+/*
+Copyright (c) 2009, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 2.7.0
+*/
+/**
+ * The Carousel module provides a widget for browsing among a set of like
+ * objects represented pictorially.
+ *
+ * @module carousel
+ * @requires yahoo, dom, event, element
+ * @optional animation
+ * @namespace YAHOO.widget
+ * @title Carousel Widget
+ * @beta
+ */
+(function () {
+
+ var WidgetName; // forward declaration
+
+ /**
+ * The Carousel widget.
+ *
+ * @class Carousel
+ * @extends YAHOO.util.Element
+ * @constructor
+ * @param el {HTMLElement | String} The HTML element that represents the
+ * the container that houses the Carousel.
+ * @param cfg {Object} (optional) The configuration values
+ */
+ YAHOO.widget.Carousel = function (el, cfg) {
+
+ YAHOO.widget.Carousel.superclass.constructor.call(this, el, cfg);
+ };
+
+ /*
+ * Private variables of the Carousel component
+ */
+
+ /* Some abbreviations to avoid lengthy typing and lookups. */
+ var Carousel = YAHOO.widget.Carousel,
+ Dom = YAHOO.util.Dom,
+ Event = YAHOO.util.Event,
+ JS = YAHOO.lang;
+
+ /**
+ * The widget name.
+ * @private
+ * @static
+ */
+ WidgetName = "Carousel";
+
+ /**
+ * The internal table of Carousel instances.
+ * @private
+ * @static
+ */
+ var instances = {},
+
+ /*
+ * Custom events of the Carousel component
+ */
+
+ /**
+ * @event afterScroll
+ * @description Fires when the Carousel has scrolled to the previous or
+ * next page. Passes back the index of the first and last visible items in
+ * the Carousel. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ afterScrollEvent = "afterScroll",
+
+ /**
+ * @event allItemsRemovedEvent
+ * @description Fires when all items have been removed from the Carousel.
+ * See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ allItemsRemovedEvent = "allItemsRemoved",
+
+ /**
+ * @event beforeHide
+ * @description Fires before the Carousel is hidden. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ beforeHideEvent = "beforeHide",
+
+ /**
+ * @event beforePageChange
+ * @description Fires when the Carousel is about to scroll to the previous
+ * or next page. Passes back the page number of the current page. Note
+ * that the first page number is zero. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ beforePageChangeEvent = "beforePageChange",
+
+ /**
+ * @event beforeScroll
+ * @description Fires when the Carousel is about to scroll to the previous
+ * or next page. Passes back the index of the first and last visible items
+ * in the Carousel and the direction (backward/forward) of the scroll. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ beforeScrollEvent = "beforeScroll",
+
+ /**
+ * @event beforeShow
+ * @description Fires when the Carousel is about to be shown. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ beforeShowEvent = "beforeShow",
+
+ /**
+ * @event blur
+ * @description Fires when the Carousel loses focus. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ blurEvent = "blur",
+
+ /**
+ * @event focus
+ * @description Fires when the Carousel gains focus. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ focusEvent = "focus",
+
+ /**
+ * @event hide
+ * @description Fires when the Carousel is hidden. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ hideEvent = "hide",
+
+ /**
+ * @event itemAdded
+ * @description Fires when an item has been added to the Carousel. Passes
+ * back the content of the item that would be added, the index at which the
+ * item would be added, and the event itself. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ itemAddedEvent = "itemAdded",
+
+ /**
+ * @event itemRemoved
+ * @description Fires when an item has been removed from the Carousel.
+ * Passes back the content of the item that would be removed, the index
+ * from which the item would be removed, and the event itself. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ itemRemovedEvent = "itemRemoved",
+
+ /**
+ * @event itemSelected
+ * @description Fires when an item has been selected in the Carousel.
+ * Passes back the index of the selected item in the Carousel. Note, that
+ * the index begins from zero. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ itemSelectedEvent = "itemSelected",
+
+ /**
+ * @event loadItems
+ * @description Fires when the Carousel needs more items to be loaded for
+ * displaying them. Passes back the first and last visible items in the
+ * Carousel, and the number of items needed to be loaded. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ loadItemsEvent = "loadItems",
+
+ /**
+ * @event navigationStateChange
+ * @description Fires when the state of either one of the navigation
+ * buttons are changed from enabled to disabled or vice versa. Passes back
+ * the state (true/false) of the previous and next buttons. The value true
+ * signifies the button is enabled, false signifies disabled. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ navigationStateChangeEvent = "navigationStateChange",
+
+ /**
+ * @event pageChange
+ * @description Fires after the Carousel has scrolled to the previous or
+ * next page. Passes back the page number of the current page. Note
+ * that the first page number is zero. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ pageChangeEvent = "pageChange",
+
+ /*
+ * Internal event.
+ * @event render
+ * @description Fires when the Carousel is rendered. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ renderEvent = "render",
+
+ /**
+ * @event show
+ * @description Fires when the Carousel is shown. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ showEvent = "show",
+
+ /**
+ * @event startAutoPlay
+ * @description Fires when the auto play has started in the Carousel. See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ startAutoPlayEvent = "startAutoPlay",
+
+ /**
+ * @event stopAutoPlay
+ * @description Fires when the auto play has been stopped in the Carousel.
+ * See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ stopAutoPlayEvent = "stopAutoPlay",
+
+ /*
+ * Internal event.
+ * @event uiUpdateEvent
+ * @description Fires when the UI has been updated.
+ * See
+ * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a>
+ * for more information on listening for this event.
+ * @type YAHOO.util.CustomEvent
+ */
+ uiUpdateEvent = "uiUpdate";
+
+ /*
+ * Private helper functions used by the Carousel component
+ */
+
+ /**
+ * Create an element, set its class name and optionally install the element
+ * to its parent.
+ * @method createElement
+ * @param el {String} The element to be created
+ * @param attrs {Object} Configuration of parent, class and id attributes.
+ * If the content is specified, it is inserted after creation of the
+ * element. The content can also be an HTML element in which case it would
+ * be appended as a child node of the created element.
+ * @private
+ */
+ function createElement(el, attrs) {
+ var newEl = document.createElement(el);
+
+ attrs = attrs || {};
+ if (attrs.className) {
+ Dom.addClass(newEl, attrs.className);
+ }
+
+ if (attrs.parent) {
+ attrs.parent.appendChild(newEl);
+ }
+
+ if (attrs.id) {
+ newEl.setAttribute("id", attrs.id);
+ }
+
+ if (attrs.content) {
+ if (attrs.content.nodeName) {
+ newEl.appendChild(attrs.content);
+ } else {
+ newEl.innerHTML = attrs.content;
+ }
+ }
+
+ return newEl;
+ }
+
+ /**
+ * Get the computed style of an element.
+ *
+ * @method getStyle
+ * @param el {HTMLElement} The element for which the style needs to be
+ * returned.
+ * @param style {String} The style attribute
+ * @param type {String} "int", "float", etc. (defaults to int)
+ * @private
+ */
+ function getStyle(el, style, type) {
+ var value;
+
+ if (!el) {
+ return 0;
+ }
+
+ function getStyleIntVal(el, style) {
+ var val;
+
+ /*
+ * XXX: Safari calculates incorrect marginRight for an element
+ * which has its parent element style set to overflow: hidden
+ * https://bugs.webkit.org/show_bug.cgi?id=13343
+ * Let us assume marginLeft == marginRight
+ */
+ if (style == "marginRight" && YAHOO.env.ua.webkit) {
+ val = parseInt(Dom.getStyle(el, "marginLeft"), 10);
+ } else {
+ val = parseInt(Dom.getStyle(el, style), 10);
+ }
+
+ return JS.isNumber(val) ? val : 0;
+ }
+
+ function getStyleFloatVal(el, style) {
+ var val;
+
+ /*
+ * XXX: Safari calculates incorrect marginRight for an element
+ * which has its parent element style set to overflow: hidden
+ * https://bugs.webkit.org/show_bug.cgi?id=13343
+ * Let us assume marginLeft == marginRight
+ */
+ if (style == "marginRight" && YAHOO.env.ua.webkit) {
+ val = parseFloat(Dom.getStyle(el, "marginLeft"));
+ } else {
+ val = parseFloat(Dom.getStyle(el, style));
+ }
+
+ return JS.isNumber(val) ? val : 0;
+ }
+
+ if (typeof type == "undefined") {
+ type = "int";
+ }
+
+ switch (style) {
+ case "height":
+ value = el.offsetHeight;
+ if (value > 0) {
+ value += getStyleIntVal(el, "marginTop") +
+ getStyleIntVal(el, "marginBottom");
+ } else {
+ value = getStyleFloatVal(el, "height") +
+ getStyleIntVal(el, "marginTop") +
+ getStyleIntVal(el, "marginBottom") +
+ getStyleIntVal(el, "borderTopWidth") +
+ getStyleIntVal(el, "borderBottomWidth") +
+ getStyleIntVal(el, "paddingTop") +
+ getStyleIntVal(el, "paddingBottom");
+ }
+ break;
+ case "width":
+ value = el.offsetWidth;
+ if (value > 0) {
+ value += getStyleIntVal(el, "marginLeft") +
+ getStyleIntVal(el, "marginRight");
+ } else {
+ value = getStyleFloatVal(el, "width") +
+ getStyleIntVal(el, "marginLeft") +
+ getStyleIntVal(el, "marginRight") +
+ getStyleIntVal(el, "borderLeftWidth") +
+ getStyleIntVal(el, "borderRightWidth") +
+ getStyleIntVal(el, "paddingLeft") +
+ getStyleIntVal(el, "paddingRight");
+ }
+ break;
+ default:
+ if (type == "int") {
+ value = getStyleIntVal(el, style);
+ } else if (type == "float") {
+ value = getStyleFloatVal(el, style);
+ } else {
+ value = Dom.getStyle(el, style);
+ }
+ break;
+ }
+
+ return value;
+ }
+
+ /**
+ * Compute and return the height or width of a single Carousel item
+ * depending upon the orientation.
+ *
+ * @method getCarouselItemSize
+ * @param which {String} "height" or "width" to be returned. If this is
+ * passed explicitly, the calculated size is not cached.
+ * @private
+ */
+ function getCarouselItemSize(which) {
+ var carousel = this,
+ child,
+ size = 0,
+ vertical = false;
+
+ if (carousel._itemsTable.numItems === 0) {
+ return 0;
+ }
+
+ if (typeof which == "undefined") {
+ if (carousel._itemsTable.size > 0) {
+ return carousel._itemsTable.size;
+ }
+ }
+
+ if (JS.isUndefined(carousel._itemsTable.items[0])) {
+ return 0;
+ }
+
+ child = Dom.get(carousel._itemsTable.items[0].id);
+
+ if (typeof which == "undefined") {
+ vertical = carousel.get("isVertical");
+ } else {
+ vertical = which == "height";
+ }
+
+ if (vertical) {
+ size = getStyle(child, "height");
+ } else {
+ size = getStyle(child, "width");
+ }
+
+ if (typeof which == "undefined") {
+ carousel._itemsTable.size = size; // save the size for later
+ }
+
+ return size;
+ }
+
+ /**
+ * Return the index of the first item in the view port for displaying item
+ * in "pos".
+ *
+ * @method getFirstVisibleForPosition
+ * @param pos {Number} The position of the item to be displayed
+ * @private
+ */
+ function getFirstVisibleForPosition(pos) {
+ var num = this.get("numVisible");
+
+ return Math.floor(pos / num) * num;
+ }
+
+ /**
+ * Return the scrolling offset size given the number of elements to
+ * scroll.
+ *
+ * @method getScrollOffset
+ * @param delta {Number} The delta number of elements to scroll by.
+ * @private
+ */
+ function getScrollOffset(delta) {
+ var itemSize = 0,
+ size = 0;
+
+ itemSize = getCarouselItemSize.call(this);
+ size = itemSize * delta;
+
+ // XXX: really, when the orientation is vertical, the scrolling
+ // is not exactly the number of elements into element size.
+ if (this.get("isVertical")) {
+ size -= delta;
+ }
+
+ return size;
+ }
+
+ /**
+ * Scroll the Carousel by a page backward.
+ *
+ * @method scrollPageBackward
+ * @param {Event} ev The event object
+ * @param {Object} obj The context object
+ * @private
+ */
+ function scrollPageBackward(ev, obj) {
+ obj.scrollPageBackward();
+ Event.preventDefault(ev);
+ }
+
+ /**
+ * Scroll the Carousel by a page forward.
