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

import { CdkAccordionItem, CdkAccordion, CdkAccordionModule } from '@angular/cdk/accordion';
import { TemplatePortal, PortalModule } from '@angular/cdk/portal';
import { DOCUMENT, CommonModule } from '@angular/common';
import { InjectionToken, Directive, TemplateRef, EventEmitter, Component, ViewEncapsulation, ChangeDetectionStrategy, Optional, SkipSelf, Inject, ChangeDetectorRef, ViewContainerRef, Input, Output, ContentChild, ViewChild, Host, ElementRef, Attribute, QueryList, ContentChildren, NgModule } from '@angular/core';
import { mixinTabIndex, MatCommonModule } from '@angular/material/core';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { FocusMonitor, FocusKeyManager } from '@angular/cdk/a11y';
import { distinctUntilChanged, startWith, filter, take } from 'rxjs/operators';
import { ENTER, hasModifierKey, SPACE } from '@angular/cdk/keycodes';
import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';
import { Subject, Subscription, EMPTY, merge } from 'rxjs';
import { trigger, state, style, transition, animate } from '@angular/animations';
import { UniqueSelectionDispatcher } from '@angular/cdk/collections';

/**
 * @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
 */
/**
 * Token used to provide a `MatAccordion` to `MatExpansionPanel`.
 * Used primarily to avoid circular imports between `MatAccordion` and `MatExpansionPanel`.
 */
const MAT_ACCORDION = new InjectionToken('MAT_ACCORDION');

/**
 * @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
 */
/** Time and timing curve for expansion panel animations. */
// Note: Keep this in sync with the Sass variable for the panel header animation.
const EXPANSION_PANEL_ANIMATION_TIMING = '225ms cubic-bezier(0.4,0.0,0.2,1)';
/**
 * Animations used by the Material expansion panel.
 *
 * A bug in angular animation's `state` when ViewContainers are moved using ViewContainerRef.move()
 * causes the animation state of moved components to become `void` upon exit, and not update again
 * upon reentry into the DOM.  This can lead a to situation for the expansion panel where the state
 * of the panel is `expanded` or `collapsed` but the animation state is `void`.
 *
 * To correctly handle animating to the next state, we animate between `void` and `collapsed` which
 * are defined to have the same styles. Since angular animates from the current styles to the
 * destination state's style definition, in situations where we are moving from `void`'s styles to
 * `collapsed` this acts a noop since no style values change.
 *
 * In the case where angular's animation state is out of sync with the expansion panel's state, the
 * expansion panel being `expanded` and angular animations being `void`, the animation from the
 * `expanded`'s effective styles (though in a `void` animation state) to the collapsed state will
 * occur as expected.
 *
 * Angular Bug: https://github.com/angular/angular/issues/18847
 *
 * @docs-private
 */
const matExpansionAnimations = {
    /** Animation that rotates the indicator arrow. */
    indicatorRotate: trigger('indicatorRotate', [
        state('collapsed, void', style({ transform: 'rotate(0deg)' })),
        state('expanded', style({ transform: 'rotate(180deg)' })),
        transition('expanded <=> collapsed, void => collapsed', animate(EXPANSION_PANEL_ANIMATION_TIMING)),
    ]),
    /** Animation that expands and collapses the panel content. */
    bodyExpansion: trigger('bodyExpansion', [
        state('collapsed, void', style({ height: '0px', visibility: 'hidden' })),
        state('expanded', style({ height: '*', visibility: 'visible' })),
        transition('expanded <=> collapsed, void => collapsed', animate(EXPANSION_PANEL_ANIMATION_TIMING)),
    ])
};

/**
 * @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
 */
/**
 * Expansion panel content that will be rendered lazily
 * after the panel is opened for the first time.
 */
class MatExpansionPanelContent {
    constructor(_template) {
        this._template = _template;
    }
}
MatExpansionPanelContent.decorators = [
    { type: Directive, args: [{
                selector: 'ng-template[matExpansionPanelContent]'
            },] }
];
MatExpansionPanelContent.ctorParameters = () => [
    { type: TemplateRef }
];

/**
 * @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
 */
/** Counter for generating unique element ids. */
let uniqueId = 0;
/**
 * Injection token that can be used to configure the default
 * options for the expansion panel component.
