chosen.proto.min.js

/* Chosen v1.0.0 | (c) 2011-2013 by Harvest | MIT License, https://github.com/harvesthq/chosen/blob/master/LICENSE.md */
!function(){var AbstractChosen,SelectParser,a,b={}.hasOwnProperty,c=function(a,c){function d(){this.constructor=a}for(var e in c)b.call(c,e)&&(a[e]=c[e]);return d.prototype=c.prototype,a.prototype=new d,a.__super__=c.prototype,a};SelectParser=function(){function SelectParser(){this.options_index=0,this.parsed=[]}return SelectParser.prototype.add_node=function(a){return"OPTGROUP"===a.nodeName.toUpperCase()?this.add_group(a):this.add_option(a)},SelectParser.prototype.add_group=function(a){var b,c,d,e,f,g;for(b=this.parsed.length,this.parsed.push({array_index:b,group:!0,label:this.escapeExpression(a.label),children:0,disabled:a.disabled}),f=a.childNodes,g=[],d=0,e=f.length;e>d;d++)c=f[d],g.push(this.add_option(c,b,a.disabled));return g},SelectParser.prototype.add_option=function(a,b,c){return"OPTION"===a.nodeName.toUpperCase()?(""!==a.text?(null!=b&&(this.parsed[b].children+=1),this.parsed.push({array_index:this.parsed.length,options_index:this.options_index,value:a.value,text:a.text,html:a.innerHTML,selected:a.selected,disabled:c===!0?c:a.disabled,group_array_index:b,classes:a.className,style:a.style.cssText})):this.parsed.push({array_index:this.parsed.length,options_index:this.options_index,empty:!0}),this.options_index+=1):void 0},SelectParser.prototype.escapeExpression=function(a){var b,c;return null==a||a===!1?"":/[\&\<\>\"\'\`]/.test(a)?(b={"<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#x27;","`":"&#x60;"},c=/&(?!\w+;)|[\<\>\"\'\`]/g,a.replace(c,function(a){return b[a]||"&amp;"})):a},SelectParser}(),SelectParser.select_to_array=function(a){var b,c,d,e,f;for(c=new SelectParser,f=a.childNodes,d=0,e=f.length;e>d;d++)b=f[d],c.add_node(b);return c.parsed},AbstractChosen=function(){function AbstractChosen(a,b){this.form_field=a,this.options=null!=b?b:{},AbstractChosen.browser_is_supported()&&(this.is_multiple=this.form_field.multiple,this.set_default_text(),this.set_default_values(),this.setup(),this.set_up_html(),this.register_observers())}return AbstractChosen.prototype.set_default_values=function(){var a=this;return this.click_test_action=function(b){return a.test_active_click(b)},this.activate_action=function(b){return a.activate_field(b)},this.active_field=!1,this.mouse_on_container=!1,this.results_showing=!1,this.result_highlighted=null,this.result_single_selected=null,this.allow_single_deselect=null!=this.options.allow_single_deselect&&null!=this.form_field.options[0]&&""===this.form_field.options[0].text?this.options.allow_single_deselect:!1,this.disable_search_threshold=this.options.disable_search_threshold||0,this.disable_search=this.options.disable_search||!1,this.enable_split_word_search=null!=this.options.enable_split_word_search?this.options.enable_split_word_search:!0,this.group_search=null!=this.options.group_search?this.options.group_search:!0,this.search_contains=this.options.search_contains||!1,this.single_backstroke_delete=null!=this.options.single_backstroke_delete?this.options.single_backstroke_delete:!0,this.max_selected_options=this.options.max_selected_options||1/0,this.inherit_select_classes=this.options.inherit_select_classes||!1,this.display_selected_options=null!=this.options.display_selected_options?this.options.display_selected_options:!0,this.display_disabled_options=null!