Extract l10n-related parts of NetworkScreenHandler to a helper file

chrome/browser/ui/webui/chromeos/login/l10n_util.h

+// Copyright 2014 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.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_L10N_UTIL_H_
+#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_L10N_UTIL_H_
+
+#include <string>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace chromeos {
+
+// GetUILanguageList() returns a concatenated list of the most relevant
+// languages followed by all others. An entry with its "code" attribute set to
+// this value is inserted in between.
+extern const char kMostRelevantLanguagesDivider[];
+
+// Utility methods for retrieving lists of supported locales and input methods /
+// keyboard layouts during OOBE and on the login screen.
+
+// Return a list of languages in which the UI can be shown. Each list entry is a
+// dictionary that contains data such as the language's locale code and a
+// display name. The list will consist of the |most_relevant_language_codes|,
+// followed by a divider and all other supported languages after that. If
+// |most_relevant_language_codes| is NULL, the most relevant languages are read
+// from initial_locale in VPD. If |selected| matches the locale code of any
+// entry in the resulting list, that entry will be marked as selected.
+scoped_ptr<base::ListValue> GetUILanguageList(
+    const std::vector<std::string>* most_relevant_language_codes,
+    const std::string& selected);
+
+// Return a list of supported accept languages. The listed languages can be used
+// in the Accept-Language header. The return value will look like:
+// [{'code': 'fi', 'displayName': 'Finnish', 'nativeDisplayName': 'suomi'}, ...]
+// The most relevant languages, read from initial_locale in VPD, will be first
+// in the list.
+scoped_ptr<base::ListValue> GetAcceptLanguageList();
+
+// Return a list of keyboard layouts that can be used for |locale| on the login
+// screen. Each list entry is a dictionary that contains data such as an ID and
+// a display name. The list will consist of the device's hardware layouts,
+// followed by a divider and locale-specific keyboard layouts, if any. The list
+// will also always contain the US keyboard layout. If |selected| matches the ID
+// of any entry in the resulting list, that entry will be marked as selected.
+// In addition to returning the list of keyboard layouts, this function also
+// activates them so that they can be selected by the user (e.g. by cycling
+// through keyboard layouts via keyboard shortcuts).
+scoped_ptr<base::ListValue> GetLoginKeyboardLayouts(
+    const std::string& locale,
+    const std::string& selected);
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_L10N_UTIL_H_