source: trip-planner-front/node_modules/@angular/material/fesm2015/chips.js@ 6c1585f

import { SPACE, BACKSPACE, DELETE, TAB, hasModifierKey, ENTER } from '@angular/cdk/keycodes';
import { InjectionToken, Directive, EventEmitter, ElementRef, NgZone, Optional, Inject, ChangeDetectorRef, Attribute, ContentChild, Input, Output, Component, ViewEncapsulation, ChangeDetectionStrategy, Self, ContentChildren, NgModule } from '@angular/core';
import { mixinTabIndex, mixinColor, mixinDisableRipple, RippleRenderer, MAT_RIPPLE_GLOBAL_OPTIONS, mixinErrorState, ErrorStateMatcher, MatCommonModule } from '@angular/material/core';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { Platform } from '@angular/cdk/platform';
import { DOCUMENT } from '@angular/common';
import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';
import { Subject, merge } from 'rxjs';
import { take, takeUntil, startWith } from 'rxjs/operators';
import { FocusKeyManager } from '@angular/cdk/a11y';
import { Directionality } from '@angular/cdk/bidi';
import { SelectionModel } from '@angular/cdk/collections';
import { NgForm, FormGroupDirective, NgControl } from '@angular/forms';
import { MatFormFieldControl } from '@angular/material/form-field';

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/** Event object emitted by MatChip when selected or deselected. */
class MatChipSelectionChange {
    constructor(
    /** Reference to the chip that emitted the event. */
    source, 
    /** Whether the chip that emitted the event is selected. */
    selected, 
    /** Whether the selection change was a result of a user interaction. */
    isUserInput = false) {
        this.source = source;
        this.selected = selected;
        this.isUserInput = isUserInput;
    }
}
/**
 * Injection token that can be used to reference instances of `MatChipRemove`. It serves as
 * alternative token to the actual `MatChipRemove` class which could cause unnecessary
 * retention of the class and its directive metadata.
 */
const MAT_CHIP_REMOVE = new InjectionToken('MatChipRemove');
/**
 * Injection token that can be used to reference instances of `MatChipAvatar`. It serves as
 * alternative token to the actual `MatChipAvatar` class which could cause unnecessary
 * retention of the class and its directive metadata.
 */
const MAT_CHIP_AVATAR = new InjectionToken('MatChipAvatar');
/**
 * Injection token that can be used to reference instances of `MatChipTrailingIcon`. It serves as
 * alternative token to the actual `MatChipTrailingIcon` class which could cause unnecessary
 * retention of the class and its directive metadata.
 */
const MAT_CHIP_TRAILING_ICON = new InjectionToken('MatChipTrailingIcon');
// Boilerplate for applying mixins to MatChip.
/** @docs-private */
class MatChipBase {
    constructor(_elementRef) {
        this._elementRef = _elementRef;
    }
}
const _MatChipMixinBase = mixinTabIndex(mixinColor(mixinDisableRipple(MatChipBase), 'primary'), -1);
/**
 * Dummy directive to add CSS class to chip avatar.
 * @docs-private
 */
class MatChipAvatar {
}
MatChipAvatar.decorators = [
    { type: Directive, args: [{
                selector: 'mat-chip-avatar, [matChipAvatar]',
                host: { 'class': 'mat-chip-avatar' },
                providers: [{ provide: MAT_CHIP_AVATAR, useExisting: MatChipAvatar }]
            },] }
];
/**
 * Dummy directive to add CSS class to chip trailing icon.
 * @docs-private
 */
class MatChipTrailingIcon {
}
MatChipTrailingIcon.decorators = [
    { type: Directive, args: [{
                selector: 'mat-chip-trailing-icon, [matChipTrailingIcon]',
                host: { 'class': 'mat-chip-trailing-icon' },
                providers: [{ provide: MAT_CHIP_TRAILING_ICON, useExisting: MatChipTrailingIcon }],
            },] }
];
/**
 * Material design styled Chip component. Used inside the MatChipList component.
 */
class MatChip extends _MatChipMixinBase {
    constructor(elementRef, _ngZone, platform, globalRippleOptions, _changeDetectorRef, _document, animationMode, tabIndex) {
        super(elementRef);
        this._ngZone = _ngZone;
        this._changeDetectorRef = _changeDetectorRef;
        /** Whether the chip has focus. */
        this._hasFocus = false;
        /** Whether the chip list is selectable */
        this.chipListSelectable = true;
        /** Whether the chip list is in multi-selection mode. */
        this._chipListMultiple = false;
        /** Whether the chip list as a whole is disabled. */
        this._chipListDisabled = false;
        this._selected = false;
        this._selectable = true;
        this._disabled = false;
        this._removable = true;
        /** Emits when the chip is focused. */
        this._onFocus = new Subject();
        /** Emits when the chip is blured. */
        this._onBlur = new Subject();
        /** Emitted when the chip is selected or deselected. */
        this.selectionChange = new EventEmitter();
        /** Emitted when the chip is destroyed. */
        this.destroyed = new EventEmitter();
        /** Emitted when a chip is to be removed. */
        this.removed = new EventEmitter();
        this._addHostClassName();
        // Dynamically create the ripple target, append it within the chip, and use it as the
        // chip's ripple target. Adding the class '.mat-chip-ripple' ensures that it will have
        // the proper styles.
