feat(webview-window): add set_simple_fullscreen to WebviewWindow

.changes/webview-set-simple-fullscreen.md

@@ -0,0 +1,7 @@
+---
+'tauri': 'minor:feat'
+---
+
+Add `set_simple_fullscreen` method to `WebviewWindow`.
+
+This method was already available on the `Window` type and is now also available on `WebviewWindow` for consistency. On macOS, it toggles fullscreen mode without creating a new macOS Space. On other platforms, it falls back to regular fullscreen.

crates/tauri/src/webview/mod.rs

@@ -2312,4 +2312,25 @@ mod tests {
     crate::test_utils::assert_send::<super::Webview>();
     crate::test_utils::assert_sync::<super::Webview>();
   }
+
+  #[cfg(target_os = "macos")]
+  #[test]
+  fn test_webview_window_has_set_simple_fullscreen_method() {
+    use crate::test::{mock_builder, mock_context, noop_assets};
+
+    // Create a mock app with proper context
+    let app = mock_builder().build(mock_context(noop_assets())).unwrap();
+
+    // Get or create a webview window
+    let webview_window =
+      crate::WebviewWindowBuilder::new(&app, "test", crate::WebviewUrl::default())
+        .build()
+        .unwrap();
+
+    // This should compile if set_simple_fullscreen exists
+    let result = webview_window.set_simple_fullscreen(true);
+
+    // We expect this to work without panicking
+    assert!(result.is_ok(), "set_simple_fullscreen should succeed");
+  }
 }

crates/tauri/src/webview/webview_window.rs

@@ -2057,6 +2057,33 @@ impl<R: Runtime> WebviewWindow<R> {
     self.window.set_fullscreen(fullscreen)
   }
 
+  /// Toggles a fullscreen mode that doesn't require a new macOS space.
+  ///
+  /// This is how fullscreen used to work on macOS in versions before Lion.
+  /// It allows the user to have a fullscreen window without using another space
+  /// or taking control over the entire monitor.
+  ///
+  /// ## Platform-specific
+  ///
+  /// - **macOS:** Uses native simple fullscreen mode.
+  /// - **Other platforms:** Falls back to [`Self::set_fullscreen`].
+  #[cfg(target_os = "macos")]
+  pub fn set_simple_fullscreen(&self, fullscreen: bool) -> crate::Result<()> {
+    self.window.set_simple_fullscreen(fullscreen)
+  }
+
+  /// Toggles a fullscreen mode that doesn't require a new macOS space.
+  ///
+  /// On non-macOS platforms, this method falls back to regular fullscreen behavior.
+  ///
+  /// ## Platform-specific
+  ///
+  /// - **Other platforms:** Falls back to [`Self::set_fullscreen`].
+  #[cfg(not(target_os = "macos"))]
+  pub fn set_simple_fullscreen(&self, fullscreen: bool) -> crate::Result<()> {
+    self.set_fullscreen(fullscreen)
+  }
+
   /// Bring the window to front and focus.
   pub fn set_focus(&self) -> crate::Result<()> {
     self.window.set_focus()