gitweb.js: Provide default values for padding in padLeftStr and padLeft

This means that one can use padLeft(4, 2) and it would be equivalent
to runing padLeft(4, 2, '0'), and it would return '04' i.e. '4' padded
with '0' to width 2, to be used e.g. in formatting date and time.

This should make those functions easier to use.  Current code doesn't
yet make use of this feature.

Signed-off-by: Jakub Narebski <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: jnareb

gitweb/static/js/lib/common-lib.js

@@ -22,11 +22,14 @@
  *
  * @param {Number|String} input: number to pad
  * @param {Number} width: visible width of output
- * @param {String} str: string to prefix to string, e.g. '\u00A0'
+ * @param {String} str: string to prefix to string, defaults to '\u00A0'
  * @returns {String} INPUT prefixed with STR x (WIDTH - INPUT.length)
  */
 function padLeftStr(input, width, str) {
 	var prefix = '';
+	if (typeof str === 'undefined') {
+		ch = '\u00A0'; // using ' ' doesn't work in all browsers
+	}
 
 	width -= input.toString().length;
 	while (width > 0) {
@@ -38,16 +41,21 @@ function padLeftStr(input, width, str) {
 
 /**
  * Pad INPUT on the left to WIDTH, using given padding character CH,
- * for example padLeft('a', 3, '_') is '__a'.
+ * for example padLeft('a', 3, '_') is '__a'
+ *             padLeft(4, 2) is '04' (same as padLeft(4, 2, '0'))
  *
  * @param {String} input: input value converted to string.
  * @param {Number} width: desired length of output.
- * @param {String} ch: single character to prefix to string.
+ * @param {String} ch: single character to prefix to string, defaults to '0'.
  *
  * @returns {String} Modified string, at least SIZE length.
  */
 function padLeft(input, width, ch) {
 	var s = input + "";
+	if (typeof ch === 'undefined') {
+		ch = '0';
+	}
+
 	while (s.length < width) {
 		s = ch + s;
 	}