. This means more source code but * more control over tab width and line-wrapping. GESHI_HEADER_PRE * means that a

 is used - less source, but less control. Default
	 * is GESHI_HEADER_PRE
	 */
	function set_header_type ( $type )
	{
		$this->header_type = $type;
	}
	
	/**
	 * method: set_overall_style
	 * -------------------------
	 * Sets the styles for the code that will be outputted
	 * when this object is parsed. The style should be a
	 * string of valid stylesheet declarations
	 */
	function set_overall_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->overall_style .= $style;
		}
		else
		{
			$this->overall_style = $style;
		}
	}
	
	/**
	 * method: set_overall_class
	 * -------------------------
	 * Sets the overall classname for this block of code. This
	 * class can then be used in a stylesheet to style this object's
	 * output
	 */
	function set_overall_class ( $class )
	{
		$this->overall_class = $class;
	}
	
	/**
	 * method: set_overall_id
	 * ----------------------
	 * Sets the overall id for this block of code. This id can then
	 * be used in a stylesheet to style this object's output
	 */
	function set_overall_id ( $id )
	{
		$this->overall_id = $id;
	}
	
	/**
	 * method: enable_classes
	 * ----------------------
	 * Sets whether CSS classes should be used to highlight the source. Default
	 * is off, calling this method with no arguments will turn it on
	 */
	function enable_classes ( $flag = true )
	{
		$this->use_classes = ( $flag ) ? true : false;
	}

	
	/**
	 * method: set_line_style
	 * ----------------------
	 * Sets the styles for the line numbers. This should be a string
	 * containing valid stylesheet declarations. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_line_style ( $style1, $style2 = '', $preserve_defaults = false )
	{
		if ( is_bool($style2) )
		{
			$preserve_defaults = $style2;
			$style2 = '';
		}
		if ( $preserve_defaults )
		{
			$this->line_style1 .= $style1;
			$this->line_style2 .= $style2;
		}
		else
		{
			$this->line_style1 = $style1;
			$this->line_style2 = $style2;
		}
	}
	
	/**
	 * method: enable_line_numbers
	 * ---------------------------
	 * Sets whether line numbers should be displayed. False = not displayed,
	 * 1 = displayed, 2 = every nth line a different class. Default is for
	 * no line numbers to be used
	 */
	function enable_line_numbers ( $flag, $nth_row = 5 )
	{
		$this->line_numbers = $flag;
		$this->line_nth_row = $nth_row;
	}
	
	/**
	 * method: set_keyword_group_style
	 * -------------------------------
	 * Sets the style for a keyword group. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_keyword_group_style ( $key, $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['KEYWORDS'][$key] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['KEYWORDS'][$key] = $style;
		}
	}
	
	/**
	 * method: set_keyword_group_highlighting
	 * --------------------------------------
	 * Turns highlighting on/off for a keyword group
	 */
	function set_keyword_group_highlighting ( $key, $flag = true )
	{
		$this->lexic_permissions['KEYWORDS'][$key] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_comments_style
	 * --------------------------
	 * Sets the styles for comment groups.  If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_comments_style ( $key, $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['COMMENTS'][$key] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['COMMENTS'][$key] = $style;
		}
	}
	
	/**
	 * method: set_comments_highlighting
	 * ---------------------------------
	 * Turns highlighting on/off for comment groups
	 */
	function set_comments_highlighting ( $key, $flag = true )
	{
		$this->lexic_permissions['COMMENTS'][$key] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_escape_characters_style
	 * -----------------------------------
	 * Sets the styles for escaped characters. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_escape_characters_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['ESCAPE_CHAR'][0] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['ESCAPE_CHAR'][0] = $style;
		}
	}
	
	
	/**
	 * method: set_escape_characters_highlighting
	 * ------------------------------------------
	 * Turns highlighting on/off for escaped characters
	 */
	function set_escape_characters_highlighting ( $flag = true )
	{
		$this->lexic_permissions['ESCAPE_CHAR'] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_brackets_style
	 * --------------------------
	 * Sets the styles for brackets. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 *
	 * This method is DEPRECATED: use set_symbols_style instead
	 */
	function set_brackets_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['BRACKETS'][0] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['BRACKETS'][0] = $style;
		}
	}
	
	/**
	 * method: set_brackets_highlighting
	 * ---------------------------------
	 * Turns highlighting on/off for brackets
	 *
	 * This method is DEPRECATED: use set_symbols_highlighting instead
	 */
	function set_brackets_highlighting ( $flag )
	{
		$this->lexic_permissions['BRACKETS'] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_symbols_style
	 * --------------------------
	 * Sets the styles for symbols. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_symbols_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['SYMBOLS'][0] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['SYMBOLS'][0] = $style;
		}
		// For backward compatibility
		$this->set_brackets_style ( $style, $preserve_defaults );
	}
	
