<?php
/**
 * CssMin - A (simple) css minifier with benefits
 *
 * --
 * Copyright (c) 2011 Joe Scylla <joe.scylla@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * --
 *
 * @package		CssMin
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

/**
 * Abstract definition of a CSS token class.
 *
 * Every token has to extend this class.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssToken
	{
	/**
	 * Returns the token as string.
	 *
	 * @return string
	 */
	abstract public function __toString();
	}

/**
 * Abstract definition of a for a ruleset start token.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssRulesetStartToken extends aCssToken
	{

	}

/**
 * Abstract definition of a for ruleset end token.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssRulesetEndToken extends aCssToken
	{
	/**
	 * Implements {@link aCssToken::__toString()}.
	 *
	 * @return string
	 */
	public function __toString()
		{
		return "}";
		}
	}

/**
 * Abstract definition of a parser plugin.
 *
 * Every parser plugin have to extend this class. A parser plugin contains the logic to parse one or aspects of a
 * stylesheet.
 *
 * @package		CssMin/Parser/Plugins
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssParserPlugin
	{
	/**
	 * Plugin configuration.
	 *
	 * @var array
	 */
	protected $configuration = array();
	/**
	 * The CssParser of the plugin.
	 *
	 * @var CssParser
	 */
	protected $parser = null;
	/**
	 * Plugin buffer.
	 *
	 * @var string
	 */
	protected $buffer = "";
	/**
	 * Constructor.
	 *
	 * @param CssParser $parser The CssParser object of this plugin.
	 * @param array $configuration Plugin configuration [optional]
	 * @return void
	 */
	public function __construct(CssParser $parser, array $configuration = null)
		{
		$this->configuration	= $configuration;
		$this->parser			= $parser;
		}
	/**
	 * Returns the array of chars triggering the parser plugin.
	 *
	 * @return array
	 */
	abstract public function getTriggerChars();
	/**
	 * Returns the array of states triggering the parser plugin or FALSE if every state will trigger the parser plugin.
	 *
	 * @return array
	 */
	abstract public function getTriggerStates();
	/**
	 * Parser routine of the plugin.
	 *
	 * @param integer $index Current index
	 * @param string $char Current char
	 * @param string $previousChar Previous char
	 * @return mixed TRUE will break the processing; FALSE continue with the next plugin; integer set a new index and break the processing
	 */
	abstract public function parse($index, $char, $previousChar, $state);
	}

/**
 * Abstract definition of a minifier plugin class.
 *
 * Minifier plugin process the parsed tokens one by one to apply changes to the token. Every minifier plugin has to
 * extend this class.
 *
 * @package		CssMin/Minifier/Plugins
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssMinifierPlugin
	{
	/**
	 * Plugin configuration.
	 *
	 * @var array
	 */
	protected $configuration = array();
	/**
	 * The CssMinifier of the plugin.
	 *
	 * @var CssMinifier
	 */
	protected $minifier = null;
	/**
	 * Constructor.
	 *
	 * @param CssMinifier $minifier The CssMinifier object of this plugin.
	 * @param array $configuration Plugin configuration [optional]
	 * @return void
	 */
	public function __construct(CssMinifier $minifier, array $configuration = array())
		{
		$this->configuration	= $configuration;
		$this->minifier			= $minifier;
		}
	/**
	 * Apply the plugin to the token.
	 *
	 * @param aCssToken $token Token to process
	 * @return boolean Return TRUE to break the processing of this token; FALSE to continue
	 */
	abstract public function apply(aCssToken &$token);
	/**
	 * --
	 *
	 * @return array
	 */
	abstract public function getTriggerTokens();
	}

/**
 * Abstract definition of a minifier filter class.
 *
 * Minifier filters allows a pre-processing of the parsed token to add, edit or delete tokens. Every minifier filter
 * has to extend this class.
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssMinifierFilter
	{
	/**
	 * Filter configuration.
	 *
	 * @var array
	 */
	protected $configuration = array();
	/**
	 * The CssMinifier of the filter.
	 *
	 * @var CssMinifier
	 */
	protected $minifier = null;
	/**
	 * Constructor.
	 *
	 * @param CssMinifier $minifier The CssMinifier object of this plugin.
	 * @param array $configuration Filter configuration [optional]
	 * @return void
	 */
	public function __construct(CssMinifier $minifier, array $configuration = array())
		{
		$this->configuration	= $configuration;
		$this->minifier			= $minifier;
		}
	/**
	 * Filter the tokens.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value large than 0 will rebuild the array
	 */
	abstract public function apply(array &$tokens);
	}

/**
 * Abstract formatter definition.
 *
 * Every formatter have to extend this class.
 *
 * @package		CssMin/Formatter
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssFormatter
	{
	/**
	 * Indent string.
	 *
	 * @var string
	 */
	protected $indent = "    ";
	/**
	 * Declaration padding.
	 *
	 * @var integer
	 */
	protected $padding = 0;
	/**
	 * Tokens.
	 *
	 * @var array
	 */
	protected $tokens = array();
	/**
	 * Constructor.
	 *
	 * @param array $tokens Array of CssToken
	 * @param string $indent Indent string [optional]
	 * @param integer $padding Declaration value padding [optional]
	 */
	public function __construct(array $tokens, $indent = null, $padding = null)
		{
		$this->tokens	= $tokens;
		$this->indent	= !is_null($indent) ? $indent : $this->indent;
		$this->padding	= !is_null($padding) ? $padding : $this->padding;
		}
	/**
	 * Returns the array of aCssToken as formatted string.
	 *
	 * @return string
	 */
	abstract public function __toString();
	}

