62 lines
2.4 KiB
TypeScript
62 lines
2.4 KiB
TypeScript
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// (C) Copyright 2015 Martin Dougiamas
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { Component, Input, AfterViewInit, ElementRef } from '@angular/core';
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import { TranslateService } from '@ngx-translate/core';
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import { CoreTextUtilsProvider } from '../../providers/utils/text';
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/**
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* Directive to add a red asterisk for required input fields.
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*
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* @description
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* For forms with required and not required fields, it is recommended to use this directive to mark the required ones.
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*
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* This directive should be applied in the label. Example:
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*
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* <ion-label core-mark-required="{{field.required}}">{{ 'mm.login.username' | translate }}</ion-label>
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*/
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@Component({
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selector: '[core-mark-required]',
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templateUrl: 'mark-required.html'
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})
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export class CoreMarkRequiredComponent implements AfterViewInit {
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@Input('core-mark-required') coreMarkRequired: boolean|string = true;
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protected element: HTMLElement;
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requiredLabel: string;
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constructor(element: ElementRef, private translate: TranslateService, private textUtils: CoreTextUtilsProvider) {
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this.element = element.nativeElement;
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this.requiredLabel = this.translate.instant('mm.core.required');
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}
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/**
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* Called after the view is initialized.
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*/
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ngAfterViewInit() : void {
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if (this.coreMarkRequired) {
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// Add the "required" to the aria-label.
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const ariaLabel = this.element.getAttribute('aria-label') || this.textUtils.cleanTags(this.element.innerHTML, true);
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if (ariaLabel) {
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this.element.setAttribute('aria-label', ariaLabel + ' ' + this.requiredLabel);
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}
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} else {
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// Remove the "required" from the aria-label.
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const ariaLabel = this.element.getAttribute('aria-label');
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if (ariaLabel) {
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this.element.setAttribute('aria-label', ariaLabel.replace(' ' + this.requiredLabel, ''));
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}
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}
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}
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}
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