=this.options.display_disabled_options?this.options.display_disabled_options:!0},AbstractChosen.prototype.set_default_text=function(){return this.default_text=this.form_field.getAttribute("data-placeholder")?this.form_field.getAttribute("data-placeholder"):this.is_multiple?this.options.placeholder_text_multiple||this.options.placeholder_text||AbstractChosen.default_multiple_text:this.options.placeholder_text_single||this.options.placeholder_text||AbstractChosen.default_single_text,this.results_none_found=this.form_field.getAttribute("data-no_results_text")||this.options.no_results_text||AbstractChosen.default_no_result_text},AbstractChosen.prototype.mouse_enter=function(){return this.mouse_on_container=!0},AbstractChosen.prototype.mouse_leave=function(){return this.mouse_on_container=!1},AbstractChosen.prototype.input_focus=function(){var a=this;if(this.is_multiple){if(!this.active_field)return setTimeout(function(){return a.container_mousedown()},50)}else if(!this.active_field)return this.activate_field()},AbstractChosen.prototype.input_blur=function(){var a=this;return this.mouse_on_container?void 0:(this.active_field=!1,setTimeout(function(){return a.blur_test()},100))},AbstractChosen.prototype.results_option_build=function(a){var b,c,d,e,f;for(b="",f=this.results_data,d=0,e=f.length;e>d;d++)c=f[d],b+=c.group?this.result_add_group(c):this.result_add_option(c),(null!=a?a.first:void 0)&&(c.selected&&this.is_multiple?this.choice_build(c):c.selected&&!this.is_multiple&&this.single_set_selected_text(c.text));return b},AbstractChosen.prototype.result_add_option=function(a){var b,c;return a.search_match?this.include_option_in_results(a)?(b=[],a.disabled||a.selected&&this.is_multiple||b.push("active-result"),!a.disabled||a.selected&&this.is_multiple||b.push("disabled-result"),a.selected&&b.push("result-selected"),null!=a.group_array_index&&b.push("group-option"),""!==a.classes&&b.push(a.classes),c=""!==a.style.cssText?' style="'+a.style+'"':"",'<li class="'+b.join(" ")+'"'+c+' data-option-array-index="'+a.array_index+'">'+a.search_text+"</li>"):"":""},AbstractChosen.prototype.result_add_group=function(a){return a.search_match||a.group_match?a.active_options>0?'<li class="group-result">'+a.search_text+"</li>":"":""},AbstractChosen.prototype.results_update_field=function(){return this.set_default_text(),this.is_multiple||this.results_reset_cleanup(),this.result_clear_highlight(),this.result_single_selected=null,this.results_build(),this.results_showing?this.winnow_results():void 0},AbstractChosen.prototype.results_toggle=function(){return this.results_showing?this.results_hide():this.results_show()},AbstractChosen.prototype.results_search=function(){return this.results_showing?this.winnow_results():this.results_show()},AbstractChosen.prototype.winnow_results=function(){var a,b,c,d,e,f,g,h,i,j,k,l,m;for(this.no_results_clear(),e=0,g=this.get_search_text(),a=g.replace(/[-[\]{}()*+?.,\\^$|#\s]/g,"\\$&"),d=this.search_contains?"":"^",c=new RegExp(d+a,"i"),j=new RegExp(a,"i"),m=this.results_data,k=0,l=m.length;l>k;k++)b=m[k],b.search_match=!1,f=null,this.include_option_in_results(b)&&(b.group&&(b.group_match=!1,b.active_options=0),null!=b.group_array_index&&this.results_data[b.group_array_index]&&(f=this.results_data[b.group_array_index],0===f.active_options&&f.search_match&&(e+=1),f.active_options+=1),(!b.group||this.group_search)&&(b.search_text=b.group?b.label:b.html,b.search_match=this.search_string_match(b.search_text,c),b.search_match&&!b.group&&(e+=1),b.search_match?(g.length&&(h=b.search_text.search(j),i=b.search_text.substr(0,h+g.length)+"</em>"+b.search_text.substr(h+g.length),b.search_text=i.substr(0,h)+"<em>"+i.substr(h)),null!=f&&(f.group_match=!0)):null!=b.group_array_index&&this.results_data[b.group_array_index].search_match&&(b.search_match=!0)));return this.result_clear_highlight(),1>e&&g.length?