electron/default_app/preload.ts

58 lines
1.7 KiB
TypeScript

import { ipcRenderer, contextBridge } from 'electron/renderer';
const policy = window.trustedTypes.createPolicy('electron-default-app', {
// we trust the SVG contents
createHTML: input => input
});
async function getOcticonSvg (name: string) {
try {
const response = await fetch(`octicon/${name}.svg`);
const div = document.createElement('div');
div.innerHTML = policy.createHTML(await response.text());
return div;
} catch {
return null;
}
}
async function loadSVG (element: HTMLSpanElement) {
for (const cssClass of element.classList) {
if (cssClass.startsWith('octicon-')) {
const icon = await getOcticonSvg(cssClass.substr(8));
if (icon) {
for (const elemClass of element.classList) {
icon.classList.add(elemClass);
}
element.before(icon);
element.remove();
break;
}
}
}
}
async function initialize () {
const electronPath = await ipcRenderer.invoke('bootstrap');
function replaceText (selector: string, text: string) {
const element = document.querySelector<HTMLElement>(selector);
if (element) {
element.innerText = text;
}
}
replaceText('.electron-version', `Electron v${process.versions.electron}`);
replaceText('.chrome-version', `Chromium v${process.versions.chrome}`);
replaceText('.node-version', `Node v${process.versions.node}`);
replaceText('.v8-version', `v8 v${process.versions.v8}`);
replaceText('.command-example', `${electronPath} path-to-app`);
for (const element of document.querySelectorAll<HTMLSpanElement>('.octicon')) {
loadSVG(element);
}
}
contextBridge.exposeInMainWorld('electronDefaultApp', {
initialize
});