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/* -*- 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/MIDIPort.h"
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#include "mozilla/dom/MIDIPortChild.h"
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#include "mozilla/dom/MIDIAccess.h"
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#include "mozilla/dom/MIDITypes.h"
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#include "mozilla/ipc/PBackgroundChild.h"
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#include "mozilla/ipc/BackgroundChild.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/MIDITypes.h"
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#include "mozilla/Unused.h"
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#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, MOZ_COUNT_DTOR
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using namespace mozilla::ipc;
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_INHERITED(MIDIPort, DOMEventTargetHelper,
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mOpeningPromise, mClosingPromise)
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MIDIPort, DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIPort)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
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NS_IMPL_ADDREF_INHERITED(MIDIPort, DOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(MIDIPort, DOMEventTargetHelper)
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MIDIPort::MIDIPort(nsPIDOMWindowInner* aWindow, MIDIAccess* aMIDIAccessParent)
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: DOMEventTargetHelper(aWindow), mMIDIAccessParent(aMIDIAccessParent) {
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MOZ_ASSERT(aWindow);
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MOZ_ASSERT(aMIDIAccessParent);
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}
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MIDIPort::~MIDIPort() {
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if (mMIDIAccessParent) {
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mMIDIAccessParent->RemovePortListener(this);
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mMIDIAccessParent = nullptr;
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}
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if (mPort) {
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// If the IPC port channel is still alive at this point, it means we're
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// probably CC'ing this port object. Send the shutdown message to also clean
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// up the IPC channel.
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mPort->SendShutdown();
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// This will unset the IPC Port pointer. Don't call anything after this.
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mPort->Teardown();
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}
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}
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bool MIDIPort::Initialize(const MIDIPortInfo& aPortInfo, bool aSysexEnabled) {
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RefPtr<MIDIPortChild> port =
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new MIDIPortChild(aPortInfo, aSysexEnabled, this);
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PBackgroundChild* b = BackgroundChild::GetForCurrentThread();
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MOZ_ASSERT(b,
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"Should always have a valid BackgroundChild when creating a port "
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"object!");
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if (!b->SendPMIDIPortConstructor(port, aPortInfo, aSysexEnabled)) {
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return false;
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}
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mPort = port;
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// Make sure to increase the ref count for the port, so it can be cleaned up
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// by the IPC manager.
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mPort->SetActorAlive();
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return true;
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}
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void MIDIPort::UnsetIPCPort() { mPort = nullptr; }
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JSObject* MIDIPort::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return MIDIPortBinding::Wrap(aCx, this, aGivenProto);
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}
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void MIDIPort::GetId(nsString& aRetVal) const {
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MOZ_ASSERT(mPort);
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aRetVal = mPort->MIDIPortInterface::Id();
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}
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void MIDIPort::GetManufacturer(nsString& aRetVal) const {
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MOZ_ASSERT(mPort);
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aRetVal = mPort->Manufacturer();
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}
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void MIDIPort::GetName(nsString& aRetVal) const {
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MOZ_ASSERT(mPort);
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aRetVal = mPort->Name();
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}
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void MIDIPort::GetVersion(nsString& aRetVal) const {
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MOZ_ASSERT(mPort);
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aRetVal = mPort->Version();
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}
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MIDIPortType MIDIPort::Type() const {
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MOZ_ASSERT(mPort);
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return mPort->Type();
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}
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MIDIPortConnectionState MIDIPort::Connection() const {
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MOZ_ASSERT(mPort);
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return mPort->ConnectionState();
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}
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MIDIPortDeviceState MIDIPort::State() const {
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MOZ_ASSERT(mPort);
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return mPort->DeviceState();
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}
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bool MIDIPort::SysexEnabled() const {
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MOZ_ASSERT(mPort);
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return mPort->SysexEnabled();
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}
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already_AddRefed<Promise> MIDIPort::Open() {
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MOZ_ASSERT(mPort);
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RefPtr<Promise> p;
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if (mOpeningPromise) {
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p = mOpeningPromise;
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return p.forget();
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}
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ErrorResult rv;
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nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(GetOwner());
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p = Promise::Create(go, rv);
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if (rv.Failed()) {
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return nullptr;
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}
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mOpeningPromise = p;
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mPort->SendOpen();
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return p.forget();
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}
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already_AddRefed<Promise> MIDIPort::Close() {
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MOZ_ASSERT(mPort);
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RefPtr<Promise> p;
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if (mClosingPromise) {
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p = mClosingPromise;
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return p.forget();
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}
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ErrorResult rv;
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nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(GetOwner());
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p = Promise::Create(go, rv);
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if (rv.Failed()) {
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return nullptr;
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}
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mClosingPromise = p;
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mPort->SendClose();
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return p.forget();
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}
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void MIDIPort::Notify(const void_t& aVoid) {
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// If we're getting notified, it means the MIDIAccess parent object is dead.
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// Nullify our copy.
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mMIDIAccessParent = nullptr;
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}
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void MIDIPort::FireStateChangeEvent() {
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MOZ_ASSERT(mPort);
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if (mPort->ConnectionState() == MIDIPortConnectionState::Open ||
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mPort->ConnectionState() == MIDIPortConnectionState::Pending) {
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if (mOpeningPromise) {
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mOpeningPromise->MaybeResolve(this);
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mOpeningPromise = nullptr;
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}
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} else if (mPort->ConnectionState() == MIDIPortConnectionState::Closed) {
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if (mOpeningPromise) {
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mOpeningPromise->MaybeReject(NS_ERROR_DOM_INVALID_ACCESS_ERR);
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mOpeningPromise = nullptr;
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}
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if (mClosingPromise) {
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mClosingPromise->MaybeResolve(this);
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mClosingPromise = nullptr;
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}
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}
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if (mPort->DeviceState() == MIDIPortDeviceState::Connected &&
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mPort->ConnectionState() == MIDIPortConnectionState::Pending) {
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mPort->SendOpen();
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}
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// Fire MIDIAccess events first so that the port is no longer in the port
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// maps.
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if (mMIDIAccessParent) {
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mMIDIAccessParent->FireConnectionEvent(this);
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}
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MIDIConnectionEventInit init;
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init.mPort = this;
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RefPtr<MIDIConnectionEvent> event(MIDIConnectionEvent::Constructor(
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this, NS_LITERAL_STRING("statechange"), init));
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DispatchTrustedEvent(event);
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}
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void MIDIPort::Receive(const nsTArray<MIDIMessage>& aMsg) {
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MOZ_CRASH("We should never get here!");
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}
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} // namespace dom
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} // namespace mozilla
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