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Edit File : menu.js \| Size : 18.52 KB
/! jQuery UI Menu 1.13.3 * https://jqueryui.com * * Copyright OpenJS Foundation and other contributors * Released under the MIT license. * https://jquery.org/license / //>>label: Menu //>>group: Widgets //>>description: Creates nestable menus. //>>docs: https://api.jqueryui.com/menu/ //>>demos: https://jqueryui.com/menu/ //>>css.structure: ../../themes/base/core.css //>>css.structure: ../../themes/base/menu.css //>>css.theme: ../../themes/base/theme.css ( function( factory ) { "use strict"; if ( typeof define === "function" && define.amd ) { // AMD. Register as an anonymous module. define( [ "jquery", "../keycode", "../position", "../safe-active-element", "../unique-id", "../version", "../widget" ], factory ); } else { // Browser globals factory( jQuery ); } } )( function( $ ) { "use strict"; return $.widget( "ui.menu", { version: "1.13.3", defaultElement: "<ul>", delay: 300, options: { icons: { submenu: "ui-icon-caret-1-e" }, items: "> ", menus: "ul", position: { my: "left top", at: "right top" }, role: "menu", // Callbacks blur: null, focus: null, select: null }, _create: function() { this.activeMenu = this.element; // Flag used to prevent firing of the click handler // as the event bubbles up through nested menus this.mouseHandled = false; this.lastMousePosition = { x: null, y: null }; this.element .uniqueId() .attr( { role: this.options.role, tabIndex: 0 } ); this._addClass( "ui-menu", "ui-widget ui-widget-content" ); this._on( { // Prevent focus from sticking to links inside menu after clicking // them (focus should always stay on UL during navigation). "mousedown .ui-menu-item": function( event ) { event.preventDefault(); this._activateItem( event ); }, "click .ui-menu-item": function( event ) { var target = $( event.target ); var active = $( $.ui.safeActiveElement( this.document[ 0 ] ) ); if ( !this.mouseHandled && target.not( ".ui-state-disabled" ).length ) { this.select( event ); // Only set the mouseHandled flag if the event will bubble, see #9469. if ( !event.isPropagationStopped() ) { this.mouseHandled = true; } // Open submenu on click if ( target.has( ".ui-menu" ).length ) { this.expand( event ); } else if ( !this.element.is( ":focus" ) && active.closest( ".ui-menu" ).length ) { // Redirect focus to the menu this.element.trigger( "focus", [ true ] ); // If the active item is on the top level, let it stay active. // Otherwise, blur the active item since it is no longer visible. if ( this.active && this.active.parents( ".ui-menu" ).length === 1 ) { clearTimeout( this.timer ); } } } }, "mouseenter .ui-menu-item": "_activateItem", "mousemove .ui-menu-item": "_activateItem", mouseleave: "collapseAll", "mouseleave .ui-menu": "collapseAll", focus: function( event, keepActiveItem ) { // If there's already an active item, keep it active // If not, activate the first item var item = this.active \|\| this._menuItems().first(); if ( !keepActiveItem ) { this.focus( event, item ); } }, blur: function( event ) { this._delay( function() { var notContained = !$.contains( this.element[ 0 ], $.ui.safeActiveElement( this.document[ 0 ] ) ); if ( notContained ) { this.collapseAll( event ); } } ); }, keydown: "_keydown" } ); this.refresh(); // Clicks outside of a menu collapse any open menus this._on( this.document, { click: function( event ) { if ( this._closeOnDocumentClick( event ) ) { this.collapseAll( event, true ); } // Reset the mouseHandled flag this.mouseHandled = false; } } ); }, _activateItem: function( event ) { // Ignore mouse events while typeahead is active, see #10458. // Prevents focusing the wrong item when typeahead causes a scroll while the mouse // is over an item in the menu if ( this.previousFilter ) { return; } // If the mouse didn't actually move, but the page was scrolled, ignore the event (#9356) if ( event.clientX === this.lastMousePosition.x && event.clientY === this.lastMousePosition.y ) { return; } this.lastMousePosition = { x: event.clientX, y: event.clientY }; var actualTarget = $( event.target ).closest( ".ui-menu-item" ), target = $( event.currentTarget ); // Ignore bubbled events on parent items, see #11641 if ( actualTarget[ 0 ] !