/* =========================================================
 * bootstrap-datepicker.js
 * http://www.eyecon.ro/bootstrap-datepicker
 * =========================================================
 * Copyright 2012 Stefan Petre
 * Improvements by Andrew Rowls
 * Updated for Bootstrap 3.x by Ian Serlin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================= */

!function( $ ) {

    function UTCDate(){
        return new Date(Date.UTC.apply(Date, arguments));
    }
    function UTCToday(){
        var today = new Date();
        return UTCDate(today.getUTCFullYear(), today.getUTCMonth(), today.getUTCDate());
    }

    // Picker object

    var Datepicker = function(element, options) {
        var that = this;

        this.element = $(element);
        this.language = options.language||this.element.data('date-language')||"en";
        this.language = this.language in dates ? this.language : this.language.split('-')[0]; //Check if "de-DE" style date is available, if not language should fallback to 2 letter code eg "de"
        this.language = this.language in dates ? this.language : "en";
        this.isRTL = dates[this.language].rtl||false;
        this.format = DPGlobal.parseFormat(options.format||this.element.data('date-format')||dates[this.language].format||'mm/dd/yyyy');
        this.isInline = false;
        this.isInput = this.element.is('input');
        this.component = this.element.is('.date') ? this.element.find('.input-group-addon, .btn') : false;
        this.hasInput = this.component && this.element.find('input').length;
        if(this.component && this.component.length === 0)
            this.component = false;

        this.forceParse = true;
        if ('forceParse' in options) {
            this.forceParse = options.forceParse;
        } else if ('dateForceParse' in this.element.data()) {
            this.forceParse = this.element.data('date-force-parse');
        }

        this.picker = $(DPGlobal.template);
        this._buildEvents();
        this._attachEvents();

        if(this.isInline) {
            this.picker.addClass('datepicker-inline').appendTo(this.element);
        } else {
            this.picker.addClass('datepicker-dropdown dropdown-menu');
        }
        if (this.isRTL){
            this.picker.addClass('datepicker-rtl');
            this.picker.find('.prev .glyphicon, .next .glyphicon')
                .toggleClass('glyphicon-arrow-left glyphicon-arrow-right');
        }

        this.autoclose = false;
        if ('autoclose' in options) {
            this.autoclose = options.autoclose;
        } else if ('dateAutoclose' in this.element.data()) {
            this.autoclose = this.element.data('date-autoclose');
        }

        this.keyboardNavigation = true;
        if ('keyboardNavigation' in options) {
            this.keyboardNavigation = options.keyboardNavigation;
        } else if ('dateKeyboardNavigation' in this.element.data()) {
            this.keyboardNavigation = this.element.data('date-keyboard-navigation');
        }

        this.viewMode = this.startViewMode = 0;
        switch(options.startView || this.element.data('date-start-view')){
            case 2:
            case 'decade':
                this.viewMode = this.startViewMode = 2;
                break;
            case 1:
            case 'year':
                this.viewMode = this.startViewMode = 1;
                break;
        }

        this.minViewMode = options.minViewMode||this.element.data('date-min-view-mode')||0;
        if (typeof this.minViewMode === 'string') {
            switch (this.minViewMode) {
                case 'months':
                    this.minViewMode = 1;
                    break;
                case 'years':
                    this.minViewMode = 2;
                    break;
                default:
                    this.minViewMode = 0;
                    break;
            }
        }

        this.viewMode = this.startViewMode = Math.max(this.startViewMode, this.minViewMode);

        this.todayBtn = (options.todayBtn||this.element.data('date-today-btn')||false);
        this.todayHighlight = (options.todayHighlight||this.element.data('date-today-highlight')||false);

        this.calendarWeeks = false;
        if ('calendarWeeks' in options) {
            this.calendarWeeks = options.calendarWeeks;
        } else if ('dateCalendarWeeks' in this.element.data()) {
            this.calendarWeeks = this.element.data('date-calendar-weeks');
        }
        if (this.calendarWeeks)
            this.picker.find('tfoot th.today')
                .attr('colspan', function(i, val){
                    return parseInt(val) + 1;
                });

        this._allow_update = false;

        this.weekStart = ((options.weekStart||this.element.data('date-weekstart')||dates[this.language].weekStart||0) % 7);
        this.weekEnd = ((this.weekStart + 6) % 7);
        this.startDate = -Infinity;
        this.endDate = Infinity;
        this.daysOfWeekDisabled = [];
        this.setStartDate(options.startDate||this.element.data('date-startdate'));
        this.setEndDate(options.endDate||this.element.data('date-enddate'));
        this.setDaysOfWeekDisabled(options.daysOfWeekDisabled||this.element.data('date-days-of-week-disabled'));
        this.fillDow();
        this.fillMonths();
        this.setRange(options.range);

        this._allow_update = true;

        this.update();
        this.showMode();

        if(this.isInline) {
            this.show();
        }
    };

