define(["require", "exports", "tslib", "react", "../../Utilities", "../../Callout", "../../Checkbox", "../../Button", "../../common/DirectionalHint", "./Dropdown.types", "./utilities/DropdownSizePosCache", "../../FocusZone", "../../Icon", "../../Label", "../../KeytipData", "../../Panel", "../../utilities/decorators/withResponsiveMode", "../../utilities/selectableOption/SelectableOption.types"], function (require, exports, tslib_1, React, Utilities_1, Callout_1, Checkbox_1, Button_1, DirectionalHint_1, Dropdown_types_1, DropdownSizePosCache_1, FocusZone_1, Icon_1, Label_1, KeytipData_1, Panel_1, withResponsiveMode_1, SelectableOption_types_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var getClassNames = Utilities_1.classNamesFunction();
    var DropdownBase = /** @class */ (function (_super) {
        tslib_1.__extends(DropdownBase, _super);
        function DropdownBase(props) {
            var _this = _super.call(this, props) || this;
            _this._host = React.createRef();
            _this._focusZone = React.createRef();
            _this._dropDown = React.createRef();
            _this._scrollIdleDelay = 250 /* ms */;
            _this._sizePosCache = new DropdownSizePosCache_1.DropdownSizePosCache();
            /** Render text in dropdown input */
            _this._onRenderTitle = function (items) {
                var _a = _this.props.multiSelectDelimiter, multiSelectDelimiter = _a === void 0 ? ', ' : _a;
                var displayTxt = items.map(function (i) { return i.text; }).join(multiSelectDelimiter);
                return React.createElement("span", null, displayTxt);
            };
            /** Render placeholder text in dropdown input */
            _this._onRenderPlaceholder = function (props) {
                if (!_this._placeholder) {
                    return null;
                }
                return React.createElement("span", null, _this._placeholder);
            };
            /** Render Callout or Panel container and pass in list */
            _this._onRenderContainer = function (props) {
                var _a = _this.props, responsiveMode = _a.responsiveMode, calloutProps = _a.calloutProps, panelProps = _a.panelProps, dropdownWidth = _a.dropdownWidth;
                var isSmall = responsiveMode <= withResponsiveMode_1.ResponsiveMode.medium;
                var panelStyles = _this._classNames.subComponentStyles
                    ? _this._classNames.subComponentStyles.panel
                    : undefined;
                return isSmall ? (React.createElement(Panel_1.Panel, tslib_1.__assign({ isOpen: true, isLightDismiss: true, onDismissed: _this._onDismiss, hasCloseButton: false, styles: panelStyles }, panelProps), _this._renderFocusableList(props))) : (React.createElement(Callout_1.Callout, tslib_1.__assign({ isBeakVisible: false, gapSpace: 0, doNotLayer: false, directionalHintFixed: false, directionalHint: DirectionalHint_1.DirectionalHint.bottomLeftEdge }, calloutProps, { className: _this._classNames.callout, target: _this._dropDown.current, onDismiss: _this._onDismiss, onScroll: _this._onScroll, onPositioned: _this._onPositioned, calloutWidth: dropdownWidth || (_this._dropDown.current ? _this._dropDown.current.clientWidth : 0) }), _this._renderFocusableList(props)));
            };
            /** Render Caret Down Icon */
            _this._onRenderCaretDown = function (props) {
                return React.createElement(Icon_1.Icon, { className: _this._classNames.caretDown, iconName: "ChevronDown" });
            };
            /** Render List of items */
            _this._onRenderList = function (props) {
                var _a = _this.props.onRenderItem, onRenderItem = _a === void 0 ? _this._onRenderItem : _a;
                return React.createElement(React.Fragment, null, _this.props.options.map(function (item, index) { return onRenderItem(tslib_1.__assign({}, item, { index: index }), _this._onRenderItem); }));
            };
            _this._onRenderItem = function (item) {
                switch (item.itemType) {
                    case SelectableOption_types_1.SelectableOptionMenuItemType.Divider:
                        return _this._renderSeparator(item);
                    case SelectableOption_types_1.SelectableOptionMenuItemType.Header:
                        return _this._renderHeader(item);
                    default:
                        return _this._renderOption(item);
                }
            };
            _this._renderOption = function (item) {
                var _a = _this.props.onRenderOption, onRenderOption = _a === void 0 ? _this._onRenderOption : _a;
                var _b = _this.state.selectedIndices, selectedIndices = _b === void 0 ? [] : _b;
                var id = _this._id;
                var isItemSelected = item.index !== undefined && selectedIndices ? selectedIndices.indexOf(item.index) > -1 : false;
                // select the right className based on the combination of selected/disabled
                var itemClassName = isItemSelected && item.disabled === true // predicate: both selected and disabled
                    ? _this._classNames.dropdownItemSelectedAndDisabled
                    : isItemSelected // predicate: selected only
                        ? _this._classNames.dropdownItemSelected
