@progress/kendo-ui/umd/kendo.treeview.min.js

This package is part of the [Kendo UI for jQuery](http://www.telerik.com/kendo-ui) suite.

!function(e){"function"==typeof define&&define.amd?define(["kendo.data.min","kendo.treeview.draganddrop.min","kendo.html.input.min","kendo.icons.min"],e):e()}((function(){!function(e,t){var n,r,i,a,s,o=window.kendo,d=o.ui,l=o.data,c=o.htmlEncode,h=e.extend,u=o.template,p=Array.isArray,f=d.Widget,g=l.HierarchicalDataSource,m=o.keys,k=".kendoTreeView",v=".kendoTreeViewTemp",_="select",b="check",x="navigate",C="change",w="error",y="checked",S="indeterminate",N="dragstart",I="drag",T="drop",D="dragend",A="dataBound",B="itemsLoaded",E="loadCompleted",H="requestEnd",O="click",q="undefined",L="k-hover",U="k-treeview",V=".k-item",F="k-toggle-icon",R="<span class='k-toggle-icon'></span>",P="string",j="aria-checked",M="aria-selected",G="aria-disabled",Q="aria-expanded",W="aria-activedescendant",J="aria-busy",X="k-disabled",Y={text:"dataTextField",url:"dataUrlField",spriteCssClass:"dataSpriteCssClassField",imageUrl:"dataImageUrlField"},$=function(e){return"object"==typeof HTMLElement?e instanceof HTMLElement:e&&"object"==typeof e&&1===e.nodeType&&typeof e.nodeName===P};function z(e){return function(t){var n=t.children(".k-animation-container");return n.length||(n=t),n.children(e)}}function K(e){return e.find(".k-checkbox-wrapper:first input[type=checkbox]")}function Z(e){return function(t,n){var r,i=(n=n.closest(V)).parent();return i.parent().is("li")&&(r=i.parent()),this._dataSourceMove(t,i,r,(function(t,r){var i=this.dataItem(n),a=i&&n.parent().children().length!==i.parent().length?i.parent().indexOf(i):n.index();return this._insert(t.data(),r,a+e)}))}}function ee(t){var n=t.children("div"),r=t.children("ul"),i=n.find(".k-treeview-toggle > ."+F),a=t.children("input[type=checkbox]"),d=n.children(".k-in");t.hasClass("k-treeview")||(n.length||(n=e("<div />").prependTo(t)),!i.length&&r.length?i=e("<span class='k-treeview-toggle'>"+R+"</span>").prependTo(n):r.length&&r.children().length||(i.parent().remove(),r.remove(),t.removeAttr(Q)),a.length&&e("<span class='k-checkbox-wrapper' />").appendTo(n).append(a),d.length||((d=t.children("a").eq(0).addClass("k-in k-link")).length||(d=e("<span class='k-treeview-leaf k-in' />")),d.appendTo(n),n.length&&function(e,t){for(var n;e&&"ul"!=e.nodeName.toLowerCase();)n=e,e=e.nextSibling,3==n.nodeType&&(n.nodeValue=o.trim(n.nodeValue)),s.test(n.className)?t.insertBefore(n,t.firstChild):t.appendChild(n)}(n[0].nextSibling,d[0])))}r=z(".k-group"),i=z(".k-group,.k-content"),a=function(e){return e.children("div").find(".k-treeview-toggle > ."+F)},s=/k-sprite/,n=o.ui.DataBoundWidget.extend({init:function(e,t){var n,r,i=this,a=t&&!!t.dataSource;p(t)&&(t={dataSource:t}),t&&typeof t.loadOnDemand==q&&p(t.dataSource)&&(t.loadOnDemand=!1),f.prototype.init.call(i,e,t),e=i.element,t=i.options,i._dataSourceUids={},r=e.is("ul")&&e||e.hasClass(U)&&e.children("ul"),(n=!a&&r.length)&&(t.dataSource.list=r),i._animation(),i._accessors(),i._templates(),e.hasClass(U)?