expo-speech
Version:
Provides text-to-speech functionality.
81 lines • 3.11 kB
JavaScript
import { SyntheticPlatformEmitter, CodedError } from '@unimodules/core';
import { VoiceQuality } from './Speech.types';
//https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance/text
const MAX_SPEECH_INPUT_LENGTH = 32767;
export default {
get name() {
return 'ExponentSpeech';
},
async speak(id, text, options) {
if (text.length > MAX_SPEECH_INPUT_LENGTH) {
throw new CodedError('ERR_SPEECH_INPUT_LENGTH', 'Speech input text is too long! Limit of input length is: ' + MAX_SPEECH_INPUT_LENGTH);
}
const message = new SpeechSynthesisUtterance();
if (typeof options.rate === 'number') {
message.rate = options.rate;
}
if (typeof options.pitch === 'number') {
message.pitch = options.pitch;
}
if (typeof options.language === 'string') {
message.lang = options.language;
}
if (typeof options.volume === 'number') {
message.volume = options.volume;
}
if ('_voiceIndex' in options && options._voiceIndex != null) {
const voices = window.speechSynthesis.getVoices();
message.voice = voices[Math.min(voices.length - 1, Math.max(0, options._voiceIndex))];
}
if (typeof options.onResume === 'function') {
message.onresume = options.onResume;
}
if (typeof options.onMark === 'function') {
message.onmark = options.onMark;
}
if (typeof options.onBoundary === 'function') {
message.onboundary = options.onBoundary;
}
message.onstart = (nativeEvent) => {
SyntheticPlatformEmitter.emit('Exponent.speakingStarted', { id, nativeEvent });
};
message.onend = (nativeEvent) => {
SyntheticPlatformEmitter.emit('Exponent.speakingDone', { id, nativeEvent });
};
message.onpause = (nativeEvent) => {
SyntheticPlatformEmitter.emit('Exponent.speakingStopped', { id, nativeEvent });
};
message.onerror = (nativeEvent) => {
SyntheticPlatformEmitter.emit('Exponent.speakingError', { id, nativeEvent });
};
message.text = text;
window.speechSynthesis.speak(message);
return message;
},
getVoices() {
const voices = window.speechSynthesis.getVoices();
return voices.map(voice => ({
identifier: voice.voiceURI,
quality: VoiceQuality.Default,
isDefault: voice.default,
language: voice.lang,
localService: voice.localService,
name: voice.name,
voiceURI: voice.voiceURI,
}));
},
async isSpeaking() {
return window.speechSynthesis.speaking;
},
async stop() {
return window.speechSynthesis.cancel();
},
async pause() {
return window.speechSynthesis.pause();
},
async resume() {
return window.speechSynthesis.resume();
},
maxSpeechInputLength: MAX_SPEECH_INPUT_LENGTH,
};
//# sourceMappingURL=ExponentSpeech.web.js.map