        this._chipRippleTarget = _document.createElement('div');
        this._chipRippleTarget.classList.add('mat-chip-ripple');
        this._elementRef.nativeElement.appendChild(this._chipRippleTarget);
        this._chipRipple = new RippleRenderer(this, _ngZone, this._chipRippleTarget, platform);
        this._chipRipple.setupTriggerEvents(elementRef);
        this.rippleConfig = globalRippleOptions || {};
        this._animationsDisabled = animationMode === 'NoopAnimations';
        this.tabIndex = tabIndex != null ? (parseInt(tabIndex) || -1) : -1;
    }
    /**
     * Whether ripples are disabled on interaction
     * @docs-private
     */
    get rippleDisabled() {
        return this.disabled || this.disableRipple || this._animationsDisabled ||
            !!this.rippleConfig.disabled;
    }
    /** Whether the chip is selected. */
    get selected() { return this._selected; }
    set selected(value) {
        const coercedValue = coerceBooleanProperty(value);
        if (coercedValue !== this._selected) {
            this._selected = coercedValue;
            this._dispatchSelectionChange();
        }
    }
    /** The value of the chip. Defaults to the content inside `<mat-chip>` tags. */
    get value() {
        return this._value !== undefined
            ? this._value
            : this._elementRef.nativeElement.textContent;
    }
    set value(value) { this._value = value; }
    /**
     * Whether or not the chip is selectable. When a chip is not selectable,
     * changes to its selected state are always ignored. By default a chip is
     * selectable, and it becomes non-selectable if its parent chip list is
     * not selectable.
     */
    get selectable() { return this._selectable && this.chipListSelectable; }
    set selectable(value) {
        this._selectable = coerceBooleanProperty(value);
    }
    /** Whether the chip is disabled. */
    get disabled() { return this._chipListDisabled || this._disabled; }
    set disabled(value) {
        this._disabled = coerceBooleanProperty(value);
    }
    /**
     * Determines whether or not the chip displays the remove styling and emits (removed) events.
     */
    get removable() { return this._removable; }
    set removable(value) {
        this._removable = coerceBooleanProperty(value);
    }
    /** The ARIA selected applied to the chip. */
    get ariaSelected() {
        // Remove the `aria-selected` when the chip is deselected in single-selection mode, because
        // it adds noise to NVDA users where "not selected" will be read out for each chip.
        return this.selectable && (this._chipListMultiple || this.selected) ?
            this.selected.toString() : null;
    }
    _addHostClassName() {
        const basicChipAttrName = 'mat-basic-chip';
        const element = this._elementRef.nativeElement;
        if (element.hasAttribute(basicChipAttrName) ||
            element.tagName.toLowerCase() === basicChipAttrName) {
            element.classList.add(basicChipAttrName);
            return;
        }
        else {
            element.classList.add('mat-standard-chip');
        }
    }
    ngOnDestroy() {
        this.destroyed.emit({ chip: this });
        this._chipRipple._removeTriggerEvents();
    }
    /** Selects the chip. */
    select() {
        if (!this._selected) {
            this._selected = true;
            this._dispatchSelectionChange();
            this._changeDetectorRef.markForCheck();
        }
    }
    /** Deselects the chip. */
    deselect() {
        if (this._selected) {
            this._selected = false;
            this._dispatchSelectionChange();
            this._changeDetectorRef.markForCheck();
        }
    }
    /** Select this chip and emit selected event */
    selectViaInteraction() {
        if (!this._selected) {
            this._selected = true;
            this._dispatchSelectionChange(true);
            this._changeDetectorRef.markForCheck();
        }
    }
    /** Toggles the current selected state of this chip. */
    toggleSelected(isUserInput = false) {
        this._selected = !this.selected;
        this._dispatchSelectionChange(isUserInput);
        this._changeDetectorRef.markForCheck();
        return this.selected;
    }
    /** Allows for programmatic focusing of the chip. */
    focus() {
        if (!this._hasFocus) {
            this._elementRef.nativeElement.focus();
            this._onFocus.next({ chip: this });
        }
        this._hasFocus = true;
    }
    /**
     * Allows for programmatic removal of the chip. Called by the MatChipList when the DELETE or
     * BACKSPACE keys are pressed.
     *
     * Informs any listeners of the removal request. Does not remove the chip from the DOM.
     */
    remove() {
        if (this.removable) {
            this.removed.emit({ chip: this });
        }
    }
    /** Handles click events on the chip. */
    _handleClick(event) {
        if (this.disabled) {
            event.preventDefault();
        }
        else {
            event.stopPropagation();
        }
    }
    /** Handle custom key presses. */
    _handleKeydown(event) {
        if (this.disabled) {
            return;
        }
        switch (event.keyCode) {
            case DELETE:
            case BACKSPACE:
                // If we are removable, remove the focused chip
                this.remove();
                // Always prevent so page navigation does not occur
                event.preventDefault();
                break;
            case SPACE:
                // If we are selectable, toggle the focused chip
                if (this.selectable) {
                    this.toggleSelected(true);
                }
                // Always prevent space from scrolling the page since the list has focus
                event.preventDefault();
                break;
        }
    }
    _blur() {
        // When animations are enabled, Angular may end up removing the chip from the DOM a little
        // earlier than usual, causing it to be blurred and throwing off the logic in the chip list
        // that moves focus not the next item. To work around the issue, we defer marking the chip
        // as not focused until the next time the zone stabilizes.