    Datepicker.prototype = {
        constructor: Datepicker,

        _events: [],
        _secondaryEvents: [],
        _applyEvents: function(evs){
            for (var i=0, el, ev; i<evs.length; i++){
                el = evs[i][0];
                ev = evs[i][1];
                el.on(ev);
            }
        },
        _unapplyEvents: function(evs){
            for (var i=0, el, ev; i<evs.length; i++){
                el = evs[i][0];
                ev = evs[i][1];
                el.off(ev);
            }
        },
        _buildEvents: function(){
            if (this.isInput) { // single input
                this._events = [
                    [this.element, {
                        focus: $.proxy(this.show, this),
                        keyup: $.proxy(this.update, this),
                        keydown: $.proxy(this.keydown, this)
                    }]
                ];
            }
            else if (this.component && this.hasInput){ // component: input + button
                this._events = [
                    // For components that are not readonly, allow keyboard nav
                    [this.element.find('input'), {
                        focus: $.proxy(this.show, this),
                        keyup: $.proxy(this.update, this),
                        keydown: $.proxy(this.keydown, this)
                    }],
                    [this.component, {
                        click: $.proxy(this.show, this)
                    }]
                ];
            }
            else if (this.element.is('div')) {  // inline datepicker
                this.isInline = true;
            }
            else {
                this._events = [
                    [this.element, {
                        click: $.proxy(this.show, this)
                    }]
                ];
            }

            this._secondaryEvents = [
                [this.picker, {
                    click: $.proxy(this.click, this)
                }],
                [$(window), {
                    resize: $.proxy(this.place, this)
                }],
                [$(document), {
                    mousedown: $.proxy(function (e) {
                        // Clicked outside the datepicker, hide it
                        if ($(e.target).closest('.datepicker.datepicker-inline, .datepicker.datepicker-dropdown').length === 0) {
                            this.hide();
                        }
                    }, this)
                }]
            ];
        },
        _attachEvents: function(){
            this._detachEvents();
            this._applyEvents(this._events);
        },
        _detachEvents: function(){
            this._unapplyEvents(this._events);
        },
        _attachSecondaryEvents: function(){
            this._detachSecondaryEvents();
            this._applyEvents(this._secondaryEvents);
        },
        _detachSecondaryEvents: function(){
            this._unapplyEvents(this._secondaryEvents);
        },

        show: function(e) {
            if (!this.isInline)
                this.picker.appendTo('body');
            this.picker.show();
            this.height = this.component ? this.component.outerHeight() : this.element.outerHeight();
            this.place();
            this._attachSecondaryEvents();
            if (e) {
                e.preventDefault();
            }
            this.element.trigger({
                type: 'show',
                date: this.date
            });
        },

        hide: function(e){
            if(this.isInline) return;
            if (!this.picker.is(':visible')) return;
            this.picker.hide().detach();
            this._detachSecondaryEvents();
            this.viewMode = this.startViewMode;
            this.showMode();

            if (
                this.forceParse &&
                    (
                        this.isInput && this.element.val() ||
                            this.hasInput && this.element.find('input').val()
                        )
                )
                this.setValue();
            this.element.trigger({
                type: 'hide',
                date: this.date
            });
        },

        remove: function() {
            this.hide();
            this._detachEvents();
            this._detachSecondaryEvents();
            this.picker.remove();
            delete this.element.data().datepicker;
            if (!this.isInput) {
                delete this.element.data().date;
            }
        },

        getDate: function() {
            var d = this.getUTCDate();
            return new Date(d.getTime() + (d.getTimezoneOffset()*60000));
        },

        getUTCDate: function() {
            return this.date;
        },

        setDate: function(d) {
            this.setUTCDate(new Date(d.getTime() - (d.getTimezoneOffset()*60000)));
        },

        setUTCDate: function(d) {
            this.date = d;
            this.setValue();
        },

        setValue: function() {
            var formatted = this.getFormattedDate();
            if (!this.isInput) {
                if (this.component){
                    this.element.find('input').val(formatted);
                }
            } else {
                this.element.val(formatted);
            }
        },

        getFormattedDate: function(format) {
            if (format === undefined)
                format = this.format;
            return DPGlobal.formatDate(this.date, format, this.language);
        },

        setStartDate: function(startDate){
            this.startDate = startDate||-Infinity;
            if (this.startDate !== -Infinity) {
                this.startDate = DPGlobal.parseDate(this.startDate, this.format, this.language);
            }
            this.update();
            this.updateNavArrows();
        },

        setEndDate: function(endDate){
            this.endDate = endDate||Infinity;
            if (this.endDate !== Infinity) {
                this.endDate = DPGlobal.parseDate(this.endDate, this.format, this.language);
            }
            this.update();
            this.updateNavArrows();
        },

