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32
33/**
34 *  Zebra_DatePicker
35 *
36 *  Zebra_DatePicker is a small, compact and highly configurable date picker plugin for jQuery
37 *
38 *  Read more {@link https://github.com/stefangabos/Zebra_Datepicker/ here}
39 *
40 *  @author     Stefan Gabos <[email protected]>
41 *  @version    1.9.8 (last revision: April 08, 2018)
42 *  @copyright  (c) 2011 - 2018 Stefan Gabos
43 *  @license    http://www.gnu.org/licenses/lgpl-3.0.txt GNU LESSER GENERAL PUBLIC LICENSE
44 *  @package    Zebra_DatePicker
45 */
46(function(factory) {
47
48    'use strict';
49
50    // AMD
51    if (typeof define === 'function' && define.amd) define(['jquery'], factory);
52
53    // CommonJS
54    else if (typeof exports === 'object') factory(require('jquery'));
55
56    // browser globals
57    else factory(jQuery);
58
59}(function($) {
60
61    'use strict';
62
63    $.Zebra_DatePicker = function(element, options) {
64
65        var defaults = {
66
67                //  setting this property to a jQuery element, will result in the date picker being always visible, the indicated
68                //  element being the date picker's container;
69                //
70                //  setting this to boolean TRUE will keep will result in the date picker not closing when selecting a
71                //  date but only when the user clicks outside the date picker.
72                //
73                //  note that when a date format is used that also involves time, this property will be automatically
74                //  set to TRUE!
75                //
76                //  default is FALSE
77                always_visible: false,
78
79                //  by default, the date picker is injected into the <body>; use this property to tell the library to inject
80                //  the date picker into a custom element - useful when you want the date picker to open at a specific position
81                //
82                //  must be a jQuery element
83                //
84                //  default is $('body')
85                container: $('body'),
86
87                //  dates that should have custom classes applied to them
88                //  an object in the form of
89                //  {
90                //      'myclass1': [dates_to_apply_the_custom_class_to],
91                //      'myclass2': [dates_to_apply_the_custom_class_to]
92                //  }
93                //  where "dates_to_apply_the_custom_class_to" is an array of dates in the same format as required for
94                //  "disabled_dates" property.
95                //
96                //  custom classes will be applied *only* in the day picker view and not on month/year views!
97                //  also note that the class name will have the "_disabled" suffix added if the day the class is applied to
98                //  is disabled
99                //
100                //  in order for the styles in your custom classes to be applied, make sure you are using the following syntax:
101                //
102                //  .Zebra_DatePicker .dp_daypicker td.myclass1 { .. }
103                //  .Zebra_DatePicker .dp_daypicker td.myclass1_disabled { .. }
104                //
105                //  default is FALSE, no custom classes
106                custom_classes: false,
107
108                //  days of the week; Sunday to Saturday
109                days: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
110
111                //  by default, the abbreviated name of a day consists of the first 2 letters from the day's full name;
112                //  while this is common for most languages, there are also exceptions for languages like Thai, Loa, Myanmar,
113                //  etc. where this is not correct; for these cases, specify an array with the abbreviations to be used for
114                //  the 7 days of the week; leave it FALSE to use the first 2 letters of a day's name as the abbreviation.
115                //
116                //  default is FALSE
117                days_abbr: false,
118
119                //  the position of the date picker relative to the element it is attached to. note that, regardless of this
120                //  setting, the date picker's position will be automatically adjusted to fit in the viewport, if needed.
121                //
122                //  possible values are "above" and "below"
123                //
124                //  default is "above"
125                default_position: 'above',
126
127                //  direction of the calendar
128                //
129                //  a positive or negative integer: n (a positive integer) creates a future-only calendar beginning at n days
130                //  after today; -n (a negative integer); if n is 0, the calendar has no restrictions. use boolean true for
131                //  a future-only calendar starting with today and use boolean false for a past-only calendar ending today.
132                //
133                //  you may also set this property to an array with two elements in the following combinations:
134                //
135                //  -   first item is boolean TRUE (calendar starts today), an integer > 0 (calendar starts n days after
136                //      today), or a valid date given in the format defined by the "format" attribute, using English for
137                //      month names (calendar starts at the specified date), and the second item is boolean FALSE (the calendar
138                //      has no ending date), an integer > 0 (calendar ends n days after the starting date), or a valid date
139                //      given in the format defined by the "format" attribute, using English for month names, and which occurs
140                //      after the starting date (calendar ends at the specified date)
141                //
142                //  -   first item is boolean FALSE (calendar ends today), an integer < 0 (calendar ends n days before today),
143                //      or a valid date given in the format defined by the "format" attribute, using English for month names
144                //      (calendar ends at the specified date), and the second item is an integer > 0 (calendar ends n days
145                //      before the ending date), or a valid date given in the format defined by the "format" attribute, using
146                //      English for month names  and which occurs before the starting date (calendar starts at the specified
147                //      date)
148                //
149                //  [1, 7] - calendar starts tomorrow and ends seven days after that
150                //  [true, 7] - calendar starts today and ends seven days after that
151                //  ['2013-01-01', false] - calendar starts on January 1st 2013 and has no ending date ("format" is YYYY-MM-DD)
152                //  [false, '2012-01-01'] - calendar ends today and starts on January 1st 2012 ("format" is YYYY-MM-DD)
153                //
154                //  note that "disabled_dates" property will still apply!
155                //
156                //  default is 0 (no restrictions)
157                direction: 0,
158
159                //  an array of disabled dates in the following format: 'day month year weekday' where "weekday" is optional
160                //  and can be 0-6 (Saturday to Sunday); the syntax is similar to cron's syntax: the values are separated by
161                //  spaces and may contain * (asterisk) - (dash) and , (comma) delimiters:
162                //
163                //  ['1 1 2012'] would disable January 1, 2012;
164                //  ['* 1 2012'] would disable all days in January 2012;
165                //  ['1-10 1 2012'] would disable January 1 through 10 in 2012;
166                //  ['1,10 1 2012'] would disable January 1 and 10 in 2012;
167                //  ['1-10,20,22,24 1-3 *'] would disable 1 through 10, plus the 22nd and 24th of January through March for every year;
168                //  ['* * * 0,6'] would disable all Saturdays and 

490         *  Constructor method. Initializes the date picker.