        this._ngZone.onStable
            .pipe(take(1))
            .subscribe(() => {
            this._ngZone.run(() => {
                this._hasFocus = false;
                this._onBlur.next({ chip: this });
            });
        });
    }
    _dispatchSelectionChange(isUserInput = false) {
        this.selectionChange.emit({
            source: this,
            isUserInput,
            selected: this._selected
        });
    }
}
MatChip.decorators = [
    { type: Directive, args: [{
                selector: `mat-basic-chip, [mat-basic-chip], mat-chip, [mat-chip]`,
                inputs: ['color', 'disableRipple', 'tabIndex'],
                exportAs: 'matChip',
                host: {
                    'class': 'mat-chip mat-focus-indicator',
                    '[attr.tabindex]': 'disabled ? null : tabIndex',
                    'role': 'option',
                    '[class.mat-chip-selected]': 'selected',
                    '[class.mat-chip-with-avatar]': 'avatar',
                    '[class.mat-chip-with-trailing-icon]': 'trailingIcon || removeIcon',
                    '[class.mat-chip-disabled]': 'disabled',
                    '[class._mat-animation-noopable]': '_animationsDisabled',
                    '[attr.disabled]': 'disabled || null',
                    '[attr.aria-disabled]': 'disabled.toString()',
                    '[attr.aria-selected]': 'ariaSelected',
                    '(click)': '_handleClick($event)',
                    '(keydown)': '_handleKeydown($event)',
                    '(focus)': 'focus()',
                    '(blur)': '_blur()',
                },
            },] }
];
MatChip.ctorParameters = () => [
    { type: ElementRef },
    { type: NgZone },
    { type: Platform },
    { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_RIPPLE_GLOBAL_OPTIONS,] }] },
    { type: ChangeDetectorRef },
    { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] },
    { type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] },
    { type: String, decorators: [{ type: Attribute, args: ['tabindex',] }] }
];
MatChip.propDecorators = {
    avatar: [{ type: ContentChild, args: [MAT_CHIP_AVATAR,] }],
    trailingIcon: [{ type: ContentChild, args: [MAT_CHIP_TRAILING_ICON,] }],
    removeIcon: [{ type: ContentChild, args: [MAT_CHIP_REMOVE,] }],
    selected: [{ type: Input }],
    value: [{ type: Input }],
    selectable: [{ type: Input }],
    disabled: [{ type: Input }],
    removable: [{ type: Input }],
    selectionChange: [{ type: Output }],
    destroyed: [{ type: Output }],
    removed: [{ type: Output }]
};
/**
 * Applies proper (click) support and adds styling for use with the Material Design "cancel" icon
 * available at https://material.io/icons/#ic_cancel.
 *
 * Example:
 *
 *     `<mat-chip>
 *       <mat-icon matChipRemove>cancel</mat-icon>
 *     </mat-chip>`
 *
 * You *may* use a custom icon, but you may need to override the `mat-chip-remove` positioning
 * styles to properly center the icon within the chip.
 */
class MatChipRemove {
    constructor(_parentChip, elementRef) {
        this._parentChip = _parentChip;
        if (elementRef.nativeElement.nodeName === 'BUTTON') {
            elementRef.nativeElement.setAttribute('type', 'button');
        }
    }
    /** Calls the parent chip's public `remove()` method if applicable. */
    _handleClick(event) {
        const parentChip = this._parentChip;
        if (parentChip.removable && !parentChip.disabled) {
            parentChip.remove();
        }
        // We need to stop event propagation because otherwise the event will bubble up to the
        // form field and cause the `onContainerClick` method to be invoked. This method would then
        // reset the focused chip that has been focused after chip removal. Usually the parent
        // the parent click listener of the `MatChip` would prevent propagation, but it can happen
        // that the chip is being removed before the event bubbles up.
        event.stopPropagation();
    }
}
MatChipRemove.decorators = [
    { type: Directive, args: [{
                selector: '[matChipRemove]',
                host: {
                    'class': 'mat-chip-remove mat-chip-trailing-icon',
                    '(click)': '_handleClick($event)',
                },
                providers: [{ provide: MAT_CHIP_REMOVE, useExisting: MatChipRemove }],
            },] }
];
MatChipRemove.ctorParameters = () => [
    { type: MatChip },
    { type: ElementRef }
];

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/** Injection token to be used to override the default options for the chips module. */
const MAT_CHIPS_DEFAULT_OPTIONS = new InjectionToken('mat-chips-default-options');

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
// Boilerplate for applying mixins to MatChipList.
/** @docs-private */
const _MatChipListBase = mixinErrorState(class {
    constructor(_defaultErrorStateMatcher, _parentForm, _parentFormGroup, 
    /** @docs-private */
    ngControl) {
        this._defaultErrorStateMatcher = _defaultErrorStateMatcher;
        this._parentForm = _parentForm;
        this._parentFormGroup = _parentFormGroup;
        this.ngControl = ngControl;
    }
});
// Increasing integer for generating unique ids for chip-list components.
let nextUniqueId$1 = 0;
/** Change event object that is emitted when the chip list value has changed. */
class MatChipListChange {
    constructor(
    /** Chip list that emitted the event. */
    source, 
    /** Value of the chip list when the event was emitted. */
    value) {
        this.source = source;
        this.value = value;
    }
}
/**
 * A material design chips component (named ChipList for its similarity to the List component).
 */
class MatChipList extends _MatChipListBase {
    constructor(_elementRef, _changeDetectorRef, _dir, _parentForm, _parentFormGroup, _defaultErrorStateMatcher, ngControl) {
        super(_defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl);
        this._elementRef = _elementRef;
        this._changeDetectorRef = _changeDetectorRef;
        this._dir = _dir;
        /**
         * Implemented as part of MatFormFieldControl.
         * @docs-private
         */
        this.controlType = 'mat-chip-list';
        /**
         * When a chip is destroyed, we store the index of the destroyed chip until the chips
         * query list notifies about the update. This is necessary because we cannot determine an
         * appropriate chip that should receive focus until the array of chips updated completely.
         */
        this._lastDestroyedChipIndex = null;
        /** Subject that emits when the component has been destroyed. */
        this._destroyed = new Subject();
        /** Uid of the chip list */
        this._uid = `mat-chip-list-${nextUniqueId$1++}`;
        /** Tab index for the chip list. */
        this._tabIndex = 0;
        /**
         * User defined tab index.
         * When it is not null, use user defined tab index. Otherwise use _tabIndex
         */
        this._userTabIndex = null;
        /** Function when touched */
        this._onTouched = () => { };
        /** Function when changed */
        this._onChange = () => { };
        this._multiple = false;
        this._compareWith = (o1, o2) => o1 === o2;
        this._required = false;
        this._disabled = false;
        /** Orientation of the chip list. */
        this.ariaOrientation = 'horizontal';
        this._selectable = true;
        /** Event emitted when the selected chip list value has been changed by the user. */
        this.change = new EventEmitter();
        /**
         * Event that emits whenever the raw value of the chip-list changes. This is here primarily
         * to facilitate the two-way binding for the `value` input.
