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✏️ Editing: autocomplete-list-debug.js

YUI.add('autocomplete-list', function (Y, NAME) {

/**
Traditional autocomplete dropdown list widget, just like Mom used to make.

@module autocomplete
@submodule autocomplete-list
**/

/**
Traditional autocomplete dropdown list widget, just like Mom used to make.

@class AutoCompleteList
@extends Widget
@uses AutoCompleteBase
@uses WidgetPosition
@uses WidgetPositionAlign
@constructor
@param {Object} config Configuration object.
**/

var Lang   = Y.Lang,
    Node   = Y.Node,
    YArray = Y.Array,

// Whether or not we need an iframe shim.
    useShim = Y.UA.ie && Y.UA.ie < 7,

// keyCode constants.
    KEY_TAB = 9,

// String shorthand.
    _CLASS_ITEM        = '_CLASS_ITEM',
    _CLASS_ITEM_ACTIVE = '_CLASS_ITEM_ACTIVE',
    _CLASS_ITEM_HOVER  = '_CLASS_ITEM_HOVER',
    _SELECTOR_ITEM     = '_SELECTOR_ITEM',

ACTIVE_ITEM      = 'activeItem',
    ALWAYS_SHOW_LIST = 'alwaysShowList',
    CIRCULAR         = 'circular',
    HOVERED_ITEM     = 'hoveredItem',
    ID               = 'id',
    ITEM             = 'item',
    LIST             = 'list',
    RESULT           = 'result',
    RESULTS          = 'results',
    VISIBLE          = 'visible',
    WIDTH            = 'width',

// Event names.
    EVT_SELECT = 'select',

List = Y.Base.create('autocompleteList', Y.Widget, [
    Y.AutoCompleteBase,
    Y.WidgetPosition,
    Y.WidgetPositionAlign
], {
    // -- Prototype Properties -------------------------------------------------
    ARIA_TEMPLATE: '<div/>',
    ITEM_TEMPLATE: '<li/>',
    LIST_TEMPLATE: '<ul/>',

// Widget automatically attaches delegated event handlers to everything in
    // Y.Node.DOM_EVENTS, including synthetic events. Since Widget's event
    // delegation won't work for the synthetic valuechange event, and since
    // it creates a name collision between the backcompat "valueChange" synth
    // event alias and AutoCompleteList's "valueChange" event for the "value"
    // attr, this hack is necessary in order to prevent Widget from attaching
    // valuechange handlers.
    UI_EVENTS: (function () {
        var uiEvents = Y.merge(Y.Node.DOM_EVENTS);

delete uiEvents.valuechange;
        delete uiEvents.valueChange;

return uiEvents;
    }()),

// -- Lifecycle Prototype Methods ------------------------------------------
    initializer: function () {
        var inputNode = this.get('inputNode');

if (!inputNode) {
            Y.error('No inputNode specified.');
            return;
        }

this._inputNode  = inputNode;
        this._listEvents = [];

// This ensures that the list is rendered inside the same parent as the
        // input node by default, which is necessary for proper ARIA support.
        this.DEF_PARENT_NODE = inputNode.get('parentNode');

// Cache commonly used classnames and selectors for performance.
        this[_CLASS_ITEM]        = this.getClassName(ITEM);
        this[_CLASS_ITEM_ACTIVE] = this.getClassName(ITEM, 'active');
        this[_CLASS_ITEM_HOVER]  = this.getClassName(ITEM, 'hover');
        this[_SELECTOR_ITEM]     = '.' + this[_CLASS_ITEM];

/**
        Fires when an autocomplete suggestion is selected from the list,
        typically via a keyboard action or mouse click.

@event select
        @param {Node} itemNode List item node that was selected.
        @param {Object} result AutoComplete result object.
        @preventable _defSelectFn
        **/
        this.publish(EVT_SELECT, {
            defaultFn: this._defSelectFn
        });
    },

destructor: function () {
        while (this._listEvents.length) {
            this._listEvents.pop().detach();
        }

if (this._ariaNode) {
            this._ariaNode.remove().destroy(true);
        }
    },

bindUI: function () {
        this._bindInput();
        this._bindList();
    },

renderUI: function () {
        var ariaNode    = this._createAriaNode(),
            boundingBox = this.get('boundingBox'),
            contentBox  = this.get('contentBox'),
            inputNode   = this._inputNode,
            listNode    = this._createListNode(),
            parentNode  = inputNode.get('parentNode');

inputNode.addClass(this.getClassName('input')).setAttrs({
            'aria-autocomplete': LIST,
            'aria-expanded'    : false,
            'aria-owns'        : listNode.get('id')
        });