(i.wrapper=e,i.root=e.children("ul").eq(0)):(i._wrapper(),r&&(i.root=e,i._group(i.wrapper))),i._applyCssClasses(),i._tabindex(),i.wrapper.attr("role","tree"),i.wrapper.find(">ul").attr("role","none"),i._dataSource(n),i._attachEvents(),i._dragging(),n?i._syncHtmlAndDataSource():t.autoBind&&(i._progress(!0),i.dataSource.fetch(this._attemptLoadCompleted.bind(this))),t.checkboxes&&t.checkboxes.checkChildren&&i.updateIndeterminate(),i.element[0].id?i._ariaId=o.format("{0}_tv_active",i.element[0].id):i._ariaId=o.guid()+"_tv_active",o.notify(i)},_attachEvents:function(){var t=this,n=".k-in:not(.k-selected,.k-disabled)",r="mouseenter";t._clickHandler=t._click.bind(t),t.wrapper.on(r+k,".k-in.k-selected",(function(e){e.preventDefault()})).on(r+k,n,(function(){e(this).addClass(L)})).on("mouseleave"+k,n,(function(){e(this).removeClass(L)})).on(O+k,n,t._clickHandler).on("dblclick"+k,".k-in:not(.k-disabled)",t._toggleButtonClick.bind(t)).on(O+k,"."+F,t._toggleButtonClick.bind(t)).on("keydown"+k,t,t._keydown.bind(t)).on("keypress"+k,t._keypress.bind(t)).on("focus"+k,t._focus.bind(t)).on("blur"+k,t._blur.bind(t)).on("mousedown"+k,".k-in,.k-checkbox-wrapper :checkbox,."+F,t._mousedown.bind(t)).on("change"+k,".k-checkbox-wrapper :checkbox",t._checkboxChange.bind(t)).on("click"+k,".k-request-retry",t._retryRequest.bind(t)).on("click"+k,".k-link.k-disabled",(function(e){e.preventDefault()})).on("click"+k,(function(n){var r=e(n.target);r.is(":kendoFocusable")||r.find("input,select,textarea,button,object").is(":kendoFocusable")||t.focus()}))},_syncHtmlAndDataSource:function(e,t){e=e||this.root;var n,r,i,a,s,d=(t=t||this.dataSource).view(),l=o.attr("uid"),c=o.attr("expanded"),h=this.options.checkboxes,u=e.children("li");for(n=0;n<u.length;n++)a=(i=d[n]).uid,(r=u.eq(n)).attr("role","treeitem").attr(l,a).attr(M,r.hasClass("k-selected")),i.expanded="true"===r.attr(c),i.hasChildren&&r.attr(Q,i.expanded),h&&(s=K(r),i.checked=s.prop(y),s.attr("id","_"+a),s.next(".k-checkbox-label").attr("for","_"+a),r.attr(j,r.checked)),this._syncHtmlAndDataSource(r.children("ul"),i.children)},_animation:function(){var e=this.options,t=e.animation,n=t.collapse&&"effects"in t.collapse,r=h({},t.expand,t.collapse);n||(r=h(r,{reverse:!0})),!1===t&&(t={expand:{effects:{}},collapse:{hide:!0,effects:{}}}),t.collapse=h(r,{hide:!0}),e.animation=t},_dragging:function(){var t=this.options.dragAndDrop,n=this.dragging;if(t&&!n){var r=this;this.dragging=new d.HierarchicalDragAndDrop(this.element,{reorderable:!0,$angular:this.options.