Vencord/src/preload.ts

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/*
* Vencord, a modification for Discord's desktop app
* Copyright (c) 2022 Vendicated and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { debounce } from "@utils/debounce";
import IpcEvents from "@utils/IpcEvents";
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import electron, { contextBridge, ipcRenderer, webFrame } from "electron";
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import { readFileSync } from "fs";
import { join } from "path";
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import VencordNative from "./VencordNative";
if (electron.desktopCapturer === void 0) {
// Fix for desktopCapturer being main only in Electron 17+
// Discord accesses this in discord_desktop_core (DiscordNative.desktopCapture.getDesktopCaptureSources)
// and errors with cannot "read property getSources() of undefined"
// see discord_desktop_core/app/discord_native/renderer/desktopCapture.js
const electronPath = require.resolve("electron");
delete require.cache[electronPath]!.exports;
require.cache[electronPath]!.exports = {
...electron,
desktopCapturer: {
getSources: opts => ipcRenderer.invoke(IpcEvents.GET_DESKTOP_CAPTURE_SOURCES, opts)
}
};
}
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contextBridge.exposeInMainWorld("VencordNative", VencordNative);
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if (location.protocol !== "data:") {
// Discord
webFrame.executeJavaScript(readFileSync(join(__dirname, "renderer.js"), "utf-8"));
const rendererCss = join(__dirname, "renderer.css");
function insertCss(css: string) {
const style = document.createElement("style");
style.id = "vencord-css-core";
style.textContent = css;
if (document.readyState === "complete") {
document.documentElement.appendChild(style);
} else {
document.addEventListener("DOMContentLoaded", () => document.documentElement.appendChild(style), {
once: true
});
}
}
try {
const css = readFileSync(rendererCss, "utf-8");
insertCss(css);
} catch (err) {
if ((err as NodeJS.ErrnoException)?.code !== "ENOENT")
throw err;
// hack: the pre update updater does not download this file, so manually download it
// TODO: remove this in a future version
ipcRenderer.invoke(IpcEvents.DOWNLOAD_VENCORD_CSS)
.then(insertCss);
}
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require(process.env.DISCORD_PRELOAD!);
} else {
// Monaco Popout
contextBridge.exposeInMainWorld("setCss", debounce(s => VencordNative.ipc.invoke(IpcEvents.SET_QUICK_CSS, s)));
contextBridge.exposeInMainWorld("getCurrentCss", () => VencordNative.ipc.invoke(IpcEvents.GET_QUICK_CSS));
// shrug
contextBridge.exposeInMainWorld("getTheme", () => "vs-dark");
}