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
33#include "ExceptionCode.h"
34#include "MessagePort.h"
35#include "SerializedScriptValue.h"
36#include "V8Binding.h"
37#include "V8MessagePortCustom.h"
38#include "V8MessagePort.h"
39#include "V8Proxy.h"
40#include "V8Utilities.h"
41#include "WorkerContextExecutionProxy.h"
42
43namespace WebCore {
44
45v8::Handle<v8::Value> V8MessagePort::postMessageCallback(const v8::Arguments& args)
46{
47    INC_STATS("DOM.MessagePort.postMessage");
48    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
49    bool didThrow = false;
50    RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(args[0], didThrow);
51    if (didThrow)
52        return v8::Undefined();
53    MessagePortArray portArray;
54    if (args.Length() > 1) {
55        if (!getMessagePortArray(args[1], portArray))
56            return v8::Undefined();
57    }
58    ExceptionCode ec = 0;
59    messagePort->postMessage(message.release(), &portArray, ec);
60    return throwError(ec);
61}
62
63bool getMessagePortArray(v8::Local<v8::Value> value, MessagePortArray& portArray)
64{
65    if (isUndefinedOrNull(value)) {
66        portArray.resize(0);
67        return true;
68    }
69
70    if (!value->IsObject()) {
71        throwError("MessagePortArray argument must be an object");
72        return false;
73    }
74    uint32_t length = 0;
75    v8::Local<v8::Object> ports = v8::Local<v8::Object>::Cast(value);
76
77    if (value->IsArray()) {
78        v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
79        length = array->Length();
80    } else {
81        // Sequence-type object - get the length attribute
82        v8::Local<v8::Value> sequenceLength = ports->Get(v8::String::New("length"));
83        if (!sequenceLength->IsNumber()) {
84            throwError("MessagePortArray argument has no length attribute");
85            return false;
86        }
87        length = sequenceLength->Uint32Value();
88    }
89    portArray.resize(length);
90
91    for (unsigned int i = 0; i < length; ++i) {
92        v8::Local<v8::Value> port = ports->Get(v8::Integer::New(i));
93        // Validation of non-null objects, per HTML5 spec 8.3.3.
94        if (isUndefinedOrNull(port)) {
95            throwError(INVALID_STATE_ERR);
96            return false;
97        }
98        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
99        if (!V8MessagePort::HasInstance(port)) {
100            throwError("MessagePortArray argument must contain only MessagePorts");
101            return false;
102        }
103        portArray[i] = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(port));
104    }
105    return true;
106}
107
108} // namespace WebCore
109