feat(macos): add setters to set title bar style on macOS (#926)

* feat(macos): add setters to set title bar style on macOS

* fix: bool to BOOL

.changes/feat-set-title-bar-style.md

@@ -0,0 +1,5 @@
+---
+'tao': patch
+---
+
+On macOS, add `set_fullsize_content_view` and `set_titlebar_transparent` to `Window` to set the title bar style.

src/platform/macos.rs

@@ -74,6 +74,16 @@ pub trait WindowExtMacOS {
 
   /// Returns the window's tabbing identifier.
   fn tabbing_identifier(&self) -> String;
+
+  /// The content view consumes the full size of the window.
+  ///
+  /// <https://developer.apple.com/documentation/appkit/nsfullsizecontentviewwindowmask>
+  fn set_fullsize_content_view(&self, fullsize: bool);
+
+  /// A Boolean value that indicates whether the title bar draws its background.
+  ///
+  /// <https://developer.apple.com/documentation/appkit/nswindow/1419167-titlebarappearstransparent>
+  fn set_titlebar_transparent(&self, transparent: bool);
 }
 
 impl WindowExtMacOS for Window {
@@ -141,6 +151,16 @@ impl WindowExtMacOS for Window {
   fn tabbing_identifier(&self) -> String {
     self.window.tabbing_identifier()
   }
+
+  #[inline]
+  fn set_fullsize_content_view(&self, fullsize: bool) {
+    self.window.set_fullsize_content_view(fullsize);
+  }
+
+  #[inline]
+  fn set_titlebar_transparent(&self, transparent: bool) {
+    self.window.set_titlebar_transparent(transparent);
+  }
 }
 
 /// Corresponds to `NSApplicationActivationPolicy`.

src/platform_impl/macos/window.rs

@@ -1613,6 +1613,26 @@ impl WindowExtMacOS for UnownedWindow {
       ns_string_to_rust(tabbing_identifier)
     }
   }
+
+  #[inline]
+  fn set_fullsize_content_view(&self, fullsize: bool) {
+    let mut mask = unsafe { self.ns_window.styleMask() };
+    if fullsize {
+      mask |= NSWindowStyleMask::NSFullSizeContentViewWindowMask;
+    } else {
+      mask &= !NSWindowStyleMask::NSFullSizeContentViewWindowMask;
+    }
+    self.set_style_mask_sync(mask);
+  }
+
+  #[inline]
+  fn set_titlebar_transparent(&self, transparent: bool) {
+    unsafe {
+      self
+        .ns_window
+        .setTitlebarAppearsTransparent_(transparent as BOOL);
+    }
+  }
 }
 
 impl Drop for UnownedWindow {