        setDaysOfWeekDisabled: function(daysOfWeekDisabled){
            this.daysOfWeekDisabled = daysOfWeekDisabled||[];
            if (!$.isArray(this.daysOfWeekDisabled)) {
                this.daysOfWeekDisabled = this.daysOfWeekDisabled.split(/,\s*/);
            }
            this.daysOfWeekDisabled = $.map(this.daysOfWeekDisabled, function (d) {
                return parseInt(d, 10);
            });
            this.update();
            this.updateNavArrows();
        },

        place: function(){
            if(this.isInline) return;
            var zIndex = parseInt(this.element.parents().filter(function() {
                return $(this).css('z-index') != 'auto';
            }).first().css('z-index'))+10;
            var offset = this.component ? this.component.parent().offset() : this.element.offset();
            var height = this.component ? this.component.outerHeight(true) : this.element.outerHeight(true);
            this.picker.css({
                top: offset.top + height,
                left: offset.left,
                zIndex: zIndex
            });
        },

        _allow_update: true,
        update: function(){
            if (!this._allow_update) return;

            var date, fromArgs = false;
            if(arguments && arguments.length && (typeof arguments[0] === 'string' || arguments[0] instanceof Date)) {
                date = arguments[0];
                fromArgs = true;
            } else {
                date = this.isInput ? this.element.val() : this.element.data('date') || this.element.find('input').val();
                delete this.element.data().date;
            }

            this.date = DPGlobal.parseDate(date, this.format, this.language);

            if(fromArgs) this.setValue();

            if (this.date < this.startDate) {
                this.viewDate = new Date(this.startDate);
            } else if (this.date > this.endDate) {
                this.viewDate = new Date(this.endDate);
            } else {
                this.viewDate = new Date(this.date);
            }
            this.fill();
        },

        fillDow: function(){
            var dowCnt = this.weekStart,
                html = '<tr>';
            if(this.calendarWeeks){
                var cell = '<th class="cw">&nbsp;</th>';
                html += cell;
                this.picker.find('.datepicker-days thead tr:first-child').prepend(cell);
            }
            while (dowCnt < this.weekStart + 7) {
                html += '<th class="dow">'+dates[this.language].daysMin[(dowCnt++)%7]+'</th>';
            }
            html += '</tr>';
            this.picker.find('.datepicker-days thead').append(html);
        },

        fillMonths: function(){
            var html = '',
                i = 0;
            while (i < 12) {
                html += '<span class="month">'+dates[this.language].monthsShort[i++]+'</span>';
            }
            this.picker.find('.datepicker-months td').html(html);
        },

        setRange: function(range){
            if (!range || !range.length)
                delete this.range;
            else
                this.range = $.map(range, function(d){ return d.valueOf(); });
            this.fill();
        },

        getClassNames: function(date){
            var cls = [],
                year = this.viewDate.getUTCFullYear(),
                month = this.viewDate.getUTCMonth(),
                currentDate = this.date.valueOf(),
                today = new Date();
            if (date.getUTCFullYear() < year || (date.getUTCFullYear() == year && date.getUTCMonth() < month)) {
                cls.push('old');
            } else if (date.getUTCFullYear() > year || (date.getUTCFullYear() == year && date.getUTCMonth() > month)) {
                cls.push('new');
            }
            // Compare internal UTC date with local today, not UTC today
            if (this.todayHighlight &&
                date.getUTCFullYear() == today.getFullYear() &&
                date.getUTCMonth() == today.getMonth() &&
                date.getUTCDate() == today.getDate()) {
                cls.push('today');
            }
            if (currentDate && date.valueOf() == currentDate) {
                cls.push('active');
            }
            if (date.valueOf() < this.startDate || date.valueOf() > this.endDate ||
                $.inArray(date.getUTCDay(), this.daysOfWeekDisabled) !== -1) {
                cls.push('disabled');
            }
            if (this.range){
                if (date > this.range[0] && date < this.range[this.range.length-1]){
                    cls.push('range');
                }
                if ($.inArray(date.valueOf(), this.range) != -1){
                    cls.push('selected');
                }
            }
            return cls;
        },

