public void Add(ISsml element)
{
var invalid = new InvalidOperationException($"Unable to add {element.GetType()}");
switch (AddStack.Peek())
{
case Paragraph paragraph:
if (!(element is IParagraphSsml))
{
throw invalid;
}
paragraph.Elements.Add((IParagraphSsml)element);
break;
case Sentence sentence:
if (!(element is ISentenceSsml))
{
throw invalid;
}
sentence.Elements.Add((ISentenceSsml)element);
break;
default:
throw invalid;
}
}
/// <summary>
/// Attempt to find a corresponding matching speech data template for the inputted ssml element.
/// If not, we use the fallback data template.
/// </summary>
/// <param name="item"></param>
/// <param name="container"></param>
/// <returns></returns>
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item is ISsml)
{
ISsml speech = item as ISsml;
if (Templates.Exists(x => speech.GetType() == (x.DataType as Type)))
{
return(Templates.Find(x => speech.GetType() == (x.DataType as Type)));
}
return(FallbackDataTemplate ?? base.SelectTemplate(item, container));
}
else
{
return(base.SelectTemplate(item, container));
}
}