Fixed Bug 375427 - IF a SpecHierarchy is dropped onto itself, nothing

should happen.
Also dropping somewhere within its child hierarchy is forbidden

1 files changed, 29 insertions, 0 deletions

diff --git a/org.eclipse.rmf.pror.reqif10.edit/src/org/eclipse/rmf/pror/reqif10/util/ProrUtil.java b/org.eclipse.rmf.pror.reqif10.edit/src/org/eclipse/rmf/pror/reqif10/util/ProrUtil.java
index 8755d558..add17017 100644
--- a/org.eclipse.rmf.pror.reqif10.edit/src/org/eclipse/rmf/pror/reqif10/util/ProrUtil.java
+++ b/org.eclipse.rmf.pror.reqif10.edit/src/org/eclipse/rmf/pror/reqif10/util/ProrUtil.java
@@ -686,4 +686,33 @@ public final class ProrUtil {
 		}

 	}

 

+	

+	/**

+	 * Helper function for drag and drop operations:

+	 * Tests if the element source may be dropped onto the target object.

+	 * 

+	 * @param source

+	 * @param target

+	 * @return true if the drop should be accepted, false otherwise

+	 */

+	public static boolean isValidDrop(SpecHierarchy source, Object target) {

+			if (source == target){

+				return false;

+			}

+			

+			if (source.getChildren().contains(target)){

+				return false;

+			}

+			

+			for (EObject child : source.getChildren()) {

+				if (child instanceof SpecHierarchy){

+					if (!isValidDrop((SpecHierarchy) child, target)){

+						return false;

+					}

+				}

+			}

+			

+			return true;

+	}

+

 }