO", "do"], ["ELSE", "else"], ["FINALLY", "finally"],
-    ["FOR", "for"], ["FUNCTION", "function"], ["IF", "if"], ["NEW", "new"], ["RETURN", "return"], ["SWITCH", "switch"], ["THIS", "this"], ["THROW", "throw"], ["TRY", "try"], ["VAR", "var"],
-    ["WHILE", "while"], ["WITH", "with"], ["NULL_LITERAL", "null"], ["TRUE_LITERAL", "true"], ["FALSE_LITERAL", "false"], ["NUMBER"], ["STRING"], ["IDENTIFIER"], ["CONST", "const"]
-];
-
-var Tokens = {};
-for (var i = 0; i < tokens.length; ++i)
-    Tokens[tokens[i][0]] = i;
-
-var TokensByValue = {};
-for (var i = 0; i < tokens.length; ++i) {
-    if (tokens[i][1])
-        TokensByValue[tokens[i][1]] = i;
-}
-
-var TokensByType = {
-    "eof": Tokens.EOS,
-    "name": Tokens.IDENTIFIER,
-    "num": Tokens.NUMBER,
-    "regexp": Tokens.DIV,
-    "string": Tokens.STRING
-};
-
-function Tokenizer(content)
-{
-    this._readNextToken = parse.tokenizer(content);
-    this._state = this._readNextToken.context();
-}
-
-Tokenizer.prototype = {
-    content: function()
-    {
-        return this._state.text;
-    },
-
-    next: function(forceRegexp)
-    {
-        var uglifyToken = this._readNextToken(forceRegexp);
-        uglifyToken.endPos = this._state.pos;
-        uglifyToken.endLine = this._state.line;
-        uglifyToken.token = this._convertUglifyToken(uglifyToken);
-        return uglifyToken;
-    },
-
-    _convertUglifyToken: function(uglifyToken)
-    {
-        var token = TokensByType[uglifyToken.type];
-        if (typeof token === "number")
-            return token;
-        token = TokensByValue[uglifyToken.value];
-        if (typeof token === "number")
-            return token;
-        throw "Unknown token type " + uglifyToken.type;
-    }
-}
-
-function JavaScriptFormatter(tokenizer, builder)
+/**
+ * @constructor
+ * @param {FormatterWorker.JavaScriptTokenizer} tokenizer
+ * @param {FormatterWorker.JavaScriptFormattedContentBuilder} builder
+ */
+FormatterWorker.JavaScriptFormatter = function(tokenizer, builder)
 {
     this._tokenizer = tokenizer;
     this._builder = builder;
@@ -236,21 +41,27 @@ function JavaScriptFormatter(tokenizer, builder)
     this._nextToken = this._tokenizer.next();
 }
 
-JavaScriptFormatter.prototype = {
+FormatterWorker.JavaScriptFormatter.prototype = {
     format: function()
     {
-        this._parseSourceElements(Tokens.EOS);
-        this._consume(Tokens.EOS);
+        this._parseSourceElements(FormatterWorker.JavaScriptTokens.EOS);
+        this._consume(FormatterWorker.JavaScriptTokens.EOS);
     },
 
+    /**
+     * @return {string}
+     */
     _peek: function()
     {
         return this._nextToken.token;
     },
 
+    /**
+     * @return {string}
+     */
     _next: function()
     {
-        if (this._token && this._token.token === Tokens.EOS)
+        if (this._token && this._token.token === FormatterWorker.JavaScriptTokens.EOS)
             throw "Unexpected EOS token";
 
         this._builder.addToken(this._nextToken);
@@ -260,6 +71,9 @@ JavaScriptFormatter.prototype = {
         return this._token.token;
     },
 
+    /**
+     * @param {string} token
+     */
     _consume: function(token)
     {
         var next = this._next();
@@ -267,6 +81,9 @@ JavaScriptFormatter.prototype = {
             throw "Unexpected token in consume: expected " + token + ", actual " + next;
     },
 
+    /**
+     * @param {string} token
+     */
     _expect: function(token)
     {
         var next = this._next();
@@ -276,15 +93,21 @@ JavaScriptFormatter.prototype = {
 
     _expectSemicolon: function()
     {
-        if (this._peek() === Tokens.SEMICOLON)
-            this._consume(Tokens.SEMICOLON);
+        if (this._peek() === FormatterWorker.JavaScriptTokens.SEMICOLON)
+            this._consume(FormatterWorker.JavaScriptTokens.SEMICOLON);
     },
 
+    /**
+     * @return {boolean}
+     */
     _hasLineTerminatorBeforeNext: function()
     {
         return this._nextToken.nlb;
     },
 
+    /**
+     * @param {string} endToken
+     */
     _parseSourceElements: function(endToken)
     {
         while (this._peek() !== endToken) {
@@ -295,7 +118,7 @@ JavaScriptFormatter.prototype = {
 
     _parseStatementOrBlock: function()
     {
-        if (this._peek() === Tokens.LBRACE) {
+        if (this._peek() === FormatterWorker.JavaScriptTokens.LBRACE) {
             this._builder.addSpace();
             this._parseBlock();
             return true;
@@ -310,38 +133,38 @@ JavaScriptFormatter.prototype = {
     _parseStatement: function()
     {
         switch (this._peek()) {
-        case Tokens.LBRACE:
+        case FormatterWorker.JavaScriptTokens.LBRACE:
             return this._parseBlock();
-        case Tokens.CONST:
-        case Tokens.VAR:
+        case FormatterWorker.JavaScriptTokens.CONST:
+        case FormatterWorker.JavaScriptTokens.VAR:
             return this._parseVariableStatement();
-        case Tokens.SEMICOLON:
+        case FormatterWorker.JavaScriptTokens.SEMICOLON:
             return this._next();
-        case Tokens.IF:
+        case FormatterWorker.JavaScriptTokens.IF:
             return this._parseIfStatement();
-        case Tokens.DO:
+        case FormatterWorker.JavaScriptTokens.DO:
             return this._parseDoWhileStatement();
-        case Tokens.WHILE:
+        case FormatterWorker.JavaScriptTokens.WHILE:
             return this._parseWhileStatement();
-        case Tokens.FOR:
+        case FormatterWorker.JavaScriptTokens.FOR:
             return this._parseForStatement();
-        case Tokens.CONTINUE:
+        case FormatterWorker.JavaScriptTokens.CONTINUE:
             return this._parseContinueStatement();
-        case Tokens.BREAK:
+        case FormatterWorker.JavaScriptTokens.BREAK:
             return this._parseBreakStatement();
-        case Tokens.RETURN:
+        case FormatterWorker.JavaScriptTokens.RETURN:
             return this._parseReturnStatement();
-        case Tokens.WITH:
+        case FormatterWorker.JavaScriptTokens.WITH:
             return this._parseWithStatement();
-        case Tokens.SWITCH:
+        case FormatterWorker.JavaScriptTokens.SWITCH:
             return this._parseSwitchStatement();
-        case Tokens.THROW:
+        case FormatterWorker.JavaScriptTokens.THROW:
             return this._parseThrowStatement();
-        case Tokens.TRY:
+        case FormatterWorker.JavaScriptTokens.TRY:
             return this._parseTryStatement();
-        case Tokens.FUNCTION:
+        case FormatterWorker.JavaScriptTokens.FUNCTION:
             return this._parseFunctionDeclaration();
-        case Tokens.DEBUGGER:
+        case FormatterWorker.JavaScriptTokens.DEBUGGER:
             return this._parseDebuggerStatement();
         default:
             return this._parseExpressionOrLabelledStatement();
@@ -350,23 +173,23 @@ JavaScriptFormatter.prototype = {
 
