MIDIMessageEvent.cpp

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/* -*- 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 "js/Realm.h"

#include "mozilla/dom/EventBinding.h"

#include "mozilla/dom/MIDIMessageEvent.h"

#include "mozilla/dom/MIDIMessageEventBinding.h"

#include "js/GCAPI.h"

#include "jsfriendapi.h"

#include "mozilla/FloatingPoint.h"

#include "mozilla/HoldDropJSObjects.h"

#include "mozilla/dom/Nullable.h"

#include "mozilla/dom/PrimitiveConversions.h"

#include "mozilla/dom/TypedArray.h"

#include "mozilla/dom/Performance.h"

namespace mozilla::dom {

NS_IMPL_CYCLE_COLLECTION_INHERITED_WITH_JS_MEMBERS(MIDIMessageEvent, Event, (),

                                                   (mData))

NS_IMPL_ADDREF_INHERITED(MIDIMessageEvent, Event)

NS_IMPL_RELEASE_INHERITED(MIDIMessageEvent, Event)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIMessageEvent)

NS_INTERFACE_MAP_END_INHERITING(Event)

MIDIMessageEvent::MIDIMessageEvent(mozilla::dom::EventTarget* aOwner)

    : Event(aOwner, nullptr, nullptr) {

  mozilla::HoldJSObjects(this);

MIDIMessageEvent::~MIDIMessageEvent() { mozilla::DropJSObjects(this); }

JSObject* MIDIMessageEvent::WrapObjectInternal(

    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {

  return MIDIMessageEvent_Binding::Wrap(aCx, this, aGivenProto);

MIDIMessageEvent* MIDIMessageEvent::AsMIDIMessageEvent() { return this; }

already_AddRefed<MIDIMessageEvent> MIDIMessageEvent::Constructor(

    EventTarget* aOwner, const class TimeStamp& aReceivedTime,

    const nsTArray<uint8_t>& aData) {

  MOZ_ASSERT(aOwner);

  RefPtr<MIDIMessageEvent> e = new MIDIMessageEvent(aOwner);

  e->InitEvent(u"midimessage"_ns, false, false);

  e->mEvent->mTimeStamp = aReceivedTime;

  e->mRawData = aData.Clone();

  e->SetTrusted(true);

  return e.forget();

already_AddRefed<MIDIMessageEvent> MIDIMessageEvent::Constructor(

    const GlobalObject& aGlobal, const nsAString& aType,

    const MIDIMessageEventInit& aEventInitDict, ErrorResult& aRv) {

  nsCOMPtr<EventTarget> owner = do_QueryInterface(aGlobal.GetAsSupports());

  RefPtr<MIDIMessageEvent> e = new MIDIMessageEvent(owner);

  bool trusted = e->Init(owner);

  e->InitEvent(aType, aEventInitDict.mBubbles, aEventInitDict.mCancelable);

  // Set data for event. Timestamp will always be set to Now() (default for

  // event) using this constructor.

  if (aEventInitDict.mData.WasPassed()) {

    JSAutoRealm ar(aGlobal.Context(), aGlobal.Get());

    JS::Rooted<JSObject*> data(aGlobal.Context(),

                               aEventInitDict.mData.Value().Obj());

    e->mData = JS_NewUint8ArrayFromArray(aGlobal.Context(), data);

    if (NS_WARN_IF(!e->mData)) {

      aRv.Throw(NS_ERROR_OUT_OF_MEMORY);

      return nullptr;

  e->SetTrusted(trusted);

  mozilla::HoldJSObjects(e.get());

  return e.forget();

void MIDIMessageEvent::GetData(JSContext* cx,

                               JS::MutableHandle<JSObject*> aData,

                               ErrorResult& aRv) {

  if (!mData) {

    mData = Uint8Array::Create(cx, this, mRawData, aRv);

    if (aRv.Failed()) {

      return;

    mRawData.Clear();

  aData.set(mData);

}  // namespace mozilla::dom