Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#include "mozilla/dom/MIDIAccess.h"
#include "mozilla/dom/MIDIAccessManager.h"
#include "mozilla/dom/MIDIPort.h"
#include "mozilla/dom/MIDIAccessBinding.h"
#include "mozilla/dom/MIDIConnectionEvent.h"
#include "mozilla/dom/MIDIOptionsBinding.h"
#include "mozilla/dom/MIDIOutputMapBinding.h"
#include "mozilla/dom/MIDIInputMapBinding.h"
#include "mozilla/dom/MIDIOutputMap.h"
#include "mozilla/dom/MIDIInputMap.h"
#include "mozilla/dom/MIDIOutput.h"
#include "mozilla/dom/MIDIInput.h"
#include "mozilla/dom/MIDITypes.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PContent.h"
#include "mozilla/dom/Document.h"
#include "nsPIDOMWindow.h"
#include "nsGlobalWindowInner.h"
#include "nsContentPermissionHelper.h"
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, MOZ_COUNT_DTOR
#include "ipc/IPCMessageUtils.h"
#include "MIDILog.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(MIDIAccess)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MIDIAccess, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MIDIAccess,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInputMap)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOutputMap)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAccessPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(MIDIAccess,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mInputMap)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mOutputMap)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAccessPromise)
tmp->Shutdown();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIAccess)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(MIDIAccess, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(MIDIAccess, DOMEventTargetHelper)
MIDIAccess::MIDIAccess(nsPIDOMWindowInner* aWindow, bool aSysexEnabled,
Promise* aAccessPromise)
: DOMEventTargetHelper(aWindow),
mInputMap(new MIDIInputMap(aWindow)),
mOutputMap(new MIDIOutputMap(aWindow)),
mSysexEnabled(aSysexEnabled),
mAccessPromise(aAccessPromise),
mHasShutdown(false) {
MOZ_ASSERT(aWindow);
MOZ_ASSERT(aAccessPromise);
KeepAliveIfHasListenersFor(nsGkAtoms::onstatechange);
}
MIDIAccess::~MIDIAccess() { Shutdown(); }
void MIDIAccess::Shutdown() {
LOG("MIDIAccess::Shutdown");
if (mHasShutdown) {
return;
}
mDestructionObservers.Broadcast(void_t());
if (MIDIAccessManager::IsRunning()) {
MIDIAccessManager::Get()->RemoveObserver(this);
}
mHasShutdown = true;
}
void MIDIAccess::FireConnectionEvent(MIDIPort* aPort) {
MOZ_ASSERT(aPort);
MIDIConnectionEventInit init;
init.mPort = aPort;
nsAutoString id;
aPort->GetId(id);
ErrorResult rv;
if (aPort->State() == MIDIPortDeviceState::Disconnected) {
if (aPort->Type() == MIDIPortType::Input && mInputMap->Has(id)) {
MIDIInputMap_Binding::MaplikeHelpers::Delete(mInputMap, aPort->StableId(),
rv);
mInputMap->Remove(id);
} else if (aPort->Type() == MIDIPortType::Output && mOutputMap->Has(id)) {
MIDIOutputMap_Binding::MaplikeHelpers::Delete(mOutputMap,
aPort->StableId(), rv);
mOutputMap->Remove(id);
}
// Check to make sure Has()/Delete() calls haven't failed.
if (NS_WARN_IF(rv.Failed())) {
LOG("Inconsistency during FireConnectionEvent");
return;
}
} else {
// If we receive an event from a port that is not in one of our port maps,
// this means a port that was disconnected has been reconnected, with the
// port owner holding the object during that time, and we should add that
// port object to our maps again.
