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/*
 * jquery.sumoselect - v3.0.3
 * http://hemantnegi.github.io/jquery.sumoselect
 * 2016-12-12
 *
 * Copyright 2015 Hemant Negi
 * Email : hemant.frnz@gmail.com
 * Compressor http://refresh-sf.com/
 */

(function(factory) {
  'use strict';
  if (typeof define === 'function' && define.amd) {
    define(['jquery'], factory);
  } else if (typeof exports !== 'undefined') {
    module.exports = factory(require('jquery'));
  } else {
    factory(jQuery);
  }

})(function ($) {

  'namespace sumo';
  $.fn.SumoSelect = function (options) {

    /* This is the easiest way to have default options.*/
    var settings = $.extend({
      placeholder: 'Select Here',   /* Dont change it here.*/
      csvDispCount: 3,              /* display no. of items in multiselect. 0 to display all.*/
      captionFormat:'{0} Selected', /* format of caption text. you can set your locale.*/
      captionFormatAllSelected:'{0} all selected!', /* format of caption text when all elements are selected. set null to use captionFormat. It will not work if there are disabled elements in select.*/
      floatWidth: 400,              /* Screen width of device at which the list is rendered in floating popup fashion.*/
      forceCustomRendering: false,  /* force the custom modal on all devices below floatWidth resolution.*/
      nativeOnDevice: ['Android', 'BlackBerry', 'iPhone', 'iPad', 'iPod', 'Opera Mini', 'IEMobile', 'Silk'],
      outputAsCSV: false,           /* true to POST data as csv ( false for Html control array ie. default select )*/
      csvSepChar: ',',              /* separation char in csv mode*/
      okCancelInMulti: false,       /* display ok cancel buttons in desktop mode multiselect also.*/
      isClickAwayOk: false,         /* for okCancelInMulti=true. sets whether click outside will trigger Ok or Cancel (default is cancel).*/
      triggerChangeCombined: true,  /* im multi select mode whether to trigger change event on individual selection or combined selection.*/
      selectAll: false,             /* to display select all button in multiselect mode.|| also select all will not be available on mobile devices.*/
      search: false,                /* to display input for filtering content. selectAlltext will be input text placeholder*/
      searchText: 'Search...',      /* placeholder for search input*/
      noMatch: 'No matches for "{0}"',
      prefix: '',                   /* some prefix usually the field name. eg. '<b>Hello</b>'*/
      locale: ['OK', 'Cancel', 'Select All'],  /* all text that is used. don't change the index.*/
      up: false,                    /* set true to open upside.*/
      showTitle: true               /* set to false to prevent title (tooltip) from appearing*/
    }, options);

    var ret = this.each(function () {
      var selObj = this; /* the original select object.*/
      if (this.sumo || !$(this).is('select')) return; /* already initialized*/

      this.sumo = {
        E: $(selObj), /* the jquery object of original select element.*/
        is_multi: $(selObj).attr('multiple'),  /* if its a multiple select*/
        select: '',
        caption: '',
        placeholder: '',
        optDiv: '',
        CaptionCont: '',
        ul:'',
        is_floating: false,
        is_opened: false,
        /* backdrop: '', */
        mob:false, /* if to open device default select */
        Pstate: [],

        createElems: function () {
          var O = this;
          O.E.wrap('<div class="SumoSelect" tabindex="0" role="button" aria-expanded="false">');
          O.select = O.E.parent();
          O.caption = $('<span>');
          O.CaptionCont = $('<p class="CaptionCont SelectBox" ><label><i></i></label></p>')
            .attr('style', O.E.attr('style'))
            .prepend(O.caption);
          O.select.append(O.CaptionCont);

          /* default turn off if no multiselect */
          if(!O.is_multi)settings.okCancelInMulti = false

          if(O.E.attr('disabled'))
            O.select.addClass('disabled').removeAttr('tabindex');

          /* if output as csv and is a multiselect.*/
          if (settings.outputAsCSV && O.is_multi && O.E.attr('name')) {
            /* create a hidden field to store csv value.*/
            O.select.append($('<input class="HEMANT123" type="hidden" />').attr('name', O.E.attr('name')).val(O.getSelStr()));

            /* so it can not post the original select.*/
            O.E.removeAttr('name');
          }

