gtk: add apprt action and keybinding for toggling top menu

include/ghostty.h

@@ -571,6 +571,7 @@ typedef enum {
   GHOSTTY_ACTION_TOGGLE_WINDOW_DECORATIONS,
   GHOSTTY_ACTION_TOGGLE_QUICK_TERMINAL,
   GHOSTTY_ACTION_TOGGLE_VISIBILITY,
+  GHOSTTY_ACTION_TOGGLE_TOP_MENU,
   GHOSTTY_ACTION_MOVE_TAB,
   GHOSTTY_ACTION_GOTO_TAB,
   GHOSTTY_ACTION_GOTO_SPLIT,

src/Surface.zig

@@ -4211,6 +4211,12 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
             .toggle,
         ),
 
+        .toggle_top_menu => try self.rt_app.performAction(
+            .{ .surface = self },
+            .toggle_top_menu,
+            {},
+        ),
+
         .select_all => {
             const sel = self.io.terminal.screen.selectAll();
             if (sel) |s| {

src/apprt/action.zig

@@ -110,6 +110,9 @@ pub const Action = union(Key) {
     /// Toggle the visibility of all Ghostty terminal windows.
     toggle_visibility,
 
+    /// Toggle whether the top menu is shown.
+    toggle_top_menu,
+
     /// Moves a tab by a relative offset.
     ///
     /// Adjusts the tab position based on `offset` (e.g., -1 for left, +1
@@ -240,6 +243,7 @@ pub const Action = union(Key) {
         toggle_window_decorations,
         toggle_quick_terminal,
         toggle_visibility,
+        toggle_top_menu,
         move_tab,
         goto_tab,
         goto_split,

src/apprt/glfw.zig

@@ -223,6 +223,7 @@ pub const App = struct {
             .toggle_window_decorations,
             .toggle_quick_terminal,
             .toggle_visibility,
+            .toggle_top_menu,
             .goto_tab,
             .move_tab,
             .inspector,

src/apprt/gtk/App.zig

@@ -501,6 +501,7 @@ pub fn performAction(
         }),
         .toggle_maximize => self.toggleMaximize(target),
         .toggle_fullscreen => self.toggleFullscreen(target, value),
+        .toggle_top_menu => self.toggleTopMenu(target),
 
         .new_tab => try self.newTab(target),
         .close_tab => try self.closeTab(target),
@@ -783,6 +784,21 @@ fn toggleWindowDecorations(
     }
 }
 
+fn toggleTopMenu(_: *App, target: apprt.Target) void {
+    switch (target) {
+        .app => {},
+        .surface => |v| {
+            const window = v.rt_surface.container.window() orelse {
+                log.info(
+                    "toggleTopMenu invalid for container={s}",
+                    .{@tagName(v.rt_surface.container)},
+                );
+                return;
+            };
+            window.toggleTopMenu();
+        },
+    }
+}
 fn quitTimer(self: *App, mode: apprt.action.QuitTimer) void {
     switch (mode) {
         .start => self.startQuitTimer(),

src/apprt/gtk/Window.zig

@@ -155,7 +155,6 @@ pub fn init(self: *Window, app: *App) !void {
     self.top_menu_revealer = @ptrCast(@alignCast(c.gtk_revealer_new()));
     c.gtk_revealer_set_child(self.top_menu_revealer, self.top_menu.asWidget());
     c.gtk_revealer_set_transition_type(self.top_menu_revealer, c.GTK_REVEALER_TRANSITION_TYPE_SLIDE_DOWN);
-    c.gtk_revealer_set_reveal_child(self.top_menu_revealer, 1);
 
     // Setup our notebook
     self.notebook.init();
@@ -643,6 +642,12 @@ pub fn toggleWindowDecorations(self: *Window) void {
     self.updateConfig(&self.app.config) catch {};
 }
 
+/// Toggle top menu.
+pub fn toggleTopMenu(self: *Window) void {
+    const is_revealed = c.gtk_revealer_get_reveal_child(self.top_menu_revealer) != 0;
+    c.gtk_revealer_set_reveal_child(self.top_menu_revealer, @intFromBool(!is_revealed));
+}
+
 /// Grabs focus on the currently selected tab.
 pub fn focusCurrentTab(self: *Window) void {
     const tab = self.notebook.currentTab() orelse return;

src/input/Binding.zig

@@ -450,6 +450,10 @@ pub const Action = union(enum) {
     /// This currently only works on macOS.
     toggle_visibility: void,
 
+    /// Show/hide the application menu that appears below the titlebar and above
+    /// the tab bar.
+    toggle_top_menu: void,
+
     /// Quit ghostty.
     quit: void,
 
@@ -758,6 +762,7 @@ pub const Action = union(enum) {
             .goto_tab,
             .move_tab,
             .toggle_tab_overview,
+            .toggle_top_menu,
             .new_split,
             .goto_split,
             .toggle_split_zoom,