merge: dev

this now uses the lazy-loaded colorpicker, but this only works if said
colorpicker has already been loaded. need to force load before anything.

browser/VencordNativeStub.ts

@@ -25,7 +25,7 @@ import * as DataStore from "../src/api/DataStore";
 import { debounce } from "../src/utils";
 import { EXTENSION_BASE_URL } from "../src/utils/web-metadata";
 import { getTheme, Theme } from "../src/utils/discord";
-import { getThemeInfo } from "../src/main/themes";
+import { getThemeInfo } from "../src/utils/themes/bd";
 
 // Discord deletes this so need to store in variable
 const { localStorage } = window;

package.json

@@ -39,15 +39,19 @@
         "gifenc": "github:mattdesl/gifenc#64842fca317b112a8590f8fef2bf3825da8f6fe3",
         "monaco-editor": "^0.43.0",
         "nanoid": "^4.0.2",
+        "usercss-meta": "^0.12.0",
         "virtual-merge": "^1.0.1"
     },
     "devDependencies": {
         "@types/chrome": "^0.0.246",
         "@types/diff": "^5.0.3",
+        "@types/less": "^3.0.4",
         "@types/lodash": "^4.14.194",
         "@types/node": "^18.16.3",
         "@types/react": "^18.2.0",
         "@types/react-dom": "^18.2.1",
+        "@types/stylus": "^0.48.39",
+        "@types/tinycolor2": "^1.4.3",
         "@types/yazl": "^2.4.2",
         "@typescript-eslint/eslint-plugin": "^5.59.1",
         "@typescript-eslint/parser": "^5.59.1",
@@ -75,7 +79,8 @@
     "pnpm": {
         "patchedDependencies": {
             "eslint-plugin-path-alias@1.0.0": "patches/eslint-plugin-path-alias@1.0.0.patch",
-            "eslint@8.46.0": "patches/eslint@8.46.0.patch"
+            "eslint@8.46.0": "patches/eslint@8.46.0.patch",
+            "@types/less@3.0.4": "patches/@types__less@3.0.4.patch"
         },
         "peerDependencyRules": {
             "ignoreMissing": [

patches/@types__less@3.0.4.patch

@@ -0,0 +1,13 @@
+diff --git a/index.d.ts b/index.d.ts
+index eb4f07d47b932fb9cc8c8cd451ab107f648bd013..18a3e15a1997734e1773718e5be55d252ed9478c 100644
+--- a/index.d.ts
++++ b/index.d.ts
+@@ -306,7 +306,5 @@ interface LessStatic {
+ }
+ 
+ declare module "less" {
+-    export = less;
++    export = LessStatic;
+ }
+-
+-declare var less: LessStatic;

pnpm-lock.yaml

@@ -1,6 +1,9 @@
 lockfileVersion: '6.0'
 
 patchedDependencies:
+  '@types/less@3.0.4':
+    hash: krcufrsfhsuxuoj7hocqugs6zi
+    path: patches/@types__less@3.0.4.patch
   eslint-plugin-path-alias@1.0.0:
     hash: m6sma4g6bh67km3q6igf6uxaja
     path: patches/eslint-plugin-path-alias@1.0.0.patch
@@ -33,6 +36,9 @@ dependencies:
   nanoid:
     specifier: ^4.0.2
     version: 4.0.2
+  usercss-meta:
+    specifier: ^0.12.0
+    version: 0.12.0
   virtual-merge:
     specifier: ^1.0.1
     version: 1.0.1
@@ -44,6 +50,9 @@ devDependencies:
   '@types/diff':
     specifier: ^5.0.3
     version: 5.0.3
+  '@types/less':
+    specifier: ^3.0.4
+    version: 3.0.4(patch_hash=krcufrsfhsuxuoj7hocqugs6zi)
   '@types/lodash':
     specifier: ^4.14.194
     version: 4.14.194
@@ -56,6 +65,12 @@ devDependencies:
   '@types/react-dom':
     specifier: ^18.2.1
     version: 18.2.1
+  '@types/stylus':
+    specifier: ^0.48.39
+    version: 0.48.39
+  '@types/tinycolor2':
+    specifier: ^1.4.3
+    version: 1.4.3
   '@types/yazl':
     specifier: ^2.4.2
     version: 2.4.2
@@ -564,6 +579,11 @@ packages:
     resolution: {integrity: sha512-wOuvG1SN4Us4rez+tylwwwCV1psiNVOkJeM3AUWUNWg/jDQY2+HE/444y5gc+jBmRqASOm2Oeh5c1axHobwRKQ==}
     dev: true
 
+  /@types/less@3.0.4(patch_hash=krcufrsfhsuxuoj7hocqugs6zi):
+    resolution: {integrity: sha512-djlMpTdDF+tLaqVpK/0DWGNIr7BFjN8ykDLkgS0sQGYYLop51imRRE3foTjl+dMAH1zFE8bMZAG0VbYPEcSgsA==}
+    dev: true
+    patched: true
+
   /@types/lodash@4.14.194:
     resolution: {integrity: sha512-r22s9tAS7imvBt2lyHC9B8AGwWnXaYb1tY09oyLkXDs4vArpYJzw09nj8MLx5VfciBPGIb+ZwG0ssYnEPJxn/g==}
     dev: true
@@ -613,6 +633,16 @@ packages:
     resolution: {integrity: sha512-21cFJr9z3g5dW8B0CVI9g2O9beqaThGQ6ZFBqHfwhzLDKUxaqTIy3vnfah/UPkfOiF2pLq+tGz+W8RyCskuslw==}
     dev: true
 
+  /@types/stylus@0.48.39:
+    resolution: {integrity: sha512-98a0QrJorrq8+Vsan9yfxol2Qr6nvUWBeV3oYnSMks4QdLMebAzZvRd9IuoZOcnB6Erfjcjn1J2J+63MPCxJnw==}
+    dependencies:
+      '@types/node': 18.16.3
+    dev: true
+
+  /@types/tinycolor2@1.4.3:
+    resolution: {integrity: sha512-Kf1w9NE5HEgGxCRyIcRXR/ZYtDv0V8FVPtYHwLxl0O+maGX0erE77pQlD0gpP+/KByMZ87mOA79SjifhSB3PjQ==}
+    dev: true
+
   /@types/yauzl@2.10.0:
     resolution: {integrity: sha512-Cn6WYCm0tXv8p6k+A8PvbDG763EDpBoTzHdA+Q/MF6H3sapGjCm9NzoaJncJS9tUKSuCoDs9XHxYYsQDgxR6kw==}
     requiresBuild: true
@@ -3309,6 +3339,11 @@ packages:
     engines: {node: '>=0.10.0'}
     dev: true
 
