Bug 219483 [Markers] MarkerField needs to support font and colours
Some users want to be able to set the font and colour of an entry in the markers view. We should pass in a ViewerCell for this.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerPriorityField.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerField#getValue(org.eclipse.ui.internal.provisional.views.markers.MarkerItem)
	 */
	public String getValue(MarkerItem item) {
		return MarkerSupportConstants.EMPTY_STRING;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerField#compare(org.eclipse.ui.internal.provisional.views.markers.api.MarkerItem,
	 *      org.eclipse.ui.internal.provisional.views.markers.api.MarkerItem)
	 */
	public int compare(MarkerItem item1, MarkerItem item2) {
		return item2.getAttributeValue(IMarker.PRIORITY,
				IMarker.PRIORITY_NORMAL)
				- item1.getAttributeValue(IMarker.PRIORITY,
						IMarker.PRIORITY_NORMAL);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerField#getEditingSupport(org.eclipse.jface.viewers.ColumnViewer)
	 */
	public EditingSupport getEditingSupport(ColumnViewer viewer) {
		return new PriorityEditingSupport(viewer);
	}
}