          /* break for mobile rendring.. if forceCustomRendering is false*/
          if (O.isMobile() && !settings.forceCustomRendering) {
            O.setNativeMobile();
            return;
          }

          /* if there is a name attr in select add a class to container div*/
          if(O.E.attr('name')) O.select.addClass('sumo_'+O.E.attr('name').replace(/\[\]/, ''))

          /* hide original select */
          O.E.addClass('SumoUnder').attr('tabindex','-1');

          /* Creating the list... */
          O.optDiv = $('<div class="optWrapper '+ (settings.up?'up':'') +'">');

          /* branch for floating list in low res devices.*/
          O.floatingList();

          /* Creating the markup for the available options*/
          O.ul = $('<ul class="options">');
          O.optDiv.append(O.ul);

          /* Select all functionality*/
          if(settings.selectAll && O.is_multi) O.SelAll();

          /* search functionality*/
          if(settings.search) O.Search();

          O.ul.append(O.prepItems(O.E.children()));

          /* if multiple then add the class multiple and add OK / CANCEL button */
          if (O.is_multi) O.multiSelelect();

          O.select.append(O.optDiv);
          O.basicEvents();
          O.selAllState();
        },

        prepItems: function(opts, d){
          var lis = [], O=this;
          $(opts).each(function (i, opt) { /* parsing options to li */
            opt = $(opt);
            lis.push(opt.is('optgroup')?
              $('<li class="group '+ (opt[0].disabled?'disabled':'') +'"><label>' + opt.attr('label') +'</label><ul></ul></li>')
                .find('ul')
                .append(O.prepItems(opt.children(), opt[0].disabled))
                .end()
              :
              O.createLi(opt, d)
            );
          });
          return lis;
        },

        /* Creates a LI element from a given option and binds events to it*/
        /*returns the jquery instance of li (not inserted in dom)*/
        createLi: function (opt, d) {
          var O = this;

          if(!opt.attr('value'))opt.attr('value',opt.val());
          var li = $('<li class="opt"><label>' + opt.text() + '</label></li>');

          li.data('opt', opt); /* store a direct reference to option.*/
          opt.data('li', li); /* store a direct reference to list item.*/
          if (O.is_multi) li.prepend('<span><i></i></span>');

          if (opt[0].disabled || d)
            li = li.addClass('disabled');

          O.onOptClick(li);

          if (opt[0].selected)
            li.addClass('selected');

          if (opt.attr('class'))
            li.addClass(opt.attr('class'));

          if (opt.attr('title'))
            li.attr('title', opt.attr('title'));

          return li;
        },

        /* Returns the selected items as string in a Multiselect.*/
        getSelStr: function () {
          /* get the pre selected items.*/
          sopt = [];
          this.E.find('option:selected').each(function () { sopt.push($(this).val()); });
          return sopt.join(settings.csvSepChar);
        },

        /* THOSE OK/CANCEL BUTTONS ON MULTIPLE SELECT.*/
        multiSelelect: function () {
          var O = this;
          O.optDiv.addClass('multiple');
          O.okbtn = $('<p tabindex="0" class="btnOk">'+settings.locale[0]+'</p>').click(function () {
            /* if combined change event is set.*/
            O._okbtn();
            O.hideOpts();
          });
          O.cancelBtn = $('<p tabindex="0" class="btnCancel">'+settings.locale[1]+'</p>').click(function () {
            O._cnbtn();
            O.hideOpts();
          });
          var btns = O.okbtn.add(O.cancelBtn);
          O.optDiv.append($('<div class="MultiControls">').append(btns));

          /* handling keyboard navigation on ok cancel buttons. */
          btns.on('keydown.sumo', function (e) {
            var el = $(this);
            switch (e.which) {
              case 32: /* space */
              case 13: /* enter */
                el.trigger('click');
                break;

              case 9:  /* tab */
                if(el.hasClass('btnOk'))return;
              case 27: /* esc */
                O._cnbtn();
                O.hideOpts();
                return;
            }
            e.stopPropagation();
            e.preventDefault();
          });
        },

