Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| 5 | * use this file except in compliance with the License. You may obtain a copy of |
| 6 | * the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 12 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 13 | * License for the specific language governing permissions and limitations under |
| 14 | * the License. |
| 15 | */ |
| 16 | package android.speech.tts; |
| 17 | |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 18 | import org.xmlpull.v1.XmlPullParserException; |
| 19 | |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 20 | import android.content.ContentResolver; |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 21 | import android.content.Context; |
| 22 | import android.content.Intent; |
| 23 | import android.content.pm.ApplicationInfo; |
| 24 | import android.content.pm.PackageManager; |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 25 | import android.content.pm.PackageManager.NameNotFoundException; |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 26 | import android.content.pm.ResolveInfo; |
| 27 | import android.content.pm.ServiceInfo; |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 28 | import android.content.res.Resources; |
| 29 | import android.content.res.TypedArray; |
| 30 | import android.content.res.XmlResourceParser; |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 31 | import static android.provider.Settings.Secure.getString; |
| 32 | |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 33 | import android.provider.Settings; |
| 34 | import android.speech.tts.TextToSpeech.Engine; |
| 35 | import android.speech.tts.TextToSpeech.EngineInfo; |
| 36 | import android.text.TextUtils; |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 37 | import android.util.AttributeSet; |
| 38 | import android.util.Log; |
| 39 | import android.util.Xml; |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 40 | |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 41 | import java.io.IOException; |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 42 | import java.util.ArrayList; |
| 43 | import java.util.Collections; |
| 44 | import java.util.Comparator; |
| 45 | import java.util.List; |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 46 | import java.util.Locale; |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 47 | |
| 48 | /** |
| 49 | * Support class for querying the list of available engines |
| 50 | * on the device and deciding which one to use etc. |
| 51 | * |
| 52 | * Comments in this class the use the shorthand "system engines" for engines that |
| 53 | * are a part of the system image. |
| 54 | * |
| 55 | * @hide |
| 56 | */ |
| 57 | public class TtsEngines { |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 58 | private static final String TAG = "TtsEngines"; |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 59 | private static final boolean DBG = false; |
| 60 | |
| 61 | private static final String LOCALE_DELIMITER = "-"; |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 62 | |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 63 | private final Context mContext; |
| 64 | |
| 65 | public TtsEngines(Context ctx) { |
| 66 | mContext = ctx; |
| 67 | } |
| 68 | |
| 69 | /** |
Narayan Kamath | 0e20fe5 | 2011-06-14 12:39:55 +0100 | [diff] [blame] | 70 | * @return the default TTS engine. If the user has set a default, and the engine |
| 71 | * is available on the device, the default is returned. Otherwise, |
| 72 | * the highest ranked engine is returned as per {@link EngineInfoComparator}. |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 73 | */ |
| 74 | public String getDefaultEngine() { |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 75 | String engine = getString(mContext.getContentResolver(), |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 76 | Settings.Secure.TTS_DEFAULT_SYNTH); |
Narayan Kamath | 0e20fe5 | 2011-06-14 12:39:55 +0100 | [diff] [blame] | 77 | return isEngineInstalled(engine) ? engine : getHighestRankedEngineName(); |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | /** |
| 81 | * @return the package name of the highest ranked system engine, {@code null} |
| 82 | * if no TTS engines were present in the system image. |
| 83 | */ |
| 84 | public String getHighestRankedEngineName() { |