491         *
492         *  @return void
493         */
494        var init = function(update) {
495
496            var
497
498                // the characters that may be present in the date format and that represent days, months, years, hours,
499                // minutes and seconds
500                date_chars = {
501                    days:       ['d', 'j', 'D'],
502                    months:     ['F', 'm', 'M', 'n', 't'],
503                    years:      ['o', 'Y', 'y'],
504                    hours:      ['G', 'g', 'H', 'h'],
505                    minutes:    ['i'],
506                    seconds:    ['s'],
507                    ampm:       ['A', 'a']
508                },
509
510                // some defaults
511                type = null, data, dates, k, l;
512
513            // generate a random ID for each date picker (we'll use this if later a certain date picker is destroyed to
514            // remove related events)
515            // the code is taken from http://stackoverflow.com/a/105074
516            for (k = 0; k < 3; k++) uniqueid += Math.floor((1 + Math.random()) * 0x10000).toString(16);
517
518            // unless we're not just updating settings
519            if (!update) {
520
521                // merge default settings with user-settings (
522                plugin.settings = $.extend({}, defaults, options);
523
524                // preserve some of element's original attributes
525                original_attributes['readonly'] = $element.attr('readonly');
526                original_attributes['style'] = $element.attr('style');
527                original_attributes['padding_left'] = parseInt($element.css('paddingLeft'), 10) || 0;
528                original_attributes['padding_right'] = parseInt($element.css('paddingRight'), 10) || 0;
529
530                // iterate through the element's data attributes (if any)
531                for (data in $element.data())
532
533                    // if data attribute's name starts with "zdp_"
534                    if (data.indexOf('zdp_') === 0) {
535
536                        // remove the "zdp_" prefix
537                        data = data.replace(/^zdp\_/, '');
538
539                        // if such a property exists
540                        if (undefined !== defaults[data])
541
542                            // update the property's value
543                            // (note that for the "pair" property we need to convert the property to an element)
544                            plugin.settings[data] = (data === 'pair' ? $($element.data('zdp_' + data)) : $element.data('zdp_' + data));
545
546                    }
547
548            }
549
550            // if the element should be read-only, set the "readonly" attribute
551            if (plugin.settings.readonly_element) $element.attr('readonly', 'readonly');
552
553            // assume there's no timepicker
554            timepicker_config = false;
555
556            // the views the user can cycle through
557            views = [];
558
559            // determine the views the user can cycle through, depending on the format
560            // that is, if the format doesn't contain the day, the user will be able to cycle only through years and months,
561            // whereas if the format doesn't contain months nor days, the user will only be able to select years
562
563            // iterate through all the character blocks
564            for (type in date_chars)
565
566                // iterate through the characters of each block
567                $.each(date_chars[type], function(index, character) {
568
569                    var i, max;
570
571                    // if current character exists in the "format" property
572                    if (plugin.settings.format.indexOf(character) > -1)
573
574                        // if user can cycle through the "days" view
575                        if (type === 'days') views.push('days');
576
577                        // if user can cycle through the "months" view
578                        else if (type === 'months') views.push('months');
579
580                        // if user can cycle through the "years" view
581                        else if (type === 'years') views.push('years');
582
583                        // if time is available in the date's format
584                        else if (type === 'hours' || type === 'minutes' || type === 'seconds' || type === 'ampm') {
585
586                            // if variable is not yet initialized
587                            if (!timepicker_config) {
588
589                                // initialize the variable now
590                                timepicker_config = {is12hour: false};
591
592                                // users may access the "time" view
593                                views.push('time');
594
595                            }
596
597                            // if hours are available in the date's format
598                            if (type === 'hours') {
599
600                                // selectable hours (12 or 24) depending on the format
601                                if (character === 'g' || character == 'h') {
602
603                                    max = 12;
604
605                                    // set a flag telling that the hour is 12 hour format
606                                    timepicker_config.is12hour = true;
607
608                                } else max = 24;
609
610                                timepicker_config.hours = [];
611
612                                // iterate through valid hours
613                                for (i = (max === 12 ? 1 : 0); i < (max === 12 ? 13 : max); i++)
614
615                                    // and add them to the lookup array if a user-defined list of values doesn't exist, or if the value is in that list
616                                    if (!$.isArray(plugin.settings.enabled_hours) || $.inArray(i, plugin.settings.enabled_hours) > -1) timepicker_config.hours.push(i);
617
618                            // if minutes are available in the date's format
619                            } else if (type === 'minutes') {
620
621                                timepicker_config.minutes = [];
622
623                                // iterate through valid minutes
624                                for (i = 0; i < 60; i++)
625
626                                    // and add them to the lookup array if a user-defined list of values doesn't exist, or if the value is in that list
627                                    if (!$.isArray(plugin.settings.enabled_minutes) || $.inArray(i, plugin.settings.enabled_minutes) > -1) timepicker_config.minutes.push(i);
628
629                            // if seconds are available in the date's format
630                            } else if (type === 'seconds') {
631
632                                timepicker_config.seconds = [];
633
634                                // iterate through valid minutes
635                                for (i = 0; i < 60; i++)
636
637                                    // and add them to the lookup array if a user-defined list of values doesn't exist, or if the value is in that list
638                                    if (!$.isArray(plugin.settings.enabled_seconds) || $.inArray(i, plugin.settings.enabled_seconds) > -1) timepicker_config.seconds.push(i);
639
640                            // if am/pm is available in the date's format
641                            } else
642
643                                // pre-fill the array of selectable seconds
644                                timepicker_config.ampm = ['am', 'pm'];
645
646                        }
647
648                });
649
650            // if invalid format (no days, no months, no years) use the default where the user is able to cycle through
651            // all the views, except time
652            if (views.length === 0) views = ['years', 'months', 'days'];
653
654            // if the starting view is not amongst the views the user can cycle through, set the correct starting view
655            if ($.inArray(plugin.settings.view, views) === -1) plugin.settings.view = views[views.length - 1];
656
657            // parse the rules for disabling dates and turn them into arrays of arrays
658
659            custom_class_names = [];
660            for (k in plugin.settings.custom_classes) if (plugin.settings.custom_classes.hasOwnProperty(k) && custom_class_names.indexOf(k) === -1) custom_class_names.push(k);
661
662            // it's the same logic for preparing the enabled/disable dates, as well as dates that have custom classes
663            for (l = 0; l < 2 + custom_class_names.length; l++) {
664
665                // first time we're doing disabled dates,
666                if (l === 0) dates = plugin.settings.disabled_dates;
667
668                // second time we're doing enabled_dates
669                else if (l === 1) dates = plugin.settings.enabled_dates;
670
671                // otherwise, we're doing dates that will have custom classes
672                else dates = plugin.settings.custom_classes[custom_class_names[l - 2]];
673
674                // if we have a non-empty array
675                if ($.isArray(dates) && dates.length > 0)
676
677                    // iterate through the rules
678                    $.each(dates, function() {
679
680                        // split the values in rule by white space
681                        var rules = this.split(' '), i, j, k, limits;
682
683                        // there can be a maximum of 4 rules (days, months, years and, optionally, day of the week)
684                        for (i = 0; i < 4; i++) {
685
686                            // if one of the values is not available
687                            // replace it with a * (wildcard)
688                            if (!rules[i]) rules[i] = '*';
689
690                            // if rule contains a comma, create a new array by splitting the rule by commas
691                            // if there are no commas create an array containing the rule's string
692                            rules[i] = (rules[i].indexOf(',') > -1 ? rules[i].split(',') : new Array(rules[i]));
693
694                            // iterate through the items in the rule
695                            for (j = 0; j < rules[i].length; j++)
696
697                                // if item contains a dash (defining a range)
698                                if (rules[i][j].indexOf('-') > -1) {
699
700                                    // get the lower and upper limits of the range
701                                    limits = rules[i][j].match(/^([0-9]+)\-([0-9]+)/);
702
703                                    // if range is valid
704                                    if (null !== limits) {
705
706                                        // iterate through the range
707                                        for (k = to_int(limits[1]); k <= to_int(limits[2]); k++)
708
709                                            // if value is not already among the values of the rule
710                                            // add it to the rule
711                                            if ($.inArray(k, rules[i]) === -1) rules[i].push(k + '');
712
713                                        // remove the range indicator
714                                        rules[i].splice(j, 1);
715
716                                    }
717
718                                }
719
720                            // iterate through the items in the rule
721                            // and make sure that numbers are numbers
722                            for (j = 0; j < rules[i].length; j++) rules[i][j] = (isNaN(to_int(rules[i][j])) ? rules[i][j] : to_int(rules[i][j]));
723
724                        }
725
726                        // add to the correct list of processed rules
727                        // first time we're doing disabled dates,
728                        if (l === 0) disabled_dates.push(rules);
729
730                        // second time we're doing enabled_dates
731                        else if (l === 1) enabled_dates.push(rules);
732
733                        // otherwise, we're doing the dates to which custom classes need to be applied
734                        else {
735
736                            if (undefined === custom_classes[custom_class_names[l - 2]]) custom_classes[custom_class_names[l - 2]] = [];
737                            custom_classes[custom_class_names[l - 2]].push(rules);
738
739                        }
740
741                    });
742
743            }
744
745            var
746
