listCalendar.js

// カレンダー生成 ロジックは以下URLを参考に作成
// http://blog.livedoor.jp/dankogai/archives/50978399.html

var exports = {
  make:function(year, month){
    var months = [31, 28 + leap(year), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
    var dayNames = ['sun','mon','tue','wed','thu','fri','sat'];
    var rows = [];
    for (var day = 1; day <= months[month-1]; day++){
      var dayOfWeek = (new Date(year, month, day, 0, 0, 0)).getDay();
      var row = {
        dayNames:dayNames[dayOfWeek],
        day:day
      };
      rows.push(row);
    }
    return rows;

  }
};

function leap(year){
  return year % 4 ? 0 : year % 100 ? 1 : year % 400 ? 0 : 1;
}

function make_cal_array(year){
  var months = [31, 28 + leap(year), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
  var result = [];
  for (var m = 0; m < 12; m++){
    result[m] = [];
    var dofw1 = (new Date(year, m, 1, 0, 0, 0)).getDay();
    for (var d = 1; d <= months[m]; d++){
      result[m][d + dofw1 - 1] = d;
    }
  }
  return result;
}