$angular,autoScroll:this.options.autoScroll,filter:"div:not(.k-disabled) .k-in",allowedContainers:".k-treeview",itemSelector:".k-treeview .k-item",hintText:this._hintText.bind(this),contains:function(t,n){return e.contains(t,n)},dropHintContainer:function(e){return e},itemFromTarget:function(e){var t=e.closest(".k-treeview-top,.k-treeview-mid,.k-treeview-bot");return{item:t,content:e.closest(".k-in"),first:t.hasClass("k-treeview-top"),last:t.hasClass("k-treeview-bot")}},dropPositionFrom:function(e){return e.prevAll(".k-in").length>0?"after":"before"},dragstart:function(e){return r.wrapper.attr(o.attr("scrollable"),!1),r.trigger(N,{sourceNode:e[0]})},drag:function(e){r.trigger(I,{originalEvent:e.originalEvent,sourceNode:e.source[0],dropTarget:e.target[0],pageY:e.pageY,pageX:e.pageX,statusClass:e.status,setStatusClass:e.setStatus})},drop:function(t){var n=e(t.dropTarget).closest("a");return n&&n.attr("href")&&r._tempPreventNavigation(n),r.trigger(T,{originalEvent:t.originalEvent,sourceNode:t.source,destinationNode:t.destination,valid:t.valid,setValid:function(e){this.valid=e,t.setValid(e)},dropTarget:t.dropTarget,dropPosition:t.position})},dragend:function(e){var t=e.source,n=e.destination,i=e.position;function a(t){r.options.checkboxes&&r.options.checkboxes.checkChildren&&r.updateIndeterminate(),r.current(t),r.element.focus(),r.trigger(D,{originalEvent:e.originalEvent,sourceNode:t&&t[0],destinationNode:n[0],dropPosition:i})}r.wrapper.removeAttr(o.attr("scrollable")),"over"==i?r.append(t,n,a):("before"==i?t=r.insertBefore(t,n):"after"==i&&(t=r.insertAfter(t,n)),a(t))}})}else!t&&n&&(n.destroy(),this.dragging=null)},_tempPreventNavigation:function(e){e.on(O+k+v,(function(t){t.preventDefault(),e.off(O+k+v)}))},_hintText:function(e){return this.templates.dragClue({item:this.dataItem(e),treeview:this.options})},_templates:function(){var t=this,n=t.options,r=t._fieldAccessor.bind(t);n.template&&typeof n.template==P?n.template=u(n.template):n.template||(n.template=function(e){var t=e.item,n=r("text")(t);return void 0!==t.encoded&&!1===t.encoded?"<span class='k-treeview-leaf-text'>"+n+"</span>":"<span class='k-treeview-leaf-text'>"+c(n)+"</span>"}),t._checkboxes(),t.templates={setAttributes:function(e){var t="",n=e.attr||{};for(var r in n)n.hasOwnProperty(r)&&"class"!==r&&(t+=r+'="'+n[r]+'" ');return t},wrapperCssClass:function(e,t){var n="k-item k-treeview-item",r=t.index;return e.firstLevel&&0===r&&(n+=" k-first"),r==e.length-1&&(n+=" k-last"),n},cssClass:function(e,t){var n="",r=t.index,i=e.length-1;return e.firstLevel&&0===r&&(n+="k-treeview-top "),n+=0===r&&r!=i?"k-treeview-top":r==i?"k-treeview-bot":"k-treeview-mid"},textClass:function(e,t){var n="k-treeview-leaf k-in";return t&&(n+=" k-link"),!1===e.enabled&&(n+=" k-disabled"),!0===e.selected&&(n+=" k-selected"),n},checkboxClass:function(e){var t="k-checkbox";return!1===e.enabled&&(t+=" k-disabled"),t},toggleButtonClass:function(e){var t="k-treeview-toggle";return!1===e.enabled&&(t+=" k-disabled"),t},toggleIcon:function(e,t){return!0!==t.expanded?d.icon(e,{icon:"caret-alt-right"}):d.icon(e,{icon:"caret-alt-down"})},groupAttributes:function(e){var t="";return e.firstLevel||(t="role='group'"),t+(!0!