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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/speech/speech_input_extension_api.h" | |
6 | |
7 #include "base/bind.h" | |
8 #include "base/values.h" | |
9 #include "chrome/browser/browser_process.h" | |
10 #include "chrome/browser/profiles/profile.h" | |
11 #include "chrome/browser/speech/speech_input_extension_manager.h" | |
12 #include "chrome/common/chrome_notification_types.h" | |
13 #include "content/public/browser/browser_thread.h" | |
14 #include "content/public/browser/notification_details.h" | |
15 #include "content/public/browser/notification_source.h" | |
16 | |
17 using content::BrowserThread; | |
18 | |
19 namespace { | |
20 | |
21 const char kLanguageKey[] = "language"; | |
22 const char kGrammarKey[] = "grammar"; | |
23 const char kFilterProfanitiesKey[] = "filterProfanities"; | |
24 | |
25 const char kDefaultGrammar[] = "builtin:dictation"; | |
26 const bool kDefaultFilterProfanities = true; | |
27 | |
28 } // anonymous namespace | |
29 | |
30 SpeechInputAsyncFunction::SpeechInputAsyncFunction( | |
31 int start_state, | |
32 int transition_state, | |
33 int end_state, | |
34 int transition_notification) | |
35 : start_state_(start_state), | |
36 transition_state_(transition_state), | |
37 end_state_(end_state), | |
38 transition_notification_(transition_notification), | |
39 expecting_transition_(false), | |
40 failed_(false) { | |
41 registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_FAILED, | |
42 content::Source<Profile>(profile())); | |
43 } | |
44 | |
45 SpeechInputAsyncFunction::~SpeechInputAsyncFunction() {} | |
46 | |
47 void SpeechInputAsyncFunction::Run() { | |
48 if (failed_) { | |
49 registrar_.RemoveAll(); | |
50 SendResponse(false); | |
51 return; | |
52 } | |
53 | |
54 SpeechInputExtensionManager::State state = | |
55 SpeechInputExtensionManager::GetForProfile(profile())->state(); | |
56 | |
57 // RunImpl should be always called once independently of the state we're in, | |
58 // otherwise we might miss requestDenied error situations. | |
59 if (!expecting_transition_) { | |
60 SpeechInputExtensionManager::State state_before_call = state; | |
61 | |
62 // Register before RunImpl to ensure it's received if generated. | |
63 if (state_before_call == start_state_) { | |
64 registrar_.Add(this, transition_notification_, | |
65 content::Source<Profile>(profile())); | |
66 AddRef(); // Balanced in Observe(). | |
67 } | |
68 | |
69 if (!RunImpl()) { | |
70 registrar_.RemoveAll(); | |
71 SendResponse(false); | |
72 return; | |
73 } | |
74 | |
75 // RunImpl should always return false and set the appropriate error code | |
76 // when called in a state different to the start one. | |
77 DCHECK_EQ(state_before_call, start_state_); | |
78 | |
79 state = SpeechInputExtensionManager::GetForProfile(profile())->state(); | |
80 DCHECK_EQ(state, transition_state_); | |
81 expecting_transition_ = true; | |
82 } | |
83 | |
84 if (state == transition_state_) | |
85 return; | |
86 | |
87 DCHECK_EQ(state, end_state_); | |
88 registrar_.RemoveAll(); | |
89 SendResponse(true); | |
90 } | |
91 | |
92 void SpeechInputAsyncFunction::Observe( | |
93 int type, | |
94 const content::NotificationSource& source, | |
95 const content::NotificationDetails& details) { | |
96 DCHECK_EQ(profile(), content::Source<Profile>(source).ptr()); | |
97 | |
98 if (type == chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_FAILED) { | |
99 SpeechInputExtensionManager::ExtensionError* error_details = | |
100 content::Details<SpeechInputExtensionManager::ExtensionError>( | |
101 details).ptr(); | |
102 if (error_details->extension_id_ != extension_id()) | |
103 return; | |
104 | |
105 error_ = error_details->error_; | |
106 failed_ = true; | |
107 } else { | |
108 DCHECK_EQ(type, transition_notification_); | |
109 if (*content::Details<std::string>(details).ptr() != extension_id()) | |
110 return; | |
111 DCHECK(expecting_transition_); | |
112 } | |
113 | |
114 Run(); | |
115 Release(); // Balanced in Run(). | |
116 } | |
117 | |
118 StartSpeechInputFunction::StartSpeechInputFunction() | |
119 : SpeechInputAsyncFunction(SpeechInputExtensionManager::kIdle, | |
120 SpeechInputExtensionManager::kStarting, | |
121 SpeechInputExtensionManager::kRecording, | |
122 chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_RECORDING_STARTED) { | |
123 } | |
124 | |
125 bool StartSpeechInputFunction::RunImpl() { | |
126 std::string language; | |
127 std::string grammar = kDefaultGrammar; | |
128 bool filter_profanities = kDefaultFilterProfanities; | |
129 | |
130 if (!args_->empty()) { | |
131 DictionaryValue *options; | |
132 if (!args_->GetDictionary(0, &options)) | |
133 return false; | |
134 DCHECK(options); | |
135 | |
136 if (options->HasKey(kLanguageKey)) | |
137 options->GetString(kLanguageKey, &language); | |
138 if (options->HasKey(kGrammarKey)) | |
139 options->GetString(kGrammarKey, &grammar); | |
140 | |
141 if (options->HasKey(kFilterProfanitiesKey)) { | |
142 options->GetBoolean(kFilterProfanitiesKey, | |
143 &filter_profanities); | |
144 } | |
145 } | |
146 | |
147 // Use the application locale if the language is empty or not provided. | |
148 if (language.empty()) { | |
149 language = g_browser_process->GetApplicationLocale(); | |
150 VLOG(1) << "Language not specified. Using application locale " << language; | |
151 } | |
152 | |
153 return SpeechInputExtensionManager::GetForProfile(profile())->Start( | |
154 extension_id(), language, grammar, filter_profanities, &error_); | |
155 } | |
156 | |
157 StopSpeechInputFunction::StopSpeechInputFunction() | |
158 : SpeechInputAsyncFunction(SpeechInputExtensionManager::kRecording, | |
159 SpeechInputExtensionManager::kStopping, | |
160 SpeechInputExtensionManager::kIdle, | |
161 chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_RECORDING_STOPPED) { | |
162 } | |
163 | |
164 bool StopSpeechInputFunction::RunImpl() { | |
165 return SpeechInputExtensionManager::GetForProfile( | |
166 profile())->Stop(extension_id(), &error_); | |
167 } | |
168 | |
169 void IsRecordingSpeechInputFunction::SetIsRecordingResult(bool result) { | |
170 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
171 SetResult(Value::CreateBooleanValue(result)); | |
172 SendResponse(true); | |
173 } | |
174 | |
175 void IsRecordingSpeechInputFunction::Run() { | |
176 SpeechInputExtensionManager::GetForProfile(profile())->IsRecording( | |
177 base::Bind(&IsRecordingSpeechInputFunction::SetIsRecordingResult, this)); | |
178 } | |
179 | |
180 bool IsRecordingSpeechInputFunction::RunImpl() { | |
181 // The operation needs to be asynchronous because of thread requirements. | |
182 // This method does nothing, but it needs to be implemented anyway. | |
183 return true; | |
184 } | |
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