        _okbtn:function(){
          var O = this, cg = 0;
          /* if combined change event is set. */
          if (settings.triggerChangeCombined) {
            /* check for a change in the selection. */
            if (O.E.find('option:selected').length != O.Pstate.length) {
              cg = 1;
            }
            else {
              O.E.find('option').each(function (i,e) {
                if(e.selected && O.Pstate.indexOf(i) < 0) cg = 1;
              });
            }

            if (cg) {
              O.callChange();
              O.setText();
            }
          }
        },
        _cnbtn:function(){
          var O = this;
          /* remove all selections */
          O.E.find('option:selected').each(function () { this.selected = false; });
          O.optDiv.find('li.selected').removeClass('selected')

          /* restore selections from saved state. */
          for(var i = 0; i < O.Pstate.length; i++) {
            O.E.find('option')[O.Pstate[i]].selected = true;
            O.ul.find('li.opt').eq(O.Pstate[i]).addClass('selected');
          }
          O.selAllState();
        },

        SelAll:function(){
          var O = this;
          if(!O.is_multi)return;
          O.selAll = $('<p class="select-all"><span><i></i></span><label>' + settings.locale[2] + '</label></p>');
          O.optDiv.addClass('selall');
          O.selAll.on('click',function(){
            O.selAll.toggleClass('selected');
            O.toggSelAll(O.selAll.hasClass('selected'), 1);
            //O.selAllState();
          });

          O.optDiv.prepend(O.selAll);
        },

        /* search module (can be removed if not required.) */
        Search: function(){
          var O = this,
            cc = O.CaptionCont.addClass('search'),
            P = $('<p class="no-match">');

          O.ftxt = $('<input type="text" class="search-txt" value="" placeholder="' + settings.searchText + '">')
            .on('click', function(e){
              e.stopPropagation();
            });
          cc.append(O.ftxt);
          O.optDiv.children('ul').after(P);

          O.ftxt.on('keyup.sumo',function(){
            var hid = O.optDiv.find('ul.options li.opt').each(function(ix,e){
              var e = $(e),
                opt = e.data('opt')[0];
              opt.hidden = e.text().toLowerCase().indexOf(O.ftxt.val().toLowerCase()) < 0;
              e.toggleClass('hidden', opt.hidden);
            }).not('.hidden');

            P.html(settings.noMatch.replace(/\{0\}/g, '<em></em>')).toggle(!hid.length);
            P.find('em').text(O.ftxt.val());
            O.selAllState();
          });
        },

        selAllState: function () {
          var O = this;
          if (settings.selectAll && O.is_multi) {
            var sc = 0, vc = 0;
            O.optDiv.find('li.opt').not('.hidden').each(function (ix, e) {
              if ($(e).hasClass('selected')) sc++;
              if (!$(e).hasClass('disabled')) vc++;
            });
            /* select all checkbox state change. */
            if (sc == vc) O.selAll.removeClass('partial').addClass('selected');
            else if (sc == 0) O.selAll.removeClass('selected partial');
            else O.selAll.addClass('partial') /* .removeClass('selected'); */
          }
        },

        showOpts: function () {
          var O = this;
          if (O.E.attr('disabled')) return; /* if select is disabled then retrun */
          O.E.trigger('sumo:opening', O);
          O.is_opened = true;
          O.select.addClass('open').attr('aria-expanded', 'true');
          O.E.trigger('sumo:opened', O);

          if(O.ftxt)O.ftxt.focus();
          else O.select.focus();

          /* hide options on click outside.*/
          $(document).on('click.sumo', function (e) {
            if (!O.select.is(e.target)                  /* if the target of the click isn't the container... */
              && O.select.has(e.target).length === 0){ /* ... nor a descendant of the container */
              if(!O.is_opened)return;
              O.hideOpts();
              if (settings.okCancelInMulti){
                if(settings.isClickAwayOk)
                  O._okbtn();
                else
                  O._cnbtn();
              }
            }
          });

          if (O.is_floating) {
            H = O.optDiv.children('ul').outerHeight() + 2;  /* +2 is clear fix*/
            if (O.is_multi) H = H + parseInt(O.optDiv.css('padding-bottom'));
            O.optDiv.css('height', H);
            $('body').addClass('sumoStopScroll');
          }

