void QQmlBind::eval()
{
Q_D(QQmlBind);
if (!d->prop.isValid() || d->value.isNull || !d->componentComplete)
return;
if (d->when.isValid()) {
if (!d->when) {
//restore any previous binding
if (d->prevBind) {
QQmlAbstractBinding *tmp = d->prevBind;
d->prevBind = 0;
tmp = QQmlPropertyPrivate::setBinding(d->prop, tmp);
if (tmp) //should this ever be true?
tmp->destroy();
}
return;
}
//save any set binding for restoration
QQmlAbstractBinding *tmp;
tmp = QQmlPropertyPrivate::setBinding(d->prop, 0);
if (tmp && d->prevBind)
tmp->destroy();
else if (!d->prevBind)
d->prevBind = tmp;
}
d->prop.write(d->value.value);
}
void QQmlValueTypeProxyBinding::setEnabled(bool e, QQmlPropertyData::WriteFlags flags)
{
QQmlAbstractBinding *b = m_bindings.data();
while (b) {
b->setEnabled(e, flags);
b = b->nextBinding();
}
}
QQmlValueTypeProxyBinding::~QQmlValueTypeProxyBinding()
{
QQmlAbstractBinding *binding = m_bindings.data();
while (binding) {
binding->setAddedToObject(false);
binding = binding->nextBinding();
}
}
QQmlAbstractBinding *QQmlValueTypeProxyBinding::binding(int propertyIndex)
{
QQmlAbstractBinding *binding = m_bindings;
while (binding && binding->propertyIndex() != propertyIndex)
binding = binding->nextBinding();
return binding;
}
QQmlAbstractBinding *QQmlValueTypeProxyBinding::binding(QQmlPropertyIndex propertyIndex) const
{
QQmlAbstractBinding *binding = m_bindings.data();
while (binding && binding->targetPropertyIndex() != propertyIndex)
binding = binding->nextBinding();
return binding;
}
QQmlValueTypeProxyBinding::~QQmlValueTypeProxyBinding()
{
QQmlAbstractBinding *binding = m_bindings;
// This must be identical to the logic in QQmlData::destroyed()
while (binding) {
QQmlAbstractBinding *next = binding->nextBinding();
binding->setAddedToObject(false);
binding->setNextBinding(0);
binding->destroy();
binding = next;
}
}
/*!
Removes a collection of bindings, corresponding to the set bits in \a mask.
*/
void QQmlValueTypeProxyBinding::removeBindings(quint32 mask)
{
QQmlAbstractBinding *binding = m_bindings.data();
QQmlAbstractBinding *lastBinding = 0;
while (binding) {
const int valueTypeIndex = binding->targetPropertyIndex().valueTypeIndex();
if (valueTypeIndex != -1 && (mask & (1 << valueTypeIndex))) {
QQmlAbstractBinding *remove = binding;
remove->setAddedToObject(false);
binding = remove->nextBinding();
if (lastBinding == 0)
m_bindings = remove->nextBinding();
else
lastBinding->setNextBinding(remove->nextBinding());
} else {
lastBinding = binding;
binding = binding->nextBinding();
}
}
}
void QQmlValueTypeWrapper::put(Managed *m, String *name, const Value &value)
{
Q_ASSERT(m->as<QQmlValueTypeWrapper>());
ExecutionEngine *v4 = static_cast<QQmlValueTypeWrapper *>(m)->engine();
Scope scope(v4);
if (scope.hasException())
return;
Scoped<QQmlValueTypeWrapper> r(scope, static_cast<QQmlValueTypeWrapper *>(m));
Scoped<QQmlValueTypeReference> reference(scope, m->d());
int writeBackPropertyType = -1;
if (reference) {
QMetaProperty writebackProperty = reference->d()->object->metaObject()->property(reference->d()->property);
if (!writebackProperty.isWritable() || !reference->readReferenceValue())
return;
writeBackPropertyType = writebackProperty.userType();
}
const QMetaObject *metaObject = r->d()->propertyCache->metaObject();
const QQmlPropertyData *pd = r->d()->propertyCache->property(name, 0, 0);
if (!pd)
return;
QMetaProperty property = metaObject->property(pd->coreIndex);
Q_ASSERT(property.isValid());
QQmlBinding *newBinding = 0;
QV4::ScopedFunctionObject f(scope, value);
if (reference && f) {
if (!f->isBinding()) {
// assigning a JS function to a non-var-property is not allowed.
