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kendo.menu.js
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import "./kendo.popup.js";
import "./kendo.data.js";
import "./kendo.icons.js";
export const __meta__ = {
id: "menu",
name: "Menu",
category: "web",
description: "The Menu widget displays hierarchical data as a multi-level menu.",
depends: [ "popup", "data", "data.odata" ]
};
(function($, undefined) {
var kendo = window.kendo,
ui = kendo.ui,
activeElement = kendo._activeElement,
touch = (kendo.support.touch && kendo.support.mobileOS),
isArray = Array.isArray,
HierarchicalDataSource = kendo.data.HierarchicalDataSource,
MOUSEDOWN = "mousedown",
CLICK = "click",
DELAY = 30,
SCROLLSPEED = 50,
extend = $.extend,
each = $.each,
encode = kendo.htmlEncode,
template = kendo.template,
keys = kendo.keys,
Widget = ui.Widget,
excludedNodesRegExp = /^(ul|a|div)$/i,
NS = ".kendoMenu",
IMG = "img",
OPEN = "open",
MENU = "k-menu",
LINK = "k-link k-menu-link",
LINK_SELECTOR = ".k-link",
ICON_SELECTOR = ".k-menu-expand-arrow",
LAST = "k-last",
CLOSE = "close",
TIMER = "timer",
FIRST = "k-first",
IMAGE = "k-image",
SELECT = "select",
ZINDEX = "zIndex",
ACTIVATE = "activate",
DEACTIVATE = "deactivate",
POINTERDOWN = "touchstart" + NS + " MSPointerDown" + NS + " pointerdown" + NS,
pointers = kendo.support.pointers,
msPointers = kendo.support.msPointers,
allPointers = msPointers || pointers,
CHANGE = "change",
ERROR = "error",
TOUCHSTART = kendo.support.touch ? "touchstart" : "",
MOUSEENTER = pointers ? "pointerover" : (msPointers ? "MSPointerOver" : "mouseenter"),
MOUSELEAVE = pointers ? "pointerout" : (msPointers ? "MSPointerOut" : "mouseleave"),
MOUSEWHEEL = "DOMMouseScroll" + NS + " mousewheel" + NS,
RESIZE = kendo.support.resize + NS,
SCROLLWIDTH = "scrollWidth",
SCROLLHEIGHT = "scrollHeight",
OFFSETWIDTH = "offsetWidth",
OFFSETHEIGHT = "offsetHeight",
POPUP_ID_ATTR = "group",
POPUP_OPENER_ATTR = "groupparent",
DOCUMENT_ELEMENT = $(document.documentElement),
KENDOPOPUP = "kendoPopup",
HOVERSTATE = "k-hover",
FOCUSEDSTATE = "k-focus",
DISABLEDSTATE = "k-disabled",
SELECTEDSTATE = "k-selected",
menuSelector = ".k-menu",
groupSelector = ".k-menu-group",
animationContainerSelector = ".k-animation-container",
childAnimationContainerSelector = ".k-child-animation-container",
popupSelector = ".k-menu-popup ," + animationContainerSelector,
allItemsSelector = ":not(.k-list) > .k-item:not([role='treeitem'])",
disabledSelector = ".k-item.k-disabled",
itemSelector = ".k-item",
availableItemsSelector = ".k-item:not(.k-disabled)",
linkSelector = ".k-item:not(.k-disabled) > .k-link",
exclusionSelector = ":not(.k-item.k-separator):visible",
templateSelector = "div:not(.k-animation-container,.k-list-container)",
scrollButtonSelector = ".k-menu-scroll-button",
touchPointerTypes = { "2": 1, "touch": 1 },
STRING = "string",
DATABOUND = "dataBound",
ARIA_EXPANDED = "aria-expanded",
ROLE = "role",
bindings = {
text: "dataTextField",
url: "dataUrlField",
spriteCssClass: "dataSpriteCssClassField",
icon: "dataIconField",
iconClass: "dataIconClassField",
imageUrl: "dataImageUrlField",
imageAttr: "dataImageAttrField",
content: "dataContentField"
},
rendering = {
wrapperCssClass: function(group, item) {
var result = "k-item k-menu-item",
index = item.index;
if (item.separator) {
result += " k-separator";
}
if (item.enabled === false) {
result += " k-disabled";
}
if (group.firstLevel && index === 0) {
result += " k-first";
}
if (index == group.length - 1) {
result += " k-last";
}
if (item.cssClass) {
result += " " + item.cssClass;
}
if (item.attr && item.attr.hasOwnProperty("class")) {
result += " " + item.attr["class"];
}
if (item.selected) {
result += " " + SELECTEDSTATE;
}
return result;
},
itemCssAttributes: function(item) {
var result = "";