+ *
+ * @method scrollPageForward
+ * @param {Event} ev The event object
+ * @param {Object} obj The context object
+ * @private
+ */
+ function scrollPageForward(ev, obj) {
+ obj.scrollPageForward();
+ Event.preventDefault(ev);
+ }
+
+ /**
+ * Set the selected item.
+ *
+ * @method setItemSelection
+ * @param {Number} newpos The index of the new position
+ * @param {Number} oldpos The index of the previous position
+ * @private
+ */
+ function setItemSelection(newpos, oldpos) {
+ var carousel = this,
+ cssClass = carousel.CLASSES,
+ el,
+ firstItem = carousel._firstItem,
+ isCircular = carousel.get("isCircular"),
+ numItems = carousel.get("numItems"),
+ numVisible = carousel.get("numVisible"),
+ position = oldpos,
+ sentinel = firstItem + numVisible - 1;
+
+ if (position >= 0 && position < numItems) {
+ if (!JS.isUndefined(carousel._itemsTable.items[position])) {
+ el = Dom.get(carousel._itemsTable.items[position].id);
+ if (el) {
+ Dom.removeClass(el, cssClass.SELECTED_ITEM);
+ }
+ }
+ }
+
+ if (JS.isNumber(newpos)) {
+ newpos = parseInt(newpos, 10);
+ newpos = JS.isNumber(newpos) ? newpos : 0;
+ } else {
+ newpos = firstItem;
+ }
+
+ if (JS.isUndefined(carousel._itemsTable.items[newpos])) {
+ newpos = getFirstVisibleForPosition.call(carousel, newpos);
+ carousel.scrollTo(newpos); // still loading the item
+ }
+
+ if (!JS.isUndefined(carousel._itemsTable.items[newpos])) {
+ el = Dom.get(carousel._itemsTable.items[newpos].id);
+ if (el) {
+ Dom.addClass(el, cssClass.SELECTED_ITEM);
+ }
+ }
+
+ if (newpos < firstItem || newpos > sentinel) { // out of focus
+ newpos = getFirstVisibleForPosition.call(carousel, newpos);
+ carousel.scrollTo(newpos);
+ }
+ }
+
+ /**
+ * Fire custom events for enabling/disabling navigation elements.
+ *
+ * @method syncNavigation
+ * @private
+ */
+ function syncNavigation() {
+ var attach = false,
+ carousel = this,
+ cssClass = carousel.CLASSES,
+ i,
+ navigation,
+ sentinel;
+
+ // Don't do anything if the Carousel is not rendered
+ if (!carousel._hasRendered) {
+ return;
+ }
+
+ navigation = carousel.get("navigation");
+ sentinel = carousel._firstItem + carousel.get("numVisible");
+
+ if (navigation.prev) {
+ if (carousel.get("numItems") === 0 || carousel._firstItem === 0) {
+ if (carousel.get("numItems") === 0 ||
+ !carousel.get("isCircular")) {
+ Event.removeListener(navigation.prev, "click",
+ scrollPageBackward);
+ Dom.addClass(navigation.prev, cssClass.FIRST_NAV_DISABLED);
+ for (i = 0; i < carousel._navBtns.prev.length; i++) {
+ carousel._navBtns.prev[i].setAttribute("disabled",
+ "true");
+ }
+ carousel._prevEnabled = false;
+ } else {
+ attach = !carousel._prevEnabled;
+ }
+ } else {
+ attach = !carousel._prevEnabled;
+ }
+
+ if (attach) {
+ Event.on(navigation.prev, "click", scrollPageBackward,
+ carousel);
+ Dom.removeClass(navigation.prev, cssClass.FIRST_NAV_DISABLED);
+ for (i = 0; i < carousel._navBtns.prev.length; i++) {
+ carousel._navBtns.prev[i].removeAttribute("disabled");
+ }
+ carousel._prevEnabled = true;
+ }
+ }
+
+ attach = false;
+ if (navigation.next) {
+ if (sentinel >= carousel.get("numItems")) {
+ if (!carousel.get("isCircular")) {
+ Event.removeListener(navigation.next, "click",
+ scrollPageForward);
+ Dom.addClass(navigation.next, cssClass.DISABLED);
+ for (i = 0; i < carousel._navBtns.next.length; i++) {
+ carousel._navBtns.next[i].setAttribute("disabled",
+ "true");
+ }
+ carousel._nextEnabled = false;
+ } else {
+ attach = !carousel._nextEnabled;
+ }
+ } else {
+ attach = !carousel._nextEnabled;
+ }
+
+ if (attach) {
+ Event.on(navigation.next, "click", scrollPageForward,
+ carousel);
+ Dom.removeClass(navigation.next, cssClass.DISABLED);
+ for (i = 0; i < carousel._navBtns.next.length; i++) {
+ carousel._navBtns.next[i].removeAttribute("disabled");
+ }
+ carousel._nextEnabled = true;
+ }
+ }
+
+ carousel.fireEvent(navigationStateChangeEvent,
+ { next: carousel._nextEnabled, prev: carousel._prevEnabled });
+ }
+
+ /**
+ * Synchronize and redraw the Pager UI if necessary.
+ *
+ * @method syncPagerUi
+ * @private
+ */
+ function syncPagerUi(page) {
+ var carousel = this, numPages, numVisible;
+
+ // Don't do anything if the Carousel is not rendered
+ if (!carousel._hasRendered) {
+ return;
+ }
+
+ numVisible = carousel.get("numVisible");
+
+ if (!JS.isNumber(page)) {
+ page = Math.ceil(carousel.get("selectedItem") / numVisible);
+ }
+ numPages = Math.ceil(carousel.get("numItems") / numVisible);
+
+ carousel._pages.num = numPages;
+ carousel._pages.cur = page;
+
+ if (numPages > carousel.CONFIG.MAX_PAGER_BUTTONS) {
+ carousel._updatePagerMenu();
+ } else {
+ carousel._updatePagerButtons();
+ }
+ }
+
+ /**
+ * Handle UI update.
+ * Call the appropriate methods on events fired when an item is added, or
+ * removed for synchronizing the DOM.
+ *
+ * @method syncUi
+ * @param {Object} o The item that needs to be added or removed
+ * @private
+ */
+ function syncUi(o) {
+ var carousel = this;
+
+ if (!JS.isObject(o)) {
+ return;
+ }
+
+ switch (o.ev) {
+ case itemAddedEvent:
+ carousel._syncUiForItemAdd(o);
+ break;
+ case itemRemovedEvent:
+ carousel._syncUiForItemRemove(o);
+ break;
+ case loadItemsEvent:
+ carousel._syncUiForLazyLoading(o);
+ break;
+ }
+
+ carousel.fireEvent(uiUpdateEvent);
+ }
+
+ /**
+ * Update the state variables after scrolling the Carousel view port.
+ *
+ * @method updateStateAfterScroll
+ * @param {Integer} item The index to which the Carousel has scrolled to.
+ * @param {Integer} sentinel The last element in the view port.
+ * @private
+ */
+ function updateStateAfterScroll(item, sentinel) {
+ var carousel = this,
+ page = carousel.get("currentPage"),
+ newPage,
+ numPerPage = carousel.get("numVisible");
+
+ newPage = parseInt(carousel._firstItem / numPerPage, 10);
+ if (newPage != page) {
+ carousel.setAttributeConfig("currentPage", { value: newPage });
+ carousel.fireEvent(pageChangeEvent, newPage);
+ }
+
+ if (carousel.get("selectOnScroll")) {
+ if (carousel.get("selectedItem") != carousel._selectedItem) {
+ carousel.set("selectedItem", carousel._selectedItem);
+ }
+ }
+
+ clearTimeout(carousel._autoPlayTimer);
+ delete carousel._autoPlayTimer;
+ if (carousel.isAutoPlayOn()) {
+ carousel.startAutoPlay();
+ }
+
+ carousel.fireEvent(afterScrollEvent,
+ { first: carousel._firstItem,
+ last: sentinel },
+ carousel);
+ }
+
+ /*
+ * Static members and methods of the Carousel component
+ */
+
+ /**
+ * Return the appropriate Carousel object based on the id associated with
+ * the Carousel element or false if none match.
+ * @method getById
+ * @public
+ * @static
+ */
+ Carousel.getById = function (id) {
+ return instances[id] ? instances[id].object : false;
+ };
+
+ YAHOO.extend(Carousel, YAHOO.util.Element, {
+
+ /*
+ * Internal variables used within the Carousel component
+ */
+
+ /**
+ * The Animation object.
+ *
+ * @property _animObj
+ * @private
+ */
+ _animObj: null,
+
+ /**
+ * The Carousel element.
+ *
+ * @property _carouselEl
+ * @private
+ */
+ _carouselEl: null,
+
+ /**
+ * The Carousel clipping container element.
+ *
+ * @property _clipEl
+ * @private
+ */
+ _clipEl: null,
+
+ /**
+ * The current first index of the Carousel.
+ *
+ * @property _firstItem
+ * @private
+ */
+ _firstItem: 0,
+
+ /**
+ * Does the Carousel element have focus?
+ *
+ * @property _hasFocus
+ * @private
+ */
+ _hasFocus: false,
+
+ /**
+ * Is the Carousel rendered already?
+ *
+ * @property _hasRendered
+ * @private
+ */
+ _hasRendered: false,
+
+ /**
+ * Is the animation still in progress?
+ *
+ * @property _isAnimationInProgress
+ * @private
+ */
+ _isAnimationInProgress: false,
+
+ /**
+ * Is the auto-scrolling of Carousel in progress?
+ *
+ * @property _isAutoPlayInProgress
+ * @private
+ */
+ _isAutoPlayInProgress: false,
+
+ /**
+ * The table of items in the Carousel.
+ * The numItems is the number of items in the Carousel, items being the
+ * array of items in the Carousel. The size is the size of a single
+ * item in the Carousel. It is cached here for efficiency (to avoid
+ * computing the size multiple times).
+ *
+ * @property _itemsTable
+ * @private
+ */
+ _itemsTable: null,
+
+ /**
+ * The Carousel navigation buttons.
+ *
+ * @property _navBtns
+ * @private
+ */
+ _navBtns: null,
+
+ /**
+ * The Carousel navigation.
+ *
+ * @property _navEl
+ * @private
+ */
+ _navEl: null,
+
+ /**
+ * Status of the next navigation item.
+ *
+ * @property _nextEnabled
+ * @private
+ */
+ _nextEnabled: true,
+
+ /**
+ * The Carousel pages structure.
+ * This is an object of the total number of pages and the current page.
+ *
+ * @property _pages
+ * @private
+ */
+ _pages: null,
+
+ /**
+ * Status of the previous navigation item.
+ *
+ * @property _prevEnabled
+ * @private
+ */
+ _prevEnabled: true,
+
+ /**
+ * Whether the Carousel size needs to be recomputed or not?
+ *
+ * @property _recomputeSize
+ * @private
+ */
+ _recomputeSize: true,
+
+ /*
+ * CSS classes used by the Carousel component
+ */
+
+ CLASSES: {
+
+ /**
+ * The class name of the Carousel navigation buttons.
+ *
+ * @property BUTTON
+ * @default "yui-carousel-button"
+ */
+ BUTTON: "yui-carousel-button",
+
+ /**
+ * The class name of the Carousel element.
+ *
+ * @property CAROUSEL
+ * @default "yui-carousel"
+ */
+ CAROUSEL: "yui-carousel",
+
+ /**
+ * The class name of the container of the items in the Carousel.
+ *
+ * @property CAROUSEL_EL
+ * @default "yui-carousel-element"
+ */
+ CAROUSEL_EL: "yui-carousel-element",
+
+ /**
+ * The class name of the Carousel's container element.
+ *
+ * @property CONTAINER
+ * @default "yui-carousel-container"
+ */
+ CONTAINER: "yui-carousel-container",
+
+ /**
+ * The class name of the Carousel's container element.
+ *
+ * @property CONTENT
+ * @default "yui-carousel-content"
+ */
+ CONTENT: "yui-carousel-content",
+
+ /**
+ * The class name of a disabled navigation button.
+ *
+ * @property DISABLED
+ * @default "yui-carousel-button-disabled"
+ */
+ DISABLED: "yui-carousel-button-disabled",
+
+ /**
+ * The class name of the first Carousel navigation button.
+ *
+ * @property FIRST_NAV
+ * @default " yui-carousel-first-button"
+ */
+ FIRST_NAV: " yui-carousel-first-button",
+
+ /**
+ * The class name of a first disabled navigation button.
