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import { Directive, OnDestroy } from '@angular/core';
import { ElementFormGroupDirective } from 'player/src/app/directives/element-form-group.directive';
import { InputElement, UIElement } from 'common/models/elements/element';
import { ElementComponent } from 'common/directives/element-component.directive';
import { FormElementComponent } from 'common/directives/form-element-component.directive';
import { Subscription } from 'rxjs';
import { DeviceService } from 'player/src/app/services/device.service';
import { KeypadService } from 'player/src/app/services/keypad.service';
import { KeyboardService } from 'player/src/app/services/keyboard.service';
import { TextInputComponentType } from 'player/src/app/models/text-input-component.type';
@Directive()
export abstract class TextInputGroupDirective extends ElementFormGroupDirective implements OnDestroy {
isKeypadOpen: boolean = false;
inputElement!: HTMLTextAreaElement | HTMLInputElement;
enterKeySubscription!: Subscription;
deleteCharactersSubscription!: Subscription;
selectSubscription!: Subscription;
abstract deviceService: DeviceService;
abstract keypadService: KeypadService;
abstract keyboardService: KeyboardService;
private shallOpenKeypad(elementModel: InputElement): boolean {
return !!elementModel.inputAssistancePreset &&
!(elementModel.showSoftwareKeyboard &&
elementModel.addInputAssistanceToKeyboard &&
this.deviceService.isMobileWithoutHardwareKeyboard);
}
toggleKeyInput(focusedTextInput: { inputElement: HTMLElement; focused: boolean },
elementComponent: TextInputComponentType): void {
if (this.shallOpenKeypad(elementComponent.elementModel)) {
this.keypadService.toggle(focusedTextInput, elementComponent);
this.setInputElement(focusedTextInput.inputElement);
this.isKeypadOpen = this.keypadService.isOpen;
if (this.isKeypadOpen) {
this.subscribeForInputEvents(elementComponent.elementModel, elementComponent);
} else {
this.unsubscribeFromInputEvents();
}
}
if (elementComponent.elementModel.showSoftwareKeyboard && !elementComponent.elementModel.readOnly) {
this.keyboardService
.toggle(focusedTextInput, elementComponent, this.deviceService.isMobileWithoutHardwareKeyboard);
if (this.keyboardService.isOpen) {
this.subscribeForInputEvents(elementComponent.elementModel, elementComponent);
} else {
this.unsubscribeFromInputEvents();
}
}
}
// eslint-disable-next-line class-methods-use-this
checkInputLimitation(event: {
keyboardEvent: KeyboardEvent;
inputElement: HTMLInputElement | HTMLTextAreaElement
}, elementModel: UIElement): void {
if (elementModel.maxLength &&
elementModel.isLimitedToMaxLength &&
event.inputElement.value.length === elementModel.maxLength &&
!['Backspace', 'Delete', 'ArrowLeft', 'ArrowRight', 'ArrowDown', 'ArrowUp'].includes(event.keyboardEvent.key)) {
event.keyboardEvent.preventDefault();
}
}
detectHardwareKeyboard(elementModel: UIElement): void {
if (elementModel.showSoftwareKeyboard) {
this.deviceService.hasHardwareKeyboard = true;
this.keyboardService.close();
}
}
private subscribeForInputEvents(elementModel: UIElement, elementComponent: ElementComponent): void {
this.enterKeySubscription = this.keypadService.enterKey
.subscribe(key => this.enterKey(key, elementModel, elementComponent));
this.deleteCharactersSubscription = this.keypadService.deleteCharacters
.subscribe(isBackspace => this.deleteCharacters(isBackspace, elementComponent));
this.selectSubscription = this.keypadService.select
.subscribe(key => this.select(key));
}
private unsubscribeFromInputEvents(): void {
if (this.selectSubscription) this.selectSubscription.unsubscribe();
if (this.enterKeySubscription) this.enterKeySubscription.unsubscribe();
if (this.deleteCharactersSubscription) this.deleteCharactersSubscription.unsubscribe();
}
private setInputElement(inputElement: HTMLElement): void {
this.inputElement = this.elementModel.type === 'text-area' ?
