/// <summary>
/// Ensure the this element is properly placed in the SSML markup
/// </summary>
private static void ValidateElement(StackElement stackElement, SsmlElement currentElement)
{
if ((stackElement._possibleChildren & currentElement) == 0)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, SR.Get(SRID.PromptBuilderInvalidElement), currentElement.ToString(), stackElement._state.ToString()));
}
}
public void StartStyle(PromptStyle style)
{
Helpers.ThrowIfNull(style, nameof(style));
// Validate that text can be added in this context
StackElement stackElement = _elementStack.Peek();
ValidateElement(stackElement, SsmlElement.Prosody);
// For emphasis or Prosody the list of possible elements that can be children is different.
SsmlState ssmlState = 0;
SsmlElement possibleChildren = stackElement._possibleChildren;
_elements.Add(new Element(ElementType.StartStyle));
if (style.Emphasis != PromptEmphasis.NotSet)
{
Element emphasisElement = new(ElementType.Emphasis);
_elements.Add(emphasisElement);
emphasisElement._attributes = new Collection <AttributeItem>();
emphasisElement._attributes.Add(new AttributeItem("level", style.Emphasis.ToString().ToLowerInvariant()));
// Set the expected children and mark the element used
possibleChildren = SsmlElement.AudioMarkTextWithStyle;
ssmlState = SsmlState.StyleEmphasis;
}
if (style.Rate != PromptRate.NotSet || style.Volume != PromptVolume.NotSet)
{
// two elements add a second start style
if (ssmlState != 0)
{
_elements.Add(new Element(ElementType.StartStyle));
}
Element prosodyElement = new(ElementType.Prosody);
_elements.Add(prosodyElement);
if (style.Rate != PromptRate.NotSet)
{
string sPromptRate;
switch (style.Rate)
{
case PromptRate.ExtraFast:
sPromptRate = "x-fast";
break;
case PromptRate.ExtraSlow:
sPromptRate = "x-slow";
break;
default:
sPromptRate = style.Rate.ToString().ToLowerInvariant();
break;
}
prosodyElement._attributes = new Collection <AttributeItem>();
prosodyElement._attributes.Add(new AttributeItem("rate", sPromptRate));
}
if (style.Volume != PromptVolume.NotSet)
{
string sVolumeLevel;
switch (style.Volume)
{
case PromptVolume.ExtraSoft:
sVolumeLevel = "x-soft";
break;
case PromptVolume.ExtraLoud:
sVolumeLevel = "x-loud";
break;
default:
sVolumeLevel = style.Volume.ToString().ToLowerInvariant();
break;
}
if (prosodyElement._attributes == null)
{
prosodyElement._attributes = new Collection <AttributeItem>();
}
prosodyElement._attributes.Add(new AttributeItem("volume", sVolumeLevel));
}
// Set the expected children and mark the element used
possibleChildren = SsmlElement.ParagraphOrSentence | SsmlElement.AudioMarkTextWithStyle;
ssmlState |= SsmlState.StyleProsody;
}
_elementStack.Push(new StackElement(possibleChildren, ssmlState, stackElement._culture));
}
internal StackElement(SsmlElement possibleChildren, SsmlState state, CultureInfo culture)
{
_possibleChildren = possibleChildren;
_state = state;
_culture = culture;
}
public void StartStyle(PromptStyle style)
{
Helpers.ThrowIfNull(style, "style");
StackElement stackElement = _elementStack.Peek();
ValidateElement(stackElement, SsmlElement.Prosody);
SsmlState ssmlState = (SsmlState)0;
SsmlElement possibleChildren = stackElement._possibleChildren;
_elements.Add(new Element(ElementType.StartStyle));
if (style.Emphasis != 0)
{
Element element = new Element(ElementType.Emphasis);
_elements.Add(element);
element._attributes = new Collection <AttributeItem>();
element._attributes.Add(new AttributeItem("level", style.Emphasis.ToString().ToLowerInvariant()));
possibleChildren = SsmlElement.AudioMarkTextWithStyle;
ssmlState = SsmlState.StyleEmphasis;
}
if (style.Rate != 0 || style.Volume != 0)
{
if (ssmlState != 0)
{
_elements.Add(new Element(ElementType.StartStyle));
}
Element element2 = new Element(ElementType.Prosody);
_elements.Add(element2);
if (style.Rate != 0)
{
string value;
switch (style.Rate)
{
case PromptRate.ExtraFast:
value = "x-fast";
break;
case PromptRate.ExtraSlow:
value = "x-slow";
break;
default:
value = style.Rate.ToString().ToLowerInvariant();
break;
}
element2._attributes = new Collection <AttributeItem>();
element2._attributes.Add(new AttributeItem("rate", value));
}
if (style.Volume != 0)
{
string value2;
switch (style.Volume)
{
case PromptVolume.ExtraSoft:
value2 = "x-soft";
break;
case PromptVolume.ExtraLoud:
value2 = "x-loud";
break;
default:
value2 = style.Volume.ToString().ToLowerInvariant();
break;
}
if (element2._attributes == null)
{
element2._attributes = new Collection <AttributeItem>();
}
element2._attributes.Add(new AttributeItem("volume", value2));
}
possibleChildren = (SsmlElement.Voice | SsmlElement.Audio | SsmlElement.Sentence | SsmlElement.Paragraph | SsmlElement.SayAs | SsmlElement.Phoneme | SsmlElement.Sub | SsmlElement.Emphasis | SsmlElement.Break | SsmlElement.Prosody | SsmlElement.Mark | SsmlElement.Text | SsmlElement.PromptEngineOutput);
ssmlState |= SsmlState.StyleProsody;
}
_elementStack.Push(new StackElement(possibleChildren, ssmlState, stackElement._culture));
}