import * as tslib_1 from "tslib";
import * as React from 'react';
import { ContextualMenuItemType } from './ContextualMenu.types';
import { DirectionalHint } from '../../common/DirectionalHint';
import { FocusZone, FocusZoneDirection, FocusZoneTabbableElements } from '../../FocusZone';
import { divProperties, getNativeProps, shallowCompare } from '../../Utilities';
import { assign, BaseComponent, classNamesFunction, css, getDocument, getFirstFocusable, getId, getLastFocusable, getRTL, getWindow, KeyCodes, shouldWrapFocus, isIOS, isMac } from '../../Utilities';
import { hasSubmenu, getIsChecked, isItemDisabled } from '../../utilities/contextualMenu/index';
import { withResponsiveMode, ResponsiveMode } from '../../utilities/decorators/withResponsiveMode';
import { Callout } from '../../Callout';
import { ContextualMenuItem } from './ContextualMenuItem';
import { ContextualMenuSplitButton, ContextualMenuButton, ContextualMenuAnchor } from './ContextualMenuItemWrapper/index';
import { mergeStyleSets } from '../../Styling';
import { getItemStyles } from './ContextualMenu.classNames';
var getClassNames = classNamesFunction({
    disableCaching: true
});
var getContextualMenuItemClassNames = classNamesFunction({
    disableCaching: true
});
export function getSubmenuItems(item) {
    return item.subMenuProps ? item.subMenuProps.items : item.items;
}
/**
 * Returns true if a list of menu items can contain a checkbox
 */
export function canAnyMenuItemsCheck(items) {
    return items.some(function (item) {
        if (item.canCheck) {
            return true;
        }
        // If the item is a section, check if any of the items in the section can check.
        if (item.sectionProps && item.sectionProps.items.some(function (submenuItem) { return submenuItem.canCheck === true; })) {
            return true;
        }
        return false;
    });
}
var NavigationIdleDelay = 250 /* ms */;
var ContextualMenuBase = /** @class */ (function (_super) {
    tslib_1.__extends(ContextualMenuBase, _super);
    function ContextualMenuBase(props) {
        var _this = _super.call(this, props) || this;
        _this._mounted = false;
        _this.dismiss = function (ev, dismissAll) {
            var onDismiss = _this.props.onDismiss;
            if (onDismiss) {
                onDismiss(ev, dismissAll);
            }
        };
        _this._onRenderMenuList = function (menuListProps, defaultRender) {
            var indexCorrection = 0;
            return (React.createElement("ul", { className: _this._classNames.list, onKeyDown: _this._onKeyDown, onKeyUp: _this._onKeyUp, role: "menu" }, menuListProps.items.map(function (item, index) {
                var menuItem = _this._renderMenuItem(item, index, indexCorrection, menuListProps.totalItemCount, menuListProps.hasCheckmarks, menuListProps.hasIcons);
                if (item.itemType !== ContextualMenuItemType.Divider && item.itemType !== ContextualMenuItemType.Header) {
                    var indexIncrease = item.customOnRenderListLength ? item.customOnRenderListLength : 1;
                    indexCorrection += indexIncrease;
                }
                return menuItem;
            })));
        };
        _this._onKeyDown = function (ev) {
            // Take note if we are processing an alt (option) or meta (command) keydown.
            // See comment in _shouldHandleKeyUp for reasoning.
            _this._lastKeyDownWasAltOrMeta = _this._isAltOrMeta(ev);
            // On Mac, pressing escape dismisses all levels of native context menus
            var dismissAllMenus = ev.which === KeyCodes.escape && (isMac() || isIOS());
            return _this._keyHandler(ev, _this._shouldHandleKeyDown, dismissAllMenus);
        };
        _this._shouldHandleKeyDown = function (ev) {
            return ev.which === KeyCodes.escape || _this._shouldCloseSubMenu(ev) || (ev.which === KeyCodes.up && (ev.altKey || ev.metaKey));
        };
        _this._onMenuFocusCapture = function (ev) {
            if (_this.props.delayUpdateFocusOnHover) {
                _this._shouldUpdateFocusOnMouseEvent = true;
            }
        };
        _this._onKeyUp = function (ev) {
            return _this._keyHandler(ev, _this._shouldHandleKeyUp, true /* dismissAllMenus */);
        };
        /**
         * We close the menu on key up only if ALL of the following are true:
         * - Most recent key down was alt or meta (command)
         * - The alt/meta key down was NOT followed by some other key (such as down/up arrow to
         *   expand/collapse the menu)
         * - We're not on a Mac (or iOS)
         *
         * This is because on Windows, pressing alt moves focus to the application menu bar or similar,
         * closing any open context menus. There is not a similar behavior on Macs.
         */
        _this._shouldHandleKeyUp = function (ev) {
            var keyPressIsAltOrMetaAlone = _this._lastKeyDownWasAltOrMeta && _this._isAltOrMeta(ev);
            _this._lastKeyDownWasAltOrMeta = false;
            return !!keyPressIsAltOrMetaAlone && !(isIOS() || isMac());
        };
        /**
         * Calls `shouldHandleKey` to determine whether the keyboard event should be handled;
         * if so, stops event propagation and dismisses menu(s).
