import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/events/MessageEvent.cpp

@@ -0,0 +1,181 @@
+/* -*- 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/MessageEvent.h"
+#include "mozilla/dom/MessageEventBinding.h"
+#include "mozilla/dom/MessagePort.h"
+#include "mozilla/dom/MessagePortBinding.h"
+
+#include "mozilla/HoldDropJSObjects.h"
+#include "jsapi.h"
+#include "nsGlobalWindow.h" // So we can assign an nsGlobalWindow* to mWindowSource
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(MessageEvent)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(MessageEvent, Event)
+  tmp->mData.setUndefined();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindowSource)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPortSource)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPorts)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MessageEvent, Event)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindowSource)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPortSource)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPorts)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MessageEvent, Event)
+  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(MessageEvent)
+NS_INTERFACE_MAP_END_INHERITING(Event)
+
+NS_IMPL_ADDREF_INHERITED(MessageEvent, Event)
+NS_IMPL_RELEASE_INHERITED(MessageEvent, Event)
+
+MessageEvent::MessageEvent(EventTarget* aOwner,
+                           nsPresContext* aPresContext,
+                           WidgetEvent* aEvent)
+  : Event(aOwner, aPresContext, aEvent)
+  , mData(JS::UndefinedValue())
+{
+}
+
+MessageEvent::~MessageEvent()
+{
+  mData.setUndefined();
+  DropJSObjects(this);
+}
+
+JSObject*
+MessageEvent::WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return mozilla::dom::MessageEventBinding::Wrap(aCx, this, aGivenProto);
+}
+
+void
+MessageEvent::GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData,
+                      ErrorResult& aRv)
+{
+  aData.set(mData);
+  if (!JS_WrapValue(aCx, aData)) {
+    aRv.Throw(NS_ERROR_FAILURE);
+  }
+}
+
+void
+MessageEvent::GetOrigin(nsAString& aOrigin) const
+{
+  aOrigin = mOrigin;
+}
+
+void
+MessageEvent::GetLastEventId(nsAString& aLastEventId) const
+{
+  aLastEventId = mLastEventId;
+}
+
+void
+MessageEvent::GetSource(Nullable<OwningWindowProxyOrMessagePort>& aValue) const
+{
+  if (mWindowSource) {
+    aValue.SetValue().SetAsWindowProxy() = mWindowSource->GetOuterWindow();
+  } else if (mPortSource) {
+    aValue.SetValue().SetAsMessagePort() = mPortSource;
+  }
+}
+
+/* static */ already_AddRefed<MessageEvent>
+MessageEvent::Constructor(const GlobalObject& aGlobal,
+                          const nsAString& aType,
+                          const MessageEventInit& aParam,
+                          ErrorResult& aRv)
+{
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  return Constructor(t, aType, aParam, aRv);
+}
+
+/* static */ already_AddRefed<MessageEvent>
+MessageEvent::Constructor(EventTarget* aEventTarget,
+                          const nsAString& aType,
+                          const MessageEventInit& aParam,
+                          ErrorResult& aRv)
+{
+  RefPtr<MessageEvent> event = new MessageEvent(aEventTarget, nullptr, nullptr);
+
+  event->InitEvent(aType, aParam.mBubbles, aParam.mCancelable);
+  bool trusted = event->Init(aEventTarget);
+  event->SetTrusted(trusted);
+
+  event->mData = aParam.mData;
+
+  mozilla::HoldJSObjects(event.get());
+
+  event->mOrigin = aParam.mOrigin;
+  event->mLastEventId = aParam.mLastEventId;
+
+  if (!aParam.mSource.IsNull()) {
+    if (aParam.mSource.Value().IsWindow()) {
+      event->mWindowSource = aParam.mSource.Value().GetAsWindow()->AsInner();
+    } else {
+      event->mPortSource = aParam.mSource.Value().GetAsMessagePort();
+    }
+
+    MOZ_ASSERT(event->mWindowSource || event->mPortSource);
+  }
+
+  event->mPorts.AppendElements(aParam.mPorts);
+
+  return event.forget();
+}
+
+void
+MessageEvent::InitMessageEvent(JSContext* aCx, const nsAString& aType,
+                               bool aCanBubble, bool aCancelable,
+                               JS::Handle<JS::Value> aData,
+                               const nsAString& aOrigin,
+                               const nsAString& aLastEventId,
+                               const Nullable<WindowProxyOrMessagePort>& aSource,
+                               const Sequence<OwningNonNull<MessagePort>>& aPorts)
+{
+  NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
+
+  Event::InitEvent(aType, aCanBubble, aCancelable);
+  mData = aData;
+  mozilla::HoldJSObjects(this);
+  mOrigin = aOrigin;
+  mLastEventId = aLastEventId;
+
+  mWindowSource = nullptr;
+  mPortSource = nullptr;
+
+  if (!aSource.IsNull()) {
+    if (aSource.Value().IsWindowProxy()) {
+      auto* windowProxy = aSource.Value().GetAsWindowProxy();
+      mWindowSource = windowProxy ? windowProxy->GetCurrentInnerWindow() : nullptr;
+    } else {
+      mPortSource = &aSource.Value().GetAsMessagePort();
+    }
+  }
+
+  mPorts.Clear();
+  mPorts.AppendElements(aPorts);
+  MessageEventBinding::ClearCachedPortsValue(this);
+}
+
+void
+MessageEvent::GetPorts(nsTArray<RefPtr<MessagePort>>& aPorts)
+{
+  aPorts = mPorts;
+}
+
+} // namespace dom
+} // namespace mozilla