	/**
	 * method: set_symbols_highlighting
	 * ---------------------------------
	 * Turns highlighting on/off for symbols
	 */
	function set_symbols_highlighting ( $flag )
	{
		$this->lexic_permissions['SYMBOLS'] = ( $flag ) ? true : false;
		// For backward compatibility
		$this->set_brackets_highlighting ( $flag );
	}
	
	/**
	 * method: set_strings_style
	 * -------------------------
	 * Sets the styles for strings. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_strings_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['STRINGS'][0] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['STRINGS'][0] = $style;
		}
	}
	
	/**
	 * method: set_strings_highlighting
	 * --------------------------------
	 * Turns highlighting on/off for strings
	 */
	function set_strings_highlighting ( $flag )
	{
		$this->lexic_permissions['STRINGS'] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_numbers_style
	 * -------------------------
	 * Sets the styles for numbers. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_numbers_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['NUMBERS'][0] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['NUMBERS'][0] = $style;
		}
	}
	
	/**
	 * method: set_numbers_highlighting
	 * --------------------------------
	 * Turns highlighting on/off for numbers
	 */
	function set_numbers_highlighting ( $flag )
	{
		$this->lexic_permissions['NUMBERS'] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_methods_style
	 * -------------------------
	 * Sets the styles for methods. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_methods_style ( $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['METHODS'][0] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['METHODS'][0] = $style;
		}
	}
	
	/**
	 * method: set_methods_highlighting
	 * --------------------------------
	 * Turns highlighting on/off for methods
	 */
	function set_methods_highlighting ( $flag )
	{
		$this->lexic_permissions['METHODS'] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_regexps_style
	 * -------------------------
	 * Sets the styles for regexps. If $preserve_defaults is
	 * true, then styles are merged with the default styles, with the
	 * user defined styles having priority
	 */
	function set_regexps_style ( $key, $style, $preserve_defaults = false )
	{
		if ( $preserve_defaults )
		{
			$this->language_data['STYLES']['REGEXPS'][$key] .= $style;
		}
		else
		{
			$this->language_data['STYLES']['REGEXPS'][$key] = $style;
		}
	}
	
	/**
	 * method: set_regexps_highlighting
	 * --------------------------------
	 * Turns highlighting on/off for regexps
	 */
	function set_regexps_highlighting ( $key, $flag )
	{
		$this->lexic_permissions['REGEXPS'][$key] = ( $flag ) ? true : false;
	}
	
	/**
	 * method: set_case_sensitivity
	 * ----------------------------
	 * Sets whether a set of keywords are checked for in a case sensitive manner
	 */
	function set_case_sensitivity ( $key, $case )
	{
		$this->language_data['CASE_SENSITIVE'][$key] = ( $case ) ? true : false;
	}
	
	/**
	 * method: set_case_keywords
	 * -------------------------
	 * Sets the case that keywords should use when found. Use the constants:
	 *   GESHI_CAPS_NO_CHANGE: leave keywords as-is
	 *   GESHI_CAPS_UPPER: convert all keywords to uppercase where found
	 *   GESHI_CAPS_LOWER: convert all keywords to lowercase where found
	 * Method added in 1.0.1
	 */
	function set_case_keywords ( $case )
	{
		$this->language_data['CASE_KEYWORDS'] = $case;
	}
	
	/**
	 * method: set_tab_width
	 * ---------------------
	 * Sets how many spaces a tab is substituted for
	 * This method will probably be re-engineered later to allow customisability
	 * in the maximum and minimum number of tabs without mutulating data fields.
	 */
	function set_tab_width ( $width )
	{
		if ( $width > $this->max_tabs ) $width = $this->max_tabs;
		if ( $width < $this->min_tabs ) $width = $this->min_tabs;
		$this->tab_width = $width;
	}
	
	/**
	 * method: enable_strict_mode
	 * --------------------------
	 * Enables/disables strict highlighting. Default is off, calling this
	 * method without parameters will turn it on. See documentation
	 * for more details on strict mode and where to use it
	 */
	function enable_strict_mode ( $mode = true )
	{
		$this->strict_mode = ( $mode ) ? true : false;
		// Turn on strict mode no matter what if language should always
		// be in strict mode
		if ( $this->language_data['STRICT_MODE_APPLIES'] == GESHI_ALWAYS )
		{
			$this->strict_mode = true;
		}
		// Turn off strict mode no matter what if language should never
		// be in strict mode
		elseif ( $this->language_data['STRICT_MODE_APPLIES'] == GESHI_NEVER )
		{
			$this->strict_mode = false;
		}
	}
	