 */
const MAT_EXPANSION_PANEL_DEFAULT_OPTIONS = new InjectionToken('MAT_EXPANSION_PANEL_DEFAULT_OPTIONS');
const ɵ0 = undefined;
/**
 * This component can be used as a single element to show expandable content, or as one of
 * multiple children of an element with the MatAccordion directive attached.
 */
class MatExpansionPanel extends CdkAccordionItem {
    constructor(accordion, _changeDetectorRef, _uniqueSelectionDispatcher, _viewContainerRef, _document, _animationMode, defaultOptions) {
        super(accordion, _changeDetectorRef, _uniqueSelectionDispatcher);
        this._viewContainerRef = _viewContainerRef;
        this._animationMode = _animationMode;
        this._hideToggle = false;
        /** An event emitted after the body's expansion animation happens. */
        this.afterExpand = new EventEmitter();
        /** An event emitted after the body's collapse animation happens. */
        this.afterCollapse = new EventEmitter();
        /** Stream that emits for changes in `@Input` properties. */
        this._inputChanges = new Subject();
        /** ID for the associated header element. Used for a11y labelling. */
        this._headerId = `mat-expansion-panel-header-${uniqueId++}`;
        /** Stream of body animation done events. */
        this._bodyAnimationDone = new Subject();
        this.accordion = accordion;
        this._document = _document;
        // We need a Subject with distinctUntilChanged, because the `done` event
        // fires twice on some browsers. See https://github.com/angular/angular/issues/24084
        this._bodyAnimationDone.pipe(distinctUntilChanged((x, y) => {
            return x.fromState === y.fromState && x.toState === y.toState;
        })).subscribe(event => {
            if (event.fromState !== 'void') {
                if (event.toState === 'expanded') {
                    this.afterExpand.emit();
                }
                else if (event.toState === 'collapsed') {
                    this.afterCollapse.emit();
                }
            }
        });
        if (defaultOptions) {
            this.hideToggle = defaultOptions.hideToggle;
        }
    }
    /** Whether the toggle indicator should be hidden. */
    get hideToggle() {
        return this._hideToggle || (this.accordion && this.accordion.hideToggle);
    }
    set hideToggle(value) {
        this._hideToggle = coerceBooleanProperty(value);
    }
    /** The position of the expansion indicator. */
    get togglePosition() {
        return this._togglePosition || (this.accordion && this.accordion.togglePosition);
    }
    set togglePosition(value) {
        this._togglePosition = value;
    }
    /** Determines whether the expansion panel should have spacing between it and its siblings. */
    _hasSpacing() {
        if (this.accordion) {
            return this.expanded && this.accordion.displayMode === 'default';
        }
        return false;
    }
    /** Gets the expanded state string. */
    _getExpandedState() {
        return this.expanded ? 'expanded' : 'collapsed';
    }
    /** Toggles the expanded state of the expansion panel. */
    toggle() {
        this.expanded = !this.expanded;
    }
    /** Sets the expanded state of the expansion panel to false. */
    close() {
        this.expanded = false;
    }
    /** Sets the expanded state of the expansion panel to true. */
    open() {
        this.expanded = true;
    }
    ngAfterContentInit() {
        if (this._lazyContent) {
            // Render the content as soon as the panel becomes open.
            this.opened.pipe(startWith(null), filter(() => this.expanded && !this._portal), take(1)).subscribe(() => {
                this._portal = new TemplatePortal(this._lazyContent._template, this._viewContainerRef);
            });
        }
    }
    ngOnChanges(changes) {
        this._inputChanges.next(changes);
    }
    ngOnDestroy() {
        super.ngOnDestroy();
        this._bodyAnimationDone.complete();
        this._inputChanges.complete();
    }
    /** Checks whether the expansion panel's content contains the currently-focused element. */
    _containsFocus() {
        if (this._body) {
            const focusedElement = this._document.activeElement;
            const bodyElement = this._body.nativeElement;
            return focusedElement === bodyElement || bodyElement.contains(focusedElement);
        }
        return false;
    }
}
MatExpansionPanel.decorators = [
    { type: Component, args: [{
                selector: 'mat-expansion-panel',
                exportAs: 'matExpansionPanel',
                template: "<ng-content select=\"mat-expansion-panel-header\"></ng-content>\n<div class=\"mat-expansion-panel-content\"\n     role=\"region\"\n     [@bodyExpansion]=\"_getExpandedState()\"\n     (@bodyExpansion.done)=\"_bodyAnimationDone.next($event)\"\n     [attr.aria-labelledby]=\"_headerId\"\n     [id]=\"id\"\n     #body>\n  <div class=\"mat-expansion-panel-body\">\n    <ng-content></ng-content>\n    <ng-template [cdkPortalOutlet]=\"_portal\"></ng-template>\n  </div>\n  <ng-content select=\"mat-action-row\"></ng-content>\n</div>\n",
                encapsulation: ViewEncapsulation.None,
                changeDetection: ChangeDetectionStrategy.OnPush,
                inputs: ['disabled', 'expanded'],
                outputs: ['opened', 'closed', 'expandedChange'],
                animations: [matExpansionAnimations.bodyExpansion],
                providers: [
                    // Provide MatAccordion as undefined to prevent nested expansion panels from registering
                    // to the same accordion.