QString error = QStringLiteral("Cannot assign JavaScript function to value-type property");
ScopedString e(scope, v4->newString(error));
v4->throwError(e);
return;
}
QQmlContextData *context = QmlContextWrapper::callingContext(v4);
QQmlPropertyData cacheData;
cacheData.setFlags(QQmlPropertyData::IsWritable |
QQmlPropertyData::IsValueTypeVirtual);
cacheData.propType = writeBackPropertyType;
cacheData.coreIndex = reference->d()->property;
cacheData.valueTypeFlags = 0;
cacheData.valueTypeCoreIndex = pd->coreIndex;
cacheData.valueTypePropType = property.userType();
QV4::Scoped<QQmlBindingFunction> bindingFunction(scope, (const Value &)f);
bindingFunction->initBindingLocation();
newBinding = new QQmlBinding(value, reference->d()->object, context);
newBinding->setTarget(reference->d()->object, cacheData, context);
}
if (reference) {
QQmlAbstractBinding *oldBinding =
QQmlPropertyPrivate::setBinding(reference->d()->object, reference->d()->property, pd->coreIndex, newBinding);
if (oldBinding)
oldBinding->destroy();
}
if (newBinding)
return;
QVariant v = v4->toVariant(value, property.userType());
if (property.isEnumType() && (QMetaType::Type)v.type() == QMetaType::Double)
v = v.toInt();
void *gadget = r->d()->gadgetPtr;
property.writeOnGadget(gadget, v);
if (reference) {
if (writeBackPropertyType == QMetaType::QVariant) {
QVariant variantReferenceValue = r->d()->toVariant();
int flags = 0;
int status = -1;
void *a[] = { &variantReferenceValue, 0, &status, &flags };
QMetaObject::metacall(reference->d()->object, QMetaObject::WriteProperty, reference->d()->property, a);
} else {
int flags = 0;
int status = -1;
void *a[] = { r->d()->gadgetPtr, 0, &status, &flags };
QMetaObject::metacall(reference->d()->object, QMetaObject::WriteProperty, reference->d()->property, a);
}
}
}
/*!
Removes a collection of bindings, corresponding to the set bits in \a mask.
*/
void QQmlValueTypeProxyBinding::removeBindings(quint32 mask)
{
QQmlAbstractBinding *binding = m_bindings;
QQmlAbstractBinding *lastBinding = 0;
while (binding) {
int valueTypeIndex = QQmlPropertyData::decodeValueTypePropertyIndex(binding->propertyIndex());
if (valueTypeIndex != -1 && (mask & (1 << valueTypeIndex))) {
QQmlAbstractBinding *remove = binding;
binding = remove->nextBinding();
if (lastBinding == 0)
m_bindings = remove->nextBinding();
else
lastBinding->setNextBinding(remove->nextBinding());
remove->setAddedToObject(false);
remove->setNextBinding(0);
remove->destroy();
} else {
lastBinding = binding;
binding = binding->nextBinding();
}
}
}
void tst_QQmlEngineDebugService::recursiveObjectTest(
QObject *o, const QmlDebugObjectReference &oref, bool recursive) const
{
const QMetaObject *meta = o->metaObject();
QQmlType *type = QQmlMetaType::qmlType(meta);
QString className = type ? QString(type->qmlTypeName())
: QString(meta->className());
className = className.mid(className.lastIndexOf(QLatin1Char('/'))+1);
QCOMPARE(oref.debugId, QQmlDebugService::idForObject(o));
QCOMPARE(oref.name, o->objectName());
QCOMPARE(oref.className, className);
QCOMPARE(oref.contextDebugId, QQmlDebugService::idForObject(
qmlContext(o)));
const QObjectList &children = o->children();
for (int i=0; i<children.count(); i++) {
QObject *child = children[i];
if (!qmlContext(child))
continue;
int debugId = QQmlDebugService::idForObject(child);
QVERIFY(debugId >= 0);
QmlDebugObjectReference cref;
foreach (const QmlDebugObjectReference &ref, oref.children) {
if (ref.debugId == debugId) {
cref = ref;
break;
}
}
QVERIFY(cref.debugId >= 0);