747                // cache the current system date
748                date = new Date(),
749
750                // when the date picker's starting date depends on the value of another date picker, this value will be
751                // set by the other date picker
752                // this value will be used as base for all calculations (if not set, will be the same as the current
753                // system date)
754                reference_date = (!plugin.settings.reference_date ? ($element.data('zdp_reference_date') && undefined !== $element.data('zdp_reference_date') ? $element.data('zdp_reference_date') : date) : plugin.settings.reference_date),
755
756                tmp_start_date, tmp_end_date;
757
758            // reset these values here as this method might be called more than once during a date picker's lifetime
759            // (when the selectable dates depend on the values from another date picker)
760            start_date = undefined; end_date = undefined;
761
762            // extract the date parts
763            // also, save the current system month/day/year - we'll use them to highlight the current system date
764            first_selectable_month = reference_date.getMonth();
765            current_system_month = date.getMonth();
766            first_selectable_year = reference_date.getFullYear();
767            current_system_year = date.getFullYear();
768            first_selectable_day = reference_date.getDate();
769            current_system_day = date.getDate();
770
771            // check if the calendar has any restrictions
772
773            // calendar is future-only, starting today
774            // it means we have a starting date (the current system date), but no ending date
775            if (plugin.settings.direction === true) start_date = reference_date;
776
777            // calendar is past only, ending today
778            else if (plugin.settings.direction === false) {
779
780                // it means we have an ending date (the reference date), but no starting date
781                end_date = reference_date;
782
783                // extract the date parts
784                last_selectable_month = end_date.getMonth();
785                last_selectable_year = end_date.getFullYear();
786                last_selectable_day = end_date.getDate();
787
788            } else if (
789
790                // if direction is not given as an array and the value is an integer > 0
791                (!$.isArray(plugin.settings.direction) && is_integer(plugin.settings.direction) && to_int(plugin.settings.direction) > 0) ||
792
793                // or direction is given as an array
794                ($.isArray(plugin.settings.direction) && (
795
796                    // and first entry is a valid date
797                    (tmp_start_date = check_date(plugin.settings.direction[0])) ||
798                    // or a boolean TRUE
799                    plugin.settings.direction[0] === true ||
800                    // or an integer > 0
801                    (is_integer(plugin.settings.direction[0]) && plugin.settings.direction[0] > 0)
802
803                ) && (
804
805                    // and second entry is a valid date
806                    (tmp_end_date = check_date(plugin.settings.direction[1])) ||
807                    // or a boolean FALSE
808                    plugin.settings.direction[1] === false ||
809                    // or integer >= 0
810                    (is_integer(plugin.settings.direction[1]) && plugin.settings.direction[1] >= 0)
811
812                ))
813
814            ) {
815
816                // if an exact starting date was given, use that as a starting date
817                if (tmp_start_date) start_date = tmp_start_date;
818
819                // otherwise
820                else
821
822                    // figure out the starting date
823                    // use the Date object to normalize the date
824                    // for example, 2011 05 33 will be transformed to 2011 06 02
825                    start_date = new Date(
826                        first_selectable_year,
827                        first_selectable_month,
828                        first_selectable_day + (!$.isArray(plugin.settings.direction) ? to_int(plugin.settings.direction) : to_int(plugin.settings.direction[0] === true ? 0 : plugin.settings.direction[0]))
829                    );
830
831                // re-extract the date parts
832                first_selectable_month = start_date.getMonth();
833                first_selectable_year = start_date.getFullYear();
834                first_selectable_day = start_date.getDate();
835
836                // if an exact ending date was given and the date is after the starting date, use that as a ending date
837                if (tmp_end_date && +tmp_end_date >= +start_date) end_date = tmp_end_date;
838
839                // if have information about the ending date
840                else if (!tmp_end_date && plugin.settings.direction[1] !== false && $.isArray(plugin.settings.direction))
841
842                    // figure out the ending date
843                    // use the Date object to normalize the date
844                    // for example, 2011 05 33 will be transformed to 2011 06 02
845                    end_date = new Date(
846                        first_selectable_year,
847                        first_selectable_month,
848                        first_selectable_day + to_int(plugin.settings.direction[1])
849                    );
850
851                // if a valid ending date exists
852                if (end_date) {
853
854                    // extract the date parts
855                    last_selectable_month = end_date.getMonth();
856                    last_selectable_year = end_date.getFullYear();
857                    last_selectable_day = end_date.getDate();
858
859                }
860
861            } else if (
862
863                // if direction is not given as an array and the value is an integer < 0
864                (!$.isArray(plugin.settings.direction) && is_integer(plugin.settings.direction) && to_int(plugin.settings.direction) < 0) ||
865
866                // or direction is given as an array
867                ($.isArray(plugin.settings.direction) && (
868
869                    // and first entry is boolean FALSE
870                    plugin.settings.direction[0] === false ||
871                    // or an integer < 0
872                    (is_integer(plugin.settings.direction[0]) && plugin.settings.direction[0] < 0)
873
874                ) && (
875
876                    // and second entry is a valid date
877                    (tmp_start_date = check_date(plugin.settings.direction[1])) ||
878                    // or an integer >= 0
879                    (is_integer(plugin.settings.direction[1]) && plugin.settings.direction[1] >= 0)
880
881                ))
882
883            ) {
884
885                // figure out the ending date
886                // use the Date object to normalize the date
887                // for example, 2011 05 33 will be transformed to 2011 06 02
888                end_date = new Date(
889                    first_selectable_year,
890                    first_selectable_month,
891                    first_selectable_day + (!$.isArray(plugin.settings.direction) ? to_int(plugin.settings.direction) : to_int(plugin.settings.direction[0] === false ? 0 : plugin.settings.direction[0]))
892                );
893
894                // re-extract the date parts
895                last_selectable_month = end_date.getMonth();
896                last_selectable_year = end_date.getFullYear();
897                last_selectable_day = end_date.getDate();
898
899                // if an exact starting date was given, and the date is before the ending date, use that as a starting date
900                if (tmp_start_date && +tmp_start_date < +end_date) start_date = tmp_start_date;
901
902                // if have information about the starting date
903                else if (!tmp_start_date && $.isArray(plugin.settings.direction))
904
905                    // figure out the staring date
906                    // use the Date object to normalize the date
907                    // for example, 2011 05 33 will be transformed to 2011 06 02
908                    start_date = new Date(
909                        last_selectable_year,
910                        last_selectable_month,
911                        last_selectable_day - to_int(plugin.settings.direction[1])
912                    );
913
914                // if a valid starting date exists
915                if (start_date) {
916
917                    // extract the date parts
918                    first_selectable_month = start_date.getMonth();
919                    first_selectable_year = start_date.getFullYear();
920                    first_selectable_day = start_date.getDate();
921
922                }
923
924            // if there are disabled dates
925            } else if ($.isArray(plugin.settings.disabled_dates) && plugin.settings.disabled_dates.length > 0)
926
927                // iterate through the rules for disabling dates
928                for (var interval in disabled_dates)
929
930                    // only if there is a rule that disables *everything*
931                    if (disabled_dates[interval][0] === '*' && disabled_dates[interval][1] === '*' && disabled_dates[interval][2] === '*' && disabled_dates[interval][3] === '*') {
932
933                        var tmpDates = [];
934
935                        // iterate through the rules for enabling dates
936                        // looking for the minimum/maximum selectable date (if it's the case)
937                        $.each(enabled_dates, function() {
938
939                            var rule = this;
940
941                            // if the rule doesn't apply to all years
942                            if (rule[2][0] !== '*')
943
944                                // format date and store it in our stack
945                                tmpDates.push(parseInt(
946                                    rule[2][0] +
947                                    (rule[1][0] === '*' ? '12' : str_pad(rule[1][0], 2)) +
948                                    (rule[0][0] === '*' ? (rule[1][0] === '*' ? '31' : new Date(rule[2][0], rule[1][0], 0).getDate()) : str_pad(rule[0][0], 2)), 10));
949
950                        });
951
952                        // sort dates ascending
953                        tmpDates.sort();
954
955                        // if we have any rules
956                        if (tmpDates.length > 0) {
957
958                            // get date parts
959                            var matches = (tmpDates[0] + '').match(/([0-9]{4})([0-9]{2})([0-9]{2})/);
960
961                            // assign the date parts to the appropriate variables
962                            first_selectable_year = parseInt(matches[1], 10);

1078                first_selectable_month = date.getMonth();
1079                first_selectable_day = date.getDate();
1080
1081            }
1082
1083            // get the default date, from the element, and check if it represents a valid date, according to the required format
1084            var default_date = check_date($element.val() || (plugin.settings.start_date ? plugin.settings.start_date : ''));
1085
1086            // if there is a default date, date picker is in "strict" mode, and the default date is disabled
1087            if (default_date && plugin.settings.strict && is_disabled(default_date.getFullYear(), default_date.getMonth(), default_date.getDate()))
1088
1089                // clear the value of the parent element
1090                $element.val('');
1091
1092            // updates value for the date picker whose starting date depends on the selected date (if any)
1093            if (!update && (undefined !== start_date || undefined !== default_date))
1094                update_dependent(undefined !== default_date ? default_date : start_date);
1095
1096            // if date picker is not always visible in a container
1097            if (!(plugin.settings.always_visible instanceof jQuery)) {
1098
1099                // if we're just creating the date picker
1100                if (!update) {
1101
1102                    // if a calendar icon should be added to the element the plugin is attached to, create the icon now
1103                    if (plugin.settings.show_icon) {
1104
1105                        // strangely, in Firefox 21+ (or maybe even earlier) input elements have their "display" property
1106                        // set to "inline" instead of "inline-block" as do all the other browsers.
