(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/cdk/keycodes'), require('@angular/cdk/overlay'), require('@angular/core'), require('@angular/forms'), require('ng-zorro-antd/core/animation'), require('ng-zorro-antd/core/config'), require('ng-zorro-antd/core/no-animation'), require('ng-zorro-antd/core/overlay'), require('ng-zorro-antd/core/util'), require('rxjs'), require('rxjs/operators'), require('ng-zorro-antd/i18n'), require('@angular/common'), require('ng-zorro-antd/core/highlight'), require('ng-zorro-antd/core/outlet'), require('ng-zorro-antd/empty'), require('ng-zorro-antd/icon'), require('ng-zorro-antd/input')) :
    typeof define === 'function' && define.amd ? define('ng-zorro-antd/cascader', ['exports', '@angular/cdk/keycodes', '@angular/cdk/overlay', '@angular/core', '@angular/forms', 'ng-zorro-antd/core/animation', 'ng-zorro-antd/core/config', 'ng-zorro-antd/core/no-animation', 'ng-zorro-antd/core/overlay', 'ng-zorro-antd/core/util', 'rxjs', 'rxjs/operators', 'ng-zorro-antd/i18n', '@angular/common', 'ng-zorro-antd/core/highlight', 'ng-zorro-antd/core/outlet', 'ng-zorro-antd/empty', 'ng-zorro-antd/icon', 'ng-zorro-antd/input'], factory) :
    (global = global || self, factory((global['ng-zorro-antd'] = global['ng-zorro-antd'] || {}, global['ng-zorro-antd'].cascader = {}), global.ng.cdk.keycodes, global.ng.cdk.overlay, global.ng.core, global.ng.forms, global['ng-zorro-antd'].core.animation, global['ng-zorro-antd'].core.config, global['ng-zorro-antd'].core['no-animation'], global['ng-zorro-antd'].core.overlay, global['ng-zorro-antd'].core.util, global.rxjs, global.rxjs.operators, global['ng-zorro-antd'].i18n, global.ng.common, global['ng-zorro-antd'].core.highlight, global['ng-zorro-antd'].core.outlet, global['ng-zorro-antd'].empty, global['ng-zorro-antd'].icon, global['ng-zorro-antd'].input));
}(this, (function (exports, keycodes, overlay, core, forms, animation, config, noAnimation, overlay$1, util, rxjs, operators, i18n, common, highlight, outlet, empty, icon, input) { 'use strict';

    /**
     * @fileoverview added by tsickle
     * Generated from: typings.ts
     * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
     */
    /**
     * @deprecated Use the prefixed version.
     * @record
     */
    function CascaderOption() { }
    if (false) {
        /** @type {?|undefined} */
        CascaderOption.prototype.value;
        /** @type {?|undefined} */
        CascaderOption.prototype.label;
        /** @type {?|undefined} */
        CascaderOption.prototype.title;
        /** @type {?|undefined} */
        CascaderOption.prototype.disabled;
        /** @type {?|undefined} */
        CascaderOption.prototype.loading;
        /** @type {?|undefined} */
        CascaderOption.prototype.isLeaf;
        /** @type {?|undefined} */
        CascaderOption.prototype.parent;
        /** @type {?|undefined} */
        CascaderOption.prototype.children;
        /* Skipping unhandled member: [key: string]: NzSafeAny;*/
    }
    /**
     * @deprecated Use the prefixed version.
     * @record
     */
    function CascaderSearchOption() { }
    if (false) {
        /** @type {?} */
        CascaderSearchOption.prototype.path;
    }
    /**
     * @record
     */
    function NzShowSearchOptions() { }
    if (false) {
        /** @type {?|undefined} */
        NzShowSearchOptions.prototype.filter;
        /** @type {?|undefined} */
        NzShowSearchOptions.prototype.sorter;
    }
    /**
     * @param {?} options
     * @return {?}
     */
    function isShowSearchObject(options) {
        return typeof options !== 'boolean';
    }
    /**
     * To avoid circular dependency, provide an interface of `NzCascaderComponent`
     * for `NzCascaderService`.
     * @record
     */
    function NzCascaderComponentAsSource() { }
    if (false) {
        /** @type {?} */
        NzCascaderComponentAsSource.prototype.inputValue;
        /** @type {?} */
        NzCascaderComponentAsSource.prototype.nzShowSearch;
        /** @type {?} */
        NzCascaderComponentAsSource.prototype.nzLabelProperty;
        /** @type {?} */
        NzCascaderComponentAsSource.prototype.nzValueProperty;
        /** @type {?} */
        NzCascaderComponentAsSource.prototype.nzChangeOnSelect;
        /**
         * @param {?} option
         * @param {?} level
         * @return {?}
         */
        NzCascaderComponentAsSource.prototype.nzChangeOn = function (option, level) { };
        /**
         * @param {?} node
         * @param {?} index
         * @return {?}
         */
        NzCascaderComponentAsSource.prototype.nzLoadData = function (node, index) { };
    }

    /**
     * @fileoverview added by tsickle
     * Generated from: utils.ts
     * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
     */
    /**
     * Use of this source code is governed by an MIT-style license that can be
     * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
     */
    /**
     * @param {?} o
     * @return {?}
     */
    function isChildOption(o) {
        return o.isLeaf || !o.children || !o.children.length;
    }
    /**
     * @param {?} o
     * @return {?}
     */
    function isParentOption(o) {
        return !!o.children && !!o.children.length && !o.isLeaf;
    }

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */
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    /**
     * @fileoverview added by tsickle
     * Generated from: cascader-li.component.ts
     * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
     */
    var NzCascaderOptionComponent = /** @class */ (function () {
        /**
         * @param {?} cdr
         * @param {?} elementRef
         * @param {?} renderer
         */
        function NzCascaderOptionComponent(cdr, elementRef, renderer) {
            this.cdr = cdr;
            this.optionTemplate = null;
            this.activated = false;
            this.nzLabelProperty = 'label';
            renderer.addClass(elementRef.nativeElement, 'ant-cascader-menu-item');
        }
        Object.defineProperty(NzCascaderOptionComponent.prototype, "optionLabel", {
            /**
             * @return {?}
             */
            get: function () {
                return this.option[this.nzLabelProperty];
            },
            enumerable: false,
            configurable: true
        });
        /**
         * @return {?}
         */
        NzCascaderOptionComponent.prototype.markForCheck = function () {
            this.cdr.markForCheck();
        };
        return NzCascaderOptionComponent;
    }());
    NzCascaderOptionComponent.decorators = [
        { type: core.Component, args: [{
                    changeDetection: core.ChangeDetectionStrategy.OnPush,
                    encapsulation: core.ViewEncapsulation.None,
                    selector: '[nz-cascader-option]',
                    exportAs: 'nzCascaderOption',
                    template: "\n    <ng-container *ngIf=\"optionTemplate; else defaultOptionTemplate\">\n      <ng-template [ngTemplateOutlet]=\"optionTemplate\" [ngTemplateOutletContext]=\"{ $implicit: option, index: columnIndex }\"></ng-template>\n    </ng-container>\n    <ng-template #defaultOptionTemplate>\n      <span [innerHTML]=\"optionLabel | nzHighlight: highlightText:'g':'ant-cascader-menu-item-keyword'\"></span>\n    </ng-template>\n    <span *ngIf=\"!option.isLeaf || option.children?.length || option.loading\" class=\"ant-cascader-menu-item-expand-icon\">\n      <i nz-icon [nzType]=\"option.loading ? 'loading' : 'right'\"></i>\n    </span>\n  ",
                    host: {
                        '[attr.title]': 'option.title || optionLabel',
                        '[class.ant-cascader-menu-item-active]': 'activated',
                        '[class.ant-cascader-menu-item-expand]': '!option.isLeaf',
                        '[class.ant-cascader-menu-item-disabled]': 'option.disabled'
                    }
                }] }
    ];
    /** @nocollapse */
    NzCascaderOptionComponent.ctorParameters = function () { return [
        { type: core.ChangeDetectorRef },
        { type: core.ElementRef },
        { type: core.Renderer2 }
    ]; };
    NzCascaderOptionComponent.propDecorators = {
        optionTemplate: [{ type: core.Input }],
        option: [{ type: core.Input }],
        activated: [{ type: core.Input }],
        highlightText: [{ type: core.Input }],
        nzLabelProperty: [{ type: core.Input }],
        columnIndex: [{ type: core.Input }]
    };
    if (false) {
        /** @type {?} */
        NzCascaderOptionComponent.prototype.optionTemplate;
        /** @type {?} */
        NzCascaderOptionComponent.prototype.option;
        /** @type {?} */
        NzCascaderOptionComponent.prototype.activated;
        /** @type {?} */
        NzCascaderOptionComponent.prototype.highlightText;
        /** @type {?} */
        NzCascaderOptionComponent.prototype.nzLabelProperty;
        /** @type {?} */
        NzCascaderOptionComponent.prototype.columnIndex;
        /**
         * @type {?}
         * @private
         */
        NzCascaderOptionComponent.prototype.cdr;
    }

    /**
     * All data is stored and parsed in NzCascaderService.
