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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
Component,
ElementRef,
EventEmitter,
Input,
IterableDiffers,
OnChanges,
Optional,
Output,
SimpleChanges,
TemplateRef,
ViewChild,
} from '@angular/core';
import { BaseIndexedItem, textToLine } from '../utils/internal-utils';
import { FormControlStatus, Item, WidgetKeySet } from '../utils/util.types';
import { SoundType, createWidgetKeySet, playSound } from '../utils/utilities';
import { ElementInsertionContextService } from '../internal/element-insertion-context.service';
import {
AutoIdDirective,
LabelContainerComponent,
} from '../internal/label-container/label-container.component';
import { SelectionEvent } from '../internal/listbox.directive';
import { BasePickerComponent, KeyFocusTarget } 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';
const NO_VALUE_ITEM_SYMBOL: unique symbol = Symbol('no-value');
/**
* 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',
],
})
export class PickerComponent<T, I extends Item = Item>
extends BasePickerComponent<T, I>
implements OnChanges
{
/** Inform about the change of the selection state */
@Output()
public readonly valueChange: EventEmitter<T | null> =
new EventEmitter<T | null>();
/** The label that shows on the input. */
@Input()
public label = '';
/** Marks the input field as required. true == required */
@Input()
public required = false;
/** A hint message that will appear below the picker if set. */
@Input()
public hint = '';
/** Optional icon provider to use for the selected entry */
@Input()
public iconProvider?: TemplateRef<unknown>;
/** Optional icon provider to use for the entries in the popup list */
@Input()
public listIconProvider?: TemplateRef<unknown>;
/** variant of the picker */
@Input()
public variant: '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
*/
@Input()
public contentDisplay: 'icon-left' | 'icon-only' | 'text-only' = 'text-only';
/**
* Alignment of the picker popup.
*/
@Input()
public popupAlignment: 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
*/
@Input()
public _slotElementMode?:
| 'two-slot-label-container'
| 'ext-search-single-field';
/**
* Error message id used when `_slotElementMode` is enabled.
* @ignore
*/
@Input()
public _errorMessageId?: string;
/**
* Info (hint) message id used when `_slotElementMode` is enabled.
* @ignore
*/
@Input()
public _infoMessageId?: string;
/** Decides whether large or small icons appearing. */
@Input()
public smallIcons = false;
/**
* Overrides the default text which is shown when the control is readonly and empty.
*/
@Input()
public readonlyEmptyValue = '';
/**
* Enables setting of the value only when the Promise resolves with value "true".
*/
@Input()
public permitValueChange?: (v: T | null) => Promise<boolean> | boolean;
/**
* Signals changes of the current (combined) status of the component, e.g. also reports errors triggered by internal
* validation or input handling.
*/
@Output()
public readonly onStatusChange: EventEmitter<FormControlStatus> =
new EventEmitter<FormControlStatus>(true);
/** @ignore */
@ViewChild(LabelContainerComponent)
public labelContainer?: LabelContainerComponent;
/** @ignore */
@ViewChild('drawerSlot')
public drawerSlot?: ElementRef;
/**
* Enables resetting the value i.e. the selection of a no-value (undefined) item.
*/
@Input()
public get resetEnabled() {
return this._resetEnabled;
}
public set resetEnabled(value) {
this.storage.startingIndex = value ? this.noValueListboxItem.index + 1 : 0;
this._resetEnabled = value;
}
/**
* The value represents the selected value
*/
@Input()
public get value(): T | null {
return this.storage.selected ?? null;
}
public set value(value: T | null) {
this.storage.selected = value ?? undefined;
}
/** An error message that will appear below the picker if set. */
@Input()
public set errorMessage(message: string) {
if (this._errorMessage !== message) {
this._errorMessage = message;
this.emitStatusChange();
}
}
public get errorMessage(): string {
return this._errorMessage;
}
/** @ignore */
protected readonly noValueListboxItem: BaseIndexedItem = {
index: 0,
key: NO_VALUE_ITEM_SYMBOL,
label: '\u2013',
};
/** @ignore */
protected readonly _widgetKeys: WidgetKeySet =
createWidgetKeySet('gc-picker-input');
/** @ignore */
protected _focused?: boolean;
/** @ignore */
protected readonly inDialog: boolean; // Workaround for https://gitlab.bestsolution.at/gefa/gefa-web-controls/-/issues/2670
private _errorMessage = '';
/** @ignore */
private _resetEnabled = false;
constructor(
itDiff: IterableDiffers,
@Optional() eic: ElementInsertionContextService | null,
) {
super(itDiff);
this.inDialog = eic?.parent.localName === 'dialog';
}
/** @ignore */
ngOnChanges(changes: SimpleChanges): void {
if (
'resetEnabled' in changes ||
'items' in changes ||
'itemAdapter' in changes
) {
this.storage.update();
}
}
/** @ignore */
public override getAnker(): ElementRef {
if (this.labelContainer) {
return this.labelContainer.drawerSlot;
} else if (this.drawerSlot) {
return this.drawerSlot;
}
throw new Error('Unable to find a drawer slot');
}
/** @ignore */
public override getScrollTarget(): ElementRef<HTMLElement> | undefined {
return this.labelContainer?.boxEl;
}
/**
* @ignore
*/
public _processItemText(text: string) {
return textToLine(text, 32, '<br>');
}
/** @ignore */
public override _impl_onFocusLeft(relatedTarget?: EventTarget | null): void {
super._impl_onFocusLeft(relatedTarget);
// 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);
}
});
}
/** @ignore */
public async _impl_onSelect(event: SelectionEvent): Promise<void> {
if (typeof event.key === 'string' && !this._isDisabled(event.key)) {
const value = this.storage.getValueByKey(event.key) ?? null;
await this._impl_handleChange(value);
} else if (event.key === NO_VALUE_ITEM_SYMBOL) {
await this._impl_handleChange(null);
}
this._impl_close(true);
}
/** @ignore */
public async _impl_handleChange(value: T | null): Promise<void> {
const doChange = () => {
this.value = value;
this.valueChange.emit(value);
};
if (value !== this.value) {
if (this.permitValueChange !== undefined) {
// Close the dialog we'll anyways loose focus to the dialog
this._impl_close(false);
const permit = this.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();
}
}
}
/** @ignore */
protected _impl_onOpen(focusItem: KeyFocusTarget): KeyFocusTarget {
// always open selected value if set
if (this.value != undefined) {
const key = this.storage.getItemByValue(this.value)?.key;
if (key != undefined) {
focusItem = key;
}
}
return focusItem;
}
/** @ignore */
protected _listboxId(autoId: AutoIdDirective): string {
return autoId.autoId + '_listbox';
}
/** @ignore */
protected determineListBoxValue(): string | symbol {
return this.storage._selectedKey ?? this.noValueListboxItem.key;
}
/** @ignore */
protected getLabelId(): string {
return this._widgetKeys.labelKey;
}
/** @ignore */
protected getButtonId(): string {
return this._widgetKeys.baseKey + '-button';
}
/** @ignore */
protected getListboxId(): string {
return this._widgetKeys.labelKey + '-listbox';
}
/** @ignore */
protected computeAriaDescribedBy(): string | null {
const errId = this._errorMessageId;
const hintId = this._infoMessageId;
if (errId && hintId) {
return errId + ' ' + hintId;
} else if (errId) {
return errId;
} else if (hintId) {
return hintId;
} else {
return null;
}
}
/** @ignore */
private emitStatusChange() {
const status: FormControlStatus = {};
if (this.errorMessage) {
status.error = [this.errorMessage];
}
this.onStatusChange.emit(status);
}
}
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