                    { provide: MAT_ACCORDION, useValue: ɵ0 },
                ],
                host: {
                    'class': 'mat-expansion-panel',
                    '[class.mat-expanded]': 'expanded',
                    '[class._mat-animation-noopable]': '_animationMode === "NoopAnimations"',
                    '[class.mat-expansion-panel-spacing]': '_hasSpacing()',
                },
                styles: [".mat-expansion-panel{box-sizing:content-box;display:block;margin:0;border-radius:4px;overflow:hidden;transition:margin 225ms cubic-bezier(0.4, 0, 0.2, 1),box-shadow 280ms cubic-bezier(0.4, 0, 0.2, 1);position:relative}.mat-accordion .mat-expansion-panel:not(.mat-expanded),.mat-accordion .mat-expansion-panel:not(.mat-expansion-panel-spacing){border-radius:0}.mat-accordion .mat-expansion-panel:first-of-type{border-top-right-radius:4px;border-top-left-radius:4px}.mat-accordion .mat-expansion-panel:last-of-type{border-bottom-right-radius:4px;border-bottom-left-radius:4px}.cdk-high-contrast-active .mat-expansion-panel{outline:solid 1px}.mat-expansion-panel.ng-animate-disabled,.ng-animate-disabled .mat-expansion-panel,.mat-expansion-panel._mat-animation-noopable{transition:none}.mat-expansion-panel-content{display:flex;flex-direction:column;overflow:visible}.mat-expansion-panel-body{padding:0 24px 16px}.mat-expansion-panel-spacing{margin:16px 0}.mat-accordion>.mat-expansion-panel-spacing:first-child,.mat-accordion>*:first-child:not(.mat-expansion-panel) .mat-expansion-panel-spacing{margin-top:0}.mat-accordion>.mat-expansion-panel-spacing:last-child,.mat-accordion>*:last-child:not(.mat-expansion-panel) .mat-expansion-panel-spacing{margin-bottom:0}.mat-action-row{border-top-style:solid;border-top-width:1px;display:flex;flex-direction:row;justify-content:flex-end;padding:16px 8px 16px 24px}.mat-action-row button.mat-button-base,.mat-action-row button.mat-mdc-button-base{margin-left:8px}[dir=rtl] .mat-action-row button.mat-button-base,[dir=rtl] .mat-action-row button.mat-mdc-button-base{margin-left:0;margin-right:8px}\n"]
            },] }
];
MatExpansionPanel.ctorParameters = () => [
    { type: undefined, decorators: [{ type: Optional }, { type: SkipSelf }, { type: Inject, args: [MAT_ACCORDION,] }] },
    { type: ChangeDetectorRef },
    { type: UniqueSelectionDispatcher },
    { type: ViewContainerRef },
    { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] },
    { type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] },
    { type: undefined, decorators: [{ type: Inject, args: [MAT_EXPANSION_PANEL_DEFAULT_OPTIONS,] }, { type: Optional }] }
];
MatExpansionPanel.propDecorators = {
    hideToggle: [{ type: Input }],
    togglePosition: [{ type: Input }],
    afterExpand: [{ type: Output }],
    afterCollapse: [{ type: Output }],
    _lazyContent: [{ type: ContentChild, args: [MatExpansionPanelContent,] }],
    _body: [{ type: ViewChild, args: ['body',] }]
};
/**
 * Actions of a `<mat-expansion-panel>`.
 */
class MatExpansionPanelActionRow {
}
MatExpansionPanelActionRow.decorators = [
    { type: Directive, args: [{
                selector: 'mat-action-row',
                host: {
                    class: 'mat-action-row'
                }
            },] }
];

/**
 * @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 MatExpansionPanelHeader.
