/// <summary>
/// Adds a <c>bodyPr</c> node (Body Properties) to the node of type <c>txPr</c> (Text properties) specified. Not supported in <c>EPPlus</c> library.
/// </summary>
/// <param name="textPropertiesNode"><c>txPr</c> node (Text properties).</param>
/// <param name="orientation">A <see cref="KnownLabelOrientation" /> value from model.</param>
/// <param name="documentHelper">Target xml document helper.</param>
/// <remarks>
/// For more information please see <a href="http://www.schemacentral.com/sc/ooxml/e-a_bodyPr-2.html">http://www.schemacentral.com/sc/ooxml/e-a_bodyPr-2.html</a>
/// </remarks>
private static void AddBodyPropertiesNode(this XmlNode textPropertiesNode, LabelOrientation orientation, IXmlHelper documentHelper)
{
var rotAttr = documentHelper.CreateAttribute("rot");
rotAttr.Value = orientation.ToAngle().ToString(CultureInfo.InvariantCulture);
var vertAttr = documentHelper.CreateAttribute("vert");
vertAttr.Value = orientation == LabelOrientation.Vertical ? "wordArtVert" : "horz";
var bodyPropertiesNode = documentHelper.CreateOrDefaultAndAppendElementToNode(textPropertiesNode, "a", "bodyPr");
bodyPropertiesNode.Attributes.Append(rotAttr);
bodyPropertiesNode.Attributes.Append(vertAttr);
}