+ *
+ * @property FIRST_NAV_DISABLED
+ * @default "yui-carousel-first-button-disabled"
+ */
+ FIRST_NAV_DISABLED: "yui-carousel-first-button-disabled",
+
+ /**
+ * The class name of a first page element.
+ *
+ * @property FIRST_PAGE
+ * @default "yui-carousel-nav-first-page"
+ */
+ FIRST_PAGE: "yui-carousel-nav-first-page",
+
+ /**
+ * The class name of the Carousel navigation button that has focus.
+ *
+ * @property FOCUSSED_BUTTON
+ * @default "yui-carousel-button-focus"
+ */
+ FOCUSSED_BUTTON: "yui-carousel-button-focus",
+
+ /**
+ * The class name of a horizontally oriented Carousel.
+ *
+ * @property HORIZONTAL
+ * @default "yui-carousel-horizontal"
+ */
+ HORIZONTAL: "yui-carousel-horizontal",
+
+ /**
+ * The element to be used as the progress indicator when the item
+ * is still being loaded.
+ *
+ * @property ITEM_LOADING
+ * @default The progress indicator (spinner) image CSS class
+ */
+ ITEM_LOADING: "yui-carousel-item-loading",
+
+ /**
+ * The class name that will be set if the Carousel adjusts itself
+ * for a minimum width.
+ *
+ * @property MIN_WIDTH
+ * @default "yui-carousel-min-width"
+ */
+ MIN_WIDTH: "yui-carousel-min-width",
+
+ /**
+ * The navigation element container class name.
+ *
+ * @property NAVIGATION
+ * @default "yui-carousel-nav"
+ */
+ NAVIGATION: "yui-carousel-nav",
+
+ /**
+ * The class name of the next Carousel navigation button.
+ *
+ * @property NEXT_NAV
+ * @default " yui-carousel-next-button"
+ */
+ NEXT_NAV: " yui-carousel-next-button",
+
+ /**
+ * The class name of the next navigation link. This variable is
+ * not only used for styling, but also for identifying the link
+ * within the Carousel container.
+ *
+ * @property NEXT_PAGE
+ * @default "yui-carousel-next"
+ */
+ NEXT_PAGE: "yui-carousel-next",
+
+ /**
+ * The class name for the navigation container for prev/next.
+ *
+ * @property NAV_CONTAINER
+ * @default "yui-carousel-buttons"
+ */
+ NAV_CONTAINER: "yui-carousel-buttons",
+
+ /**
+ * The class name of the focussed page navigation. This class is
+ * specifically used for the ugly focus handling in Opera.
+ *
+ * @property PAGE_FOCUS
+ * @default "yui-carousel-nav-page-focus"
+ */
+ PAGE_FOCUS: "yui-carousel-nav-page-focus",
+
+ /**
+ * The class name of the previous navigation link. This variable
+ * is not only used for styling, but also for identifying the link
+ * within the Carousel container.
+ *
+ * @property PREV_PAGE
+ * @default "yui-carousel-prev"
+ */
+ PREV_PAGE: "yui-carousel-prev",
+
+ /**
+ * The class name of the selected item.
+ *
+ * @property SELECTED_ITEM
+ * @default "yui-carousel-item-selected"
+ */
+ SELECTED_ITEM: "yui-carousel-item-selected",
+
+ /**
+ * The class name of the selected paging navigation.
+ *
+ * @property SELECTED_NAV
+ * @default "yui-carousel-nav-page-selected"
+ */
+ SELECTED_NAV: "yui-carousel-nav-page-selected",
+
+ /**
+ * The class name of a vertically oriented Carousel.
+ *
+ * @property VERTICAL
+ * @default "yui-carousel-vertical"
+ */
+ VERTICAL: "yui-carousel-vertical",
+
+ /**
+ * The class name of the (vertical) Carousel's container element.
+ *
+ * @property VERTICAL_CONTAINER
+ * @default "yui-carousel-vertical-container"
+ */
+ VERTICAL_CONTAINER: "yui-carousel-vertical-container",
+
+ /**
+ * The class name of a visible Carousel.
+ *
+ * @property VISIBLE
+ * @default "yui-carousel-visible"
+ */
+ VISIBLE: "yui-carousel-visible"
+
+ },
+
+ /*
+ * Configuration attributes for configuring the Carousel component
+ */
+
+ CONFIG: {
+
+ /**
+ * The offset of the first visible item in the Carousel.
+ *
+ * @property FIRST_VISIBLE
+ * @default 0
+ */
+ FIRST_VISIBLE: 0,
+
+ /**
+ * The minimum width of the horizontal Carousel container to support
+ * the navigation buttons.
+ *
+ * @property HORZ_MIN_WIDTH
+ * @default 180
+ */
+ HORZ_MIN_WIDTH: 180,
+
+ /**
+ * The maximum number of pager buttons allowed beyond which the UI
+ * of the pager would be a drop-down of pages instead of buttons.
+ *
+ * @property MAX_PAGER_BUTTONS
+ * @default 5
+ */
+ MAX_PAGER_BUTTONS: 5,
+
+ /**
+ * The minimum width of the vertical Carousel container to support
+ * the navigation buttons.
+ *
+ * @property VERT_MIN_WIDTH
+ * @default 99
+ */
+ VERT_MIN_WIDTH: 99,
+
+ /**
+ * The number of visible items in the Carousel.
+ *
+ * @property NUM_VISIBLE
+ * @default 3
+ */
+ NUM_VISIBLE: 3
+
+ },
+
+ /*
+ * Internationalizable strings in the Carousel component
+ */
+
+ STRINGS: {
+
+ /**
+ * The content to be used as the progress indicator when the item
+ * is still being loaded.
+ *
+ * @property ITEM_LOADING_CONTENT
+ * @default "Loading"
+ */
+ ITEM_LOADING_CONTENT: "Loading",
+
+ /**
+ * The next navigation button name/text.
+ *
+ * @property NEXT_BUTTON_TEXT
+ * @default "Next Page"
+ */
+ NEXT_BUTTON_TEXT: "Next Page",
+
+ /**
+ * The prefix text for the pager in case the UI is a drop-down.
+ *
+ * @property PAGER_PREFIX_TEXT
+ * @default "Go to page "
+ */
+ PAGER_PREFIX_TEXT: "Go to page ",
+
+ /**
+ * The previous navigation button name/text.
+ *
+ * @property PREVIOUS_BUTTON_TEXT
+ * @default "Previous Page"
+ */
+ PREVIOUS_BUTTON_TEXT: "Previous Page"
+
+ },
+
+ /*
+ * Public methods of the Carousel component
+ */
+
+ /**
+ * Insert or append an item to the Carousel.
+ *
+ * @method addItem
+ * @public
+ * @param item {String | Object | HTMLElement} The item to be appended
+ * to the Carousel. If the parameter is a string, it is assumed to be
+ * the content of the newly created item. If the parameter is an
+ * object, it is assumed to supply the content and an optional class
+ * and an optional id of the newly created item.
+ * @param index {Number} optional The position to where in the list
+ * (starts from zero).
+ * @return {Boolean} Return true on success, false otherwise
+ */
+ addItem: function (item, index) {
+ var carousel = this,
+ className,
+ content,
+ elId,
+ numItems = carousel.get("numItems");
+
+ if (!item) {
+ return false;
+ }
+
+ if (JS.isString(item) || item.nodeName) {
+ content = item.nodeName ? item.innerHTML : item;
+ } else if (JS.isObject(item)) {
+ content = item.content;
+ } else {
+ return false;
+ }
+
+ className = item.className || "";
+ elId = item.id ? item.id : Dom.generateId();
+
+ if (JS.isUndefined(index)) {
+ carousel._itemsTable.items.push({
+ item : content,
+ className : className,
+ id : elId
+ });
+ } else {
+ if (index < 0 || index >= numItems) {
+ return false;
+ }
+ carousel._itemsTable.items.splice(index, 0, {
+ item : content,
+ className : className,
+ id : elId
+ });
+ }
+ carousel._itemsTable.numItems++;
+
+ if (numItems < carousel._itemsTable.items.length) {
+ carousel.set("numItems", carousel._itemsTable.items.length);
+ }
+
+ carousel.fireEvent(itemAddedEvent, { pos: index, ev: itemAddedEvent });
+
+ return true;
+ },
+
+ /**
+ * Insert or append multiple items to the Carousel.
+ *
+ * @method addItems
+ * @public
+ * @param items {Array} An array of items to be added with each item
+ * representing an item, index pair [{item, index}, ...]
+ * @return {Boolean} Return true on success, false otherwise
+ */
+ addItems: function (items) {
+ var i, n, rv = true;
+
+ if (!JS.isArray(items)) {
+ return false;
+ }
+
+ for (i = 0, n = items.length; i < n; i++) {
+ if (this.addItem(items[i][0], items[i][1]) === false) {
+ rv = false;
+ }
+ }
+
+ return rv;
+ },
+
+ /**
+ * Remove focus from the Carousel.
+ *
+ * @method blur
+ * @public
+ */
+ blur: function () {
+ this._carouselEl.blur();
+ this.fireEvent(blurEvent);
+ },
+
+ /**
+ * Clears the items from Carousel.
+ *
+ * @method clearItems
+ * public
+ */
+ clearItems: function () {
+ var carousel = this, n = carousel.get("numItems");
+
+ while (n > 0) {
+ if (!carousel.removeItem(0)) {
+ }
+ /*
+ For dynamic loading, the numItems may be much larger than
+ the actual number of items in the table. So, set the
+ numItems to zero, and break out of the loop if the table
+ is already empty.
+ */
+ if (carousel._itemsTable.numItems === 0) {
+ carousel.set("numItems", 0);
+ break;
+ }
+ n--;
+ }
+
+ carousel.fireEvent(allItemsRemovedEvent);
+ },
+
+ /**
+ * Set focus on the Carousel.
+ *
+ * @method focus
+ * @public
+ */
+ focus: function () {
+ var carousel = this,
+ first,
+ focusEl,
+ isSelectionInvisible,
+ itemsTable,
+ last,
+ numVisible,
+ selectOnScroll,
+ selected,
+ selItem;
+
+ // Don't do anything if the Carousel is not rendered
+ if (!carousel._hasRendered) {
+ return;
+ }
+
+ if (carousel.isAnimating()) {
+ // this messes up real bad!
+ return;
+ }
+
+ selItem = carousel.get("selectedItem");
+ numVisible = carousel.get("numVisible");
+ selectOnScroll = carousel.get("selectOnScroll");
+ selected = (selItem >= 0) ?
+ carousel.getItem(selItem) : null;
+ first = carousel.get("firstVisible");
+ last = first + numVisible - 1;
+ isSelectionInvisible = (selItem < first || selItem > last);
+ focusEl = (selected && selected.id) ?
+ Dom.get(selected.id) : null;
+ itemsTable = carousel._itemsTable;
+
+ if (!selectOnScroll && isSelectionInvisible) {
+ focusEl = (itemsTable && itemsTable.items &&
+ itemsTable.items[first]) ?
+ Dom.get(itemsTable.items[first].id) : null;
+ }
+
+ if (focusEl) {
+ try {
+ focusEl.focus();
+ } catch (ex) {
+ // ignore focus errors
+ }
+ }
+
+ carousel.fireEvent(focusEvent);
+ },
+
+ /**
+ * Hide the Carousel.
+ *
+ * @method hide
+ * @public
+ */
+ hide: function () {
+ var carousel = this;
+
+ if (carousel.fireEvent(beforeHideEvent) !== false) {
+ carousel.removeClass(carousel.CLASSES.VISIBLE);
+ carousel.fireEvent(hideEvent);
+ }
+ },
+
+ /**
+ * Initialize the Carousel.
+ *
+ * @method init
+ * @public
+ * @param el {HTMLElement | String} The html element that represents
+ * the Carousel container.
+ * @param attrs {Object} The set of configuration attributes for
+ * creating the Carousel.
