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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 "mozilla/dom/MIDIInput.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/MIDIPortChild.h"
#include "mozilla/dom/MIDIInputBinding.h"
#include "mozilla/dom/MIDIMessageEvent.h"
#include "mozilla/dom/MIDIMessageEventBinding.h"
#include "MIDILog.h"
namespace mozilla::dom {
MIDIInput::MIDIInput(nsPIDOMWindowInner* aWindow)
: MIDIPort(aWindow), mKeepAlive(false) {}
// static
RefPtr<MIDIInput> MIDIInput::Create(nsPIDOMWindowInner* aWindow,
MIDIAccess* aMIDIAccessParent,
const MIDIPortInfo& aPortInfo,
const bool aSysexEnabled) {
MOZ_ASSERT(static_cast<MIDIPortType>(aPortInfo.type()) ==
MIDIPortType::Input);
RefPtr<MIDIInput> port = new MIDIInput(aWindow);
if (!port->Initialize(aPortInfo, aSysexEnabled, aMIDIAccessParent)) {
return nullptr;
}
return port;
}
JSObject* MIDIInput::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return MIDIInput_Binding::Wrap(aCx, this, aGivenProto);
}
void MIDIInput::Receive(const nsTArray<MIDIMessage>& aMsgs) {
if (!GetOwner()) {
return; // Ignore messages once we've been disconnected from the owner
}
nsCOMPtr<Document> doc = GetOwner()->GetDoc();
if (!doc) {
NS_WARNING("No document available to send MIDIMessageEvent to!");
return;
}
for (const auto& msg : aMsgs) {
RefPtr<MIDIMessageEvent> event(
MIDIMessageEvent::Constructor(this, msg.timestamp(), msg.data()));
DispatchTrustedEvent(event);
}
}
void MIDIInput::StateChange() {
if (Port()->ConnectionState() == MIDIPortConnectionState::Open ||
(Port()->DeviceState() == MIDIPortDeviceState::Connected &&
Port()->ConnectionState() == MIDIPortConnectionState::Pending)) {
KeepAliveOnMidimessage();
} else {
DontKeepAliveOnMidimessage();
}
}
void MIDIInput::EventListenerAdded(nsAtom* aType) {
if (aType == nsGkAtoms::onmidimessage) {
// HACK: the Web MIDI spec states that we should open a port only when
// setting the midimessage event handler but Chrome does it even when
// adding event listeners hence this.
if (Port()->ConnectionState() != MIDIPortConnectionState::Open) {
LOG("onmidimessage event listener added, sending implicit Open");
Port()->SendOpen();
}
}
DOMEventTargetHelper::EventListenerAdded(aType);
}
void MIDIInput::DisconnectFromOwner() {
DontKeepAliveOnMidimessage();
MIDIPort::DisconnectFromOwner();
}
void MIDIInput::KeepAliveOnMidimessage() {
if (!mKeepAlive) {
mKeepAlive = true;
KeepAliveIfHasListenersFor(nsGkAtoms::onmidimessage);
}
}
void MIDIInput::DontKeepAliveOnMidimessage() {
if (mKeepAlive) {
IgnoreKeepAliveIfHasListenersFor(nsGkAtoms::onmidimessage);
mKeepAlive = false;
}
}
} // namespace mozilla::dom
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