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| /*******************************************************************************
* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
AfterViewInit,
Component,
ContentChildren,
Directive,
ElementRef,
EventEmitter,
HostListener,
Input,
OnChanges,
Optional,
Output,
QueryList,
SimpleChanges,
TemplateRef,
ViewChild,
ViewChildren,
} from '@angular/core';
import {
IndexedItem,
isOnlyAltPressedOrNothing,
} from '../utils/internal-utils';
import {
Converter,
FocusableElementOwner,
FormControlStatus,
InvalidControlValue,
Item,
Nullable,
OptionalNullable,
hasSublabel,
} from '../utils/util.types';
import {
SoundType,
isInvalidControlValue,
isItem,
playSound,
} from '../utils/utilities';
import { ElementInsertionContextService } from '../internal/element-insertion-context.service';
import {
AutoIdDirective,
LabelContainerComponent,
} from '../internal/label-container/label-container.component';
import { OverlayContainerComponent } from '../internal/overlay-container/overlay-container.component';
import { TextInputComponent } from '../text-input-field/text-input-field.component';
@Directive({
selector: '[data-gc-combobox-option]',
})
export class ComboBoxOptionDirective<T, I extends Item> {
@Input('data-gc-combobox-option')
public item: IndexedItem<T, I> | undefined;
constructor(private el: ElementRef) {}
scrollIntoView(): void {
const element = this.el.nativeElement as HTMLElement;
element.scrollIntoView({ block: 'nearest', inline: 'nearest' });
}
}
@Directive({
selector: '[data-gc-combobox-list]',
})
export class ComboBoxListDirective<T, I extends Item> {
@ContentChildren(ComboBoxOptionDirective)
public options!: QueryList<ComboBoxOptionDirective<T, I>>;
scrollIntoView(value: IndexedItem<T, I>): void {
const valId = value.key;
const found = this.options.find((op: ComboBoxOptionDirective<T, I>) => {
if (op.item === undefined) {
return false;
}
const opId = op.item.key;
return valId == opId;
});
found?.scrollIntoView();
}
scrollToFirst(): void {
this.options.get(0)?.scrollIntoView();
}
}
const SELECT_ENTRY_MESSAGE =
'Bitte wählen Sie einen Eintrag aus der Trefferliste aus';
interface ItemLoadWithDisabled<T> {
result: readonly T[];
disabledItems: ReadonlySet<string>;
}
type ItemLoadResult<T> = readonly T[] | ItemLoadWithDisabled<T>;
function isItemLoadWithDisabled<T>(
result: ItemLoadResult<T>,
): result is ItemLoadWithDisabled<T> {
return !Array.isArray(result);
}
/**
* A ComboBox allowing the user to choose an item from a collapsible list of options by entering a text.
*/
@Component({
selector: 'gc-combobox',
templateUrl: './combobox.component.html',
styleUrls: ['./combobox.component.css'],
})
export class ComboBoxComponent<T, I extends Item = Item>
implements FocusableElementOwner, AfterViewInit, OnChanges
{
/**
* Custom ID to use
*/
@Input()
public id?: string;
/**
* Decides if the combobox will be rendered in a disabled/enabled state
*/
@Input()
public disabled = false;
/**
* Timeout (in milliseconds) to wait upon the user changed
* the text value in the comboxbox-field
*/
@Input()
public refreshTriggerTimeout = 400;
/**
* Enables resetting the value i.e. the selection of a no-value (undefined) item.
*/
@Input()
public resetEnabled = true;
/**
* Informs about the change of the selection state
*/
@Output()
public readonly valueChange: EventEmitter<Nullable<T | InvalidControlValue>> =
new EventEmitter<Nullable<T | InvalidControlValue>>();
/**
* 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);
/**
* Signals that the text value has changed. In contrast to "valueChange" this event is emitted immediately
* and provides the current (unprocessed) text visible in the control
*/
@Output()
public readonly onInputChange: EventEmitter<string> =
new EventEmitter<string>(true);
/** The function that provides the items. */
@Input()
public items?: (searchVal: string) => Promise<ItemLoadResult<T>>;
/** The adapter to convert the model items into Items. */
@Input()
public itemAdapter: Converter<T, I> | undefined;
/** 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>;
/** 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 combobox if set. */
@Input()
public hint = '';
/** 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 = '';
/**
* 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?: 'ext-search-single-field';
/**
* Error message id used when `_slotElementMode` is enabled.