== target[ 0 ] ) { return; } // If the item is already active, there's nothing to do if ( target.is( ".ui-state-active" ) ) { return; } // Remove ui-state-active class from siblings of the newly focused menu item // to avoid a jump caused by adjacent elements both having a class with a border this._removeClass( target.siblings().children( ".ui-state-active" ), null, "ui-state-active" ); this.focus( event, target ); }, _destroy: function() { var items = this.element.find( ".ui-menu-item" ) .removeAttr( "role aria-disabled" ), submenus = items.children( ".ui-menu-item-wrapper" ) .removeUniqueId() .removeAttr( "tabIndex role aria-haspopup" ); // Destroy (sub)menus this.element .removeAttr( "aria-activedescendant" ) .find( ".ui-menu" ).addBack() .removeAttr( "role aria-labelledby aria-expanded aria-hidden aria-disabled " + "tabIndex" ) .removeUniqueId() .show(); submenus.children().each( function() { var elem = $( this ); if ( elem.data( "ui-menu-submenu-caret" ) ) { elem.remove(); } } ); }, _keydown: function( event ) { var match, prev, character, skip, preventDefault = true; switch ( event.keyCode ) { case $.ui.keyCode.PAGE_UP: this.previousPage( event ); break; case $.ui.keyCode.PAGE_DOWN: this.nextPage( event ); break; case $.ui.keyCode.HOME: this._move( "first", "first", event ); break; case $.ui.keyCode.END: this._move( "last", "last", event ); break; case $.ui.keyCode.UP: this.previous( event ); break; case $.ui.keyCode.DOWN: this.next( event ); break; case $.ui.keyCode.LEFT: this.collapse( event ); break; case $.ui.keyCode.RIGHT: if ( this.active && !this.active.is( ".ui-state-disabled" ) ) { this.expand( event ); } break; case $.ui.keyCode.ENTER: case $.ui.keyCode.SPACE: this._activate( event ); break; case $.ui.keyCode.ESCAPE: this.collapse( event ); break; default: preventDefault = false; prev = this.previousFilter \|\| ""; skip = false; // Support number pad values character = event.keyCode >= 96 && event.keyCode <= 105 ? ( event.keyCode - 96 ).toString() : String.fromCharCode( event.keyCode ); clearTimeout( this.filterTimer ); if ( character === prev ) { skip = true; } else { character = prev + character; } match = this._filterMenuItems( character ); match = skip && match.index( this.active.next() ) !== -1 ? this.active.nextAll( ".ui-menu-item" ) : match; // If no matches on the current filter, reset to the last character pressed // to move down the menu to the first item that starts with that character if ( !match.length ) { character = String.fromCharCode( event.keyCode ); match = this._filterMenuItems( character ); } if ( match.length ) { this.focus( event, match ); this.previousFilter = character; this.filterTimer = this._delay( function() { delete this.previousFilter; }, 1000 ); } else { delete this.previousFilter; } } if ( preventDefault ) { event.preventDefault(); } }, _activate: function( event ) { if ( this.active && !this.active.is( ".ui-state-disabled" ) ) { if ( this.active.children( "[aria-haspopup='true']" ).length ) { this.expand( event ); } else { this.select( event ); } } }, refresh: function() { var menus, items, newSubmenus, newItems, newWrappers, that = this, icon = this.options.icons.submenu, submenus = this.element.find( this.options.menus ); this._toggleClass( "ui-menu-icons", null, !!this.element.find( ".ui-icon" ).length ); // Initialize nested menus newSubmenus = submenus.filter( ":not(.ui-menu)" ) .hide() .attr( { role: this.options.role, "aria-hidden": "true", "aria-expanded": "false" } ) .each( function() { var menu = $( this ), item = menu.prev(), submenuCaret = $( "<span>" ).data( "ui-menu-submenu-caret", true ); that._addClass( submenuCaret, "ui-menu-icon", "ui-icon " + icon ); item .attr( "aria-haspopup", "true" ) .prepend( submenuCaret ); menu.attr( "aria-labelledby", item.attr( "id" ) ); } ); this._addClass( newSubmenus, "ui-menu", "ui-widget ui-widget-content ui-front" ); menus = submenus.add( this.element ); items = menus.find( this.options.items ); // Initialize menu-items containing spaces and/or dashes only as dividers items.not( ".ui-menu-item" ).each( function() { var item = $( this ); if ( that._isDivider( item ) ) { that._addClass( item, "ui-menu-divider", "ui-widget-content" ); } } ); // Don't refresh list items that are already adapted newItems = items.not( ".ui-menu-item, .ui-menu-divider" ); newWrappers = newItems.children() .not( ".ui-menu" ) .uniqueId() .attr( { tabIndex: -1, role: this._itemRole() } ); this._addClass( newItems, "ui-menu-item" ) ._addClass( newWrappers, "ui-menu-item-wrapper" ); // Add aria-disabled attribute to any disabled menu item items.filter( ".ui-state-disabled" ).attr( "aria-disabled", "true" ); // If the active item has been removed, blur the menu if ( this.active && !