     */
    var NzCascaderService = /** @class */ (function () {
        function NzCascaderService() {
            /**
             * Activated options in each column.
             */
            this.activatedOptions = [];
            /**
             * An array to store cascader items arranged in different layers.
             */
            this.columns = [];
            /**
             * If user has entered searching mode.
             */
            this.inSearchingMode = false;
            /**
             * Selected options would be output to user.
             */
            this.selectedOptions = [];
            this.values = [];
            this.$loading = new rxjs.BehaviorSubject(false);
            /**
             * Emit an event to notify cascader it needs to redraw because activated or
             * selected options are changed.
             */
            this.$redraw = new rxjs.Subject();
            /**
             * Emit an event when an option gets selected.
             * Emit true if a leaf options is selected.
             */
            this.$optionSelected = new rxjs.Subject();
            /**
             * Emit an event to notify cascader it needs to quit searching mode.
             * Only emit when user do select a searching option.
             */
            this.$quitSearching = new rxjs.Subject();
            /**
             * To hold columns before entering searching mode.
             */
            this.columnsSnapshot = [[]];
            /**
             * To hold activated options before entering searching mode.
             */
            this.activatedOptionsSnapshot = [];
        }
        Object.defineProperty(NzCascaderService.prototype, "nzOptions", {
            /**
             * Return cascader options in the first layer.
             * @return {?}
             */
            get: function () {
                return this.columns[0];
            },
            enumerable: false,
            configurable: true
        });
        /**
         * @return {?}
         */
        NzCascaderService.prototype.ngOnDestroy = function () {
            this.$redraw.complete();
            this.$quitSearching.complete();
            this.$optionSelected.complete();
            this.$loading.complete();
        };
        /**
         * Make sure that value matches what is displayed in the dropdown.
         * @param {?=} first
         * @return {?}
         */
        NzCascaderService.prototype.syncOptions = function (first) {
            var _this = this;
            if (first === void 0) { first = false; }
            /** @type {?} */
            var values = this.values;
            /** @type {?} */
            var hasValue = values && values.length;
            /** @type {?} */
            var lastColumnIndex = values.length - 1;
            /** @type {?} */
            var initColumnWithIndex = ( /**
             * @param {?} columnIndex
             * @return {?}
             */function (columnIndex) {
                /** @type {?} */
                var activatedOptionSetter = ( /**
                 * @return {?}
                 */function () {
                    var _a;
                    /** @type {?} */
                    var currentValue = values[columnIndex];
                    if (!util.isNotNil(currentValue)) {
                        _this.$redraw.next();
                        return;
                    }
                    /** @type {?} */
                    var option = _this.findOptionWithValue(columnIndex, values[columnIndex]) ||
                        (typeof currentValue === 'object'
                            ? currentValue
                            : (_a = {},
                                _a["" + _this.cascaderComponent.nzValueProperty] = currentValue,
                                _a["" + _this.cascaderComponent.nzLabelProperty] = currentValue,
                                _a));
                    _this.setOptionActivated(option, columnIndex, false, false);
                    if (columnIndex < lastColumnIndex) {
                        initColumnWithIndex(columnIndex + 1);
                    }
                    else {
                        _this.dropBehindColumns(columnIndex);
                        _this.selectedOptions = __spread(_this.activatedOptions);
                        _this.$redraw.next();
                    }
                });
                if (_this.isLoaded(columnIndex) || !_this.cascaderComponent.nzLoadData) {
                    activatedOptionSetter();
                }
                else {
                    /** @type {?} */
                    var option = _this.activatedOptions[columnIndex - 1] || {};
                    _this.loadChildren(option, columnIndex - 1, activatedOptionSetter);
                }
            });
            this.activatedOptions = [];
            this.selectedOptions = [];
            if (first && this.cascaderComponent.nzLoadData && !hasValue) {
                // Should also notify the component that value changes. Fix #3480.
                this.$redraw.next();
                return;
            }
            else {
                initColumnWithIndex(0);
            }
        };
        /**
         * Bind cascader component so this service could use inputs.
         * @param {?} cascaderComponent
         * @return {?}
         */
        NzCascaderService.prototype.withComponent = function (cascaderComponent) {
            this.cascaderComponent = cascaderComponent;
        };
        /**
         * Reset all options. Rebuild searching options if in searching mode.
         * @param {?} options
         * @return {?}
         */
        NzCascaderService.prototype.withOptions = function (options) {
            this.columnsSnapshot = this.columns = options && options.length ? [options] : [];
            if (this.inSearchingMode) {
                this.prepareSearchOptions(this.cascaderComponent.inputValue);
            }
            else if (this.columns.length) {
                this.syncOptions();
            }
        };
        /**
         * Try to set a option as activated.
         * @param {?} option Cascader option
         * @param {?} columnIndex Of which column this option is in
         * @param {?=} performSelect Select
         * @param {?=} loadingChildren Try to load children asynchronously.
         * @return {?}
         */
        NzCascaderService.prototype.setOptionActivated = function (option, columnIndex, performSelect, loadingChildren) {
            if (performSelect === void 0) { performSelect = false; }
            if (loadingChildren === void 0) { loadingChildren = true; }
            if (option.disabled) {
                return;
            }
            this.activatedOptions[columnIndex] = option;
            this.trackAncestorActivatedOptions(columnIndex);
            this.dropBehindActivatedOptions(columnIndex);
            /** @type {?} */
            var isParent = isParentOption(option);
            if (isParent) {
                // Parent option that has children.
                this.setColumnData(( /** @type {?} */(option.children)), columnIndex + 1, option);
            }
            else if (!option.isLeaf && loadingChildren) {
                // Parent option that should try to load children asynchronously.
                this.loadChildren(option, columnIndex);
            }
            else if (option.isLeaf) {
                // Leaf option.
                this.dropBehindColumns(columnIndex);
            }
            // Actually perform selection to make an options not only activated but also selected.
            if (performSelect) {
                this.setOptionSelected(option, columnIndex);
            }
            this.$redraw.next();
        };
        /**
         * @param {?} option
         * @param {?} index
         * @return {?}
         */
        NzCascaderService.prototype.setOptionSelected = function (option, index) {
            /** @type {?} */
            var changeOn = this.cascaderComponent.nzChangeOn;
            /** @type {?} */
            var shouldPerformSelection = ( /**
             * @param {?} o
             * @param {?} i
             * @return {?}
             */function (o, i) {
                return typeof changeOn === 'function' ? changeOn(o, i) : false;
            });
            if (option.isLeaf || this.cascaderComponent.nzChangeOnSelect || shouldPerformSelection(option, index)) {
                this.selectedOptions = __spread(this.activatedOptions);
                this.prepareEmitValue();
                this.$redraw.next();
                this.$optionSelected.next({ option: option, index: index });
            }
        };
        /**
         * @param {?} column
         * @return {?}
         */
        NzCascaderService.prototype.setOptionDeactivatedSinceColumn = function (column) {
            this.dropBehindActivatedOptions(column - 1);
            this.dropBehindColumns(column);
            this.$redraw.next();
        };
        /**
         * Set a searching option as selected, finishing up things.
         * @param {?} option
         * @return {?}
         */
        NzCascaderService.prototype.setSearchOptionSelected = function (option) {
            var _this = this;
            this.activatedOptions = [option];
            this.selectedOptions = __spread(option.path);
            this.prepareEmitValue();
            this.$redraw.next();
            this.$optionSelected.next({ option: option, index: 0 });
            setTimeout(( /**
             * @return {?}
             */function () {
                // Reset data and tell UI only to remove input and reset dropdown width style.