1107                        // because this behavior brakes the positioning of the icon, we'll set the "display" property to
1108                        // "inline-block" before anything else;
1109                        if (browser.name === 'firefox' && $element.is('input[type="text"]') && $element.css('display') === 'inline') $element.css('display', 'inline-block');
1110
1111                        // we create a wrapper for the parent element so that we can later position the icon
1112                        // also, make sure the wrapper inherits positioning properties of the target element
1113                        var marginTop = parseInt($element.css('marginTop'), 10) || 0,
1114                            marginRight = parseInt($element.css('marginRight'), 10) || 0,
1115                            marginBottom = parseInt($element.css('marginBottom'), 10) || 0,
1116                            marginLeft = parseInt($element.css('marginLeft'), 10) || 0,
1117                            icon_wrapper = $('<span class="Zebra_DatePicker_Icon_Wrapper"></span>').css({
1118                                display:        $element.css('display'),
1119                                position:       $element.css('position') === 'static' ? 'relative' : $element.css('position'),
1120                                float:          $element.css('float'),
1121                                top:            $element.css('top'),
1122                                right:          $element.css('right'),
1123                                bottom:         $element.css('bottom'),
1124                                left:           $element.css('left'),
1125                                marginTop:      marginTop < 0 ? marginTop : 0,
1126                                marginRight:    marginRight < 0 ? marginRight : 0,
1127                                marginBottom:   marginBottom < 0 ? marginBottom : 0,
1128                                marginLeft:     marginLeft < 0 ? marginLeft : 0,
1129                                paddingTop:     marginTop,
1130                                paddingRight:   marginRight,
1131                                paddingBottom:  marginBottom,
1132                                paddingLeft:    marginLeft
1133                            });
1134
1135                        // if parent element has its "display" property set to "block"
1136                        // the wrapper has to have its "width" set
1137                        if ($element.css('display') === 'block') icon_wrapper.css('width', $element.outerWidth(true));
1138
1139                        // put wrapper around the element
1140                        // also, reset the target element's positioning properties
1141                        $element.wrap(icon_wrapper).css({
1142                            position:       'relative',
1143                            float:          'none',
1144                            top:            'auto',
1145                            right:          'auto',
1146                            bottom:         'auto',
1147                            left:           'auto',
1148                            marginTop:      0,
1149                            marginRight:    0,
1150                            marginBottom:   0,
1151                            marginLeft:     0
1152                        });
1153
1154                        // create the actual calendar icon (show a disabled icon if the element is disabled)
1155                        icon = $('<button type="button" class="Zebra_DatePicker_Icon' + ($element.attr('disabled') === 'disabled' ? ' Zebra_DatePicker_Icon_Disabled' : '') + '">Pick a date</button>');
1156
1157                        // a reference to the icon, as a global property
1158                        plugin.icon = icon;
1159
1160                        // the date picker will open when clicking both the icon and the element the plugin is attached to
1161                        // (or the icon only, if set so)
1162                        clickables = plugin.settings.open_icon_only ? icon : icon.add($element);
1163
1164                    // if calendar icon is not visible, the date picker will open when clicking the element
1165                    } else clickables = $element;
1166
1167                    // attach the "click" and, if required, the "focus" event to the clickable elements (icon and/or element)
1168                    clickables.on('click.Zebra_DatePicker_' + uniqueid + (plugin.settings.open_on_focus ? ' focus.Zebra_DatePicker_' + uniqueid : ''), function() {
1169
1170                        // if date picker is not visible and element is not disabled
1171                        if (datepicker.hasClass('dp_hidden') && !$element.attr('disabled'))
1172
1173                            // show the date picker
1174                            setTimeout(function() {
1175                                plugin.show();
1176                            }, (
1177                                // for touch-enabled devices when element is not readonly, wait for 600 miliseconds for
1178                                // the virtual keyboard to appear and show the date picker afterwards
1179                                is_touch && !plugin.settings.readonly_element ? 600 : 0
1180                            ));
1181
1182                    });
1183
1184                    // attach a keydown event to the clickable elements (icon and/or element)
1185                    clickables.on('keydown.Zebra_DatePicker_' + uniqueid, function(e) {
1186
1187                        // if "Tab" key was pressed and the date picker is visible
1188                        if (e.keyCode === 9 && !datepicker.hasClass('dp_hidden'))
1189
1190                            // hide the date picker
1191                            plugin.hide();
1192
1193                    });
1194
1195                    // if users can manually enter dates and a pair date element exists
1196                    if (!plugin.settings.readonly_element && plugin.settings.pair)
1197
1198                        // whenever the element looses focus
1199                        $element.on('blur.Zebra_DatePicker_' + uniqueid, function() {
1200
1201                            var date;
1202
1203                            // if a valid date was entered, update the paired date picker
1204                            if ((date = check_date($(this).val())) && !is_disabled(date.getFullYear(), date.getMonth(), date.getDate())) update_dependent(date);
1205
1206                        });
1207
1208                    // if icon exists, inject it into the DOM, right after the parent element (and inside the wrapper)
1209                    if (undefined !== icon) icon.insertAfter($element);
1210
1211                }
1212
1213                // if calendar icon exists
1214                if (undefined !== icon) {
1215
1216                    // needed when updating: remove any inline style set previously by library,
1217                    // so we get the right values below
1218                    icon.attr('style', '');
1219
1220                    var
1221
1222                        // get element's width and height (including margins)
1223                        element_width = $element.outerWidth(),
1224                        element_height = $element.outerHeight(),
1225
1226                        // get icon's width, height and margins
1227                        icon_width = icon.outerWidth(),
1228                        icon_height = icon.outerHeight();
1229
1230                    // set icon's vertical position
1231                    icon.css('top', (element_height - icon_height) / 2);
1232
1233                    // if icon is to be placed *inside* the element
1234                    // position the icon accordingly
1235                    if (plugin.settings.inside)
1236
1237                        // if icon is to be placed on the right
1238                        if (plugin.settings.icon_position === 'right') {
1239
1240                            // place the icon to the right, respecting the element's right padding
1241                            icon.css('right', plugin.settings.icon_margin !== false ? plugin.settings.icon_margin : original_attributes['padding_right']);
1242
1243                            // also, adjust the element's right padding
1244                            $element.css('paddingRight', ((plugin.settings.icon_margin !== false ? plugin.settings.icon_margin : original_attributes['padding_right']) * 2) + icon_width);
1245
1246                        // if icon is to be placed on the left
1247                        } else {
1248
1249                            // place the icon to the left, respecting the element's left padding
1250                            icon.css('left', plugin.settings.icon_margin !== false ? plugin.settings.icon_margin : original_attributes['padding_left']);
1251
1252                            // also, adjust the element's left padding
1253                            $element.css('paddingLeft', ((plugin.settings.icon_margin !== false ? plugin.settings.icon_margin : original_attributes['padding_left']) * 2) + icon_width);
1254
1255                        }
1256
1257                    // if icon is to be placed to the right of the element
1258                    // position the icon accordingly
1259                    else icon.css('left', element_width + (plugin.settings.icon_margin !== false ? plugin.settings.icon_margin : original_attributes['padding_left']));
1260
1261                    // assume the datepicker is not disabled
1262                    icon.removeClass('Zebra_DatePicker_Icon_Disabled');
1263
1264                    // if element the datepicker is attached to became disabled, disable the calendar icon, too
1265                    if ($element.attr('disabled') === 'disabled') icon.addClass('Zebra_DatePicker_Icon_Disabled');
1266
1267                }
1268
1269            }
1270
1271            // if the "Today" button is to be shown and it makes sense to be shown
1272            // (the "days" view is available and "today" is not a disabled date)
1273            show_select_today = (plugin.settings.show_select_today !== false && $.inArray('days', views) > -1 && !is_disabled(current_system_year, current_system_month, current_system_day) ? plugin.settings.show_select_today : false);
1274
1275            // if we just needed to recompute the things above
1276            if (update) {
1277
1278                // make sure we update these strings, in case they've changed
1279                $('.dp_previous', datepicker).html(plugin.settings.navigation[0]);
1280                $('.dp_next', datepicker).html(plugin.settings.navigation[1]);
