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 "V8MessageChannel.h"
33
34#include "Document.h"
35#include "Frame.h"
36#include "MessageChannel.h"
37#include "V8Binding.h"
38#include "V8MessagePort.h"
39#include "V8Proxy.h"
40#include "V8Utilities.h"
41#include "WorkerContext.h"
42#include "WorkerContextExecutionProxy.h"
43
44#include <wtf/RefPtr.h>
45
46namespace WebCore {
47
48v8::Handle<v8::Value> V8MessageChannel::constructorCallback(const v8::Arguments& args)
49{
50    INC_STATS("DOM.MessageChannel.Constructor");
51    // FIXME: The logic here is almost exact duplicate of V8::constructDOMObject.
52    // Consider refactoring to reduce duplication.
53    if (!args.IsConstructCall())
54        return throwError("DOM object constructor cannot be called as a function.");
55
56    // Get the ScriptExecutionContext (WorkerContext or Document)
57    ScriptExecutionContext* context = getScriptExecutionContext();
58    if (!context)
59        return v8::Undefined();
60
61    // Note: it's OK to let this RefPtr go out of scope because we also call
62    // SetDOMWrapper(), which effectively holds a reference to obj.
63    RefPtr<MessageChannel> obj = MessageChannel::create(context);
64
65    v8::Local<v8::Object> messageChannel = args.Holder();
66
67    // Create references from the MessageChannel wrapper to the two
68    // MessagePort wrappers to make sure that the MessagePort wrappers
69    // stay alive as long as the MessageChannel wrapper is around.
70    V8DOMWrapper::setHiddenReference(messageChannel, toV8(obj->port1()));
71    V8DOMWrapper::setHiddenReference(messageChannel, toV8(obj->port2()));
72
73    // Setup the standard wrapper object internal fields.
74    V8DOMWrapper::setDOMWrapper(messageChannel, &info, obj.get());
75    return toV8(obj.release(), messageChannel);
76}
77
78
79} // namespace WebCore
80