1 files changed, 155 insertions, 0 deletions
diff --git a/dom/ipc/jsactor/JSWindowActorChild.cpp b/dom/ipc/jsactor/JSWindowActorChild.cpp
new file mode 100644
index 0000000000..2b533e296d
--- /dev/null
+++ b/dom/ipc/jsactor/JSWindowActorChild.cpp
@@ -0,0 +1,155 @@
+/* -*- 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/JSWindowActorBinding.h"
+#include "mozilla/dom/JSWindowActorChild.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/WindowGlobalChild.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/dom/WindowProxyHolder.h"
+#include "mozilla/dom/MessageManagerBinding.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "nsGlobalWindowInner.h"
+
+namespace mozilla::dom {
+
+JSWindowActorChild::~JSWindowActorChild() { MOZ_ASSERT(!mManager); }
+
+JSObject* JSWindowActorChild::WrapObject(JSContext* aCx,
+                                         JS::Handle<JSObject*> aGivenProto) {
+  return JSWindowActorChild_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+WindowGlobalChild* JSWindowActorChild::GetManager() const { return mManager; }
+
+void JSWindowActorChild::Init(const nsACString& aName,
+                              WindowGlobalChild* aManager) {
+  MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorChild twice!");
+  SetName(aName);
+  mManager = aManager;
+
+  InvokeCallback(CallbackFunction::ActorCreated);
+}
+
+void JSWindowActorChild::SendRawMessage(
+    const JSActorMessageMeta& aMeta, Maybe<ipc::StructuredCloneData>&& aData,
+    Maybe<ipc::StructuredCloneData>&& aStack, ErrorResult& aRv) {
+  if (NS_WARN_IF(!CanSend() || !mManager || !mManager->CanSend())) {
+    aRv.ThrowInvalidStateError("JSWindowActorChild cannot send at the moment");
+    return;
+  }
+
+  if (mManager->IsInProcess()) {
+    SendRawMessageInProcess(
+        aMeta, std::move(aData), std::move(aStack),
+        [manager{mManager}]() { return manager->GetParentActor(); });
+    return;
+  }
+
+  size_t length = 0;
+  if (aData) {
+    length += aData->DataLength();
+  }
+  if (aStack) {
+    length += aStack->DataLength();
+  }
+
+  if (NS_WARN_IF(!AllowMessage(aMeta, length))) {
+    aRv.ThrowDataCloneError(
+        nsPrintfCString("JSWindowActorChild serialization error: data too "
+                        "large, in actor '%s'",
+                        PromiseFlatCString(aMeta.actorName()).get()));
+    return;
+  }
+
+  // Cross-process case - send data over WindowGlobalChild to other side.
+  ContentChild* cc = ContentChild::GetSingleton();
+  Maybe<ClonedMessageData> msgData;
+  if (aData) {
+    msgData.emplace();
+    if (NS_WARN_IF(!aData->BuildClonedMessageDataForChild(cc, *msgData))) {
+      aRv.ThrowDataCloneError(
+          nsPrintfCString("JSWindowActorChild serialization error: cannot "
+                          "clone, in actor '%s'",
+                          PromiseFlatCString(aMeta.actorName()).get()));
+      return;
+    }
+  }
+
+  Maybe<ClonedMessageData> stackData;
+  if (aStack) {
+    stackData.emplace();
+    if (!aStack->BuildClonedMessageDataForChild(cc, *stackData)) {
+      stackData.reset();
+    }
+  }
+
+  if (NS_WARN_IF(!mManager->SendRawMessage(aMeta, msgData, stackData))) {
+    aRv.ThrowOperationError(
+        nsPrintfCString("JSWindowActorChild send error in actor '%s'",
+                        PromiseFlatCString(aMeta.actorName()).get()));
+    return;
+  }
+}
+
+Document* JSWindowActorChild::GetDocument(ErrorResult& aRv) {
+  if (!mManager) {
+    ThrowStateErrorForGetter("document", aRv);
+    return nullptr;
+  }
+
+  nsGlobalWindowInner* window = mManager->GetWindowGlobal();
+  return window ? window->GetDocument() : nullptr;
+}
+
+BrowsingContext* JSWindowActorChild::GetBrowsingContext(ErrorResult& aRv) {
+  if (!mManager) {
+    ThrowStateErrorForGetter("browsingContext", aRv);
+    return nullptr;
+  }
+
+  return mManager->BrowsingContext();
+}
+
+nsIDocShell* JSWindowActorChild::GetDocShell(ErrorResult& aRv) {
+  if (!mManager) {
+    ThrowStateErrorForGetter("docShell", aRv);
+    return nullptr;
+  }
+
+  return mManager->BrowsingContext()->GetDocShell();
+}
+
+Nullable<WindowProxyHolder> JSWindowActorChild::GetContentWindow(
+    ErrorResult& aRv) {
+  if (!mManager) {
+    ThrowStateErrorForGetter("contentWindow", aRv);
+    return nullptr;
+  }
+
+  if (nsGlobalWindowInner* window = mManager->GetWindowGlobal()) {
+    if (window->IsCurrentInnerWindow()) {
+      return WindowProxyHolder(window->GetBrowsingContext());
+    }
+  }
+
+  return nullptr;
+}
+
+void JSWindowActorChild::ClearManager() { mManager = nullptr; }
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(JSWindowActorChild, JSActor, mManager)
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(JSWindowActorChild, JSActor)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSWindowActorChild)
+NS_INTERFACE_MAP_END_INHERITING(JSActor)
+
+NS_IMPL_ADDREF_INHERITED(JSWindowActorChild, JSActor)
+NS_IMPL_RELEASE_INHERITED(JSWindowActorChild, JSActor)
+
+}  // namespace mozilla::dom