1/*
2 * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
3 * Copyright (C) 2011 Google Inc. All Rights Reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "JSMessagePort.h"
29
30#include "Event.h"
31#include "ExceptionCode.h"
32#include "Frame.h"
33#include "JSDOMBinding.h"
34#include "JSDOMGlobalObject.h"
35#include "JSEvent.h"
36#include "JSEventListener.h"
37#include "JSMessagePortCustom.h"
38#include "MessagePort.h"
39#include <heap/SlotVisitorInlines.h>
40#include <runtime/Error.h>
41#include <runtime/JSArrayBuffer.h>
42#include <wtf/text/AtomicString.h>
43
44using namespace JSC;
45
46namespace WebCore {
47
48void JSMessagePort::visitAdditionalChildren(SlotVisitor& visitor)
49{
50    // If we have a locally entangled port, we can directly mark it as reachable. Ports that are remotely entangled are marked in-use by markActiveObjectsForContext().
51    if (MessagePort* port = impl().locallyEntangledPort())
52        visitor.addOpaqueRoot(port);
53}
54
55JSC::JSValue JSMessagePort::postMessage(JSC::ExecState* exec)
56{
57    return handlePostMessage(exec, &impl());
58}
59
60void fillMessagePortArray(JSC::ExecState* exec, JSC::JSValue value, MessagePortArray& portArray, ArrayBufferArray& arrayBuffers)
61{
62    // Convert from the passed-in JS array-like object to a MessagePortArray.
63    // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec.
64    if (value.isUndefinedOrNull()) {
65        portArray.resize(0);
66        arrayBuffers.resize(0);
67        return;
68    }
69
70    // Validation of sequence types, per WebIDL spec 4.1.13.
71    unsigned length = 0;
72    JSObject* object = toJSSequence(exec, value, length);
73    if (exec->hadException())
74        return;
75
76    for (unsigned i = 0 ; i < length; ++i) {
77        JSValue value = object->get(exec, i);
78        if (exec->hadException())
79            return;
80        // Validation of non-null objects, per HTML5 spec 10.3.3.
81        if (value.isUndefinedOrNull()) {
82            setDOMException(exec, INVALID_STATE_ERR);
83            return;
84        }
85
86        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
87        RefPtr<MessagePort> port = toMessagePort(value);
88        if (port) {
89            // Check for duplicate ports.
90            if (portArray.contains(port)) {
91                setDOMException(exec, INVALID_STATE_ERR);
92                return;
93            }
94            portArray.append(port.release());
95        } else {
96            RefPtr<ArrayBuffer> arrayBuffer = toArrayBuffer(value);
97            if (arrayBuffer)
98                arrayBuffers.append(arrayBuffer);
99            else {
100                throwTypeError(exec);
101                return;
102            }
103        }
104    }
105}
106
107} // namespace WebCore
108