     _parseFunctionDeclaration: function()
     {
-        this._expect(Tokens.FUNCTION);
+        this._expect(FormatterWorker.JavaScriptTokens.FUNCTION);
         this._builder.addSpace();
-        this._expect(Tokens.IDENTIFIER);
+        this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
         this._parseFunctionLiteral()
     },
 
     _parseBlock: function()
     {
-        this._expect(Tokens.LBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.LBRACE);
         this._builder.addNewLine();
         this._builder.increaseNestingLevel();
-        while (this._peek() !== Tokens.RBRACE) {
+        while (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACE) {
             this._parseStatement();
             this._builder.addNewLine();
         }
         this._builder.decreaseNestingLevel();
-        this._expect(Tokens.RBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.RBRACE);
     },
 
     _parseVariableStatement: function()
@@ -377,34 +200,34 @@ JavaScriptFormatter.prototype = {
 
     _parseVariableDeclarations: function()
     {
-        if (this._peek() === Tokens.VAR)
-            this._consume(Tokens.VAR);
+        if (this._peek() === FormatterWorker.JavaScriptTokens.VAR)
+            this._consume(FormatterWorker.JavaScriptTokens.VAR);
         else
-            this._consume(Tokens.CONST)
+            this._consume(FormatterWorker.JavaScriptTokens.CONST)
         this._builder.addSpace();
 
         var isFirstVariable = true;
         do {
             if (!isFirstVariable) {
-                this._consume(Tokens.COMMA);
+                this._consume(FormatterWorker.JavaScriptTokens.COMMA);
                 this._builder.addSpace();
             }
             isFirstVariable = false;
-            this._expect(Tokens.IDENTIFIER);
-            if (this._peek() === Tokens.ASSIGN) {
+            this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
+            if (this._peek() === FormatterWorker.JavaScriptTokens.ASSIGN) {
                 this._builder.addSpace();
-                this._consume(Tokens.ASSIGN);
+                this._consume(FormatterWorker.JavaScriptTokens.ASSIGN);
                 this._builder.addSpace();
                 this._parseAssignmentExpression();
             }
-        } while (this._peek() === Tokens.COMMA);
+        } while (this._peek() === FormatterWorker.JavaScriptTokens.COMMA);
     },
 
     _parseExpressionOrLabelledStatement: function()
     {
         this._parseExpression();
-        if (this._peek() === Tokens.COLON) {
-            this._expect(Tokens.COLON);
+        if (this._peek() === FormatterWorker.JavaScriptTokens.COLON) {
+            this._expect(FormatterWorker.JavaScriptTokens.COLON);
             this._builder.addSpace();
             this._parseStatement();
         }
@@ -413,21 +236,21 @@ JavaScriptFormatter.prototype = {
 
     _parseIfStatement: function()
     {
-        this._expect(Tokens.IF);
+        this._expect(FormatterWorker.JavaScriptTokens.IF);
         this._builder.addSpace();
-        this._expect(Tokens.LPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
         this._parseExpression();
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
 
         var isBlock = this._parseStatementOrBlock();
-        if (this._peek() === Tokens.ELSE) {
+        if (this._peek() === FormatterWorker.JavaScriptTokens.ELSE) {
             if (isBlock)
                 this._builder.addSpace();
             else
                 this._builder.addNewLine();
             this._next();
 
-            if (this._peek() === Tokens.IF) {
+            if (this._peek() === FormatterWorker.JavaScriptTokens.IF) {
                 this._builder.addSpace();
                 this._parseStatement();
             } else
@@ -437,31 +260,31 @@ JavaScriptFormatter.prototype = {
 
     _parseContinueStatement: function()
     {
-        this._expect(Tokens.CONTINUE);
+        this._expect(FormatterWorker.JavaScriptTokens.CONTINUE);
         var token = this._peek();
-        if (!this._hasLineTerminatorBeforeNext() && token !== Tokens.SEMICOLON && token !== Tokens.RBRACE && token !== Tokens.EOS) {
+        if (!this._hasLineTerminatorBeforeNext() && token !== FormatterWorker.JavaScriptTokens.SEMICOLON && token !== FormatterWorker.JavaScriptTokens.RBRACE && token !== FormatterWorker.JavaScriptTokens.EOS) {
             this._builder.addSpace();
-            this._expect(Tokens.IDENTIFIER);
+            this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
         }
         this._expectSemicolon();
     },
 
     _parseBreakStatement: function()
     {
-        this._expect(Tokens.BREAK);
+        this._expect(FormatterWorker.JavaScriptTokens.BREAK);
         var token = this._peek();
-        if (!this._hasLineTerminatorBeforeNext() && token !== Tokens.SEMICOLON && token !== Tokens.RBRACE && token !== Tokens.EOS) {
+        if (!this._hasLineTerminatorBeforeNext() && token !== FormatterWorker.JavaScriptTokens.SEMICOLON && token !== FormatterWorker.JavaScriptTokens.RBRACE && token !== FormatterWorker.JavaScriptTokens.EOS) {
             this._builder.addSpace();
-            this._expect(Tokens.IDENTIFIER);
+            this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
         }
         this._expectSemicolon();
     },
 
     _parseReturnStatement: function()
     {
-        this._expect(Tokens.RETURN);
+        this._expect(FormatterWorker.JavaScriptTokens.RETURN);
         var token = this._peek();
-        if (!this._hasLineTerminatorBeforeNext() && token !== Tokens.SEMICOLON && token !== Tokens.RBRACE && token !== Tokens.EOS) {
+        if (!this._hasLineTerminatorBeforeNext() && token !== FormatterWorker.JavaScriptTokens.SEMICOLON && token !== FormatterWorker.JavaScriptTokens.RBRACE && token !== FormatterWorker.JavaScriptTokens.EOS) {
             this._builder.addSpace();
             this._parseExpression();
         }
@@ -470,27 +293,27 @@ JavaScriptFormatter.prototype = {
 