* @ignore
*/
@Input()
public _errorMessageId?: string;
/** Fires if the combobox has focus. */
@Output()
public readonly onFocusEntered: EventEmitter<void> = new EventEmitter<void>();
/** Fires if the combobox has lost focus. */
@Output()
public readonly onFocusLeft: EventEmitter<void> = new EventEmitter<void>();
/** Fires if the combobox focus border visibility needs to be overridden. */
@Output()
public readonly _onHideFocusBorder: EventEmitter<boolean> =
new EventEmitter<boolean>();
/** @ignore */
@ViewChild('popup')
public popup?: OverlayContainerComponent;
/** @ignore */
@ViewChild(LabelContainerComponent)
public labelContainer?: LabelContainerComponent;
/** @ignore */
@ViewChild('drawerSlot')
public drawerSlot?: ElementRef;
/** @ignore */
@ViewChild('textInput')
public textInput?: ElementRef<HTMLInputElement>;
/** @ignore */
@ViewChild('readonlyTextInput')
public readonlyTextInput?: TextInputComponent;
/** @ignore */
@ViewChildren('li[role=option]')
public options!: QueryList<ElementRef>;
/** @ignore */
@ViewChild(ComboBoxListDirective)
public list!: ComboBoxListDirective<T, I>;
/** The current selected value or undefined to clear it */
@Input()
public value: Nullable<T | InvalidControlValue> = null;
/**
* Enables setting of the value only when the Promise resolves with value "true".
*/
@Input()
public permitValueChange?: (
v: T | null | InvalidControlValue,
) => Promise<boolean> | boolean;
/** @ignore */
@Input()
public _sizeHelperValue = '';
/** An error message that will appear below the combobox if set. */
@Input()
public set errorMessage(message: string) {
if (this._errorMessage !== message) {
this._errorMessage = message;
this.emitStatusChange();
}
}
public get errorMessage(): string {
return this._errorMessage;
}
/**
* Decides if the combobox renders in a readonly state.
*/
@Input()
public get readonly(): boolean {
return this._readonly;
}
public set readonly(value: boolean) {
this._readonly = value;
if (!value) {
this.connectPopup();
}
}
/** @ignore */
public set _impl_focusItem(value: OptionalNullable<IndexedItem<T, I>>) {
this.__impl_focusItem = value;
if (value) {
this.list.scrollIntoView(value);
} else {
this.list.scrollToFirst();
}
}
/** @ignore */
public get _impl_focusItem(): OptionalNullable<IndexedItem<T, I>> {
return this.__impl_focusItem;
}
/** @ignore */
protected get _combinedErrorMessage(): string {
return this.internalErrorMessage || this.errorMessage;
}
/** @ignore */
private set internalErrorMessage(message: string) {
if (message !== this._internalErrorMessage) {
this._internalErrorMessage = message;
this.emitStatusChange();
}
}
/** @ignore */
private get internalErrorMessage(): string {
return this._internalErrorMessage;
}
/** @ignore */
protected textValue = '';
/** @ignore */
protected disabledItems: ReadonlySet<string> = new Set();
/** @ignore */
protected _valueItem?: IndexedItem<T, I>;
/** @ignore */
protected _impl_loading = false;
/** @ignore */
protected _impl_empty = false;
/** @ignore */
protected _impl_showTextInput = false;
/** @ignore */
protected _impl_dropdownOpen = false;
/** @ignore */
protected _impl_speechMessage = '';
/** @ignore */
protected _impl_visibleItems: (IndexedItem<T, I> | undefined)[] = [];
/** @ignore */
protected __impl_focusItem: OptionalNullable<IndexedItem<T, I>>;
/** @ignore */
protected curSearchValue = '';
/** @ignore */
protected readonly inDialog: boolean; // Workaround for https://gitlab.bestsolution.at/gefa/gefa-web-controls/-/issues/2670
/** @ignore */
private curSearchTimeout?: number;
/** @ignore */
