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package com.wordsbaking.cordova.tts;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.CordovaWebView;
import org.apache.cordova.CordovaInterface;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.speech.tts.UtteranceProgressListener;
import java.util.HashMap;
import java.util.Locale;
/*
Cordova Text-to-Speech Plugin
https://github.com/vilic/cordova-plugin-tts
by VILIC VANE
https://github.com/vilic
MIT License
*/
public class TTS extends CordovaPlugin implements OnInitListener {
public static final String ERR_INVALID_OPTIONS = "ERR_INVALID_OPTIONS";
public static final String ERR_NOT_INITIALIZED = "ERR_NOT_INITIALIZED";
public static final String ERR_ERROR_INITIALIZING = "ERR_ERROR_INITIALIZING";
public static final String ERR_UNKNOWN = "ERR_UNKNOWN";
boolean ttsInitialized = false;
TextToSpeech tts = null;
@Override
public void initialize(CordovaInterface cordova, final CordovaWebView webView) {
tts = new TextToSpeech(cordova.getActivity().getApplicationContext(), this);
tts.setOnUtteranceProgressListener(new UtteranceProgressListener() {
@Override
public void onStart(String s) {
// do nothing
}
@Override
public void onDone(String callbackId) {
if (!callbackId.equals("")) {
CallbackContext context = new CallbackContext(callbackId, webView);
context.success();
}
}
@Override
public void onError(String callbackId) {
if (!callbackId.equals("")) {
CallbackContext context = new CallbackContext(callbackId, webView);
context.error(ERR_UNKNOWN);
}
}
});
}
@Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext)
throws JSONException {
if (action.equals("speak")) {
speak(args, callbackContext);
} else {
return false;
}
return true;
}
@Override
public void onInit(int status) {
if (status != TextToSpeech.SUCCESS) {
tts = null;
} else {
// warm up the tts engine with an empty string
HashMap<String, String> ttsParams = new HashMap<String, String>();
ttsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "");
tts.setLanguage(new Locale("en", "US"));
tts.speak("", TextToSpeech.QUEUE_FLUSH, ttsParams);
ttsInitialized = true;
}
}
private void speak(JSONArray args, CallbackContext callbackContext)
throws JSONException, NullPointerException {
JSONObject params = args.getJSONObject(0);
if (params == null) {
callbackContext.error(ERR_INVALID_OPTIONS);
return;
}
String text;
String locale;
double rate;
if (params.isNull("text")) {
callbackContext.error(ERR_INVALID_OPTIONS);
return;
} else {
text = params.getString("text");
}
if (params.isNull("locale")) {
locale = "en-US";
} else {
locale = params.getString("locale");
}
if (params.isNull("rate")) {
rate = 1.0;
} else {
rate = params.getDouble("rate");
}
if (tts == null) {
callbackContext.error(ERR_ERROR_INITIALIZING);
return;
}
if (!ttsInitialized) {
callbackContext.error(ERR_NOT_INITIALIZED);
return;
}
HashMap<String, String> ttsParams = new HashMap<String, String>();
ttsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, callbackContext.getCallbackId());
String[] localeArgs = locale.split("-");
tts.setLanguage(new Locale(localeArgs[0], localeArgs[1]));
tts.setSpeechRate((float) rate);
tts.speak(text, TextToSpeech.QUEUE_FLUSH, ttsParams);
}
}