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Check canvas export permission when initializing FaviconService

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Signed-off-by: marcin mikołajczak <git@mkljczk.pl>
This commit is contained in:
marcin mikołajczak 2022-10-30 09:21:16 +01:00
parent 00402f1dfb
commit a70e2f1381
1 changed files with 18 additions and 0 deletions
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18
src/utils/favicon-service.ts
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@ -1,6 +1,22 @@
// Adapted from Pleroma FE
// https://git.pleroma.social/pleroma/pleroma-fe/-/blob/ef5bbc4e5f84bb9e8da76a0440eea5d656d36977/src/services/favicon_service/favicon_service.js
const checkCanvasExtractPermission = () => {
const canvas = document.createElement('canvas');
canvas.width = 1;
canvas.height = 1;
const ctx = canvas.getContext('2d')!;
if (!ctx) return false;
ctx.fillStyle = '#0482d8';
ctx.fillRect(0, 0, 1, 1);
const { data } = ctx.getImageData(0, 0, 1, 1);
return data.join(',') === '4,130,216,255';
};
type Favicon = {
favcanvas: HTMLCanvasElement;
favimg: HTMLImageElement;
@ -17,6 +33,8 @@ const createFaviconService = () => {
/** Start the favicon service */
const initFaviconService = (): void => {
if (!checkCanvasExtractPermission()) return;
const nodes: NodeListOf<HTMLLinkElement> = document.querySelectorAll('link[rel="icon"]');
nodes.forEach(favicon => {
if (favicon) {