     _parseWithStatement: function()
     {
-        this._expect(Tokens.WITH);
+        this._expect(FormatterWorker.JavaScriptTokens.WITH);
         this._builder.addSpace();
-        this._expect(Tokens.LPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
         this._parseExpression();
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
         this._parseStatementOrBlock();
     },
 
     _parseCaseClause: function()
     {
-        if (this._peek() === Tokens.CASE) {
-            this._expect(Tokens.CASE);
+        if (this._peek() === FormatterWorker.JavaScriptTokens.CASE) {
+            this._expect(FormatterWorker.JavaScriptTokens.CASE);
             this._builder.addSpace();
             this._parseExpression();
         } else
-            this._expect(Tokens.DEFAULT);
-        this._expect(Tokens.COLON);
+            this._expect(FormatterWorker.JavaScriptTokens.DEFAULT);
+        this._expect(FormatterWorker.JavaScriptTokens.COLON);
         this._builder.addNewLine();
 
         this._builder.increaseNestingLevel();
-        while (this._peek() !== Tokens.CASE && this._peek() !== Tokens.DEFAULT && this._peek() !== Tokens.RBRACE) {
+        while (this._peek() !== FormatterWorker.JavaScriptTokens.CASE && this._peek() !== FormatterWorker.JavaScriptTokens.DEFAULT && this._peek() !== FormatterWorker.JavaScriptTokens.RBRACE) {
             this._parseStatement();
             this._builder.addNewLine();
         }
@@ -499,25 +322,25 @@ JavaScriptFormatter.prototype = {
 
     _parseSwitchStatement: function()
     {
-        this._expect(Tokens.SWITCH);
+        this._expect(FormatterWorker.JavaScriptTokens.SWITCH);
         this._builder.addSpace();
-        this._expect(Tokens.LPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
         this._parseExpression();
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
         this._builder.addSpace();
 
-        this._expect(Tokens.LBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.LBRACE);
         this._builder.addNewLine();
         this._builder.increaseNestingLevel();
-        while (this._peek() !== Tokens.RBRACE)
+        while (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACE)
             this._parseCaseClause();
         this._builder.decreaseNestingLevel();
-        this._expect(Tokens.RBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.RBRACE);
     },
 
     _parseThrowStatement: function()
     {
-        this._expect(Tokens.THROW);
+        this._expect(FormatterWorker.JavaScriptTokens.THROW);
         this._builder.addSpace();
         this._parseExpression();
         this._expectSemicolon();
@@ -525,25 +348,25 @@ JavaScriptFormatter.prototype = {
 
     _parseTryStatement: function()
     {
-        this._expect(Tokens.TRY);
+        this._expect(FormatterWorker.JavaScriptTokens.TRY);
         this._builder.addSpace();
         this._parseBlock();
 
         var token = this._peek();
-        if (token === Tokens.CATCH) {
+        if (token === FormatterWorker.JavaScriptTokens.CATCH) {
             this._builder.addSpace();
-            this._consume(Tokens.CATCH);
+            this._consume(FormatterWorker.JavaScriptTokens.CATCH);
             this._builder.addSpace();
-            this._expect(Tokens.LPAREN);
-            this._expect(Tokens.IDENTIFIER);
-            this._expect(Tokens.RPAREN);
+            this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
+            this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
+            this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
             this._builder.addSpace();
             this._parseBlock();
             token = this._peek();
         }
 
-        if (token === Tokens.FINALLY) {
-            this._consume(Tokens.FINALLY);
+        if (token === FormatterWorker.JavaScriptTokens.FINALLY) {
+            this._consume(FormatterWorker.JavaScriptTokens.FINALLY);
             this._builder.addSpace();
             this._parseBlock();
         }
@@ -551,41 +374,41 @@ JavaScriptFormatter.prototype = {
 
     _parseDoWhileStatement: function()
     {
-        this._expect(Tokens.DO);
+        this._expect(FormatterWorker.JavaScriptTokens.DO);
         var isBlock = this._parseStatementOrBlock();
         if (isBlock)
             this._builder.addSpace();
         else
             this._builder.addNewLine();
-        this._expect(Tokens.WHILE);
+        this._expect(FormatterWorker.JavaScriptTokens.WHILE);
         this._builder.addSpace();
-        this._expect(Tokens.LPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
         this._parseExpression();
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
         this._expectSemicolon();
     },
 
     _parseWhileStatement: function()
     {
-        this._expect(Tokens.WHILE);
+        this._expect(FormatterWorker.JavaScriptTokens.WHILE);
         this._builder.addSpace();
-        this._expect(Tokens.LPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
         this._parseExpression();
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
         this._parseStatementOrBlock();
     },
 
     _parseForStatement: function()
     {
-        this._expect(Tokens.FOR);
+        this._expect(FormatterWorker.JavaScriptTokens.FOR);
         this._builder.addSpace();
-        this._expect(Tokens.LPAREN);
-        if (this._peek() !== Tokens.SEMICOLON) {
-            if (this._peek() === Tokens.VAR || this._peek() === Tokens.CONST) {
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
+        if (this._peek() !== FormatterWorker.JavaScriptTokens.SEMICOLON) {
+            if (this._peek() === FormatterWorker.JavaScriptTokens.VAR || this._peek() === FormatterWorker.JavaScriptTokens.CONST) {
                 this._parseVariableDeclarations();
-                if (this._peek() === Tokens.IN) {
+                if (this._peek() === FormatterWorker.JavaScriptTokens.IN) {
                     this._builder.addSpace();
-                    this._consume(Tokens.IN);
+                    this._consume(FormatterWorker.JavaScriptTokens.IN);
                     this._builder.addSpace();
                     this._parseExpression();
                 }
@@ -593,17 +416,17 @@ JavaScriptFormatter.prototype = {
                 this._parseExpression();
         }
 