+  /usercss-meta@0.12.0:
+    resolution: {integrity: sha512-zKrXCKdpeIwtVe87omxGo9URf+7mbozduMZEg79dmT4KB3XJwfIkEi/Uk0PcTwR/nZLtAK1+k7isgbGB/g6E7Q==}
+    engines: {node: '>=8.3'}
+    dev: false
+
   /util-deprecate@1.0.2:
     resolution: {integrity: sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==}
     dev: true

src/VencordNative.ts

@@ -8,7 +8,6 @@ import { IpcEvents } from "@utils/IpcEvents";
 import { IpcRes } from "@utils/types";
 import { ipcRenderer } from "electron";
 import { PluginIpcMappings } from "main/ipcPlugins";
-import type { UserThemeHeader } from "main/themes";
 
 function invoke<T = any>(event: IpcEvents, ...args: any[]) {
     return ipcRenderer.invoke(event, ...args) as Promise<T>;
@@ -33,7 +32,7 @@ export default {
         uploadTheme: (fileName: string, fileData: string) => invoke<void>(IpcEvents.UPLOAD_THEME, fileName, fileData),
         deleteTheme: (fileName: string) => invoke<void>(IpcEvents.DELETE_THEME, fileName),
         getThemesDir: () => invoke<string>(IpcEvents.GET_THEMES_DIR),
-        getThemesList: () => invoke<Array<UserThemeHeader>>(IpcEvents.GET_THEMES_LIST),
+        getThemesList: () => invoke<Array<{ fileName: string; content: string; }>>(IpcEvents.GET_THEMES_LIST),
         getThemeData: (fileName: string) => invoke<string | undefined>(IpcEvents.GET_THEME_DATA, fileName),
         getSystemValues: () => invoke<Record<string, string>>(IpcEvents.GET_THEME_SYSTEM_VALUES),
     },

src/api/Settings.ts

@@ -75,6 +75,12 @@ export interface Settings {
         settingsSync: boolean;
         settingsSyncVersion: number;
     };
+
+    userCssVars: {
+        [fileName: string]: {
+            [varName: string]: string;
+        };
+    };
 }
 
 const DefaultSettings: Settings = {
@@ -107,7 +113,9 @@ const DefaultSettings: Settings = {
         url: "https://api.vencord.dev/",
         settingsSync: false,
         settingsSyncVersion: 0
-    }
+    },
+
+    userCssVars: {}
 };
 
 try {
@@ -125,7 +133,7 @@ const saveSettingsOnFrequentAction = debounce(async () => {
     }
 }, 60_000);
 
-type SubscriptionCallback = ((newValue: any, path: string) => void) & { _paths?: Array<string>; };
+type SubscriptionCallback = ((newValue: any, path: string) => void) & { _paths?: Array<string>; _exact?: boolean; };
 const subscriptions = new Set<SubscriptionCallback>();
 
 const proxyCache = {} as Record<string, any>;
@@ -182,7 +190,12 @@ function makeProxy(settings: any, root = settings, path = ""): Settings {
             const setPath = `${path}${path && "."}${p}`;
             delete proxyCache[setPath];
             for (const subscription of subscriptions) {
-                if (!subscription._paths || subscription._paths.includes(setPath)) {
+                if (
+                    !subscription._paths ||
+                    (subscription._exact
+                        ? subscription._paths.includes(setPath)
+                        : subscription._paths.some(p => setPath.startsWith(p)))
+                ) {
                     subscription(v, setPath);
                 }
             }
@@ -220,11 +233,14 @@ export const Settings = makeProxy(settings);
  * @returns Settings
  */
 // TODO: Representing paths as essentially "string[].join('.')" wont allow dots in paths, change to "paths?: string[][]" later
-export function useSettings(paths?: UseSettings<Settings>[]) {
+export function useSettings(paths?: UseSettings<Settings>[], exact = true) {
     const [, forceUpdate] = React.useReducer(() => ({}), {});
 
     const onUpdate: SubscriptionCallback = paths
-        ? (value, path) => paths.includes(path as UseSettings<Settings>) && forceUpdate()
+        ? (value, path) =>
+            (exact
+                ? paths.includes(path as UseSettings<Settings>)
+                : paths.some(p => path.startsWith(p))) && forceUpdate()
         : forceUpdate;
 
     React.useEffect(() => {
@@ -250,11 +266,12 @@ type ResolvePropDeep<T, P> = P extends "" ? T :
  * @example addSettingsListener("", (newValue, path) => console.log(`${path} is now ${newValue}`))
  *          addSettingsListener("plugins.Unindent.enabled", v => console.log("Unindent is now", v ? "enabled" : "disabled"))
  */
-export function addSettingsListener<Path extends keyof Settings>(path: Path, onUpdate: (newValue: Settings[Path], path: Path) => void): void;
-export function addSettingsListener<Path extends string>(path: Path, onUpdate: (newValue: Path extends "" ? any : ResolvePropDeep<Settings, Path>, path: Path extends "" ? string : Path) => void): void;
-export function addSettingsListener(path: string, onUpdate: (newValue: any, path: string) => void) {
+export function addSettingsListener<Path extends keyof Settings>(path: Path, onUpdate: (newValue: Settings[Path], path: Path) => void, exact?: boolean): void;
+export function addSettingsListener<Path extends string>(path: Path, onUpdate: (newValue: Path extends "" ? any : ResolvePropDeep<Settings, Path>, path: Path extends "" ? string : Path) => void, exact?: boolean): void;
+export function addSettingsListener(path: string, onUpdate: (newValue: any, path: string) => void, exact = true) {
     if (path)
         ((onUpdate as SubscriptionCallback)._paths ??= []).push(path);
+    (onUpdate as SubscriptionCallback)._exact = exact;
     subscriptions.add(onUpdate);
 }
 

