diff options
Diffstat (limited to 'dom/midi/MIDIPort.cpp')
| -rw-r--r-- | dom/midi/MIDIPort.cpp | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/dom/midi/MIDIPort.cpp b/dom/midi/MIDIPort.cpp new file mode 100644 index 0000000000..8e1fbb62cc --- /dev/null +++ b/dom/midi/MIDIPort.cpp @@ -0,0 +1,284 @@ +/* -*- 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/MIDIPort.h" +#include "mozilla/dom/MIDIConnectionEvent.h" +#include "mozilla/dom/MIDIPortChild.h" +#include "mozilla/dom/MIDIAccess.h" +#include "mozilla/dom/MIDITypes.h" +#include "mozilla/ipc/Endpoint.h" +#include "mozilla/ipc/PBackgroundChild.h" +#include "mozilla/ipc/BackgroundChild.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/Unused.h" +#include "nsContentUtils.h" +#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, MOZ_COUNT_DTOR +#include "MIDILog.h" + +using namespace mozilla::ipc; + +namespace mozilla::dom { + +NS_IMPL_CYCLE_COLLECTION_INHERITED(MIDIPort, DOMEventTargetHelper, + mOpeningPromise, mClosingPromise) + +NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MIDIPort, DOMEventTargetHelper) +NS_IMPL_CYCLE_COLLECTION_TRACE_END + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIPort) + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY +NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper) + +NS_IMPL_ADDREF_INHERITED(MIDIPort, DOMEventTargetHelper) +NS_IMPL_RELEASE_INHERITED(MIDIPort, DOMEventTargetHelper) + +MIDIPort::MIDIPort(nsPIDOMWindowInner* aWindow) + : DOMEventTargetHelper(aWindow), + mMIDIAccessParent(nullptr), + mKeepAlive(false) { + MOZ_ASSERT(aWindow); + + Document* aDoc = GetOwner()->GetExtantDoc(); + if (aDoc) { + aDoc->DisallowBFCaching(); + } +} + +MIDIPort::~MIDIPort() { + if (mMIDIAccessParent) { + mMIDIAccessParent->RemovePortListener(this); + mMIDIAccessParent = nullptr; + } + if (Port()) { + // If the IPC port channel is still alive at this point, it means we're + // probably CC'ing this port object. Send the shutdown message to also clean + // up the IPC channel. + Port()->SendShutdown(); + } +} + +bool MIDIPort::Initialize(const MIDIPortInfo& aPortInfo, bool aSysexEnabled, + MIDIAccess* aMIDIAccessParent) { + MOZ_ASSERT(aMIDIAccessParent); + nsCOMPtr<Document> document = GetDocumentIfCurrent(); + if (!document) { + return false; + } + + nsCOMPtr<nsIURI> uri = document->GetDocumentURI(); + if (!uri) { + return false; + } + + nsAutoCString origin; + nsresult rv = nsContentUtils::GetASCIIOrigin(uri, origin); + if (NS_FAILED(rv)) { + return false; + } + RefPtr<MIDIPortChild> port = + new MIDIPortChild(aPortInfo, aSysexEnabled, this); + if (NS_FAILED(port->GenerateStableId(origin))) { + return false; + } + PBackgroundChild* b = BackgroundChild::GetForCurrentThread(); + MOZ_ASSERT(b, + "Should always have a valid BackgroundChild when creating a port " + "object!"); + + // Create the endpoints and bind the one on the child side. + Endpoint<PMIDIPortParent> parentEndpoint; + Endpoint<PMIDIPortChild> childEndpoint; + MOZ_ALWAYS_SUCCEEDS( + PMIDIPort::CreateEndpoints(&parentEndpoint, &childEndpoint)); + MOZ_ALWAYS_TRUE(childEndpoint.Bind(port)); + + if (!b->SendCreateMIDIPort(std::move(parentEndpoint), aPortInfo, + aSysexEnabled)) { + return false; + } + + mMIDIAccessParent = aMIDIAccessParent; + mPortHolder.Init(port.forget()); + LOG("MIDIPort::Initialize (%s, %s)", + NS_ConvertUTF16toUTF8(Port()->Name()).get(), + MIDIPortTypeValues::strings[uint32_t(Port()->Type())].value); + return true; +} + +void MIDIPort::UnsetIPCPort() { + LOG("MIDIPort::UnsetIPCPort (%s, %s)", + NS_ConvertUTF16toUTF8(Port()->Name()).get(), + MIDIPortTypeValues::strings[uint32_t(Port()->Type())].value); + mPortHolder.Clear(); +} + +void MIDIPort::GetId(nsString& aRetVal) const { + MOZ_ASSERT(Port()); + aRetVal = Port()->StableId(); +} + +void MIDIPort::GetManufacturer(nsString& aRetVal) const { + MOZ_ASSERT(Port()); + aRetVal = Port()->Manufacturer(); +} + +void MIDIPort::GetName(nsString& aRetVal) const { + MOZ_ASSERT(Port()); + aRetVal = Port()->Name(); +} + +void MIDIPort::GetVersion(nsString& aRetVal) const { + MOZ_ASSERT(Port()); + aRetVal = Port()->Version(); +} + +MIDIPortType MIDIPort::Type() const { + MOZ_ASSERT(Port()); + return Port()->Type(); +} + +MIDIPortConnectionState MIDIPort::Connection() const { + MOZ_ASSERT(Port()); + return Port()->ConnectionState(); +} + +MIDIPortDeviceState MIDIPort::State() const { + MOZ_ASSERT(Port()); + return Port()->DeviceState(); +} + +bool MIDIPort::SysexEnabled() const { + MOZ_ASSERT(Port()); + return Port()->SysexEnabled(); +} + +already_AddRefed<Promise> MIDIPort::Open(ErrorResult& aError) { + LOG("MIDIPort::Open"); + MOZ_ASSERT(Port()); + RefPtr<Promise> p; + if (mOpeningPromise) { + p = mOpeningPromise; + return p.forget(); + } + nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(GetOwner()); + p = Promise::Create(go, aError); + if (aError.Failed()) { + return nullptr; + } + mOpeningPromise = p; + Port()->SendOpen(); + return p.forget(); +} + +already_AddRefed<Promise> MIDIPort::Close(ErrorResult& aError) { + LOG("MIDIPort::Close"); + MOZ_ASSERT(Port()); + RefPtr<Promise> p; + if (mClosingPromise) { + p = mClosingPromise; + return p.forget(); + } + nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(GetOwner()); + p = Promise::Create(go, aError); + if (aError.Failed()) { + return nullptr; + } + mClosingPromise = p; + Port()->SendClose(); + return p.forget(); +} + +void MIDIPort::Notify(const void_t& aVoid) { + LOG("MIDIPort::notify MIDIAccess shutting down, dropping reference."); + // If we're getting notified, it means the MIDIAccess parent object is dead. + // Nullify our copy. + mMIDIAccessParent = nullptr; +} + +void MIDIPort::FireStateChangeEvent() { + if (!GetOwner()) { + return; // Ignore changes once we've been disconnected from the owner + } + + StateChange(); + + MOZ_ASSERT(Port()); + if (Port()->ConnectionState() == MIDIPortConnectionState::Open || + Port()->ConnectionState() == MIDIPortConnectionState::Pending) { + if (mOpeningPromise) { + mOpeningPromise->MaybeResolve(this); + mOpeningPromise = nullptr; + } + } else if (Port()->ConnectionState() == MIDIPortConnectionState::Closed) { + if (mOpeningPromise) { + mOpeningPromise->MaybeReject(NS_ERROR_DOM_INVALID_ACCESS_ERR); + mOpeningPromise = nullptr; + } + if (mClosingPromise) { + mClosingPromise->MaybeResolve(this); + mClosingPromise = nullptr; + } + } + + if (Port()->DeviceState() == MIDIPortDeviceState::Connected && + Port()->ConnectionState() == MIDIPortConnectionState::Pending) { + Port()->SendOpen(); + } + + if (Port()->ConnectionState() == MIDIPortConnectionState::Open || + (Port()->DeviceState() == MIDIPortDeviceState::Connected && + Port()->ConnectionState() == MIDIPortConnectionState::Pending)) { + KeepAliveOnStatechange(); + } else { + DontKeepAliveOnStatechange(); + } + + // Fire MIDIAccess events first so that the port is no longer in the port + // maps. + if (mMIDIAccessParent) { + mMIDIAccessParent->FireConnectionEvent(this); + } + + MIDIConnectionEventInit init; + init.mPort = this; + RefPtr<MIDIConnectionEvent> event( + MIDIConnectionEvent::Constructor(this, u"statechange"_ns, init)); + DispatchTrustedEvent(event); +} + +void MIDIPort::StateChange() {} + +void MIDIPort::Receive(const nsTArray<MIDIMessage>& aMsg) { + MOZ_CRASH("We should never get here!"); +} + +void MIDIPort::DisconnectFromOwner() { + if (Port()) { + Port()->SendClose(); + } + DontKeepAliveOnStatechange(); + + DOMEventTargetHelper::DisconnectFromOwner(); +} + +void MIDIPort::KeepAliveOnStatechange() { + if (!mKeepAlive) { + mKeepAlive = true; + KeepAliveIfHasListenersFor(nsGkAtoms::onstatechange); + } +} + +void MIDIPort::DontKeepAliveOnStatechange() { + if (mKeepAlive) { + IgnoreKeepAliveIfHasListenersFor(nsGkAtoms::onstatechange); + mKeepAlive = false; + } +} + +const nsString& MIDIPort::StableId() { return Port()->StableId(); } + +} // namespace mozilla::dom |