var attributes = item.attr || {};
for (var attr in attributes) {
if (attributes.hasOwnProperty(attr) && attr !== "class") {
result += attr + "=\"" + attributes[attr] + "\" ";
}
}
return result;
},
imageCssAttributes: function(imgAttributes) {
var result = "";
var attributes = imgAttributes && imgAttributes.toJSON ? imgAttributes.toJSON() : {};
if (!attributes['class']) {
attributes['class'] = IMAGE;
} else {
attributes['class'] += " " + IMAGE;
}
for (var attr in attributes) {
if (attributes.hasOwnProperty(attr)) {
result += attr + "=\"" + attributes[attr] + "\" ";
}
}
return result;
},
contentCssAttributes: function(item) {
var result = "";
var attributes = item.contentAttr || {};
var defaultClasses = "k-content k-menu-group k-menu-group-md";
if (!attributes['class']) {
attributes['class'] = defaultClasses;
} else {
attributes['class'] += " " + defaultClasses;
}
for (var attr in attributes) {
if (attributes.hasOwnProperty(attr)) {
result += attr + "=\"" + attributes[attr] + "\" ";
}
}
return result;
},
textClass: function() {
return LINK;
},
groupAttributes: function(group) {
return group.expanded !== true ? `${kendo.attr("style-display")}="none"` : "";
},
groupCssClass: function() {
return "k-menu-group k-menu-group-md";
},
groupWrapperCssClass: function() {
return "k-menu-popup";
},
content: function(item) {
return item.content ? item.content : " ";
}
};
function getEffectDirection(direction, root) {
direction = direction.split(" ")[!root + 0] || direction;
return direction.replace("top", "up").replace("bottom", "down");
}
function parseDirection(direction, root, isRtl) {
direction = direction.split(" ")[!root + 0] || direction;
var output = { origin: ["bottom", (isRtl ? "right" : "left")], position: ["top", (isRtl ? "right" : "left")] },
horizontal = /left|right/.test(direction);
if (horizontal) {
output.origin = [ "top", direction ];
output.position[1] = kendo.directions[direction].reverse;
} else {
output.origin[0] = direction;
output.position[0] = kendo.directions[direction].reverse;
}
output.origin = output.origin.join(" ");
output.position = output.position.join(" ");
return output;
}
function contains(parent, child) {
try {
return $.contains(parent, child);
} catch (e) {
return false;
}
}
function updateItemClasses(item) {
item = $(item);
var omitWrap = item.attr(kendo.attr("omit-wrap"));
if (omitWrap) {
return;
}
item.addClass("k-item k-menu-item")
.children(IMG)
.addClass(IMAGE);
item
.children("a")
.addClass(LINK)
.children(IMG)
.addClass(IMAGE);
item
.filter(":not([disabled])");
item
.filter(".k-separator")
.removeClass("k-menu-item")
.addClass("k-separator-horizontal")
.empty()
.append(" ");
item
.filter("li[disabled]")
.addClass(DISABLEDSTATE)
.prop("disabled", false)
.attr("aria-disabled", true);
if (!item.filter("[role]").length) {
item.attr(ROLE, "menuitem");
}
if (!item.children(LINK_SELECTOR).length) {
item.contents() // exclude groups, real links, templates and empty text nodes
.filter(function() { return (!this.nodeName.match(excludedNodesRegExp) && !(this.nodeType === 3 && !kendo.trim(this.nodeValue))); })
// adding role=none to span elements inside li[role=menuitem]
// to make screen readers announce submenus #telerik/kendo-ui-core/issues/6942
.wrapAll("<span class='" + LINK + "' role='none'></span>")
.filter(function(idx, elm) { return elm.nodeType === 3; })
.wrap("<span class='k-menu-link-text' role='none'></span>");
}
updateArrow(item);
updateFirstLast(item);
}
function updateArrow(item) {
item = $(item);
item.find("> .k-link > .k-menu-expand-arrow > [class*=k-i-caret]:not(.k-sprite),> .k-link > .k-menu-expand-arrow > [class*=k-svg-i-caret]:not(.k-sprite)").parent().remove();
item.filter(":has(.k-menu-group)")
.children(".k-link:not(:has([class*=k-i-caret]:not(.k-sprite))),.k-link:not(:has([class*=k-svg-i-caret]:not(.k-sprite)))")