          O.setPstate();
        },

        /* maintain state when ok/cancel buttons are available storing the indexes. */
        setPstate: function(){
          var O = this;
          if (O.is_multi && (O.is_floating || settings.okCancelInMulti)){
            O.Pstate = [];
            /* assuming that find returns elements in tree order */
            O.E.find('option').each(function (i, e){if(e.selected) O.Pstate.push(i);});
          }
        },

        callChange:function(){
          this.E.trigger('change').trigger('click');
        },

        hideOpts: function () {
          var O = this;
          if(O.is_opened){
            O.E.trigger('sumo:closing', O);
            O.is_opened = false;
            O.select.removeClass('open').attr('aria-expanded', 'true').find('ul li.sel').removeClass('sel');
            O.E.trigger('sumo:closed', O);
            $(document).off('click.sumo');
            O.select.focus();
            $('body').removeClass('sumoStopScroll');

            /* clear the search */
            if(settings.search){
              O.ftxt.val('');
              O.ftxt.trigger('keyup.sumo');
            }
          }
        },
        setOnOpen: function () {
          var O = this,
            li = O.optDiv.find('li.opt:not(.hidden)').eq(settings.search?0:O.E[0].selectedIndex);
          if(li.hasClass('disabled')){
            li = li.next(':not(disabled)')
            if(!li.length) return;
          }
          O.optDiv.find('li.sel').removeClass('sel');
          li.addClass('sel');
          O.showOpts();
        },
        nav: function (up) {
          var O = this, c,
            s=O.ul.find('li.opt:not(.disabled, .hidden)'),
            sel = O.ul.find('li.opt.sel:not(.hidden)'),
            idx = s.index(sel);
          if (O.is_opened && sel.length) {

            if (up && idx > 0)
              c = s.eq(idx-1);
            else if(!up && idx < s.length-1 && idx > -1)
              c = s.eq(idx+1);
            else return; /* if no items before or after*/

            sel.removeClass('sel');
            sel = c.addClass('sel');

            /* setting sel item to visible view. */
            var ul = O.ul,
              st = ul.scrollTop(),
              t = sel.position().top + st;
            if(t >= st + ul.height()-sel.outerHeight())
              ul.scrollTop(t - ul.height() + sel.outerHeight());
            if(t<st)
              ul.scrollTop(t);

          }
          else
            O.setOnOpen();
        },

        basicEvents: function () {
          var O = this;
          O.CaptionCont.click(function (evt) {
            O.E.trigger('click');
            if (O.is_opened) O.hideOpts(); else O.showOpts();
            evt.stopPropagation();
          });

          O.select.on('keydown.sumo', function (e) {
            switch (e.which) {
              case 38: /* up */
                O.nav(true);
                break;

              case 40: /* down */
                O.nav(false);
                break;

              case 65: /* shortcut ctrl + a to select all and ctrl + shift + a to unselect all.*/
                if (O.is_multi && e.ctrlKey){
                  O.toggSelAll(!e.shiftKey, 1);
                  break;
                }
                else
                  return;

              case 32: /* space*/
                if(settings.search && O.ftxt.is(e.target))return;
              case 13: /* enter*/
                if (O.is_opened)
                  O.optDiv.find('ul li.sel').trigger('click');
                else
                  O.setOnOpen();
                break;
              case 9:	 /* tab*/
                if(!settings.okCancelInMulti)
                  O.hideOpts();
                return;
              case 27: /* esc*/
                if(settings.okCancelInMulti)O._cnbtn();
                O.hideOpts();
                return;

              default:
                return; /* exit this handler for other keys */
            }
            e.preventDefault(); /* prevent the default action (scroll / move caret) */
          });

          $(window).on('resize.sumo', function () {
            O.floatingList();
          });
        },

        onOptClick: function (li) {
          var O = this;
          li.click(function () {
            var li = $(this);
            if(li.hasClass('disabled'))return;
            var txt = "";
            if (O.is_multi) {
              li.toggleClass('selected');
              li.data('opt')[0].selected = li.hasClass('selected');
              O.selAllState();
            }
            else {
              li.parent().find('li.selected').removeClass('selected'); //if not multiselect then remove all selections from this list
              li.toggleClass('selected');
              li.data('opt')[0].selected = true;
            }

