moodle/lib/amd/build/tree.min.js

define(["jquery"],function(a){var b={ITEM:"[role=treeitem]",GROUP:"[role=treeitem]:has([role=group]), [role=treeitem][data-requires-ajax=true]",CLOSED_GROUP:"[role=treeitem]:has([role=group])[aria-expanded=false], [role=treeitem][data-requires-ajax=true][aria-expanded=false]",FIRST_ITEM:"[role=treeitem]:first",VISIBLE_ITEM:"[role=treeitem]:visible",UNLOADED_AJAX_ITEM:"[role=treeitem][data-requires-ajax=true][data-loaded=false][aria-expanded=true]"},c=function(c,d){this.treeRoot=a(c),this.treeRoot.data("activeItem",null),this.selectCallback=d,this.keys={tab:9,enter:13,space:32,pageup:33,pagedown:34,end:35,home:36,left:37,up:38,right:39,down:40,asterisk:106},this.initialiseNodes(this.treeRoot),this.setActiveItem(this.treeRoot.find(b.FIRST_ITEM)),this.refreshVisibleItemsCache(),this.bindEventHandlers()};return c.prototype.refreshVisibleItemsCache=function(){this.treeRoot.data("visibleItems",this.treeRoot.find(b.VISIBLE_ITEM))},c.prototype.getVisibleItems=function(){return this.treeRoot.data("visibleItems")},c.prototype.setActiveItem=function(a){var b=this.treeRoot.data("activeItem");a!==b&&(b&&(b.attr("tabindex","-1"),b.attr("aria-selected","false")),a.attr("tabindex","0"),a.attr("aria-selected","true"),this.treeRoot.data("activeItem",a),"function"==typeof this.selectCallback&&this.selectCallback(a))},c.prototype.isGroupItem=function(a){return a.is(b.GROUP)},c.prototype.isGroupCollapsed=function(a){return"false"===a.attr("aria-expanded")},c.prototype.isGroupCollapsible=function(a){return"false"!==a.attr("data-collapsible")},c.prototype.initialiseNodes=function(c){this.removeAllFromTabOrder(c),this.setAriaSelectedFalseOnItems(c);var d=this;c.find(b.UNLOADED_AJAX_ITEM).each(function(){var b=a(this);d.collapseGroup(b),d.expandGroup(b)})},c.prototype.removeAllFromTabOrder=function(a){a.find("*").attr("tabindex","-1")},c.prototype.setAriaSelectedFalseOnItems=function(a){a.find(b.ITEM).attr("aria-selected","false")},c.prototype.expandAllGroups=function(){this.expandAllChildGroups(this.treeRoot)},c.prototype.expandAllChildGroups=function(c){var d=this;c.find(b.CLOSED_GROUP).each(function(){var b=a(this);d.expandGroup(b).done(function(){d.expandAllChildGroups(b)})})},c.prototype.expandGroup=function(b){var c=a.Deferred();if("false"!==b.attr("data-expandable")&&this.isGroupCollapsed(b))if("true"===b.attr("data-requires-ajax")&&"true"!==b.attr("data-loaded")){b.attr("data-loaded",!1);var d=b.closest("[data-ajax-loader]").attr("data-ajax-loader"),e=this;b.addClass("loading"),require([d],function(a){a.load(b).done(function(){b.attr("data-loaded",!0),e.initialiseNodes(b),e.finishExpandingGroup(b),b.removeClass("loading"),c.resolve()})})}else this.finishExpandingGroup(b),c.resolve();else c.resolve();return c},c.prototype.finishExpandingGroup=function(a){var c=a.children(b.GROUP);c.show().attr("aria-hidden","false"),a.attr("aria-expanded","true"),this.refreshVisibleItemsCache()},c.prototype.collapseGroup=function(a){if(this.isGroupCollapsible(a)&&!this.isGroupCollapsed(a)){var c=a.children(b.GROUP);c.hide().attr("aria-hidden","true"),a.attr("aria-expanded","false"),this.refreshVisibleItemsCache()}},c.prototype.toggleGroup=function(a){"true"===a.attr("aria-expanded")?this.collapseGroup(a):this.expandGroup(a)},c.prototype.handleKeyDown=function(a,c){var d=this.getVisibleItems().index(a);if(c.altKey||c.ctrlKey||c.shiftKey&&c.keyCode!=this.keys.tab)return!0;switch(c.keyCode){case this.keys.home:return this.getVisibleItems().first().focus(),c.stopPropagation(),!1;case this.keys.end:return this.getVisibleItems().last().focus(),c.stopPropagation(),!1;case this.keys.enter:var e=a.children().not(b.GROUP).children("a");return e.length?window.location.href=e.first().attr("href"):this.isGroupItem(a)&&this.toggleGroup(a,!0),c.stopPropagation(),!1;case this.keys.space:return this.isGroupItem(a)&&this.toggleGroup(a,!0),c.stopPropagation(),!1;case this.keys.left:var f=function(c){var d=c.getVisibleItems().filter(b.GROUP).has(a).last();d.focus()};return this.isGroupItem(a)?this.isGroupCollapsed(a)?f(this):this.collapseGroup(a):f(this),c.stopPropagation(),!1;case this.keys.right:return this.isGroupItem(a)&&(this.isGroupCollapsed(a)?this.expandGroup(a):a.find(b.ITEM).first().focus()),c.stopPropagation(),!1;case this.keys.up:if(d>0){var g=this.getVisibleItems().eq(d-1);g.focus()}return c.stopPropagation(),!1;case this.keys.down:if(d<this.getVisibleItems().length-1){var h=this.getVisibleItems().eq(d+1);h.focus()}return c.stopPropagation(),!1;case this.keys.asterisk:return this.expandAllGroups(),c.stopPropagation(),!1}return!0},c.prototype.handleClick=function(a,b){return b.altKey||b.ctrlKey||b.shiftKey?!0:(a.focus(),this.isGroupItem(a)&&this.toggleGroup(a),b.stopPropagation(),!0)},c.prototype.handleFocus=function(a,b){return this.setActiveItem(a),b.stopPropagation(),!0},c.prototype.bindEventHandlers=function(){var c=this;this.treeRoot.on({click:function(b){return c.handleClick(a(this),b)},keydown:function(b){return c.handleKeyDown(a(this),b)},focus:function(b){return c.handleFocus(a(this),b)}},b.ITEM)},c});