Source/WebCore/bindings/v8/custom/V8MessageEventCustom.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#include "config.h"
#include "V8MessageEvent.h"

#include "MessageEvent.h"
#include "SerializedScriptValue.h"

#include "V8ArrayBuffer.h"
#include "V8Binding.h"
#include "V8Blob.h"
#include "V8DOMWindow.h"
#include "V8MessagePort.h"

namespace WebCore {

v8::Handle<v8::Value> V8MessageEvent::dataAccessorGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    INC_STATS("DOM.MessageEvent.data");
    MessageEvent* event = V8MessageEvent::toNative(info.Holder());

    v8::Handle<v8::Value> result;
    switch (event->dataType()) {
    case MessageEvent::DataTypeScriptValue: {
        ScriptValue scriptValue = event->dataAsScriptValue();
        if (scriptValue.hasNoValue())
            result = v8::Null(info.GetIsolate());
        else
            result = v8::Local<v8::Value>::New(scriptValue.v8Value());
        break;
    }

    case MessageEvent::DataTypeSerializedScriptValue:
        if (SerializedScriptValue* serializedValue = event->dataAsSerializedScriptValue())
            result = serializedValue->deserialize(event->ports(), info.GetIsolate());
        else
            result = v8::Null(info.GetIsolate());
        break;

    case MessageEvent::DataTypeString: {
        String stringValue = event->dataAsString();
        result = v8String(stringValue);
        break;
    }

    case MessageEvent::DataTypeBlob:
        result = toV8(event->dataAsBlob(), info.Holder(), info.GetIsolate());
        break;

    case MessageEvent::DataTypeArrayBuffer:
        result = toV8(event->dataAsArrayBuffer(), info.Holder(), info.GetIsolate());
        break;
    }

    // Overwrite the data attribute so it returns the cached result in future invocations.
    // This custom handler (dataAccessGetter) will not be called again.
    v8::PropertyAttribute dataAttr = static_cast<v8::PropertyAttribute>(v8::DontDelete | v8::ReadOnly);
    info.Holder()->ForceSet(name, result, dataAttr);
    return result;
}

v8::Handle<v8::Value> V8MessageEvent::portsAccessorGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    INC_STATS("DOM.MessageEvent.ports");
    MessageEvent* event = V8MessageEvent::toNative(info.Holder());

    MessagePortArray* ports = event->ports();
    if (!ports)
        return v8::Array::New(0);

    MessagePortArray portsCopy(*ports);

    v8::Local<v8::Array> portArray = v8::Array::New(portsCopy.size());
    for (size_t i = 0; i < portsCopy.size(); ++i)
        portArray->Set(v8Integer(i, info.GetIsolate()), toV8(portsCopy[i].get(), info.Holder(), info.GetIsolate()));

    return portArray;
}

v8::Handle<v8::Value> V8MessageEvent::initMessageEventCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.MessageEvent.initMessageEvent");
    MessageEvent* event = V8MessageEvent::toNative(args.Holder());
    String typeArg = toWebCoreString(args[0]);
    bool canBubbleArg = args[1]->BooleanValue();
    bool cancelableArg = args[2]->BooleanValue();
    ScriptValue dataArg = ScriptValue(args[3]);
    String originArg = toWebCoreString(args[4]);
    String lastEventIdArg = toWebCoreString(args[5]);

    DOMWindow* sourceArg = 0;
    if (args[6]->IsObject()) {
        v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(args[6]);
        v8::Handle<v8::Object> window = V8DOMWrapper::lookupDOMWrapper(V8DOMWindow::GetTemplate(), wrapper);
        if (!window.IsEmpty())
            sourceArg = V8DOMWindow::toNative(window);
    }
    OwnPtr<MessagePortArray> portArray;

    if (!isUndefinedOrNull(args[7])) {
        portArray = adoptPtr(new MessagePortArray);
        if (!getMessagePortArray(args[7], *portArray, args.GetIsolate()))
            return v8::Undefined();
    }
    event->initMessageEvent(typeArg, canBubbleArg, cancelableArg, dataArg, originArg, lastEventIdArg, sourceArg, portArray.release());
    return v8::Undefined();
}

v8::Handle<v8::Value> V8MessageEvent::webkitInitMessageEventCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.MessageEvent.webkitInitMessageEvent");
    return initMessageEventCallback(args);
}


} // namespace WebCore