feat: add Cmd-B sidebar toggle shortcut (#1775)

Co-authored-by: Dr. Lukas Metzger <lukas@mba.lan>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

packages/plugin-sdk/src/manifest.ts

@@ -631,6 +631,7 @@ export const CORE_KEYBINDING_ACTIONS: readonly string[] = [
   "previousTab",
   "openCommandPalette",
   "reconnectSession",
+  "toggleSidebar",
 ];
 
 /**

src/ui/locales/en.json

@@ -1054,7 +1054,8 @@
         "actionNextTab": "Switch to next tab",
         "actionPreviousTab": "Switch to previous tab",
         "actionOpenCommandPalette": "Open quick search",
-        "actionReconnectSession": "Reconnect current session"
+        "actionReconnectSession": "Reconnect current session",
+        "actionToggleSidebar": "Toggle sidebar"
       },
       "userProfile": {
         "preset_simple": "Simple",

src/ui/shell/controller/use-shell-keybindings.ts

@@ -8,7 +8,10 @@ import {
 } from "@/lib/app-keyboard-shortcuts";
 import { getUserPreferences } from "@/main-axios";
 import { parseCustomKeybindings } from "@/api/open-tabs-api";
-import { findMatchingKeybinding } from "@/lib/keybinding-match";
+import {
+  eventMatchesCombo,
+  findMatchingKeybinding,
+} from "@/lib/keybinding-match";
 import type {
   CustomKeybinding,
   KeybindingActionType,
@@ -16,6 +19,7 @@ import type {
 import {
   GLOBAL_KEYBINDING_EVENT,
   getKeybindingAction,
+  listKeybindingDefaults,
   runKeybindingAction,
 } from "@/shell/keybinding-registry";
 import { globalShortcutHandler } from "@/lib/global-shortcut-handler";
@@ -53,7 +57,7 @@ export function useShellKeybindings({
           if (cancelled) return;
           globalKeybindingsRef.current = parseCustomKeybindings(
             prefs.customKeybindings,
-          ).filter((binding) => binding.enabled);
+          );
         })
         .catch(() => {});
     };
@@ -78,6 +82,10 @@ export function useShellKeybindings({
         (termRef?.current as TabHandle | null)?.reconnect?.();
         return;
       }
+      if (type === "toggleSidebar") {
+        regions.left.setOpen((open) => !open);
+        return;
+      }
       const currentTabs = tabsRef.current.filter(
         (tab) => !tab.parentSplitTabId,
       );
@@ -97,16 +105,32 @@ export function useShellKeybindings({
       )
         return;
       // Only actions that run anywhere; a terminal's own are its to handle.
+      const customBindings = globalKeybindingsRef.current;
       const binding = findMatchingKeybinding(
         event,
-        globalKeybindingsRef.current.filter(
-          (entry) => getKeybindingAction(entry.action.type)?.scope === "global",
+        customBindings.filter(
+          (entry) =>
+            entry.enabled &&
+            getKeybindingAction(entry.action.type)?.scope === "global",
         ),
       );
-      if (!binding) return;
+      if (binding) {
         event.preventDefault();
         event.stopPropagation();
         runKeybindingAction(binding.action);
+        return;
+      }
+
+      const defaultBinding = listKeybindingDefaults().find(
+        (entry) =>
+          !customBindings.some(
+            (custom) => custom.overridesDefaultId === entry.id,
+          ) && eventMatchesCombo(event, entry.combo),
+      );
+      if (!defaultBinding || !getKeybindingAction(defaultBinding.id)) return;
+      event.preventDefault();
+      event.stopPropagation();
+      runKeybindingAction({ type: defaultBinding.id });
     };
     const handleAction = (event: Event) =>
       runAction(

src/ui/shell/keybinding-registry.ts

@@ -84,6 +84,11 @@ const SHELL_ACTIONS: KeybindingActionDef[] = [
     "newUi.sidebar.keybindings.actionReconnectSession",
     1003,
   ),
+  shellAction(
+    "toggleSidebar",
+    "newUi.sidebar.keybindings.actionToggleSidebar",
+    1004,
+  ),
 ];
 
 export const SHELL_KEYBINDING_ACTION_IDS = SHELL_ACTIONS.map(
@@ -97,6 +102,21 @@ function install(): void {
   for (const action of SHELL_ACTIONS) {
     if (!actions.get(action.id)) actions.register(action);
   }
+  if (!defaults.get("toggleSidebar")) {
+    defaults.register({
+      id: "toggleSidebar",
+      combo: {
+        key: "KeyB",
+        isCode: true,
+        ctrl: false,
+        alt: false,
+        shift: false,
+        meta: true,
+      },
+      descriptionKey: "newUi.sidebar.keybindings.actionToggleSidebar",
+      order: 1004,
+    });
+  }
 }
 install();
 

src/ui/tests/shell/keybinding-registry.test.ts

@@ -4,6 +4,7 @@ import {
   SHELL_KEYBINDING_ACTION_IDS,
   getKeybindingAction,
   listKeybindingActions,
+  listKeybindingDefaults,
   registerKeybindingAction,
   resetKeybindingRegistry,
   runKeybindingAction,
@@ -17,6 +18,13 @@ describe("keybinding registry", () => {
       SHELL_KEYBINDING_ACTION_IDS,
     );
     expect(getKeybindingAction("nextTab")?.scope).toBe("global");
+    expect(getKeybindingAction("toggleSidebar")?.scope).toBe("global");
+    expect(listKeybindingDefaults()).toEqual([
+      expect.objectContaining({
+        id: "toggleSidebar",
+        combo: expect.objectContaining({ key: "KeyB", meta: true }),
+      }),
+    ]);
   });
 
   it("runs a shell action by telling the shell", () => {