         * @docs-private
         */
        this.valueChange = new EventEmitter();
        if (this.ngControl) {
            this.ngControl.valueAccessor = this;
        }
    }
    /** The array of selected chips inside chip list. */
    get selected() {
        var _a, _b;
        return this.multiple ? (((_a = this._selectionModel) === null || _a === void 0 ? void 0 : _a.selected) || []) :
            (_b = this._selectionModel) === null || _b === void 0 ? void 0 : _b.selected[0];
    }
    /** The ARIA role applied to the chip list. */
    get role() { return this.empty ? null : 'listbox'; }
    /** Whether the user should be allowed to select multiple chips. */
    get multiple() { return this._multiple; }
    set multiple(value) {
        this._multiple = coerceBooleanProperty(value);
        this._syncChipsState();
    }
    /**
     * A function to compare the option values with the selected values. The first argument
     * is a value from an option. The second is a value from the selection. A boolean
     * should be returned.
     */
    get compareWith() { return this._compareWith; }
    set compareWith(fn) {
        this._compareWith = fn;
        if (this._selectionModel) {
            // A different comparator means the selection could change.
            this._initializeSelection();
        }
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get value() { return this._value; }
    set value(value) {
        this.writeValue(value);
        this._value = value;
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get id() {
        return this._chipInput ? this._chipInput.id : this._uid;
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get required() { return this._required; }
    set required(value) {
        this._required = coerceBooleanProperty(value);
        this.stateChanges.next();
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get placeholder() {
        return this._chipInput ? this._chipInput.placeholder : this._placeholder;
    }
    set placeholder(value) {
        this._placeholder = value;
        this.stateChanges.next();
    }
    /** Whether any chips or the matChipInput inside of this chip-list has focus. */
    get focused() {
        return (this._chipInput && this._chipInput.focused) || this._hasFocusedChip();
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get empty() {
        return (!this._chipInput || this._chipInput.empty) && (!this.chips || this.chips.length === 0);
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get shouldLabelFloat() { return !this.empty || this.focused; }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get disabled() { return this.ngControl ? !!this.ngControl.disabled : this._disabled; }
    set disabled(value) {
        this._disabled = coerceBooleanProperty(value);
        this._syncChipsState();
    }
    /**
     * Whether or not this chip list is selectable. When a chip list is not selectable,
     * the selected states for all the chips inside the chip list are always ignored.
     */
    get selectable() { return this._selectable; }
    set selectable(value) {
        this._selectable = coerceBooleanProperty(value);
        if (this.chips) {
            this.chips.forEach(chip => chip.chipListSelectable = this._selectable);
        }
    }
    set tabIndex(value) {
        this._userTabIndex = value;
        this._tabIndex = value;
    }
    /** Combined stream of all of the child chips' selection change events. */
    get chipSelectionChanges() {
        return merge(...this.chips.map(chip => chip.selectionChange));
    }
    /** Combined stream of all of the child chips' focus change events. */
    get chipFocusChanges() {
        return merge(...this.chips.map(chip => chip._onFocus));
    }
    /** Combined stream of all of the child chips' blur change events. */
    get chipBlurChanges() {
        return merge(...this.chips.map(chip => chip._onBlur));
    }
    /** Combined stream of all of the child chips' remove change events. */
    get chipRemoveChanges() {
        return merge(...this.chips.map(chip => chip.destroyed));
    }
    ngAfterContentInit() {
        this._keyManager = new FocusKeyManager(this.chips)
            .withWrap()
            .withVerticalOrientation()
            .withHomeAndEnd()
            .withHorizontalOrientation(this._dir ? this._dir.value : 'ltr');
        if (this._dir) {
            this._dir.change
                .pipe(takeUntil(this._destroyed))
                .subscribe(dir => this._keyManager.withHorizontalOrientation(dir));
        }
        this._keyManager.tabOut.pipe(takeUntil(this._destroyed)).subscribe(() => {
            this._allowFocusEscape();
        });
        // When the list changes, re-subscribe
        this.chips.changes.pipe(startWith(null), takeUntil(this._destroyed)).subscribe(() => {
            if (this.disabled) {
                // Since this happens after the content has been
                // checked, we need to defer it to the next tick.
                Promise.resolve().then(() => {
                    this._syncChipsState();
                });
            }
            this._resetChips();
            // Reset chips selected/deselected status
            this._initializeSelection();
            // Check to see if we need to update our tab index
            this._updateTabIndex();
            // Check to see if we have a destroyed chip and need to refocus
            this._updateFocusForDestroyedChips();
            this.stateChanges.next();
        });
    }
    ngOnInit() {
        this._selectionModel = new SelectionModel(this.multiple, undefined, false);
        this.stateChanges.next();
    }
    ngDoCheck() {
        if (this.ngControl) {
            // We need to re-evaluate this on every change detection cycle, because there are some
            // error triggers that we can't subscribe to (e.g. parent form submissions). This means
            // that whatever logic is in here has to be super lean or we risk destroying the performance.
            this.updateErrorState();
            if (this.ngControl.disabled !== this._disabled) {
                this.disabled = !!this.ngControl.disabled;
            }
        }
    }
    ngOnDestroy() {
        this._destroyed.next();
        this._destroyed.complete();
        this.stateChanges.complete();
        this._dropSubscriptions();
    }
    /** Associates an HTML input element with this chip list. */
    registerInput(inputElement) {
        this._chipInput = inputElement;
        // We use this attribute to match the chip list to its input in test harnesses.
