src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

*** 201,210 ****
--- 201,212 ----
  
      private Window target;
      private LWWindowPeer peer;
      private CPlatformView contentView;
      private CPlatformWindow owner;
+     private boolean undecorated; // initialized in getInitialStyleBits()
+     private Rectangle normalBounds = null; // not-null only for undecorated maximized windows
  
      public CPlatformWindow(final PeerType peerType) {
          super(0, true);
          assert (peerType == PeerType.SIMPLEWINDOW || peerType == PeerType.DIALOG || peerType == PeerType.FRAME);
      }
*** 279,290 ****
              styleBits = SET(styleBits, MINIMIZABLE, false);
          }
  
          // Either java.awt.Frame or java.awt.Dialog can be undecorated, however java.awt.Window always is undecorated.
          {
!             final boolean undecorated = isFrame ? ((Frame)target).isUndecorated() : (isDialog ? ((Dialog)target).isUndecorated() : true);
!             if (undecorated) styleBits = SET(styleBits, DECORATED, false);
          }
  
          // Either java.awt.Frame or java.awt.Dialog can be resizable, however java.awt.Window is never resizable
          {
              final boolean resizable = isFrame ? ((Frame)target).isResizable() : (isDialog ? ((Dialog)target).isResizable() : false);
--- 281,292 ----
              styleBits = SET(styleBits, MINIMIZABLE, false);
          }
  
          // Either java.awt.Frame or java.awt.Dialog can be undecorated, however java.awt.Window always is undecorated.
          {
!             this.undecorated = isFrame ? ((Frame)target).isUndecorated() : (isDialog ? ((Dialog)target).isUndecorated() : true);
!             if (this.undecorated) styleBits = SET(styleBits, DECORATED, false);
          }
  
          // Either java.awt.Frame or java.awt.Dialog can be resizable, however java.awt.Window is never resizable
          {
              final boolean resizable = isFrame ? ((Frame)target).isResizable() : (isDialog ? ((Dialog)target).isResizable() : false);
*** 466,475 ****
--- 468,501 ----
      public void setBounds(int x, int y, int w, int h) {
  //        assert CThreading.assertEventQueue();
          nativeSetNSWindowBounds(getNSWindowPtr(), x, y, w, h);
      }
  
+     private void zoom() {
+         if (!undecorated) {
+             CWrapper.NSWindow.zoom(getNSWindowPtr());
+         } else {
+             // OS X handles -zoom incorrectly for undecorated windows
+             final boolean isZoomed = this.normalBounds == null;
+             deliverZoom(isZoomed);
+ 
+             Rectangle toBounds;
+             if (isZoomed) {
+                 this.normalBounds = peer.getBounds();
+                 long screen = CWrapper.NSWindow.screen(getNSWindowPtr());
+                 toBounds = CWrapper.NSScreen.visibleFrame(screen).getBounds();
+                 // Flip the y coordinate
+                 Rectangle frame = CWrapper.NSScreen.frame(screen).getBounds();
+                 toBounds.y = frame.height - toBounds.y - toBounds.height;
+             } else {
+                 toBounds = normalBounds;
+                 this.normalBounds = null;
+             }
+             setBounds(toBounds.x, toBounds.y, toBounds.width, toBounds.height);
+         }
+     }
+ 
      @Override // PlatformWindow
      public void setVisible(boolean visible) {
          final long nsWindowPtr = getNSWindowPtr();
  
          if (owner != null) {
*** 486,496 ****
              switch (peer.getState()) {
                  case Frame.ICONIFIED:
                      CWrapper.NSWindow.deminiaturize(nsWindowPtr);
                      break;
                  case Frame.MAXIMIZED_BOTH:
!                     CWrapper.NSWindow.zoom(nsWindowPtr);
                      break;
              }
          }
  
          LWWindowPeer blocker = peer.getBlocker();
--- 512,522 ----
              switch (peer.getState()) {
                  case Frame.ICONIFIED:
                      CWrapper.NSWindow.deminiaturize(nsWindowPtr);
                      break;
                  case Frame.MAXIMIZED_BOTH:
!                     zoom();
                      break;
              }
          }
  
          LWWindowPeer blocker = peer.getBlocker();
*** 519,529 ****
                  switch (((Frame)target).getExtendedState()) {
                      case Frame.ICONIFIED:
                          CWrapper.NSWindow.miniaturize(nsWindowPtr);
                          break;
                      case Frame.MAXIMIZED_BOTH:
!                         CWrapper.NSWindow.zoom(nsWindowPtr);
                          break;
                  }
              }
          }
  
--- 545,555 ----
                  switch (((Frame)target).getExtendedState()) {
                      case Frame.ICONIFIED:
                          CWrapper.NSWindow.miniaturize(nsWindowPtr);
                          break;
                      case Frame.MAXIMIZED_BOTH:
!                         zoom();
                          break;
                  }
              }
          }
  
*** 680,706 ****
          switch (windowState) {
              case Frame.ICONIFIED:
                  if (prevWindowState == Frame.MAXIMIZED_BOTH) {
                      // let's return into the normal states first
                      // the zoom call toggles between the normal and the max states
!                     CWrapper.NSWindow.zoom(nsWindowPtr);
                  }
                  CWrapper.NSWindow.miniaturize(nsWindowPtr);
                  break;
              case Frame.MAXIMIZED_BOTH:
                  if (prevWindowState == Frame.ICONIFIED) {
                      // let's return into the normal states first
                      CWrapper.NSWindow.deminiaturize(nsWindowPtr);
                  }
!                 CWrapper.NSWindow.zoom(nsWindowPtr);
                  break;
              case Frame.NORMAL:
                  if (prevWindowState == Frame.ICONIFIED) {
                      CWrapper.NSWindow.deminiaturize(nsWindowPtr);
                  } else if (prevWindowState == Frame.MAXIMIZED_BOTH) {
                      // the zoom call toggles between the normal and the max states
!                     CWrapper.NSWindow.zoom(nsWindowPtr);
                  }
                  break;
              default:
                  throw new RuntimeException("Unknown window state: " + windowState);
          }
--- 706,732 ----
          switch (windowState) {
              case Frame.ICONIFIED:
                  if (prevWindowState == Frame.MAXIMIZED_BOTH) {
                      // let's return into the normal states first
                      // the zoom call toggles between the normal and the max states
!                     zoom();
                  }
                  CWrapper.NSWindow.miniaturize(nsWindowPtr);
                  break;
              case Frame.MAXIMIZED_BOTH:
                  if (prevWindowState == Frame.ICONIFIED) {
                      // let's return into the normal states first
                      CWrapper.NSWindow.deminiaturize(nsWindowPtr);
                  }
!                 zoom();
                  break;
              case Frame.NORMAL:
                  if (prevWindowState == Frame.ICONIFIED) {
                      CWrapper.NSWindow.deminiaturize(nsWindowPtr);
                  } else if (prevWindowState == Frame.MAXIMIZED_BOTH) {
                      // the zoom call toggles between the normal and the max states
!                     zoom();
                  }
                  break;
              default:
                  throw new RuntimeException("Unknown window state: " + windowState);
          }