+ /**
+ * list available theme names
+ *
+ * @return array list of available theme names
+ */
+
+ static function listAvailable()
+ {
+ $local = self::subdirsOf(self::localRoot());
+ $install = self::subdirsOf(self::installRoot());
+
+ $i = array_search('base', $install);
+
+ unset($install[$i]);
+
+ return array_merge($local, $install);
+ }
+
+ /**
+ * Utility for getting subdirs of a directory
+ *
+ * @param string $dir full path to directory to check
+ *
+ * @return array relative filenames of subdirs, or empty array
+ */
+
+ protected static function subdirsOf($dir)
+ {
+ $subdirs = array();
+
+ if (is_dir($dir)) {
+ if ($dh = opendir($dir)) {
+ while (($filename = readdir($dh)) !== false) {
+ if ($filename != '..' && $filename !== '.' &&
+ is_dir($dir.'/'.$filename)) {
+ $subdirs[] = $filename;
+ }
+ }
+ closedir($dh);
+ }
+ }
+
+ return $subdirs;
+ }
+