         * @param ev - The keyboard event.
         * @param shouldHandleKey - Returns whether we should handle this keyboard event.
         * @param dismissAllMenus - If true, dismiss all menus. Otherwise, dismiss only the current menu.
         * Only does anything if `shouldHandleKey` returns true.
         * @returns Whether the event was handled.
         */
        _this._keyHandler = function (ev, shouldHandleKey, dismissAllMenus) {
            var handled = false;
            if (shouldHandleKey(ev)) {
                _this._isFocusingPreviousElement = true;
                ev.preventDefault();
                ev.stopPropagation();
                _this.dismiss(ev, dismissAllMenus);
                handled = true;
            }
            return handled;
        };
        /**
         * Checks if the submenu should be closed
         */
        _this._shouldCloseSubMenu = function (ev) {
            var submenuCloseKey = getRTL() ? KeyCodes.right : KeyCodes.left;
            if (ev.which !== submenuCloseKey || !_this.props.isSubMenu) {
                return false;
            }
            return (_this._adjustedFocusZoneProps.direction === FocusZoneDirection.vertical ||
                (!!_this._adjustedFocusZoneProps.checkForNoWrap && !shouldWrapFocus(ev.target, 'data-no-horizontal-wrap')));
        };
        _this._onMenuKeyDown = function (ev) {
            // Mark as handled if onKeyDown returns true (for handling collapse cases)
            // or if we are attempting to expand a submenu
            var handled = _this._onKeyDown(ev);
            if (handled || !_this._host) {
                return;
            }
            // If we have a modifier key being pressed, we do not want to move focus.
            // Otherwise, handle up and down keys.
            var hasModifier = !!(ev.altKey || ev.metaKey);
            var isUp = ev.which === KeyCodes.up;
            var isDown = ev.which === KeyCodes.down;
            if (!hasModifier && (isUp || isDown)) {
                var elementToFocus = isUp
                    ? getLastFocusable(_this._host, _this._host.lastChild, true)
                    : getFirstFocusable(_this._host, _this._host.firstChild, true);
                if (elementToFocus) {
                    elementToFocus.focus();
                    ev.preventDefault();
                    ev.stopPropagation();
                }
            }
        };
        /**
         * Scroll handler for the callout to make sure the mouse events
         * for updating focus are not interacting during scroll
         */
        _this._onScroll = function () {
            if (!_this._isScrollIdle && _this._scrollIdleTimeoutId !== undefined) {
                _this._async.clearTimeout(_this._scrollIdleTimeoutId);
                _this._scrollIdleTimeoutId = undefined;
            }
            else {
                _this._isScrollIdle = false;
            }
            _this._scrollIdleTimeoutId = _this._async.setTimeout(function () {
                _this._isScrollIdle = true;
            }, NavigationIdleDelay);
        };
        _this._onItemMouseEnterBase = function (item, ev, target) {
            if (_this._shouldIgnoreMouseEvent()) {
                return;
            }
            _this._updateFocusOnMouseEvent(item, ev, target);
        };
        _this._onItemMouseMoveBase = function (item, ev, target) {
            var targetElement = ev.currentTarget;
            // Always do this check to make sure we record a mouseMove if needed (even if we are timed out)
            if (_this._shouldUpdateFocusOnMouseEvent) {
                _this._gotMouseMove = true;
            }
            else {
                return;
            }
            if (!_this._isScrollIdle ||
                _this._enterTimerId !== undefined ||
                targetElement === _this._targetWindow.document.activeElement) {
                return;
            }
            _this._updateFocusOnMouseEvent(item, ev, target);
        };
        _this._onMouseItemLeave = function (item, ev) {
            if (_this._shouldIgnoreMouseEvent()) {
                return;
            }
            if (_this._enterTimerId !== undefined) {
                _this._async.clearTimeout(_this._enterTimerId);
                _this._enterTimerId = undefined;
            }
            if (_this.state.expandedMenuItemKey !== undefined) {
                return;
            }
            /**
             * IE11 focus() method forces parents to scroll to top of element.
             * Edge and IE expose a setActive() function for focusable divs that
             * sets the page focus but does not scroll the parent element.
             */
            if (_this._host.setActive) {
                try {
                    _this._host.setActive();
                }
                catch (e) {
                    /* no-op */
                }
            }
            else {
                _this._host.focus();
            }
        };
        _this._onItemMouseDown = function (item, ev) {
            if (item.onMouseDown) {
                item.onMouseDown(item, ev);
            }
        };
        _this._onItemClick = function (item, ev) {
            _this._onItemClickBase(item, ev, ev.currentTarget);
        };
        _this._onItemClickBase = function (item, ev, target) {
            var items = getSubmenuItems(item);
            // Cancel a async menu item hover timeout action from being taken and instead
            // just trigger the click event instead.
            _this._cancelSubMenuTimer();
            if (!hasSubmenu(item) && (!items || !items.length)) {
                // This is an item without a menu. Click it.
