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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/extension_l10n_util.h"
#include <set>
#include <string>
#include <vector>
#include "app/l10n_util.h"
#include "base/file_util.h"
#include "base/linked_ptr.h"
#include "base/string_util.h"
#include "base/values.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/common/extensions/extension_message_bundle.h"
#include "chrome/common/json_value_serializer.h"
namespace errors = extension_manifest_errors;
namespace keys = extension_manifest_keys;
namespace extension_l10n_util {
std::string GetDefaultLocaleFromManifest(const DictionaryValue& manifest,
std::string* error) {
std::string default_locale;
if (!manifest.GetString(keys::kDefaultLocale, &default_locale)) {
*error = errors::kInvalidDefaultLocale;
return "";
}
return default_locale;
}
bool AddLocale(const std::set<std::string>& chrome_locales,
const FilePath& locale_folder,
const std::string& locale_name,
std::set<std::string>* valid_locales,
std::string* error) {
// Accept name that starts with a . but don't add it to the list of supported
// locales.
if (locale_name.find(".") == 0)
return true;
if (chrome_locales.find(locale_name) == chrome_locales.end()) {
// Fail if there is an extension locale that's not in the Chrome list.
*error = StringPrintf("Supplied locale %s is not supported.",
locale_name.c_str());
return false;
}
// Check if messages file is actually present (but don't check content).
if (file_util::PathExists(
locale_folder.AppendASCII(Extension::kMessagesFilename))) {
valid_locales->insert(locale_name);
} else {
*error = StringPrintf("Catalog file is missing for locale %s.",
locale_name.c_str());
return false;
}
return true;
}
std::string NormalizeLocale(const std::string& locale) {
std::string normalized_locale(locale);
std::replace(normalized_locale.begin(), normalized_locale.end(), '-', '_');
return normalized_locale;
}
void GetParentLocales(const std::string& current_locale,
std::vector<std::string>* parent_locales) {
std::string locale(NormalizeLocale(current_locale));
const int kNameCapacity = 256;
char parent[kNameCapacity];
strncpy(parent, locale.c_str(), kNameCapacity);
parent_locales->push_back(parent);
UErrorCode err = U_ZERO_ERROR;
while (uloc_getParent(parent, parent, kNameCapacity, &err) > 0) {
if (err != U_ZERO_ERROR)
break;
parent_locales->push_back(parent);
}
}
// Extends list of Chrome locales to them and their parents, so we can do
// proper fallback.
static void GetAllLocales(std::set<std::string>* all_locales) {
const std::vector<std::string>& available_locales =
l10n_util::GetAvailableLocales();
// Add all parents of the current locale to the available locales set.
// I.e. for sr_Cyrl_RS we add sr_Cyrl_RS, sr_Cyrl and sr.
for (size_t i = 0; i < available_locales.size(); ++i) {
std::vector<std::string> result;
GetParentLocales(available_locales[i], &result);
all_locales->insert(result.begin(), result.end());
}
}
bool GetValidLocales(const FilePath& locale_path,
std::set<std::string>* valid_locales,
std::string* error) {
static std::set<std::string> chrome_locales;
GetAllLocales(&chrome_locales);
// Enumerate all supplied locales in the extension.
file_util::FileEnumerator locales(locale_path,
false,
file_util::FileEnumerator::DIRECTORIES);
FilePath locale_folder;
while (!(locale_folder = locales.Next()).empty()) {
std::string locale_name =
WideToASCII(locale_folder.BaseName().ToWStringHack());
if (!AddLocale(chrome_locales,
locale_folder,
locale_name,
valid_locales,
error)) {
return false;
}
}
if (valid_locales->empty()) {
*error = extension_manifest_errors::kLocalesNoValidLocaleNamesListed;
return false;
}
return true;
}
// Loads contents of the messages file for given locale. If file is not found,
// or there was parsing error we return NULL and set |error|.
// Caller owns the returned object.
static DictionaryValue* LoadMessageFile(const FilePath& locale_path,
const std::string& locale,
std::string* error) {
std::string extension_locale = locale;
FilePath file = locale_path.AppendASCII(extension_locale)
.AppendASCII(Extension::kMessagesFilename);
JSONFileValueSerializer messages_serializer(file);
Value *dictionary = messages_serializer.Deserialize(error);
if (!dictionary && error->empty()) {
// JSONFileValueSerializer just returns NULL if file cannot be found. It
// doesn't set the error, so we have to do it.
*error = StringPrintf("Catalog file is missing for locale %s.",
extension_locale.c_str());
}
return static_cast<DictionaryValue*>(dictionary);
}
ExtensionMessageBundle* LoadMessageCatalogs(
const FilePath& locale_path,
const std::string& default_locale,
const std::string& application_locale,
const std::set<std::string>& valid_locales,
std::string* error) {
// Order locales to load as current_locale, first_parent, ..., default_locale.
std::vector<std::string> all_fallback_locales;
if (!application_locale.empty() && application_locale != default_locale)
GetParentLocales(application_locale, &all_fallback_locales);
all_fallback_locales.push_back(default_locale);
std::vector<linked_ptr<DictionaryValue> > catalogs;
for (size_t i = 0; i < all_fallback_locales.size(); ++i) {
// Skip all parent locales that are not supplied.
if (valid_locales.find(all_fallback_locales[i]) == valid_locales.end())
continue;
linked_ptr<DictionaryValue> catalog(
LoadMessageFile(locale_path, all_fallback_locales[i], error));
if (!catalog.get()) {
// If locale is valid, but messages.json is corrupted or missing, return
// an error.
return false;
} else {
catalogs.push_back(catalog);
}
}
return ExtensionMessageBundle::Create(catalogs, error);
}
void GetL10nRelativePaths(const FilePath& relative_resource_path,
std::vector<FilePath>* l10n_paths) {
DCHECK(NULL != l10n_paths);
std::vector<std::string> locales;
static const std::string current_locale =
l10n_util::GetApplicationLocale(L"");
GetParentLocales(current_locale, &locales);
FilePath locale_relative_path;
for (size_t i = 0; i < locales.size(); ++i) {
l10n_paths->push_back(locale_relative_path
.AppendASCII(Extension::kLocaleFolder)
.AppendASCII(locales[i])
.Append(relative_resource_path));
}
}
} // namespace extension_l10n_util
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