dom/midi/MIDIMessageEvent.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/EventBinding.h"
   8 #include "mozilla/dom/MIDIMessageEvent.h"
   9 #include "mozilla/dom/MIDIMessageEventBinding.h"
  10 #include "js/GCAPI.h"
  11 #include "jsfriendapi.h"
  12 #include "mozilla/FloatingPoint.h"
  13 #include "mozilla/HoldDropJSObjects.h"
  14 #include "mozilla/dom/Nullable.h"
  15 #include "mozilla/dom/PrimitiveConversions.h"
  16 #include "mozilla/dom/TypedArray.h"
  17 #include "mozilla/dom/Performance.h"
  18
  19 namespace mozilla::dom {
  20
  21 NS_IMPL_CYCLE_COLLECTION_CLASS(MIDIMessageEvent)
  22
  23 NS_IMPL_ADDREF_INHERITED(MIDIMessageEvent, Event)
  24 NS_IMPL_RELEASE_INHERITED(MIDIMessageEvent, Event)
  25
  26 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MIDIMessageEvent, Event)
  27 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  28
  29 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MIDIMessageEvent, Event)
  30   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData)
  31 NS_IMPL_CYCLE_COLLECTION_TRACE_END
  32
  33 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(MIDIMessageEvent, Event)
  34   tmp->mData = nullptr;
  35 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  36
  37 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIMessageEvent)
  38 NS_INTERFACE_MAP_END_INHERITING(Event)
  39
  40 MIDIMessageEvent::MIDIMessageEvent(mozilla::dom::EventTarget* aOwner)
  41     : Event(aOwner, nullptr, nullptr) {
  42   mozilla::HoldJSObjects(this);
  43 }
  44
  45 MIDIMessageEvent::~MIDIMessageEvent() { mozilla::DropJSObjects(this); }
  46
  47 JSObject* MIDIMessageEvent::WrapObjectInternal(
  48     JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
  49   return MIDIMessageEvent_Binding::Wrap(aCx, this, aGivenProto);
  50 }
  51
  52 MIDIMessageEvent* MIDIMessageEvent::AsMIDIMessageEvent() { return this; }
  53
  54 already_AddRefed<MIDIMessageEvent> MIDIMessageEvent::Constructor(
  55     EventTarget* aOwner, const class TimeStamp& aReceivedTime,
  56     const nsTArray<uint8_t>& aData) {
  57   MOZ_ASSERT(aOwner);
  58   RefPtr<MIDIMessageEvent> e = new MIDIMessageEvent(aOwner);
  59   e->InitEvent(u"midimessage"_ns, false, false);
  60   e->mEvent->mTimeStamp = aReceivedTime;
  61   e->mRawData = aData.Clone();
  62   e->SetTrusted(true);
  63   return e.forget();
  64 }
  65
  66 already_AddRefed<MIDIMessageEvent> MIDIMessageEvent::Constructor(
  67     const GlobalObject& aGlobal, const nsAString& aType,
  68     const MIDIMessageEventInit& aEventInitDict, ErrorResult& aRv) {
  69   nsCOMPtr<EventTarget> owner = do_QueryInterface(aGlobal.GetAsSupports());
  70   RefPtr<MIDIMessageEvent> e = new MIDIMessageEvent(owner);
  71   bool trusted = e->Init(owner);
  72   e->InitEvent(aType, aEventInitDict.mBubbles, aEventInitDict.mCancelable);
  73   // Set data for event. Timestamp will always be set to Now() (default for
  74   // event) using this constructor.
  75   const auto& a = aEventInitDict.mData.Value();
  76   a.ComputeState();
  77   e->mData = Uint8Array::Create(aGlobal.Context(), owner, a.Length(), a.Data());
  78   if (NS_WARN_IF(!e->mData)) {
  79     aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
  80     return nullptr;
  81   }
  82
  83   e->SetTrusted(trusted);
  84   mozilla::HoldJSObjects(e.get());
  85   return e.forget();
  86 }
  87
  88 void MIDIMessageEvent::GetData(JSContext* cx,
  89                                JS::MutableHandle<JSObject*> aData,
  90                                ErrorResult& aRv) {
  91   if (!mData) {
  92     mData =
  93         Uint8Array::Create(cx, this, mRawData.Length(), mRawData.Elements());
  94     if (!mData) {
  95       aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
  96       return;
  97     }
  98     mRawData.Clear();
  99   }
 100   aData.set(mData);
 101 }
 102
 103 }  // namespace mozilla::dom