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      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 
     40 using namespace JSC;
     41 
     42 namespace WebCore {
     43 
     44 void 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 
     55 JSValue 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 
     65 JSValue 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 
     75 JSC::JSValue JSMessagePort::postMessage(JSC::ExecState* exec, const JSC::ArgList& args)
     76 {
     77     return handlePostMessage(exec, args, impl());
     78 }
     79 
     80 void 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
    117