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      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 
     43 namespace WebCore {
     44 
     45 v8::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 
     60 v8::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 
     76 v8::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 
     91 bool 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