chrome/common/extensions/extension_l10n_util.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/common/extensions/extension_l10n_util.h"
   6
   7 #include <algorithm>
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/file_util.h"
  13 #include "base/files/file_enumerator.h"
  14 #include "base/json/json_file_value_serializer.h"
  15 #include "base/logging.h"
  16 #include "base/memory/linked_ptr.h"
  17 #include "base/strings/stringprintf.h"
  18 #include "base/strings/utf_string_conversions.h"
  19 #include "base/values.h"
  20 #include "chrome/common/extensions/extension_file_util.h"
  21 #include "chrome/common/extensions/message_bundle.h"
  22 #include "chrome/common/url_constants.h"
  23 #include "extensions/common/constants.h"
  24 #include "extensions/common/error_utils.h"
  25 #include "extensions/common/manifest_constants.h"
  26 #include "third_party/icu/source/common/unicode/uloc.h"
  27 #include "ui/base/l10n/l10n_util.h"
  28
  29 namespace errors = extensions::manifest_errors;
  30 namespace keys = extensions::manifest_keys;
  31
  32 namespace {
  33
  34 // Loads contents of the messages file for given locale. If file is not found,
  35 // or there was parsing error we return NULL and set |error|.
  36 // Caller owns the returned object.
  37 base::DictionaryValue* LoadMessageFile(const base::FilePath& locale_path,
  38                                        const std::string& locale,
  39                                        std::string* error) {
  40   base::FilePath file = locale_path.AppendASCII(locale)
  41       .Append(extensions::kMessagesFilename);
  42   JSONFileValueSerializer messages_serializer(file);
  43   base::Value* dictionary = messages_serializer.Deserialize(NULL, error);
  44   if (!dictionary) {
  45     if (error->empty()) {
  46       // JSONFileValueSerializer just returns NULL if file cannot be found. It
  47       // doesn't set the error, so we have to do it.
  48       *error = base::StringPrintf("Catalog file is missing for locale %s.",
  49                                   locale.c_str());
  50     } else {
  51       *error = extensions::ErrorUtils::FormatErrorMessage(
  52           errors::kLocalesInvalidLocale,
  53           base::UTF16ToUTF8(file.LossyDisplayName()),
  54           *error);
  55     }
  56   }
  57
  58   return static_cast<base::DictionaryValue*>(dictionary);
  59 }
  60
  61 // Localizes manifest value of string type for a given key.
  62 bool LocalizeManifestValue(const std::string& key,
  63                            const extensions::MessageBundle& messages,
  64                            base::DictionaryValue* manifest,
  65                            std::string* error) {
  66   std::string result;
  67   if (!manifest->GetString(key, &result))
  68     return true;
  69
  70   if (!messages.ReplaceMessages(&result, error))
  71     return false;
  72
  73   manifest->SetString(key, result);
  74   return true;
  75 }
  76
  77 // Localizes manifest value of list type for a given key.
  78 bool LocalizeManifestListValue(const std::string& key,
  79                                const extensions::MessageBundle& messages,
  80                                base::DictionaryValue* manifest,
  81                                std::string* error) {
  82   base::ListValue* list = NULL;
  83   if (!manifest->GetList(key, &list))
  84     return true;
  85
  86   bool ret = true;
  87   for (size_t i = 0; i < list->GetSize(); ++i) {
  88     std::string result;
  89     if (list->GetString(i, &result)) {
  90       if (messages.ReplaceMessages(&result, error))
  91         list->Set(i, new base::StringValue(result));
  92       else
  93         ret = false;
  94     }
  95   }
  96   return ret;
  97 }
  98
  99 std::string& GetProcessLocale() {
 100   CR_DEFINE_STATIC_LOCAL(std::string, locale, ());
 101   return locale;
 102 }
 103
 104 }  // namespace
 105
 106 namespace extension_l10n_util {
 107
 108 void SetProcessLocale(const std::string& locale) {
 109   GetProcessLocale() = locale;
 110 }
 111
 112 std::string GetDefaultLocaleFromManifest(const base::DictionaryValue& manifest,
 113                                          std::string* error) {
 114   std::string default_locale;
 115   if (manifest.GetString(keys::kDefaultLocale, &default_locale))
 116     return default_locale;
 117
 118   *error = errors::kInvalidDefaultLocale;
 119   return std::string();
 120 }
 121
 122 bool ShouldRelocalizeManifest(const base::DictionaryValue* manifest) {
 123   if (!manifest)
 124     return false;
 125
 126   if (!manifest->HasKey(keys::kDefaultLocale))
 127     return false;
 128
 129   std::string manifest_current_locale;
 130   manifest->GetString(keys::kCurrentLocale, &manifest_current_locale);
 131   return manifest_current_locale != CurrentLocaleOrDefault();
 132 }
 133
 134 bool LocalizeManifest(const extensions::MessageBundle& messages,
 135                       base::DictionaryValue* manifest,
 136                       std::string* error) {
 137   // Initialize name.