                        : item.disabled === true // predicate: disabled only
                            ? _this._classNames.dropdownItemDisabled
                            : _this._classNames.dropdownItem;
                return !_this.props.multiSelect ? (React.createElement(Button_1.CommandButton, { id: id + '-list' + item.index, key: item.key, "data-index": item.index, "data-is-focusable": !item.disabled, disabled: item.disabled, className: itemClassName, onClick: _this._onItemClick(item), onMouseEnter: _this._onItemMouseEnter.bind(_this, item), onMouseLeave: _this._onMouseItemLeave.bind(_this, item), onMouseMove: _this._onItemMouseMove.bind(_this, item), role: "option", "aria-selected": isItemSelected ? 'true' : 'false', ariaLabel: item.ariaLabel, title: item.title ? item.title : item.text }, onRenderOption(item, _this._onRenderOption))) : (React.createElement(Checkbox_1.Checkbox, { id: id + '-list' + item.index, key: item.key, "data-index": item.index, "data-is-focusable": !item.disabled, disabled: item.disabled, onChange: _this._onItemClick(item), inputProps: {
                        onMouseEnter: _this._onItemMouseEnter.bind(_this, item),
                        onMouseLeave: _this._onMouseItemLeave.bind(_this, item),
                        onMouseMove: _this._onItemMouseMove.bind(_this, item)
                    }, label: item.text, title: item.title ? item.title : item.text, onRenderLabel: _this._onRenderLabel.bind(_this, item), className: itemClassName, role: "option", "aria-selected": isItemSelected ? 'true' : 'false', checked: isItemSelected }));
            };
            /** Render content of item (i.e. text/icon inside of button) */
            _this._onRenderOption = function (item) {
                return React.createElement("span", { className: _this._classNames.dropdownOptionText }, item.text);
            };
            /** Render custom label for drop down item */
            _this._onRenderLabel = function (item) {
                var _a = _this.props.onRenderOption, onRenderOption = _a === void 0 ? _this._onRenderOption : _a;
                return onRenderOption(item, _this._onRenderOption);
            };
            _this._onPositioned = function (positions) {
                if (_this._focusZone.current) {
                    // Focusing an element can trigger a reflow. Making this wait until there is an animation
                    // frame can improve perf significantly.
                    _this._async.requestAnimationFrame(function () {
                        var selectedIndices = _this.state.selectedIndices;
                        if (selectedIndices && selectedIndices[0] && !_this.props.options[selectedIndices[0]].disabled) {
                            var element = Utilities_1.getDocument().querySelector("#" + _this._id + "-list" + selectedIndices[0]);
                            _this._focusZone.current.focusElement(element);
                        }
                        else {
                            _this._focusZone.current.focus();
                        }
                    });
                }
                if (!_this.state.calloutRenderEdge || _this.state.calloutRenderEdge !== positions.targetEdge) {
                    _this.setState({
                        calloutRenderEdge: positions.targetEdge
                    });
                }
            };
            _this._onItemClick = function (item) {
                return function (event) {
                    if (!item.disabled) {
                        _this.setSelectedIndex(event, item.index);
                        if (!_this.props.multiSelect) {
                            // only close the callout when it's in single-select mode
                            _this.setState({
                                isOpen: false
                            });
                        }
                    }
                };
            };
            /**
             * 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;
                }, _this._scrollIdleDelay);
            };
            _this._onMouseItemLeave = function (item, ev) {
                if (_this._shouldIgnoreMouseEvent()) {
                    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.current) {
                    if (_this._host.current.setActive) {
                        try {
                            _this._host.current.setActive();
                        }
                        catch (e) {
                            /* no-op */
                        }
                    }
                    else {
                        _this._host.current.focus();
                    }
                }
            };
            _this._onDismiss = function () {
                _this.setState({ isOpen: false });
                if (_this._dropDown.current) {
                    _this._dropDown.current.focus();
                }
            };
            _this._onDropdownBlur = function (ev) {
                // If Dropdown disabled do not proceed with this logic.
                var disabled = _this._isDisabled();
                if (disabled) {
                    return;
                }
                // hasFocus tracks whether the root element has focus so always update the state.
