[v3 mac] Better main thread calls

v3/pkg/application/application.go

@@ -147,6 +147,7 @@ type (
 		getPrimaryScreen() (*Screen, error)
 		getScreens() ([]*Screen, error)
 		GetFlags(options Options) map[string]any
+		isOnMainThread() bool
 	}
 
 	runnable interface {
@@ -585,6 +586,12 @@ func (a *App) Clipboard() *Clipboard {
 }
 
 func (a *App) dispatchOnMainThread(fn func()) {
+	// If we are on the main thread, just call the function
+	if a.impl.isOnMainThread() {
+		fn()
+		return
+	}
+
 	mainThreadFunctionStoreLock.Lock()
 	id := generateFunctionStoreID()
 	mainThreadFunctionStore[id] = fn

v3/pkg/application/mainthread_darwin.go

@@ -16,9 +16,17 @@ static void dispatchOnMainThread(unsigned int id) {
 	});
 }
 
+static bool onMainThread() {
+	return [NSThread isMainThread];
+}
+
 */
 import "C"
 
+func (m *macosApp) isOnMainThread() bool {
+	return bool(C.onMainThread())
+}
+
 func (m *macosApp) dispatchOnMainThread(id uint) {
 	C.dispatchOnMainThread(C.uint(id))
 }

v3/pkg/application/webview_window_darwin.go

@@ -829,6 +829,11 @@ type macosWebviewWindow struct {
 	parent   *WebviewWindow
 }
 
+func (w *macosWebviewWindow) startResize(border string) error {
+	// Not needed right now
+	return nil
+}
+
 func (w *macosWebviewWindow) focus() {
 	w.show()
 }
@@ -1212,13 +1217,10 @@ func (w *macosWebviewWindow) setBackgroundColour(colour RGBA) {
 
 func (w *macosWebviewWindow) position() (int, int) {
 	var x, y C.int
-	var wg sync.WaitGroup
+	invokeSync(func() {
-	wg.Add(1)
-	go globalApplication.dispatchOnMainThread(func() {
 		C.windowGetPosition(w.nsWindow, &x, &y)
-		wg.Done()
 	})
-	wg.Wait()
+
 	return int(x), int(y)
 }