/* =========================================================

* bootstrap-datepicker.js
* http://www.eyecon.ro/bootstrap-datepicker
* =========================================================
* Copyright 2012 Stefan Petre
* Improvements by Andrew Rowls
*
* 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._process_options(options);
        this.element = $(element);
        this.isInline = false;
        this.isInput = this.element.is('input');
        this.component = this.element.is('.date') ? this.element.find('.add-on, .btn, .input-group-addon') : false;
        this.hasInput = this.component && this.element.find('input').length;
        if(this.component && this.component.length === 0)
                this.component = false;
        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.o.rtl){
                this.picker.addClass('datepicker-rtl');
                this.picker.find('.prev i, .next i')
                                        .toggleClass('glyphicon glyphicon-arrow-left glyphicon-arrow-right');
        }
        this.viewMode = this.o.startView;
        if (this.o.calendarWeeks)
                this.picker.find('tfoot th.today')
                                        .attr('colspan', function(i, val){
                                                return parseInt(val) + 1;
                                        });
        this._allow_update = false;
        this.setStartDate(this.o.startDate);
        this.setEndDate(this.o.endDate);
        this.setDaysOfWeekDisabled(this.o.daysOfWeekDisabled);
        this.fillDow();
        this.fillMonths();
        this._allow_update = true;
        this.update();
        this.showMode();
        if(this.isInline) {
                this.show();
        }
};
Datepicker.prototype = {
        constructor: Datepicker,
        _process_options: function(opts){
                // Store raw options for reference
                this._o = $.extend({}, this._o, opts);
                // Processed options
                var o = this.o = $.extend({}, this._o);
                // Check if "de-DE" style date is available, if not language should
                // fallback to 2 letter code eg "de"
                var lang = o.language;
                if (!dates[lang]) {
                        lang = lang.split('-')[0];
                        if (!dates[lang])
                                lang = defaults.language;
                }
                o.language = lang;
                switch(o.startView){
                        case 2:
                        case 'decade':
                                o.startView = 2;
                                break;
                        case 1:
                        case 'year':
                                o.startView = 1;
                                break;
                        default:
                                o.startView = 0;
                }
                switch (o.minViewMode) {
                        case 1:
                        case 'months':
                                o.minViewMode = 1;
                                break;
                        case 2:
                        case 'years':
                                o.minViewMode = 2;
                                break;
                        default:
                                o.minViewMode = 0;
                }
                o.startView = Math.max(o.startView, o.minViewMode);
                o.weekStart %= 7;
                o.weekEnd = ((o.weekStart + 6) % 7);
                var format = DPGlobal.parseFormat(o.format)
                if (o.startDate !== -Infinity) {
                        o.startDate = DPGlobal.parseDate(o.startDate, format, o.language);
                }
                if (o.endDate !== Infinity) {
                        o.endDate = DPGlobal.parseDate(o.endDate, format, o.language);
                }
                o.daysOfWeekDisabled = o.daysOfWeekDisabled||[];
                if (!$.isArray(o.daysOfWeekDisabled))
                        o.daysOfWeekDisabled = o.daysOfWeekDisabled.split(/[,\s]*/);
                o.daysOfWeekDisabled = $.map(o.daysOfWeekDisabled, function (d) {
                        return parseInt(d, 10);
                });
        },
        _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 (!(
                                                this.element.is(e.target) ||
                                                this.element.find(e.target).size() ||
                                                this.picker.is(e.target) ||
                                                this.picker.find(e.target).size()
                                        )) {
                                                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);
        },
        _trigger: function(event, altdate){
                var date = altdate || this.date,
                        local_date = new Date(date.getTime() + (date.getTimezoneOffset()*60000));
                this.element.trigger({
                        type: event,
                        date: local_date,
                        format: $.proxy(function(altformat){
                                var format = altformat || this.o.format;
                                return DPGlobal.formatDate(date, format, this.o.language);
                        }, this)
                });
        },
        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._trigger('show');
        },
        hide: function(e){
                if(this.isInline) return;
                if (!this.picker.is(':visible')) return;
                this.picker.hide().detach();
                this._detachSecondaryEvents();
                this.viewMode = this.o.startView;
                this.showMode();
                if (
                        this.o.forceParse &&
                        (
                                this.isInput && this.element.val() ||
                                this.hasInput && this.element.find('input').val()
                        )
                )
                        this.setValue();
                this._trigger('hide');
        },
        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.o.format;
                return DPGlobal.formatDate(this.date, format, this.o.language);
        },
        setStartDate: function(startDate){
                this._process_options({startDate: startDate});
                this.update();
                this.updateNavArrows();
        },
        setEndDate: function(endDate){
                this._process_options({endDate: endDate});
                this.update();
                this.updateNavArrows();
        },
        setDaysOfWeekDisabled: function(daysOfWeekDisabled){
                this._process_options({daysOfWeekDisabled: daysOfWeekDisabled});