/**
 * Abstract definition of a ruleset declaration token.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssDeclarationToken extends aCssToken
	{
	/**
	 * Is the declaration flagged as important?
	 *
	 * @var boolean
	 */
	public $IsImportant = false;
	/**
	 * Is the declaration flagged as last one of the ruleset?
	 *
	 * @var boolean
	 */
	public $IsLast = false;
	/**
	 * Property name of the declaration.
	 *
	 * @var string
	 */
	public $Property = "";
	/**
	 * Value of the declaration.
	 *
	 * @var string
	 */
	public $Value = "";
	/**
	 * Set the properties of the @font-face declaration.
	 *
	 * @param string $property Property of the declaration
	 * @param string $value Value of the declaration
	 * @param boolean $isImportant Is the !important flag is set?
	 * @param boolean $IsLast Is the declaration the last one of the block?
	 * @return void
	 */
	public function __construct($property, $value, $isImportant = false, $isLast = false)
		{
		$this->Property		= $property;
		$this->Value		= $value;
		$this->IsImportant	= $isImportant;
		$this->IsLast		= $isLast;
		}
	/**
	 * Implements {@link aCssToken::__toString()}.
	 *
	 * @return string
	 */
	public function __toString()
		{
		return $this->Property . ":" . $this->Value . ($this->IsImportant ? " !important" : "") . ($this->IsLast ? "" : ";");
		}
	}

/**
 * Abstract definition of a for at-rule block start token.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssAtBlockStartToken extends aCssToken
	{

	}

/**
 * Abstract definition of a for at-rule block end token.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
abstract class aCssAtBlockEndToken extends aCssToken
	{
	/**
	 * Implements {@link aCssToken::__toString()}.
	 *
	 * @return string
	 */
	public function __toString()
		{
		return "}";
		}
	}

/**
 * {@link aCssFromatter Formatter} returning the CSS source in {@link http://goo.gl/etzLs Whitesmiths indent style}.
 *
 * @package		CssMin/Formatter
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssWhitesmithsFormatter extends aCssFormatter
	{
	/**
	 * Implements {@link aCssFormatter::__toString()}.
	 *
	 * @return string
	 */
	public function __toString()
		{
		$r				= array();
		$level			= 0;
		for ($i = 0, $l = count($this->tokens); $i < $l; $i++)
			{
			$token		= $this->tokens[$i];
			$class		= get_class($token);
			$indent 	= str_repeat($this->indent, $level);
			if ($class === "CssCommentToken")
				{
				$lines = array_map("trim", explode("\n", $token->Comment));
				for ($ii = 0, $ll = count($lines); $ii < $ll; $ii++)
					{
					$r[] = $indent . (substr($lines[$ii], 0, 1) == "*" ? " " : "") . $lines[$ii];
					}
				}
			elseif ($class === "CssAtCharsetToken")
				{
				$r[] = $indent . "@charset " . $token->Charset . ";";
				}
			elseif ($class === "CssAtFontFaceStartToken")
				{
				$r[] = $indent . "@font-face";
				$r[] = $this->indent . $indent . "{";
				$level++;
				}
			elseif ($class === "CssAtImportToken")
				{
				$r[] = $indent . "@import " . $token->Import . " " . implode(", ", $token->MediaTypes) . ";";
				}
			elseif ($class === "CssAtKeyframesStartToken")
				{
				$r[] = $indent . "@keyframes \"" . $token->Name . "\"";
				$r[] = $this->indent . $indent . "{";
				$level++;
				}
			elseif ($class === "CssAtMediaStartToken")
				{
				$r[] = $indent . "@media " . implode(", ", $token->MediaTypes);
				$r[] = $this->indent . $indent . "{";
				$level++;
				}
			elseif ($class === "CssAtPageStartToken")
				{
				$r[] = $indent . "@page";
				$r[] = $this->indent . $indent . "{";
				$level++;
				}
			elseif ($class === "CssAtVariablesStartToken")
				{
				$r[] = $indent . "@variables " . implode(", ", $token->MediaTypes);
				$r[] = $this->indent . $indent . "{";
				$level++;
				}
			elseif ($class === "CssRulesetStartToken" || $class === "CssAtKeyframesRulesetStartToken")
				{
				$r[] = $indent . implode(", ", $token->Selectors);
				$r[] = $this->indent . $indent . "{";
				$level++;
				}
			elseif ($class == "CssAtFontFaceDeclarationToken"
				|| $class === "CssAtKeyframesRulesetDeclarationToken"
				|| $class === "CssAtPageDeclarationToken"
				|| $class == "CssAtVariablesDeclarationToken"
				|| $class === "CssRulesetDeclarationToken"
				)
				{
				$declaration = $indent . $token->Property . ": ";
				if ($this->padding)
					{
					$declaration = str_pad($declaration, $this->padding, " ", STR_PAD_RIGHT);
					}
				$r[] = $declaration . $token->Value . ($token->IsImportant ? " !important" : "") . ";";
				}
			elseif ($class === "CssAtFontFaceEndToken"
				|| $class === "CssAtMediaEndToken"
				|| $class === "CssAtKeyframesEndToken"
				|| $class === "CssAtKeyframesRulesetEndToken"
				|| $class === "CssAtPageEndToken"
				|| $class === "CssAtVariablesEndToken"
				|| $class === "CssRulesetEndToken"
				)
				{
				$r[] = $indent . "}";
				$level--;
				}
			}
		return implode("\n", $r);
		}
	}