private clearMessageTimeout?: number;
/** @ignore */
private _readonly = false;
/** @ignore */
private _userInteraction = false;
/** @ignore */
private _lastLoadId = 0;
/** @ignore */
private _errorMessage = '';
/** @ignore */
private _internalErrorMessage = '';
/** @ignore */
private _cancel_selection_highlight = false;
/** @ignore */
private hasFocus = false;
constructor(@Optional() eic: ElementInsertionContextService | null) {
this.inDialog = eic?.parent.localName === 'dialog';
}
/** @ignore */
@HostListener('keydown', ['$event'])
onKeyDown(event: KeyboardEvent): void {
if (this._impl_dropdownOpen) {
this.onKeyDownDropdownOpen(event);
} else {
this.onKeyDownDropdownClosed(event);
}
}
/** @ignore */
public ngAfterViewInit(): void {
this.connectPopup();
if (this._valueItem) {
this.textValue = this._valueItem.label;
}
}
/** @ignore */
public ngOnChanges(changes: SimpleChanges): void {
if ('value' in changes || 'itemAdapter' in changes) {
// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
this.updateValue(changes.value.currentValue, true);
}
if ('resetEnabled' in changes) {
void this.updateItems();
}
}
public focusChild(): boolean {
if (this.disabled) {
return false;
} else if (this.readonly && this.readonlyTextInput) {
return this.readonlyTextInput.focusChild();
} else if (this.textInput) {
this.textInput.nativeElement.focus();
return true;
} else {
return false;
}
}
/** @ignore */
public 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 isFocused(): boolean {
return this.hasFocus;
}
/** @ignore */
protected button_onMouseDown(event: MouseEvent): void {
event.preventDefault();
}
/** @ignore */
protected button_onClick(event: MouseEvent): void {
if (this._impl_dropdownOpen) {
this.cancelAndClose();
event.preventDefault();
} else {
this.open();
event.preventDefault();
}
}
/** @ignore */
protected getFocusedItemId(autoId: AutoIdDirective): string | undefined {
if (this._impl_focusItem === null) {
return undefined;
}
return this.getItemId(autoId, this._impl_focusItem);
}
/** @ignore */
protected getItemId(
autoId: AutoIdDirective,
item: IndexedItem<T, I> | undefined,
): string {
if (item === undefined) {
return autoId.autoId + '_s_' + 'emptyItem';
}
return autoId.autoId + '_k_' + item.key;
}
/** @ignore */
protected input_onClick(event: MouseEvent): void {
if (!this._impl_dropdownOpen) {
this.open();
event.preventDefault();
}
}
/** @ignore */
protected contentArea_onMouseDown(): void {
this.textInput?.nativeElement.focus();
}
/** @ignore */
protected isItemSelected(item?: IndexedItem<T, I>): boolean {
return (
!this._cancel_selection_highlight && this._valueItem?.key == item?.key
);
}
/** @ignore */
protected isItemFocused(item?: IndexedItem<T, I>): boolean {
if (this._impl_focusItem === undefined && item === undefined) {
return true;
}
return this._impl_focusItem && this._impl_focusItem.key == item?.key
? true
: false;
}
/** @ignore */
protected input_onInput(text: string): void {
this.textValue = text;
this.onInputChange.emit(text);
// If the popup was not open it will trigger an item load
// with exactly this key so there's no need to schedule
if (!this.open()) {
this.delayFilter();
}
this._cancel_selection_highlight = true;
this._userInteraction = true;
}
/** @ignore */
protected async _impl_onFocusLeft(): Promise<void> {
this.cancelAndClose();
this.onFocusLeft.emit();
await this._impl_validate();
const playError = () => {
if (this._combinedErrorMessage.length > 0) {
void playSound(SoundType.ERROR);
}
};
if (!this._userInteraction) {
this._impl_showTextInput = false;
// We need to wait a tick so that the control is back
