From ca32f08966f1b51fcb19460f0996bb0c4048e6fe Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Sat, 3 Dec 2011 13:29:22 +0100
Subject: Update to MediaWiki 1.18.0

* also update ArchLinux skin to chagnes in MonoBook
* Use only css to hide our menu bar when printing
---
 includes/libs/CSSMin.php     |   52 +-
 includes/libs/HttpStatus.php |   68 ++
 includes/libs/jsminplus.php  | 2094 ++++++++++++++++++++++++++++++++++++++++++
 includes/libs/spyc.php       |  248 -----
 4 files changed, 2192 insertions(+), 270 deletions(-)
 create mode 100644 includes/libs/HttpStatus.php
 create mode 100644 includes/libs/jsminplus.php
 delete mode 100644 includes/libs/spyc.php

(limited to 'includes/libs')

diff --git a/includes/libs/CSSMin.php b/includes/libs/CSSMin.php
index c0e78112..4012b695 100644
--- a/includes/libs/CSSMin.php
+++ b/includes/libs/CSSMin.php
@@ -1,24 +1,24 @@
 <?php
 /*
  * Copyright 2010 Wikimedia Foundation
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may
  * not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  * 		http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
  * OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License. 
+ * specific language governing permissions and limitations under the License.
  */
 
 /**
  * Transforms CSS data
- * 
+ *
  * This class provides minification, URL remapping, URL extracting, and data-URL embedding.
- * 
+ *
  * @file
  * @version 0.1.1 -- 2010-09-11
  * @author Trevor Parscal <tparscal@wikimedia.org>
@@ -26,9 +26,9 @@
  * @license http://www.apache.org/licenses/LICENSE-2.0
  */
 class CSSMin {
-	
+
 	/* Constants */
-	
+
 	/**
 	 * Maximum file size to still qualify for in-line embedding as a data-URI
 	 *
@@ -37,9 +37,9 @@ class CSSMin {
 	 */
 	const EMBED_SIZE_LIMIT = 24576;
 	const URL_REGEX = 'url\(\s*[\'"]?(?P<file>[^\?\)\'"]*)(?P<query>\??[^\)\'"]*)[\'"]?\s*\)';
-	
+
 	/* Protected Static Members */
-	
+
 	/** @var array List of common image files extensions and mime-types */
 	protected static $mimeTypes = array(
 		'gif' => 'image/gif',
@@ -51,9 +51,9 @@ class CSSMin {
 		'tiff' => 'image/tiff',
 		'xbm' => 'image/x-xbitmap',
 	);
-	
+
 	/* Static Methods */
-	
+
 	/**
 	 * Gets a list of local file paths which are referenced in a CSS style sheet
 	 *
@@ -78,7 +78,7 @@ class CSSMin {
 		}
 		return $files;
 	}
-	
+
 	protected static function getMimeType( $file ) {
 		$realpath = realpath( $file );
 		// Try a couple of different ways to get the mime-type of a file, in order of
@@ -92,7 +92,7 @@ class CSSMin {
 			// As of PHP 5.3, this is how you get the mime-type of a file; it uses the Fileinfo
 			// PECL extension
 			return finfo_file( finfo_open( FILEINFO_MIME_TYPE ), $realpath );
-		} else if ( function_exists( 'mime_content_type' ) ) {
+		} elseif ( function_exists( 'mime_content_type' ) ) {
 			// Before this was deprecated in PHP 5.3, this was how you got the mime-type of a file
 			return mime_content_type( $file );
 		} else {
@@ -104,7 +104,7 @@ class CSSMin {
 		}
 		return false;
 	}
-	
+
 	/**
 	 * Remaps CSS URL paths and automatically embeds data URIs for URL rules
 	 * preceded by an /* @embed * / comment
@@ -130,12 +130,20 @@ class CSSMin {
 			// URLs with absolute paths like /w/index.php need to be expanded
 			// to absolute URLs but otherwise left alone
 			if ( $match['file'][0] !== '' && $match['file'][0][0] === '/' ) {
-				// Replace the file path with an expanded URL
-				$source = substr_replace( $source, wfExpandUrl( $match['file'][0] ),
-					$match['file'][1], strlen( $match['file'][0] )
-				);
+				// Replace the file path with an expanded (possibly protocol-relative) URL
+				// ...but only if wfExpandUrl() is even available.
+				// This will not be the case if we're running outside of MW
+				$lengthIncrease = 0;
+				if ( function_exists( 'wfExpandUrl' ) ) {
+					$expanded = wfExpandUrl( $match['file'][0], PROTO_RELATIVE );
+					$origLength = strlen( $match['file'][0] );
+					$lengthIncrease = strlen( $expanded ) - $origLength;
+					$source = substr_replace( $source, $expanded,
+						$match['file'][1], $origLength
+					);
+				}
 				// Move the offset to the end of the match, leaving it alone
-				$offset = $match[0][1] + strlen( $match[0][0] );
+				$offset = $match[0][1] + strlen( $match[0][0] ) + $lengthIncrease;
 				continue;
 			}
 			// Shortcuts
@@ -175,9 +183,9 @@ class CSSMin {
 				}
 				if ( $replacement === false ) {
 					// Assume that all paths are relative to $remote, and make them absolute
-					$replacement = "{$embed}{$pre}url({$url}){$post};";				
+					$replacement = "{$embed}{$pre}url({$url}){$post};";
 				}
-			} else if ( $local === false ) {
+			} elseif ( $local === false ) {
 				// Assume that all paths are relative to $remote, and make them absolute
 				$replacement = "{$embed}{$pre}url({$url}{$query}){$post};";
 			}
diff --git a/includes/libs/HttpStatus.php b/includes/libs/HttpStatus.php
new file mode 100644
index 00000000..2985c652
--- /dev/null
+++ b/includes/libs/HttpStatus.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * @todo document
+ */
+class HttpStatus {
+
+	/**
+	 * Get the message associed with the HTTP response code $code
+	 *
+	 * Replace OutputPage::getStatusMessage( $code )
+	 *
+	 * @param $code Integer: status code
+	 * @return String or null: message or null if $code is not in the list of
+	 *         messages
+	 */
+	public static function getMessage( $code ) {
+		static $statusMessage = array(
+			100 => 'Continue',
+			101 => 'Switching Protocols',
+			102 => 'Processing',
+			200 => 'OK',
+			201 => 'Created',
+			202 => 'Accepted',
+			203 => 'Non-Authoritative Information',
+			204 => 'No Content',
+			205 => 'Reset Content',
+			206 => 'Partial Content',
+			207 => 'Multi-Status',
+			300 => 'Multiple Choices',
+			301 => 'Moved Permanently',
+			302 => 'Found',
+			303 => 'See Other',
+			304 => 'Not Modified',
+			305 => 'Use Proxy',
+			307 => 'Temporary Redirect',
+			400 => 'Bad Request',
+			401 => 'Unauthorized',
+			402 => 'Payment Required',
+			403 => 'Forbidden',
+			404 => 'Not Found',
+			405 => 'Method Not Allowed',
+			406 => 'Not Acceptable',
+			407 => 'Proxy Authentication Required',
+			408 => 'Request Timeout',
+			409 => 'Conflict',
+			410 => 'Gone',
+			411 => 'Length Required',
+			412 => 'Precondition Failed',
+			413 => 'Request Entity Too Large',
+			414 => 'Request-URI Too Large',
+			415 => 'Unsupported Media Type',
+			416 => 'Request Range Not Satisfiable',
+			417 => 'Expectation Failed',
+			422 => 'Unprocessable Entity',
+			423 => 'Locked',
+			424 => 'Failed Dependency',
+			500 => 'Internal Server Error',
+			501 => 'Not Implemented',
+			502 => 'Bad Gateway',
+			503 => 'Service Unavailable',
+			504 => 'Gateway Timeout',
+			505 => 'HTTP Version Not Supported',
+			507 => 'Insufficient Storage'
+		);
+		return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
+	}
+
+}
diff --git a/includes/libs/jsminplus.php b/includes/libs/jsminplus.php
new file mode 100644
index 00000000..bab4ff49
--- /dev/null
+++ b/includes/libs/jsminplus.php
@@ -0,0 +1,2094 @@
+<?php
+
+/**
+ * JSMinPlus version 1.3
+ *
+ * Minifies a javascript file using a javascript parser
+ *
+ * This implements a PHP port of Brendan Eich's Narcissus open source javascript engine (in javascript)
+ * References: http://en.wikipedia.org/wiki/Narcissus_(JavaScript_engine)
+ * Narcissus sourcecode: http://mxr.mozilla.org/mozilla/source/js/narcissus/
+ * JSMinPlus weblog: http://crisp.tweakblogs.net/blog/cat/716
+ *
+ * Tino Zijdel <crisp@tweakers.net>
+ *
+ * Usage: $minified = JSMinPlus::minify($script [, $filename])
+ *
+ * Versionlog (see also changelog.txt):
+ * 19-07-2011 - expanded operator and keyword defines. Fixes the notices when creating several JSTokenizer
+ * 17-05-2009 - fixed hook:colon precedence, fixed empty body in loop and if-constructs
+ * 18-04-2009 - fixed crashbug in PHP 5.2.9 and several other bugfixes
+ * 12-04-2009 - some small bugfixes and performance improvements
+ * 09-04-2009 - initial open sourced version 1.0
+ *
+ * Latest version of this script: http://files.tweakers.net/jsminplus/jsminplus.zip
+ *
+ */
+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Narcissus JavaScript engine.