+ */
+ init: function (el, attrs) {
+ var carousel = this,
+ elId = el, // save for a rainy day
+ parse = false;
+
+ if (!el) {
+ return;
+ }
+
+ carousel._hasRendered = false;
+ carousel._navBtns = { prev: [], next: [] };
+ carousel._pages = { el: null, num: 0, cur: 0 };
+ carousel._itemsTable = { loading: {}, numItems: 0,
+ items: [], size: 0 };
+
+
+ if (JS.isString(el)) {
+ el = Dom.get(el);
+ } else if (!el.nodeName) {
+ return;
+ }
+
+ Carousel.superclass.init.call(carousel, el, attrs);
+
+ if (el) {
+ if (!el.id) { // in case the HTML element is passed
+ el.setAttribute("id", Dom.generateId());
+ }
+ parse = carousel._parseCarousel(el);
+ if (!parse) {
+ carousel._createCarousel(elId);
+ }
+ } else {
+ el = carousel._createCarousel(elId);
+ }
+ elId = el.id;
+
+ carousel.initEvents();
+
+ if (parse) {
+ carousel._parseCarouselItems();
+ }
+
+ if (!attrs || typeof attrs.isVertical == "undefined") {
+ carousel.set("isVertical", false);
+ }
+
+ carousel._parseCarouselNavigation(el);
+ carousel._navEl = carousel._setupCarouselNavigation();
+
+ instances[elId] = { object: carousel };
+
+ carousel._loadItems();
+ },
+
+ /**
+ * Initialize the configuration attributes used to create the Carousel.
+ *
+ * @method initAttributes
+ * @public
+ * @param attrs {Object} The set of configuration attributes for
+ * creating the Carousel.
+ */
+ initAttributes: function (attrs) {
+ var carousel = this;
+
+ attrs = attrs || {};
+ Carousel.superclass.initAttributes.call(carousel, attrs);
+
+ /**
+ * @attribute carouselEl
+ * @description The type of the Carousel element.
+ * @default OL
+ * @type Boolean
+ */
+ carousel.setAttributeConfig("carouselEl", {
+ validator : JS.isString,
+ value : attrs.carouselEl || "OL"
+ });
+
+ /**
+ * @attribute carouselItemEl
+ * @description The type of the list of items within the Carousel.
+ * @default LI
+ * @type Boolean
+ */
+ carousel.setAttributeConfig("carouselItemEl", {
+ validator : JS.isString,
+ value : attrs.carouselItemEl || "LI"
+ });
+
+ /**
+ * @attribute currentPage
+ * @description The current page number (read-only.)
+ * @type Number
+ */
+ carousel.setAttributeConfig("currentPage", {
+ readOnly : true,
+ value : 0
+ });
+
+ /**
+ * @attribute firstVisible
+ * @description The index to start the Carousel from (indexes begin
+ * from zero)
+ * @default 0
+ * @type Number
+ */
+ carousel.setAttributeConfig("firstVisible", {
+ method : carousel._setFirstVisible,
+ validator : carousel._validateFirstVisible,
+ value :
+ attrs.firstVisible || carousel.CONFIG.FIRST_VISIBLE
+ });
+
+ /**
+ * @attribute selectOnScroll
+ * @description Set this to true to automatically set focus to
+ * follow scrolling in the Carousel.
+ * @default true
+ * @type Boolean
+ */
+ carousel.setAttributeConfig("selectOnScroll", {
+ validator : JS.isBoolean,
+ value : attrs.selectOnScroll || true
+ });
+
+ /**
+ * @attribute numVisible
+ * @description The number of visible items in the Carousel's
+ * viewport.
+ * @default 3
+ * @type Number
+ */
+ carousel.setAttributeConfig("numVisible", {
+ method : carousel._setNumVisible,
+ validator : carousel._validateNumVisible,
+ value : attrs.numVisible || carousel.CONFIG.NUM_VISIBLE
+ });
+
+ /**
+ * @attribute numItems
+ * @description The number of items in the Carousel.
+ * @type Number
+ */
+ carousel.setAttributeConfig("numItems", {
+ method : carousel._setNumItems,
+ validator : carousel._validateNumItems,
+ value : carousel._itemsTable.numItems
+ });
+
+ /**
+ * @attribute scrollIncrement
+ * @description The number of items to scroll by for arrow keys.
+ * @default 1
+ * @type Number
+ */
+ carousel.setAttributeConfig("scrollIncrement", {
+ validator : carousel._validateScrollIncrement,
+ value : attrs.scrollIncrement || 1
+ });
+
+ /**
+ * @attribute selectedItem
+ * @description The index of the selected item.
+ * @type Number
+ */
+ carousel.setAttributeConfig("selectedItem", {
+ method : carousel._setSelectedItem,
+ validator : JS.isNumber,
+ value : -1
+ });
+
+ /**
+ * @attribute revealAmount
+ * @description The percentage of the item to be revealed on each
+ * side of the Carousel (before and after the first and last item
+ * in the Carousel's viewport.)
+ * @default 0
+ * @type Number
+ */
+ carousel.setAttributeConfig("revealAmount", {
+ method : carousel._setRevealAmount,
+ validator : carousel._validateRevealAmount,
+ value : attrs.revealAmount || 0
+ });
+
+ /**
+ * @attribute isCircular
+ * @description Set this to true to wrap scrolling of the contents
+ * in the Carousel.
+ * @default false
+ * @type Boolean
+ */
+ carousel.setAttributeConfig("isCircular", {
+ validator : JS.isBoolean,
+ value : attrs.isCircular || false
+ });
+
+ /**
+ * @attribute isVertical
+ * @description True if the orientation of the Carousel is vertical
+ * @default false
+ * @type Boolean
+ */
+ carousel.setAttributeConfig("isVertical", {
+ method : carousel._setOrientation,
+ validator : JS.isBoolean,
+ value : attrs.isVertical || false
+ });
+
+ /**
+ * @attribute navigation
+ * @description The set of navigation controls for Carousel
+ * @default <br>
+ * { prev: null, // the previous navigation element<br>
+ * next: null } // the next navigation element
+ * @type Object
+ */
+ carousel.setAttributeConfig("navigation", {
+ method : carousel._setNavigation,
+ validator : carousel._validateNavigation,
+ value :
+ attrs.navigation || {prev: null,next: null,page: null}
+ });
+
+ /**
+ * @attribute animation
+ * @description The optional animation attributes for the Carousel.
+ * @default <br>
+ * { speed: 0, // the animation speed (in seconds)<br>
+ * effect: null } // the animation effect (like
+ * YAHOO.util.Easing.easeOut)
+ * @type Object
+ */
+ carousel.setAttributeConfig("animation", {
+ validator : carousel._validateAnimation,
+ value : attrs.animation || { speed: 0, effect: null }
+ });
+
+ /**
+ * @attribute autoPlay
+ * @description Set this to time in milli-seconds to have the
+ * Carousel automatically scroll the contents.
+ * @type Number
+ * @deprecated Use autoPlayInterval instead.
+ */
+ carousel.setAttributeConfig("autoPlay", {
+ validator : JS.isNumber,
+ value : attrs.autoPlay || 0
+ });
+
+ /**
+ * @attribute autoPlayInterval
+ * @description The delay in milli-seconds for scrolling the
+ * Carousel during auto-play.
+ * Note: The startAutoPlay() method needs to be invoked to trigger
+ * automatic scrolling of Carousel.
+ * @type Number
+ */
+ carousel.setAttributeConfig("autoPlayInterval", {
+ validator : JS.isNumber,
+ value : attrs.autoPlayInterval || 0
+ });
+ },
+
+ /**
+ * Initialize and bind the event handlers.
+ *
+ * @method initEvents
+ * @public
+ */
+ initEvents: function () {
+ var carousel = this,
+ cssClass = carousel.CLASSES,
+ focussedLi;
+
+ carousel.on("keydown", carousel._keyboardEventHandler);
+
+ carousel.on(afterScrollEvent, syncNavigation);
+
+ carousel.on(itemAddedEvent, syncUi);
+
+ carousel.on(itemRemovedEvent, syncUi);
+
+ carousel.on(itemSelectedEvent, function () {
+ if (carousel._hasFocus) {
+ carousel.focus();
+ }
+ });
+
+ carousel.on(loadItemsEvent, syncUi);
+
+ carousel.on(allItemsRemovedEvent, function (ev) {
+ carousel.scrollTo(0);
+ syncNavigation.call(carousel);
+ syncPagerUi.call(carousel);
+ });
+
+ carousel.on(pageChangeEvent, syncPagerUi, carousel);
+
+ carousel.on(renderEvent, function (ev) {
+ carousel.set("selectedItem", carousel.get("firstVisible"));
+ syncNavigation.call(carousel, ev);
+ syncPagerUi.call(carousel, ev);
+ carousel._setClipContainerSize();
+ });
+
+ carousel.on("selectedItemChange", function (ev) {
+ setItemSelection.call(carousel, ev.newValue, ev.prevValue);
+ if (ev.newValue >= 0) {
+ carousel._updateTabIndex(
+ carousel.getElementForItem(ev.newValue));
+ }
+ carousel.fireEvent(itemSelectedEvent, ev.newValue);
+ });
+
+ carousel.on(uiUpdateEvent, function (ev) {
+ syncNavigation.call(carousel, ev);
+ syncPagerUi.call(carousel, ev);
+ });
+
+ carousel.on("firstVisibleChange", function (ev) {
+ if (!carousel.get("selectOnScroll")) {
+ if (ev.newValue >= 0) {
+ carousel._updateTabIndex(
+ carousel.getElementForItem(ev.newValue));
+ }
+ }
+ });
+
+ // Handle item selection on mouse click
+ carousel.on("click", function (ev) {
+ if (carousel.isAutoPlayOn()) {
+ carousel.stopAutoPlay();
+ }
+ carousel._itemClickHandler(ev);
+ carousel._pagerClickHandler(ev);
+ });
+
+ // Restore the focus on the navigation buttons
+
+ Event.onFocus(carousel.get("element"), function (ev, obj) {
+ var target = Event.getTarget(ev);
+
+ if (target && target.nodeName.toUpperCase() == "A" &&
+ Dom.getAncestorByClassName(target, cssClass.NAVIGATION)) {
+ if (focussedLi) {
+ Dom.removeClass(focussedLi, cssClass.PAGE_FOCUS);
+ }
+ focussedLi = target.parentNode;
+ Dom.addClass(focussedLi, cssClass.PAGE_FOCUS);
+ } else {
+ if (focussedLi) {
+ Dom.removeClass(focussedLi, cssClass.PAGE_FOCUS);
+ }
+ }
+
+ obj._hasFocus = true;
+ obj._updateNavButtons(Event.getTarget(ev), true);
+ }, carousel);
+
+ Event.onBlur(carousel.get("element"), function (ev, obj) {
+ obj._hasFocus = false;
+ obj._updateNavButtons(Event.getTarget(ev), false);
+ }, carousel);
+ },
+
+ /**
+ * Return true if the Carousel is still animating, or false otherwise.
+ *
+ * @method isAnimating
+ * @return {Boolean} Return true if animation is still in progress, or
+ * false otherwise.
+ * @public
+ */
+ isAnimating: function () {
+ return this._isAnimationInProgress;
+ },
+
+ /**
+ * Return true if the auto-scrolling of Carousel is "on", or false
+ * otherwise.
+ *
+ * @method isAutoPlayOn
+ * @return {Boolean} Return true if autoPlay is "on", or false
+ * otherwise.
+ * @public
+ */
+ isAutoPlayOn: function () {
+ return this._isAutoPlayInProgress;
+ },
+
+ /**
+ * Return the carouselItemEl at index or null if the index is not
+ * found.
+ *
+ * @method getElementForItem
+ * @param index {Number} The index of the item to be returned
+ * @return {Element} Return the item at index or null if not found
+ * @public
+ */
+ getElementForItem: function (index) {
+ var carousel = this;
+
+ if (index < 0 || index >= carousel.get("numItems")) {
+ return null;
+ }
+
+ // TODO: may be cache the item
+ if (carousel._itemsTable.numItems > index) {
+ if (!JS.isUndefined(carousel._itemsTable.items[index])) {
+ return Dom.get(carousel._itemsTable.items[index].id);
+ }
+ }
+
+ return null;
+ },
+
+ /**
+ * Return the carouselItemEl for all items in the Carousel.
+ *
+ * @method getElementForItems
+ * @return {Array} Return all the items
+ * @public
+ */
+ getElementForItems: function () {
+ var carousel = this, els = [], i;
+
+ for (i = 0; i < carousel._itemsTable.numItems; i++) {
+ els.push(carousel.getElementForItem(i));
+ }
+
+ return els;
+ },
+
+ /**
+ * Return the item at index or null if the index is not found.
+ *
+ * @method getItem
+ * @param index {Number} The index of the item to be returned
+ * @return {Object} Return the item at index or null if not found
+ * @public
+ */
+ getItem: function (index) {
+ var carousel = this;
+
+ if (index < 0 || index >= carousel.get("numItems")) {
+ return null;
+ }
+
+ if (carousel._itemsTable.numItems > index) {
+ if (!JS.isUndefined(carousel._itemsTable.items[index])) {
+ return carousel._itemsTable.items[index];
+ }
+ }
+
+ return null;
+ },
+
+ /**
+ * Return all items as an array.
