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<?php
/**
* @package JCE
* @copyright Copyright (c) 2009-2014 Ryan Demmer. All rights reserved.
* @license GNU/GPL 2 or later - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* JCE is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
*/
defined('_JEXEC') or die('RESTRICTED');
class WFPacker extends JObject {
const IMPORT_RX = '#@import([^;]+);#i';
protected $files = array();
protected $type = 'javascript';
protected $text = '';
protected $start = '';
protected $end = '';
protected static $imports = array();
/**
* Constructor activating the default information of the class
*
* @access protected
*/
function __construct($config = array()) {
$this->setProperties($config);
}
public function setFiles($files = array()) {
$this->files = $files;
}
public function getFiles() {
return $this->files;
}
public function setText($text = '') {
$this->text = $text;
}
public function setContentStart($start = '') {
$this->start = $start;
}
public function getContentStart() {
return $this->start;
}
public function setContentEnd($end = '') {
$this->end = $end;
}
public function getContentEnd() {
return $this->end;
}
public function setType($type) {
$this->type = $type;
}
public function getType() {
return $this->type;
}
/**
* Get encoding
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
*/
private static function getEncoding() {
if (!isset($_SERVER['HTTP_ACCEPT_ENCODING'])) {
return false;
}
$encoding = false;
if (false !== strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')) {
$encoding = 'gzip';
}
if (false !== strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip')) {
$encoding = 'x-gzip';
}
return $encoding;
}
public function pack($minify = true, $gzip = false) {
$type = $this->getType();
ob_start();
// Headers
if ($type == 'javascript') {
header("Content-type: application/javascript; charset: UTF-8");
}
if ($type == 'css') {
header("Content-type: text/css; charset: UTF-8");
}
// encoding
header("Vary: Accept-Encoding");
// expires after 48 hours
$expires = 60 * 60 * 24 * 2;
header("Cache-Control: maxage=" . $expires);
// Handle proxies
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $expires) . " GMT");
$files = $this->getFiles();
$encoding = self::getEncoding();
$zlib = function_exists('ini_get') && extension_loaded('zlib') && ini_get('zlib.output_compression');
$gzip = $gzip && !empty($encoding) && !$zlib && function_exists('gzencode');
$content = $this->getContentStart();
if (empty($files)) {
$content .= $this->getText();
} else {
foreach ($files as $file) {
$content .= $this->getText($file, $minify);
}
}
if ($this->getType() == 'css') {
// move external import rules to top
foreach (array_unique(self::$imports) as $import) {
if (strpos($import, '//') !== false) {
$content = '@import url("' . $import . '");' . $content;
}
}
}
$content .= $this->getContentEnd();
// get content hash
$hash = md5($content);
// set etag header
header("ETag: \"{$hash}\"");
// Generate GZIP'd content
if ($gzip) {
header("Content-Encoding: " . $encoding);
$content = gzencode($content, 4, FORCE_GZIP);
}
// stream to client
echo $content;
exit(ob_get_clean());
}
protected function jsmin($data) {
// remove header comments
return preg_replace('#^\/\*[\s\S]+?\*\/#', '', $data);
}
/**
* Simple CSS Minifier
* https://github.com/GaryJones/Simple-PHP-CSS-Minification
* @param $data Data string to minify
*/
protected function cssmin($css) {
// Normalize whitespace
//$css = preg_replace('/\s+/', ' ', $css);
// Remove comment blocks, everything between /* and */, unless
// preserved with /*! ... */
//$css = preg_replace('/\/\*[^\!](.*?)\*\//', '', $css);
// Remove space after , : ; { }
//$css = preg_replace('/(,|:|;|\{|}) /', '$1', $css);
// Remove space before , ; { }
//$css = preg_replace('/ (,|;|\{|})/', '$1', $css);
// Strips leading 0 on decimal values (converts 0.5px into .5px)
//$css = preg_replace('/(:| )0\.([0-9]+)(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}.${2}${3}', $css);
// Strips units if value is 0 (converts 0px to 0)
//$css = preg_replace('/(:| )(\.?)0(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}0', $css);
// Converts all zeros value into short-hand
//$css = preg_replace('/0 0 0 0/', '0', $css);
// Shortern 6-character hex color codes to 3-character where possible
//$css = preg_replace('/#([a-f0-9])\\1([a-f0-9])\\2([a-f0-9])\\3/i', '#\1\2\3', $css);
require_once(dirname(__FILE__) . '/cssmin.php');
$min = new CSSmin();
$css = $min->run($css);
return trim($css);
}
/**
* Import CSS from a file
* @param file File path where data comes from
* @param $data Data from file
*/
protected function importCss($data, $file) {
if (preg_match_all(self::IMPORT_RX, $data, $matches)) {
$data = '';
foreach ($matches[1] as $match) {
// clean up url
$match = str_replace(array('url', '"', "'", '(', ')'), '', $match);
// trim
$match = trim($match);
if ($match) {
// external url, skip it
if (strpos($match, '//') !== false) {
// add to imports list
self::$imports[] = $match;
continue;
}
// url has a query, remove
if (strpos($match, '?') !== false) {
$match = substr($match, 0, strpos($match, '?'));
}
if (strpos($match, '&') !== false) {
$match = substr($match, 0, strpos($match, '&'));
}
// get full path
$path = realpath($this->get('_cssbase') . '/' . $match);
// already import, don't repeat!
if (in_array($path, self::$imports)) {
continue;
}
// get data
$data .= $this->getText($path);
}
}
return $data;
}
return '';
}
protected function compileLess($string, $path) {
require_once(WF_ADMINISTRATOR . '/classes/lessc.inc.php');
$less = new lessc;
// add file directory
$less->addImportDir($path);
// add joomla media folder
$less->addImportDir(JPATH_SITE . 'media');
try {
return $less->compile($string);
} catch (Exception $e) {
return "/* LESS file could not be compiled due to error - " . $e->getMessage() . " */";
}
}
protected function getText($file = null, $minify = true) {
if ($file && is_file($file)) {
$text = file_get_contents($file);
if ($text) {
// process css files
if ($this->getType() == 'css') {
// compile less files
if (preg_match('#\.less$#', $file)) {
$text = $this->compileLess($text, dirname($file));
}
if ($minify) {
// minify
$text = $this->cssmin($text, $file);
}
// add to imports list
self::$imports[] = $file;
if (strpos($text, '@import') !== false) {
// store the base path of the current file
$this->set('_cssbase', dirname($file));
// process import rules
$text = $this->importCss($text, $file) . preg_replace(self::IMPORT_RX, '', $text);
}
// store the base path of the current file
$this->set('_imgbase', dirname($file));
// process urls
$text = preg_replace_callback('#url\s?\([\'"]?([^\'"\))]+)[\'"]?\)#', array('WFPacker', 'processPaths'), $text);
}
// make sure text ends in a semi-colon;
if ($this->getType() == 'javascript') {
$text = rtrim(trim($text), ';') . ';';
if ($minify) {
$text = $this->jsmin($text);
}
}
return $text;
}
}
return $this->text;
}
protected function processPaths($data) {
if (isset($data[1])) {
if (strpos($data[1], '//') === false) {
$path = str_replace(JPATH_SITE, '', realpath($this->get('_imgbase') . '/' . $data[1]));
if ($path) {
return "url('" . JURI::root(true) . str_replace('\\', '/', $path) . "')";
}
return "url('" . $data[1] . "')";
}
return $data[1];
}
return "";
}
}
?>