Lady’s Gitweb - Gitweb/blob - static/js/adjust-timezone.js

   1 // Copyright (C) 2011, John 'Warthog9' Hawley <warthog9@eaglescrag.net>
   2 //               2011, Jakub Narebski <jnareb@gmail.com>
   3
   4 /**
   5  * @fileOverview Manipulate dates in gitweb output, adjusting timezone
   6  * @license GPLv2 or later
   7  */
   8
   9 /**
  10  * Get common timezone and adjust dates to use this common timezone.
  11  *
  12  * This function is called during onload event (added to window.onload).
  13  *
  14  * @param {String} tzDefault: default timezone, if there is no cookie
  15  * @param {String} tzCookieName: name of cookie to store timezone
  16  * @param {String} tzClassName: denotes elements with date to be adjusted
  17  */
  18 function onloadTZSetup(tzDefault, tzCookieName, tzClassName) {
  19         var tzCookie = getCookie(tzCookieName);
  20         var tz = tzCookie ? tzCookie : tzDefault;
  21
  22         // server-side of gitweb produces datetime in UTC,
  23         // so if tz is 'utc' there is no need for changes
  24         if (tz !== 'utc') {
  25                 fixDatetimeTZ(tz, tzClassName);
  26         }
  27 }
  28
  29
  30 /**
  31  * Replace RFC-2822 dates contained in SPAN elements with tzClassName
  32  * CSS class with equivalent dates in given timezone.
  33  *
  34  * @param {String} tz: numeric timezone in '(-|+)HHMM' format, or 'utc', or 'local'
  35  * @param {String} tzClassName: specifies elements to be changed
  36  */
  37 function fixDatetimeTZ(tz, tzClassName) {
  38         // sanity check, method should be ensured by common-lib.js
  39         if (!document.getElementsByClassName) {
  40                 return;
  41         }
  42
  43         // translate to timezone in '(-|+)HHMM' format
  44         tz = normalizeTimezoneInfo(tz);
  45
  46         // NOTE: result of getElementsByClassName should probably be cached
  47         var classesFound = document.getElementsByClassName(tzClassName, "span");
  48         for (var i = 0, len = classesFound.length; i < len; i++) {
  49                 var curElement = classesFound[i];
  50
  51                 // we use *.firstChild.data (W3C DOM) instead of *.innerHTML
  52                 // as the latter doesn't always work everywhere in every browser
  53                 var epoch = parseRFC2822Date(curElement.firstChild.data);
  54                 var adjusted = formatDateRFC2882(epoch, tz);
  55
  56                 curElement.firstChild.data = adjusted;
  57         }
  58 }
  59
  60 /* end of adjust-timezone.js */