        fill: function() {
            var d = new Date(this.viewDate),
                year = d.getUTCFullYear(),
                month = d.getUTCMonth(),
                startYear = this.startDate !== -Infinity ? this.startDate.getUTCFullYear() : -Infinity,
                startMonth = this.startDate !== -Infinity ? this.startDate.getUTCMonth() : -Infinity,
                endYear = this.endDate !== Infinity ? this.endDate.getUTCFullYear() : Infinity,
                endMonth = this.endDate !== Infinity ? this.endDate.getUTCMonth() : Infinity,
                currentDate = this.date && this.date.valueOf();
            this.picker.find('.datepicker-days thead th.datepicker-switch')
                .text(dates[this.language].months[month]+' '+year);
            this.picker.find('tfoot th.today')
                .text(dates[this.language].today)
                .toggle(this.todayBtn !== false);
            this.updateNavArrows();
            this.fillMonths();
            var prevMonth = UTCDate(year, month-1, 28,0,0,0,0),
                day = DPGlobal.getDaysInMonth(prevMonth.getUTCFullYear(), prevMonth.getUTCMonth());
            prevMonth.setUTCDate(day);
            prevMonth.setUTCDate(day - (prevMonth.getUTCDay() - this.weekStart + 7)%7);
            var nextMonth = new Date(prevMonth);
            nextMonth.setUTCDate(nextMonth.getUTCDate() + 42);
            nextMonth = nextMonth.valueOf();
            var html = [];
            var clsName;
            while(prevMonth.valueOf() < nextMonth) {
                if (prevMonth.getUTCDay() == this.weekStart) {
                    html.push('<tr>');
                    if(this.calendarWeeks){
                        // ISO 8601: First week contains first thursday.
                        // ISO also states week starts on Monday, but we can be more abstract here.
                        var
                        // Start of current week: based on weekstart/current date
                            ws = new Date(+prevMonth + (this.weekStart - prevMonth.getUTCDay() - 7) % 7 * 864e5),
                        // Thursday of this week
                            th = new Date(+ws + (7 + 4 - ws.getUTCDay()) % 7 * 864e5),
                        // First Thursday of year, year from thursday
                            yth = new Date(+(yth = UTCDate(th.getUTCFullYear(), 0, 1)) + (7 + 4 - yth.getUTCDay())%7*864e5),
                        // Calendar week: ms between thursdays, div ms per day, div 7 days
                            calWeek =  (th - yth) / 864e5 / 7 + 1;
                        html.push('<td class="cw">'+ calWeek +'</td>');

                    }
                }
                clsName = this.getClassNames(prevMonth);
                clsName.push('day');
                html.push('<td class="'+clsName.join(' ')+'">'+prevMonth.getUTCDate() + '</td>');
                if (prevMonth.getUTCDay() == this.weekEnd) {
                    html.push('</tr>');
                }
                prevMonth.setUTCDate(prevMonth.getUTCDate()+1);
            }
            this.picker.find('.datepicker-days tbody').empty().append(html.join(''));
            var currentYear = this.date && this.date.getUTCFullYear();

            var months = this.picker.find('.datepicker-months')
                .find('th:eq(1)')
                .text(year)
                .end()
                .find('span').removeClass('active');
            if (currentYear && currentYear == year) {
                months.eq(this.date.getUTCMonth()).addClass('active');
            }
            if (year < startYear || year > endYear) {
                months.addClass('disabled');
            }
            if (year == startYear) {
                months.slice(0, startMonth).addClass('disabled');
            }
            if (year == endYear) {
                months.slice(endMonth+1).addClass('disabled');
            }

            html = '';
            year = parseInt(year/10, 10) * 10;
            var yearCont = this.picker.find('.datepicker-years')
                .find('th:eq(1)')
                .text(year + '-' + (year + 9))
                .end()
                .find('td');
            year -= 1;
            for (var i = -1; i < 11; i++) {
                html += '<span class="year'+(i == -1 || i == 10 ? ' old' : '')+(currentYear == year ? ' active' : '')+(year < startYear || year > endYear ? ' disabled' : '')+'">'+year+'</span>';
                year += 1;
            }
            yearCont.html(html);
        },

        updateNavArrows: function() {
            if (!this._allow_update) return;

            var d = new Date(this.viewDate),
                year = d.getUTCFullYear(),
                month = d.getUTCMonth();
            switch (this.viewMode) {
                case 0:
                    if (this.startDate !== -Infinity && year <= this.startDate.getUTCFullYear() && month <= this.startDate.getUTCMonth()) {
                        this.picker.find('.prev').css({visibility: 'hidden'});
                    } else {
                        this.picker.find('.prev').css({visibility: 'visible'});
                    }
                    if (this.endDate !== Infinity && year >= this.endDate.getUTCFullYear() && month >= this.endDate.getUTCMonth()) {
                        this.picker.find('.next').css({visibility: 'hidden'});
                    } else {
                        this.picker.find('.next').css({visibility: 'visible'});
                    }
                    break;
                case 1:
                case 2:
                    if (this.startDate !== -Infinity && year <= this.startDate.getUTCFullYear()) {
                        this.picker.find('.prev').css({visibility: 'hidden'});
                    } else {
                        this.picker.find('.prev').css({visibility: 'visible'});
                    }
                    if (this.endDate !== Infinity && year >= this.endDate.getUTCFullYear()) {
                        this.picker.find('.next').css({visibility: 'hidden'});
                    } else {
                        this.picker.find('.next').css({visibility: 'visible'});
                    }
                    break;
            }
        },