// in a sync state
setTimeout(playError);
return;
}
// We need to wait a tick so that the control is back
// in a sync state
setTimeout(playError);
}
/** @ignore */
protected input_onFocus(): void {
this._impl_showTextInput = true;
this.hasFocus = true;
this.onFocusEntered.emit();
}
/** @ignore */
protected itemTrackBy = (
_index: number,
item: IndexedItem<T, I> | undefined,
) => {
if (item === undefined) {
return undefined;
}
return item.item.key;
};
/** @ignore */
protected getTitle(item: IndexedItem<T, I> | undefined): string {
if (item === undefined) {
return '\u2013'; // = '–'
}
return item.item.label;
}
/** @ignore */
protected getAriaTitle(
item: IndexedItem<T, I> | undefined,
): string | undefined {
if (item === undefined) {
return 'Keine Auswahl';
}
return undefined;
}
/** @ignore */
protected getText(item: IndexedItem<T, I> | undefined): string | undefined {
if (item === undefined) {
return undefined;
}
if (hasSublabel(item.item)) {
return item.item.sublabel;
}
return undefined;
}
/** @ignore */
protected input_mousedown(event: MouseEvent): void {
event.preventDefault();
}
/** @ignore */
protected async input_onBlur(event: FocusEvent): Promise<void> {
if (this._impl_dropdownOpen && event.relatedTarget === null) {
this.hasFocus = true;
setTimeout(() => {
this.textInput?.nativeElement.focus();
});
this.cancelAndClose();
} else if (
event.relatedTarget &&
(event.relatedTarget as HTMLElement).dataset.gcRefuseFocus === 'true'
) {
// Workaround for https://gitlab.bestsolution.at/gefa/gefa-web-controls/-/issues/2670
const el = event.target as HTMLElement;
setTimeout(() => {
el.focus();
});
} else {
await this._impl_onFocusLeft();
this.hasFocus = false;
this._userInteraction = false;
}
}
/** @ignore */
protected item_mousedown(event: MouseEvent): void {
event.preventDefault();
}
/** @ignore */
protected item_mouseclick(item: IndexedItem<T, I> | undefined): void {
this.selectAndClose(item);
}
/** @ignore */
protected listboxId(autoId: AutoIdDirective): string {
return autoId.autoId + '_listbox';
}
/** @ignore */
protected _isDisabled(item: IndexedItem<T, I> | undefined): boolean {
return item ? this.disabledItems.has(item.key) : false;
}
/** @ignore */
private async _impl_validate(): Promise<void> {
if (this._impl_showTextInput) {
const found = await this._impl_autoSelect();
if (found) {
this._impl_showTextInput = false;
} else {
this._impl_showTextInput = true;
}
}
}
/** @ignore */
private getRelative(
ary: (IndexedItem<T, I> | undefined)[],
cur: IndexedItem<T, I> | undefined,
delta: number,
): IndexedItem<T, I> | undefined {
const idx = ary.findIndex(item => item?.key === cur?.key) + delta;
if (idx >= 0 && ary.length > idx) {
return ary[idx];
}
return cur;
}
/** @ignore */
private focusNextItem(): void {
if (this._impl_focusItem !== null) {
const next = this.getRelative(
this._impl_visibleItems,
this._impl_focusItem,
+1,
);
this._impl_focusItem = next;
}
}
/** @ignore */
private focusPrevItem(): void {
if (this._impl_focusItem !== null) {
const next = this.getRelative(
this._impl_visibleItems,
this._impl_focusItem,
-1,
);
this._impl_focusItem = next;
}
}
/** @ignore */
private focusFirstItem(): void {
this._impl_focusItem = this._impl_visibleItems[0];
}
/** @ignore */
private focusLastItem(): void {
this._impl_focusItem =
this._impl_visibleItems[this._impl_visibleItems.length - 1];
}
/** @ignore */
private open(postUpdateBlock?: () => void): boolean {
if (this.disabled) {
return false;
}
if (!this._impl_dropdownOpen) {
this._impl_dropdownOpen = true;