src/components/Icons.tsx

@@ -256,6 +256,24 @@ export function DeleteIcon(props: IconProps) {
     );
 }
 
+/**
+ * A plugin icon, created by CorellanStoma. https://github.com/CreArts-Community/Settings-Icons
+ */
+export function PluginIcon(props: IconProps) {
+    return (
+        <Icon
+            {...props}
+            className={classes(props.className, "vc-plugin-icon")}
+            viewBox="0 0 24 24"
+        >
+            <path
+                fill="currentColor"
+                d="M20.5 11H19V7c0-1.1-.9-2-2-2h-4V3.5C13 2.12 11.88 1 10.5 1S8 2.12 8 3.5V5H4c-1.1 0-1.99.9-1.99 2v3.8H3.5c1.49 0 2.7 1.21 2.7 2.7s-1.21 2.7-2.7 2.7H2V20c0 1.1.9 2 2 2h3.8v-1.5c0-1.49 1.21-2.7 2.7-2.7s2.7 1.21 2.7 2.7V22H17c1.1 0 2-.9 2-2v-4h1.5c1.38 0 2.5-1.12 2.5-2.5S21.88 11 20.5 11z"
+            />
+        </Icon>
+    );
+}
+
 export function PlusIcon(props: IconProps) {
     return (
         <Icon

src/components/ThemeSettings/ThemesTab.tsx

@@ -16,23 +16,31 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { useSettings } from "@api/Settings";
+import "./themesStyles.css";
+
+import { Settings, useSettings } from "@api/Settings";
 import { classNameFactory } from "@api/Styles";
 import { Flex } from "@components/Flex";
-import { DeleteIcon } from "@components/Icons";
+import { CogWheel, DeleteIcon, PluginIcon } from "@components/Icons";
 import { Link } from "@components/Link";
+import { AddonCard } from "@components/VencordSettings/AddonCard";
+import { SettingsTab, wrapTab } from "@components/VencordSettings/shared";
 import { openInviteModal } from "@utils/discord";
 import { Margins } from "@utils/margins";
 import { classes } from "@utils/misc";
+import { openModal } from "@utils/modal";
 import { showItemInFolder } from "@utils/native";
 import { useAwaiter } from "@utils/react";
+import type { ThemeHeader } from "@utils/themes";
+import { getThemeInfo, stripBOM, type UserThemeHeader } from "@utils/themes/bd";
+import { usercssParse } from "@utils/themes/usercss";
 import { findByPropsLazy, findLazy } from "@webpack";
-import { Button, Card, Forms, React, showToast, TabBar, TextArea, useEffect, useRef, useState } from "@webpack/common";
-import { UserThemeHeader } from "main/themes";
+import { Button, Card, Forms, React, showToast, TabBar, TextArea, Tooltip, useEffect, useMemo, useRef, useState } from "@webpack/common";
 import type { ComponentType, Ref, SyntheticEvent } from "react";
+import type { UserstyleHeader } from "usercss-meta";
 
-import { AddonCard } from "./AddonCard";
-import { SettingsTab, wrapTab } from "./shared";
+import { isPluginEnabled } from "../../plugins";
+import { UserCSSSettingsModal } from "./UserCSSModal";
 
 type FileInput = ComponentType<{
     ref: Ref<HTMLInputElement>;
@@ -47,6 +55,7 @@ const TextAreaProps = findLazy(m => typeof m.textarea === "string");
 
 const cl = classNameFactory("vc-settings-theme-");
 
+
 function Validator({ link }: { link: string; }) {
     const [res, err, pending] = useAwaiter(() => fetch(link).then(res => {
         if (res.status > 300) throw `${res.status} ${res.statusText}`;
@@ -95,14 +104,73 @@ function Validators({ themeLinks }: { themeLinks: string[]; }) {
     );
 }
 
-interface ThemeCardProps {
+interface OtherThemeCardProps {
     theme: UserThemeHeader;
     enabled: boolean;
     onChange: (enabled: boolean) => void;
     onDelete: () => void;
 }
 
-function ThemeCard({ theme, enabled, onChange, onDelete }: ThemeCardProps) {
+interface UserCSSCardProps {
+    theme: UserstyleHeader;
+    enabled: boolean;
+    onChange: (enabled: boolean) => void;
+    onDelete: () => void;
+}
+
+function UserCSSThemeCard({ theme, enabled, onChange, onDelete }: UserCSSCardProps) {
+    const missingPlugins = useMemo(() =>
+        theme.requiredPlugins?.filter(p => !isPluginEnabled(p)), [theme]);
+
+    return (
+        <AddonCard
+            name={theme.name ?? "Unknown"}
+            description={theme.description}
+            author={theme.author ?? "Unknown"}
+            enabled={enabled}
+            setEnabled={onChange}
+            infoButton={
+                <>
+                    {missingPlugins && missingPlugins.length > 0 && (
+                        <Tooltip text={"The following plugins are required, but aren't enabled: " + missingPlugins.join(", ")}>
+                            {({ onMouseLeave, onMouseEnter }) => (
+                                <div
+                                    style={{ color: "var(--status-warning" }}
+                                    onMouseEnter={onMouseEnter}
+                                    onMouseLeave={onMouseLeave}
+                                >
+                                    <PluginIcon />
+                                </div>
+                            )}
+                        </Tooltip>
+                    )}
+                    {theme.vars && (
+                        <div style={{ cursor: "pointer" }} onClick={
+                            () => openModal(modalProps =>
+                                <UserCSSSettingsModal modalProps={modalProps} theme={theme} />)
+                        }>
+                            <CogWheel />
+                        </div>
+                    )}
+                    {IS_WEB && (
+                        <div style={{ cursor: "pointer", color: "var(--status-danger" }} onClick={onDelete}>
+                            <DeleteIcon />
+                        </div>
+                    )}
+                </>
+            }
+            footer={
+                <Flex flexDirection="row" style={{ gap: "0.2em" }}>
+                    {!!theme.homepageURL && <Link href={theme.homepageURL}>Homepage</Link>}
+                    {!!(theme.homepageURL && theme.supportURL) && " • "}
+                    {!!theme.supportURL && <Link href={theme.supportURL}>Support</Link>}
+                </Flex>
+            }
+        />
+    );
+}
+
+function OtherThemeCard({ theme, enabled, onChange, onDelete }: OtherThemeCardProps) {
     return (
         <AddonCard
             name={theme.name}
@@ -149,7 +217,7 @@ function ThemesTab() {
     const fileInputRef = useRef<HTMLInputElement>(null);
     const [currentTab, setCurrentTab] = useState(ThemeTab.LOCAL);
     const [themeText, setThemeText] = useState(settings.themeLinks.join("\n"));
-    const [userThemes, setUserThemes] = useState<UserThemeHeader[] | null>(null);
+    const [userThemes, setUserThemes] = useState<ThemeHeader[] | null>(null);
     const [themeDir, , themeDirPending] = useAwaiter(VencordNative.themes.getThemesDir);
 