==e.expanded?" style='display:none'":"")},groupCssClass:function(e){var t="k-group k-treeview-group";return e.firstLevel&&(t+=" k-treeview-lines"),t},dragClue:function(e){return e.treeview.template(e)},group:function(e){return"<ul class='"+e.r.groupCssClass(e.group)+"'"+e.r.groupAttributes(e.group)+">"+e.renderItems(e)+"</ul>"},itemContent:function(e){var t=r("imageUrl")(e.item),n=r("spriteCssClass")(e.item),i="";return t&&(i+="<img class='k-image' alt='' src='"+t+"'>"),n&&(i+="<span class='k-sprite "+n+"'></span>"),i+=e.treeview.template(e)},itemElement:function(t){var n=t.item,i=t.r,a=r("url")(n),s=a?"a":"span",o=a?' href="'+a+'"':"",d='<div class="'+i.cssClass(t.group,n)+'">';return n.hasChildren&&(d+="<span class='"+i.toggleButtonClass(n)+"'>"+i.toggleIcon(e(R),n)+"</span>"),t.treeview.checkboxes&&(d+="<span class='k-checkbox-wrapper' role='presentation'>"+t.treeview.checkboxes.template(t)+"</span>"),d+="<"+s+" class='"+i.textClass(n,!!a)+"'"+o+">"+i.itemContent(t)+"</"+s+">",d+="</div>"},item:function(e){var t=e.item,n=e.r,r="<li role='treeitem' class=\""+n.wrapperCssClass(e.group,t)+'"'+o.attr("uid")+'="'+t.uid+'"'+n.setAttributes(t.toJSON?t.toJSON():t)+" ";return e.treeview.checkboxes&&(r+='aria-checked="'+(t.checked?"true":"false")+'" '),r+='aria-selected="'+(t.selected?"true":"false")+'" '+(!1===t.enabled?'aria-disabled="true"':""),t.hasChildren&&(r+='aria-expanded="'+(t.expanded?"true":"false")+'" '),r+='data-expanded="'+(t.expanded?"true":"false")+'" >'+n.itemElement(e)+"</li>"},loading:function(e){var t=e.messages;return"<div class='k-icon k-i-loading'></div> "+c(t.loading)},retry:function(e){var t=e.messages;return c(t.requestFailed)+" <button class='k-button k-button-md k-rounded-md k-button-solid k-button-solid-base k-request-retry'><span class='k-button-text'>"+c(t.retry)+"</span></button>"}}},items:function(){return this.element.find(".k-item > div:first-child")},setDataSource:function(e){var t=this.options;t.dataSource=e,this._dataSourceUids={},this._dataSource(),t.checkboxes&&t.checkboxes.checkChildren&&this.dataSource.one("change",this.updateIndeterminate.bind(this,null)),this.options.autoBind&&this.dataSource.fetch(this._attemptLoadCompleted.bind(this))},_bindDataSource:function(){var e=this;e._refreshHandler=e.refresh.bind(e),e._errorHandler=e._error.bind(e),e._loadCompletedHandler=e._loadCompleted.bind(e),e._requestEndHandler=e._dsRequestEnd.bind(e),e._loadedNodes=[],e.dataSource.bind(C,e._refreshHandler),e.dataSource.bind(w,e._errorHandler),e.dataSource.bind(B,e._loadCompletedHandler),e.dataSource.bind(H,e._requestEndHandler)},_dsRequestEnd:function(e){var t=this;setTimeout((function(){"read"!==e.type||t._loadCompletedFired||t._attemptLoadCompleted()}))},_loadCompleted:function(e){var t=this;t._loadedNodes=t._loadedNodes.concat(e.nodes),t.dataSource.loading()||!1!