                _this.$quitSearching.next();
                _this.$redraw.next();
                _this.inSearchingMode = false;
                _this.columns = __spread(_this.columnsSnapshot);
                _this.activatedOptions = __spread(_this.selectedOptions);
            }), 200);
        };
        /**
         * Filter cascader options to reset `columns`.
         * @param {?} searchValue The string user wants to search.
         * @return {?}
         */
        NzCascaderService.prototype.prepareSearchOptions = function (searchValue) {
            var _this = this;
            /** @type {?} */
            var results = [];
            // Search results only have one layer.
            /** @type {?} */
            var path = [];
            /** @type {?} */
            var defaultFilter = ( /**
             * @param {?} i
             * @param {?} p
             * @return {?}
             */function (i, p) {
                return p.some(( /**
                 * @param {?} o
                 * @return {?}
                 */function (/**
                 * @param {?} o
                 * @return {?}
                 */ o) {
                    /** @type {?} */
                    var label = _this.getOptionLabel(o);
                    return !!label && label.indexOf(i) !== -1;
                }));
            });
            /** @type {?} */
            var showSearch = this.cascaderComponent.nzShowSearch;
            /** @type {?} */
            var filter = isShowSearchObject(showSearch) && showSearch.filter ? showSearch.filter : defaultFilter;
            /** @type {?} */
            var sorter = isShowSearchObject(showSearch) && showSearch.sorter ? showSearch.sorter : null;
            /** @type {?} */
            var loopChild = ( /**
             * @param {?} node
             * @param {?=} forceDisabled
             * @return {?}
             */function (node, forceDisabled) {
                var _a;
                if (forceDisabled === void 0) { forceDisabled = false; }
                path.push(node);
                /** @type {?} */
                var cPath = Array.from(path);
                if (filter(searchValue, cPath)) {
                    /** @type {?} */
                    var disabled = forceDisabled || node.disabled;
                    /** @type {?} */
                    var option = (_a = {
                            disabled: disabled,
                            isLeaf: true,
                            path: cPath
                        },
                        _a[_this.cascaderComponent.nzLabelProperty] = cPath.map(( /**
                         * @param {?} p
                         * @return {?}
                         */function (/**
                         * @param {?} p
                         * @return {?}
                         */ p) { return _this.getOptionLabel(p); })).join(' / '),
                        _a);
                    results.push(option);
                }
                path.pop();
            });
            /** @type {?} */
            var loopParent = ( /**
             * @param {?} node
             * @param {?=} forceDisabled
             * @return {?}
             */function (node, forceDisabled) {
                if (forceDisabled === void 0) { forceDisabled = false; }
                /** @type {?} */
                var disabled = forceDisabled || node.disabled;
                path.push(node);
                ( /** @type {?} */(node.children)).forEach(( /**
                 * @param {?} sNode
                 * @return {?}
                 */function (/**
                 * @param {?} sNode
                 * @return {?}
                 */ sNode) {
                    if (!sNode.parent) {
                        sNode.parent = node;
                    }
                    if (!sNode.isLeaf) {
                        loopParent(sNode, disabled);
                    }
                    if (sNode.isLeaf || !sNode.children || !sNode.children.length) {
                        loopChild(sNode, disabled);
                    }
                }));
                path.pop();
            });
            if (!this.columnsSnapshot.length) {
                this.columns = [[]];
                return;
            }
            this.columnsSnapshot[0].forEach(( /**
             * @param {?} o
             * @return {?}
             */function (/**
             * @param {?} o
             * @return {?}
             */ o) { return (isChildOption(o) ? loopChild(o) : loopParent(o)); }));
            if (sorter) {
                results.sort(( /**
                 * @param {?} a
                 * @param {?} b
                 * @return {?}
                 */function (a, b) { return sorter(a.path, b.path, searchValue); }));
            }
            this.columns = [results];
            this.$redraw.next(); // Search results may be empty, so should redraw.
        };
        /**
         * Toggle searching mode by UI. It deals with things not directly related to UI.
         * @param {?} toSearching If this cascader is entering searching mode
         * @return {?}
         */
        NzCascaderService.prototype.toggleSearchingMode = function (toSearching) {
            this.inSearchingMode = toSearching;
            if (toSearching) {
                this.activatedOptionsSnapshot = __spread(this.activatedOptions);
                this.activatedOptions = [];
                this.selectedOptions = [];
                this.$redraw.next();
            }
            else {
                // User quit searching mode without selecting an option.
                this.activatedOptions = __spread(this.activatedOptionsSnapshot);
                this.selectedOptions = __spread(this.activatedOptions);
                this.columns = __spread(this.columnsSnapshot);
                this.syncOptions();
                this.$redraw.next();
            }
        };
        /**
         * Clear selected options.
         * @return {?}
         */
        NzCascaderService.prototype.clear = function () {
            this.values = [];
            this.selectedOptions = [];
            this.activatedOptions = [];
            this.dropBehindColumns(0);
            this.prepareEmitValue();
            this.$redraw.next();
            this.$optionSelected.next(null);
        };
        /**
         * @param {?} o
         * @return {?}
         */
        NzCascaderService.prototype.getOptionLabel = function (o) {
            return ( /** @type {?} */(o[this.cascaderComponent.nzLabelProperty || 'label']));
        };
        /**
         * @param {?} o
         * @return {?}
         */
        NzCascaderService.prototype.getOptionValue = function (o) {
            return o[this.cascaderComponent.nzValueProperty || 'value'];
        };
        /**
         * Try to insert options into a column.
         * @private
         * @param {?} options Options to insert
         * @param {?} columnIndex Position
         * @param {?} parent
         * @return {?}
         */
        NzCascaderService.prototype.setColumnData = function (options, columnIndex, parent) {
            /** @type {?} */
            var existingOptions = this.columns[columnIndex];
            if (!util.arraysEqual(existingOptions, options)) {
                options.forEach(( /**
                 * @param {?} o
                 * @return {?}
                 */function (/**
                 * @param {?} o
                 * @return {?}
                 */ o) { return (o.parent = parent); }));
                this.columns[columnIndex] = options;
                this.dropBehindColumns(columnIndex);
            }
        };
        /**
         * Set all ancestor options as activated.
         * @private
         * @param {?} startIndex
         * @return {?}
         */
        NzCascaderService.prototype.trackAncestorActivatedOptions = function (startIndex) {
            for (var i = startIndex - 1; i >= 0; i--) {
                if (!this.activatedOptions[i]) {
                    this.activatedOptions[i] = ( /** @type {?} */(this.activatedOptions[i + 1].parent));
                }
            }
        };
        /**
         * @private
         * @param {?} lastReserveIndex
         * @return {?}
         */
        NzCascaderService.prototype.dropBehindActivatedOptions = function (lastReserveIndex) {
            this.activatedOptions = this.activatedOptions.splice(0, lastReserveIndex + 1);
        };
        /**
         * @private
         * @param {?} lastReserveIndex
         * @return {?}
         */
        NzCascaderService.prototype.dropBehindColumns = function (lastReserveIndex) {
            if (lastReserveIndex < this.columns.length - 1) {
                this.columns = this.columns.slice(0, lastReserveIndex + 1);
            }
        };
        /**
         * Load children of an option asynchronously.
         * @param {?} option
         * @param {?} columnIndex
         * @param {?=} success
         * @param {?=} failure
         * @return {?}
         */
        NzCascaderService.prototype.loadChildren = function (option, columnIndex, success, failure) {
            var _this = this;
            /** @type {?} */
            var loadFn = this.cascaderComponent.nzLoadData;
            if (loadFn) {
                // If there isn't any option in columns.
                this.$loading.next(columnIndex < 0);
                if (typeof option === 'object') {
                    option.loading = true;
                }
                loadFn(option, columnIndex).then(( /**
                 * @return {?}
                 */function () {
                    option.loading = false;
                    if (option.children) {
                        _this.setColumnData(option.children, columnIndex + 1, option);
                    }
                    if (success) {
                        success();
                    }
                    _this.$loading.next(false);
                    _this.$redraw.next();
                }), ( /**
                 * @return {?}
                 */function () {
                    option.loading = false;
                    option.isLeaf = true;
                    if (failure) {
                        failure();
                    }
                    _this.$redraw.next();
                }));
            }
        };
        /**
         * @private
         * @param {?} index
         * @return {?}
         */
        NzCascaderService.prototype.isLoaded = function (index) {
            return this.columns[index] && this.columns[index].length > 0;
        };
        /**
         * Find a option that has a given value in a given column.