                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.o.format, this.o.language);
                if(fromArgs) this.setValue();
                if (this.date < this.o.startDate) {
                        this.viewDate = new Date(this.o.startDate);
                } else if (this.date > this.o.endDate) {
                        this.viewDate = new Date(this.o.endDate);
                } else {
                        this.viewDate = new Date(this.date);
                }
                this.fill();
        },
        fillDow: function(){
                var dowCnt = this.o.weekStart,
                html = '<tr>';
                if(this.o.calendarWeeks){
                        var cell = '<th class="cw">&nbsp;</th>';
                        html += cell;
                        this.picker.find('.datepicker-days thead tr:first-child').prepend(cell);
                }
                while (dowCnt < this.o.weekStart + 7) {
                        html += '<th class="dow">'+dates[this.o.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.o.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.o.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.o.startDate || date.valueOf() > this.o.endDate ||
                        $.inArray(date.getUTCDay(), this.o.daysOfWeekDisabled) !== -1) {
                        cls.push('disabled');
                }
                if (this.range){
                        if (date > this.range[0] && date < this.range[this.range.length-1]){
                                cls.push('range');
                        }
                        if ($.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.o.startDate !== -Infinity ? this.o.startDate.getUTCFullYear() : -Infinity,
                        startMonth = this.o.startDate !== -Infinity ? this.o.startDate.getUTCMonth() : -Infinity,
                        endYear = this.o.endDate !== Infinity ? this.o.endDate.getUTCFullYear() : Infinity,
                        endMonth = this.o.endDate !== Infinity ? this.o.endDate.getUTCMonth() : Infinity,
                        currentDate = this.date && this.date.valueOf(),
                        tooltip;
                this.picker.find('.datepicker-days thead th.datepicker-switch')
                                        .text(dates[this.o.language].months[month]+' '+year);
                this.picker.find('tfoot th.today')
                                        .text(dates[this.o.language].today)
                                        .toggle(this.o.todayBtn !== false);
                this.picker.find('tfoot th.clear')
                                        .text(dates[this.o.language].clear)
                                        .toggle(this.o.clearBtn !== 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.o.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.o.weekStart) {
                                html.push('<tr>');
                                if(this.o.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.o.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');
                        var before = this.o.beforeShowDay(prevMonth);
                        if (before === undefined)
                                before = {};
                        else if (typeof(before) === 'boolean')
                                before = {enabled: before};
                        else if (typeof(before) === 'string')
                                before = {classes: before};
                        if (before.enabled === false)
                                clsName.push('disabled');
                        if (before.classes)
                                clsName = clsName.concat(before.classes.split(/\s+/));
                        if (before.tooltip)
                                tooltip = before.tooltip;
                        clsName = $.unique(clsName);
                        html.push('<td class="'+clsName.join(' ')+'"' + (tooltip ? ' title="'+tooltip+'"' : '') + '>'+prevMonth.getUTCDate() + '</td>');
                        if (prevMonth.getUTCDay() == this.o.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 ? ' old' : i == 10 ? ' new' : '')+(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.o.startDate !== -Infinity && year <= this.o.startDate.getUTCFullYear() && month <= this.o.startDate.getUTCMonth()) {
                                        this.picker.find('.prev').css({visibility: 'hidden'});
                                } else {
                                        this.picker.find('.prev').css({visibility: 'visible'});
                                }
                                if (this.o.endDate !== Infinity && year >= this.o.endDate.getUTCFullYear() && month >= this.o.endDate.getUTCMonth()) {
                                        this.picker.find('.next').css({visibility: 'hidden'});
                                } else {
                                        this.picker.find('.next').css({visibility: 'visible'});
                                }
                                break;
                        case 1:
                        case 2:
                                if (this.o.startDate !== -Infinity && year <= this.o.startDate.getUTCFullYear()) {
                                        this.picker.find('.prev').css({visibility: 'hidden'});
                                } else {
                                        this.picker.find('.prev').css({visibility: 'visible'});
                                }
                                if (this.o.endDate !== Infinity && year >= this.o.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.o.todayBtn == 'linked' ? null : 'view';
                                                        this._setDate(date, which);
                                                        break;
                                                case 'clear':
                                                        var element;
                                                        if (this.isInput)
                                                                element = this.element;
                                                        else if (this.component)
                                                                element = this.element.find('input');
                                                        if (element)
                                                                element.val("").change();
                                                        this._trigger('changeDate');
                                                        this.update();
                                                        if (this.o.autoclose)
                                                                this.hide();
                                                        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._trigger('changeMonth', this.viewDate);