(this.update_results_content(""),this.no_results(g)):(this.update_results_content(this.results_option_build()),this.winnow_results_set_highlight())},AbstractChosen.prototype.search_string_match=function(a,b){var c,d,e,f;if(b.test(a))return!0;if(this.enable_split_word_search&&(a.indexOf(" ")>=0||0===a.indexOf("["))&&(d=a.replace(/\[|\]/g,"").split(" "),d.length))for(e=0,f=d.length;f>e;e++)if(c=d[e],b.test(c))return!0},AbstractChosen.prototype.choices_count=function(){var a,b,c,d;if(null!=this.selected_option_count)return this.selected_option_count;for(this.selected_option_count=0,d=this.form_field.options,b=0,c=d.length;c>b;b++)a=d[b],a.selected&&(this.selected_option_count+=1);return this.selected_option_count},AbstractChosen.prototype.choices_click=function(a){return a.preventDefault(),this.results_showing||this.is_disabled?void 0:this.results_show()},AbstractChosen.prototype.keyup_checker=function(a){var b,c;switch(b=null!=(c=a.which)?c:a.keyCode,this.search_field_scale(),b){case 8:if(this.is_multiple&&this.backstroke_length<1&&this.choices_count()>0)return this.keydown_backstroke();if(!this.pending_backstroke)return this.result_clear_highlight(),this.results_search();break;case 13:if(a.preventDefault(),this.results_showing)return this.result_select(a);break;case 27:return this.results_showing&&this.results_hide(),!0;case 9:case 38:case 40:case 16:case 91:case 17:break;default:return this.results_search()}},AbstractChosen.prototype.container_width=function(){return null!=this.options.width?this.options.width:""+this.form_field.offsetWidth+"px"},AbstractChosen.prototype.include_option_in_results=function(a){return this.is_multiple&&!this.display_selected_options&&a.selected?!1:!this.display_disabled_options&&a.disabled?!1:a.empty?!1:!0},AbstractChosen.browser_is_supported=function(){return"Microsoft Internet Explorer"===window.navigator.appName?document.documentMode>=8:/iP(od|hone)/i.test(window.navigator.userAgent)?!1:/Android/i.test(window.navigator.userAgent)&&/Mobile/i.test(window.navigator.userAgent)?!1:!0},AbstractChosen.default_multiple_text="Select Some Options",AbstractChosen.default_single_text="Select an Option",AbstractChosen.default_no_result_text="No results match",AbstractChosen}(),this.Chosen=function(b){function Chosen(){return a=Chosen.__super__.constructor.apply(this,arguments)}return c(Chosen,b),Chosen.prototype.setup=function(){return this.current_selectedIndex=this.form_field.selectedIndex,this.is_rtl=this.form_field.hasClassName("chosen-rtl")},Chosen.prototype.set_default_values=function(){return Chosen.__super__.set_default_values.call(this),this.single_temp=new Template('<a class="chosen-single chosen-default" tabindex="-1"><span>#{default}</span><div><b></b></div></a><div class="chosen-drop"><div class="chosen-search"><input type="text" autocomplete="off" /></div><ul class="chosen-results"></ul></div>'),this.multi_temp=new Template('<ul class="chosen-choices"><li class="search-field"><input type="text" value="#{default}" class="default" autocomplete="off" style="width:25px;" /></li></ul><div class="chosen-drop"><ul class="chosen-results"></ul></div>'),this.no_results_temp=new Template('<li class="no-results">'+this.results_none_found+' "<span>#{terms}</span>"</li>')},Chosen.prototype.set_up_html=function(){var a,b;return a=["chosen-container"],a.push("chosen-container-"+(this.is_multiple?"multi":"single")),this.inherit_select_classes&&this.form_field.className&&a.push(this.form_field.className),this.is_rtl&&a.push("chosen-rtl"),b={"class":a.join(" "),style:"width: "+this.container_width()+";",title:this.form_field.title},this.form_field.id.length&&(b.id=this.form_field.id.replace(/[^\w]/g,"_")+"_chosen"),this.container=this.is_multiple?new Element("div",b).update(this.multi_temp.evaluate({"default":this.default_text})):new Element("div",b).update(this.single_temp.evaluate({"default":this.default_text})),this.form_field.hide().insert({after:this.container}),this.dropdown=this.container.down("div.chosen-drop"),this.search_field=this.container.down("input"),this.search_results=this.container.down("ul.chosen-results"),this.search_field_scale(),this.search_no_results=this.container.down("li.no-results"),this.is_multiple?