==t.options.loadOnDemand||(t.trigger(E,{nodes:t._loadedNodes}),t._loadedNodes=[])},_attemptLoadCompleted:function(){var e,t,n=this,r=n.dataSource.view();if(!1===n.options.loadOnDemand){for(t=0;t<r.length;t++)if((e=r[t]).hasChildren&&(!e.children||!e.children.data()||0===e.children.data().length))return;n._loadCompletedFired=!0,n.trigger(E,{nodes:[]})}},_unbindDataSource:function(){var e=this.dataSource;e&&(e.unbind(C,this._refreshHandler),e.unbind(w,this._errorHandler),e.unbind(B,this._loadCompletedHandler),e.unbind(H,this._requestEndHandler))},_dataSource:function(e){var t=this,n=t.options.dataSource;n=p(n)?{data:n}:n,t._unbindDataSource(),n.fields||(n.fields=[{field:"text"},{field:"url"},{field:"spriteCssClass"},{field:"imageUrl"}]),t.dataSource=n=g.create(n),e&&(n.fetch(),function e(t){for(var n=0;n<t.length;n++)t[n]._initChildren(),t[n].children.fetch(),e(t[n].children.view())}(n.view())),t._bindDataSource()},events:[N,I,T,D,A,E,"expand","collapse",_,C,x,b,"kendoKeydown"],options:{name:"TreeView",dataSource:{},animation:{expand:{effects:"expand:vertical",duration:200},collapse:{duration:100}},messages:{loading:"Loading...",requestFailed:"Request failed.",retry:"Retry"},dragAndDrop:!1,checkboxes:!1,autoBind:!0,autoScroll:!1,loadOnDemand:!0,template:"",dataTextField:null,size:"medium"},_accessors:function(){var e,t,n,r=this.options,i=this.element;for(e in Y)t=r[Y[e]],n=i.attr(o.attr(e+"-field")),!t&&n&&(t=n),t||(t=e),p(t)||(t=[t]),r[Y[e]]=t},_fieldAccessor:function(t){var n=this.options[Y[t]],r=n.length;return function(i){return 0===r?o.getter(t)(i):e.map(n,(function(e){return function(t){return o.getter(e)(t)}}))[Math.min(i.level(),r-1)](i)}},setOptions:function(e){f.fn.setOptions.call(this,e),this._animation(),this._dragging(),this._accessors(),this._templates()},_trigger:function(e,t){return this.trigger(e,{node:t.closest(V)[0]})},_setChecked:function(e,t){if(e&&o.isFunction(e.view))for(var n=0,r=e.view();n<r.length;n++)!1!==r[n].enabled&&this._setCheckedValue(r[n],t),r[n].children&&this._setChecked(r[n].children,t)},_setCheckedValue:function(e,t){e.checked=t},_setIndeterminate:function(e){var t,n,i,a=r(e),s=!0;if(a.length&&(n=(t=K(a.children())).length)){if(n>1){for(i=1;i<n;i++)if(t[i].checked!=t[i-1].checked||t[i].indeterminate||t[i-1].indeterminate){s=!1;break}}else s=!t[0].indeterminate;return e.attr(j,s?t[0].checked:"mixed"),K(e).data(S,!s).prop(S,!s).prop(y,s&&t[0].checked)}},updateIndeterminate:function(e){e=e||this.wrapper;var t,n,i,a=r(e).children();if(a.length){for(t=0;t<a.length;t++)this.updateIndeterminate(a.eq(t));if(e.is(".k-treeview"))return;n=this._setIndeterminate(e),i=this.dataItem(e),n&&n.prop(y)?i.checked=!0:i&&delete i.checked}},_bubbleIndeterminate:function(e,t){if(e.length){t||this.updateIndeterminate(e);var n,r=this.parent(e);r.length&&(this._setIndeterminate(r),n=r.children("div").find(".k-checkbox-wrapper input[type=checkbox]"),this._skip=!0,!1===n.prop(S)?this.dataItem(r).set(y,n.prop(y)):this.dataItem(r).set(y,!1),this._skip=!1,this._bubbleIndeterminate(r,!0))}},_checkboxChange:function(t){var n=e(t.target),r=n.prop(y),i=n.closest(V),a=this.dataItem(i);this._preventChange||(a.checked!