C++ JSObject::get方法代码示例

KJS::JSValue *SlotProxy::callMethod(const QByteArray &methodName, void **_a)
{
#ifdef DEBUG_SLOTPROXY
    qDebug() << "SlotProxy::callMethod(" << methodName << ",_a) obj=" << this;
#endif
    KJS::ExecState *exec = m_interpreter->globalExec();
    exec->clearException();

    // Crash
    // KJS::Interpreter::globalExec()->context().thisValue()
    KJS::List args = convertArguments(exec, _a);
    KJS::Identifier id = KJS::Identifier(KJS::UString(methodName.data()));
    KJS::JSObject *fun = m_object->get(exec, id)->toObject(exec);
    KJS::JSValue *retValue;
    if (!fun->implementsCall()) {
#ifdef DEBUG_SLOTPROXY
        qDebug() << "SlotProxy::callMethod got bad handler";
#endif
        QString msg = i18n("Bad slot handler: Object %1 Identifier %2 Method %3 Signature: %4.",
                           m_object->className().ascii(),
                           id.ascii(),
                           methodName.data(),
                           QString(m_signature));

        retValue = throwError(exec, KJS::TypeError, msg);
    } else {
        retValue = fun->call(exec, m_object, args);
    }

    if (exec->hadException()) {
#ifdef DEBUG_SLOTPROXY
        qDebug() << "SlotProxy::callMethod had exception";
#endif
        if (m_interpreter->shouldPrintExceptions()) {
            KJS::JSLock lock;
            KJS::JSObject *exceptObj = exec->exception()->toObject(exec);//retValue->toObject(exec);
            QString message = toQString(exceptObj->toString(exec));
            QString sourceURL = toQString(exceptObj->get(exec, "sourceURL")->toString(exec));
            int sourceId = exceptObj->get(exec, "sourceId")->toUInt32(exec);
            // would include the line number, but it's always last line of file
            int line = exceptObj->get(exec, "line")->toUInt32(exec);
            (*KJSEmbed::conerr()) << i18n("Exception calling '%1' slot from %2:%3:%4", QString(methodName), !sourceURL.isEmpty() ? sourceURL : QString::number(sourceId), line, message) << endl;
        }

        // clear it so it doesn't stop other things
        exec->clearException();

        return KJS::jsNull();
    } else {
        if (retValue->type() == 1 || retValue->type() == 0) {
            return KJS::jsNull();
        }
    }
    return retValue;
}

bool EventProxy::callHandler( QEvent *e )
{
// Be careful enabling this as if there are a lot of events then the event loop times
// out and the app crashes with 'Alarm Clock'.
//    qDebug("JSObjectEventProxy::callHandler() event type %d" , e->type() );

    KJS::ExecState *exec = m_interpreter->globalExec();
    KJS::Identifier id = JSEventMapper::mapper()->findEventHandler( e->type() );

    KJS::JSObject *jsobj(m_watch);
    KJS::JSObject *fun = jsobj->get(exec, id )->toObject( exec );

    KJS::JSValue *retValue;
    if ( !fun->implementsCall() )
    {
        QString msg = i18n( "Bad event handler: Object %1 Identifier %2 Method %3 Type: %4.",
          jsobj->className().ascii(),
          id.ascii(),
          fun->className().ascii(),
          e->type());
        retValue = throwError(exec, KJS::TypeError, msg);
    }
    else
    {
        // Process args
        KJS::List args;
        args.append( JSEventUtils::event(exec, e) );
        