.each(function() {
var item = $(this);
item.append(`<span aria-hidden='true' class='k-menu-expand-arrow'>${kendo.ui.icon({ icon: getArrowIconName(item) })}</span>`);
});
}
function getArrowIconName(item) {
var arrowIconName,
parent = item.parent().parent(),
isRtl = kendo.support.isRtl(parent);
if (parent.hasClass(MENU + "-horizontal")) {
arrowIconName = "caret-alt-down";
} else {
if (isRtl) {
arrowIconName = "caret-alt-left";
}
else {
arrowIconName = "caret-alt-right";
}
}
return arrowIconName;
}
function updateFirstLast(item) {
item = $(item);
item.filter(".k-first:not(:first-child)").removeClass(FIRST);
item.filter(".k-last:not(:last-child)").removeClass(LAST);
item.filter(":first-child").addClass(FIRST);
item.filter(":last-child").addClass(LAST);
}
function updateHasAriaPopup(parents) {
if (parents && parents.length) {
for (var index in parents) {
var parentLi = parents.eq(index);
if (parentLi.find("ul").length) {
parentLi.attr("aria-haspopup", true);
} else {
parentLi.removeAttr("aria-haspopup");
}
}
}
}
function getParentLiItems(group) {
if (!group.hasClass(MENU)) {
return group.parentsUntil("." + MENU, "li");
}
}
function storeItemSelectEventHandler(element, options) {
var selectHandler = getItemSelectEventHandler(options);
if (selectHandler) {
setItemData(element, selectHandler);
}
if (options.items) {
$(element).children("div").children("ul").children("li").each(function(i) {
storeItemSelectEventHandler(this, options.items[i]);
});
}
}
function setItemData(element, selectHandler) {
$(element).children(".k-link").data({
selectHandler: selectHandler
});
}
function getItemSelectEventHandler(options) {
var selectHandler = options.select,
isFunction = kendo.isFunction;
if (selectHandler && isFunction(selectHandler)) {
return selectHandler;
}
return null;
}
function popupOpenerSelector(id) {
return id ? "li[data-groupparent='" + id + "']" : "li[data-groupparent]";
}
function popupGroupSelector(id) {
var selector = id ? "[data-group='" + id + "']" : "[data-group]";
return "ul" + selector + ",div" + selector;
}
function getChildPopups(currentPopup, overflowWrapper) {
var childPopupOpener = currentPopup.find(popupOpenerSelector());
var result = [];
childPopupOpener.each(function(i, opener) {
opener = $(opener);
var popupId = opener.data(POPUP_OPENER_ATTR);
var popup = currentPopup;
while (popupId) {
popup = overflowWrapper.find(popupGroupSelector(popupId) + ":visible");
if (popup.length) {
result.push(popup);
}
opener = popup.find(popupOpenerSelector());
popupId = opener.data(POPUP_OPENER_ATTR);
}
});
return result;
}
function popupParentItem(popupElement, overflowWrapper) {
var popupId = popupElement.data(POPUP_ID_ATTR);
return popupId ? overflowWrapper.find(popupOpenerSelector(popupId)) : $([]);
}
function itemPopup(item, overflowWrapper) {
var popupId = item.data(POPUP_OPENER_ATTR);
return popupId ? overflowWrapper.children(animationContainerSelector).find(popupGroupSelector(popupId)) : $([]);
}
function overflowMenuParents(current, overflowWrapper) {
var parents = [];
var getParents = function(item) {
while (item.parentNode && !overflowWrapper.is(item.parentNode)) {
parents.push(item.parentNode);
item = item.parentNode;
}
};
var elem = current[0] || current;
getParents(elem);
var last = parents[parents.length - 1];
while ($(last).is(animationContainerSelector)) {
var popupElement = $(last).find(popupSelector);
elem = popupParentItem(popupElement, overflowWrapper)[0];
if (!elem) {
break;
}
parents.push(elem);
getParents(elem);
last = parents[parents.length - 1];
}
return parents;
}
function mousewheelDelta(e) {
var delta = 0;
if (e.wheelDelta) {
delta = -e.wheelDelta / 120;
delta = delta > 0 ? Math.ceil(delta) : Math.floor(delta);
}
if (e.detail) {
delta = Math.round(e.detail / 3);
}
return delta;
}
