/**
* @param $tpl template object
* @return bool optimize success or not
*/
public static function optimizecss($tpl)
{
$outputpath = JPATH_ROOT . '/' . $tpl->getParam('plazart-assets', 'plazart-assets') . '/css';
$outputurl = JURI::root(true) . '/' . $tpl->getParam('plazart-assets', 'plazart-assets') . '/css';
if (!JFile::exists($outputpath)) {
JFolder::create($outputpath);
@chmod($outputpath, 0755);
}
if (!is_writeable($outputpath)) {
return false;
}
//prepare config
self::prepare($tpl);
$doc = JFactory::getDocument();
//======================= Group css ================= //
$mediagroup = array();
$cssgroups = array();
$stylesheets = array();
$ielimit = 4095;
$selcounts = 0;
$regex = '/\\{.+?\\}|,/s';
//selector counter
$csspath = '';
// group css into media
$mediagroup['all'] = array();
$mediagroup['screen'] = array();
foreach ($doc->_styleSheets as $url => $stylesheet) {
$media = $stylesheet['media'] ? $stylesheet['media'] : 'all';
if (empty($mediagroup[$media])) {
$mediagroup[$media] = array();
}
$mediagroup[$media][$url] = $stylesheet;
}
foreach ($mediagroup as $media => $group) {
$stylesheets = array();
// empty - begin a new group
foreach ($group as $url => $stylesheet) {
$url = self::fixUrl($url);
if ($stylesheet['mime'] == 'text/css' && ($csspath = self::cssPath($url))) {
$stylesheet['path'] = $csspath;
$stylesheet['data'] = file_get_contents($csspath);
$selcount = preg_match_all($regex, $stylesheet['data'], $matched);
if (!$selcount) {
$selcount = 1;
//just for sure
}
//if we found an @import rule or reach IE limit css selector count, break into the new group
if (preg_match('#@import\\s+.+#', $stylesheet['data']) || $selcounts + $selcount >= $ielimit) {
if (count($stylesheets)) {
$cssgroup = array();
$groupname = array();
foreach ($stylesheets as $gurl => $gsheet) {
$cssgroup[$gurl] = $gsheet;
$groupname[] = $gurl;
}
$cssgroup['groupname'] = implode('', $groupname);
$cssgroup['media'] = $media;
$cssgroups[] = $cssgroup;
}
$stylesheets = array($url => $stylesheet);
// empty - begin a new group
$selcounts = $selcount;
} else {
$stylesheets[$url] = $stylesheet;
$selcounts += $selcount;
}
} else {
// first get all the stylsheets up to this point, and get them into
// the items array
if (count($stylesheets)) {
$cssgroup = array();
$groupname = array();
foreach ($stylesheets as $gurl => $gsheet) {
$cssgroup[$gurl] = $gsheet;
$groupname[] = $gurl;
}
$cssgroup['groupname'] = implode('', $groupname);
$cssgroup['media'] = $media;
$cssgroups[] = $cssgroup;
}
//mark ignore current stylesheet
$cssgroup = array($url => $stylesheet, 'ignore' => true);
$cssgroups[] = $cssgroup;
$stylesheets = array();
// empty - begin a new group
}
}
if (count($stylesheets)) {
$cssgroup = array();
$groupname = array();
foreach ($stylesheets as $gurl => $gsheet) {
$cssgroup[$gurl] = $gsheet;
$groupname[] = $gurl;
}
$cssgroup['groupname'] = implode('', $groupname);
$cssgroup['media'] = $media;
$cssgroups[] = $cssgroup;
}
}
//======================= Group css ================= //
$output = array();
foreach ($cssgroups as $cssgroup) {
if (isset($cssgroup['ignore'])) {
unset($cssgroup['ignore']);
unset($cssgroup['groupname']);
unset($cssgroup['media']);
foreach ($cssgroup as $furl => $fsheet) {
$output[$furl] = $fsheet;
}
} else {
$media = $cssgroup['media'];
$groupname = 'css-' . substr(md5($cssgroup['groupname']), 0, 5) . '.css';
$groupfile = $outputpath . '/' . $groupname;
$grouptime = JFile::exists($groupfile) ? @filemtime($groupfile) : -1;
$rebuild = $grouptime < 0;
