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submenu

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.show()

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.removeAttr( "aria-hidden" )

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.attr( "aria-expanded", "true" )

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.position( position );

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collapseAll: function( event, all ) {

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clearTimeout( this.timer );

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this.timer = this._delay( function() {

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// If we were passed an event, look for the submenu that contains the event

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var currentMenu = all ? this.element :

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$( event && event.target ).closest( this.element.find( ".ui-menu" ) );

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// If we found no valid submenu ancestor, use the main menu to close all

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// sub menus anyway

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if ( !currentMenu.length ) {

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currentMenu = this.element;

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}

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this._close( currentMenu );

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this.blur( event );

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// Work around active item staying active after menu is blurred

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this._removeClass( currentMenu.find( ".ui-state-active" ), null, "ui-state-active" );

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this.activeMenu = currentMenu;

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}, all ? 0 : this.delay );

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// With no arguments, closes the currently active menu - if nothing is active

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// it closes all menus. If passed an argument, it will search for menus BELOW

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_close: function( startMenu ) {

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if ( !startMenu ) {

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startMenu = this.active ? this.active.parent() : this.element;

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}

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startMenu.find( ".ui-menu" )

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.hide()

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.attr( "aria-hidden", "true" )

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.attr( "aria-expanded", "false" );

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_closeOnDocumentClick: function( event ) {

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return !$( event.target ).closest( ".ui-menu" ).length;

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_isDivider: function( item ) {

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// Match hyphen, em dash, en dash

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return !/[^\-\u2014\u2013\s]/.test( item.text() );

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collapse: function( event ) {

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var newItem = this.active &&

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this.active.parent().closest( ".ui-menu-item", this.element );

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if ( newItem && newItem.length ) {

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this._close();

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this.focus( event, newItem );

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}

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expand: function( event ) {

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var newItem = this.active && this._menuItems( this.active.children( ".ui-menu" ) ).first();

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if ( newItem && newItem.length ) {

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this._open( newItem.parent() );

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// Delay so Firefox will not hide activedescendant change in expanding submenu from AT

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this._delay( function() {

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this.focus( event, newItem );

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} );

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}

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next: function( event ) {

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this._move( "next", "first", event );

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previous: function( event ) {

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this._move( "prev", "last", event );

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isFirstItem: function() {

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return this.active && !this.active.prevAll( ".ui-menu-item" ).length;

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isLastItem: function() {

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return this.active && !this.active.nextAll( ".ui-menu-item" ).length;

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_menuItems: function( menu ) {

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return ( menu || this.element )

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.find( this.options.items )

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.filter( ".ui-menu-item" );

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_move: function( direction, filter, event ) {

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var next;

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if ( this.active ) {

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if ( direction === "first" || direction === "last" ) {

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next = this.active

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[ direction === "first" ? "prevAll" : "nextAll" ]( ".ui-menu-item" )

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.last();

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} else {

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next = this.active

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[ direction + "All" ]( ".ui-menu-item" )

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.first();

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}

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}

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if ( !next || !next.length || !this.active ) {

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next = this._menuItems( this.activeMenu )[ filter ]();

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}

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this.focus( event, next );

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nextPage: function( event ) {

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var item, base, height;

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if ( !this.active ) {

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this.next( event );

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return;

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}

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if ( this.isLastItem() ) {

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return;

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}

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if ( this._hasScroll() ) {

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base = this.active.offset().top;

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height = this.element.innerHeight();

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// jQuery 3.2 doesn't include scrollbars in innerHeight, add it back.

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if ( $.fn.jquery.indexOf( "3.2." ) === 0 ) {

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height += this.element[ 0 ].offsetHeight - this.element.outerHeight();

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}

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this.active.nextAll( ".ui-menu-item" ).each( function() {

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item = $( this );

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return item.offset().top - base - height < 0;

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} );

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this.focus( event, item );

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} else {

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this.focus( event, this._menuItems( this.activeMenu )

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[ !this.active ? "first" : "last" ]() );

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}

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previousPage: function( event ) {

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var item, base, height;

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if ( !this.active ) {

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this.next( event );

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return;

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}

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if ( this.isFirstItem() ) {

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return;

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}

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if ( this._hasScroll() ) {

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base = this.active.offset().top;

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height = this.element.innerHeight();

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// jQuery 3.2 doesn't include scrollbars in innerHeight, add it back.

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if ( $.fn.jquery.indexOf( "3.2." ) === 0 ) {

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height += this.element[ 0 ].offsetHeight - this.element.outerHeight();

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}

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this.active.prevAll( ".ui-menu-item" ).each( function() {

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item = $( this );

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return item.offset().top - base + height > 0;

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} );

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this.focus( event, item );

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} else {

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this.focus( event, this._menuItems( this.activeMenu ).first() );

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}

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_hasScroll: function() {

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return this.element.outerHeight() < this.element.prop( "scrollHeight" );

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select: function( event ) {

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// TODO: It should never be possible to not have an active item at this

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// point, but the tests don't trigger mouseenter before click.

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this.active = this.active || $( event.target ).closest( ".ui-menu-item" );

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var ui = { item: this.active };

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if ( !this.active.has( ".ui-menu" ).length ) {

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this.collapseAll( event, true );

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}

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this._trigger( "select", event, ui );

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_filterMenuItems: function( character ) {

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var escapedCharacter = character.replace( /[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&" ),

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regex = new RegExp( "^" + escapedCharacter, "i" );

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return this.activeMenu

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.find( this.options.items )

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// Only match on items, not dividers or other content (#10571)

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.filter( ".ui-menu-item" )

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.filter( function() {

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return regex.test(

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String.prototype.trim.call(

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$( this ).children( ".ui-menu-item-wrapper" ).text() ) );

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} );

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}

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} );

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} );

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