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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
Component,
ElementRef,
EventEmitter,
Input,
NgZone,
OnDestroy,
Output,
QueryList,
TemplateRef,
ViewChild,
ViewChildren,
} from '@angular/core';
import { observeElementSize, subscribeWindow } from '../utils/internal-utils';
import {
BadgeItem,
Callback,
FocusableElementOwner,
Item,
Key,
LinkItem,
} from '../utils/util.types';
import { itemTrack } from '../utils/utilities';
import { ComponentMapperDirective } from '../internal/component-mapper.directive';
import { BadgeItemTemplateContext } from '../badge-list/badge-list.component';
import { ButtonComponent } from '../button/button.component';
/**
* Context Header is a responsive, context-specific, horizontal user interface element that contains badges and links that lead to other websites or parts of the page.
*/
@Component({
selector: 'gc-context-header',
templateUrl: './context-header.component.html',
styleUrls: ['./context-header.component.css'],
standalone: false,
})
export class ContextHeaderComponent
implements OnDestroy, FocusableElementOwner
{
/**
* Label to show in the header.
*/
@Input()
public label = '';
/**
* Items that will be rendered as badges in the header.
*/
@Input()
public badges: readonly BadgeItem[] = [];
/**
* Icon template that will be used for the badges.
*/
@Input()
public iconProvider?: TemplateRef<BadgeItemTemplateContext>;
/** Emitted when an action item is pressed. */
@Output()
public readonly onAction: EventEmitter<Item> = new EventEmitter<Item>();
/**
* @ignore
*/
@ViewChild('actionsContainer')
private actionsContainerElement!: ElementRef<HTMLDivElement>;
/** @ignore */
@ViewChild('menuButton', { read: ButtonComponent })
private menuButton?: ButtonComponent;
/** @ignore */
@ViewChildren('actionButton', { read: ComponentMapperDirective })
private actionButtons?: QueryList<ComponentMapperDirective<ButtonComponent>>;
/**
* Items that will be rendered as links in the header.
* @deprecated use 'actions' input instead
*/
@Input()
public set links(value: readonly LinkItem[]) {
this._links = value;
this.rebuildPopupItems();
console.warn(
'The "links" input is deprecated and should not be used. Please use "actions" input instead.',
);
}
public get links(): readonly LinkItem[] {
return this._links;
}
/**
* Items that will be rendered as buttons in the header.
*/
@Input()
public get actions(): Item[] {
return this._actions;
}
public set actions(value: Item[]) {
this._actions = value;
this.rebuildPopupItems();
}
/**
* @ignore
*/
public _mode: 'small' | 'medium' | 'default' = 'default';
/** @ignore */
protected _popItems: readonly Item[] = [];
/** @ignore */
protected actionsAndLinks: readonly Item[] = [];
/** @ignore */
protected inSmallText = false;
/**
* @ignore
*/
private observerCallbacks: Callback[] = [];
/** @ignore */
private _actions: Item[] = [];
/**
* @ignore
*/
private _links: readonly LinkItem[] = [];
constructor(zone: NgZone, el: ElementRef<HTMLElement>) {
this.observerCallbacks.push(
observeElementSize(el.nativeElement, zone, this.handleResize.bind(this)),
);
this.observerCallbacks.push(
subscribeWindow('resize', this.computeWindowRelatedProps.bind(this)),
);
this.computeWindowRelatedProps();
}
/**
* @ignore
*/
ngOnDestroy(): void {
this.observerCallbacks.forEach(cb => cb());
}
/**
* Focus action in the header with the given key.
* @param key the key of the `action` to focus
* @returns `true` if focus has been transferred
*/
public focusAction(key: Key): boolean {
if (this._mode === 'default') {
const button = this.actionButtons?.find(i => i.key === key)?.component;
if (button) {
return button.focusChild();
}
} else {
return this.menuButton ? this.menuButton.focusChild() : false;
}
return false;
}
public focusChild(): boolean {
if (this._mode !== 'default') {
return this.menuButton ? this.menuButton.focusChild() : false;
} else {
for (const action of this._actions) {
if (this.focusAction(action.key)) {
return true;
}
}
}
return false;
}
/** @ignore */
protected handleMenuAction(item: Item) {
const action = this.actionsAndLinks.find(a => a.key === item.key);
if (action) {
this.onAction.emit(action);
} else {
console.error(`Unable to find action ${item.key}`);
}
}
/**
* @ignore
*/
protected _itemTrackBy(item: Item): string {
return itemTrack(item);
}
/** @ignore */
private computeWindowRelatedProps() {
this.inSmallText = window.innerWidth <= 480 || window.innerHeight <= 1024;
}
/** @ignore */
private handleResize(entry: ResizeObserverEntry): void {
// padding 64px
// gap = 24px
const elementWidth = entry.contentRect.width - 64 - 24;
const mediumButtonExists = this.links.length > 0;
// medium button is 148px
if (elementWidth - (mediumButtonExists ? 148 : 0) < 400) {
this._mode = 'small';
return;
}
const actionsContainerWidth =
this.actionsContainerElement.nativeElement.getBoundingClientRect().width;
const spaceInHeader = elementWidth - actionsContainerWidth;
if (spaceInHeader < 720) {
this._mode = 'medium';
} else {
this._mode = 'default';
}
}
/** @ignore */
private rebuildPopupItems() {
this.actionsAndLinks = this.actions.concat(this.links);
this._popItems = this.actionsAndLinks.map(a => ({
key: a.key,
label: `${a.label} öffnen`,
}));
}
}
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