                _this.setState({ hasFocus: false });
                if (_this.state.isOpen) {
                    // Do not onBlur when the callout is opened
                    return;
                }
                if (_this.props.onBlur) {
                    _this.props.onBlur(ev);
                }
            };
            _this._onDropdownKeyDown = function (ev) {
                // If Dropdown disabled do not process any keyboard events.
                var disabled = _this._isDisabled();
                if (disabled) {
                    return;
                }
                // Take note if we are processing an alt (option) or meta (command) keydown.
                // See comment in _shouldHandleKeyUp for reasoning.
                _this._lastKeyDownWasAltOrMeta = _this._isAltOrMeta(ev);
                if (_this.props.onKeyDown) {
                    _this.props.onKeyDown(ev);
                    if (ev.defaultPrevented) {
                        return;
                    }
                }
                var newIndex;
                var selectedIndex = _this.state.selectedIndices.length ? _this.state.selectedIndices[0] : -1;
                var containsExpandCollapseModifier = ev.altKey || ev.metaKey;
                var isOpen = _this.state.isOpen;
                switch (ev.which) {
                    case Utilities_1.KeyCodes.enter:
                        _this.setState({
                            isOpen: !isOpen
                        });
                        break;
                    case Utilities_1.KeyCodes.escape:
                        if (!isOpen) {
                            return;
                        }
                        _this.setState({
                            isOpen: false
                        });
                        break;
                    case Utilities_1.KeyCodes.up:
                        if (containsExpandCollapseModifier) {
                            if (isOpen) {
                                _this.setState({ isOpen: false });
                                break;
                            }
                            return;
                        }
                        if (_this.props.multiSelect) {
                            _this.setState({ isOpen: true });
                        }
                        else if (!_this._isDisabled()) {
                            newIndex = _this._moveIndex(ev, -1, selectedIndex - 1, selectedIndex);
                        }
                        break;
                    case Utilities_1.KeyCodes.down:
                        if (containsExpandCollapseModifier) {
                            ev.stopPropagation();
                            ev.preventDefault();
                        }
                        if ((containsExpandCollapseModifier && !isOpen) || _this.props.multiSelect) {
                            _this.setState({ isOpen: true });
                        }
                        else if (!_this._isDisabled()) {
                            newIndex = _this._moveIndex(ev, 1, selectedIndex + 1, selectedIndex);
                        }
                        break;
                    case Utilities_1.KeyCodes.home:
                        if (!_this.props.multiSelect) {
                            newIndex = _this._moveIndex(ev, 1, 0, selectedIndex);
                        }
                        break;
                    case Utilities_1.KeyCodes.end:
                        if (!_this.props.multiSelect) {
                            newIndex = _this._moveIndex(ev, -1, _this.props.options.length - 1, selectedIndex);
                        }
                        break;
                    case Utilities_1.KeyCodes.space:
                        // event handled in _onDropdownKeyUp
                        break;
                    default:
                        return;
                }
                if (newIndex !== selectedIndex) {
                    ev.stopPropagation();
                    ev.preventDefault();
                }
            };
            _this._onDropdownKeyUp = function (ev) {
                // If Dropdown disabled do not process any keyboard events.
                var disabled = _this._isDisabled();
                if (disabled) {
                    return;
                }
                var shouldHandleKey = _this._shouldHandleKeyUp(ev);
                var isOpen = _this.state.isOpen;
                if (_this.props.onKeyUp) {
                    _this.props.onKeyUp(ev);
                    if (ev.preventDefault) {
                        return;
                    }
                }
                switch (ev.which) {
                    case Utilities_1.KeyCodes.space:
                        _this.setState({
                            isOpen: !isOpen
                        });
                        break;
                    default:
                        if (shouldHandleKey && isOpen) {
                            _this.setState({ isOpen: false });
                        }
                        return;
                }
                ev.stopPropagation();
                ev.preventDefault();
            };
            _this._onZoneKeyDown = function (ev) {
                var elementToFocus;
                // Take note if we are processing an alt (option) or meta (command) keydown.
