@Override
  public void invoke(final @NotNull Project project,
                     @NotNull PsiFile file,
                     final @Nullable Editor editor,
                     @NotNull PsiElement startElement,
                     @NotNull PsiElement endElement) {
    XmlTag myTag = (XmlTag)startElement;
    ASTNode treeElement = SourceTreeToPsiMap.psiElementToTree(myTag);

    final XmlElementDescriptor descriptor = myTag.getDescriptor();
    if (descriptor == null) {
      return;
    }
    final XmlAttributeDescriptor attrDescriptor = descriptor.getAttributeDescriptor(myAttrName, myTag);
    final boolean indirectSyntax = XmlExtension.getExtension(myTag.getContainingFile()).isIndirectSyntax(attrDescriptor);
    boolean insertShorthand = myTag instanceof HtmlTag && attrDescriptor != null && HtmlUtil.isBooleanAttribute(attrDescriptor, myTag);

    PsiElement anchor = SourceTreeToPsiMap.treeElementToPsi(
      XmlChildRole.EMPTY_TAG_END_FINDER.findChild(treeElement)
    );

    final boolean anchorIsEmptyTag = anchor != null;

    if (anchor == null) {
      anchor = SourceTreeToPsiMap.treeElementToPsi(
        XmlChildRole.START_TAG_END_FINDER.findChild(treeElement)
      );
    }

    if (anchor == null) return;

    final Template template = TemplateManager.getInstance(project).createTemplate("", "");
    String valuePostfix = "\"";
    if (indirectSyntax) {
      if (anchorIsEmptyTag) template.addTextSegment(">");
      template.addTextSegment("<jsp:attribute name=\"" + myAttrName + "\">");
    }
    else {
      template.addTextSegment(" " + myAttrName);
      if (!insertShorthand) {
        String quote = XmlEditUtil.getAttributeQuote(file);
        AttributeValuePresentation presentation = XmlExtension.getExtension(file).getAttributeValuePresentation(myTag, myAttrName, quote);

        valuePostfix = presentation.getPostfix();
        template.addTextSegment("=" + presentation.getPrefix());
      }
    }

    Expression expression = new ConstantNode("").withLookupStrings(myValues);
    if (!insertShorthand) template.addVariable(NAME_TEMPLATE_VARIABLE, expression, expression, true);

    if (indirectSyntax) {
      template.addTextSegment("</jsp:attribute>");
      template.addEndVariable();
      if (anchorIsEmptyTag) template.addTextSegment("</" + myTag.getName() + ">");
    }
    else if (!insertShorthand) {
      template.addTextSegment(valuePostfix);
    }
    
    int textOffset = anchor.getTextOffset();
    if (!anchorIsEmptyTag && indirectSyntax) ++textOffset;
    editor.getCaretModel().moveToOffset(textOffset);
    if (anchorIsEmptyTag && indirectSyntax) {
      editor.getDocument().deleteString(textOffset, textOffset + 2);
    }
    TemplateManager.getInstance(project).startTemplate(editor, template);
  }
@Override
  public void invoke(final @NotNull Project project,
                     @NotNull PsiFile file,
                     final @Nullable Editor editor,
                     @NotNull PsiElement startElement,
                     @NotNull PsiElement endElement)