示例#1
0
static bool js_equal(const QString &string, QV4::ValueRef value)
{
    if (value->isString())
        return string == value->stringValue()->toQString();
    if (value->isNumber())
        return __qmljs_string_to_number(string) == value->asDouble();
    if (value->isBoolean())
        return __qmljs_string_to_number(string) == value->booleanValue();
    if (value->isObject()) {
        Scope scope(value->objectValue()->engine());
        ScopedValue p(scope, __qmljs_to_primitive(value, PREFERREDTYPE_HINT));
        return js_equal(string, p);
    }
    return false;
}
QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QQmlContextData *context,
                                   const QV4::ValueRef function,
                                   QV4::CallData *callData,
                                   bool *isUndefined)
{
    Q_ASSERT(context && context->engine);

    if (function->isUndefined()) {
        if (isUndefined)
            *isUndefined = true;
        return QV4::Encode::undefined();
    }

    QQmlEnginePrivate *ep = QQmlEnginePrivate::get(context->engine);

    // All code that follows must check with watcher before it accesses data members
    // incase we have been deleted.
    DeleteWatcher watcher(this);

    Q_ASSERT(notifyOnValueChanged() || activeGuards.isEmpty());
    GuardCapture capture(context->engine, this, &watcher);

    QQmlEnginePrivate::PropertyCapture *lastPropertyCapture = ep->propertyCapture;
    ep->propertyCapture = notifyOnValueChanged()?&capture:0;


    if (notifyOnValueChanged())
        capture.guards.copyAndClearPrepend(activeGuards);

    QV4::ExecutionEngine *v4 = QV8Engine::getV4(ep->v8engine());
    QV4::Scope scope(v4);
    QV4::ScopedValue result(scope, QV4::Primitive::undefinedValue());
    QV4::ExecutionContext *ctx = v4->currentContext();
    callData->thisObject = v4->globalObject;
    if (scopeObject()) {
        QV4::ScopedValue value(scope, QV4::QObjectWrapper::wrap(ctx->d()->engine, scopeObject()));
        if (value->isObject())
            callData->thisObject = value;
    }

    result = function->asFunctionObject()->call(callData);
    if (scope.hasException()) {
        if (watcher.wasDeleted())
            ctx->catchException(); // ignore exception
        else
            delayedError()->catchJavaScriptException(ctx);
        if (isUndefined)
            *isUndefined = true;
    } else {
        if (isUndefined)
            *isUndefined = result->isUndefined();

        if (!watcher.wasDeleted() && hasDelayedError())
            delayedError()->clearError();
    }

    if (capture.errorString) {
        for (int ii = 0; ii < capture.errorString->count(); ++ii)
            qWarning("%s", qPrintable(capture.errorString->at(ii)));
        delete capture.errorString;
        capture.errorString = 0;
    }

    while (Guard *g = capture.guards.takeFirst())
        g->Delete();

    ep->propertyCapture = lastPropertyCapture;

    return result.asReturnedValue();
}
示例#3
0
void Serialize::serialize(QByteArray &data, const QV4::ValueRef v, QV8Engine *engine)
{
    QV4::ExecutionEngine *v4 = QV8Engine::getV4(engine);
    QV4::Scope scope(v4);

    if (v->isEmpty()) {
        Q_ASSERT(!"Serialize: got empty value");
    } else if (v->isUndefined()) {
        push(data, valueheader(WorkerUndefined));
    } else if (v->isNull()) {
        push(data, valueheader(WorkerNull));
    } else if (v->isBoolean()) {
        push(data, valueheader(v->booleanValue() == true ? WorkerTrue : WorkerFalse));
    } else if (v->isString()) {
        const QString &qstr = v->toQString();
        int length = qstr.length();
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        int utf16size = ALIGN(length * sizeof(uint16_t));

        reserve(data, utf16size + sizeof(quint32));
        push(data, valueheader(WorkerString, length));

        int offset = data.size();
        data.resize(data.size() + utf16size);
        char *buffer = data.data() + offset;

