V8MutationCallbackCustom.cpp   [plain text]

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#include "config.h"

#if ENABLE(MUTATION_OBSERVERS)

#include "V8MutationCallback.h"

#include "ScriptExecutionContext.h"
#include "V8Binding.h"
#include "V8CustomVoidCallback.h"
#include "V8MutationRecord.h"
#include "V8Proxy.h"
#include "V8WebKitMutationObserver.h"
#include <wtf/Assertions.h>
#include <wtf/GetPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>

namespace WebCore {

bool V8MutationCallback::handleEvent(MutationRecordArray* mutations, WebKitMutationObserver* observer)
{
    ASSERT(mutations);
    if (!mutations)
        return true;

    if (!canInvokeCallback())
        return true;

    v8::HandleScope handleScope;

    v8::Handle<v8::Context> v8Context = toV8Context(scriptExecutionContext(), m_worldContext);
    if (v8Context.IsEmpty())
        return true;

    v8::Context::Scope scope(v8Context);

    v8::Local<v8::Array> mutationsArray = v8::Array::New(mutations->size());
    for (size_t i = 0; i < mutations->size(); ++i)
        mutationsArray->Set(v8::Integer::New(i), toV8(mutations->at(i).get(), 0));

    v8::Handle<v8::Value> observerHandle = toV8(observer, 0);
    if (observerHandle.IsEmpty()) {
        if (!isScriptControllerTerminating())
            CRASH();
        return true;
    }

    if (!observerHandle->IsObject())
        return true;

    v8::Handle<v8::Value> argv[] = {
        mutationsArray,
        observerHandle
    };

    bool callbackReturnValue = false;
    return !invokeCallback(m_callback, v8::Handle<v8::Object>::Cast(observerHandle), 2, argv, callbackReturnValue, scriptExecutionContext());
}

} // namespace WebCore

#endif // ENABLE(MUTATION_OBSERVERS)