this.curSearchValue = this.textValue;
this._impl_showTextInput = true;
this._impl_focusItem = null;
void this.updateItems(postUpdateBlock);
this._onHideFocusBorder.emit(this.isFocused());
return true;
}
return false;
}
/** @ignore */
private cancelAndClose(): void {
if (this._impl_dropdownOpen) {
this._impl_dropdownOpen = false;
this._impl_showTextInput = true;
this._onHideFocusBorder.emit(
this.isFocused() && this._impl_focusItem !== null,
);
}
}
/** @ignore */
private selectAndClose(item: IndexedItem<T, I> | undefined): void {
if (this._isDisabled(item)) {
this._impl_focusItem = item;
} else if (this._impl_dropdownOpen) {
this._impl_dropdownOpen = false;
this._impl_showTextInput = false;
this._onHideFocusBorder.emit(
this.isFocused() && this._impl_focusItem !== null,
);
void this.updateUserValue(item?.value ?? null);
}
}
/** @ignore */
private delayFilter(): void {
if (this.curSearchTimeout) {
window.clearTimeout(this.curSearchTimeout);
}
this.curSearchTimeout = window.setTimeout(() => {
this.curSearchValue = this.textValue;
void this.updateItems();
}, this.refreshTriggerTimeout);
}
/** @ignore */
private async _impl_autoSelect(): Promise<boolean> {
if (!this._userInteraction) {
return isInvalidControlValue(this.value);
}
// If go empty or the loadItems resolves immediately we need to wait at tick so that the
// final target element is selected otherwise the focus restore does not work properly
// and we might endup on the body after the dialog is closed
if (this.permitValueChange) {
await new Promise(res => setTimeout(res));
}
if (this.textValue.trim() === '' && this.resetEnabled) {
await this.updateUserValue(null);
return !isInvalidControlValue(this.value);
}
const result = (await this.loadItems(this.textValue)).result;
const exactResult = result
.filter(item => !this.disabledItems.has(item.key))
.filter(
item => this.textValue.toLowerCase() === item.label.toLowerCase(),
);
if (exactResult.length === 1) {
await this.updateUserValue(exactResult[0].value);
return !isInvalidControlValue(this.value);
} else {
await this.updateUserValue({
kind: 'InvalidControlInput',
rawValue: this.textValue,
errorMessage: SELECT_ENTRY_MESSAGE,
} satisfies InvalidControlValue);
return !isInvalidControlValue(this.value);
}
}
/** @ignore */
private async updateUserValue(val: Nullable<T | InvalidControlValue>) {
if (this.permitValueChange) {
const change = await this.permitValueChange(val);
if (change) {
this.updateValue(val);
} else {
this.updateValue(this.value, true);
// Force the focus back on the control if vetoed
this.focusChild();
}
} else {
this.updateValue(val);
}
}
/** @ignore */
private readAriaLive(text: string) {
this._impl_speechMessage = text;
window.clearTimeout(this.clearMessageTimeout);
this.clearMessageTimeout = undefined;
this.clearMessageTimeout = window.setTimeout(() => {
this._impl_speechMessage = '';
}, 500);
}
/** @ignore */
private adaptItem(value: T, index = -1): IndexedItem<T, I> {
if (this.itemAdapter === undefined) {
if (isItem(value)) {
const item = value as unknown as I;
return {
index,
key: item.key,
value,
item,
label: item.label,
};
}
throw new Error('missing itemAdapter');
} else {
const item = this.itemAdapter(value);
return {
index,
key: item.key,
value,
item,
label: item.label,
};
}
}
/** @ignore */
private async loadItems(value: string) {
if (this.items === undefined) {
return { result: [], disabledItems: new Set<string>() };
}
const loaded = await this.items(value);
if (isItemLoadWithDisabled(loaded)) {
const result = loaded.result.map((val, idx) => this.adaptItem(val, idx));