=r&&(a.set(y,r),i.attr(j,r),this._trigger(b,i)),n.is(":focus")&&(this._trigger(x,i),this.focus()))},_toggleButtonClick:function(t){var n=e(t.currentTarget).closest(V);n.is("[aria-disabled='true']")||this.toggle(n)},_mousedown:function(t){var n=this,r=e(t.currentTarget),i=e(t.currentTarget).closest(V),a=o.support.browser;i.is("[aria-disabled='true']")||((a.msie||a.edge)&&r.is(":checkbox")&&(r.prop(S)?(n._preventChange=!1,r.prop(y,!r.prop(y)),r.trigger(C),r.on(O+k,(function(e){e.preventDefault()})),n._preventChange=!0):(r.off(O+k),n._preventChange=!1)),n._clickTarget=i,n.current(i))},_focusable:function(e){return e&&e.length&&e.is(":visible")&&!e.find(".k-in").first().hasClass(X)},_focus:function(){var t=this.select(),n=this._clickTarget;o.support.touch||(n&&n.length&&(t=n),this._focusable(t)||(t=this.current()),this._focusable(t)||(t=this._nextVisible(e())),this.current(t))},focus:function(){var e,t=this.wrapper,n=t[0],r=[],i=[],a=document.documentElement;do{(n=n.parentNode).scrollHeight>n.clientHeight&&(r.push(n),i.push(n.scrollTop))}while(n!=a);for(o.focusElement(t),e=0;e<r.length;e++)r[e].scrollTop=i[e]},_blur:function(){this.current().find(".k-in").first().removeClass("k-focus")},_enabled:function(e){return!e.children("div").children(".k-in").hasClass(X)},parent:function(t){var n,r,i=/\bk-treeview\b(?!-)/,a=/\bk-item\b/;typeof t==P&&(t=this.element.find(t)),$(t)||(t=t[0]),r=a.test(t.className);do{t=t.parentNode,a.test(t.className)&&(r?n=t:r=!0)}while(!i.test(t.className)&&!n);return e(n)},_nextVisible:function(e){var t,n=this,i=n._expanded(e);function a(e){for(;e.length&&!e.next().length;)e=n.parent(e);return e.next().length?e.next():e}return e.length&&e.is(":visible")?i&&(t=r(e).children().first()).length||(t=a(e)):t=n.root.children().eq(0),t},_previousVisible:function(e){var t,n,i=this;if(!e.length||e.prev().length)for(n=e.length?e.prev():i.root.children().last();i._expanded(n)&&(t=r(n).children().last()).length;)n=t;else n=i.parent(e)||e;return n},_keydown:function(n){var r,i=this,a=n.keyCode,s=i.current(),d=i._expanded(s),l=s.find(".k-checkbox-wrapper").first().find(":checkbox"),c=o.support.isRtl(i.element);n.target==n.currentTarget&&(!c&&a==m.RIGHT||c&&a==m.LEFT?d?r=i._nextVisible(s):s.find(".k-in").first().hasClass(X)||i.expand(s):!c&&a==m.LEFT||c&&a==m.RIGHT?d&&!s.find(".k-in").first().hasClass(X)?i.collapse(s):(r=i.parent(s),i._enabled(r)||(r=t)):a==m.DOWN?r=i._nextVisible(s):a==m.UP?r=i._previousVisible(s):a==m.HOME?r=i._nextVisible(e()):a==m.END?r=i._previousVisible(e()):a!=m.ENTER||s.find(".k-in").first().hasClass(X)?a==m.SPACEBAR&&l.length&&(s.find(".k-in").first().hasClass(X)||(l.prop(y,!l.prop(y)).data(S,!1).prop(S,!1),i._checkboxChange({target:l})),r=s):s.find(".k-in").first().hasClass("k-selected")||i._trigger(_,s)||i.select(s),r&&(n.preventDefault(),s[0]!=r[0]&&(i._trigger(x,r),i.current(r))))},_keypress:function(e){var 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