        // Set the attribute directly here to avoid "changed after checked" errors.
        this._elementRef.nativeElement.setAttribute('data-mat-chip-input', inputElement.id);
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    setDescribedByIds(ids) { this._ariaDescribedby = ids.join(' '); }
    // Implemented as part of ControlValueAccessor.
    writeValue(value) {
        if (this.chips) {
            this._setSelectionByValue(value, false);
        }
    }
    // Implemented as part of ControlValueAccessor.
    registerOnChange(fn) {
        this._onChange = fn;
    }
    // Implemented as part of ControlValueAccessor.
    registerOnTouched(fn) {
        this._onTouched = fn;
    }
    // Implemented as part of ControlValueAccessor.
    setDisabledState(isDisabled) {
        this.disabled = isDisabled;
        this.stateChanges.next();
    }
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    onContainerClick(event) {
        if (!this._originatesFromChip(event)) {
            this.focus();
        }
    }
    /**
     * Focuses the first non-disabled chip in this chip list, or the associated input when there
     * are no eligible chips.
     */
    focus(options) {
        if (this.disabled) {
            return;
        }
        // TODO: ARIA says this should focus the first `selected` chip if any are selected.
        // Focus on first element if there's no chipInput inside chip-list
        if (this._chipInput && this._chipInput.focused) {
            // do nothing
        }
        else if (this.chips.length > 0) {
            this._keyManager.setFirstItemActive();
            this.stateChanges.next();
        }
        else {
            this._focusInput(options);
            this.stateChanges.next();
        }
    }
    /** Attempt to focus an input if we have one. */
    _focusInput(options) {
        if (this._chipInput) {
            this._chipInput.focus(options);
        }
    }
    /**
     * Pass events to the keyboard manager. Available here for tests.
     */
    _keydown(event) {
        const target = event.target;
        if (target && target.classList.contains('mat-chip')) {
            this._keyManager.onKeydown(event);
            this.stateChanges.next();
        }
    }
    /**
     * Check the tab index as you should not be allowed to focus an empty list.
     */
    _updateTabIndex() {
        // If we have 0 chips, we should not allow keyboard focus
        this._tabIndex = this._userTabIndex || (this.chips.length === 0 ? -1 : 0);
    }
    /**
     * If the amount of chips changed, we need to update the
     * key manager state and focus the next closest chip.
     */
    _updateFocusForDestroyedChips() {
        // Move focus to the closest chip. If no other chips remain, focus the chip-list itself.
        if (this._lastDestroyedChipIndex != null) {
            if (this.chips.length) {
                const newChipIndex = Math.min(this._lastDestroyedChipIndex, this.chips.length - 1);
                this._keyManager.setActiveItem(newChipIndex);
            }
            else {
                this.focus();
            }
        }
        this._lastDestroyedChipIndex = null;
    }
    /**
     * Utility to ensure all indexes are valid.
     *
     * @param index The index to be checked.
     * @returns True if the index is valid for our list of chips.
     */
    _isValidIndex(index) {
        return index >= 0 && index < this.chips.length;
    }
    _setSelectionByValue(value, isUserInput = true) {
        this._clearSelection();
        this.chips.forEach(chip => chip.deselect());
        if (Array.isArray(value)) {
            value.forEach(currentValue => this._selectValue(currentValue, isUserInput));
            this._sortValues();
        }
        else {
            const correspondingChip = this._selectValue(value, isUserInput);
            // Shift focus to the active item. Note that we shouldn't do this in multiple
            // mode, because we don't know what chip the user interacted with last.
            if (correspondingChip) {
                if (isUserInput) {
                    this._keyManager.setActiveItem(correspondingChip);
                }
            }
        }
    }
    /**
     * Finds and selects the chip based on its value.
     * @returns Chip that has the corresponding value.
     */
    _selectValue(value, isUserInput = true) {
        const correspondingChip = this.chips.find(chip => {
            return chip.value != null && this._compareWith(chip.value, value);
        });
        if (correspondingChip) {
            isUserInput ? correspondingChip.selectViaInteraction() : correspondingChip.select();
            this._selectionModel.select(correspondingChip);
        }
        return correspondingChip;
    }
    _initializeSelection() {
        // Defer setting the value in order to avoid the "Expression
        // has changed after it was checked" errors from Angular.
        Promise.resolve().then(() => {
            if (this.ngControl || this._value) {
                this._setSelectionByValue(this.ngControl ? this.ngControl.value : this._value, false);
                this.stateChanges.next();
            }
        });
    }
    /**
     * Deselects every chip in the list.
     * @param skip Chip that should not be deselected.
     */
    _clearSelection(skip) {
        this._selectionModel.clear();
        this.chips.forEach(chip => {
            if (chip !== skip) {
                chip.deselect();
            }
        });
        this.stateChanges.next();
    }
    /**
     * Sorts the model values, ensuring that they keep the same
     * order that they have in the panel.
     */
    _sortValues() {
        if (this._multiple) {
            this._selectionModel.clear();
            this.chips.forEach(chip => {
                if (chip.selected) {
                    this._selectionModel.select(chip);
                }
            });
            this.stateChanges.next();
        }
    }
    /** Emits change event to set the model value. */
    _propagateChanges(fallbackValue) {
        let valueToEmit = null;
        if (Array.isArray(this.selected)) {
            valueToEmit = this.selected.map(chip => chip.value);
        }
        else {
            valueToEmit = this.selected ? this.selected.value : fallbackValue;
        }
        this._value = valueToEmit;
        this.change.emit(new MatChipListChange(this, valueToEmit));
        this.valueChange.emit(valueToEmit);
        this._onChange(valueToEmit);
        this._changeDetectorRef.markForCheck();
    }
    /** When blurred, mark the field as touched when focus moved outside the chip list. */
    _blur() {
        if (!this._hasFocusedChip()) {
            this._keyManager.setActiveItem(-1);
        }
        if (!this.disabled) {
            if (this._chipInput) {
                // If there's a chip input, we should check whether the focus moved to chip input.
                // If the focus is not moved to chip input, mark the field as touched. If the focus moved
                // to chip input, do nothing.
