add alwaysShowTitleTextInFullscreen flag

atom/browser/native_window_mac.h

@@ -133,6 +133,9 @@ class NativeWindowMac : public NativeWindow,
 
   bool zoom_to_page_width() const { return zoom_to_page_width_; }
 
+  bool always_show_title_text_in_full_screen() const
+  { return always_show_title_text_in_full_screen_; }
+
  protected:
   // Return a vector of non-draggable regions that fill a window of size
   // |width| by |height|, but leave gaps where the window should be draggable.
@@ -177,6 +180,8 @@ class NativeWindowMac : public NativeWindow,
 
   bool zoom_to_page_width_;
 
+  bool always_show_title_text_in_full_screen_;
+
   NSInteger attention_request_id_;  // identifier from requestUserAttention
 
   // The presentation options before entering kiosk mode.

atom/browser/native_window_mac.mm

@@ -340,11 +340,14 @@ bool ScopedDisableResize::disable_resize_ = false;
   // titlebar is expected to be empty, but after entering fullscreen mode we
   // have to set one, because title bar is visible here.
   NSWindow* window = shell_->GetNativeWindow();
+
   if ((shell_->transparent() || !shell_->has_frame()) &&
       base::mac::IsAtLeastOS10_10() &&
       // FIXME(zcbenz): Showing titlebar for hiddenInset window is weird under
       // fullscreen mode.
-      shell_->title_bar_style() != atom::NativeWindowMac::HIDDEN_INSET) {
+      // Show title if always_show_title_text_in_full_screen flag is set
+      (shell_->title_bar_style() != atom::NativeWindowMac::HIDDEN_INSET ||
+    shell_->always_show_title_text_in_full_screen())) {
     [window setTitleVisibility:NSWindowTitleVisible];
   }
 
@@ -368,7 +371,8 @@ bool ScopedDisableResize::disable_resize_ = false;
   NSWindow* window = shell_->GetNativeWindow();
   if ((shell_->transparent() || !shell_->has_frame()) &&
       base::mac::IsAtLeastOS10_10() &&
-      shell_->title_bar_style() != atom::NativeWindowMac::HIDDEN_INSET) {
+      (shell_->title_bar_style() != atom::NativeWindowMac::HIDDEN_INSET ||
+    shell_->always_show_title_text_in_full_screen())) {
     [window setTitleVisibility:NSWindowTitleHidden];
   }
 
@@ -798,6 +802,7 @@ NativeWindowMac::NativeWindowMac(
       is_kiosk_(false),
       was_fullscreen_(false),
       zoom_to_page_width_(false),
+      always_show_title_text_in_full_screen_(false),
       attention_request_id_(0),
       title_bar_style_(NORMAL) {
   int width = 800, height = 600;
@@ -945,6 +950,8 @@ NativeWindowMac::NativeWindowMac(
 
   options.Get(options::kZoomToPageWidth, &zoom_to_page_width_);
 
+  options.Get(options::kAlwaysShowTitleTextInFullscreen, &always_show_title_text_in_full_screen_);
+
   // Enable the NSView to accept first mouse event.
   bool acceptsFirstMouse = false;
   options.Get(options::kAcceptFirstMouse, &acceptsFirstMouse);

atom/common/options_switches.cc

@@ -48,6 +48,10 @@ const char kUseContentSize[] = "useContentSize";
 // Whether window zoom should be to page width.
 const char kZoomToPageWidth[] = "zoomToPageWidth";
 
+// Whether always show title text in full screen is enabled.
+const char kAlwaysShowTitleTextInFullscreen[] =
+"alwaysShowTitleTextInFullscreen";
+
 // The requested title bar style for the window
 const char kTitleBarStyle[] = "titleBarStyle";
 

atom/common/options_switches.h

@@ -35,6 +35,7 @@ extern const char kAlwaysOnTop[];
 extern const char kAcceptFirstMouse[];
 extern const char kUseContentSize[];
 extern const char kZoomToPageWidth[];
+extern const char kAlwaysShowTitleTextInFullscreen[];
 extern const char kTitleBarStyle[];
 extern const char kTabbingIdentifier[];
 extern const char kAutoHideMenuBar[];

docs/api/browser-window.md

@@ -225,6 +225,9 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
       display unless hovered over in the top left of the window. These custom
       buttons prevent issues with mouse events that occur with the standard
       window toolbar buttons. **Note:** This option is currently experimental.
+  * `alwaysShowTitleTextInFullscreen` Boolean (optional) - Shows the title in
+      tile bar in full screen mode on macOS with all `titleBarStyle` options.
+      Default is `false`.
   * `thickFrame` Boolean (optional) - Use `WS_THICKFRAME` style for frameless windows on
     Windows, which adds standard window frame. Setting it to `false` will remove
     window shadow and window animations. Default is `true`.