function parentsScroll(current, scrollDirection) {
var scroll = 0;
var parent = current.parentNode;
while (parent && !isNaN(parent[scrollDirection])) {
scroll += parent[scrollDirection];
parent = parent.parentNode;
}
return scroll;
}
function isPointerTouch(e) {
return allPointers && e.originalEvent && e.originalEvent.pointerType in touchPointerTypes;
}
function isTouch(e) {
var ev = e.originalEvent;
return touch && /touch/i.test(ev.type || "");
}
function removeSpacesBetweenItems(ul) {
ul.contents().filter(function() { return this.nodeName != "LI"; }).remove();
}
var Menu = kendo.ui.DataBoundWidget.extend({
init: function(element, options) {
var that = this;
Widget.fn.init.call(that, element, options);
element = that.wrapper = that.element;
options = that.options;
that._accessors();
that._templates();
that._dataSource();
that._updateClasses();
that._wrapGroups();
that._animations(options);
that.nextItemZIndex = 100;
that._tabindex();
that._initOverflow(options);
that._attachMenuEventsHandlers();
if (options.openOnClick) {
that.clicked = false;
}
element.attr(ROLE, "menubar");
if (element[0].id) {
that._ariaId = kendo.format("{0}_mn_active", element[0].id);
} else {
that._ariaId = kendo.format("{0}_mn_active", kendo.guid());
}
kendo.notify(that);
},
events: [
OPEN,
CLOSE,
ACTIVATE,
DEACTIVATE,
SELECT,
DATABOUND
],
options: {
name: "Menu",
animation: {
open: {
duration: 200
},
close: { // if close animation effects are defined, they will be used instead of open.reverse
duration: 100
}
},
orientation: "horizontal",
direction: "default",
openOnClick: false,
closeOnClick: true,
hoverDelay: 100,
scrollable: false,
popupCollision: null,
autoSize: false,
iconPosition: "before", // "before" or "after" text content
},
_initData: function() {
var that = this;
if (that.dataSource) {
that.element.empty();
that.append(that.dataSource.view(), that.element);
}
},
_attachMenuEventsHandlers: function() {
var that = this;
var element = that.element;
var options = that.options;
var overflowWrapper = that._overflowWrapper();
that._checkActiveProxy = that._checkActiveElement.bind(that);
(overflowWrapper || element).on(POINTERDOWN, itemSelector, that._focusHandler.bind(that))
.on(CLICK + NS, disabledSelector, false)
.on(CLICK + NS, itemSelector, that._click.bind(that))
.on(POINTERDOWN + " " + MOUSEDOWN + NS, ".k-content", that._preventClose.bind(that))
.on(MOUSEENTER + NS, availableItemsSelector, that._mouseenter.bind(that))
.on(MOUSELEAVE + NS, availableItemsSelector, that._mouseleave.bind(that))
.on(MOUSEDOWN + NS, availableItemsSelector, that._mousedown.bind(that))
.on(TOUCHSTART + NS + " " + MOUSEENTER + NS + " " + MOUSELEAVE + NS + " " +
MOUSEDOWN + NS + " " + CLICK + NS, linkSelector, that._toggleHover.bind(that));
element.on("keydown" + NS, that._keydown.bind(that))
.on("focus" + NS, that._focus.bind(that))
.on("focus" + NS, ".k-content", that._focus.bind(that))
.on("blur" + NS, that._removeFocusItem.bind(that))
.on("blur" + NS, "[tabindex]", that._checkActiveProxy);
if (overflowWrapper) {
overflowWrapper
.on(MOUSELEAVE + NS, popupSelector, that._mouseleavePopup.bind(that))
.on(MOUSEENTER + NS, popupSelector, that._mouseenterPopup.bind(that));
}
if (options.openOnClick) {
that._documentClickHandler = that._documentClick.bind(that);
$(document).on("click", that._documentClickHandler);
}
},
_detachMenuEventsHandlers: function() {
var that = this;
var overflowWrapper = that._overflowWrapper();
if (overflowWrapper) {
overflowWrapper.off(NS);
}
that.element.off(NS);
if (that._documentClickHandler) {
$(document).off("click", that._documentClickHandler);
}
},
_getNeededSpaceForChildren: function(element, horizontal) {
const children = element.children();
let total = 0;
if (children.length > 0) {
children.each((_, element) => {
if (horizontal) {