                // Timeout is needed to wait for the focus() event trigger on chip input.
                setTimeout(() => {
                    if (!this.focused) {
                        this._markAsTouched();
                    }
                });
            }
            else {
                // If there's no chip input, then mark the field as touched.
                this._markAsTouched();
            }
        }
    }
    /** Mark the field as touched */
    _markAsTouched() {
        this._onTouched();
        this._changeDetectorRef.markForCheck();
        this.stateChanges.next();
    }
    /**
     * Removes the `tabindex` from the chip list and resets it back afterwards, allowing the
     * user to tab out of it. This prevents the list from capturing focus and redirecting
     * it back to the first chip, creating a focus trap, if it user tries to tab away.
     */
    _allowFocusEscape() {
        if (this._tabIndex !== -1) {
            this._tabIndex = -1;
            setTimeout(() => {
                this._tabIndex = this._userTabIndex || 0;
                this._changeDetectorRef.markForCheck();
            });
        }
    }
    _resetChips() {
        this._dropSubscriptions();
        this._listenToChipsFocus();
        this._listenToChipsSelection();
        this._listenToChipsRemoved();
    }
    _dropSubscriptions() {
        if (this._chipFocusSubscription) {
            this._chipFocusSubscription.unsubscribe();
            this._chipFocusSubscription = null;
        }
        if (this._chipBlurSubscription) {
            this._chipBlurSubscription.unsubscribe();
            this._chipBlurSubscription = null;
        }
        if (this._chipSelectionSubscription) {
            this._chipSelectionSubscription.unsubscribe();
            this._chipSelectionSubscription = null;
        }
        if (this._chipRemoveSubscription) {
            this._chipRemoveSubscription.unsubscribe();
            this._chipRemoveSubscription = null;
        }
    }
    /** Listens to user-generated selection events on each chip. */
    _listenToChipsSelection() {
        this._chipSelectionSubscription = this.chipSelectionChanges.subscribe(event => {
            event.source.selected
                ? this._selectionModel.select(event.source)
                : this._selectionModel.deselect(event.source);
            // For single selection chip list, make sure the deselected value is unselected.
            if (!this.multiple) {
                this.chips.forEach(chip => {
                    if (!this._selectionModel.isSelected(chip) && chip.selected) {
                        chip.deselect();
                    }
                });
            }
            if (event.isUserInput) {
                this._propagateChanges();
            }
        });
    }
    /** Listens to user-generated selection events on each chip. */
    _listenToChipsFocus() {
        this._chipFocusSubscription = this.chipFocusChanges.subscribe(event => {
            let chipIndex = this.chips.toArray().indexOf(event.chip);
            if (this._isValidIndex(chipIndex)) {
                this._keyManager.updateActiveItem(chipIndex);
            }
            this.stateChanges.next();
        });
        this._chipBlurSubscription = this.chipBlurChanges.subscribe(() => {
            this._blur();
            this.stateChanges.next();
        });
    }
    _listenToChipsRemoved() {
        this._chipRemoveSubscription = this.chipRemoveChanges.subscribe(event => {
            const chip = event.chip;
            const chipIndex = this.chips.toArray().indexOf(event.chip);
            // In case the chip that will be removed is currently focused, we temporarily store
            // the index in order to be able to determine an appropriate sibling chip that will
            // receive focus.
            if (this._isValidIndex(chipIndex) && chip._hasFocus) {
                this._lastDestroyedChipIndex = chipIndex;
            }
        });
    }
    /** Checks whether an event comes from inside a chip element. */
    _originatesFromChip(event) {
        let currentElement = event.target;
        while (currentElement && currentElement !== this._elementRef.nativeElement) {
            if (currentElement.classList.contains('mat-chip')) {
                return true;
            }
            currentElement = currentElement.parentElement;
        }
        return false;
    }
    /** Checks whether any of the chips is focused. */
    _hasFocusedChip() {
        return this.chips && this.chips.some(chip => chip._hasFocus);
    }
    /** Syncs the list's state with the individual chips. */
    _syncChipsState() {
        if (this.chips) {
            this.chips.forEach(chip => {
                chip._chipListDisabled = this._disabled;
                chip._chipListMultiple = this.multiple;
            });
        }
    }
}
MatChipList.decorators = [
    { type: Component, args: [{
                selector: 'mat-chip-list',
                template: `<div class="mat-chip-list-wrapper"><ng-content></ng-content></div>`,
                exportAs: 'matChipList',
                host: {
                    '[attr.tabindex]': 'disabled ? null : _tabIndex',
                    '[attr.aria-describedby]': '_ariaDescribedby || null',
                    '[attr.aria-required]': 'role ? required : null',
                    '[attr.aria-disabled]': 'disabled.toString()',
                    '[attr.aria-invalid]': 'errorState',
                    '[attr.aria-multiselectable]': 'multiple',
                    '[attr.role]': 'role',
                    '[class.mat-chip-list-disabled]': 'disabled',
                    '[class.mat-chip-list-invalid]': 'errorState',
                    '[class.mat-chip-list-required]': 'required',
                    '[attr.aria-orientation]': 'ariaOrientation',
                    'class': 'mat-chip-list',
                    '(focus)': 'focus()',
                    '(blur)': '_blur()',
                    '(keydown)': '_keydown($event)',
                    '[id]': '_uid',