/**
 * This {@link aCssMinifierPlugin} will process var-statement and sets the declaration value to the variable value.
 *
 * This plugin only apply the variable values. The variable values itself will get parsed by the
 * {@link CssVariablesMinifierFilter}.
 *
 * Example:
 * <code>
 * @variables
 * 		{
 * 		defaultColor: black;
 * 		}
 * color: var(defaultColor);
 * </code>
 *
 * Will get converted to:
 * <code>
 * color:black;
 * </code>
 *
 * @package		CssMin/Minifier/Plugins
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssVariablesMinifierPlugin extends aCssMinifierPlugin
	{
	/**
	 * Regular expression matching a value.
	 *
	 * @var string
	 */
	private $reMatch = "/var\((.+)\)/iSU";
	/**
	 * Parsed variables.
	 *
	 * @var array
	 */
	private $variables = null;
	/**
	 * Returns the variables.
	 *
	 * @return array
	 */
	public function getVariables()
		{
		return $this->variables;
		}
	/**
	 * Implements {@link aCssMinifierPlugin::minify()}.
	 *
	 * @param aCssToken $token Token to process
	 * @return boolean Return TRUE to break the processing of this token; FALSE to continue
	 */
	public function apply(aCssToken &$token)
		{
		if (stripos($token->Value, "var") !== false && preg_match_all($this->reMatch, $token->Value, $m))
			{
			$mediaTypes	= $token->MediaTypes;
			if (!in_array("all", $mediaTypes))
				{
				$mediaTypes[] = "all";
				}
			for ($i = 0, $l = count($m[0]); $i < $l; $i++)
				{
				$variable	= trim($m[1][$i]);
				foreach ($mediaTypes as $mediaType)
					{
					if (isset($this->variables[$mediaType], $this->variables[$mediaType][$variable]))
						{
						// Variable value found => set the declaration value to the variable value and return
						$token->Value = str_replace($m[0][$i], $this->variables[$mediaType][$variable], $token->Value);
						continue 2;
						}
					}
				// If no value was found trigger an error and replace the token with a CssNullToken
				CssMin::triggerError(new CssError(__FILE__, __LINE__, __METHOD__ . ": No value found for variable <code>" . $variable . "</code> in media types <code>" . implode(", ", $mediaTypes) . "</code>", (string) $token));
				$token = new CssNullToken();
				return true;
				}
			}
		return false;
		}
	/**
	 * Implements {@link aMinifierPlugin::getTriggerTokens()}
	 *
	 * @return array
	 */
	public function getTriggerTokens()
		{
		return array
			(
			"CssAtFontFaceDeclarationToken",
			"CssAtPageDeclarationToken",
			"CssRulesetDeclarationToken"
			);
		}
	/**
	 * Sets the variables.
	 *
	 * @param array $variables Variables to set
	 * @return void
	 */
	public function setVariables(array $variables)
		{
		$this->variables = $variables;
		}
	}

/**
 * This {@link aCssMinifierFilter minifier filter} will parse the variable declarations out of @variables at-rule
 * blocks. The variables will get store in the {@link CssVariablesMinifierPlugin} that will apply the variables to
 * declaration.
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssVariablesMinifierFilter extends aCssMinifierFilter
	{
	/**
	 * Implements {@link aCssMinifierFilter::filter()}.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value large than 0 will rebuild the array
	 */
	public function apply(array &$tokens)
		{
		$variables			= array();
		$defaultMediaTypes	= array("all");
		$mediaTypes			= array();
		$remove				= array();
		for($i = 0, $l = count($tokens); $i < $l; $i++)
			{
			// @variables at-rule block found
			if (get_class($tokens[$i]) === "CssAtVariablesStartToken")
				{
				$remove[] = $i;
				$mediaTypes = (count($tokens[$i]->MediaTypes) == 0 ? $defaultMediaTypes : $tokens[$i]->MediaTypes);
				foreach ($mediaTypes as $mediaType)
					{
					if (!isset($variables[$mediaType]))
						{
						$variables[$mediaType] = array();
						}
					}
				// Read the variable declaration tokens
				for($i = $i; $i < $l; $i++)
					{
					// Found a variable declaration => read the variable values
					if (get_class($tokens[$i]) === "CssAtVariablesDeclarationToken")
						{
						foreach ($mediaTypes as $mediaType)
							{
							$variables[$mediaType][$tokens[$i]->Property] = $tokens[$i]->Value;
							}
						$remove[] = $i;
						}
					// Found the variables end token => break;
					elseif (get_class($tokens[$i]) === "CssAtVariablesEndToken")
						{
						$remove[] = $i;
						break;
						}
					}
				}
			}
		// Variables in @variables at-rule blocks
		foreach($variables as $mediaType => $null)
			{
			foreach($variables[$mediaType] as $variable => $value)
				{
				// If a var() statement in a variable value found...
				if (stripos($value, "var") !== false && preg_match_all("/var\((.+)\)/iSU", $value, $m))
					{
					// ... then replace the var() statement with the variable values.
					for ($i = 0, $l = count($m[0]); $i < $l; $i++)
						{
						$variables[$mediaType][$variable] = str_replace($m[0][$i], (isset($variables[$mediaType][$m[1][$i]]) ? $variables[$mediaType][$m[1][$i]] : ""), $variables[$mediaType][$variable]);
						}
					}
				}
			}
		// Remove the complete @variables at-rule block
		foreach ($remove as $i)
			{
			$tokens[$i] = null;
			}
		if (!($plugin = $this->minifier->getPlugin("CssVariablesMinifierPlugin")))
			{
			CssMin::triggerError(new CssError(__FILE__, __LINE__, __METHOD__ . ": The plugin <code>CssVariablesMinifierPlugin</code> was not found but is required for <code>" . __CLASS__ . "</code>"));
			}
		else
			{
			$plugin->setVariables($variables);
			}
		return count($remove);
		}
	}

