import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/ipc/StructuredCloneData.cpp

@@ -0,0 +1,133 @@
+/* -*- 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 "StructuredCloneData.h"
+
+#include "nsIDOMDOMException.h"
+#include "nsIMutable.h"
+#include "nsIXPConnect.h"
+
+#include "ipc/IPCMessageUtils.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/BlobBinding.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "nsContentUtils.h"
+#include "nsJSEnvironment.h"
+#include "MainThreadUtils.h"
+#include "StructuredCloneTags.h"
+#include "jsapi.h"
+
+namespace mozilla {
+namespace dom {
+namespace ipc {
+
+bool
+StructuredCloneData::Copy(const StructuredCloneData& aData)
+{
+  if (!aData.mInitialized) {
+    return true;
+  }
+
+  if (aData.SharedData()) {
+    mSharedData = aData.SharedData();
+  } else {
+    mSharedData =
+      SharedJSAllocatedData::CreateFromExternalData(aData.Data());
+    NS_ENSURE_TRUE(mSharedData, false);
+  }
+
+  PortIdentifiers().AppendElements(aData.PortIdentifiers());
+
+  MOZ_ASSERT(BlobImpls().IsEmpty());
+  BlobImpls().AppendElements(aData.BlobImpls());
+
+  MOZ_ASSERT(GetSurfaces().IsEmpty());
+  MOZ_ASSERT(WasmModules().IsEmpty());
+
+  mInitialized = true;
+
+  return true;
+}
+
+void
+StructuredCloneData::Read(JSContext* aCx,
+                          JS::MutableHandle<JS::Value> aValue,
+                          ErrorResult &aRv)
+{
+  MOZ_ASSERT(mInitialized);
+
+  nsIGlobalObject *global = xpc::NativeGlobal(JS::CurrentGlobalOrNull(aCx));
+  MOZ_ASSERT(global);
+
+  ReadFromBuffer(global, aCx, Data(), aValue, aRv);
+}
+
+void
+StructuredCloneData::Write(JSContext* aCx,
+                           JS::Handle<JS::Value> aValue,
+                           ErrorResult &aRv)
+{
+  Write(aCx, aValue, JS::UndefinedHandleValue, aRv);
+}
+
+void
+StructuredCloneData::Write(JSContext* aCx,
+                           JS::Handle<JS::Value> aValue,
+                           JS::Handle<JS::Value> aTransfer,
+                           ErrorResult &aRv)
+{
+  MOZ_ASSERT(!mInitialized);
+
+  StructuredCloneHolder::Write(aCx, aValue, aTransfer,
+                               JS::CloneDataPolicy().denySharedArrayBuffer(), aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  JSStructuredCloneData data;
+  mBuffer->abandon();
+  mBuffer->steal(&data);
+  mBuffer = nullptr;
+  mSharedData = new SharedJSAllocatedData(Move(data));
+  mInitialized = true;
+}
+
+void
+StructuredCloneData::WriteIPCParams(IPC::Message* aMsg) const
+{
+  WriteParam(aMsg, Data());
+}
+
+bool
+StructuredCloneData::ReadIPCParams(const IPC::Message* aMsg,
+                                   PickleIterator* aIter)
+{
+  MOZ_ASSERT(!mInitialized);
+  JSStructuredCloneData data;
+  if (!ReadParam(aMsg, aIter, &data)) {
+    return false;
+  }
+  mSharedData = new SharedJSAllocatedData(Move(data));
+  mInitialized = true;
+  return true;
+}
+
+bool
+StructuredCloneData::CopyExternalData(const char* aData,
+                                      size_t aDataLength)
+{
+  MOZ_ASSERT(!mInitialized);
+  mSharedData = SharedJSAllocatedData::CreateFromExternalData(aData,
+                                                              aDataLength);
+  NS_ENSURE_TRUE(mSharedData, false);
+  mInitialized = true;
+  return true;
+}
+
+} // namespace ipc
+} // namespace dom
+} // namespace mozilla