sky/engine/bindings-dart/core/dart/DartCallback.cpp

/*
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#include "config.h"
#include "bindings/core/dart/DartCallback.h"

#include "bindings/core/dart/DartController.h"
#include "bindings/core/dart/DartDOMData.h"
#include "bindings/core/dart/DartUtilities.h"

namespace blink {

DartCallback::DartCallback(Dart_Handle object, Dart_Handle& exception)
{
    if (!Dart_IsClosure(object)) {
        exception = Dart_NewStringFromCString("Callback must be a function");
        m_callback = 0;
        return;
    }
    m_callback = Dart_NewPersistentHandle(object);
}

DartCallback::~DartCallback()
{
    if (!m_callback || !isIsolateAlive())
        return;

    DartIsolateScope scope(isolate());
    Dart_DeletePersistentHandle(m_callback);
}

bool DartCallback::handleEvent(int argc, Dart_Handle* argv)
{
    ASSERT(isolate() == Dart_CurrentIsolate());
    ASSERT(m_callback);

    ExecutionContext* context = DartDOMData::current()->scriptExecutionContext();
    DartController* dartController = DartController::retrieve(context);

    Dart_Handle result = dartController->callFunction(Dart_HandleFromPersistent(m_callback), argc, argv);
    if (Dart_IsError(result)) {
        DartUtilities::reportProblem(context, result);
        return false;
    }

    return true;
}

}