                _this._executeItemClick(item, ev);
            }
            else {
                if (item.key !== _this.state.expandedMenuItemKey) {
                    // This has a collapsed sub menu. Expand it.
                    _this.setState({
                        // When Edge + Narrator are used together (regardless of if the button is in a form or not), pressing
                        // "Enter" fires this method and not _onMenuKeyDown. Checking ev.nativeEvent.detail differentiates
                        // between a real click event and a keypress event (detail should be the number of mouse clicks).
                        // ...Plot twist! For a real click event in IE 11, detail is always 0 (Edge sets it properly to 1).
                        // So we also check the pointerType property, which both Edge and IE set to "mouse" for real clicks
                        // and "" for pressing "Enter" with Narrator on.
                        expandedByMouseClick: ev.nativeEvent.detail !== 0 || ev.nativeEvent.pointerType === 'mouse'
                    });
                    _this._onItemSubMenuExpand(item, target);
                }
            }
            ev.stopPropagation();
            ev.preventDefault();
        };
        _this._onAnchorClick = function (item, ev) {
            _this._executeItemClick(item, ev);
            ev.stopPropagation();
        };
        _this._executeItemClick = function (item, ev) {
            if (item.disabled || item.isDisabled) {
                return;
            }
            var dismiss = false;
            if (item.onClick) {
                dismiss = !!item.onClick(ev, item);
            }
            else if (_this.props.onItemClick) {
                dismiss = !!_this.props.onItemClick(ev, item);
            }
            (dismiss || !ev.defaultPrevented) && _this.dismiss(ev, true);
        };
        _this._onItemKeyDown = function (item, ev) {
            var openKey = getRTL() ? KeyCodes.left : KeyCodes.right;
            if (!item.disabled &&
                (ev.which === openKey || ev.which === KeyCodes.enter || (ev.which === KeyCodes.down && (ev.altKey || ev.metaKey)))) {
                _this.setState({
                    expandedByMouseClick: false
                });
                _this._onItemSubMenuExpand(item, ev.currentTarget);
                ev.preventDefault();
            }
        };
        // Cancel a async menu item hover timeout action from being taken and instead
        // do new upcoming behavior
        _this._cancelSubMenuTimer = function () {
            if (_this._enterTimerId !== undefined) {
                _this._async.clearTimeout(_this._enterTimerId);
                _this._enterTimerId = undefined;
            }
        };
        _this._onItemSubMenuExpand = function (item, target) {
            if (_this.state.expandedMenuItemKey !== item.key) {
                if (_this.state.expandedMenuItemKey) {
                    _this._onSubMenuDismiss();
                }
                // Focus the target to ensure when we close it, we're focusing on the correct element.
                target.focus();
                _this.setState({
                    expandedMenuItemKey: item.key,
                    submenuTarget: target
                });
            }
        };
        /**
         * This function is called ASYNCHRONOUSLY, and so there is a chance it is called
         * after the component is unmounted. The _mounted property is added to prevent
         * from calling setState() after unmount. Do NOT copy this pattern in synchronous
         * code.
         */
        _this._onSubMenuDismiss = function (ev, dismissAll) {
            if (dismissAll) {
                _this.dismiss(ev, dismissAll);
            }
            else if (_this._mounted) {
                _this.setState({
                    dismissedMenuItemKey: _this.state.expandedMenuItemKey,
                    expandedMenuItemKey: undefined,
                    submenuTarget: undefined
                });
            }
        };
        _this._getSubMenuId = function (item) {
            var subMenuId = _this.state.subMenuId;
            if (item.subMenuProps && item.subMenuProps.id) {
                subMenuId = item.subMenuProps.id;
            }
            return subMenuId;
        };
        _this._onPointerAndTouchEvent = function (ev) {
            _this._cancelSubMenuTimer();
        };
        _this.state = {
            contextualMenuItems: undefined,
            subMenuId: getId('ContextualMenu')
        };
        _this._warnDeprecations({
            getMenuClassNames: 'styles'
        });
        _this._isFocusingPreviousElement = false;
        _this._isScrollIdle = true;
        _this._shouldUpdateFocusOnMouseEvent = !_this.props.delayUpdateFocusOnHover;
        _this._gotMouseMove = false;
        return _this;
    }
    ContextualMenuBase.prototype.shouldComponentUpdate = function (newProps, newState) {
        if (!newProps.shouldUpdateWhenHidden && this.props.hidden && newProps.hidden) {
            // Do not update when hidden.
            return false;
        }
        return !shallowCompare(this.props, newProps) || !shallowCompare(this.state, newState);
    };
    // tslint:disable-next-line function-name
    ContextualMenuBase.prototype.UNSAFE_componentWillUpdate = function (newProps) {
        if (newProps.target !== this.props.target) {
            var newTarget = newProps.target;
            this._setTargetWindowAndElement(newTarget);
        }
        if (this._isHidden(newProps) !== this._isHidden(this.props)) {
            if (this._isHidden(newProps)) {
                this._onMenuClosed();
            }
            else {
                this._onMenuOpened();
                this._previousActiveElement = this._targetWindow ? this._targetWindow.document.activeElement : null;
            }
        }
        if (newProps.delayUpdateFocusOnHover !== this.props.delayUpdateFocusOnHover) {
            // update shouldUpdateFocusOnMouseEvent to follow what was passed in
            this._shouldUpdateFocusOnMouseEvent = !newProps.delayUpdateFocusOnHover;
            // If shouldUpdateFocusOnMouseEvent is false, we need to reset gotMouseMove to false
            this._gotMouseMove = this._shouldUpdateFocusOnMouseEvent && this._gotMouseMove;
        }
    };
    // Invoked once, both on the client and server, immediately before the initial rendering occurs.
