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Side by Side Diff: third_party/WebKit/Source/modules/broadcastchannel/BroadcastChannel.cpp

Issue 2004643002: Implement BroadcastChannel (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: better tests Created 4 years, 6 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "modules/broadcastchannel/BroadcastChannel.h"
6
7 #include "bindings/core/v8/SerializedScriptValue.h"
8 #include "core/dom/ExceptionCode.h"
9 #include "core/events/EventQueue.h"
10 #include "core/events/MessageEvent.h"
11
12 namespace blink {
13
14 // static
15 BroadcastChannel* BroadcastChannel::create(ExecutionContext* executionContext, c onst String& name, ExceptionState& exceptionState)
16 {
17 if (executionContext->getSecurityOrigin()->isUnique()) {
18 // TODO(mek): Decide what to do here depending on https://github.com/wha twg/html/issues/1319
19 exceptionState.throwDOMException(NotSupportedError, "Can't create Broadc astChannel in an opaque origin");
20 return nullptr;
21 }
22 BroadcastChannel* channel = new BroadcastChannel(executionContext, name);
23 channel->suspendIfNeeded();
haraken 2016/06/02 04:23:41 If you make BroadcastChannel a ContextLifecycleObs
Marijn Kruisselbrink 2016/06/02 18:33:29 Done
24 return channel;
25 }
26
27 BroadcastChannel::~BroadcastChannel()
28 {
29 close();
30 }
31
32 void BroadcastChannel::postMessage(const ScriptValue& message, ExceptionState& e xceptionState)
33 {
34 if (!m_connection) {
35 exceptionState.throwDOMException(InvalidStateError, "Channel is closed") ;
36 return;
37 }
38 RefPtr<SerializedScriptValue> value = SerializedScriptValue::serialize(messa ge.isolate(), message.v8Value(), nullptr, nullptr, exceptionState);
39 if (exceptionState.hadException())
40 return;
41
42 String data = value->toWireString();
43 m_connection->broadcast(this, data);
44 }
45
46 void BroadcastChannel::close()
47 {
48 if (m_connection)
49 m_connection->unregisterClient(this);
50 m_connection = nullptr;
51 }
52
53 void BroadcastChannel::onMessage(const String& message)
54 {
55 // Queue a task to dispatch the event.
56 RefPtr<SerializedScriptValue> value = SerializedScriptValue::create(message) ;
57 MessageEvent* event = MessageEvent::create(nullptr, value.release(), getExec utionContext()->getSecurityOrigin()->toString());
58 event->setTarget(this);
59 bool success = getExecutionContext()->getEventQueue()->enqueueEvent(event);
60 DCHECK(success);
61 ALLOW_UNUSED_LOCAL(success);
62 }
63
64 void BroadcastChannel::onError()
65 {
66 m_connection = nullptr;
67 close();
68 }
69
70 const AtomicString& BroadcastChannel::interfaceName() const
71 {
72 return EventTargetNames::BroadcastChannel;
73 }
74
75 bool BroadcastChannel::hasPendingActivity() const
76 {
77 return m_connection && hasEventListeners(EventTypeNames::message);
78 }
79
80 DEFINE_TRACE(BroadcastChannel)
81 {
82 ActiveDOMObject::trace(visitor);
83 EventTargetWithInlineData::trace(visitor);
84 }
85
86 BroadcastChannel::BroadcastChannel(ExecutionContext* executionContext, const Str ing& name)
87 : ActiveScriptWrappable(this)
88 , ActiveDOMObject(executionContext)
89 , m_origin(executionContext->getSecurityOrigin())
90 , m_name(name)
91 , m_connection(BroadcastChannelConnection::getForChannel(m_origin, m_name))
92 {
93 m_connection->registerClient(this);
94 }
95
96 } // namespace blink
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