                                                        if (this.o.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._trigger('changeYear', this.viewDate);
                                                        if (this.o.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 = new Date(date);
                if (!which || which  == 'view')
                        this.viewDate = new Date(date);
                this.fill();
                this.setValue();
                this._trigger('changeDate');
                var element;
                if (this.isInput) {
                        element = this.element;
                } else if (this.component){
                        element = this.element.find('input');
                }
                if (element) {
                        element.change();
                        if (this.o.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.o.startDate && date <= this.o.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.o.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.o.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._trigger('changeDate');
                        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.o.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 = dp.getUTCDate(),
                        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;
        }
};
function opts_from_el(el, prefix){
        // Derive options from element data-attrs
        var data = $(el).data(),
                out = {}, inkey,
                replace = new RegExp('^' + prefix.toLowerCase() + '([A-Z])'),
                prefix = new RegExp('^' + prefix.toLowerCase());
        for (var key in data)
                if (prefix.test(key)){
                        inkey = key.replace(replace, function(_,a){ return a.toLowerCase(); });
                        out[inkey] = data[key];
                }
        return out;
}
function opts_from_locale(lang){
        // Derive options from locale plugins
        var out = {};
        // Check if "de-DE" style date is available, if not language should
        // fallback to 2 letter code eg "de"
        if (!dates[lang]) {
                lang = lang.split('-')[0]
                if (!dates[lang])
                        return;
        }
        var d = dates[lang];
        $.each(locale_opts, function(i,k){
                if (k in d)
                        out[k] = d[k];
        });
        return out;
}
var old = $.fn.datepicker;
$.fn.datepicker = function ( option ) {
        var args = Array.apply(null, arguments);
        args.shift();
        var internal_return,
                this_return;
        this.each(function () {
                var $this = $(this),
                        data = $this.data('datepicker'),
                        options = typeof option == 'object' && option;
                if (!data) {
                        var elopts = opts_from_el(this, 'date'),
                                // Preliminary otions
                                xopts = $.extend({}, defaults, elopts, options),
                                locopts = opts_from_locale(xopts.language),
                                // Options priority: js args, data-attrs, locales, defaults
                                opts = $.extend({}, defaults, locopts, elopts, options);
                        if ($this.is('.input-daterange') || opts.inputs){
                                var ropts = {
                                        inputs: opts.inputs || $this.find('input').toArray()
                                };
                                $this.data('datepicker', (data = new DateRangePicker(this, $.extend(opts, ropts))));
                        }
                        else{
                                $this.data('datepicker', (data = new Datepicker(this, opts)));
                        }
                }
                if (typeof option == 'string' && typeof data[option] == 'function') {
                        internal_return = data[option].apply(data, args);
                        if (internal_return !== undefined)
                                return false;
                }
        });
        if (internal_return !== undefined)
                return internal_return;
        else
                return this;
};
var defaults = $.fn.datepicker.defaults = {
        autoclose: false,
        beforeShowDay: $.noop,
        calendarWeeks: false,
        clearBtn: false,
        daysOfWeekDisabled: [],
        endDate: Infinity,
        forceParse: true,
        format: 'mm/dd/yyyy',
        keyboardNavigation: true,
        language: 'en',
        minViewMode: 0,
        rtl: false,
        startDate: -Infinity,
        startView: 0,
        todayBtn: false,
        todayHighlight: false,
        weekStart: 0
};
var locale_opts = $.fn.datepicker.locale_opts = [
        'format',
        'rtl',
        'weekStart'
];
$.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",
                clear: "Clear"
        }
};
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 (typeof format === 'string')
                        format = DPGlobal.parseFormat(format);
                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){
                                        if (isNaN(d))
                                                return d;
                                        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, _date, s; i<setters_order.length; i++){
                                s = setters_order[i];
                                if (s in parsed && !isNaN(parsed[s])){
                                        _date = new Date(date);
                                        setters_map[s](_date, parsed[s]);
                                        if (!isNaN(_date))
                                                date = _date;
                                }
                        }
                }
                return date;
        },
        formatDate: function(date, format, language){
                if (typeof format === 'string')
                        format = DPGlobal.parseFormat(format);
                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="fa fa-arrow-left"/></th>'+
                                                        '<th colspan="5" class="datepicker-switch"></th>'+
                                                        '<th class="next"><i class="fa fa-arrow-right"/></th>'+
                                                '</tr>'+
                                        '</thead>',
        contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>',
        footTemplate: '<tfoot><tr><th colspan="7" class="today"></th></tr><tr><th colspan="7" class="clear"></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 ));