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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
Component,
ElementRef,
Input,
Optional,
ViewChild,
} from '@angular/core';
import { FocusableElementOwner } from '../utils/util.types';
import { DynamicHeadingLevelService } from './dynamic-heading-level.service';
/**
* Inserts a heading element (`h1` to `h6`), the level is automatically calculated based on the context.
* The context is controlled by adding the accompanying directive to parents and containers.
*/
@Component({
selector: 'gc-dynamic-heading',
templateUrl: './dynamic-heading.component.html',
styleUrls: ['./dynamic-heading.component.css'],
standalone: false,
})
export class DynamicHeadingComponent implements FocusableElementOwner {
/**
* Set the level of the heading within it's context. `same` puts the heading
* at the level determined from the context, `child` creates a subheading within
* the context. The latter is intended as quick shortcut for single subheadings, for multiple
* headings or more complex structures use the related directive.
*
* Note that one heading at level `same` should be present in each context,
* i.e. before using the related directive or this property to add deeper levels, to ensure
* a semantically valid heading structure.
*/
@Input()
public level: 'same' | 'child' = 'same';
/** @ignore */
@ViewChild('element')
private element?: ElementRef<HTMLElement>;
/**
* Get the effective heading level based on the component's input and context.
* @ignore
*/
public get headingLevel(): number {
if (this.level === 'same') {
return this.currentHeadingLevel;
} else {
return this.currentHeadingLevel + 1;
}
}
/** @ignore */
private currentHeadingLevel: number;
constructor(
@Optional() private parentLevel: DynamicHeadingLevelService | null,
) {
this.currentHeadingLevel = parentLevel?.headingLevel ?? 1;
}
focusChild(): boolean {
if (this.element?.nativeElement) {
this.element.nativeElement.setAttribute('tabindex', '-1');
this.element.nativeElement.focus();
return true;
}
return false;
}
/** @ignore */
protected onBlur(): void {
if (this.element?.nativeElement) {
this.element.nativeElement.removeAttribute('tabindex');
}
}
}
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