@Nullable
  public XmlAttribute getAttribute(String qname) {
    if (qname == null) return null;
    final XmlAttribute[] attributes = getAttributes();

    final boolean caseSensitive = isCaseSensitive();

    for (final XmlAttribute attribute : attributes) {
      final LeafElement attrNameElement =
          (LeafElement) XmlChildRole.ATTRIBUTE_NAME_FINDER.findChild(attribute.getNode());
      if (attrNameElement != null
          && (caseSensitive && Comparing.equal(attrNameElement.getChars(), qname)
              || !caseSensitive && Comparing.equal(attrNameElement.getChars(), qname, false))) {
        return attribute;
      }
    }
    return null;
  }
  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;
    }
  }
  @Nullable
  private BidirectionalMap<String, String> computeNamespaceMap(PsiElement parent) {
    BidirectionalMap<String, String> map = null;
    if (hasNamespaceDeclarations()) {
      map = new BidirectionalMap<String, String>();
      final XmlAttribute[] attributes = getAttributes();

      for (final XmlAttribute attribute : attributes) {
        if (attribute.isNamespaceDeclaration()) {
          final String name = attribute.getName();
          int splitIndex = name.indexOf(':');
          final String value = getRealNs(attribute.getValue());

          if (value != null) {
            if (splitIndex < 0) {
              map.put("", value);
            } else {
              map.put(XmlUtil.findLocalNameByQualifiedName(name), value);
            }
          }
        }
      }
    }

    if (parent instanceof XmlDocument) {
      final XmlExtension extension = XmlExtension.getExtensionByElement(parent);
      if (extension != null) {
        final String[][] defaultNamespace =
            extension.getNamespacesFromDocument((XmlDocument) parent, map != null);
        if (defaultNamespace != null) {
          if (map == null) {
            map = new BidirectionalMap<String, String>();
          }
          for (final String[] prefix2ns : defaultNamespace) {
            map.put(prefix2ns[0], getRealNs(prefix2ns[1]));
          }
        }
      }
    }
    return map;
  }
 private static void replaceElements(XmlTag tag, TemplateBuilder builder) {
   for (XmlAttribute attribute : tag.getAttributes()) {
     XmlAttributeValue value = attribute.getValueElement();
     if (value != null) {
       builder.replaceElement(value, TextRange.from(1, 0), new MacroCallNode(new CompleteMacro()));
     }
   }
   if ("<".equals(tag.getText())) {
     builder.replaceElement(
         tag, TextRange.from(1, 0), new MacroCallNode(new CompleteSmartMacro()));
   } else if (tag.getSubTags().length == 0) {
     int i = tag.getText().indexOf("></");
     if (i > 0) {
       builder.replaceElement(
           tag, TextRange.from(i + 1, 0), new MacroCallNode(new CompleteMacro()));
     }
   }
   for (XmlTag subTag : tag.getSubTags()) {
     replaceElements(subTag, builder);
   }
 }
  @NotNull
  private Map<String, CachedValue<XmlNSDescriptor>> computeNsDescriptorMap() {
    Map<String, CachedValue<XmlNSDescriptor>> map = null;
    // XSD aware attributes processing

    final String noNamespaceDeclaration =
        getAttributeValue("noNamespaceSchemaLocation", XmlUtil.XML_SCHEMA_INSTANCE_URI);
    final String schemaLocationDeclaration =
        getAttributeValue("schemaLocation", XmlUtil.XML_SCHEMA_INSTANCE_URI);

    if (noNamespaceDeclaration != null) {
      map = initializeSchema(XmlUtil.EMPTY_URI, null, noNamespaceDeclaration, map);
    }
    if (schemaLocationDeclaration != null) {
      final StringTokenizer tokenizer = new StringTokenizer(schemaLocationDeclaration);
      while (tokenizer.hasMoreTokens()) {
        final String uri = tokenizer.nextToken();
        if (tokenizer.hasMoreTokens()) {
          map = initializeSchema(uri, null, tokenizer.nextToken(), map);
        }
      }
    }
    // namespace attributes processing (XSD declaration via ExternalResourceManager)

    if (hasNamespaceDeclarations()) {
      for (final XmlAttribute attribute : getAttributes()) {
        if (attribute.isNamespaceDeclaration()) {
          String ns = attribute.getValue();
          if (ns == null) ns = XmlUtil.EMPTY_URI;
          ns = getRealNs(ns);