+ *
+ * The Initial Developer of the Original Code is
+ * Brendan Eich <brendan@mozilla.org>.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Tino Zijdel <crisp@tweakers.net>
+ * PHP port, modifications and minifier routine are (C) 2009
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+define('TOKEN_END', 1);
+define('TOKEN_NUMBER', 2);
+define('TOKEN_IDENTIFIER', 3);
+define('TOKEN_STRING', 4);
+define('TOKEN_REGEXP', 5);
+define('TOKEN_NEWLINE', 6);
+define('TOKEN_CONDCOMMENT_START', 7);
+define('TOKEN_CONDCOMMENT_END', 8);
+
+define('JS_SCRIPT', 100);
+define('JS_BLOCK', 101);
+define('JS_LABEL', 102);
+define('JS_FOR_IN', 103);
+define('JS_CALL', 104);
+define('JS_NEW_WITH_ARGS', 105);
+define('JS_INDEX', 106);
+define('JS_ARRAY_INIT', 107);
+define('JS_OBJECT_INIT', 108);
+define('JS_PROPERTY_INIT', 109);
+define('JS_GETTER', 110);
+define('JS_SETTER', 111);
+define('JS_GROUP', 112);
+define('JS_LIST', 113);
+
+define('DECLARED_FORM', 0);
+define('EXPRESSED_FORM', 1);
+define('STATEMENT_FORM', 2);
+
+/* Operators */
+define('OP_SEMICOLON', ';');
+define('OP_COMMA', ',');
+define('OP_HOOK', '?');
+define('OP_COLON', ':');
+define('OP_OR', '||');
+define('OP_AND', '&&');
+define('OP_BITWISE_OR', '|');
+define('OP_BITWISE_XOR', '^');
+define('OP_BITWISE_AND', '&');
+define('OP_STRICT_EQ', '===');
+define('OP_EQ', '==');
+define('OP_ASSIGN', '=');
+define('OP_STRICT_NE', '!==');
+define('OP_NE', '!=');
+define('OP_LSH', '<<');
+define('OP_LE', '<=');
+define('OP_LT', '<');
+define('OP_URSH', '>>>');
+define('OP_RSH', '>>');
+define('OP_GE', '>=');
+define('OP_GT', '>');
+define('OP_INCREMENT', '++');
+define('OP_DECREMENT', '--');
+define('OP_PLUS', '+');
+define('OP_MINUS', '-');
+define('OP_MUL', '*');
+define('OP_DIV', '/');
+define('OP_MOD', '%');
+define('OP_NOT', '!');
+define('OP_BITWISE_NOT', '~');
+define('OP_DOT', '.');
+define('OP_LEFT_BRACKET', '[');
+define('OP_RIGHT_BRACKET', ']');
+define('OP_LEFT_CURLY', '{');
+define('OP_RIGHT_CURLY', '}');
+define('OP_LEFT_PAREN', '(');
+define('OP_RIGHT_PAREN', ')');
+define('OP_CONDCOMMENT_END', '@*/');
+
+define('OP_UNARY_PLUS', 'U+');
+define('OP_UNARY_MINUS', 'U-');
+
+/* Keywords */
+define('KEYWORD_BREAK', 'break');
+define('KEYWORD_CASE', 'case');
+define('KEYWORD_CATCH', 'catch');
+define('KEYWORD_CONST', 'const');
+define('KEYWORD_CONTINUE', 'continue');
+define('KEYWORD_DEBUGGER', 'debugger');
+define('KEYWORD_DEFAULT', 'default');
+define('KEYWORD_DELETE', 'delete');
+define('KEYWORD_DO', 'do');
+define('KEYWORD_ELSE', 'else');
+define('KEYWORD_ENUM', 'enum');
+define('KEYWORD_FALSE', 'false');
+define('KEYWORD_FINALLY', 'finally');
+define('KEYWORD_FOR', 'for');
+define('KEYWORD_FUNCTION', 'function');
+define('KEYWORD_IF', 'if');
+define('KEYWORD_IN', 'in');
+define('KEYWORD_INSTANCEOF', 'instanceof');
+define('KEYWORD_NEW', 'new');
+define('KEYWORD_NULL', 'null');
+define('KEYWORD_RETURN', 'return');
+define('KEYWORD_SWITCH', 'switch');
+define('KEYWORD_THIS', 'this');
+define('KEYWORD_THROW', 'throw');
+define('KEYWORD_TRUE', 'true');
+define('KEYWORD_TRY', 'try');
+define('KEYWORD_TYPEOF', 'typeof');
+define('KEYWORD_VAR', 'var');
+define('KEYWORD_VOID', 'void');
+define('KEYWORD_WHILE', 'while');
+define('KEYWORD_WITH', 'with');
+
+
+class JSMinPlus
+{
+	private $parser;
+	private $reserved = array(
+		'break', 'case', 'catch', 'continue', 'default', 'delete', 'do',
+		'else', 'finally', 'for', 'function', 'if', 'in', 'instanceof',
+		'new', 'return', 'switch', 'this', 'throw', 'try', 'typeof', 'var',
+		'void', 'while', 'with',
+		// Words reserved for future use
+		'abstract', 'boolean', 'byte', 'char', 'class', 'const', 'debugger',
+		'double', 'enum', 'export', 'extends', 'final', 'float', 'goto',
+		'implements', 'import', 'int', 'interface', 'long', 'native',
+		'package', 'private', 'protected', 'public', 'short', 'static',
+		'super', 'synchronized', 'throws', 'transient', 'volatile',
+		// These are not reserved, but should be taken into account
+		// in isValidIdentifier (See jslint source code)
+		'arguments', 'eval', 'true', 'false', 'Infinity', 'NaN', 'null', 'undefined'
+	);
+
+	private function __construct()
+	{
+		$this->parser = new JSParser();
+	}
+
+	public static function minify($js, $filename='')
+	{
+		static $instance;
+
+		// this is a singleton
+		if(!$instance)
+			$instance = new JSMinPlus();
+
+		return $instance->min($js, $filename);
+	}
+
+	private function min($js, $filename)
+	{
+		try
+		{
+			$n = $this->parser->parse($js, $filename, 1);
+			return $this->parseTree($n);
+		}
+		catch(Exception $e)
+		{
+			echo $e->getMessage() . "\n";
+		}
+
+		return false;
+	}
+
+	private function parseTree($n, $noBlockGrouping = false)
+	{
+		$s = '';
+
+		switch ($n->type)
+		{
+			case KEYWORD_FUNCTION:
+				$s .= 'function' . ($n->name ? ' ' . $n->name : '') . '(';
+				$params = $n->params;
+				for ($i = 0, $j = count($params); $i < $j; $i++)
+					$s .= ($i ? ',' : '') . $params[$i];
+				$s .= '){' . $this->parseTree($n->body, true) . '}';
+			break;
+
+			case JS_SCRIPT:
+				// we do nothing with funDecls or varDecls
+				$noBlockGrouping = true;
+			// FALL THROUGH
+
+			case JS_BLOCK:
+				$childs = $n->treeNodes;
+				$lastType = 0;
+				for ($c = 0, $i = 0, $j = count($childs); $i < $j; $i++)
+				{
+					$type = $childs[$i]->type;
+					$t = $this->parseTree($childs[$i]);
+					if (strlen($t))
+					{
+						if ($c)
+						{
+							$s = rtrim($s, ';');
+
+							if ($type == KEYWORD_FUNCTION && $childs[$i]->functionForm == DECLARED_FORM)
+							{
+								// put declared functions on a new line
+								$s .= "\n";
+							}
+							elseif ($type == KEYWORD_VAR && $type == $lastType)
+							{
+								// mutiple var-statements can go into one
+								$t = ',' . substr($t, 4);
+							}
+							else
+							{
+								// add terminator
+								$s .= ';';
+							}
+						}
+
+						$s .= $t;
+
+						$c++;
+						$lastType = $type;
+					}
+				}
+
+				if ($c > 1 && !$noBlockGrouping)
+				{
+					$s = '{' . $s . '}';
+				}
+			break;
+
+			case KEYWORD_IF:
+				$s = 'if(' . $this->parseTree($n->condition) . ')';
+				$thenPart = $this->parseTree($n->thenPart);
+				$elsePart = $n->elsePart ? $this->parseTree($n->elsePart) : null;
+
+				// empty if-statement
+				if ($thenPart == '')
+					$thenPart = ';';
+
+				if ($elsePart)
+				{
+					// be carefull and always make a block out of the thenPart; could be more optimized but is a lot of trouble
+					if ($thenPart != ';' && $thenPart[0] != '{')
+						$thenPart = '{' . $thenPart . '}';
+
+					$s .= $thenPart . 'else';
+
+					// we could check for more, but that hardly ever applies so go for performance
+					if ($elsePart[0] != '{')
+						$s .= ' ';
+
+					$s .= $elsePart;
+				}
+				else
+				{
+					$s .= $thenPart;
+				}
+			break;
+
+			case KEYWORD_SWITCH:
+				$s = 'switch(' . $this->parseTree($n->discriminant) . '){';
+				$cases = $n->cases;
+				for ($i = 0, $j = count($cases); $i < $j; $i++)
+				{
+					$case = $cases[$i];
+					if ($case->type == KEYWORD_CASE)
+						$s .= 'case' . ($case->caseLabel->type != TOKEN_STRING ? ' ' : '') . $this->parseTree($case->caseLabel) . ':';
+					else
+						$s .= 'default:';
+
+					$statement = $this->parseTree($case->statements, true);
+					if ($statement)
+					{
+						$s .= $statement;
+						// no terminator for last statement
+						if ($i + 1 < $j)
+							$s .= ';';
+					}
+				}
+				$s .= '}';
+			break;
+
+			case KEYWORD_FOR:
+				$s = 'for(' . ($n->setup ? $this->parseTree($n->setup) : '')
+					. ';' . ($n->condition ? $this->parseTree($n->condition) : '')
+					. ';' . ($n->update ? $this->parseTree($n->update) : '') . ')';
+
+				$body  = $this->parseTree($n->body);
+				if ($body == '')
+					$body = ';';
+
+				$s .= $body;
+			break;
+
+			case KEYWORD_WHILE:
+				$s = 'while(' . $this->parseTree($n->condition) . ')';
+
+				$body  = $this->parseTree($n->body);
+				if ($body == '')
+					$body = ';';
+
+				$s .= $body;
+			break;
+
+			case JS_FOR_IN:
+				$s = 'for(' . ($n->varDecl ? $this->parseTree($n->varDecl) : $this->parseTree($n->iterator)) . ' in ' . $this->parseTree($n->object) . ')';
+
+				$body  = $this->parseTree($n->body);
+				if ($body == '')
+					$body = ';';
+
+				$s .= $body;
+			break;
+
+			case KEYWORD_DO:
+				$s = 'do{' . $this->parseTree($n->body, true) . '}while(' . $this->parseTree($n->condition) . ')';
+			break;
+
+			case KEYWORD_BREAK:
+			case KEYWORD_CONTINUE:
+				$s = $n->value . ($n->label ? ' ' . $n->label : '');
+			break;
+
+			case KEYWORD_TRY:
+				$s = 'try{' . $this->parseTree($n->tryBlock, true) . '}';
+				$catchClauses = $n->catchClauses;
+				for ($i = 0, $j = count($catchClauses); $i < $j; $i++)
+				{
+					$t = $catchClauses[$i];
+					$s .= 'catch(' . $t->varName . ($t->guard ? ' if ' . $this->parseTree($t->guard) : '') . '){' . $this->parseTree($t->block, true) . '}';
+				}
+				if ($n->finallyBlock)
+					$s .= 'finally{' . $this->parseTree($n->finallyBlock, true) . '}';
+			break;
+
+			case KEYWORD_THROW:
+				$s = 'throw ' . $this->parseTree($n->exception);
+			break;
+
+			case KEYWORD_RETURN:
+				$s = 'return';
+				if ($n->value)
+				{
