/*!

 * http://jqueryui.com

 *

 * Copyright jQuery Foundation and other contributors

 * Released under the MIT license.

 * http://jquery.org/license

 */

//>>label: Selectmenu

//>>group: Widgets

//>>description: Duplicates and extends the functionality of a native HTML select element, allowing it to be customizable in behavior and appearance far beyond the limitations of a native select.

//>>docs: http://api.jqueryui.com/selectmenu/

//>>demos: http://jqueryui.com/selectmenu/

//>>css.structure: ../../themes/base/core.css

//>>css.structure: ../../themes/base/selectmenu.css, ../../themes/base/button.css

//>>css.theme: ../../themes/base/theme.css

( function( factory ) {

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

		// AMD. Register as an anonymous module.

		define( [

			"jquery",

			"./menu",

			"./core"

		], factory );

	} else {

		// Browser globals

		factory( jQuery );

	}

return $.widget( "ui.selectmenu", [ $.ui.formResetMixin, {

	defaultElement: "<select>",

	options: {

		appendTo: null,

		classes: {

			"ui-selectmenu-button-open": "ui-corner-top",

			"ui-selectmenu-button-closed": "ui-corner-all"

		},

		disabled: null,

		icons: {

			button: "ui-icon-triangle-1-s"

		},

		position: {

			my: "left top",

			at: "left bottom",

			collision: "none"

		},

		width: false,

		// Callbacks

		change: null,

		close: null,

		focus: null,

		open: null,

		select: null

	},

	_create: function() {

		var selectmenuId = this.element.uniqueId().attr( "id" );

		this.ids = {

			element: selectmenuId,

			button: selectmenuId + "-button",

			menu: selectmenuId + "-menu"

		};

		this._drawButton();

		this._drawMenu();

		this._bindFormResetHandler();

		this._rendered = false;

		this.menuItems = $();

	},

	_drawButton: function() {

		var icon,

			that = this,

			item = this._parseOption(

				this.element.find( "option:selected" ),

				this.element[ 0 ].selectedIndex

			);

		// Associate existing label with the new button

		this.labels = this.element.labels().attr( "for", this.ids.button );

		this._on( this.labels, {

			click: function( event ) {

				event.preventDefault();

			}

		} );

		// Hide original select element

		this.element.hide();

		// Create button

		this.button = $( "<span>", {

			tabindex: this.options.disabled ? -1 : 0,

			id: this.ids.button,

			role: "combobox",

			"aria-expanded": "false",

			"aria-autocomplete": "list",

			"aria-owns": this.ids.menu,

			"aria-haspopup": "true",

			title: this.element.attr( "title" )

		} )

			.insertAfter( this.element );

		this._addClass( this.button, "ui-selectmenu-button ui-selectmenu-button-closed",

			"ui-button ui-widget" );

		icon = $( "<span>" ).appendTo( this.button );

		this._addClass( icon, "ui-selectmenu-icon", "ui-icon " + this.options.icons.button );

		this.buttonItem = this._renderButtonItem( item )

			.appendTo( this.button );

		if ( this.options.width !== false ) {

			this._resizeButton();

		}

		this._on( this.button, this._buttonEvents );

		this.button.one( "focusin", function() {

			// Delay rendering the menu items until the button receives focus.

			// The menu may have already been rendered via a programmatic open.

			if ( !that._rendered ) {

				that._refreshMenu();

			}

		} );

	},

	_drawMenu: function() {

		var that = this;

		// Create menu

		this.menu = $( "<ul>", {

			"aria-hidden": "true",

			"aria-labelledby": this.ids.button,

			id: this.ids.menu

		} );

		// Wrap menu

		this.menuWrap = $( "<div>" ).append( this.menu );

		this._addClass( this.menuWrap, "ui-selectmenu-menu", "ui-front" );

		this.menuWrap.appendTo( this._appendTo() );

		// Initialize menu widget

		this.menuInstance = this.menu

			.menu( {

				classes: {

					"ui-menu": "ui-corner-bottom"

				},

				role: "listbox",

				select: function( event, ui ) {

					event.preventDefault();

					// Support: IE8

					// If the item was selected via a click, the text selection

					// will be destroyed in IE

					that._setSelection();

					that._select( ui.item.data( "ui-selectmenu-item" ), event );

				},

				focus: function( event, ui ) {

					var item = ui.item.data( "ui-selectmenu-item" );

					// Prevent inital focus from firing and check if its a newly focused item

					if ( that.focusIndex != null && item.index !== that.focusIndex ) {

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

						if ( !that.isOpen ) {

							that._select( item, event );