+ *
+ * @method getItems
+ * @return {Array} Return all items in the Carousel
+ * @public
+ */
+ getItems: function (index) {
+ return this._itemsTable.items;
+ },
+
+ /**
+ * Return the position of the Carousel item that has the id "id", or -1
+ * if the id is not found.
+ *
+ * @method getItemPositionById
+ * @param index {Number} The index of the item to be returned
+ * @public
+ */
+ getItemPositionById: function (id) {
+ var carousel = this, i = 0, n = carousel._itemsTable.numItems;
+
+ while (i < n) {
+ if (!JS.isUndefined(carousel._itemsTable.items[i])) {
+ if (carousel._itemsTable.items[i].id == id) {
+ return i;
+ }
+ }
+ i++;
+ }
+
+ return -1;
+ },
+
+ /**
+ * Return all visible items as an array.
+ *
+ * @method getVisibleItems
+ * @return {Array} The array of visible items
+ * @public
+ */
+ getVisibleItems: function () {
+ var carousel = this,
+ i = carousel.get("firstVisible"),
+ n = i + carousel.get("numVisible"),
+ r = [];
+
+ while (i < n) {
+ r.push(carousel.getElementForItem(i));
+ i++;
+ }
+
+ return r;
+ },
+
+ /**
+ * Remove an item at index from the Carousel.
+ *
+ * @method removeItem
+ * @public
+ * @param index {Number} The position to where in the list (starts from
+ * zero).
+ * @return {Boolean} Return true on success, false otherwise
+ */
+ removeItem: function (index) {
+ var carousel = this,
+ item,
+ num = carousel.get("numItems");
+
+ if (index < 0 || index >= num) {
+ return false;
+ }
+
+ item = carousel._itemsTable.items.splice(index, 1);
+ if (item && item.length == 1) {
+ carousel._itemsTable.numItems--;
+ carousel.set("numItems", num - 1);
+
+ carousel.fireEvent(itemRemovedEvent,
+ { item: item[0], pos: index, ev: itemRemovedEvent });
+ return true;
+ }
+
+ return false;
+ },
+
+ /**
+ * Render the Carousel.
+ *
+ * @method render
+ * @public
+ * @param appendTo {HTMLElement | String} The element to which the
+ * Carousel should be appended prior to rendering.
+ * @return {Boolean} Status of the operation
+ */
+ render: function (appendTo) {
+ var carousel = this,
+ cssClass = carousel.CLASSES;
+
+ carousel.addClass(cssClass.CAROUSEL);
+
+ if (!carousel._clipEl) {
+ carousel._clipEl = carousel._createCarouselClip();
+ carousel._clipEl.appendChild(carousel._carouselEl);
+ }
+
+ if (appendTo) {
+ carousel.appendChild(carousel._clipEl);
+ carousel.appendTo(appendTo);
+ } else {
+ if (!Dom.inDocument(carousel.get("element"))) {
+ return false;
+ }
+ carousel.appendChild(carousel._clipEl);
+ }
+
+ if (carousel.get("isVertical")) {
+ carousel.addClass(cssClass.VERTICAL);
+ } else {
+ carousel.addClass(cssClass.HORIZONTAL);
+ }
+
+ if (carousel.get("numItems") < 1) {
+ return false;
+ }
+
+ carousel._refreshUi();
+
+ return true;
+ },
+
+ /**
+ * Scroll the Carousel by an item backward.
+ *
+ * @method scrollBackward
+ * @public
+ */
+ scrollBackward: function () {
+ var carousel = this;
+
+ carousel.scrollTo(carousel._firstItem -
+ carousel.get("scrollIncrement"));
+ },
+
+ /**
+ * Scroll the Carousel by an item forward.
+ *
+ * @method scrollForward
+ * @public
+ */
+ scrollForward: function () {
+ var carousel = this;
+
+ carousel.scrollTo(carousel._firstItem +
+ carousel.get("scrollIncrement"));
+ },
+
+ /**
+ * Scroll the Carousel by a page backward.
+ *
+ * @method scrollPageBackward
+ * @public
+ */
+ scrollPageBackward: function () {
+ var carousel = this,
+ item = carousel._firstItem - carousel.get("numVisible");
+
+ if (carousel.get("selectOnScroll")) {
+ carousel._selectedItem = carousel._getSelectedItem(item);
+ } else {
+ item = carousel._getValidIndex(item);
+ }
+ carousel.scrollTo(item);
+ },
+
+ /**
+ * Scroll the Carousel by a page forward.
+ *
+ * @method scrollPageForward
+ * @public
+ */
+ scrollPageForward: function () {
+ var carousel = this,
+ item = carousel._firstItem + carousel.get("numVisible");
+
+ if (carousel.get("selectOnScroll")) {
+ carousel._selectedItem = carousel._getSelectedItem(item);
+ } else {
+ item = carousel._getValidIndex(item);
+ }
+ carousel.scrollTo(item);
+ },
+
+ /**
+ * Scroll the Carousel to make the item the first visible item.
+ *
+ * @method scrollTo
+ * @public
+ * @param item Number The index of the element to position at.
+ * @param dontSelect Boolean True if select should be avoided
+ */
+ scrollTo: function (item, dontSelect) {
+ var carousel = this,
+ animate, animCfg, isCircular, delta, direction, firstItem,
+ numItems, numPerPage, offset, page, rv, sentinel,
+ stopAutoScroll;
+
+ if (JS.isUndefined(item) || item == carousel._firstItem ||
+ carousel.isAnimating()) {
+ return; // nothing to do!
+ }
+
+ animCfg = carousel.get("animation");
+ isCircular = carousel.get("isCircular");
+ firstItem = carousel._firstItem;
+ numItems = carousel.get("numItems");
+ numPerPage = carousel.get("numVisible");
+ page = carousel.get("currentPage");
+ stopAutoScroll = function () {
+ if (carousel.isAutoPlayOn()) {
+ carousel.stopAutoPlay();
+ }
+ };
+
+ if (item < 0) {
+ if (isCircular) {
+ item = numItems + item;
+ } else {
+ stopAutoScroll.call(carousel);
+ return;
+ }
+ } else if (numItems > 0 && item > numItems - 1) {
+ if (carousel.get("isCircular")) {
+ item = numItems - item;
+ } else {
+ stopAutoScroll.call(carousel);
+ return;
+ }
+ }
+
+ direction = (carousel._firstItem > item) ? "backward" : "forward";
+
+ sentinel = firstItem + numPerPage;
+ sentinel = (sentinel > numItems - 1) ? numItems - 1 : sentinel;
+ rv = carousel.fireEvent(beforeScrollEvent,
+ { dir: direction, first: firstItem, last: sentinel });
+ if (rv === false) { // scrolling is prevented
+ return;
+ }
+
+ carousel.fireEvent(beforePageChangeEvent, { page: page });
+
+ delta = firstItem - item; // yes, the delta is reverse
+ carousel._firstItem = item;
+ carousel.set("firstVisible", item);
+
+
+ carousel._loadItems(); // do we have all the items to display?
+
+ sentinel = item + numPerPage;
+ sentinel = (sentinel > numItems - 1) ? numItems - 1 : sentinel;
+
+ offset = getScrollOffset.call(carousel, delta);
+
+ animate = animCfg.speed > 0;
+
+ if (animate) {
+ carousel._animateAndSetCarouselOffset(offset, item, sentinel,
+ dontSelect);
+ } else {
+ carousel._setCarouselOffset(offset);
+ updateStateAfterScroll.call(carousel, item, sentinel);
+ }
+ },
+
+ /**
+ * Select the previous item in the Carousel.
+ *
+ * @method selectPreviousItem
+ * @public
+ */
+ selectPreviousItem: function () {
+ var carousel = this,
+ newpos = 0,
+ selected = carousel.get("selectedItem");
+
+ if (selected == this._firstItem) {
+ newpos = selected - carousel.get("numVisible");
+ carousel._selectedItem = carousel._getSelectedItem(selected-1);
+ carousel.scrollTo(newpos);
+ } else {
+ newpos = carousel.get("selectedItem") -
+ carousel.get("scrollIncrement");
+ carousel.set("selectedItem",carousel._getSelectedItem(newpos));
+ }
+ },
+
+ /**
+ * Select the next item in the Carousel.
+ *
+ * @method selectNextItem
+ * @public
+ */
+ selectNextItem: function () {
+ var carousel = this, newpos = 0;
+
+ newpos = carousel.get("selectedItem") +
+ carousel.get("scrollIncrement");
+ carousel.set("selectedItem", carousel._getSelectedItem(newpos));
+ },
+
+ /**
+ * Display the Carousel.
+ *
+ * @method show
+ * @public
+ */
+ show: function () {
+ var carousel = this,
+ cssClass = carousel.CLASSES;
+
+ if (carousel.fireEvent(beforeShowEvent) !== false) {
+ carousel.addClass(cssClass.VISIBLE);
+ carousel.fireEvent(showEvent);
+ }
+ },
+
+ /**
+ * Start auto-playing the Carousel.
+ *
+ * @method startAutoPlay
+ * @public
+ */
+ startAutoPlay: function () {
+ var carousel = this, timer;
+
+ if (JS.isUndefined(carousel._autoPlayTimer)) {
+ timer = carousel.get("autoPlayInterval");
+ if (timer <= 0) {
+ return;
+ }
+ carousel._isAutoPlayInProgress = true;
+ carousel.fireEvent(startAutoPlayEvent);
+ carousel._autoPlayTimer = setTimeout(function () {
+ carousel._autoScroll();
+ }, timer);
+ }
+ },
+
+ /**
+ * Stop auto-playing the Carousel.
+ *
+ * @method stopAutoPlay
+ * @public
+ */
+ stopAutoPlay: function () {
+ var carousel = this;
+
+ if (!JS.isUndefined(carousel._autoPlayTimer)) {
+ clearTimeout(carousel._autoPlayTimer);
+ delete carousel._autoPlayTimer;
+ carousel._isAutoPlayInProgress = false;
+ carousel.fireEvent(stopAutoPlayEvent);
+ }
+ },
+
+ /**
+ * Return the string representation of the Carousel.
+ *
+ * @method toString
+ * @public
+ * @return {String}
+ */
+ toString: function () {
+ return WidgetName + (this.get ? " (#" + this.get("id") + ")" : "");
+ },
+
+ /*
+ * Protected methods of the Carousel component
+ */
+
+ /**
+ * Set the Carousel offset to the passed offset after animating.
+ *
+ * @method _animateAndSetCarouselOffset
+ * @param {Integer} offset The offset to which the Carousel has to be
+ * scrolled to.
+ * @param {Integer} item The index to which the Carousel will scroll.
+ * @param {Integer} sentinel The last element in the view port.
+ * @protected
+ */
+ _animateAndSetCarouselOffset: function (offset, item, sentinel) {
+ var carousel = this,
+ animCfg = carousel.get("animation"),
+ animObj = null;
+
+ if (carousel.get("isVertical")) {
+ animObj = new YAHOO.util.Motion(carousel._carouselEl,
+ { points: { by: [0, offset] } },
+ animCfg.speed, animCfg.effect);
+ } else {
+ animObj = new YAHOO.util.Motion(carousel._carouselEl,
+ { points: { by: [offset, 0] } },
+ animCfg.speed, animCfg.effect);
+ }
+
+ carousel._isAnimationInProgress = true;
+ animObj.onComplete.subscribe(carousel._animationCompleteHandler,
+ { scope: carousel, item: item,
+ last: sentinel });
+ animObj.animate();
+ },
+
+ /**
+ * Handle the animation complete event.
+ *
+ * @method _animationCompleteHandler
+ * @param {Event} ev The event.
+ * @param {Array} p The event parameters.
+ * @param {Object} o The object that has the state of the Carousel
+ * @protected
+ */
+ _animationCompleteHandler: function (ev, p, o) {
+ o.scope._isAnimationInProgress = false;
+ updateStateAfterScroll.call(o.scope, o.item, o.last);
+ },
+
+ /**
+ * Automatically scroll the contents of the Carousel.