    // tslint:disable-next-line function-name
    ContextualMenuBase.prototype.UNSAFE_componentWillMount = function () {
        var target = this.props.target;
        this._setTargetWindowAndElement(target);
        if (!this.props.hidden) {
            this._previousActiveElement = this._targetWindow ? this._targetWindow.document.activeElement : null;
        }
    };
    // Invoked once, only on the client (not on the server), immediately after the initial rendering occurs.
    ContextualMenuBase.prototype.componentDidMount = function () {
        if (!this.props.hidden) {
            this._onMenuOpened();
        }
        this._mounted = true;
    };
    // Invoked immediately before a component is unmounted from the DOM.
    ContextualMenuBase.prototype.componentWillUnmount = function () {
        this._tryFocusPreviousActiveElement();
        if (this.props.onMenuDismissed) {
            this.props.onMenuDismissed(this.props);
        }
        this._events.dispose();
        this._async.dispose();
        this._mounted = false;
    };
    ContextualMenuBase.prototype.render = function () {
        var _this = this;
        var isBeakVisible = this.props.isBeakVisible;
        var _a = this.props, items = _a.items, labelElementId = _a.labelElementId, id = _a.id, className = _a.className, beakWidth = _a.beakWidth, directionalHint = _a.directionalHint, directionalHintForRTL = _a.directionalHintForRTL, alignTargetEdge = _a.alignTargetEdge, gapSpace = _a.gapSpace, coverTarget = _a.coverTarget, ariaLabel = _a.ariaLabel, doNotLayer = _a.doNotLayer, target = _a.target, bounds = _a.bounds, useTargetWidth = _a.useTargetWidth, useTargetAsMinWidth = _a.useTargetAsMinWidth, directionalHintFixed = _a.directionalHintFixed, shouldFocusOnMount = _a.shouldFocusOnMount, shouldFocusOnContainer = _a.shouldFocusOnContainer, title = _a.title, styles = _a.styles, theme = _a.theme, calloutProps = _a.calloutProps, _b = _a.onRenderSubMenu, onRenderSubMenu = _b === void 0 ? this._onRenderSubMenu : _b, _c = _a.onRenderMenuList, onRenderMenuList = _c === void 0 ? this._onRenderMenuList : _c, focusZoneProps = _a.focusZoneProps, getMenuClassNames = _a.getMenuClassNames;
        this._classNames = getMenuClassNames
            ? getMenuClassNames(theme, className)
            : getClassNames(styles, {
                theme: theme,
                className: className
            });
        var hasIcons = itemsHaveIcons(items);
        function itemsHaveIcons(contextualMenuItems) {
            for (var _i = 0, contextualMenuItems_1 = contextualMenuItems; _i < contextualMenuItems_1.length; _i++) {
                var item = contextualMenuItems_1[_i];
                if (!!item.iconProps) {
                    return true;
                }
                if (item.itemType === ContextualMenuItemType.Section && item.sectionProps && itemsHaveIcons(item.sectionProps.items)) {
                    return true;
                }
            }
            return false;
        }
        this._adjustedFocusZoneProps = tslib_1.__assign({}, focusZoneProps, { direction: this._getFocusZoneDirection() });
        var hasCheckmarks = canAnyMenuItemsCheck(items);
        var submenuProps = this.state.expandedMenuItemKey && this.props.hidden !== true ? this._getSubmenuProps() : null;
        isBeakVisible = isBeakVisible === undefined ? this.props.responsiveMode <= ResponsiveMode.medium : isBeakVisible;
        /**
         * When useTargetWidth is true, get the width of the target element and apply it for the context menu container
         */
        var contextMenuStyle;
        var targetAsHtmlElement = this._target;
        if ((useTargetWidth || useTargetAsMinWidth) && targetAsHtmlElement && targetAsHtmlElement.offsetWidth) {
            var targetBoundingRect = targetAsHtmlElement.getBoundingClientRect();
            var targetWidth = targetBoundingRect.width - 2 /* Accounts for 1px border */;
            if (useTargetWidth) {
                contextMenuStyle = {
                    width: targetWidth
                };
            }
            else if (useTargetAsMinWidth) {
                contextMenuStyle = {
                    minWidth: targetWidth
                };
            }
        }
        // The menu should only return if items were provided, if no items were provided then it should not appear.
