/**
* Optimize css base on list css
*
* @param array $css_urls List of css file
*
* @return array List of optimized css file
*/
public static function optimizecss($css_urls)
{
$content = '';
$optimize_css = T3Parameter::_getParam('optimize_css', 2);
if (!$optimize_css) {
return $css_urls;
//no optimize css
}
// # Fix when optimized_folder is un-writeable
$cachepath = T3Path::path(T3Parameter::_getParam('optimize_folder', 't3-assets'));
$cachepath .= DS . 'css';
//$parentpath = dirname($cachepath);
if (!T3Common::checkWriteable($cachepath)) {
return $css_urls;
}
$output = array();
$optimize_exclude = trim(T3Parameter::_getParam('optimize_exclude', ''));
$optimize_exclude_regex = null;
if ($optimize_exclude) {
$optimize_exclude_regex = '#' . preg_replace('#[\\r\\n]+#', '|', preg_quote($optimize_exclude)) . '#';
}
$files = array();
// # Check lock file before start checking update
$lock_file = "optimize.js.lock";
$waiting = T3Head::optimizeCheckLock($cachepath, $lock_file);
$lock_file_file = null;
$needupdate = false;
$need_optimize = false;
$required_optimize_list = array();
$files_array = array();
// Limit files import into a css file (in IE7, only first 30 css files are loaded). other case, load unlimited
$filelimit = $optimize_css == 1 ? 20 : 999;
$filecount = 0;
jimport('joomla.filesystem.file');
foreach ($css_urls as $theme => $urls) {
foreach ($urls as $url) {
$ignore = false;
$import = false;
$importupdate = false;
// check ignore to optimize
// - not a local file
// - not a css file
// - in ignore list
if (!$url[0]) {
$ignore = true;
} elseif (!preg_match('#\\.css$#', $url[0])) {
$ignore = true;
//ignore dynamic css file
} elseif ($optimize_exclude_regex && preg_match($optimize_exclude_regex, $url[1])) {
$ignore = true;
}
if (!$ignore && $optimize_css > 1) {
//check if need update. for css, the cache should be [filename] or [filename]-import
//[filename]-import - for the case there's @import inside
//in the ignore of @import, file still optimize but will be put into a sigle file
$cfile = $cachepath . DS . 'css_' . md5($url[0]) . '.' . basename($url[0]);
if (!(file_exists($cfile) && @filemtime($url[0]) < @filemtime($cfile)) && !(file_exists($cfile . '-import') && @filemtime($url[0]) < @filemtime($cfile . '-import'))) {
$required_optimize_list[] = array('cfile' => $cfile, 'url0' => $url[0], 'url1' => $url[1]);
//Need update
$data = @JFile::read($url[0]);
if (preg_match('#@import\\s+.+#', $data)) {
$import = true;
$importupdate = true;
$cfile = $cfile . '-import';
}
$needupdate = true;
$need_optimize = true;
} elseif (is_file($cfile . '-import')) {
$import = true;
$importupdate = false;
$cfile = $cfile . '-import';
}
}
//match ignore file, or import file, or reach the limit: flush previous files out
if ($ignore || $import || count($files) == $filelimit) {
if (count($files)) {
$files_array[] = array('files' => $files, 'needupdate' => $needupdate);
}
//reset the flag for file update
$needupdate = false;
$files = array();
}
//write out the @import file
if ($ignore) {
//$output[] = $url;
// Ignore file however must follow by order
$files_array[] = array('files' => $url, 'ignore' => true);
} else {
if ($optimize_css > 1) {
$files[] = array($cfile, '', $url[2]);
} else {
$files[] = $url;
}
}
}
}
if ($need_optimize) {
//# Only create lock if and only if require optimize
if (!T3Head::optimizeCreateLock($cachepath, $lock_file)) {
return false;
}
foreach ($required_optimize_list as $required_optimize) {
$data = T3Head::compresscss(@JFile::read($required_optimize['url0']), $required_optimize['url1']);
if (preg_match('#@import\\s+.+#', $data)) {
$import = true;
$importupdate = true;
$required_optimize['cfile'] = $required_optimize['cfile'] . '-import';
}
if (JFile::exists($required_optimize['cfile'])) {
@JFile::delete($required_optimize['cfile']);
}
if (JFile::exists($required_optimize['cfile'] . '-import')) {
@JFile::delete($required_optimize['cfile'] . '-import');
}
@JFile::write($required_optimize['cfile'], $data);
$needupdate = true;
}
}
if (count($files)) {
$files_array[] = array('files' => $files, 'needupdate' => $needupdate);
}
foreach ($files_array as $group_files) {
// Check ignore file
if (!isset($group_files['ignore'])) {
$ourl = T3Head::store_file2($group_files['files'], 'css', $group_files['needupdate']);
if (!$ourl) {
return $css_urls;
}
$output[] = array('', $ourl);
} else {
$output[] = $group_files['files'];
}
}
// # Release lock
T3Head::optimizeReleaseLock($cachepath, $lock_file);
return array($output);
}