total += kendo._outerWidth(element);
} else {
total += kendo._outerHeight(element);
}
});
}
return total;
},
_initOverflow: function(options) {
var that = this;
var isHorizontal = options.orientation == "horizontal";
var backwardBtn, forwardBtn;
const isRtl = kendo.support.isRtl(that.wrapper);
that._openedPopups = {};
if (options.scrollable) {
that._scrollWrapper = that.element.wrap(`<div class="k-menu-scroll-wrapper${options.orientation === 'vertical' ? " k-menu-scroll-wrapper-vertical" : ""}"></div>`).parent();
if (isHorizontal) {
removeSpacesBetweenItems(that.element);
}
let backwardBtnIcon = isHorizontal ? (isRtl ? 'right' : 'left') : 'up';
let forwardBtnIcon = isHorizontal ? (isRtl ? 'left' : 'right') : 'down';
backwardBtn = $(that.templates.scrollButton({ direction: backwardBtnIcon }));
forwardBtn = $(that.templates.scrollButton({ direction: forwardBtnIcon }));
switch (options.scrollable.scrollButtonsPosition) {
case "start":
forwardBtn.prependTo(that._scrollWrapper);
backwardBtn.prependTo(that._scrollWrapper);
break;
case "end":
backwardBtn.appendTo(that._scrollWrapper);
forwardBtn.appendTo(that._scrollWrapper);
break;
default:
backwardBtn.prependTo(that._scrollWrapper);
forwardBtn.appendTo(that._scrollWrapper);
}
that._initScrolling(that.element, backwardBtn, forwardBtn, isHorizontal, isRtl);
var initialWidth = that.element.outerWidth();
var initialCssWidth = that.element[0].style.width;
initialCssWidth = initialCssWidth === "auto" ? "" : initialCssWidth;
if (isHorizontal) {
$(window).on(RESIZE, function() {
setTimeout(function() {
that._setOverflowWrapperWidth(initialWidth, initialCssWidth);
that._toggleScrollButtons(that.element, backwardBtn, forwardBtn, isHorizontal);
}, 300);
});
}
that._setOverflowWrapperWidth(initialWidth, initialCssWidth);
that._toggleScrollButtons(that.element, backwardBtn, forwardBtn, isHorizontal);
}
},
_overflowWrapper: function() {
return this._scrollWrapper || this._popupsWrapper;
},
_setOverflowWrapperWidth: function(initialWidth, initialCssWidth) {
var that = this;
var wrapperCssWidth = that._scrollWrapper.css("width");
that._scrollWrapper.css({ width: "" });
var wrapperWidth = that._scrollWrapper.outerWidth();
that._scrollWrapper.css({ width: wrapperCssWidth });
var menuWidth = that.element.outerWidth();
var borders = that.element[0].offsetWidth - that.element[0].clientWidth;
if (menuWidth != wrapperWidth && wrapperWidth > 0) {
var width = initialCssWidth ? Math.min(initialWidth, wrapperWidth) : wrapperWidth;
that.element.width(width - borders);
that._scrollWrapper.width(width);
}
},
_reinitOverflow: function(options) {
var that = this;
var overflowChanged = ((options.scrollable && !that.options.scrollable) || (!options.scrollable && that.options.scrollable)) ||
(options.scrollable && that.options.scrollable && (
options.scrollable.distance != that.options.scrollable.distance ||
options.scrollable.scrollButtonsPosition != that.options.scrollable.scrollButtonsPosition
)) ||
options.orientation != that.options.orientation;
if (overflowChanged) {
that._detachMenuEventsHandlers();
that._destroyOverflow();
that._initOverflow(options);
that._attachMenuEventsHandlers();
}
},
_destroyOverflow: function() {
var that = this;
var overflowWrapper = that._overflowWrapper();
if (overflowWrapper) {
overflowWrapper.off(NS);
overflowWrapper.find(scrollButtonSelector).off(NS).remove();
overflowWrapper.children(animationContainerSelector).each(function(i, popupWrapper) {
var ul = $(popupWrapper).find(".k-child-animation-container > .k-menu-popup");
ul.off(MOUSEWHEEL);
var popupParentLi = popupParentItem(ul, overflowWrapper);
if (popupParentLi.length) {
popupParentLi.append(popupWrapper);
}
});
overflowWrapper.find(popupOpenerSelector()).removeAttr("data-groupparent");
overflowWrapper.find(popupGroupSelector()).removeAttr("data-group");
