1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "MessageChannel.h"
33
34 #include "V8Binding.h"
35 #include "V8Proxy.h"
36
37 #include "Document.h"
38 #include "Frame.h"
39 #include "WorkerContext.h"
40 #include "WorkerContextExecutionProxy.h"
41
42 #include <wtf/RefPtr.h>
43
44 namespace WebCore {
45
CALLBACK_FUNC_DECL(MessageChannelConstructor)46 CALLBACK_FUNC_DECL(MessageChannelConstructor)
47 {
48 INC_STATS("DOM.MessageChannel.Constructor");
49 // FIXME: The logic here is almost exact duplicate of V8::constructDOMObject.
50 // Consider refactoring to reduce duplication.
51 if (!args.IsConstructCall())
52 return throwError("DOM object constructor cannot be called as a function.");
53
54 // Get the ScriptExecutionContext (WorkerContext or Document)
55 ScriptExecutionContext* context = 0;
56 WorkerContextExecutionProxy* proxy = WorkerContextExecutionProxy::retrieve();
57 if (proxy)
58 context = proxy->workerContext();
59 else {
60 Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
61 if (!frame)
62 return v8::Undefined();
63 context = frame->document();
64 }
65
66 // Note: it's OK to let this RefPtr go out of scope because we also call
67 // SetDOMWrapper(), which effectively holds a reference to obj.
68 RefPtr<MessageChannel> obj = MessageChannel::create(context);
69
70 v8::Local<v8::Object> messageChannel = args.Holder();
71
72 // Create references from the MessageChannel wrapper to the two
73 // MessagePort wrappers to make sure that the MessagePort wrappers
74 // stay alive as long as the MessageChannel wrapper is around.
75 messageChannel->SetInternalField(kMessageChannelPort1Index, V8DOMWrapper::convertToV8Object(V8ClassIndex::MESSAGEPORT, obj->port1()));
76 messageChannel->SetInternalField(kMessageChannelPort2Index, V8DOMWrapper::convertToV8Object(V8ClassIndex::MESSAGEPORT, obj->port2()));
77
78 // Setup the standard wrapper object internal fields.
79 V8DOMWrapper::setDOMWrapper(messageChannel, V8ClassIndex::MESSAGECHANNEL, obj.get());
80 return toV8(obj.release(), messageChannel);
81 }
82
83
84 } // namespace WebCore
85