         * @private
         * @param {?} columnIndex
         * @param {?} value
         * @return {?}
         */
        NzCascaderService.prototype.findOptionWithValue = function (columnIndex, value) {
            var _this = this;
            /** @type {?} */
            var targetColumn = this.columns[columnIndex];
            if (targetColumn) {
                /** @type {?} */
                var v_1 = typeof value === 'object' ? this.getOptionValue(value) : value;
                return ( /** @type {?} */(targetColumn.find(( /**
                 * @param {?} o
                 * @return {?}
                 */function (/**
                 * @param {?} o
                 * @return {?}
                 */ o) { return v_1 === _this.getOptionValue(o); }))));
            }
            return null;
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderService.prototype.prepareEmitValue = function () {
            var _this = this;
            this.values = this.selectedOptions.map(( /**
             * @param {?} o
             * @return {?}
             */function (/**
             * @param {?} o
             * @return {?}
             */ o) { return _this.getOptionValue(o); }));
        };
        return NzCascaderService;
    }());
    NzCascaderService.decorators = [
        { type: core.Injectable }
    ];
    if (false) {
        /**
         * Activated options in each column.
         * @type {?}
         */
        NzCascaderService.prototype.activatedOptions;
        /**
         * An array to store cascader items arranged in different layers.
         * @type {?}
         */
        NzCascaderService.prototype.columns;
        /**
         * If user has entered searching mode.
         * @type {?}
         */
        NzCascaderService.prototype.inSearchingMode;
        /**
         * Selected options would be output to user.
         * @type {?}
         */
        NzCascaderService.prototype.selectedOptions;
        /** @type {?} */
        NzCascaderService.prototype.values;
        /** @type {?} */
        NzCascaderService.prototype.$loading;
        /**
         * Emit an event to notify cascader it needs to redraw because activated or
         * selected options are changed.
         * @type {?}
         */
        NzCascaderService.prototype.$redraw;
        /**
         * Emit an event when an option gets selected.
         * Emit true if a leaf options is selected.
         * @type {?}
         */
        NzCascaderService.prototype.$optionSelected;
        /**
         * Emit an event to notify cascader it needs to quit searching mode.
         * Only emit when user do select a searching option.
         * @type {?}
         */
        NzCascaderService.prototype.$quitSearching;
        /**
         * To hold columns before entering searching mode.
         * @type {?}
         * @private
         */
        NzCascaderService.prototype.columnsSnapshot;
        /**
         * To hold activated options before entering searching mode.
         * @type {?}
         * @private
         */
        NzCascaderService.prototype.activatedOptionsSnapshot;
        /**
         * @type {?}
         * @private
         */
        NzCascaderService.prototype.cascaderComponent;
    }

    /** @type {?} */
    var NZ_CONFIG_COMPONENT_NAME = 'cascader';
    /** @type {?} */
    var defaultDisplayRender = ( /**
     * @param {?} labels
     * @return {?}
     */function (labels) { return labels.join(' / '); });
    var ɵ0 = defaultDisplayRender;
    var NzCascaderComponent = /** @class */ (function () {
        /**
         * @param {?} cascaderService
         * @param {?} i18nService
         * @param {?} nzConfigService
         * @param {?} cdr
         * @param {?} elementRef
         * @param {?} renderer
         * @param {?=} noAnimation
         */
        function NzCascaderComponent(cascaderService, i18nService, nzConfigService, cdr, elementRef, renderer, noAnimation) {
            this.cascaderService = cascaderService;
            this.i18nService = i18nService;
            this.nzConfigService = nzConfigService;
            this.cdr = cdr;
            this.noAnimation = noAnimation;
            this.nzOptionRender = null;
            this.nzShowInput = true;
            this.nzShowArrow = true;
            this.nzAllowClear = true;
            this.nzAutoFocus = false;
            this.nzChangeOnSelect = false;
            this.nzDisabled = false;
            this.nzExpandTrigger = 'click';
            this.nzValueProperty = 'value';
            this.nzLabelRender = null;
            this.nzLabelProperty = 'label';
            this.nzSize = 'default';
            this.nzShowSearch = false;
            this.nzPlaceHolder = '';
            this.nzMenuStyle = null;
            this.nzMouseEnterDelay = 150; // ms
            // ms
            this.nzMouseLeaveDelay = 150; // ms
            // ms
            this.nzTriggerAction = ( /** @type {?} */(['click']));
            this.nzVisibleChange = new core.EventEmitter();
            this.nzSelectionChange = new core.EventEmitter();
            this.nzSelect = new core.EventEmitter();
            this.nzClear = new core.EventEmitter();
            /**
             * If the dropdown should show the empty content.
             * `true` if there's no options.
             */
            this.shouldShowEmpty = false;
            this.menuVisible = false;
            this.isLoading = false;
            this.labelRenderContext = {};
            this.onChange = Function.prototype;
            this.onTouched = Function.prototype;
            this.positions = __spread(overlay$1.DEFAULT_CASCADER_POSITIONS);
            this.dropdownHeightStyle = '';
            this.isFocused = false;
            this.destroy$ = new rxjs.Subject();
            this.inputString = '';
            this.isOpening = false;
            this.delayMenuTimer = null;
            this.delaySelectTimer = null;
            this.el = elementRef.nativeElement;
            this.cascaderService.withComponent(this);
            renderer.addClass(elementRef.nativeElement, 'ant-cascader');
            renderer.addClass(elementRef.nativeElement, 'ant-cascader-picker');
        }
        Object.defineProperty(NzCascaderComponent.prototype, "nzOptions", {
            /**
             * @return {?}
             */
            get: function () {
                return this.cascaderService.nzOptions;
            },
            /**
             * @param {?} options
             * @return {?}
             */
            set: function (options) {
                this.cascaderService.withOptions(options);
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "inSearchingMode", {
            /**
             * @return {?}
             */
            get: function () {
                return this.cascaderService.inSearchingMode;
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "inputValue", {
            /**
             * @return {?}
             */
            get: function () {
                return this.inputString;
            },
            /**
             * @param {?} inputValue
             * @return {?}
             */
            set: function (inputValue) {
                this.inputString = inputValue;
                this.toggleSearchingMode(!!inputValue);
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "menuCls", {
            /**
             * @return {?}
             */
            get: function () {
                var _a;
                return _a = {}, _a["" + this.nzMenuClassName] = !!this.nzMenuClassName, _a;
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "menuColumnCls", {
            /**
             * @return {?}
             */
            get: function () {
                var _a;
                return _a = {}, _a["" + this.nzColumnClassName] = !!this.nzColumnClassName, _a;
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "hasInput", {
            /**
             * @private
             * @return {?}
             */
            get: function () {
                return !!this.inputValue;
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "hasValue", {
            /**
             * @private
             * @return {?}
             */
            get: function () {
                return this.cascaderService.values && this.cascaderService.values.length > 0;
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "showPlaceholder", {
            /**
             * @return {?}
             */
            get: function () {
                return !(this.hasInput || this.hasValue);
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "clearIconVisible", {
            /**
             * @return {?}
             */
            get: function () {
                return this.nzAllowClear && !this.nzDisabled && (this.hasValue || this.hasInput);
            },
            enumerable: false,
            configurable: true
        });
        Object.defineProperty(NzCascaderComponent.prototype, "isLabelRenderTemplate", {
            /**
             * @return {?}
             */
            get: function () {
                return !!this.nzLabelRender;
            },
            enumerable: false,
            configurable: true
        });
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.ngOnInit = function () {
            var _this = this;
            /** @type {?} */
            var srv = this.cascaderService;
            srv.$redraw.pipe(operators.takeUntil(this.destroy$)).subscribe(( /**
             * @return {?}
             */function () {
                // These operations would not mutate data.