+					$t = $this->parseTree($n->value);
+					if (strlen($t))
+					{
+						if (	$t[0] != '(' && $t[0] != '[' && $t[0] != '{' &&
+							$t[0] != '"' && $t[0] != "'" && $t[0] != '/'
+						)
+							$s .= ' ';
+
+						$s .= $t;
+					}
+				}
+			break;
+
+			case KEYWORD_WITH:
+				$s = 'with(' . $this->parseTree($n->object) . ')' . $this->parseTree($n->body);
+			break;
+
+			case KEYWORD_VAR:
+			case KEYWORD_CONST:
+				$s = $n->value . ' ';
+				$childs = $n->treeNodes;
+				for ($i = 0, $j = count($childs); $i < $j; $i++)
+				{
+					$t = $childs[$i];
+					$s .= ($i ? ',' : '') . $t->name;
+					$u = $t->initializer;
+					if ($u)
+						$s .= '=' . $this->parseTree($u);
+				}
+			break;
+
+			case KEYWORD_DEBUGGER:
+				throw new Exception('NOT IMPLEMENTED: DEBUGGER');
+			break;
+
+			case TOKEN_CONDCOMMENT_START:
+			case TOKEN_CONDCOMMENT_END:
+				$s = $n->value . ($n->type == TOKEN_CONDCOMMENT_START ? ' ' : '');
+				$childs = $n->treeNodes;
+				for ($i = 0, $j = count($childs); $i < $j; $i++)
+					$s .= $this->parseTree($childs[$i]);
+			break;
+
+			case OP_SEMICOLON:
+				if ($expression = $n->expression)
+					$s = $this->parseTree($expression);
+			break;
+
+			case JS_LABEL:
+				$s = $n->label . ':' . $this->parseTree($n->statement);
+			break;
+
+			case OP_COMMA:
+				$childs = $n->treeNodes;
+				for ($i = 0, $j = count($childs); $i < $j; $i++)
+					$s .= ($i ? ',' : '') . $this->parseTree($childs[$i]);
+			break;
+
+			case OP_ASSIGN:
+				$s = $this->parseTree($n->treeNodes[0]) . $n->value . $this->parseTree($n->treeNodes[1]);
+			break;
+
+			case OP_HOOK:
+				$s = $this->parseTree($n->treeNodes[0]) . '?' . $this->parseTree($n->treeNodes[1]) . ':' . $this->parseTree($n->treeNodes[2]);
+			break;
+
+			case OP_OR: case OP_AND:
+			case OP_BITWISE_OR: case OP_BITWISE_XOR: case OP_BITWISE_AND:
+			case OP_EQ: case OP_NE: case OP_STRICT_EQ: case OP_STRICT_NE:
+			case OP_LT: case OP_LE: case OP_GE: case OP_GT:
+			case OP_LSH: case OP_RSH: case OP_URSH:
+			case OP_MUL: case OP_DIV: case OP_MOD:
+				$s = $this->parseTree($n->treeNodes[0]) . $n->type . $this->parseTree($n->treeNodes[1]);
+			break;
+
+			case OP_PLUS:
+			case OP_MINUS:
+				$left = $this->parseTree($n->treeNodes[0]);
+				$right = $this->parseTree($n->treeNodes[1]);
+
+				switch ($n->treeNodes[1]->type)
+				{
+					case OP_PLUS:
+					case OP_MINUS:
+					case OP_INCREMENT:
+					case OP_DECREMENT:
+					case OP_UNARY_PLUS:
+					case OP_UNARY_MINUS:
+						$s = $left . $n->type . ' ' . $right;
+					break;
+
+					case TOKEN_STRING:
+						//combine concatted strings with same quotestyle
+						if ($n->type == OP_PLUS && substr($left, -1) == $right[0])
+						{
+							$s = substr($left, 0, -1) . substr($right, 1);
+							break;
+						}
+					// FALL THROUGH
+
+					default:
+						$s = $left . $n->type . $right;
+				}
+			break;
+
+			case KEYWORD_IN:
+				$s = $this->parseTree($n->treeNodes[0]) . ' in ' . $this->parseTree($n->treeNodes[1]);
+			break;
+
+			case KEYWORD_INSTANCEOF:
+				$s = $this->parseTree($n->treeNodes[0]) . ' instanceof ' . $this->parseTree($n->treeNodes[1]);
+			break;
+
+			case KEYWORD_DELETE:
+				$s = 'delete ' . $this->parseTree($n->treeNodes[0]);
+			break;
+
+			case KEYWORD_VOID:
+				$s = 'void(' . $this->parseTree($n->treeNodes[0]) . ')';
+			break;
+
+			case KEYWORD_TYPEOF:
+				$s = 'typeof ' . $this->parseTree($n->treeNodes[0]);
+			break;
+
+			case OP_NOT:
+			case OP_BITWISE_NOT:
+			case OP_UNARY_PLUS:
+			case OP_UNARY_MINUS:
+				$s = $n->value . $this->parseTree($n->treeNodes[0]);
+			break;
+
+			case OP_INCREMENT:
+			case OP_DECREMENT:
+				if ($n->postfix)
+					$s = $this->parseTree($n->treeNodes[0]) . $n->value;
+				else
+					$s = $n->value . $this->parseTree($n->treeNodes[0]);
+			break;
+
+			case OP_DOT:
+				$s = $this->parseTree($n->treeNodes[0]) . '.' . $this->parseTree($n->treeNodes[1]);
+			break;
+
+			case JS_INDEX:
+				$s = $this->parseTree($n->treeNodes[0]);
+				// See if we can replace named index with a dot saving 3 bytes
+				if (	$n->treeNodes[0]->type == TOKEN_IDENTIFIER &&
+					$n->treeNodes[1]->type == TOKEN_STRING &&
+					$this->isValidIdentifier(substr($n->treeNodes[1]->value, 1, -1))
+				)
+					$s .= '.' . substr($n->treeNodes[1]->value, 1, -1);
+				else
+					$s .= '[' . $this->parseTree($n->treeNodes[1]) . ']';
+			break;
+
+			case JS_LIST:
+				$childs = $n->treeNodes;
+				for ($i = 0, $j = count($childs); $i < $j; $i++)
+					$s .= ($i ? ',' : '') . $this->parseTree($childs[$i]);
+			break;
+
+			case JS_CALL:
+				$s = $this->parseTree($n->treeNodes[0]) . '(' . $this->parseTree($n->treeNodes[1]) . ')';
+			break;
+
+			case KEYWORD_NEW:
+			case JS_NEW_WITH_ARGS:
+				$s = 'new ' . $this->parseTree($n->treeNodes[0]) . '(' . ($n->type == JS_NEW_WITH_ARGS ? $this->parseTree($n->treeNodes[1]) : '') . ')';
+			break;
+
+			case JS_ARRAY_INIT:
+				$s = '[';
+				$childs = $n->treeNodes;
+				for ($i = 0, $j = count($childs); $i < $j; $i++)
+				{
+					$s .= ($i ? ',' : '') . $this->parseTree($childs[$i]);
+				}
+				$s .= ']';
+			break;
+
+			case JS_OBJECT_INIT:
+				$s = '{';
+				$childs = $n->treeNodes;
+				for ($i = 0, $j = count($childs); $i < $j; $i++)
+				{
+					$t = $childs[$i];
+					if ($i)
+						$s .= ',';
+					if ($t->type == JS_PROPERTY_INIT)
+					{
+						// Ditch the quotes when the index is a valid identifier
+						if (	$t->treeNodes[0]->type == TOKEN_STRING &&
+							$this->isValidIdentifier(substr($t->treeNodes[0]->value, 1, -1))
+						)
+							$s .= substr($t->treeNodes[0]->value, 1, -1);
+						else
+							$s .= $t->treeNodes[0]->value;
+
+						$s .= ':' . $this->parseTree($t->treeNodes[1]);
+					}
+					else
+					{
+						$s .= $t->type == JS_GETTER ? 'get' : 'set';
+						$s .= ' ' . $t->name . '(';
+						$params = $t->params;
+						for ($i = 0, $j = count($params); $i < $j; $i++)
+							$s .= ($i ? ',' : '') . $params[$i];
+						$s .= '){' . $this->parseTree($t->body, true) . '}';
+					}
+				}
+				$s .= '}';
+			break;
+
+			case KEYWORD_NULL: case KEYWORD_THIS: case KEYWORD_TRUE: case KEYWORD_FALSE:
+			case TOKEN_IDENTIFIER: case TOKEN_NUMBER: case TOKEN_STRING: case TOKEN_REGEXP:
+				$s = $n->value;
+			break;
+
+			case JS_GROUP:
+				$s = '(' . $this->parseTree($n->treeNodes[0]) . ')';
+			break;
+
+			default:
+				throw new Exception('UNKNOWN TOKEN TYPE: ' . $n->type);
+		}
+
+		return $s;
+	}
+
+	private function isValidIdentifier($string)
+	{
+		return preg_match('/^[a-zA-Z_][a-zA-Z0-9_]*$/', $string) && !in_array($string, $this->reserved);
+	}
+}
+
+class JSParser
+{
+	private $t;
+
+	private $opPrecedence = array(
+		';' => 0,
+		',' => 1,
+		'=' => 2, '?' => 2, ':' => 2,
+		// The above all have to have the same precedence, see bug 330975
+		'||' => 4,
+		'&&' => 5,
+		'|' => 6,
+		'^' => 7,
+		'&' => 8,
+		'==' => 9, '!=' => 9, '===' => 9, '!==' => 9,
+		'<' => 10, '<=' => 10, '>=' => 10, '>' => 10, 'in' => 10, 'instanceof' => 10,
+		'<<' => 11, '>>' => 11, '>>>' => 11,
+		'+' => 12, '-' => 12,
+		'*' => 13, '/' => 13, '%' => 13,
+		'delete' => 14, 'void' => 14, 'typeof' => 14,
+		'!' => 14, '~' => 14, 'U+' => 14, 'U-' => 14,
+		'++' => 15, '--' => 15,
+		'new' => 16,
+		'.' => 17,
+		JS_NEW_WITH_ARGS => 0, JS_INDEX => 0, JS_CALL => 0,
+		JS_ARRAY_INIT => 0, JS_OBJECT_INIT => 0, JS_GROUP => 0
+	);
+
+	private $opArity = array(
+		',' => -2,
+		'=' => 2,
+		'?' => 3,
+		'||' => 2,
+		'&&' => 2,
+		'|' => 2,
+		'^' => 2,
+		'&' => 2,
+		'==' => 2, '!=' => 2, '===' => 2, '!==' => 2,
+		'<' => 2, '<=' => 2, '>=' => 2, '>' => 2, 'in' => 2, 'instanceof' => 2,
+		'<<' => 2, '>>' => 2, '>>>' => 2,
+		'+' => 2, '-' => 2,
+		'*' => 2, '/' => 2, '%' => 2,
+		'delete' => 1, 'void' => 1, 'typeof' => 1,
+		'!' => 1, '~' => 1, 'U+' => 1, 'U-' => 1,
+		'++' => 1, '--' => 1,
+		'new' => 1,
+		'.' => 2,
+		JS_NEW_WITH_ARGS => 2, JS_INDEX => 2, JS_CALL => 2,
+		JS_ARRAY_INIT => 1, JS_OBJECT_INIT => 1, JS_GROUP => 1,
+		TOKEN_CONDCOMMENT_START => 1, TOKEN_CONDCOMMENT_END => 1
+	);
+
+	public function __construct()
+	{
+		$this->t = new JSTokenizer();
+	}
+
+	public function parse($s, $f, $l)
+	{
+		// initialize tokenizer
+		$this->t->init($s, $f, $l);
+
+		$x = new JSCompilerContext(false);
+		$n = $this->Script($x);
+		if (!$this->t->isDone())
+			throw $this->t->newSyntaxError('Syntax error');
+
+		return $n;
+	}
+
+	private function Script($x)
+	{
+		$n = $this->Statements($x);
+		$n->type = JS_SCRIPT;
+		$n->funDecls = $x->funDecls;
+		$n->varDecls = $x->varDecls;
+
+		return $n;
+	}
+
+	private function Statements($x)
+	{
+		$n = new JSNode($this->t, JS_BLOCK);
+		array_push($x->stmtStack, $n);
+
+		while (!$this->t->isDone() && $this->t->peek() != OP_RIGHT_CURLY)
+			$n->addNode($this->Statement($x));
+
+		array_pop($x->stmtStack);
+
+		return $n;
+	}
+
+	private function Block($x)
+	{
+		$this->t->mustMatch(OP_LEFT_CURLY);
+		$n = $this->Statements($x);
+		$this->t->mustMatch(OP_RIGHT_CURLY);
+
+		return $n;
+	}
+
+	private function Statement($x)
+	{
+		$tt = $this->t->get();
+		$n2 = null;
+
+		// Cases for statements ending in a right curly return early, avoiding the
+		// common semicolon insertion magic after this switch.
