ng-zorro-antd/fesm2015/ng-zorro-antd-cascader.js

An enterprise-class UI components based on Ant Design and Angular

import { __decorate, __metadata } from 'tslib';
import { Directionality, BidiModule } from '@angular/cdk/bidi';
import { DOWN_ARROW, UP_ARROW, LEFT_ARROW, RIGHT_ARROW, ENTER, BACKSPACE, ESCAPE } from '@angular/cdk/keycodes';
import { CdkConnectedOverlay, OverlayModule } from '@angular/cdk/overlay';
import { Component, ChangeDetectionStrategy, ViewEncapsulation, ChangeDetectorRef, ElementRef, Renderer2, Input, Injectable, EventEmitter, forwardRef, Optional, Host, ViewChild, ViewChildren, Output, HostListener, NgModule } from '@angular/core';
import { NG_VALUE_ACCESSOR, FormsModule } from '@angular/forms';
import { slideMotion } from 'ng-zorro-antd/core/animation';
import { NzConfigService, WithConfig } from 'ng-zorro-antd/core/config';
import { NzNoAnimationDirective, NzNoAnimationModule } from 'ng-zorro-antd/core/no-animation';
import { DEFAULT_CASCADER_POSITIONS, NzOverlayModule } from 'ng-zorro-antd/core/overlay';
import { isNotNil, arraysEqual, toArray, InputBoolean } from 'ng-zorro-antd/core/util';
import { NzI18nService } from 'ng-zorro-antd/i18n';
import { BehaviorSubject, Subject } from 'rxjs';
import { takeUntil, startWith } from 'rxjs/operators';
import { CommonModule } from '@angular/common';
import { NzHighlightModule } from 'ng-zorro-antd/core/highlight';
import { NzOutletModule } from 'ng-zorro-antd/core/outlet';
import { NzEmptyModule } from 'ng-zorro-antd/empty';
import { NzIconModule } from 'ng-zorro-antd/icon';
import { NzInputModule } from 'ng-zorro-antd/input';

function isShowSearchObject(options) {
    return typeof options !== 'boolean';
}

/**
 * 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
 */
function isChildOption(o) {
    return o.isLeaf || !o.children || !o.children.length;
}
function isParentOption(o) {
    return !!o.children && !!o.children.length && !o.isLeaf;
}

/**
 * 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
 */
class NzCascaderOptionComponent {
    constructor(cdr, elementRef, renderer) {
        this.cdr = cdr;
        this.optionTemplate = null;
        this.activated = false;
        this.nzLabelProperty = 'label';
        this.expandIcon = '';
        this.dir = 'ltr';
        renderer.addClass(elementRef.nativeElement, 'ant-cascader-menu-item');
        this.nativeElement = elementRef.nativeElement;
    }
    ngOnInit() {
        if (this.expandIcon === '' && this.dir === 'rtl') {
            this.expandIcon = 'left';
        }
        else if (this.expandIcon === '') {
            this.expandIcon = 'right';
        }
    }
    get optionLabel() {
        return this.option[this.nzLabelProperty];
    }
    markForCheck() {
        this.cdr.markForCheck();
    }
}
NzCascaderOptionComponent.decorators = [
    { type: Component, args: [{
                changeDetection: ChangeDetectionStrategy.OnPush,
                encapsulation: ViewEncapsulation.None,
                selector: '[nz-cascader-option]',
                exportAs: 'nzCascaderOption',
                template: `
    <ng-container *ngIf="optionTemplate; else defaultOptionTemplate">
      <ng-template [ngTemplateOutlet]="optionTemplate" [ngTemplateOutletContext]="{ $implicit: option, index: columnIndex }"></ng-template>
    </ng-container>
    <ng-template #defaultOptionTemplate>
      <span [innerHTML]="optionLabel | nzHighlight: highlightText:'g':'ant-cascader-menu-item-keyword'"></span>
    </ng-template>
    <span *ngIf="!option.isLeaf || option.children?.length || option.loading" class="ant-cascader-menu-item-expand-icon">
      <i *ngIf="option.loading; else icon" nz-icon nzType="loading"></i>
      <ng-template #icon>
        <ng-container *nzStringTemplateOutlet="expandIcon">
          <i nz-icon [nzType]="$any(expandIcon)"></i>
        </ng-container>
      </ng-template>
    </span>
  `,
                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'
                }
            },] }
];
NzCascaderOptionComponent.ctorParameters = () => [
    { type: ChangeDetectorRef },
    { type: ElementRef },
    { type: Renderer2 }
];
NzCascaderOptionComponent.propDecorators = {
    optionTemplate: [{ type: Input }],
    option: [{ type: Input }],
    activated: [{ type: Input }],
    highlightText: [{ type: Input }],
    nzLabelProperty: [{ type: Input }],
    columnIndex: [{ type: Input }],
    expandIcon: [{ type: Input }],
    dir: [{ type: Input }]
};