/** @docs-private */
class MatExpansionPanelHeaderBase {
}
const _MatExpansionPanelHeaderMixinBase = mixinTabIndex(MatExpansionPanelHeaderBase);
/**
 * Header element of a `<mat-expansion-panel>`.
 */
class MatExpansionPanelHeader extends _MatExpansionPanelHeaderMixinBase {
    constructor(panel, _element, _focusMonitor, _changeDetectorRef, defaultOptions, _animationMode, tabIndex) {
        super();
        this.panel = panel;
        this._element = _element;
        this._focusMonitor = _focusMonitor;
        this._changeDetectorRef = _changeDetectorRef;
        this._animationMode = _animationMode;
        this._parentChangeSubscription = Subscription.EMPTY;
        const accordionHideToggleChange = panel.accordion ?
            panel.accordion._stateChanges.pipe(filter(changes => !!(changes['hideToggle'] || changes['togglePosition']))) :
            EMPTY;
        this.tabIndex = parseInt(tabIndex || '') || 0;
        // Since the toggle state depends on an @Input on the panel, we
        // need to subscribe and trigger change detection manually.
        this._parentChangeSubscription =
            merge(panel.opened, panel.closed, accordionHideToggleChange, panel._inputChanges.pipe(filter(changes => {
                return !!(changes['hideToggle'] ||
                    changes['disabled'] ||
                    changes['togglePosition']);
            })))
                .subscribe(() => this._changeDetectorRef.markForCheck());
        // Avoids focus being lost if the panel contained the focused element and was closed.
        panel.closed
            .pipe(filter(() => panel._containsFocus()))
            .subscribe(() => _focusMonitor.focusVia(_element, 'program'));
        if (defaultOptions) {
            this.expandedHeight = defaultOptions.expandedHeight;
            this.collapsedHeight = defaultOptions.collapsedHeight;
        }
    }
    /**
     * Whether the associated panel is disabled. Implemented as a part of `FocusableOption`.
     * @docs-private
     */
    get disabled() {
        return this.panel.disabled;
    }
    /** Toggles the expanded state of the panel. */
    _toggle() {
        if (!this.disabled) {
            this.panel.toggle();
        }
    }
    /** Gets whether the panel is expanded. */
    _isExpanded() {
        return this.panel.expanded;
    }
    /** Gets the expanded state string of the panel. */
    _getExpandedState() {
        return this.panel._getExpandedState();
    }
    /** Gets the panel id. */
    _getPanelId() {
        return this.panel.id;
    }
    /** Gets the toggle position for the header. */
    _getTogglePosition() {
        return this.panel.togglePosition;
    }
    /** Gets whether the expand indicator should be shown. */
    _showToggle() {
        return !this.panel.hideToggle && !this.panel.disabled;
    }
    /**
     * Gets the current height of the header. Null if no custom height has been
     * specified, and if the default height from the stylesheet should be used.
     */
    _getHeaderHeight() {
        const isExpanded = this._isExpanded();
        if (isExpanded && this.expandedHeight) {
            return this.expandedHeight;
        }
        else if (!isExpanded && this.collapsedHeight) {
            return this.collapsedHeight;
        }
        return null;
    }
    /** Handle keydown event calling to toggle() if appropriate. */
    _keydown(event) {
        switch (event.keyCode) {
            // Toggle for space and enter keys.
            case SPACE:
            case ENTER:
                if (!hasModifierKey(event)) {
                    event.preventDefault();
                    this._toggle();
                }
                break;
            default:
                if (this.panel.accordion) {
                    this.panel.accordion._handleHeaderKeydown(event);
                }
                return;
        }
    }
    /**
     * Focuses the panel header. Implemented as a part of `FocusableOption`.
     * @param origin Origin of the action that triggered the focus.