        // Call handler
        retValue = fun->call( exec, jsobj, args );
    }
    
    if ( exec->hadException() ) 
    {
        if (m_interpreter->shouldPrintExceptions())
        {
            KJS::JSLock lock;
            KJS::JSObject* exceptObj = retValue->toObject(exec);
            QString message = toQString(exceptObj->toString(exec));
            QString sourceURL = toQString(exceptObj->get(exec, "sourceURL")->toString(exec));
            int sourceId = exceptObj->get(exec, "sourceId")->toUInt32(exec);
            int line = exceptObj->get(exec, "line")->toUInt32(exec);
            (*KJSEmbed::conerr()) << i18n("Exception calling '%1' function from %2:%3:%4", id.ascii(), !sourceURL.isEmpty() ? sourceURL : QString::number(sourceId), line, message) << endl;
        }
        
        
        // clear it so it doesn't stop other things
        exec->clearException();
        return false;
    }
  
    return true;
}

QDateTime convertDateToDateTime(KJS::ExecState *exec, KJS::JSValue *value)
{
    KJS::List args;
    QDateTime returnDateTime;
    KJS::JSObject *obj = value->toObject(exec);
    if (toQString(obj->className()) == "Date") {
        int seconds = int(obj->get(exec, KJS::Identifier("getSeconds"))->toObject(exec)->call(exec, obj, args)->toInteger(exec));
        int minutes = int(obj->get(exec, KJS::Identifier("getMinutes"))->toObject(exec)->call(exec, obj, args)->toInteger(exec));
        int hours = int(obj->get(exec, KJS::Identifier("getHours"))->toObject(exec)->call(exec, obj, args)->toInteger(exec));
        int month = int(obj->get(exec, KJS::Identifier("getMonth"))->toObject(exec)->call(exec, obj, args)->toInteger(exec));
        int day = int(obj->get(exec, KJS::Identifier("getDate"))->toObject(exec)->call(exec, obj, args)->toInteger(exec));
        int year = int(obj->get(exec, KJS::Identifier("getFullYear"))->toObject(exec)->call(exec, obj, args)->toInteger(exec));
        returnDateTime.setDate(QDate(year, month + 1, day));
        returnDateTime.setTime(QTime(hours, minutes, seconds));
    } else {
        // Throw error
    }

    return returnDateTime;
}

QMap<QString, QVariant> KJSEmbed::convertArrayToMap(KJS::ExecState *exec, KJS::JSValue *value)
{
    QMap<QString, QVariant> returnMap;
    KJS::JSObject *obj = value->toObject(exec);
    KJS::PropertyNameArray lst;
    obj->getPropertyNames(exec, lst);
    KJS::PropertyNameArrayIterator idx = lst.begin();
    for (; idx != lst.end(); idx++) {
        KJS::Identifier id = *idx;
        KJS::JSValue *val  = obj->get(exec, id);
        returnMap[toQString(id)] = convertToVariant(exec, val);
    }
    return returnMap;
}

KJS::JSValue *Engine::callMethod( const KJS::UString &methodName, const KJS::List &args )
{
    KJS::JSObject *global = dptr->m_interpreter->globalObject();
    KJS::ExecState *exec = dptr->m_interpreter->globalExec();

    KJS::Identifier id = KJS::Identifier( KJS::UString( methodName ) );
    KJS::JSObject *fun = global->get( exec, id )->toObject( exec );
    KJS::JSValue *retValue;

    if ( !fun->implementsCall() ) {
        QString msg = i18n( "%1 is not a function and cannot be called.", toQString(methodName) );
        return throwError( exec, KJS::TypeError, msg );
    }

    retValue = fun->call( exec, global, args );

    if( exec->hadException() )
        return exec->exception();

    return retValue;
}

JavaScriptArrayType checkArray(KJS::ExecState *exec, KJS::JSValue *val)
{
    KJS::JSObject *obj = val->toObject(exec);
    if (toQString(obj->className()) == "Array") {
        if (!obj->hasProperty(exec, KJS::Identifier("length"))) {
            return Map;
        }
        KJS::JSValue *jslen = obj->get(exec, KJS::Identifier("length"));
        const int len = jslen->toNumber(exec);
        if (len > 0) {
            QByteArray buff;
            buff.setNum(len - 1);
            if (!obj->hasProperty(exec, KJS::Identifier(buff.data()))) {
                return Map;
            }
        }
        return List;
    } else {
        return None;
    }
}