-        if (this._peek() !== Tokens.RPAREN) {
-            this._expect(Tokens.SEMICOLON);
+        if (this._peek() !== FormatterWorker.JavaScriptTokens.RPAREN) {
+            this._expect(FormatterWorker.JavaScriptTokens.SEMICOLON);
             this._builder.addSpace();
-            if (this._peek() !== Tokens.SEMICOLON)
+            if (this._peek() !== FormatterWorker.JavaScriptTokens.SEMICOLON)
                 this._parseExpression();
-            this._expect(Tokens.SEMICOLON);
+            this._expect(FormatterWorker.JavaScriptTokens.SEMICOLON);
             this._builder.addSpace();
-            if (this._peek() !== Tokens.RPAREN)
+            if (this._peek() !== FormatterWorker.JavaScriptTokens.RPAREN)
                 this._parseExpression();
         }
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
 
         this._parseStatementOrBlock();
     },
@@ -611,8 +434,8 @@ JavaScriptFormatter.prototype = {
     _parseExpression: function()
     {
         this._parseAssignmentExpression();
-        while (this._peek() === Tokens.COMMA) {
-            this._expect(Tokens.COMMA);
+        while (this._peek() === FormatterWorker.JavaScriptTokens.COMMA) {
+            this._expect(FormatterWorker.JavaScriptTokens.COMMA);
             this._builder.addSpace();
             this._parseAssignmentExpression();
         }
@@ -622,7 +445,7 @@ JavaScriptFormatter.prototype = {
     {
         this._parseConditionalExpression();
         var token = this._peek();
-        if (Tokens.ASSIGN <= token && token <= Tokens.ASSIGN_MOD) {
+        if (FormatterWorker.JavaScriptTokens.ASSIGN <= token && token <= FormatterWorker.JavaScriptTokens.ASSIGN_MOD) {
             this._builder.addSpace();
             this._next();
             this._builder.addSpace();
@@ -633,13 +456,13 @@ JavaScriptFormatter.prototype = {
     _parseConditionalExpression: function()
     {
         this._parseBinaryExpression();
-        if (this._peek() === Tokens.CONDITIONAL) {
+        if (this._peek() === FormatterWorker.JavaScriptTokens.CONDITIONAL) {
             this._builder.addSpace();
-            this._consume(Tokens.CONDITIONAL);
+            this._consume(FormatterWorker.JavaScriptTokens.CONDITIONAL);
             this._builder.addSpace();
             this._parseAssignmentExpression();
             this._builder.addSpace();
-            this._expect(Tokens.COLON);
+            this._expect(FormatterWorker.JavaScriptTokens.COLON);
             this._builder.addSpace();
             this._parseAssignmentExpression();
         }
@@ -649,7 +472,7 @@ JavaScriptFormatter.prototype = {
     {
         this._parseUnaryExpression();
         var token = this._peek();
-        while (Tokens.OR <= token && token <= Tokens.IN) {
+        while (FormatterWorker.JavaScriptTokens.OR <= token && token <= FormatterWorker.JavaScriptTokens.IN) {
             this._builder.addSpace();
             this._next();
             this._builder.addSpace();
@@ -661,9 +484,9 @@ JavaScriptFormatter.prototype = {
     _parseUnaryExpression: function()
     {
         var token = this._peek();
-        if ((Tokens.NOT <= token && token <= Tokens.VOID) || token === Tokens.ADD || token === Tokens.SUB || token ===  Tokens.INC || token === Tokens.DEC) {
+        if ((FormatterWorker.JavaScriptTokens.NOT <= token && token <= FormatterWorker.JavaScriptTokens.VOID) || token === FormatterWorker.JavaScriptTokens.ADD || token === FormatterWorker.JavaScriptTokens.SUB || token ===  FormatterWorker.JavaScriptTokens.INC || token === FormatterWorker.JavaScriptTokens.DEC) {
             this._next();
-            if (token === Tokens.DELETE || token === Tokens.TYPEOF || token === Tokens.VOID)
+            if (token === FormatterWorker.JavaScriptTokens.DELETE || token === FormatterWorker.JavaScriptTokens.TYPEOF || token === FormatterWorker.JavaScriptTokens.VOID)
                 this._builder.addSpace();
             this._parseUnaryExpression();
         } else
@@ -674,32 +497,32 @@ JavaScriptFormatter.prototype = {
     {
         this._parseLeftHandSideExpression();
         var token = this._peek();
-        if (!this._hasLineTerminatorBeforeNext() && (token === Tokens.INC || token === Tokens.DEC))
+        if (!this._hasLineTerminatorBeforeNext() && (token === FormatterWorker.JavaScriptTokens.INC || token === FormatterWorker.JavaScriptTokens.DEC))
             this._next();
     },
 
     _parseLeftHandSideExpression: function()
     {
-        if (this._peek() === Tokens.NEW)
+        if (this._peek() === FormatterWorker.JavaScriptTokens.NEW)
             this._parseNewExpression();
         else
             this._parseMemberExpression();
 
         while (true) {
             switch (this._peek()) {
-            case Tokens.LBRACK:
-                this._consume(Tokens.LBRACK);
+            case FormatterWorker.JavaScriptTokens.LBRACK:
+                this._consume(FormatterWorker.JavaScriptTokens.LBRACK);
                 this._parseExpression();
-                this._expect(Tokens.RBRACK);
+                this._expect(FormatterWorker.JavaScriptTokens.RBRACK);
                 break;
 
-            case Tokens.LPAREN:
+            case FormatterWorker.JavaScriptTokens.LPAREN:
                 this._parseArguments();
                 break;
 
-            case Tokens.PERIOD:
-                this._consume(Tokens.PERIOD);
-                this._expect(Tokens.IDENTIFIER);
+            case FormatterWorker.JavaScriptTokens.PERIOD:
+                this._consume(FormatterWorker.JavaScriptTokens.PERIOD);
+                this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
                 break;
 
             default:
@@ -710,9 +533,9 @@ JavaScriptFormatter.prototype = {
 
     _parseNewExpression: function()
     {
-        this._expect(Tokens.NEW);
+        this._expect(FormatterWorker.JavaScriptTokens.NEW);
         this._builder.addSpace();
-        if (this._peek() === Tokens.NEW)
+        if (this._peek() === FormatterWorker.JavaScriptTokens.NEW)
             this._parseNewExpression();
         else
             this._parseMemberExpression();
@@ -720,11 +543,11 @@ JavaScriptFormatter.prototype = {
 
     _parseMemberExpression: function()
     {
-        if (this._peek() === Tokens.FUNCTION) {
-            this._expect(Tokens.FUNCTION);
-            if (this._peek() === Tokens.IDENTIFIER) {
+        if (this._peek() === FormatterWorker.JavaScriptTokens.FUNCTION) {
+            this._expect(FormatterWorker.JavaScriptTokens.FUNCTION);
+            if (this._peek() === FormatterWorker.JavaScriptTokens.IDENTIFIER) {
                 this._builder.addSpace();
-                this._expect(Tokens.IDENTIFIER);
+                this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
             }
             this._parseFunctionLiteral();
         } else
@@ -732,18 +555,18 @@ JavaScriptFormatter.prototype = {
 
         while (true) {
             switch (this._peek()) {
-            case Tokens.LBRACK:
-                this._consume(Tokens.LBRACK);
+            case FormatterWorker.JavaScriptTokens.LBRACK:
+                this._consume(FormatterWorker.JavaScriptTokens.LBRACK);
                 this._parseExpression();
-                this._expect(Tokens.RBRACK);
+                this._expect(FormatterWorker.JavaScriptTokens.RBRACK);
                 break;
 
