/**
* In CSS content, rewrite file relative URIs as root relative
*
* @param string $css
*
* @param string $currentDir The directory of the current CSS file.
*
* @param string $docRoot The document root of the web site in which
* the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']).
*
* @param array $symlinks (default = array()) If the CSS file is stored in
* a symlink-ed directory, provide an array of link paths to
* target paths, where the link paths are within the document root. Because
* paths need to be normalized for this to work, use "//" to substitute
* the doc root in the link paths (the array keys). E.g.:
* <code>
* array('//symlink' => '/real/target/path') // unix
* array('//static' => 'D:\\staticStorage') // Windows
* </code>
*
* @return string
*/
public static function rewrite($css, $options)
{
self::$_prependPath = null;
if (!isset($options['prependRelativePath']) && !isset($options['currentDir'])) {
return $css;
}
self::$_browserCacheId = isset($options['browserCacheId']) ? $options['browserCacheId'] : 0;
self::$_browserCacheExtensions = isset($options['browserCacheExtensions']) ? $options['browserCacheExtensions'] : array();
if (isset($options['currentDir'])) {
$document_root = isset($options['docRoot']) ? $options['docRoot'] : $_SERVER['DOCUMENT_ROOT'];
$symlinks = isset($options['symlinks']) ? $options['symlinks'] : array();
$prependAbsolutePath = isset($options['prependAbsolutePath']) ? $options['prependAbsolutePath'] : '';
$prependAbsolutePathCallback = isset($options['prependAbsolutePathCallback']) ? $options['prependAbsolutePathCallback'] : '';
$css = self::_rewrite($css, $options['currentDir'], $prependAbsolutePath, $prependAbsolutePathCallback, $document_root, $symlinks);
} elseif (isset($options['prependRelativePath'])) {
$css = self::prepend($css, $options['prependRelativePath']);
}
return $css;
}
/**
* Prepend a path to relative URIs in CSS files
*
* @param string $css
* @param string $path The path to prepend.
* @param integer $browserCacheId
* @param array $browserCacheExtensions
*
* @return string
*/
private static function _prepend($css, $path, $browserCacheId = 0, $browserCacheExtensions = array())
{
self::$_prependRelativePath = $path;
self::$_browserCacheId = $browserCacheId;
self::$_browserCacheExtensions = $browserCacheExtensions;
$css = self::_trimUrls($css);
// append
$css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/', array(self::$className, '_processUriCB'), $css);
$css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/', array(self::$className, '_processUriCB'), $css);
return $css;
}
