input_method_api.cc revision 90dce4d38c5ff5333bea97d859d4e484e27edf0c 
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
17namespace {
18
19// Prefix, which is used by XKB.
20const char kXkbPrefix[] = "xkb:";
21
22}  // namespace
23
24namespace extensions {
25
26GetInputMethodFunction::GetInputMethodFunction() {
27}
28
29GetInputMethodFunction::~GetInputMethodFunction() {
30}
31
32bool 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
46StartImeFunction::StartImeFunction() {
47}
48
49StartImeFunction::~StartImeFunction() {
50}
51
52bool 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
65InputMethodAPI::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
75InputMethodAPI::~InputMethodAPI() {
76}
77
78// static
79std::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
85void 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
91void 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
99static base::LazyInstance<ProfileKeyedAPIFactory<InputMethodAPI> >
100    g_factory = LAZY_INSTANCE_INITIALIZER;
101
102// static
103ProfileKeyedAPIFactory<InputMethodAPI>* InputMethodAPI::GetFactoryInstance() {
104  return &g_factory.Get();
105}
106
107}  // namespace extensions
108