// ARIA node must be outside the widget or announcements won't be made
        // when the widget is hidden.
        parentNode.append(ariaNode);

// Add an iframe shim for IE6.
        if (useShim) {
            boundingBox.plug(Y.Plugin.Shim);
        }

this._ariaNode    = ariaNode;
        this._boundingBox = boundingBox;
        this._contentBox  = contentBox;
        this._listNode    = listNode;
        this._parentNode  = parentNode;
    },

syncUI: function () {
        // No need to call _syncPosition() here; the other _sync methods will
        // call it when necessary.
        this._syncResults();
        this._syncVisibility();
    },

// -- Public Prototype Methods ---------------------------------------------

/**
    Hides the list, unless the `alwaysShowList` attribute is `true`.

@method hide
    @see show
    @chainable
    **/
    hide: function () {
        return this.get(ALWAYS_SHOW_LIST) ? this : this.set(VISIBLE, false);
    },

/**
    Selects the specified _itemNode_, or the current `activeItem` if _itemNode_
    is not specified.

@method selectItem
    @param {Node} [itemNode] Item node to select.
    @param {EventFacade} [originEvent] Event that triggered the selection, if
        any.
    @chainable
    **/
    selectItem: function (itemNode, originEvent) {
        if (itemNode) {
            if (!itemNode.hasClass(this[_CLASS_ITEM])) {
                return this;
            }
        } else {
            itemNode = this.get(ACTIVE_ITEM);

if (!itemNode) {
                return this;
            }
        }

this.fire(EVT_SELECT, {
            itemNode   : itemNode,
            originEvent: originEvent || null,
            result     : itemNode.getData(RESULT)
        });

return this;
    },

// -- Protected Prototype Methods ------------------------------------------

/**
    Activates the next item after the currently active item. If there is no next
    item and the `circular` attribute is `true`, focus will wrap back to the
    input node.

@method _activateNextItem
    @chainable
    @protected
    **/
    _activateNextItem: function () {
        var item = this.get(ACTIVE_ITEM),
            nextItem;

if (item) {
            nextItem = item.next(this[_SELECTOR_ITEM]) ||
                    (this.get(CIRCULAR) ? null : item);
        } else {
            nextItem = this._getFirstItemNode();
        }

this.set(ACTIVE_ITEM, nextItem);

return this;
    },

/**
    Activates the item previous to the currently active item. If there is no
    previous item and the `circular` attribute is `true`, focus will wrap back
    to the input node.

@method _activatePrevItem
    @chainable
    @protected
    **/
    _activatePrevItem: function () {
        var item     = this.get(ACTIVE_ITEM),
            prevItem = item ? item.previous(this[_SELECTOR_ITEM]) :
                    this.get(CIRCULAR) && this._getLastItemNode();

this.set(ACTIVE_ITEM, prevItem || null);

return this;
    },

/**
    Appends the specified result _items_ to the list inside a new item node.

@method _add
    @param {Array|Node|HTMLElement|String} items Result item or array of
        result items.
    @return {NodeList} Added nodes.
    @protected
    **/
    _add: function (items) {
        var itemNodes = [];

YArray.each(Lang.isArray(items) ? items : [items], function (item) {
            itemNodes.push(this._createItemNode(item).setData(RESULT, item));
        }, this);

itemNodes = Y.all(itemNodes);
        this._listNode.append(itemNodes.toFrag());

return itemNodes;
    },

/**
    Updates the ARIA live region with the specified message.

@method _ariaSay
    @param {String} stringId String id (from the `strings` attribute) of the
        message to speak.
    @param {Object} [subs] Substitutions for placeholders in the string.
    @protected
    **/
    _ariaSay: function (stringId, subs) {
        var message = this.get('strings.' + stringId);
        this._ariaNode.set('text', subs ? Lang.sub(message, subs) : message);
    },

/**
    Binds `inputNode` events and behavior.