(this.search_choices=this.container.down("ul.chosen-choices"),this.search_container=this.container.down("li.search-field")):(this.search_container=this.container.down("div.chosen-search"),this.selected_item=this.container.down(".chosen-single")),this.results_build(),this.set_tab_index(),this.set_label_behavior(),this.form_field.fire("chosen:ready",{chosen:this})},Chosen.prototype.register_observers=function(){var a=this;return this.container.observe("mousedown",function(b){return a.container_mousedown(b)}),this.container.observe("mouseup",function(b){return a.container_mouseup(b)}),this.container.observe("mouseenter",function(b){return a.mouse_enter(b)}),this.container.observe("mouseleave",function(b){return a.mouse_leave(b)}),this.search_results.observe("mouseup",function(b){return a.search_results_mouseup(b)}),this.search_results.observe("mouseover",function(b){return a.search_results_mouseover(b)}),this.search_results.observe("mouseout",function(b){return a.search_results_mouseout(b)}),this.search_results.observe("mousewheel",function(b){return a.search_results_mousewheel(b)}),this.search_results.observe("DOMMouseScroll",function(b){return a.search_results_mousewheel(b)}),this.form_field.observe("chosen:updated",function(b){return a.results_update_field(b)}),this.form_field.observe("chosen:activate",function(b){return a.activate_field(b)}),this.form_field.observe("chosen:open",function(b){return a.container_mousedown(b)}),this.search_field.observe("blur",function(b){return a.input_blur(b)}),this.search_field.observe("keyup",function(b){return a.keyup_checker(b)}),this.search_field.observe("keydown",function(b){return a.keydown_checker(b)}),this.search_field.observe("focus",function(b){return a.input_focus(b)}),this.is_multiple?this.search_choices.observe("click",function(b){return a.choices_click(b)}):this.container.observe("click",function(a){return a.preventDefault()})},Chosen.prototype.destroy=function(){return document.stopObserving("click",this.click_test_action),this.form_field.stopObserving(),this.container.stopObserving(),this.search_results.stopObserving(),this.search_field.stopObserving(),null!=this.form_field_label&&this.form_field_label.stopObserving(),this.is_multiple?(this.search_choices.stopObserving(),this.container.select(".search-choice-close").each(function(a){return a.stopObserving()})):this.selected_item.stopObserving(),this.search_field.tabIndex&&(this.form_field.tabIndex=this.search_field.tabIndex),this.container.remove(),this.form_field.show()},Chosen.prototype.search_field_disabled=function(){return this.is_disabled=this.form_field.disabled,this.is_disabled?(this.container.addClassName("chosen-disabled"),this.search_field.disabled=!0,this.is_multiple||this.selected_item.stopObserving("focus",this.activate_action),this.close_field()):(this.container.removeClassName("chosen-disabled"),this.search_field.disabled=!1,this.is_multiple?void 0:this.selected_item.observe("focus",this.activate_action))},Chosen.prototype.container_mousedown=function(a){return this.is_disabled||(a&&"mousedown"===a.type&&!this.results_showing&&a.stop(),null!=a&&a.target.hasClassName("search-choice-close"))?void 0:(this.active_field?this.is_multiple||!a||a.target!==this.selected_item&&!a.target.up("a.chosen-single")||this.results_toggle():(this.is_multiple&&this.search_field.clear(),document.observe("click",this.click_test_action),this.results_show()),this.activate_field())},Chosen.prototype.container_mouseup=function(a){return"ABBR"!