                _this.checkChildren();
                _this.setDisplayLabel();
                _this.reposition();
                _this.setDropdownStyles();
                _this.cdr.markForCheck();
            }));
            srv.$loading.pipe(operators.takeUntil(this.destroy$)).subscribe(( /**
             * @param {?} loading
             * @return {?}
             */function (/**
             * @param {?} loading
             * @return {?}
             */ loading) {
                _this.isLoading = loading;
            }));
            srv.$optionSelected.pipe(operators.takeUntil(this.destroy$)).subscribe(( /**
             * @param {?} data
             * @return {?}
             */function (/**
             * @param {?} data
             * @return {?}
             */ data) {
                if (!data) {
                    _this.onChange([]);
                    _this.nzSelect.emit(null);
                    _this.nzSelectionChange.emit([]);
                }
                else {
                    var option = data.option, index = data.index;
                    /** @type {?} */
                    var shouldClose = option.isLeaf;
                    if (shouldClose) {
                        _this.delaySetMenuVisible(false);
                    }
                    _this.onChange(_this.cascaderService.values);
                    _this.nzSelectionChange.emit(_this.cascaderService.selectedOptions);
                    _this.nzSelect.emit({ option: option, index: index });
                    _this.cdr.markForCheck();
                }
            }));
            srv.$quitSearching.pipe(operators.takeUntil(this.destroy$)).subscribe(( /**
             * @return {?}
             */function () {
                _this.inputString = '';
                _this.dropdownWidthStyle = '';
            }));
            this.i18nService.localeChange.pipe(operators.startWith(), operators.takeUntil(this.destroy$)).subscribe(( /**
             * @return {?}
             */function () {
                _this.setLocale();
            }));
            this.nzConfigService
                .getConfigChangeEventForComponent(NZ_CONFIG_COMPONENT_NAME)
                .pipe(operators.takeUntil(this.destroy$))
                .subscribe(( /**
         * @return {?}
         */function () {
                _this.cdr.markForCheck();
            }));
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.ngOnDestroy = function () {
            this.destroy$.next();
            this.destroy$.complete();
            this.clearDelayMenuTimer();
            this.clearDelaySelectTimer();
        };
        /**
         * @param {?} fn
         * @return {?}
         */
        NzCascaderComponent.prototype.registerOnChange = function (fn) {
            this.onChange = fn;
        };
        /**
         * @param {?} fn
         * @return {?}
         */
        NzCascaderComponent.prototype.registerOnTouched = function (fn) {
            this.onTouched = fn;
        };
        /**
         * @param {?} value
         * @return {?}
         */
        NzCascaderComponent.prototype.writeValue = function (value) {
            this.cascaderService.values = util.toArray(value);
            this.cascaderService.syncOptions(true);
        };
        /**
         * @param {?} visible
         * @param {?=} delay
         * @param {?=} setOpening
         * @return {?}
         */
        NzCascaderComponent.prototype.delaySetMenuVisible = function (visible, delay, setOpening) {
            var _this = this;
            if (delay === void 0) { delay = 100; }
            if (setOpening === void 0) { setOpening = false; }
            this.clearDelayMenuTimer();
            if (delay) {
                if (visible && setOpening) {
                    this.isOpening = true;
                }
                this.delayMenuTimer = setTimeout(( /**
                 * @return {?}
                 */function () {
                    _this.setMenuVisible(visible);
                    _this.cdr.detectChanges();
                    _this.clearDelayMenuTimer();
                    if (visible) {
                        setTimeout(( /**
                         * @return {?}
                         */function () {
                            _this.isOpening = false;
                        }), 100);
                    }
                }), delay);
            }
            else {
                this.setMenuVisible(visible);
            }
        };
        /**
         * @param {?} visible
         * @return {?}
         */
        NzCascaderComponent.prototype.setMenuVisible = function (visible) {
            if (this.nzDisabled || this.menuVisible === visible) {
                return;
            }
            if (visible) {
                this.cascaderService.syncOptions();
            }
            this.menuVisible = visible;
            this.nzVisibleChange.emit(visible);
            this.cdr.detectChanges();
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.clearDelayMenuTimer = function () {
            if (this.delayMenuTimer) {
                clearTimeout(this.delayMenuTimer);
                this.delayMenuTimer = null;
            }
        };
        /**
         * @param {?=} event
         * @return {?}
         */
        NzCascaderComponent.prototype.clearSelection = function (event) {
            if (event) {
                event.preventDefault();
                event.stopPropagation();
            }
            this.labelRenderText = '';
            this.labelRenderContext = {};
            this.inputValue = '';
            this.setMenuVisible(false);
            this.cascaderService.clear();
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.getSubmitValue = function () {
            var _this = this;
            return this.cascaderService.selectedOptions.map(( /**
             * @param {?} o
             * @return {?}
             */function (/**
             * @param {?} o
             * @return {?}
             */ o) { return _this.cascaderService.getOptionValue(o); }));
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.focus = function () {
            if (!this.isFocused) {
                (this.input ? this.input.nativeElement : this.el).focus();
                this.isFocused = true;
            }
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.blur = function () {
            if (this.isFocused) {
                (this.input ? this.input.nativeElement : this.el).blur();
                this.isFocused = false;
            }
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.handleInputBlur = function () {
            this.menuVisible ? this.focus() : this.blur();
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.handleInputFocus = function () {
            this.focus();
        };
        /**
         * @param {?} event
         * @return {?}
         */
        NzCascaderComponent.prototype.onKeyDown = function (event) {
            /** @type {?} */
            var keyCode = event.keyCode;
            if (keyCode !== keycodes.DOWN_ARROW &&
                keyCode !== keycodes.UP_ARROW &&
                keyCode !== keycodes.LEFT_ARROW &&
                keyCode !== keycodes.RIGHT_ARROW &&
                keyCode !== keycodes.ENTER &&
                keyCode !== keycodes.BACKSPACE &&
                keyCode !== keycodes.ESCAPE) {
                return;
            }
            // Press any keys above to reopen menu.
            if (!this.menuVisible && keyCode !== keycodes.BACKSPACE && keyCode !== keycodes.ESCAPE) {
                return this.setMenuVisible(true);
            }
            // Make these keys work as default in searching mode.
            if (this.inSearchingMode && (keyCode === keycodes.BACKSPACE || keyCode === keycodes.LEFT_ARROW || keyCode === keycodes.RIGHT_ARROW)) {
                return;
            }
            // Interact with the component.