            //branch for combined change event.
            if (!(O.is_multi && settings.triggerChangeCombined && (O.is_floating || settings.okCancelInMulti))) {
              O.setText();
              O.callChange();
            }

            if (!O.is_multi) O.hideOpts(); //if its not a multiselect then hide on single select.
          });
        },

        setText: function () {
          var O = this;
          O.placeholder = "";
          if (O.is_multi) {
            sels = O.E.find(':selected').not(':disabled'); //selected options.

            for (i = 0; i < sels.length; i++) {
              if (i + 1 >= settings.csvDispCount && settings.csvDispCount) {
                if (sels.length == O.E.find('option').length && settings.captionFormatAllSelected) {
                  O.placeholder = settings.captionFormatAllSelected.replace(/\{0\}/g, sels.length)+',';
                } else {
                  O.placeholder = settings.captionFormat.replace(/\{0\}/g, sels.length)+',';
                }

                break;
              }
              else O.placeholder += $(sels[i]).text() + ", ";
            }
            O.placeholder = O.placeholder.replace(/,([^,]*)$/, '$1'); //remove unexpected "," from last.
          }
          else {
            O.placeholder = O.E.find(':selected').not(':disabled').text();
          }

          var is_placeholder = false;

          if (!O.placeholder) {

            is_placeholder = true;

            O.placeholder = O.E.attr('placeholder');
            if (!O.placeholder)                  //if placeholder is there then set it
              O.placeholder = O.E.find('option:disabled:selected').text();
          }

          O.placeholder = O.placeholder ? (settings.prefix + ' ' + O.placeholder) : settings.placeholder

          //set display text
          O.caption.html(O.placeholder);
          if (settings.showTitle) O.CaptionCont.attr('title', O.placeholder);

          //set the hidden field if post as csv is true.
          var csvField = O.select.find('input.HEMANT123');
          if (csvField.length) csvField.val(O.getSelStr());

          //add class placeholder if its a placeholder text.
          if (is_placeholder) O.caption.addClass('placeholder'); else O.caption.removeClass('placeholder');
          return O.placeholder;
        },

        isMobile: function () {

          /* Adapted from http://www.detectmobilebrowsers.com */
          var ua = navigator.userAgent || navigator.vendor || window.opera;

          /* Checks for iOs, Android, Blackberry, Opera Mini, and Windows mobile devices */
          for (var i = 0; i < settings.nativeOnDevice.length; i++) if (ua.toString().toLowerCase().indexOf(settings.nativeOnDevice[i].toLowerCase()) > 0) return settings.nativeOnDevice[i];
          return false;
        },

        setNativeMobile: function () {
          var O = this;
          O.E.addClass('SelectClass'); /* .css('height', O.select.outerHeight()); */
          O.mob = true;
          O.E.change(function () {
            O.setText();
          });
        },

        floatingList: function () {
          var O = this;
          /*called on init and also on resize.*/
          /*O.is_floating = true if window width is < specified float width*/
          O.is_floating = $(window).width() <= settings.floatWidth;

          /*set class isFloating*/
          O.optDiv.toggleClass('isFloating', O.is_floating);

          /*remove height if not floating*/
          if (!O.is_floating) O.optDiv.css('height', '');

          /*toggle class according to okCancelInMulti flag only when it is not floating*/
          O.optDiv.toggleClass('okCancelInMulti', settings.okCancelInMulti && !O.is_floating);
        },

        /* HELPERS FOR OUTSIDERS*/
        /* validates range of given item operations*/
        vRange: function (i) {
          var O = this;
          var opts = O.E.find('option');
          if (opts.length <= i || i < 0) throw "index out of bounds"
          return O;
        },

        /*toggles selection on c as boolean.*/
        toggSel: function (c, i) {
          var O = this;
          var opt;
          if (typeof(i) === "number"){
            O.vRange(i);
            opt = O.E.find('option')[i];
          }
          else{
            opt = O.E.find('option[value="'+i+'"]')[0]||0;
          }
          if (!opt || opt.disabled)
            return;

          if(opt.selected != c){
            opt.selected = c;
            if(!O.mob) $(opt).data('li').toggleClass('selected',c);

            O.callChange();
            O.setPstate();
            O.setText();
            O.selAllState();
          }
        },