1281                $('.dp_time_controls_increase .dp_time_control', datepicker).html(plugin.settings.navigation[2]);
1282                $('.dp_time_controls_decrease .dp_time_control', datepicker).html(plugin.settings.navigation[3]);
1283                $('.dp_clear', datepicker).html(plugin.settings.lang_clear_date);
1284                $('.dp_today', datepicker).html(plugin.settings.show_select_today);
1285
1286                // don't go further
1287                return;
1288
1289            }
1290
1291            // update icon/date picker position on resize and/or changing orientation
1292            $(window).on('resize.Zebra_DatePicker_' + uniqueid + ', orientationchange.Zebra_DatePicker_' + uniqueid, function() {
1293
1294                // hide the date picker
1295                plugin.hide();
1296
1297            });
1298
1299            // generate the container that will hold everything
1300            var html = '' +
1301                '<div class="Zebra_DatePicker">' +
1302                    '<table class="dp_header dp_actions">' +
1303                        '<tr>' +
1304                            '<td class="dp_previous">' + plugin.settings.navigation[0] + (is_iOS ? '&#xFE0E;' : '') + '</td>' +
1305                            '<td class="dp_caption"></td>' +
1306                            '<td class="dp_next">' + plugin.settings.navigation[1] + (is_iOS ? '&#xFE0E;' : '') + '</td>' +
1307                        '</tr>' +
1308                    '</table>' +
1309                    '<table class="dp_daypicker' + (plugin.settings.show_week_number ? ' dp_week_numbers' : '') + ' dp_body"></table>' +
1310                    '<table class="dp_monthpicker dp_body"></table>' +
1311                    '<table class="dp_yearpicker dp_body"></table>' +
1312                    '<table class="dp_timepicker dp_body"></table>' +
1313                    '<table class="dp_footer dp_actions"><tr>' +
1314                        '<td class="dp_today">' + show_select_today + '</td>' +
1315                        '<td class="dp_clear">' + plugin.settings.lang_clear_date + '</td>' +
1316                        '<td class="dp_view_toggler dp_icon">&nbsp;&nbsp;&nbsp;&nbsp;</td>' +
1317                        '<td class="dp_confirm dp_icon"></td>' +
1318                    '</tr></table>' +
1319                '</div>';
1320
1321            // create a jQuery object out of the HTML above and create a reference to it
1322            datepicker = $(html);
1323
1324            // create references to the different parts of the date picker
1325            header = $('table.dp_header', datepicker);
1326            daypicker = $('table.dp_daypicker', datepicker);
1327            monthpicker = $('table.dp_monthpicker', datepicker);
1328            yearpicker = $('table.dp_yearpicker', datepicker);
1329            timepicker = $('table.dp_timepicker', datepicker);
1330            footer = $('table.dp_footer', datepicker);
1331            selecttoday = $('td.dp_today', footer);
1332            cleardate = $('td.dp_clear', footer);
1333            view_toggler = $('td.dp_view_toggler', footer);
1334            confirm_selection = $('td.dp_confirm', footer);
1335
1336            // if date picker is not always visible in a container
1337            if (!(plugin.settings.always_visible instanceof jQuery))
1338
1339                // inject the container into the DOM
1340                plugin.settings.container.append(datepicker);
1341
1342            // otherwise, if element is not disabled
1343            else if (!$element.attr('disabled')) {
1344
1345                // inject the date picker into the designated container element
1346                plugin.settings.always_visible.append(datepicker);
1347
1348                // and make it visible right away
1349                plugin.show();
1350
1351            }
1352
1353            // add the mouseover/mousevents to all to the date picker's cells
1354            // except those that are not selectable
1355            datepicker
1356                .on('mouseover', 'td:not(.dp_disabled)', function() {
1357                    $(this).addClass('dp_hover');
1358                })
1359                .on('mouseout', 'td:not(.dp_disabled)', function() {
1360                    $(this).removeClass('dp_hover');
1361                });
1362
1363            // prevent text selection (prevent accidental select when user clicks too fast)
1364            disable_text_select(datepicker);
1365
1366            // event for when clicking the "previous" button
1367            $('.dp_previous', header).on('click', function() {
1368
1369                // if view is "months"
1370                // decrement year by one
1371                if (view === 'months') selected_year--;
1372
1373                // if view is "years"
1374                // decrement years by 12
1375                else if (view === 'years') selected_year -= 12;
1376
1377                // if view is "days"
1378                // decrement the month and
1379                // if month is out of range
1380                else if (--selected_month < 0) {
1381
1382                    // go to the last month of the previous year
1383                    selected_month = 11;
1384                    selected_year--;
1385
1386                }
1387
1388                // generate the appropriate view
1389                manage_views();
1390
1391            });
1392
1393            // attach a click event to the caption in header
1394            $('.dp_caption', header).on('click', function() {
1395
1396                // if current view is "days", take the user to the next view, depending on the format
1397                if (view === 'days') view = ($.inArray('months', views) > -1 ? 'months' : ($.inArray('years', views) > -1 ? 'years' : 'days'));
1398
1399                // if current view is "months", take the user to the next view, depending on the format
1400                else if (view === 'months') view = ($.inArray('years', views) > -1 ? 'years' : ($.inArray('days', views) > -1 ? 'days' : 'months'));
1401
1402                // if current view is "years", take the user to the next view, depending on the format
1403                else view = ($.inArray('days', views) > -1 ? 'days' : ($.inArray('months', views) > -1 ? 'months' : 'years'));
1404
1405                // generate the appropriate view
1406                manage_views();
1407
1408            });
1409
1410            // event for when clicking the "next" button
1411            $('.dp_next', header).on('click', function() {
1412
1413                // if view is "months"
1414                // increment year by 1
1415                if (view === 'months') selected_year++;
1416
1417                // if view is "years"
1418                // increment years by 12
1419                else if (view === 'years') selected_year += 12;
1420
1421                // if view is "days"
1422                // increment the month and
1423                // if month is out of range
1424                else if (++selected_month === 12) {
1425
1426                    // go to the first month of the next year
1427                    selected_month = 0;
1428                    selected_year++;
1429
1430                }
1431
1432                // generate the appropriate view
1433                manage_views();
1434
1435            });
1436
1437            // attach a click event for the cells in the day picker
1438            daypicker.on('click', 'td:not(.dp_disabled)', function() {
1439
1440                var matches;
1441
1442                // if other months are selectable and currently clicked cell contains a class with the cell's date
1443                if (plugin.settings.select_other_months && $(this).attr('class') && null !== (matches = $(this).attr('class').match(/date\_([0-9]{4})(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01])/)))
1444
1445                    // use the stored date
1446                    select_date(matches[1], matches[2] - 1, matches[3], 'days', $(this));
1447
1448                // put selected date in the element the plugin is attached to, and hide the date picker
1449                else select_date(selected_year, selected_month, to_int($(this).html()), 'days', $(this));
1450
1451            });
1452
1453            // attach a click event for the cells in the month picker
1454            monthpicker.on('click', 'td:not(.dp_disabled)', function() {
1455
1456                // get the month we've clicked on
1457                var matches = $(this).attr('class').match(/dp\_month\_([0-9]+)/);
1458
1459                // set the selected month
1460                selected_month = to_int(matches[1]);
1461
1462                // if user can select only years and months
1463                if ($.inArray('days', views) === -1)
1464
1465                    // put selected date in the element the plugin is attached to, and hide the date picker
1466                    select_date(selected_year, selected_month, 1, 'months', $(this));
1467
1468                else {
1469
1470                    // direct the user to the "days" view
1471                    view = 'days';
1472
1473                    // if date picker is always visible
1474                    // empty the value in the text box the date picker is attached to
1475                    if (plugin.settings.always_visible) $element.val('');
1476
1477                    // generate the appropriate view
1478                    manage_views();
1479
1480                }
1481
1482            });
1483
1484            // attach a click event for the cells in the year picker
1485            yearpicker.on('click', 'td:not(.dp_disabled)', function() {
1486
1487                // set the selected year
1488                selected_year = to_int($(this).html());
1489
1490                // if user can select only years
1491                if ($.inArray('months', views) === -1)
1492
1493                    // put selected date in the element the plugin is attached to, and hide the date picker
1494                    select_date(selected_year, 1, 1, 'years', $(this));
1495
1496                else {
1497
1498                    // direct the user to the "months" view
1499                    view = 'months';
1500
1501                    // if date picker is always visible
1502                    // empty the value in the text box the date picker is attached to
1503                    if (plugin.settings.always_visible) $element.val('');
1504
1505                    // generate the appropriate view
1506                    manage_views();
1507
1508                }
1509
1510            });
1511
1512            // function to execute when the "Today" button is clicked
1513            selecttoday.on('click', function(e) {
