angular/adev/shared-docs/components/icon/icon.component.ts
Joey Perrott 2d8635d29d refactor(docs-infra): migrate @angular/docs from dev-infra into adev directory (#57132)
To increase the ease of development we are moving @angular/docs into the adev directory within this repo. While
we are doing this to improve our development experience in the short term, efforts are also in place
to maintain a division between this @angular/docs (shared) code and adev itself, so that it can be extracted
back out in the future when components is ready to leverage it as well.

PR Close #57132
2024-07-30 15:51:26 +00:00

55 lines
1.4 KiB
TypeScript

/*!
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
import {DOCUMENT} from '@angular/common';
import {
ChangeDetectionStrategy,
Component,
afterNextRender,
computed,
inject,
signal,
} from '@angular/core';
@Component({
selector: 'docs-icon',
standalone: true,
templateUrl: './icon.component.html',
styleUrl: './icon.component.scss',
host: {
'[class]': 'MATERIAL_SYMBOLS_OUTLINED',
'[style.font-size.px]': 'fontSize()',
'aria-hidden': 'true',
'translate': 'no',
},
changeDetection: ChangeDetectionStrategy.OnPush,
})
export class IconComponent {
fontSize = computed(() => {
return IconComponent.isFontLoaded() ? null : 0;
});
protected readonly MATERIAL_SYMBOLS_OUTLINED = 'material-symbols-outlined';
private static isFontLoaded = signal(false);
/** Share the same promise across different instances of the component */
private static whenFontLoad?: Promise<FontFace[]> | undefined;
constructor() {
if (IconComponent.isFontLoaded()) {
return;
}
const document = inject(DOCUMENT);
afterNextRender(async () => {
IconComponent.whenFontLoad ??= document.fonts.load('normal 1px "Material Symbols Outlined"');
await IconComponent.whenFontLoad;
IconComponent.isFontLoaded.set(true);
});
}
}