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AfterViewInit,
Component,
ComponentRef,
ElementRef,
EventEmitter,
HostBinding,
HostListener,
Input,
Output,
ViewChild,
ViewContainerRef,
ViewEncapsulation,
} from '@angular/core';
import { getKeyboardFocusableElements } from '../../../utils/internal-utils';
import { ModalConfig } from '../modal-overlay-container.service';
export class DialogOverlayRef {
public readonly onClosed: EventEmitter<void> = new EventEmitter<void>();
public readonly onCancel: EventEmitter<void> = new EventEmitter<void>();
private focusNode?: HTMLElement;
private _disabledElements: Map<Element, string | null> = new Map<
Element,
string | null
>();
constructor() {
if (
document.activeElement !== null &&
document.activeElement instanceof HTMLElement
) {
this.focusNode = document.activeElement;
}
getKeyboardFocusableElements(document.body).forEach(el => {
this._disabledElements.set(el, el.getAttribute('tabindex'));
el.setAttribute('tabindex', '-1');
});
}
public close(restoreFocus = true): void {
this.resetTabIndex();
this.onClosed.next();
if (restoreFocus) {
setTimeout(() => {
this.focusNode?.focus();
});
}
}
private resetTabIndex() {
this._disabledElements.forEach((v, k) => {
if (v === null) {
k.removeAttribute('tabindex');
} else {
k.setAttribute('tabindex', v);
}
});
}
}
@Component({
selector: 'gc-dialog-modal-overlay-container',
template: ` <dialog
#dialog
[attr.aria-label]="labelledby ? null : label"
[attr.aria-labelledby]="labelledby"
[attr.aria-describedby]="describedby"
[attr.role]="_role"
class="gc-dialog-modal-overlay-container"
(close)="handleDialogClose()"
(cancel)="handleCancel($event)"
>
<ng-container #container />
</dialog>`,
styleUrls: ['./dialog-modal-overlay-container.css'],
// eslint-disable-next-line @angular-eslint/use-component-view-encapsulation
encapsulation: ViewEncapsulation.None,
standalone: false,
})
export class DialogModalOverlayContainerComponent implements AfterViewInit {
@HostBinding('class.gc-modal-error')
public _errorType = false;
@HostBinding('class.gc-modal-inactive')
public _inactive = false;
@Input()
public label?: string;
@Input()
public describedby: string | null = null;
@Input()
public labelledby: string | null = null;
@Output()
public readonly onClose: EventEmitter<void> = new EventEmitter<void>();
@Output()
public readonly onCancel: EventEmitter<void> = new EventEmitter<void>();
@ViewChild('container', { read: ViewContainerRef })
private container?: ViewContainerRef;
@ViewChild('dialog')
private dialog?: ElementRef<HTMLDialogElement>;
@Input()
public set component(c: ComponentRef<unknown>) {
this.container?.clear();
setTimeout(() => {
this.container?.insert(c.hostView);
});
}
protected _role: 'alertdialog' | null = null;
private focusNode?: HTMLElement;
constructor(config: ModalConfig) {
this._errorType = config.type === 'error';
this._role = config.variant === 'alertdialog' ? 'alertdialog' : null;
this.focusNode = document.activeElement as HTMLElement;
}
@HostListener('keydown', ['$event'])
public handleKeyDown(evt: KeyboardEvent) {
// We suppress the possibility for the browser to emit an Dialog-CancelEvent because Chrome/Edge
// does not send such an event if one presses Escape multiple times - see https://issues.chromium.org/issues/41491338
if (evt.key === 'Escape') {
evt.preventDefault();
this.onCancel.emit();
}
}
ngAfterViewInit(): void {
if (this.dialog) {
this.dialog.nativeElement.showModal();
}
}
protected handleDialogClose(): void {
this.onClose.emit();
this.focusNode?.focus();
}
protected handleCancel(evt: Event) {
console.warn(
'We should not have reached this point because we handle the key-event.',
);
// As we canceled the Key-Event for Escape we should not have been called. Still as a safeguard
// we cancel the Cancel-Event
evt.preventDefault();
}
}
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