BetterFolders: Fix scrolling

src/plugins/betterFolders/index.tsx

@@ -20,7 +20,7 @@ import { definePluginSettings } from "@api/Settings";
 import { Devs } from "@utils/constants";
 import definePlugin, { OptionType } from "@utils/types";
 import { findByPropsLazy, findStoreLazy } from "@webpack";
-import { FluxDispatcher, i18n } from "@webpack/common";
+import { FluxDispatcher, i18n, useMemo } from "@webpack/common";
 
 import FolderSideBar from "./FolderSideBar";
 
@@ -117,8 +117,8 @@ export default definePlugin({
                 },
                 // If we are rendering the Better Folders sidebar, we filter out guilds that are not in folders and unexpanded folders
                 {
-                    match: /(useStateFromStoresArray\).{0,25}let \i)=(\i\.\i.getGuildsTree\(\))/,
-                    replace: (_, rest, guildsTree) => `${rest}=$self.getGuildTree(!!arguments[0].isBetterFolders,${guildsTree},arguments[0].betterFoldersExpandedIds)`
+                    match: /\[(\i)\]=(\(0,\i\.useStateFromStoresArray\).{0,40}getGuildsTree\(\).+?}\))(?=,)/,
+                    replace: (_, originalTreeVar, rest) => `[betterFoldersOriginalTree]=${rest},${originalTreeVar}=$self.getGuildTree(!!arguments[0].isBetterFolders,betterFoldersOriginalTree,arguments[0].betterFoldersExpandedIds)`
                 },
                 // If we are rendering the Better Folders sidebar, we filter out everything but the servers and folders from the GuildsBar Guild List children
                 {
@@ -252,19 +252,21 @@ export default definePlugin({
         }
     },
 
-    getGuildTree(isBetterFolders: boolean, oldTree: any, expandedFolderIds?: Set<any>) {
-        if (!isBetterFolders || expandedFolderIds == null) return oldTree;
+    getGuildTree(isBetterFolders: boolean, originalTree: any, expandedFolderIds?: Set<any>) {
+        return useMemo(() => {
+            if (!isBetterFolders || expandedFolderIds == null) return originalTree;
 
             const newTree = new GuildsTree();
             // Children is every folder and guild which is not in a folder, this filters out only the expanded folders
-        newTree.root.children = oldTree.root.children.filter(guildOrFolder => expandedFolderIds.has(guildOrFolder.id));
+            newTree.root.children = originalTree.root.children.filter(guildOrFolder => expandedFolderIds.has(guildOrFolder.id));
             // Nodes is every folder and guild, even if it's in a folder, this filters out only the expanded folders and guilds inside them
             newTree.nodes = Object.fromEntries(
-            Object.entries(oldTree.nodes)
+                Object.entries(originalTree.nodes)
                     .filter(([_, guildOrFolder]: any[]) => expandedFolderIds.has(guildOrFolder.id) || expandedFolderIds.has(guildOrFolder.parentId))
             );
 
             return newTree;
+        }, [isBetterFolders, originalTree, expandedFolderIds]);
     },
 
     makeGuildsBarGuildListFilter(isBetterFolders: boolean) {