+		switch ($tt)
+		{
+			case KEYWORD_FUNCTION:
+				return $this->FunctionDefinition(
+					$x,
+					true,
+					count($x->stmtStack) > 1 ? STATEMENT_FORM : DECLARED_FORM
+				);
+			break;
+
+			case OP_LEFT_CURLY:
+				$n = $this->Statements($x);
+				$this->t->mustMatch(OP_RIGHT_CURLY);
+			return $n;
+
+			case KEYWORD_IF:
+				$n = new JSNode($this->t);
+				$n->condition = $this->ParenExpression($x);
+				array_push($x->stmtStack, $n);
+				$n->thenPart = $this->Statement($x);
+				$n->elsePart = $this->t->match(KEYWORD_ELSE) ? $this->Statement($x) : null;
+				array_pop($x->stmtStack);
+			return $n;
+
+			case KEYWORD_SWITCH:
+				$n = new JSNode($this->t);
+				$this->t->mustMatch(OP_LEFT_PAREN);
+				$n->discriminant = $this->Expression($x);
+				$this->t->mustMatch(OP_RIGHT_PAREN);
+				$n->cases = array();
+				$n->defaultIndex = -1;
+
+				array_push($x->stmtStack, $n);
+
+				$this->t->mustMatch(OP_LEFT_CURLY);
+
+				while (($tt = $this->t->get()) != OP_RIGHT_CURLY)
+				{
+					switch ($tt)
+					{
+						case KEYWORD_DEFAULT:
+							if ($n->defaultIndex >= 0)
+								throw $this->t->newSyntaxError('More than one switch default');
+							// FALL THROUGH
+						case KEYWORD_CASE:
+							$n2 = new JSNode($this->t);
+							if ($tt == KEYWORD_DEFAULT)
+								$n->defaultIndex = count($n->cases);
+							else
+								$n2->caseLabel = $this->Expression($x, OP_COLON);
+								break;
+						default:
+							throw $this->t->newSyntaxError('Invalid switch case');
+					}
+
+					$this->t->mustMatch(OP_COLON);
+					$n2->statements = new JSNode($this->t, JS_BLOCK);
+					while (($tt = $this->t->peek()) != KEYWORD_CASE && $tt != KEYWORD_DEFAULT && $tt != OP_RIGHT_CURLY)
+						$n2->statements->addNode($this->Statement($x));
+
+					array_push($n->cases, $n2);
+				}
+
+				array_pop($x->stmtStack);
+			return $n;
+
+			case KEYWORD_FOR:
+				$n = new JSNode($this->t);
+				$n->isLoop = true;
+				$this->t->mustMatch(OP_LEFT_PAREN);
+
+				if (($tt = $this->t->peek()) != OP_SEMICOLON)
+				{
+					$x->inForLoopInit = true;
+					if ($tt == KEYWORD_VAR || $tt == KEYWORD_CONST)
+					{
+						$this->t->get();
+						$n2 = $this->Variables($x);
+					}
+					else
+					{
+						$n2 = $this->Expression($x);
+					}
+					$x->inForLoopInit = false;
+				}
+
+				if ($n2 && $this->t->match(KEYWORD_IN))
+				{
+					$n->type = JS_FOR_IN;
+					if ($n2->type == KEYWORD_VAR)
+					{
+						if (count($n2->treeNodes) != 1)
+						{
+							throw $this->t->SyntaxError(
+								'Invalid for..in left-hand side',
+								$this->t->filename,
+								$n2->lineno
+							);
+						}
+
+						// NB: n2[0].type == IDENTIFIER and n2[0].value == n2[0].name.
+						$n->iterator = $n2->treeNodes[0];
+						$n->varDecl = $n2;
+					}
+					else
+					{
+						$n->iterator = $n2;
+						$n->varDecl = null;
+					}
+
+					$n->object = $this->Expression($x);
+				}
+				else
+				{
+					$n->setup = $n2 ? $n2 : null;
+					$this->t->mustMatch(OP_SEMICOLON);
+					$n->condition = $this->t->peek() == OP_SEMICOLON ? null : $this->Expression($x);
+					$this->t->mustMatch(OP_SEMICOLON);
+					$n->update = $this->t->peek() == OP_RIGHT_PAREN ? null : $this->Expression($x);
+				}
+
+				$this->t->mustMatch(OP_RIGHT_PAREN);
+				$n->body = $this->nest($x, $n);
+			return $n;
+
+			case KEYWORD_WHILE:
+			        $n = new JSNode($this->t);
+			        $n->isLoop = true;
+			        $n->condition = $this->ParenExpression($x);
+			        $n->body = $this->nest($x, $n);
+			return $n;
+
+			case KEYWORD_DO:
+				$n = new JSNode($this->t);
+				$n->isLoop = true;
+				$n->body = $this->nest($x, $n, KEYWORD_WHILE);
+				$n->condition = $this->ParenExpression($x);
+				if (!$x->ecmaStrictMode)
+				{
+					// <script language="JavaScript"> (without version hints) may need
+					// automatic semicolon insertion without a newline after do-while.
+					// See http://bugzilla.mozilla.org/show_bug.cgi?id=238945.
+					$this->t->match(OP_SEMICOLON);
+					return $n;
+				}
+			break;
+
+			case KEYWORD_BREAK:
+			case KEYWORD_CONTINUE:
+				$n = new JSNode($this->t);
+
+				if ($this->t->peekOnSameLine() == TOKEN_IDENTIFIER)
+				{
+					$this->t->get();
+					$n->label = $this->t->currentToken()->value;
+				}
+
+				$ss = $x->stmtStack;
+				$i = count($ss);
+				$label = $n->label;
+				if ($label)
+				{
+					do
+					{
+						if (--$i < 0)
+							throw $this->t->newSyntaxError('Label not found');
+					}
+					while ($ss[$i]->label != $label);
+				}
+				else
+				{
+					do
+					{
+						if (--$i < 0)
+							throw $this->t->newSyntaxError('Invalid ' . $tt);
+					}
+					while (!$ss[$i]->isLoop && ($tt != KEYWORD_BREAK || $ss[$i]->type != KEYWORD_SWITCH));
+				}
+
+				$n->target = $ss[$i];
+			break;
+
+			case KEYWORD_TRY:
+				$n = new JSNode($this->t);
+				$n->tryBlock = $this->Block($x);
+				$n->catchClauses = array();
+
+				while ($this->t->match(KEYWORD_CATCH))
+				{
+					$n2 = new JSNode($this->t);
+					$this->t->mustMatch(OP_LEFT_PAREN);
+					$n2->varName = $this->t->mustMatch(TOKEN_IDENTIFIER)->value;
+
+					if ($this->t->match(KEYWORD_IF))
+					{
+						if ($x->ecmaStrictMode)
+							throw $this->t->newSyntaxError('Illegal catch guard');
+
+						if (count($n->catchClauses) && !end($n->catchClauses)->guard)
+							throw $this->t->newSyntaxError('Guarded catch after unguarded');
+
+						$n2->guard = $this->Expression($x);
+					}
+					else
+					{
+						$n2->guard = null;
+					}
+
+					$this->t->mustMatch(OP_RIGHT_PAREN);
+					$n2->block = $this->Block($x);
+					array_push($n->catchClauses, $n2);
+				}
+
+				if ($this->t->match(KEYWORD_FINALLY))
+					$n->finallyBlock = $this->Block($x);
+
+				if (!count($n->catchClauses) && !$n->finallyBlock)
+					throw $this->t->newSyntaxError('Invalid try statement');
+			return $n;
+
+			case KEYWORD_CATCH:
+			case KEYWORD_FINALLY:
+				throw $this->t->newSyntaxError($tt + ' without preceding try');
+
+			case KEYWORD_THROW:
+				$n = new JSNode($this->t);
+				$n->exception = $this->Expression($x);
+			break;
+
+			case KEYWORD_RETURN:
+				if (!$x->inFunction)
+					throw $this->t->newSyntaxError('Invalid return');
+
+				$n = new JSNode($this->t);
+				$tt = $this->t->peekOnSameLine();
+				if ($tt != TOKEN_END && $tt != TOKEN_NEWLINE && $tt != OP_SEMICOLON && $tt != OP_RIGHT_CURLY)
+					$n->value = $this->Expression($x);
+				else
+					$n->value = null;
+			break;
+
+			case KEYWORD_WITH:
+				$n = new JSNode($this->t);
+				$n->object = $this->ParenExpression($x);
+				$n->body = $this->nest($x, $n);
+			return $n;
+
+			case KEYWORD_VAR:
+			case KEYWORD_CONST:
+			        $n = $this->Variables($x);
+			break;
+
+			case TOKEN_CONDCOMMENT_START:
+			case TOKEN_CONDCOMMENT_END:
+				$n = new JSNode($this->t);
+			return $n;
+
+			case KEYWORD_DEBUGGER:
+				$n = new JSNode($this->t);
+			break;
+
+			case TOKEN_NEWLINE:
+			case OP_SEMICOLON:
+				$n = new JSNode($this->t, OP_SEMICOLON);
+				$n->expression = null;
+			return $n;
+
+			default:
+				if ($tt == TOKEN_IDENTIFIER)
+				{
+					$this->t->scanOperand = false;
+					$tt = $this->t->peek();
+					$this->t->scanOperand = true;
+					if ($tt == OP_COLON)
+					{
+						$label = $this->t->currentToken()->value;
+						$ss = $x->stmtStack;
+						for ($i = count($ss) - 1; $i >= 0; --$i)
+						{
+							if ($ss[$i]->label == $label)
+								throw $this->t->newSyntaxError('Duplicate label');
+						}
+
+						$this->t->get();
+						$n = new JSNode($this->t, JS_LABEL);
+						$n->label = $label;
+						$n->statement = $this->nest($x, $n);
+
+						return $n;
+					}
+				}
+
+				$n = new JSNode($this->t, OP_SEMICOLON);
+				$this->t->unget();
