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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
ChangeDetectionStrategy,
Component,
ElementRef,
IterableDiffers,
TemplateRef,
effect,
input,
model,
output,
viewChild,
} from '@angular/core';
import { IndexedItem, textToLine } from '../utils/internal-utils';
import { Converter, FormControlStatus, Item } from '../utils/util.types';
import { SoundType, isItem, playSound } from '../utils/utilities';
import {
AutoIdDirective,
LabelContainerComponent,
} from '../internal/label-container/label-container.component';
import { BasePickerComponent } from './base-picker.component';
/**
* Alignment to use by the popup
* <ul>
* <li>Start: aligned to the left edge of the picker</li>
* <li>Fill: fills the complete width of the picker</li>
* <li>End: aligned to the right edge of the picker</li>
* </ul>
*/
export type PopupAlignment = 'start' | 'end' | 'fill';
/**
* A Picker allowing the user to choose an item from a collapsible list of options.
*/
@Component({
selector: 'gc-picker',
templateUrl: './picker.component.html',
styleUrls: [
'../base-range-input-field/base-slot-mode.css',
'./picker.component.css',
],
changeDetection: ChangeDetectionStrategy.Default,
standalone: false,
})
export class PickerComponent<T> extends BasePickerComponent<T, Item> {
/** @ignore */
protected get noValueItemAriaLabel(): string {
return (
'Keine Auswahl' +
(this.storage.selectedItem?.key === this.noValueListboxItem.key
? ' Selektiert'
: '')
);
}
/** The label that shows on the input. */
public label = input('');
/** Marks the input field as required. true == required */
public required = input(false);
/** A hint message that will appear below the picker if set. */
public hint = input('');
/** Optional icon provider to use for the selected entry */
public iconProvider = input<TemplateRef<unknown>>();
/** Optional icon provider to use for the entries in the popup list */
public listIconProvider = input<TemplateRef<unknown>>();
/** variant of the picker */
public variant = input<'default' | 'condensed' | 'toggle-list'>('default');
/**
* Defines how the content is displayed for the toggle-list variant:
* - icon-only: only the icon is shown
* - icon-left: icon is shown on the left of the text
* - text-only: only text is displayed
*/
public contentDisplay = input<'icon-left' | 'icon-only' | 'text-only'>(
'text-only',
);
/**
* Alignment of the picker popup.
*/
public popupAlignment = input<PopupAlignment>('fill');
/**
* If true, the component will be rendered in a slot-element mode.
* This enables the component to be used in two-slot components (e.g. `gc-two-slot-label-container`).
* @ignore
*/
public _slotElementMode = input<
'two-slot-label-container' | 'ext-search-single-field'
>();
/**
* Error message id used when `_slotElementMode` is enabled.
* @ignore
*/
public _errorMessageId = input<string>();
/**
* Info (hint) message id used when `_slotElementMode` is enabled.
* @ignore
*/
public _infoMessageId = input<string>();
/** Decides whether large or small icons appearing. */
public smallIcons = input(false);
/**
* Overrides the default text which is shown when the control is readonly and empty.
*/
public readonlyEmptyValue = input('');
/**
* Enables setting of the value only when the Promise resolves with value "true".
*/
public permitValueChange =
input<(v: T | null) => Promise<boolean> | boolean>();
/**
* Enables resetting the value i.e. the selection of a no-value (undefined) item.
*/
public resetEnabled = input(false);
/**
* Signals changes of the current (combined) status of the component, e.g. also reports errors triggered by internal
* validation or input handling.