/**
 * 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
 */
/**
 * All data is stored and parsed in NzCascaderService.
 */
class NzCascaderService {
    constructor() {
        /** 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.$loading = new BehaviorSubject(false);
        /**
         * Emit an event to notify cascader it needs to redraw because activated or
         * selected options are changed.
         */
        this.$redraw = new Subject();
        /**
         * Emit an event when an option gets selected.
         * Emit true if a leaf options is selected.
         */
        this.$optionSelected = new Subject();
        /**
         * Emit an event to notify cascader it needs to quit searching mode.
         * Only emit when user do select a searching option.
         */
        this.$quitSearching = new Subject();
        /** To hold columns before entering searching mode. */
        this.columnsSnapshot = [[]];
        /** To hold activated options before entering searching mode. */
        this.activatedOptionsSnapshot = [];
    }
    /** Return cascader options in the first layer. */
    get nzOptions() {
        return this.columns[0];
    }
    ngOnDestroy() {
        this.$redraw.complete();
        this.$quitSearching.complete();
        this.$optionSelected.complete();
        this.$loading.complete();
    }
    /**
     * Make sure that value matches what is displayed in the dropdown.
     */
    syncOptions(first = false) {
        const values = this.values;
        const hasValue = values && values.length;
        const lastColumnIndex = values.length - 1;
        const initColumnWithIndex = (columnIndex) => {
            const activatedOptionSetter = () => {
                const currentValue = values[columnIndex];
                if (!isNotNil(currentValue)) {
                    this.$redraw.next();
                    return;
                }
                const option = this.findOptionWithValue(columnIndex, values[columnIndex]) ||
                    (typeof currentValue === 'object'
                        ? currentValue
                        : {
                            [`${this.cascaderComponent.nzValueProperty}`]: currentValue,
                            [`${this.cascaderComponent.nzLabelProperty}`]: currentValue
                        });
                this.setOptionActivated(option, columnIndex, false, false);
                if (columnIndex < lastColumnIndex) {
                    initColumnWithIndex(columnIndex + 1);
                }
                else {
                    this.dropBehindColumns(columnIndex);
                    this.selectedOptions = [...this.activatedOptions];
                    this.$redraw.next();
                }
            };
            if (this.isLoaded(columnIndex) || !this.cascaderComponent.nzLoadData) {
                activatedOptionSetter();
            }
            else {
                const 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.
     */
    withComponent(cascaderComponent) {
        this.cascaderComponent = cascaderComponent;
    }
    /**
     * Reset all options. Rebuild searching options if in searching mode.
     */
    withOptions(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.
     */
    setOptionActivated(option, columnIndex, performSelect = false, loadingChildren = true) {
        if (option.disabled) {
            return;
        }
        this.activatedOptions[columnIndex] = option;
        this.trackAncestorActivatedOptions(columnIndex);
        this.dropBehindActivatedOptions(columnIndex);
        const isParent = isParentOption(option);
        if (isParent) {
            // Parent option that has children.
            this.setColumnData(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();
    }
    setOptionSelected(option, index) {
        const changeOn = this.cascaderComponent.nzChangeOn;
        const shouldPerformSelection = (o, i) => {
            return typeof changeOn === 'function' ? changeOn(o, i) : false;
        };
        if (option.isLeaf || this.cascaderComponent.nzChangeOnSelect || shouldPerformSelection(option, index)) {
            this.selectedOptions = [...this.activatedOptions];
            this.prepareEmitValue();
            this.$redraw.next();
            this.$optionSelected.next({ option, index });
        }
    }
    setOptionDeactivatedSinceColumn(column) {
        this.dropBehindActivatedOptions(column - 1);
        this.dropBehindColumns(column);
        this.$redraw.next();
    }
    /**
     * Set a searching option as selected, finishing up things.
     * @param option
     */
    setSearchOptionSelected(option) {
        this.activatedOptions = [option];
        this.selectedOptions = [...option.path];
        this.prepareEmitValue();
        this.$redraw.next();
        this.$optionSelected.next({ option, index: 0 });
        setTimeout(() => {
            // Reset data and tell UI only to remove input and reset dropdown width style.
            this.$quitSearching.next();
            this.$redraw.next();
            this.inSearchingMode = false;
            this.columns = [...this.columnsSnapshot];
            this.activatedOptions = [...this.selectedOptions];
        }, 200);
    }
    /**
     * Filter cascader options to reset `columns`.
     * @param searchValue The string user wants to search.
     */
    prepareSearchOptions(searchValue) {
        const results = []; // Search results only have one layer.
        const path = [];
        const defaultFilter = (i, p) => {
            return p.some(o => {
                const label = this.getOptionLabel(o);
                return !!label && label.indexOf(i) !== -1;
            });
        };
        const showSearch = this.cascaderComponent.nzShowSearch;
        const filter = isShowSearchObject(showSearch) && showSearch.filter ? showSearch.filter : defaultFilter;
        const sorter = isShowSearchObject(showSearch) && showSearch.sorter ? showSearch.sorter : null;
        const loopChild = (node, forceDisabled = false) => {