1514
1515                // date might have changed since we opened the date picker, so always use the current date
1516                var date = new Date;
1517
1518                e.preventDefault();
1519
1520                // select the current date
1521                select_date(date.getFullYear(), date.getMonth(), date.getDate(), 'days', $('.dp_current', daypicker));
1522
1523            });
1524
1525            // function to execute when the "Clear" button is clicked
1526            cleardate.on('click', function(e) {
1527
1528                e.preventDefault();
1529
1530                // clear the element's value
1531                $element.val('');
1532
1533                // reset these values
1534                default_day = null; default_month = null; default_year = null;
1535
1536                // if date picker is not always visible
1537                if (!plugin.settings.always_visible) {
1538
1539                    // reset these values
1540                    selected_month = null; selected_year = null;
1541
1542                // if date picker is always visible
1543                } else
1544
1545                    // remove the "selected" class from all cells that have it
1546                    $('td.dp_selected', datepicker).removeClass('dp_selected');
1547
1548                // give the focus back to the parent element
1549                $element.focus();
1550
1551                // hide the date picker
1552                plugin.hide();
1553
1554                // if a callback function exists for when clearing a date
1555                if (plugin.settings.onClear && typeof plugin.settings.onClear === 'function')
1556
1557                    // execute the callback function and pass as argument the element the plugin is attached to
1558                    plugin.settings.onClear.call($element);
1559
1560            });
1561
1562            // function to execute when the clock/calendar button is clicked in the footer
1563            view_toggler.on('click', function() {
1564
1565                // if we're not in the time picker mode
1566                if (view !== 'time') {
1567
1568                    // switch to time picker mode
1569                    view = 'time';
1570                    manage_views();
1571
1572                // if we are already in the time picker mode,
1573                // switch back to the standard view
1574                // (let the click on the header's caption handle things)
1575                } else $('.dp_caption', header).trigger('click');
1576
1577            });
1578
1579            // when the "confirm selection" button is clicked, hide the date picker
1580            // (visible only when in the "time" view)
1581            confirm_selection.on('click', function() {
1582
1583                // as users may click this before making any adjustments to time, simulate time adjustment so that
1584                // a value is selected
1585                $('.dp_time_controls_increase td').trigger('click');
1586                $('.dp_time_controls_decrease td').trigger('click');
1587
1588                // if a callback function exists for when selecting a date
1589                if (plugin.settings.onSelect && typeof plugin.settings.onSelect === 'function') {
1590
1591                    var js_date = new Date(selected_year, selected_month, default_day,
1592                        (timepicker_config && timepicker_config.hours ? selected_hour + (timepicker_config.ampm && ((selected_ampm === 'pm' && selected_hour < 12) || (selected_ampm === 'am' && selected_hour === 12)) ? 12 : 0) : 0),
1593                        (timepicker_config && timepicker_config.minutes ? selected_minute : 0),
1594                        (timepicker_config && timepicker_config.seconds ? selected_second : 0)
1595                    );
1596
1597                    // execute the callback function
1598                    // make "this" inside the callback function refer to the element the date picker is attached to, as a jQuery object
1599                    plugin.settings.onSelect.call($element, format(js_date), selected_year + '-' + str_pad(selected_month + 1, 2) + '-' + str_pad(default_day, 2) + (timepicker_config ? ' ' + str_pad(js_date.getHours(), 2) + ':' + str_pad(js_date.getMinutes(), 2) + ':' + str_pad(js_date.getSeconds(), 2) : ''), js_date);
1600
1601                }
1602
1603                plugin.hide();
1604
1605            });
1606
1607            // handle value increases on the time picker
1608            datepicker.on('click', '.dp_time_controls_increase td, .dp_time_controls_decrease td', function() {
1609
1610                var
1611
1612                    // are we increasing or decreasing values?
1613                    increase = $(this).parent('.dp_time_controls_increase').length > 0,
1614
1615                    // figure out what we're increasing (hour, minutes, seconds, ampm)
1616                    matches = $(this).attr('class').match(/dp\_time\_([^\s]+)/i),
1617                    value_container = $('.dp_time_segments .dp_time_' + matches[1] + (matches[1] !== 'ampm' ? 's' : ''), timepicker),
1618
1619                    // the current value (strip the zeros in front)
1620                    value = value_container.text().toLowerCase(),
1621
1622                    // the array with allowed values
1623                    lookup = timepicker_config[matches[1] + (matches[1] !== 'ampm' ? 's' : '')],
1624
1625                    // the current value's position in the array of allowed values
1626                    current_value_position = $.inArray(matches[1] !== 'ampm' ? parseInt(value, 10) : value, lookup),
1627
1628                    // the next value's position in the lookup array
1629                    next_value_position = current_value_position === -1 ? 0 : (increase ? (current_value_position + 1 >= lookup.length ? 0 : current_value_position + 1) : (current_value_position - 1 < 0 ? lookup.length - 1 : current_value_position - 1)),
1630
1631                    default_date;
1632
1633                // increase/decrease the required value according to the values in the lookup array
1634                if (matches[1] === 'hour') selected_hour = lookup[next_value_position];
1635                else if (matches[1] === 'minute') selected_minute = lookup[next_value_position];
1636                else if (matches[1] === 'second') selected_second = lookup[next_value_position];
1637                else selected_ampm = lookup[next_value_position];
1638
1639                // if a default day is not available and the "start_date" property is set
1640                if (!default_day && plugin.settings.start_date) {
1641
1642                    // check if "start_date" is valid according to the format
1643                    default_date = check_date(plugin.settings.start_date);
1644
1645                    // ...and if it is, extract the day from there
1646                    if (default_date) default_day = default_date.getDate();
1647
1648                }
1649
1650                // if still no value, use the first selectable day
1651                if (!default_day) default_day = first_selectable_day;
1652
1653                // set the new value
1654                value_container.text(str_pad(lookup[next_value_position], 2).toUpperCase());
1655
1656                // update the value in the element
1657                select_date(selected_year, selected_month, default_day);
1658
1659            });
1660
1661            // if date picker is not always visible in a container
1662            if (!(plugin.settings.always_visible instanceof jQuery)) {
1663
1664                // if we dragged the screen
1665                $(document).on('touchmove.Zebra_DatePicker_' + uniqueid, function() {
1666
1667                    // set this flag to TRUE
1668                    touchmove = true;
1669
1670                });
1671
1672                // whenever anything is clicked on the page
1673                $(document).on('mousedown.Zebra_DatePicker_' + uniqueid + ' touchend.Zebra_DatePicker_' + uniqueid, function(e) {
1674
1675                    // if this happened on a touch-enabled device and it represents the end of finger movement instead of a tap
1676                    // set the "touchmove" flag to FALSE and don't go further
1677                    if (e.type === 'touchend' && touchmove) {
1678
1679                        // we now know that this is a touch enabled device
1680                        is_touch = true;
1681
1682                        return (touchmove = false);
1683
1684                    }
1685
1686                    // always set this to FALSE here
1687                    touchmove = false;
1688
1689                    // if
1690                    if (
1691
1692                        // date picker is visible
1693                        !datepicker.hasClass('dp_hidden') &&
1694
1695                        (
1696                            // date picker opens only on interacting with the icon, icon exists, but it is not the clicked element
1697                            (plugin.settings.open_icon_only && plugin.icon && $(e.target).get(0) !== plugin.icon.get(0)) ||
1698
1699                            // date picker doesn't open only on interacting with the icon but the clicked element it's not the icon nor the parent element
1700                            (!plugin.settings.open_icon_only && $(e.target).get(0) !== $element.get(0) && (!plugin.icon || $(e.target).get(0) !== plugin.icon.get(0)))
1701
1702                        ) &&
1703
1704                        // and the click is not inside the calendar
1705                        $(e.target).parents().filter('.Zebra_DatePicker').length === 0
1706
1707                    // hide the date picker
1708                    ) plugin.hide(true);
1709
1710                });
1711
1712                // whenever a key is pressed on the page
1713                $(document).on('keyup.Zebra_DatePicker_' + uniqueid, function(e) {
1714
1715                    // if the date picker is visible
1716                    // and the pressed key is ESC
1717                    // hide the date picker
1718                    if (!datepicker.hasClass('dp_hidden') && e.which === 27) plugin.hide();
1719
1720                });
1721
1722            }
1723
1724            // last thing is to pre-render some of the date picker right away
1725            manage_views();
1726
1727        };
1728
1729        /**
1730         *  Clears the selected date.
1731         *
1732         *  @return void
1733         */
1734        plugin.clear_date = function() {
1735
1736            $(cleardate).trigger('click');
1737
1738        };
1739
1740        /**
1741         *  Destroys the date picker.