that.element.off(MOUSEWHEEL);
$(window).off(RESIZE);
overflowWrapper.contents().unwrap();
that._scrollWrapper = that._popupsWrapper = that._openedPopups = undefined;
}
},
_initScrolling: function(scrollElement, backwardBtn, forwardBtn, isHorizontal, isRtl) {
var that = this;
var scrollable = that.options.scrollable;
var distance = that.isNumeric(scrollable.distance) ? scrollable.distance : SCROLLSPEED;
var mouseWheelDistance = distance / 2;
var backward = "-=" + distance;
var forward = "+=" + distance;
var backwardDouble = "-=" + distance * 2;
var forwardDouble = "+=" + distance * 2;
var scrolling = false;
var touchEvents = false;
var scroll = function(value) {
var scrollValue = isHorizontal ? { "scrollLeft": value } : { "scrollTop": value };
scrollElement.finish().animate(scrollValue, "fast", "linear", function() {
if (scrolling) {
scroll(value);
}
});
that._toggleScrollButtons(scrollElement, backwardBtn, forwardBtn, isHorizontal, isRtl);
};
var mouseenterHandler = function(e) {
if (!scrolling && !touchEvents) {
scroll(e.data.direction);
scrolling = true;
}
};
var mousedownHandler = function(e) {
var scrollValue = isHorizontal ? { "scrollLeft": e.data.direction } : { "scrollTop": e.data.direction };
touchEvents = isTouch(e) || isPointerTouch(e);
scrollElement.stop().animate(scrollValue, "fast", "linear", function() {
if (!touchEvents) {
$(e.currentTarget).trigger(MOUSEENTER);
} else {
that._toggleScrollButtons(scrollElement, backwardBtn, forwardBtn, isHorizontal, isRtl);
scrolling = true;
}
});
scrolling = false;
e.stopPropagation();
e.preventDefault();
};
backwardBtn.on(MOUSEENTER + NS, { direction: isRtl && isHorizontal ? forward : backward }, mouseenterHandler)
.on(kendo.eventMap.down + NS, { direction: isRtl && isHorizontal ? forwardDouble : backwardDouble }, mousedownHandler);
forwardBtn.on(MOUSEENTER + NS, { direction: isRtl && isHorizontal ? backward : forward }, mouseenterHandler)
.on(kendo.eventMap.down + NS, { direction: isRtl && isHorizontal ? backwardDouble : forwardDouble }, mousedownHandler);
backwardBtn.add(forwardBtn)
.on(MOUSELEAVE + NS, function() {
scrollElement.stop();
scrolling = false;
that._toggleScrollButtons(scrollElement, backwardBtn, forwardBtn, isHorizontal, isRtl);
});
scrollElement.on(MOUSEWHEEL, function(e) {
if (!e.ctrlKey && !e.shiftKey && !e.altKey) {
var wheelDelta = mousewheelDelta(e.originalEvent);
var scrollSpeed = Math.abs(wheelDelta) * mouseWheelDistance;
var value = (wheelDelta > 0 ? "+=" : "-=") + scrollSpeed;
var scrollValue = isHorizontal ? { "scrollLeft": value } : { "scrollTop": value };
that._closeChildPopups(scrollElement);
scrollElement.finish().animate(scrollValue, "fast", "linear", function() {
that._toggleScrollButtons(scrollElement, backwardBtn, forwardBtn, isHorizontal);
});
e.preventDefault();
}
});
},
isNumeric: function(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
},
_toggleScrollButtons: function(scrollElement, backwardBtn, forwardBtn, horizontal) {
const neededSpace = this._getNeededSpaceForChildren(scrollElement, horizontal);
const elementSpace = horizontal ? kendo._outerWidth(this.element) : kendo._outerHeight(this.element);
backwardBtn.toggle(neededSpace > elementSpace);
forwardBtn.toggle(neededSpace > elementSpace);
const currentScroll = horizontal ? kendo.scrollLeft(scrollElement) : scrollElement.scrollTop();
const elementIsPopup = scrollElement.is(popupSelector) || scrollElement.parent().is(childAnimationContainerSelector);
let disableNextButton = Math.abs(currentScroll - (scrollElement[0].scrollWidth - scrollElement[0].offsetWidth)) <= 1;
if (!horizontal) {
disableNextButton = Math.abs(currentScroll - (scrollElement[0].scrollHeight - scrollElement[0].offsetHeight)) <= 1;
}
if (elementIsPopup) {