                // See comment in _shouldHandleKeyUp for reasoning.
                _this._lastKeyDownWasAltOrMeta = _this._isAltOrMeta(ev);
                var containsExpandCollapseModifier = ev.altKey || ev.metaKey;
                switch (ev.which) {
                    case Utilities_1.KeyCodes.up:
                        if (containsExpandCollapseModifier) {
                            _this.setState({ isOpen: false });
                        }
                        else {
                            if (_this._host.current) {
                                elementToFocus = Utilities_1.getLastFocusable(_this._host.current, _this._host.current.lastChild, true);
                            }
                        }
                        break;
                    // All directional keystrokes should be canceled when the zone is rendered.
                    // This avoids the body scroll from reacting and thus dismissing the dropdown.
                    case Utilities_1.KeyCodes.home:
                    case Utilities_1.KeyCodes.end:
                    case Utilities_1.KeyCodes.pageUp:
                    case Utilities_1.KeyCodes.pageDown:
                        break;
                    case Utilities_1.KeyCodes.down:
                        if (!containsExpandCollapseModifier && _this._host.current) {
                            elementToFocus = Utilities_1.getFirstFocusable(_this._host.current, _this._host.current.firstChild, true);
                        }
                        break;
                    case Utilities_1.KeyCodes.escape:
                        _this.setState({ isOpen: false });
                        break;
                    case Utilities_1.KeyCodes.tab:
                        _this.setState({ isOpen: false });
                        return;
                    default:
                        return;
                }
                if (elementToFocus) {
                    elementToFocus.focus();
                }
                ev.stopPropagation();
                ev.preventDefault();
            };
            _this._onZoneKeyUp = function (ev) {
                var shouldHandleKey = _this._shouldHandleKeyUp(ev);
                if (shouldHandleKey && _this.state.isOpen) {
                    _this.setState({ isOpen: false });
                    ev.preventDefault();
                }
            };
            _this._onDropdownClick = function (ev) {
                if (_this.props.onClick) {
                    _this.props.onClick(ev);
                    if (ev.preventDefault) {
                        return;
                    }
                }
                var isOpen = _this.state.isOpen;
                var disabled = _this._isDisabled();
                if (!disabled) {
                    _this.setState({
                        isOpen: !isOpen
                    });
                }
            };
            _this._onFocus = function (ev) {
                var _a = _this.state, isOpen = _a.isOpen, selectedIndices = _a.selectedIndices;
                var multiSelect = _this.props.multiSelect;
                var disabled = _this._isDisabled();
                if (!disabled) {
                    if (!isOpen && selectedIndices.length === 0 && !multiSelect) {
                        // Per aria
                        _this._moveIndex(ev, 1, 0, -1);
                    }
                    if (_this.props.onFocus) {
                        _this.props.onFocus(ev);
                    }
                    _this.setState({ hasFocus: true });
                }
            };
            /**
             * Because the isDisabled prop is deprecated, we have had to repeat this logic all over the place.
             * This helper method avoids all the repetition.
