49 lines
1.7 KiB
TypeScript
49 lines
1.7 KiB
TypeScript
|
import { buildWidgetGoogleFontsStylesheetHref, type TWidgetConfig } from '@cio/utils/validation/widget';
|
|||
|
|
|
|||
|
|
const ATTR_PRECONNECT = 'data-cio-widget-font-preconnect';
|
|||
|
|
|
|||
|
|
function ensurePreconnect(head: HTMLHeadElement): void {
|
|||
|
|
const doc = head.ownerDocument;
|
|||
|
|
if (!head.querySelector(`link[${ATTR_PRECONNECT}="googleapis"]`)) {
|
|||
|
|
const a = doc.createElement('link');
|
|||
|
|
a.rel = 'preconnect';
|
|||
|
|
a.href = 'https://fonts.googleapis.com';
|
|||
|
|
a.setAttribute(ATTR_PRECONNECT, 'googleapis');
|
|||
|
|
head.appendChild(a);
|
|||
|
|
}
|
|||
|
|
if (!head.querySelector(`link[${ATTR_PRECONNECT}="gstatic"]`)) {
|
|||
|
|
const b = doc.createElement('link');
|
|||
|
|
b.rel = 'preconnect';
|
|||
|
|
b.href = 'https://fonts.gstatic.com';
|
|||
|
|
b.setAttribute('crossorigin', '');
|
|||
|
|
b.setAttribute(ATTR_PRECONNECT, 'gstatic');
|
|||
|
|
head.appendChild(b);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
function stylesheetAlreadyPresent(head: HTMLHeadElement, href: string): boolean {
|
|||
|
|
for (const link of head.querySelectorAll('link[rel="stylesheet"]')) {
|
|||
|
|
if (link.getAttribute('href') === href) return true;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Idempotently loads Google Fonts for the widget into `document.head` (embed shadow trees share the
|
|||
|
|
* document’s font cache once the stylesheet is in the main document).
|
|||
|
|
*/
|
|||
|
|
export function ensureWidgetGoogleFontsLoaded(hostElement: HTMLElement, design: TWidgetConfig): void {
|
|||
|
|
const head = hostElement.ownerDocument?.head;
|
|||
|
|
if (!head) return;
|
|||
|
|
|
|||
|
|
ensurePreconnect(head);
|
|||
|
|
|
|||
|
|
const href = buildWidgetGoogleFontsStylesheetHref(design);
|
|||
|
|
if (!href || stylesheetAlreadyPresent(head, href)) return;
|
|||
|
|
|
|||
|
|
const link = hostElement.ownerDocument.createElement('link');
|
|||
|
|
link.rel = 'stylesheet';
|
|||
|
|
link.href = href;
|
|||
|
|
head.appendChild(link);
|
|||
|
|
}
|