        if (items && items.length > 0) {
            var totalItemCount = 0;
            for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
                var item = items_1[_i];
                if (item.itemType !== ContextualMenuItemType.Divider && item.itemType !== ContextualMenuItemType.Header) {
                    var itemCount = item.customOnRenderListLength ? item.customOnRenderListLength : 1;
                    totalItemCount += itemCount;
                }
            }
            var calloutStyles = !getMenuClassNames && this._classNames.subComponentStyles
                ? this._classNames.subComponentStyles.callout
                : undefined;
            return (React.createElement(Callout, tslib_1.__assign({ styles: calloutStyles }, calloutProps, { target: target, isBeakVisible: isBeakVisible, beakWidth: beakWidth, directionalHint: directionalHint, directionalHintForRTL: directionalHintForRTL, gapSpace: gapSpace, coverTarget: coverTarget, doNotLayer: doNotLayer, className: css('ms-ContextualMenu-Callout', calloutProps && calloutProps.className), setInitialFocus: shouldFocusOnMount, onDismiss: this.props.onDismiss, onScroll: this._onScroll, bounds: bounds, directionalHintFixed: directionalHintFixed, alignTargetEdge: alignTargetEdge, hidden: this.props.hidden }),
                React.createElement("div", { "aria-label": ariaLabel, "aria-labelledby": labelElementId, style: contextMenuStyle, ref: function (host) { return (_this._host = host); }, id: id, className: this._classNames.container, tabIndex: shouldFocusOnContainer ? 0 : -1, onKeyDown: this._onMenuKeyDown, onKeyUp: this._onKeyUp, onFocusCapture: this._onMenuFocusCapture },
                    title && React.createElement("div", { className: this._classNames.title },
                        " ",
                        title,
                        " "),
                    items && items.length ? (React.createElement(FocusZone, tslib_1.__assign({}, this._adjustedFocusZoneProps, { className: this._classNames.root, isCircularNavigation: true, handleTabKey: FocusZoneTabbableElements.all }), onRenderMenuList({
                        items: items,
                        totalItemCount: totalItemCount,
                        hasCheckmarks: hasCheckmarks,
                        hasIcons: hasIcons
                    }, this._onRenderMenuList))) : null,
                    submenuProps && onRenderSubMenu(submenuProps, this._onRenderSubMenu))));
        }
        else {
            return null;
        }
    };
    /**
     * Return whether the contextual menu is hidden.
     * Undefined value for hidden is equivalent to hidden being false.
     * @param props - Props for the component
     */
    ContextualMenuBase.prototype._isHidden = function (props) {
        return !!props.hidden;
    };
    ContextualMenuBase.prototype._onMenuOpened = function () {
        this._events.on(this._targetWindow, 'resize', this.dismiss);
        this._shouldUpdateFocusOnMouseEvent = !this.props.delayUpdateFocusOnHover;
        this._gotMouseMove = false;
        this.props.onMenuOpened && this.props.onMenuOpened(this.props);
    };
    ContextualMenuBase.prototype._onMenuClosed = function () {
        this._events.off(this._targetWindow, 'resize', this.dismiss);
        this._tryFocusPreviousActiveElement();
        if (this.props.onMenuDismissed) {
            this.props.onMenuDismissed(this.props);
        }
        this._shouldUpdateFocusOnMouseEvent = !this.props.delayUpdateFocusOnHover;
        // We need to dismiss any submenu related state properties,
        // so that when the menu is shown again, the submenu is collapsed
        this.setState({
            expandedByMouseClick: undefined,
            dismissedMenuItemKey: undefined,
            expandedMenuItemKey: undefined,
            submenuTarget: undefined
        });
    };
    ContextualMenuBase.prototype._tryFocusPreviousActiveElement = function () {
        var _this = this;
        if (this._isFocusingPreviousElement && this._previousActiveElement) {
            // This slight delay is required so that we can unwind the stack, const react try to mess with focus, and then
            // apply the correct focus. Without the setTimeout, we end up focusing the correct thing, and then React wants
            // to reset the focus back to the thing it thinks should have been focused.
            // Note: Cannot be replaced by this._async.setTimout because those will be removed by the time this is called.
            setTimeout(function () {
                _this._previousActiveElement && _this._previousActiveElement.focus();
            }, 0);
        }
    };
    /**
     * Gets the focusZoneDirection by using the arrowDirection if specified,
     * the direction specificed in the focusZoneProps, or defaults to FocusZoneDirection.vertical
     */
    ContextualMenuBase.prototype._getFocusZoneDirection = function () {
        var focusZoneProps = this.props.focusZoneProps;
        return focusZoneProps && focusZoneProps.direction !== undefined ? focusZoneProps.direction : FocusZoneDirection.vertical;
    };
    ContextualMenuBase.prototype._onRenderSubMenu = function (subMenuProps, defaultRender) {
        throw Error('ContextualMenuBase: onRenderSubMenu callback is null or undefined. ' +
            'Please ensure to set `onRenderSubMenu` property either manually or with `styled` helper.');
    };
    ContextualMenuBase.prototype._renderMenuItem = function (item, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons) {
        var renderedItems = [];
        var iconProps = item.iconProps || { iconName: 'None' };
        var getItemClassNames = item.getItemClassNames, itemProps = item.itemProps;
        var styles = itemProps ? itemProps.styles : undefined;
        // We only send a dividerClassName when the item to be rendered is a divider. For all other cases, the default divider style is used.