/**
 * {@link aCssParserPlugin Parser plugin} for preserve parsing url() values.
 *
 * This plugin return no {@link aCssToken CssToken} but ensures that url() values will get parsed properly.
 *
 * @package		CssMin/Parser/Plugins
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssUrlParserPlugin extends aCssParserPlugin
	{
	/**
	 * Implements {@link aCssParserPlugin::getTriggerChars()}.
	 *
	 * @return array
	 */
	public function getTriggerChars()
		{
		return array("(", ")");
		}
	/**
	 * Implements {@link aCssParserPlugin::getTriggerStates()}.
	 *
	 * @return array
	 */
	public function getTriggerStates()
		{
		return false;
		}
	/**
	 * Implements {@link aCssParserPlugin::parse()}.
	 *
	 * @param integer $index Current index
	 * @param string $char Current char
	 * @param string $previousChar Previous char
	 * @return mixed TRUE will break the processing; FALSE continue with the next plugin; integer set a new index and break the processing
	 */
	public function parse($index, $char, $previousChar, $state)
		{
		// Start of string
		if ($char === "(" && strtolower(substr($this->parser->getSource(), $index - 3, 4)) === "url(" && $state !== "T_URL")
			{
			$this->parser->pushState("T_URL");
			$this->parser->setExclusive(__CLASS__);
			}
		// Escaped LF in url => remove escape backslash and LF
		elseif ($char === "\n" && $previousChar === "\\" && $state === "T_URL")
			{
			$this->parser->setBuffer(substr($this->parser->getBuffer(), 0, -2));
			}
		// Parse error: Unescaped LF in string literal
		elseif ($char === "\n" && $previousChar !== "\\" && $state === "T_URL")
			{
			$line = $this->parser->getBuffer();
			$this->parser->setBuffer(substr($this->parser->getBuffer(), 0, -1) . ")"); // Replace the LF with the url string delimiter
			$this->parser->popState();
			$this->parser->unsetExclusive();
			CssMin::triggerError(new CssError(__FILE__, __LINE__, __METHOD__ . ": Unterminated string literal", $line . "_"));
			}
		// End of string
		elseif ($char === ")" && $state === "T_URL")
			{
			$this->parser->popState();
			$this->parser->unsetExclusive();
			}
		else
			{
			return false;
			}
		return true;
		}
	}

/**
 * {@link aCssParserPlugin Parser plugin} for preserve parsing string values.
 *
 * This plugin return no {@link aCssToken CssToken} but ensures that string values will get parsed properly.
 *
 * @package		CssMin/Parser/Plugins
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssStringParserPlugin extends aCssParserPlugin
	{
	/**
	 * Current string delimiter char.
	 *
	 * @var string
	 */
	private $delimiterChar = null;
	/**
	 * Implements {@link aCssParserPlugin::getTriggerChars()}.
	 *
	 * @return array
	 */
	public function getTriggerChars()
		{
		return array("\"", "'", "\n");
		}
	/**
	 * Implements {@link aCssParserPlugin::getTriggerStates()}.
	 *
	 * @return array
	 */
	public function getTriggerStates()
		{
		return false;
		}
	/**
	 * Implements {@link aCssParserPlugin::parse()}.
	 *
	 * @param integer $index Current index
	 * @param string $char Current char
	 * @param string $previousChar Previous char
	 * @return mixed TRUE will break the processing; FALSE continue with the next plugin; integer set a new index and break the processing
	 */
	public function parse($index, $char, $previousChar, $state)
		{
		// Start of string
		if (($char === "\"" || $char === "'") && $state !== "T_STRING")
			{
			$this->delimiterChar = $char;
			$this->parser->pushState("T_STRING");
			$this->parser->setExclusive(__CLASS__);
			}
		// Escaped LF in string => remove escape backslash and LF
		elseif ($char === "\n" && $previousChar === "\\" && $state === "T_STRING")
			{
			$this->parser->setBuffer(substr($this->parser->getBuffer(), 0, -2));
			}
		// Parse error: Unescaped LF in string literal
		elseif ($char === "\n" && $previousChar !== "\\" && $state === "T_STRING")
			{
			$line = $this->parser->getBuffer();
			$this->parser->popState();
			$this->parser->unsetExclusive();
			$this->parser->setBuffer(substr($this->parser->getBuffer(), 0, -1) . $this->delimiterChar); // Replace the LF with the current string char
			CssMin::triggerError(new CssError(__FILE__, __LINE__, __METHOD__ . ": Unterminated string literal", $line . "_"));
			$this->delimiterChar = null;
			}
		// End of string
		elseif ($char === $this->delimiterChar && $state === "T_STRING")
			{
			// If the Previous char is a escape char count the amount of the previous escape chars. If the amount of
			// escape chars is uneven do not end the string
			if ($previousChar == "\\")
				{
				$source	= $this->parser->getSource();
				$c		= 1;
				$i		= $index - 2;
				while (substr($source, $i, 1) === "\\")
					{
					$c++; $i--;
					}
				if ($c % 2)
					{
					return false;
					}
				}
			$this->parser->popState();
			$this->parser->unsetExclusive();
			$this->delimiterChar = null;
			}
		else
			{
			return false;
			}
		return true;
		}
	}