-            case Tokens.PERIOD:
-                this._consume(Tokens.PERIOD);
-                this._expect(Tokens.IDENTIFIER);
+            case FormatterWorker.JavaScriptTokens.PERIOD:
+                this._consume(FormatterWorker.JavaScriptTokens.PERIOD);
+                this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
                 break;
 
-            case Tokens.LPAREN:
+            case FormatterWorker.JavaScriptTokens.LPAREN:
                 this._parseArguments();
                 break;
 
@@ -755,39 +578,39 @@ JavaScriptFormatter.prototype = {
 
     _parseDebuggerStatement: function()
     {
-        this._expect(Tokens.DEBUGGER);
+        this._expect(FormatterWorker.JavaScriptTokens.DEBUGGER);
         this._expectSemicolon();
     },
 
     _parsePrimaryExpression: function()
     {
         switch (this._peek()) {
-        case Tokens.THIS:
-            return this._consume(Tokens.THIS);
-        case Tokens.NULL_LITERAL:
-            return this._consume(Tokens.NULL_LITERAL);
-        case Tokens.TRUE_LITERAL:
-            return this._consume(Tokens.TRUE_LITERAL);
-        case Tokens.FALSE_LITERAL:
-            return this._consume(Tokens.FALSE_LITERAL);
-        case Tokens.IDENTIFIER:
-            return this._consume(Tokens.IDENTIFIER);
-        case Tokens.NUMBER:
-            return this._consume(Tokens.NUMBER);
-        case Tokens.STRING:
-            return this._consume(Tokens.STRING);
-        case Tokens.ASSIGN_DIV:
+        case FormatterWorker.JavaScriptTokens.THIS:
+            return this._consume(FormatterWorker.JavaScriptTokens.THIS);
+        case FormatterWorker.JavaScriptTokens.NULL_LITERAL:
+            return this._consume(FormatterWorker.JavaScriptTokens.NULL_LITERAL);
+        case FormatterWorker.JavaScriptTokens.TRUE_LITERAL:
+            return this._consume(FormatterWorker.JavaScriptTokens.TRUE_LITERAL);
+        case FormatterWorker.JavaScriptTokens.FALSE_LITERAL:
+            return this._consume(FormatterWorker.JavaScriptTokens.FALSE_LITERAL);
+        case FormatterWorker.JavaScriptTokens.IDENTIFIER:
+            return this._consume(FormatterWorker.JavaScriptTokens.IDENTIFIER);
+        case FormatterWorker.JavaScriptTokens.NUMBER:
+            return this._consume(FormatterWorker.JavaScriptTokens.NUMBER);
+        case FormatterWorker.JavaScriptTokens.STRING:
+            return this._consume(FormatterWorker.JavaScriptTokens.STRING);
+        case FormatterWorker.JavaScriptTokens.ASSIGN_DIV:
             return this._parseRegExpLiteral();
-        case Tokens.DIV:
+        case FormatterWorker.JavaScriptTokens.DIV:
             return this._parseRegExpLiteral();
-        case Tokens.LBRACK:
+        case FormatterWorker.JavaScriptTokens.LBRACK:
             return this._parseArrayLiteral();
-        case Tokens.LBRACE:
+        case FormatterWorker.JavaScriptTokens.LBRACE:
             return this._parseObjectLiteral();
-        case Tokens.LPAREN:
-            this._consume(Tokens.LPAREN);
+        case FormatterWorker.JavaScriptTokens.LPAREN:
+            this._consume(FormatterWorker.JavaScriptTokens.LPAREN);
             this._parseExpression();
-            this._expect(Tokens.RPAREN);
+            this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
             return;
         default:
             return this._next();
@@ -796,26 +619,26 @@ JavaScriptFormatter.prototype = {
 
     _parseArrayLiteral: function()
     {
-        this._expect(Tokens.LBRACK);
+        this._expect(FormatterWorker.JavaScriptTokens.LBRACK);
         this._builder.increaseNestingLevel();
-        while (this._peek() !== Tokens.RBRACK) {
-            if (this._peek() !== Tokens.COMMA)
+        while (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACK) {
+            if (this._peek() !== FormatterWorker.JavaScriptTokens.COMMA)
                 this._parseAssignmentExpression();
-            if (this._peek() !== Tokens.RBRACK) {
-                this._expect(Tokens.COMMA);
+            if (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACK) {
+                this._expect(FormatterWorker.JavaScriptTokens.COMMA);
                 this._builder.addSpace();
             }
         }
         this._builder.decreaseNestingLevel();
-        this._expect(Tokens.RBRACK);
+        this._expect(FormatterWorker.JavaScriptTokens.RBRACK);
     },
 
     _parseObjectLiteralGetSet: function()
     {
         var token = this._peek();
-        if (token === Tokens.IDENTIFIER || token === Tokens.NUMBER || token === Tokens.STRING ||
-            Tokens.DELETE <= token && token <= Tokens.FALSE_LITERAL ||
-            token === Tokens.INSTANCEOF || token === Tokens.IN || token === Tokens.CONST) {
+        if (token === FormatterWorker.JavaScriptTokens.IDENTIFIER || token === FormatterWorker.JavaScriptTokens.NUMBER || token === FormatterWorker.JavaScriptTokens.STRING ||
+            FormatterWorker.JavaScriptTokens.DELETE <= token && token <= FormatterWorker.JavaScriptTokens.FALSE_LITERAL ||
+            token === FormatterWorker.JavaScriptTokens.INSTANCEOF || token === FormatterWorker.JavaScriptTokens.IN || token === FormatterWorker.JavaScriptTokens.CONST) {
             this._next();
             this._parseFunctionLiteral();
         }
@@ -823,46 +646,46 @@ JavaScriptFormatter.prototype = {
 
     _parseObjectLiteral: function()
     {
-        this._expect(Tokens.LBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.LBRACE);
         this._builder.increaseNestingLevel();
-        while (this._peek() !== Tokens.RBRACE) {
+        while (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACE) {
             var token = this._peek();
             switch (token) {
-            case Tokens.IDENTIFIER:
-                this._consume(Tokens.IDENTIFIER);
+            case FormatterWorker.JavaScriptTokens.IDENTIFIER:
+                this._consume(FormatterWorker.JavaScriptTokens.IDENTIFIER);
                 var name = this._token.value;
-                if ((name === "get" || name === "set") && this._peek() !== Tokens.COLON) {
+                if ((name === "get" || name === "set") && this._peek() !== FormatterWorker.JavaScriptTokens.COLON) {
                     this._builder.addSpace();
                     this._parseObjectLiteralGetSet();
-                    if (this._peek() !== Tokens.RBRACE) {
-                        this._expect(Tokens.COMMA);
+                    if (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACE) {
+                        this._expect(FormatterWorker.JavaScriptTokens.COMMA);
                     }
                     continue;
                 }
                 break;
 