if (aPort->Type() == MIDIPortType::Input && !mInputMap->Has(id)) {
if (NS_WARN_IF(rv.Failed())) {
LOG("Input port not found");
return;
}
MIDIInputMap_Binding::MaplikeHelpers::Set(
mInputMap, aPort->StableId(), *(static_cast<MIDIInput*>(aPort)), rv);
if (NS_WARN_IF(rv.Failed())) {
LOG("Map Set failed for input port");
return;
}
mInputMap->Insert(id, aPort);
} else if (aPort->Type() == MIDIPortType::Output && mOutputMap->Has(id)) {
if (NS_WARN_IF(rv.Failed())) {
LOG("Output port not found");
return;
}
MIDIOutputMap_Binding::MaplikeHelpers::Set(
mOutputMap, aPort->StableId(), *(static_cast<MIDIOutput*>(aPort)),
rv);
if (NS_WARN_IF(rv.Failed())) {
LOG("Map set failed for output port");
return;
}
mOutputMap->Insert(id, aPort);
}
}
RefPtr<MIDIConnectionEvent> event =
MIDIConnectionEvent::Constructor(this, u"statechange"_ns, init);
DispatchTrustedEvent(event);
}
void MIDIAccess::MaybeCreateMIDIPort(const MIDIPortInfo& aInfo,
ErrorResult& aRv) {
nsAutoString id(aInfo.id());
MIDIPortType type = static_cast<MIDIPortType>(aInfo.type());
RefPtr<MIDIPort> port;
if (type == MIDIPortType::Input) {
if (mInputMap->Has(id) || NS_WARN_IF(aRv.Failed())) {
// We already have the port in our map.
return;
}
port = MIDIInput::Create(GetOwnerWindow(), this, aInfo, mSysexEnabled);
if (NS_WARN_IF(!port)) {
LOG("Couldn't create input port");
aRv.Throw(NS_ERROR_FAILURE);
return;
}
MIDIInputMap_Binding::MaplikeHelpers::Set(
mInputMap, port->StableId(), *(static_cast<MIDIInput*>(port.get())),
aRv);
if (NS_WARN_IF(aRv.Failed())) {
LOG("Coudld't set input port in map");
return;
}
mInputMap->Insert(id, port);
} else if (type == MIDIPortType::Output) {
if (mOutputMap->Has(id) || NS_WARN_IF(aRv.Failed())) {
// We already have the port in our map.
return;
}
port = MIDIOutput::Create(GetOwnerWindow(), this, aInfo, mSysexEnabled);
if (NS_WARN_IF(!port)) {
LOG("Couldn't create output port");
aRv.Throw(NS_ERROR_FAILURE);
return;
}
MIDIOutputMap_Binding::MaplikeHelpers::Set(
mOutputMap, port->StableId(), *(static_cast<MIDIOutput*>(port.get())),
aRv);
if (NS_WARN_IF(aRv.Failed())) {
LOG("Coudld't set output port in map");
return;
}
mOutputMap->Insert(id, port);
} else {
// If we hit this, then we have some port that is neither input nor output.
// That is bad.
MOZ_CRASH("We shouldn't be here!");
}
// Set up port to listen for destruction of this access object.
mDestructionObservers.AddObserver(port);
// If we haven't resolved the promise for handing the MIDIAccess object to
// content, this means we're still populating the list of already connected
// devices. Don't fire events yet.
if (!mAccessPromise) {
FireConnectionEvent(port);
}
}
// For the MIDIAccess object, only worry about new connections, where we create
// MIDIPort objects. When a port is removed and the MIDIPortRemove event is
// received, that will be handled by the MIDIPort object itself, and it will
// request removal from MIDIAccess's maps.
void MIDIAccess::Notify(const MIDIPortList& aEvent) {
LOG("MIDIAcess::Notify");
if (!GetOwnerWindow()) {
// Do nothing if we've already been disconnected from the document.
return;
}
for (const auto& port : aEvent.ports()) {
// Something went very wrong. Warn and return.
ErrorResult rv;
MaybeCreateMIDIPort(port, rv);
if (rv.Failed()) {
if (!mAccessPromise) {
// We can't reject the promise so let's suppress the error instead
rv.SuppressException();
return;
}
mAccessPromise->MaybeReject(std::move(rv));
mAccessPromise = nullptr;
}
}
if (!mAccessPromise) {
return;
}
mAccessPromise->MaybeResolve(this);
mAccessPromise = nullptr;
}
JSObject* MIDIAccess::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return MIDIAccess_Binding::Wrap(aCx, this, aGivenProto);
}
void MIDIAccess::RemovePortListener(MIDIAccessDestructionObserver* aObs) {
mDestructionObservers.RemoveObserver(aObs);
}
void MIDIAccess::DisconnectFromOwner() {
IgnoreKeepAliveIfHasListenersFor(nsGkAtoms::onstatechange);
DOMEventTargetHelper::DisconnectFromOwner();
MIDIAccessManager::Get()->SendRefresh();
}
} // namespace mozilla::dom