1742         *
1743         *  @return void
1744         */
1745        plugin.destroy = function() {
1746
1747            // if the calendar icon exists
1748            if (undefined !== plugin.icon) {
1749
1750                // remove associated event handlers
1751                plugin.icon.off('click.Zebra_DatePicker_' + uniqueid);
1752                plugin.icon.off('focus.Zebra_DatePicker_' + uniqueid);
1753                plugin.icon.off('keydown.Zebra_DatePicker_' + uniqueid);
1754
1755                // remove the icon itself
1756                plugin.icon.remove();
1757
1758            }
1759
1760            // remove all events attached to the datepicker
1761            // (these are the ones for increasing/decreasing values in the time picker)
1762            datepicker.off();
1763
1764            // remove the calendar
1765            datepicker.remove();
1766
1767            // if calendar icon was shown and the date picker was not always visible in a container,
1768            // also remove the wrapper used for positioning it
1769            if (plugin.settings.show_icon && !(plugin.settings.always_visible instanceof jQuery)) $element.unwrap();
1770
1771            // remove associated event handlers from the element
1772            $element.off('blur.Zebra_DatePicker_' + uniqueid);
1773            $element.off('click.Zebra_DatePicker_' + uniqueid);
1774            $element.off('focus.Zebra_DatePicker_' + uniqueid);
1775            $element.off('keydown.Zebra_DatePicker_' + uniqueid);
1776            $element.off('mousedown.Zebra_DatePicker_' + uniqueid);
1777
1778            // remove associated event handlers from the document
1779            $(document).off('keyup.Zebra_DatePicker_' + uniqueid);
1780            $(document).off('mousedown.Zebra_DatePicker_' + uniqueid);
1781            $(document).off('touchend.Zebra_DatePicker_' + uniqueid);
1782            $(window).off('resize.Zebra_DatePicker_' + uniqueid);
1783            $(window).off('orientationchange.Zebra_DatePicker_' + uniqueid);
1784
1785            // remove association with the element
1786            $element.removeData('Zebra_DatePicker');
1787
1788            // restore element's modified attributes
1789            $element.attr('readonly', original_attributes['readonly']);
1790            $element.attr('style', original_attributes['style'] ? original_attributes['style'] : '');
1791            $element.css('paddingLeft', original_attributes['padding_left']);
1792            $element.css('paddingRight', original_attributes['padding_right']);
1793
1794        };
1795
1796        /**
1797         *  Hides the date picker.
1798         *
1799         *  @return void
1800         */
1801        plugin.hide = function(outside) {
1802
1803            // if date picker is not always visible or we clicked outside the date picker
1804            // (the "outside" argument is TRUE when clicking outside the date picker and the "always_visible" is set to boolean TRUE)
1805            if (!plugin.settings.always_visible || outside) {
1806
1807                // hide the iFrameShim in Internet Explorer 6
1808                iframeShim('hide');
1809
1810                // hide the date picker
1811                datepicker.addClass('dp_hidden');
1812
1813                // if a callback function exists for when hiding the date picker
1814                if (plugin.settings.onClose && typeof plugin.settings.onClose === 'function')
1815
1816                    // execute the callback function and pass as argument the element the plugin is attached to
1817                    plugin.settings.onClose.call($element);
1818
1819            }
1820
1821        };
1822
1823        /**
1824         *  Set the date picker's value
1825         *
1826         *  Must be in the format set by the "format" property!
1827         *
1828         *  @return void
1829         */
1830        plugin.set_date = function(date) {
1831
1832            var dateObj;
1833
1834            // if a valid date was entered, and date is not disabled
1835            if ((dateObj = check_date(date)) && !is_disabled(dateObj.getFullYear(), dateObj.getMonth(), dateObj.getDate())) {
1836
1837                // set the element's value
1838                $element.val(date);
1839
1840                // update the paired date picker (if any)
1841                update_dependent(dateObj);
1842
1843            }
1844
1845        };
1846
1847        /**
1848         *  Shows the date picker.
1849         *
1850         *  @return void
1851         */
1852        plugin.show = function() {
1853
1854            // always show the view defined in settings
1855            view = plugin.settings.view;
1856
1857            // get the default date, from the element, and check if it represents a valid date, according to the required format
1858            var default_date = check_date($element.val() || (plugin.settings.start_date ? plugin.settings.start_date : '')),
1859                current_date;
1860
1861            // if the value represents a valid date
1862            if (default_date) {
1863
1864                // extract the date parts
1865                // we'll use these to highlight the default date in the date picker and as starting point to
1866                // what year and month to start the date picker with
1867                // why separate values? because selected_* will change as user navigates within the date picker
1868                default_month = default_date.getMonth();
1869                selected_month = default_date.getMonth();
1870                default_year = default_date.getFullYear();
1871                selected_year = default_date.getFullYear();
1872                default_day = default_date.getDate();
1873
1874                // if the default date represents a disabled date
1875                if (is_disabled(default_year, default_month, default_day)) {
1876
1877                    // if date picker is in "strict" mode, clear the value of the parent element
1878                    if (plugin.settings.strict) $element.val('');
1879
1880                    // the calendar will start with the first selectable year/month
1881                    selected_month = first_selectable_month;
1882                    selected_year = first_selectable_year;
1883
1884                }
1885
1886            // if a default value is not available, or value does not represent a valid date
1887            } else {
1888
1889                // the calendar will start with the first selectable year/month
1890                selected_month = first_selectable_month;
1891                selected_year = first_selectable_year;
1892
1893            }
1894
1895            // whatever the case, if time picker is enabled
1896            if (timepicker_config) {
1897
1898                // if a default date is available, use the time from there
1899                if (default_date) current_date = default_date;
1900
1901                // use current system time otherwise
1902                else current_date = new Date();
1903
1904                // extract time parts from it
1905                selected_hour = current_date.getHours();
1906                selected_minute = current_date.getMinutes();
1907                selected_second = current_date.getSeconds();
1908                selected_ampm = (selected_hour >= 12 ? 'pm' : 'am');
1909

1998         *  @param  object  values  An object containing any number of configuration options to be updated
1999         *
2000         *  @return void
2001         */
2002        plugin.update = function(values) {
2003
2004            // if original direction not saved, save it now
2005            if (plugin.original_direction) plugin.original_direction = plugin.direction;
2006
2007            // update configuration options
2008            plugin.settings = $.extend(plugin.settings, values);
2009
2010            // reinitialize the object with the new options
2011            init(true);
2012
2013        };
2014
2015        /**
2016         *  Checks if a string represents a valid date according to the format defined by the "format" property.
2017         *
2018         *  @param  string  str_date    A string representing a date, formatted accordingly to the "format" property.
2019         *                              For example, if "format" is "Y-m-d" the string should look like "2011-06-01"
2020         *
2021         *  @return mixed               Returns a JavaScript Date object if string represents a valid date according
2022         *                              formatted according to the "format" property, or FALSE otherwise.