-            case Tokens.STRING:
-                this._consume(Tokens.STRING);
+            case FormatterWorker.JavaScriptTokens.STRING:
+                this._consume(FormatterWorker.JavaScriptTokens.STRING);
                 break;
 
-            case Tokens.NUMBER:
-                this._consume(Tokens.NUMBER);
+            case FormatterWorker.JavaScriptTokens.NUMBER:
+                this._consume(FormatterWorker.JavaScriptTokens.NUMBER);
                 break;
 
             default:
                 this._next();
             }
 
-            this._expect(Tokens.COLON);
+            this._expect(FormatterWorker.JavaScriptTokens.COLON);
             this._builder.addSpace();
             this._parseAssignmentExpression();
-            if (this._peek() !== Tokens.RBRACE) {
-                this._expect(Tokens.COMMA);
+            if (this._peek() !== FormatterWorker.JavaScriptTokens.RBRACE) {
+                this._expect(FormatterWorker.JavaScriptTokens.COMMA);
             }
         }
         this._builder.decreaseNestingLevel();
 
-        this._expect(Tokens.RBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.RBRACE);
     },
 
     _parseRegExpLiteral: function()
@@ -877,39 +700,325 @@ JavaScriptFormatter.prototype = {
 
     _parseArguments: function()
     {
-        this._expect(Tokens.LPAREN);
-        var done = (this._peek() === Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
+        var done = (this._peek() === FormatterWorker.JavaScriptTokens.RPAREN);
         while (!done) {
             this._parseAssignmentExpression();
-            done = (this._peek() === Tokens.RPAREN);
+            done = (this._peek() === FormatterWorker.JavaScriptTokens.RPAREN);
             if (!done) {
-                this._expect(Tokens.COMMA);
+                this._expect(FormatterWorker.JavaScriptTokens.COMMA);
                 this._builder.addSpace();
             }
         }
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
     },
 
     _parseFunctionLiteral: function()
     {
-        this._expect(Tokens.LPAREN);
-        var done = (this._peek() === Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.LPAREN);
+        var done = (this._peek() === FormatterWorker.JavaScriptTokens.RPAREN);
         while (!done) {
-            this._expect(Tokens.IDENTIFIER);
-            done = (this._peek() === Tokens.RPAREN);
+            this._expect(FormatterWorker.JavaScriptTokens.IDENTIFIER);
+            done = (this._peek() === FormatterWorker.JavaScriptTokens.RPAREN);
             if (!done) {
-                this._expect(Tokens.COMMA);
+                this._expect(FormatterWorker.JavaScriptTokens.COMMA);
                 this._builder.addSpace();
             }
         }
-        this._expect(Tokens.RPAREN);
+        this._expect(FormatterWorker.JavaScriptTokens.RPAREN);
         this._builder.addSpace();
 