return { result, disabledItems: loaded.disabledItems };
}
return {
result: loaded.map((val, idx) => this.adaptItem(val, idx)),
disabledItems: new Set<string>(),
};
}
/** @ignore */
private loadVisibleItems(
items: IndexedItem<T, I>[],
): (IndexedItem<T, I> | undefined)[] {
if (this.textValue == '' && this.resetEnabled) {
return [undefined, ...items];
} else {
return items;
}
}
/** @ignore */
private async loadItemsWithLoadingIndicator(value: string) {
const loadingTimeout = window.setTimeout(() => {
this._impl_loading = true;
this.readAriaLive('Ergebnisse werden geladen');
}, 200);
return this.loadItems(value).then(result => {
window.clearTimeout(loadingTimeout);
this._impl_loading = false;
return result;
});
}
/** @ignore */
private async updateItems(postUpdateBlock?: () => void) {
const loadId = ++this._lastLoadId;
const result = await this.loadItemsWithLoadingIndicator(this.textValue);
if (loadId === this._lastLoadId) {
this._impl_visibleItems = this.loadVisibleItems(result.result);
this.disabledItems = result.disabledItems;
this._impl_empty = this._impl_visibleItems.length == 0;
this.readAriaLive(
this._impl_visibleItems.length.toString() + ' Treffer gefunden.',
);
if (postUpdateBlock) {
postUpdateBlock();
}
}
}
/** @ignore */
private connectPopup(): void {
// waits a tick after re-querying the popup in order for it to be available
setTimeout(() => {
if (this.popup) {
this.popup.anker = this.getAnker();
this.popup.scrollTargetElement = this.labelContainer?.boxEl;
}
});
}
/** @ignore */
private onKeyDownDropdownOpen(event: KeyboardEvent): void {
const key = event.key;
switch (key) {
case 'Enter':
if (this._impl_focusItem !== null) {
this.selectAndClose(this._impl_focusItem);
} else {
void this._impl_autoSelect().then(() => {
this.cancelAndClose();
});
}
break;
case 'Escape':
this.cancelAndClose();
break;
case 'ArrowDown':
if (this._impl_focusItem === null) {
this.focusFirstItem();
} else {
this.focusNextItem();
}
event.preventDefault();
break;
case 'ArrowUp':
this.focusPrevItem();
event.preventDefault();
break;
case 'Home':
this.focusFirstItem();
break;
case 'End':
this.focusLastItem();
break;
}
}
/** @ignore */
private onKeyDownDropdownClosed(event: KeyboardEvent): void {
if (event.key == 'Enter') {
this.open();
}
if (event.key == 'ArrowDown' && isOnlyAltPressedOrNothing(event)) {
this.open(() => {
this.focusFirstItem();
});
}
}
/** @ignore */
private emitStatusChange() {
const status: FormControlStatus = {};
if (this.internalErrorMessage || this.errorMessage) {
status.error = [];
if (this.internalErrorMessage) {
status.error.push(this.internalErrorMessage);
}
if (this.errorMessage) {
status.error.push(this.errorMessage);
}
}
this.onStatusChange.emit(status);
}
/** @ignore */
private updateValue(
val: Nullable<T | InvalidControlValue>,
skipEmit?: boolean,
) {
this._cancel_selection_highlight = false;
if (isInvalidControlValue(val)) {
if (
this._valueItem === undefined &&
this.internalErrorMessage === val.errorMessage &&
this.textValue === val.rawValue
) {
skipEmit = true;
}
this._valueItem = undefined;
this.textValue = val.rawValue;
this.internalErrorMessage = SELECT_ENTRY_MESSAGE; // only one possible error message exists at the moment
} else {
const newValueItem = val ? this.adaptItem(val) : undefined;
if (this._valueItem?.value === newValueItem?.value) {
skipEmit = true;
}
this._valueItem = newValueItem;
this.textValue = this._valueItem ? this.getTitle(this._valueItem) : '';
this.internalErrorMessage = '';
}
if (!skipEmit) {
this.valueChange.emit(val);
}
this.onInputChange.emit(this.textValue);
}
}
|