        click: function(e) {
            e.preventDefault();
            var target = $(e.target).closest('span, td, th');
            if (target.length == 1) {
                switch(target[0].nodeName.toLowerCase()) {
                    case 'th':
                        switch(target[0].className) {
                            case 'datepicker-switch':
                                this.showMode(1);
                                break;
                            case 'prev':
                            case 'next':
                                var dir = DPGlobal.modes[this.viewMode].navStep * (target[0].className == 'prev' ? -1 : 1);
                                switch(this.viewMode){
                                    case 0:
                                        this.viewDate = this.moveMonth(this.viewDate, dir);
                                        break;
                                    case 1:
                                    case 2:
                                        this.viewDate = this.moveYear(this.viewDate, dir);
                                        break;
                                }
                                this.fill();
                                break;
                            case 'today':
                                var date = new Date();
                                date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);

                                this.showMode(-2);
                                var which = this.todayBtn == 'linked' ? null : 'view';
                                this._setDate(date, which);
                                break;
                        }
                        break;
                    case 'span':
                        if (!target.is('.disabled')) {
                            this.viewDate.setUTCDate(1);
                            if (target.is('.month')) {
                                var day = 1;
                                var month = target.parent().find('span').index(target);
                                var year = this.viewDate.getUTCFullYear();
                                this.viewDate.setUTCMonth(month);
                                this.element.trigger({
                                    type: 'changeMonth',
                                    date: this.viewDate
                                });
                                if ( this.minViewMode == 1 ) {
                                    this._setDate(UTCDate(year, month, day,0,0,0,0));
                                }
                            } else {
                                var year = parseInt(target.text(), 10)||0;
                                var day = 1;
                                var month = 0;
                                this.viewDate.setUTCFullYear(year);
                                this.element.trigger({
                                    type: 'changeYear',
                                    date: this.viewDate
                                });
                                if ( this.minViewMode == 2 ) {
                                    this._setDate(UTCDate(year, month, day,0,0,0,0));
                                }
                            }
                            this.showMode(-1);
                            this.fill();
                        }
                        break;
                    case 'td':
                        if (target.is('.day') && !target.is('.disabled')){
                            var day = parseInt(target.text(), 10)||1;
                            var year = this.viewDate.getUTCFullYear(),
                                month = this.viewDate.getUTCMonth();
                            if (target.is('.old')) {
                                if (month === 0) {
                                    month = 11;
                                    year -= 1;
                                } else {
                                    month -= 1;
                                }
                            } else if (target.is('.new')) {
                                if (month == 11) {
                                    month = 0;
                                    year += 1;
                                } else {
                                    month += 1;
                                }
                            }
                            this._setDate(UTCDate(year, month, day,0,0,0,0));
                        }
                        break;
                }
            }
        },

        _setDate: function(date, which){
            if (!which || which == 'date')
                this.date = date;
            if (!which || which  == 'view')
                this.viewDate = date;
            this.fill();
            this.setValue();
            this.element.trigger({
                type: 'changeDate',
                date: this.date
            });
            var element;
            if (this.isInput) {
                element = this.element;
            } else if (this.component){
                element = this.element.find('input');
            }
            if (element) {
                element.change();
                if (this.autoclose && (!which || which == 'date')) {
                    this.hide();
                }
            }
        },

        moveMonth: function(date, dir){
            if (!dir) return date;
            var new_date = new Date(date.valueOf()),
                day = new_date.getUTCDate(),
                month = new_date.getUTCMonth(),
                mag = Math.abs(dir),
                new_month, test;
            dir = dir > 0 ? 1 : -1;
            if (mag == 1){
                test = dir == -1
                    // If going back one month, make sure month is not current month
                    // (eg, Mar 31 -> Feb 31 == Feb 28, not Mar 02)
                    ? function(){ return new_date.getUTCMonth() == month; }
                    // If going forward one month, make sure month is as expected
                    // (eg, Jan 31 -> Feb 31 == Feb 28, not Mar 02)
                    : function(){ return new_date.getUTCMonth() != new_month; };
                new_month = month + dir;
                new_date.setUTCMonth(new_month);
                // Dec -> Jan (12) or Jan -> Dec (-1) -- limit expected date to 0-11
                if (new_month < 0 || new_month > 11)
                    new_month = (new_month + 12) % 12;
            } else {
                // For magnitudes >1, move one month at a time...
                for (var i=0; i<mag; i++)
                    // ...which might decrease the day (eg, Jan 31 to Feb 28, etc)...
                    new_date = this.moveMonth(new_date, dir);
                // ...then reset the day, keeping it in the new month
                new_month = new_date.getUTCMonth();
                new_date.setUTCDate(day);
                test = function(){ return new_month != new_date.getUTCMonth(); };
            }
            // Common date-resetting loop -- if date is beyond end of month, make it
            // end of month
            while (test()){
                new_date.setUTCDate(--day);
                new_date.setUTCMonth(new_month);
            }
            return new_date;
        },