     useEffect(() => {
@@ -158,7 +226,57 @@ function ThemesTab() {
 
     async function refreshLocalThemes() {
         const themes = await VencordNative.themes.getThemesList();
-        setUserThemes(themes);
+
+        const themeInfo: ThemeHeader[] = [];
+
+        for (const { fileName, content } of themes) {
+            if (!fileName.endsWith(".css")) continue;
+
+            if ((!IS_WEB || "armcord" in window) && fileName.endsWith(".user.css")) {
+                // handle it as usercss
+                const header = await usercssParse(content, fileName);
+
+                themeInfo.push({
+                    type: "usercss",
+                    header
+                });
+
+                Settings.userCssVars[header.id] ??= {};
+
+                for (const [name, varInfo] of Object.entries(header.vars ?? {})) {
+                    let normalizedValue = "";
+
+                    switch (varInfo.type) {
+                        case "text":
+                        case "color":
+                            normalizedValue = varInfo.default;
+                            break;
+                        case "select":
+                            normalizedValue = varInfo.options.find(v => v.name === varInfo.default)!.value;
+                            break;
+                        case "checkbox":
+                            normalizedValue = varInfo.default ? "1" : "0";
+                            break;
+                        case "range":
+                            normalizedValue = `${varInfo.default}${varInfo.units}`;
+                            break;
+                        case "number":
+                            normalizedValue = String(varInfo.default);
+                            break;
+                    }
+
+                    Settings.userCssVars[header.id][name] ??= normalizedValue;
+                }
+            } else {
+                // presumably BD but could also be plain css
+                themeInfo.push({
+                    type: "other",
+                    header: getThemeInfo(stripBOM(content), fileName)
+                });
+            }
+        }
+
+        setUserThemes(themeInfo);
     }
 
     // When a local theme is enabled/disabled, update the settings
@@ -252,19 +370,32 @@ function ThemesTab() {
                     </Card>
 
                     <div className={cl("grid")}>
-                        {userThemes?.map(theme => (
-                            <ThemeCard
-                                key={theme.fileName}
-                                enabled={settings.enabledThemes.includes(theme.fileName)}
-                                onChange={enabled => onLocalThemeChange(theme.fileName, enabled)}
-                                onDelete={async () => {
-                                    onLocalThemeChange(theme.fileName, false);
-                                    await VencordNative.themes.deleteTheme(theme.fileName);
-                                    refreshLocalThemes();
-                                }}
-                                theme={theme}
-                            />
-                        ))}
+                        {userThemes?.map(({ type, header: theme }: ThemeHeader) => (
+                            type === "other" ? (
+                                <OtherThemeCard
+                                    key={theme.fileName}
+                                    enabled={settings.enabledThemes.includes(theme.fileName)}
+                                    onChange={enabled => onLocalThemeChange(theme.fileName, enabled)}
+                                    onDelete={async () => {
+                                        onLocalThemeChange(theme.fileName, false);
+                                        await VencordNative.themes.deleteTheme(theme.fileName);
+                                        refreshLocalThemes();
+                                    }}
+                                    theme={theme as UserThemeHeader}
+                                />
+                            ) : (
+                                <UserCSSThemeCard
+                                    key={theme.fileName}
+                                    enabled={settings.enabledThemes.includes(theme.fileName)}
+                                    onChange={enabled => onLocalThemeChange(theme.fileName, enabled)}
+                                    onDelete={async () => {
+                                        onLocalThemeChange(theme.fileName, false);
+                                        await VencordNative.themes.deleteTheme(theme.fileName);
+                                        refreshLocalThemes();
+                                    }}
+                                    theme={theme as UserstyleHeader}
+                                />
+                            )))}
                     </div>
                 </Forms.FormSection>
             </>

src/components/ThemeSettings/UserCSSModal.tsx

@@ -0,0 +1,114 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { useSettings } from "@api/Settings";
+import { Flex } from "@components/Flex";
+import { ModalCloseButton, ModalContent, ModalHeader, ModalProps, ModalRoot } from "@utils/modal";
+import { Text } from "@webpack/common";
+import type { ReactNode } from "react";
+import { UserstyleHeader } from "usercss-meta";
+
+import { SettingBooleanComponent, SettingColorComponent, SettingNumberComponent, SettingRangeComponent, SettingSelectComponent, SettingTextComponent } from "./components";
+
+interface UserCSSSettingsModalProps {
+    modalProps: ModalProps;
+    theme: UserstyleHeader;
+}
+
+export function UserCSSSettingsModal({ modalProps, theme }: UserCSSSettingsModalProps) {
+    // @ts-expect-error UseSettings<> can't determine this is a valid key
+    const themeSettings = useSettings(["userCssVars"], false).userCssVars[theme.id];
+
+    const controls: ReactNode[] = [];
+
+    for (const [name, varInfo] of Object.entries(theme.vars)) {
+        switch (varInfo.type) {
+            case "text": {
+                controls.push(
+                    <SettingTextComponent
+                        label={varInfo.label}
+                        name={name}
+                        themeSettings={themeSettings}
+                    />
+                );
+                break;
+            }
+
+            case "checkbox": {
+                controls.push(
+                    <SettingBooleanComponent
+                        label={varInfo.label}
+                        name={name}
+                        themeSettings={themeSettings}
+                    />
+                );
+                break;
+            }
+
+            case "color": {
+                controls.push(
+                    <SettingColorComponent
+                        label={varInfo.label}
+                        name={name}
+                        themeSettings={themeSettings}
+                    />
+                );
+                break;
+            }
+
+            case "number": {
+                controls.push(
+                    <SettingNumberComponent
+                        label={varInfo.label}
+                        name={name}
+                        themeSettings={themeSettings}
+                    />
+                );
+                break;
+            }
+
+            case "select": {
+                controls.push(
+                    <SettingSelectComponent
+                        label={varInfo.label}
+                        name={name}
+                        options={varInfo.options}
+                        default={varInfo.default}
+                        themeSettings={themeSettings}
+                    />
+                );
+                break;
+            }
+
+            case "range": {
+                controls.push(
+                    <SettingRangeComponent
+                        label={varInfo.label}
+                        name={name}
+                        default={varInfo.default}
+                        min={varInfo.min}
+                        max={varInfo.max}
+                        step={varInfo.step}
+                        themeSettings={themeSettings}
+                    />
+                );
+                break;
+            }
+        }
+    }
+
+    return (
+        <ModalRoot {...modalProps}>
+            <ModalHeader separator={false}>
+                <Text variant="heading-lg/semibold" style={{ flexGrow: 1 }}>Settings for {theme.name}</Text>
+                <ModalCloseButton onClick={modalProps.onClose} />
+            </ModalHeader>
+            <ModalContent>
+                <Flex flexDirection="column" style={{ gap: 12, marginBottom: 16 }}>{controls}</Flex>
+            </ModalContent>
+        </ModalRoot>
+    );
+}

