src/chrome/browser/chromeos/extensions/input_method_api.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/browser/chromeos/extensions/input_method_api.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/values.h"
   9 #include "chrome/browser/chromeos/extensions/input_method_event_router.h"
  10 #include "chrome/browser/extensions/api/input_ime/input_ime_api.h"
  11 #include "chrome/browser/extensions/event_names.h"
  12 #include "chrome/browser/extensions/extension_function_registry.h"
  13 #include "chrome/browser/extensions/extension_system.h"
  14 #include "chrome/browser/profiles/profile.h"
  15 #include "chromeos/ime/input_method_manager.h"
  16
  17 namespace {
  18
  19 // Prefix, which is used by XKB.
  20 const char kXkbPrefix[] = "xkb:";
  21
  22 }  // namespace
  23
  24 namespace extensions {
  25
  26 GetInputMethodFunction::GetInputMethodFunction() {
  27 }
  28
  29 GetInputMethodFunction::~GetInputMethodFunction() {
  30 }
  31
  32 bool GetInputMethodFunction::RunImpl() {
  33 #if !defined(OS_CHROMEOS)
  34   NOTREACHED();
  35   return false;
  36 #else
  37   chromeos::input_method::InputMethodManager* manager =
  38       chromeos::input_method::InputMethodManager::Get();
  39   const std::string input_method = InputMethodAPI::GetInputMethodForXkb(
  40       manager->GetCurrentInputMethod().id());
  41   SetResult(Value::CreateStringValue(input_method));
  42   return true;
  43 #endif
  44 }
  45
  46 StartImeFunction::StartImeFunction() {
  47 }
  48
  49 StartImeFunction::~StartImeFunction() {
  50 }
  51
  52 bool StartImeFunction::RunImpl() {
  53 #if !defined(OS_CHROMEOS)
  54   NOTREACHED();
  55   return false;
  56 #else
  57   chromeos::InputMethodEngine* engine =
  58       InputImeEventRouter::GetInstance()->GetActiveEngine(extension_id());
  59   if (engine)
  60     engine->StartIme();
  61   return true;
  62 #endif
  63 }
  64
  65 InputMethodAPI::InputMethodAPI(Profile* profile)
  66     : profile_(profile) {
  67   ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
  68       this, event_names::kOnInputMethodChanged);
  69   ExtensionFunctionRegistry* registry =
  70       ExtensionFunctionRegistry::GetInstance();
  71   registry->RegisterFunction<GetInputMethodFunction>();
  72   registry->RegisterFunction<StartImeFunction>();
  73 }
  74
  75 InputMethodAPI::~InputMethodAPI() {
  76 }
  77
  78 // static
  79 std::string InputMethodAPI::GetInputMethodForXkb(const std::string& xkb_id) {
  80   size_t prefix_length = std::string(kXkbPrefix).length();
  81   DCHECK(xkb_id.substr(0, prefix_length) == kXkbPrefix);
  82   return xkb_id.substr(prefix_length);
  83 }
  84
  85 void InputMethodAPI::Shutdown() {
  86   // UnregisterObserver may have already been called in OnListenerAdded,
  87   // but it is safe to call it more than once.
  88   ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
  89 }
  90
  91 void InputMethodAPI::OnListenerAdded(
  92     const extensions::EventListenerInfo& details) {
  93   DCHECK(!input_method_event_router_.get());
  94   input_method_event_router_.reset(
  95       new chromeos::ExtensionInputMethodEventRouter());
  96   ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
  97 }
  98
  99 static base::LazyInstance<ProfileKeyedAPIFactory<InputMethodAPI> >
 100     g_factory = LAZY_INSTANCE_INITIALIZER;
 101
 102 // static
 103 ProfileKeyedAPIFactory<InputMethodAPI>* InputMethodAPI::GetFactoryInstance() {
 104   return &g_factory.Get();
 105 }
 106
 107 }  // namespace extensions