@method _bindInput
    @protected
    **/
    _bindInput: function () {
        var inputNode = this._inputNode,
            alignNode, alignWidth, tokenInput;

// Null align means we can auto-align. Set align to false to prevent
        // auto-alignment, or a valid alignment config to customize the
        // alignment.
        if (this.get('align') === null) {
            // If this is a tokenInput, align with its bounding box.
            // Otherwise, align with the inputNode. Bit of a cheat.
            tokenInput = this.get('tokenInput');
            alignNode  = (tokenInput && tokenInput.get('boundingBox')) || inputNode;

this.set('align', {
                node  : alignNode,
                points: ['tl', 'bl']
            });

// If no width config is set, attempt to set the list's width to the
            // width of the alignment node. If the alignment node's width is
            // falsy, do nothing.
            if (!this.get(WIDTH) && (alignWidth = alignNode.get('offsetWidth'))) {
                this.set(WIDTH, alignWidth);
            }
        }

// Attach inputNode events.
        this._listEvents = this._listEvents.concat([
            inputNode.after('blur',  this._afterListInputBlur, this),
            inputNode.after('focus', this._afterListInputFocus, this)
        ]);
    },

/**
    Binds list events.

@method _bindList
    @protected
    **/
    _bindList: function () {
        this._listEvents = this._listEvents.concat([
            Y.one('doc').after('click', this._afterDocClick, this),
            Y.one('win').after('windowresize', this._syncPosition, this),

this.after({
                mouseover: this._afterMouseOver,
                mouseout : this._afterMouseOut,

activeItemChange    : this._afterActiveItemChange,
                alwaysShowListChange: this._afterAlwaysShowListChange,
                hoveredItemChange   : this._afterHoveredItemChange,
                resultsChange       : this._afterResultsChange,
                visibleChange       : this._afterVisibleChange
            }),

this._listNode.delegate('click', this._onItemClick,
                    this[_SELECTOR_ITEM], this)
        ]);
    },

/**
    Clears the contents of the tray.

@method _clear
    @protected
    **/
    _clear: function () {
        this.set(ACTIVE_ITEM, null);
        this._set(HOVERED_ITEM, null);

this._listNode.get('children').remove(true);
    },

/**
    Creates and returns an ARIA live region node.

@method _createAriaNode
    @return {Node} ARIA node.
    @protected
    **/
    _createAriaNode: function () {
        var ariaNode = Node.create(this.ARIA_TEMPLATE);

return ariaNode.addClass(this.getClassName('aria')).setAttrs({
            'aria-live': 'polite',
            role       : 'status'
        });
    },

/**
    Creates and returns an item node with the specified _content_.

@method _createItemNode
    @param {Object} result Result object.
    @return {Node} Item node.
    @protected
    **/
    _createItemNode: function (result) {
        var itemNode = Node.create(this.ITEM_TEMPLATE);

return itemNode.addClass(this[_CLASS_ITEM]).setAttrs({
            id  : Y.stamp(itemNode),
            role: 'option'
        }).setAttribute('data-text', result.text).append(result.display);
    },

/**
    Creates and returns a list node. If the `listNode` attribute is already set
    to an existing node, that node will be used.

@method _createListNode
    @return {Node} List node.
    @protected
    **/
    _createListNode: function () {
        var listNode = this.get('listNode') || Node.create(this.LIST_TEMPLATE);

listNode.addClass(this.getClassName(LIST)).setAttrs({
            id  : Y.stamp(listNode),
            role: 'listbox'
        });

this._set('listNode', listNode);
        this.get('contentBox').append(listNode);

return listNode;
    },

/**
    Gets the first item node in the list, or `null` if the list is empty.

@method _getFirstItemNode
    @return {Node|null}
    @protected
    **/
    _getFirstItemNode: function () {
        return this._listNode.one(this[_SELECTOR_ITEM]);
    },

/**
    Gets the last item node in the list, or `null` if the list is empty.

@method _getLastItemNode
    @return {Node|null}
    @protected
    **/
    _getLastItemNode: function () {
        return this._listNode.one(this[_SELECTOR_ITEM] + ':last-child');
    },

/**
    Synchronizes the result list's position and alignment.

@method _syncPosition
    @protected
    **/
    _syncPosition: function () {
        // Force WidgetPositionAlign to refresh its alignment.
        this._syncUIPosAlign();

// Resize the IE6 iframe shim to match the list's dimensions.
        this._syncShim();
    },

/**
    Synchronizes the results displayed in the list with those in the _results_
    argument, or with the `results` attribute if an argument is not provided.

@method _syncResults
    @param {Array} [results] Results.
    @protected
    **/
    _syncResults: function (results) {
        if (!results) {
            results = this.get(RESULTS);
        }

this._clear();

if (results.length) {
            this._add(results);
            this._ariaSay('items_available');
        }

this._syncPosition();

if (this.get('activateFirstItem') && !this.get(ACTIVE_ITEM)) {
            this.set(ACTIVE_ITEM, this._getFirstItemNode());
        }
    },

/**
    Synchronizes the size of the iframe shim used for IE6 and lower. In other
    browsers, this method is a noop.