$.contains( this.element[ 0 ], this.active[ 0 ] ) ) { this.blur(); } }, _itemRole: function() { return { menu: "menuitem", listbox: "option" }[ this.options.role ]; }, _setOption: function( key, value ) { if ( key === "icons" ) { var icons = this.element.find( ".ui-menu-icon" ); this._removeClass( icons, null, this.options.icons.submenu ) ._addClass( icons, null, value.submenu ); } this._super( key, value ); }, _setOptionDisabled: function( value ) { this._super( value ); this.element.attr( "aria-disabled", String( value ) ); this._toggleClass( null, "ui-state-disabled", !!value ); }, focus: function( event, item ) { var nested, focused, activeParent; this.blur( event, event && event.type === "focus" ); this._scrollIntoView( item ); this.active = item.first(); focused = this.active.children( ".ui-menu-item-wrapper" ); this._addClass( focused, null, "ui-state-active" ); // Only update aria-activedescendant if there's a role // otherwise we assume focus is managed elsewhere if ( this.options.role ) { this.element.attr( "aria-activedescendant", focused.attr( "id" ) ); } // Highlight active parent menu item, if any activeParent = this.active .parent() .closest( ".ui-menu-item" ) .children( ".ui-menu-item-wrapper" ); this._addClass( activeParent, null, "ui-state-active" ); if ( event && event.type === "keydown" ) { this._close(); } else { this.timer = this._delay( function() { this._close(); }, this.delay ); } nested = item.children( ".ui-menu" ); if ( nested.length && event && ( /^mouse/.test( event.type ) ) ) { this._startOpening( nested ); } this.activeMenu = item.parent(); this._trigger( "focus", event, { item: item } ); }, _scrollIntoView: function( item ) { var borderTop, paddingTop, offset, scroll, elementHeight, itemHeight; if ( this._hasScroll() ) { borderTop = parseFloat( $.css( this.activeMenu[ 0 ], "borderTopWidth" ) ) \|\| 0; paddingTop = parseFloat( $.css( this.activeMenu[ 0 ], "paddingTop" ) ) \|\| 0; offset = item.offset().top - this.activeMenu.offset().top - borderTop - paddingTop; scroll = this.activeMenu.scrollTop(); elementHeight = this.activeMenu.height(); itemHeight = item.outerHeight(); if ( offset < 0 ) { this.activeMenu.scrollTop( scroll + offset ); } else if ( offset + itemHeight > elementHeight ) { this.activeMenu.scrollTop( scroll + offset - elementHeight + itemHeight ); } } }, blur: function( event, fromFocus ) { if ( !fromFocus ) { clearTimeout( this.timer ); } if ( !this.active ) { return; } this._removeClass( this.active.children( ".ui-menu-item-wrapper" ), null, "ui-state-active" ); this._trigger( "blur", event, { item: this.active } ); this.active = null; }, _startOpening: function( submenu ) { clearTimeout( this.timer ); // Don't open if already open fixes a Firefox bug that caused a .5 pixel // shift in the submenu position when mousing over the caret icon if ( submenu.attr( "aria-hidden" ) !== "true" ) { return; } this.timer = this._delay( function() { this._close(); this._open( submenu ); }, this.delay ); }, _open: function( submenu ) { var position = $.extend( { of: this.active }, this.options.position ); clearTimeout( this.timer ); this.element.find( ".ui-menu" ).not( submenu.parents( ".ui-menu" ) ) .hide() .attr( "aria-hidden", "true" ); submenu .show() .removeAttr( "aria-hidden" ) .attr( "aria-expanded", "true" ) .position( position ); }, collapseAll: function( event, all ) { clearTimeout( this.timer ); this.timer = this._delay( function() { // If we were passed an event, look for the submenu that contains the event var currentMenu = all ? this.element : $( event && event.target ).closest( this.element.find( ".ui-menu" ) ); // If we found no valid submenu ancestor, use the main menu to close all // sub menus anyway if ( !currentMenu.length ) { currentMenu = this.element; } this._close( currentMenu ); this.blur( event ); // Work around active item staying active after menu is blurred this._removeClass( currentMenu.find( ".ui-state-active" ), null, "ui-state-active" ); this.activeMenu = currentMenu; }, all ? 