          if (map == null || !map.containsKey(ns)) {
            map = initializeSchema(ns, getNSVersion(ns, this), getNsLocation(ns), map);
          }
        }
      }
    }
    return map == null ? Collections.<String, CachedValue<XmlNSDescriptor>>emptyMap() : map;
  }
 @NotNull
 public Map<String, String> getLocalNamespaceDeclarations() {
   Map<String, String> namespaces = new THashMap<String, String>();
   for (final XmlAttribute attribute : getAttributes()) {
     if (!attribute.isNamespaceDeclaration() || attribute.getValue() == null) continue;
     // xmlns -> "", xmlns:a -> a
     final String localName = attribute.getLocalName();
     namespaces.put(localName.equals(attribute.getName()) ? "" : localName, attribute.getValue());
   }
   return namespaces;
 }
 @Override
 public void annotate(@NotNull final PsiElement element, @NotNull AnnotationHolder holder) {
   final PsiFile containingFile = element.getContainingFile();
   if (!JavaFxFileTypeFactory.isFxml(containingFile)) return;
   if (element instanceof XmlAttributeValue) {
     final String value = ((XmlAttributeValue) element).getValue();
     if (!JavaFxPsiUtil.isExpressionBinding(value)
         && !JavaFxPsiUtil.isIncorrectExpressionBinding(value)) {
       final PsiReference[] references = element.getReferences();
       for (PsiReference reference : references) {
         if (reference instanceof JavaFxColorReference) {
           attachColorIcon(element, holder, StringUtil.unquoteString(element.getText()));
           continue;
         }
         final PsiElement resolve = reference.resolve();
         if (resolve instanceof PsiMember) {
           if (!JavaFxPsiUtil.isVisibleInFxml((PsiMember) resolve)) {
             final String symbolPresentation =
                 "'" + SymbolPresentationUtil.getSymbolPresentableText(resolve) + "'";
             final Annotation annotation =
                 holder.createErrorAnnotation(
                     element,
                     symbolPresentation
                         + (resolve instanceof PsiClass
                             ? " should be public"
                             : " should be public or annotated with @FXML"));
             if (!(resolve instanceof PsiClass)) {
               annotation.registerUniversalFix(
                   new AddAnnotationFix(
                       JavaFxCommonNames.JAVAFX_FXML_ANNOTATION,
                       (PsiMember) resolve,
                       ArrayUtil.EMPTY_STRING_ARRAY),
                   null,
                   null);
             }
           }
         }
       }
     }
   } else if (element instanceof XmlAttribute) {
     final XmlAttribute attribute = (XmlAttribute) element;
     final String attributeName = attribute.getName();
     if (!FxmlConstants.FX_BUILT_IN_ATTRIBUTES.contains(attributeName)
         && !attribute.isNamespaceDeclaration()
         && JavaFxPsiUtil.isReadOnly(attributeName, attribute.getParent())) {
       holder.createErrorAnnotation(
           element.getNavigationElement(), "Property '" + attributeName + "' is read-only");
     }
     if (FxmlConstants.SOURCE.equals(attributeName)) {
       final XmlAttributeValue valueElement = attribute.getValueElement();
       if (valueElement != null) {
         final XmlTag xmlTag = attribute.getParent();
         if (xmlTag != null) {
           final XmlTag referencedTag = JavaFxBuiltInTagDescriptor.getReferencedTag(xmlTag);
           if (referencedTag != null) {
             if (referencedTag.getTextOffset() > xmlTag.getTextOffset()) {
               holder.createErrorAnnotation(
                   valueElement.getValueTextRange(), valueElement.getValue() + " not found");
             } else if (xmlTag.getParentTag() == referencedTag.getParentTag()) {
               final Annotation annotation =
                   holder.createErrorAnnotation(
                       valueElement.getValueTextRange(), "Duplicate child added");
               annotation.registerFix(
                   new JavaFxWrapWithDefineIntention(referencedTag, valueElement.getValue()));
             }
           }
         }
       }
     }
   } else if (element instanceof XmlTag) {
     if (FxmlConstants.FX_SCRIPT.equals(((XmlTag) element).getName())) {
       final XmlTagValue tagValue = ((XmlTag) element).getValue();
       if (!StringUtil.isEmptyOrSpaces(tagValue.getText())) {
         final List<String> langs =
             JavaFxPsiUtil.parseInjectedLanguages((XmlFile) element.getContainingFile());
         if (langs.isEmpty()) {
           final ASTNode openTag = element.getNode().findChildByType(XmlTokenType.XML_NAME);
           final Annotation annotation =
               holder.createErrorAnnotation(
                   openTag != null ? openTag.getPsi() : element, "Page language not specified.");
           annotation.registerFix(new JavaFxInjectPageLanguageIntention());
         }
       }
     }
   }
 }