/platform/external/webkit/WebCore/bindings/js/JSMessagePortCustom.cpp

  1/*
  2 * Copyright (C) 2008, 2009 Apple 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
  6 * are met:
  7 * 1. Redistributions of source code must retain the above copyright
  8 *    notice, this list of conditions and the following disclaimer.
  9 * 2. Redistributions in binary form must reproduce the above copyright
 10 *    notice, this list of conditions and the following disclaimer in the
 11 *    documentation and/or other materials provided with the distribution.
 12 *
 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 24 */
 25
 26#include "config.h"
 27#include "JSMessagePort.h"
 28
 29#include "AtomicString.h"
 30#include "Event.h"
 31#include "ExceptionCode.h"
 32#include "Frame.h"
 33#include "JSDOMGlobalObject.h"
 34#include "JSEvent.h"
 35#include "JSEventListener.h"
 36#include "JSMessagePortCustom.h"
 37#include "MessagePort.h"
 38#include <runtime/Error.h>
 39
 40using namespace JSC;
 41
 42namespace WebCore {
 43
 44void JSMessagePort::markChildren(MarkStack& markStack)
 45{
 46    Base::markChildren(markStack);
 47
 48    // 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().
 49    if (MessagePort* entangledPort = m_impl->locallyEntangledPort())
 50        markDOMObjectWrapper(markStack, *Heap::heap(this)->globalData(), entangledPort);
 51
 52    m_impl->markJSEventListeners(markStack);
 53}
 54
 55JSValue JSMessagePort::addEventListener(ExecState* exec, const ArgList& args)
 56{
 57    JSValue listener = args.at(1);
 58    if (!listener.isObject())
 59        return jsUndefined();
 60
 61    impl()->addEventListener(args.at(0).toString(exec), JSEventListener::create(asObject(listener), this, false, currentWorld(exec)).get(), args.at(2).toBoolean(exec));
 62    return jsUndefined();
 63}
 64
 65JSValue JSMessagePort::removeEventListener(ExecState* exec, const ArgList& args)
 66{
 67    JSValue listener = args.at(1);
 68    if (!listener.isObject())
 69        return jsUndefined();
 70
 71    impl()->removeEventListener(args.at(0).toString(exec), JSEventListener::create(asObject(listener), this, false, currentWorld(exec)).get(), args.at(2).toBoolean(exec));
 72    return jsUndefined();
 73}
 74
 75JSC::JSValue JSMessagePort::postMessage(JSC::ExecState* exec, const JSC::ArgList& args)
 76{
 77    return handlePostMessage(exec, args, impl());
 78}
 79
 80void fillMessagePortArray(JSC::ExecState* exec, JSC::JSValue value, MessagePortArray& portArray)
 81{
 82    // Convert from the passed-in JS array-like object to a MessagePortArray.
 83    // 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.
 84    if (value.isUndefinedOrNull()) {
 85        portArray.resize(0);
 86        return;
 87    }
 88
 89    // Validation of sequence types, per WebIDL spec 4.1.13.
 90    unsigned length;
 91    JSObject* object = toJSSequence(exec, value, length);
 92    if (exec->hadException())
 93        return;
 94
 95    portArray.resize(length);
 96    for (unsigned i = 0 ; i < length; ++i) {
 97        JSValue value = object->get(exec, i);
 98        if (exec->hadException())
 99            return;
100        // Validation of non-null objects, per HTML5 spec 8.3.3.
101        if (value.isUndefinedOrNull()) {
102            setDOMException(exec, INVALID_STATE_ERR);
103            return;
104        }
105
106        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
107        RefPtr<MessagePort> port = toMessagePort(value);
108        if (!port) {
109            throwError(exec, TypeError);
110            return;
111        }
112        portArray[i] = port.release();
113    }
114}
115
116} // namespace WebCore