        moveYear: function(date, dir){
            return this.moveMonth(date, dir*12);
        },

        dateWithinRange: function(date){
            return date >= this.startDate && date <= this.endDate;
        },

        keydown: function(e){
            if (this.picker.is(':not(:visible)')){
                if (e.keyCode == 27) // allow escape to hide and re-show picker
                    this.show();
                return;
            }
            var dateChanged = false,
                dir, day, month,
                newDate, newViewDate;
            switch(e.keyCode){
                case 27: // escape
                    this.hide();
                    e.preventDefault();
                    break;
                case 37: // left
                case 39: // right
                    if (!this.keyboardNavigation) break;
                    dir = e.keyCode == 37 ? -1 : 1;
                    if (e.ctrlKey){
                        newDate = this.moveYear(this.date, dir);
                        newViewDate = this.moveYear(this.viewDate, dir);
                    } else if (e.shiftKey){
                        newDate = this.moveMonth(this.date, dir);
                        newViewDate = this.moveMonth(this.viewDate, dir);
                    } else {
                        newDate = new Date(this.date);
                        newDate.setUTCDate(this.date.getUTCDate() + dir);
                        newViewDate = new Date(this.viewDate);
                        newViewDate.setUTCDate(this.viewDate.getUTCDate() + dir);
                    }
                    if (this.dateWithinRange(newDate)){
                        this.date = newDate;
                        this.viewDate = newViewDate;
                        this.setValue();
                        this.update();
                        e.preventDefault();
                        dateChanged = true;
                    }
                    break;
                case 38: // up
                case 40: // down
                    if (!this.keyboardNavigation) break;
                    dir = e.keyCode == 38 ? -1 : 1;
                    if (e.ctrlKey){
                        newDate = this.moveYear(this.date, dir);
                        newViewDate = this.moveYear(this.viewDate, dir);
                    } else if (e.shiftKey){
                        newDate = this.moveMonth(this.date, dir);
                        newViewDate = this.moveMonth(this.viewDate, dir);
                    } else {
                        newDate = new Date(this.date);
                        newDate.setUTCDate(this.date.getUTCDate() + dir * 7);
                        newViewDate = new Date(this.viewDate);
                        newViewDate.setUTCDate(this.viewDate.getUTCDate() + dir * 7);
                    }
                    if (this.dateWithinRange(newDate)){
                        this.date = newDate;
                        this.viewDate = newViewDate;
                        this.setValue();
                        this.update();
                        e.preventDefault();
                        dateChanged = true;
                    }
                    break;
                case 13: // enter
                    this.hide();
                    e.preventDefault();
                    break;
                case 9: // tab
                    this.hide();
                    break;
            }
            if (dateChanged){
                this.element.trigger({
                    type: 'changeDate',
                    date: this.date
                });
                var element;
                if (this.isInput) {
                    element = this.element;
                } else if (this.component){
                    element = this.element.find('input');
                }
                if (element) {
                    element.change();
                }
            }
        },

        showMode: function(dir) {
            if (dir) {
                this.viewMode = Math.max(this.minViewMode, Math.min(2, this.viewMode + dir));
            }
            /*
             vitalets: fixing bug of very special conditions:
             jquery 1.7.1 + webkit + show inline datepicker in bootstrap popover.
             Method show() does not set display css correctly and datepicker is not shown.
             Changed to .css('display', 'block') solve the problem.
             See https://github.com/vitalets/x-editable/issues/37

             In jquery 1.7.2+ everything works fine.
             */
            //this.picker.find('>div').hide().filter('.datepicker-'+DPGlobal.modes[this.viewMode].clsName).show();
            this.picker.find('>div').hide().filter('.datepicker-'+DPGlobal.modes[this.viewMode].clsName).css('display', 'block');
            this.updateNavArrows();
        }
    };

    var DateRangePicker = function(element, options){
        this.element = $(element);
        this.inputs = $.map(options.inputs, function(i){ return i.jquery ? i[0] : i; });
        delete options.inputs;

