Support Mac OS X 10.6+ keyboard setting "Full Keyboard Access" in sheets emulation.

platform/platform-api/src/com/intellij/openapi/ui/Messages.java

@@ -32,6 +32,7 @@ import com.intellij.openapi.wm.WindowManager;
 import com.intellij.ui.*;
 import com.intellij.ui.components.JBScrollPane;
 import com.intellij.ui.mac.MacMessages;
+import com.intellij.ui.mac.foundation.MacUtil;
 import com.intellij.util.Alarm;
 import com.intellij.util.Function;
 import com.intellij.util.PairFunction;
@@ -45,9 +46,7 @@ import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.text.JTextComponent;
 import javax.swing.text.html.HTMLEditorKit;
 import java.awt.*;
-import java.awt.event.ActionEvent;
-import java.awt.event.ItemEvent;
-import java.awt.event.ItemListener;
+import java.awt.event.*;
 import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.List;
@@ -1025,6 +1024,7 @@ public class Messages {
       setButtonsAlignment(SwingConstants.CENTER);
       setDoNotAskOption(doNotAskOption);
       init();
+      MacUtil.adjustFocusTraversal(myDisposable);
     }
 
     @NotNull

platform/util/src/com/intellij/ui/mac/foundation/MacUtil.java

@@ -15,11 +15,18 @@
  */
 package com.intellij.ui.mac.foundation;
 
+import com.intellij.openapi.Disposable;
 import com.intellij.openapi.util.Comparing;
+import com.intellij.openapi.util.Disposer;
+import com.intellij.openapi.util.SystemInfo;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import javax.swing.*;
+import javax.swing.text.JTextComponent;
 import java.awt.*;
+import java.awt.event.AWTEventListener;
+import java.awt.event.KeyEvent;
 
 import static com.intellij.ui.mac.foundation.Foundation.invoke;
 import static com.intellij.ui.mac.foundation.Foundation.toStringViaUTF8;
@@ -103,6 +110,31 @@ public class MacUtil {
   public static synchronized void startModal(JComponent component) {
     startModal(component, MAC_NATIVE_WINDOW_SHOWING);
   }
-  
-  
+
+  public static boolean isFullKeyboardAccessEnabled() {
+    return SystemInfo.isMacOSSnowLeopard
+           && invoke(invoke("NSApplication", "sharedApplication"), "isFullKeyboardAccessEnabled").intValue() == 1;
+  }
+
+  public static void adjustFocusTraversal(@NotNull Disposable disposable) {
+    if (!SystemInfo.isMacOSSnowLeopard) return;
+    final AWTEventListener listener = new AWTEventListener() {
+      @Override
+      public void eventDispatched(AWTEvent event) {
+        if (event instanceof KeyEvent
+            && ((KeyEvent)event).getKeyCode() == KeyEvent.VK_TAB
+            && (!(event.getSource() instanceof JTextComponent))
+            && (!(event.getSource() instanceof JList))
+            && !isFullKeyboardAccessEnabled())
+          ((KeyEvent)event).consume();
+      }
+    };
+    Disposer.register(disposable, new Disposable() {
+      @Override
+      public void dispose() {
+        Toolkit.getDefaultToolkit().removeAWTEventListener(listener);
+      }
+    });
+    Toolkit.getDefaultToolkit().addAWTEventListener(listener, AWTEvent.KEY_EVENT_MASK);
+  }
 }