gecko-dev/dom/events/MessageEvent.cpp

220 lines
6.0 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/MessagePortList.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_JSVAL_MEMBER_CALLBACK(mData)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(MessageEvent)
NS_INTERFACE_MAP_ENTRY(nsIDOMMessageEvent)
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)
{
return mozilla::dom::MessageEventBinding::Wrap(aCx, this);
}
NS_IMETHODIMP
MessageEvent::GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData)
{
ErrorResult rv;
GetData(aCx, aData, rv);
return rv.ErrorCode();
}
void
MessageEvent::GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData,
ErrorResult& aRv)
{
JS::ExposeValueToActiveJS(mData);
aData.set(mData);
if (!JS_WrapValue(aCx, aData)) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
NS_IMETHODIMP
MessageEvent::GetOrigin(nsAString& aOrigin)
{
aOrigin = mOrigin;
return NS_OK;
}
NS_IMETHODIMP
MessageEvent::GetLastEventId(nsAString& aLastEventId)
{
aLastEventId = mLastEventId;
return NS_OK;
}
NS_IMETHODIMP
MessageEvent::GetSource(nsIDOMWindow** aSource)
{
NS_IF_ADDREF(*aSource = mWindowSource);
return NS_OK;
}
void
MessageEvent::GetSource(Nullable<OwningWindowProxyOrMessagePort>& aValue) const
{
if (mWindowSource) {
aValue.SetValue().SetAsWindowProxy() = mWindowSource;
} 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)
{
nsRefPtr<MessageEvent> event = new MessageEvent(aEventTarget, nullptr, nullptr);
aRv = event->InitEvent(aType, aParam.mBubbles, aParam.mCancelable);
if (aRv.Failed()) {
return nullptr;
}
bool trusted = event->Init(aEventTarget);
event->SetTrusted(trusted);
event->mData = aParam.mData;
mozilla::HoldJSObjects(event.get());
if (aParam.mOrigin.WasPassed()) {
event->mOrigin = aParam.mOrigin.Value();
}
if (aParam.mLastEventId.WasPassed()) {
event->mLastEventId = aParam.mLastEventId.Value();
}
if (!aParam.mSource.IsNull()) {
if (aParam.mSource.Value().IsWindow()) {
event->mWindowSource = aParam.mSource.Value().GetAsWindow();
} else {
event->mPortSource = aParam.mSource.Value().GetAsMessagePort();
}
MOZ_ASSERT(event->mWindowSource || event->mPortSource);
}
if (aParam.mPorts.WasPassed() && !aParam.mPorts.Value().IsNull()) {
nsTArray<nsRefPtr<MessagePortBase>> ports;
for (uint32_t i = 0, len = aParam.mPorts.Value().Value().Length(); i < len; ++i) {
ports.AppendElement(aParam.mPorts.Value().Value()[i].get());
}
event->mPorts = new MessagePortList(static_cast<EventBase*>(event), ports);
}
return event.forget();
}
NS_IMETHODIMP
MessageEvent::InitMessageEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
JS::Handle<JS::Value> aData,
const nsAString& aOrigin,
const nsAString& aLastEventId,
nsIDOMWindow* aSource)
{
nsresult rv = Event::InitEvent(aType, aCanBubble, aCancelable);
NS_ENSURE_SUCCESS(rv, rv);
mData = aData;
mozilla::HoldJSObjects(this);
mOrigin = aOrigin;
mLastEventId = aLastEventId;
mWindowSource = aSource;
return NS_OK;
}
void
MessageEvent::SetPorts(MessagePortList* aPorts)
{
MOZ_ASSERT(!mPorts && aPorts);
mPorts = aPorts;
}
} // namespace dom
} // namespace mozilla
using namespace mozilla;
using namespace mozilla::dom;
nsresult
NS_NewDOMMessageEvent(nsIDOMEvent** aInstancePtrResult,
EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetEvent* aEvent)
{
MessageEvent* it = new MessageEvent(aOwner, aPresContext, aEvent);
NS_ADDREF(it);
*aInstancePtrResult = static_cast<Event*>(it);
return NS_OK;
}