@xeokit/xeokit-sdk/dist/xeokit-sdk.es5.js

3D BIM IFC Viewer SDK for AEC engineering applications. Open Source JavaScript Toolkit based on pure WebGL for top performance, real-world coordinates and full double precision

/**
 * xeokit-sdk v2.6.78
 *  Commit: 17c76751873b26ec38b03ae632f1d2003dc7a98a
 *  Built: 2025-06-18T11:33:48.212Z
 */

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ret=this.s["return"];return void 0===ret?Promise.resolve({value:value,done:!0}):AsyncFromSyncIteratorContinuation(ret.apply(this.s,arguments));},"throw":function _throw(value){var thr=this.s["return"];return void 0===thr?Promise.reject(value):AsyncFromSyncIteratorContinuation(thr.apply(this.s,arguments));}},new AsyncFromSyncIterator(s);}/** @private */var Map$1=/*#__PURE__*/function(){function Map$1(items,baseId){_classCallCheck(this,Map$1);this.items=items||[];this._lastUniqueId=(baseId||0)+1;}/**
     * Usage:
     *
     * id = myMap.addItem("foo") // ID internally generated
     * id = myMap.addItem("foo", "bar") // ID is "foo"
     */_createClass(Map$1,[{key:"addItem",value:function addItem(){var item;if(arguments.length===2){var id=arguments[0];item=arguments[1];if(this.items[id]){// Won't happen if given ID is string
throw"ID clash: '"+id+"'";}this.items[id]=item;return id;}else{item=arguments[0]||{};while(true){var findId=this._lastUniqueId++;if(!this.items[findId]){this.items[findId]=item;return findId;}}}}},{key:"removeItem",value:function removeItem(id){var item=this.items[id];delete this.items[id];return item;}}]);return Map$1;}();var idMap=new Map$1();/**
 * Internal data class that represents the state of a menu or a submenu.
 * @private
 */var Menu=/*#__PURE__*/_createClass(function Menu(id){_classCallCheck(this,Menu);this.id=id;this.parentItem=null;// Set to an Item when this Menu is a submenu
this.groups=[];this.menuElement=null;this.shown=false;this.mouseOver=0;});/**
 * Internal data class that represents a group of Items in a Menu.
 * @private
 */var Group=/*#__PURE__*/_createClass(function Group(){_classCallCheck(this,Group);this.items=[];});/**
 * Internal data class that represents the state of a menu item.
 * @private
 */var Item=/*#__PURE__*/_createClass(function Item(id,getTitle,doAction,getEnabled,getShown){_classCallCheck(this,Item);this.id=id;this.getTitle=getTitle;this.doAction=doAction;this.getEnabled=getEnabled;this.getShown=getShown;this.itemElement=null;this.subMenu=null;this.enabled=true;});/**
 * @desc A customizable HTML context menu.
 *
 * [<img src="http://xeokit.io/img/docs/ContextMenu/ContextMenu.gif">](https://xeokit.github.io/xeokit-sdk/examples/index.html#ContextMenu_Canvas_TreeViewPlugin_Custom)
 *
 * * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#ContextMenu_Canvas_TreeViewPlugin_Custom)]
 *
 * ## Overview
 *
 * * A pure JavaScript, lightweight context menu
 * * Dynamically configure menu items
 * * Dynamically enable or disable items
 * * Dynamically show or hide items
 * * Supports cascading sub-menus
 * * Configure custom style with CSS (see examples above)
 *
 * ## Usage
 *
 * In the example below we'll create a ````ContextMenu```` that pops up whenever we right-click on an {@link Entity} within
 * our {@link Scene}.
 *
 * First, we'll create the ````ContextMenu````, configuring it with a list of menu items.
 *
 * Each item has:
 *
 * * a ````title```` for the item,
 * * a ````doAction()```` callback to fire when the item's title is clicked,
 * * an optional ````getShown()```` callback that indicates if the item should shown in the menu or not, and
 * * an optional ````getEnabled()```` callback that indicates if the item should be shown enabled in the menu or not.
 *
 * <br>
 *
 * The ````getShown()```` and ````getEnabled()```` callbacks are invoked whenever the menu is shown.
