private static void fillFromSchema(PsiFile file, ElementNames names) {
    if (!(file instanceof XmlFile)) return;
    final XmlFile f = (XmlFile) file;
    final XmlDocument d = f.getDocument();
    if (d == null) return;
    final XmlTag rootTag = d.getRootTag();
    if (rootTag == null) return;

    //noinspection unchecked
    names.dependencies.add(new NSDeclTracker(rootTag));

    try {
      final Map<String, String> namespaceDeclarations = rootTag.getLocalNamespaceDeclarations();
      final Collection<String> prefixes = namespaceDeclarations.keySet();

      //noinspection unchecked
      final Set<XmlElementDescriptor> history = new THashSet<XmlElementDescriptor>();

      final XmlElementFactory ef = XmlElementFactory.getInstance(file.getProject());
      int noSchemaNamespaces = 0;
      for (String prefix : prefixes) {
        final String namespace = namespaceDeclarations.get(prefix);
        if (isIgnoredNamespace(prefix, namespace)) continue;

        final XmlTag tag =
            ef.createTagFromText("<dummy-tag xmlns='" + namespace + "' />", XMLLanguage.INSTANCE);
        final XmlDocument document = PsiTreeUtil.getParentOfType(tag, XmlDocument.class);
        final XmlNSDescriptor rootDescriptor = tag.getNSDescriptor(tag.getNamespace(), true);
        if (rootDescriptor == null
            || (rootDescriptor instanceof XmlNSDescriptorImpl
                && ((XmlNSDescriptorImpl) rootDescriptor).getTag() == null)
            || !rootDescriptor.getDeclaration().isPhysical()) {
          final QName any = QNameUtil.createAnyLocalName(namespace);
          names.elementNames.add(any);
          names.attributeNames.add(any);
          noSchemaNamespaces++;
          continue;
        }

        //noinspection unchecked
        names.dependencies.add(rootDescriptor.getDescriptorFile());

        final XmlElementDescriptor[] e = rootDescriptor.getRootElementsDescriptors(document);
        for (XmlElementDescriptor descriptor : e) {
          processElementDescriptors(descriptor, tag, names, history);
        }
      }

      names.validateNames = names.elementNames.size() > noSchemaNamespaces;

      //            final QName any = QNameUtil.createAnyLocalName("");
      //            names.elementNames.add(any);
      //            names.attributeNames.add(any);
    } catch (IncorrectOperationException e) {
      Logger.getInstance(XsltContextProvider.class.getName()).error(e);
    }
  }
 private ASTNode expandTag() throws IncorrectOperationException {
   ASTNode endTagStart = XmlChildRole.CLOSING_TAG_START_FINDER.findChild(this);
   if (endTagStart == null) {
     final XmlTagImpl tagFromText =
         (XmlTagImpl)
             XmlElementFactory.getInstance(getProject())
                 .createTagFromText("<" + getName() + "></" + getName() + ">");
     final ASTNode startTagStart = XmlChildRole.START_TAG_END_FINDER.findChild(tagFromText);
     endTagStart = XmlChildRole.CLOSING_TAG_START_FINDER.findChild(tagFromText);
     final LeafElement emptyTagEnd =
         (LeafElement) XmlChildRole.EMPTY_TAG_END_FINDER.findChild(this);
     if (emptyTagEnd != null) removeChild(emptyTagEnd);
     addChildren(startTagStart, null, null);
   }
   return endTagStart;
 }
  public XmlAttribute setAttribute(String qname, String value) throws IncorrectOperationException {
    final XmlAttribute attribute = getAttribute(qname);

    if (attribute != null) {
      if (value == null) {
        deleteChildInternal(attribute.getNode());
        return null;
      }
      attribute.setValue(value);
      return attribute;
    } else if (value == null) {
      return null;
    } else {
      PsiElement xmlAttribute =
          add(XmlElementFactory.getInstance(getProject()).createXmlAttribute(qname, value));
      while (!(xmlAttribute instanceof XmlAttribute)) xmlAttribute = xmlAttribute.getNextSibling();
      return (XmlAttribute) xmlAttribute;
    }
  }
 @Override
 public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element)
     throws IncorrectOperationException {
   if (!FileModificationService.getInstance().preparePsiElementsForWrite(element)) return;
   final XmlAttribute attr = (XmlAttribute) element.getParent();
   final String name = attr.getName();
   final XmlAttributeDescriptor descriptor = attr.getDescriptor();
   LOG.assertTrue(descriptor != null);
   String value = attr.getValue();
   final PsiElement declaration = descriptor.getDeclaration();
   if (declaration instanceof PsiField) {
     final PsiType fieldType = ((PsiField) declaration).getType();
     final PsiType itemType =
         JavaGenericsUtil.getCollectionItemType(fieldType, declaration.getResolveScope());
     if (itemType != null) {
       final String typeNode = itemType.getPresentableText();
       JavaFxPsiUtil.insertImportWhenNeeded(
           (XmlFile) attr.getContainingFile(), typeNode, itemType.getCanonicalText());
       final String[] vals = value.split(",");
       value =
           StringUtil.join(
               vals,
               new Function<String, String>() {
                 @Override
                 public String fun(String s) {
                   return "<"
                       + typeNode
                       + " "
                       + FxmlConstants.FX_VALUE
                       + "=\""
                       + s.trim()
                       + "\"/>";
                 }
               },
               "\n");
     }
   }
   final XmlTag childTag =
       XmlElementFactory.getInstance(project)
           .createTagFromText("<" + name + ">" + value + "</" + name + ">");
   attr.getParent().add(childTag);
   attr.delete();
 }