/**
 * jQuery Gantt Chart
 *
 * @see http://taitems.github.io/jQuery.Gantt/
 * @license MIT
 */
/*jshint camelcase:true, freeze:true, jquery:true */
;(function($, undefined) {
  'use strict'

  var UTC_DAY_IN_MS = 24 * 60 * 60 * 1000

  var total = 0
  // 计划年份
  var planYear
  // 记录原始top值
  var curItemId = null
  var historyTop = null
  var hiddenBar = []
  var isHidden = true
  // custom selector `:findday` used to match on specified day in ms.
  //
  // The selector is passed a date in ms and elements are added to the
  // selection filter if the element date matches, as determined by the
  // id attribute containing a parsable date in ms.
  // 打开链接方法
  function openProjectUrl(url) {
    if (url) {
      window.oepn(url)
    } else {
      alert(123)
    }
  }

  function findDay(elt, text) {
    var cd = new Date(parseInt(text, 10))
    cd.setHours(0, 0, 0, 0)
    var id = $(elt).attr('id') || ''
    var si = id.indexOf('-') + 1
    var ed = new Date(parseInt(id.substring(si, id.length), 10))
    ed.setHours(0, 0, 0, 0)
    return cd.getTime() === ed.getTime()
  }

  $.expr.pseudos.findday = !$.expr.createPseudo
    ? function(elt, i, match) {
        return findDay(elt, match[3])
      }
    : $.expr.createPseudo(function(text) {
        return function(elt) {
          return findDay(elt, text)
        }
      })

  // custom selector `:findweek` used to match on specified week in ms.
  function findWeek(elt, text) {
    var cd = new Date(parseInt(text, 10))
    var y = cd.getFullYear()
    var w = cd.getWeekOfYear()
    var m = cd.getMonth()
    if (m === 11 && w === 1) {
      y++
    } else if (!m && w > 51) {
      y--
    }
    cd = y + '-' + w
    var id = $(elt).attr('id') || ''
    var si = id.indexOf('-') + 1
    var ed = id.substring(si, id.length)
    return cd === ed
  }
  $.expr.pseudos.findweek = $.expr.createPseudo
    ? $.expr.createPseudo(function(text) {
        return function(elt) {
          return findWeek(elt, text)
        }
      })
    : function(elt, i, match) {
        return findWeek(elt, match[3])
      }

  // custom selector `:findmonth` used to match on specified month in ms.
  function findMonth(elt, text) {
    var cd = new Date(parseInt(text, 10))
    cd = cd.getFullYear() + '-' + cd.getMonth()
    var id = $(elt).attr('id') || ''
    var si = id.indexOf('-') + 1
    var ed = id.substring(si, id.length)
    return cd === ed
  }
  $.expr[':'].findmonth = $.expr.createPseudo
    ? $.expr.createPseudo(function(text) {
        return function(elt) {
          return findMonth(elt, text)
        }
      })
    : function(elt, i, match) {
        return findMonth(elt, match[3])
      }

  // Date prototype helpers
  // ======================

  // `getWeekId` returns a string in the form of 'dh-YYYY-WW', where WW is
  // the week # for the year.
  // It is used to add an id to the week divs
  Date.prototype.getWeekId = function() {
    var y = this.getFullYear()
    var w = this.getWeekOfYear()
    var m = this.getMonth()
    if (m === 11 && w === 1) {
      y++
    } else if (!m && w > 51) {
      y--
    }
    return 'dh-' + y + '-' + w
  }

  // `getRepDate` returns the milliseconds since the epoch for a given date
  // depending on the active scale
  Date.prototype.getRepDate = function(scale) {
    switch (scale) {
      case 'hours':
        return this.getTime()
      case 'weeks':
        return this.getDayForWeek().getTime()
      case 'months':
        return new Date(this.getFullYear(), this.getMonth(), 1).getTime()
      case 'days':
      /* falls through */
      default:
        return this.getTime()
    }
  }

  // `getDayOfYear` returns the day number for the year
  Date.prototype.getDayOfYear = function() {
    var year = this.getFullYear()
    return (Date.UTC(year, this.getMonth(), this.getDate()) - Date.UTC(year, 0, 0)) / UTC_DAY_IN_MS
  }

  // Use ISO week by default
  //TODO: make these options.
  var firstDay = 1 // ISO week starts with Monday (1); use Sunday (0) for, e.g., North America
  var weekOneDate = 4 // ISO week one always contains 4 Jan; use 1 Jan for, e.g., North America

  // `getWeekOfYear` returns the week number for the year
  //TODO: fix bug when firstDay=6/weekOneDate=1 : https://github.com/moment/moment/issues/2115
  Date.prototype.getWeekOfYear = function() {
    var year = this.getFullYear(),
      month = this.getMonth(),
      date = this.getDate(),
      day = this.getDay()
    //var diff = weekOneDate - day + 7 * (day < firstDay ? -1 : 1);
    var diff = weekOneDate - day
    if (day < firstDay) {
      diff -= 7
    }
    if (diff + 7 < weekOneDate - firstDay) {
      diff += 7
    }
    return Math.ceil(new Date(year, month, date + diff).getDayOfYear() / 7)
  }

  // `getDayForWeek` returns the first day of this Date's week
  Date.prototype.getDayForWeek = function() {
    var day = this.getDay()
    var diff = (day < firstDay ? -7 : 0) + firstDay - day
    return new Date(this.getFullYear(), this.getMonth(), this.getDate() + diff)
  }

  // fixes https://github.com/taitems/jQuery.Gantt/issues/62
  function ktkGetNextDate(currentDate, scaleStep) {
    for (var minIncrements = 1; ; minIncrements++) {
      var nextDate = new Date(currentDate)
      nextDate.setHours(currentDate.getHours() + scaleStep * minIncrements)

      if (nextDate.getTime() !== currentDate.getTime()) {
        return nextDate
      }

      // If code reaches here, it's because current didn't really increment (invalid local time) because of daylight-saving adjustments
      // => retry adding 2, 3, 4 hours, and so on (until nextDate > current)
    }
  }

  $.fn.gantt = function(options) {
    planYear = options.planYear
    total = options.source.length
    var scales = ['hours', 'days', 'weeks', 'months']
    //Default settings
    var settings = {
      source: [],
      holidays: [],
      // paging
      itemsPerPage: 7,
      // localisation
      dow: ['7', '1', '2', '3', '4', '5', '6'],
      months: [
        '一月',
        '二月',
        '三月',
        '四月',
        '五月',
        '六月',
        '七月',
        '八月',
        '九月',
        '十月',
        '十一月',
        '十二月',
      ],
      waitText: '加载中...',
      // navigation
      navigate: 'buttons',
      scrollToToday: true,
      // cookie options
      useCookie: false,
      cookieKey: 'jquery.fn.gantt',
      // scale parameters
      scale: 'days',
      maxScale: 'months',
      minScale: 'hours',
      // callbacks
      onItemClick: function(data) {
        return
      },
      onAddClick: function(dt, rowId) {
        return
      },
      onRender: $.noop,
    }

    // read options
    $.extend(settings, options)

    // can't use cookie if don't have `$.cookie`
    settings.useCookie = settings.useCookie && $.isFunction($.cookie)

    // Grid management
    // ===============

    // Core object is responsible for navigation and rendering
    var core = {
      // Return the element whose topmost point lies under the given point
      // Normalizes for old browsers (NOTE: doesn't work when element is outside viewport)
      //TODO: https://github.com/taitems/jQuery.Gantt/issues/137
      elementFromPoint: (function() {
        // IIFE
        // version for normal browsers
        if (document.compatMode === 'CSS1Compat') {
          return function(x, y) {
            x -= window.pageXOffset
            y -= window.pageYOffset
            return document.elementFromPoint(x, y)
          }
        }
        // version for older browsers
        return function(x, y) {
          x -= $(document).scrollLeft()
          y -= $(document).scrollTop()
          return document.elementFromPoint(x, y)
        }
      })(),

      // **Create the chart**
      create: function(element) {
        // Initialize data with a json object or fetch via an xhr
        // request depending on `settings.source`
        if (typeof settings.source !== 'string') {
          element.data = settings.source
          core.init(element)
        } else {
          $.getJSON(settings.source, function(jsData) {
            element.data = jsData
            core.init(element)
          })
        }
      },