 *
 * When an item's ````getShown()```` callback
 * returns ````true````, then the item is shown. When it returns ````false````, then the item is hidden. An item without
 * a ````getShown()```` callback is always shown.
 *
 * When an item's ````getEnabled()```` callback returns ````true````, then the item is enabled and clickable (as long as it's also shown). When it
 * returns ````false````, then the item is disabled and cannot be clicked. An item without a ````getEnabled()````
 * callback is always enabled and clickable.
 *
 * Note how the ````doAction()````,  ````getShown()```` and ````getEnabled()```` callbacks accept a ````context````
 * object. That must be set on the ````ContextMenu```` before we're able to we show it. The context object can be anything. In this example,
 * we'll use the context object to provide the callbacks with the Entity that we right-clicked.
 *
 * We'll also initially enable the ````ContextMenu````.
 *
 * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#ContextMenu_Canvas_Custom)]
 *
 * ````javascript
 * const canvasContextMenu = new ContextMenu({
 *
 *    enabled: true,
 *
 *    items: [
 *       [
 *          {
 *             title: "Hide Object",
 *             getEnabled: (context) => {
 *                 return context.entity.visible; // Can't hide entity if already hidden
 *             },
 *             doAction: function (context) {
 *                 context.entity.visible = false;
 *             }
 *          }
 *       ],
 *       [
 *          {
 *             title: "Select Object",
 *             getEnabled: (context) => {
 *                 return (!context.entity.selected); // Can't select an entity that's already selected
 *             },
 *             doAction: function (context) {
 *                 context.entity.selected = true;
 *             }
 *          }
 *       ],
 *       [
 *          {
 *             title: "X-Ray Object",
 *             getEnabled: (context) => {
 *                 return (!context.entity.xrayed); // Can't X-ray an entity that's already X-rayed
 *             },
 *             doAction: (context) => {
 *                 context.entity.xrayed = true;
 *             }
 *          }
 *       ]
 *    ]
 * });
 * ````
 *
 * Next, we'll make the ````ContextMenu```` appear whenever we right-click on an Entity. Whenever we right-click
 * on the canvas, we'll attempt to pick the Entity at those mouse coordinates. If we succeed, we'll feed the
 * Entity into ````ContextMenu```` via the context object, then show the ````ContextMenu````.
 *
 * From there, each ````ContextMenu```` item's ````getEnabled()```` callback will be invoked (if provided), to determine if the item should
 * be enabled. If we click an item, its ````doAction()```` callback will be invoked with our context object.
 *
 * Remember that we must set the context on our ````ContextMenu```` before we show it, otherwise it will log an error to the console,
 * and ignore our attempt to show it.
 *
 * ````javascript*
 * viewer.scene.canvas.canvas.oncontextmenu = (e) => { // Right-clicked on the canvas
 *
 *     if (!objectContextMenu.enabled) {
 *         return;
 *     }
 *
 *     var hit = viewer.scene.pick({ // Try to pick an Entity at the coordinates
 *         canvasPos: [e.pageX, e.pageY]
 *     });
 *
 *     if (hit) { // Picked an Entity
 *
 *         objectContextMenu.context = { // Feed entity to ContextMenu
 *             entity: hit.entity
 *         };
 *
 *         objectContextMenu.show(e.pageX, e.pageY); // Show the ContextMenu
 *     }
 *
 *     e.preventDefault();
 * });
 * ````
 *
 * Note how we only show the ````ContextMenu```` if it's enabled. We can use that mechanism to switch between multiple
 * ````ContextMenu```` instances depending on what we clicked.
 *
 * ## Dynamic Item Titles
 *
 * To make an item dynamically regenerate its title text whenever we show the ````ContextMenu````, provide its title with a
 * ````getTitle()```` callback. The callback will fire each time you show ````ContextMenu````, which will dynamically
 * set the item title text.
 *
 * In the example below, we'll create a simple ````ContextMenu```` that allows us to toggle the selection of an object
 * via its first item, which changes text depending on whether we are selecting or deselecting the object.