        $(this.inputs)
            .datepicker(options)
            .bind('changeDate', $.proxy(this.dateUpdated, this));

        this.pickers = $.map(this.inputs, function(i){ return $(i).data('datepicker'); });
        this.updateDates();
    };
    DateRangePicker.prototype = {
        updateDates: function(){
            this.dates = $.map(this.pickers, function(i){ return i.date; });
            this.updateRanges();
        },
        updateRanges: function(){
            var range = $.map(this.dates, function(d){ return d.valueOf(); });
            $.each(this.pickers, function(i, p){
                p.setRange(range);
            });
        },
        dateUpdated: function(e){
            var dp = $(e.target).data('datepicker'),
                new_date = e.date,
                i = $.inArray(e.target, this.inputs),
                l = this.inputs.length;
            if (i == -1) return;

            if (new_date < this.dates[i]){
                // Date being moved earlier/left
                while (i>=0 && new_date < this.dates[i]){
                    this.pickers[i--].setUTCDate(new_date);
                }
            }
            else if (new_date > this.dates[i]){
                // Date being moved later/right
                while (i<l && new_date > this.dates[i]){
                    this.pickers[i++].setUTCDate(new_date);
                }
            }
            this.updateDates();
        },
        remove: function(){
            $.map(this.pickers, function(p){ p.remove(); });
            delete this.element.data().datepicker;
        }
    };

    var old = $.fn.datepicker;
    $.fn.datepicker = function ( option ) {
        var args = Array.apply(null, arguments);
        args.shift();
        return this.each(function () {
            var $this = $(this),
                data = $this.data('datepicker'),
                options = typeof option == 'object' && option;
            if (!data) {
                if ($this.is('.input-daterange') || options.inputs){
                    var opts = {
                        inputs: options.inputs || $this.find('input').toArray()
                    };
                    $this.data('datepicker', (data = new DateRangePicker(this, $.extend(opts, $.fn.datepicker.defaults,options))));
                }
                else{
                    $this.data('datepicker', (data = new Datepicker(this, $.extend({}, $.fn.datepicker.defaults,options))));
                }
            }
            if (typeof option == 'string' && typeof data[option] == 'function') {
                data[option].apply(data, args);
            }
        });
    };

    $.fn.datepicker.defaults = {
    };
    $.fn.datepicker.Constructor = Datepicker;
    var dates = $.fn.datepicker.dates = {
        en: {
            days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],
            daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
            daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
            months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
            monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
            today: "Today"
        }
    };