-        this._expect(Tokens.LBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.LBRACE);
         this._builder.addNewLine();
         this._builder.increaseNestingLevel();
-        this._parseSourceElements(Tokens.RBRACE);
+        this._parseSourceElements(FormatterWorker.JavaScriptTokens.RBRACE);
         this._builder.decreaseNestingLevel();
-        this._expect(Tokens.RBRACE);
+        this._expect(FormatterWorker.JavaScriptTokens.RBRACE);
+    }
+}
+
+/**
+ * @constructor
+ * @param {string} content
+ * @param {{original: Array.<number>, formatted: Array.<number>}} mapping
+ * @param {number} originalOffset
+ * @param {number} formattedOffset
+ * @param {string} indentString
+ */
+FormatterWorker.JavaScriptFormattedContentBuilder = function(content, mapping, originalOffset, formattedOffset, indentString)
+{
+    this._originalContent = content;
+    this._originalOffset = originalOffset;
+    this._lastOriginalPosition = 0;
+
+    this._formattedContent = [];
+    this._formattedContentLength = 0;
+    this._formattedOffset = formattedOffset;
+    this._lastFormattedPosition = 0;
+
+    this._mapping = mapping;
+
+    this._lineNumber = 0;
+    this._nestingLevel = 0;
+    this._indentString = indentString;
+    this._cachedIndents = {};
+}
+
+FormatterWorker.JavaScriptFormattedContentBuilder.prototype = {
+    /**
+     * @param {{comments_before: Array.<string>, line: number, pos: number, endLine: number, nlb: boolean}} token
+     */
+    addToken: function(token)
+    {
+        for (var i = 0; i < token.comments_before.length; ++i)
+            this._addComment(token.comments_before[i]);
+
+        while (this._lineNumber < token.line) {
+            this._addText("\n");
+            this._addIndent();
+            this._needNewLine = false;
+            this._lineNumber += 1;
+        }
+
+        if (this._needNewLine) {
+            this._addText("\n");
+            this._addIndent();
+            this._needNewLine = false;
+        }
+
+        this._addMappingIfNeeded(token.pos);
+        this._addText(this._originalContent.substring(token.pos, token.endPos));
+        this._lineNumber = token.endLine;
+    },
+
+    addSpace: function()
+    {
+        this._addText(" ");
+    },
+
+    addNewLine: function()
+    {
+        this._needNewLine = true;
+    },
+
+    increaseNestingLevel: function()
+    {
+        this._nestingLevel += 1;
+    },
+
+    decreaseNestingLevel: function()
+    {
+        this._nestingLevel -= 1;
+    },
+
+    /**
+     * @return {string}
+     */
+    content: function()
+    {
+        return this._formattedContent.join("");
+    },
+
+    _addIndent: function()
+    {
+        if (this._cachedIndents[this._nestingLevel]) {
+            this._addText(this._cachedIndents[this._nestingLevel]);
+            return;
+        }
+
+        var fullIndent = "";
+        for (var i = 0; i < this._nestingLevel; ++i)
+            fullIndent += this._indentString;
+        this._addText(fullIndent);
+
+        // Cache a maximum of 20 nesting level indents.
+        if (this._nestingLevel <= 20)
+            this._cachedIndents[this._nestingLevel] = fullIndent;
+    },
+
+    _addComment: function(comment)
+    {
+        if (this._lineNumber < comment.line) {
+            for (var j = this._lineNumber; j < comment.line; ++j)
+                this._addText("\n");
+            this._lineNumber = comment.line;
+            this._needNewLine = false;
+            this._addIndent();
+        } else
+            this.addSpace();
+
+        this._addMappingIfNeeded(comment.pos);
+        if (comment.type === "comment1")
+            this._addText("//");
+        else
+            this._addText("/*");
+
+        this._addText(comment.value);
+
+        if (comment.type !== "comment1") {
+            this._addText("*/");
+            var position;
+            while ((position = comment.value.indexOf("\n", position + 1)) !== -1)
+                this._lineNumber += 1;
+        }
+    },
+
+    /**
+     * @param {string} text
+     */
+    _addText: function(text)
+    {
+        this._formattedContent.push(text);
+        this._formattedContentLength += text.length;
+    },
+
+    /**
+     * @param {number} originalPosition
+     */
+    _addMappingIfNeeded: function(originalPosition)
+    {
+        if (originalPosition - this._lastOriginalPosition === this._formattedContentLength - this._lastFormattedPosition)
+            return;
+        this._mapping.original.push(this._originalOffset + originalPosition);
+        this._lastOriginalPosition = originalPosition;
+        this._mapping.formatted.push(this._formattedOffset + this._formattedContentLength);
+        this._lastFormattedPosition = this._formattedContentLength;
+    }
+}
+
+FormatterWorker.JavaScriptTokens = {};
+FormatterWorker.JavaScriptTokensByValue = {};
+
+FormatterWorker.JavaScriptTokens.EOS = 0;
+FormatterWorker.JavaScriptTokens.LPAREN = FormatterWorker.JavaScriptTokensByValue["("] = 1;
+FormatterWorker.JavaScriptTokens.RPAREN = FormatterWorker.JavaScriptTokensByValue[")"] = 2;
+FormatterWorker.JavaScriptTokens.LBRACK = FormatterWorker.JavaScriptTokensByValue["["] = 3;
+FormatterWorker.JavaScriptTokens.RBRACK = FormatterWorker.JavaScriptTokensByValue["]"] = 4;
+FormatterWorker.JavaScriptTokens.LBRACE = FormatterWorker.JavaScriptTokensByValue["{"] = 5;
+FormatterWorker.JavaScriptTokens.RBRACE = FormatterWorker.JavaScriptTokensByValue["}"] = 6;
+FormatterWorker.JavaScriptTokens.COLON = FormatterWorker.JavaScriptTokensByValue[":"] = 7;
+FormatterWorker.JavaScriptTokens.SEMICOLON = FormatterWorker.JavaScriptTokensByValue[";"] = 8;
+FormatterWorker.JavaScriptTokens.PERIOD = FormatterWorker.JavaScriptTokensByValue["."] = 9;
+FormatterWorker.JavaScriptTokens.CONDITIONAL = FormatterWorker.JavaScriptTokensByValue["?"] = 10;
+FormatterWorker.JavaScriptTokens.INC = FormatterWorker.JavaScriptTokensByValue["++"] = 11;
+FormatterWorker.JavaScriptTokens.DEC = FormatterWorker.JavaScriptTokensByValue["--"] = 12;
+FormatterWorker.JavaScriptTokens.ASSIGN = FormatterWorker.JavaScriptTokensByValue["="] = 13;
+FormatterWorker.JavaScriptTokens.ASSIGN_BIT_OR = FormatterWorker.JavaScriptTokensByValue["|="] = 14;
+FormatterWorker.JavaScriptTokens.ASSIGN_BIT_XOR = FormatterWorker.JavaScriptTokensByValue["^="] = 15;
+FormatterWorker.JavaScriptTokens.ASSIGN_BIT_AND = FormatterWorker.JavaScriptTokensByValue["&="] = 16;
+FormatterWorker.JavaScriptTokens.ASSIGN_SHL = FormatterWorker.JavaScriptTokensByValue["<<="] = 17;
+FormatterWorker.JavaScriptTokens.ASSIGN_SAR = FormatterWorker.JavaScriptTokensByValue[">>="] = 18;
+FormatterWorker.JavaScriptTokens.ASSIGN_SHR = FormatterWorker.JavaScriptTokensByValue[">>>="] = 19;
+FormatterWorker.JavaScriptTokens.ASSIGN_ADD = FormatterWorker.JavaScriptTokensByValue["+="] = 20;
+FormatterWorker.JavaScriptTokens.ASSIGN_SUB = FormatterWorker.JavaScriptTokensByValue["-="] = 21;
+FormatterWorker.JavaScriptTokens.ASSIGN_MUL = FormatterWorker.JavaScriptTokensByValue["*="] = 22;