      // **Setup the initial view**
      // Here we calculate the number of rows, pages and visible start
      // and end dates once the data are ready
      init: function(element) {
        element.rowsNum = element.data.length
        element.pageCount = Math.ceil(element.rowsNum / settings.itemsPerPage)
        element.rowsOnLastPage =
          element.rowsNum -
          Math.floor(element.rowsNum / settings.itemsPerPage) * settings.itemsPerPage

        // element.dateStart = tools.getMinDate(element)
        // element.dateEnd = tools.getMaxDate(element)
        element.dateStart = new Date(planYear - 1 + '/10/1 00:00:00')
        element.dateEnd = new Date(planYear + 1 + '/3/31 23:59:59')
        /* core.render(element); */
        core.waitToggle(element, function() {
          core.render(element)
        })
      },

      // **Render the grid**
      render: function(element) {
        var content = $('<div class="fn-content"/>')
        var maindiv = $('<div class="main-div-custom"></div>')
        var $leftPanel = core.leftPanel(element)
        maindiv.append($leftPanel)
        var $rightPanel = core.rightPanel(element, $leftPanel)
        var pLeft, hPos

        maindiv.append($rightPanel)
        content.append(core.navigation(element))

        var $dataPanel = $rightPanel.find('.dataPanel')

        element.gantt = $('<div class="fn-gantt" />')
          .append(maindiv)
          .append(content)

        $(element)
          .empty()
          .append(element.gantt)

        element.scrollNavigation.panelMargin = parseInt(
          $dataPanel.css('left').replace('px', ''),
          10
        )
        element.scrollNavigation.panelMaxPos = $dataPanel.width() - $rightPanel.width()

        element.scrollNavigation.canScroll = $dataPanel.width() > $rightPanel.width()

        core.markNow(element)
        core.fillData(element, $dataPanel, $leftPanel)

        // Set a cookie to record current position in the view
        if (settings.useCookie) {
          var sc = $.cookie(settings.cookieKey + 'ScrollPos')
          if (sc) {
            element.hPosition = sc
          }
        }

        // Scroll the grid to today's date
        if (settings.scrollToToday) {
          core.navigateTo(element, 'now')
          core.scrollPanel(element, 0)
          // or, scroll the grid to the left most date in the panel
        } else {
          if (element.hPosition !== 0) {
            if (element.scaleOldWidth) {
              pLeft = $dataPanel.width() - $rightPanel.width()
              hPos = (pLeft * element.hPosition) / element.scaleOldWidth
              element.hPosition = hPos > 0 ? 0 : hPos
              element.scaleOldWidth = null
            }
            $dataPanel.css({ left: element.hPosition })
            element.scrollNavigation.panelMargin = element.hPosition
          }
          core.repositionLabel(element)
        }

        $dataPanel.css({ height: $leftPanel.height() })
        core.waitToggle(element)
        settings.onRender()
      },

      // Create and return the left panel with labels
      leftPanel: function(element) {
        /* Left panel */
        var ganttLeftPanel = $('<div class="leftPanel"/>').append(
          $(
            '<div class="row spacer"><div class="pindex" style="line-height:' +
              tools.getCellSize() * element.headerRows +
              'px">序号</div><div class="pname"  style="line-height:' +
              tools.getCellSize() * element.headerRows +
              'px">项目名称</div><div class="pstatus"  style="line-height:' +
              tools.getCellSize() * element.headerRows +
              'px">项目状态</div></div>'
          ).css('height', tools.getCellSize() * element.headerRows)
        )

        var entries = []
        var k = 1
        $.each(element.data, function(i, entry) {
          if (
            i >= element.pageNum * settings.itemsPerPage &&
            i < element.pageNum * settings.itemsPerPage + settings.itemsPerPage
          ) {
            var dataId = 'id' in entry ? '" data-id="' + entry.id : ''

            entries.push(
              '<div class="row name row' +
                i +
                (entry.desc ? '' : ' fn-wide ' + dataId) +
                '" id="rowheader' +
                i +
                '" data-offset="' +
                (i % settings.itemsPerPage) * tools.getCellSize() +
                '" >' +
                '<span class="indexspan">' +
                (i + 1) +
                '</span><span class="fn-label' +
                (entry.cssClass ? ' ' + entry.cssClass : '') +
                '" title="' +
                (entry.name || '') +
                '">' +
                '<a rel="opener" target="_blank" href="' +
                entry.url +
                '" >' +
                (entry.name || '') +
                '</a>' +
                '</span>' +
                '</div>'
            )

            k++
            if (entry.desc) {
              entries.push(
                '<div class="row desc row' +
                  i +
                  ' " id="RowdId_' +
                  i +
                  dataId +
                  '">' +
                  '<span class="fn-label' +
                  (entry.cssClass ? ' ' + entry.cssClass : '') +
                  '">' +
                  entry.desc +
                  '</span>' +
                  '</div>'
              )
            }
          }
        })
        return ganttLeftPanel.append(entries.join(''))
      },

      // Create and return the data panel element
      dataPanel: function(element, width) {
        var dataPanel = $('<div class="dataPanel" style="width: ' + width + 'px;"/>')

        // Handle mousewheel events for scrolling the data panel
        var wheel =
          'onwheel' in element
            ? 'wheel'
            : document.onmousewheel !== undefined
            ? 'mousewheel'
            : 'DOMMouseScroll'
        $(element).on(wheel, function(e) {
          core.wheelScroll(element, e)
        })

        // Handle click events and dispatch to registered `onAddClick` function
        dataPanel.click(function(e) {
          e.stopPropagation()
          var corrX /* <- never used? */, corrY
          var leftpanel = $(element).find('.fn-gantt .leftPanel')
          var datapanel = $(element).find('.fn-gantt .dataPanel')
          switch (settings.scale) {
            case 'months':
              corrY = tools.getCellSize()
              break
            case 'hours':
              corrY = tools.getCellSize() * 4
              break
            case 'days':
              corrY = tools.getCellSize() * 3
              break
            case 'weeks':
            /* falls through */
            default:
              corrY = tools.getCellSize() * 2
          }

          /* Adjust, so get middle of elm
                    corrY -= Math.floor(tools.getCellSize() / 2);
                    */

          // Find column where click occurred
          var col = core.elementFromPoint(e.pageX, datapanel.offset().top + corrY)
          // Was the label clicked directly?
          if (col.className === 'fn-label') {
            col = $(col.parentNode)
          } else {
            col = $(col)
          }

          var dt = col.data('repdate')
          // Find row where click occurred
          var row = core.elementFromPoint(leftpanel.offset().left + leftpanel.width() - 10, e.pageY)
          // Was the label clicked directly?
          if (row.className.indexOf('fn-label') === 0) {
            row = $(row.parentNode)
          } else {
            row = $(row)
          }
          var rowId = row.data('id')

          // Dispatch user registered function with the DateTime in ms
          // and the id if the clicked object is a row
          settings.onAddClick(dt, rowId)
        })
        return dataPanel
      },

      // Creates and return the right panel containing the year/week/day header
      rightPanel: function(element, leftPanel /* <- never used? */) {
        var range = null
        // Days of the week have a class of one of
        // `sn` (Sunday), `sa` (Saturday), or `wd` (Weekday)
        var dowClass = ['sn', 'wd', 'wd', 'wd', 'wd', 'wd', 'sa']
        //unused: was someone planning to allow styles to stretch to the bottom of the chart?
        //var gridDowClass = [" sn", "", "", "", "", "", " sa"];

        var yearArr = []
        var scaleUnitsThisYear = 0

        var monthArr = []
        var scaleUnitsThisMonth = 0

        var dayArr = []
        var hoursInDay = 0

        var dowArr = []
        var horArr = []

        var today = new Date()
        today.setHours(0, 0, 0, 0)

        // reused variables
        var $row = $('<div class="row header"></div>')
        var i, len
        var year, month, week, day
        var rday, dayClass
        var dataPanel, dataPanelWidth

        // Setup the headings based on the chosen `settings.scale`
        switch (settings.scale) {
          // **Hours**
          case 'hours':
            range = tools.parseTimeRange(element.dateStart, element.dateEnd, element.scaleStep)
            dataPanelWidth = range.length * tools.getCellSize()

            year = range[0].getFullYear()
            month = range[0].getMonth()
            day = range[0]

            for (i = 0, len = range.length; i < len; i++) {
              rday = range[i]