             */
            _this._isDisabled = function () {
                var disabled = _this.props.disabled;
                var isDisabled = _this.props.isDisabled;
                // Remove this deprecation workaround at 1.0.0
                if (isDisabled !== undefined) {
                    disabled = isDisabled;
                }
                return disabled;
            };
            _this._warnDeprecations({
                isDisabled: 'disabled',
                onChanged: 'onChange',
                placeHolder: 'placeholder',
                onRenderPlaceHolder: 'onRenderPlaceholder'
            });
            _this._warnMutuallyExclusive({
                defaultSelectedKey: 'selectedKey',
                defaultSelectedKeys: 'selectedKeys',
                selectedKeys: 'selectedKey',
                multiSelect: 'defaultSelectedKey',
                selectedKey: 'multiSelect'
            });
            _this._id = props.id || Utilities_1.getId('Dropdown');
            _this._isScrollIdle = true;
            var selectedIndices;
            if (_this.props.multiSelect) {
                var selectedKeys = props.defaultSelectedKeys !== undefined ? props.defaultSelectedKeys : props.selectedKeys;
                selectedIndices = _this._getSelectedIndexes(props.options, selectedKeys);
            }
            else {
                var selectedKey = props.defaultSelectedKey !== undefined ? props.defaultSelectedKey : props.selectedKey;
                selectedIndices = _this._getSelectedIndexes(props.options, selectedKey);
                _this._sizePosCache.updateOptions(props.options);
            }
            _this.state = {
                isOpen: false,
                selectedIndices: selectedIndices,
                hasFocus: false,
                calloutRenderEdge: undefined
            };
            return _this;
        }
        DropdownBase.prototype.componentWillReceiveProps = function (newProps) {
            // In controlled component usage where selectedKey is provided, update the selectedIndex
            // state if the key or options change.
            var selectedKeyProp;
            // this does a shallow compare (assumes options are pure), for the purposes of determining whether
            // defaultSelectedKey/defaultSelectedKeys are respected.
            var didOptionsChange = newProps.options !== this.props.options;
            if (newProps.multiSelect) {
                if (didOptionsChange && newProps.defaultSelectedKeys !== undefined) {
                    selectedKeyProp = 'defaultSelectedKeys';
                }
                else {
                    selectedKeyProp = 'selectedKeys';
                }
            }
            else {
                if (didOptionsChange && newProps.defaultSelectedKey !== undefined) {
                    selectedKeyProp = 'defaultSelectedKey';
                }
                else {
                    selectedKeyProp = 'selectedKey';
                }
            }
            if (newProps[selectedKeyProp] !== undefined && (newProps[selectedKeyProp] !== this.props[selectedKeyProp] || didOptionsChange)) {
                this.setState({
                    selectedIndices: this._getSelectedIndexes(newProps.options, newProps[selectedKeyProp])
                });
            }
            if (newProps.options !== this.props.options && // preexisting code assumes purity of the options...
                !newProps.multiSelect // only relevant in single selection
            ) {
                this._sizePosCache.updateOptions(newProps.options);
            }
        };
        DropdownBase.prototype.componentDidUpdate = function (prevProps, prevState) {
            if (prevState.isOpen === true && this.state.isOpen === false) {
                this._gotMouseMove = false;
                if (this._dropDown.current) {
                    this._dropDown.current.focus();
                }
                if (this.props.onDismiss) {
                    this.props.onDismiss();
                }
            }
        };
        DropdownBase.prototype.render = function () {
            var _this = this;
            var id = this._id;
            var props = this.props;
            var className = props.className, label = props.label, options = props.options, ariaLabel = props.ariaLabel, required = props.required, errorMessage = props.errorMessage, multiSelect = props.multiSelect, keytipProps = props.keytipProps, propStyles = props.styles, theme = props.theme, panelProps = props.panelProps, calloutProps = props.calloutProps, _a = props.onRenderTitle, onRenderTitle = _a === void 0 ? this._onRenderTitle : _a, _b = props.onRenderContainer, onRenderContainer = _b === void 0 ? this._onRenderContainer : _b, _c = props.onRenderCaretDown, onRenderCaretDown = _c === void 0 ? this._onRenderCaretDown : _c;
            var _d = this.state, isOpen = _d.isOpen, selectedIndices = _d.selectedIndices, hasFocus = _d.hasFocus, calloutRenderEdge = _d.calloutRenderEdge;
            var onRenderPlaceholder = props.onRenderPlaceholder || props.onRenderPlaceHolder || this._onRenderPlaceholder;
            var selectedOptions = this._getAllSelectedOptions(options, selectedIndices);
            var divProps = Utilities_1.getNativeProps(props, Utilities_1.divProperties);
            var disabled = this._isDisabled();
            var optionId = id + '-option';
            var ariaAttrs = multiSelect || disabled
                ? {
                    role: undefined,
                    ariaActiveDescendant: undefined,
                    childRole: undefined,
                    ariaSetSize: undefined,
                    ariaPosInSet: undefined,
                    ariaSelected: undefined
                }
                : // single select