	/**
	 * method: disable_highlighting
	 * ----------------------------
	 * Disables all highlighting
	 */
	function disable_highlighting ()
	{
		foreach ( $this->language_data['KEYWORDS'] as $key => $words )
		{
			$this->lexic_permissions['KEYWORDS'][$key] = false;
		}
		foreach ( $this->language_data['COMMENT_SINGLE'] as $key => $comment )
		{
			$this->lexic_permissions['COMMENTS'][$key] = false;
		}
		// Multiline comments
		$this->lexic_permissions['COMMENTS']['MULTI'] = false;
		// Escape characters
		$this->lexic_permissions['ESCAPE_CHAR'] = false;
		// Brackets
		$this->lexic_permissions['BRACKETS'] = false;
		// Strings
		$this->lexic_permissions['STRINGS'] = false;
		// Numbers
		$this->lexic_permissions['NUMBERS'] = false;
		// Methods
		$this->lexic_permissions['METHODS'] = false;
		// Symbols
		$this->lexic_permissions['SYMBOLS'] = false;
		// Regexps
		foreach ( $this->language_data['REGEXPS'] as $key => $regexp )
		{
			$this->lexic_permissions['REGEXPS'][$key] = false;
		}
	}
	
	/**
	 * method: enable_highlighting
	 * ---------------------------
	 * Enables all highlighting
	 */
	function enable_highlighting ()
	{
		foreach ( $this->language_data['KEYWORDS'] as $key => $words )
		{
			$this->lexic_permissions['KEYWORDS'][$key] = true;
		}
		foreach ( $this->language_data['COMMENT_SINGLE'] as $key => $comment )
		{
			$this->lexic_permissions['COMMENTS'][$key] = true;
		}
		// Multiline comments
		$this->lexic_permissions['COMMENTS']['MULTI'] = true;
		// Escape characters
		$this->lexic_permissions['ESCAPE_CHAR'] = true;
		// Brackets
		$this->lexic_permissions['BRACKETS'] = true;
		// Strings
		$this->lexic_permissions['STRINGS'] = true;
		// Numbers
		$this->lexic_permissions['NUMBERS'] = true;
		// Methods
		$this->lexic_permissions['METHODS'] = true;
		// Symbols
		$this->lexic_permissions['SYMBOLS'] = true;
		// Regexps
		foreach ( $this->language_data['REGEXPS'] as $key => $regexp )
		{
			$this->lexic_permissions['REGEXPS'][$key] = true;
		}
	}
	
	/**
	 * method: add_keyword
	 * -------------------
	 * Adds a keyword to a keyword group for highlighting
	 */
	function add_keyword( $key, $word )
	{
		$this->language_data['KEYWORDS'][$key][] = $word;
	}
	
	/**
	 * method: remove_keyword
	 * ----------------------
	 * Removes a keyword from a keyword group
	 */
	function remove_keyword ( $key, $word )
	{
		$this->language_data['KEYWORDS'][$key] = array_diff($this->language_data['KEYWORDS'][$key], array($word));
	}
	
	/**
	 * method: add_keyword_group
	 * -------------------------
	 * Creates a new keyword group
	 */
	function add_keyword_group ( $key, $styles, $case_sensitive = true, $words = array() )
	{
		if ( !is_array($words) )
		{
			$words = array($words);
		}
		$this->language_data['KEYWORDS'][$key] = $words;
		$this->lexic_permissions['KEYWORDS'][$key] = true;
		$this->language_data['CASE_SENSITIVE'][$key] = $case_sensitive;
		$this->language_data['STYLES']['KEYWORDS'][$key] = $styles;
	}
	
	/**
	 * method: remove_keyword_group
	 * ----------------------------
	 * Removes a keyword group
	 */
	function remove_keyword_group ( $key )
	{
		unset($this->language_data['KEYWORDS'][$key]);
		unset($this->lexic_permissions['KEYWORDS'][$key]);
		unset($this->language_data['CASE_SENSITIVE'][$key]);
		unset($this->language_data['STYLES']['KEYWORDS'][$key]);
	}
	
	/**
	 * method: parse_code()
	 * --------------------
	 * Returns the code in $this->source, highlighted and surrounded by the
	 * nessecary HTML. This should only be called ONCE, cos it's SLOW!
	 * If you want to highlight the same source multiple times, you're better
	 * off doing a whole lot of str_replaces to replace the s
	 */
	function parse_code()
	{
		// Firstly, if there is an error, we won't highlight
		// FUTURE: maybe an option to try to force highlighting anyway?
		if ( $this->error )
		{
			$result = $this->header();
			if ( $this->header_type != GESHI_HEADER_PRE )
			{
				$result .= $this->indent(htmlentities($this->source));
			}
			else
			{
				$result .= htmlentities($this->source);
			}
			return $result . $this->footer();
		}
		