 *
 * [[Run an example](https://xeokit.github.io/xeokit-sdk/examples/index.html#ContextMenu_dynamicItemTitles)]
 *
 * ````javascript
 * const canvasContextMenu = new ContextMenu({
 *
 *    enabled: true,
 *
 *    items: [
 *       [
 *          {
 *              getTitle: (context) => {
 *                  return (!context.entity.selected) ? "Select" : "Undo Select";
 *              },
 *              doAction: function (context) {
 *                  context.entity.selected = !context.entity.selected;
 *              }
 *          },
 *          {
 *              title: "Clear Selection",
 *              getEnabled: function (context) {
 *                  return (context.viewer.scene.numSelectedObjects > 0);
 *              },
 *              doAction: function (context) {
 *                  context.viewer.scene.setObjectsSelected(context.viewer.scene.selectedObjectIds, false);
 *              }
 *          }
 *       ]
 *    ]
 * });
 * ````
 *
 * ## Sub-menus
 *
 * Each menu item can optionally have a sub-menu, which will appear when we hover over the item.
 *
 * In the example below, we'll create a much simpler ````ContextMenu```` that has only one item, called "Effects", which
 * will open a cascading sub-menu whenever we hover over that item.
 *
 * Note that our "Effects" item has no ````doAction```` callback, because an item with a sub-menu performs no
 * action of its own.
 *
 * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#ContextMenu_subMenus)]
 *
 * ````javascript
 * const canvasContextMenu = new ContextMenu({
 *     items: [ // Top level items
 *         [
 *             {
 *                 getTitle: (context) => {
 *                     return "Effects";
 *                 },
 *
 *                 items: [ // Sub-menu
 *                     [
 *                         {
 *                             getTitle: (context) => {
 *                                 return (!context.entity.visible) ? "Show" : "Hide";
 *                             },
 *                             doAction: function (context) {
 *                                 context.entity.visible = !context.entity.visible;
 *                             }
 *                         },
 *                         {
 *                             getTitle: (context) => {
 *                                 return (!context.entity.selected) ? "Select" : "Undo Select";
 *                             },
 *                             doAction: function (context) {
 *                                 context.entity.selected = !context.entity.selected;
 *                             }
 *                         },
 *                         {
 *                             getTitle: (context) => {
 *                                 return (!context.entity.highlighted) ? "Highlight" : "Undo Highlight";
 *                             },
 *                             doAction: function (context) {
 *                                 context.entity.highlighted = !context.entity.highlighted;
 *                             }
 *                         }
 *                     ]
 *                 ]
 *             }
 *          ]
 *      ]
 * });
 * ````
 */var ContextMenu=/*#__PURE__*/function(){/**
     * Creates a ````ContextMenu````.
     *
     * The ````ContextMenu```` will be initially hidden.
     *
     * @param {Object} [cfg] ````ContextMenu```` configuration.
     * @param {Object} [cfg.items] The context menu items. These can also be dynamically set on {@link ContextMenu#items}. See the class documentation for an example.
     * @param {Object} [cfg.context] The context, which is passed into the item callbacks. This can also be dynamically set on {@link ContextMenu#context}. This must be set before calling {@link ContextMenu#show}.
     * @param {Boolean} [cfg.enabled=true] Whether this ````ContextMenu```` is initially enabled. {@link ContextMenu#show} does nothing while this is ````false````.
     * @param {Boolean} [cfg.hideOnMouseDown=true] Whether this ````ContextMenu```` automatically hides whenever we mouse-down or tap anywhere in the page.
     * @param {Boolean} [cfg.hideOnAction=true] Whether this ````ContextMenu```` automatically hides after we select a menu item. Se false if we want the menu to remain shown and show any updates to its item titles, after we've selected an item.
     * @param {Node | undefined} [cfg.parentNode] Optional reference to an existing DOM Node (e.g. ShadowRoot), to which the menu's HTML element will be appended, defaults to ````document.body````.