@method _syncShim
    @protected
    **/
    _syncShim: useShim ? function () {
        var shim = this._boundingBox.shim;

if (shim) {
            shim.sync();
        }
    } : function () {},

/**
    Synchronizes the visibility of the tray with the _visible_ argument, or with
    the `visible` attribute if an argument is not provided.

@method _syncVisibility
    @param {Boolean} [visible] Visibility.
    @protected
    **/
    _syncVisibility: function (visible) {
        if (this.get(ALWAYS_SHOW_LIST)) {
            visible = true;
            this.set(VISIBLE, visible);
        }

if (typeof visible === 'undefined') {
            visible = this.get(VISIBLE);
        }

this._inputNode.set('aria-expanded', visible);
        this._boundingBox.set('aria-hidden', !visible);

if (visible) {
            this._syncPosition();
        } else {
            this.set(ACTIVE_ITEM, null);
            this._set(HOVERED_ITEM, null);

// Force a reflow to work around a glitch in IE6 and 7 where some of
            // the contents of the list will sometimes remain visible after the
            // container is hidden.
            this._boundingBox.get('offsetWidth');
        }

// In some pages, IE7 fails to repaint the contents of the list after it
        // becomes visible. Toggling a bogus class on the body forces a repaint
        // that fixes the issue.
        if (Y.UA.ie === 7) {
            // Note: We don't actually need to use ClassNameManager here. This
            // class isn't applying any actual styles; it's just frobbing the
            // body element to force a repaint. The actual class name doesn't
            // really matter.
            Y.one('body')
                .addClass('yui3-ie7-sucks')
                .removeClass('yui3-ie7-sucks');
        }
    },

// -- Protected Event Handlers ---------------------------------------------

/**
    Handles `activeItemChange` events.

@method _afterActiveItemChange
    @param {EventFacade} e
    @protected
    **/
    _afterActiveItemChange: function (e) {
        var inputNode = this._inputNode,
            newVal    = e.newVal,
            prevVal   = e.prevVal,
            node;

// The previous item may have disappeared by the time this handler runs,
        // so we need to be careful.
        if (prevVal && prevVal._node) {
            prevVal.removeClass(this[_CLASS_ITEM_ACTIVE]);
        }

if (newVal) {
            newVal.addClass(this[_CLASS_ITEM_ACTIVE]);
            inputNode.set('aria-activedescendant', newVal.get(ID));
        } else {
            inputNode.removeAttribute('aria-activedescendant');
        }

if (this.get('scrollIntoView')) {
            node = newVal || inputNode;

if (!node.inRegion(Y.DOM.viewportRegion(), true)
                    || !node.inRegion(this._contentBox, true)) {

node.scrollIntoView();
            }
        }
    },

/**
    Handles `alwaysShowListChange` events.

@method _afterAlwaysShowListChange
    @param {EventFacade} e
    @protected
    **/
    _afterAlwaysShowListChange: function (e) {
        this.set(VISIBLE, e.newVal || this.get(RESULTS).length > 0);
    },

/**
    Handles click events on the document. If the click is outside both the
    input node and the bounding box, the list will be hidden.

@method _afterDocClick
    @param {EventFacade} e
    @protected
    @since 3.5.0
    **/
    _afterDocClick: function (e) {
        var boundingBox = this._boundingBox,
            target      = e.target;

if (target !== this._inputNode && target !== boundingBox &&
                !target.ancestor('#' + boundingBox.get('id'), true)){
            this.hide();
        }
    },

/**
    Handles `hoveredItemChange` events.

@method _afterHoveredItemChange
    @param {EventFacade} e
    @protected
    **/
    _afterHoveredItemChange: function (e) {
        var newVal  = e.newVal,
            prevVal = e.prevVal;

if (prevVal) {
            prevVal.removeClass(this[_CLASS_ITEM_HOVER]);
        }

if (newVal) {
            newVal.addClass(this[_CLASS_ITEM_HOVER]);
        }
    },

/**
    Handles `inputNode` blur events.

@method _afterListInputBlur
    @protected
    **/
    _afterListInputBlur: function () {
        this._listInputFocused = false;

if (this.get(VISIBLE) &&
                !this._mouseOverList &&
                (this._lastInputKey !== KEY_TAB ||
                    !this.get('tabSelect') ||
                    !this.get(ACTIVE_ITEM))) {
            this.hide();
        }
    },

/**
    Handles `inputNode` focus events.