		// Add a space for regular expression matching and line numbers
		$code = ' ' . $this->source;
		// Replace all newlines to a common form. 
		$code = str_replace("\r\n", "\n", $code);
		$code = str_replace("\r", "\n", $code);
		
		// Initialise various stuff
		$length = strlen($code);
		$STRING_OPEN = '';
		$CLOSE_STRING = false;
		$ESCAPE_CHAR_OPEN = false;
		$COMMENT_MATCHED = false;
		// Turn highlighting on if strict mode doesn't apply to this language
		$HIGHLIGHTING_ON = ( $this->strict_mode ) ? '' : true;
		// Whether to highlight inside a block of code
		$HIGHLIGHT_INSIDE_STRICT = false;
		$stuff_to_parse = '';
		$result = '';
		
		
		if ( $this->strict_mode )
		{
			// Break the source into bits. Each bit will be a portion of the code
			// within script delimiters - for example, HTML between < and >
			$parts = array(0 => array(0 => ''));
			$k = 0;
			for ( $i = 0; $i < $length; $i++ )
			{
				$char = substr($code, $i, 1);
				if ( !$HIGHLIGHTING_ON )
				{
					foreach ( $this->language_data['SCRIPT_DELIMITERS'] as $key => $delimiters )
					{
						foreach ( $delimiters as $open => $close )
						{
							// Get the next little bit for this opening string
							$check = substr($code, $i, strlen($open));
							// If it matches...
							if ( $check == $open )
							{
								// We start a new block with the highlightable
								// code in it
								$HIGHLIGHTING_ON = $open;
								$i += strlen($open) - 1;
								++$k;
								$char = $open;
								$parts[$k][0] = $char;
								
								// No point going around again...
								break(2);
							}
						}
					}
				}
				else
				{
					foreach ( $this->language_data['SCRIPT_DELIMITERS'] as $key => $delimiters )
					{
						foreach ( $delimiters as $open => $close )
						{
							if ( $open == $HIGHLIGHTING_ON )
							{
								// Found the closing tag
								break(2);
							}
						}
					}
					// We check code from our current position BACKWARDS. This is so
					// the ending string for highlighting can be included in the block
					$check = substr($code, $i - strlen($close) + 1, strlen($close));
					if ( $check == $close )
					{
						$HIGHLIGHTING_ON = '';
						// Add the string to the rest of the string for this part
						$parts[$k][1] = ( isset($parts[$k][1]) ) ? $parts[$k][1] . $char : $char;
						++$k;
						$parts[$k][0] = '';
						$char = '';
					}
				}
				$parts[$k][1] = ( isset($parts[$k][1]) ) ? $parts[$k][1] . $char : $char;
			}
			$HIGHLIGHTING_ON = '';
		}
		else
		{
			// Not strict mode - simply dump the source into
			// the array at index 1 (the first highlightable block)
			$parts = array(
				1 => array(
					0 => '',
					1 => $code
				)
			);
		}
		
		// Now we go through each part. We know that even-indexed parts are
		// code that shouldn't be highlighted, and odd-indexed parts should
		// be highlighted
		foreach ( $parts as $key => $data )
		{
			$part = $data[1];
			// If this block should be highlighted...
			if ( $key % 2 )
			{
				if ( $this->strict_mode )
				{
					// Find the class key for this block of code
					foreach ( $this->language_data['SCRIPT_DELIMITERS'] as $script_key => $script_data )
					{
						foreach ( $script_data as $open => $close )
						{
							if ( $data[0] == $open )
							{
								break(2);
							}
						}
					}

					if ( $this->language_data['STYLES']['SCRIPT'][$script_key] != '' )
					{
						// Add a span element around the source to
						// highlight the overall source block
						if ( !$this->use_classes && $this->language_data['STYLES']['SCRIPT'][$script_key] != '' )
						{
							$attributes = ' style="' . $this->language_data['STYLES']['SCRIPT'][$script_key] . '"';
						}
						else
						{
							$attributes = ' class="sc' . $script_key . '"';
						}
						$result .= "";
					}
				}
				