==a.target.nodeName||this.is_disabled?void 0:this.results_reset(a)},Chosen.prototype.search_results_mousewheel=function(a){var b;return b=-a.wheelDelta||a.detail,null!=b?(a.preventDefault(),"DOMMouseScroll"===a.type&&(b=40*b),this.search_results.scrollTop=b+this.search_results.scrollTop):void 0},Chosen.prototype.blur_test=function(){return!this.active_field&&this.container.hasClassName("chosen-container-active")?this.close_field():void 0},Chosen.prototype.close_field=function(){return document.stopObserving("click",this.click_test_action),this.active_field=!1,this.results_hide(),this.container.removeClassName("chosen-container-active"),this.clear_backstroke(),this.show_search_field_default(),this.search_field_scale()},Chosen.prototype.activate_field=function(){return this.container.addClassName("chosen-container-active"),this.active_field=!0,this.search_field.value=this.search_field.value,this.search_field.focus()},Chosen.prototype.test_active_click=function(a){return a.target.up(".chosen-container")===this.container?this.active_field=!0:this.close_field()},Chosen.prototype.results_build=function(){return this.parsing=!0,this.selected_option_count=null,this.results_data=SelectParser.select_to_array(this.form_field),this.is_multiple?this.search_choices.select("li.search-choice").invoke("remove"):this.is_multiple||(this.single_set_selected_text(),this.disable_search||this.form_field.options.length<=this.disable_search_threshold?(this.search_field.readOnly=!0,this.container.addClassName("chosen-container-single-nosearch")):(this.search_field.readOnly=!1,this.container.removeClassName("chosen-container-single-nosearch"))),this.update_results_content(this.results_option_build({first:!0})),this.search_field_disabled(),this.show_search_field_default(),this.search_field_scale(),this.parsing=!1},Chosen.prototype.result_do_highlight=function(a){var b,c,d,e,f;return this.result_clear_highlight(),this.result_highlight=a,this.result_highlight.addClassName("highlighted"),d=parseInt(this.search_results.getStyle("maxHeight"),10),f=this.search_results.scrollTop,e=d+f,c=this.result_highlight.positionedOffset().top,b=c+this.result_highlight.getHeight(),b>=e?this.search_results.scrollTop=b-d>0?b-d:0:f>c?this.search_results.scrollTop=c:void 0},Chosen.prototype.result_clear_highlight=function(){return this.result_highlight&&this.result_highlight.removeClassName("highlighted"),this.result_highlight=null},Chosen.prototype.results_show=function(){return this.is_multiple&&this.max_selected_options<=this.choices_count()?(this.form_field.fire("chosen:maxselected",{chosen:this}),!1):(this.container.addClassName("chosen-with-drop"),this.form_field.fire("chosen:showing_dropdown",{chosen:this}),this.results_showing=!0,this.search_field.focus(),this.search_field.value=this.search_field.value,this.winnow_results())},Chosen.prototype.update_results_content=function(a){return this.search_results.update(a)},Chosen.prototype.results_hide=function(){return this.results_showing&&(this.result_clear_highlight(),this.container.removeClassName("chosen-with-drop"),this.form_field.fire("chosen:hiding_dropdown",{chosen:this})),this.results_showing=!1},Chosen.prototype.set_tab_index=function(){var a;return this.form_field.tabIndex?(a=this.form_field.tabIndex,this.form_field.tabIndex=-1,this.search_field.tabIndex=a):void 0},Chosen.prototype.set_label_behavior=function(){var a=this;return this.form_field_label=this.form_field.up("label"),null==this.form_field_label&&(this.form_field_label=$$("label[for='"+this.form_field.id+"']").first()),null!