2023         *
2024         *  @access private
2025         */
2026        var check_date = function(str_date) {
2027
2028            // treat argument as a string
2029            str_date += '';
2030
2031            // if value is given
2032            if ($.trim(str_date) !== '') {
2033
2034                var
2035
2036                    // prepare the format by removing white space from it
2037                    // and also escape characters that could have special meaning in a regular expression
2038                    format = escape_regexp(plugin.settings.format),
2039
2040                    // allowed characters in date's format
2041                    format_chars = ['d', 'D', 'j', 'l', 'N', 'S', 'w', 'F', 'm', 'M', 'n', 'Y', 'y', 'G', 'g', 'H', 'h', 'i', 's', 'a', 'A'],
2042
2043                    // "matches" will contain the characters defining the date's format
2044                    matches = [],
2045
2046                    // "regexp" will contain the regular expression built for each of the characters used in the date's format
2047                    regexp = [],
2048
2049                    // "position" will contain the position of the character found in the date's format
2050                    position = null,
2051
2052                    // "segments" will contain the matches of the regular expression
2053                    segments = null;
2054
2055                // iterate through the allowed characters in date's format
2056                for (var i = 0; i < format_chars.length; i++)
2057
2058                    // if character is found in the date's format
2059                    if ((position = format.indexOf(format_chars[i])) > -1)
2060
2061                        // save it, alongside the character's position
2062                        matches.push({
2063                            character: format_chars[i],
2064                            position: position
2065                        });
2066
2067                // sort characters defining the date's format based on their position, ascending
2068                matches.sort(function(a, b) { return a.position - b.position; });
2069
2070                // iterate through the characters defining the date's format
2071                $.each(matches, function(index, match) {
2072
2073                    // add to the array of regular expressions, based on the character
2074                    switch (match.character) {
2075
2076                        case 'd': regexp.push('0[1-9]|[12][0-9]|3[01]'); break;
2077                        case 'D': regexp.push('[a-z]{3}'); break;
2078                        case 'j': regexp.push('[1-9]|[12][0-9]|3[01]'); break;
2079                        case 'l': regexp.push('[a-z]+'); break;
2080                        case 'N': regexp.push('[1-7]'); break;
2081                        case 'S': regexp.push('st|nd|rd|th'); break;
2082                        case 'w': regexp.push('[0-6]'); break;
2083                        case 'F': regexp.push('[a-z]+'); break;
2084                        case 'm': regexp.push('0[1-9]|1[012]'); break;
2085                        case 'M': regexp.push('[a-z]{3}'); break;
2086                        case 'n': regexp.push('[1-9]|1[012]'); break;
2087                        case 'Y': regexp.push('[0-9]{4}'); break;
2088                        case 'y': regexp.push('[0-9]{2}'); break;
2089                        case 'G': regexp.push('[1-9]|1[0-9]|2[0123]'); break;
2090                        case 'g': regexp.push('[0-9]|1[012]'); break;
2091                        case 'H': regexp.push('0[0-9]|1[0-9]|2[0123]'); break;
2092                        case 'h': regexp.push('0[0-9]|1[012]'); break;
2093                        case 'i': regexp.push('0[0-9]|[12345][0-9]'); break;
2094                        case 's': regexp.push('0[0-9]|[12345][0-9]'); break;
2095                        case 'a': regexp.push('am|pm'); break;
2096                        case 'A': regexp.push('AM|PM'); break;
2097
2098                    }
2099
2100                });
2101
2102                // if we have an array of regular expressions
2103                if (regexp.length) {
2104
2105                    // we will replace characters in the date's format in reversed order
2106                    matches.reverse();
2107
2108                    // iterate through the characters in date's format
2109                    $.each(matches, function(index, match) {
2110
2111                        // replace each character with the appropriate regular expression
2112                        format = format.replace(match.character, '(' + regexp[regexp.length - index - 1] + ')');
2113
2114                    });
2115
2116                    // the final regular expression
2117                    regexp = new RegExp('^' + format + '$', 'ig');
2118
2119                    // if regular expression was matched
2120                    if ((segments = regexp.exec(str_date))) {
2121
2122                        // check if date is a valid date (i.e. there's no February 31)
2123
2124                        var tmpdate = new Date(),
2125                            original_day = 1,
2126                            original_month = tmpdate.getMonth() + 1,
2127                            original_year = tmpdate.getFullYear(),
2128                            original_hours = tmpdate.getHours(),
2129                            original_minutes = tmpdate.getMinutes(),
2130                            original_seconds = tmpdate.getSeconds(),
2131                            original_ampm,
2132                            english_days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
2133                            english_months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
2134                            iterable,
2135
2136                            // by default, we assume the date is valid
2137                            valid = true;
2138
2139                        // reverse back the characters in the date's format
2140                        matches.reverse();
2141
2142                        // iterate through the characters in the date's format
2143                        $.each(matches, function(index, match) {
2144

2276
2277            }
2278
2279        };
2280
2281        /**
2282         *  Prevents the possibility of selecting text on a given element. Used on the "previous" and "next" buttons
2283         *  where text might get accidentally selected when user quickly clicks on the buttons.
2284         *
2285         *  Code by http://chris-barr.com/index.php/entry/disable_text_selection_with_jquery/
2286         *
2287         *  @param  jQuery Element  el  A jQuery element on which to prevents text selection.
2288         *
2289         *  @return void
2290         *
2291         *  @access private
2292         */
2293        var disable_text_select = function(el) {
2294
2295            // if browser is Firefox
2296            if (browser.name === 'firefox') el.css('MozUserSelect', 'none');
2297
2298            // if browser is Internet Explorer
2299            else if (browser.name === 'explorer') $(document).on('selectstart', el, function() { return false; });
2300
2301            // for the other browsers
2302            else el.mousedown(function() { return false; });
2303
2304        };
2305
2306        /**
2307         *  Escapes special characters in a string, preparing it for use in a regular expression.
2308         *
2309         *  @param  string  str     The string in which special characters should be escaped.
2310         *
2311         *  @return string          Returns the string with escaped special characters.
2312         *
2313         *  @access private
2314         */
2315        var escape_regexp = function(str) {
2316
2317            // return string with special characters escaped
2318            return str.replace(/([-.,*+?^${}()|[\]\/\\])/g, '\\$1');
2319
2320        };
2321
2322        /**
2323         *  Formats a JavaScript date object to the format specified by the "format" property.
2324         *  Code taken from http://electricprism.com/aeron/calendar/
2325         *
2326         *  @param  date    date    A valid JavaScript date object
2327         *
2328         *  @return string          Returns a string containing the formatted date
2329         *
2330         *  @access private
2331         */
2332        var format = function(date) {
2333
2334            var result = '',
2335
2336                // extract parts of the date:
2337                // day number, 1 - 31
2338                j = date.getDate(),
2339
2340                // day of the week, 0 - 6, Sunday - Saturday
2341                w = date.getDay(),
2342
2343                // the name of the day of the week Sunday - Saturday
2344                l = plugin.settings.days[w],
2345
2346                // the month number, 1 - 12
2347                n = date.getMonth() + 1,
2348
2349                // the month name, January - December
2350                f = plugin.settings.months[n - 1],
2351
2352                // the year (as a string)
2353                y = date.getFullYear() + '',
2354
2355                // the hour, 0-23
2356                h = date.getHours(),
2357
2358                // the hour in 12 hours format
2359                h12 = h % 12 === 0 ? 12 : h % 12,
2360
2361                // the minute, 0-59
2362                m = date.getMinutes(),
2363
2364                // the second, 0-59
2365                s = date.getSeconds(),
2366
2367                // am/pm
2368                a = (h >= 12 ? 'pm' : 'am'),
2369
2370                i, chr;
2371
2372            // iterate through the characters in the format
2373            for (i = 0; i < plugin.settings.format.length; i++) {
2374
2375                // extract the current character
2376                chr = plugin.settings.format.charAt(i);
2377
2378                // see what character it is
2379                switch (chr) {
2380
2381                    // year as two digits
2382                    case 'y': y = y.substr(2);
2383
2384                    // year as four digits
2385                    // falls through
2386                    case 'Y': result += y; break;
2387
2388                    // month number, prefixed with 0
2389                    case 'm': n = str_pad(n, 2);
2390
2391                    // month number, not prefixed with 0
2392                    // falls through
2393                    case 'n': result += n; break;
2394
2395                    // month name, three letters
2396                    case 'M': f = ($.isArray(plugin.settings.months_abbr) && undefined !== plugin.settings.months_abbr[n - 1] ? plugin.settings.months_abbr[n - 1] : plugin.settings.months[n - 1].substr(0, 3));
2397
2398                    // full month name
2399                    // falls through
2400                    case 'F': result += f; break;
2401
2402                    // day number, prefixed with 0
2403                    case 'd': j = str_pad(j, 2);
2404
2405                    // day number not prefixed with 0
2406                    // falls through
2407                    case 'j': result += j; break;
2408
2409                    // day name, three letters
2410                    case 'D': l = ($.isArray(plugin.settings.days_abbr) && undefined !== plugin.settings.days_abbr[w] ? plugin.settings.days_abbr[w] : plugin.settings.days[w].substr(0, 3));
2411
2412                    // full day name
2413                    // falls through
2414                    case 'l': result += l; break;
2415
2416                    // ISO-8601 numeric representation of the day of the week, 1 - 7
2417                    case 'N': w++;
2418
2419                    // day of the week, 0 - 6
2420                    // falls through
2421                    case 'w': result += w; break;
2422
2423                    // English ordinal suffix for the day of the month, 2 characters
2424                    // (st, nd, rd or th (works well with j))
2425                    case 'S':
2426
2427                        if (j % 10 === 1 && j !== '11') result += 'st';
2428
2429                        else if (j % 10 === 2 && j !== '12') result += 'nd';
2430
2431                        else if (j % 10 === 3 && j !== '13') result += 'rd';
2432
2433                        else result += 'th';
2434
2435                        break;
2436
2437                    // hour in 12 hours format, without leading zeros
2438                    case 'g': result += h12; break;
2439
2440                    // hour in 12 hours format, with leading zeros
2441                    case 'h': result += str_pad(h12, 2); break;
2442
2443                    // hour in 24 hours format, without leading zeros
2444                    case 'G': result += h; break;
2445
2446                    // hour in 24 hours format, with leading zeros
2447                    case 'H': result += str_pad(h, 2); break;
2448
2449                    // minutes, with leading zeros
2450                    case 'i': result += str_pad(m, 2); break;
2451
2452                    // seconds, with leading zeros
2453                    case 's': result += str_pad(s, 2); break;
2454
2455                    // am/pm, lowercase
2456                    case 'a': result += a; break;
2457