+				$n->expression = $this->Expression($x);
+				$n->end = $n->expression->end;
+			break;
+		}
+
+		if ($this->t->lineno == $this->t->currentToken()->lineno)
+		{
+			$tt = $this->t->peekOnSameLine();
+			if ($tt != TOKEN_END && $tt != TOKEN_NEWLINE && $tt != OP_SEMICOLON && $tt != OP_RIGHT_CURLY)
+				throw $this->t->newSyntaxError('Missing ; before statement');
+		}
+
+		$this->t->match(OP_SEMICOLON);
+
+		return $n;
+	}
+
+	private function FunctionDefinition($x, $requireName, $functionForm)
+	{
+		$f = new JSNode($this->t);
+
+		if ($f->type != KEYWORD_FUNCTION)
+			$f->type = ($f->value == 'get') ? JS_GETTER : JS_SETTER;
+
+		if ($this->t->match(TOKEN_IDENTIFIER))
+			$f->name = $this->t->currentToken()->value;
+		elseif ($requireName)
+			throw $this->t->newSyntaxError('Missing function identifier');
+
+		$this->t->mustMatch(OP_LEFT_PAREN);
+			$f->params = array();
+
+		while (($tt = $this->t->get()) != OP_RIGHT_PAREN)
+		{
+			if ($tt != TOKEN_IDENTIFIER)
+				throw $this->t->newSyntaxError('Missing formal parameter');
+
+			array_push($f->params, $this->t->currentToken()->value);
+
+			if ($this->t->peek() != OP_RIGHT_PAREN)
+				$this->t->mustMatch(OP_COMMA);
+		}
+
+		$this->t->mustMatch(OP_LEFT_CURLY);
+
+		$x2 = new JSCompilerContext(true);
+		$f->body = $this->Script($x2);
+
+		$this->t->mustMatch(OP_RIGHT_CURLY);
+		$f->end = $this->t->currentToken()->end;
+
+		$f->functionForm = $functionForm;
+		if ($functionForm == DECLARED_FORM)
+			array_push($x->funDecls, $f);
+
+		return $f;
+	}
+
+	private function Variables($x)
+	{
+		$n = new JSNode($this->t);
+
+		do
+		{
+			$this->t->mustMatch(TOKEN_IDENTIFIER);
+
+			$n2 = new JSNode($this->t);
+			$n2->name = $n2->value;
+
+			if ($this->t->match(OP_ASSIGN))
+			{
+				if ($this->t->currentToken()->assignOp)
+					throw $this->t->newSyntaxError('Invalid variable initialization');
+
+				$n2->initializer = $this->Expression($x, OP_COMMA);
+			}
+
+			$n2->readOnly = $n->type == KEYWORD_CONST;
+
+			$n->addNode($n2);
+			array_push($x->varDecls, $n2);
+		}
+		while ($this->t->match(OP_COMMA));
+
+		return $n;
+	}
+
+	private function Expression($x, $stop=false)
+	{
+		$operators = array();
+		$operands = array();
+		$n = false;
+
+		$bl = $x->bracketLevel;
+		$cl = $x->curlyLevel;
+		$pl = $x->parenLevel;
+		$hl = $x->hookLevel;
+
+		while (($tt = $this->t->get()) != TOKEN_END)
+		{
+			if ($tt == $stop &&
+				$x->bracketLevel == $bl &&
+				$x->curlyLevel == $cl &&
+				$x->parenLevel == $pl &&
+				$x->hookLevel == $hl
+			)
+			{
+				// Stop only if tt matches the optional stop parameter, and that
+				// token is not quoted by some kind of bracket.
+				break;
+			}
+
+			switch ($tt)
+			{
+				case OP_SEMICOLON:
+					// NB: cannot be empty, Statement handled that.
+					break 2;
+
+				case OP_HOOK:
+					if ($this->t->scanOperand)
+						break 2;
+
+					while (	!empty($operators) &&
+						$this->opPrecedence[end($operators)->type] > $this->opPrecedence[$tt]
+					)
+						$this->reduce($operators, $operands);
+
+					array_push($operators, new JSNode($this->t));
+
+					++$x->hookLevel;
+					$this->t->scanOperand = true;
+					$n = $this->Expression($x);
+
+					if (!$this->t->match(OP_COLON))
+						break 2;
+
+					--$x->hookLevel;
+					array_push($operands, $n);
+				break;
+
+				case OP_COLON:
+					if ($x->hookLevel)
+						break 2;
+
+					throw $this->t->newSyntaxError('Invalid label');
+				break;
+
+				case OP_ASSIGN:
+					if ($this->t->scanOperand)
+						break 2;
+
+					// Use >, not >=, for right-associative ASSIGN
+					while (	!empty($operators) &&
+						$this->opPrecedence[end($operators)->type] > $this->opPrecedence[$tt]
+					)
+						$this->reduce($operators, $operands);
+
+					array_push($operators, new JSNode($this->t));
+					end($operands)->assignOp = $this->t->currentToken()->assignOp;
+					$this->t->scanOperand = true;
+				break;
+
+				case KEYWORD_IN:
+					// An in operator should not be parsed if we're parsing the head of
+					// a for (...) loop, unless it is in the then part of a conditional
+					// expression, or parenthesized somehow.
+					if ($x->inForLoopInit && !$x->hookLevel &&
+						!$x->bracketLevel && !$x->curlyLevel &&
+						!$x->parenLevel
+					)
+						break 2;
+				// FALL THROUGH
+				case OP_COMMA:
+					// A comma operator should not be parsed if we're parsing the then part
+					// of a conditional expression unless it's parenthesized somehow.
+					if ($tt == OP_COMMA && $x->hookLevel &&
+						!$x->bracketLevel && !$x->curlyLevel &&
+						!$x->parenLevel
+					)
+						break 2;
+				// Treat comma as left-associative so reduce can fold left-heavy
+				// COMMA trees into a single array.
+				// FALL THROUGH
+				case OP_OR:
+				case OP_AND:
+				case OP_BITWISE_OR:
+				case OP_BITWISE_XOR:
+				case OP_BITWISE_AND:
+				case OP_EQ: case OP_NE: case OP_STRICT_EQ: case OP_STRICT_NE:
+				case OP_LT: case OP_LE: case OP_GE: case OP_GT:
+				case KEYWORD_INSTANCEOF:
+				case OP_LSH: case OP_RSH: case OP_URSH:
+				case OP_PLUS: case OP_MINUS:
+				case OP_MUL: case OP_DIV: case OP_MOD:
+				case OP_DOT:
+					if ($this->t->scanOperand)
+						break 2;
+
+					while (	!empty($operators) &&
+						$this->opPrecedence[end($operators)->type] >= $this->opPrecedence[$tt]
+					)
+						$this->reduce($operators, $operands);
+
+					if ($tt == OP_DOT)
+					{
+						$this->t->mustMatch(TOKEN_IDENTIFIER);
+						array_push($operands, new JSNode($this->t, OP_DOT, array_pop($operands), new JSNode($this->t)));
+					}
+					else
+					{
+						array_push($operators, new JSNode($this->t));
+						$this->t->scanOperand = true;
+					}
+				break;
+
+				case KEYWORD_DELETE: case KEYWORD_VOID: case KEYWORD_TYPEOF:
+				case OP_NOT: case OP_BITWISE_NOT: case OP_UNARY_PLUS: case OP_UNARY_MINUS:
+				case KEYWORD_NEW:
+					if (!$this->t->scanOperand)
+						break 2;
+
+					array_push($operators, new JSNode($this->t));
+				break;
+
+				case OP_INCREMENT: case OP_DECREMENT:
+					if ($this->t->scanOperand)
+					{
+						array_push($operators, new JSNode($this->t));  // prefix increment or decrement
+					}
+					else
+					{
+						// Don't cross a line boundary for postfix {in,de}crement.
+						$t = $this->t->tokens[($this->t->tokenIndex + $this->t->lookahead - 1) & 3];
+						if ($t && $t->lineno != $this->t->lineno)
+							break 2;
+
+						if (!empty($operators))
+						{
+							// Use >, not >=, so postfix has higher precedence than prefix.
+							while ($this->opPrecedence[end($operators)->type] > $this->opPrecedence[$tt])
+								$this->reduce($operators, $operands);
+						}
+
+						$n = new JSNode($this->t, $tt, array_pop($operands));
+						$n->postfix = true;
+						array_push($operands, $n);
+					}
+				break;
+
+				case KEYWORD_FUNCTION:
+					if (!$this->t->scanOperand)
+						break 2;
+
+					array_push($operands, $this->FunctionDefinition($x, false, EXPRESSED_FORM));
+					$this->t->scanOperand = false;
+				break;
+
+				case KEYWORD_NULL: case KEYWORD_THIS: case KEYWORD_TRUE: case KEYWORD_FALSE:
+				case TOKEN_IDENTIFIER: case TOKEN_NUMBER: case TOKEN_STRING: case TOKEN_REGEXP:
+					if (!$this->t->scanOperand)
+						break 2;
+
+					array_push($operands, new JSNode($this->t));
+					$this->t->scanOperand = false;
+				break;
+
+				case TOKEN_CONDCOMMENT_START:
+				case TOKEN_CONDCOMMENT_END:
+					if ($this->t->scanOperand)
+						array_push($operators, new JSNode($this->t));
+					else
+						array_push($operands, new JSNode($this->t));
+				break;
+
+				case OP_LEFT_BRACKET:
+					if ($this->t->scanOperand)
+					{
+						// Array initialiser.  Parse using recursive descent, as the
+						// sub-grammar here is not an operator grammar.
