Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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