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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
Component,
EventEmitter,
HostListener,
Input,
Output,
QueryList,
ViewChild,
ViewChildren,
} from '@angular/core';
import { FocusableElementOwner, Item, Key } from '../../utils/util.types';
import { itemTrack } from '../../utils/utilities';
import { WizardStepperButtonComponent } from './wizard-stepper-button/wizard-stepper-button.component';
import { WizardStepperHorizontalComponent } from './wizard-stepper-horizontal/wizard-stepper-horizontal.component';
/**
* Wizard Stepper provides a wizard-like workflow by dividing content into logical steps.
*/
@Component({
selector: 'gc-wizard-stepper',
templateUrl: './wizard-stepper.component.html',
styleUrls: ['./wizard-stepper.component.css'],
standalone: false,
})
export class WizardStepperComponent implements FocusableElementOwner {
/**
* Items to render as steps.
*/
@Input()
public items: readonly Item[] = [];
/**
* List of item keys that are marked as validated.
*/
@Input()
public validatedItemKeys: ReadonlySet<Key> = new Set();
/**
* List of item keys that are inactive.
*/
@Input()
public inactiveItemKeys: ReadonlySet<Key> = new Set();
/**
* List of item keys that are invalid.
*/
@Input()
public invalidItemKeys: ReadonlySet<Key> = new Set();
/**
* Currently selected step item.
*/
@Input()
public activeItemKey?: Key;
/**
* Decides if the steps will be shown with a label or as an icon alone.
*/
@Input()
public contentDisplay: 'icon-only' | 'text-right' = 'text-right';
/**
* Orientation of the stepper.
*/
@Input()
public orientation: 'vertical' | 'horizontal' = 'vertical';
/**
* ID of the element whose content is controlled by the selection of the stepper items, used for accessibility markup.
*/
@Input()
public controlledId = '';
/**
* User-initiated active step key switch will be only performed when the callback evaluates with value `true`. Leaving this
* empty (`undefined`) is equivalent to always resolving to `true`.
*/
@Input()
public permitActiveItemKeyChange?: (key: Key) => Promise<boolean> | boolean;
/**
* Fires upon the change of the selected step item.
*/
@Output()
public readonly activeItemKeyChange: EventEmitter<Key> =
new EventEmitter<Key>();
/**
* @ignore
*/
@ViewChildren('stepperButton')
private stepperButtons?: QueryList<WizardStepperButtonComponent>;
/**
* @ignore
*/
@ViewChild('horizontalStepper', { read: WizardStepperHorizontalComponent })
private horizontalStepperElement?: WizardStepperHorizontalComponent;
protected get _activeItem() {
return this.items.find(i => this.activeItemKey === i.key);
}
/**
* @ignore
*/
@HostListener('keydown', ['$event'])
onKeyPress(event: KeyboardEvent) {
const key = event.key;
if (this.stepperButtons) {
const currentlyFocusedButton = this.stepperButtons.find(i => i._hasFocus);
if (currentlyFocusedButton) {
const currentlyFocusedIndex = this.stepperButtons
.toArray()
.indexOf(currentlyFocusedButton);
if (key === 'ArrowDown' || key === 'ArrowRight') {
this.stepperButtons
.get(currentlyFocusedIndex + 1)
?.button.nativeElement.focus();
event.preventDefault();
}
if (key === 'ArrowUp' || key === 'ArrowLeft') {
this.stepperButtons
.get(currentlyFocusedIndex - 1)
?.button.nativeElement.focus();
event.preventDefault();
}
if (key === ' ' || key === 'Enter') {
this.stepperButtons
.get(currentlyFocusedIndex)
?.button.nativeElement.click();
event.preventDefault();
}
}
}
}
focusChild(): boolean {
if (this.orientation === 'vertical' && this.stepperButtons) {
const selectedButton = this.stepperButtons.find(btn => btn.selected);
const firstButton = this.stepperButtons.get(0);
if (selectedButton) {
selectedButton.button.nativeElement.focus();
return true;
} else if (firstButton) {
firstButton.button.nativeElement.focus();
return true;
}
} else {
if (this.horizontalStepperElement) {
this.horizontalStepperElement.button.nativeElement.focus();
return true;
}
}
return false;
}
/**
* @ignore
*/
public _getItemVariant(item: Item): 'first' | 'middle' | 'last' {
if (this.items.indexOf(item) === 0) {
return 'first';
} else if (this.items.indexOf(item) === this.items.length - 1) {
return 'last';
} else {
return 'middle';
}
}
/**
* @ignore
*/
public _isLastActiveStep(item: Item): boolean {
const activeItems = this.items.filter(
i => !this.inactiveItemKeys.has(i.key),
);
return (
activeItems.findIndex(i => i.key === item.key) === activeItems.length - 1
);
}
/** @ignore */
protected async _onButtonAction(key: Key) {
const doChange = () => {
this.activeItemKey = key;
this.activeItemKeyChange.emit(key);
};
if (
this.permitActiveItemKeyChange !== undefined &&
this.activeItemKey !== key
) {
const permit = this.permitActiveItemKeyChange(key);
if (typeof permit !== 'boolean') {
// permit is of type Promise<boolean>
const proceed = await permit;
if (proceed) {
doChange();
}
} else {
// permit is of type boolean
if (permit) {
doChange();
}
}
} else if (
this.permitActiveItemKeyChange === undefined &&
this.activeItemKey !== key
) {
doChange();
}
}
/** @ignore */
protected _itemTrackBy(item: Item): string {
return itemTrack(item);
}
}
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