                    {
                        role: 'listbox',
                        ariaActiveDescendant: isOpen && selectedIndices.length === 1 && selectedIndices[0] >= 0 ? this._id + '-list' + selectedIndices[0] : optionId,
                        childRole: 'option',
                        ariaSetSize: this._sizePosCache.optionSetSize,
                        ariaPosInSet: this._sizePosCache.positionInSet(selectedIndices[0]),
                        ariaSelected: selectedIndices[0] === undefined ? undefined : true
                    };
            this._classNames = getClassNames(propStyles, {
                theme: theme,
                className: className,
                hasError: !!(errorMessage && errorMessage.length > 0),
                isOpen: isOpen,
                required: required,
                disabled: disabled,
                isRenderingPlaceholder: !selectedOptions.length,
                panelClassName: !!panelProps ? panelProps.className : undefined,
                calloutClassName: !!calloutProps ? calloutProps.className : undefined,
                calloutRenderEdge: calloutRenderEdge
            });
            var labelStyles = this._classNames.subComponentStyles
                ? this._classNames.subComponentStyles.label
                : undefined;
            return (React.createElement("div", { className: this._classNames.root },
                label && (React.createElement(Label_1.Label, { className: this._classNames.label, id: id + '-label', htmlFor: id, required: required, styles: labelStyles }, label)),
                React.createElement(KeytipData_1.KeytipData, { keytipProps: keytipProps, disabled: disabled }, function (keytipAttributes) { return (React.createElement("div", tslib_1.__assign({}, keytipAttributes, { "data-is-focusable": !disabled, ref: _this._dropDown, id: id, tabIndex: disabled ? -1 : 0, "aria-expanded": isOpen ? 'true' : 'false', role: ariaAttrs.role, "aria-label": ariaLabel, "aria-labelledby": label && !ariaLabel ? id + '-label' : undefined, "aria-describedby": Utilities_1.mergeAriaAttributeValues(optionId, keytipAttributes['aria-describedby']), "aria-activedescendant": isOpen ? ariaAttrs.ariaActiveDescendant : undefined, "aria-required": required, "aria-disabled": disabled, "aria-owns": isOpen ? id + '-list' : undefined }, divProps, { className: _this._classNames.dropdown, onBlur: _this._onDropdownBlur, onKeyDown: _this._onDropdownKeyDown, onKeyUp: _this._onDropdownKeyUp, onClick: _this._onDropdownClick, onFocus: _this._onFocus }),
                    React.createElement("span", { id: optionId, className: _this._classNames.title, "aria-atomic": true, role: ariaAttrs.childRole, "aria-live": !hasFocus || disabled || multiSelect || isOpen ? 'off' : 'assertive', "aria-label": selectedOptions.length ? selectedOptions[0].text : _this._placeholder, "aria-setsize": ariaAttrs.ariaSetSize, "aria-posinset": ariaAttrs.ariaPosInSet, "aria-selected": ariaAttrs.ariaSelected }, // If option is selected render title, otherwise render the placeholder text
                    selectedOptions.length
                        ? onRenderTitle(selectedOptions, _this._onRenderTitle)
                        : onRenderPlaceholder(props, _this._onRenderPlaceholder)),
                    React.createElement("span", { className: _this._classNames.caretDownWrapper }, onRenderCaretDown(props, _this._onRenderCaretDown)))); }),
                isOpen && onRenderContainer(props, this._onRenderContainer),
                errorMessage && errorMessage.length > 0 && React.createElement("div", { className: this._classNames.errorMessage }, errorMessage)));
        };
        DropdownBase.prototype.focus = function (shouldOpenOnFocus) {
            if (this._dropDown.current && this._dropDown.current.tabIndex !== -1) {
                this._dropDown.current.focus();
                if (shouldOpenOnFocus) {
                    this.setState({
                        isOpen: true
                    });
                }
            }
        };
        DropdownBase.prototype.setSelectedIndex = function (event, index) {
            var _a = this.props, onChange = _a.onChange, onChanged = _a.onChanged, options = _a.options, selectedKey = _a.selectedKey, selectedKeys = _a.selectedKeys, multiSelect = _a.multiSelect, notifyOnReselect = _a.notifyOnReselect;
            var _b = this.state.selectedIndices, selectedIndices = _b === void 0 ? [] : _b;
            var checked = selectedIndices ? selectedIndices.indexOf(index) > -1 : false;
            index = Math.max(0, Math.min(options.length - 1, index));
            if (!multiSelect && !notifyOnReselect && index === selectedIndices[0]) {
                return;
            }
            else if (!multiSelect && selectedKey === undefined) {
                // Set the selected option if this is an uncontrolled component
                this.setState({
                    selectedIndices: [index]
                });
            }
            else if (multiSelect && selectedKeys === undefined) {
                var newIndexes = selectedIndices ? this._copyArray(selectedIndices) : [];
                if (checked) {
                    var position = newIndexes.indexOf(index);
                    if (position > -1) {
                        // unchecked the current one
                        newIndexes.splice(position, 1);
                    }
                }
                else {
                    // add the new selected index into the existing one
                    newIndexes.push(index);
                }
                this.setState({
                    selectedIndices: newIndexes
                });
            }
            if (onChange) {
                // for single-select, option passed in will always be selected.