| 85 | final List<EngineInfo> engines = getEngines(); |
| 86 | |
| 87 | if (engines.size() > 0 && engines.get(0).system) { |
| 88 | return engines.get(0).name; |
| 89 | } |
| 90 | |
| 91 | return null; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Returns the engine info for a given engine name. Note that engines are |
| 96 | * identified by their package name. |
| 97 | */ |
| 98 | public EngineInfo getEngineInfo(String packageName) { |
| 99 | PackageManager pm = mContext.getPackageManager(); |
| 100 | Intent intent = new Intent(Engine.INTENT_ACTION_TTS_SERVICE); |
| 101 | intent.setPackage(packageName); |
| 102 | List<ResolveInfo> resolveInfos = pm.queryIntentServices(intent, |
| 103 | PackageManager.MATCH_DEFAULT_ONLY); |
| 104 | // Note that the current API allows only one engine per |
| 105 | // package name. Since the "engine name" is the same as |
| 106 | // the package name. |
| 107 | if (resolveInfos != null && resolveInfos.size() == 1) { |
| 108 | return getEngineInfo(resolveInfos.get(0), pm); |
| 109 | } |
| 110 | |
| 111 | return null; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Gets a list of all installed TTS engines. |
| 116 | * |
| 117 | * @return A list of engine info objects. The list can be empty, but never {@code null}. |
| 118 | */ |
| 119 | public List<EngineInfo> getEngines() { |
| 120 | PackageManager pm = mContext.getPackageManager(); |
| 121 | Intent intent = new Intent(Engine.INTENT_ACTION_TTS_SERVICE); |
| 122 | List<ResolveInfo> resolveInfos = |
| 123 | pm.queryIntentServices(intent, PackageManager.MATCH_DEFAULT_ONLY); |
| 124 | if (resolveInfos == null) return Collections.emptyList(); |
| 125 | |
| 126 | List<EngineInfo> engines = new ArrayList<EngineInfo>(resolveInfos.size()); |
| 127 | |
| 128 | for (ResolveInfo resolveInfo : resolveInfos) { |
| 129 | EngineInfo engine = getEngineInfo(resolveInfo, pm); |
| 130 | if (engine != null) { |
| 131 | engines.add(engine); |
| 132 | } |
| 133 | } |
| 134 | Collections.sort(engines, EngineInfoComparator.INSTANCE); |
| 135 | |
| 136 | return engines; |
| 137 | } |
| 138 | |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 139 | private boolean isSystemEngine(ServiceInfo info) { |
| 140 | final ApplicationInfo appInfo = info.applicationInfo; |
| 141 | return appInfo != null && (appInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0; |
| 142 | } |
| 143 | |
Narayan Kamath | 0e20fe5 | 2011-06-14 12:39:55 +0100 | [diff] [blame] | 144 | /** |
Narayan Kamath | c3edf2a | 2011-06-15 12:35:06 +0100 | [diff] [blame] | 145 | * @return true if a given engine is installed on the system. |
Narayan Kamath | 0e20fe5 | 2011-06-14 12:39:55 +0100 | [diff] [blame] | 146 | */ |
Narayan Kamath | c3edf2a | 2011-06-15 12:35:06 +0100 | [diff] [blame] | 147 | public boolean isEngineInstalled(String engine) { |
Narayan Kamath | 0e20fe5 | 2011-06-14 12:39:55 +0100 | [diff] [blame] | 148 | if (engine == null) { |
| 149 | return false; |
| 150 | } |
| 151 | |
Narayan Kamath | c3edf2a | 2011-06-15 12:35:06 +0100 | [diff] [blame] | 152 | return getEngineInfo(engine) != null; |
Narayan Kamath | 0e20fe5 | 2011-06-14 12:39:55 +0100 | [diff] [blame] | 153 | } |
| 154 | |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 155 | /** |
| 156 | * @return an intent that can launch the settings activity for a given tts engine. |
| 157 | */ |
| 158 | public Intent getSettingsIntent(String engine) { |
| 159 | PackageManager pm = mContext.getPackageManager(); |
| 160 | Intent intent = new Intent(Engine.INTENT_ACTION_TTS_SERVICE); |
| 161 | intent.setPackage(engine); |
| 162 | List<ResolveInfo> resolveInfos = pm.queryIntentServices(intent, |
| 163 | PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA); |
| 164 | // Note that the current API allows only one engine per |
| 165 | // package name. Since the "engine name" is the same as |
| 166 | // the package name. |
| 167 | if (resolveInfos != null && resolveInfos.size() == 1) { |
| 168 | ServiceInfo service = resolveInfos.get(0).serviceInfo; |
| 169 | if (service != null) { |
| 170 | final String settings = settingsActivityFromServiceInfo(service, pm); |
| 171 | if (settings != null) { |
| 172 | Intent i = new Intent(); |
| 173 | i.setClassName(engine, settings); |
| 174 | return i; |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | return null; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * The name of the XML tag that text to speech engines must use to |