/**
 * This {@link aCssMinifierFilter minifier filter} sorts the ruleset declarations of a ruleset by name.
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Rowan Beentje <http://assanka.net>
 * @copyright	Rowan Beentje <http://assanka.net>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssSortRulesetPropertiesMinifierFilter extends aCssMinifierFilter
	{
	/**
	 * Implements {@link aCssMinifierFilter::filter()}.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value larger than 0 will rebuild the array
	 */
	public function apply(array &$tokens)
		{
		$r = 0;
		for ($i = 0, $l = count($tokens); $i < $l; $i++)
			{
			// Only look for ruleset start rules
			if (get_class($tokens[$i]) !== "CssRulesetStartToken") { continue; }
			// Look for the corresponding ruleset end
			$endIndex = false;
			for ($ii = $i + 1; $ii < $l; $ii++)
				{
				if (get_class($tokens[$ii]) !== "CssRulesetEndToken") { continue; }
				$endIndex = $ii;
				break;
				}
			if (!$endIndex) { break; }
			$startIndex = $i;
			$i = $endIndex;
			// Skip if there's only one token in this ruleset
			if ($endIndex - $startIndex <= 2) { continue; }
			// Ensure that everything between the start and end is a declaration token, for safety
			for ($ii = $startIndex + 1; $ii < $endIndex; $ii++)
				{
				if (get_class($tokens[$ii]) !== "CssRulesetDeclarationToken") { continue(2); }
				}
			$declarations = array_slice($tokens, $startIndex + 1, $endIndex - $startIndex - 1);
			// Check whether a sort is required
			$sortRequired = $lastPropertyName = false;
			foreach ($declarations as $declaration)
				{
				if ($lastPropertyName)
					{
					if (strcmp($lastPropertyName, $declaration->Property) > 0)
						{
						$sortRequired = true;
						break;
						}
					}
				$lastPropertyName = $declaration->Property;
				}
			if (!$sortRequired) { continue; }
			// Arrange the declarations alphabetically by name
			usort($declarations, array(__CLASS__, "userDefinedSort1"));
			// Update "IsLast" property
			for ($ii = 0, $ll = count($declarations) - 1; $ii <= $ll; $ii++)
				{
				if ($ii == $ll)
					{
					$declarations[$ii]->IsLast = true;
					}
				else
					{
					$declarations[$ii]->IsLast = false;
					}
				}
			// Splice back into the array.
			array_splice($tokens, $startIndex + 1, $endIndex - $startIndex - 1, $declarations);
			$r += $endIndex - $startIndex - 1;
			}
		return $r;
		}
	/**
	 * User defined sort function.
	 *
	 * @return integer
	 */
	public static function userDefinedSort1($a, $b)
		{
		return strcmp($a->Property, $b->Property);
		}
	}

/**
 * This {@link aCssToken CSS token} represents the start of a ruleset.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRulesetStartToken extends aCssRulesetStartToken
	{
	/**
	 * Array of selectors.
	 *
	 * @var array
	 */
	public $Selectors = array();
	/**
	 * Set the properties of a ruleset token.
	 *
	 * @param array $selectors Selectors of the ruleset
	 * @return void
	 */
	public function __construct(array $selectors = array())
		{
		$this->Selectors = $selectors;
		}
	/**
	 * Implements {@link aCssToken::__toString()}.
	 *
	 * @return string
	 */
	public function __toString()
		{
		return implode(",", $this->Selectors) . "{";
		}
	}

/**
 * {@link aCssParserPlugin Parser plugin} for parsing ruleset block with including declarations.
 *
 * Found rulesets will add a {@link CssRulesetStartToken} and {@link CssRulesetEndToken} to the
 * parser; including declarations as {@link CssRulesetDeclarationToken}.
 *
 * @package		CssMin/Parser/Plugins
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRulesetParserPlugin extends aCssParserPlugin
	{
	/**
	 * Implements {@link aCssParserPlugin::getTriggerChars()}.
	 *
	 * @return array
	 */
	public function getTriggerChars()
		{
		return array(",", "{", "}", ":", ";");
		}
	/**
	 * Implements {@link aCssParserPlugin::getTriggerStates()}.
	 *
	 * @return array
	 */
	public function getTriggerStates()
		{
		return array("T_DOCUMENT", "T_AT_MEDIA", "T_RULESET::SELECTORS", "T_RULESET", "T_RULESET_DECLARATION");
		}
	/**
	 * Selectors.
	 *
	 * @var array
	 */
	private $selectors = array();
	/**
	 * Implements {@link aCssParserPlugin::parse()}.
	 *
	 * @param integer $index Current index
	 * @param string $char Current char
	 * @param string $previousChar Previous char
	 * @return mixed TRUE will break the processing; FALSE continue with the next plugin; integer set a new index and break the processing
	 */
	public function parse($index, $char, $previousChar, $state)
		{
		// Start of Ruleset and selectors
		if ($char === "," && ($state === "T_DOCUMENT" || $state === "T_AT_MEDIA" || $state === "T_RULESET::SELECTORS"))
			{
			if ($state !== "T_RULESET::SELECTORS")
				{
				$this->parser->pushState("T_RULESET::SELECTORS");
				}
			$this->selectors[] = $this->parser->getAndClearBuffer(",{");
			}
		// End of selectors and start of declarations
		elseif ($char === "{" && ($state === "T_DOCUMENT" || $state === "T_AT_MEDIA" || $state === "T_RULESET::SELECTORS"))
			{
			if ($this->parser->getBuffer() !== "")
				{
				$this->selectors[] = $this->parser->getAndClearBuffer(",{");
				if ($state == "T_RULESET::SELECTORS")
					{
					$this->parser->popState();
					}
				$this->parser->pushState("T_RULESET");
				$this->parser->appendToken(new CssRulesetStartToken($this->selectors));
				$this->selectors = array();
				}
			}
		// Start of declaration
		elseif ($char === ":" && $state === "T_RULESET")
			{
			$this->parser->pushState("T_RULESET_DECLARATION");
			$this->buffer = $this->parser->getAndClearBuffer(":;", true);
			}
		// Unterminated ruleset declaration
		elseif ($char === ":" && $state === "T_RULESET_DECLARATION")
			{
			// Ignore Internet Explorer filter declarations
			if ($this->buffer === "filter")
				{
				return false;
				}
			CssMin::triggerError(new CssError(__FILE__, __LINE__, __METHOD__ . ": Unterminated declaration", $this->buffer . ":" . $this->parser->getBuffer() . "_"));
			}
		// End of declaration
		elseif (($char === ";" || $char === "}") && $state === "T_RULESET_DECLARATION")
			{
			$value = $this->parser->getAndClearBuffer(";}");
			if (strtolower(substr($value, -10, 10)) === "!important")
				{
				$value = trim(substr($value, 0, -10));
				$isImportant = true;
				}
			else
				{
				$isImportant = false;
				}
			$this->parser->popState();
			$this->parser->appendToken(new CssRulesetDeclarationToken($this->buffer, $value, $this->parser->getMediaTypes(), $isImportant));
			// Declaration ends with a right curly brace; so we have to end the ruleset
			if ($char === "}")
				{
				$this->parser->appendToken(new CssRulesetEndToken());
				$this->parser->popState();
				}
			$this->buffer = "";
			}
		// End of ruleset
		elseif ($char === "}" && $state === "T_RULESET")
			{
			$this->parser->popState();
			$this->parser->clearBuffer();
			$this->parser->appendToken(new CssRulesetEndToken());
			$this->buffer = "";
			$this->selectors = array();
			}
		else
			{
			return false;
			}
		return true;
		}
	}