				if ( !$this->strict_mode || $this->language_data['HIGHLIGHT_STRICT_BLOCK'][$script_key] )
				{
					// Now, highlight the code in this block. This code
					// is really the engine of GeSHi (along with the method
					// parse_non_string_part).
					$length = strlen($part);
					for ( $i = 0; $i < $length; $i++ )
					{
						// Get the next char
						$char = substr($part, $i, 1);
						// Is this a match of a string delimiter?
						if ( $char == $STRING_OPEN )
						{
							if ( ($this->lexic_permissions['ESCAPE_CHAR'] && $ESCAPE_CHAR_OPEN) || ($this->lexic_permissions['STRINGS'] && !$ESCAPE_CHAR_OPEN) )
							{
								$char .= '';
							}
							if ( !$ESCAPE_CHAR_OPEN )
							{
								$STRING_OPEN = '';
								$CLOSE_STRING = true;
							}
							$ESCAPE_CHAR_OPEN = false;
						}
						// Is this the start of a new string?
						elseif ( in_array( $char, $this->language_data['QUOTEMARKS'] ) && ($STRING_OPEN == '') )
						{
							$STRING_OPEN = $char;
							if ( $this->lexic_permissions['STRINGS'] )
							{
								if ( !$this->use_classes )
								{
									$attributes = ' style="' . $this->language_data['STYLES']['STRINGS'][0] . '"';
								}
								else
								{
									$attributes = ' class="st0"';
								}
								$char = "" . $char;
							}
							$result .= $this->parse_non_string_part( $stuff_to_parse );
							$stuff_to_parse = '';
						}
						// Is this an escape char?
						elseif ( ($char == $this->language_data['ESCAPE_CHAR']) && ($STRING_OPEN != '') )
						{
							if ( !$ESCAPE_CHAR_OPEN )
							{
								$ESCAPE_CHAR_OPEN = true;
								if ( $this->lexic_permissions['ESCAPE_CHAR'] )
								{
									if ( !$this->use_classes )
									{
										$attributes = ' style="' . $this->language_data['STYLES']['ESCAPE_CHAR'][0] . '"';
									}
									else
									{
										$attributes = ' class="es0"';
									}
									$char = "" . $char;
								}
							}
							else
							{
								$ESCAPE_CHAR_OPEN = false;
								if ( $this->lexic_permissions['ESCAPE_CHAR'] )
								{
									$char .= '';
								}
							}
						}
						elseif ( $ESCAPE_CHAR_OPEN )
						{
							if ( $this->lexic_permissions['ESCAPE_CHAR'] )
							{
								$char .= '';
							}
							$ESCAPE_CHAR_OPEN = false;
							$test_str = $char;
						}
						elseif ( $STRING_OPEN == '' )
						{
							// Is this a single line comment?
							foreach ( $this->language_data['COMMENT_SINGLE'] as $comment_key => $comment_mark )
							{
								$com_len = strlen($comment_mark);
								$test_str = substr( $part, $i, $com_len );
								if ( $this->language_data['CASE_SENSITIVE'][GESHI_COMMENTS] )
								{
									$match = ( $comment_mark == $test_str );
								}
								else
								{
									$match = ( strtolower($comment_mark) == strtolower($test_str) );
								}
								if ( $match )
								{
									$COMMENT_MATCHED = true;
									if ( $this->lexic_permissions['COMMENTS'][$comment_key] )
									{
										if ( !$this->use_classes )
										{
											$attributes = ' style="' . $this->language_data['STYLES']['COMMENTS'][$comment_key] . '"';
										}
										else
										{
											$attributes = ' class="co' . $comment_key . '"';
										}
										$test_str = "" . htmlentities($this->change_case($test_str));
									}
									else
									{
										$test_str = htmlentities($test_str);
									}
									$close_pos = strpos( $part, "\n", $i );
									if ( $close_pos === false ) 
									{
										$close_pos = strlen($part);
									}
									$test_str .= htmlentities(substr($part, $i + $com_len, $close_pos - $i - $com_len));
									if ( $this->lexic_permissions['COMMENTS'][$comment_key] )
									{
										$test_str .= "";
									}
									$test_str .= "\n";
									$i = $close_pos;
									// parse the rest
									$result .= $this->parse_non_string_part( $stuff_to_parse );
									$stuff_to_parse = '';
									break;
								}
							}
							// Otherwise, is this a multiline comment?
							if ( !$COMMENT_MATCHED )
							{
								foreach ( $this->language_data['COMMENT_MULTI'] as $open => $close )
								{
									$com_len = strlen($open);
									$test_str = substr( $part, $i, $com_len );
									if ( $open == $test_str )
									{
										$COMMENT_MATCHED = true;
										if ( $this->lexic_permissions['COMMENTS']['MULTI'] )
										{
											if ( !$this->use_classes )
											{
												$attributes = ' style="' . $this->language_data['STYLES']['COMMENTS']['MULTI'] . '"';
											}
											else
											{
												$attributes = ' class="coMULTI"';
											}
											$test_str = "" . htmlentities($test_str);
										}
										else
										{
											$test_str = htmlentities($test_str);
										}
										$close_pos = strpos( $part, $close, $i + strlen($close) );
										if ( $close_pos === false ) 
										{
											$close_pos = strlen($part);
										}
										$test_str .= htmlentities(substr($part, $i + $com_len, $close_pos - $i));
										if ( $this->lexic_permissions['COMMENTS']['MULTI'] )
										{
											$test_str .= '';
										}
										$i = $close_pos + $com_len - 1;
										// parse the rest
										$result .= $this->parse_non_string_part( $stuff_to_parse );
										$stuff_to_parse = '';
										break;
									}
								}
							}
						}
						// Otherwise, convert it to HTML form
						elseif ( $STRING_OPEN != '' )
						{
							$char = htmlentities($char);
						}
						// Where are we adding this char?
						if ( !$COMMENT_MATCHED )
						{
							if ( ($STRING_OPEN == '') && !$CLOSE_STRING )
							{
								$stuff_to_parse .= $char;
							}
							else
							{
								$result .= $char;
								$CLOSE_STRING = false;
							}
						}
						else
						{
							$result .= $test_str;
							$COMMENT_MATCHED = false;
						}
					}
					// Parse the last bit
					$result .= $this->parse_non_string_part( $stuff_to_parse );
					$stuff_to_parse = '';
				}
				else
				{
					$result .= htmlentities($part);
				}
				// Close the  that surrounds the block
				if ( $this->strict_mode )
				{
					$result .= '';
				}
			}
			// Else not a block to highlight
			else
			{
				$result .= htmlentities($part);
			}
		}
		
