third_party/blink/renderer/modules/speech/speech_recognition_controller.cc

/*
 * 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_controller.h"

#include <memory>

#include "services/service_manager/public/cpp/interface_provider.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/modules/speech/speech_grammar_list.h"
#include "third_party/blink/renderer/modules/speech/speech_recognition.h"

namespace blink {

const char SpeechRecognitionController::kSupplementName[] =
    "SpeechRecognitionController";

SpeechRecognitionController::SpeechRecognitionController(LocalFrame& frame)
    : Supplement<LocalFrame>(frame) {}

SpeechRecognitionController::~SpeechRecognitionController() {
  // FIXME: Call m_client->pageDestroyed(); once we have implemented a client.
}

SpeechRecognitionController* SpeechRecognitionController::Create(
    LocalFrame& frame) {
  return new SpeechRecognitionController(frame);
}

void SpeechRecognitionController::Start(
    mojom::blink::SpeechRecognitionSessionRequest session_request,
    mojom::blink::SpeechRecognitionSessionClientPtrInfo session_client,
    const SpeechGrammarList* grammars,
    const String& lang,
    bool continuous,
    bool interim_results,
    unsigned long max_alternatives) {
  mojom::blink::StartSpeechRecognitionRequestParamsPtr msg_params =
      mojom::blink::StartSpeechRecognitionRequestParams::New();
  for (unsigned i = 0; i < grammars->length(); i++) {
    SpeechGrammar* grammar = grammars->item(i);
    msg_params->grammars.push_back(mojom::blink::SpeechRecognitionGrammar::New(
        grammar->src(), grammar->weight()));
  }
  msg_params->language = lang.IsNull() ? g_empty_string : lang;
  msg_params->max_hypotheses = max_alternatives;
  msg_params->continuous = continuous;
  msg_params->interim_results = interim_results;
  msg_params->origin = GetSupplementable()->GetDocument()->GetSecurityOrigin();
  msg_params->client = std::move(session_client);
  msg_params->session_request = std::move(session_request);

  GetSpeechRecognizer().Start(std::move(msg_params));
}

void ProvideSpeechRecognitionTo(LocalFrame& frame) {
  SpeechRecognitionController::ProvideTo(
      frame, SpeechRecognitionController::Create(frame));
}

mojom::blink::SpeechRecognizer&
SpeechRecognitionController::GetSpeechRecognizer() {
  if (!speech_recognizer_) {
    GetSupplementable()->GetInterfaceProvider().GetInterface(
        mojo::MakeRequest(&speech_recognizer_));
  }
  return *speech_recognizer_;
}

}  // namespace blink