+ * @method _autoScroll
+ * @protected
+ */
+ _autoScroll: function() {
+ var carousel = this,
+ currIndex = carousel._firstItem,
+ index;
+
+ if (currIndex >= carousel.get("numItems") - 1) {
+ if (carousel.get("isCircular")) {
+ index = 0;
+ } else {
+ carousel.stopAutoPlay();
+ }
+ } else {
+ index = currIndex + carousel.get("numVisible");
+ }
+
+ carousel._selectedItem = carousel._getSelectedItem(index);
+ carousel.scrollTo.call(carousel, index);
+ },
+
+ /**
+ * Create the Carousel.
+ *
+ * @method createCarousel
+ * @param elId {String} The id of the element to be created
+ * @protected
+ */
+ _createCarousel: function (elId) {
+ var carousel = this,
+ cssClass = carousel.CLASSES,
+ el = Dom.get(elId);
+
+ if (!el) {
+ el = createElement("DIV", {
+ className : cssClass.CAROUSEL,
+ id : elId
+ });
+ }
+
+ if (!carousel._carouselEl) {
+ carousel._carouselEl=createElement(carousel.get("carouselEl"),
+ { className: cssClass.CAROUSEL_EL });
+ }
+
+ return el;
+ },
+
+ /**
+ * Create the Carousel clip container.
+ *
+ * @method createCarouselClip
+ * @protected
+ */
+ _createCarouselClip: function () {
+ return createElement("DIV", { className: this.CLASSES.CONTENT });
+ },
+
+ /**
+ * Create the Carousel item.
+ *
+ * @method createCarouselItem
+ * @param obj {Object} The attributes of the element to be created
+ * @protected
+ */
+ _createCarouselItem: function (obj) {
+ return createElement(this.get("carouselItemEl"), {
+ className : obj.className,
+ content : obj.content,
+ id : obj.id
+ });
+ },
+
+ /**
+ * Return a valid item for a possibly out of bounds index considering
+ * the isCircular property.
+ *
+ * @method _getValidIndex
+ * @param index {Number} The index of the item to be returned
+ * @return {Object} Return a valid item index
+ * @protected
+ */
+ _getValidIndex: function (index) {
+ var carousel = this,
+ isCircular = carousel.get("isCircular"),
+ numItems = carousel.get("numItems"),
+ sentinel = numItems - 1;
+
+ if (index < 0) {
+ index = isCircular ? numItems + index : 0;
+ } else if (index > sentinel) {
+ index = isCircular ? index - numItems : sentinel;
+ }
+
+ return index;
+ },
+
+ /**
+ * Get the value for the selected item.
+ *
+ * @method _getSelectedItem
+ * @param val {Number} The new value for "selected" item
+ * @return {Number} The new value that would be set
+ * @protected
+ */
+ _getSelectedItem: function (val) {
+ var carousel = this,
+ isCircular = carousel.get("isCircular"),
+ numItems = carousel.get("numItems"),
+ sentinel = numItems - 1;
+
+ if (val < 0) {
+ if (isCircular) {
+ val = numItems + val;
+ } else {
+ val = carousel.get("selectedItem");
+ }
+ } else if (val > sentinel) {
+ if (isCircular) {
+ val = val - numItems;
+ } else {
+ val = carousel.get("selectedItem");
+ }
+ }
+
+ return val;
+ },
+
+ /**
+ * The "click" handler for the item.
+ *
+ * @method _itemClickHandler
+ * @param {Event} ev The event object
+ * @protected
+ */
+ _itemClickHandler: function (ev) {
+ var carousel = this,
+ container = carousel.get("element"),
+ el,
+ item,
+ target = YAHOO.util.Event.getTarget(ev);
+
+ while (target && target != container &&
+ target.id != carousel._carouselEl) {
+ el = target.nodeName;
+ if (el.toUpperCase() == carousel.get("carouselItemEl")) {
+ break;
+ }
+ target = target.parentNode;
+ }
+
+ if ((item = carousel.getItemPositionById(target.id)) >= 0) {
+ carousel.set("selectedItem", carousel._getSelectedItem(item));
+ carousel.focus();
+ }
+ },
+
+ /**
+ * The keyboard event handler for Carousel.
+ *
+ * @method _keyboardEventHandler
+ * @param ev {Event} The event that is being handled.
+ * @protected
+ */
+ _keyboardEventHandler: function (ev) {
+ var carousel = this,
+ key = Event.getCharCode(ev),
+ prevent = false;
+
+ if (carousel.isAnimating()) {
+ return; // do not mess while animation is in progress
+ }
+
+ switch (key) {
+ case 0x25: // left arrow
+ case 0x26: // up arrow
+ carousel.selectPreviousItem();
+ prevent = true;
+ break;
+ case 0x27: // right arrow
+ case 0x28: // down arrow
+ carousel.selectNextItem();
+ prevent = true;
+ break;
+ case 0x21: // page-up
+ carousel.scrollPageBackward();
+ prevent = true;
+ break;
+ case 0x22: // page-down
+ carousel.scrollPageForward();
+ prevent = true;
+ break;
+ }
+
+ if (prevent) {
+ if (carousel.isAutoPlayOn()) {
+ carousel.stopAutoPlay();
+ }
+ Event.preventDefault(ev);
+ }
+ },
+
+ /**
+ * The load the required set of items that are needed for display.
+ *
+ * @method _loadItems
+ * @protected
+ */
+ _loadItems: function() {
+ var carousel = this,
+ first = carousel.get("firstVisible"),
+ last = 0,
+ numItems = carousel.get("numItems"),
+ numVisible = carousel.get("numVisible"),
+ reveal = carousel.get("revealAmount");
+
+ last = first + numVisible - 1 + (reveal ? 1 : 0);
+ last = last > numItems - 1 ? numItems - 1 : last;
+
+ if (!carousel.getItem(first) || !carousel.getItem(last)) {
+ carousel.fireEvent(loadItemsEvent, {
+ ev: loadItemsEvent, first: first, last: last,
+ num: last - first
+ });
+ }
+ },
+
+ /**
+ * The "click" handler for the pager navigation.
+ *
+ * @method _pagerClickHandler
+ * @param {Event} ev The event object
+ * @protected
+ */
+ _pagerClickHandler: function (ev) {
+ var carousel = this,
+ pos,
+ target = Event.getTarget(ev),
+ val;
+
+ function getPagerNode(el) {
+ var itemEl = carousel.get("carouselItemEl");
+
+ if (el.nodeName.toUpperCase() == itemEl.toUpperCase()) {
+ el = Dom.getChildrenBy(el, function (node) {
+ // either an anchor or select at least
+ return node.href || node.value;
+ });
+ if (el && el[0]) {
+ return el[0];
+ }
+ } else if (el.href || el.value) {
+ return el;
+ }
+
+ return null;
+ }
+
+ if (target) {
+ target = getPagerNode(target);
+ if (!target) {
+ return;
+ }
+ val = target.href || target.value;
+ if (JS.isString(val) && val) {
+ pos = val.lastIndexOf("#");
+ if (pos != -1) {
+ val = carousel.getItemPositionById(
+ val.substring(pos + 1));
+ carousel._selectedItem = val;
+ carousel.scrollTo(val);
+ if (!target.value) { // not a select element
+ carousel.focus();
+ }
+ Event.preventDefault(ev);
+ }
+ }
+ }
+ },
+
+ /**
+ * Find the Carousel within a container. The Carousel is identified by
+ * the first element that matches the carousel element tag or the
+ * element that has the Carousel class.
+ *
+ * @method parseCarousel
+ * @param parent {HTMLElement} The parent element to look under
+ * @return {Boolean} True if Carousel is found, false otherwise
+ * @protected
+ */
+ _parseCarousel: function (parent) {
+ var carousel = this, child, cssClass, domEl, found, node;
+
+ cssClass = carousel.CLASSES;
+ domEl = carousel.get("carouselEl");
+ found = false;
+
+ for (child = parent.firstChild; child; child = child.nextSibling) {
+ if (child.nodeType == 1) {
+ node = child.nodeName;
+ if (node.toUpperCase() == domEl) {
+ carousel._carouselEl = child;
+ Dom.addClass(carousel._carouselEl,
+ carousel.CLASSES.CAROUSEL_EL);
+ found = true;
+ }
+ }
+ }
+
+ return found;
+ },
+
+ /**
+ * Find the items within the Carousel and add them to the items table.
+ * A Carousel item is identified by elements that matches the carousel
+ * item element tag.
+ *
+ * @method parseCarouselItems
+ * @protected
+ */
+ _parseCarouselItems: function () {
+ var carousel = this,
+ child,
+ domItemEl,
+ elId,
+ node,
+ parent = carousel._carouselEl;
+
+ domItemEl = carousel.get("carouselItemEl");
+
+ for (child = parent.firstChild; child; child = child.nextSibling) {
+ if (child.nodeType == 1) {
+ node = child.nodeName;
+ if (node.toUpperCase() == domItemEl) {
+ if (child.id) {
+ elId = child.id;
+ } else {
+ elId = Dom.generateId();
+ child.setAttribute("id", elId);
+ }
+ carousel.addItem(child);
+ }
+ }
+ }
+ },
+
+ /**
+ * Find the Carousel navigation within a container. The navigation
+ * elements need to match the carousel navigation class names.
+ *
+ * @method parseCarouselNavigation
+ * @param parent {HTMLElement} The parent element to look under
+ * @return {Boolean} True if at least one is found, false otherwise
+ * @protected
+ */
+ _parseCarouselNavigation: function (parent) {
+ var carousel = this,
+ cfg,
+ cssClass = carousel.CLASSES,
+ el,
+ i,
+ j,
+ nav,
+ rv = false;
+
+ nav = Dom.getElementsByClassName(cssClass.PREV_PAGE, "*", parent);
+ if (nav.length > 0) {
+ for (i in nav) {
+ if (nav.hasOwnProperty(i)) {
+ el = nav[i];
+ if (el.nodeName == "INPUT" ||
+ el.nodeName == "BUTTON") {
+ carousel._navBtns.prev.push(el);
+ } else {
+ j = el.getElementsByTagName("INPUT");
+ if (JS.isArray(j) && j.length > 0) {
+ carousel._navBtns.prev.push(j[0]);
+ } else {
+ j = el.getElementsByTagName("BUTTON");
+ if (JS.isArray(j) && j.length > 0) {
+ carousel._navBtns.prev.push(j[0]);
+ }
+ }
+ }
+ }
+ }
+ cfg = { prev: nav };
+ }
+
+ nav = Dom.getElementsByClassName(cssClass.NEXT_PAGE, "*", parent);
+ if (nav.length > 0) {
+ for (i in nav) {
+ if (nav.hasOwnProperty(i)) {
+ el = nav[i];
+ if (el.nodeName == "INPUT" ||
+ el.nodeName == "BUTTON") {
+ carousel._navBtns.next.push(el);
+ } else {
+ j = el.getElementsByTagName("INPUT");
+ if (JS.isArray(j) && j.length > 0) {
+ carousel._navBtns.next.push(j[0]);
+ } else {
+ j = el.getElementsByTagName("BUTTON");
+ if (JS.isArray(j) && j.length > 0) {
+ carousel._navBtns.next.push(j[0]);
+ }
+ }
+ }
+ }
+ }
+ if (cfg) {
+ cfg.next = nav;
+ } else {
+ cfg = { next: nav };
+ }
+ }
+
+ if (cfg) {
+ carousel.set("navigation", cfg);
+ rv = true;
+ }
+
+ return rv;
+ },
+
+ /**
+ * Refresh the widget UI if it is not already rendered, on first item
+ * addition.
+ *
+ * @method _refreshUi
+ * @protected
+ */
+ _refreshUi: function () {
+ var carousel = this;
+
+ // Set the rendered state appropriately.
+ carousel._hasRendered = true;
+ carousel.fireEvent(renderEvent);
+ },
+
+ /**
+ * Set the Carousel offset to the passed offset.
+ *
+ * @method _setCarouselOffset
+ * @protected
+ */
+ _setCarouselOffset: function (offset) {
+ var carousel = this, which;
+
+ which = carousel.get("isVertical") ? "top" : "left";
+ offset += offset !== 0 ? getStyle(carousel._carouselEl, which) : 0;
+ Dom.setStyle(carousel._carouselEl, which, offset + "px");
+ },
+
+ /**
+ * Setup/Create the Carousel navigation element (if needed).
+ *
+ * @method _setupCarouselNavigation
+ * @protected
+ */
+ _setupCarouselNavigation: function () {
+ var carousel = this,
+ btn, cfg, cssClass, nav, navContainer, nextButton, prevButton;
+
+ cssClass = carousel.CLASSES;
+
+ // TODO: can the _navBtns be tested against instead?