src/components/ThemeSettings/components/SettingBooleanComponent.tsx

@@ -0,0 +1,39 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Forms, Switch, useState } from "@webpack/common";
+
+interface Props {
+    label: string;
+    name: string;
+    themeSettings: Record<string, string>;
+}
+
+export function SettingBooleanComponent({ label, name, themeSettings }: Props) {
+    const [value, setValue] = useState(themeSettings[name]);
+
+    function handleChange(value: boolean) {
+        const corrected = value ? "1" : "0";
+
+        setValue(corrected);
+
+        themeSettings[name] = corrected;
+    }
+
+    return (
+        <Forms.FormSection>
+            <Switch
+                key={name}
+                value={value === "1"}
+                onChange={handleChange}
+                hideBorder
+                style={{ marginBottom: "0.5em" }}
+            >
+                {label}
+            </Switch>
+        </Forms.FormSection>
+    );
+}

src/components/ThemeSettings/components/SettingColorComponent.tsx

@@ -0,0 +1,56 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import "./colorStyles.css";
+
+import { classNameFactory } from "@api/Styles";
+import { findByCodeLazy, findComponentByCodeLazy } from "@webpack";
+import { Forms, useMemo, useState } from "@webpack/common";
+
+interface ColorPickerProps {
+    color: number | null;
+    showEyeDropper?: boolean;
+    onChange(value: number | null): void;
+}
+const ColorPicker = findComponentByCodeLazy<ColorPickerProps>(".Messages.USER_SETTINGS_PROFILE_COLOR_SELECT_COLOR", ".BACKGROUND_PRIMARY)");
+
+// TinyColor is completely unmangled and it's duplicated in two modules! Fun!
+const TinyColor: tinycolor.Constructor = findByCodeLazy("this._gradientType=");
+
+const cl = classNameFactory("vc-usercss-settings-color-");
+
+interface Props {
+    label: string;
+    name: string;
+    themeSettings: Record<string, string>;
+}
+
+export function SettingColorComponent({ label, name, themeSettings }: Props) {
+    const [value, setValue] = useState(themeSettings[name]);
+
+    function handleChange(value: number) {
+        const corrected = "#" + (value?.toString(16).padStart(6, "0") ?? "000000");
+
+        setValue(corrected);
+
+        themeSettings[name] = corrected;
+    }
+
+    const normalizedValue = useMemo(() => parseInt(TinyColor(value).toHex(), 16), [value]);
+
+    return (
+        <Forms.FormSection>
+            <div className={cl("swatch-row")}>
+                <span>{label}</span>
+                <ColorPicker
+                    key={name}
+                    color={normalizedValue}
+                    onChange={handleChange}
+                />
+            </div>
+        </Forms.FormSection>
+    );
+}

src/components/ThemeSettings/components/SettingNumberComponent.tsx

@@ -0,0 +1,36 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Forms, TextInput, useState } from "@webpack/common";
+
+interface Props {
+    label: string;
+    name: string;
+    themeSettings: Record<string, string>;
+}
+
+export function SettingNumberComponent({ label, name, themeSettings }: Props) {
+    const [value, setValue] = useState(themeSettings[name]);
+
+    function handleChange(value: string) {
+        setValue(value);
+
+        themeSettings[name] = value;
+    }
+
+    return (
+        <Forms.FormSection>
+            <Forms.FormTitle tag="h5">{label}</Forms.FormTitle>
+            <TextInput
+                type="number"
+                pattern="-?[0-9]+"
+                key={name}
+                value={value}
+                onChange={handleChange}
+            />
+        </Forms.FormSection>
+    );
+}

src/components/ThemeSettings/components/SettingRangeComponent.tsx

@@ -0,0 +1,56 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Forms, Slider, useMemo, useState } from "@webpack/common";
+
+interface Props {
+    label: string;
+    name: string;
+    default: number;
+    min?: number;
+    max?: number;
+    step?: number;
+    themeSettings: Record<string, string>;
+}
+
+export function SettingRangeComponent({ label, name, default: def, min, max, step, themeSettings }: Props) {
+    const [value, setValue] = useState(themeSettings[name]);
+
+    function handleChange(value: number) {
+        const corrected = value.toString();
+
+        setValue(corrected);
+
+        themeSettings[name] = corrected;
+    }
+
+    const markers = useMemo(() => {
+        const markers: number[] = [];
+
+        // defaults taken from https://github.com/openstyles/stylus/wiki/Writing-UserCSS#default-value
+        for (let i = (min ?? 0); i <= (max ?? 10); i += (step ?? 1)) {
+            markers.push(i);
+        }
+
+        return markers;
+    }, [min, max, step]);
+
+    return (
+        <Forms.FormSection>
+            <Forms.FormTitle tag="h5">{label}</Forms.FormTitle>
+            <Slider
+                initialValue={parseInt(value, 10)}
+                defaultValue={def}
+                onValueChange={handleChange}
+                minValue={min}
+                maxValue={max}
+
+                markers={markers}
+                stickToMarkers={true}
+            />
+        </Forms.FormSection>
+    );
+}