0 : this.delay ); }, // With no arguments, closes the currently active menu - if nothing is active // it closes all menus. If passed an argument, it will search for menus BELOW _close: function( startMenu ) { if ( !startMenu ) { startMenu = this.active ? this.active.parent() : this.element; } startMenu.find( ".ui-menu" ) .hide() .attr( "aria-hidden", "true" ) .attr( "aria-expanded", "false" ); }, _closeOnDocumentClick: function( event ) { return !$( event.target ).closest( ".ui-menu" ).length; }, _isDivider: function( item ) { // Match hyphen, em dash, en dash return !/[^\-\u2014\u2013\s]/.test( item.text() ); }, collapse: function( event ) { var newItem = this.active && this.active.parent().closest( ".ui-menu-item", this.element ); if ( newItem && newItem.length ) { this._close(); this.focus( event, newItem ); } }, expand: function( event ) { var newItem = this.active && this._menuItems( this.active.children( ".ui-menu" ) ).first(); if ( newItem && newItem.length ) { this._open( newItem.parent() ); // Delay so Firefox will not hide activedescendant change in expanding submenu from AT this._delay( function() { this.focus( event, newItem ); } ); } }, next: function( event ) { this._move( "next", "first", event ); }, previous: function( event ) { this._move( "prev", "last", event ); }, isFirstItem: function() { return this.active && !this.active.prevAll( ".ui-menu-item" ).length; }, isLastItem: function() { return this.active && !this.active.nextAll( ".ui-menu-item" ).length; }, _menuItems: function( menu ) { return ( menu \|\| this.element ) .find( this.options.items ) .filter( ".ui-menu-item" ); }, _move: function( direction, filter, event ) { var next; if ( this.active ) { if ( direction === "first" \|\| direction === "last" ) { next = this.active [ direction === "first" ? "prevAll" : "nextAll" ]( ".ui-menu-item" ) .last(); } else { next = this.active [ direction + "All" ]( ".ui-menu-item" ) .first(); } } if ( !next \|\| !next.length \|\| !this.active ) { next = this._menuItems( this.activeMenu )[ filter ](); } this.focus( event, next ); }, nextPage: function( event ) { var item, base, height; if ( !this.active ) { this.next( event ); return; } if ( this.isLastItem() ) { return; } if ( this._hasScroll() ) { base = this.active.offset().top; height = this.element.innerHeight(); // jQuery 3.2 doesn't include scrollbars in innerHeight, add it back. if ( $.fn.jquery.indexOf( "3.2." ) === 0 ) { height += this.element[ 0 ].offsetHeight - this.element.outerHeight(); } this.active.nextAll( ".ui-menu-item" ).each( function() { item = $( this ); return item.offset().top - base - height < 0; } ); this.focus( event, item ); } else { this.focus( event, this._menuItems( this.activeMenu ) [ !this.active ? "first" : "last" ]() ); } }, previousPage: function( event ) { var item, base, height; if ( !this.active ) { this.next( event ); return; } if ( this.isFirstItem() ) { return; } if ( this._hasScroll() ) { base = this.active.offset().top; height = this.element.innerHeight(); // jQuery 3.2 doesn't include scrollbars in innerHeight, add it back. if ( $.fn.jquery.indexOf( "3.2." ) === 0 ) { height += this.element[ 0 ].offsetHeight - this.element.outerHeight(); } this.active.prevAll( ".ui-menu-item" ).each( function() { item = $( this ); return item.offset().top - base + height > 0; } ); this.focus( event, item ); } else { this.focus( event, this._menuItems( this.activeMenu ).first() ); } }, _hasScroll: function() { return this.element.outerHeight() < this.element.prop( "scrollHeight" ); }, select: function( event ) { // TODO: It should never be possible to not have an active item at this // point, but the tests don't trigger mouseenter before click. this.active = this.active \|\| $( event.target ).closest( ".ui-menu-item" ); var ui = { item: this.active }; if ( !this.active.has( ".ui-menu" ).length ) { this.collapseAll( event, true ); } this._trigger( "select", event, ui ); }, _filterMenuItems: function( character ) { var escapedCharacter = character.replace( /[\-\[\]{}()*+?.,\\\^$\|#\s]/g, "\\$&" ), regex = new RegExp( "^" + escapedCharacter, "i" ); return this.activeMenu .find( this.options.items ) // Only match on items, not dividers or other content (#10571) .filter( ".ui-menu-item" ) .filter( function() { return regex.test( String.prototype.trim.call( $( this ).children( ".ui-menu-item-wrapper" ).text() ) ); } ); } } ); } ); Back