     */function ContextMenu(){var _this2=this;var cfg=arguments.length>0&&arguments[0]!==undefined?arguments[0]:{};_classCallCheck(this,ContextMenu);this._id=idMap.addItem();this._context=null;this._enabled=false;// True when the ContextMenu is enabled
this._itemsCfg=[];// Items as given as configs
this._rootMenu=null;// The root Menu in the tree
this._menuList=[];// List of Menus
this._menuMap={};// Menus mapped to their IDs
this._itemList=[];// List of Items
this._itemMap={};// Items mapped to their IDs
this._shown=false;// True when the ContextMenu is visible
this._nextId=0;this._parentNode=cfg.parentNode||document.body;this._offsetParent=this._parentNode instanceof ShadowRoot?this._parentNode.host:this._parentNode;/**
         * Subscriptions to events fired at this ContextMenu.
         * @private
         */this._eventSubs={};if(cfg.hideOnMouseDown!==false){this._parentNode.addEventListener("mousedown",function(event){if(!event.target.classList.contains("xeokit-context-menu-item")){_this2.hide();}});this._parentNode.addEventListener("touchstart",this._canvasTouchStartHandler=function(event){if(!event.target.classList.contains("xeokit-context-menu-item")){_this2.hide();}});}if(cfg.items){this.items=cfg.items;}this._hideOnAction=cfg.hideOnAction!==false;this.context=cfg.context;this.enabled=cfg.enabled!==false;this.hide();}/**
     Subscribes to an event fired at this ````ContextMenu````.

     @param {String} event The event
     @param {Function} callback Callback fired on the event
     */_createClass(ContextMenu,[{key:"on",value:function on(event,callback){var subs=this._eventSubs[event];if(!subs){subs=[];this._eventSubs[event]=subs;}subs.push(callback);}/**
     Fires an event at this ````ContextMenu````.

     @param {String} event The event type name
     @param {Object} value The event parameters
     */},{key:"fire",value:function fire(event,value){var subs=this._eventSubs[event];if(subs){for(var _i2=0,len=subs.length;_i2<len;_i2++){subs[_i2](value);}}}/**
     * Sets the ````ContextMenu```` items.
     *
     * These can be updated dynamically at any time.
     *
     * See class documentation for an example.
     *
     * @type {Object[]}
     */},{key:"items",get:/**
     * Gets the ````ContextMenu```` items.
     *
     * @type {Object[]}
     */function get(){return this._itemsCfg;}/**
     * Sets whether this ````ContextMenu```` is enabled.
     *
     * Hides the menu when disabling.
     *
     * @type {Boolean}
     */,set:function set(itemsCfg){this._clear();this._itemsCfg=itemsCfg||[];this._parseItems(itemsCfg);this._createUI();}},{key:"enabled",get:/**
     * Gets whether this ````ContextMenu```` is enabled.
     *
     * {@link ContextMenu#show} does nothing while this is ````false````.
     *
     * @type {Boolean}
     */function get(){return this._enabled;}/**
     * Sets the ````ContextMenu```` context.
     *
     * The context can be any object that you need to be provides to the callbacks configured on {@link ContextMenu#items}.
     *
     * This must be set before calling {@link ContextMenu#show}.
     *
     * @type {Object}
     */,set:function set(enabled){enabled=!!enabled;if(enabled===this._enabled){return;}this._enabled=enabled;if(!this._enabled){this.hide();}}},{key:"context",get:/**
     * Gets the ````ContextMenu```` context.
     *
     * @type {Object}
     */function get(){return this._context;}/**
     * Shows this ````ContextMenu```` at the given page coordinates.
     *
     * Does nothing when {@link ContextMenu#enabled} is ````false````.
     *
     * Logs error to console and does nothing if {@link ContextMenu#context} has not been set.
     *
     * Fires a "shown" event when shown.
     *
     * @param {Number} pageX Page X-coordinate.
     * @param {Number} pageY Page Y-coordinate.
     */,set:function set(context){this._context=context;}},{key:"show",value:function show(pageX,pageY){if(!this._context){console.error("ContextMenu cannot be shown without a context - set context first");return;}if(!this._enabled){return;}if(this._shown){return;}this._hideAllMenus();this._updateItemsTitles();this._updateItemsEnabledStatus();this._showMenu(this._rootMenu.id,pageX,pageY);this._updateSubMenuInfo();this._shown=true;this.fire("shown",{});}/**
     * Gets whether this ````ContextMenu```` is currently shown or not.
     *
     * @returns {Boolean} Whether this ````ContextMenu```` is shown.
