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Directive,
ElementRef,
HostBinding,
HostListener,
Input,
inject,
} from '@angular/core';
import { BaseIndexedItem } from '../utils/internal-utils';
import { Key } from '../utils/util.types';
import { ListBoxDirective } from './listbox.directive';
@Directive({
selector: '[data-gc-listbox-item]',
standalone: false,
})
export class ListBoxItemDirective {
@Input('data-gc-listbox-item')
public item!: BaseIndexedItem;
@HostBinding('attr.id')
public itemId?: string;
@HostBinding('attr.role')
public readonly role = 'option';
// Does not work on JAWS
// some roles where this is used currently handle aria-selected manually, check usages of the directive before (re-)enabling this in the future
// @HostBinding('attr.aria-selected')
// get ariaSelected(): boolean {
// return this.selected;
// }
get key(): Key | symbol {
return this.item.key;
}
get selected(): boolean {
return this._listbox ? this._listbox.isKeySelected(this.key) : false;
}
get label(): string {
return this.item.label;
}
@HostBinding('attr.tabindex')
public get tabindex(): number | null {
// a tabindex of -1 allows the node to get the native focus
if (this._listbox?.focusMode === 'native') {
return -1;
} else {
return null;
}
}
@HostBinding('class.gc-selected')
get classSelected(): boolean {
return this.selected;
}
@HostBinding('class.gc-focused')
get classFocused(): boolean {
return this.isFocused();
}
/** @ignore */
private readonly el = inject<ElementRef<HTMLElement>>(ElementRef);
// Injecting the parent listbox fails in Storybook, hence the ListBoxDirective
// registers itself via `updateItem()` instead (formerly MenuDirective):
// private readonly listbox = inject(ListBoxDirective);
private _listbox?: ListBoxDirective;
@HostListener('click', ['$event'])
_handleMenuItemClicked(event: MouseEvent): void {
if (this._listbox?.focusMode === 'virtual') {
this.focus();
}
this._listbox?.selectItem(this.item.key, 'space');
event.preventDefault();
}
@HostListener('mousedown', ['$event'])
_handleMenuItemMouseDown(event: MouseEvent): void {
if (this._listbox?.focusMode === 'virtual') {
event.preventDefault();
}
}
@HostListener('keydown', ['$event'])
_handleMenuItemKeyDown(event: KeyboardEvent): void {
this._listbox?.handleKeyDown(event);
}
updateItem(listbox: ListBoxDirective): void {
this._listbox = listbox;
if (typeof this.key === 'string') {
this.itemId = `${listbox.listboxId ?? ''}_k_${this.key}`;
} else {
this.itemId = `${listbox.listboxId ?? ''}_s_${
this.key.description ?? String(this.key)
}`;
}
}
isFocused(): boolean {
if (this._listbox) {
return this._listbox.isFocused(this);
} else {
return false;
}
}
focus(): void {
this._listbox?.focusItem(this);
}
focusNative(): void {
this.el.nativeElement.focus();
}
scrollIntoView(): void {
this.el.nativeElement.scrollIntoView({
block: 'nearest',
inline: 'nearest',
});
}
}
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