Edit File : menu.js | Size : 18.52 KB

/*!
 * jQuery UI Menu 1.13.3
 * https://jqueryui.com
 *
 * Copyright OpenJS Foundation and other contributors
 * Released under the MIT license.
 * https://jquery.org/license
 */

//>>label: Menu
//>>group: Widgets
//>>description: Creates nestable menus.
//>>docs: https://api.jqueryui.com/menu/
//>>demos: https://jqueryui.com/menu/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/menu.css
//>>css.theme: ../../themes/base/theme.css

( function( factory ) {
	"use strict";

if ( typeof define === "function" && define.amd ) {

// AMD. Register as an anonymous module.
		define( [
			"jquery",
			"../keycode",
			"../position",
			"../safe-active-element",
			"../unique-id",
			"../version",
			"../widget"
		], factory );
	} else {

// Browser globals
		factory( jQuery );
	}
} )( function( $ ) {
"use strict";

return $.widget( "ui.menu", {
	version: "1.13.3",
	defaultElement: "<ul>",
	delay: 300,
	options: {
		icons: {
			submenu: "ui-icon-caret-1-e"
		},
		items: "> *",
		menus: "ul",
		position: {
			my: "left top",
			at: "right top"
		},
		role: "menu",

// Callbacks
		blur: null,
		focus: null,
		select: null
	},

_create: function() {
		this.activeMenu = this.element;

// Flag used to prevent firing of the click handler
		// as the event bubbles up through nested menus
		this.mouseHandled = false;
		this.lastMousePosition = { x: null, y: null };
		this.element
			.uniqueId()
			.attr( {
				role: this.options.role,
				tabIndex: 0
			} );

this._addClass( "ui-menu", "ui-widget ui-widget-content" );
		this._on( {

// Prevent focus from sticking to links inside menu after clicking
			// them (focus should always stay on UL during navigation).
			"mousedown .ui-menu-item": function( event ) {
				event.preventDefault();

this._activateItem( event );
			},
			"click .ui-menu-item": function( event ) {
				var target = $( event.target );
				var active = $( $.ui.safeActiveElement( this.document[ 0 ] ) );
				if ( !this.mouseHandled && target.not( ".ui-state-disabled" ).length ) {
					this.select( event );

// Only set the mouseHandled flag if the event will bubble, see #9469.
					if ( !event.isPropagationStopped() ) {
						this.mouseHandled = true;
					}

// Open submenu on click
					if ( target.has( ".ui-menu" ).length ) {
						this.expand( event );
					} else if ( !this.element.is( ":focus" ) &&
							active.closest( ".ui-menu" ).length ) {

// Redirect focus to the menu
						this.element.trigger( "focus", [ true ] );

// If the active item is on the top level, let it stay active.
						// Otherwise, blur the active item since it is no longer visible.
						if ( this.active && this.active.parents( ".ui-menu" ).length === 1 ) {
							clearTimeout( this.timer );
						}
					}
				}
			},
			"mouseenter .ui-menu-item": "_activateItem",
			"mousemove .ui-menu-item": "_activateItem",
			mouseleave: "collapseAll",
			"mouseleave .ui-menu": "collapseAll",
			focus: function( event, keepActiveItem ) {

// If there's already an active item, keep it active
				// If not, activate the first item
				var item = this.active || this._menuItems().first();

if ( !keepActiveItem ) {
					this.focus( event, item );
				}
			},
			blur: function( event ) {
				this._delay( function() {
					var notContained = !$.contains(
						this.element[ 0 ],
						$.ui.safeActiveElement( this.document[ 0 ] )
					);
					if ( notContained ) {
						this.collapseAll( event );
					}
				} );
			},
			keydown: "_keydown"
		} );

this.refresh();

// Clicks outside of a menu collapse any open menus
		this._on( this.document, {
			click: function( event ) {
				if ( this._closeOnDocumentClick( event ) ) {
					this.collapseAll( event, true );
				}

// Reset the mouseHandled flag
				this.mouseHandled = false;
			}
		} );
	},

_activateItem: function( event ) {

// Ignore mouse events while typeahead is active, see #10458.
		// Prevents focusing the wrong item when typeahead causes a scroll while the mouse
		// is over an item in the menu
		if ( this.previousFilter ) {
			return;
		}

// If the mouse didn't actually move, but the page was scrolled, ignore the event (#9356)
		if ( event.clientX === this.lastMousePosition.x &&
				event.clientY === this.lastMousePosition.y ) {
			return;
		}

this.lastMousePosition = {
			x: event.clientX,
			y: event.clientY
		};

var actualTarget = $( event.target ).closest( ".ui-menu-item" ),
			target = $( event.currentTarget );

// Ignore bubbled events on parent items, see #11641
		if ( actualTarget[ 0 ] !== target[ 0 ] ) {
			return;
		}

// If the item is already active, there's nothing to do
		if ( target.is( ".ui-state-active" ) ) {
			return;
		}

// Remove ui-state-active class from siblings of the newly focused menu item
		// to avoid a jump caused by adjacent elements both having a class with a border
		this._removeClass( target.siblings().children( ".ui-state-active" ),
			null, "ui-state-active" );
		this.focus( event, target );
	},

_destroy: function() {
		var items = this.element.find( ".ui-menu-item" )
				.removeAttr( "role aria-disabled" ),
			submenus = items.children( ".ui-menu-item-wrapper" )
				.removeUniqueId()
				.removeAttr( "tabIndex role aria-haspopup" );