        var dividerClassName = item.itemType === ContextualMenuItemType.Divider ? item.className : undefined;
        var subMenuIconClassName = item.submenuIconProps ? item.submenuIconProps.className : '';
        var itemClassNames;
        // IContextualMenuItem#getItemClassNames for backwards compatibility
        // otherwise uses mergeStyles for class names.
        if (getItemClassNames) {
            itemClassNames = getItemClassNames(this.props.theme, isItemDisabled(item), this.state.expandedMenuItemKey === item.key, !!getIsChecked(item), !!item.href, iconProps.iconName !== 'None', item.className, dividerClassName, iconProps.className, subMenuIconClassName, item.primaryDisabled);
        }
        else {
            var itemStyleProps = {
                theme: this.props.theme,
                disabled: isItemDisabled(item),
                expanded: this.state.expandedMenuItemKey === item.key,
                checked: !!getIsChecked(item),
                isAnchorLink: !!item.href,
                knownIcon: iconProps.iconName !== 'None',
                itemClassName: item.className,
                dividerClassName: dividerClassName,
                iconClassName: iconProps.className,
                subMenuClassName: subMenuIconClassName,
                primaryDisabled: item.primaryDisabled
            };
            var menuItemStyles = this._classNames.subComponentStyles
                ? this._classNames.subComponentStyles.menuItem
                : undefined;
            // We need to generate default styles then override if styles are provided
            // since the ContextualMenu currently handles item classNames.
            itemClassNames = mergeStyleSets(getContextualMenuItemClassNames(getItemStyles, itemStyleProps), getContextualMenuItemClassNames(menuItemStyles, itemStyleProps), getContextualMenuItemClassNames(styles, itemStyleProps));
        }
        if (item.text === '-' || item.name === '-') {
            item.itemType = ContextualMenuItemType.Divider;
        }
        switch (item.itemType) {
            case ContextualMenuItemType.Divider:
                renderedItems.push(this._renderSeparator(index, itemClassNames));
                break;
            case ContextualMenuItemType.Header:
                renderedItems.push(this._renderSeparator(index, itemClassNames));
                var headerItem = this._renderHeaderMenuItem(item, itemClassNames, index, hasCheckmarks, hasIcons);
                renderedItems.push(this._renderListItem(headerItem, item.key || index, itemClassNames, item.title));
                break;
            case ContextualMenuItemType.Section:
                renderedItems.push(this._renderSectionItem(item, itemClassNames, index, hasCheckmarks, hasIcons));
                break;
            default:
                var menuItem = this._renderNormalItem(item, itemClassNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons);
                renderedItems.push(this._renderListItem(menuItem, item.key || index, itemClassNames, item.title));
                break;
        }
        return renderedItems;
    };
    ContextualMenuBase.prototype._renderSectionItem = function (sectionItem, menuClassNames, index, hasCheckmarks, hasIcons) {
        var _this = this;
        var sectionProps = sectionItem.sectionProps;
        if (!sectionProps) {
            return;
        }
        var headerItem;
        if (sectionProps.title) {
            var headerContextualMenuItem = {
                key: "section-" + sectionProps.title + "-title",
                itemType: ContextualMenuItemType.Header,
                text: sectionProps.title
            };
            headerItem = this._renderHeaderMenuItem(headerContextualMenuItem, menuClassNames, index, hasCheckmarks, hasIcons);
        }
        if (sectionProps.items && sectionProps.items.length > 0) {
            return (React.createElement("li", { role: "presentation", key: sectionProps.key || sectionItem.key || "section-" + index },
                React.createElement("div", { role: "group" },
                    React.createElement("ul", { className: this._classNames.list },
                        sectionProps.topDivider && this._renderSeparator(index, menuClassNames, true, true),
                        headerItem && this._renderListItem(headerItem, sectionItem.key || index, menuClassNames, sectionItem.title),
                        sectionProps.items.map(function (contextualMenuItem, itemsIndex) {
                            return _this._renderMenuItem(contextualMenuItem, itemsIndex, itemsIndex, sectionProps.items.length, hasCheckmarks, hasIcons);
                        }),
                        sectionProps.bottomDivider && this._renderSeparator(index, menuClassNames, false, true)))));
        }
    };
    ContextualMenuBase.prototype._renderListItem = function (content, key, classNames, title) {
        return (React.createElement("li", { role: "presentation", title: title, key: key, className: classNames.item }, content));
    };