     */},{key:"shown",get:function get(){return this._shown;}/**
     * Hides this ````ContextMenu````.
     *
     * Fires a "hidden" event when hidden.
     */},{key:"hide",value:function hide(){if(!this._enabled){return;}if(!this._shown){return;}this._hideAllMenus();this._shown=false;this.fire("hidden",{});}/**
     * Destroys this ````ContextMenu````.
     */},{key:"destroy",value:function destroy(){this._context=null;this._clear();if(this._id!==null){idMap.removeItem(this._id);this._id=null;}}},{key:"_clear",value:function _clear(){// Destroys DOM elements, clears menu data
for(var _i3=0,len=this._menuList.length;_i3<len;_i3++){var menu=this._menuList[_i3];var menuElement=menu.menuElement;menuElement.remove();}this._itemsCfg=[];this._rootMenu=null;this._menuList=[];this._menuMap={};this._itemList=[];this._itemMap={};}},{key:"_parseItems",value:function _parseItems(itemsCfg){var _this3=this;// Parses "items" config into menu data
var visitItems=function visitItems(itemsCfg){var menuId=_this3._getNextId();var menu=new Menu(menuId);for(var _i4=0,len=itemsCfg.length;_i4<len;_i4++){var itemsGroupCfg=itemsCfg[_i4];var group=new Group();menu.groups.push(group);var _loop=function _loop(j,lenj){var itemCfg=itemsGroupCfg[j];var subItemsCfg=itemCfg.items;var hasSubItems=subItemsCfg&&subItemsCfg.length>0;var itemId=_this3._getNextId();var getTitle=itemCfg.getTitle||function(){return itemCfg.title||"";};var doAction=itemCfg.doAction||itemCfg.callback||function(){};var getEnabled=itemCfg.getEnabled||function(){return true;};var getShown=itemCfg.getShown||function(){return true;};var item=new Item(itemId,getTitle,doAction,getEnabled,getShown);item.parentMenu=menu;group.items.push(item);if(hasSubItems){var subMenu=visitItems(subItemsCfg);item.subMenu=subMenu;subMenu.parentItem=item;}_this3._itemList.push(item);_this3._itemMap[item.id]=item;};for(var j=0,lenj=itemsGroupCfg.length;j<lenj;j++){_loop(j,lenj);}}_this3._menuList.push(menu);_this3._menuMap[menu.id]=menu;return menu;};this._rootMenu=visitItems(itemsCfg);}},{key:"_getNextId",value:function _getNextId(){// Returns a unique ID
return"ContextMenu_"+this._id+"_"+this._nextId++;// Start ID with alpha chars to make a valid DOM element selector
}},{key:"_createUI",value:function _createUI(){var _this4=this;// Builds DOM elements for the entire menu tree
var visitMenu=function visitMenu(menu){_this4._createMenuUI(menu);var groups=menu.groups;for(var _i5=0,len=groups.length;_i5<len;_i5++){var group=groups[_i5];var groupItems=group.items;for(var j=0,lenj=groupItems.length;j<lenj;j++){var item=groupItems[j];var subMenu=item.subMenu;if(subMenu){visitMenu(subMenu);}}}};visitMenu(this._rootMenu);}},{key:"_createMenuUI",value:function _createMenuUI(menu){var _this5=this;// Builds DOM elements for a menu
var groups=menu.groups;var html=[];var menuElement=document.createElement("div");menuElement.classList.add("xeokit-context-menu",menu.id);menuElement.style.zIndex=300000;menuElement.style.position="absolute";html.push('<ul>');if(groups){for(var _i6=0,len=groups.length;_i6<len;_i6++){var group=groups[_i6];var groupIdx=_i6;var groupLen=len;var groupItems=group.items;if(groupItems){for(var j=0,lenj=groupItems.length;j<lenj;j++){var item=groupItems[j];var itemSubMenu=item.subMenu;var actionTitle=item.title||"";if(itemSubMenu){html.push('<li id="'+item.id+'" class="xeokit-context-menu-item xeokit-context-menu-submenu">'+actionTitle+'</li>');if(!(groupIdx===groupLen-1||j<lenj-1)){html.push('<li id="'+item.id+'" class="xeokit-context-menu-item-separator"></li>');}}else{html.push('<li id="'+item.id+'" class="xeokit-context-menu-item">'+actionTitle+'</li>');if(!