QModelIndex KJSObjectModel::index(int row, int column, const QModelIndex &parent ) const
{
    KJS::JSObject *parentInstance = 0;
    Node *childItem = 0;
    KJS::ExecState *exec = m_js->globalExec();

    if (!parent.isValid())
    {
        if (m_root)
            parentInstance = m_root;
        else
            return QModelIndex();
    }
    else
        parentInstance = static_cast<Node*>(parent.internalPointer())->instance;
    int idx = 0;
    KJS::PropertyNameArray props;
    parentInstance->getPropertyNames(exec, props);
    for( KJS::PropertyNameArrayIterator ref = props.begin(); ref != props.end(); ref++)
    {
        if( idx == row)
        {
                childItem = new Node;
                childItem->name = ref->ascii(); //### M.O.: this is wrong, can be unicode.
                childItem->instance = parentInstance->get( exec,
                        childItem->name.constData() )->toObject(exec);
                childItem->parent = static_cast<Node*>(parent.internalPointer());
                break;
        }
        ++idx;
    }
    if (childItem)
        return createIndex(row, column, childItem);

    return QModelIndex();
}

// from khtml/ecma/debugger/debugwindow.cpp
static QString exceptionToString(KJS::ExecState* exec, KJS::JSValue* exceptionObj)
{
    QString exceptionMsg = valueToString(exceptionObj);

    // Since we purposefully bypass toString, we need to figure out
    // string serialization ourselves.
    //### might be easier to export class info for ErrorInstance ---

    KJS::JSObject* valueObj = exceptionObj->getObject();
    KJS::JSValue*  protoObj = valueObj ? valueObj->prototype() : 0;

    bool exception   = false;
    bool syntaxError = false;
    if (protoObj == exec->lexicalInterpreter()->builtinSyntaxErrorPrototype())
    {
        exception   = true;
        syntaxError = true;
    }

    if (protoObj == exec->lexicalInterpreter()->builtinErrorPrototype()          ||
        protoObj == exec->lexicalInterpreter()->builtinEvalErrorPrototype()      ||
        protoObj == exec->lexicalInterpreter()->builtinReferenceErrorPrototype() ||
        protoObj == exec->lexicalInterpreter()->builtinRangeErrorPrototype()     ||
        protoObj == exec->lexicalInterpreter()->builtinTypeErrorPrototype()      ||
        protoObj == exec->lexicalInterpreter()->builtinURIErrorPrototype())
    {
        exception = true;
    }

    if (!exception)
        return exceptionMsg;

    // Clear exceptions temporarily so we can get/call a few things.
    // We memorize the old exception first, of course. Note that
    // This is not always the same as exceptionObj since we may be
    //  asked to translate a non-active exception
    KJS::JSValue* oldExceptionObj = exec->exception();
    exec->clearException();

    // We want to serialize the syntax errors ourselves, to provide the line number.
    // The URL is in "sourceURL" and the line is in "line"
    // ### TODO: Perhaps we want to use 'sourceId' in case of eval contexts.
    if (syntaxError)
    {
        KJS::JSValue* lineValue = valueObj->get(exec, "line");
        KJS::JSValue* urlValue  = valueObj->get(exec, "sourceURL");

        int      line = lineValue->toNumber(exec);
        QString  url  = urlValue->toString(exec).qstring();
        exceptionMsg = i18n("Parse error at %1 line %2",
                            url, line + 1);
    }
    else
    {
        // ### it's still not 100% safe to call toString here, even on
        // native exception objects, since someone might have changed the toString property
        // of the exception prototype, but I'll punt on this case for now.
        exceptionMsg = exceptionObj->toString(exec).qstring();
    }
    exec->setException(oldExceptionObj);
    return exceptionMsg;
}