src/chrome/browser/chromeos/base/locale_util.cc

   1 // Copyright 2013 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/browser/chromeos/base/locale_util.h"
   6
   7 #include <vector>
   8
   9 #include "chrome/browser/browser_process.h"
  10 #include "chrome/browser/chromeos/input_method/input_method_util.h"
  11 #include "chromeos/ime/input_method_manager.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "ui/base/resource/resource_bundle.h"
  14 #include "ui/gfx/platform_font_pango.h"
  15
  16 namespace chromeos {
  17
  18 namespace {
  19
  20 struct SwitchLanguageData {
  21   SwitchLanguageData(const std::string& locale,
  22                      const bool enableLocaleKeyboardLayouts,
  23                      const bool login_layouts_only,
  24                      scoped_ptr<locale_util::SwitchLanguageCallback> callback)
  25       : callback(callback.Pass()),
  26         locale(locale),
  27         enableLocaleKeyboardLayouts(enableLocaleKeyboardLayouts),
  28         login_layouts_only(login_layouts_only),
  29         success(false) {}
  30
  31   scoped_ptr<locale_util::SwitchLanguageCallback> callback;
  32
  33   const std::string locale;
  34   const bool enableLocaleKeyboardLayouts;
  35   const bool login_layouts_only;
  36   std::string loaded_locale;
  37   bool success;
  38 };
  39
  40 // Runs on SequencedWorkerPool thread under PostTaskAndReply().
  41 // So data is owned by "Reply" part of PostTaskAndReply() process.
  42 void SwitchLanguageDoReloadLocale(SwitchLanguageData* data) {
  43   DCHECK(!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  44
  45   data->loaded_locale =
  46       ResourceBundle::GetSharedInstance().ReloadLocaleResources(data->locale);
  47
  48   data->success = !data->loaded_locale.empty();
  49
  50   ResourceBundle::GetSharedInstance().ReloadFonts();
  51 }
  52
  53 // Callback after SwitchLanguageDoReloadLocale() back in UI thread.
  54 void FinishSwitchLanguage(scoped_ptr<SwitchLanguageData> data) {
  55   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  56   if (data->success) {
  57     g_browser_process->SetApplicationLocale(data->loaded_locale);
  58
  59     if (data->enableLocaleKeyboardLayouts) {
  60       // If we have switched the locale, enable the keyboard layouts that
  61       // are necessary for the new locale.  Change the current input method
  62       // to the hardware keyboard layout since the input method currently in
  63       // use may not be supported by the new locale (3rd parameter).
  64       input_method::InputMethodManager* manager =
  65           input_method::InputMethodManager::Get();
  66       manager->EnableLoginLayouts(
  67           data->locale,
  68           manager->GetInputMethodUtil()->GetHardwareLoginInputMethodIds());
  69       if (!data->login_layouts_only) {
  70         // Enable all the other layouts
  71         std::vector<std::string> candidates;
  72         input_method::InputMethodUtil* util = manager->GetInputMethodUtil();
  73         // Add input methods associated with the language.
  74         util->GetInputMethodIdsFromLanguageCode(
  75             data->locale, input_method::kKeyboardLayoutsOnly, &candidates);
  76         for (std::vector<std::string>::const_iterator i = candidates.begin();
  77              i != candidates.end();
  78              ++i)
  79           manager->EnableInputMethod(*i);
  80       }
  81     }
  82   }
  83   gfx::PlatformFontPango::ReloadDefaultFont();
  84   if (data->callback)
  85     data->callback->Run(data->locale, data->loaded_locale, data->success);
  86 }
  87
  88 }  // namespace
  89
  90 namespace locale_util {
  91
  92 void SwitchLanguage(const std::string& locale,
  93                     const bool enableLocaleKeyboardLayouts,
  94                     const bool login_layouts_only,
  95                     scoped_ptr<SwitchLanguageCallback> callback) {
  96   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  97   scoped_ptr<SwitchLanguageData> data(
  98       new SwitchLanguageData(locale,
  99                              enableLocaleKeyboardLayouts,
 100                              login_layouts_only,
 101                              callback.Pass()));
 102   base::Closure reloader(
 103       base::Bind(&SwitchLanguageDoReloadLocale, base::Unretained(data.get())));
 104   content::BrowserThread::PostBlockingPoolTaskAndReply(
 105       FROM_HERE,
 106       reloader,
 107       base::Bind(&FinishSwitchLanguage, base::Passed(data.Pass())));
 108 }
 109
 110 }  // namespace locale_util
 111 }  // namespace chromeos