src/components/ThemeSettings/components/SettingSelectComponent.tsx

@@ -0,0 +1,55 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { identity } from "@utils/misc";
+import { ComponentTypes, Forms, Select, useMemo, useState } from "@webpack/common";
+
+interface Props {
+    label: string;
+    name: string;
+    options: {
+        name: string;
+        label: string;
+        value: string;
+    }[];
+    default: string;
+    themeSettings: Record<string, string>;
+}
+
+export function SettingSelectComponent({ label, name, options, default: def, themeSettings }: Props) {
+    const [value, setValue] = useState(themeSettings[name]);
+
+    function handleChange(value: string) {
+        setValue(value);
+
+        themeSettings[name] = value;
+    }
+
+    const opts = useMemo(() => options.map(option => ({
+        disabled: false,
+
+        key: option.name,
+        value: option.value,
+        default: def === option.name,
+        label: option.label
+    } satisfies ComponentTypes.SelectOption)), [options, def]);
+
+    return (
+        <Forms.FormSection>
+            <Forms.FormTitle tag="h5">{label}</Forms.FormTitle>
+            <Select
+                placeholder={label}
+                key={name}
+                options={opts}
+                closeOnSelect={true}
+
+                select={handleChange}
+                isSelected={v => v === value}
+                serialize={identity}
+            />
+        </Forms.FormSection>
+    );
+}

src/components/ThemeSettings/components/SettingTextComponent.tsx

@@ -0,0 +1,34 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Forms, TextInput, useState } from "@webpack/common";
+
+interface Props {
+    label: string;
+    name: string;
+    themeSettings: Record<string, string>;
+}
+
+export function SettingTextComponent({ label, name, themeSettings }: Props) {
+    const [value, setValue] = useState(themeSettings[name]);
+
+    function handleChange(value: string) {
+        setValue(value);
+
+        themeSettings[name] = value;
+    }
+
+    return (
+        <Forms.FormSection>
+            <Forms.FormTitle tag="h5">{label}</Forms.FormTitle>
+            <TextInput
+                key={name}
+                value={value}
+                onChange={handleChange}
+            />
+        </Forms.FormSection>
+    );
+}

src/components/ThemeSettings/components/colorStyles.css

@@ -0,0 +1,19 @@
+.vc-usercss-settings-color-swatch-row {
+    display: flex;
+    flex-direction: row;
+    width: 100%;
+    align-items: center;
+}
+
+.vc-usercss-settings-color-swatch-row > span {
+    display: block;
+    flex: 1;
+    overflow: hidden;
+    margin-top: 0;
+    margin-bottom: 0;
+    color: var(--header-primary);
+    line-height: 24px;
+    font-size: 16px;
+    font-weight: 500;
+    word-wrap: break-word;
+}

src/components/ThemeSettings/components/index.ts

@@ -0,0 +1,12 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+export * from "./SettingBooleanComponent";
+export * from "./SettingColorComponent";
+export * from "./SettingNumberComponent";
+export * from "./SettingRangeComponent";
+export * from "./SettingSelectComponent";
+export * from "./SettingTextComponent";

src/components/VencordSettings/shared.tsx

@@ -17,7 +17,6 @@
 */
 
 import "./settingsStyles.css";
-import "./themesStyles.css";
 
 import ErrorBoundary from "@components/ErrorBoundary";
 import { handleComponentFailed } from "@components/handleComponentFailed";

src/main/ipcMain.ts

@@ -29,7 +29,6 @@ import { join, normalize } from "path";
 
 import monacoHtml from "~fileContent/monacoWin.html;base64";
 
-import { getThemeInfo, stripBOM, UserThemeHeader } from "./themes";
 import { ALLOWED_PROTOCOLS, QUICKCSS_PATH, SETTINGS_DIR, SETTINGS_FILE, THEMES_DIR } from "./utils/constants";
 import { makeLinksOpenExternally } from "./utils/externalLinks";
 
@@ -47,21 +46,11 @@ function readCss() {
     return readFile(QUICKCSS_PATH, "utf-8").catch(() => "");
 }
 
-async function listThemes(): Promise<UserThemeHeader[]> {
-    const files = await readdir(THEMES_DIR).catch(() => []);
-
-    const themeInfo: UserThemeHeader[] = [];
-
-    for (const fileName of files) {
-        if (!fileName.endsWith(".css")) continue;
-
-        const data = await getThemeData(fileName).then(stripBOM).catch(() => null);
-        if (data == null) continue;
-
-        themeInfo.push(getThemeInfo(data, fileName));
-    }
-
-    return themeInfo;
+function listThemes(): Promise<{ fileName: string; content: string; }[]> {
+    return readdir(THEMES_DIR)
+        .then(files =>
+            Promise.all(files.map(async fileName => ({ fileName, content: await getThemeData(fileName) }))))
+        .catch(() => []);
 }
 
 function getThemeData(fileName: string) {

src/plugins/_core/settings.tsx

@@ -101,7 +101,7 @@ export default definePlugin({
             {
                 section: "VencordThemes",
                 label: "Themes",
-                element: require("@components/VencordSettings/ThemesTab").default,
+                element: require("@components/ThemeSettings/ThemesTab").default,
                 className: "vc-themes"
             },
             !IS_UPDATER_DISABLED && {

src/utils/dependencies.ts

@@ -16,6 +16,9 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
+import type StylusRenderer = require("stylus/lib/renderer");
+import type LessStatic from "less";
+
 import { makeLazy } from "./lazy";
 import { EXTENSION_BASE_URL } from "./web-metadata";
 
@@ -84,3 +87,18 @@ export const shikiOnigasmSrc = "https://unpkg.com/@vap/shiki@0.10.3/dist/onig.wa
 