            if (this.menuVisible) {
                event.preventDefault();
                if (keyCode === keycodes.DOWN_ARROW) {
                    this.moveUpOrDown(false);
                }
                else if (keyCode === keycodes.UP_ARROW) {
                    this.moveUpOrDown(true);
                }
                else if (keyCode === keycodes.LEFT_ARROW) {
                    this.moveLeft();
                }
                else if (keyCode === keycodes.RIGHT_ARROW) {
                    this.moveRight();
                }
                else if (keyCode === keycodes.ENTER) {
                    this.onEnter();
                }
            }
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.onTriggerClick = function () {
            if (this.nzDisabled) {
                return;
            }
            if (this.nzShowSearch) {
                this.focus();
            }
            if (this.isActionTrigger('click')) {
                this.delaySetMenuVisible(!this.menuVisible, 100);
            }
            this.onTouched();
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.onTriggerMouseEnter = function () {
            if (this.nzDisabled || !this.isActionTrigger('hover')) {
                return;
            }
            this.delaySetMenuVisible(true, this.nzMouseEnterDelay, true);
        };
        /**
         * @param {?} event
         * @return {?}
         */
        NzCascaderComponent.prototype.onTriggerMouseLeave = function (event) {
            if (this.nzDisabled || !this.menuVisible || this.isOpening || !this.isActionTrigger('hover')) {
                event.preventDefault();
                return;
            }
            /** @type {?} */
            var mouseTarget = ( /** @type {?} */(event.relatedTarget));
            /** @type {?} */
            var hostEl = this.el;
            /** @type {?} */
            var menuEl = this.menu && (( /** @type {?} */(this.menu.nativeElement)));
            if (hostEl.contains(mouseTarget) || (menuEl && menuEl.contains(mouseTarget))) {
                return;
            }
            this.delaySetMenuVisible(false, this.nzMouseLeaveDelay);
        };
        /**
         * @param {?} option
         * @param {?} columnIndex
         * @param {?} event
         * @return {?}
         */
        NzCascaderComponent.prototype.onOptionMouseEnter = function (option, columnIndex, event) {
            event.preventDefault();
            if (this.nzExpandTrigger === 'hover') {
                if (!option.isLeaf) {
                    this.delaySetOptionActivated(option, columnIndex, false);
                }
                else {
                    this.cascaderService.setOptionDeactivatedSinceColumn(columnIndex);
                }
            }
        };
        /**
         * @param {?} option
         * @param {?} _columnIndex
         * @param {?} event
         * @return {?}
         */
        NzCascaderComponent.prototype.onOptionMouseLeave = function (option, _columnIndex, event) {
            event.preventDefault();
            if (this.nzExpandTrigger === 'hover' && !option.isLeaf) {
                this.clearDelaySelectTimer();
            }
        };
        /**
         * @param {?} option
         * @param {?} columnIndex
         * @param {?} event
         * @return {?}
         */
        NzCascaderComponent.prototype.onOptionClick = function (option, columnIndex, event) {
            if (event) {
                event.preventDefault();
            }
            if (option && option.disabled) {
                return;
            }
            this.el.focus();
            this.inSearchingMode
                ? this.cascaderService.setSearchOptionSelected(( /** @type {?} */(option)))
                : this.cascaderService.setOptionActivated(option, columnIndex, true);
        };
        /**
         * @private
         * @param {?} action
         * @return {?}
         */
        NzCascaderComponent.prototype.isActionTrigger = function (action) {
            return typeof this.nzTriggerAction === 'string' ? this.nzTriggerAction === action : this.nzTriggerAction.indexOf(action) !== -1;
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.onEnter = function () {
            /** @type {?} */
            var columnIndex = Math.max(this.cascaderService.activatedOptions.length - 1, 0);
            /** @type {?} */
            var option = this.cascaderService.activatedOptions[columnIndex];
            if (option && !option.disabled) {
                this.inSearchingMode
                    ? this.cascaderService.setSearchOptionSelected(( /** @type {?} */(option)))
                    : this.cascaderService.setOptionActivated(option, columnIndex, true);
            }
        };
        /**
         * @private
         * @param {?} isUp
         * @return {?}
         */
        NzCascaderComponent.prototype.moveUpOrDown = function (isUp) {
            /** @type {?} */
            var columnIndex = Math.max(this.cascaderService.activatedOptions.length - 1, 0);
            /** @type {?} */
            var activeOption = this.cascaderService.activatedOptions[columnIndex];
            /** @type {?} */
            var options = this.cascaderService.columns[columnIndex] || [];
            /** @type {?} */
            var length = options.length;
            /** @type {?} */
            var nextIndex = -1;
            if (!activeOption) {
                // Not selected options in this column
                nextIndex = isUp ? length : -1;
            }
            else {
                nextIndex = options.indexOf(activeOption);
            }
            while (true) {
                nextIndex = isUp ? nextIndex - 1 : nextIndex + 1;
                if (nextIndex < 0 || nextIndex >= length) {
                    break;
                }
                /** @type {?} */
                var nextOption = options[nextIndex];
                if (!nextOption || nextOption.disabled) {
                    continue;
                }
                this.cascaderService.setOptionActivated(nextOption, columnIndex);
                break;
            }
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.moveLeft = function () {
            /** @type {?} */
            var options = this.cascaderService.activatedOptions;
            if (options.length) {
                options.pop(); // Remove the last one
            }
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.moveRight = function () {
            /** @type {?} */
            var length = this.cascaderService.activatedOptions.length;
            /** @type {?} */
            var options = this.cascaderService.columns[length];
            if (options && options.length) {
                /** @type {?} */
                var nextOpt = options.find(( /**
                 * @param {?} o
                 * @return {?}
                 */function (/**
                 * @param {?} o
                 * @return {?}
                 */ o) { return !o.disabled; }));
                if (nextOpt) {
                    this.cascaderService.setOptionActivated(nextOpt, length);
                }
            }
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.clearDelaySelectTimer = function () {
            if (this.delaySelectTimer) {
                clearTimeout(this.delaySelectTimer);
                this.delaySelectTimer = null;
            }
        };
        /**
         * @private
         * @param {?} option
         * @param {?} columnIndex
         * @param {?} performSelect
         * @return {?}
         */
        NzCascaderComponent.prototype.delaySetOptionActivated = function (option, columnIndex, performSelect) {
            var _this = this;
            this.clearDelaySelectTimer();
            this.delaySelectTimer = setTimeout(( /**
             * @return {?}
             */function () {
                _this.cascaderService.setOptionActivated(option, columnIndex, performSelect);
                _this.delaySelectTimer = null;
            }), 150);
        };
        /**
         * @private
         * @param {?} toSearching
         * @return {?}
         */
        NzCascaderComponent.prototype.toggleSearchingMode = function (toSearching) {
            if (this.inSearchingMode !== toSearching) {
                this.cascaderService.toggleSearchingMode(toSearching);
            }
            if (this.inSearchingMode) {
                this.cascaderService.prepareSearchOptions(this.inputValue);
            }
        };
        /**
         * @param {?} option
         * @param {?} index
         * @return {?}
         */
        NzCascaderComponent.prototype.isOptionActivated = function (option, index) {
            /** @type {?} */
            var activeOpt = this.cascaderService.activatedOptions[index];
            return activeOpt === option;
        };
        /**
         * @param {?} isDisabled
         * @return {?}
         */
        NzCascaderComponent.prototype.setDisabledState = function (isDisabled) {
            if (isDisabled) {
                this.closeMenu();
            }
            this.nzDisabled = isDisabled;
        };
        /**
         * @return {?}
         */
        NzCascaderComponent.prototype.closeMenu = function () {
            this.blur();
            this.clearDelayMenuTimer();
            this.setMenuVisible(false);
        };
        /**
         * Reposition the cascader panel. When a menu opens, the cascader expands
         * and may exceed the boundary of browser's window.
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.reposition = function () {
            var _this = this;
            if (this.overlay && this.overlay.overlayRef && this.menuVisible) {
                Promise.resolve().then(( /**
                 * @return {?}
                 */function () {
                    _this.overlay.overlayRef.updatePosition();
                }));
            }
        };
        /**
         * When a cascader options is changed, a child needs to know that it should re-render.