=this.form_field_label?this.form_field_label.observe("click",function(b){return a.is_multiple?a.container_mousedown(b):a.activate_field()}):void 0},Chosen.prototype.show_search_field_default=function(){return this.is_multiple&&this.choices_count()<1&&!this.active_field?(this.search_field.value=this.default_text,this.search_field.addClassName("default")):(this.search_field.value="",this.search_field.removeClassName("default"))},Chosen.prototype.search_results_mouseup=function(a){var b;return b=a.target.hasClassName("active-result")?a.target:a.target.up(".active-result"),b?(this.result_highlight=b,this.result_select(a),this.search_field.focus()):void 0},Chosen.prototype.search_results_mouseover=function(a){var b;return b=a.target.hasClassName("active-result")?a.target:a.target.up(".active-result"),b?this.result_do_highlight(b):void 0},Chosen.prototype.search_results_mouseout=function(a){return a.target.hasClassName("active-result")||a.target.up(".active-result")?this.result_clear_highlight():void 0},Chosen.prototype.choice_build=function(a){var b,c,d=this;return b=new Element("li",{"class":"search-choice"}).update("<span>"+a.html+"</span>"),a.disabled?b.addClassName("search-choice-disabled"):(c=new Element("a",{href:"#","class":"search-choice-close",rel:a.array_index}),c.observe("click",function(a){return d.choice_destroy_link_click(a)}),b.insert(c)),this.search_container.insert({before:b})},Chosen.prototype.choice_destroy_link_click=function(a){return a.preventDefault(),a.stopPropagation(),this.is_disabled?void 0:this.choice_destroy(a.target)},Chosen.prototype.choice_destroy=function(a){return this.result_deselect(a.readAttribute("rel"))?(this.show_search_field_default(),this.is_multiple&&this.choices_count()>0&&this.search_field.value.length<1&&this.results_hide(),a.up("li").remove(),this.search_field_scale()):void 0},Chosen.prototype.results_reset=function(){return this.form_field.options[0].selected=!0,this.selected_option_count=null,this.single_set_selected_text(),this.show_search_field_default(),this.results_reset_cleanup(),"function"==typeof Event.simulate&&this.form_field.simulate("change"),this.active_field?this.results_hide():void 0},Chosen.prototype.results_reset_cleanup=function(){var a;return this.current_selectedIndex=this.form_field.selectedIndex,a=this.selected_item.down("abbr"),a?a.remove():void 0},Chosen.prototype.result_select=function(a){var b,c,d;return this.result_highlight?(b=this.result_highlight,this.result_clear_highlight(),this.is_multiple&&this.max_selected_options<=this.choices_count()?(this.form_field.fire("chosen:maxselected",{chosen:this}),!1):(this.is_multiple?b.removeClassName("active-result"):(this.result_single_selected&&(this.result_single_selected.removeClassName("result-selected"),d=this.result_single_selected.getAttribute("data-option-array-index"),this.results_data[d].selected=!1),this.result_single_selected=b),b.addClassName("result-selected"),c=this.results_data[b.getAttribute("data-option-array-index")],c.selected=!0,this.form_field.options[c.options_index].selected=!0,this.selected_option_count=null,this.is_multiple?this.choice_build(c):this.single_set_selected_text(c.text),(a.metaKey||a.ctrlKey)&&this.is_multiple||this.results_hide(),this.search_field.value="","function"!=typeof Event.simulate||!this.is_multiple&&this.form_field.selectedIndex===this.current_selectedIndex||this.form_field.simulate("change"),this.current_selectedIndex=this.form_field.selectedIndex,this.search_field_scale())):void 0},Chosen.prototype.single_set_selected_text=function(a){return null==a&&(a=this.default_text),a===this.default_text?this.selected_item.addClassName("chosen-default"):(this.single_deselect_control_build(),this.selected_item.removeClassName("chosen-default")),this.selected_item.down("span").update(a)},Chosen.prototype.result_deselect=function(a){var b;return b=this.results_data[a],this.form_field.options[b.options_index].disabled?!1:(b.selected=!1,this.form_field.options[b.options_index].selected=!1,this.selected_option_count=null,this.result_clear_highlight(),this.results_showing&&this.winnow_results(),"function"==typeof Event.simulate&&this.form_field.simulate("change"),this.search_field_scale(),!0)},Chosen.prototype.single_deselect_control_build=function(){return this.allow_single_deselect?