+						$n = new JSNode($this->t, JS_ARRAY_INIT);
+						while (($tt = $this->t->peek()) != OP_RIGHT_BRACKET)
+						{
+							if ($tt == OP_COMMA)
+							{
+								$this->t->get();
+								$n->addNode(null);
+								continue;
+							}
+
+							$n->addNode($this->Expression($x, OP_COMMA));
+							if (!$this->t->match(OP_COMMA))
+								break;
+						}
+
+						$this->t->mustMatch(OP_RIGHT_BRACKET);
+						array_push($operands, $n);
+						$this->t->scanOperand = false;
+					}
+					else
+					{
+						// Property indexing operator.
+						array_push($operators, new JSNode($this->t, JS_INDEX));
+						$this->t->scanOperand = true;
+						++$x->bracketLevel;
+					}
+				break;
+
+				case OP_RIGHT_BRACKET:
+					if ($this->t->scanOperand || $x->bracketLevel == $bl)
+						break 2;
+
+					while ($this->reduce($operators, $operands)->type != JS_INDEX)
+						continue;
+
+					--$x->bracketLevel;
+				break;
+
+				case OP_LEFT_CURLY:
+					if (!$this->t->scanOperand)
+						break 2;
+
+					// Object initialiser.  As for array initialisers (see above),
+					// parse using recursive descent.
+					++$x->curlyLevel;
+					$n = new JSNode($this->t, JS_OBJECT_INIT);
+					while (!$this->t->match(OP_RIGHT_CURLY))
+					{
+						do
+						{
+							$tt = $this->t->get();
+							$tv = $this->t->currentToken()->value;
+							if (($tv == 'get' || $tv == 'set') && $this->t->peek() == TOKEN_IDENTIFIER)
+							{
+								if ($x->ecmaStrictMode)
+									throw $this->t->newSyntaxError('Illegal property accessor');
+
+								$n->addNode($this->FunctionDefinition($x, true, EXPRESSED_FORM));
+							}
+							else
+							{
+								switch ($tt)
+								{
+									case TOKEN_IDENTIFIER:
+									case TOKEN_NUMBER:
+									case TOKEN_STRING:
+										$id = new JSNode($this->t);
+									break;
+
+									case OP_RIGHT_CURLY:
+										if ($x->ecmaStrictMode)
+											throw $this->t->newSyntaxError('Illegal trailing ,');
+									break 3;
+
+									default:
+										throw $this->t->newSyntaxError('Invalid property name');
+								}
+
+								$this->t->mustMatch(OP_COLON);
+								$n->addNode(new JSNode($this->t, JS_PROPERTY_INIT, $id, $this->Expression($x, OP_COMMA)));
+							}
+						}
+						while ($this->t->match(OP_COMMA));
+
+						$this->t->mustMatch(OP_RIGHT_CURLY);
+						break;
+					}
+
+					array_push($operands, $n);
+					$this->t->scanOperand = false;
+					--$x->curlyLevel;
+				break;
+
+				case OP_RIGHT_CURLY:
+					if (!$this->t->scanOperand && $x->curlyLevel != $cl)
+						throw new Exception('PANIC: right curly botch');
+				break 2;
+
+				case OP_LEFT_PAREN:
+					if ($this->t->scanOperand)
+					{
+						array_push($operators, new JSNode($this->t, JS_GROUP));
+					}
+					else
+					{
+						while (	!empty($operators) &&
+							$this->opPrecedence[end($operators)->type] > $this->opPrecedence[KEYWORD_NEW]
+						)
+							$this->reduce($operators, $operands);
+
+						// Handle () now, to regularize the n-ary case for n > 0.
+						// We must set scanOperand in case there are arguments and
+						// the first one is a regexp or unary+/-.
+						$n = end($operators);
+						$this->t->scanOperand = true;
+						if ($this->t->match(OP_RIGHT_PAREN))
+						{
+							if ($n && $n->type == KEYWORD_NEW)
+							{
+								array_pop($operators);
+								$n->addNode(array_pop($operands));
+							}
+							else
+							{
+								$n = new JSNode($this->t, JS_CALL, array_pop($operands), new JSNode($this->t, JS_LIST));
+							}
+
+							array_push($operands, $n);
+							$this->t->scanOperand = false;
+							break;
+						}
+
+						if ($n && $n->type == KEYWORD_NEW)
+							$n->type = JS_NEW_WITH_ARGS;
+						else
+							array_push($operators, new JSNode($this->t, JS_CALL));
+					}
+
+					++$x->parenLevel;
+				break;
+
+				case OP_RIGHT_PAREN:
+					if ($this->t->scanOperand || $x->parenLevel == $pl)
+						break 2;
+
+					while (($tt = $this->reduce($operators, $operands)->type) != JS_GROUP &&
+						$tt != JS_CALL && $tt != JS_NEW_WITH_ARGS
+					)
+					{
+						continue;
+					}
+
+					if ($tt != JS_GROUP)
+					{
+						$n = end($operands);
+						if ($n->treeNodes[1]->type != OP_COMMA)
+							$n->treeNodes[1] = new JSNode($this->t, JS_LIST, $n->treeNodes[1]);
+						else
+							$n->treeNodes[1]->type = JS_LIST;
+					}
+
+					--$x->parenLevel;
+				break;
+
+				// Automatic semicolon insertion means we may scan across a newline
+				// and into the beginning of another statement.  If so, break out of
+				// the while loop and let the t.scanOperand logic handle errors.
+				default:
+					break 2;
+			}
+		}
+
+		if ($x->hookLevel != $hl)
+			throw $this->t->newSyntaxError('Missing : in conditional expression');
+
+		if ($x->parenLevel != $pl)
+			throw $this->t->newSyntaxError('Missing ) in parenthetical');
+
+		if ($x->bracketLevel != $bl)
+			throw $this->t->newSyntaxError('Missing ] in index expression');
+
+		if ($this->t->scanOperand)
+			throw $this->t->newSyntaxError('Missing operand');
+
+		// Resume default mode, scanning for operands, not operators.
+		$this->t->scanOperand = true;
+		$this->t->unget();
+
+		while (count($operators))
+			$this->reduce($operators, $operands);
+
+		return array_pop($operands);
+	}
+
+	private function ParenExpression($x)
+	{
+		$this->t->mustMatch(OP_LEFT_PAREN);
+		$n = $this->Expression($x);
+		$this->t->mustMatch(OP_RIGHT_PAREN);
+
+		return $n;
+	}
+
+	// Statement stack and nested statement handler.
+	private function nest($x, $node, $end = false)
+	{
+		array_push($x->stmtStack, $node);
+		$n = $this->statement($x);
+		array_pop($x->stmtStack);
+
+		if ($end)
+			$this->t->mustMatch($end);
+
+		return $n;
+	}
+
+	private function reduce(&$operators, &$operands)
+	{
+		$n = array_pop($operators);
+		$op = $n->type;
+		$arity = $this->opArity[$op];
+		$c = count($operands);
+		if ($arity == -2)
+		{
+			// Flatten left-associative trees
+			if ($c >= 2)
+			{
+				$left = $operands[$c - 2];
+				if ($left->type == $op)
+				{
+					$right = array_pop($operands);
+					$left->addNode($right);
+					return $left;
+				}
+			}
+			$arity = 2;
+		}
+
+		// Always use push to add operands to n, to update start and end
+		$a = array_splice($operands, $c - $arity);
+		for ($i = 0; $i < $arity; $i++)
+			$n->addNode($a[$i]);
+
+		// Include closing bracket or postfix operator in [start,end]
+		$te = $this->t->currentToken()->end;
+		if ($n->end < $te)
+			$n->end = $te;
+
+		array_push($operands, $n);
+
+		return $n;
+	}
+}
+
+class JSCompilerContext
+{
+	public $inFunction = false;
+	public $inForLoopInit = false;
+	public $ecmaStrictMode = false;
+	public $bracketLevel = 0;
+	public $curlyLevel = 0;
+	public $parenLevel = 0;
+	public $hookLevel = 0;
+
+	public $stmtStack = array();
+	public $funDecls = array();
+	public $varDecls = array();
+
+	public function __construct($inFunction)
+	{
+		$this->inFunction = $inFunction;
+	}
+}
+
+class JSNode
+{
+	private $type;
+	private $value;
+	private $lineno;
+	private $start;
+	private $end;
+
+	public $treeNodes = array();
+	public $funDecls = array();
+	public $varDecls = array();
+
+	public function __construct($t, $type=0)
+	{
+		if ($token = $t->currentToken())
+		{
+			$this->type = $type ? $type : $token->type;
+			$this->value = $token->value;
+			$this->lineno = $token->lineno;
+			$this->start = $token->start;
+			$this->end = $token->end;
+		}
+		else
+		{
+			$this->type = $type;
+			$this->lineno = $t->lineno;
+		}
+
+		if (($numargs = func_num_args()) > 2)
+		{
+			$args = func_get_args();
+			for ($i = 2; $i < $numargs; $i++)
+				$this->addNode($args[$i]);
+		}
+	}
+
+	// we don't want to bloat our object with all kind of specific properties, so we use overloading
+	public function __set($name, $value)
+	{
+		$this->$name = $value;
+	}
+
+	public function __get($name)
+	{
+		if (isset($this->$name))
+			return $this->$name;
+
+		return null;
+	}
+
+	public function addNode($node)
+	{
+		if ($node !== null)
+		{
+			if ($node->start < $this->start)
+				$this->start = $node->start;
+			if ($this->end < $node->end)
+				$this->end = $node->end;
+		}
+
+		$this->treeNodes[] = $node;
+	}
+}
+
+class JSTokenizer
+{
+	private $cursor = 0;
+	private $source;
+
+	public $tokens = array();
+	public $tokenIndex = 0;
+	public $lookahead = 0;
+	public $scanNewlines = false;
+	public $scanOperand = true;
+
+	public $filename;
+	public $lineno;
+
+	private $keywords = array(
+		'break',
+		'case', 'catch', 'const', 'continue',
+		'debugger', 'default', 'delete', 'do',
+		'else', 'enum',
+		'false', 'finally', 'for', 'function',
+		'if', 'in', 'instanceof',
+		'new', 'null',
+		'return',
+		'switch',
+		'this', 'throw', 'true', 'try', 'typeof',
+		'var', 'void',
+		'while', 'with'
+	);
+
+	private $opTypeNames = array(
