1 files changed, 117 insertions, 0 deletions
diff --git a/dom/ipc/jsactor/JSActorProtocolUtils.h b/dom/ipc/jsactor/JSActorProtocolUtils.h
new file mode 100644
index 0000000000..b1fb4d461c
--- /dev/null
+++ b/dom/ipc/jsactor/JSActorProtocolUtils.h
@@ -0,0 +1,117 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_JSActorProtocolUtils_h
+#define mozilla_dom_JSActorProtocolUtils_h
+
+#include "mozilla/Assertions.h"   // MOZ_ASSERT
+#include "mozilla/ErrorResult.h"  // ErrorResult
+
+namespace mozilla {
+
+namespace dom {
+
+class JSActorProtocolUtils {
+ public:
+  template <typename ProtoT, typename ActorInfoT>
+  static void FromIPCShared(ProtoT& aProto, const ActorInfoT& aInfo) {
+    aProto->mRemoteTypes = aInfo.remoteTypes().Clone();
+
+    if (aInfo.isESModule()) {
+      aProto->mChild.mESModuleURI = aInfo.url();
+    } else {
+      aProto->mChild.mModuleURI = aInfo.url();
+    }
+
+    aProto->mChild.mObservers = aInfo.observers().Clone();
+  }
+
+  template <typename ProtoT, typename ActorInfoT>
+  static void ToIPCShared(ActorInfoT& aInfo, const ProtoT& aProto) {
+    aInfo.name() = aProto->mName;
+
+    aInfo.remoteTypes() = aProto->mRemoteTypes.Clone();
+
+    if (aProto->mChild.mModuleURI) {
+      aInfo.url() = aProto->mChild.mModuleURI;
+      aInfo.isESModule() = false;
+    } else {
+      aInfo.url() = aProto->mChild.mESModuleURI;
+      aInfo.isESModule() = true;
+    }
+
+    aInfo.observers() = aProto->mChild.mObservers.Clone();
+  }
+
+  template <typename ProtoT, typename ActorOptionsT>
+  static bool FromWebIDLOptionsShared(ProtoT& aProto,
+                                      const ActorOptionsT& aOptions,
+                                      ErrorResult& aRv) {
+    if (aOptions.mRemoteTypes.WasPassed()) {
+      MOZ_ASSERT(aOptions.mRemoteTypes.Value().Length());
+      aProto->mRemoteTypes = aOptions.mRemoteTypes.Value();
+    }
+
+    if (aOptions.mParent.WasPassed()) {
+      const auto& parentOptions = aOptions.mParent.Value();
+
+      if (parentOptions.mModuleURI.WasPassed()) {
+        if (parentOptions.mEsModuleURI.WasPassed()) {
+          aRv.ThrowNotSupportedError(
+              "moduleURI and esModuleURI are mutually exclusive.");
+          return false;
+        }
+
+        aProto->mParent.mModuleURI.emplace(parentOptions.mModuleURI.Value());
+      } else if (parentOptions.mEsModuleURI.WasPassed()) {
+        aProto->mParent.mESModuleURI.emplace(
+            parentOptions.mEsModuleURI.Value());
+      } else {
+        aRv.ThrowNotSupportedError(
+            "Either moduleURI or esModuleURI is required.");
+        return false;
+      }
+    }
+    if (aOptions.mChild.WasPassed()) {
+      const auto& childOptions = aOptions.mChild.Value();
+
+      if (childOptions.mModuleURI.WasPassed()) {
+        if (childOptions.mEsModuleURI.WasPassed()) {
+          aRv.ThrowNotSupportedError(
+              "moduleURI and esModuleURI are exclusive.");
+          return false;
+        }
+
+        aProto->mChild.mModuleURI.emplace(childOptions.mModuleURI.Value());
+      } else if (childOptions.mEsModuleURI.WasPassed()) {
+        aProto->mChild.mESModuleURI.emplace(childOptions.mEsModuleURI.Value());
+      } else {
+        aRv.ThrowNotSupportedError(
+            "Either moduleURI or esModuleURI is required.");
+        return false;
+      }
+    }
+
+    if (!aOptions.mChild.WasPassed() && !aOptions.mParent.WasPassed()) {
+      aRv.ThrowNotSupportedError(
+          "No point registering an actor with neither child nor parent "
+          "specifications.");
+      return false;
+    }
+
+    if (aOptions.mChild.WasPassed() &&
+        aOptions.mChild.Value().mObservers.WasPassed()) {
+      aProto->mChild.mObservers = aOptions.mChild.Value().mObservers.Value();
+    }
+
+    return true;
+  }
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_JSActorProtocolUtils_h