              // Fill years
              var rfy = rday.getFullYear()
              if (rfy !== year) {
                yearArr.push(
                  '<div class="row year" style="width: ' +
                    tools.getCellSize() * scaleUnitsThisYear +
                    'px;"><div class="fn-label">' +
                    year +
                    '</div></div>'
                )

                year = rfy
                scaleUnitsThisYear = 0
              }
              scaleUnitsThisYear++

              // Fill months
              var rm = rday.getMonth()
              if (rm !== month) {
                monthArr.push(
                  '<div class="row month" style="width: ' +
                    tools.getCellSize() * scaleUnitsThisMonth +
                    'px"><div class="fn-label">' +
                    settings.months[month] +
                    '</div></div>'
                )

                month = rm
                scaleUnitsThisMonth = 0
              }
              scaleUnitsThisMonth++

              // Fill days & hours
              var rgetDay = rday.getDay()
              var getDay = day.getDay()
              if (rgetDay !== getDay) {
                dayClass =
                  today - day === 0
                    ? 'today'
                    : tools.isHoliday(day.getTime())
                    ? 'holiday'
                    : dowClass[getDay]

                dayArr.push(
                  '<div class="row date ' +
                    dayClass +
                    '" ' +
                    'style="width: ' +
                    tools.getCellSize() * hoursInDay +
                    'px;">' +
                    '<div class="fn-label">' +
                    day.getDate() +
                    '</div></div>'
                )
                dowArr.push(
                  '<div class="row day ' +
                    dayClass +
                    '" ' +
                    'style="width: ' +
                    tools.getCellSize() * hoursInDay +
                    'px;">' +
                    '<div class="fn-label">' +
                    settings.dow[getDay] +
                    '</div></div>'
                )

                day = rday
                hoursInDay = 0
              }
              hoursInDay++

              dayClass = dowClass[rgetDay]
              if (tools.isHoliday(rday)) {
                dayClass = 'holiday'
              }
              horArr.push(
                '<div class="row day ' +
                  dayClass +
                  '" id="dh-' +
                  rday.getTime() +
                  '" data-offset="' +
                  i * tools.getCellSize() +
                  '" data-repdate="' +
                  rday.getRepDate(settings.scale) +
                  '"><div class="fn-label">' +
                  rday.getHours() +
                  '</div></div>'
              )
            }

            // Last year
            yearArr.push(
              '<div class="row year" style="width: ' +
                tools.getCellSize() * scaleUnitsThisYear +
                'px;"><div class="fn-label">' +
                year +
                '</div></div>'
            )

            // Last month
            monthArr.push(
              '<div class="row month" style="width: ' +
                tools.getCellSize() * scaleUnitsThisMonth +
                'px"><div class="fn-label">' +
                settings.months[month] +
                '</div></div>'
            )

            dayClass = dowClass[day.getDay()]

            if (tools.isHoliday(day)) {
              dayClass = 'holiday'
            }

            dayArr.push(
              '<div class="row date ' +
                dayClass +
                '" ' +
                'style="width: ' +
                tools.getCellSize() * hoursInDay +
                'px;">' +
                '<div class="fn-label">' +
                day.getDate() +
                '</div></div>'
            )

            dowArr.push(
              '<div class="row day ' +
                dayClass +
                '" ' +
                'style="width: ' +
                tools.getCellSize() * hoursInDay +
                'px;">' +
                '<div class="fn-label">' +
                settings.dow[day.getDay()] +
                '</div></div>'
            )

            dataPanel = core.dataPanel(element, dataPanelWidth)

            // Append panel elements
            dataPanel.append(
              $row.clone().html(yearArr.join('')),
              $row.clone().html(monthArr.join('')),
              $row.clone().html(dayArr.join('')),
              $row.clone().html(dowArr.join('')),
              $row.clone().html(horArr.join(''))
            )
            break

          // **Weeks**
          case 'weeks':
            range = tools.parseWeeksRange(element.dateStart, element.dateEnd)
            dataPanelWidth = range.length * tools.getCellSize()

            year = range[0].getFullYear()
            month = range[0].getMonth()
            week = range[0].getWeekOfYear()
            var diff

            for (i = 0, len = range.length; i < len; i++) {
              rday = range[i]

              // Fill years
              if (week > (week = rday.getWeekOfYear())) {
                // partial weeks to subtract from year header
                diff = rday.getDate() - 1
                // offset one month (December) if week starts in last year
                diff -= !rday.getMonth() ? 0 : 31
                diff /= 7
                yearArr.push(
                  '<div class="row year" style="width: ' +
                    tools.getCellSize() * (scaleUnitsThisYear - diff) +
                    'px;"><div class="fn-label">' +
                    year +
                    '</div></div>'
                )
                year++
                scaleUnitsThisYear = diff
              }
              scaleUnitsThisYear++

              // Fill months
              if (rday.getMonth() !== month) {
                // partial weeks to subtract from month header
                diff = rday.getDate() - 1
                // offset one week if week starts in last month
                //diff -= (diff <= 6) ? 0 : 7;
                diff /= 7
                monthArr.push(
                  '<div class="row month" style="width:' +
                    tools.getCellSize() * (scaleUnitsThisMonth - diff) +
                    'px;"><div class="fn-label">' +
                    settings.months[month] +
                    '</div></div>'
                )
                month = rday.getMonth()
                scaleUnitsThisMonth = diff
              }
              scaleUnitsThisMonth++

              // Fill weeks
              dayArr.push(
                '<div class="row day wd"' +
                  ' id="' +
                  rday.getWeekId() +
                  '" data-offset="' +
                  i * tools.getCellSize() +
                  '" data-repdate="' +
                  rday.getRepDate(settings.scale) +
                  '">' +
                  '<div class="fn-label">' +
                  week +
                  '</div></div>'
              )
            }

            // Last year
            yearArr.push(
              '<div class="row year" style="width: ' +
                tools.getCellSize() * scaleUnitsThisYear +
                'px;"><div class="fn-label">' +
                year +
                '</div></div>'
            )

            // Last month
            monthArr.push(
              '<div class="row month" style="width: ' +
                tools.getCellSize() * scaleUnitsThisMonth +
                'px"><div class="fn-label">' +
                settings.months[month] +
                '</div></div>'
            )

            dataPanel = core.dataPanel(element, dataPanelWidth)

            // Append panel elements
            dataPanel.append(
              $row.clone().html(yearArr.join('')),
              $row.clone().html(monthArr.join('')),
              $row.clone().html(dayArr.join(''))
            )
            break

          // **Months**
          case 'months':
            range = tools.parseMonthsRange(element.dateStart, element.dateEnd)
            dataPanelWidth = range.length * tools.getCellSize() * 3

            year = range[0].getFullYear()
            month = range[0].getMonth()

            for (i = 0, len = range.length; i < len; i++) {
              rday = range[i]

              // Fill years
              if (rday.getFullYear() !== year) {
                yearArr.push(
                  '<div class="row year" style="width: ' +
                    tools.getCellSize() * 3 * scaleUnitsThisYear +
                    'px;"><div class="fn-label">' +
                    year +
                    '</div></div>'
                )
                year = rday.getFullYear()
                scaleUnitsThisYear = 0
              }
              scaleUnitsThisYear++
              monthArr.push(
                '<div class="row day wd" id="dh-' +
                  tools.genId(rday) +
                  '" data-offset="' +
                  i * tools.getCellSize() +
                  '" data-repdate="' +
                  rday.getRepDate(settings.scale) +
                  '"  style="width:72px">' +
                  (1 + rday.getMonth()) +
                  '</div>'
              )
            }

            // Last year
            yearArr.push(
              '<div class="row year" style="width: ' +
                tools.getCellSize() * 3 * scaleUnitsThisYear +
                'px;"><div class="fn-label">' +
                year +
                '</div></div>'
            )

            dataPanel = core.dataPanel(element, dataPanelWidth)

            // Append panel elements
            dataPanel.append(
              $row.clone().html(yearArr.join('')),
              $row.clone().html(monthArr.join(''))
            )
            break