+		';'	=> 'SEMICOLON',
+		','	=> 'COMMA',
+		'?'	=> 'HOOK',
+		':'	=> 'COLON',
+		'||'	=> 'OR',
+		'&&'	=> 'AND',
+		'|'	=> 'BITWISE_OR',
+		'^'	=> 'BITWISE_XOR',
+		'&'	=> 'BITWISE_AND',
+		'==='	=> 'STRICT_EQ',
+		'=='	=> 'EQ',
+		'='	=> 'ASSIGN',
+		'!=='	=> 'STRICT_NE',
+		'!='	=> 'NE',
+		'<<'	=> 'LSH',
+		'<='	=> 'LE',
+		'<'	=> 'LT',
+		'>>>'	=> 'URSH',
+		'>>'	=> 'RSH',
+		'>='	=> 'GE',
+		'>'	=> 'GT',
+		'++'	=> 'INCREMENT',
+		'--'	=> 'DECREMENT',
+		'+'	=> 'PLUS',
+		'-'	=> 'MINUS',
+		'*'	=> 'MUL',
+		'/'	=> 'DIV',
+		'%'	=> 'MOD',
+		'!'	=> 'NOT',
+		'~'	=> 'BITWISE_NOT',
+		'.'	=> 'DOT',
+		'['	=> 'LEFT_BRACKET',
+		']'	=> 'RIGHT_BRACKET',
+		'{'	=> 'LEFT_CURLY',
+		'}'	=> 'RIGHT_CURLY',
+		'('	=> 'LEFT_PAREN',
+		')'	=> 'RIGHT_PAREN',
+		'@*/'	=> 'CONDCOMMENT_END'
+	);
+
+	private $assignOps = array('|', '^', '&', '<<', '>>', '>>>', '+', '-', '*', '/', '%');
+	private $opRegExp;
+
+	public function __construct()
+	{
+		$this->opRegExp = '#^(' . implode('|', array_map('preg_quote', array_keys($this->opTypeNames))) . ')#';
+	}
+
+	public function init($source, $filename = '', $lineno = 1)
+	{
+		$this->source = $source;
+		$this->filename = $filename ? $filename : '[inline]';
+		$this->lineno = $lineno;
+
+		$this->cursor = 0;
+		$this->tokens = array();
+		$this->tokenIndex = 0;
+		$this->lookahead = 0;
+		$this->scanNewlines = false;
+		$this->scanOperand = true;
+	}
+
+	public function getInput($chunksize)
+	{
+		if ($chunksize)
+			return substr($this->source, $this->cursor, $chunksize);
+
+		return substr($this->source, $this->cursor);
+	}
+
+	public function isDone()
+	{
+		return $this->peek() == TOKEN_END;
+	}
+
+	public function match($tt)
+	{
+		return $this->get() == $tt || $this->unget();
+	}
+
+	public function mustMatch($tt)
+	{
+	        if (!$this->match($tt))
+			throw $this->newSyntaxError('Unexpected token; token ' . $tt . ' expected');
+
+		return $this->currentToken();
+	}
+
+	public function peek()
+	{
+		if ($this->lookahead)
+		{
+			$next = $this->tokens[($this->tokenIndex + $this->lookahead) & 3];
+			if ($this->scanNewlines && $next->lineno != $this->lineno)
+				$tt = TOKEN_NEWLINE;
+			else
+				$tt = $next->type;
+		}
+		else
+		{
+			$tt = $this->get();
+			$this->unget();
+		}
+
+		return $tt;
+	}
+
+	public function peekOnSameLine()
+	{
+		$this->scanNewlines = true;
+		$tt = $this->peek();
+		$this->scanNewlines = false;
+
+		return $tt;
+	}
+
+	public function currentToken()
+	{
+		if (!empty($this->tokens))
+			return $this->tokens[$this->tokenIndex];
+	}
+
+	public function get($chunksize = 1000)
+	{
+		while($this->lookahead)
+		{
+			$this->lookahead--;
+			$this->tokenIndex = ($this->tokenIndex + 1) & 3;
+			$token = $this->tokens[$this->tokenIndex];
+			if ($token->type != TOKEN_NEWLINE || $this->scanNewlines)
+				return $token->type;
+		}
+
+		$conditional_comment = false;
+
+		// strip whitespace and comments
+		while(true)
+		{
+			$input = $this->getInput($chunksize);
+
+			// whitespace handling; gobble up \r as well (effectively we don't have support for MAC newlines!)
+			$re = $this->scanNewlines ? '/^[ \r\t]+/' : '/^\s+/';
+			if (preg_match($re, $input, $match))
+			{
+				$spaces = $match[0];
+				$spacelen = strlen($spaces);
+				$this->cursor += $spacelen;
+				if (!$this->scanNewlines)
+					$this->lineno += substr_count($spaces, "\n");
+
+				if ($spacelen == $chunksize)
+					continue; // complete chunk contained whitespace
+
+				$input = $this->getInput($chunksize);
+				if ($input == '' || $input[0] != '/')
+					break;
+			}
+
+			// Comments
+			if (!preg_match('/^\/(?:\*(@(?:cc_on|if|elif|else|end))?.*?\*\/|\/[^\n]*)/s', $input, $match))
+			{
+				if (!$chunksize)
+					break;
+
+				// retry with a full chunk fetch; this also prevents breakage of long regular expressions (which will never match a comment)
+				$chunksize = null;
+				continue;
+			}
+
+			// check if this is a conditional (JScript) comment
+			if (!empty($match[1]))
+			{
+				$match[0] = '/*' . $match[1];
+				$conditional_comment = true;
+				break;
+			}
+			else
+			{
+				$this->cursor += strlen($match[0]);
+				$this->lineno += substr_count($match[0], "\n");
+			}
+		}
+
+		if ($input == '')
+		{
+			$tt = TOKEN_END;
+			$match = array('');
+		}
+		elseif ($conditional_comment)
+		{
+			$tt = TOKEN_CONDCOMMENT_START;
+		}
+		else
+		{
+			switch ($input[0])
+			{
+				case '0': case '1': case '2': case '3': case '4':
+				case '5': case '6': case '7': case '8': case '9':
+					if (preg_match('/^\d+\.\d*(?:[eE][-+]?\d+)?|^\d+(?:\.\d*)?[eE][-+]?\d+/', $input, $match))
+					{
+						$tt = TOKEN_NUMBER;
+					}
+					else if (preg_match('/^0[xX][\da-fA-F]+|^0[0-7]*|^\d+/', $input, $match))
+					{
+						// this should always match because of \d+
+						$tt = TOKEN_NUMBER;
+					}
+				break;
+
+				case '"':
+				case "'":
+					if (preg_match('/^"(?:\\\\(?:.|\r?\n)|[^\\\\"\r\n]+)*"|^\'(?:\\\\(?:.|\r?\n)|[^\\\\\'\r\n]+)*\'/', $input, $match))
+					{
+						$tt = TOKEN_STRING;
+					}
+					else
+					{
+						if ($chunksize)
+							return $this->get(null); // retry with a full chunk fetch
+
+						throw $this->newSyntaxError('Unterminated string literal');
+					}
+				break;
+
+				case '/':
+					if ($this->scanOperand && preg_match('/^\/((?:\\\\.|\[(?:\\\\.|[^\]])*\]|[^\/])+)\/([gimy]*)/', $input, $match))
+					{
+						$tt = TOKEN_REGEXP;
+						break;
+					}
+				// FALL THROUGH
+
+				case '|':
+				case '^':
+				case '&':
+				case '<':
+				case '>':
+				case '+':
+				case '-':
+				case '*':
+				case '%':
+				case '=':
+				case '!':
+					// should always match
+					preg_match($this->opRegExp, $input, $match);
+					$op = $match[0];
+					if (in_array($op, $this->assignOps) && $input[strlen($op)] == '=')
+					{
+						$tt = OP_ASSIGN;
+						$match[0] .= '=';
+					}
+					else
+					{
+						$tt = $op;
+						if ($this->scanOperand)
+						{
+							if ($op == OP_PLUS)
+								$tt = OP_UNARY_PLUS;
+							elseif ($op == OP_MINUS)
+								$tt = OP_UNARY_MINUS;
+						}
+						$op = null;
+					}
+				break;
+
+				case '.':
+					if (preg_match('/^\.\d+(?:[eE][-+]?\d+)?/', $input, $match))
+					{
+						$tt = TOKEN_NUMBER;
+						break;
+					}
+				// FALL THROUGH
+
+				case ';':
+				case ',':
+				case '?':
+				case ':':
+				case '~':
+				case '[':
+				case ']':
+				case '{':
+				case '}':
+				case '(':
+				case ')':
+					// these are all single
+					$match = array($input[0]);
+					$tt = $input[0];
+				break;
+
+				case '@':
+					// check end of conditional comment
+					if (substr($input, 0, 3) == '@*/')
+					{
+						$match = array('@*/');
+						$tt = TOKEN_CONDCOMMENT_END;
+					}
+					else
+						throw $this->newSyntaxError('Illegal token');
+				break;
+
+				case "\n":
+					if ($this->scanNewlines)
+					{
+						$match = array("\n");
+						$tt = TOKEN_NEWLINE;
+					}
+					else
+						throw $this->newSyntaxError('Illegal token');
+				break;
+
+				default:
+					// Fast path for identifiers: word chars followed by whitespace or various other tokens.
+					// Note we don't need to exclude digits in the first char, as they've already been found
+					// above.
+					if (!preg_match('/^[$\w]+(?=[\s\/\|\^\&<>\+\-\*%=!.;,\?:~\[\]\{\}\(\)@])/', $input, $match))
+					{
+						// Character classes per ECMA-262 edition 5.1 section 7.6
+						// Per spec, must accept Unicode 3.0, *may* accept later versions.
+						// We'll take whatever PCRE understands, which should be more recent.
+						$identifierStartChars = "\\p{L}\\p{Nl}" .  # UnicodeLetter
+						                        "\$" .
+						                        "_";
+						$identifierPartChars  = $identifierStartChars .
+						                        "\\p{Mn}\\p{Mc}" . # UnicodeCombiningMark
+						                        "\\p{Nd}" .        # UnicodeDigit
+						                        "\\p{Pc}";         # UnicodeConnectorPunctuation
+						$unicodeEscape = "\\\\u[0-9A-F-a-f]{4}";
+						$identifierRegex = "/^" .
+						                   "(?:[$identifierStartChars]|$unicodeEscape)" .
+						                   "(?:[$identifierPartChars]|$unicodeEscape)*" .
+						                   "/uS";
+						if (preg_match($identifierRegex, $input, $match))
+						{
+							if (strpos($match[0], '\\') !== false) {
+								// Per ECMA-262 edition 5.1, section 7.6 escape sequences should behave as if they were
+								// the original chars, but only within the boundaries of the identifier.
+								$decoded = preg_replace_callback('/\\\\u([0-9A-Fa-f]{4})/',
+										array(__CLASS__, 'unicodeEscapeCallback'),
+										$match[0]);
+
+								// Since our original regex didn't de-escape the originals, we need to check for validity again.
+								// No need to worry about token boundaries, as anything outside the identifier is illegal!