    var DPGlobal = {
        modes: [
            {
                clsName: 'days',
                navFnc: 'Month',
                navStep: 1
            },
            {
                clsName: 'months',
                navFnc: 'FullYear',
                navStep: 1
            },
            {
                clsName: 'years',
                navFnc: 'FullYear',
                navStep: 10
            }],
        isLeapYear: function (year) {
            return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));
        },
        getDaysInMonth: function (year, month) {
            return [31, (DPGlobal.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
        },
        validParts: /dd?|DD?|mm?|MM?|yy(?:yy)?/g,
        nonpunctuation: /[^ -\/:-@\[\u3400-\u9fff-`{-~\t\n\r]+/g,
        parseFormat: function(format){
            // IE treats \0 as a string end in inputs (truncating the value),
            // so it's a bad format delimiter, anyway
            var separators = format.replace(this.validParts, '\0').split('\0'),
                parts = format.match(this.validParts);
            if (!separators || !separators.length || !parts || parts.length === 0){
                throw new Error("Invalid date format.");
            }
            return {separators: separators, parts: parts};
        },
        parseDate: function(date, format, language) {
            if (date instanceof Date) return date;
            if (/^[\-+]\d+[dmwy]([\s,]+[\-+]\d+[dmwy])*$/.test(date)) {
                var part_re = /([\-+]\d+)([dmwy])/,
                    parts = date.match(/([\-+]\d+)([dmwy])/g),
                    part, dir;
                date = new Date();
                for (var i=0; i<parts.length; i++) {
                    part = part_re.exec(parts[i]);
                    dir = parseInt(part[1]);
                    switch(part[2]){
                        case 'd':
                            date.setUTCDate(date.getUTCDate() + dir);
                            break;
                        case 'm':
                            date = Datepicker.prototype.moveMonth.call(Datepicker.prototype, date, dir);
                            break;
                        case 'w':
                            date.setUTCDate(date.getUTCDate() + dir * 7);
                            break;
                        case 'y':
                            date = Datepicker.prototype.moveYear.call(Datepicker.prototype, date, dir);
                            break;
                    }
                }
                return UTCDate(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), 0, 0, 0);
            }
            var parts = date && date.match(this.nonpunctuation) || [],
                date = new Date(),
                parsed = {},
                setters_order = ['yyyy', 'yy', 'M', 'MM', 'm', 'mm', 'd', 'dd'],
                setters_map = {
                    yyyy: function(d,v){ return d.setUTCFullYear(v); },
                    yy: function(d,v){ return d.setUTCFullYear(2000+v); },
                    m: function(d,v){
                        v -= 1;
                        while (v<0) v += 12;
                        v %= 12;
                        d.setUTCMonth(v);
                        while (d.getUTCMonth() != v)
                            d.setUTCDate(d.getUTCDate()-1);
                        return d;
                    },
                    d: function(d,v){ return d.setUTCDate(v); }
                },
                val, filtered, part;
            setters_map['M'] = setters_map['MM'] = setters_map['mm'] = setters_map['m'];
            setters_map['dd'] = setters_map['d'];
            date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);
            var fparts = format.parts.slice();
            // Remove noop parts
            if (parts.length != fparts.length) {
                fparts = $(fparts).filter(function(i,p){
                    return $.inArray(p, setters_order) !== -1;
                }).toArray();
            }
            // Process remainder
            if (parts.length == fparts.length) {
                for (var i=0, cnt = fparts.length; i < cnt; i++) {
                    val = parseInt(parts[i], 10);
                    part = fparts[i];
                    if (isNaN(val)) {
                        switch(part) {
                            case 'MM':
                                filtered = $(dates[language].months).filter(function(){
                                    var m = this.slice(0, parts[i].length),
                                        p = parts[i].slice(0, m.length);
                                    return m == p;
                                });
                                val = $.inArray(filtered[0], dates[language].months) + 1;
                                break;
                            case 'M':
                                filtered = $(dates[language].monthsShort).filter(function(){
                                    var m = this.slice(0, parts[i].length),
                                        p = parts[i].slice(0, m.length);
                                    return m == p;
                                });
                                val = $.inArray(filtered[0], dates[language].monthsShort) + 1;
                                break;
                        }
                    }
                    parsed[part] = val;
                }
                for (var i=0, s; i<setters_order.length; i++){
                    s = setters_order[i];
                    if (s in parsed && !isNaN(parsed[s]))
                        setters_map[s](date, parsed[s]);
                }
            }
            return date;
        },
        formatDate: function(date, format, language){
            var val = {
                d: date.getUTCDate(),
                D: dates[language].daysShort[date.getUTCDay()],
                DD: dates[language].days[date.getUTCDay()],
                m: date.getUTCMonth() + 1,
                M: dates[language].monthsShort[date.getUTCMonth()],
                MM: dates[language].months[date.getUTCMonth()],
                yy: date.getUTCFullYear().toString().substring(2),
                yyyy: date.getUTCFullYear()
            };
            val.dd = (val.d < 10 ? '0' : '') + val.d;
            val.mm = (val.m < 10 ? '0' : '') + val.m;
            var date = [],
                seps = $.extend([], format.separators);
            for (var i=0, cnt = format.parts.length; i < cnt; i++) {
                if (seps.length)
                    date.push(seps.shift());
                date.push(val[format.parts[i]]);
            }
            return date.join('');
        },
        headTemplate: '<thead>'+
            '<tr>'+
            '<th class="prev"><i class="glyphicon glyphicon-arrow-left"/></th>'+
            '<th colspan="5" class="datepicker-switch"></th>'+
            '<th class="next"><i class="glyphicon glyphicon-arrow-right"/></th>'+
            '</tr>'+
            '</thead>',
        contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>',
        footTemplate: '<tfoot><tr><th colspan="7" class="today"></th></tr></tfoot>'
    };
    DPGlobal.template = '<div class="datepicker">'+
        '<div class="datepicker-days">'+
        '<table class=" table-condensed">'+
        DPGlobal.headTemplate+
        '<tbody></tbody>'+
        DPGlobal.footTemplate+
        '</table>'+
        '</div>'+
        '<div class="datepicker-months">'+
        '<table class="table-condensed">'+
        DPGlobal.headTemplate+
        DPGlobal.contTemplate+
        DPGlobal.footTemplate+
        '</table>'+
        '</div>'+
        '<div class="datepicker-years">'+
        '<table class="table-condensed">'+
        DPGlobal.headTemplate+
        DPGlobal.contTemplate+
        DPGlobal.footTemplate+
        '</table>'+
        '</div>'+
        '</div>';

    $.fn.datepicker.DPGlobal = DPGlobal;


    /* DATEPICKER NO CONFLICT
     * =================== */

    $.fn.datepicker.noConflict = function(){
        $.fn.datepicker = old;
        return this;
    };


    /* DATEPICKER DATA-API
     * ================== */

    $(document).on(
        'focus.datepicker.data-api click.datepicker.data-api',
        '[data-provide="datepicker"]',
        function(e){
            var $this = $(this);
            if ($this.data('datepicker')) return;
            e.preventDefault();
            // component click requires us to explicitly show it
            $this.datepicker('show');
        }
    );
    $(function(){
        $('[data-provide="datepicker-inline"]').datepicker();
    });

}( window.jQuery );