//filemtime == -1 => rebuild
unset($cssgroup['groupname']);
unset($cssgroup['media']);
foreach ($cssgroup as $furl => $fsheet) {
if (!$rebuild && @filemtime($fsheet['path']) > $grouptime) {
$rebuild = true;
}
}
if ($rebuild) {
$cssdata = array();
foreach ($cssgroup as $furl => $fsheet) {
$cssdata[] = "\n\n/*===============================";
$cssdata[] = $furl;
$cssdata[] = "================================================================================*/";
$cssmin = self::minifyCss($fsheet['data']);
$cssmin = PlazartPath::updateUrl($cssmin, PlazartPath::relativePath($outputurl, dirname($furl)));
$cssdata[] = $cssmin;
}
$cssdata = implode("\n", $cssdata);
if (!JFile::write($groupfile, $cssdata)) {
// cannot write file, ignore minify
return false;
}
$grouptime = @filemtime($groupfile);
@chmod($groupfile, 0644);
}
$output[$outputurl . '/' . $groupname . '?t=' . $grouptime % 1000] = array('mime' => 'text/css', 'media' => $media == 'all' ? NULL : $media, 'attribs' => array());
}
}
//apply the change make change
$doc->_styleSheets = $output;
}
function compileCss($path, $topath = '')
{
$app = JFactory::getApplication();
$theme = $app->getUserState('vars_theme');
$realpath = realpath(JPATH_ROOT . '/' . $path);
// check path
if (!is_file($realpath)) {
//if (!JPath::check ($realpath)){
return;
}
// Get file content
$content = JFile::read($realpath);
// remove comments
$content = preg_replace('!/\\*[^*]*\\*+([^/][^*]*\\*+)*/!', '', $content);
// split into array, separated by the import
$arr = preg_split('#^\\s*@import\\s+"([^"]*)"\\s*;#im', $content, -1, PREG_SPLIT_DELIM_CAPTURE);
// check and add theme less if not is theme less
if ($theme && !preg_match('#themes/#', $path)) {
$themepath = 'themes/' . $theme . '/' . basename($path);
if (is_file(PLAZART_TEMPLATE_PATH . '/less/' . $themepath)) {
$arr[] = $themepath;
$arr[] = '';
}
}
// variables & mixin
$vars = $this->getVars();
// add vars
$this->setImportDir(array(dirname($realpath), PLAZART_TEMPLATE_PATH . '/less/'));
// compile chuck
$import = false;
$output = '';
foreach ($arr as $s) {
if ($import) {
$import = false;
if ($s == 'vars.less') {
continue;
}
// process import file
$url = PlazartPath::cleanPath(dirname($path) . '/' . $s);
$importcontent = JFile::read(JPATH_ROOT . '/' . $url);
$output .= "#less-file-path{content: \"{$url}\";}\n" . $importcontent . "\n\n";
} else {
$import = true;
$s = trim($s);
if ($s) {
$output .= "#less-file-path{content: \"{$path}\";}\n" . $s . "\n\n";
}
}
}
$output = $this->compile($vars . "\n" . $output);
$arr = preg_split('#^\\s*\\#less-file-path\\s*{\\s*[\\r\\n]*\\s*content:\\s*"([^"]*)";\\s*[\\r\\n]*\\s*}#im', $output, -1, PREG_SPLIT_DELIM_CAPTURE);
$output = '';
$file = '';
$isfile = false;
foreach ($arr as $s) {
if ($isfile) {
$isfile = false;
$file = $s;
$relpath = $topath ? PlazartPath::relativePath(dirname($topath), dirname($file)) : JURI::base(true) . '/' . dirname($file);
} else {
$output .= ($file ? PlazartPath::updateUrl($s, $relpath) : $s) . "\n\n";
$isfile = true;
}
}
// remove the dupliate clearfix at the beggining if not bootstrap.css file
if (!preg_match('#bootstrap.less#', $path)) {
$arr = preg_split('/[\\r?\\n]{2,}/', $output);
// ignore first one, it's clearfix
array_shift($arr);
$output = implode("\n", $arr);
}
if ($topath) {
$tofile = JPATH_ROOT . '/' . $topath;
if (!is_dir(dirname($tofile))) {
JFolder::create(dirname($tofile));
}
$ret = JFile::write($tofile, $output);
@chmod($tofile, 0644);
return $ret;
}
return $output;
}