          // **Days (default)**
          default:
            range = tools.parseDateRange(element.dateStart, element.dateEnd)
            dataPanelWidth = range.length * tools.getCellSize()

            var dateBefore = ktkGetNextDate(range[0], -1)
            year = dateBefore.getFullYear()
            month = dateBefore.getMonth()
            //day = dateBefore; // <- never used?

            for (i = 0, len = range.length; i < len; i++) {
              rday = range[i]

              // Fill years
              if (rday.getFullYear() !== year) {
                yearArr.push(
                  '<div class="row year" style="width:' +
                    tools.getCellSize() * scaleUnitsThisYear +
                    'px;"><div class="fn-label">' +
                    year +
                    '</div></div>'
                )
                year = rday.getFullYear()
                scaleUnitsThisYear = 0
              }
              scaleUnitsThisYear++

              // Fill months
              if (rday.getMonth() !== month) {
                monthArr.push(
                  '<div class="row month" style="width:' +
                    tools.getCellSize() * scaleUnitsThisMonth +
                    'px;"><div class="fn-label">' +
                    settings.months[month] +
                    '</div></div>'
                )
                month = rday.getMonth()
                scaleUnitsThisMonth = 0
              }
              scaleUnitsThisMonth++

              day = rday.getDay()
              dayClass = dowClass[day]
              if (tools.isHoliday(rday)) {
                dayClass = 'holiday'
              }

              dayArr.push(
                '<div class="row date ' +
                  dayClass +
                  '"' +
                  ' id="dh-' +
                  tools.genId(rday) +
                  '" data-offset="' +
                  i * tools.getCellSize() +
                  '" data-repdate="' +
                  rday.getRepDate(settings.scale) +
                  '">' +
                  '<div class="fn-label">' +
                  rday.getDate() +
                  '</div></div>'
              )
              dowArr.push(
                '<div class="row day ' +
                  dayClass +
                  '"' +
                  ' id="dw-' +
                  tools.genId(rday) +
                  '" data-repdate="' +
                  rday.getRepDate(settings.scale) +
                  '">' +
                  '<div class="fn-label">' +
                  settings.dow[day] +
                  '</div></div>'
              )
            } //for

            // Last year
            yearArr.push(
              '<div class="row year" style="width: ' +
                tools.getCellSize() * scaleUnitsThisYear +
                'px;"><div class="fn-label">' +
                year +
                '</div></div>'
            )

            // Last month
            monthArr.push(
              '<div class="row month" style="width: ' +
                (tools.getCellSize() * scaleUnitsThisMonth - 1) +
                'px"><div class="fn-label">' +
                settings.months[month] +
                '</div></div>'
            )

            dataPanel = core.dataPanel(element, dataPanelWidth)

            // Append panel elements
            dataPanel.append(
              $row.clone().html(yearArr.join('')),
              $row.clone().html(monthArr.join('')),
              $row.clone().html(dayArr.join('')),
              $row.clone().html(dowArr.join(''))
            )
        }

        return $('<div class="rightPanel"></div>').append(dataPanel)
      },

      // **Navigation**
      navigation: function(element) {
        var ganttNavigate = null
        // Scrolling navigation is provided by setting
        // `settings.navigate='scroll'`
        if (settings.navigate === 'scroll') {
          ganttNavigate = $('<div class="navigate" />')
            .append(
              $('<div class="nav-slider" />')
                .append(
                  $('<div class="nav-slider-left" />')
                    .append(
                      $('<button type="button" title="上一页" class="nav-link nav-page-back"/>')
                        .html('&uarr;')
                        .click(function() {
                          core.navigatePage(element, -1)
                        })
                    )
                    .append(
                      $('<div class="page-number"/>').append(
                        $('<span/>').html(element.pageNum + 1 + ' / ' + element.pageCount)
                      )
                    )
                    .append(
                      $('<button type="button" title="下一页" class="nav-link nav-page-next"/>')
                        .html('&darr;')
                        .click(function() {
                          core.navigatePage(element, 1)
                        })
                    )
                    .append(
                      $('<button type="button" title="定位到当前时间" class="nav-link nav-now"/>')
                        .html('&#9679;')
                        .click(function() {
                          core.navigateTo(element, 'now')
                        })
                    )
                    .append(
                      $(
                        '<button type="button" title="快速左移查看范围" class="nav-link nav-prev-week"/>'
                      )
                        .html('&lt;&lt;')
                        .click(function() {
                          if (settings.scale === 'hours') {
                            core.navigateTo(element, tools.getCellSize() * 8)
                          } else if (settings.scale === 'days') {
                            core.navigateTo(element, tools.getCellSize() * 30)
                          } else if (settings.scale === 'weeks') {
                            core.navigateTo(element, tools.getCellSize() * 12)
                          } else if (settings.scale === 'months') {
                            core.navigateTo(element, tools.getCellSize() * 6)
                          }
                        })
                    )
                    .append(
                      $(
                        '<button type="button" title="左移查看范围" class="nav-link nav-prev-day"/>'
                      )
                        .html('&lt;')
                        .click(function() {
                          if (settings.scale === 'hours') {
                            core.navigateTo(element, tools.getCellSize() * 4)
                          } else if (settings.scale === 'days') {
                            core.navigateTo(element, tools.getCellSize() * 7)
                          } else if (settings.scale === 'weeks') {
                            core.navigateTo(element, tools.getCellSize() * 4)
                          } else if (settings.scale === 'months') {
                            core.navigateTo(element, tools.getCellSize() * 3)
                          }
                        })
                    )
                )
                .append(
                  $('<div class="nav-slider-content" />').append(
                    $('<div class="nav-slider-bar" />')
                      .append($('<a class="nav-slider-button" title="拖动切换查看范围"/>'))
                      .mousedown(function(e) {
                        e.preventDefault()
                        element.scrollNavigation.scrollerMouseDown = true
                        core.sliderScroll(element, e)
                      })
                      .mousemove(function(e) {
                        if (element.scrollNavigation.scrollerMouseDown) {
                          core.sliderScroll(element, e)
                        }
                      })
                  )
                )
                .append(
                  $('<div class="nav-slider-right" />')
                    .append(
                      $(
                        '<button type="button" title="右移查看范围" class="nav-link nav-next-day"/>'
                      )
                        .html('&gt;')
                        .click(function() {
                          if (settings.scale === 'hours') {
                            core.navigateTo(element, tools.getCellSize() * -4)
                          } else if (settings.scale === 'days') {
                            core.navigateTo(element, tools.getCellSize() * -7)
                          } else if (settings.scale === 'weeks') {
                            core.navigateTo(element, tools.getCellSize() * -4)
                          } else if (settings.scale === 'months') {
                            core.navigateTo(element, tools.getCellSize() * -3)
                          }
                        })
                    )
                    .append(
                      $(
                        '<button type="button" title="快速右移查看范围" class="nav-link nav-next-week"/>'
                      )
                        .html('&gt;&gt;')
                        .click(function() {
                          if (settings.scale === 'hours') {
                            core.navigateTo(element, tools.getCellSize() * -8)
                          } else if (settings.scale === 'days') {
                            core.navigateTo(element, tools.getCellSize() * -30)
                          } else if (settings.scale === 'weeks') {
                            core.navigateTo(element, tools.getCellSize() * -12)
                          } else if (settings.scale === 'months') {
                            core.navigateTo(element, tools.getCellSize() * -6)
                          }
                        })
                    )
                    .append(
                      $('<button type="button" class="nav-link nav-zoomIn"/>')
                        .html('&#43;')
                        .click(function() {
                          core.zoomInOut(element, -1)
                        })
                    )
                    .append(
                      $('<button type="button" class="nav-link nav-zoomOut"/>')
                        .html('&#45;')
                        .click(function() {
                          core.zoomInOut(element, 1)
                        })
                    )
                )
            )
            .append(
              $('<div style="display: inline-block;margin-left: 20px;"/>').html('共' + total + '条')
            )
          $('#toToday').click(function() {
            core.navigateTo(element, 'now')
          })
          $('#toDays')
            .unbind()
            .click(function() {
              core.zoomInOut(element, 1)
            })
          $('#toWeeks').click(function() {
            core.zoomInOut(element, 2)
          })
          $('#toMonths').click(function() {
            core.zoomInOut(element, 3)
          })

          $('#totalCount').html(element.rowsNum / 2)