 138   std::string result;
 139   if (!manifest->GetString(keys::kName, &result)) {
 140     *error = errors::kInvalidName;
 141     return false;
 142   }
 143   if (!LocalizeManifestValue(keys::kName, messages, manifest, error)) {
 144     return false;
 145   }
 146
 147   // Initialize short name.
 148   if (!LocalizeManifestValue(keys::kShortName, messages, manifest, error))
 149     return false;
 150
 151   // Initialize description.
 152   if (!LocalizeManifestValue(keys::kDescription, messages, manifest, error))
 153     return false;
 154
 155   // Initialize browser_action.default_title
 156   std::string key(keys::kBrowserAction);
 157   key.append(".");
 158   key.append(keys::kPageActionDefaultTitle);
 159   if (!LocalizeManifestValue(key, messages, manifest, error))
 160     return false;
 161
 162   // Initialize page_action.default_title
 163   key.assign(keys::kPageAction);
 164   key.append(".");
 165   key.append(keys::kPageActionDefaultTitle);
 166   if (!LocalizeManifestValue(key, messages, manifest, error))
 167     return false;
 168
 169   // Initialize omnibox.keyword.
 170   if (!LocalizeManifestValue(keys::kOmniboxKeyword, messages, manifest, error))
 171     return false;
 172
 173   base::ListValue* file_handlers = NULL;
 174   if (manifest->GetList(keys::kFileBrowserHandlers, &file_handlers)) {
 175     key.assign(keys::kFileBrowserHandlers);
 176     for (size_t i = 0; i < file_handlers->GetSize(); i++) {
 177       base::DictionaryValue* handler = NULL;
 178       if (!file_handlers->GetDictionary(i, &handler)) {
 179         *error = errors::kInvalidFileBrowserHandler;
 180         return false;
 181       }
 182       if (!LocalizeManifestValue(keys::kPageActionDefaultTitle, messages,
 183                                  handler, error))
 184         return false;
 185     }
 186   }
 187
 188   base::ListValue* media_galleries_handlers = NULL;
 189   if (manifest->GetList(keys::kMediaGalleriesHandlers,
 190       &media_galleries_handlers)) {
 191     key.assign(keys::kMediaGalleriesHandlers);
 192     for (size_t i = 0; i < media_galleries_handlers->GetSize(); i++) {
 193       base::DictionaryValue* handler = NULL;
 194       if (!media_galleries_handlers->GetDictionary(i, &handler)) {
 195         *error = errors::kInvalidMediaGalleriesHandler;
 196         return false;
 197       }
 198       if (!LocalizeManifestValue(keys::kPageActionDefaultTitle, messages,
 199                                  handler, error))
 200         return false;
 201     }
 202   }
 203
 204   // Initialize all input_components
 205   base::ListValue* input_components = NULL;
 206   if (manifest->GetList(keys::kInputComponents, &input_components)) {
 207     for (size_t i = 0; i < input_components->GetSize(); ++i) {
 208       base::DictionaryValue* module = NULL;
 209       if (!input_components->GetDictionary(i, &module)) {
 210         *error = errors::kInvalidInputComponents;
 211         return false;
 212       }
 213       if (!LocalizeManifestValue(keys::kName, messages, module, error))
 214         return false;
 215       if (!LocalizeManifestValue(keys::kDescription, messages, module, error))
 216         return false;
 217     }
 218   }
 219
 220   // Initialize app.launch.local_path.
 221   if (!LocalizeManifestValue(keys::kLaunchLocalPath, messages, manifest, error))
 222     return false;
 223
 224   // Initialize app.launch.web_url.
 225   if (!LocalizeManifestValue(keys::kLaunchWebURL, messages, manifest, error))
 226     return false;
 227
 228   // Initialize description of commmands.
 229   base::DictionaryValue* commands_handler = NULL;
 230   if (manifest->GetDictionary(keys::kCommands, &commands_handler)) {
 231     for (base::DictionaryValue::Iterator iter(*commands_handler);
 232          !iter.IsAtEnd();
 233          iter.Advance()) {
 234       key.assign(base::StringPrintf("commands.%s.description",
 235                                     iter.key().c_str()));
 236       if (!LocalizeManifestValue(key, messages, manifest, error))
 237         return false;
 238     }
 239   }
 240
 241   // Initialize search_provider fields.