inputElement as HTMLTextAreaElement :
inputElement as HTMLInputElement;
}
private select(direction: string): void {
let lastBreak = 0;
const inputValueKeys = this.inputElement.value.split('');
const lineBreaks = inputValueKeys
.reduce(
(previousValue: number[][],
currentValue,
currentIndex) => {
if (currentValue === '\n') {
const d = [lastBreak, currentIndex + 1];
lastBreak = currentIndex + 1;
return [...previousValue, d];
}
if (currentIndex === inputValueKeys.length - 1) {
return [...previousValue, [lastBreak, currentIndex + 2]];
}
return previousValue;
}, []);
const selectionStart = this.inputElement.selectionStart || 0;
const selectionEnd = this.inputElement.selectionEnd || 0;
let newSelection = selectionStart;
switch (direction) {
case 'ArrowLeft': {
newSelection -= 1;
break;
}
case 'ArrowRight': {
newSelection += 1;
break;
}
case 'ArrowUp': {
const targetLine = lineBreaks.reverse().find(line => line[1] <= selectionStart);
if (targetLine) {
const posInLine = selectionStart - targetLine[1];
newSelection = targetLine[0] + posInLine < targetLine[1] ? targetLine[0] + posInLine : targetLine[1] - 1;
} else {
newSelection = 0;
}
break;
}
case 'ArrowDown': {
const targetLine = lineBreaks.find(line => line[0] > selectionEnd);
if (targetLine) {
const currentLine = lineBreaks.find(line => line[1] === targetLine[0]) || [0, 1];
const posInLine = selectionEnd - currentLine[0];
newSelection = targetLine[0] + posInLine < targetLine[1] ? targetLine[0] + posInLine : targetLine[1] - 1;
} else {
newSelection = inputValueKeys.length;
}
break;
}
default: {
newSelection = selectionStart;
}
}
this.inputElement.setSelectionRange(newSelection, newSelection);
}
private enterKey(key: string, elementModel: UIElement, elementComponent: ElementComponent): void {
if (!(elementModel.maxLength &&
elementModel.isLimitedToMaxLength &&
this.inputElement.value.length === this.elementModel.maxLength)) {
const selectionStart = this.inputElement.selectionStart || 0;
const selectionEnd = this.inputElement.selectionEnd || 0;
const newSelection = selectionStart ? selectionStart + 1 : 1;
this.insert({
selectionStart, selectionEnd, newSelection, key
}, elementComponent);
}
}
private deleteCharacters(backspace: boolean, elementComponent: ElementComponent): void {
let selectionStart = this.inputElement.selectionStart || 0;
let selectionEnd = this.inputElement.selectionEnd || 0;
if (backspace && selectionEnd > 0) {
if (selectionStart === selectionEnd) {
selectionStart -= 1;
}
this.insert({
selectionStart, selectionEnd, newSelection: selectionStart, key: ''
}, elementComponent);
}
if (!backspace && selectionEnd <= this.inputElement.value.length) {
if (selectionStart === selectionEnd) {
selectionEnd += 1;
}
this.insert({
selectionStart, selectionEnd, newSelection: selectionStart, key: ''
}, elementComponent);
}
}
private insert(keyAtPosition: {
selectionStart: number;
selectionEnd: number;
newSelection: number;
key: string
}, elementComponent: ElementComponent): void {
const startText = this.inputElement.value.substring(0, keyAtPosition.selectionStart);
const endText = this.inputElement.value.substring(keyAtPosition.selectionEnd);
(elementComponent as FormElementComponent).elementFormControl
.setValue(startText + keyAtPosition.key + endText);
this.inputElement.setSelectionRange(keyAtPosition.newSelection, keyAtPosition.newSelection);
}
ngOnDestroy(): void {
this.unsubscribeFromInputEvents();
super.ngOnDestroy();
}
}