(this.selected_item.down("abbr")||this.selected_item.down("span").insert({after:'<abbr class="search-choice-close"></abbr>'}),this.selected_item.addClassName("chosen-single-with-deselect")):void 0},Chosen.prototype.get_search_text=function(){return this.search_field.value===this.default_text?"":this.search_field.value.strip().escapeHTML()},Chosen.prototype.winnow_results_set_highlight=function(){var a;return this.is_multiple||(a=this.search_results.down(".result-selected.active-result")),null==a&&(a=this.search_results.down(".active-result")),null!=a?this.result_do_highlight(a):void 0},Chosen.prototype.no_results=function(a){return this.search_results.insert(this.no_results_temp.evaluate({terms:a}))},Chosen.prototype.no_results_clear=function(){var a,b;for(a=null,b=[];a=this.search_results.down(".no-results");)b.push(a.remove());return b},Chosen.prototype.keydown_arrow=function(){var a;return this.results_showing&&this.result_highlight?(a=this.result_highlight.next(".active-result"))?this.result_do_highlight(a):void 0:this.results_show()},Chosen.prototype.keyup_arrow=function(){var a,b,c;return this.results_showing||this.is_multiple?this.result_highlight?(c=this.result_highlight.previousSiblings(),a=this.search_results.select("li.active-result"),b=c.intersect(a),b.length?this.result_do_highlight(b.first()):(this.choices_count()>0&&this.results_hide(),this.result_clear_highlight())):void 0:this.results_show()},Chosen.prototype.keydown_backstroke=function(){var a;return this.pending_backstroke?(this.choice_destroy(this.pending_backstroke.down("a")),this.clear_backstroke()):(a=this.search_container.siblings().last(),a&&a.hasClassName("search-choice")&&!a.hasClassName("search-choice-disabled")?(this.pending_backstroke=a,this.pending_backstroke&&this.pending_backstroke.addClassName("search-choice-focus"),this.single_backstroke_delete?this.keydown_backstroke():this.pending_backstroke.addClassName("search-choice-focus")):void 0)},Chosen.prototype.clear_backstroke=function(){return this.pending_backstroke&&this.pending_backstroke.removeClassName("search-choice-focus"),this.pending_backstroke=null},Chosen.prototype.keydown_checker=function(a){var b,c;switch(b=null!=(c=a.which)?c:a.keyCode,this.search_field_scale(),8!==b&&this.pending_backstroke&&this.clear_backstroke(),b){case 8:this.backstroke_length=this.search_field.value.length;break;case 9:this.results_showing&&!this.is_multiple&&this.result_select(a),this.mouse_on_container=!1;break;case 13:a.preventDefault();break;case 38:a.preventDefault(),this.keyup_arrow();break;case 40:a.preventDefault(),this.keydown_arrow()}},Chosen.prototype.search_field_scale=function(){var a,b,c,d,e,f,g,h,i;if(this.is_multiple){for(c=0,g=0,e="position:absolute; left: -1000px; top: -1000px; display:none;",f=["font-size","font-style","font-weight","font-family","line-height","text-transform","letter-spacing"],h=0,i=f.length;i>h;h++)d=f[h],e+=d+":"+this.search_field.getStyle(d)+";";return a=new Element("div",{style:e}).update(this.search_field.value.escapeHTML()),document.body.appendChild(a),g=Element.measure(a,"width")+25,a.remove(),b=this.container.getWidth(),g>b-10&&(g=b-10),this.search_field.setStyle({width:g+"px"})}},Chosen}(AbstractChosen)}.call(this);