        /*toggles disabled on c as boolean.*/
        toggDis: function (c, i) {
          var O = this.vRange(i);
          O.E.find('option')[i].disabled = c;
          if(c)O.E.find('option')[i].selected = false;
          if(!O.mob)O.optDiv.find('ul.options li').eq(i).toggleClass('disabled', c).removeClass('selected');
          O.setText();
        },

        /* toggle disable/enable on complete select control*/
        toggSumo: function(val) {
          var O = this;
          O.enabled = val;
          O.select.toggleClass('disabled', val);

          if (val) {
            O.E.attr('disabled', 'disabled');
            O.select.removeAttr('tabindex');
          }
          else{
            O.E.removeAttr('disabled');
            O.select.attr('tabindex','0');
          }

          return O;
        },

        /* toggles all option on c as boolean.*/
        /* set direct=false/0 bypasses okCancelInMulti behaviour.*/
        toggSelAll: function (c, direct) {
          var O = this;
          O.E.find('option:not(:disabled,:hidden)')
           .each(function(ix,e){
             var is_selected=e.selected,
               e = $(e).data('li');
             if(e.hasClass('hidden'))return;
             if(!!c){
               if(!is_selected)e.trigger('click');
             }
             else{
               if(is_selected)e.trigger('click');
             }
           });

          if(!direct){
            if(!O.mob && O.selAll)O.selAll.removeClass('partial').toggleClass('selected',!!c);
            O.callChange();
            O.setText();
            O.setPstate();
          }
        },

        /* outside accessibility options
         which can be accessed from the element instance.
         */
        reload:function(){
          var elm = this.unload();
          return $(elm).SumoSelect(settings);
        },

        unload: function () {
          var O = this;
          O.select.before(O.E);
          O.E.show();

          if (settings.outputAsCSV && O.is_multi && O.select.find('input.HEMANT123').length) {
            O.E.attr('name', O.select.find('input.HEMANT123').attr('name')); /* restore the name; */
          }
          O.select.remove();
          delete selObj.sumo;
          return selObj;
        },

        /* add a new option to select at a given index.*/
        add: function (val, txt, i) {
          if (typeof val == "undefined") throw "No value to add"

          var O = this;
          opts=O.E.find('option')
          if (typeof txt == "number") { i = txt; txt = val; }
          if (typeof txt == "undefined") { txt = val; }

          opt = $("<option></option>").val(val).html(txt);

          if (opts.length < i) throw "index out of bounds"

          if (typeof i == "undefined" || opts.length == i) { /* add it to the last if given index is last no or no index provides.*/
            O.E.append(opt);
            if(!O.mob)O.ul.append(O.createLi(opt));
          }
          else {
            opts.eq(i).before(opt);
            if(!O.mob)O.ul.find('li.opt').eq(i).before(O.createLi(opt));
          }

          return selObj;
        },

        /* removes an item at a given index. */
        remove: function (i) {
          var O = this.vRange(i);
          O.E.find('option').eq(i).remove();
          if(!O.mob)O.optDiv.find('ul.options li').eq(i).remove();
          O.setText();
        },

        /* Select an item at a given index.*/
        selectItem: function (i) { this.toggSel(true, i); },

        /* UnSelect an iten at a given index.*/
        unSelectItem: function (i) { this.toggSel(false, i); },

        /* Select all items  of the select.*/
        selectAll: function () { this.toggSelAll(true); },

        /* UnSelect all items of the select.*/
        unSelectAll: function () { this.toggSelAll(false); },

        /* Disable an iten at a given index.*/
        disableItem: function (i) { this.toggDis(true, i) },

        /* Removes disabled an iten at a given index.*/
        enableItem: function (i) { this.toggDis(false, i) },

        /* New simple methods as getter and setter are not working fine in ie8-*/
        /* variable to check state of control if enabled or disabled.*/
        enabled : true,
        /* Enables the control*/
        enable: function(){return this.toggSumo(false)},

        /* Disables the control*/
        disable: function(){return this.toggSumo(true)},
        init: function () {
          var O = this;
          O.createElems();
          O.setText();
          return O
        }
      };
      selObj.sumo.init();
    });

    return ret.length == 1 ? ret[0] : ret;
  };
});