+								if (!preg_match("/^[$identifierStartChars][$identifierPartChars]*$/u", $decoded)) {
+									throw $this->newSyntaxError('Illegal token');
+								}
+
+								// Per spec it _ought_ to work to use these escapes for keywords words as well...
+								// but IE rejects them as invalid, while Firefox and Chrome treat them as identifiers
+								// that don't match the keyword.
+								if (in_array($decoded, $this->keywords)) {
+									throw $this->newSyntaxError('Illegal token');
+								}
+
+								// TODO: save the decoded form for output?
+							}
+						}
+						else
+							throw $this->newSyntaxError('Illegal token');
+					}
+					$tt = in_array($match[0], $this->keywords) ? $match[0] : TOKEN_IDENTIFIER;
+			}
+		}
+
+		$this->tokenIndex = ($this->tokenIndex + 1) & 3;
+
+		if (!isset($this->tokens[$this->tokenIndex]))
+			$this->tokens[$this->tokenIndex] = new JSToken();
+
+		$token = $this->tokens[$this->tokenIndex];
+		$token->type = $tt;
+
+		if ($tt == OP_ASSIGN)
+			$token->assignOp = $op;
+
+		$token->start = $this->cursor;
+
+		$token->value = $match[0];
+		$this->cursor += strlen($match[0]);
+
+		$token->end = $this->cursor;
+		$token->lineno = $this->lineno;
+
+		return $tt;
+	}
+
+	public function unget()
+	{
+		if (++$this->lookahead == 4)
+			throw $this->newSyntaxError('PANIC: too much lookahead!');
+
+		$this->tokenIndex = ($this->tokenIndex - 1) & 3;
+	}
+
+	public function newSyntaxError($m)
+	{
+		return new Exception('Parse error: ' . $m . ' in file \'' . $this->filename . '\' on line ' . $this->lineno);
+	}
+
+	public static function unicodeEscapeCallback($m)
+	{
+		return html_entity_decode('&#x' . $m[1]. ';', ENT_QUOTES, 'UTF-8');
+	}
+}
+
+class JSToken
+{
+	public $type;
+	public $value;
+	public $start;
+	public $end;
+	public $lineno;
+	public $assignOp;
+}
+
diff --git a/includes/libs/spyc.php b/includes/libs/spyc.php
deleted file mode 100644
index bc92e869..00000000
--- a/includes/libs/spyc.php
+++ /dev/null
@@ -1,248 +0,0 @@
-<?php
-/**
- * Spyc -- A Simple PHP YAML Class
- *
- * @file
- * @version 0.2.3 -- 2006-02-04
- * @author Chris Wanstrath <chris@ozmm.org>
- * @see http://spyc.sourceforge.net/
- * @copyright Copyright 2005-2006 Chris Wanstrath
- * @license http://www.opensource.org/licenses/mit-license.php MIT License
- */
-
-/**
- * The Simple PHP YAML Class.
- *
- * This class can be used to read a YAML file and convert its contents
- * into a PHP array.  It currently supports a very limited subsection of
- * the YAML spec.
- *
- * @ingroup API
- */
-class Spyc {
-
-	/**
-	 * Dump YAML from PHP array statically
-	 *
-	 * The dump method, when supplied with an array, will do its best
-	 * to convert the array into friendly YAML.  Pretty simple.  Feel free to
-	 * save the returned string as nothing.yml and pass it around.
-	 *
-	 * Oh, and you can decide how big the indent is and what the wordwrap
-	 * for folding is.  Pretty cool -- just pass in 'false' for either if
-	 * you want to use the default.
-	 *
-	 * Indent's default is 2 spaces, wordwrap's default is 40 characters.  And
-	 * you can turn off wordwrap by passing in 0.
-	 *
-	 * @param $array Array: PHP array
-	 * @param $indent Integer: Pass in false to use the default, which is 2
-	 * @param $wordwrap Integer: Pass in 0 for no wordwrap, false for default (40)
-	 * @return String
-	 */
-	public static function YAMLDump( $array, $indent = false, $wordwrap = false ) {
-		$spyc = new Spyc;
-		return $spyc->dump( $array, $indent, $wordwrap );
-	}
-
-	/**
-	 * Dump PHP array to YAML
-	 *
-	 * The dump method, when supplied with an array, will do its best
-	 * to convert the array into friendly YAML.  Pretty simple.  Feel free to
-	 * save the returned string as tasteful.yml and pass it around.
-	 *
-	 * Oh, and you can decide how big the indent is and what the wordwrap
-	 * for folding is.  Pretty cool -- just pass in 'false' for either if
-	 * you want to use the default.
-	 *
-	 * Indent's default is 2 spaces, wordwrap's default is 40 characters.  And
-	 * you can turn off wordwrap by passing in 0.
-	 *
-	 * @param $array Array: PHP array
-	 * @param $indent Integer: Pass in false to use the default, which is 2
-	 * @param $wordwrap Integer: Pass in 0 for no wordwrap, false for default (40)
-	 * @return String
-	 */
-	public function dump( $array, $indent = false, $wordwrap = false ) {
-		// Dumps to some very clean YAML.  We'll have to add some more features
-		// and options soon.  And better support for folding.
-
-		// New features and options.
-		if ( $indent === false or !is_numeric( $indent ) ) {
-			$this->_dumpIndent = 2;
-		} else {
-			$this->_dumpIndent = $indent;
-		}
-
-		if ( $wordwrap === false or !is_numeric( $wordwrap ) ) {
-			$this->_dumpWordWrap = 40;
-		} else {
-			$this->_dumpWordWrap = $wordwrap;
-		}
-
-		// New YAML document
-		$string = "---\n";
-
-		// Start at the base of the array and move through it.
-		foreach ( $array as $key => $value ) {
-			$string .= $this->_yamlize( $key, $value, 0 );
-		}
-		return $string;
-	}
-
-	/**** Private Properties ****/
-
-	/**
-	 * Unused variables, but just commented rather than deleting
-	 * to save altering the library
-	private $_haveRefs;
-	private $_allNodes;
-	private $_lastIndent;
-	private $_lastNode;
-	private $_inBlock;
-	private $_isInline;
-	**/
-	private $_dumpIndent;
-	private $_dumpWordWrap;
-
-	/**** Private Methods ****/
-
-	/**
-	 * Attempts to convert a key / value array item to YAML
-	 *
-	 * @param $key Mixed: the name of the key
-	 * @param $value Mixed: the value of the item
-	 * @param $indent Integer: the indent of the current node
-	 * @return String
-	 */
-	private function _yamlize( $key, $value, $indent ) {
-		if ( is_array( $value ) ) {
-			// It has children.  What to do?
-			// Make it the right kind of item
-			$string = $this->_dumpNode( $key, null, $indent );
-			// Add the indent
-			$indent += $this->_dumpIndent;
-			// Yamlize the array
-			$string .= $this->_yamlizeArray( $value, $indent );
-		} elseif ( !is_array( $value ) ) {
-			// It doesn't have children.  Yip.
-			$string = $this->_dumpNode( $key, $value, $indent );
-		}
-		return $string;
-	}
-
-	/**
-	 * Attempts to convert an array to YAML
-	 *
-	 * @param $array Array: the array you want to convert
-	 * @param $indent Integer: the indent of the current level
-	 * @return String
-	 */
-	private function _yamlizeArray( $array, $indent ) {
-		if ( is_array( $array ) ) {
-			$string = '';
-			foreach ( $array as $key => $value ) {
-				$string .= $this->_yamlize( $key, $value, $indent );
-			}
-			return $string;
-		} else {
-			return false;
-		}
-    }
-
-	/**
-	 * Find out whether a string needs to be output as a literal rather than in plain style.
-	 * Added by Roan Kattouw 13-03-2008
-	 *
-	 * @param $value String: the string to check
-	 * @return Boolean
-	 */
-	function _needLiteral( $value ) {
-		// Check whether the string contains # or : or begins with any of:
-		// [ - ? , [ ] { } ! * & | > ' " % @ ` ]
-		// or is a number or contains newlines
-		return (bool)( gettype( $value ) == "string" &&
-			( is_numeric( $value )  ||
-			strpos( $value, "\n" ) ||
-			preg_match( "/[#:]/", $value ) ||
-			preg_match( "/^[-?,[\]{}!*&|>'\"%@`]/", $value ) ) );
-	}
-
-	/**
-	 * Returns YAML from a key and a value
-	 *
-	 * @param $key Mixed: the name of the key
-	 * @param $value Mixed: the value of the item
-	 * @param $indent Integer: the indent of the current node
-	 * @return String
-	 */
-	private function _dumpNode( $key, $value, $indent ) {
-		// do some folding here, for blocks
-		if ( $this->_needLiteral( $value ) ) {
-			$value = $this->_doLiteralBlock( $value, $indent );
-		} else {
-			$value = $this->_doFolding( $value, $indent );
-		}
-
-		$spaces = str_repeat( ' ', $indent );
-
-		if ( is_int( $key ) ) {
-			// It's a sequence
-			if ( $value !== '' && !is_null( $value ) )
-				$string = $spaces . '- ' . $value . "\n";
-			else
-				$string = $spaces . "-\n";
-		} else {
-			 if ( $key == '*' ) // bug 21922 - Quote asterix used as keys
-				$key = "'*'";
-
-			// It's mapped
-			if ( $value !== '' && !is_null( $value ) )
-				$string = $spaces . $key . ': ' . $value . "\n";
-			else
-				$string = $spaces . $key . ":\n";
-		}
-		return $string;
-	}
-
-	/**
-	 * Creates a literal block for dumping
-	 *
-	 * @param $value String
-	 * @param $indent Integer: the value of the indent
-	 * @return String
-	 */
-	private function _doLiteralBlock( $value, $indent ) {
-		$exploded = explode( "\n", $value );
-		$newValue = '|-';
-		$indent  += $this->_dumpIndent;
-		$spaces   = str_repeat( ' ', $indent );
-		foreach ( $exploded as $line ) {
-			$newValue .= "\n" . $spaces . trim( $line );
-		}
-		return $newValue;
-	}
-
-	/**
-	 * Folds a string of text, if necessary
-	 *
-	 * @param $value String: the string you wish to fold
-	 * @param $indent Integer: the indent of the current node
-	 * @return String
-	 */
-	private function _doFolding( $value, $indent ) {
-		// Don't do anything if wordwrap is set to 0
-		if ( $this->_dumpWordWrap === 0 ) {
-			return $value;
-		}
-
-		if ( strlen( $value ) > $this->_dumpWordWrap ) {
-			$indent += $this->_dumpIndent;
-			$indent = str_repeat( ' ', $indent );
-			$wrapped = wordwrap( $value, $this->_dumpWordWrap, "\n$indent" );
-			$value   = ">-\n" . $indent . $wrapped;
-		}
-		return $value;
-	}
-}
-- 
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