(groupIdx===groupLen-1||j<lenj-1)){html.push('<li id="'+item.id+'" class="xeokit-context-menu-item-separator"></li>');}}}}}}html.push('</ul>');var htmlString=html.join("");menuElement.innerHTML=htmlString;this._parentNode.appendChild(menuElement);menu.menuElement=menuElement;menuElement.style["border-radius"]=4+"px";menuElement.style.display='none';menuElement.style["z-index"]=300000;menuElement.style.background="white";menuElement.style.border="1px solid black";menuElement.style["box-shadow"]="0 4px 5px 0 gray";menuElement.oncontextmenu=function(e){e.preventDefault();};// Bind event handlers
var self=this;var lastSubMenu=null;if(groups){for(var _i7=0,_len=groups.length;_i7<_len;_i7++){var _group=groups[_i7];var _groupItems=_group.items;if(_groupItems){var _loop2=function _loop2(_j2,_lenj){var item=_groupItems[_j2];var itemSubMenu=item.subMenu;item.itemElement=_this5._parentNode.querySelector("#".concat(item.id));if(!item.itemElement){console.error("ContextMenu item element not found: "+item.id);return"continue";}item.itemElement.addEventListener("mouseenter",function(event){event.preventDefault();var subMenu=item.subMenu;if(!subMenu){if(lastSubMenu){self._hideMenu(lastSubMenu.id);lastSubMenu=null;}return;}if(lastSubMenu&&lastSubMenu.id!==subMenu.id){self._hideMenu(lastSubMenu.id);lastSubMenu=null;}if(item.enabled===false){return;}var itemElement=item.itemElement;var subMenuElement=subMenu.menuElement;var itemRect=itemElement.getBoundingClientRect();subMenuElement.getBoundingClientRect();var offsetRect=self._offsetParent.getBoundingClientRect();var subMenuWidth=200;// TODO
var showOnRight=itemRect.right+subMenuWidth<offsetRect.right;var showOnLeft=itemRect.left-subMenuWidth>offsetRect.left;if(showOnRight)self._showMenu(subMenu.id,itemRect.right+window.scrollX-5,itemRect.top+window.scrollY-1);else if(showOnLeft)self._showMenu(subMenu.id,itemRect.left-subMenuWidth+window.scrollX,itemRect.top+window.scrollY-1);else{var spaceOnLeft=itemRect.left-offsetRect.left,spaceOnRight=offsetRect.right-itemRect.right;if(spaceOnRight>spaceOnLeft)self._showMenu(subMenu.id,itemRect.right-5-(subMenuWidth-spaceOnRight),itemRect.top+window.scrollY-1);else self._showMenu(subMenu.id,itemRect.left-spaceOnLeft,itemRect.top+window.scrollY-1);}lastSubMenu=subMenu;});if(!itemSubMenu){// Item without sub-menu
// clicking item fires the item's action callback
item.itemElement.addEventListener("click",function(event){event.preventDefault();if(!self._context){return;}if(item.enabled===false){return;}if(item.doAction){item.doAction(self._context);}if(_this5._hideOnAction){self.hide();}else{self._updateItemsTitles();self._updateItemsEnabledStatus();}});item.itemElement.addEventListener("mouseup",function(event){if(event.which!==3){return;}event.preventDefault();if(!self._context){return;}if(item.enabled===false){return;}if(item.doAction){item.doAction(self._context);}if(_this5._hideOnAction){self.hide();}else{self._updateItemsTitles();self._updateItemsEnabledStatus();}});item.itemElement.addEventListener("mouseenter",function(event){event.preventDefault();if(item.enabled===false){return;}if(item.doHover){item.doHover(self._context);}});}};for(var _j2=0,_lenj=_groupItems.length;_j2<_lenj;_j2++){var _ret=_loop2(_j2,_lenj);if(_ret==="continue")continue;}}}}}},{key:"_updateItemsTitles",value:function _updateItemsTitles(){// Dynamically updates the title of each Item to the result of Item#getTitle()