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.checkChildren = function () {
            if (this.cascaderItems) {
                this.cascaderItems.forEach(( /**
                 * @param {?} item
                 * @return {?}
                 */function (/**
                 * @param {?} item
                 * @return {?}
                 */ item) { return item.markForCheck(); }));
            }
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.setDisplayLabel = function () {
            var _this = this;
            /** @type {?} */
            var selectedOptions = this.cascaderService.selectedOptions;
            /** @type {?} */
            var labels = selectedOptions.map(( /**
             * @param {?} o
             * @return {?}
             */function (/**
             * @param {?} o
             * @return {?}
             */ o) { return _this.cascaderService.getOptionLabel(o); }));
            if (this.isLabelRenderTemplate) {
                this.labelRenderContext = { labels: labels, selectedOptions: selectedOptions };
            }
            else {
                this.labelRenderText = defaultDisplayRender.call(this, labels, selectedOptions);
            }
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.setDropdownStyles = function () {
            /** @type {?} */
            var firstColumn = this.cascaderService.columns[0];
            this.shouldShowEmpty =
                (this.inSearchingMode && (!firstColumn || !firstColumn.length)) || // Should show empty when there's no searching result
                    (!(this.nzOptions && this.nzOptions.length) && !this.nzLoadData); // Should show when there's no options and developer does not use nzLoadData
            this.dropdownHeightStyle = this.shouldShowEmpty ? 'auto' : '';
            if (this.input) {
                this.dropdownWidthStyle = this.inSearchingMode || this.shouldShowEmpty ? this.input.nativeElement.offsetWidth + "px" : '';
            }
        };
        /**
         * @private
         * @return {?}
         */
        NzCascaderComponent.prototype.setLocale = function () {
            this.locale = this.i18nService.getLocaleData('global');
            this.cdr.markForCheck();
        };
        return NzCascaderComponent;
    }());
    NzCascaderComponent.decorators = [
        { type: core.Component, args: [{
                    changeDetection: core.ChangeDetectionStrategy.OnPush,
                    encapsulation: core.ViewEncapsulation.None,
                    selector: 'nz-cascader, [nz-cascader]',
                    exportAs: 'nzCascader',
                    preserveWhitespaces: false,
                    template: "\n    <div cdkOverlayOrigin #origin=\"cdkOverlayOrigin\" #trigger>\n      <div *ngIf=\"nzShowInput\">\n        <input\n          #input\n          nz-input\n          class=\"ant-cascader-input\"\n          [class.ant-cascader-input-disabled]=\"nzDisabled\"\n          [class.ant-cascader-input-lg]=\"nzSize === 'large'\"\n          [class.ant-cascader-input-sm]=\"nzSize === 'small'\"\n          [attr.autoComplete]=\"'off'\"\n          [attr.placeholder]=\"showPlaceholder ? nzPlaceHolder || locale?.placeholder : null\"\n          [attr.autofocus]=\"nzAutoFocus ? 'autofocus' : null\"\n          [readonly]=\"!nzShowSearch\"\n          [disabled]=\"nzDisabled\"\n          [nzSize]=\"nzSize\"\n          [(ngModel)]=\"inputValue\"\n          (blur)=\"handleInputBlur()\"\n          (focus)=\"handleInputFocus()\"\n          (change)=\"$event.stopPropagation()\"\n        />\n        <i\n          *ngIf=\"clearIconVisible\"\n          nz-icon\n          nzType=\"close-circle\"\n          nzTheme=\"fill\"\n          class=\"ant-cascader-picker-clear\"\n          (click)=\"clearSelection($event)\"\n        ></i>\n        <i\n          *ngIf=\"nzShowArrow && !isLoading\"\n          nz-icon\n          nzType=\"down\"\n          class=\"ant-cascader-picker-arrow\"\n          [class.ant-cascader-picker-arrow-expand]=\"menuVisible\"\n        >\n        </i>\n        <i *ngIf=\"isLoading\" nz-icon nzType=\"loading\" class=\"ant-cascader-picker-arrow\"></i>\n        <span\n          class=\"ant-cascader-picker-label\"\n          [class.ant-cascader-show-search]=\"!!nzShowSearch\"\n          [class.ant-focusd]=\"!!nzShowSearch && isFocused && !inputValue\"\n        >\n          <ng-container *ngIf=\"!isLabelRenderTemplate; else labelTemplate\">{{ labelRenderText }}</ng-container>\n          <ng-template #labelTemplate>\n            <ng-template [ngTemplateOutlet]=\"nzLabelRender\" [ngTemplateOutletContext]=\"labelRenderContext\"></ng-template>\n          </ng-template>\n        </span>\n      </div>\n      <ng-content></ng-content>\n    </div>\n    <ng-template\n      cdkConnectedOverlay\n      nzConnectedOverlay\n      cdkConnectedOverlayHasBackdrop\n      [cdkConnectedOverlayOrigin]=\"origin\"\n      [cdkConnectedOverlayPositions]=\"positions\"\n      [cdkConnectedOverlayTransformOriginOn]=\"'.ant-cascader-menus'\"\n      (backdropClick)=\"closeMenu()\"\n      (detach)=\"closeMenu()\"\n      [cdkConnectedOverlayOpen]=\"menuVisible\"\n    >\n      <div\n        #menu\n        class=\"ant-cascader-menus\"\n        [class.ant-cascader-menus-hidden]=\"!menuVisible\"\n        [ngClass]=\"menuCls\"\n        [ngStyle]=\"nzMenuStyle\"\n        [@.disabled]=\"noAnimation?.nzNoAnimation\"\n        [nzNoAnimation]=\"noAnimation?.nzNoAnimation\"\n        [@slideMotion]=\"'enter'\"\n        (mouseleave)=\"onTriggerMouseLeave($event)\"\n      >\n        <ul\n          *ngIf=\"shouldShowEmpty; else hasOptionsTemplate\"\n          class=\"ant-cascader-menu\"\n          [style.width]=\"dropdownWidthStyle\"\n          [style.height]=\"dropdownHeightStyle\"\n        >\n          <li class=\"ant-cascader-menu-item ant-cascader-menu-item-expanded ant-cascader-menu-item-disabled\">\n            <nz-embed-empty [nzComponentName]=\"'cascader'\" [specificContent]=\"nzNotFoundContent\"></nz-embed-empty>\n          </li>\n        </ul>\n        <ng-template #hasOptionsTemplate>\n          <ul\n            *ngFor=\"let options of cascaderService.columns; let i = index\"\n            class=\"ant-cascader-menu\"\n            [ngClass]=\"menuColumnCls\"\n            [style.height]=\"dropdownHeightStyle\"\n            [style.width]=\"dropdownWidthStyle\"\n          >\n            <li\n              nz-cascader-option\n              *ngFor=\"let option of options\"\n              [columnIndex]=\"i\"\n              [nzLabelProperty]=\"nzLabelProperty\"\n              [optionTemplate]=\"nzOptionRender\"\n              [activated]=\"isOptionActivated(option, i)\"\n              [highlightText]=\"inSearchingMode ? inputValue : ''\"\n              [option]=\"option\"\n              (mouseenter)=\"onOptionMouseEnter(option, i, $event)\"\n              (mouseleave)=\"onOptionMouseLeave(option, i, $event)\"\n              (click)=\"onOptionClick(option, i, $event)\"\n            ></li>\n          </ul>\n        </ng-template>\n      </div>\n    </ng-template>\n  ",
                    animations: [animation.slideMotion],
                    providers: [
                        {
                            provide: forms.NG_VALUE_ACCESSOR,
                            useExisting: core.forwardRef(( /**
                             * @return {?}
                             */function () { return NzCascaderComponent; })),
                            multi: true
                        },
                        NzCascaderService
                    ],
                    host: {
                        '[attr.tabIndex]': '"0"',
                        '[class.ant-cascader-lg]': 'nzSize === "large"',
                        '[class.ant-cascader-sm]': 'nzSize === "small"',
                        '[class.ant-cascader-picker-disabled]': 'nzDisabled',
                        '[class.ant-cascader-picker-open]': 'menuVisible',
                        '[class.ant-cascader-picker-with-value]': '!!inputValue',
                        '[class.ant-cascader-focused]': 'isFocused'
                    }
                }] }
    ];
    /** @nocollapse */
    NzCascaderComponent.ctorParameters = function () { return [
        { type: NzCascaderService },
        { type: i18n.NzI18nService },
        { type: config.NzConfigService },
        { type: core.ChangeDetectorRef },
        { type: core.ElementRef },
        { type: core.Renderer2 },
        { type: noAnimation.NzNoAnimationDirective, decorators: [{ type: core.Host }, { type: core.Optional }] }
    ]; };
    NzCascaderComponent.propDecorators = {
        input: [{ type: core.ViewChild, args: ['input', { static: false },] }],
        menu: [{ type: core.ViewChild, args: ['menu', { static: false },] }],
        overlay: [{ type: core.ViewChild, args: [overlay.CdkConnectedOverlay, { static: false },] }],
        cascaderItems: [{ type: core.ViewChildren, args: [NzCascaderOptionComponent,] }],
        nzOptionRender: [{ type: core.Input }],
        nzShowInput: [{ type: core.Input }],
        nzShowArrow: [{ type: core.Input }],
        nzAllowClear: [{ type: core.Input }],
        nzAutoFocus: [{ type: core.Input }],