 // @ts-expect-error
 export const getStegCloak = /* #__PURE__*/ makeLazy(() => import("https://unpkg.com/stegcloak-dist@1.0.0/index.js"));
+
+export const getStylus = /* #__PURE__*/ makeLazy(async () => {
+    const stylusScript = await fetch("https://unpkg.com/stylus-lang-bundle@0.58.1/dist/stylus-renderer.min.js").then(r => r.text());
+    // the stylus bundle doesn't have a header that checks for export conditions so we can just patch the script to
+    // return the renderer itself
+    const patchedScript = stylusScript.replace("var StylusRenderer=", "return ");
+    return Function(patchedScript)() as typeof StylusRenderer;
+});
+
+export const getLess = /* #__PURE__*/ makeLazy(async () => {
+    const lessScript = await fetch("https://unpkg.com/less@4.2.0/dist/less.min.js").then(r => r.text());
+    const module = { exports: {} };
+    Function("module", "exports", lessScript)(module, module.exports);
+    return module.exports as LessStatic;
+});

src/utils/quickCss.ts

@@ -17,6 +17,9 @@
 */
 
 import { addSettingsListener, Settings } from "@api/Settings";
+import { Toasts } from "@webpack/common";
+
+import { compileUsercss } from "./themes/usercss/compiler";
 
 
 let style: HTMLStyleElement;
@@ -65,12 +68,36 @@ async function initThemes() {
         for (const theme of enabledThemes) {
             const themeData = await VencordNative.themes.getThemeData(theme);
             if (!themeData) continue;
+
             const blob = new Blob([themeData], { type: "text/css" });
             links.push(URL.createObjectURL(blob));
         }
     } else {
-        const localThemes = enabledThemes.map(theme => `vencord:///themes/${theme}?v=${Date.now()}`);
-        links.push(...localThemes);
+        for (const theme of enabledThemes) if (!theme.endsWith(".user.css")) {
+            links.push(`vencord:///themes/${theme}?v=${Date.now()}`);
+        }
+    }
+
+    if (!IS_WEB || "armcord" in window) {
+        for (const theme of enabledThemes) if (theme.endsWith(".user.css")) {
+            // UserCSS goes through a compile step first
+            const css = await compileUsercss(theme);
+            if (!css) {
+                // let's not leave the user in the dark about this and point them to where they can find the error
+                Toasts.show({
+                    message: `Failed to compile ${theme}, check the console for more info.`,
+                    type: Toasts.Type.FAILURE,
+                    id: Toasts.genId(),
+                    options: {
+                        position: Toasts.Position.BOTTOM
+                    }
+                });
+                continue;
+            }
+
+            const blob = new Blob([css], { type: "text/css" });
+            links.push(URL.createObjectURL(blob));
+        }
     }
 
     themesStyle.textContent = links.map(link => `@import url("${link.trim()}");`).join("\n");
@@ -85,6 +112,7 @@ document.addEventListener("DOMContentLoaded", () => {
 
     addSettingsListener("themeLinks", initThemes);
     addSettingsListener("enabledThemes", initThemes);
+    addSettingsListener("userCssVars", initThemes, false);
 
     if (!IS_WEB)
         VencordNative.quickCss.addThemeChangeListener(initThemes);

src/utils/themes/index.ts

@@ -0,0 +1,17 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import type { UserstyleHeader } from "usercss-meta";
+
+import type { UserThemeHeader } from "./bd";
+
+export type ThemeHeader = {
+    type: "other";
+    header: UserThemeHeader;
+} | {
+    type: "usercss";
+    header: UserstyleHeader;
+};

src/utils/themes/usercss/compiler.ts

@@ -0,0 +1,109 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Settings } from "@api/Settings";
+import { getLess, getStylus } from "@utils/dependencies";
+import { Logger } from "@utils/Logger";
+
+import { usercssParse } from ".";
+
+const UserCSSLogger = new Logger("UserCSS:Compiler", "#d2acf5");
+
+const preprocessors: { [preprocessor: string]: (text: string, vars: Record<string, string>) => Promise<string>; } = {
+    async default(text: string, vars: Record<string, string>) {
+        const variables = Object.entries(vars)
+            .map(([name, value]) => `--${name}: ${value}`)
+            .join("; ");
+
+        return `/* ==Vencord== */\n:root{${variables}}\n/* ==/Vencord== */${text}`;
+    },
+
+    async uso(text: string, vars: Record<string, string>) {
+        for (const [k, v] of Object.entries(vars)) {
+            text = text.replace(new RegExp(`\\/\\*\\[\\[${k}\\]\\]\\*\\/`, "g"), v);
+        }
+
+        return text;
+    },
+
+    async stylus(text: string, vars: Record<string, string>) {
+        const StylusRenderer = await getStylus();
+
+        const variables = Object.entries(vars)
+            .map(([name, value]) => `${name} = ${value}`)
+            .join("\n");
+
+        const stylusDoc = `// ==Vencord==\n${variables}\n// ==/Vencord==\n${text}`;
+
+        return new StylusRenderer(stylusDoc).render();
+    },
+
+    async less(text: string, vars: Record<string, string>) {
+        const less = await getLess();
+
+        const variables = Object.entries(vars)
+            .map(([name, value]) => `@${name}: ${value};`)
+            .join("\n");
+
+        const lessDoc = `// ==Vencord==\n${variables}\n// ==/Vencord==\n${text}`;
+
+        return less.render(lessDoc).then(r => r.css);
+    }
+};
+
+export async function compileUsercss(fileName: string) {
+    const themeData = await VencordNative.themes.getThemeData(fileName);
+    if (!themeData) return null;
+
+    // UserCSS preprocessor order look like this:
+    // - use the preprocessor defined
+    // - if variables are set, `uso`
+    // - otherwise, `default`
+    const { vars = {}, preprocessor = Object.keys(vars).length > 0 ? "uso" : "default", id } = await usercssParse(themeData, fileName);
+
+    const preprocessorFn = preprocessors[preprocessor];
+
+    if (!preprocessorFn) {
+        UserCSSLogger.error("File", fileName, "requires preprocessor", preprocessor, "which isn't known to Vencord");
+        return null;
+    }
+
+    const varsToPass = {};
+
+    for (const [k, v] of Object.entries(vars)) {
+        varsToPass[k] = Settings.userCssVars[id]?.[k] ?? v.default;
+
+        switch (v.type) {
+            case "checkbox": {
+                if (["less", "stylus"].includes(preprocessor)) {
+                    varsToPass[k] = varsToPass[k] === "1" ? "true" : "false";
+                }
+                break;
+            }
+
+            case "range": {
+                varsToPass[k] = `${varsToPass[k]}${v.units ?? "px"}`;
+                break;
+            }
+
+            case "text": {
+                if (preprocessor === "stylus") {
+                    varsToPass[k] = `"${varsToPass[k].replace(/"/g, "\" + '\"' + \"")}"`;
+                } else {
+                    varsToPass[k] = `"${varsToPass[k].replace(/\//g, "\\\\").replace(/"/g, '\\"')}"`;
+                }
+                break;
+            }
+        }
+    }
+
+    try {
+        return await preprocessorFn(themeData, varsToPass);
+    } catch (error) {
+        UserCSSLogger.error("File", fileName, "failed to compile with preprocessor", preprocessor, error);
+        return null;
+    }
+}

