mirror of
https://github.com/mozilla/gecko-dev.git
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103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/MIDIInput.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/MIDIPortChild.h"
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#include "mozilla/dom/MIDIInputBinding.h"
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#include "mozilla/dom/MIDIMessageEvent.h"
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#include "mozilla/dom/MIDIMessageEventBinding.h"
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#include "nsDOMNavigationTiming.h"
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#include "MIDILog.h"
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namespace mozilla::dom {
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MIDIInput::MIDIInput(nsPIDOMWindowInner* aWindow, MIDIAccess* aMIDIAccessParent)
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: MIDIPort(aWindow, aMIDIAccessParent), mKeepAlive(false) {}
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// static
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MIDIInput* MIDIInput::Create(nsPIDOMWindowInner* aWindow,
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MIDIAccess* aMIDIAccessParent,
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const MIDIPortInfo& aPortInfo,
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const bool aSysexEnabled) {
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MOZ_ASSERT(static_cast<MIDIPortType>(aPortInfo.type()) ==
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MIDIPortType::Input);
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auto* port = new MIDIInput(aWindow, aMIDIAccessParent);
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if (!port->Initialize(aPortInfo, aSysexEnabled)) {
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return nullptr;
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}
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return port;
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}
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JSObject* MIDIInput::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return MIDIInput_Binding::Wrap(aCx, this, aGivenProto);
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}
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void MIDIInput::Receive(const nsTArray<MIDIMessage>& aMsgs) {
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if (!GetOwner()) {
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return; // Ignore messages once we've been disconnected from the owner
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}
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nsCOMPtr<Document> doc = GetOwner()->GetDoc();
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if (!doc) {
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NS_WARNING("No document available to send MIDIMessageEvent to!");
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return;
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}
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for (const auto& msg : aMsgs) {
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RefPtr<MIDIMessageEvent> event(
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MIDIMessageEvent::Constructor(this, msg.timestamp(), msg.data()));
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DispatchTrustedEvent(event);
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}
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}
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void MIDIInput::StateChange() {
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if (Port()->ConnectionState() == MIDIPortConnectionState::Open ||
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(Port()->DeviceState() == MIDIPortDeviceState::Connected &&
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Port()->ConnectionState() == MIDIPortConnectionState::Pending)) {
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KeepAliveOnMidimessage();
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} else {
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DontKeepAliveOnMidimessage();
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}
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}
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void MIDIInput::EventListenerAdded(nsAtom* aType) {
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if (aType == nsGkAtoms::onmidimessage) {
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// HACK: the Web MIDI spec states that we should open a port only when
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// setting the midimessage event handler but Chrome does it even when
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// adding event listeners hence this.
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if (Port()->ConnectionState() != MIDIPortConnectionState::Open) {
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LOG("onmidimessage event listener added, sending implicit Open");
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Port()->SendOpen();
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}
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}
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DOMEventTargetHelper::EventListenerAdded(aType);
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}
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void MIDIInput::DisconnectFromOwner() {
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DontKeepAliveOnMidimessage();
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MIDIPort::DisconnectFromOwner();
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}
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void MIDIInput::KeepAliveOnMidimessage() {
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if (!mKeepAlive) {
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mKeepAlive = true;
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KeepAliveIfHasListenersFor(nsGkAtoms::onmidimessage);
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}
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}
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void MIDIInput::DontKeepAliveOnMidimessage() {
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if (mKeepAlive) {
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IgnoreKeepAliveIfHasListenersFor(nsGkAtoms::onmidimessage);
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mKeepAlive = false;
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}
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}
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} // namespace mozilla::dom
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