          $(document).mouseup(function() {
            element.scrollNavigation.scrollerMouseDown = false
          })
          // Button navigation is provided by setting `settings.navigation='buttons'`
        } else {
          ganttNavigate = $('<div class="navigate" />')
            .append(
              $('<button type="button" class="nav-link nav-page-back"/>')
                .html('&uarr;')
                .click(function() {
                  core.navigatePage(element, -1)
                })
            )
            .append(
              $('<div class="page-number"/>').append(
                $('<span/>').html(element.pageNum + 1 + ' / ' + element.pageCount)
              )
            )
            .append(
              $('<button type="button" class="nav-link nav-page-next"/>')
                .html('&darr;')
                .click(function() {
                  core.navigatePage(element, 1)
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-begin"/>')
                .html('&#124;&lt;')
                .click(function() {
                  core.navigateTo(element, 'begin')
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-prev-week"/>')
                .html('&lt;&lt;')
                .click(function() {
                  core.navigateTo(element, tools.getCellSize() * 7)
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-prev-day"/>')
                .html('&lt;')
                .click(function() {
                  core.navigateTo(element, tools.getCellSize())
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-now"/>')
                .html('&#9679;')
                .click(function() {
                  core.navigateTo(element, 'now')
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-next-day"/>')
                .html('&gt;')
                .click(function() {
                  core.navigateTo(element, tools.getCellSize() * -1)
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-next-week"/>')
                .html('&gt;&gt;')
                .click(function() {
                  core.navigateTo(element, tools.getCellSize() * -7)
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-end"/>')
                .html('&gt;&#124;')
                .click(function() {
                  core.navigateTo(element, 'end')
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-zoomIn"/>')
                .html('&#43;')
                .click(function() {
                  core.zoomInOut(element, -1)
                })
            )
            .append(
              $('<button type="button" class="nav-link nav-zoomOut"/>')
                .html('&#45;')
                .click(function() {
                  core.zoomInOut(element, 1)
                })
            )
        }
        return $('<div class="bottom"></div>').append(ganttNavigate)
      },

      // **Progress Bar**
      // Return an element representing a progress of position within the entire chart
      createProgressBar: function(label, desc, classNames, dataObj, itemId) {
        label = label || ''
        var bar = $(
          '<div  id="' + itemId + '" class="bar"><div class="fn-label">' + label + '</div></div>'
        ).data('dataObj', dataObj)
        if (desc) {
          bar
            .mouseenter(function(e) {
              if (itemId !== curItemId) {
                //如过进入的不是当前组合，则直接展示新的
                hiddenBar.map(function(bar, index) {
                  $(bar).css('top', historyTop)
                })
                hiddenBar = []
                historyTop = null
              }
              isHidden = false
              if (classNames != 'ganttRed' && historyTop == null) {
                // 多个bar重叠时，将重叠的展示出来
                var barList = document.querySelectorAll(
                  "[id='" +
                    itemId +
                    "'].ganttOne,[id='" +
                    itemId +
                    "'].ganttTwo,[id='" +
                    itemId +
                    "'].ganttThree"
                )
                var curBar = document.querySelector("[id='" + itemId + "']." + classNames)
                barList.forEach(function(bar) {
                  if (
                    $(bar).css('left') == $(curBar).css('left') &&
                    $(bar)
                      .prop('className')
                      .indexOf(classNames) == -1
                  ) {
                    hiddenBar.push(bar)
                  }
                })
                if (hiddenBar.length > 0) {
                  curItemId = itemId
                  historyTop = $(hiddenBar[0]).css('top')
                  hiddenBar.map(function(bar, index) {
                    $(bar).css(
                      'top',
                      parseFloat(historyTop.replace('px', '')) - (hiddenBar.length - index) * 15
                    )
                  })
                }
              }

              var hint = $('<div class="fn-gantt-hint" />').html(desc)
              $('body').append(hint)
              hint.css('left', e.pageX)
              hint.css('top', e.pageY - 300)
              hint.show()
            })
            .mouseleave(function() {
              isHidden = true
              setTimeout(function() {
                if (isHidden) {
                  hiddenBar.map(function(bar, index) {
                    $(bar).css('top', historyTop)
                  })
                  hiddenBar = []
                  historyTop = null
                }
              }, 2000)
              $('.fn-gantt-hint').remove()
            })
            .mousemove(function(e) {
              $('.fn-gantt-hint').css('left', e.pageX)
              $('.fn-gantt-hint').css('top', e.pageY + 15)
            })
        }
        if (classNames) {
          bar.addClass(classNames)
        }
        bar.click(function(e) {
          e.stopPropagation()
          settings.onItemClick($(this).data('dataObj'))
        })
        return bar
      },

      // Remove the `wd` (weekday) class and add `today` class to the
      // current day/week/month (depending on the current scale)
      markNow: function(element) {
        var cd = new Date().setHours(0, 0, 0, 0)
        switch (settings.scale) {
          case 'weeks':
            $(element)
              .find(':findweek("' + cd + '")')
              .removeClass('wd')
              .addClass('today')
            break
          case 'months':
            $(element)
              .find(':findmonth("' + cd + '")')
              .removeClass('wd')
              .addClass('today')
            break
          case 'days':
          /* falls through */
          case 'hours':
          /* falls through */
          default:
            $(element)
              .find(':findday("' + cd + '")')
              .removeClass('wd')
              .addClass('today')
        }
      },

      // **Fill the Chart**
      // Parse the data and fill the data panel
      fillData: function(element, datapanel, leftpanel /* <- never used? */) {
        var cellWidth = tools.getCellSize()
        var barOffset = (cellWidth - 18) / 2
        var dataPanelWidth = datapanel.width()
        var invertColor = function(colStr) {
          try {
            colStr = colStr.replace('rgb(', '').replace(')', '')
            var rgbArr = colStr.split(',')
            var R = parseInt(rgbArr[0], 10)
            var G = parseInt(rgbArr[1], 10)
            var B = parseInt(rgbArr[2], 10)
            var gray = Math.round((255 - (0.299 * R + 0.587 * G + 0.114 * B)) * 0.9)
            return 'rgb(' + gray + ', ' + gray + ', ' + gray + ')'
          } catch (err) {
            return ''
          }
        }
        // Loop through the values of each data element and set a row
        var indexNum = 0
        $.each(element.data, function(i, entry) {
          if (
            i >= element.pageNum * settings.itemsPerPage &&
            i < element.pageNum * settings.itemsPerPage + settings.itemsPerPage
          ) {
            $.each(entry.values, function(j, day) {
              var _bar
              var from, to, cFrom, cTo, dFrom, dTo, dl, dp
              var topEl, top
              switch (settings.scale) {
                // **Hourly data**
                case 'hours':
                  dFrom = tools.genId(tools.dateDeserialize(day.from), element.scaleStep)
                  from = $(element).find('#dh-' + dFrom)
                  dTo = tools.genId(tools.dateDeserialize(day.to), element.scaleStep)
                  to = $(element).find('#dh-' + dTo)
                  cFrom = from.data('offset')
                  cTo = to.data('offset')
                  dl = Math.floor((cTo - cFrom) / cellWidth) + 1
                  dp = (100 * (cellWidth * dl - 1)) / dataPanelWidth

                  _bar = core.createProgressBar(
                    day.label,
                    day.desc,
                    day.customClass,
                    day.dataObj,
                    day.itemId
                  )

                  // find row
                  topEl = $(element).find('#rowheader' + i)
                  top = cellWidth * 5 + barOffset + topEl.data('offset')
                  _bar.css({
                    top: top,
                    left: Math.floor(cFrom),
                    width: dp + '%',
                    display: !cFrom && !cTo ? 'none' : '',
                  })

                  datapanel.append(_bar)
                  break

                // **Weekly data**
                case 'weeks':
                  dFrom = tools.dateDeserialize(day.from)
                  dTo = tools.dateDeserialize(day.to)

                  from = $(element).find('#' + dFrom.getWeekId())
                  cFrom = from.data('offset')
                  to = $(element).find('#' + dTo.getWeekId())
                  cTo = to.data('offset')
                  dl = Math.round((cTo - cFrom) / cellWidth) + 1
                  dp = (100 * (cellWidth * dl - 1)) / dataPanelWidth
                  // 如果没有开始或者结束，则不显示
                  if (!cTo | !cFrom) dp = 0
                  if (dp < 0) dp = 100
                  _bar = core.createProgressBar(
                    day.label,
                    day.desc,
                    day.customClass,
                    day.dataObj,
                    day.itemId
                  )

