public static function minifyCSS($css_content, $fileuri = false, &$import_url = array())
{
global $current_css_file;
$current_css_file = $fileuri;
if (strlen($css_content) > 0) {
$limit = Media::getBackTrackLimit();
$css_content = preg_replace('#/\\*.*?\\*/#s', '', $css_content, $limit);
$css_content = preg_replace_callback('#(url\\((?![\\\'"]?data:)(?!http://)(?!https://)(?:\'|")?)([^\\)\'"]*(?:\'|")?\\))#s', array('Tools', 'replaceByAbsoluteURL'), $css_content, $limit);
$css_content = preg_replace('#\\s+#', ' ', $css_content, $limit);
$css_content = str_replace(array("\t", "\n", "\r"), '', $css_content);
$css_content = str_replace(array('; ', ': '), array(';', ':'), $css_content);
$css_content = str_replace(array(' {', '{ '), '{', $css_content);
$css_content = str_replace(', ', ',', $css_content);
$css_content = str_replace(array('} ', ' }', ';}'), '}', $css_content);
$css_content = str_replace(array(':0px', ':0em', ':0pt', ':0%'), ':0', $css_content);
$css_content = str_replace(array(' 0px', ' 0em', ' 0pt', ' 0%'), ' 0', $css_content);
$css_content = str_replace('\'images_ie/', '\'images/', $css_content);
$css_content = preg_replace_callback('#(AlphaImageLoader\\(src=\')([^\']*\',)#s', array('Tools', 'replaceByAbsoluteURL'), $css_content);
// Store all import url
preg_match_all('#@(import|charset) .*?;#i', $css_content, $m);
for ($i = 0, $total = count($m[0]); $i < $total; $i++) {
if (isset($m[1][$i]) && $m[1][$i] == 'import') {
$import_url[] = $m[0][$i];
}
$css_content = str_replace($m[0][$i], '', $css_content);
}
return trim($css_content);
}
return false;
}
protected static function _removeScriptCB($m)
{
$openScript = $m[1];
$js = $m[2];
// remove HTML comments (and ending "//" if present)
$js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $js, Media::getBackTrackLimit());
// remove CDATA section markers
$js = self::_removeCdata($js);
// minify
$minifier = self::$_jsMinifier ? self::$_jsMinifier : 'trim';
$js = call_user_func($minifier, $js);
return self::_reservePlace(self::_needsCdata($js) ? "{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>" : "{$openScript}{$js}</script>");
}
/**
* Minify the markeup given in the constructor
*
* @return string
*/
public function process()
{
if ($this->_isXhtml === null) {
$this->_isXhtml = false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML');
}
$this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
$this->_placeholders = array();
// replace SCRIPTs (and minify) with placeholders
$this->_html = preg_replace_callback('/(\\s*)<script(\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i', array($this, '_removeScriptCB'), $this->_html, Media::getBackTrackLimit());
// replace STYLEs (and minify) with placeholders
$this->_html = preg_replace_callback('/\\s*<style(\\b[^>]*>)([\\s\\S]*?)<\\/style>\\s*/i', array($this, '_removeStyleCB'), $this->_html, Media::getBackTrackLimit());
// remove HTML comments (not containing IE conditional comments).
$this->_html = preg_replace_callback('/<!--([\\s\\S]*?)-->/', array($this, '_commentCB'), $this->_html, Media::getBackTrackLimit());
// replace PREs with placeholders
$this->_html = preg_replace_callback('/\\s*<pre(\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i', array($this, '_removePreCB'), $this->_html, Media::getBackTrackLimit());
// replace TEXTAREAs with placeholders
$this->_html = preg_replace_callback('/\\s*<textarea(\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i', array($this, '_removeTextareaCB'), $this->_html, Media::getBackTrackLimit());
// trim each line.
// @todo take into account attribute values that span multiple lines.
$this->_html = preg_replace('/^\\s+|\\s+$/m', '', $this->_html);
// remove ws around block/undisplayed elements
$this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body' . '|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form' . '|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta' . '|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)' . '|ul)\\b[^>]*>)/i', '$1', $this->_html);
// remove ws outside of all elements
$this->_html = preg_replace('/>(\\s(?:\\s*))?([^<]+)(\\s(?:\\s*))?</', '>$1$2$3<', $this->_html);
// use newlines before 1st attribute in open tags (to limit line lengths)
// $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);
$this->_html = preg_replace('/\\s+/m', ' ', $this->_html);
// fill placeholders
$this->_html = str_replace(array_keys($this->_placeholders), array_values($this->_placeholders), $this->_html);
// issue 229: multi-pass to catch scripts that didn't get replaced in textareas
$this->_html = str_replace(array_keys($this->_placeholders), array_values($this->_placeholders), $this->_html);
return $this->_html;
}
/**
* Minify CSS
*
* @param string $cssContent
* @param bool $fileUri
* @param array $importUrl
*
* @return bool|string
*/
public static function minifyCSS($cssContent, $fileUri = false, &$importUrl = array())
{
Media::$current_css_file = $fileUri;
if (strlen($cssContent) > 0) {
$cssContent = \Minify_CSSmin::minify($cssContent);
$limit = Media::getBackTrackLimit();
$cssContent = preg_replace_callback(Media::$pattern_callback, array('Media', 'replaceByAbsoluteURL'), $cssContent, $limit);
$cssContent = str_replace('\'images_ie/', '\'images/', $cssContent);
$cssContent = preg_replace_callback('#(AlphaImageLoader\\(src=\')([^\']*\',)#s', array('Tools', 'replaceByAbsoluteURL'), $cssContent);
// Store all import url
preg_match_all('#@(import|charset) .*?;#i', $cssContent, $m);
for ($i = 0, $total = count($m[0]); $i < $total; $i++) {
if (isset($m[1][$i]) && $m[1][$i] == 'import') {
$importUrl[] = $m[0][$i];
}
$cssContent = str_replace($m[0][$i], '', $cssContent);
}
return trim($cssContent);
}
return false;
}