fix: menu bar visibility when exiting full screen (#38599)

shell/browser/native_window_views.cc

@@ -731,10 +731,14 @@ void NativeWindowViews::SetFullScreen(bool fullscreen) {
                                             gfx::Rect());
 
   // Auto-hide menubar when in fullscreen.
-  if (fullscreen)
+  if (fullscreen) {
+    menu_bar_visible_before_fullscreen_ = IsMenuBarVisible();
     SetMenuBarVisibility(false);
-  else
-    SetMenuBarVisibility(!IsMenuBarAutoHide());
+  } else {
+    SetMenuBarVisibility(!IsMenuBarAutoHide() &&
+                         menu_bar_visible_before_fullscreen_);
+    menu_bar_visible_before_fullscreen_ = false;
+  }
 #endif
 }
 

shell/browser/native_window_views.h

@@ -321,6 +321,9 @@ class NativeWindowViews : public NativeWindow,
   // Handles unhandled keyboard messages coming back from the renderer process.
   views::UnhandledKeyboardEventHandler keyboard_event_handler_;
 
+  // Whether the menubar is visible before the window enters fullscreen
+  bool menu_bar_visible_before_fullscreen_ = false;
+
   // Whether the window should be enabled based on user calls to SetEnabled()
   bool is_enabled_ = true;
   // How many modal children this window has;

spec/api-browser-window-spec.ts

@@ -5353,6 +5353,48 @@ describe('BrowserWindow module', () => {
       });
     });
 
+    ifdescribe(process.platform !== 'darwin')('when fullscreen state is changed', () => {
+      it('correctly remembers state prior to fullscreen change', async () => {
+        const w = new BrowserWindow({ show: false });
+        expect(w.isMenuBarVisible()).to.be.true('isMenuBarVisible');
+        w.setMenuBarVisibility(false);
+        expect(w.isMenuBarVisible()).to.be.false('isMenuBarVisible');
+
+        const enterFS = once(w, 'enter-full-screen');
+        w.setFullScreen(true);
+        await enterFS;
+        expect(w.fullScreen).to.be.true('not fullscreen');
+
+        const exitFS = once(w, 'leave-full-screen');
+        w.setFullScreen(false);
+        await exitFS;
+        expect(w.fullScreen).to.be.false('not fullscreen');
+
+        expect(w.isMenuBarVisible()).to.be.false('isMenuBarVisible');
+      });
+
+      it('correctly remembers state prior to fullscreen change with autoHide', async () => {
+        const w = new BrowserWindow({ show: false });
+        expect(w.autoHideMenuBar).to.be.false('autoHideMenuBar');
+        w.autoHideMenuBar = true;
+        expect(w.autoHideMenuBar).to.be.true('autoHideMenuBar');
+        w.setMenuBarVisibility(false);
+        expect(w.isMenuBarVisible()).to.be.false('isMenuBarVisible');
+
+        const enterFS = once(w, 'enter-full-screen');
+        w.setFullScreen(true);
+        await enterFS;
+        expect(w.fullScreen).to.be.true('not fullscreen');
+
+        const exitFS = once(w, 'leave-full-screen');
+        w.setFullScreen(false);
+        await exitFS;
+        expect(w.fullScreen).to.be.false('not fullscreen');
+
+        expect(w.isMenuBarVisible()).to.be.false('isMenuBarVisible');
+      });
+    });
+
     ifdescribe(process.platform === 'darwin')('fullscreenable state', () => {
       it('with functions', () => {
         it('can be set with fullscreenable constructor option', () => {