Quelle  SpeechSynthesisUtterance.cpp   Sprache: C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsGkAtoms.h"

#include "mozilla/dom/SpeechSynthesisEvent.h"
#include "mozilla/dom/SpeechSynthesisUtteranceBinding.h"
#include "SpeechSynthesisUtterance.h"
#include "SpeechSynthesisVoice.h"

#include <stdlib.h>

namespace mozilla::dom {

NS_IMPL_CYCLE_COLLECTION_INHERITED(SpeechSynthesisUtterance,
                                   DOMEventTargetHelper, mVoice);

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SpeechSynthesisUtterance)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)

NS_IMPL_ADDREF_INHERITED(SpeechSynthesisUtterance, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(SpeechSynthesisUtterance, DOMEventTargetHelper)

SpeechSynthesisUtterance::SpeechSynthesisUtterance(
    nsPIDOMWindowInner* aOwnerWindow, const nsAString& text)
    : DOMEventTargetHelper(aOwnerWindow),
      mText(text),
      mVolume(1),
      mRate(1),
      mPitch(1),
      mPaused(false),
      mShouldResistFingerprinting(
          aOwnerWindow->AsGlobal()->ShouldResistFingerprinting(
              RFPTarget::SpeechSynthesis)) {}

SpeechSynthesisUtterance::~SpeechSynthesisUtterance() = default;

JSObject* SpeechSynthesisUtterance::WrapObject(
    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
  return SpeechSynthesisUtterance_Binding::Wrap(aCx, this, aGivenProto);
}

nsISupports* SpeechSynthesisUtterance::GetParentObject() const {
  return GetOwnerGlobal();
}

already_AddRefed<SpeechSynthesisUtterance>
SpeechSynthesisUtterance::Constructor(GlobalObject& aGlobal, ErrorResult& aRv) {
  return Constructor(aGlobal, u""_ns, aRv);
}

already_AddRefed<SpeechSynthesisUtterance>
SpeechSynthesisUtterance::Constructor(GlobalObject& aGlobal,
                                      const nsAString& aText,
                                      ErrorResult& aRv) {
  nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(aGlobal.GetAsSupports());

  if (!win) {
    aRv.Throw(NS_ERROR_FAILURE);
    return nullptr;
  }

  RefPtr<SpeechSynthesisUtterance> object =
      new SpeechSynthesisUtterance(win, aText);
  return object.forget();
}

void SpeechSynthesisUtterance::GetText(nsString& aResult) const {
  aResult = mText;
}

void SpeechSynthesisUtterance::SetText(const nsAString& aText) {
  mText = aText;
}

void SpeechSynthesisUtterance::GetLang(nsString& aResult) const {
  aResult = mLang;
}

void SpeechSynthesisUtterance::SetLang(const nsAString& aLang) {
  mLang = aLang;
}

SpeechSynthesisVoice* SpeechSynthesisUtterance::GetVoice() const {
  return mVoice;
}

void SpeechSynthesisUtterance::SetVoice(SpeechSynthesisVoice* aVoice) {
  mVoice = aVoice;
}

float SpeechSynthesisUtterance::Volume() const { return mVolume; }

void SpeechSynthesisUtterance::SetVolume(float aVolume) {
  mVolume = std::max<float>(std::min<float>(aVolume, 1), 0);
}

float SpeechSynthesisUtterance::Rate() const { return mRate; }

void SpeechSynthesisUtterance::SetRate(float aRate) {
  mRate = std::max<float>(std::min<float>(aRate, 10), 0.1f);
}

float SpeechSynthesisUtterance::Pitch() const { return mPitch; }

void SpeechSynthesisUtterance::SetPitch(float aPitch) {
  mPitch = std::max<float>(std::min<float>(aPitch, 2), 0);
}

void SpeechSynthesisUtterance::GetChosenVoiceURI(nsString& aResult) const {
  aResult = mChosenVoiceURI;
}

void SpeechSynthesisUtterance::DispatchSpeechSynthesisEvent(
    const nsAString& aEventType, uint32_t aCharIndex,
    const Nullable<uint32_t>& aCharLength, float aElapsedTime,
    const nsAString& aName) {
  SpeechSynthesisEventInit init;
  init.mBubbles = false;
  init.mCancelable = false;
  init.mUtterance = this;
  init.mCharIndex = aCharIndex;
  init.mCharLength = aCharLength;
  init.mElapsedTime = aElapsedTime;
  init.mName = aName;

  RefPtr<SpeechSynthesisEvent> event =
      SpeechSynthesisEvent::Constructor(this, aEventType, init);
  DispatchTrustedEvent(event);
}

}  // namespace mozilla::dom