/**
 *  This {@link aCssToken CSS token} represents the end of a ruleset.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRulesetEndToken extends aCssRulesetEndToken
	{

	}

/**
 * This {@link aCssToken CSS token} represents a ruleset declaration.
 *
 * @package		CssMin/Tokens
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRulesetDeclarationToken extends aCssDeclarationToken
	{
	/**
	 * Media types of the declaration.
	 *
	 * @var array
	 */
	public $MediaTypes = array("all");
	/**
	 * Set the properties of a ddocument- or at-rule @media level declaration.
	 *
	 * @param string $property Property of the declaration
	 * @param string $value Value of the declaration
	 * @param mixed $mediaTypes Media types of the declaration
	 * @param boolean $isImportant Is the !important flag is set
	 * @param boolean $isLast Is the declaration the last one of the ruleset
	 * @return void
	 */
	public function __construct($property, $value, $mediaTypes = null, $isImportant = false, $isLast = false)
		{
		parent::__construct($property, $value, $isImportant, $isLast);
		$this->MediaTypes	= $mediaTypes ? $mediaTypes : array("all");
		}
	}

/**
 * This {@link aCssMinifierFilter minifier filter} sets the IsLast property of any last declaration in a ruleset,
 * @font-face at-rule or @page at-rule block. If the property IsLast is TRUE the decrations will get stringified
 * without tailing semicolon.
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRemoveLastDelarationSemiColonMinifierFilter extends aCssMinifierFilter
	{
	/**
	 * Implements {@link aCssMinifierFilter::filter()}.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value large than 0 will rebuild the array
	 */
	public function apply(array &$tokens)
		{
		for ($i = 0, $l = count($tokens); $i < $l; $i++)
			{
			$current	= get_class($tokens[$i]);
			$next		= isset($tokens[$i+1]) ? get_class($tokens[$i+1]) : false;
			if (($current === "CssRulesetDeclarationToken" && $next === "CssRulesetEndToken") ||
				($current === "CssAtFontFaceDeclarationToken" && $next === "CssAtFontFaceEndToken") ||
				($current === "CssAtPageDeclarationToken" && $next === "CssAtPageEndToken"))
				{
				$tokens[$i]->IsLast = true;
				}
			}
		return 0;
		}
	}

/**
 * This {@link aCssMinifierFilter minifier filter} will remove any empty rulesets (including @keyframes at-rule block
 * rulesets).
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRemoveEmptyRulesetsMinifierFilter extends aCssMinifierFilter
	{
	/**
	 * Implements {@link aCssMinifierFilter::filter()}.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value large than 0 will rebuild the array
	 */
	public function apply(array &$tokens)
		{
		$r = 0;
		for ($i = 0, $l = count($tokens); $i < $l; $i++)
			{
			$current	= get_class($tokens[$i]);
			$next		= isset($tokens[$i + 1]) ? get_class($tokens[$i + 1]) : false;
			if (($current === "CssRulesetStartToken" && $next === "CssRulesetEndToken") ||
				($current === "CssAtKeyframesRulesetStartToken" && $next === "CssAtKeyframesRulesetEndToken" && !array_intersect(array("from", "0%", "to", "100%"), array_map("strtolower", $tokens[$i]->Selectors)))
				)
				{
				$tokens[$i]		= null;
				$tokens[$i + 1]	= null;
				$i++;
				$r = $r + 2;
				}
			}
		return $r;
		}
	}

/**
 * This {@link aCssMinifierFilter minifier filter} will remove any empty @font-face, @keyframes, @media and @page
 * at-rule blocks.
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRemoveEmptyAtBlocksMinifierFilter extends aCssMinifierFilter
	{
	/**
	 * Implements {@link aCssMinifierFilter::filter()}.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value large than 0 will rebuild the array
	 */
	public function apply(array &$tokens)
		{
		$r = 0;
		for ($i = 0, $l = count($tokens); $i < $l; $i++)
			{
			$current	= get_class($tokens[$i]);
			$next		= isset($tokens[$i + 1]) ? get_class($tokens[$i + 1]) : false;
			if (($current === "CssAtFontFaceStartToken" && $next === "CssAtFontFaceEndToken") ||
				($current === "CssAtKeyframesStartToken" && $next === "CssAtKeyframesEndToken") ||
				($current === "CssAtPageStartToken" && $next === "CssAtPageEndToken") ||
				($current === "CssAtMediaStartToken" && $next === "CssAtMediaEndToken"))
				{
				$tokens[$i]		= null;
				$tokens[$i + 1]	= null;
				$i++;
				$r = $r + 2;
				}
			}
		return $r;
		}
	}