		// Parse the last stuff (redundant?)
		$result .= $this->parse_non_string_part( $stuff_to_parse );
	
		// Lop off the very first space
		$result = substr($result, 1);
		
		// Replace \n with correct endline
		// I'm removing this in 1.0.1, any complaints and I'll
		// put it back in
		//$result = str_replace("\n", "\r\n", $result);
		
		// Indentation
		if ( $this->header_type != GESHI_HEADER_PRE )
		{
			$result = $this->indent($result);
		}
		
		// Add line numbers
		if ( $this->line_numbers != GESHI_NO_LINE_NUMBERS )
		{
			$result = $this->add_line_numbers($result);
		}
		return $this->header() . $result . $this->footer();
	}
	
	/**
	 * method: indent
	 * --------------
	 * Swaps out spaces and tabs for HTML indentation. Not needed if
	 * the code is in a pre block...
	 */
	function indent ( $result )
	{
		$result = str_replace('  ', '  ', $result);
		$result = str_replace('  ', '  ', $result);
		$result = str_replace("\n ", "\n ", $result);
		$result = str_replace("\t", $this->get_tab_replacement(), $result);
		$result = nl2br($result);
		return $result;
	}

	/**
	 * method: change_case
	 * -------------------
	 * Changes the case of a keyword for those languages where a change is asked for
	 */
	function change_case ( $instr )
	{
		if ( $this->language_data['CASE_KEYWORDS'] == GESHI_CAPS_UPPER )
		{
			return strtoupper($instr);
		}
		elseif ( $this->language_data['CASE_KEYWORDS'] == GESHI_CAPS_LOWER )
		{
			return strtolower($instr);
		}
		return $instr;
	}
	
	function parse_non_string_part ( &$stuff_to_parse )
	{
		$stuff_to_parse = ' ' . quotemeta(htmlentities($stuff_to_parse));
		// This var will disappear in the future
		$func = '$this->change_case';

		
		//
		// Regular expressions
		//
		foreach ( $this->language_data['REGEXPS'] as $key => $regexp )
		{
			if ( $this->lexic_permissions['REGEXPS'][$key] )
			{
				$stuff_to_parse = preg_replace( "#(" . $regexp . ")#", "<|!REG3XP$key!>\\1|>", $stuff_to_parse);
			}
		}

		//
		// Highlight numbers. This regexp sucks... anyone with a regexp that WORKS
		// here wins a cookie if they send it to me. At the moment there's two doing
		// almost exactly the same thing, except the second one prevents a number
		// being highlighted twice (eg 5)
		// Put /NUM!/ in for the styles, which gets replaced at the end.
		//
		if ( $this->lexic_permissions['NUMBERS'] && preg_match("#[0-9]#", $stuff_to_parse ) )
		{
			$stuff_to_parse = preg_replace("#([^a-zA-Z0-9\#])([0-9]+)([^a-zA-Z0-9])#", "\\1<|/NUM!/>\\2|>\\3", $stuff_to_parse);
			$stuff_to_parse = preg_replace("#([^a-zA-Z0-9\#>])([0-9]+)([^a-zA-Z0-9])#", "\\1<|/NUM!/>\\2|>\\3", $stuff_to_parse);
		}
		
