Function rebuildMonth

codebase/sources/dhtmlxscheduler.js:17442–17480

(year, month, yearlen, mrange, wdaymask, options)

    return { mmask: M366MASK, mdaymask: MDAY366MASK, nmdaymask: NMDAY366MASK, wdaymask: WDAYMASK.slice(wday), mrange: M366RANGE };
  }
  function rebuildMonth(year, month, yearlen, mrange, wdaymask, options) {
    var result = { lastyear: year, lastmonth: month, nwdaymask: [] };
    var ranges = [];
    if (options.freq === RRule.YEARLY) {
      if (empty(options.bymonth)) {
        ranges = [[0, yearlen]];
      } else {
        for (var j = 0; j < options.bymonth.length; j++) {
          month = options.bymonth[j];
          ranges.push(mrange.slice(month - 1, month + 1));
        }
      }
    } else if (options.freq === RRule.MONTHLY) {
      ranges = [mrange.slice(month - 1, month + 1)];
    }
    if (empty(ranges)) {
      return result;
    }
    result.nwdaymask = repeat(0, yearlen);
    for (var j = 0; j < ranges.length; j++) {
      var rang = ranges[j];
      var first = rang[0];
      var last = rang[1] - 1;
      for (var k = 0; k < options.bynweekday.length; k++) {
        var i = void 0;
        var _a = options.bynweekday[k], wday = _a[0], n = _a[1];
        if (n < 0) {
          i = last + (n + 1) * 7;
          i -= pymod(wdaymask[i] - wday, 7);
        } else {
          i = first + (n - 1) * 7;
          i += pymod(7 - wdaymask[i] + wday, 7);
        }
        if (first <= i && i <= last)
          result.nwdaymask[i] = 1;
      }
    }
    return result;
  }
  function easter(y, offset) {
    if (offset === void 0) {
      offset = 0;