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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/modules/speech/speech_recognition.h"
#include "third_party/blink/renderer/bindings/core/v8/exception_state.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/exception_code.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/modules/speech/speech_recognition_controller.h"
#include "third_party/blink/renderer/modules/speech/speech_recognition_error.h"
#include "third_party/blink/renderer/modules/speech/speech_recognition_event.h"
namespace blink {
SpeechRecognition* SpeechRecognition::Create(ExecutionContext* context) {
DCHECK(context);
DCHECK(context->IsDocument());
Document* document = ToDocument(context);
DCHECK(document);
return new SpeechRecognition(document->GetFrame(), context);
}
void SpeechRecognition::start(ExceptionState& exception_state) {
if (!controller_)
return;
if (started_) {
exception_state.ThrowDOMException(kInvalidStateError,
"recognition has already started.");
return;
}
final_results_.clear();
controller_->Start(this, grammars_, lang_, continuous_, interim_results_,
max_alternatives_);
started_ = true;
}
void SpeechRecognition::stopFunction() {
if (!controller_)
return;
if (started_ && !stopping_) {
stopping_ = true;
controller_->Stop(this);
}
}
void SpeechRecognition::abort() {
if (!controller_)
return;
if (started_ && !stopping_) {
stopping_ = true;
controller_->Abort(this);
}
}
void SpeechRecognition::DidStartAudio() {
DispatchEvent(Event::Create(EventTypeNames::audiostart));
}
void SpeechRecognition::DidStartSound() {
DispatchEvent(Event::Create(EventTypeNames::soundstart));
}
void SpeechRecognition::DidStartSpeech() {
DispatchEvent(Event::Create(EventTypeNames::speechstart));
}
void SpeechRecognition::DidEndSpeech() {
DispatchEvent(Event::Create(EventTypeNames::speechend));
}
void SpeechRecognition::DidEndSound() {
DispatchEvent(Event::Create(EventTypeNames::soundend));
}
void SpeechRecognition::DidEndAudio() {
DispatchEvent(Event::Create(EventTypeNames::audioend));
}
void SpeechRecognition::DidReceiveResults(
const HeapVector<Member<SpeechRecognitionResult>>& new_final_results,
const HeapVector<Member<SpeechRecognitionResult>>&
current_interim_results) {
size_t result_index = final_results_.size();
for (size_t i = 0; i < new_final_results.size(); ++i)
final_results_.push_back(new_final_results[i]);
HeapVector<Member<SpeechRecognitionResult>> results = final_results_;
for (size_t i = 0; i < current_interim_results.size(); ++i)
results.push_back(current_interim_results[i]);
DispatchEvent(SpeechRecognitionEvent::CreateResult(result_index, results));
}
void SpeechRecognition::DidReceiveNoMatch(SpeechRecognitionResult* result) {
DispatchEvent(SpeechRecognitionEvent::CreateNoMatch(result));
}
void SpeechRecognition::DidReceiveError(SpeechRecognitionError* error) {
DispatchEvent(error);
started_ = false;
}
void SpeechRecognition::DidStart() {
DispatchEvent(Event::Create(EventTypeNames::start));
}
void SpeechRecognition::DidEnd() {
started_ = false;
stopping_ = false;
// If m_controller is null, this is being aborted from the ExecutionContext
// being detached, so don't dispatch an event.
if (controller_)
DispatchEvent(Event::Create(EventTypeNames::end));
}
const AtomicString& SpeechRecognition::InterfaceName() const {
return EventTargetNames::SpeechRecognition;
}
ExecutionContext* SpeechRecognition::GetExecutionContext() const {
return ContextLifecycleObserver::GetExecutionContext();
}
void SpeechRecognition::ContextDestroyed(ExecutionContext*) {
controller_ = nullptr;
if (HasPendingActivity())
abort();
}
bool SpeechRecognition::HasPendingActivity() const {
return started_;
}
SpeechRecognition::SpeechRecognition(LocalFrame* frame,
ExecutionContext* context)
: ContextLifecycleObserver(context),
grammars_(SpeechGrammarList::Create()), // FIXME: The spec is not clear
// on the default value for the
// grammars attribute.
continuous_(false),
interim_results_(false),
max_alternatives_(1),
controller_(SpeechRecognitionController::From(frame)),
started_(false),
stopping_(false) {
// FIXME: Need to hook up to get notified when the visibility changes.
}
SpeechRecognition::~SpeechRecognition() = default;
void SpeechRecognition::Trace(blink::Visitor* visitor) {
visitor->Trace(grammars_);
visitor->Trace(controller_);
visitor->Trace(final_results_);
EventTargetWithInlineData::Trace(visitor);
ContextLifecycleObserver::Trace(visitor);
}
} // namespace blink
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