,,, and <javascript> tags
				// We'll want to return them to this unprocessed state later.
				preg_match_all('{<pre.+</pre>}msU', $output, $pres_clean);
				preg_match_all('{<code.+</code>}msU', $output, $codes_clean);
				preg_match_all('{<textarea.+}msU', $output, $textareas_clean);
				preg_match_all('{}msU', $output, $javascript_clean);

				// Minify the CSS in all the }msU', $output, $style_clean);
				foreach ($style_clean[0] as $s)
				{
					$output = str_replace($s, $this->_minify_js_css($s, 'css', TRUE), $output);
				}

				// Minify the javascript in }msU', $output, $javascript_messed);
					$output = str_replace($javascript_messed[0], $javascript_mini, $output);
				}

				$size_removed = $size_before - strlen($output);
				$savings_percent = round(($size_removed / $size_before * 100));

				log_message('debug', 'Minifier shaved '.($size_removed / 1000).'KB ('.$savings_percent.'%) off final HTML output.');

			break;

			case 'text/css':

				return $this->_minify_js_css($output, 'css');

			case 'text/javascript':
			case 'application/javascript':
			case 'application/x-javascript':

				return $this->_minify_js_css($output, 'js');

			default: break;
		}

		return $output;
	}

	// --------------------------------------------------------------------

	protected function _minify_js_css($output, $type, $tags = FALSE)
	{
		if ($tags === TRUE)
		{
			$tags = array('close' => strrchr($output, '<'));

			$open_length = strpos($output, '>') + 1;
			$tags['open'] = substr($output, 0, $open_length);

			$output = substr($output, $open_length, -strlen($tags['close']));

			// Strip spaces from the tags
			$tags = preg_replace('#\s{2,}#', ' ', $tags);
		}

		$output = trim($output);

		if ($type === 'js')
		{
			// Catch all string literals and comment blocks
			if (preg_match_all('#((?:((? '',		// Remove // line comments
				'#\s*([!#%&()*+,\-./:;<=>?@\[\]^`{|}~])\s*#'	=> '$1',	// Remove spaces following and preceeding JS-wise non-special & non-word characters
				'#\s{2,}#'					=> ' '		// Reduce the remaining multiple whitespace characters to a single space
			);
		}
		else
		{
			$patterns = array(
				'#/\*.*(?=\*/)\*/#s'	=> '',		// Remove /* block comments */
				'#\n?//[^\n]*#'		=> '',		// Remove // line comments
				'#\s*([^\w.#%)\s*#U'	=> '$1',	// Remove spaces following and preceeding non-word characters, excluding dots, hashes and the percent sign
				'#\s{2,}#'		=> ' '		// Reduce the remaining multiple space characters to a single space
			);
		}

		$$varname = preg_replace(array_keys($patterns), array_values($patterns), $$varname);

		// Glue back JS quoted strings
		if ($type === 'js')
		{
			$js_code += $js_literals;
			ksort($js_code);
			$output = implode($js_code);
			unset($js_code, $js_literals, $varname, $patterns);
		}

		return is_array($tags)
			? $tags['open'].$output.$tags['close']
			: $output;
	}

	// --------------------------------------------------------------------

	/**
	 * Minify Style and Script
	 *
	 * Reduce excessive size of CSS/JavaScript content.  To remove spaces this
	 * script walks the string as an array and determines if the pointer is inside
	 * a string created by single quotes or double quotes.  spaces inside those
	 * strings are not stripped.  Opening and closing tags are severed from
	 * the string initially and saved without stripping whitespace to preserve
	 * the tags and any associated properties if tags are present
	 *
	 * Minification logic/workflow is similar to methods used by Douglas Crockford
	 * in JSMIN. http://www.crockford.com/javascript/jsmin.html
	 *
	 * KNOWN ISSUE: ending a line with a closing parenthesis ')' and no semicolon
	 * where there should be one will break the Javascript. New lines after a
	 * closing parenthesis are not recognized by the script. For best results
	 * be sure to terminate lines with a semicolon when appropriate.
	 *
	 * @param	string	$output		Output to minify
	 * @param	bool	$has_tags	Specify if the output has style or script tags
	 * @return	string	Minified output
	 */
	protected function _minify_script_style($output, $has_tags = FALSE)
	{
		// We only need this if there are tags in the file
		if ($has_tags === TRUE)
		{
			// Remove opening tag and save for later
			$pos = strpos($output, '>') + 1;
			$open_tag = substr($output, 0, $pos);
			$output = substr_replace($output, '', 0, $pos);

			// Remove closing tag and save it for later
			$pos = strrpos($output, '= 0; $i--)
		{
			$output = substr_replace(
				$output,
				preg_replace('/\s*(:|;|,|}|{|\(|\))\s*/i', '$1', $chunks[$i][0]),
				$chunks[$i][1],
				strlen($chunks[$i][0])
			);
		}

		// Replace tabs with spaces
		// Replace carriage returns & multiple new lines with single new line
		// and trim any leading or trailing whitespace
		$output = trim(preg_replace(array('/\t+/', '/\r/', '/\n+/'), array(' ', "\n", "\n"), $output));

		// Remove spaces when safe to do so.
		$in_string = $in_dstring = $prev = FALSE;
		$array_output = str_split($output);
		foreach ($array_output as $key => $value)
		{
			if ($in_string === FALSE && $in_dstring === FALSE)
			{
				if ($value === ' ')
				{
					// Get the next element in the array for comparisons
					$next = $array_output[$key + 1];

					// Strip spaces preceded/followed by a non-ASCII character
					// that are not preceded/followed by an alphanumeric character,
					// '\', '$', '_', '.' and '#'
					if ((preg_match('/^[\x20-\x7f]*$/D', $next) OR preg_match('/^[\x20-\x7f]*$/D', $prev))
						&& ( ! ctype_alnum($next) OR ! ctype_alnum($prev))
						&& ! in_array($next, array('\\', '_', '$', '.', '#'), TRUE)
						&& ! in_array($prev, array('\\', '_', '$', '.', '#'), TRUE)
					)
					{
						unset($array_output[$key]);
					}
				}
				else
				{
					// Save this value as previous for the next iteration
					// if it is not a blank space
					$prev = $value;
				}
			}

			if ($value === "'" && ! $in_dstring)
			{
				$in_string = ! $in_string;
			}
			elseif ($value === '"' && ! $in_string)
			{
				$in_dstring = ! $in_dstring;
			}
		}

		// Put the string back together after spaces have been stripped
		$output = implode($array_output);

		// Remove new line characters unless previous or next character is
		// printable or Non-ASCII
		preg_match_all('/[\n]/', $output, $lf, PREG_OFFSET_CAPTURE);
		$removed_lf = 0;
		foreach ($lf as $feed_position)
		{
			foreach ($feed_position as $position)
			{
				$position = $position[1] - $removed_lf;
				$next = $output[$position + 1];
				$prev = $output[$position - 1];
				if ( ! ctype_print($next) && ! ctype_print($prev)
					&& ! preg_match('/^[\x20-\x7f]*$/D', $next)
					&& ! preg_match('/^[\x20-\x7f]*$/D', $prev)
				)
				{
					$output = substr_replace($output, '', $position, 1);
					$removed_lf++;
				}
			}
		}

		// Put the opening and closing tags back if applicable
		return isset($open_tag)
			? $open_tag.$output.$closing_tag
			: $output;
	}

}

/* End of file Output.php */
/* Location: ./system/core/Output.php */