        memcpy(buffer, qstr.constData(), length*sizeof(QChar));
    } else if (v->asFunctionObject()) {
        // XXX TODO: Implement passing function objects between the main and
        // worker scripts
        push(data, valueheader(WorkerUndefined));
    } else if (v->asArrayObject()) {
        QV4::ScopedArrayObject array(scope, v);
        uint32_t length = array->getLength();
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        reserve(data, sizeof(quint32) + length * sizeof(quint32));
        push(data, valueheader(WorkerArray, length));
        ScopedValue val(scope);
        for (uint32_t ii = 0; ii < length; ++ii)
            serialize(data, (val = array->getIndexed(ii)), engine);
    } else if (v->isInteger()) {
        reserve(data, 2 * sizeof(quint32));
        push(data, valueheader(WorkerInt32));
        push(data, (quint32)v->integerValue());
//    } else if (v->IsUint32()) {
//        reserve(data, 2 * sizeof(quint32));
//        push(data, valueheader(WorkerUint32));
//        push(data, v->Uint32Value());
    } else if (v->isNumber()) {
        reserve(data, sizeof(quint32) + sizeof(double));
        push(data, valueheader(WorkerNumber));
        push(data, v->asDouble());
    } else if (QV4::DateObject *d = v->asDateObject()) {
        reserve(data, sizeof(quint32) + sizeof(double));
        push(data, valueheader(WorkerDate));
        push(data, d->date().asDouble());
    } else if (v->as<RegExpObject>()) {
        Scoped<RegExpObject> re(scope, v);
        quint32 flags = re->flags();
        QString pattern = re->source();
        int length = pattern.length() + 1;
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        int utf16size = ALIGN(length * sizeof(uint16_t));

        reserve(data, sizeof(quint32) + utf16size);
        push(data, valueheader(WorkerRegexp, flags));
        push(data, (quint32)length);

        int offset = data.size();
        data.resize(data.size() + utf16size);
        char *buffer = data.data() + offset;

        memcpy(buffer, pattern.constData(), length*sizeof(QChar));
    } else if (v->as<QV4::QObjectWrapper>()) {
        Scoped<QObjectWrapper> qobjectWrapper(scope, v);
        // XXX TODO: Generalize passing objects between the main thread and worker scripts so
        // that others can trivially plug in their elements.
        QQmlListModel *lm = qobject_cast<QQmlListModel *>(qobjectWrapper->object());
        if (lm && lm->agent()) {
            QQmlListModelWorkerAgent *agent = lm->agent();
            agent->addref();
            push(data, valueheader(WorkerListModel));
            push(data, (void *)agent);
            return;
        }
        // No other QObject's are allowed to be sent
        push(data, valueheader(WorkerUndefined));
    } else if (v->asObject()) {
        ScopedObject o(scope, v);
        if (o->isListType()) {
            // valid sequence.  we generate a length (sequence length + 1 for the sequence type)
            uint32_t seqLength = ScopedValue(scope, o->get(v4->id_length))->toUInt32();
            uint32_t length = seqLength + 1;
            if (length > 0xFFFFFF) {
                push(data, valueheader(WorkerUndefined));
                return;
            }
            reserve(data, sizeof(quint32) + length * sizeof(quint32));
            push(data, valueheader(WorkerSequence, length));
            serialize(data, QV4::Primitive::fromInt32(QV4::SequencePrototype::metaTypeForSequence(o)), engine); // sequence type
            ScopedValue val(scope);
            for (uint32_t ii = 0; ii < seqLength; ++ii)
                serialize(data, (val = o->getIndexed(ii)), engine); // sequence elements

            return;
        }

        // regular object
        QV4::ScopedValue val(scope, *v);
        QV4::ScopedArrayObject properties(scope, QV4::ObjectPrototype::getOwnPropertyNames(v4, val));
        quint32 length = properties->getLength();
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        push(data, valueheader(WorkerObject, length));

        QV4::ScopedValue s(scope);
        QV4::ScopedString str(scope);
        for (quint32 ii = 0; ii < length; ++ii) {
            s = properties->getIndexed(ii);
            serialize(data, s, engine);

            QV4::ExecutionContext *ctx = v4->currentContext();
            str = s;
            val = o->get(str.getPointer());
            if (scope.hasException())
                ctx->catchException();

            serialize(data, val, engine);
        }
        return;
    } else {
        push(data, valueheader(WorkerUndefined));
    }
}