+ navContainer = Dom.getElementsByClassName(cssClass.NAVIGATION,
+ "DIV", carousel.get("element"));
+
+ if (navContainer.length === 0) {
+ navContainer = createElement("DIV",
+ { className: cssClass.NAVIGATION });
+ carousel.insertBefore(navContainer,
+ Dom.getFirstChild(carousel.get("element")));
+ } else {
+ navContainer = navContainer[0];
+ }
+
+ carousel._pages.el = createElement("UL");
+ navContainer.appendChild(carousel._pages.el);
+
+ nav = carousel.get("navigation");
+ if (JS.isString(nav.prev) || JS.isArray(nav.prev)) {
+ if (JS.isString(nav.prev)) {
+ nav.prev = [nav.prev];
+ }
+ for (btn in nav.prev) {
+ if (nav.prev.hasOwnProperty(btn)) {
+ carousel._navBtns.prev.push(Dom.get(nav.prev[btn]));
+ }
+ }
+ } else {
+ // TODO: separate method for creating a navigation button
+ prevButton = createElement("SPAN",
+ { className: cssClass.BUTTON + cssClass.FIRST_NAV });
+ // XXX: for IE 6.x
+ Dom.setStyle(prevButton, "visibility", "visible");
+ btn = Dom.generateId();
+ prevButton.innerHTML = "<button type=\"button\" " +
+ "id=\"" + btn + "\" name=\"" +
+ carousel.STRINGS.PREVIOUS_BUTTON_TEXT + "\">" +
+ carousel.STRINGS.PREVIOUS_BUTTON_TEXT + "</button>";
+ navContainer.appendChild(prevButton);
+ btn = Dom.get(btn);
+ carousel._navBtns.prev = [btn];
+ cfg = { prev: [prevButton] };
+ }
+
+ if (JS.isString(nav.next) || JS.isArray(nav.next)) {
+ if (JS.isString(nav.next)) {
+ nav.next = [nav.next];
+ }
+ for (btn in nav.next) {
+ if (nav.next.hasOwnProperty(btn)) {
+ carousel._navBtns.next.push(Dom.get(nav.next[btn]));
+ }
+ }
+ } else {
+ // TODO: separate method for creating a navigation button
+ nextButton = createElement("SPAN",
+ { className: cssClass.BUTTON + cssClass.NEXT_NAV });
+ // XXX: for IE 6.x
+ Dom.setStyle(nextButton, "visibility", "visible");
+ btn = Dom.generateId();
+ nextButton.innerHTML = "<button type=\"button\" " +
+ "id=\"" + btn + "\" name=\"" +
+ carousel.STRINGS.NEXT_BUTTON_TEXT + "\">" +
+ carousel.STRINGS.NEXT_BUTTON_TEXT + "</button>";
+ navContainer.appendChild(nextButton);
+ btn = Dom.get(btn);
+ carousel._navBtns.next = [btn];
+ if (cfg) {
+ cfg.next = [nextButton];
+ } else {
+ cfg = { next: [nextButton] };
+ }
+ }
+
+ if (cfg) {
+ carousel.set("navigation", cfg);
+ }
+
+ return navContainer;
+ },
+
+ /**
+ * Set the clip container size (based on the new numVisible value).
+ *
+ * @method _setClipContainerSize
+ * @param clip {HTMLElement} The clip container element.
+ * @param num {Number} optional The number of items per page.
+ * @protected
+ */
+ _setClipContainerSize: function (clip, num) {
+ var carousel = this,
+ attr, currVal, isVertical, itemSize, reveal, size, which;
+
+ isVertical = carousel.get("isVertical");
+ reveal = carousel.get("revealAmount");
+ which = isVertical ? "height" : "width";
+ attr = isVertical ? "top" : "left";
+
+ clip = clip || carousel._clipEl;
+ if (!clip) {
+ return;
+ }
+
+ num = num || carousel.get("numVisible");
+ itemSize = getCarouselItemSize.call(carousel, which);
+ size = itemSize * num;
+
+ // TODO: try to re-use the _hasRendered indicator
+ carousel._recomputeSize = (size === 0); // bleh!
+ if (carousel._recomputeSize) {
+ carousel._hasRendered = false;
+ return; // no use going further, bail out!
+ }
+
+ if (reveal > 0) {
+ reveal = itemSize * (reveal / 100) * 2;
+ size += reveal;
+ // TODO: set the Carousel's initial offset somwehere
+ currVal = parseFloat(Dom.getStyle(carousel._carouselEl, attr));
+ currVal = JS.isNumber(currVal) ? currVal : 0;
+ Dom.setStyle(carousel._carouselEl,
+ attr, currVal + (reveal / 2) + "px");
+ }
+
+ if (isVertical) {
+ size += getStyle(carousel._carouselEl, "marginTop") +
+ getStyle(carousel._carouselEl, "marginBottom") +
+ getStyle(carousel._carouselEl, "paddingTop") +
+ getStyle(carousel._carouselEl, "paddingBottom") +
+ getStyle(carousel._carouselEl, "borderTopWidth") +
+ getStyle(carousel._carouselEl, "borderBottomWidth");
+ // XXX: for vertical Carousel
+ Dom.setStyle(clip, which, (size - (num - 1)) + "px");
+ } else {
+ size += getStyle(carousel._carouselEl, "marginLeft") +
+ getStyle(carousel._carouselEl, "marginRight") +
+ getStyle(carousel._carouselEl, "paddingLeft") +
+ getStyle(carousel._carouselEl, "paddingRight") +
+ getStyle(carousel._carouselEl, "borderLeftWidth") +
+ getStyle(carousel._carouselEl, "borderRightWidth");
+ Dom.setStyle(clip, which, size + "px");
+ }
+
+ carousel._setContainerSize(clip); // adjust the container size too
+ },
+
+ /**
+ * Set the container size.
+ *
+ * @method _setContainerSize
+ * @param clip {HTMLElement} The clip container element.
+ * @param attr {String} Either set the height or width.
+ * @protected
+ */
+ _setContainerSize: function (clip, attr) {
+ var carousel = this,
+ config = carousel.CONFIG,
+ cssClass = carousel.CLASSES,
+ isVertical,
+ size;
+
+ isVertical = carousel.get("isVertical");
+ clip = clip || carousel._clipEl;
+ attr = attr || (isVertical ? "height" : "width");
+ size = parseFloat(Dom.getStyle(clip, attr), 10);
+
+ size = JS.isNumber(size) ? size : 0;
+
+ if (isVertical) {
+ size += getStyle(carousel._carouselEl, "marginTop") +
+ getStyle(carousel._carouselEl, "marginBottom") +
+ getStyle(carousel._carouselEl, "paddingTop") +
+ getStyle(carousel._carouselEl, "paddingBottom") +
+ getStyle(carousel._carouselEl, "borderTopWidth") +
+ getStyle(carousel._carouselEl, "borderBottomWidth") +
+ getStyle(carousel._navEl, "height");
+ } else {
+ size += getStyle(clip, "marginLeft") +
+ getStyle(clip, "marginRight") +
+ getStyle(clip, "paddingLeft") +
+ getStyle(clip, "paddingRight") +
+ getStyle(clip, "borderLeftWidth") +
+ getStyle(clip, "borderRightWidth");
+ }
+
+ if (!isVertical) {
+ if (size < config.HORZ_MIN_WIDTH) {
+ size = config.HORZ_MIN_WIDTH;
+ carousel.addClass(cssClass.MIN_WIDTH);
+ }
+ }
+ carousel.setStyle(attr, size + "px");
+
+ // Additionally the width of the container should be set for
+ // the vertical Carousel
+ if (isVertical) {
+ size = getCarouselItemSize.call(carousel, "width");
+ if (size < config.VERT_MIN_WIDTH) {
+ size = config.VERT_MIN_WIDTH;
+ carousel.addClass(cssClass.MIN_WIDTH);
+ }
+ carousel.setStyle("width", size + "px");
+ }
+ },
+
+ /**
+ * Set the value for the Carousel's first visible item.
+ *
+ * @method _setFirstVisible
+ * @param val {Number} The new value for firstVisible
+ * @return {Number} The new value that would be set
+ * @protected
+ */
+ _setFirstVisible: function (val) {
+ var carousel = this;
+
+ if (val >= 0 && val < carousel.get("numItems")) {
+ carousel.scrollTo(val);
+ } else {
+ val = carousel.get("firstVisible");
+ }
+ return val;
+ },
+
+ /**
+ * Set the value for the Carousel's navigation.
+ *
+ * @method _setNavigation
+ * @param cfg {Object} The navigation configuration
+ * @return {Object} The new value that would be set
+ * @protected
+ */
+ _setNavigation: function (cfg) {
+ var carousel = this;
+
+ if (cfg.prev) {
+ Event.on(cfg.prev, "click", scrollPageBackward, carousel);
+ }
+ if (cfg.next) {
+ Event.on(cfg.next, "click", scrollPageForward, carousel);
+ }
+ },
+
+ /**
+ * Set the value for the number of visible items in the Carousel.
+ *
+ * @method _setNumVisible
+ * @param val {Number} The new value for numVisible
+ * @return {Number} The new value that would be set
+ * @protected
+ */
+ _setNumVisible: function (val) {
+ var carousel = this;
+
+ carousel._setClipContainerSize(carousel._clipEl, val);
+ },
+
+ /**
+ * Set the number of items in the Carousel.
+ * Warning: Setting this to a lower number than the current removes
+ * items from the end.
+ *
+ * @method _setNumItems
+ * @param val {Number} The new value for numItems
+ * @return {Number} The new value that would be set
+ * @protected
+ */
+ _setNumItems: function (val) {
+ var carousel = this,
+ num = carousel._itemsTable.numItems;
+
+ if (JS.isArray(carousel._itemsTable.items)) {
+ if (carousel._itemsTable.items.length != num) { // out of sync
+ num = carousel._itemsTable.items.length;
+ carousel._itemsTable.numItems = num;
+ }
+ }
+
+ if (val < num) {
+ while (num > val) {
+ carousel.removeItem(num - 1);
+ num--;
+ }
+ }
+
+ return val;
+ },
+
+ /**
+ * Set the orientation of the Carousel.
+ *
+ * @method _setOrientation
+ * @param val {Boolean} The new value for isVertical
+ * @return {Boolean} The new value that would be set
+ * @protected
+ */
+ _setOrientation: function (val) {
+ var carousel = this,
+ cssClass = carousel.CLASSES;
+
+ if (val) {
+ carousel.replaceClass(cssClass.HORIZONTAL, cssClass.VERTICAL);
+ } else {
+ carousel.replaceClass(cssClass.VERTICAL, cssClass.HORIZONTAL);
+ }
+ carousel._itemsTable.size = 0; // force recalculation next time
+ return val;
+ },
+
+ /**
+ * Set the value for the reveal amount percentage in the Carousel.
+ *
+ * @method _setRevealAmount
+ * @param val {Number} The new value for revealAmount
+ * @return {Number} The new value that would be set
+ * @protected
+ */
+ _setRevealAmount: function (val) {
+ var carousel = this;
+
+ if (val >= 0 && val <= 100) {
+ val = parseInt(val, 10);
+ val = JS.isNumber(val) ? val : 0;
+ carousel._setClipContainerSize();
+ } else {
+ val = carousel.get("revealAmount");
+ }
+ return val;
+ },
+
+ /**
+ * Set the value for the selected item.
+ *
+ * @method _setSelectedItem
+ * @param val {Number} The new value for "selected" item
+ * @protected
+ */
+ _setSelectedItem: function (val) {
+ this._selectedItem = val;
+ },
+
+ /**
+ * Synchronize and redraw the UI after an item is added.
+ *
+ * @method _syncUiForItemAdd
+ * @protected
+ */
+ _syncUiForItemAdd: function (obj) {
+ var carousel = this,
+ carouselEl = carousel._carouselEl,
+ el,
+ item,
+ itemsTable = carousel._itemsTable,
+ oel,
+ pos,
+ sibling;
+
+ pos = JS.isUndefined(obj.pos) ? itemsTable.numItems - 1 : obj.pos;
+ if (!JS.isUndefined(itemsTable.items[pos])) {
+ item = itemsTable.items[pos];
+ if (item && !JS.isUndefined(item.id)) {
+ oel = Dom.get(item.id);
+ }
+ }
+ if (!oel) {
+ el = carousel._createCarouselItem({
+ className : item.className,
+ content : item.item,
+ id : item.id
+ });
+ if (JS.isUndefined(obj.pos)) {
+ if (!JS.isUndefined(itemsTable.loading[pos])) {
+ oel = itemsTable.loading[pos];
+ // if oel is null, it is a problem ...
