Merge change 5711 into donut

* changes:
  Adding in TTS service support for language query and level of support.

core/java/android/speech/tts/ITts.aidl

@@ -43,6 +43,10 @@ interface ITts {
 
     void addSpeechFile(in String text, in String filename);
 
+    String[] getLanguage();
+
+    int isLanguageAvailable(in String language, in String country, in String variant);
+
     void setLanguage(in String language, in String country, in String variant);
 
     boolean synthesizeToFile(in String text, in String[] params, in String outputDirectory);

core/java/android/speech/tts/TextToSpeech.java

@@ -657,18 +657,56 @@ public class TextToSpeech {
 
 
     /**
-     * Checks if the specified language as represented by the locale is available.
+     * Returns a Locale instance describing the language currently being used by the TTS engine.
+     * @return language, country (if any) and variant (if any) used by the engine stored in a Locale
+     *     instance, or null is the TTS engine has failed.
+     */
+    public Locale getLanguage() {
+        synchronized (mStartLock) {
+            if (!mStarted) {
+                return null;
+            }
+            try {
+                String[] locStrings =  mITts.getLanguage();
+                if (locStrings.length == 3) {
+                    return new Locale(locStrings[0], locStrings[1], locStrings[2]);
+                } else {
+                    return null;
+                }
+            } catch (RemoteException e) {
+                // TTS died; restart it.
+                mStarted = false;
+                initTts();
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Checks if the specified language as represented by the Locale is available.
      *
      * @param loc
-     *            The locale describing the language to be used.
+     *            The Locale describing the language to be used.
      *
      * @return one of TTS_LANG_NOT_SUPPORTED, TTS_LANG_MISSING_DATA, TTS_LANG_AVAILABLE,
      *         TTS_LANG_COUNTRY_AVAILABLE, TTS_LANG_COUNTRY_VAR_AVAILABLE.
      */
     public int isLanguageAvailable(Locale loc) {
-        //TODO: Implement isLanguageAvailable
+        synchronized (mStartLock) {
+            if (!mStarted) {
                 return TTS_LANG_NOT_SUPPORTED;
             }
+            try {
+                return mITts.isLanguageAvailable(loc.getISO3Language(), loc.getISO3Country(),
+                        loc.getVariant());
+            } catch (RemoteException e) {
+                // TTS died; restart it.
+                mStarted = false;
+                initTts();
+            }
+            return TTS_LANG_NOT_SUPPORTED;
+        }
+    }
 
 
     /**

packages/TtsService/src/android/tts/TtsService.java

@@ -148,8 +148,7 @@ public class TtsService extends Service implements OnCompletionListener {
 
 
     private void setDefaultSettings() {
-        // TODO handle default language
+        setLanguage(this.getDefaultLanguage(), getDefaultLanguage(), getDefaultLocVariant());
-        setLanguage("eng", "USA", "");
 
         // speech rate
         setSpeechRate(getDefaultRate());
@@ -218,6 +217,17 @@ public class TtsService extends Service implements OnCompletionListener {
     }
 
 
+    private int isLanguageAvailable(String lang, String country, String variant) {
+        Log.v("TTS", "TtsService.isLanguageAvailable(" + lang + ", " + country + ", " +variant+")");
+        return nativeSynth.isLanguageAvailable(lang, country, variant);
+    }
+
+
+    private String[] getLanguage() {
+        return nativeSynth.getLanguage();
+    }
+
+
     private void setLanguage(String lang, String country, String variant) {
         Log.v("TTS", "TtsService.setLanguage(" + lang + ", " + country + ", " + variant + ")");
         if (isDefaultEnforced()) {
@@ -892,6 +902,30 @@ public class TtsService extends Service implements OnCompletionListener {
             mSelf.setPitch(pitch);
         }
 
+        /**
+         * Returns the level of support for the specified language.
+         *
+         * @param lang  the three letter ISO language code.
+         * @param country  the three letter ISO country code.
+         * @param variant  the variant code associated with the country and language pair.
+         * @return one of TTS_LANG_NOT_SUPPORTED, TTS_LANG_MISSING_DATA, TTS_LANG_AVAILABLE,
+         *      TTS_LANG_COUNTRY_AVAILABLE, TTS_LANG_COUNTRY_VAR_AVAILABLE as defined in
+         *      android.speech.tts.TextToSpeech.
+         */
+        public int isLanguageAvailable(String lang, String country, String variant) {
+            return mSelf.isLanguageAvailable(lang, country, variant);
+        }
+
+        /**
+         * Returns the currently set language / country / variant strings representing the
+         * language used by the TTS engine.
+         * @return null is no language is set, or an array of 3 string containing respectively
+         *      the language, country and variant.
+         */
+        public String[] getLanguage() {
+            return mSelf.getLanguage();
+        }
+
         /**
          * Sets the speech rate for the TTS, which affects the synthesized voice.
          *