All files / auto-collapsable-list si-auto-collapsable-list-item.directive.ts

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/**
 * Copyright (c) Siemens 2016 - 2025
 * SPDX-License-Identifier: MIT
 */
import { AfterViewInit, booleanAttribute, computed, Directive, input, signal } from '@angular/core';
 
import { SiAutoCollapsableListMeasurable } from './si-auto-collapsable-list-measurable.class';
 
@Directive({
  selector: '[siAutoCollapsableListItem]',
  host: {
    '[style.visibility]': 'isVisible() ? "visible" : "hidden"',
    '[style.position]': 'isVisible() ? "" : "absolute"',
    // Ensure hidden items are behind the visible ones. Otherwise, the visible ones are not clickable
    '[style.z-index]': 'isVisible() ? "" : "-1"'
  },
  exportAs: 'siAutoCollapsableListItem'
})
export class SiAutoCollapsableListItemDirective
  extends SiAutoCollapsableListMeasurable
  implements AfterViewInit
{
  /**
   * Hide this item even if enough space is available.
   * When calculating the overall available size, this item is still considered when forceHide=true
   *
   * @defaultValue false
   */
  readonly forceHide = input(false, { transform: booleanAttribute });
 
  /**
   * True if enough space is available for this item.
   *
   * @defaultValue false
   */
  readonly canBeVisible = signal<boolean>(false);
 
  /**
   * True if this item is actually visible to the user
   */
  readonly isVisible = computed(() => this.canBeVisible() && !this.forceHide());
 
  ngAfterViewInit(): void {
    Iif (getComputedStyle(this.elementRef.nativeElement).display === 'inline') {
      console.error('siAutoCollapsibleListItem does not work on items with display="inline"');
    }
  }
}