    ContextualMenuBase.prototype._renderSeparator = function (index, classNames, top, fromSection) {
        if (fromSection || index > 0) {
            return (React.createElement("li", { role: "separator", key: 'separator-' + index + (top === undefined ? '' : top ? '-top' : '-bottom'), className: classNames.divider, "aria-hidden": "true" }));
        }
        return null;
    };
    ContextualMenuBase.prototype._renderNormalItem = function (item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons) {
        if (item.onRender) {
            return item.onRender(tslib_1.__assign({ 'aria-posinset': focusableElementIndex + 1, 'aria-setsize': totalItemCount }, item), this.dismiss);
        }
        if (item.href) {
            return this._renderAnchorMenuItem(item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons);
        }
        if (item.split && hasSubmenu(item)) {
            return this._renderSplitButton(item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons);
        }
        return this._renderButtonItem(item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons);
    };
    ContextualMenuBase.prototype._renderHeaderMenuItem = function (item, classNames, index, hasCheckmarks, hasIcons) {
        var _a = this.props.contextualMenuItemAs, ChildrenRenderer = _a === void 0 ? ContextualMenuItem : _a;
        var itemProps = item.itemProps;
        var divHtmlProperties = itemProps && getNativeProps(itemProps, divProperties);
        return (React.createElement("div", tslib_1.__assign({ className: this._classNames.header }, divHtmlProperties, { style: item.style }),
            React.createElement(ChildrenRenderer, tslib_1.__assign({ item: item, classNames: classNames, index: index, onCheckmarkClick: hasCheckmarks ? this._onItemClick : undefined, hasIcons: hasIcons }, itemProps))));
    };
    ContextualMenuBase.prototype._renderAnchorMenuItem = function (item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons) {
        var contextualMenuItemAs = this.props.contextualMenuItemAs;
        var expandedMenuItemKey = this.state.expandedMenuItemKey;
        return (React.createElement(ContextualMenuAnchor, { item: item, classNames: classNames, index: index, focusableElementIndex: focusableElementIndex, totalItemCount: totalItemCount, hasCheckmarks: hasCheckmarks, hasIcons: hasIcons, contextualMenuItemAs: contextualMenuItemAs, onItemMouseEnter: this._onItemMouseEnterBase, onItemMouseLeave: this._onMouseItemLeave, onItemMouseMove: this._onItemMouseMoveBase, onItemMouseDown: this._onItemMouseDown, executeItemClick: this._executeItemClick, onItemClick: this._onAnchorClick, onItemKeyDown: this._onItemKeyDown, getSubMenuId: this._getSubMenuId, expandedMenuItemKey: expandedMenuItemKey, openSubMenu: this._onItemSubMenuExpand, dismissSubMenu: this._onSubMenuDismiss, dismissMenu: this.dismiss }));
    };
    ContextualMenuBase.prototype._renderButtonItem = function (item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons) {
        var contextualMenuItemAs = this.props.contextualMenuItemAs;
        var expandedMenuItemKey = this.state.expandedMenuItemKey;
        return (React.createElement(ContextualMenuButton, { item: item, classNames: classNames, index: index, focusableElementIndex: focusableElementIndex, totalItemCount: totalItemCount, hasCheckmarks: hasCheckmarks, hasIcons: hasIcons, contextualMenuItemAs: contextualMenuItemAs, onItemMouseEnter: this._onItemMouseEnterBase, onItemMouseLeave: this._onMouseItemLeave, onItemMouseMove: this._onItemMouseMoveBase, onItemMouseDown: this._onItemMouseDown, executeItemClick: this._executeItemClick, onItemClick: this._onItemClick, onItemClickBase: this._onItemClickBase, onItemKeyDown: this._onItemKeyDown, getSubMenuId: this._getSubMenuId, expandedMenuItemKey: expandedMenuItemKey, openSubMenu: this._onItemSubMenuExpand, dismissSubMenu: this._onSubMenuDismiss, dismissMenu: this.dismiss }));
    };
    ContextualMenuBase.prototype._renderSplitButton = function (item, classNames, index, focusableElementIndex, totalItemCount, hasCheckmarks, hasIcons) {
        var contextualMenuItemAs = this.props.contextualMenuItemAs;
        var expandedMenuItemKey = this.state.expandedMenuItemKey;
        return (React.createElement(ContextualMenuSplitButton, { item: item, classNames: classNames, index: index, focusableElementIndex: focusableElementIndex, totalItemCount: totalItemCount, hasCheckmarks: hasCheckmarks, hasIcons: hasIcons, contextualMenuItemAs: contextualMenuItemAs, onItemMouseEnter: this._onItemMouseEnterBase, onItemMouseLeave: this._onMouseItemLeave, onItemMouseMove: this._onItemMouseMoveBase, onItemMouseDown: this._onItemMouseDown, executeItemClick: this._executeItemClick, onItemClick: this._onItemClick, onItemClickBase: this._onItemClickBase, onItemKeyDown: this._onItemKeyDown, openSubMenu: this._onItemSubMenuExpand, dismissSubMenu: this._onSubMenuDismiss, dismissMenu: this.dismiss, expandedMenuItemKey: expandedMenuItemKey, onTap: this._onPointerAndTouchEvent }));
    };
    /**
     * Returns true if the key for the event is alt (Mac option) or meta (Mac command).
