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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/language_combobox_model.h"
#include "app/l10n_util.h"
#include "base/string_util.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/metrics/user_metrics.h"
#include "chrome/common/pref_service.h"
#include "grit/generated_resources.h"
#include "unicode/uloc.h"
///////////////////////////////////////////////////////////////////////////////
// LanguageComboboxModel used to populate a combobox with native names
// corresponding to the language code (e.g. English (United States) for en-US)
//
LanguageComboboxModel::LanguageComboboxModel()
: profile_(NULL) {
// Enumerate the languages we know about.
const std::vector<std::string>& locale_codes =
l10n_util::GetAvailableLocales();
InitNativeNames(locale_codes);
}
LanguageComboboxModel::LanguageComboboxModel(
Profile* profile, const std::vector<std::string>& locale_codes)
: profile_(profile) {
InitNativeNames(locale_codes);
}
void LanguageComboboxModel::InitNativeNames(
const std::vector<std::string>& locale_codes) {
const std::string app_locale = g_browser_process->GetApplicationLocale();
for (size_t i = 0; i < locale_codes.size(); ++i) {
std::string locale_code_str = locale_codes[i];
const char* locale_code = locale_codes[i].c_str();
// Internally, we use the language code of zh-CN and zh-TW, but we want the
// display names to be Chinese (Simplified) and Chinese (Traditional). To
// do that, we use zh-hans and zh-hant when using ICU's
// uloc_getDisplayName.
if (locale_code_str == "zh-CN") {
locale_code = "zh-hans";
} else if (locale_code_str == "zh-TW") {
locale_code = "zh-hant";
}
UErrorCode error = U_ZERO_ERROR;
const int buffer_size = 1024;
string16 name_local;
int actual_size = uloc_getDisplayName(locale_code, app_locale.c_str(),
WriteInto(&name_local, buffer_size + 1), buffer_size, &error);
DCHECK(U_SUCCESS(error));
name_local.resize(actual_size);
string16 name_native;
actual_size = uloc_getDisplayName(locale_code, locale_code,
WriteInto(&name_native, buffer_size + 1), buffer_size, &error);
DCHECK(U_SUCCESS(error));
name_native.resize(actual_size);
locale_names_.push_back(UTF16ToWideHack(name_local));
native_names_[UTF16ToWideHack(name_local)] = LocaleData(
UTF16ToWideHack(name_native), locale_codes[i]);
}
// Sort using locale specific sorter.
l10n_util::SortStrings(g_browser_process->GetApplicationLocale(),
&locale_names_);
}
// Overridden from ComboboxModel:
int LanguageComboboxModel::GetItemCount() {
return static_cast<int>(locale_names_.size());
}
std::wstring LanguageComboboxModel::GetItemAt(int index) {
DCHECK(static_cast<int>(locale_names_.size()) > index);
LocaleDataMap::const_iterator it =
native_names_.find(locale_names_[index]);
DCHECK(it != native_names_.end());
// If the name is the same in the native language and local language,
// don't show it twice.
if (it->second.native_name == locale_names_[index])
return it->second.native_name;
// We must add directionality formatting to both the native name and the
// locale name in order to avoid text rendering problems such as misplaced
// parentheses or languages appearing in the wrong order.
std::wstring locale_name_localized;
std::wstring locale_name;
if (l10n_util::AdjustStringForLocaleDirection(locale_names_[index],
&locale_name_localized))
locale_name.assign(locale_name_localized);
else
locale_name.assign(locale_names_[index]);
std::wstring native_name_localized;
std::wstring native_name;
if (l10n_util::AdjustStringForLocaleDirection(it->second.native_name,
&native_name_localized))
native_name.assign(native_name_localized);
else
native_name.assign(it->second.native_name);
// We used to have a localizable template here, but none of translators
// changed the format. We also want to switch the order of locale_name
// and native_name without going back to translators.
std::wstring formatted_item;
SStringPrintf(&formatted_item, L"%ls - %ls", locale_name.c_str(),
native_name.c_str());
if (l10n_util::GetTextDirection() == l10n_util::RIGHT_TO_LEFT)
// Somehow combo box (even with LAYOUTRTL flag) doesn't get this
// right so we add RTL BDO (U+202E) to set the direction
// explicitly.
formatted_item.insert(0, L"\x202E");
return formatted_item;
}
// Return the locale for the given index. E.g., may return pt-BR.
std::string LanguageComboboxModel::GetLocaleFromIndex(int index) {
DCHECK(static_cast<int>(locale_names_.size()) > index);
LocaleDataMap::const_iterator it =
native_names_.find(locale_names_[index]);
DCHECK(it != native_names_.end());
return it->second.locale_code;
}
int LanguageComboboxModel::GetIndexFromLocale(const std::string& locale) {
for (size_t i = 0; i < locale_names_.size(); ++i) {
LocaleDataMap::const_iterator it =
native_names_.find(locale_names_[i]);
DCHECK(it != native_names_.end());
if (it->second.locale_code == locale)
return static_cast<int>(i);
}
return -1;
}
// Returns the index of the language currently specified in the user's
// preference file. Note that it's possible for language A to be picked
// while chrome is currently in language B if the user specified language B
// via --lang. Since --lang is not a persistent setting, it seems that it
// shouldn't be reflected in this combo box. We return -1 if the value in
// the pref doesn't map to a know language (possible if the user edited the
// prefs file manually).
int LanguageComboboxModel::GetSelectedLanguageIndex(const std::wstring& prefs) {
PrefService* local_state;
if (!profile_)
local_state = g_browser_process->local_state();
else
local_state = profile_->GetPrefs();
DCHECK(local_state);
const std::string& current_locale =
WideToASCII(local_state->GetString(prefs.c_str()));
return GetIndexFromLocale(current_locale);
}
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