		// Highlight keywords
		// if there is a couple of alpha symbols there *might* be a keyword
		if ( preg_match("#[a-zA-Z]{2,}#", $stuff_to_parse) )
		{
			foreach ( $this->language_data['KEYWORDS'] as $k => $keywordset )
			{
				if ( $this->lexic_permissions['KEYWORDS'][$k] )
				{
					foreach ( $keywordset as $keyword )
					{
						$keyword = quotemeta($keyword);
						//
						// This replacement checks the word is on it's own (except if brackets etc
						// are next to it), then highlights it. We don't put the color=" for the span
						// in just yet - otherwise languages with the keywords "color" or "or" have
						// a fit.
						//
						if ( false !== stristr($stuff_to_parse, $keyword ) )
						{
							$stuff_to_parse .= ' ';
							// Might make a more unique string for putting the number in soon
							// Basically, we don't put the styles in yet because then the styles themselves will
							// get highlighted if the language has a CSS keyword in it (like CSS, for example ;))
							$styles = "/$k/";
							$keyword = quotemeta($keyword);
							if ( $this->language_data['CASE_SENSITIVE'][$k] )
							{
								$stuff_to_parse = preg_replace("#([^a-zA-Z0-9\$_\|\.\#;>])($keyword)([^a-zA-Z0-9_<\|%\-&])#e", "'\\1<|$styles>' . $func('\\2') . '|>\\3'", $stuff_to_parse);
							}
							else
							{
								// Change the case of the word.
								$stuff_to_parse = preg_replace("#([^a-zA-Z0-9\$_\|\.\#;>])($keyword)([^a-zA-Z0-9_<\|%\-&])#ie", "'\\1<|$styles>' . $func('\\2') . '|>\\3'", $stuff_to_parse);
							}
							$stuff_to_parse = substr($stuff_to_parse, 0, strlen($stuff_to_parse) - 1);
						}
					}
				}
			}
		}
		
		//
		// Now that's all done, replace /[number]/ with the correct styles
		//
		foreach ( $this->language_data['KEYWORDS'] as $k => $kws )
		{
			if ( !$this->use_classes )
			{
				$attributes = ' style="' . $this->language_data['STYLES']['KEYWORDS'][$k] . '"';
			}
			else
			{
				$attributes = ' class="kw' . $k . '"';
			}
			$stuff_to_parse = str_replace("/$k/", $attributes, $stuff_to_parse);
			
			
		}
		
		// Put number styles in
		if ( !$this->use_classes && $this->lexic_permissions['NUMBERS'] )
		{
			$attributes = ' style="' . $this->language_data['STYLES']['NUMBERS'][0] . '"';
		}
		else
		{
			$attributes = ' class="nu0"';
		}
		$stuff_to_parse = str_replace('/NUM!/', $attributes, $stuff_to_parse);

		//
		// Highlight methods and fields in objects
		//
		if ( $this->lexic_permissions['METHODS'] && $this->language_data['OOLANG'] && (false !== stristr($stuff_to_parse, $this->language_data['OBJECT_SPLITTER'])) )
		{
			if ( !$this->use_classes )
			{
				$attributes = ' style="' . $this->language_data['STYLES']['METHODS'][0] . '"';
			}
			else
			{
				$attributes = ' class="me0"';
			}
			$stuff_to_parse = preg_replace("#(" . quotemeta($this->language_data['OBJECT_SPLITTER']) . "[\s]*)([a-zA-Z\*\(][a-zA-Z0-9_\*]*)#", "\\1<|$attributes>\\2|>", $stuff_to_parse);
		}
		
		//
		// Highlight brackets. Yes, I've tried adding a semi-colon to this list.
		// You try it, and see what happens ;)
		// TODO: Fix lexic permissions not converting entities if shouldn't
		// be highlighting regardless
		//
		if ( $this->lexic_permissions['BRACKETS'] )
		{
			$code_entities_match = array('[', ']', '(', ')', '{', '}');
			if ( !$this->use_classes )
			{
				$code_entities_replace = array(
					'<| style="' . $this->language_data['STYLES']['BRACKETS'][0] . '">[|>',
					'<| style="' . $this->language_data['STYLES']['BRACKETS'][0] . '">]|>',
					'<| style="' . $this->language_data['STYLES']['BRACKETS'][0] . '">(|>',
					'<| style="' . $this->language_data['STYLES']['BRACKETS'][0] . '">)|>',
					'<| style="' . $this->language_data['STYLES']['BRACKETS'][0] . '">{|>',
					'<| style="' . $this->language_data['STYLES']['BRACKETS'][0] . '">}|>',
				);
			}
			else
			{
				$code_entities_replace = array(
					'<| class="br0">[|>',
					'<| class="br0">]|>',
					'<| class="br0">(|>',
					'<| class="br0">)|>',
					'<| class="br0">{|>',
					'<| class="br0">}|>',
				);
			}
			$stuff_to_parse = str_replace( $code_entities_match,  $code_entities_replace, $stuff_to_parse );
		}
		
