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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 #include "V8MessageEvent.h"
     33 
     34 #include "V8Blob.h"
     35 #include "V8MessagePort.h"
     36 #include "V8Window.h"
     37 #include "bindings/v8/SerializedScriptValue.h"
     38 #include "bindings/v8/V8Binding.h"
     39 #include "bindings/v8/V8HiddenPropertyName.h"
     40 #include "bindings/v8/custom/V8ArrayBufferCustom.h"
     41 #include "core/events/MessageEvent.h"
     42 
     43 namespace WebCore {
     44 
     45 void V8MessageEvent::dataAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
     46 {
     47     MessageEvent* event = V8MessageEvent::toNative(info.Holder());
     48 
     49     v8::Handle<v8::Value> result;
     50     switch (event->dataType()) {
     51     case MessageEvent::DataTypeScriptValue: {
     52         result = info.Holder()->GetHiddenValue(V8HiddenPropertyName::data(info.GetIsolate()));
     53         if (result.IsEmpty()) {
     54             if (!event->dataAsSerializedScriptValue()) {
     55                 // If we're in an isolated world and the event was created in the main world,
     56                 // we need to find the 'data' property on the main world wrapper and clone it.
     57                 v8::Local<v8::Value> mainWorldData = getHiddenValueFromMainWorldWrapper(info.GetIsolate(), event, V8HiddenPropertyName::data(info.GetIsolate()));
     58                 if (!mainWorldData.IsEmpty())
     59                     event->setSerializedData(SerializedScriptValue::createAndSwallowExceptions(mainWorldData, info.GetIsolate()));
     60             }
     61             if (event->dataAsSerializedScriptValue())
     62                 result = event->dataAsSerializedScriptValue()->deserialize(info.GetIsolate());
     63             else
     64                 result = v8::Null(info.GetIsolate());
     65         }
     66         break;
     67     }
     68 
     69     case MessageEvent::DataTypeSerializedScriptValue:
     70         if (SerializedScriptValue* serializedValue = event->dataAsSerializedScriptValue()) {
     71             MessagePortArray ports = event->ports();
     72             result = serializedValue->deserialize(info.GetIsolate(), &ports);
     73         } else {
     74             result = v8::Null(info.GetIsolate());
     75         }
     76         break;
     77 
     78     case MessageEvent::DataTypeString: {
     79         String stringValue = event->dataAsString();
     80         result = v8String(info.GetIsolate(), stringValue);
     81         break;
     82     }
     83 
     84     case MessageEvent::DataTypeBlob:
     85         result = toV8(event->dataAsBlob(), info.Holder(), info.GetIsolate());
     86         break;
     87 
     88     case MessageEvent::DataTypeArrayBuffer:
     89         result = toV8(event->dataAsArrayBuffer(), info.Holder(), info.GetIsolate());
     90         break;
     91     }
     92 
     93     // Overwrite the data attribute so it returns the cached result in future invocations.
     94     // This custom handler (dataAccessGetter) will not be called again.
     95     v8::PropertyAttribute dataAttr = static_cast<v8::PropertyAttribute>(v8::DontDelete | v8::ReadOnly);
     96     info.Holder()->ForceSet(v8AtomicString(info.GetIsolate(), "data"), result, dataAttr);
     97     v8SetReturnValue(info, result);
     98 }
     99 
    100 void V8MessageEvent::initMessageEventMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
    101 {
    102     MessageEvent* event = V8MessageEvent::toNative(info.Holder());
    103     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, typeArg, info[0]);
    104     V8TRYCATCH_VOID(bool, canBubbleArg, info[1]->BooleanValue());
    105     V8TRYCATCH_VOID(bool, cancelableArg, info[2]->BooleanValue());
    106     v8::Handle<v8::Value> dataArg = info[3];
    107     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, originArg, info[4]);
    108     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, lastEventIdArg, info[5]);
    109 
    110     DOMWindow* sourceArg = 0;
    111     if (info[6]->IsObject()) {
    112         v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(info[6]);
    113         v8::Handle<v8::Object> window = wrapper->FindInstanceInPrototypeChain(V8Window::domTemplate(info.GetIsolate(), worldTypeInMainThread(info.GetIsolate())));
    114         if (!window.IsEmpty())
    115             sourceArg = V8Window::toNative(window);
    116     }
    117     OwnPtr<MessagePortArray> portArray;
    118 
    119     const int portArrayIndex = 7;
    120     if (!isUndefinedOrNull(info[portArrayIndex])) {
    121         portArray = adoptPtr(new MessagePortArray);
    122         if (!getMessagePortArray(info[portArrayIndex], portArrayIndex + 1, *portArray, info.GetIsolate()))
    123             return;
    124     }
    125     event->initMessageEvent(typeArg, canBubbleArg, cancelableArg, originArg, lastEventIdArg, sourceArg, portArray.release());
    126 
    127     if (!dataArg.IsEmpty()) {
    128         info.Holder()->SetHiddenValue(V8HiddenPropertyName::data(info.GetIsolate()), dataArg);
    129         if (isolatedWorldForIsolate(info.GetIsolate()))
    130             event->setSerializedData(SerializedScriptValue::createAndSwallowExceptions(dataArg, info.GetIsolate()));
    131     }
    132 }
    133 
    134 void V8MessageEvent::webkitInitMessageEventMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
    135 {
    136     initMessageEventMethodCustom(info);
    137 }
    138 
    139 
    140 } // namespace WebCore
    141