     * @docs-private
     */
    focus(origin, options) {
        if (origin) {
            this._focusMonitor.focusVia(this._element, origin, options);
        }
        else {
            this._element.nativeElement.focus(options);
        }
    }
    ngAfterViewInit() {
        this._focusMonitor.monitor(this._element).subscribe(origin => {
            if (origin && this.panel.accordion) {
                this.panel.accordion._handleHeaderFocus(this);
            }
        });
    }
    ngOnDestroy() {
        this._parentChangeSubscription.unsubscribe();
        this._focusMonitor.stopMonitoring(this._element);
    }
}
MatExpansionPanelHeader.decorators = [
    { type: Component, args: [{
                selector: 'mat-expansion-panel-header',
                template: "<span class=\"mat-content\">\n  <ng-content select=\"mat-panel-title\"></ng-content>\n  <ng-content select=\"mat-panel-description\"></ng-content>\n  <ng-content></ng-content>\n</span>\n<span [@indicatorRotate]=\"_getExpandedState()\" *ngIf=\"_showToggle()\"\n      class=\"mat-expansion-indicator\"></span>\n",
                encapsulation: ViewEncapsulation.None,
                changeDetection: ChangeDetectionStrategy.OnPush,
                inputs: ['tabIndex'],
                animations: [
                    matExpansionAnimations.indicatorRotate,
                ],
                host: {
                    'class': 'mat-expansion-panel-header mat-focus-indicator',
                    'role': 'button',
                    '[attr.id]': 'panel._headerId',
                    '[attr.tabindex]': 'tabIndex',
                    '[attr.aria-controls]': '_getPanelId()',
                    '[attr.aria-expanded]': '_isExpanded()',
                    '[attr.aria-disabled]': 'panel.disabled',
                    '[class.mat-expanded]': '_isExpanded()',
                    '[class.mat-expansion-toggle-indicator-after]': `_getTogglePosition() === 'after'`,
                    '[class.mat-expansion-toggle-indicator-before]': `_getTogglePosition() === 'before'`,
                    '[class._mat-animation-noopable]': '_animationMode === "NoopAnimations"',
                    '[style.height]': '_getHeaderHeight()',
                    '(click)': '_toggle()',
                    '(keydown)': '_keydown($event)',
                },
                styles: [".mat-expansion-panel-header{display:flex;flex-direction:row;align-items:center;padding:0 24px;border-radius:inherit;transition:height 225ms cubic-bezier(0.4, 0, 0.2, 1)}.mat-expansion-panel-header._mat-animation-noopable{transition:none}.mat-expansion-panel-header:focus,.mat-expansion-panel-header:hover{outline:none}.mat-expansion-panel-header.mat-expanded:focus,.mat-expansion-panel-header.mat-expanded:hover{background:inherit}.mat-expansion-panel-header:not([aria-disabled=true]){cursor:pointer}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before{flex-direction:row-reverse}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 16px 0 0}[dir=rtl] .mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 0 0 16px}.mat-content{display:flex;flex:1;flex-direction:row;overflow:hidden}.mat-expansion-panel-header-title,.mat-expansion-panel-header-description{display:flex;flex-grow:1;margin-right:16px}[dir=rtl] .mat-expansion-panel-header-title,[dir=rtl] .mat-expansion-panel-header-description{margin-right:0;margin-left:16px}.mat-expansion-panel-header-description{flex-grow:2}.mat-expansion-indicator::after{border-style:solid;border-width:0 2px 2px 0;content:\"\";display:inline-block;padding:3px;transform:rotate(45deg);vertical-align:middle}.cdk-high-contrast-active .mat-expansion-panel .mat-expansion-panel-header.cdk-keyboard-focused:not([aria-disabled=true])::before,.cdk-high-contrast-active .mat-expansion-panel .mat-expansion-panel-header.cdk-program-focused:not([aria-disabled=true])::before,.cdk-high-contrast-active .mat-expansion-panel:not(.mat-expanded) .mat-expansion-panel-header:hover:not([aria-disabled=true])::before{top:0;left:0;right:0;bottom:0;position:absolute;box-sizing:border-box;pointer-events:none;border:3px solid;border-radius:4px;content:\"\"}.cdk-high-contrast-active .mat-expansion-panel-content{border-top:1px solid;border-top-left-radius:0;border-top-right-radius:0}\n"]
            },] }
];
MatExpansionPanelHeader.ctorParameters = () => [
    { type: MatExpansionPanel, decorators: [{ type: Host }] },
    { type: ElementRef },
    { type: FocusMonitor },
    { type: ChangeDetectorRef },
    { type: undefined, decorators: [{ type: Inject, args: [MAT_EXPANSION_PANEL_DEFAULT_OPTIONS,] }, { type: Optional }] },
    { type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] },
    { type: String, decorators: [{ type: Attribute, args: ['tabindex',] }] }
];
MatExpansionPanelHeader.propDecorators = {
    expandedHeight: [{ type: Input }],
    collapsedHeight: [{ type: Input }]
};
/**
 * Description element of a `<mat-expansion-panel-header>`.
