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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
AfterViewInit,
ChangeDetectorRef,
Component,
ElementRef,
EventEmitter,
Input,
OnDestroy,
Output,
QueryList,
ViewChild,
ViewChildren,
} from '@angular/core';
import { FocusableElementOwner } from '../utils/util.types';
import { FocusScopeDirective } from '../internal/focus-scope.directive';
import { AutoIdDirective } from '../internal/label-container/label-container.component';
import { OverlayContainerComponent } from '../internal/overlay-container/overlay-container.component';
import { AutoCompleteDirective } from '../text-input-field/auto-complete/auto-complete.directive';
/**
* `gc-search-input-field` is a text field designed for searches. It triggers a passed function when the
* search action is performed.
*/
@Component({
selector: 'gc-search-input-field',
templateUrl: './search-input-field.component.html',
styleUrls: [
'./../utils/styles/reset-button.css',
'./search-input-field.component.css',
'./../text-input-field/auto-complete/auto-complete.style.css',
],
standalone: false,
})
export class SearchInputComponent
extends AutoCompleteDirective
implements FocusableElementOwner, OnDestroy, AfterViewInit
{
/**
* Custom ID to use.
*/
@Input()
public id?: string;
/**
* The label that shows on the input. Also used as placeholder value.
*/
@Input()
public label = '';
/**
* If set to true the state of the input is set to disabled which means that it is no longer possible to type text inside the input.
*/
@Input()
public disabled = false;
/**
* Function that will be fired on value submission.
*/
@Output()
public readonly valueChange: EventEmitter<string> =
new EventEmitter<string>();
/**
* Function that will be fired when an item from the auto-complete list is selected
*/
@Output()
public readonly onAutoCompleteSelected: EventEmitter<string> =
new EventEmitter<string>();
/**
* Currently typed text in the input field.
*/
@Input()
public value = '';
/**
* Hint message that appears below the input field.
*/
@Input()
public hint = '';
/**
* If set the value of the search input will be emitted after the passed number of milliseconds after the last key press.
*/
@Input()
public autoEmitDelay?: number;
/**
* Highlight auto-complete results only when prefix matches
* @default true
*/
@Input()
public autoCompletePrefixOnly = true;
/**
* If true the value of the search field doesn't get updated when item from auto complete list gets selected
*/
@Input()
public autoCompletePreventUpdate = false;
/** @ignore */
@ViewChild(FocusScopeDirective)
protected focusScope?: FocusScopeDirective;
/** @ignore */
@ViewChild(AutoIdDirective)
protected autoId!: AutoIdDirective;
/** @ignore */
@ViewChild('popup')
protected popup?: OverlayContainerComponent;
/** @ignore */
@ViewChildren('autocompleteItem')
protected autocompleteItems?: QueryList<ElementRef<HTMLElement>>;
/** @ignore */
@ViewChild('searchInput')
private searchInput!: ElementRef<HTMLInputElement>;
/** @ignore */
protected override get popupAnker(): undefined | ElementRef<HTMLElement> {
return this.searchInput;
}
/** @ignore */
protected override get popupScrollTarget():
| undefined
| ElementRef<HTMLElement> {
return undefined;
}
/**
* @ignore
*/
public _focused = false;
/**
* @ignore
*/
private inputTimeout?: ReturnType<typeof setTimeout>;
/**
* @ignore
*/
private previousEmitValue = '';
constructor(change: ChangeDetectorRef) {
super(change, true);
}
public focusChild(): boolean {
if (!this.disabled) {
this.searchInput.nativeElement.focus();
return true;
} else {
return false;
}
}
/**
* @ignore
*/
public async _onInput(event: Event): Promise<void> {
this.value = (event.target as HTMLInputElement).value;
await this._autoCompleteOnInput(this.value);
}
/**
* @ignore
*/
public _hasFocus(val: boolean): void {
this._focused = val;
if (!val && this._impl_drawerOpen) {
this._hideCompletions();
}
}
/**
* @ignore
*/
public _onClear(): void {
this.value = '';
this.searchInput.nativeElement.focus();
this._hideCompletions(true);
this.scheduleAutoEmit();
}
/**
* @ignore
*/
public _handleStartSearch(): void {
this._updateValue();
this.searchInput.nativeElement.focus();
}
/** @ignore */
public ngOnDestroy(): void {
if (this.inputTimeout) {
clearTimeout(this.inputTimeout);
this.inputTimeout = undefined;
}
}
/** @ignore */
protected override focusInputField(): void {
this.focusChild();
}
/** @ignore */
protected override _handleAutoCompleteSelection(text: string) {
this.onAutoCompleteSelected.emit(text);
if (!this.autoCompletePreventUpdate) {
this.value = text;
}
}
/** @ignore */
protected override _handleChange() {
if (!this.autoCompletePreventUpdate) {
this._updateValue();
}
return Promise.resolve();
}
/** @ignore */
protected async _handleInputKeyDown(evt: KeyboardEvent): Promise<void> {
this.scheduleAutoEmit();
switch (evt.key) {
case 'ArrowDown':
this._popup_focusNext();
evt.preventDefault();
break;
case 'ArrowUp':
this._popup_focusPrev();
evt.preventDefault();
break;
case 'Enter':
if (this._impl_drawerOpen && this._popup_focused) {
await this._popup_applyFocused();
} else {
this._updateValue();
}
evt.preventDefault();
break;
case 'Escape':
if (this._impl_drawerOpen) {
this._hideCompletions();
} else {
this.value = '';
}
evt.preventDefault();
break;
default:
break;
}
}
/** @ignore */
private scheduleAutoEmit(): void {
if (this.autoEmitDelay) {
if (this.inputTimeout !== undefined) {
clearTimeout(this.inputTimeout);
this.inputTimeout = undefined;
}
this.inputTimeout = setTimeout(
this._updateValue.bind(this, true),
this.autoEmitDelay,
);
}
}
/**
* @ignore
*/
private _updateValue(autoEmit = false): void {
if (this.inputTimeout !== undefined) {
// cancel pending auto-submit to avoid repeated events after submitting via "Enter" or search button
clearTimeout(this.inputTimeout);
this.inputTimeout = undefined;
}
// do not emit value change if the value is not changed during the auto-submit
if (!autoEmit || this.previousEmitValue !== this.value) {
this.valueChange.emit(this.value);
this.previousEmitValue = this.value;
}
}
}
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