Source/WebCore/bindings/v8/custom/V8MutationObserverCustom.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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 * 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
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#include "config.h"

#if ENABLE(MUTATION_OBSERVERS)

#include "V8MutationObserver.h"

#include "ExceptionCode.h"
#include "MutationObserver.h"
#include "V8Binding.h"
#include "V8DOMWrapper.h"
#include "V8MutationCallback.h"
#include "V8Utilities.h"

namespace WebCore {

v8::Handle<v8::Value> V8MutationObserver::constructorCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.MutationObserver.Constructor");

    if (!args.IsConstructCall())
        return throwTypeError("DOM object constructor cannot be called as a function.", args.GetIsolate());

    if (ConstructorMode::current() == ConstructorMode::WrapExistingObject)
        return args.Holder();

    if (args.Length() < 1)
        return throwNotEnoughArgumentsError(args.GetIsolate());

    v8::Local<v8::Value> arg = args[0];
    if (!arg->IsObject())
        return setDOMException(TYPE_MISMATCH_ERR, args.GetIsolate());

    ScriptExecutionContext* context = getScriptExecutionContext();

    RefPtr<MutationCallback> callback = V8MutationCallback::create(arg, context);
    RefPtr<MutationObserver> observer = MutationObserver::create(callback.release());

    v8::Handle<v8::Object> wrapper = args.Holder();
    V8DOMWrapper::createDOMWrapper(observer.release(), &info, wrapper);
    return wrapper;
}

} // namespace WebCore

#endif // ENABLE(MUTATION_OBSERVERS)