						}

					}

					that.focusIndex = item.index;

					that.button.attr( "aria-activedescendant",

						that.menuItems.eq( item.index ).attr( "id" ) );

				}

			} )

			.menu( "instance" );

		// Don't close the menu on mouseleave

		this.menuInstance._off( this.menu, "mouseleave" );

		// Cancel the menu's collapseAll on document click

		this.menuInstance._closeOnDocumentClick = function() {

			return false;

		};

		// Selects often contain empty items, but never contain dividers

		this.menuInstance._isDivider = function() {

			return false;

		};

	},

	refresh: function() {

		this._refreshMenu();

		this.buttonItem.replaceWith(

			this.buttonItem = this._renderButtonItem(

				// Fall back to an empty object in case there are no options

				this._getSelectedItem().data( "ui-selectmenu-item" ) || {}

			)

		);

		if ( this.options.width === null ) {

			this._resizeButton();

		}

	},

	_refreshMenu: function() {

		var item,

			options = this.element.find( "option" );

		this.menu.empty();

		this._parseOptions( options );

		this._renderMenu( this.menu, this.items );

		this.menuInstance.refresh();

		this.menuItems = this.menu.find( "li" )

			.not( ".ui-selectmenu-optgroup" )

		this._rendered = true;

		if ( !options.length ) {

			return;

		}

		item = this._getSelectedItem();

		// Update the menu to have the correct item focused

		this.menuInstance.focus( null, item );

		this._setAria( item.data( "ui-selectmenu-item" ) );

		// Set disabled state

		this._setOption( "disabled", this.element.prop( "disabled" ) );

	},

	open: function( event ) {

		if ( this.options.disabled ) {

			return;

		}

		// If this is the first time the menu is being opened, render the items

		if ( !this._rendered ) {

			this._refreshMenu();

		} else {

			// Menu clears focus on close, reset focus to selected item

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

			this.menuInstance.focus( null, this._getSelectedItem() );

		}

		// If there are no options, don't open the menu

		if ( !this.menuItems.length ) {

			return;

		}

		this.isOpen = true;

		this._toggleAttr();

		this._resizeMenu();

		this._position();

		this._on( this.document, this._documentClick );

		this._trigger( "open", event );

	},

	_position: function() {

		this.menuWrap.position( $.extend( { of: this.button }, this.options.position ) );

	},

	close: function( event ) {

		if ( !this.isOpen ) {

			return;

		}

		this.isOpen = false;

		this._toggleAttr();

		this.range = null;

		this._off( this.document );

		this._trigger( "close", event );

	},

	widget: function() {

		return this.button;

	},

	menuWidget: function() {

		return this.menu;

	},

	_renderButtonItem: function( item ) {

		var buttonItem = $( "<span>" );

		this._setText( buttonItem, item.label );

		this._addClass( buttonItem, "ui-selectmenu-text" );

		return buttonItem;

	},

	_renderMenu: function( ul, items ) {

		var that = this,

			currentOptgroup = "";

		$.each( items, function( index, item ) {

			var li;

			if ( item.optgroup !== currentOptgroup ) {

				li = $( "<li>", {

					text: item.optgroup

				} );

				that._addClass( li, "ui-selectmenu-optgroup", "ui-menu-divider" +

					( item.element.parent( "optgroup" ).prop( "disabled" ) ?

						" ui-state-disabled" :

						"" ) );

				li.appendTo( ul );

				currentOptgroup = item.optgroup;

			}

			that._renderItemData( ul, item );

		} );

	},

	_renderItemData: function( ul, item ) {

		return this._renderItem( ul, item ).data( "ui-selectmenu-item", item );

	},

	_renderItem: function( ul, item ) {

		var li = $( "<li>" ),

			wrapper = $( "<div>", {

				title: item.element.attr( "title" )

			} );

		if ( item.disabled ) {

			this._addClass( li, null, "ui-state-disabled" );

		}

		this._setText( wrapper, item.label );

		return li.append( wrapper ).appendTo( ul );

	},

	_setText: function( element, value ) {

		if ( value ) {

			element.text( value );

		} else {

			element.html( " " );

		}

	},

	_move: function( direction, event ) {

		var item, next,

			filter = ".ui-menu-item";

		if ( this.isOpen ) {

			item = this.menuItems.eq( this.focusIndex ).parent( "li" );

		} else {

			item = this.menuItems.eq( this.element[ 0 ].selectedIndex ).parent( "li" );