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ServerDrawer: patch the JSX runtime too, not just createElement

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This commit is contained in:
everestmcarthur 2026-08-01 15:43:09 -04:00
parent 7a28a6cea7
commit 61d47954fa
1 changed files with 58 additions and 30 deletions
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88
plugins/server-drawer/src/patches/createElementIntercept.ts
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@ -1,4 +1,5 @@
import { React } from "@vendetta/metro/common";
import { find } from "@vendetta/metro";
interface Intercept {
replacement: React.ComponentType<any>;
@ -12,7 +13,6 @@ interface PropsIntercept {
const intercepts = new Map<React.ComponentType<any>, Intercept>();
const propsIntercepts: PropsIntercept[] = [];
let origCreateElement: typeof React.createElement | null = null;
let isPatched = false;
export function registerIntercept(
@ -34,52 +34,80 @@ export function registerPropsIntercept(predicate: (props: any) => boolean, repla
propsIntercepts.push({ predicate, replacement });
}
/** Returns a replacement type if this element should be intercepted, `null` to render nothing, or `undefined` to pass through unchanged. */
function resolveReplacement(type: any, props: any): { type: any; props: any } | null | undefined {
if (props) {
for (const { predicate, replacement } of propsIntercepts) {
try {
if (predicate(props)) {
return replacement ? { type: replacement, props } : null;
}
} catch {
// A bad predicate shouldn't block every other element from rendering.
}
}
}
const entry = intercepts.get(type);
if (entry) {
return { type: entry.replacement, props: entry.extraProps ? { ...props, ...entry.extraProps } : props };
}
return undefined;
}
export function patchCreateElement(cleanups: (() => void)[]) {
if (isPatched) return;
// Guard against React.createElement being null in some environments
origCreateElement = React.createElement;
const origCreateElement = React.createElement;
if (!origCreateElement) {
console.warn("[ServerDrawer] React.createElement is null, skipping patch");
return;
}
const patched = function (type: any, props: any, ...rest: any[]) {
if (!origCreateElement) {
// Fallback to original createElement if somehow null (should not happen)
return React.createElement(type, props, ...rest);
}
if (props) {
for (const { predicate, replacement } of propsIntercepts) {
try {
if (predicate(props)) {
return replacement ? origCreateElement.call(React, replacement, props, ...rest) : null;
}
} catch {
// A bad predicate shouldn't block every other element from rendering.
}
}
}
const entry = intercepts.get(type);
if (entry) {
const newProps = entry.extraProps
? { ...props, ...entry.extraProps }
: props;
return origCreateElement.call(React, entry.replacement, newProps, ...rest);
}
const patchedCreateElement = function (type: any, props: any, ...rest: any[]) {
const resolved = resolveReplacement(type, props);
if (resolved === null) return null;
if (resolved) return origCreateElement.call(React, resolved.type, resolved.props, ...rest);
return origCreateElement.call(React, type, props, ...rest);
};
Object.assign(patched, origCreateElement);
React.createElement = patched as typeof React.createElement;
Object.assign(patchedCreateElement, origCreateElement);
React.createElement = patchedCreateElement as typeof React.createElement;
isPatched = true;
// Modern React/RN builds (Discord's included) compile JSX through the automatic runtime
// (jsx/jsxs from react/jsx-runtime) instead of React.createElement - patching only
// createElement misses every one of Discord's own render calls entirely, which is why
// hideGuildsBar's intercept never actually did anything even though it registered correctly.
// Found by shape (jsx/jsxs/Fragment together), not by name, for the same reason everything
// else in this file avoids name-based lookups.
const jsxRuntime = find((m: any) => typeof m?.jsx === "function" && typeof m?.jsxs === "function" && "Fragment" in m);
const restoreJsx: (() => void)[] = [];
if (jsxRuntime) {
for (const key of ["jsx", "jsxs"] as const) {
const orig = jsxRuntime[key];
if (typeof orig !== "function") continue;
jsxRuntime[key] = function (type: any, props: any, ...rest: any[]) {
const resolved = resolveReplacement(type, props);
if (resolved === null) return null;
if (resolved) return orig.call(this, resolved.type, resolved.props, ...rest);
return orig.call(this, type, props, ...rest);
};
restoreJsx.push(() => { jsxRuntime[key] = orig; });
}
} else {
console.warn("[ServerDrawer] jsx-runtime module not found, only classic createElement calls will be intercepted");
}
cleanups.push(() => {
if (isPatched && origCreateElement) {
if (isPatched) {
React.createElement = origCreateElement;
isPatched = false;
}
restoreJsx.forEach((fn) => fn());
intercepts.clear();
propsIntercepts.length = 0;
});