How to avoid to remove the root element of a XSD file

Question

I'm trying to grey out the remove option of the root or parent element of a xsd file. It's working in its derived nodes but not in the root one.

This is working:

<xs:attribute name="user-login" type="xs:string" use="required"/>

This is not working in the parent element:

<xs:element name="MyProgram-Deploy" use="required">

Answer 1

Finally, what I did was to create a Java class inheriting from XMLNodeActionManager which is called from a inherit class of IMenuListener class. This IMenuListener is called every time that you show up the context up, so you have to override the method createContextMenu() of a inherit class of XMLTableTreeViewer to use the previous listener. In the XMLNodeActionManager class, I go over all options of the context menu and I remove the one that I don't want:

XMLTableTreeViewer.createContextMenu -> IMenuListener -> XmlNodeActionManager.contributeActions

MyTestIMenuListener:

    class MyTestNodeActionMenuListener implements IMenuListener {
    @Override
    public void menuAboutToShow(org.eclipse.jface.action.IMenuManager manager) {
        SilecsXmlNodeActionManager nodeActionManager = new MyTestXmlNodeActionManager(
                ((IDOMDocument) getInput()).getModel(), MyTestXMLTableTreeViewer.this);
        nodeActionManager.fillContextMenu(manager, getSelection());          
    }
}

MyTestXMLTableTreeViewer extend XMLTableTreeViewer:

@Override
protected void createContextMenu() {
    MenuManager contextMenu = new MenuManager("#PopUp"); //$NON-NLS-1$
    contextMenu.add(new Separator("additions")); //$NON-NLS-1$
    contextMenu.setRemoveAllWhenShown(true);
    contextMenu.addMenuListener(new MyTestNodeActionMenuListener());
    Menu menu = contextMenu.createContextMenu(getControl());
    getControl().setMenu(menu);
}

MyTestXmlNodeActionManager extend XmlNodeActionManager:

@Override
public void contributeActions(IMenuManager menu, List selection) {
    super.contributeActions(menu, selection);

    Node node = (Node) selection.iterator().next();

    IContributionItem removeMenuItem = null;
    try {
        IContributionItem[] menuItems = menu.getItems();
        for (IContributionItem menuItem: menuItems) {
            if (menuItem instanceof ActionContributionItem) {
                if (((ActionContributionItem) menuItem).getAction() instanceof AbstractNodeActionManager.DeleteAction) {
                    removeMenuItem = menu.remove(menuItem);
                    break;
                }
            }
        }
    } catch (Exception e) {

    }

}