                  // find row
                  topEl = $(element).find('#rowheader' + i)
                  top = cellWidth * (3 + j) + barOffset + topEl.data('offset') + indexNum * 24

                  _bar.css({
                    top: top,
                    left: Math.floor(cFrom),
                    width: dp + '%',
                    display: !cFrom && !cTo ? 'none' : '',
                  })

                  datapanel.append(_bar)
                  break

                // **Monthly data**
                case 'months':
                  dFrom = tools.dateDeserialize(day.from)
                  dTo = tools.dateDeserialize(day.to)

                  if (dFrom.getDate() <= 3 && dFrom.getMonth() === 0) {
                    dFrom.setDate(dFrom.getDate() + 4)
                  }

                  if (dFrom.getDate() <= 3 && dFrom.getMonth() === 0) {
                    dFrom.setDate(dFrom.getDate() + 4)
                  }

                  if (dTo.getDate() <= 3 && dTo.getMonth() === 0) {
                    dTo.setDate(dTo.getDate() + 4)
                  }

                  from = $(element).find('#dh-' + tools.genId(dFrom))
                  cFrom = from.data('offset')
                  to = $(element).find('#dh-' + tools.genId(dTo))
                  cTo = to.data('offset')
                  dl = Math.round((cTo - cFrom) / cellWidth) + 1
                  dp = (100 * (cellWidth * dl - 1)) / dataPanelWidth
                  // 如果没有开始或者结束，则不显示
                  if (!cTo | !cFrom) dp = 0
                  if (dp < 0) dp = 100
                  _bar = core.createProgressBar(
                    day.label,
                    day.desc,
                    day.customClass,
                    day.dataObj,
                    day.itemId
                  )

                  // find row
                  topEl = $(element).find('#rowheader' + i)

                  top = cellWidth * (2 + j) + barOffset + topEl.data('offset') + indexNum * 24

                  _bar.css({
                    top: top,
                    left: Math.floor(cFrom) * 3,
                    width: dp * 3 + '%',
                    display: !cFrom && !cTo ? 'none' : '',
                  })

                  datapanel.append(_bar)
                  break

                // **Days**
                case 'days':
                /* falls through */
                default:
                  dFrom = tools.genId(tools.dateDeserialize(day.from))
                  dTo = tools.genId(tools.dateDeserialize(day.to))
                  from = $(element).find('#dh-' + dFrom)
                  cFrom = from.data('offset')
                  dl = Math.floor((dTo - dFrom) / UTC_DAY_IN_MS) + 1
                  dp = (100 * (cellWidth * dl - 1)) / dataPanelWidth

                  _bar = core.createProgressBar(
                    day.label,
                    day.desc,
                    day.customClass,
                    day.dataObj,
                    day.itemId
                  )

                  // find row
                  topEl = $(element).find('#rowheader' + i)

                  top = cellWidth * (4 + j) + barOffset + topEl.data('offset') + indexNum * 24
                  _bar.css({
                    top: top,
                    left: Math.floor(cFrom),
                    width: dp + '%',
                    display: !cFrom && !cTo ? 'none' : '',
                  })

                  datapanel.append(_bar)
              }

              var $l = _bar.find('.fn-label')
              if ($l.length) {
                var gray = invertColor(_bar.css('backgroundColor'))
                $l.css('color', gray)
              }
              // if (j === 0) {
              //   indexNum++
              // }
            })
            indexNum++
          }
        })
      },
      // **Navigation**
      navigateTo: function(element, val) {
        var $rightPanel = $(element).find('.fn-gantt .rightPanel')
        var $dataPanel = $rightPanel.find('.dataPanel')
        var rightPanelWidth = $rightPanel.width()
        var dataPanelWidth = $dataPanel.width()
        var shift = function() {
          core.repositionLabel(element)
        }
        var maxLeft, curLeft
        switch (val) {
          case 'begin':
            $dataPanel.animate({ left: '0' }, 'fast', shift)
            element.scrollNavigation.panelMargin = 0
            break
          case 'end':
            var pLeft = dataPanelWidth - rightPanelWidth
            element.scrollNavigation.panelMargin = pLeft * -1
            $dataPanel.animate({ left: '-' + pLeft }, 'fast', shift)
            break
          case 'now':
            if (!element.scrollNavigation.canScroll || !$dataPanel.find('.today').length) {
              return false
            }
            maxLeft = (dataPanelWidth - rightPanelWidth) * -1
            curLeft = $dataPanel.css('left').replace('px', '')
            val = $dataPanel.find('.today').offset().left - $dataPanel.offset().left
            val *= -1
            if (val > 0) {
              val = 0
            } else if (val < maxLeft) {
              val = maxLeft
            }
            $dataPanel.animate({ left: val }, 'fast', shift)
            element.scrollNavigation.panelMargin = val
            break
          default:
            maxLeft = (dataPanelWidth - rightPanelWidth) * -1
            curLeft = $dataPanel.css('left').replace('px', '')
            val = parseInt(curLeft, 10) + val
            if (val <= 0 && val >= maxLeft) {
              $dataPanel.animate({ left: val }, 'fast', shift)
            }
            element.scrollNavigation.panelMargin = val
        }
        core.synchronizeScroller(element)
      },

      // Navigate to a specific page
      navigatePage: function(element, val) {
        if (
          element.pageNum + val >= 0 &&
          element.pageNum + val < Math.ceil(element.rowsNum / settings.itemsPerPage)
        ) {
          core.waitToggle(element, function() {
            element.pageNum += val
            element.hPosition = $('.fn-gantt .dataPanel')
              .css('left')
              .replace('px', '')
            element.scaleOldWidth = false
            core.init(element)
          })
        }
      },

      // Change zoom level
      zoomInOut: function(element, val) {
        core.waitToggle(element, function() {
          var scale = settings.scale
          var headerRows = element.headerRows
          var scaleSt = element.scaleStep
          if (val == 1) {
            scale = 'days'
            headerRows = 4
            scaleSt = 13
          }
          if (val == 2) {
            scale = 'weeks'
            headerRows = 3
            scaleSt = 13
          }
          if (val == 3) {
            scale = 'months'
            headerRows = 2
            scaleSt = 14
          }

          /* var zoomIn = (val < 0);
                    var scaleSt = element.scaleStep + val * 3;
                    scaleSt = scaleSt <= 1 ? 1 : scaleSt === 4 ? 3 : scaleSt;
                    var scale = settings.scale;
                    var headerRows = element.headerRows;
                    if (settings.scale === "hours" && scaleSt >= 13) {
                        scale = "days";
                        headerRows = 4;
                        scaleSt = 13;
                    } else if (settings.scale === "days" && zoomIn) {
                        scale = "hours";
                        headerRows = 5;
                        scaleSt = 12;
                    } else if (settings.scale === "days" && !zoomIn) {
                        scale = "weeks";
                        headerRows = 3;
                        scaleSt = 13;
                    } else if (settings.scale === "weeks" && !zoomIn) {
                        scale = "months";
                        headerRows = 2;
                        scaleSt = 14;
                    } else if (settings.scale === "weeks" && zoomIn) {
                        scale = "days";
                        headerRows = 4;
                        scaleSt = 13;
                    } else if (settings.scale === "months" && zoomIn) {
                        scale = "weeks";
                        headerRows = 3;
                        scaleSt = 13;
                    }

                    // do nothing if attempting to zoom past max/min
                    if ((zoomIn && $.inArray(scale, scales) < $.inArray(settings.minScale, scales)) ||
                        (!zoomIn && $.inArray(scale, scales) > $.inArray(settings.maxScale, scales))) {
                        core.init(element);
                        return;
                    }*/

          element.scaleStep = scaleSt
          settings.scale = scale
          element.headerRows = headerRows
          var $rightPanel = $(element).find('.fn-gantt .rightPanel')
          var $dataPanel = $rightPanel.find('.dataPanel')
          element.hPosition = $dataPanel.css('left').replace('px', '')
          element.scaleOldWidth = $dataPanel.width() - $rightPanel.width()

          if (settings.useCookie) {
            $.cookie(settings.cookieKey + 'CurrentScale', settings.scale)
            // reset scrollPos
            $.cookie(settings.cookieKey + 'ScrollPos', null)
          }
          core.init(element)
        })
      },