                },
                providers: [{ provide: MatFormFieldControl, useExisting: MatChipList }],
                encapsulation: ViewEncapsulation.None,
                changeDetection: ChangeDetectionStrategy.OnPush,
                styles: [".mat-chip{position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;transform:translateZ(0);border:none;-webkit-appearance:none;-moz-appearance:none}.mat-standard-chip{transition:box-shadow 280ms cubic-bezier(0.4, 0, 0.2, 1);display:inline-flex;padding:7px 12px;border-radius:16px;align-items:center;cursor:default;min-height:32px;height:1px}._mat-animation-noopable.mat-standard-chip{transition:none;animation:none}.mat-standard-chip .mat-chip-remove{border:none;-webkit-appearance:none;-moz-appearance:none;padding:0;background:none}.mat-standard-chip .mat-chip-remove.mat-icon,.mat-standard-chip .mat-chip-remove .mat-icon{width:18px;height:18px;font-size:18px}.mat-standard-chip::after{top:0;left:0;right:0;bottom:0;position:absolute;border-radius:inherit;opacity:0;content:\"\";pointer-events:none;transition:opacity 200ms cubic-bezier(0.35, 0, 0.25, 1)}.mat-standard-chip:hover::after{opacity:.12}.mat-standard-chip:focus{outline:none}.mat-standard-chip:focus::after{opacity:.16}.cdk-high-contrast-active .mat-standard-chip{outline:solid 1px}.cdk-high-contrast-active .mat-standard-chip:focus{outline:dotted 2px}.mat-standard-chip.mat-chip-disabled::after{opacity:0}.mat-standard-chip.mat-chip-disabled .mat-chip-remove,.mat-standard-chip.mat-chip-disabled .mat-chip-trailing-icon{cursor:default}.mat-standard-chip.mat-chip-with-trailing-icon.mat-chip-with-avatar,.mat-standard-chip.mat-chip-with-avatar{padding-top:0;padding-bottom:0}.mat-standard-chip.mat-chip-with-trailing-icon.mat-chip-with-avatar{padding-right:8px;padding-left:0}[dir=rtl] .mat-standard-chip.mat-chip-with-trailing-icon.mat-chip-with-avatar{padding-left:8px;padding-right:0}.mat-standard-chip.mat-chip-with-trailing-icon{padding-top:7px;padding-bottom:7px;padding-right:8px;padding-left:12px}[dir=rtl] .mat-standard-chip.mat-chip-with-trailing-icon{padding-left:8px;padding-right:12px}.mat-standard-chip.mat-chip-with-avatar{padding-left:0;padding-right:12px}[dir=rtl] .mat-standard-chip.mat-chip-with-avatar{padding-right:0;padding-left:12px}.mat-standard-chip .mat-chip-avatar{width:24px;height:24px;margin-right:8px;margin-left:4px}[dir=rtl] .mat-standard-chip .mat-chip-avatar{margin-left:8px;margin-right:4px}.mat-standard-chip .mat-chip-remove,.mat-standard-chip .mat-chip-trailing-icon{width:18px;height:18px;cursor:pointer}.mat-standard-chip .mat-chip-remove,.mat-standard-chip .mat-chip-trailing-icon{margin-left:8px;margin-right:0}[dir=rtl] .mat-standard-chip .mat-chip-remove,[dir=rtl] .mat-standard-chip .mat-chip-trailing-icon{margin-right:8px;margin-left:0}.mat-chip-ripple{top:0;left:0;right:0;bottom:0;position:absolute;pointer-events:none;border-radius:inherit;overflow:hidden}.mat-chip-list-wrapper{display:flex;flex-direction:row;flex-wrap:wrap;align-items:center;margin:-4px}.mat-chip-list-wrapper input.mat-input-element,.mat-chip-list-wrapper .mat-standard-chip{margin:4px}.mat-chip-list-stacked .mat-chip-list-wrapper{flex-direction:column;align-items:flex-start}.mat-chip-list-stacked .mat-chip-list-wrapper .mat-standard-chip{width:100%}.mat-chip-avatar{border-radius:50%;justify-content:center;align-items:center;display:flex;overflow:hidden;object-fit:cover}input.mat-chip-input{width:150px;margin:4px;flex:1 0 150px}\n"]
            },] }
];
MatChipList.ctorParameters = () => [
    { type: ElementRef },
    { type: ChangeDetectorRef },
    { type: Directionality, decorators: [{ type: Optional }] },
    { type: NgForm, decorators: [{ type: Optional }] },
    { type: FormGroupDirective, decorators: [{ type: Optional }] },
    { type: ErrorStateMatcher },
    { type: NgControl, decorators: [{ type: Optional }, { type: Self }] }
];
MatChipList.propDecorators = {
    errorStateMatcher: [{ type: Input }],
    multiple: [{ type: Input }],
    compareWith: [{ type: Input }],
    value: [{ type: Input }],
    required: [{ type: Input }],
    placeholder: [{ type: Input }],
    disabled: [{ type: Input }],
    ariaOrientation: [{ type: Input, args: ['aria-orientation',] }],
    selectable: [{ type: Input }],
    tabIndex: [{ type: Input }],
    change: [{ type: Output }],
    valueChange: [{ type: Output }],
    chips: [{ type: ContentChildren, args: [MatChip, {
                    // We need to use `descendants: true`, because Ivy will no longer match
                    // indirect descendants if it's left as false.
                    descendants: true
                },] }]
};

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
// Increasing integer for generating unique ids.
let nextUniqueId = 0;
/**
 * Directive that adds chip-specific behaviors to an input element inside `<mat-form-field>`.
 * May be placed inside or outside of an `<mat-chip-list>`.
 */
class MatChipInput {
    constructor(_elementRef, _defaultOptions) {
        this._elementRef = _elementRef;
        this._defaultOptions = _defaultOptions;
        /** Whether the control is focused. */
        this.focused = false;
        this._addOnBlur = false;
        /**
         * The list of key codes that will trigger a chipEnd event.
         *
         * Defaults to `[ENTER]`.
         */
        this.separatorKeyCodes = this._defaultOptions.separatorKeyCodes;
        /** Emitted when a chip is to be added. */
        this.chipEnd = new EventEmitter();
        /** The input's placeholder text. */
        this.placeholder = '';
        /** Unique id for the input. */
        this.id = `mat-chip-list-input-${nextUniqueId++}`;
        this._disabled = false;
        this.inputElement = this._elementRef.nativeElement;
    }
    /** Register input for chip list */
    set chipList(value) {
        if (value) {
            this._chipList = value;
            this._chipList.registerInput(this);
        }
    }
    /**
     * Whether or not the chipEnd event will be emitted when the input is blurred.