            path.push(node);
            const cPath = Array.from(path);
            if (filter(searchValue, cPath)) {
                const disabled = forceDisabled || node.disabled;
                const option = {
                    disabled,
                    isLeaf: true,
                    path: cPath,
                    [this.cascaderComponent.nzLabelProperty]: cPath.map(p => this.getOptionLabel(p)).join(' / ')
                };
                results.push(option);
            }
            path.pop();
        };
        const loopParent = (node, forceDisabled = false) => {
            const disabled = forceDisabled || node.disabled;
            path.push(node);
            node.children.forEach(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(o => (isChildOption(o) ? loopChild(o) : loopParent(o)));
        if (sorter) {
            results.sort((a, b) => 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
     */
    toggleSearchingMode(toSearching) {
        this.inSearchingMode = toSearching;
        if (toSearching) {
            this.activatedOptionsSnapshot = [...this.activatedOptions];
            this.activatedOptions = [];
            this.selectedOptions = [];
            this.$redraw.next();
        }
        else {
            // User quit searching mode without selecting an option.
            this.activatedOptions = [...this.activatedOptionsSnapshot];
            this.selectedOptions = [...this.activatedOptions];
            this.columns = [...this.columnsSnapshot];
            this.syncOptions();
            this.$redraw.next();
        }
    }
    /**
     * Clear selected options.
     */
    clear() {
        this.values = [];
        this.selectedOptions = [];
        this.activatedOptions = [];
        this.dropBehindColumns(0);
        this.prepareEmitValue();
        this.$redraw.next();
        this.$optionSelected.next(null);
    }
    getOptionLabel(o) {
        return o[this.cascaderComponent.nzLabelProperty || 'label'];
    }
    getOptionValue(o) {
        return o[this.cascaderComponent.nzValueProperty || 'value'];
    }
    /**
     * Try to insert options into a column.
     * @param options Options to insert
     * @param columnIndex Position
     */
    setColumnData(options, columnIndex, parent) {
        const existingOptions = this.columns[columnIndex];
        if (!arraysEqual(existingOptions, options)) {
            options.forEach(o => (o.parent = parent));
            this.columns[columnIndex] = options;
            this.dropBehindColumns(columnIndex);
        }
    }
    /**
     * Set all ancestor options as activated.
     */
    trackAncestorActivatedOptions(startIndex) {
        for (let i = startIndex - 1; i >= 0; i--) {
            if (!this.activatedOptions[i]) {
                this.activatedOptions[i] = this.activatedOptions[i + 1].parent;
            }
        }
    }
    dropBehindActivatedOptions(lastReserveIndex) {
        this.activatedOptions = this.activatedOptions.splice(0, lastReserveIndex + 1);
    }
    dropBehindColumns(lastReserveIndex) {
        if (lastReserveIndex < this.columns.length - 1) {
            this.columns = this.columns.slice(0, lastReserveIndex + 1);
        }
    }
    /**
     * Load children of an option asynchronously.
     */
    loadChildren(option, columnIndex, success, failure) {
        const loadFn = this.cascaderComponent.nzLoadData;
        if (loadFn) {
            // If there isn't any option in columns.
            this.$loading.next(columnIndex < 0);
            if (typeof option === 'object') {
                option.loading = true;
            }
            loadFn(option, columnIndex).then(() => {
                option.loading = false;
                if (option.children) {
                    this.setColumnData(option.children, columnIndex + 1, option);
                }
                if (success) {
                    success();
                }
                this.$loading.next(false);
                this.$redraw.next();
            }, () => {
                option.loading = false;
                option.isLeaf = true;
                if (failure) {
                    failure();
                }
                this.$redraw.next();
            });
        }
    }
    isLoaded(index) {
        return this.columns[index] && this.columns[index].length > 0;
    }
    /**
     * Find a option that has a given value in a given column.
     */
    findOptionWithValue(columnIndex, value) {
        const targetColumn = this.columns[columnIndex];
        if (targetColumn) {
            const v = typeof value === 'object' ? this.getOptionValue(value) : value;
            return targetColumn.find(o => v === this.getOptionValue(o));
        }
        return null;
    }
    prepareEmitValue() {
        this.values = this.selectedOptions.map(o => this.getOptionValue(o));
    }
}
NzCascaderService.decorators = [
    { type: Injectable }
];

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

/**
 * 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
 */
class NzCascaderModule {
}
NzCascaderModule.decorators = [
    { type: NgModule, args: [{
                imports: [
                    BidiModule,
                    CommonModule,
                    FormsModule,
                    OverlayModule,
                    NzOutletModule,
                    NzEmptyModule,
                    NzHighlightModule,
                    NzIconModule,
                    NzInputModule,
                    NzNoAnimationModule,
                    NzOverlayModule
                ],
                declarations: [NzCascaderComponent, NzCascaderOptionComponent],
                exports: [NzCascaderComponent]
            },] }
];

/**
 * 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
 */

/**
 * Generated bundle index. Do not edit.
 */

export { NzCascaderComponent, NzCascaderModule, NzCascaderOptionComponent, NzCascaderService, isChildOption, isParentOption, isShowSearchObject, ɵ0 };
//# sourceMappingURL=ng-zorro-antd-cascader.js.map