1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "mozilla/dom/MessageEvent.h"
8 #include "mozilla/dom/BrowsingContext.h"
9 #include "mozilla/dom/MessageEventBinding.h"
10 #include "mozilla/dom/MessagePort.h"
11 #include "mozilla/dom/MessagePortBinding.h"
12 #include "mozilla/dom/ServiceWorker.h"
13
14 #include "mozilla/HoldDropJSObjects.h"
15 #include "jsapi.h"
16
17 namespace mozilla::dom {
18
19 NS_IMPL_CYCLE_COLLECTION_MULTI_ZONE_JSHOLDER_CLASS(MessageEvent)
20
21 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(MessageEvent, Event)
22 tmp->mData.setUndefined();
23 NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindowSource)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPortSource)24 NS_IMPL_CYCLE_COLLECTION_UNLINK(mPortSource)
25 NS_IMPL_CYCLE_COLLECTION_UNLINK(mServiceWorkerSource)
26 NS_IMPL_CYCLE_COLLECTION_UNLINK(mPorts)
27 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
28
29 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MessageEvent, Event)
30 NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindowSource)
31 NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPortSource)
32 NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mServiceWorkerSource)
33 NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPorts)
34 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
35
36 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MessageEvent, Event)
37 NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData)
38 NS_IMPL_CYCLE_COLLECTION_TRACE_END
39
40 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MessageEvent)
41 NS_INTERFACE_MAP_END_INHERITING(Event)
42
43 NS_IMPL_ADDREF_INHERITED(MessageEvent, Event)
44 NS_IMPL_RELEASE_INHERITED(MessageEvent, Event)
45
46 MessageEvent::MessageEvent(EventTarget* aOwner, nsPresContext* aPresContext,
47 WidgetEvent* aEvent)
48 : Event(aOwner, aPresContext, aEvent), mData(JS::UndefinedValue()) {}
49
~MessageEvent()50 MessageEvent::~MessageEvent() { DropJSObjects(this); }
51
WrapObjectInternal(JSContext * aCx,JS::Handle<JSObject * > aGivenProto)52 JSObject* MessageEvent::WrapObjectInternal(JSContext* aCx,
53 JS::Handle<JSObject*> aGivenProto) {
54 return mozilla::dom::MessageEvent_Binding::Wrap(aCx, this, aGivenProto);
55 }
56
GetData(JSContext * aCx,JS::MutableHandle<JS::Value> aData,ErrorResult & aRv)57 void MessageEvent::GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData,
58 ErrorResult& aRv) {
59 aData.set(mData);
60 if (!JS_WrapValue(aCx, aData)) {
61 aRv.Throw(NS_ERROR_FAILURE);
62 }
63 }
64
GetOrigin(nsAString & aOrigin) const65 void MessageEvent::GetOrigin(nsAString& aOrigin) const { aOrigin = mOrigin; }
66
GetLastEventId(nsAString & aLastEventId) const67 void MessageEvent::GetLastEventId(nsAString& aLastEventId) const {
68 aLastEventId = mLastEventId;
69 }
70
GetSource(Nullable<OwningWindowProxyOrMessagePortOrServiceWorker> & aValue) const71 void MessageEvent::GetSource(
72 Nullable<OwningWindowProxyOrMessagePortOrServiceWorker>& aValue) const {
73 if (mWindowSource) {
74 aValue.SetValue().SetAsWindowProxy() = mWindowSource;
75 } else if (mPortSource) {
76 aValue.SetValue().SetAsMessagePort() = mPortSource;
77 } else if (mServiceWorkerSource) {
78 aValue.SetValue().SetAsServiceWorker() = mServiceWorkerSource;
79 }
80 }
81
82 /* static */
Constructor(const GlobalObject & aGlobal,const nsAString & aType,const MessageEventInit & aParam)83 already_AddRefed<MessageEvent> MessageEvent::Constructor(
84 const GlobalObject& aGlobal, const nsAString& aType,
85 const MessageEventInit& aParam) {
86 nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
87 return Constructor(t, aType, aParam);
88 }
89
90 /* static */
Constructor(EventTarget * aEventTarget,const nsAString & aType,const MessageEventInit & aParam)91 already_AddRefed<MessageEvent> MessageEvent::Constructor(
92 EventTarget* aEventTarget, const nsAString& aType,
93 const MessageEventInit& aParam) {
94 RefPtr<MessageEvent> event = new MessageEvent(aEventTarget, nullptr, nullptr);
95
96 event->InitEvent(aType, aParam.mBubbles, aParam.mCancelable);
97 bool trusted = event->Init(aEventTarget);
98 event->SetTrusted(trusted);
99
100 event->mData = aParam.mData;
101
102 mozilla::HoldJSObjects(event.get());
103
104 event->mOrigin = aParam.mOrigin;
105 event->mLastEventId = aParam.mLastEventId;
106
107 if (!aParam.mSource.IsNull()) {
108 if (aParam.mSource.Value().IsWindowProxy()) {
109 event->mWindowSource = aParam.mSource.Value().GetAsWindowProxy().get();
110 } else if (aParam.mSource.Value().IsMessagePort()) {
111 event->mPortSource = aParam.mSource.Value().GetAsMessagePort();
112 } else {
113 event->mServiceWorkerSource = aParam.mSource.Value().GetAsServiceWorker();
114 }
115
116 MOZ_ASSERT(event->mWindowSource || event->mPortSource ||
117 event->mServiceWorkerSource);
118 }
119
120 event->mPorts.AppendElements(aParam.mPorts);
121
122 return event.forget();
123 }
124
InitMessageEvent(JSContext * aCx,const nsAString & aType,mozilla::CanBubble aCanBubble,mozilla::Cancelable aCancelable,JS::Handle<JS::Value> aData,const nsAString & aOrigin,const nsAString & aLastEventId,const Nullable<WindowProxyOrMessagePortOrServiceWorker> & aSource,const Sequence<OwningNonNull<MessagePort>> & aPorts)125 void MessageEvent::InitMessageEvent(
126 JSContext* aCx, const nsAString& aType, mozilla::CanBubble aCanBubble,
127 mozilla::Cancelable aCancelable, JS::Handle<JS::Value> aData,
128 const nsAString& aOrigin, const nsAString& aLastEventId,
129 const Nullable<WindowProxyOrMessagePortOrServiceWorker>& aSource,
130 const Sequence<OwningNonNull<MessagePort>>& aPorts) {
131 NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
132
133 Event::InitEvent(aType, aCanBubble, aCancelable);
134 mData = aData;
135 mozilla::HoldJSObjects(this);
136 mOrigin = aOrigin;
137 mLastEventId = aLastEventId;
138
139 mWindowSource = nullptr;
140 mPortSource = nullptr;
141 mServiceWorkerSource = nullptr;
142
143 if (!aSource.IsNull()) {
144 if (aSource.Value().IsWindowProxy()) {
145 mWindowSource = aSource.Value().GetAsWindowProxy().get();
146 } else if (aSource.Value().IsMessagePort()) {
147 mPortSource = &aSource.Value().GetAsMessagePort();
148 } else {
149 mServiceWorkerSource = &aSource.Value().GetAsServiceWorker();
150 }
151 }
152
153 mPorts.Clear();
154 mPorts.AppendElements(aPorts);
155 MessageEvent_Binding::ClearCachedPortsValue(this);
156 }
157
GetPorts(nsTArray<RefPtr<MessagePort>> & aPorts)158 void MessageEvent::GetPorts(nsTArray<RefPtr<MessagePort>>& aPorts) {
159 aPorts = mPorts.Clone();
160 }
161
162 } // namespace mozilla::dom
163