      // Move chart via mouseclick
      mouseScroll: function(element, e) {
        var $dataPanel = $(element).find('.fn-gantt .dataPanel')
        $dataPanel.css('cursor', 'move')
        var bPos = $dataPanel.offset()
        var mPos =
          element.scrollNavigation.mouseX === null ? e.pageX : element.scrollNavigation.mouseX
        var delta = e.pageX - mPos
        element.scrollNavigation.mouseX = e.pageX

        core.scrollPanel(element, delta)

        clearTimeout(element.scrollNavigation.repositionDelay)
        element.scrollNavigation.repositionDelay = setTimeout(core.repositionLabel, 50, element)
      },

      // Move chart via mousewheel
      wheelScroll: function(element, e) {
        e.preventDefault() // e is a jQuery Event

        // attempts to normalize scroll wheel velocity
        var delta =
          'detail' in e
            ? e.detail
            : 'wheelDelta' in e.originalEvent
            ? (-1 / 120) * e.originalEvent.wheelDelta
            : e.originalEvent.deltaY
            ? e.originalEvent.deltaY / Math.abs(e.originalEvent.deltaY)
            : e.originalEvent.detail

        // simpler normalization, ignoring per-device/browser/platform acceleration & semantic variations
        //var delta = e.detail || - (e = e.originalEvent).wheelData || e.deltaY /* || e.deltaX */ || e.detail;
        //delta = ( delta / Math.abs(delta) ) || 0;

        core.scrollPanel(element, -50 * delta)

        clearTimeout(element.scrollNavigation.repositionDelay)
        element.scrollNavigation.repositionDelay = setTimeout(core.repositionLabel, 50, element)
      },

      // Move chart via slider control
      sliderScroll: function(element, e) {
        var $sliderBar = $(element).find('.nav-slider-bar')
        var $sliderBarBtn = $sliderBar.find('.nav-slider-button')
        var $rightPanel = $(element).find('.fn-gantt .rightPanel')
        var $dataPanel = $rightPanel.find('.dataPanel')

        var bPos = $sliderBar.offset()
        var bWidth = $sliderBar.width()
        var wButton = $sliderBarBtn.width()

        var pos, pLeft

        if (e.pageX >= bPos.left && e.pageX <= bPos.left + bWidth) {
          pos = e.pageX - bPos.left
          pos = pos - wButton / 2
          $sliderBarBtn.css('left', pos)

          pLeft = $dataPanel.width() - $rightPanel.width()

          var pPos = ((pos * pLeft) / bWidth) * -1
          if (pPos >= 0) {
            $dataPanel.css('left', '0')
            element.scrollNavigation.panelMargin = 0
          } else if (pos >= bWidth - wButton * 1) {
            $dataPanel.css('left', pLeft * -1)
            element.scrollNavigation.panelMargin = pLeft * -1
          } else {
            $dataPanel.css('left', pPos)
            element.scrollNavigation.panelMargin = pPos
          }
          clearTimeout(element.scrollNavigation.repositionDelay)
          element.scrollNavigation.repositionDelay = setTimeout(core.repositionLabel, 5, element)
        }
      },

      // Update scroll panel margins
      scrollPanel: function(element, delta) {
        if (!element.scrollNavigation.canScroll) {
          return false
        }
        var _panelMargin = parseInt(element.scrollNavigation.panelMargin, 10) + delta
        if (_panelMargin > 0) {
          element.scrollNavigation.panelMargin = 0
          $(element)
            .find('.fn-gantt .dataPanel')
            .css('left', element.scrollNavigation.panelMargin)
        } else if (_panelMargin < element.scrollNavigation.panelMaxPos * -1) {
          element.scrollNavigation.panelMargin = element.scrollNavigation.panelMaxPos * -1
          $(element)
            .find('.fn-gantt .dataPanel')
            .css('left', element.scrollNavigation.panelMargin)
        } else {
          element.scrollNavigation.panelMargin = _panelMargin
          $(element)
            .find('.fn-gantt .dataPanel')
            .css('left', element.scrollNavigation.panelMargin)
        }
        core.synchronizeScroller(element)
      },

      // Synchronize scroller
      synchronizeScroller: function(element) {
        if (settings.navigate !== 'scroll') {
          return
        }
        var $rightPanel = $(element).find('.fn-gantt .rightPanel')
        var $dataPanel = $rightPanel.find('.dataPanel')
        var $sliderBar = $(element).find('.nav-slider-bar')
        var $sliderBtn = $sliderBar.find('.nav-slider-button')

        var bWidth = $sliderBar.width()
        var wButton = $sliderBtn.width()

        var pLeft = $dataPanel.width() - $rightPanel.width()
        var hPos = $dataPanel.css('left') || 0
        if (hPos) {
          hPos = hPos.replace('px', '')
        }
        var pos = (hPos * bWidth) / pLeft - $sliderBtn.width() * 0.25
        pos =
          pos > 0 ? 0 : pos * -1 >= bWidth - wButton * 0.75 ? (bWidth - wButton * 1.25) * -1 : pos
        $sliderBtn.css('left', pos * -1)
      },

      // Reposition data labels
      repositionLabel: function(element) {
        setTimeout(function() {
          var $dataPanel
          if (!element) {
            $dataPanel = $('.fn-gantt .rightPanel .dataPanel')
          } else {
            var $rightPanel = $(element).find('.fn-gantt .rightPanel')
            $dataPanel = $rightPanel.find('.dataPanel')
          }

          if (settings.useCookie) {
            $.cookie(settings.cookieKey + 'ScrollPos', $dataPanel.css('left').replace('px', ''))
          }
        }, 500)
      },

      // waitToggle
      waitToggle: function(element, showCallback) {
        if ($.isFunction(showCallback)) {
          var $elt = $(element)
          var eo = $elt.offset()
          var ew = $elt.outerWidth()
          var eh = $elt.outerHeight()

          if (!element.loader) {
            element.loader = $(
              '<div class="fn-gantt-loader">' +
                '<div class="fn-gantt-loader-spinner"><span>' +
                settings.waitText +
                '</span></div></div>'
            )
          }
          $elt.append(element.loader)
          setTimeout(showCallback, 500)
        } else if (element.loader) {
          element.loader.detach()
        }
      },
    }

    // Utility functions
    // =================
    var tools = {
      // Return the maximum available date in data depending on the scale
      getMaxDate: function(element) {
        var maxDate = null
        $.each(element.data, function(i, entry) {
          $.each(entry.values, function(i, date) {
            maxDate =
              maxDate < tools.dateDeserialize(date.to) ? tools.dateDeserialize(date.to) : maxDate
          })
        })
        maxDate = maxDate || new Date()
        var bd
        bd = new Date(maxDate.getTime())
        maxDate = new Date(bd.getFullYear() + 1, 2, 31)
        /*switch (settings.scale) {
                case "hours":
                    maxDate.setHours(Math.ceil((maxDate.getHours()) / element.scaleStep) * element.scaleStep);
                    maxDate.setHours(maxDate.getHours() + element.scaleStep * 3);
                    break;
                case "weeks":
                    // wtf is happening here?
                    bd = new Date(maxDate.getTime());
                    bd = new Date(bd.setDate(bd.getDate() + 3 * 7));
                    var md = Math.floor(bd.getDate() / 7) * 7;
                    maxDate = new Date(bd.getFullYear(), bd.getMonth(), md === 0 ? 4 : md - 3);
                    break;
                case "months":
                    bd = new Date(maxDate.getFullYear(), maxDate.getMonth(), 1);
                    bd.setMonth(bd.getMonth() + 2);
                    maxDate = new Date(bd.getFullYear(), bd.getMonth(), 1);
                    break;
                case "days":
                     falls through
                default:
                    maxDate.setHours(0);
                    maxDate.setDate(maxDate.getDate() + 3);
                }*/
        return maxDate
      },