// Destroy (sub)menus
		this.element
			.removeAttr( "aria-activedescendant" )
			.find( ".ui-menu" ).addBack()
				.removeAttr( "role aria-labelledby aria-expanded aria-hidden aria-disabled " +
					"tabIndex" )
				.removeUniqueId()
				.show();

submenus.children().each( function() {
			var elem = $( this );
			if ( elem.data( "ui-menu-submenu-caret" ) ) {
				elem.remove();
			}
		} );
	},

_keydown: function( event ) {
		var match, prev, character, skip,
			preventDefault = true;

switch ( event.keyCode ) {
		case $.ui.keyCode.PAGE_UP:
			this.previousPage( event );
			break;
		case $.ui.keyCode.PAGE_DOWN:
			this.nextPage( event );
			break;
		case $.ui.keyCode.HOME:
			this._move( "first", "first", event );
			break;
		case $.ui.keyCode.END:
			this._move( "last", "last", event );
			break;
		case $.ui.keyCode.UP:
			this.previous( event );
			break;
		case $.ui.keyCode.DOWN:
			this.next( event );
			break;
		case $.ui.keyCode.LEFT:
			this.collapse( event );
			break;
		case $.ui.keyCode.RIGHT:
			if ( this.active && !this.active.is( ".ui-state-disabled" ) ) {
				this.expand( event );
			}
			break;
		case $.ui.keyCode.ENTER:
		case $.ui.keyCode.SPACE:
			this._activate( event );
			break;
		case $.ui.keyCode.ESCAPE:
			this.collapse( event );
			break;
		default:
			preventDefault = false;
			prev = this.previousFilter || "";
			skip = false;

// Support number pad values
			character = event.keyCode >= 96 && event.keyCode <= 105 ?
				( event.keyCode - 96 ).toString() : String.fromCharCode( event.keyCode );

clearTimeout( this.filterTimer );

if ( character === prev ) {
				skip = true;
			} else {
				character = prev + character;
			}

match = this._filterMenuItems( character );
			match = skip && match.index( this.active.next() ) !== -1 ?
				this.active.nextAll( ".ui-menu-item" ) :
				match;

// If no matches on the current filter, reset to the last character pressed
			// to move down the menu to the first item that starts with that character
			if ( !match.length ) {
				character = String.fromCharCode( event.keyCode );
				match = this._filterMenuItems( character );
			}

if ( match.length ) {
				this.focus( event, match );
				this.previousFilter = character;
				this.filterTimer = this._delay( function() {
					delete this.previousFilter;
				}, 1000 );
			} else {
				delete this.previousFilter;
			}
		}

if ( preventDefault ) {
			event.preventDefault();
		}
	},

_activate: function( event ) {
		if ( this.active && !this.active.is( ".ui-state-disabled" ) ) {
			if ( this.active.children( "[aria-haspopup='true']" ).length ) {
				this.expand( event );
			} else {
				this.select( event );
			}
		}
	},

refresh: function() {
		var menus, items, newSubmenus, newItems, newWrappers,
			that = this,
			icon = this.options.icons.submenu,
			submenus = this.element.find( this.options.menus );

this._toggleClass( "ui-menu-icons", null, !!this.element.find( ".ui-icon" ).length );

// Initialize nested menus
		newSubmenus = submenus.filter( ":not(.ui-menu)" )
			.hide()
			.attr( {
				role: this.options.role,
				"aria-hidden": "true",
				"aria-expanded": "false"
			} )
			.each( function() {
				var menu = $( this ),
					item = menu.prev(),
					submenuCaret = $( "<span>" ).data( "ui-menu-submenu-caret", true );

that._addClass( submenuCaret, "ui-menu-icon", "ui-icon " + icon );
				item
					.attr( "aria-haspopup", "true" )
					.prepend( submenuCaret );
				menu.attr( "aria-labelledby", item.attr( "id" ) );
			} );

this._addClass( newSubmenus, "ui-menu", "ui-widget ui-widget-content ui-front" );

menus = submenus.add( this.element );
		items = menus.find( this.options.items );

// Initialize menu-items containing spaces and/or dashes only as dividers
		items.not( ".ui-menu-item" ).each( function() {
			var item = $( this );
			if ( that._isDivider( item ) ) {
				that._addClass( item, "ui-menu-divider", "ui-widget-content" );
			}
		} );

// Don't refresh list items that are already adapted
		newItems = items.not( ".ui-menu-item, .ui-menu-divider" );
		newWrappers = newItems.children()
			.not( ".ui-menu" )
				.uniqueId()
				.attr( {
					tabIndex: -1,
					role: this._itemRole()
				} );
		this._addClass( newItems, "ui-menu-item" )
			._addClass( newWrappers, "ui-menu-item-wrapper" );

// Add aria-disabled attribute to any disabled menu item
		items.filter( ".ui-state-disabled" ).attr( "aria-disabled", "true" );

// If the active item has been removed, blur the menu
		if ( this.active && !$.contains( this.element[ 0 ], this.active[ 0 ] ) ) {
			this.blur();
		}
	},

