Attachment #8845514 for bug #1311324

Attachment #8845514: P1 Update the MessageEvent webidl and implementation class. r=baku for bug #1311324

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  }

  // Create the event
  nsCOMPtr<mozilla::dom::EventTarget> eventTarget = do_QueryObject(targetWindow);
  RefPtr<MessageEvent> event =
    new MessageEvent(eventTarget, nullptr, nullptr);


  Nullable<WindowProxyOrMessagePortOrServiceWorker> source;
  source.SetValue().SetAsWindowProxy() = mSource ? mSource->AsOuter() : nullptr;

  Sequence<OwningNonNull<MessagePort>> ports;
  if (!TakeTransferredPortsAsSequence(ports)) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  event->InitMessageEvent(nullptr, NS_LITERAL_STRING("message"),





/* 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/dom/workers/bindings/ServiceWorker.h"

#include "mozilla/HoldDropJSObjects.h"
#include "jsapi.h"
#include "nsGlobalWindow.h" // So we can assign an nsGlobalWindow* to mWindowSource

namespace mozilla {
namespace dom {



void
MessageEvent::GetLastEventId(nsAString& aLastEventId) const
{
  aLastEventId = mLastEventId;
}

void
MessageEvent::GetSource(Nullable<OwningWindowProxyOrMessagePortOrServiceWorker>& aValue) const
{
  if (mWindowSource) {
    aValue.SetValue().SetAsWindowProxy() = mWindowSource->GetOuterWindow();
  } else if (mPortSource) {
    aValue.SetValue().SetAsMessagePort() = mPortSource;
  } else if (mServiceWorker) {
    aValue.SetValue().SetAsServiceWorker() = mServiceWorker;
  }
}

/* static */ already_AddRefed<MessageEvent>
MessageEvent::Constructor(const GlobalObject& aGlobal,
                          const nsAString& aType,
                          const MessageEventInit& aParam,
                          ErrorResult& aRv)

  event->mData = aParam.mData;

  mozilla::HoldJSObjects(event.get());

  event->mOrigin = aParam.mOrigin;
  event->mLastEventId = aParam.mLastEventId;

  if (!aParam.mSource.IsNull()) {
    if (aParam.mSource.Value().IsWindowProxy()) {
      event->mWindowSource = aParam.mSource.Value().GetAsWindowProxy()->AsInner();
    } else if (aParam.mSource.Value().IsMessagePort()) {
      event->mPortSource = aParam.mSource.Value().GetAsMessagePort();
    } else {
      event->mServiceWorker = aParam.mSource.Value().GetAsServiceWorker();
    }

    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<WindowProxyOrMessagePortOrServiceWorker>& 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;


  mWindowSource = nullptr;
  mPortSource = nullptr;

  if (!aSource.IsNull()) {
    if (aSource.Value().IsWindowProxy()) {
      auto* windowProxy = aSource.Value().GetAsWindowProxy();
      mWindowSource = windowProxy ? windowProxy->GetCurrentInnerWindow() : nullptr;
    } else if (aSource.Value().IsMessagePort()) {
      mPortSource = &aSource.Value().GetAsMessagePort();
    } else {
      mServiceWorker = &aSource.Value().GetAsServiceWorker();
    }
  }

  mPorts.Clear();
  mPorts.AppendElements(aPorts);
  MessageEventBinding::ClearCachedPortsValue(this);
}






#include "mozilla/dom/BindingUtils.h"
#include "nsCycleCollectionParticipant.h"

namespace mozilla {
namespace dom {

struct MessageEventInit;
class MessagePort;
class OwningWindowProxyOrMessagePortOrServiceWorker;
class WindowProxyOrMessagePortOrServiceWorker;

namespace workers {
class ServiceWorker;
}

/**
 * Implements the MessageEvent event, used for cross-document messaging and
 * server-sent events.
 *
 * See http://www.whatwg.org/specs/web-apps/current-work/#messageevent for
 * further details.
 */

  NS_FORWARD_TO_EVENT

  virtual JSObject* WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

  void GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData,
               ErrorResult& aRv);
  void GetOrigin(nsAString&) const;
  void GetLastEventId(nsAString&) const;
  void GetSource(Nullable<OwningWindowProxyOrMessagePortOrServiceWorker>& aValue) const;

  void GetPorts(nsTArray<RefPtr<MessagePort>>& aPorts);

  static already_AddRefed<MessageEvent>
  Constructor(const GlobalObject& aGlobal,
              const nsAString& aType,
              const MessageEventInit& aEventInit,
              ErrorResult& aRv);

  Constructor(EventTarget* aEventTarget,
              const nsAString& aType,
              const MessageEventInit& aEventInit,
              ErrorResult& aRv);

  void InitMessageEvent(JSContext* aCx, const nsAString& aType, bool aCanBubble,
                        bool aCancelable, JS::Handle<JS::Value> aData,
                        const nsAString& aOrigin, const nsAString& aLastEventId,
                        const Nullable<WindowProxyOrMessagePortOrServiceWorker>& aSource,
                        const Sequence<OwningNonNull<MessagePort>>& aPorts);

protected:
  ~MessageEvent();

private:
  JS::Heap<JS::Value> mData;
  nsString mOrigin;
  nsString mLastEventId;
  RefPtr<nsPIDOMWindowInner> mWindowSource;
  RefPtr<MessagePort> mPortSource;
  RefPtr<mozilla::dom::workers::ServiceWorker> mServiceWorker;

  nsTArray<RefPtr<MessagePort>> mPorts;
};

} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_MessageEvent_h_





  readonly attribute any data;

  /**
   * The origin of the site from which this event originated, which is the
   * scheme, ":", and if the URI has a host, "//" followed by the
   * host, and if the port is not the default for the given scheme,
   * ":" followed by that port.  This value does not have a trailing slash.
   */
  readonly attribute USVString origin;

  /**
   * The last event ID string of the event source, for server-sent DOM events; this
   * value is the empty string for cross-origin messaging.
   */
  readonly attribute DOMString lastEventId;

  /**
   * The window or port which originated this event.
   */
  readonly attribute MessageEventSource? source;

  /**
   * Initializes this event with the given data, in a manner analogous to
   * the similarly-named method on the nsIDOMEvent interface, also setting the
   * data, origin, source, and lastEventId attributes of this appropriately.
   */
  [Pure, Cached, Frozen]
  readonly attribute sequence<MessagePort> ports;

  void initMessageEvent(DOMString type, boolean bubbles, boolean cancelable,
                        any data, DOMString origin, DOMString lastEventId,
                        MessageEventSource? source,
                        sequence<MessagePort> ports);
};

dictionary MessageEventInit : EventInit {
  any data = null;
  DOMString origin = "";
  DOMString lastEventId = "";
  MessageEventSource? source = null;
  sequence<MessagePort> ports = [];
};

typedef (WindowProxy or MessagePort or ServiceWorker) MessageEventSource;

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