MDL-36900 repository: File Manager new folder UI improvements

lib/javascript-static.js

@@ -1236,6 +1236,41 @@ function getElementsByClassName(oElm, strTagName, name) {
     return (arrReturnElements)
 }
 
+/**
+ * Increment a file name.
+ *
+ * @param string file name.
+ * @param boolean ignoreextension do not extract the extension prior to appending the
+ *                                suffix. Useful when incrementing folder names.
+ * @return string the incremented file name.
+ */
+function increment_filename(filename, ignoreextension) {
+    var extension = '';
+    var basename = filename;
+
+    // Split the file name into the basename + extension.
+    if (!ignoreextension) {
+        var dotpos = filename.lastIndexOf('.');
+        if (dotpos !== -1) {
+            basename = filename.substr(0, dotpos);
+            extension = filename.substr(dotpos, filename.length);
+        }
+    }
+
+    // Look to see if the name already has (NN) at the end of it.
+    var number = 0;
+    var hasnumber = basename.match(/^(.*) \((\d+)\)$/);
+    if (hasnumber !== null) {
+        // Note the current number & remove it from the basename.
+        number = parseInt(hasnumber[2], 10);
+        basename = hasnumber[1];
+    }
+
+    number++;
+    var newname = basename + ' (' + number + ')' + extension;
+    return newname;
+}
+
 /**
  * Return whether we are in right to left mode or not.
  *