/// <summary>
/// Get a title for a specified svg element.
/// </summary>
private static string GetLayerTitle(SvgElement element, int maxLength = 32)
{
string elementName = element.GetName();
string layerName = null;
if (element.ID != null)
{
layerName = element.ID;
}
if (string.IsNullOrEmpty(layerName) && element.CustomAttributes != null)
{
// get custom title attributes.
foreach (var titleAttribute in AllowedTitles)
{
if (element.CustomAttributes.TryGetValue(titleAttribute, out string title))
{
if (!string.IsNullOrEmpty(title))
{
layerName = title;
break;
}
}
}
}
if (string.IsNullOrEmpty(layerName) && element.Children != null)
{
// Get child title tag
SvgTitle title = element.Children.OfType <SvgTitle>().FirstOrDefault();
if (title != null && !string.IsNullOrEmpty(title.Content))
{
layerName = title.Content;
}
}
if (string.IsNullOrEmpty(layerName))
{
// Generate more meanfull name for a svg use node. Add reference element name in a case if it's local document.
if (element is SvgUse useElement &&
useElement.ReferencedElement != null &&
!string.IsNullOrEmpty(useElement.ReferencedElement.OriginalString))
{
string str = useElement.ReferencedElement.OriginalString.Trim();
if (str.StartsWith("#"))
{
layerName = str.Substring(1);
}
}
// Generate more meanfull name for a svg text.
else if (element is SvgTextBase text && !string.IsNullOrEmpty(text.Text))
{
layerName = text.Text;
if (text.Text.Length > maxLength)
{
layerName = text.Text.Substring(0, maxLength) + "...";
}
}
