void SpeechSynthesis::speak(SpeechSynthesisUtterance* utterance, ExceptionState& exceptionState)
{
if (!utterance) {
exceptionState.throwTypeError("Invalid utterance argument");
return;
}
m_utteranceQueue.append(utterance);
// If the queue was empty, speak this immediately.
if (m_utteranceQueue.size() == 1)
startSpeakingImmediately();
}
void SpeechSynthesis::speak(SpeechSynthesisUtterance* utterance)
{
if (!utterance)
return;
// Like Audio, we should require that the user interact to start a speech synthesis session.
#if PLATFORM(IOS)
if (ScriptController::processingUserGesture())
removeBehaviorRestriction(RequireUserGestureForSpeechStartRestriction);
else if (userGestureRequiredForSpeechStart())
return;
#endif
m_utteranceQueue.append(utterance);
// If the queue was empty, speak this immediately and add it to the queue.
if (m_utteranceQueue.size() == 1)
startSpeakingImmediately(utterance);
}
void SpeechSynthesis::handleSpeakingCompleted(SpeechSynthesisUtterance* utterance, bool errorOccurred)
{
ASSERT(utterance);
ASSERT(m_currentSpeechUtterance);
m_currentSpeechUtterance = 0;
fireEvent(errorOccurred ? eventNames().errorEvent : eventNames().endEvent, utterance, 0, String());
if (m_utteranceQueue.size()) {
RefPtr<SpeechSynthesisUtterance> firstUtterance = m_utteranceQueue.first();
ASSERT(firstUtterance == utterance);
if (firstUtterance == utterance)
m_utteranceQueue.removeFirst();
// Start the next job if there is one pending.
if (!m_utteranceQueue.isEmpty())
startSpeakingImmediately(m_utteranceQueue.first().get());
}
}
void SpeechSynthesis::handleSpeakingCompleted(SpeechSynthesisUtterance* utterance, bool errorOccurred)
{
ASSERT(utterance);
bool shouldStartSpeaking = false;
// If the utterance that completed was the one we're currently speaking,
// remove it from the queue and start speaking the next one.
if (utterance == currentSpeechUtterance()) {
m_utteranceQueue.removeFirst();
shouldStartSpeaking = !!m_utteranceQueue.size();
}
// Always fire the event, because the platform may have asynchronously
// sent an event on an utterance before it got the message that we
// canceled it, and we should always report to the user what actually
// happened.
fireEvent(errorOccurred ? EventTypeNames::error : EventTypeNames::end, utterance, 0, String());
// Start the next utterance if we just finished one and one was pending.
if (shouldStartSpeaking && !m_utteranceQueue.isEmpty())
startSpeakingImmediately();
}