/**
 * This {@link aCssMinifierFilter minifier filter} will remove any comments from the array of parsed tokens.
 *
 * @package		CssMin/Minifier/Filters
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssRemoveCommentsMinifierFilter extends aCssMinifierFilter
	{
	/**
	 * Implements {@link aCssMinifierFilter::filter()}.
	 *
	 * @param array $tokens Array of objects of type aCssToken
	 * @return integer Count of added, changed or removed tokens; a return value large than 0 will rebuild the array
	 */
	public function apply(array &$tokens)
		{
		$r = 0;
		for ($i = 0, $l = count($tokens); $i < $l; $i++)
			{
			if (get_class($tokens[$i]) === "CssCommentToken")
				{
				$tokens[$i] = null;
				$r++;
				}
			}
		return $r;
		}
	}

/**
 * CSS Parser.
 *
 * @package		CssMin/Parser
 * @link		http://code.google.com/p/cssmin/
 * @author		Joe Scylla <joe.scylla@gmail.com>
 * @copyright	2008 - 2011 Joe Scylla <joe.scylla@gmail.com>
 * @license		http://opensource.org/licenses/mit-license.php MIT License
 * @version		3.0.1
 */
class CssParser
	{
	/**
	 * Parse buffer.
	 *
	 * @var string
	 */
	private $buffer = "";
	/**
	 * {@link aCssParserPlugin Plugins}.
	 *
	 * @var array
	 */
	private $plugins = array();
	/**
	 * Source to parse.
	 *
	 * @var string
	 */
	private $source = "";
	/**
	 * Current state.
	 *
	 * @var integer
	 */
	private $state = "T_DOCUMENT";
	/**
	 * Exclusive state.
	 *
	 * @var string
	 */
	private $stateExclusive = false;
	/**
	 * Media types state.
	 *
	 * @var mixed
	 */
	private $stateMediaTypes = false;
	/**
	 * State stack.
	 *
	 * @var array
	 */
	private $states = array("T_DOCUMENT");
	/**
	 * Parsed tokens.
	 *
	 * @var array
	 */
	private $tokens = array();
	/**
	 * Constructer.
	 *
	 *  Create instances of the used {@link aCssParserPlugin plugins}.
	 *
	 * @param string $source CSS source [optional]
	 * @param array $plugins Plugin configuration [optional]
	 * @return void
	 */
	public function __construct($source = null, array $plugins = null)
		{
		$plugins = array_merge(array
			(
			"Comment"		=> true,
			"String"		=> true,
			"Url"			=> true,
			"Expression"	=> true,
			"Ruleset"		=> true,
			"AtCharset"		=> true,
			"AtFontFace"	=> true,
			"AtImport"		=> true,
			"AtKeyframes"	=> true,
			"AtMedia"		=> true,
			"AtPage"		=> true,
			"AtVariables"	=> true
			), is_array($plugins) ? $plugins : array());
		// Create plugin instances
		foreach ($plugins as $name => $config)
			{
			if ($config !== false)
				{
				$class	= "Css" . $name . "ParserPlugin";
				$config = is_array($config) ? $config : array();
				if (class_exists($class))
					{
					$this->plugins[] = new $class($this, $config);
					}
				else
					{
					CssMin::triggerError(new CssError(__FILE__, __LINE__, __METHOD__ . ": The plugin <code>" . $name . "</code> with the class name <code>" . $class . "</code> was not found"));
					}
				}
			}
		if (!is_null($source))
			{
			$this->parse($source);
			}
		}
	/**
	 * Append a token to the array of tokens.
	 *
	 * @param aCssToken $token Token to append
	 * @return void
	 */
	public function appendToken(aCssToken $token)
		{
		$this->tokens[] = $token;
		}
	/**
	 * Clears the current buffer.
	 *
	 * @return void
	 */
	public function clearBuffer()
		{
		$this->buffer = "";
		}
	/**
	 * Returns and clear the current buffer.
	 *
	 * @param string $trim Chars to use to trim the returned buffer
	 * @param boolean $tolower if TRUE the returned buffer will get converted to lower case
	 * @return string
	 */
	public function getAndClearBuffer($trim = "", $tolower = false)
		{
		$r = $this->getBuffer($trim, $tolower);
		$this->buffer = "";
		return $r;
		}
	/**
	 * Returns the current buffer.
	 *
	 * @param string $trim Chars to use to trim the returned buffer
	 * @param boolean $tolower if TRUE the returned buffer will get converted to lower case
	 * @return string
	 */
	public function getBuffer($trim = "", $tolower = false)
		{
		$r = $this->buffer;
		if ($trim)
			{
			$r = trim($r, " \t\n\r\0\x0B" . $trim);
			}
		if ($tolower)
			{
			$r = strtolower($r);
			}
		return $r;
		}
	/**
	 * Returns the current media types state.
	 *
	 * @return array
	 */
	public function getMediaTypes()
		{
		return $this->stateMediaTypes;
		}
	/**
	 * Returns the CSS source.
	 *
	 * @return string
	 */
	public function getSource()
		{
		return $this->source;
		}
	/**
	 * Returns the current state.
	 *
	 * @return integer The current state
	 */
	public function getState()
		{
		return $this->state;
		}
	/**
	 * Returns a plugin by class name.
	 *
	 * @param string $name Class name of the plugin
	 * @return aCssParserPlugin
	 */
	public function getPlugin($class)
		{
		static $index = null;
		if (is_null($index))
			{
			$index = array();
			for ($i = 0, $l = count($this->plugins); $i < $l; $i++)
				{
				$index[get_class($this->plugins[$i])] = $i;
				}
			}
		return isset($index[$class]) ? $this->plugins[$index[$class]] : false;
		}
	/**
	 * Returns the parsed tokens.
	 *
	 * @return array
	 */
	public function getTokens()
		{
		return $this->tokens;
		}
	/**
	 * Returns if the current state equals the passed state.
	 *
	 * @param integer $state State to compare with the current state
	 * @return boolean TRUE is the state equals to the passed state; FALSE if not
	 */
	public function isState($state)
