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// Copyright (c) 2012 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.
#include "chrome/browser/speech/speech_input_extension_api.h"
#include "base/bind.h"
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/speech/speech_input_extension_manager.h"
#include "chrome/common/chrome_notification_types.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
using content::BrowserThread;
namespace {
const char kLanguageKey[] = "language";
const char kGrammarKey[] = "grammar";
const char kFilterProfanitiesKey[] = "filterProfanities";
const char kDefaultGrammar[] = "builtin:dictation";
const bool kDefaultFilterProfanities = true;
} // anonymous namespace
SpeechInputAsyncFunction::SpeechInputAsyncFunction(
int start_state,
int transition_state,
int end_state,
int transition_notification)
: start_state_(start_state),
transition_state_(transition_state),
end_state_(end_state),
transition_notification_(transition_notification),
expecting_transition_(false),
failed_(false) {
registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_FAILED,
content::Source<Profile>(profile()));
}
SpeechInputAsyncFunction::~SpeechInputAsyncFunction() {}
void SpeechInputAsyncFunction::Run() {
if (failed_) {
registrar_.RemoveAll();
SendResponse(false);
return;
}
SpeechInputExtensionManager::State state =
SpeechInputExtensionManager::GetForProfile(profile())->state();
// RunImpl should be always called once independently of the state we're in,
// otherwise we might miss requestDenied error situations.
if (!expecting_transition_) {
SpeechInputExtensionManager::State state_before_call = state;
// Register before RunImpl to ensure it's received if generated.
if (state_before_call == start_state_) {
registrar_.Add(this, transition_notification_,
content::Source<Profile>(profile()));
AddRef(); // Balanced in Observe().
}
if (!RunImpl()) {
registrar_.RemoveAll();
SendResponse(false);
return;
}
// RunImpl should always return false and set the appropriate error code
// when called in a state different to the start one.
DCHECK_EQ(state_before_call, start_state_);
state = SpeechInputExtensionManager::GetForProfile(profile())->state();
DCHECK_EQ(state, transition_state_);
expecting_transition_ = true;
}
if (state == transition_state_)
return;
DCHECK_EQ(state, end_state_);
registrar_.RemoveAll();
SendResponse(true);
}
void SpeechInputAsyncFunction::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK_EQ(profile(), content::Source<Profile>(source).ptr());
if (type == chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_FAILED) {
SpeechInputExtensionManager::ExtensionError* error_details =
content::Details<SpeechInputExtensionManager::ExtensionError>(
details).ptr();
if (error_details->extension_id_ != extension_id())
return;
error_ = error_details->error_;
failed_ = true;
} else {
DCHECK_EQ(type, transition_notification_);
if (*content::Details<std::string>(details).ptr() != extension_id())
return;
DCHECK(expecting_transition_);
}
Run();
Release(); // Balanced in Run().
}
StartSpeechInputFunction::StartSpeechInputFunction()
: SpeechInputAsyncFunction(SpeechInputExtensionManager::kIdle,
SpeechInputExtensionManager::kStarting,
SpeechInputExtensionManager::kRecording,
chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_RECORDING_STARTED) {
}
bool StartSpeechInputFunction::RunImpl() {
std::string language;
std::string grammar = kDefaultGrammar;
bool filter_profanities = kDefaultFilterProfanities;
if (!args_->empty()) {
DictionaryValue *options;
if (!args_->GetDictionary(0, &options))
return false;
DCHECK(options);
if (options->HasKey(kLanguageKey))
options->GetString(kLanguageKey, &language);
if (options->HasKey(kGrammarKey))
options->GetString(kGrammarKey, &grammar);
if (options->HasKey(kFilterProfanitiesKey)) {
options->GetBoolean(kFilterProfanitiesKey,
&filter_profanities);
}
}
// Use the application locale if the language is empty or not provided.
if (language.empty()) {
language = g_browser_process->GetApplicationLocale();
VLOG(1) << "Language not specified. Using application locale " << language;
}
return SpeechInputExtensionManager::GetForProfile(profile())->Start(
extension_id(), language, grammar, filter_profanities, &error_);
}
StopSpeechInputFunction::StopSpeechInputFunction()
: SpeechInputAsyncFunction(SpeechInputExtensionManager::kRecording,
SpeechInputExtensionManager::kStopping,
SpeechInputExtensionManager::kIdle,
chrome::NOTIFICATION_EXTENSION_SPEECH_INPUT_RECORDING_STOPPED) {
}
bool StopSpeechInputFunction::RunImpl() {
return SpeechInputExtensionManager::GetForProfile(
profile())->Stop(extension_id(), &error_);
}
void IsRecordingSpeechInputFunction::SetResult(bool result) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
result_.reset(Value::CreateBooleanValue(result));
SendResponse(true);
}
void IsRecordingSpeechInputFunction::Run() {
SpeechInputExtensionManager::GetForProfile(profile())->IsRecording(
base::Bind(&IsRecordingSpeechInputFunction::SetResult, this));
}
bool IsRecordingSpeechInputFunction::RunImpl() {
// The operation needs to be asynchronous because of thread requirements.
// This method does nothing, but it needs to be implemented anyway.
return true;
}
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