                // for multi-select, flip the checked value
                var changedOpt = multiSelect ? tslib_1.__assign({}, options[index], { selected: !checked }) : options[index];
                onChange(tslib_1.__assign({}, event, { target: this._dropDown.current }), changedOpt, index);
            }
            if (onChanged) {
                // for single-select, option passed in will always be selected.
                // for multi-select, flip the checked value
                var changedOpt = multiSelect ? tslib_1.__assign({}, options[index], { selected: !checked }) : options[index];
                onChanged(changedOpt, index);
            }
        };
        Object.defineProperty(DropdownBase.prototype, "_placeholder", {
            /** Get either props.placeholder (new name) or props.placeHolder (old name) */
            get: function () {
                return this.props.placeholder || this.props.placeHolder;
            },
            enumerable: true,
            configurable: true
        });
        DropdownBase.prototype._copyArray = function (array) {
            var newArray = [];
            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
                var element = array_1[_i];
                newArray.push(element);
            }
            return newArray;
        };
        /**
         * Finds the next valid Dropdown option and sets the selected index to it.
         * @param stepValue - Value of how many items the function should traverse.  Should be -1 or 1.
         * @param index - Index of where the search should start
         * @param selectedIndex - The selectedIndex Dropdown's state
         * @returns The next valid dropdown option's index
         */
        DropdownBase.prototype._moveIndex = function (event, stepValue, index, selectedIndex) {
            var options = this.props.options;
            // Return selectedIndex if nothing has changed or options is empty
            if (selectedIndex === index || options.length === 0) {
                return selectedIndex;
            }
            // Set starting index to 0 if index is < 0
            if (index < 0) {
                index = 0;
            }
            // Set starting index to last option index if greater than options.length
            if (index >= options.length) {
                index = options.length - 1;
            }
            var stepCounter = 0;
            // If current index is a header or divider, or disabled, increment by step
            while (options[index].itemType === Dropdown_types_1.DropdownMenuItemType.Header ||
                options[index].itemType === Dropdown_types_1.DropdownMenuItemType.Divider ||
                options[index].disabled) {
                // If stepCounter exceeds length of options, then return selectedIndex (-1)
                if (stepCounter >= options.length) {
                    return selectedIndex;
                }
                // If index + stepValue is out of bounds, wrap around
                if (index + stepValue < 0) {
                    index = options.length;
                }
                else if (index + stepValue >= options.length) {
                    index = -1;
                }
                index = index + stepValue;
                stepCounter++;
            }
            this.setSelectedIndex(event, index);
            return index;
        };
        /** Wrap item list in a FocusZone */
        DropdownBase.prototype._renderFocusableList = function (props) {
            var _a = props.onRenderList, onRenderList = _a === void 0 ? this._onRenderList : _a, label = props.label;
            var id = this._id;
            return (React.createElement("div", { className: this._classNames.dropdownItemsWrapper, onKeyDown: this._onZoneKeyDown, onKeyUp: this._onZoneKeyUp, ref: this._host, tabIndex: 0 },
                React.createElement(FocusZone_1.FocusZone, { ref: this._focusZone, direction: FocusZone_1.FocusZoneDirection.vertical, id: id + '-list', className: this._classNames.dropdownItems, "aria-labelledby": label ? id + '-label' : undefined, role: "listbox" }, onRenderList(props, this._onRenderList))));
        };
        DropdownBase.prototype._renderSeparator = function (item) {
            var index = item.index, key = item.key;
            if (index > 0) {
                return React.createElement("div", { role: "separator", key: key, className: this._classNames.dropdownDivider });