 242   base::DictionaryValue* search_provider = NULL;
 243   if (manifest->GetDictionary(keys::kSearchProvider, &search_provider)) {
 244     for (base::DictionaryValue::Iterator iter(*search_provider);
 245          !iter.IsAtEnd();
 246          iter.Advance()) {
 247       key.assign(base::StringPrintf("%s.%s", keys::kSearchProvider,
 248                                     iter.key().c_str()));
 249       bool success = (key == keys::kSettingsOverrideAlternateUrls) ?
 250           LocalizeManifestListValue(key, messages, manifest, error) :
 251           LocalizeManifestValue(key, messages, manifest, error);
 252       if (!success)
 253         return false;
 254     }
 255   }
 256
 257   // Add current locale key to the manifest, so we can overwrite prefs
 258   // with new manifest when chrome locale changes.
 259   manifest->SetString(keys::kCurrentLocale, CurrentLocaleOrDefault());
 260   return true;
 261 }
 262
 263 bool LocalizeExtension(const base::FilePath& extension_path,
 264                        base::DictionaryValue* manifest,
 265                        std::string* error) {
 266   DCHECK(manifest);
 267
 268   std::string default_locale = GetDefaultLocaleFromManifest(*manifest, error);
 269
 270   scoped_ptr<extensions::MessageBundle> message_bundle(
 271       extension_file_util::LoadMessageBundle(
 272           extension_path, default_locale, error));
 273
 274   if (!message_bundle.get() && !error->empty())
 275     return false;
 276
 277   if (message_bundle.get() &&
 278       !LocalizeManifest(*message_bundle, manifest, error))
 279     return false;
 280
 281   return true;
 282 }
 283
 284 bool AddLocale(const std::set<std::string>& chrome_locales,
 285                const base::FilePath& locale_folder,
 286                const std::string& locale_name,
 287                std::set<std::string>* valid_locales,
 288                std::string* error) {
 289   // Accept name that starts with a . but don't add it to the list of supported
 290   // locales.
 291   if (locale_name.find(".") == 0)
 292     return true;
 293   if (chrome_locales.find(locale_name) == chrome_locales.end()) {
 294     // Warn if there is an extension locale that's not in the Chrome list,
 295     // but don't fail.
 296     DLOG(WARNING) << base::StringPrintf("Supplied locale %s is not supported.",
 297                                         locale_name.c_str());
 298     return true;
 299   }
 300   // Check if messages file is actually present (but don't check content).
 301   if (base::PathExists(
 302       locale_folder.Append(extensions::kMessagesFilename))) {
 303     valid_locales->insert(locale_name);
 304   } else {
 305     *error = base::StringPrintf("Catalog file is missing for locale %s.",
 306                                 locale_name.c_str());
 307     return false;
 308   }
 309
 310   return true;
 311 }
 312
 313 std::string CurrentLocaleOrDefault() {
 314   std::string current_locale = l10n_util::NormalizeLocale(GetProcessLocale());
 315   if (current_locale.empty())
 316     current_locale = "en";
 317
 318   return current_locale;
 319 }
 320
 321 void GetAllLocales(std::set<std::string>* all_locales) {
 322   const std::vector<std::string>& available_locales =
 323       l10n_util::GetAvailableLocales();
 324   // Add all parents of the current locale to the available locales set.
 325   // I.e. for sr_Cyrl_RS we add sr_Cyrl_RS, sr_Cyrl and sr.
 326   for (size_t i = 0; i < available_locales.size(); ++i) {
 327     std::vector<std::string> result;
 328     l10n_util::GetParentLocales(available_locales[i], &result);
 329     all_locales->insert(result.begin(), result.end());
 330   }
 331 }
 332
 333 void GetAllFallbackLocales(const std::string& application_locale,
 334                            const std::string& default_locale,
 335                            std::vector<std::string>* all_fallback_locales) {
 336   DCHECK(all_fallback_locales);
 337   if (!application_locale.empty() && application_locale != default_locale)
 338     l10n_util::GetParentLocales(application_locale, all_fallback_locales);
 339   all_fallback_locales->push_back(default_locale);
 340 }
 341
 342 bool GetValidLocales(const base::FilePath& locale_path,
 343                      std::set<std::string>* valid_locales,
 344                      std::string* error) {
 345   std::set<std::string> chrome_locales;
 346   GetAllLocales(&chrome_locales);
 347
 348   // Enumerate all supplied locales in the extension.