_itemRole: function() {
		return {
			menu: "menuitem",
			listbox: "option"
		}[ this.options.role ];
	},

_setOption: function( key, value ) {
		if ( key === "icons" ) {
			var icons = this.element.find( ".ui-menu-icon" );
			this._removeClass( icons, null, this.options.icons.submenu )
				._addClass( icons, null, value.submenu );
		}
		this._super( key, value );
	},

_setOptionDisabled: function( value ) {
		this._super( value );

this.element.attr( "aria-disabled", String( value ) );
		this._toggleClass( null, "ui-state-disabled", !!value );
	},

focus: function( event, item ) {
		var nested, focused, activeParent;
		this.blur( event, event && event.type === "focus" );

this._scrollIntoView( item );

this.active = item.first();

focused = this.active.children( ".ui-menu-item-wrapper" );
		this._addClass( focused, null, "ui-state-active" );

// Only update aria-activedescendant if there's a role
		// otherwise we assume focus is managed elsewhere
		if ( this.options.role ) {
			this.element.attr( "aria-activedescendant", focused.attr( "id" ) );
		}

// Highlight active parent menu item, if any
		activeParent = this.active
			.parent()
				.closest( ".ui-menu-item" )
					.children( ".ui-menu-item-wrapper" );
		this._addClass( activeParent, null, "ui-state-active" );

if ( event && event.type === "keydown" ) {
			this._close();
		} else {
			this.timer = this._delay( function() {
				this._close();
			}, this.delay );
		}

nested = item.children( ".ui-menu" );
		if ( nested.length && event && ( /^mouse/.test( event.type ) ) ) {
			this._startOpening( nested );
		}
		this.activeMenu = item.parent();

this._trigger( "focus", event, { item: item } );
	},

_scrollIntoView: function( item ) {
		var borderTop, paddingTop, offset, scroll, elementHeight, itemHeight;
		if ( this._hasScroll() ) {
			borderTop = parseFloat( $.css( this.activeMenu[ 0 ], "borderTopWidth" ) ) || 0;
			paddingTop = parseFloat( $.css( this.activeMenu[ 0 ], "paddingTop" ) ) || 0;
			offset = item.offset().top - this.activeMenu.offset().top - borderTop - paddingTop;
			scroll = this.activeMenu.scrollTop();
			elementHeight = this.activeMenu.height();
			itemHeight = item.outerHeight();

if ( offset < 0 ) {
				this.activeMenu.scrollTop( scroll + offset );
			} else if ( offset + itemHeight > elementHeight ) {
				this.activeMenu.scrollTop( scroll + offset - elementHeight + itemHeight );
			}
		}
	},

blur: function( event, fromFocus ) {
		if ( !fromFocus ) {
			clearTimeout( this.timer );
		}

if ( !this.active ) {
			return;
		}

this._removeClass( this.active.children( ".ui-menu-item-wrapper" ),
			null, "ui-state-active" );

this._trigger( "blur", event, { item: this.active } );
		this.active = null;
	},

_startOpening: function( submenu ) {
		clearTimeout( this.timer );

// Don't open if already open fixes a Firefox bug that caused a .5 pixel
		// shift in the submenu position when mousing over the caret icon
		if ( submenu.attr( "aria-hidden" ) !== "true" ) {
			return;
		}

this.timer = this._delay( function() {
			this._close();
			this._open( submenu );
		}, this.delay );
	},

_open: function( submenu ) {
		var position = $.extend( {
			of: this.active
		}, this.options.position );

clearTimeout( this.timer );
		this.element.find( ".ui-menu" ).not( submenu.parents( ".ui-menu" ) )
			.hide()
			.attr( "aria-hidden", "true" );

submenu
			.show()
			.removeAttr( "aria-hidden" )
			.attr( "aria-expanded", "true" )
			.position( position );
	},

collapseAll: function( event, all ) {
		clearTimeout( this.timer );
		this.timer = this._delay( function() {

// If we were passed an event, look for the submenu that contains the event
			var currentMenu = all ? this.element :
				$( event && event.target ).closest( this.element.find( ".ui-menu" ) );

// If we found no valid submenu ancestor, use the main menu to close all
			// sub menus anyway
			if ( !currentMenu.length ) {
				currentMenu = this.element;
			}

this._close( currentMenu );

this.blur( event );

// Work around active item staying active after menu is blurred
			this._removeClass( currentMenu.find( ".ui-state-active" ), null, "ui-state-active" );

this.activeMenu = currentMenu;
		}, all ? 0 : this.delay );
	},

// With no arguments, closes the currently active menu - if nothing is active
	// it closes all menus.  If passed an argument, it will search for menus BELOW
	_close: function( startMenu ) {
		if ( !startMenu ) {
			startMenu = this.active ? this.active.parent() : this.element;
		}

startMenu.find( ".ui-menu" )
			.hide()
			.attr( "aria-hidden", "true" )
			.attr( "aria-expanded", "false" );
	},

