Default dimensions scale value to 1.0 if window is nil (microsoft#1970)

* [0.73] Default scale to 1.0 on if window is nil

* Unify RCTExportedDimensions between iOS & macOS

* Use typedef instead of #define for NSWindow

Author: shwanton

packages/react-native/React/Base/RCTUIKit.h

@@ -486,8 +486,10 @@ NS_ASSUME_NONNULL_END
 
 #if !TARGET_OS_OSX
 typedef UIApplication RCTUIApplication;
+typedef UIWindow RCTUIWindow;
 #else
 typedef NSApplication RCTUIApplication;
+typedef NSWindow RCTUIWindow;
 #endif
 
 //

packages/react-native/React/Base/RCTUtils.h

@@ -93,13 +93,13 @@ RCT_EXTERN BOOL RCTRunningInAppExtension(void);
 #endif // [macOS]
 
 // Returns the shared UIApplication instance, or nil if running in an App Extension
-RCT_EXTERN UIApplication *__nullable RCTSharedApplication(void);
+RCT_EXTERN RCTUIApplication *__nullable RCTSharedApplication(void); // [macOS]
 
-#if !TARGET_OS_OSX // [macOS]
 // Returns the current main window, useful if you need to access the root view
 // or view controller
-RCT_EXTERN UIWindow *__nullable RCTKeyWindow(void);
+RCT_EXTERN RCTUIWindow *__nullable RCTKeyWindow(void); // [macOS]
 
+#if !TARGET_OS_OSX // [macOS]
 // Returns the presented view controller, useful if you need
 // e.g. to present a modal view controller or alert over it
 RCT_EXTERN UIViewController *__nullable RCTPresentedViewController(void);

packages/react-native/React/Base/RCTUtils.m

@@ -581,7 +581,7 @@ BOOL RCTRunningInAppExtension(void)
 }
 #endif // [macOS]
 
-UIApplication *__nullable RCTSharedApplication(void)
+RCTUIApplication *__nullable RCTSharedApplication(void) // [macOS]
 {
 #if !TARGET_OS_OSX // [macOS]
   if (RCTRunningInAppExtension()) {
@@ -593,9 +593,9 @@ BOOL RCTRunningInAppExtension(void)
 #endif // macOS]
 }
 
-#if !TARGET_OS_OSX // [macOS]
-UIWindow *__nullable RCTKeyWindow(void)
+RCTUIWindow *__nullable RCTKeyWindow(void) // [macOS]
 {
+#if !TARGET_OS_OSX // [macOS]
   if (RCTRunningInAppExtension()) {
     return nil;
   }
@@ -615,6 +615,9 @@ BOOL RCTRunningInAppExtension(void)
   }
 
   return nil;
+#else // [macOS
+  return [NSApp keyWindow];
+@end // macOS]
 }
 
 UIViewController *__nullable RCTPresentedViewController(void)

packages/react-native/React/CoreModules/RCTDeviceInfo.mm

@@ -136,13 +136,14 @@ - (NSDictionary *)_exportedDimensions
   RCTAssert(_moduleRegistry, @"ModuleRegistry must be set to properly init dimensions");
   RCTAccessibilityManager *accessibilityManager =
       (RCTAccessibilityManager *)[_moduleRegistry moduleForName:"AccessibilityManager"];
-  CGFloat fontScale = accessibilityManager ? accessibilityManager.multiplier : 1.0;
+  RCTAssert(accessibilityManager, @"Failed to get exported dimensions: AccessibilityManager is nil");
 #if !TARGET_OS_OSX // [macOS]
-  return RCTExportedDimensions(fontScale);
+  CGFloat fontScale = accessibilityManager ? accessibilityManager.multiplier : 1.0;
 #else // [macOS
-  // TODO: Saad - get root view here
-  return RCTExportedDimensions(nil);
+  CGFloat fontScale = 1.0;
 #endif // macOS]
+  
+  return RCTExportedDimensions(fontScale);
 }
 
 - (NSDictionary<NSString *, id> *)constantsToExport

packages/react-native/React/UIUtils/RCTUIUtils.h

@@ -22,11 +22,7 @@ typedef struct {
   } window, screen;
 } RCTDimensions;
 extern __attribute__((visibility("default")))
-#if !TARGET_OS_OSX // [macOS]
 RCTDimensions RCTGetDimensions(CGFloat fontScale);
-#else // [macOS
-RCTDimensions RCTGetDimensions(RCTPlatformView *rootView);
-#endif // macOS]
 
 #if !TARGET_OS_OSX // [macOS]
 // Get font size multiplier for font base size (Large) by content size category

packages/react-native/React/UIUtils/RCTUIUtils.m

@@ -9,11 +9,7 @@
 
 #import "RCTUtils.h"
 
-#if !TARGET_OS_OSX // [macOS]
 RCTDimensions RCTGetDimensions(CGFloat fontScale)
-#else // [macOS
-RCTDimensions RCTGetDimensions(RCTPlatformView *rootView)
-#endif // macOS]
 {
 #if !TARGET_OS_OSX // [macOS]
   UIScreen *mainScreen = UIScreen.mainScreen;
@@ -23,20 +19,11 @@ RCTDimensions RCTGetDimensions(RCTPlatformView *rootView)
   // We fallback to screen size if a key window is not found.
   CGSize windowSize = mainWindow ? mainWindow.bounds.size : screenSize;
 #else // [macOS
-  NSWindow *window = nil;
-  NSSize windowSize;
-  NSSize screenSize;
-  if (rootView != nil) {
-	  window = [rootView window];
-	  windowSize = [window frame].size;
-  } else {
-    // We don't have a root view so fall back to the app's key window
-    window = [NSApp keyWindow];
-    windowSize = [window frame].size;
-  }
-  screenSize = [[window screen] frame].size;
-#endif
-
+  RCTUIWindow *window = RCTKeyWindow();
+  NSSize windowSize = window ? [window frame].size : CGSizeMake(0, 0);
+  NSSize screenSize = window ? [[window screen] frame].size : CGSizeMake(0, 0);
+  CGFloat scale = window ? [[window screen] backingScaleFactor] : 1.0; // Default scale to 1.0 if window is nil
+#endif // macOS
   RCTDimensions result;
 #if !TARGET_OS_OSX // [macOS]
   typeof(result.screen) dimsScreen = {
@@ -47,13 +34,13 @@ RCTDimensions RCTGetDimensions(RCTPlatformView *rootView)
   typeof(result.screen) dimsScreen = {
       .width = screenSize.width, 
       .height = screenSize.height, 
-      .scale = [[window screen] backingScaleFactor],
-      .fontScale = 1};
+      .scale = scale,
+      .fontScale = fontScale};
   typeof(result.window) dimsWindow = {
       .width = windowSize.width, 
       .height = windowSize.height, 
-      .scale = [[window screen] backingScaleFactor], 
-      .fontScale = 1};
+      .scale = scale,
+      .fontScale = fontScale};
 #endif // macOS]
   result.screen = dimsScreen;
   result.window = dimsWindow;