Bug 66923 [typing]Can delete word (Ctrl-Backspace) on read only file
When you open read-only java file, all editing functions are disabled except deleting with Ctrl-Backspace and Ctrl-Del, then it is imposible to save this file. On simple text file it works ok - it blocks all edditing functions (including Ctrl-Backspace). I am using build 200406111814
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
}
	
	/*
	 * @see AbstractTextEditor#canHandleMove(IEditorInput, IEditorInput)
	 */
	protected boolean canHandleMove(IEditorInput originalElement, IEditorInput movedElement) {
		
		String oldExtension= ""; 
		if (originalElement instanceof IFileEditorInput) {
			IFile file= ((IFileEditorInput) originalElement).getFile();
			if (file != null) {
				String ext= file.getFileExtension();
				if (ext != null)
					oldExtension= ext;
			}
		}
		
		String newExtension= ""; 
		if (movedElement instanceof IFileEditorInput) {
			IFile file= ((IFileEditorInput) movedElement).getFile();
			if (file != null)
				newExtension= file.getFileExtension();
		}
		
		return oldExtension.equals(newExtension);
	}
	/*
	 * @see org.eclipse.ui.texteditor.AbstractDecoratedTextEditor#isPrefQuickDiffAlwaysOn()
	 */
	protected boolean isPrefQuickDiffAlwaysOn() {