All files / modal si-modal.component.ts

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/**
 * Copyright (c) Siemens 2016 - 2026
 * SPDX-License-Identifier: MIT
 */
import { A11yModule } from '@angular/cdk/a11y';
import {
  AfterViewInit,
  ChangeDetectionStrategy,
  Component,
  ElementRef,
  inject,
  OnDestroy,
  OnInit,
  signal,
  viewChild,
  DOCUMENT
} from '@angular/core';
 
import { ModalRef } from './modalref';
 
@Component({
  selector: 'si-modal',
  imports: [A11yModule],
  templateUrl: './si-modal.component.html',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    '(mousedown)': 'clickStarted($event)',
    '(mouseup)': 'onClickStop($event)',
    '(window:keydown.esc)': 'onEsc($event)'
  }
})
export class SiModalComponent implements OnInit, AfterViewInit, OnDestroy {
  protected readonly modalRef = inject(ModalRef<unknown, any>);
 
  protected readonly dialogClass = this.modalRef.dialogClass ?? '';
  protected readonly titleId = this.modalRef.data?.ariaLabelledBy ?? '';
  protected init = false;
  protected readonly show = signal(false);
  protected readonly showBackdropClass = signal<boolean | undefined>(undefined);
 
  private clickStartInDialog = false;
  private origBodyOverflow?: string;
  private showTimer: any;
  private backdropTimer: any;
  private backdropGhostClickPrevention = true;
  private readonly document = inject(DOCUMENT);
 
  private readonly modalContainerRef = viewChild.required<ElementRef>('modalContainer');
 
  ngOnInit(): void {
    setTimeout(() => (this.backdropGhostClickPrevention = false), this.animationTime(300));
    this.init = true;
    this.showTimer = setTimeout(() => {
      this.show.set(true);
    }, this.animationTime(150));
  }
 
  ngAfterViewInit(): void {
    queueMicrotask(() => this.modalRef?.shown.next(this.modalContainerRef()));
  }
 
  ngOnDestroy(): void {
    this.hideBackdrop();
  }
 
  /** @internal */
  hideDialog(param?: any): void {
    clearTimeout(this.showTimer);
 
    this.show.set(false);
    // set `detach()` in modal ref to no-op so that the animation is unaffected if called
    const detach = this.modalRef.detach;
    this.modalRef.detach = () => {};
 
    setTimeout(() => {
      this.hideBackdrop();
      setTimeout(() => detach(), this.animationTime(150));
    }, this.animationTime(300));
 
    this.modalRef?.hidden.next(param);
    this.modalRef?.hidden.complete();
    this.modalRef?.message.complete();
  }
 
  /** @internal */
  showBackdrop(): void {
    if (this.modalRef?.data.animated !== false) {
      this.showBackdropClass.set(false);
      this.backdropTimer = setTimeout(() => {
        this.showBackdropClass.set(true);
      }, 16);
    } else E{
      this.showBackdropClass.set(true);
    }
    this.origBodyOverflow = this.document.body.style.overflow;
    this.document.body.style.overflow = 'hidden';
  }
 
  private hideBackdrop(): void {
    clearTimeout(this.backdropTimer);
    if (this.showBackdropClass() !== undefined) {
      this.showBackdropClass.set(false);
    }
    if (this.origBodyOverflow !== undefined) {
      this.document.body.style.overflow = this.origBodyOverflow;
      this.origBodyOverflow = undefined;
    }
  }
 
  protected clickStarted(event: MouseEvent): void {
    this.clickStartInDialog = event.target !== this.modalContainerRef().nativeElement;
  }
 
  protected onClickStop(event: MouseEvent): void {
    const clickedInBackdrop =
      event.target === this.modalContainerRef().nativeElement && !this.clickStartInDialog;
    Iif (this.modalRef?.ignoreBackdropClick || !clickedInBackdrop) {
      this.clickStartInDialog = false;
      return;
    }
 
    if (!this.backdropGhostClickPrevention) {
      // Called when backdrop close is allowed and user clicks on the backdrop
      this.modalRef.messageOrHide(this.modalRef.closeValue);
    } else {
      // When in ghost click prevention mode, avoid text selection
      this.document.getSelection()?.removeAllRanges();
    }
  }
 
  protected onEsc(event: Event): void {
    Iif (this.modalRef?.data.keyboard && this.modalRef?.isCurrent()) {
      event.preventDefault();
      this.modalRef.messageOrHide(this.modalRef.closeValue);
    }
  }
 
  private animationTime(millis: number): number {
    return this.modalRef?.data.animated !== false ? millis : 0;
  }
}