 */
class MatExpansionPanelDescription {
}
MatExpansionPanelDescription.decorators = [
    { type: Directive, args: [{
                selector: 'mat-panel-description',
                host: {
                    class: 'mat-expansion-panel-header-description'
                }
            },] }
];
/**
 * Title element of a `<mat-expansion-panel-header>`.
 */
class MatExpansionPanelTitle {
}
MatExpansionPanelTitle.decorators = [
    { type: Directive, args: [{
                selector: 'mat-panel-title',
                host: {
                    class: 'mat-expansion-panel-header-title'
                }
            },] }
];

/**
 * @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
 */
/**
 * Directive for a Material Design Accordion.
 */
class MatAccordion extends CdkAccordion {
    constructor() {
        super(...arguments);
        /** Headers belonging to this accordion. */
        this._ownHeaders = new QueryList();
        this._hideToggle = false;
        /**
         * Display mode used for all expansion panels in the accordion. Currently two display
         * modes exist:
         *  default - a gutter-like spacing is placed around any expanded panel, placing the expanded
         *     panel at a different elevation from the rest of the accordion.
         *  flat - no spacing is placed around expanded panels, showing all panels at the same
         *     elevation.
         */
        this.displayMode = 'default';
        /** The position of the expansion indicator. */
        this.togglePosition = 'after';
    }
    /** Whether the expansion indicator should be hidden. */
    get hideToggle() { return this._hideToggle; }
    set hideToggle(show) { this._hideToggle = coerceBooleanProperty(show); }
    ngAfterContentInit() {
        this._headers.changes
            .pipe(startWith(this._headers))
            .subscribe((headers) => {
            this._ownHeaders.reset(headers.filter(header => header.panel.accordion === this));
            this._ownHeaders.notifyOnChanges();
        });
        this._keyManager = new FocusKeyManager(this._ownHeaders).withWrap().withHomeAndEnd();
    }
    /** Handles keyboard events coming in from the panel headers. */
    _handleHeaderKeydown(event) {
        this._keyManager.onKeydown(event);
    }
    _handleHeaderFocus(header) {
        this._keyManager.updateActiveItem(header);
    }
    ngOnDestroy() {
        super.ngOnDestroy();
        this._ownHeaders.destroy();
    }
}
MatAccordion.decorators = [
    { type: Directive, args: [{
                selector: 'mat-accordion',
                exportAs: 'matAccordion',
                inputs: ['multi'],
                providers: [{
                        provide: MAT_ACCORDION,
                        useExisting: MatAccordion
                    }],
                host: {
                    class: 'mat-accordion',
                    // Class binding which is only used by the test harness as there is no other
                    // way for the harness to detect if multiple panel support is enabled.
                    '[class.mat-accordion-multi]': 'this.multi',
                }
            },] }
];
MatAccordion.propDecorators = {
    _headers: [{ type: ContentChildren, args: [MatExpansionPanelHeader, { descendants: true },] }],
    hideToggle: [{ type: Input }],
    displayMode: [{ type: Input }],
    togglePosition: [{ 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
 */
class MatExpansionModule {
}
MatExpansionModule.decorators = [
    { type: NgModule, args: [{
                imports: [CommonModule, MatCommonModule, CdkAccordionModule, PortalModule],
                exports: [
                    MatAccordion,
                    MatExpansionPanel,
                    MatExpansionPanelActionRow,
                    MatExpansionPanelHeader,
                    MatExpansionPanelTitle,
                    MatExpansionPanelDescription,
                    MatExpansionPanelContent,
                ],
                declarations: [
                    MatAccordion,
                    MatExpansionPanel,
                    MatExpansionPanelActionRow,
                    MatExpansionPanelHeader,
                    MatExpansionPanelTitle,
                    MatExpansionPanelDescription,
                    MatExpansionPanelContent,
                ],
            },] }
];

/**
 * @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 { EXPANSION_PANEL_ANIMATION_TIMING, MAT_ACCORDION, MAT_EXPANSION_PANEL_DEFAULT_OPTIONS, MatAccordion, MatExpansionModule, MatExpansionPanel, MatExpansionPanelActionRow, MatExpansionPanelContent, MatExpansionPanelDescription, MatExpansionPanelHeader, MatExpansionPanelTitle, matExpansionAnimations, ɵ0 };
//# sourceMappingURL=expansion.js.map