if(!this._context){return;}for(var _i8=0,len=this._itemList.length;_i8<len;_i8++){var item=this._itemList[_i8];var itemElement=item.itemElement;if(!itemElement){continue;}var getShown=item.getShown;if(!getShown||!getShown(this._context)){continue;}var title=item.getTitle(this._context);if(item.subMenu){itemElement.innerText=title;}else{itemElement.innerText=title;}}}},{key:"_updateItemsEnabledStatus",value:function _updateItemsEnabledStatus(){// Enables or disables each Item, depending on the result of Item#getEnabled()
if(!this._context){return;}for(var _i9=0,len=this._itemList.length;_i9<len;_i9++){var item=this._itemList[_i9];var itemElement=item.itemElement;if(!itemElement){continue;}var getEnabled=item.getEnabled;if(!getEnabled){continue;}var getShown=item.getShown;if(!getShown){continue;}var shown=getShown(this._context);item.shown=shown;if(!shown){itemElement.style.display="none";continue;}else{itemElement.style.display="";}var enabled=getEnabled(this._context);item.enabled=enabled;if(!enabled){itemElement.classList.add("disabled");}else{itemElement.classList.remove("disabled");}}}},{key:"_updateSubMenuInfo",value:function _updateSubMenuInfo(){if(!this._context)return;var itemElement,itemRect,subMenuElement,initialStyles,showOnLeft,subMenuWidth;this._itemList.forEach(function(item){if(item.subMenu){itemElement=item.itemElement;itemRect=itemElement.getBoundingClientRect();subMenuElement=item.subMenu.menuElement;initialStyles={visibility:subMenuElement.style.visibility,display:subMenuElement.style.display};subMenuElement.style.display="block";subMenuElement.style.visibility="hidden";subMenuWidth=item.subMenu.menuElement.getBoundingClientRect().width;subMenuElement.style.visibility=initialStyles.visibility;subMenuElement.style.display=initialStyles.display;showOnLeft=itemRect.right+subMenuWidth>window.innerWidth;itemElement.setAttribute("data-submenuposition",showOnLeft?"left":"right");}});}},{key:"_showMenu",value:function _showMenu(menuId,pageX,pageY){// Shows the given menu, at the specified page coordinates
var menu=this._menuMap[menuId];if(!menu){console.error("Menu not found: "+menuId);return;}if(menu.shown){return;}var menuElement=menu.menuElement;if(menuElement){this._showMenuElement(menuElement,pageX,pageY);menu.shown=true;}}},{key:"_hideMenu",value:function _hideMenu(menuId){// Hides the given menu
var menu=this._menuMap[menuId];if(!menu){console.error("Menu not found: "+menuId);return;}if(!menu.shown){return;}var menuElement=menu.menuElement;if(menuElement){this._hideMenuElement(menuElement);menu.shown=false;}}},{key:"_hideAllMenus",value:function _hideAllMenus(){for(var _i10=0,len=this._menuList.length;_i10<len;_i10++){var menu=this._menuList[_i10];this._hideMenu(menu.id);}}},{key:"_showMenuElement",value:function _showMenuElement(menuElement,pageX,pageY){// Shows the given menu element, at the specified page coordinates
menuElement.style.display='block';var menuHeight=menuElement.offsetHeight;var menuWidth=menuElement.offsetWidth;var offsetRect=this._offsetParent.getBoundingClientRect();var bottomContainerBorder=offsetRect.bottom+window.scrollY;var rightContainerBorder=offsetRect.right+window.scrollX;if(pageY+menuHeight>bottomContainerBorder){pageY=bottomContainerBorder-menuHeight;}if(pageX+menuWidth>rightContainerBorder){pageX=rightContainerBorder-menuWidth;}menuElement.style.left=pageX-offsetRect.left-window.scrollX+'px';menuElement.style.top=pageY-offsetRect.top-window.scrollY+'px';}},{key:"_hideMenuElement",value:function _hideMenuElement(menuElement){menuElement.style.display='none';}}]);return ContextMenu;}();/**
 * A PointerLens shows a magnified view of a {@link Viewer}'s canvas, centered at the position of the
 * mouse or touch pointer.
 *
 * This component is used