 349   base::FileEnumerator locales(locale_path,
 350                                false,
 351                                base::FileEnumerator::DIRECTORIES);
 352   base::FilePath locale_folder;
 353   while (!(locale_folder = locales.Next()).empty()) {
 354     std::string locale_name = locale_folder.BaseName().MaybeAsASCII();
 355     if (locale_name.empty()) {
 356       NOTREACHED();
 357       continue;  // Not ASCII.
 358     }
 359     if (!AddLocale(chrome_locales,
 360                    locale_folder,
 361                    locale_name,
 362                    valid_locales,
 363                    error)) {
 364       return false;
 365     }
 366   }
 367
 368   if (valid_locales->empty()) {
 369     *error = errors::kLocalesNoValidLocaleNamesListed;
 370     return false;
 371   }
 372
 373   return true;
 374 }
 375
 376 extensions::MessageBundle* LoadMessageCatalogs(
 377     const base::FilePath& locale_path,
 378     const std::string& default_locale,
 379     const std::string& application_locale,
 380     const std::set<std::string>& valid_locales,
 381     std::string* error) {
 382   std::vector<std::string> all_fallback_locales;
 383   GetAllFallbackLocales(application_locale, default_locale,
 384       &all_fallback_locales);
 385
 386   std::vector<linked_ptr<base::DictionaryValue> > catalogs;
 387   for (size_t i = 0; i < all_fallback_locales.size(); ++i) {
 388     // Skip all parent locales that are not supplied.
 389     if (valid_locales.find(all_fallback_locales[i]) == valid_locales.end())
 390       continue;
 391     linked_ptr<base::DictionaryValue> catalog(
 392       LoadMessageFile(locale_path, all_fallback_locales[i], error));
 393     if (!catalog.get()) {
 394       // If locale is valid, but messages.json is corrupted or missing, return
 395       // an error.
 396       return NULL;
 397     } else {
 398       catalogs.push_back(catalog);
 399     }
 400   }
 401
 402   return extensions::MessageBundle::Create(catalogs, error);
 403 }
 404
 405 bool ValidateExtensionLocales(const base::FilePath& extension_path,
 406                               const base::DictionaryValue* manifest,
 407                               std::string* error) {
 408   std::string default_locale = GetDefaultLocaleFromManifest(*manifest, error);
 409
 410   if (default_locale.empty())
 411     return true;
 412
 413   base::FilePath locale_path =
 414       extension_path.Append(extensions::kLocaleFolder);
 415
 416   std::set<std::string> valid_locales;
 417   if (!GetValidLocales(locale_path, &valid_locales, error))
 418     return false;
 419
 420   for (std::set<std::string>::const_iterator locale = valid_locales.begin();
 421        locale != valid_locales.end(); ++locale) {
 422     std::string locale_error;
 423     scoped_ptr<base::DictionaryValue> catalog(
 424         LoadMessageFile(locale_path, *locale, &locale_error));
 425
 426     if (!locale_error.empty()) {
 427       if (!error->empty())
 428         error->append(" ");
 429       error->append(locale_error);
 430     }
 431   }
 432
 433   return error->empty();
 434 }
 435
 436 bool ShouldSkipValidation(const base::FilePath& locales_path,
 437                           const base::FilePath& locale_path,
 438                           const std::set<std::string>& all_locales) {
 439   // Since we use this string as a key in a DictionaryValue, be paranoid about
 440   // skipping any strings with '.'. This happens sometimes, for example with
 441   // '.svn' directories.
 442   base::FilePath relative_path;
 443   if (!locales_path.AppendRelativePath(locale_path, &relative_path)) {
 444     NOTREACHED();
 445     return true;
 446   }
 447   std::string subdir = relative_path.MaybeAsASCII();
 448   if (subdir.empty())
 449     return true;  // Non-ASCII.
 450
 451   if (std::find(subdir.begin(), subdir.end(), '.') != subdir.end())
 452     return true;
 453
 454   if (all_locales.find(subdir) == all_locales.end())
 455     return true;
 456
 457   return false;
 458 }
 459
 460 ScopedLocaleForTest::ScopedLocaleForTest()
 461     : locale_(extension_l10n_util::CurrentLocaleOrDefault()) {}
 462
 463 ScopedLocaleForTest::ScopedLocaleForTest(const std::string& locale)
 464     : locale_(extension_l10n_util::CurrentLocaleOrDefault()) {
 465   extension_l10n_util::SetProcessLocale(locale);
 466 }
 467
 468 ScopedLocaleForTest::~ScopedLocaleForTest() {
 469   extension_l10n_util::SetProcessLocale(locale_);
 470 }
 471
 472 }  // namespace extension_l10n_util