Bug 241209 [Markers] [Problems View] Changing columns in the preferences makes errors disappear from the view
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
};
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.ui.ISelectionListener#selectionChanged(org.eclipse.ui.IWorkbenchPart,
			 *      org.eclipse.jface.viewers.ISelection)
			 */
			public void selectionChanged(IWorkbenchPart part,
					ISelection selection) {
				
				
				if (part == ExtendedMarkersView.this
						|| !(getSite().getPage().isPartVisible(part)))
					return;
				List selectedElements = new ArrayList();
				if (part instanceof IEditorPart) {
					IEditorPart editor = (IEditorPart) part;
					IFile file = ResourceUtil.getFile(editor.getEditorInput());
					if (file == null) {
						IEditorInput editorInput = editor.getEditorInput();
						if (editorInput != null) {
							Object mapping = editorInput
									.getAdapter(ResourceMapping.class);
							if (mapping != null) {
								selectedElements.add(mapping);
							}
						}
					} else {
						selectedElements.add(file);