SCxmlSpeak.js

if("speechSynthesis" in window){
if(!("http://www.jsscxml.org" in SCxml.executableContentNS))
	SCxml.executableContentNS["http://www.jsscxml.org"]={_support_:{}}

with({exc:SCxml.executableContentNS["http://www.jsscxml.org"]}){

exc._support_.speakEvent=function(de, sc){
	var e=new SCxml.ExternalEvent("speak."+de.type, de.target,
		SCxml.EventProcessors.DOM.name, null, {
			elapsedTime: de.elapsedTime,
			charIndex: de.charIndex,
			name: de.name })
	e.timeStamp=de.timeStamp
	sc.fireEvent(e)
}

exc.speak=function(sc, element)
{
	var stop=element.hasAttribute("interrupt")
		|| element.hasAttribute("nomore")

	var text=element.getAttribute("text")
		||sc.expr(element.getAttribute("expr"), element)
	if(text){
		var s=new SpeechSynthesisUtterance(text)
	
		s.lang=element.getAttributeNS("http://www.w3.org/XML/1998/namespace", "lang")
			||element.getAttribute("lang")
			||sc.expr(element.getAttribute("langexpr"), element)
			||sc.dom.documentElement.getAttributeNS(
				"http://www.w3.org/XML/1998/namespace", "lang")
			||sc.dom.documentElement.getAttribute("lang")
	
		if((s.voice=sc.expr(element.getAttribute("voice"), element))
		&& 'voiceURI' in s.voice) s.voiceURI=s.voice.voiceURI
		s.rate=+sc.expr(element.getAttribute("rate"), element) || 1
		s.pitch=+sc.expr(element.getAttribute("pitch"), element) || 1
		s.volume=+sc.expr(element.getAttribute("volume"), element) || 1
		
		s.onstart=function(e){exc._support_.speakEvent(e, sc)}
		s.onend=function(e){exc._support_.speakEvent(e, sc)}
		s.onmark=function(e){exc._support_.speakEvent(e, sc)}
		s.onboundary=function(e){exc._support_.speakEvent(e, sc)}
		s.onerror=function(e){exc._support_.speakEvent(e, sc)}
		
		if(stop) speechSynthesis.cancel()
		speechSynthesis.speak(s)
	} else if (stop) speechSynthesis.cancel()
	else sc.error("execution",element,
		new Error('cannot speak an empty string'))
}

SCxml.executableContentNS.tolerate.speak=exc.speak

}} else {
	console.warn("This browser does not implement SpeechSynthesis.")
}