@method _afterListInputFocus
    @protected
    **/
    _afterListInputFocus: function () {
        this._listInputFocused = true;
    },

/**
    Handles `mouseover` events.

@method _afterMouseOver
    @param {EventFacade} e
    @protected
    **/
    _afterMouseOver: function (e) {
        var itemNode = e.domEvent.target.ancestor(this[_SELECTOR_ITEM], true);

this._mouseOverList = true;

if (itemNode) {
            this._set(HOVERED_ITEM, itemNode);
        }
    },

/**
    Handles `mouseout` events.

@method _afterMouseOut
    @param {EventFacade} e
    @protected
    **/
    _afterMouseOut: function () {
        this._mouseOverList = false;
        this._set(HOVERED_ITEM, null);
    },

/**
    Handles `resultsChange` events.

@method _afterResultsChange
    @param {EventFacade} e
    @protected
    **/
    _afterResultsChange: function (e) {
        this._syncResults(e.newVal);

if (!this.get(ALWAYS_SHOW_LIST)) {
            this.set(VISIBLE, !!e.newVal.length);
        }
    },

/**
    Handles `visibleChange` events.

@method _afterVisibleChange
    @param {EventFacade} e
    @protected
    **/
    _afterVisibleChange: function (e) {
        this._syncVisibility(!!e.newVal);
    },

/**
    Delegated event handler for item `click` events.

@method _onItemClick
    @param {EventFacade} e
    @protected
    **/
    _onItemClick: function (e) {
        var itemNode = e.currentTarget;

this.set(ACTIVE_ITEM, itemNode);
        this.selectItem(itemNode, e);
    },

// -- Protected Default Event Handlers -------------------------------------

/**
    Default `select` event handler.

@method _defSelectFn
    @param {EventFacade} e
    @protected
    **/
    _defSelectFn: function (e) {
        var text = e.result.text;

// TODO: support typeahead completion, etc.
        this._inputNode.focus();
        this._updateValue(text);
        this._ariaSay('item_selected', {item: text});
        this.hide();
    }
}, {
    ATTRS: {
        /**
        If `true`, the first item in the list will be activated by default when
        the list is initially displayed and when results change.

@attribute activateFirstItem
        @type Boolean
        @default false
        **/
        activateFirstItem: {
            value: false
        },

/**
        Item that's currently active, if any. When the user presses enter, this
        is the item that will be selected.

@attribute activeItem
        @type Node
        **/
        activeItem: {
            setter: Y.one,
            value: null
        },

/**
        If `true`, the list will remain visible even when there are no results
        to display.

@attribute alwaysShowList
        @type Boolean
        @default false
        **/
        alwaysShowList: {
            value: false
        },

/**
        If `true`, keyboard navigation will wrap around to the opposite end of
        the list when navigating past the first or last item.

@attribute circular
        @type Boolean
        @default true
        **/
        circular: {
            value: true
        },

/**
        Item currently being hovered over by the mouse, if any.

@attribute hoveredItem
        @type Node|null
        @readOnly
        **/
        hoveredItem: {
            readOnly: true,
            value: null
        },

/**
        Node that will contain result items.

@attribute listNode
        @type Node|null
        @initOnly
        **/
        listNode: {
            writeOnce: 'initOnly',
            value: null
        },

/**
        If `true`, the viewport will be scrolled to ensure that the active list
        item is visible when necessary.

@attribute scrollIntoView
        @type Boolean
        @default false
        **/
        scrollIntoView: {
            value: false
        },

/**
        Translatable strings used by the AutoCompleteList widget.

@attribute strings
        @type Object
        **/
        strings: {
            valueFn: function () {
                return Y.Intl.get('autocomplete-list');
            }
        },

/**
        If `true`, pressing the tab key while the list is visible will select
        the active item, if any.

@attribute tabSelect
        @type Boolean
        @default true
        **/
        tabSelect: {
            value: true
        },

// The "visible" attribute is documented in Widget.
        visible: {
            value: false
        }
    },

CSS_PREFIX: Y.ClassNameManager.getClassName('aclist')
});

Y.AutoCompleteList = List;

/**
Alias for <a href="AutoCompleteList.html">`AutoCompleteList`</a>. See that class
for API docs.

@class AutoComplete
**/

Y.AutoComplete = List;

}, '3.18.1', {
    "lang": [
        "en",
        "es",
        "hu",
        "it"
    ],
    "requires": [
        "autocomplete-base",
        "event-resize",
        "node-screen",
        "selector-css3",
        "shim-plugin",
        "widget",
        "widget-position",
        "widget-position-align"
    ],
    "skinnable": true
});

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