        nzChangeOnSelect: [{ type: core.Input }],
        nzDisabled: [{ type: core.Input }],
        nzColumnClassName: [{ type: core.Input }],
        nzExpandTrigger: [{ type: core.Input }],
        nzValueProperty: [{ type: core.Input }],
        nzLabelRender: [{ type: core.Input }],
        nzLabelProperty: [{ type: core.Input }],
        nzNotFoundContent: [{ type: core.Input }],
        nzSize: [{ type: core.Input }],
        nzShowSearch: [{ type: core.Input }],
        nzPlaceHolder: [{ type: core.Input }],
        nzMenuClassName: [{ type: core.Input }],
        nzMenuStyle: [{ type: core.Input }],
        nzMouseEnterDelay: [{ type: core.Input }],
        nzMouseLeaveDelay: [{ type: core.Input }],
        nzTriggerAction: [{ type: core.Input }],
        nzChangeOn: [{ type: core.Input }],
        nzLoadData: [{ type: core.Input }],
        nzOptions: [{ type: core.Input }],
        nzVisibleChange: [{ type: core.Output }],
        nzSelectionChange: [{ type: core.Output }],
        nzSelect: [{ type: core.Output }],
        nzClear: [{ type: core.Output }],
        onKeyDown: [{ type: core.HostListener, args: ['keydown', ['$event'],] }],
        onTriggerClick: [{ type: core.HostListener, args: ['click',] }],
        onTriggerMouseEnter: [{ type: core.HostListener, args: ['mouseenter',] }],
        onTriggerMouseLeave: [{ type: core.HostListener, args: ['mouseleave', ['$event'],] }]
    };
    __decorate([
        util.InputBoolean(),
        __metadata("design:type", Object)
    ], NzCascaderComponent.prototype, "nzShowInput", void 0);
    __decorate([
        util.InputBoolean(),
        __metadata("design:type", Object)
    ], NzCascaderComponent.prototype, "nzShowArrow", void 0);
    __decorate([
        util.InputBoolean(),
        __metadata("design:type", Object)
    ], NzCascaderComponent.prototype, "nzAllowClear", void 0);
    __decorate([
        util.InputBoolean(),
        __metadata("design:type", Object)
    ], NzCascaderComponent.prototype, "nzAutoFocus", void 0);
    __decorate([
        util.InputBoolean(),
        __metadata("design:type", Object)
    ], NzCascaderComponent.prototype, "nzChangeOnSelect", void 0);
    __decorate([
        util.InputBoolean(),
        __metadata("design:type", Object)
    ], NzCascaderComponent.prototype, "nzDisabled", void 0);
    __decorate([
        config.WithConfig(NZ_CONFIG_COMPONENT_NAME),
        __metadata("design:type", String)
    ], NzCascaderComponent.prototype, "nzSize", void 0);
    if (false) {
        /** @type {?} */
        NzCascaderComponent.ngAcceptInputType_nzShowInput;
        /** @type {?} */
        NzCascaderComponent.ngAcceptInputType_nzShowArrow;
        /** @type {?} */
        NzCascaderComponent.ngAcceptInputType_nzAllowClear;
        /** @type {?} */
        NzCascaderComponent.ngAcceptInputType_nzAutoFocus;
        /** @type {?} */
        NzCascaderComponent.ngAcceptInputType_nzChangeOnSelect;
        /** @type {?} */
        NzCascaderComponent.ngAcceptInputType_nzDisabled;
        /** @type {?} */
        NzCascaderComponent.prototype.input;
        /** @type {?} */
        NzCascaderComponent.prototype.menu;
        /** @type {?} */
        NzCascaderComponent.prototype.overlay;
        /** @type {?} */
        NzCascaderComponent.prototype.cascaderItems;
        /** @type {?} */
        NzCascaderComponent.prototype.nzOptionRender;
        /** @type {?} */
        NzCascaderComponent.prototype.nzShowInput;
        /** @type {?} */
        NzCascaderComponent.prototype.nzShowArrow;
        /** @type {?} */
        NzCascaderComponent.prototype.nzAllowClear;
        /** @type {?} */
        NzCascaderComponent.prototype.nzAutoFocus;
        /** @type {?} */
        NzCascaderComponent.prototype.nzChangeOnSelect;
        /** @type {?} */
        NzCascaderComponent.prototype.nzDisabled;
        /** @type {?} */
        NzCascaderComponent.prototype.nzColumnClassName;
        /** @type {?} */
        NzCascaderComponent.prototype.nzExpandTrigger;
        /** @type {?} */
        NzCascaderComponent.prototype.nzValueProperty;
        /** @type {?} */
        NzCascaderComponent.prototype.nzLabelRender;
        /** @type {?} */
        NzCascaderComponent.prototype.nzLabelProperty;
        /** @type {?} */
        NzCascaderComponent.prototype.nzNotFoundContent;
        /** @type {?} */
        NzCascaderComponent.prototype.nzSize;
        /** @type {?} */
        NzCascaderComponent.prototype.nzShowSearch;
        /** @type {?} */
        NzCascaderComponent.prototype.nzPlaceHolder;
        /** @type {?} */
        NzCascaderComponent.prototype.nzMenuClassName;
        /** @type {?} */
        NzCascaderComponent.prototype.nzMenuStyle;
        /** @type {?} */
        NzCascaderComponent.prototype.nzMouseEnterDelay;
        /** @type {?} */
        NzCascaderComponent.prototype.nzMouseLeaveDelay;
        /** @type {?} */
        NzCascaderComponent.prototype.nzTriggerAction;
        /** @type {?} */
        NzCascaderComponent.prototype.nzChangeOn;
        /** @type {?} */
        NzCascaderComponent.prototype.nzLoadData;
        /** @type {?} */
        NzCascaderComponent.prototype.nzVisibleChange;
        /** @type {?} */
        NzCascaderComponent.prototype.nzSelectionChange;
        /** @type {?} */
        NzCascaderComponent.prototype.nzSelect;
        /** @type {?} */
        NzCascaderComponent.prototype.nzClear;
        /**
         * If the dropdown should show the empty content.
         * `true` if there's no options.
         * @type {?}
         */
        NzCascaderComponent.prototype.shouldShowEmpty;
        /** @type {?} */
        NzCascaderComponent.prototype.el;
        /** @type {?} */
        NzCascaderComponent.prototype.menuVisible;
        /** @type {?} */
        NzCascaderComponent.prototype.isLoading;
        /** @type {?} */
        NzCascaderComponent.prototype.labelRenderText;
        /** @type {?} */
        NzCascaderComponent.prototype.labelRenderContext;
        /** @type {?} */
        NzCascaderComponent.prototype.onChange;
        /** @type {?} */
        NzCascaderComponent.prototype.onTouched;
        /** @type {?} */
        NzCascaderComponent.prototype.positions;
        /**
         * Dropdown's with in pixel.
         * @type {?}
         */
        NzCascaderComponent.prototype.dropdownWidthStyle;
        /** @type {?} */
        NzCascaderComponent.prototype.dropdownHeightStyle;
        /** @type {?} */
        NzCascaderComponent.prototype.isFocused;
        /** @type {?} */
        NzCascaderComponent.prototype.locale;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.destroy$;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.inputString;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.isOpening;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.delayMenuTimer;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.delaySelectTimer;
        /** @type {?} */
        NzCascaderComponent.prototype.cascaderService;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.i18nService;
        /** @type {?} */
        NzCascaderComponent.prototype.nzConfigService;
        /**
         * @type {?}
         * @private
         */
        NzCascaderComponent.prototype.cdr;
        /** @type {?} */
        NzCascaderComponent.prototype.noAnimation;
    }

    /**
     * @fileoverview added by tsickle
     * Generated from: cascader.module.ts
     * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
     */
    var NzCascaderModule = /** @class */ (function () {
        function NzCascaderModule() {
        }
        return NzCascaderModule;
    }());
    NzCascaderModule.decorators = [
        { type: core.NgModule, args: [{
                    imports: [
                        common.CommonModule,
                        forms.FormsModule,
                        overlay.OverlayModule,
                        outlet.NzOutletModule,
                        empty.NzEmptyModule,
                        highlight.NzHighlightModule,
                        icon.NzIconModule,
                        input.NzInputModule,
                        noAnimation.NzNoAnimationModule,
                        overlay$1.NzOverlayModule
                    ],
                    declarations: [NzCascaderComponent, NzCascaderOptionComponent],
                    exports: [NzCascaderComponent]
                },] }
    ];

    /**
     * @fileoverview added by tsickle
     * Generated from: public-api.ts
     * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
     */

    /**
     * @fileoverview added by tsickle
     * Generated from: ng-zorro-antd-cascader.ts
     * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
     */

    exports.NzCascaderComponent = NzCascaderComponent;
    exports.NzCascaderModule = NzCascaderModule;
    exports.NzCascaderOptionComponent = NzCascaderOptionComponent;
    exports.NzCascaderService = NzCascaderService;
    exports.isChildOption = isChildOption;
    exports.isParentOption = isParentOption;
    exports.isShowSearchObject = isShowSearchObject;

    Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=ng-zorro-antd-cascader.umd.js.map
