transparent-emacs-mac-title-bar.diff

--- mituharu-emacs-mac-b5e5c4a6234d/src/macappkit.m	2017-02-04 13:21:43.000000000 +0800
+++ mituharu-emacs-mac/src/macappkit.m	2017-03-31 22:58:41.000000000 +0800
@@ -1824,6 +1824,14 @@
 
 @implementation EmacsWindow
 
++ (NSButton *)standardWindowButton:(NSWindowButton)b forStyleMask:(NSWindowStyleMask)styleMask
+{
+  if(b == NSWindowDocumentIconButton || b == NSWindowDocumentVersionsButton) {
+    return nil;
+  }
+  return [NSWindow standardWindowButton:b forStyleMask:styleMask];
+}
+
 - (instancetype)initWithContentRect:(NSRect)contentRect
 			  styleMask:(NSWindowStyleMask)windowStyle
 			    backing:(NSBackingStoreType)bufferingType
@@ -2267,6 +2275,8 @@
       [window setOpaque:NO];
       FRAME_BACKGROUND_ALPHA_ENABLED_P (f) = true;
     }
+  window.titlebarAppearsTransparent = true;
+  window.appearance = [NSAppearance appearanceNamed: NSAppearanceNameVibrantDark];
   [[window contentView] addSubview:emacsView];
   [self updateBackingScaleFactor];