+ }
+ if (oel) {
+ // replace the node
+ carouselEl.replaceChild(el, oel);
+ // ... and remove the item from the data structure
+ delete itemsTable.loading[pos];
+ } else {
+ carouselEl.appendChild(el);
+ }
+ } else {
+ if (!JS.isUndefined(itemsTable.items[obj.pos + 1])) {
+ sibling = Dom.get(itemsTable.items[obj.pos + 1].id);
+ }
+ if (sibling) {
+ carouselEl.insertBefore(el, sibling);
+ } else {
+ }
+ }
+ } else {
+ if (JS.isUndefined(obj.pos)) {
+ if (!Dom.isAncestor(carousel._carouselEl, oel)) {
+ carouselEl.appendChild(oel);
+ }
+ } else {
+ if (!Dom.isAncestor(carouselEl, oel)) {
+ if (!JS.isUndefined(itemsTable.items[obj.pos + 1])) {
+ carouselEl.insertBefore(oel,
+ Dom.get(itemsTable.items[obj.pos + 1].id));
+ }
+ }
+ }
+ }
+
+ if (!carousel._hasRendered) {
+ carousel._refreshUi();
+ }
+
+ if (carousel.get("selectedItem") < 0) {
+ carousel.set("selectedItem", carousel.get("firstVisible"));
+ }
+ },
+
+ /**
+ * Synchronize and redraw the UI after an item is removed.
+ *
+ * @method _syncUiForItemAdd
+ * @protected
+ */
+ _syncUiForItemRemove: function (obj) {
+ var carousel = this,
+ carouselEl = carousel._carouselEl,
+ el, item, num, pos;
+
+ num = carousel.get("numItems");
+ item = obj.item;
+ pos = obj.pos;
+
+ if (item && (el = Dom.get(item.id))) {
+ if (el && Dom.isAncestor(carouselEl, el)) {
+ Event.purgeElement(el, true);
+ carouselEl.removeChild(el);
+ }
+
+ if (carousel.get("selectedItem") == pos) {
+ pos = pos >= num ? num - 1 : pos;
+ carousel.set("selectedItem", pos);
+ }
+ } else {
+ }
+ },
+
+ /**
+ * Synchronize and redraw the UI for lazy loading.
+ *
+ * @method _syncUiForLazyLoading
+ * @protected
+ */
+ _syncUiForLazyLoading: function (obj) {
+ var carousel = this,
+ carouselEl = carousel._carouselEl,
+ el,
+ i,
+ itemsTable = carousel._itemsTable,
+ sibling;
+
+ for (i = obj.first; i <= obj.last; i++) {
+ el = carousel._createCarouselItem({
+ className : carousel.CLASSES.ITEM_LOADING,
+ content : carousel.STRINGS.ITEM_LOADING_CONTENT,
+ id : Dom.generateId()
+ });
+ if (el) {
+ if (!JS.isUndefined(itemsTable.items[obj.last + 1])) {
+ sibling = Dom.get(itemsTable.items[obj.last + 1].id);
+ if (sibling) {
+ carouselEl.insertBefore(el, sibling);
+ } else {
+ }
+ } else {
+ carouselEl.appendChild(el);
+ }
+ }
+ itemsTable.loading[i] = el;
+ }
+ },
+
+ /**
+ * Set the correct class for the navigation buttons.
+ *
+ * @method _updateNavButtons
+ * @param el {Object} The target button
+ * @param setFocus {Boolean} True to set focus ring, false otherwise.
+ * @protected
+ */
+ _updateNavButtons: function (el, setFocus) {
+ var children,
+ cssClass = this.CLASSES,
+ grandParent,
+ parent = el.parentNode;
+
+ if (!parent) {
+ return;
+ }
+ grandParent = parent.parentNode;
+
+ if (el.nodeName.toUpperCase() == "BUTTON" &&
+ Dom.hasClass(parent, cssClass.BUTTON)) {
+ if (setFocus) {
+ if (grandParent) {
+ children = Dom.getChildren(grandParent);
+ if (children) {
+ Dom.removeClass(children, cssClass.FOCUSSED_BUTTON);
+ }
+ }
+ Dom.addClass(parent, cssClass.FOCUSSED_BUTTON);
+ } else {
+ Dom.removeClass(parent, cssClass.FOCUSSED_BUTTON);
+ }
+ }
+ },
+
+ /**
+ * Update the UI for the pager buttons based on the current page and
+ * the number of pages.
+ *
+ * @method _updatePagerButtons
+ * @protected
+ */
+ _updatePagerButtons: function () {
+ var carousel = this,
+ css = carousel.CLASSES,
+ cur = carousel._pages.cur, // current page
+ el,
+ html,
+ i,
+ item,
+ n = carousel.get("numVisible"),
+ num = carousel._pages.num, // total pages
+ pager = carousel._pages.el; // the pager container element
+
+ if (num === 0 || !pager) {
+ return; // don't do anything if number of pages is 0
+ }
+
+ // Hide the pager before redrawing it
+ Dom.setStyle(pager, "visibility", "hidden");
+
+ // Remove all nodes from the pager
+ while (pager.firstChild) {
+ pager.removeChild(pager.firstChild);
+ }
+
+ for (i = 0; i < num; i++) {
+ if (JS.isUndefined(carousel._itemsTable.items[i * n])) {
+ Dom.setStyle(pager, "visibility", "visible");
+ break;
+ }
+ item = carousel._itemsTable.items[i * n].id;
+
+ el = document.createElement("LI");
+ if (!el) {
+ Dom.setStyle(pager, "visibility", "visible");
+ break;
+ }
+
+ if (i === 0) {
+ Dom.addClass(el, css.FIRST_PAGE);
+ }
+ if (i == cur) {
+ Dom.addClass(el, css.SELECTED_NAV);
+ }
+
+ // TODO: use a template string for i18N compliance
+ html = "<a href=\"#" + item + "\" tabindex=\"0\"><em>" +
+ carousel.STRINGS.PAGER_PREFIX_TEXT + " " + (i+1) +
+ "</em></a>";
+ el.innerHTML = html;
+
+ pager.appendChild(el);
+ }
+
+ // Show the pager now
+ Dom.setStyle(pager, "visibility", "visible");
+ },
+
+ /**
+ * Update the UI for the pager menu based on the current page and
+ * the number of pages. If the number of pages is greater than
+ * MAX_PAGER_BUTTONS, then the selection of pages is provided by a drop
+ * down menu instead of a set of buttons.
+ *
+ * @method _updatePagerMenu
+ * @protected
+ */
+ _updatePagerMenu: function () {
+ var carousel = this,
+ cur = carousel._pages.cur, // current page
+ el,
+ i,
+ item,
+ n = carousel.get("numVisible"),
+ num = carousel._pages.num, // total pages
+ pager = carousel._pages.el, // the pager container element
+ sel;
+
+ if (num === 0) {
+ return; // don't do anything if number of pages is 0
+ }
+
+ sel = document.createElement("SELECT");
+ if (!sel) {
+ return;
+ }
+
+ // Hide the pager before redrawing it
+ Dom.setStyle(pager, "visibility", "hidden");
+
+ // Remove all nodes from the pager
+ while (pager.firstChild) {
+ pager.removeChild(pager.firstChild);
+ }
+
+ for (i = 0; i < num; i++) {
+ if (JS.isUndefined(carousel._itemsTable.items[i * n])) {
+ Dom.setStyle(pager, "visibility", "visible");
+ break;
+ }
+ item = carousel._itemsTable.items[i * n].id;
+
+ el = document.createElement("OPTION");
+ if (!el) {
+ Dom.setStyle(pager, "visibility", "visible");
+ break;
+ }
+ el.value = "#" + item;
+ // TODO: use a template string for i18N compliance
+ el.innerHTML = carousel.STRINGS.PAGER_PREFIX_TEXT+" "+(i+1);
+
+ if (i == cur) {
+ el.setAttribute("selected", "selected");
+ }
+
+ sel.appendChild(el);
+ }
+
+ el = document.createElement("FORM");
+ if (!el) {
+ } else {
+ el.appendChild(sel);
+ pager.appendChild(el);
+ }
+
+ // Show the pager now
+ Dom.setStyle(pager, "visibility", "visible");
+ },
+
+ /**
+ * Set the correct tab index for the Carousel items.
+ *
+ * @method _updateTabIndex
+ * @param el {Object} The element to be focussed
+ * @protected
+ */
+ _updateTabIndex: function (el) {
+ var carousel = this;
+
+ if (el) {
+ if (carousel._focusableItemEl) {
+ carousel._focusableItemEl.tabIndex = -1;
+ }
+ carousel._focusableItemEl = el;
+ el.tabIndex = 0;
+ }
+ },
+
+ /**
+ * Validate animation parameters.
+ *
+ * @method _validateAnimation
+ * @param cfg {Object} The animation configuration
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateAnimation: function (cfg) {
+ var rv = true;
+
+ if (JS.isObject(cfg)) {
+ if (cfg.speed) {
+ rv = rv && JS.isNumber(cfg.speed);
+ }
+ if (cfg.effect) {
+ rv = rv && JS.isFunction(cfg.effect);
+ } else if (!JS.isUndefined(YAHOO.util.Easing)) {
+ cfg.effect = YAHOO.util.Easing.easeOut;
+ }
+ } else {
+ rv = false;
+ }
+
+ return rv;
+ },
+
+ /**
+ * Validate the firstVisible value.
+ *
+ * @method _validateFirstVisible
+ * @param val {Number} The first visible value
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateFirstVisible: function (val) {
+ var carousel = this, numItems = carousel.get("numItems");
+
+ if (JS.isNumber(val)) {
+ if (numItems === 0 && val == numItems) {
+ return true;
+ } else {
+ return (val >= 0 && val < numItems);
+ }
+ }
+
+ return false;
+ },
+
+ /**
+ * Validate and navigation parameters.
+ *
+ * @method _validateNavigation
+ * @param cfg {Object} The navigation configuration
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateNavigation : function (cfg) {
+ var i;
+
+ if (!JS.isObject(cfg)) {
+ return false;
+ }
+
+ if (cfg.prev) {
+ if (!JS.isArray(cfg.prev)) {
+ return false;
+ }
+ for (i in cfg.prev) {
+ if (cfg.prev.hasOwnProperty(i)) {
+ if (!JS.isString(cfg.prev[i].nodeName)) {
+ return false;
+ }
+ }
+ }
+ }
+
+ if (cfg.next) {
+ if (!JS.isArray(cfg.next)) {
+ return false;
+ }
+ for (i in cfg.next) {
+ if (cfg.next.hasOwnProperty(i)) {
+ if (!JS.isString(cfg.next[i].nodeName)) {
+ return false;
+ }
+ }
+ }
+ }
+
+ return true;
+ },
+
+ /**
+ * Validate the numItems value.
+ *
+ * @method _validateNumItems
+ * @param val {Number} The numItems value
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateNumItems: function (val) {
+ return JS.isNumber(val) && (val >= 0);
+ },
+
+ /**
+ * Validate the numVisible value.
+ *
+ * @method _validateNumVisible
+ * @param val {Number} The numVisible value
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateNumVisible: function (val) {
+ var rv = false;
+
+ if (JS.isNumber(val)) {
+ rv = val > 0 && val <= this.get("numItems");
+ }
+
+ return rv;
+ },
+
+ /**
+ * Validate the revealAmount value.
+ *
+ * @method _validateRevealAmount
+ * @param val {Number} The revealAmount value
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateRevealAmount: function (val) {
+ var rv = false;
+
+ if (JS.isNumber(val)) {
+ rv = val >= 0 && val < 100;
+ }
+
+ return rv;
+ },
+
+ /**
+ * Validate the scrollIncrement value.
+ *
+ * @method _validateScrollIncrement
+ * @param val {Number} The scrollIncrement value
+ * @return {Boolean} The status of the validation
+ * @protected
+ */
+ _validateScrollIncrement: function (val) {
+ var rv = false;
+
+ if (JS.isNumber(val)) {
+ rv = (val > 0 && val < this.get("numItems"));
+ }
+
+ return rv;
+ }
+
+ });
+
+})();
+/*
+;; Local variables: **
+;; mode: js2 **
+;; indent-tabs-mode: nil **
+;; End: **
+*/
+YAHOO.register("carousel", YAHOO.widget.Carousel, {version: "2.7.0", build: "1799"});
ToastFreeware / philipp / winterrodeln / wradmin.git / blobdiff