1 files changed, 151 insertions, 0 deletions
diff --git a/dom/webauthn/WebAuthnManagerBase.cpp b/dom/webauthn/WebAuthnManagerBase.cpp
new file mode 100644
index 0000000000..ee46d7b1b2
--- /dev/null
+++ b/dom/webauthn/WebAuthnManagerBase.cpp
@@ -0,0 +1,151 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/WebAuthnManagerBase.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/WebAuthnTransactionChild.h"
+#include "mozilla/ipc/BackgroundChild.h"
+#include "mozilla/ipc/PBackgroundChild.h"
+#include "mozilla/dom/Event.h"
+#include "nsGlobalWindowInner.h"
+#include "nsPIWindowRoot.h"
+
+namespace mozilla::dom {
+
+constexpr auto kDeactivateEvent = u"deactivate"_ns;
+constexpr auto kVisibilityChange = u"visibilitychange"_ns;
+
+WebAuthnManagerBase::WebAuthnManagerBase(nsPIDOMWindowInner* aParent)
+    : mParent(aParent) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aParent);
+}
+
+WebAuthnManagerBase::~WebAuthnManagerBase() { MOZ_ASSERT(NS_IsMainThread()); }
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WebAuthnManagerBase)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION(WebAuthnManagerBase, mParent)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(WebAuthnManagerBase)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(WebAuthnManagerBase)
+
+/***********************************************************************
+ * IPC Protocol Implementation
+ **********************************************************************/
+
+bool WebAuthnManagerBase::MaybeCreateBackgroundActor() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (mChild) {
+    return true;
+  }
+
+  ::mozilla::ipc::PBackgroundChild* actorChild =
+      ::mozilla::ipc::BackgroundChild::GetOrCreateForCurrentThread();
+  if (NS_WARN_IF(!actorChild)) {
+    return false;
+  }
+
+  RefPtr<WebAuthnTransactionChild> mgr(new WebAuthnTransactionChild(this));
+  PWebAuthnTransactionChild* constructedMgr =
+      actorChild->SendPWebAuthnTransactionConstructor(mgr);
+
+  if (NS_WARN_IF(!constructedMgr)) {
+    return false;
+  }
+
+  MOZ_ASSERT(constructedMgr == mgr);
+  mChild = std::move(mgr);
+
+  return true;
+}
+
+void WebAuthnManagerBase::ActorDestroyed() {
+  MOZ_ASSERT(NS_IsMainThread());
+  mChild = nullptr;
+}
+
+/***********************************************************************
+ * Event Handling
+ **********************************************************************/
+
+void WebAuthnManagerBase::ListenForVisibilityEvents() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsCOMPtr<nsPIDOMWindowOuter> outer = mParent->GetOuterWindow();
+  if (NS_WARN_IF(!outer)) {
+    return;
+  }
+
+  nsCOMPtr<EventTarget> windowRoot = outer->GetTopWindowRoot();
+  if (NS_WARN_IF(!windowRoot)) {
+    return;
+  }
+
+  nsresult rv = windowRoot->AddEventListener(kDeactivateEvent, this,
+                                             /* use capture */ true,
+                                             /* wants untrusted */ false);
+  Unused << NS_WARN_IF(NS_FAILED(rv));
+
+  rv = windowRoot->AddEventListener(kVisibilityChange, this,
+                                    /* use capture */ true,
+                                    /* wants untrusted */ false);
+  Unused << NS_WARN_IF(NS_FAILED(rv));
+}
+
+void WebAuthnManagerBase::StopListeningForVisibilityEvents() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsCOMPtr<nsPIDOMWindowOuter> outer = mParent->GetOuterWindow();
+  if (NS_WARN_IF(!outer)) {
+    return;
+  }
+
+  nsCOMPtr<EventTarget> windowRoot = outer->GetTopWindowRoot();
+  if (NS_WARN_IF(!windowRoot)) {
+    return;
+  }
+
+  windowRoot->RemoveEventListener(kDeactivateEvent, this,
+                                  /* use capture */ true);
+  windowRoot->RemoveEventListener(kVisibilityChange, this,
+                                  /* use capture */ true);
+}
+
+NS_IMETHODIMP
+WebAuthnManagerBase::HandleEvent(Event* aEvent) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aEvent);
+
+  nsAutoString type;
+  aEvent->GetType(type);
+  if (!type.Equals(kDeactivateEvent) && !type.Equals(kVisibilityChange)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // The "deactivate" event on the root window has no
+  // "current inner window" and thus GetTarget() is always null.
+  if (type.Equals(kVisibilityChange)) {
+    nsCOMPtr<Document> doc = do_QueryInterface(aEvent->GetTarget());
+    if (NS_WARN_IF(!doc) || !doc->Hidden()) {
+      return NS_OK;
+    }
+
+    nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(doc->GetInnerWindow());
+    if (NS_WARN_IF(!win) || !win->IsTopInnerWindow()) {
+      return NS_OK;
+    }
+  }
+
+  HandleVisibilityChange();
+  return NS_OK;
+}
+
+}  // namespace mozilla::dom