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::addEventListenerCallback(const v8::Arguments& args)
46{
47    INC_STATS("DOM.MessagePort.addEventListener()");
48    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
49    RefPtr<EventListener> listener = V8DOMWrapper::getEventListener(messagePort, args[1], false, ListenerFindOrCreate);
50    if (listener) {
51        String type = toWebCoreString(args[0]);
52        bool useCapture = args[2]->BooleanValue();
53        messagePort->addEventListener(type, listener, useCapture);
54
55        createHiddenDependency(args.Holder(), args[1], cacheIndex);
56    }
57    return v8::Undefined();
58}
59
60v8::Handle<v8::Value> V8MessagePort::removeEventListenerCallback(const v8::Arguments& args)
61{
62    INC_STATS("DOM.MessagePort.removeEventListener()");
63    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
64    RefPtr<EventListener> listener = V8DOMWrapper::getEventListener(messagePort, args[1], false, ListenerFindOnly);
65    if (listener) {
66        String type = toWebCoreString(args[0]);
67        bool useCapture = args[2]->BooleanValue();
68        messagePort->removeEventListener(type, listener.get(), useCapture);
69
70        removeHiddenDependency(args.Holder(), args[1], cacheIndex);
71    }
72
73    return v8::Undefined();
74}
75
76v8::Handle<v8::Value> V8MessagePort::postMessageCallback(const v8::Arguments& args)
77{
78    INC_STATS("DOM.MessagePort.postMessage");
79    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
80    RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(args[0]);
81    MessagePortArray portArray;
82    if (args.Length() > 1) {
83        if (!getMessagePortArray(args[1], portArray))
84            return v8::Undefined();
85    }
86    ExceptionCode ec = 0;
87    messagePort->postMessage(message.release(), &portArray, ec);
88    return throwError(ec);
89}
90
91bool getMessagePortArray(v8::Local<v8::Value> value, MessagePortArray& portArray)
92{
93    if (isUndefinedOrNull(value)) {
94        portArray.resize(0);
95        return true;
96    }
97
98    if (!value->IsObject()) {
99        throwError("MessagePortArray argument must be an object");
100        return false;
101    }
102    uint32_t length = 0;
103    v8::Local<v8::Object> ports = v8::Local<v8::Object>::Cast(value);
104
105    if (value->IsArray()) {
106        v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
107        length = array->Length();
108    } else {
109        // Sequence-type object - get the length attribute
110        v8::Local<v8::Value> sequenceLength = ports->Get(v8::String::New("length"));
111        if (!sequenceLength->IsNumber()) {
112            throwError("MessagePortArray argument has no length attribute");
113            return false;
114        }
115        length = sequenceLength->Uint32Value();
116    }
117    portArray.resize(length);
118
119    for (unsigned int i = 0; i < length; ++i) {
120        v8::Local<v8::Value> port = ports->Get(v8::Integer::New(i));
121        // Validation of non-null objects, per HTML5 spec 8.3.3.
122        if (isUndefinedOrNull(port)) {
123            throwError(INVALID_STATE_ERR);
124            return false;
125        }
126        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
127        if (!V8MessagePort::HasInstance(port)) {
128            throwError("MessagePortArray argument must contain only MessagePorts");
129            return false;
130        }
131        portArray[i] = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(port));
132    }
133    return true;
134}
135
136} // namespace WebCore
137