NS{Cell,View}: implement stubs for layout direction handling

Implement stubs for the layout direction properties in NSCell and
NSView. Currently, they default to left-to-right layouting.

Headers/AppKit/NSCell.h

@@ -41,6 +41,7 @@
 #import <AppKit/NSText.h>
 // for NSFocusRingType
 #import <AppKit/NSView.h>
+#import <AppKit/NSUserInterfaceLayout.h>
 
 @class NSString;
 @class NSMutableDictionary;
@@ -278,6 +279,15 @@ enum {
 - (void)setFocusRingType:(NSFocusRingType)type;
 #endif
 
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_8, GS_API_LATEST)
+#if GS_HAS_DECLARED_PROPERTIES
+@property NSUserInterfaceLayoutDirection userInterfaceLayoutDirection;
+#else
+- (NSUserInterfaceLayoutDirection) userInterfaceLayoutDirection;
+- (void) setUserInterfaceLayoutDirection: (NSUserInterfaceLayoutDirection)dir;
+#endif
+#endif
+
 //
 // Setting the NSCell's State 
 //

Headers/AppKit/NSView.h

@@ -36,6 +36,7 @@
 
 #import <AppKit/NSGraphicsContext.h>
 #import <AppKit/NSResponder.h>
+#import <AppKit/NSUserInterfaceLayout.h>
 
 @class NSArray;
 @class NSAttributedString;
@@ -628,6 +629,15 @@ PACKAGE_SCOPE
 #endif
 #endif
 
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_8, GS_API_LATEST)
+#if GS_HAS_DECLARED_PROPERTIES
+@property NSUserInterfaceLayoutDirection userInterfaceLayoutDirection;
+#else
+- (NSUserInterfaceLayoutDirection) userInterfaceLayoutDirection;
+- (void) setUserInterfaceLayoutDirection: (NSUserInterfaceLayoutDirection)dir;
+#endif
+#endif
+
 @end
 
 

Source/NSCell.m

@@ -2848,6 +2848,18 @@ static NSColor *dtxtCol;
     }
   return self;
 }
+
+- (NSUserInterfaceLayoutDirection) userInterfaceLayoutDirection
+{
+  // FIXME
+  return NSUserInterfaceLayoutDirectionLeftToRight;
+}
+
+- (void) setUserInterfaceLayoutDirection: (NSUserInterfaceLayoutDirection)dir
+{
+  // FIXME: implement this
+  return;
+}
 @end
 
 @implementation NSCell (PrivateMethods)

Source/NSView.m

@@ -5120,6 +5120,18 @@ static NSView* findByTag(NSView *view, NSInteger aTag, NSUInteger *level)
     }
 }
 
+- (NSUserInterfaceLayoutDirection) userInterfaceLayoutDirection
+{
+  // FIXME
+  return NSUserInterfaceLayoutDirectionLeftToRight;
+}
+
+- (void) setUserInterfaceLayoutDirection: (NSUserInterfaceLayoutDirection)dir
+{
+  // FIXME: implement this
+  return;
+}
+
 @end
 
 @implementation NSView(KeyViewLoop)