| 184 | * declare their meta data. |
| 185 | * |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 186 | * {@link com.android.internal.R.styleable#TextToSpeechEngine} |
Narayan Kamath | 4d03462 | 2011-06-16 12:43:46 +0100 | [diff] [blame] | 187 | */ |
| 188 | private static final String XML_TAG_NAME = "tts-engine"; |
| 189 | |
| 190 | private String settingsActivityFromServiceInfo(ServiceInfo si, PackageManager pm) { |
| 191 | XmlResourceParser parser = null; |
| 192 | try { |
| 193 | parser = si.loadXmlMetaData(pm, TextToSpeech.Engine.SERVICE_META_DATA); |
| 194 | if (parser == null) { |
| 195 | Log.w(TAG, "No meta-data found for :" + si); |
| 196 | return null; |
| 197 | } |
| 198 | |
| 199 | final Resources res = pm.getResourcesForApplication(si.applicationInfo); |
| 200 | |
| 201 | int type; |
| 202 | while ((type = parser.next()) != XmlResourceParser.END_DOCUMENT) { |
| 203 | if (type == XmlResourceParser.START_TAG) { |
| 204 | if (!XML_TAG_NAME.equals(parser.getName())) { |
| 205 | Log.w(TAG, "Package " + si + " uses unknown tag :" |
| 206 | + parser.getName()); |
| 207 | return null; |
| 208 | } |
| 209 | |
| 210 | final AttributeSet attrs = Xml.asAttributeSet(parser); |
| 211 | final TypedArray array = res.obtainAttributes(attrs, |
| 212 | com.android.internal.R.styleable.TextToSpeechEngine); |
| 213 | final String settings = array.getString( |
| 214 | com.android.internal.R.styleable.TextToSpeechEngine_settingsActivity); |
| 215 | array.recycle(); |
| 216 | |
| 217 | return settings; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | return null; |
| 222 | } catch (NameNotFoundException e) { |
| 223 | Log.w(TAG, "Could not load resources for : " + si); |
| 224 | return null; |
| 225 | } catch (XmlPullParserException e) { |
| 226 | Log.w(TAG, "Error parsing metadata for " + si + ":" + e); |
| 227 | return null; |
| 228 | } catch (IOException e) { |
| 229 | Log.w(TAG, "Error parsing metadata for " + si + ":" + e); |
| 230 | return null; |
| 231 | } finally { |
| 232 | if (parser != null) { |
| 233 | parser.close(); |
| 234 | } |
| 235 | } |
| 236 | } |
| 237 | |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 238 | private EngineInfo getEngineInfo(ResolveInfo resolve, PackageManager pm) { |
| 239 | ServiceInfo service = resolve.serviceInfo; |
| 240 | if (service != null) { |
| 241 | EngineInfo engine = new EngineInfo(); |
| 242 | // Using just the package name isn't great, since it disallows having |
| 243 | // multiple engines in the same package, but that's what the existing API does. |
| 244 | engine.name = service.packageName; |
| 245 | CharSequence label = service.loadLabel(pm); |
| 246 | engine.label = TextUtils.isEmpty(label) ? engine.name : label.toString(); |
| 247 | engine.icon = service.getIconResource(); |
| 248 | engine.priority = resolve.priority; |
| 249 | engine.system = isSystemEngine(service); |
| 250 | return engine; |
| 251 | } |
| 252 | |
| 253 | return null; |
| 254 | } |
| 255 | |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 256 | private static class EngineInfoComparator implements Comparator<EngineInfo> { |
| 257 | private EngineInfoComparator() { } |
| 258 | |
| 259 | static EngineInfoComparator INSTANCE = new EngineInfoComparator(); |
| 260 | |
| 261 | /** |
| 262 | * Engines that are a part of the system image are always lesser |
| 263 | * than those that are not. Within system engines / non system engines |
| 264 | * the engines are sorted in order of their declared priority. |
| 265 | */ |
| 266 | @Override |
| 267 | public int compare(EngineInfo lhs, EngineInfo rhs) { |
| 268 | if (lhs.system && !rhs.system) { |
| 269 | return -1; |
| 270 | } else if (rhs.system && !lhs.system) { |
| 271 | return 1; |
| 272 | } else { |
| 273 | // Either both system engines, or both non system |
| 274 | // engines. |
| 275 | // |
| 276 | // Note, this isn't a typo. Higher priority numbers imply |
| 277 | // higher priority, but are "lower" in the sort order. |
| 278 | return rhs.priority - lhs.priority; |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 283 | /** |
| 284 | * Returns the locale string for a given TTS engine. Attempts to read the |
| 285 | * value from {@link Settings.Secure#TTS_DEFAULT_LOCALE}, failing which the |