*/
public readonly onStatusChange = output<FormControlStatus>();
/**
* The value represents the selected value
*/
public value = model<T | null>(null);
/** An error message that will appear below the picker if set. */
public errorMessage = input('');
/** @ignore */
protected readonly noValueListboxItem: Item = {
key: '__no-value', // TODO: switch to symbol and add support for it in ItemStorage
label: '\u2013',
};
/** @ignore */
private labelContainer = viewChild(LabelContainerComponent);
/** @ignore */
private drawerSlot = viewChild<ElementRef>('drawerSlot');
constructor(itDiff: IterableDiffers) {
super(itDiff);
effect(() => {
const errorMessage = this.errorMessage();
const status: FormControlStatus = {};
if (errorMessage) {
status.error = [errorMessage];
}
queueMicrotask(() => {
this.onStatusChange.emit(status);
});
});
effect(() => {
if (this.resetEnabled()) {
this.storage.selected = this.value();
} else {
this.storage.selected = this.value() ?? undefined;
}
});
effect(() => {
const resetEnabled = this.resetEnabled();
const items = this.items();
this.itemAdapter();
this.storage.values = resetEnabled ? [null, ...items] : items;
this.storage.update();
});
}
/** @ignore */
protected override getAnker(): ElementRef {
const labelContainer = this.labelContainer();
const drawerSlot = this.drawerSlot();
if (labelContainer) {
return labelContainer.drawerSlot();
} else if (drawerSlot) {
return drawerSlot;
}
throw new Error('Unable to find a drawer slot');
}
/** @ignore */
protected override getScrollTarget(): ElementRef<HTMLElement> | undefined {
return this.labelContainer()?.boxEl();
}
/** @ignore */
protected _processItemText(text: string) {
return textToLine(text, 32, '<br>');
}
/** @ignore */
protected _listboxId(autoId: AutoIdDirective): string {
return autoId.autoId + '-listbox';
}
/** @ignore */
protected getFocusedItemId(autoId: AutoIdDirective): string | undefined {
if (this.focusItem === undefined) {
return undefined;
}
return this.getItemId(autoId, this.focusItem);
}
/** @ignore */
protected getItemId(
autoId: AutoIdDirective,
item: IndexedItem<T | null>,
): string {
return autoId.autoId + '_k_' + item.key;
}
/** @ignore */
protected _itemTrackBy = (item: IndexedItem<T | null>) => {
return item.item.key;
};
/** @ignore */
protected isItemSelected(item?: IndexedItem<T | null>): boolean {
return this.storage.selectedItem?.key === item?.key;
}
/** @ignore */
protected isItemFocused(item?: IndexedItem<T | null>): boolean {
return (
(this.focusItem === undefined && item === undefined) ||
this.focusItem?.key === item?.key
);
}
/** @ignore */
protected override createInternalItemAdapter(
itemAdapter?: Converter<T, Item>,
): Converter<T | null, Item> {
return (value: T | null): Item => {
if (isItem(value)) {
return value;
} else if (value === null) {
return {
label: this.noValueListboxItem.label,
key: this.noValueListboxItem.key,
};
} else if (itemAdapter) {
return itemAdapter(value);
}
console.error('Missing converter for ', value);
throw new Error('missing converter');
};
}
/** @ignore */
protected override selectAndCloseCallback(item: IndexedItem<T | null>): void {
void this._impl_handleChange(item.value);
}
/** @ignore */
private async _impl_handleChange(value: T | null): Promise<void> {
const doChange = () => {
this.value.set(value);
this.storage.selected = value;
// We need to wait a tick so that the control is back
// in a sync state
setTimeout(() => {
if (
this.errorMessage().length > 0 ||
this._errorMessageId() !== undefined
) {
void playSound(SoundType.ERROR, [
'FIELD',
'ERROR',
'VALIDATION_ERROR',
]);
}
});
};
if (value !== this.value()) {
const permitValueChange = this.permitValueChange();
if (permitValueChange !== undefined) {
// Close the dialog we'll anyways loose focus to the dialog
this._impl_close(false);
const permit = permitValueChange(value);
if (typeof permit !== 'boolean') {
// permit is of type Promise<boolean>
const proceed = await permit;
if (proceed) {
doChange();
}
} else if (permit) {
// permit is of type boolean
doChange();
}
// Move focus back to ourselves
setTimeout(() => {
this.focusChild();
});
} else {
doChange();
}
}
}
}
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