		//
		// Add class/style for regexps
		//
		foreach ( $this->language_data['REGEXPS'] as $key => $regexp )
		{
			if ( $this->lexic_permissions['REGEXPS'][$key] )
			{
				if ( !$this->use_classes )
				{
					$attributes = ' style="' . $this->language_data['STYLES']['REGEXPS'][$key] . '"';
				}
				else
				{
					$attributes = ' class="re' . $key . '"';
				}
				$stuff_to_parse = str_replace("!REG3XP$key!", $attributes, $stuff_to_parse);
			}
		}
	
		//
		// NOW we add the span thingy ;)
		//
		
		$stuff_to_parse = str_replace("<|", "", '', $stuff_to_parse );
	
		return substr(stripslashes($stuff_to_parse), 1);
	}
	
	/**
	 * method: load_language
	 * ---------------------
	 * Gets language information and stores it for later use
	 */
	function load_language ()
	{
		if ( !file_exists($this->language_path . $this->language . '.php') )
		{
			$this->error = GESHI_ERROR_NO_SUCH_LANG;
			return;
		}
		include($this->language_path . $this->language.'.php');
		// Perhaps some checking might be added here later to check that
		// $language data is a valid thing but maybe not
		$this->language_data = $language_data;
		// Set strict mode if should be set
		if ( $this->language_data['STRICT_MODE_APPLIES'] == GESHI_ALWAYS )
		{
			$this->strict_mode = true;
		}
		// Set permissions for all lexics to true
		// so they'll be highlighted by default
		$this->enable_highlighting();
		// Set default class for CSS
		$this->overall_class = $this->language;
	}
	
	/**
	 * method: get_tab_replacement
	 * ---------------------------
	 * Gets the replacement string for tabs in the source code. Useful for
	 * HTML highlighting, where tabs don't mean anything to a browser.
	 */
	function get_tab_replacement ()
	{
		$i = 0;
		$result = '';
		while ( $i < $this->tab_width )
		{
			$i++;
			if ( $i % 2 == 0 )
			{
				$result .= ' ';
			}
			else
			{
				$result .= ' ';
			}
		}
		return $result;
	}
	
	/**
	 * method: add_line_numbers
	 * ------------------------
	 * Adds line numbers to source. Parameter to be removed later
	 */
	function add_line_numbers ( $source )
	{
		$line_container1 = 'use_classes )
		{
			$line_container1 .= " class=\"li1\"";
		}
		elseif ( $this->line_style1 != '' )
		{
			$line_container1 .= " style=\"{$this->line_style1}\"";
		}
		$line_container1 .= '>%s%s%s%s';
		
		if ( $this->line_numbers == GESHI_FANCY_LINE_NUMBERS )
		{
			$line_container2 = 'use_classes )
			{
				$line_container2 .= " class=\"li2\"";
			}
			elseif ( $this->line_style2 != '' )
			{
				$line_container2 .= " style=\"{$this->line_style2}\"";
			}
			$line_container2 .= '>%s%s%s%s';
		}
		
		// Has to be \r\n if I add \r back in later...
		$lines = explode("\n", $source);
		$LINES = count($lines);
		$length = strlen($LINES);
		
		// Create a string with non-breaking spaces in it to indent code
		// from the line numbers.
		// TODO: Able to specify number of spaces extra for $indentation?
		$spaces = '';
		for ( $i = 0; $i < $length; $i++ )
		{
			$spaces .= ' ';
		}
		$indentation = ' ';
		// The value used to decide whether the second class is used
		$stopper = $this->line_nth_row - 1;
		// Put the line numbers into each line.
		for ( $i = 0; $i < $LINES; $i++ )
		{
			if ( $this->line_numbers == GESHI_FANCY_LINE_NUMBERS )
			{
				$container = ( $i % $this->line_nth_row != $stopper ) ? 'line_container1' : 'line_container2';
			}
			else
			{
				$container = 'line_container1';
			}
			$lines[$i] = sprintf($$container, $i + 1, substr($spaces, 0, ($length - strlen($i + 1)) * 6), $indentation, $lines[$i] );
		}
		return implode("\n", $lines);
	}
	
	/**
	 * method: header
	 * --------------
	 * Creates the header for the code block (with correct attributes)
	 */
	function header ()
	{
		$attributes = '';
		if ( $this->overall_class != '' && $this->use_classes )
		{
			$attributes .= " class=\"{$this->overall_class}\"";
		}
		if ( $this->overall_id != '' )
		{
			$attributes .= " id=\"{$this->overall_id}\"";
		}
		if ( $this->overall_style != '' && !$this->use_classes )
		{
			$attributes .= ' style="' . $this->overall_style . '"';
		}
		if ( $this->header_type == GESHI_HEADER_DIV )
		{
			return "";
		}
		return "";
	}
	
	/**
	 * method: footer
	 * --------------
	 * Returns the footer for the code block
	 */
	function footer ()
	{
		if ( $this->header_type == GESHI_HEADER_DIV )
		{
			return "