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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
AfterViewInit,
Component,
ElementRef,
EventEmitter,
HostBinding,
Input,
NgZone,
OnDestroy,
Output,
Type,
ViewChild,
ViewContainerRef,
} from '@angular/core';
import { observeSize, subscribe } from '../../utils/internal-utils';
import { Callback } from '../../utils/util.types';
import {
DynamicHeadingLevelPassthroughService,
DynamicHeadingLevelService,
} from '../../dynamic-heading/dynamic-heading-level.service';
import { AutoFocusAreaDirective } from '../auto-focus-area.directive';
/**
* The sidebar component is designed to add side content to a fullscreen app.
*/
@Component({
selector: 'gc-sidebar',
templateUrl: './sidebar.component.html',
styleUrls: ['./sidebar.component.css'],
providers: [DynamicHeadingLevelService],
viewProviders: [
{
provide: DynamicHeadingLevelService,
useClass: DynamicHeadingLevelPassthroughService,
},
],
})
export class SidebarComponent implements AfterViewInit, OnDestroy {
/**
* Label that shows on the sidebar.
*/
@Input()
public label = '';
/**
* Decides if the sidebar will be placed on the left or right side of the parent element.
*/
@Input()
public position: 'left' | 'right' = 'right';
/**
* Width of the sidebar in pixels.
*/
@Input()
public width?: number;
/**
* Top offset of the sidebar in pixels.
*/
@Input()
@HostBinding('style.--gc-sidebar-top-offset.px')
public topOffset?: number;
/**
* Component that the sidebar displays as it's content.
*/
@Input()
public content?: Type<unknown>;
/**
* Decides if the sidebar is animated when opening or not.
*/
@Input()
public animateOnOpen = true;
/**
* Decides if the sidebar is animated when closing or not.
*/
@Input()
public animateOnClose = true;
/**
* Informs about status of the sidebar state.
*/
@Output()
public readonly onClosed: EventEmitter<this> = new EventEmitter<this>();
/**
* @ignore
*/
@ViewChild('sidebar')
private sidebar!: ElementRef<HTMLDivElement>;
/**
* @ignore
*/
@ViewChild('content', { read: ViewContainerRef, static: true })
private contentPlaceholder!: ViewContainerRef;
/** @ignore */
@ViewChild('contentContainer')
private contentContainer!: ElementRef<HTMLElement>;
/**
* Decides if the status of the sidebar is open or not open.
*/
@Input()
get isOpen(): boolean {
return this._isOpen;
}
set isOpen(isOpen: boolean) {
if ((isOpen && this.animateOnOpen) || (!isOpen && this.animateOnClose)) {
this._animationEnabled = true;
}
this._isOpen = isOpen;
if (!isOpen) {
if (!this.animateOnClose) {
// fire the event when closing without an animation,
// when it's animated this is done via the transition event
this.onClosed.emit(this);
} else {
// when the sidebar is closed immediately after opening it (with an animation enabled),
// transition events may not fire:
// * there may be no new transition for the closure started in case the open transition didn't actually
// move the element yet
// * there may be no transition at all when the closing happens before the open transition starts (may need a
// few ticks before the start event would be triggered)
// => async closure whith minimal delay which is canceled if a new transition starts, as fallback
// for closure if no new transition follows
this.closeEventTimeout = setTimeout(() => {
this._animationEnabled = false;
this.onClosed.emit(this);
this.closeEventTimeout = undefined;
}, 75);
}
}
if (isOpen) {
setTimeout(() => this.moveFocusIntoContent());
}
}
/**
* @ignore
*/
public _animationEnabled = false;
/**
* @ignore
*/
public _fullWidth = false;
/**
* @ignore
*/
public _isOpen = false;
/**
* @ignore
*/
private resizeObserverCleanup?: Callback;
/** @ignore */
private clickHandlerCleanup?: Callback;
/** @ignore */
private closeEventTimeout?: ReturnType<typeof setTimeout>;
constructor(
private zone: NgZone,
private el: ElementRef<HTMLElement>,
) {}
/**
* @ignore
*/
ngAfterViewInit(): void {
this.checkWidth();
this.setWidth();
this.listenForModalOverlayClicks();
if (this.content) {
this.contentPlaceholder.clear();
this.contentPlaceholder.createComponent(this.content);
}
this.resizeObserverCleanup = observeSize(
new ElementRef(document.documentElement),
this.zone,
this.resizeObserverCallback.bind(this),
);
}
/**
* @ignore
*/
ngOnDestroy(): void {
if (this.resizeObserverCleanup) {
this.resizeObserverCleanup();
}
if (this.clickHandlerCleanup) {
this.clickHandlerCleanup();
}
if (this.closeEventTimeout) {
clearTimeout(this.closeEventTimeout);
}
}
/**
* @ignore
*/
public _closeSidebar() {
this.isOpen = false;
}
/**
* @ignore
*/
public _onKeyDown(event: KeyboardEvent): void {
const key = event.key;
if (key === 'Escape' && this.isOpen) {
this._closeSidebar();
}
}
/**
* @ignore
*/
public _onTransitionEnd() {
this._animationEnabled = false;
if (!this.isOpen) {
this.onClosed.emit(this);
}
}
/** @ignore */
public _onTransitionStart() {
if (this.closeEventTimeout) {
clearTimeout(this.closeEventTimeout);
this.closeEventTimeout = undefined;
}
}
/**
* @ignore
*/
private resizeObserverCallback() {
this.checkWidth();
}
/**
* @ignore
*/
private listenForModalOverlayClicks(): void {
if (this.el.nativeElement.parentElement != null) {
this.clickHandlerCleanup = subscribe(
this.el.nativeElement.parentElement,
'click',
this.closeSidebarOnModalClick.bind(this),
);
}
}
/**
* @ignore
*/
private closeSidebarOnModalClick(event: MouseEvent): void {
const modalElement = this.el.nativeElement.parentElement;
if (event.target === modalElement) {
this._closeSidebar();
}
}
/**
* @ignore
*/
private checkWidth(): void {
const clientWidth = window.document.documentElement.clientWidth;
if (clientWidth < 480 || (this.width ?? 0) > clientWidth) {
this._fullWidth = true;
} else {
this._fullWidth = false;
}
}
/**
* @ignore
*/
private setWidth(): void {
if (this.width) {
this.sidebar.nativeElement.style.width = this.width.toString() + 'px';
}
}
/** @ignore */
private moveFocusIntoContent(): void {
// cannot apply the directive directly as the element is off-screen/hidden initially
// due to the animation -> need to wait for it to be visible before moving focus works
AutoFocusAreaDirective.focusInitialElement(
this.contentContainer.nativeElement,
);
}
}
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