unde/redo actions finally work

some clean up

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/util/DataBindingUtils.java

@@ -37,12 +37,9 @@ import org.eclipse.swt.widgets.Control;
  * @version $Rev$
  * @ConQAT.Rating RED Hash: 95D1650431DCD178D61C00A971F6810C
  */
-// TODO (FH): move to UI
 public final class DataBindingUtils {
 
-	/**
-	 * Decoration key for edit feedback.
-	 */
+	/** Decoration key for edit feedback. */
 	public static final String DECORATION_KEY = ControlDecoration.class
 			.getName();
 

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/util/EObjectSelectionUtils.java

@@ -20,6 +20,7 @@ package org.fortiss.tooling.kernel.ui.util;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
@@ -32,9 +33,8 @@ import org.eclipse.ui.PlatformUI;
  * @author hoelzl
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: 03051CAAB0FB1E7D6A6BA510002D2C58
+ * @ConQAT.Rating YELLOW Hash: C89BCA60DC06B35E1946C57DD21D8769
  */
-// TODO (FH): move to UI
 public final class EObjectSelectionUtils {
 
 	/**
@@ -54,7 +54,8 @@ public final class EObjectSelectionUtils {
 
 	/**
 	 * Returns the first selected EObject or <code>null</code> if no EObject is
-	 * selected.
+	 * selected. If the selection implements {@link IAdaptable}, it is asked to
+	 * adapt to {@link EObject}.
 	 */
 	public static EObject getFirstElement(ISelection selection) {
 		if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
@@ -62,6 +63,11 @@ public final class EObjectSelectionUtils {
 				return (EObject) ((IStructuredSelection) selection)
 						.getFirstElement();
 			}
+			if (((IStructuredSelection) selection).getFirstElement() instanceof IAdaptable) {
+				IAdaptable adaptable = (IAdaptable) ((IStructuredSelection) selection)
+						.getFirstElement();
+				return (EObject) adaptable.getAdapter(EObject.class);
+			}
 		}
 		return null;
 	}