+FormatterWorker.JavaScriptTokens.ASSIGN_DIV = FormatterWorker.JavaScriptTokensByValue["/="] = 23;
+FormatterWorker.JavaScriptTokens.ASSIGN_MOD = FormatterWorker.JavaScriptTokensByValue["%="] = 24;
+FormatterWorker.JavaScriptTokens.COMMA = FormatterWorker.JavaScriptTokensByValue[","] = 25;
+FormatterWorker.JavaScriptTokens.OR = FormatterWorker.JavaScriptTokensByValue["||"] = 26;
+FormatterWorker.JavaScriptTokens.AND = FormatterWorker.JavaScriptTokensByValue["&&"] = 27;
+FormatterWorker.JavaScriptTokens.BIT_OR = FormatterWorker.JavaScriptTokensByValue["|"] = 28;
+FormatterWorker.JavaScriptTokens.BIT_XOR = FormatterWorker.JavaScriptTokensByValue["^"] = 29;
+FormatterWorker.JavaScriptTokens.BIT_AND = FormatterWorker.JavaScriptTokensByValue["&"] = 30;
+FormatterWorker.JavaScriptTokens.SHL = FormatterWorker.JavaScriptTokensByValue["<<"] = 31;
+FormatterWorker.JavaScriptTokens.SAR = FormatterWorker.JavaScriptTokensByValue[">>"] = 32;
+FormatterWorker.JavaScriptTokens.SHR = FormatterWorker.JavaScriptTokensByValue[">>>"] = 33;
+FormatterWorker.JavaScriptTokens.ADD = FormatterWorker.JavaScriptTokensByValue["+"] = 34;
+FormatterWorker.JavaScriptTokens.SUB = FormatterWorker.JavaScriptTokensByValue["-"] = 35;
+FormatterWorker.JavaScriptTokens.MUL = FormatterWorker.JavaScriptTokensByValue["*"] = 36;
+FormatterWorker.JavaScriptTokens.DIV = FormatterWorker.JavaScriptTokensByValue["/"] = 37;
+FormatterWorker.JavaScriptTokens.MOD = FormatterWorker.JavaScriptTokensByValue["%"] = 38;
+FormatterWorker.JavaScriptTokens.EQ = FormatterWorker.JavaScriptTokensByValue["=="] = 39;
+FormatterWorker.JavaScriptTokens.NE = FormatterWorker.JavaScriptTokensByValue["!="] = 40;
+FormatterWorker.JavaScriptTokens.EQ_STRICT = FormatterWorker.JavaScriptTokensByValue["==="] = 41;
+FormatterWorker.JavaScriptTokens.NE_STRICT = FormatterWorker.JavaScriptTokensByValue["!=="] = 42;
+FormatterWorker.JavaScriptTokens.LT = FormatterWorker.JavaScriptTokensByValue["<"] = 43;
+FormatterWorker.JavaScriptTokens.GT = FormatterWorker.JavaScriptTokensByValue[">"] = 44;
+FormatterWorker.JavaScriptTokens.LTE = FormatterWorker.JavaScriptTokensByValue["<="] = 45;
+FormatterWorker.JavaScriptTokens.GTE = FormatterWorker.JavaScriptTokensByValue[">="] = 46;
+FormatterWorker.JavaScriptTokens.INSTANCEOF = FormatterWorker.JavaScriptTokensByValue["instanceof"] = 47;
+FormatterWorker.JavaScriptTokens.IN = FormatterWorker.JavaScriptTokensByValue["in"] = 48;
+FormatterWorker.JavaScriptTokens.NOT = FormatterWorker.JavaScriptTokensByValue["!"] = 49;
+FormatterWorker.JavaScriptTokens.BIT_NOT = FormatterWorker.JavaScriptTokensByValue["~"] = 50;
+FormatterWorker.JavaScriptTokens.DELETE = FormatterWorker.JavaScriptTokensByValue["delete"] = 51;
+FormatterWorker.JavaScriptTokens.TYPEOF = FormatterWorker.JavaScriptTokensByValue["typeof"] = 52;
+FormatterWorker.JavaScriptTokens.VOID = FormatterWorker.JavaScriptTokensByValue["void"] = 53;
+FormatterWorker.JavaScriptTokens.BREAK = FormatterWorker.JavaScriptTokensByValue["break"] = 54;
+FormatterWorker.JavaScriptTokens.CASE = FormatterWorker.JavaScriptTokensByValue["case"] = 55;
+FormatterWorker.JavaScriptTokens.CATCH = FormatterWorker.JavaScriptTokensByValue["catch"] = 56;
+FormatterWorker.JavaScriptTokens.CONTINUE = FormatterWorker.JavaScriptTokensByValue["continue"] = 57;
+FormatterWorker.JavaScriptTokens.DEBUGGER = FormatterWorker.JavaScriptTokensByValue["debugger"] = 58;
+FormatterWorker.JavaScriptTokens.DEFAULT = FormatterWorker.JavaScriptTokensByValue["default"] = 59;
+FormatterWorker.JavaScriptTokens.DO = FormatterWorker.JavaScriptTokensByValue["do"] = 60;
+FormatterWorker.JavaScriptTokens.ELSE = FormatterWorker.JavaScriptTokensByValue["else"] = 61;
+FormatterWorker.JavaScriptTokens.FINALLY = FormatterWorker.JavaScriptTokensByValue["finally"] = 62;
+FormatterWorker.JavaScriptTokens.FOR = FormatterWorker.JavaScriptTokensByValue["for"] = 63;
+FormatterWorker.JavaScriptTokens.FUNCTION = FormatterWorker.JavaScriptTokensByValue["function"] = 64;
+FormatterWorker.JavaScriptTokens.IF = FormatterWorker.JavaScriptTokensByValue["if"] = 65;
+FormatterWorker.JavaScriptTokens.NEW = FormatterWorker.JavaScriptTokensByValue["new"] = 66;
+FormatterWorker.JavaScriptTokens.RETURN = FormatterWorker.JavaScriptTokensByValue["return"] = 67;
+FormatterWorker.JavaScriptTokens.SWITCH = FormatterWorker.JavaScriptTokensByValue["switch"] = 68;
+FormatterWorker.JavaScriptTokens.THIS = FormatterWorker.JavaScriptTokensByValue["this"] = 69;
+FormatterWorker.JavaScriptTokens.THROW = FormatterWorker.JavaScriptTokensByValue["throw"] = 70;
+FormatterWorker.JavaScriptTokens.TRY = FormatterWorker.JavaScriptTokensByValue["try"] = 71;
+FormatterWorker.JavaScriptTokens.VAR = FormatterWorker.JavaScriptTokensByValue["var"] = 72;
+FormatterWorker.JavaScriptTokens.WHILE = FormatterWorker.JavaScriptTokensByValue["while"] = 73;
+FormatterWorker.JavaScriptTokens.WITH = FormatterWorker.JavaScriptTokensByValue["with"] = 74;
+FormatterWorker.JavaScriptTokens.NULL_LITERAL = FormatterWorker.JavaScriptTokensByValue["null"] = 75;
+FormatterWorker.JavaScriptTokens.TRUE_LITERAL = FormatterWorker.JavaScriptTokensByValue["true"] = 76;
+FormatterWorker.JavaScriptTokens.FALSE_LITERAL = FormatterWorker.JavaScriptTokensByValue["false"] = 77;
+FormatterWorker.JavaScriptTokens.NUMBER = 78;
+FormatterWorker.JavaScriptTokens.STRING = 79;
+FormatterWorker.JavaScriptTokens.IDENTIFIER = 80;
+FormatterWorker.JavaScriptTokens.CONST = FormatterWorker.JavaScriptTokensByValue["const"] = 81;
+
+FormatterWorker.JavaScriptTokensByType = {
+    "eof": FormatterWorker.JavaScriptTokens.EOS,
+    "name": FormatterWorker.JavaScriptTokens.IDENTIFIER,
+    "num": FormatterWorker.JavaScriptTokens.NUMBER,
+    "regexp": FormatterWorker.JavaScriptTokens.DIV,
+    "string": FormatterWorker.JavaScriptTokens.STRING
+};
+
+/**
+ * @constructor
+ * @param {string} content
+ */
+FormatterWorker.JavaScriptTokenizer = function(content)
+{
+    this._readNextToken = parse.tokenizer(content);
+    this._state = this._readNextToken.context();
+}
+
+FormatterWorker.JavaScriptTokenizer.prototype = {
+    /**
+     * @return {string}
+     */
+    content: function()
+    {
+        return this._state.text;
+    },
+
+    /**
+     * @param {boolean=} forceRegexp
+     */
+    next: function(forceRegexp)
+    {
+        var uglifyToken = this._readNextToken(forceRegexp);
+        uglifyToken.endPos = this._state.pos;
+        uglifyToken.endLine = this._state.line;
+        uglifyToken.token = this._convertUglifyToken(uglifyToken);
+        return uglifyToken;
+    },
+
+    _convertUglifyToken: function(uglifyToken)
+    {
+        var token = FormatterWorker.JavaScriptTokensByType[uglifyToken.type];
+        if (typeof token === "number")
+            return token;
+        token = FormatterWorker.JavaScriptTokensByValue[uglifyToken.value];
+        if (typeof token === "number")
+            return token;
+        throw "Unknown token type " + uglifyToken.type;
     }
 }