| 286 | * old style value from {@link Settings.Secure#TTS_DEFAULT_LANG} is read. If |
| 287 | * both these values are empty, the default phone locale is returned. |
| 288 | * |
| 289 | * @param engineName the engine to return the locale for. |
| 290 | * @return the locale string preference for this engine. Will be non null |
| 291 | * and non empty. |
| 292 | */ |
| 293 | public String getLocalePrefForEngine(String engineName) { |
| 294 | String locale = parseEnginePrefFromList( |
| 295 | getString(mContext.getContentResolver(), Settings.Secure.TTS_DEFAULT_LOCALE), |
| 296 | engineName); |
| 297 | |
| 298 | if (TextUtils.isEmpty(locale)) { |
| 299 | // The new style setting is unset, attempt to return the old style setting. |
| 300 | locale = getV1Locale(); |
| 301 | } |
| 302 | |
| 303 | if (DBG) Log.d(TAG, "getLocalePrefForEngine(" + engineName + ")= " + locale); |
| 304 | |
| 305 | return locale; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Parses a locale preference value delimited by {@link #LOCALE_DELIMITER}. |
| 310 | * Varies from {@link String#split} in that it will always return an array |
| 311 | * of length 3 with non null values. |
| 312 | */ |
| 313 | public static String[] parseLocalePref(String pref) { |
| 314 | String[] returnVal = new String[] { "", "", ""}; |
| 315 | if (!TextUtils.isEmpty(pref)) { |
| 316 | String[] split = pref.split(LOCALE_DELIMITER); |
| 317 | System.arraycopy(split, 0, returnVal, 0, split.length); |
| 318 | } |
| 319 | |
| 320 | if (DBG) Log.d(TAG, "parseLocalePref(" + returnVal[0] + "," + returnVal[1] + |
| 321 | "," + returnVal[2] +")"); |
| 322 | |
| 323 | return returnVal; |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * @return the old style locale string constructed from |
| 328 | * {@link Settings.Secure#TTS_DEFAULT_LANG}, |
| 329 | * {@link Settings.Secure#TTS_DEFAULT_COUNTRY} and |
| 330 | * {@link Settings.Secure#TTS_DEFAULT_VARIANT}. If no such locale is set, |
| 331 | * then return the default phone locale. |
| 332 | */ |
| 333 | private String getV1Locale() { |
| 334 | final ContentResolver cr = mContext.getContentResolver(); |
| 335 | |
| 336 | final String lang = Settings.Secure.getString(cr, Settings.Secure.TTS_DEFAULT_LANG); |
| 337 | final String country = Settings.Secure.getString(cr, Settings.Secure.TTS_DEFAULT_COUNTRY); |
| 338 | final String variant = Settings.Secure.getString(cr, Settings.Secure.TTS_DEFAULT_VARIANT); |
| 339 | |
| 340 | if (TextUtils.isEmpty(lang)) { |
| 341 | return getDefaultLocale(); |
| 342 | } |
| 343 | |
| 344 | String v1Locale = lang; |
| 345 | if (!TextUtils.isEmpty(country)) { |
| 346 | v1Locale += LOCALE_DELIMITER + country; |
Narayan Kamath | 39268ff | 2011-10-17 14:37:40 +0100 | [diff] [blame] | 347 | } else { |
| 348 | return v1Locale; |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 349 | } |
Narayan Kamath | 39268ff | 2011-10-17 14:37:40 +0100 | [diff] [blame] | 350 | |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 351 | if (!TextUtils.isEmpty(variant)) { |
| 352 | v1Locale += LOCALE_DELIMITER + variant; |
| 353 | } |
| 354 | |
| 355 | return v1Locale; |
| 356 | } |
| 357 | |
Przemyslaw Szczepaniak | 40d51e7 | 2013-05-13 17:15:53 +0100 | [diff] [blame] | 358 | /** |
| 359 | * Return the default device locale in form of 3 letter codes delimited by |
| 360 | * {@link #LOCALE_DELIMITER}: |
| 361 | * <ul> |
| 362 | * <li> "ISO 639-2/T language code" if locale have no country entry</li> |
| 363 | * <li> "ISO 639-2/T language code{@link #LOCALE_DELIMITER}ISO 3166 country code " |
| 364 | * if locale have no variant entry</li> |
| 365 | * <li> "ISO 639-2/T language code{@link #LOCALE_DELIMITER}ISO 3166 country code |
| 366 | * {@link #LOCALE_DELIMITER} variant" if locale have variant entry</li> |
| 367 | * </ul> |
| 368 | */ |
| 369 | public String getDefaultLocale() { |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 370 | final Locale locale = Locale.getDefault(); |
| 371 | |
Narayan Kamath | 39268ff | 2011-10-17 14:37:40 +0100 | [diff] [blame] | 372 | // Note that the default locale might have an empty variant |
| 373 | // or language, and we take care that the construction is |
| 374 | // the same as {@link #getV1Locale} i.e no trailing delimiters |
| 375 | // or spaces. |
| 376 | String defaultLocale = locale.getISO3Language(); |