		{
		return ($this->state == $state);
		}
	/**
	 * Parse the CSS source and return a array with parsed tokens.
	 *
	 * @param string $source CSS source
	 * @return array Array with tokens
	 */
	public function parse($source)
		{
		// Reset
		$this->source = "";
		$this->tokens = array();
		// Create a global and plugin lookup table for trigger chars; set array of plugins as local variable and create
		// several helper variables for plugin handling
		$globalTriggerChars		= "";
		$plugins				= $this->plugins;
		$pluginCount			= count($plugins);
		$pluginIndex			= array();
		$pluginTriggerStates	= array();
		$pluginTriggerChars		= array();
		for ($i = 0, $l = count($plugins); $i < $l; $i++)
			{
			$tPluginClassName				= get_class($plugins[$i]);
			$pluginTriggerChars[$i]			= implode("", $plugins[$i]->getTriggerChars());
			$tPluginTriggerStates			= $plugins[$i]->getTriggerStates();
			$pluginTriggerStates[$i]		= $tPluginTriggerStates === false ? false : "|" . implode("|", $tPluginTriggerStates) . "|";
			$pluginIndex[$tPluginClassName]	= $i;
			for ($ii = 0, $ll = strlen($pluginTriggerChars[$i]); $ii < $ll; $ii++)
				{
				$c = substr($pluginTriggerChars[$i], $ii, 1);
				if (strpos($globalTriggerChars, $c) === false)
					{
					$globalTriggerChars .= $c;
					}
				}
			}
		// Normalise line endings
		$source			= str_replace("\r\n", "\n", $source);	// Windows to Unix line endings
		$source			= str_replace("\r", "\n", $source);		// Mac to Unix line endings
		$this->source	= $source;
		// Variables
		$buffer			= &$this->buffer;
		$exclusive		= &$this->stateExclusive;
		$state			= &$this->state;
		$c = $p 		= null;
		// --
		for ($i = 0, $l = strlen($source); $i < $l; $i++)
			{
			// Set the current Char
			$c = $source[$i]; // Is faster than: $c = substr($source, $i, 1);
			// Normalize and filter double whitespace characters
			if ($exclusive === false)
				{
				if ($c === "\n" || $c === "\t")
					{
					$c = " ";
					}
				if ($c === " " && $p === " ")
					{
					continue;
					}
				}
			$buffer .= $c;
			// Extended processing only if the current char is a global trigger char
			if (strpos($globalTriggerChars, $c) !== false)
				{
				// Exclusive state is set; process with the exclusive plugin
				if ($exclusive)
					{
					$tPluginIndex = $pluginIndex[$exclusive];
					if (strpos($pluginTriggerChars[$tPluginIndex], $c) !== false && ($pluginTriggerStates[$tPluginIndex] === false || strpos($pluginTriggerStates[$tPluginIndex], $state) !== false))
						{
						$r = $plugins[$tPluginIndex]->parse($i, $c, $p, $state);
						// Return value is TRUE => continue with next char
						if ($r === true)
							{
							continue;
							}
						// Return value is numeric => set new index and continue with next char
						elseif ($r !== false && $r != $i)
							{
							$i = $r;
							continue;
							}
						}
					}
				// Else iterate through the plugins
				else
					{
					$triggerState = "|" . $state . "|";
					for ($ii = 0, $ll = $pluginCount; $ii < $ll; $ii++)
						{
						// Only process if the current char is one of the plugin trigger chars
						if (strpos($pluginTriggerChars[$ii], $c) !== false && ($pluginTriggerStates[$ii] === false || strpos($pluginTriggerStates[$ii], $triggerState) !== false))
							{
							// Process with the plugin
							$r = $plugins[$ii]->parse($i, $c, $p, $state);
							// Return value is TRUE => break the plugin loop and and continue with next char
							if ($r === true)
								{
								break;
								}
							// Return value is numeric => set new index, break the plugin loop and and continue with next char
							elseif ($r !== false && $r != $i)
								{
								$i = $r;
								break;
								}
							}
						}
					}
				}
			$p = $c; // Set the parent char
			}
		return $this->tokens;
		}
	/**
	 * Remove the last state of the state stack and return the removed stack value.
	 *
	 * @return integer Removed state value
	 */
	public function popState()
		{
		$r = array_pop($this->states);
		$this->state = $this->states[count($this->states) - 1];
		return $r;
		}
	/**
	 * Adds a new state onto the state stack.
	 *
	 * @param integer $state State to add onto the state stack.
	 * @return integer The index of the added state in the state stacks
	 */
	public function pushState($state)
		{
		$r = array_push($this->states, $state);
		$this->state = $this->states[count($this->states) - 1];
		return $r;
		}
	/**
	 * Sets/restores the buffer.
	 *
	 * @param string $buffer Buffer to set
	 * @return void
	 */
	public function setBuffer($buffer)
		{
		$this->buffer = $buffer;
		}
	/**
	 * Set the exclusive state.
	 *
	 * @param string $exclusive Exclusive state
	 * @return void
	 */
	public function setExclusive($exclusive)
		{
		$this->stateExclusive = $exclusive;
		}
	/**
	 * Set the media types state.
	 *
	 * @param array $mediaTypes Media types state
	 * @return void
	 */
	public function setMediaTypes(array $mediaTypes)
		{
		$this->stateMediaTypes = $mediaTypes;
		}
	/**
	 * Sets the current state in the state stack; equals to {@link CssParser::popState()} + {@link CssParser::pushState()}.
	 *
	 * @param integer $state State to set
	 * @return integer
	 */
	public function setState($state)
		{
		$r = array_pop($this->states);
		array_push($this->stat…