     */
    get addOnBlur() { return this._addOnBlur; }
    set addOnBlur(value) { this._addOnBlur = coerceBooleanProperty(value); }
    /** Whether the input is disabled. */
    get disabled() { return this._disabled || (this._chipList && this._chipList.disabled); }
    set disabled(value) { this._disabled = coerceBooleanProperty(value); }
    /** Whether the input is empty. */
    get empty() { return !this.inputElement.value; }
    ngOnChanges() {
        this._chipList.stateChanges.next();
    }
    ngOnDestroy() {
        this.chipEnd.complete();
    }
    ngAfterContentInit() {
        this._focusLastChipOnBackspace = this.empty;
    }
    /** Utility method to make host definition/tests more clear. */
    _keydown(event) {
        if (event) {
            // Allow the user's focus to escape when they're tabbing forward. Note that we don't
            // want to do this when going backwards, because focus should go back to the first chip.
            if (event.keyCode === TAB && !hasModifierKey(event, 'shiftKey')) {
                this._chipList._allowFocusEscape();
            }
            // To prevent the user from accidentally deleting chips when pressing BACKSPACE continuously,
            // We focus the last chip on backspace only after the user has released the backspace button,
            // and the input is empty (see behaviour in _keyup)
            if (event.keyCode === BACKSPACE && this._focusLastChipOnBackspace) {
                this._chipList._keyManager.setLastItemActive();
                event.preventDefault();
                return;
            }
            else {
                this._focusLastChipOnBackspace = false;
            }
        }
        this._emitChipEnd(event);
    }
    /**
     * Pass events to the keyboard manager. Available here for tests.
     */
    _keyup(event) {
        // Allow user to move focus to chips next time he presses backspace
        if (!this._focusLastChipOnBackspace && event.keyCode === BACKSPACE && this.empty) {
            this._focusLastChipOnBackspace = true;
            event.preventDefault();
        }
    }
    /** Checks to see if the blur should emit the (chipEnd) event. */
    _blur() {
        if (this.addOnBlur) {
            this._emitChipEnd();
        }
        this.focused = false;
        // Blur the chip list if it is not focused
        if (!this._chipList.focused) {
            this._chipList._blur();
        }
        this._chipList.stateChanges.next();
    }
    _focus() {
        this.focused = true;
        this._focusLastChipOnBackspace = this.empty;
        this._chipList.stateChanges.next();
    }
    /** Checks to see if the (chipEnd) event needs to be emitted. */
    _emitChipEnd(event) {
        if (!this.inputElement.value && !!event) {
            this._chipList._keydown(event);
        }
        if (!event || this._isSeparatorKey(event)) {
            this.chipEnd.emit({
                input: this.inputElement,
                value: this.inputElement.value,
                chipInput: this,
            });
            event === null || event === void 0 ? void 0 : event.preventDefault();
        }
    }
    _onInput() {
        // Let chip list know whenever the value changes.
        this._chipList.stateChanges.next();
    }
    /** Focuses the input. */
    focus(options) {
        this.inputElement.focus(options);
    }
    /** Clears the input */
    clear() {
        this.inputElement.value = '';
        this._focusLastChipOnBackspace = true;
    }
    /** Checks whether a keycode is one of the configured separators. */
    _isSeparatorKey(event) {
        return !hasModifierKey(event) && new Set(this.separatorKeyCodes).has(event.keyCode);
    }
}
MatChipInput.decorators = [
    { type: Directive, args: [{
                selector: 'input[matChipInputFor]',
                exportAs: 'matChipInput, matChipInputFor',
                host: {
                    'class': 'mat-chip-input mat-input-element',
                    '(keydown)': '_keydown($event)',
                    '(keyup)': '_keyup($event)',
                    '(blur)': '_blur()',
                    '(focus)': '_focus()',
                    '(input)': '_onInput()',
                    '[id]': 'id',
                    '[attr.disabled]': 'disabled || null',
                    '[attr.placeholder]': 'placeholder || null',
                    '[attr.aria-invalid]': '_chipList && _chipList.ngControl ? _chipList.ngControl.invalid : null',
                    '[attr.aria-required]': '_chipList && _chipList.required || null',
                }
            },] }
];
MatChipInput.ctorParameters = () => [
    { type: ElementRef },
    { type: undefined, decorators: [{ type: Inject, args: [MAT_CHIPS_DEFAULT_OPTIONS,] }] }
];
MatChipInput.propDecorators = {
    chipList: [{ type: Input, args: ['matChipInputFor',] }],
    addOnBlur: [{ type: Input, args: ['matChipInputAddOnBlur',] }],
    separatorKeyCodes: [{ type: Input, args: ['matChipInputSeparatorKeyCodes',] }],
    chipEnd: [{ type: Output, args: ['matChipInputTokenEnd',] }],
    placeholder: [{ type: Input }],
    id: [{ type: Input }],
    disabled: [{ type: Input }]
};

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
const CHIP_DECLARATIONS = [
    MatChipList,
    MatChip,
    MatChipInput,
    MatChipRemove,
    MatChipAvatar,
    MatChipTrailingIcon,
];
const ɵ0 = {
    separatorKeyCodes: [ENTER]
};
class MatChipsModule {
}
MatChipsModule.decorators = [
    { type: NgModule, args: [{
                imports: [MatCommonModule],
                exports: CHIP_DECLARATIONS,
                declarations: CHIP_DECLARATIONS,
                providers: [
                    ErrorStateMatcher,
                    {
                        provide: MAT_CHIPS_DEFAULT_OPTIONS,
                        useValue: ɵ0
                    }
                ]
            },] }
];

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

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

export { MAT_CHIPS_DEFAULT_OPTIONS, MAT_CHIP_AVATAR, MAT_CHIP_REMOVE, MAT_CHIP_TRAILING_ICON, MatChip, MatChipAvatar, MatChipInput, MatChipList, MatChipListChange, MatChipRemove, MatChipSelectionChange, MatChipTrailingIcon, MatChipsModule, ɵ0 };
//# sourceMappingURL=chips.js.map