Bug 46805 prepare Compare for encoding support
I20031111 The Compare plugin only supports the global workspace encoding. It does not support encodings per file.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/compare/JavaStructureCreator.java
if (fIsOut)
				return;
			
			fIsOut= true;
			
			JavaNode a= (JavaNode) diff.getAncestor();
			JavaNode y= (JavaNode) diff.getLeft();
			JavaNode m= (JavaNode) diff.getRight();
			
			if (a != null) {
				if (fAncestor != null)
					return;
				fAncestor= a;
			}
			if (y != null) {
				if (fLeft != null)
					return;
				fLeft= y;
			}
			if (m != null) {
				if (fRight != null)
					return;
				fRight= m;
			}
			
			fIsOut= false;
		}
				
		/**
		 * Returns true if some nodes could be successfully combined into one.