disableNextButton = Math.abs(currentScroll - (scrollElement[0].scrollHeight - scrollElement[0].offsetHeight) - 1) <= 1;
}
backwardBtn.toggleClass(DISABLEDSTATE, Math.floor(currentScroll) === 0);
forwardBtn.toggleClass(DISABLEDSTATE, disableNextButton);
},
setOptions: function(options) {
var animation = this.options.animation;
this._animations(options);
options.animation = extend(true, animation, options.animation);
if ("dataSource" in options) {
this._dataSource(options);
}
this._updateClasses();
this._wrapGroups();
this._reinitOverflow(options);
Widget.fn.setOptions.call(this, options);
},
destroy: function() {
var that = this;
Widget.fn.destroy.call(that);
that._detachMenuEventsHandlers();
that._destroyOverflow();
kendo.destroy(that.element);
},
enable: function(element, enable) {
this._toggleDisabled(element, enable !== false);
return this;
},
disable: function(element) {
this._toggleDisabled(element, false);
return this;
},
attemptGetItem: function(candidate) {
candidate = candidate || this.element;
var item = this.element.find(candidate);
var overflowWrapper = this._overflowWrapper();
if (item.length || candidate === this.element) {
return item;
} else if (overflowWrapper) {
return overflowWrapper.find(candidate);
} else {
return $();
}
},
append: function(item, referenceItem) {
referenceItem = this.attemptGetItem(referenceItem);
var inserted = this._insert(item, referenceItem, referenceItem.length ? this._childPopupElement(referenceItem).children().eq(0) : null);
each(inserted.items, function(i) {
inserted.group.append(this);
updateArrow(this);
storeItemSelectEventHandler(this, item[i] || item);
});
updateArrow(referenceItem);
updateFirstLast(inserted.group.find(".k-first, .k-last").add(inserted.items));
updateHasAriaPopup(getParentLiItems(inserted.group));
return this;
},
insertBefore: function(item, referenceItem) {
referenceItem = this.attemptGetItem(referenceItem);
var inserted = this._insert(item, referenceItem, referenceItem.parent());
each(inserted.items, function(i) {
referenceItem.before(this);
updateArrow(this);
updateFirstLast(this);
storeItemSelectEventHandler(this, item[i] || item);
});
updateFirstLast(referenceItem);
return this;
},
insertAfter: function(item, referenceItem) {
referenceItem = this.attemptGetItem(referenceItem);
var inserted = this._insert(item, referenceItem, referenceItem.parent());
each(inserted.items, function(i) {
referenceItem.after(this);
updateArrow(this);
updateFirstLast(this);
storeItemSelectEventHandler(this, item[i] || item);
});
updateFirstLast(referenceItem);
return this;
},
_insert: function(item, referenceItem, parent) {
var that = this,
items, groups;
if (!referenceItem || !referenceItem.length) {
parent = that.element;
}
var plain = $.isPlainObject(item) || item instanceof kendo.data.ObservableObject,
groupData = {
firstLevel: parent.hasClass(MENU),
horizontal: parent.hasClass(MENU + "-horizontal"),
expanded: true,
length: parent.children().length
};
if (referenceItem && !parent.length) {
parent = $(that.renderGroup({ group: groupData, options: that.options })).css("display", "none").appendTo(referenceItem);
kendo.applyStylesFromKendoAttributes(parent, ["display"]);
}
if (plain || isArray(item) || item instanceof kendo.data.ObservableArray) { // is JSON
items = $($.map(plain ? [ item ] : item, function(value, idx) {
if (typeof value === "string") {
return $(value).get();
} else {
let itemElement = $(that.renderItem({
group: groupData,
item: extend(value, { index: idx })
}));
kendo.applyStylesFromKendoAttributes(itemElement, ["display"]);
return itemElement.get();
}
}));
} else {
if (typeof item == "string" && item.charAt(0) != "<") {
items = that.element.find(item);
} else {
items = $(item);
}
groups = items.find("> ul")
.addClass("k-menu-group k-menu-group-md")
.attr(ROLE, "menu");
items = items.filter("li");