Vmeda.Online/src/core/directives/fa-icon.ts

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// (C) Copyright 2015 Moodle Pty Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import { Directive, ElementRef, Input, OnChanges, SimpleChange } from '@angular/core';
import { CoreLogger } from '@singletons/logger';
import { Http } from '@singletons/core.singletons';
import { CoreConstants } from '@/core/constants';
/**
* Directive to enable font-awesome 5 as ionicons.
* Check available icons at https://fontawesome.com/icons?d=gallery&m=free
*
* Example usage:
*
* <ion-icon name="fa-icon">
*/
@Directive({
selector: 'ion-icon[name]',
})
export class CoreFaIconDirective implements OnChanges {
@Input() name = '';
protected element: HTMLElement;
protected logger: CoreLogger;
constructor(el: ElementRef) {
this.element = el.nativeElement;
this.logger = CoreLogger.getInstance('CoreFaIconDirective');
}
/**
* Detect icon name and use svg.
*/
async setIcon(): Promise<void> {
let library = 'ionic';
let iconName = this.name;
const parts = iconName.split('-', 2);
if (parts.length == 2) {
switch (parts[0]) {
case 'far':
library = 'regular';
iconName = iconName.substr(4);
break;
case 'fa':
case 'fas':
library = 'solid';
iconName = iconName.substr(parts[0].length + 1);
break;
case 'fab':
library = 'brands';
iconName = iconName.substr(4);
break;
default:
break;
}
}
if (library != 'ionic') {
const src = `assets/fonts/font-awesome/${library}/${iconName}.svg`;
this.element.setAttribute('src', src);
if (CoreConstants.BUILD.isDevelopment || CoreConstants.BUILD.isTesting) {
try {
await Http.instance.get(src, { responseType: 'text' }).toPromise();
} catch (error) {
this.logger.error(`Icon ${this.name} not found`);
}
}
} else {
this.element.removeAttribute('src');
}
return;
}
/**
* Detect changes on input properties.
*/
ngOnChanges(changes: { [name: string]: SimpleChange }): void {
if (!changes.name || !this.name) {
return;
}
this.setIcon();
}
}