     */
    ContextualMenuBase.prototype._isAltOrMeta = function (ev) {
        return ev.which === KeyCodes.alt || ev.key === 'Meta';
    };
    ContextualMenuBase.prototype._shouldIgnoreMouseEvent = function () {
        return !this._isScrollIdle || !this._gotMouseMove;
    };
    /**
     * Handles updating focus when mouseEnter or mouseMove fire.
     * As part of updating focus, This function will also update
     * the expand/collapse state accordingly.
     */
    ContextualMenuBase.prototype._updateFocusOnMouseEvent = function (item, ev, target) {
        var _this = this;
        var targetElement = target ? target : ev.currentTarget;
        var _a = this.props.subMenuHoverDelay, timeoutDuration = _a === void 0 ? NavigationIdleDelay : _a;
        if (item.key === this.state.expandedMenuItemKey) {
            return;
        }
        if (this._enterTimerId !== undefined) {
            this._async.clearTimeout(this._enterTimerId);
            this._enterTimerId = undefined;
        }
        // If the menu is not expanded we can update focus without any delay
        if (this.state.expandedMenuItemKey === undefined) {
            targetElement.focus();
        }
        // Delay updating expanding/dismissing the submenu
        // and only set focus if we have not already done so
        if (hasSubmenu(item)) {
            ev.stopPropagation();
            this._enterTimerId = this._async.setTimeout(function () {
                targetElement.focus();
                _this.setState({
                    expandedByMouseClick: true
                });
                _this._onItemSubMenuExpand(item, targetElement);
                _this._enterTimerId = undefined;
            }, timeoutDuration);
        }
        else {
            this._enterTimerId = this._async.setTimeout(function () {
                _this._onSubMenuDismiss(ev);
                targetElement.focus();
                _this._enterTimerId = undefined;
            }, timeoutDuration);
        }
    };
    ContextualMenuBase.prototype._getSubmenuProps = function () {
        var _a = this.state, submenuTarget = _a.submenuTarget, expandedMenuItemKey = _a.expandedMenuItemKey;
        var item = this._findItemByKey(expandedMenuItemKey);
        var submenuProps = null;
        if (item) {
            submenuProps = {
                items: getSubmenuItems(item),
                target: submenuTarget,
                onDismiss: this._onSubMenuDismiss,
                isSubMenu: true,
                id: this.state.subMenuId,
                shouldFocusOnMount: true,
                shouldFocusOnContainer: this.state.expandedByMouseClick,
                directionalHint: getRTL() ? DirectionalHint.leftTopEdge : DirectionalHint.rightTopEdge,
                className: this.props.className,
                gapSpace: 0,
                isBeakVisible: false
            };
            if (item.subMenuProps) {
                assign(submenuProps, item.subMenuProps);
            }
        }
        return submenuProps;
    };
    ContextualMenuBase.prototype._findItemByKey = function (key) {
        var items = this.props.items;
        return this._findItemByKeyFromItems(key, items);
    };
    /**
     * Returns the item that mathes a given key if any.
     * @param key - The key of the item to match
     * @param items - The items to look for the key
     */
    ContextualMenuBase.prototype._findItemByKeyFromItems = function (key, items) {
        for (var _i = 0, items_2 = items; _i < items_2.length; _i++) {
            var item = items_2[_i];
            if (item.itemType === ContextualMenuItemType.Section && item.sectionProps) {
                var match = this._findItemByKeyFromItems(key, item.sectionProps.items);
                if (match) {
                    return match;
                }
            }
            else if (item.key && item.key === key) {
                return item;
            }
        }
    };
    ContextualMenuBase.prototype._setTargetWindowAndElement = function (target) {
        if (target) {
            if (typeof target === 'string') {
                var currentDoc = getDocument();
                this._target = currentDoc ? currentDoc.querySelector(target) : null;
                this._targetWindow = getWindow(this);
            }
            else if (target.stopPropagation) {
                this._targetWindow = getWindow(target.toElement);
                this._target = target;
            }
            else if (target.x !== undefined && target.y !== undefined) {
                this._targetWindow = getWindow(this);
                this._target = target;
            }
            else if (target.current !== undefined) {
                this._target = target.current;
                this._targetWindow = getWindow(this._target);
            }
            else {
                var targetElement = target;
                this._targetWindow = getWindow(targetElement);
                this._target = target;
            }
        }
        else {
            this._targetWindow = getWindow(this);
        }
    };
    // The default ContextualMenu properties have no items and beak, the default submenu direction is right and top.
    ContextualMenuBase.defaultProps = {
        items: [],
        shouldFocusOnMount: true,
        gapSpace: 0,
        directionalHint: DirectionalHint.bottomAutoEdge,
        beakWidth: 16
    };
    ContextualMenuBase = tslib_1.__decorate([
        withResponsiveMode
    ], ContextualMenuBase);
    return ContextualMenuBase;
}(BaseComponent));
export { ContextualMenuBase };
//# sourceMappingURL=ContextualMenu.base.js.map