            }
            return null;
        };
        DropdownBase.prototype._renderHeader = function (item) {
            var _a = this.props.onRenderOption, onRenderOption = _a === void 0 ? this._onRenderOption : _a;
            var key = item.key;
            return (React.createElement("div", { key: key, className: this._classNames.dropdownItemHeader }, onRenderOption(item, this._onRenderOption)));
        };
        DropdownBase.prototype._onItemMouseEnter = function (item, ev) {
            if (this._shouldIgnoreMouseEvent()) {
                return;
            }
            var targetElement = ev.currentTarget;
            targetElement.focus();
        };
        DropdownBase.prototype._onItemMouseMove = function (item, ev) {
            var targetElement = ev.currentTarget;
            this._gotMouseMove = true;
            if (!this._isScrollIdle || document.activeElement === targetElement) {
                return;
            }
            targetElement.focus();
        };
        DropdownBase.prototype._shouldIgnoreMouseEvent = function () {
            return !this._isScrollIdle || !this._gotMouseMove;
        };
        /** Get all selected indexes for multi-select mode */
        DropdownBase.prototype._getSelectedIndexes = function (options, selectedKey) {
            if (selectedKey === undefined) {
                if (this.props.multiSelect) {
                    return this._getAllSelectedIndices(options);
                }
                var selectedIndex = this._getSelectedIndex(options, null);
                return selectedIndex !== -1 ? [selectedIndex] : [];
            }
            else if (!Array.isArray(selectedKey)) {
                return [this._getSelectedIndex(options, selectedKey)];
            }
            var selectedIndices = [];
            for (var _i = 0, selectedKey_1 = selectedKey; _i < selectedKey_1.length; _i++) {
                var key = selectedKey_1[_i];
                selectedIndices.push(this._getSelectedIndex(options, key));
            }
            return selectedIndices;
        };
        /** Get all selected options for multi-select mode */
        DropdownBase.prototype._getAllSelectedOptions = function (options, selectedIndices) {
            var selectedOptions = [];
            for (var _i = 0, selectedIndices_1 = selectedIndices; _i < selectedIndices_1.length; _i++) {
                var index = selectedIndices_1[_i];
                var option = options[index];
                if (option) {
                    selectedOptions.push(option);
                }
            }
            return selectedOptions;
        };
        DropdownBase.prototype._getAllSelectedIndices = function (options) {
            return options.map(function (option, index) { return (option.selected ? index : -1); }).filter(function (index) { return index !== -1; });
        };
        DropdownBase.prototype._getSelectedIndex = function (options, selectedKey) {
            return Utilities_1.findIndex(options, function (option) {
                // tslint:disable-next-line:triple-equals
                if (selectedKey != null) {
                    return option.key === selectedKey;
                }
                else {
                    return !!option.isSelected || !!option.selected;
                }
            });
        };
        /**
         * Returns true if the key for the event is alt (Mac option) or meta (Mac command).
         */
        DropdownBase.prototype._isAltOrMeta = function (ev) {
            return ev.which === Utilities_1.KeyCodes.alt || ev.key === 'Meta';
        };
        /**
         * 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.
         */
        DropdownBase.prototype._shouldHandleKeyUp = function (ev) {
            var keyPressIsAltOrMetaAlone = this._lastKeyDownWasAltOrMeta && this._isAltOrMeta(ev);
            this._lastKeyDownWasAltOrMeta = false;
            return !!keyPressIsAltOrMetaAlone && !(Utilities_1.isMac() || Utilities_1.isIOS());
        };
        DropdownBase.defaultProps = {
            options: []
        };
        DropdownBase = tslib_1.__decorate([
            withResponsiveMode_1.withResponsiveMode
        ], DropdownBase);
        return DropdownBase;
    }(Utilities_1.BaseComponent));
    exports.DropdownBase = DropdownBase;
});
//# sourceMappingURL=Dropdown.base.js.map