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* Copyright (c) Siemens 2016 - 2025
* SPDX-License-Identifier: MIT
*/
import {
AfterViewInit,
booleanAttribute,
ComponentRef,
Directive,
ElementRef,
HostListener,
inject,
input
} from '@angular/core';
import { NG_VALIDATORS, NG_VALUE_ACCESSOR } from '@angular/forms';
import { SI_FORM_ITEM_CONTROL } from '@siemens/element-ng/form';
import { Subscription } from 'rxjs';
import { SiDateInputDirective } from './si-date-input.directive';
import { SiDatepickerOverlayComponent } from './si-datepicker-overlay.component';
import { SiDatepickerOverlayDirective } from './si-datepicker-overlay.directive';
import { getDatepickerFormat } from './si-datepicker.model';
@Directive({
selector: '[siDatepicker]',
providers: [
{
provide: NG_VALUE_ACCESSOR,
useExisting: SiDatepickerDirective,
multi: true
},
{
provide: NG_VALIDATORS,
useExisting: SiDatepickerDirective,
multi: true
},
{
provide: SI_FORM_ITEM_CONTROL,
useExisting: SiDatepickerDirective
}
],
hostDirectives: [
{
directive: SiDatepickerOverlayDirective,
outputs: ['siDatepickerClose']
}
],
exportAs: 'siDatepicker'
})
export class SiDatepickerDirective extends SiDateInputDirective implements AfterViewInit {
/**
* Automatically close overlay on date selection.
* Do not use this behavior with config showTime = true, because it
* will close the overlay when the user change one of the time units.
*
* @defaultValue false
*/
readonly autoClose = input(false, { transform: booleanAttribute });
/**
* During focus on close the datepicker will not show since we recover the focus on element.
* The focus on close is only relevant when the directive is configured without a calendar button.
*/
private overlaySubscriptions?: Subscription[];
private externalTrigger?: ElementRef<HTMLElement>;
private readonly overlayToggle = inject(SiDatepickerOverlayDirective);
ngAfterViewInit(): void {
// Update datepicker with new date value
this.dateChange.subscribe(date => this.overlayToggle.setInputs({ date }));
}
/** @internal */
touch(): void {
this.onTouched();
}
/**
* On click shall show datepicker.
*/
@HostListener('click')
protected onClick(): void {
if (!this.externalTrigger) {
this.show();
}
}
/**
* Focus out shall close the datepicker except we are moving the focus to the datepicker.
* @param event - focus out event with the related target
*/
protected override onBlur(event: FocusEvent): void {
const target = event.relatedTarget as HTMLElement;
if (!this.externalTrigger && !this.overlayToggle.contains(target)) {
this.overlayToggle.closeOverlay();
this.onTouched();
}
}
@HostListener('keydown.tab')
protected onTab(): void {
Iif (this.overlayToggle.isShown()) {
this.overlayToggle.closeOverlay();
}
}
/**
* @internal
*/
public show(initialFocus = false): void {
if (this.disabled() || this.readonly() || this.overlayToggle.isShown()) {
return;
}
this.subscribeDateChanges(
this.overlayToggle.showOverlay(initialFocus, {
config: this.siDatepickerConfig(),
date: this.date,
time12h: this.getTime12h()
})
);
}
/**
* @internal
*/
public useExternalTrigger(element: ElementRef<HTMLElement>): void {
this.externalTrigger = element;
}
@HostListener('focus')
protected focusChange(): void {
if (!this.externalTrigger) {
this.show();
}
}
private getTime12h(): boolean | undefined {
const dateFormat = getDatepickerFormat(this.locale, this.siDatepickerConfig(), true);
return dateFormat?.includes('a');
}
private subscribeDateChanges(overlay?: ComponentRef<SiDatepickerOverlayComponent>): void {
this.overlaySubscriptions?.forEach(s => s.unsubscribe());
overlay?.instance.date.subscribe(d => this.onDateChanged(d));
overlay?.instance.disabledTimeChange.subscribe(d => this.onDisabledTime(d));
}
/**
* Callback when the datepicker changes his value.
* @param date - updated date
*/
protected override onDateChanged(date?: Date): void {
// While typing a date can be invalid and the datepicker component will automatically change the date to undefined.
// Since we don't want to reset the current input value it is necessary to ignore those updates.
if (!date) {
return;
}
super.onDateChanged(date);
if (this.autoClose()) {
// a tick later so the event won't end on the wrong element
setTimeout(() => this.overlayToggle.closeAfterSelection());
}
}
}
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