      // Return the minimum available date in data depending on the scale
      getMinDate: function(element) {
        var minDate = null
        $.each(element.data, function(i, entry) {
          $.each(entry.values, function(i, date) {
            minDate =
              minDate > tools.dateDeserialize(date.from) || minDate === null
                ? tools.dateDeserialize(date.from)
                : minDate
          })
        })
        minDate = minDate || new Date()
        var bd = null
        bd = new Date(minDate.getTime())
        minDate = new Date(bd.getFullYear() - 1, 9, 1)

        /* switch (settings.scale) {
                case "hours":
                    minDate.setHours(Math.floor((minDate.getHours()) / element.scaleStep) * element.scaleStep);
                    minDate.setHours(minDate.getHours() - element.scaleStep * 3);
                    break;
                case "weeks":
                    // wtf is happening here?
                    var bd = new Date(minDate.getTime());
                    bd = new Date(bd.setDate(bd.getDate() - 3 * 7));
                    var md = Math.floor(bd.getDate() / 7) * 7;
                    minDate = new Date(bd.getFullYear(), bd.getMonth(), md === 0 ? 4 : md - 3);
                    break;
                case "months":
                    minDate.setHours(0, 0, 0, 0);
                    minDate.setDate(1);
                    minDate.setMonth(minDate.getMonth() - 3);
                    break;
                case "days":
                     falls through
                default:
                    minDate.setHours(0, 0, 0, 0);
                    minDate.setDate(minDate.getDate() - 3);
                }*/
        return minDate
      },

      // Return an array of Date objects between `from` and `to`
      parseDateRange: function(from, to) {
        var current = new Date(from.getTime())
        var ret = []
        var i = 0
        do {
          ret[i++] = new Date(current.getTime())
          current.setDate(current.getDate() + 1)
        } while (current <= to)
        return ret
      },

      // Return an array of Date objects between `from` and `to`,
      // scaled hourly
      parseTimeRange: function(from, to, scaleStep) {
        var current = new Date(from)
        var end = new Date(to)

        // GR: Fix begin
        current.setHours(0, 0, 0, 0)

        end.setMilliseconds(0)
        end.setSeconds(0)
        if (end.getMinutes() > 0 || end.getHours() > 0) {
          end.setMinutes(0)
          end.setHours(0)
          end.setTime(end.getTime() + UTC_DAY_IN_MS)
        }
        // GR: Fix end

        var ret = []
        var i = 0
        for (;;) {
          var dayStartTime = new Date(current)
          dayStartTime.setHours(Math.floor(current.getHours() / scaleStep) * scaleStep)

          if (ret[i] && dayStartTime.getDay() !== ret[i].getDay()) {
            // If mark-cursor jumped to next day, make sure it starts at 0 hours
            dayStartTime.setHours(0)
          }
          ret[i] = dayStartTime

          // Note that we use ">" because we want to include the end-time point.
          if (current > to) {
            break
          }

          /* BUG-2: current is moved backwards producing a dead-lock! (crashes chrome/IE/firefox)
                     * SEE: https://github.com/taitems/jQuery.Gantt/issues/62
                    if (current.getDay() !== ret[i].getDay()) {
                       current.setHours(0);
                    }
                    */

          // GR Fix Begin
          current = ktkGetNextDate(dayStartTime, scaleStep)
          // GR Fix End

          i++
        }

        return ret
      },

      // Return an array of Date objects between a range of weeks
      // between `from` and `to`
      parseWeeksRange: function(from, to) {
        var current = from.getDayForWeek()

        var ret = []
        var i = 0
        do {
          ret[i++] = current.getDayForWeek()
          current.setDate(current.getDate() + 7)
        } while (current <= to)

        return ret
      },

      // Return an array of Date objects between a range of months
      // between `from` and `to`
      parseMonthsRange: function(from, to) {
        var current = new Date(from)
        var end = new Date(to) // <- never used?

        var ret = []
        var i = 0
        do {
          ret[i++] = new Date(current.getFullYear(), current.getMonth(), 1)
          current.setMonth(current.getMonth() + 1)
        } while (current <= to)

        return ret
      },

      // Deserialize a date from a string or integer
      dateDeserialize: function(date) {
        if (typeof date === 'string') {
          date = date.replace(/\/Date\((.*)\)\//, '$1')
          date = $.isNumeric(date) ? parseInt(date, 10) : $.trim(date)
        }
        return new Date(date)
      },

      // Generate an id for a date
      genId: function(t) {
        // varargs
        if ($.isNumeric(t)) {
          t = new Date(t)
        }
        switch (settings.scale) {
          case 'hours':
            var hour = t.getHours()
            if (arguments.length >= 2) {
              hour = Math.floor(t.getHours() / arguments[1]) * arguments[1]
            }
            return new Date(t.getFullYear(), t.getMonth(), t.getDate(), hour).getTime()
          case 'weeks':
            var y = t.getFullYear()
            var w = t.getWeekOfYear()
            var m = t.getMonth()
            if (m === 11 && w === 1) {
              y++
            } else if (!m && w > 51) {
              y--
            }
            return y + '-' + w
          case 'months':
            return t.getFullYear() + '-' + t.getMonth()
          case 'days':
          /* falls through */
          default:
            return new Date(t.getFullYear(), t.getMonth(), t.getDate()).getTime()
        }
      },

      // normalizes an array of dates into a map of start-of-day millisecond values
      _datesToDays: function(dates) {
        var dayMap = {}
        for (var i = 0, len = dates.length, day; i < len; i++) {
          day = tools.dateDeserialize(dates[i])
          dayMap[day.setHours(0, 0, 0, 0)] = true
        }
        return dayMap
      },
      // Returns true when the given date appears in the array of holidays, if provided
      isHoliday: (function() {
        // IIFE
        // short-circuits the function if no holidays option was passed
        if (!settings.holidays || !settings.holidays.length) {
          return function() {
            return false
          }
        }
        var holidays = false
        // returns the function that will be used to check for holidayness of a given date
        return function(date) {
          if (!holidays) {
            holidays = tools._datesToDays(settings.holidays)
          }
          return !!holidays[
            // assumes numeric dates are already normalized to start-of-day
            $.isNumeric(date)
              ? date
              : new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime()
          ]
        }
      })(),

      // Get the current cell height
      getCellSize: function() {
        if (typeof tools._getCellSize === 'undefined') {
          var measure = $(
            '<div style="display: none; position: absolute;" class="fn-gantt"><div class="row"></div></div>'
          )
          $('body').append(measure)
          tools._getCellSize = measure.find('.row').height()
          measure.empty().remove()
        }
        return tools._getCellSize
      },

      // Get the current page height
      getPageHeight: function(element) {
        return element.pageNum + 1 === element.pageCount
          ? element.rowsOnLastPage * tools.getCellSize()
          : settings.itemsPerPage * tools.getCellSize()
      },
    }

    this.each(function() {
      this.data = null // Received data
      this.pageNum = 0 // Current page number
      this.pageCount = 0 // Available pages count
      this.rowsOnLastPage = 0 // How many rows on last page
      this.rowsNum = 0 // Number of total rows
      this.hPosition = 0 // Current position on diagram (Horizontal)
      this.dateStart = null
      this.dateEnd = null
      this.scrollClicked = false
      this.scaleOldWidth = null
      this.headerRows = null

      // Update cookie with current scale
      if (settings.useCookie) {
        var sc = $.cookie(settings.cookieKey + 'CurrentScale')
        if (sc) {
          settings.scale = sc
        } else {
          $.cookie(settings.cookieKey + 'CurrentScale', settings.scale)
        }
      }

      switch (settings.scale) {
        //case "hours":
        //    this.headerRows = 5;
        //    this.scaleStep = 8;
        //    break;
        case 'hours':
          this.headerRows = 5
          this.scaleStep = 1
          break
        case 'weeks':
          this.headerRows = 3
          this.scaleStep = 13
          break
        case 'months':
          this.headerRows = 2
          this.scaleStep = 14
          break
        case 'days':
        /* falls through */
        default:
          this.headerRows = 4
          this.scaleStep = 13
      }

      this.scrollNavigation = {
        panelMouseDown: false,
        scrollerMouseDown: false,
        mouseX: null,
        panelMargin: 0,
        repositionDelay: 0,
        panelMaxPos: 0,
        canScroll: true,
      }

      this.gantt = null
      this.loader = null

      core.create(this)
    })
  }
})(jQuery)