| 377 | if (TextUtils.isEmpty(defaultLocale)) { |
| 378 | Log.w(TAG, "Default locale is empty."); |
| 379 | return ""; |
| 380 | } |
| 381 | |
| 382 | if (!TextUtils.isEmpty(locale.getISO3Country())) { |
| 383 | defaultLocale += LOCALE_DELIMITER + locale.getISO3Country(); |
| 384 | } else { |
| 385 | // Do not allow locales of the form lang--variant with |
| 386 | // an empty country. |
| 387 | return defaultLocale; |
| 388 | } |
| 389 | if (!TextUtils.isEmpty(locale.getVariant())) { |
| 390 | defaultLocale += LOCALE_DELIMITER + locale.getVariant(); |
| 391 | } |
| 392 | |
| 393 | return defaultLocale; |
Narayan Kamath | e5b8c4d | 2011-08-22 15:37:47 +0100 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Parses a comma separated list of engine locale preferences. The list is of the |
| 398 | * form {@code "engine_name_1:locale_1,engine_name_2:locale2"} and so on and |
| 399 | * so forth. Returns null if the list is empty, malformed or if there is no engine |
| 400 | * specific preference in the list. |
| 401 | */ |
| 402 | private static String parseEnginePrefFromList(String prefValue, String engineName) { |
| 403 | if (TextUtils.isEmpty(prefValue)) { |
| 404 | return null; |
| 405 | } |
| 406 | |
| 407 | String[] prefValues = prefValue.split(","); |
| 408 | |
| 409 | for (String value : prefValues) { |
| 410 | final int delimiter = value.indexOf(':'); |
| 411 | if (delimiter > 0) { |
| 412 | if (engineName.equals(value.substring(0, delimiter))) { |
| 413 | return value.substring(delimiter + 1); |
| 414 | } |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | return null; |
| 419 | } |
| 420 | |
| 421 | public synchronized void updateLocalePrefForEngine(String name, String newLocale) { |
| 422 | final String prefList = Settings.Secure.getString(mContext.getContentResolver(), |
| 423 | Settings.Secure.TTS_DEFAULT_LOCALE); |
| 424 | if (DBG) { |
| 425 | Log.d(TAG, "updateLocalePrefForEngine(" + name + ", " + newLocale + |
| 426 | "), originally: " + prefList); |
| 427 | } |
| 428 | |
| 429 | final String newPrefList = updateValueInCommaSeparatedList(prefList, |
| 430 | name, newLocale); |
| 431 | |
| 432 | if (DBG) Log.d(TAG, "updateLocalePrefForEngine(), writing: " + newPrefList.toString()); |
| 433 | |
| 434 | Settings.Secure.putString(mContext.getContentResolver(), |
| 435 | Settings.Secure.TTS_DEFAULT_LOCALE, newPrefList.toString()); |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * Updates the value for a given key in a comma separated list of key value pairs, |
| 440 | * each of which are delimited by a colon. If no value exists for the given key, |
| 441 | * the kay value pair are appended to the end of the list. |
| 442 | */ |
| 443 | private String updateValueInCommaSeparatedList(String list, String key, |
| 444 | String newValue) { |
| 445 | StringBuilder newPrefList = new StringBuilder(); |
| 446 | if (TextUtils.isEmpty(list)) { |
| 447 | // If empty, create a new list with a single entry. |
| 448 | newPrefList.append(key).append(':').append(newValue); |
| 449 | } else { |
| 450 | String[] prefValues = list.split(","); |
| 451 | // Whether this is the first iteration in the loop. |
| 452 | boolean first = true; |
| 453 | // Whether we found the given key. |
| 454 | boolean found = false; |
| 455 | for (String value : prefValues) { |
| 456 | final int delimiter = value.indexOf(':'); |
| 457 | if (delimiter > 0) { |
| 458 | if (key.equals(value.substring(0, delimiter))) { |
| 459 | if (first) { |
| 460 | first = false; |
| 461 | } else { |
| 462 | newPrefList.append(','); |
| 463 | } |
| 464 | found = true; |
| 465 | newPrefList.append(key).append(':').append(newValue); |
| 466 | } else { |
| 467 | if (first) { |
| 468 | first = false; |
| 469 | } else { |
| 470 | newPrefList.append(','); |
| 471 | } |
| 472 | // Copy across the entire key + value as is. |
| 473 | newPrefList.append(value); |
| 474 | } |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | if (!found) { |
| 479 | // Not found, but the rest of the keys would have been copied |
| 480 | // over already, so just append it to the end. |
| 481 | newPrefList.append(','); |
| 482 | newPrefList.append(key).append(':').append(newValue); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | return newPrefList.toString(); |
| 487 | } |
Narayan Kamath | d3ee2fa | 2011-06-10 16:19:52 +0100 | [diff] [blame] | 488 | } |