_closeOnDocumentClick: function( event ) {
		return !$( event.target ).closest( ".ui-menu" ).length;
	},

_isDivider: function( item ) {

// Match hyphen, em dash, en dash
		return !/[^\-\u2014\u2013\s]/.test( item.text() );
	},

collapse: function( event ) {
		var newItem = this.active &&
			this.active.parent().closest( ".ui-menu-item", this.element );
		if ( newItem && newItem.length ) {
			this._close();
			this.focus( event, newItem );
		}
	},

expand: function( event ) {
		var newItem = this.active && this._menuItems( this.active.children( ".ui-menu" ) ).first();

if ( newItem && newItem.length ) {
			this._open( newItem.parent() );

// Delay so Firefox will not hide activedescendant change in expanding submenu from AT
			this._delay( function() {
				this.focus( event, newItem );
			} );
		}
	},

next: function( event ) {
		this._move( "next", "first", event );
	},

previous: function( event ) {
		this._move( "prev", "last", event );
	},

isFirstItem: function() {
		return this.active && !this.active.prevAll( ".ui-menu-item" ).length;
	},

isLastItem: function() {
		return this.active && !this.active.nextAll( ".ui-menu-item" ).length;
	},

_menuItems: function( menu ) {
		return ( menu || this.element )
			.find( this.options.items )
			.filter( ".ui-menu-item" );
	},

_move: function( direction, filter, event ) {
		var next;
		if ( this.active ) {
			if ( direction === "first" || direction === "last" ) {
				next = this.active
					[ direction === "first" ? "prevAll" : "nextAll" ]( ".ui-menu-item" )
					.last();
			} else {
				next = this.active
					[ direction + "All" ]( ".ui-menu-item" )
					.first();
			}
		}
		if ( !next || !next.length || !this.active ) {
			next = this._menuItems( this.activeMenu )[ filter ]();
		}

this.focus( event, next );
	},

nextPage: function( event ) {
		var item, base, height;

if ( !this.active ) {
			this.next( event );
			return;
		}
		if ( this.isLastItem() ) {
			return;
		}
		if ( this._hasScroll() ) {
			base = this.active.offset().top;
			height = this.element.innerHeight();

// jQuery 3.2 doesn't include scrollbars in innerHeight, add it back.
			if ( $.fn.jquery.indexOf( "3.2." ) === 0 ) {
				height += this.element[ 0 ].offsetHeight - this.element.outerHeight();
			}

this.active.nextAll( ".ui-menu-item" ).each( function() {
				item = $( this );
				return item.offset().top - base - height < 0;
			} );

this.focus( event, item );
		} else {
			this.focus( event, this._menuItems( this.activeMenu )
				[ !this.active ? "first" : "last" ]() );
		}
	},

previousPage: function( event ) {
		var item, base, height;
		if ( !this.active ) {
			this.next( event );
			return;
		}
		if ( this.isFirstItem() ) {
			return;
		}
		if ( this._hasScroll() ) {
			base = this.active.offset().top;
			height = this.element.innerHeight();

// jQuery 3.2 doesn't include scrollbars in innerHeight, add it back.
			if ( $.fn.jquery.indexOf( "3.2." ) === 0 ) {
				height += this.element[ 0 ].offsetHeight - this.element.outerHeight();
			}

this.active.prevAll( ".ui-menu-item" ).each( function() {
				item = $( this );
				return item.offset().top - base + height > 0;
			} );

this.focus( event, item );
		} else {
			this.focus( event, this._menuItems( this.activeMenu ).first() );
		}
	},

_hasScroll: function() {
		return this.element.outerHeight() < this.element.prop( "scrollHeight" );
	},

select: function( event ) {

// TODO: It should never be possible to not have an active item at this
		// point, but the tests don't trigger mouseenter before click.
		this.active = this.active || $( event.target ).closest( ".ui-menu-item" );
		var ui = { item: this.active };
		if ( !this.active.has( ".ui-menu" ).length ) {
			this.collapseAll( event, true );
		}
		this._trigger( "select", event, ui );
	},

_filterMenuItems: function( character ) {
		var escapedCharacter = character.replace( /[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&" ),
			regex = new RegExp( "^" + escapedCharacter, "i" );

return this.activeMenu
			.find( this.options.items )

// Only match on items, not dividers or other content (#10571)
				.filter( ".ui-menu-item" )
					.filter( function() {
						return regex.test(
							String.prototype.trim.call(
								$( this ).children( ".ui-menu-item-wrapper" ).text() ) );
					} );
	}
} );

} );

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