src/third_party/blink/Source/bindings/core/v8/custom/V8MutationObserverCustom.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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#include "config.h"
#include "bindings/core/v8/V8MutationObserver.h"

#include "bindings/core/v8/ExceptionMessages.h"
#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/core/v8/V8DOMWrapper.h"
#include "bindings/core/v8/V8GCController.h"
#include "bindings/core/v8/V8MutationCallback.h"
#include "core/dom/MutationObserver.h"
#include "core/dom/Node.h"

namespace blink {

void V8MutationObserver::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
{
    ExceptionState exceptionState(ExceptionState::ConstructionContext, "MutationObserver", info.Holder(), info.GetIsolate());
    if (info.Length() < 1) {
        exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
        exceptionState.throwIfNeeded();
        return;
    }

    v8::Local<v8::Value> arg = info[0];
    if (!arg->IsFunction()) {
        exceptionState.throwTypeError("Callback argument must be a function");
        exceptionState.throwIfNeeded();
        return;
    }

    v8::Handle<v8::Object> wrapper = info.Holder();

    OwnPtr<MutationCallback> callback = V8MutationCallback::create(v8::Handle<v8::Function>::Cast(arg), wrapper, ScriptState::current(info.GetIsolate()));
    RefPtrWillBeRawPtr<MutationObserver> observer = MutationObserver::create(callback.release());

    V8DOMWrapper::associateObjectWithWrapper<V8MutationObserver>(observer.release(), &wrapperTypeInfo, wrapper, info.GetIsolate());
    info.GetReturnValue().Set(wrapper);
}

void V8MutationObserver::visitDOMWrapper(v8::Isolate* isolate, ScriptWrappableBase* scriptWrappableBase, const v8::Persistent<v8::Object>& wrapper)
{
    MutationObserver* observer = scriptWrappableBase->toImpl<MutationObserver>();
    WillBeHeapHashSet<RawPtrWillBeMember<Node> > observedNodes = observer->getObservedNodes();
    for (WillBeHeapHashSet<RawPtrWillBeMember<Node> >::iterator it = observedNodes.begin(); it != observedNodes.end(); ++it) {
        v8::UniqueId id(reinterpret_cast<intptr_t>(V8GCController::opaqueRootForGC(isolate, *it)));
        isolate->SetReferenceFromGroup(id, wrapper);
    }
}

} // namespace blink