src/utils/themes/usercss/index.ts

@@ -0,0 +1,44 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { Logger } from "@utils/Logger";
+import { parse as originalParse, UserstyleHeader } from "usercss-meta";
+
+const UserCSSLogger = new Logger("UserCSS", "#d2acf5");
+
+export async function usercssParse(text: string, fileName: string): Promise<UserstyleHeader> {
+    const { metadata, errors } = originalParse(text.replace(/\r/g, ""), {
+        allowErrors: true,
+        unknownKey: "assign"
+    });
+
+    if (errors.length) {
+        UserCSSLogger.warn("Parsed", fileName, "with errors:", errors);
+    }
+
+    const requiredPlugins = metadata["vc-requiredPlugins"]?.split(",").map(p => p.trim());
+
+    return {
+        ...metadata,
+        fileName,
+        id: await getUserCssId(metadata),
+        requiredPlugins
+    };
+}
+
+export async function getUserCssId(header: UserstyleHeader): Promise<string> {
+    const encoder = new TextEncoder();
+
+    const nameBuf = encoder.encode(header.name);
+    const namespaceBuf = encoder.encode(header.namespace);
+
+    const nameHash = new Uint8Array(await window.crypto.subtle.digest("SHA-256", nameBuf));
+    const namespaceHash = new Uint8Array(await window.crypto.subtle.digest("SHA-256", namespaceBuf));
+
+    const idHash = await window.crypto.subtle.digest("SHA-256", new Uint8Array([...nameHash, ...namespaceHash]));
+
+    return window.btoa(String.fromCharCode(...new Uint8Array(idHash))).substring(0, 43); // base64 adds one more padding character
+}

src/utils/themes/usercss/usercss-meta.d.ts

@@ -0,0 +1,134 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+declare module "usercss-meta" {
+    import { Simplify } from "type-fest";
+
+    export type UserCSSVariable = Simplify<{ name: string; label: string; } & (
+        | {
+            type: "text";
+            default: string;
+        }
+        | {
+            type: "color";
+            // Hex, rgb(), rgba()
+            default: string;
+        }
+        | {
+            type: "checkbox";
+            default: boolean;
+        }
+        | {
+            type: "range";
+            default: number;
+            min?: number;
+            max?: number;
+            step?: number;
+            units?: string;
+        }
+        | {
+            type: "number";
+            default: number;
+        }
+        | {
+            type: "select";
+            default: string;
+            options: { name: string; label: string; value: string; }[];
+        }
+    )>;
+
+    export interface UserstyleHeader {
+        /**
+         * The unique ID of the UserCSS style.
+         *
+         * @vencord Specific to Vencord, not part of the original module.
+         */
+        id: string;
+
+        /**
+         * The file name of the UserCSS style.
+         *
+         * @vencord Specific to Vencord, not part of the original module.
+         */
+        fileName: string;
+
+        /**
+         * The required plugins for this style.
+         *
+         * @vencord Specific to Vencord, not part of the original module.
+         * @see {@link vc-requiredPlugins}
+         */
+        requiredPlugins?: string[];
+
+        /**
+         * The name of your style.
+         *
+         * The combination of {@link name} and {@link namespace} must be unique.
+         */
+        name: string;
+        /**
+         * The namespace of the style. Helps to distinguish between styles with the same name.
+         *
+         * The combination of {@link name} and {@link namespace} must be unique.
+         */
+        namespace: string;
+        /**
+         * The version of your style.
+         */
+        version: string;
+
+        /**
+         * A short significant description.
+         */
+        description?: string;
+        /**
+         * The author of the style.
+         */
+        author?: string;
+        /**
+         * The project's homepage.
+         *
+         * This is not an update URL. See {@link updateURL}.
+         */
+        homepageURL?: string;
+        /**
+         * The URL the user can report issues to the style author.
+         */
+        supportURL?: string;
+        /**
+         * The URL used when updating the style.
+         */
+        updateURL?: string;
+        /**
+         * The SPDX license identifier for this style. If none is included, the style is assumed to be All Rights Reserved.
+         */
+        license?: string;
+        /**
+         * The CSS preprocessor used to write this style.
+         */
+        preprocessor?: "default" | "uso" | "less" | "stylus";
+
+        /**
+         * A list of variables the style defines.
+         */
+        vars: Record<string, UserCSSVariable>;
+
+        /**
+         * Required plugins for this style to work. Comma-separated list of plugin names.
+         *
+         * @vencord This is a Vencord-specific extension, however we wish for this to become a standard for client mods
+         *          to implement, hence the more generic namespaced name.
+         */
+        "vc-requiredPlugins"?: string;
+    }
+
+    type UserCSSParseOptions = {
+        allowErrors: boolean;
+        unknownKey: "assign";
+    };
+
+    export function parse(text: string, options: UserCSSParseOptions): { metadata: UserstyleHeader; errors: { code: string; args: any; }[]; };
+}

src/webpack/common/types/components.d.ts

@@ -191,7 +191,7 @@ export type TextArea = ComponentType<PropsWithRef<Omit<HTMLProps<HTMLTextAreaEle
     onChange(v: string): void;
 }>>;
 
-interface SelectOption {
+export interface SelectOption {
     disabled?: boolean;
     value: any;
     label: string;