G+.FormatDate.user.js

// ==UserScript==
// @name G+ FormatDate
// @author suVene
// @version 0.1.0
// @namespace https://gist.github.com/raw/1115074/3a9327ed58907df0db1b755361875fedac87e682/G+.FormatDate.user.js
// @description formate date for post date
// @include https://plus.google.com/*
// @match https://plus.google.com/*
// ==/UserScript==

(function() {
  // User Options start//{{{
  // User Options end//}}}

  // utilities start//{{{
  function hasClass(elem, clazz) {
    if (/ /.test(clazz)) {
      if (elem.className == clazz) return true;
    } else {
      if (elem.className) {
        if (elem.className == clazz) return true;
        var zz = elem.className.split(/\s+/g);
        for (var m = 0; m < zz.length; m++) {
          if (zz[m] == clazz) return true;
        }
      }
    }
    return false;
  }

  function getElementsByTagAndClassName(tag, clazz, node) {
    var retval = [];
    var elems = (node || document).getElementsByTagName(tag);
    for (var i = 0, I = elems.length; i < I; ++i) {
      var e = elems[i];
      if (hasClass(e, clazz)) {
        retval.push(e);
      }
    }
    return retval;
  }
  // utilities functinos start//}}}

  // private functions start//{{{
  // private functions end//}}}

  // events start//{{{
  function install() {
    var elems = getElementsByTagAndClassName('a', 'a-Ja-h a-b-h-Jb a-f-i-Ad');
    elems = elems.concat(getElementsByTagAndClassName('span', 'a-f-i-Ad'));
    for (var n = 0; n < elems.length; n++) {
      var elem = elems[n];
      if (hasClass('setymd')) continue;
      var t = elem.title;
      var m = t.match('([0-9]{4})/([0-9]{2})/([0-9]{2}) ([0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2})(\n.*\(.*?: ([0-9]{4})/([0-9]{2})/([0-9]{2}) ([0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2})\))?');
      if (m) {
        var d = new Date(m[1] + '/' + (m[2]) + '/' + m[3] + ' ' + m[4])
        elem.innerHTML =
            d.getFullYear() + '/' + (d.getMonth()+1) + '/' + d.getDate() + '(' + WEEKS[d.getDay()] + ') '
          + (d.getHours()<10?'0':'') + d.getHours() + ':' + (d.getMinutes()<10?'0':'') + d.getMinutes();
        if (m[5]) {
          d = new Date(m[7] + '/' + (m[8]) + '/' + m[9] + ' ' + m[10])
          elem.innerHTML +=
              ' (編集: '
            + d.getFullYear() + '/' + (d.getMonth()+1) + '/' + d.getDate() + '(' + WEEKS[d.getDay()] + ') '
            + (d.getHours()<10?'0':'') + d.getHours() + ':' + (d.getMinutes()<10?'0':'') + d.getMinutes()
            + ')';
        }
        elem.className += ' setymd';
      }
    }
  }
  // events end//}}}

  const WEEKS = ['日', '月', '火', '水', '木', '金', '土'];
  window.setInterval(install, 1000);

})()
// vim: set fdm=marker sw=2 ts=2 sts=0 et:

fork https://plus.google.com/103381419582435077916/posts/MHTokKru5ck