if (recursive)
recursiveObjectTest(child, cref, true);
}
foreach (const QmlDebugPropertyReference &p, oref.properties) {
QCOMPARE(p.objectDebugId, QQmlDebugService::idForObject(o));
// signal properties are fake - they are generated from QQmlAbstractBoundSignal children
if (p.name.startsWith("on") && p.name.length() > 2 && p.name[2].isUpper()) {
QString signal = p.value.toString();
QQmlBoundSignalExpression *expr = QQmlPropertyPrivate::signalExpression(QQmlProperty(o, p.name));
QVERIFY(expr && expr->expression() == signal);
QVERIFY(p.valueTypeName.isEmpty());
QVERIFY(p.binding.isEmpty());
QVERIFY(!p.hasNotifySignal);
continue;
}
QMetaProperty pmeta = meta->property(meta->indexOfProperty(p.name.toUtf8().constData()));
QCOMPARE(p.name, QString::fromUtf8(pmeta.name()));
if (pmeta.type() < QVariant::UserType && pmeta.userType() !=
QMetaType::QVariant) // TODO test complex types
QCOMPARE(p.value , pmeta.read(o));
if (p.name == "parent")
QVERIFY(p.valueTypeName == "QGraphicsObject*" ||
p.valueTypeName == "QQuickItem*");
else
QCOMPARE(p.valueTypeName, QString::fromUtf8(pmeta.typeName()));
QQmlAbstractBinding *binding =
QQmlPropertyPrivate::binding(
QQmlProperty(o, p.name));
if (binding)
QCOMPARE(binding->expression(), p.binding);
QCOMPARE(p.hasNotifySignal, pmeta.hasNotifySignal());
QVERIFY(pmeta.isValid());
}
}
int QQmlVMEMetaObject::metaCall(QMetaObject::Call c, int _id, void **a)
{
int id = _id;
if (c == QMetaObject::WriteProperty && interceptors &&
!(*reinterpret_cast<int*>(a[3]) & QQmlPropertyPrivate::BypassInterceptor)) {
for (QQmlPropertyValueInterceptor *vi = interceptors; vi; vi = vi->m_next) {
if (vi->m_coreIndex != id)
continue;
int valueIndex = vi->m_valueTypeCoreIndex;
int type = QQmlData::get(object)->propertyCache->property(id)->propType;
if (type != QVariant::Invalid) {
if (valueIndex != -1) {
QQmlValueType *valueType = QQmlValueTypeFactory::valueType(type);
Q_ASSERT(valueType);
//
// Consider the following case:
// color c = { 0.1, 0.2, 0.3 }
// interceptor exists on c.r
// write { 0.2, 0.4, 0.6 }
//
// The interceptor may choose not to update the r component at this
// point (for example, a behavior that creates an animation). But we
// need to ensure that the g and b components are updated correctly.
//
// So we need to perform a full write where the value type is:
// r = old value, g = new value, b = new value
//
// And then call the interceptor which may or may not write the
// new value to the r component.
//
// This will ensure that the other components don't contain stale data
// and any relevant signals are emitted.
//
// To achieve this:
// (1) Store the new value type as a whole (needed due to
// aliasing between a[0] and static storage in value type).
// (2) Read the entire existing value type from object -> valueType temp.
// (3) Read the previous value of the component being changed
// from the valueType temp.
// (4) Write the entire new value type into the temp.
// (5) Overwrite the component being changed with the old value.
// (6) Perform a full write to the value type (which may emit signals etc).
// (7) Issue the interceptor call with the new component value.
//
QMetaProperty valueProp = valueType->metaObject()->property(valueIndex);
QVariant newValue(type, a[0]);
valueType->read(object, id);
QVariant prevComponentValue = valueProp.read(valueType);
valueType->setValue(newValue);
QVariant newComponentValue = valueProp.read(valueType);
// Don't apply the interceptor if the intercepted value has not changed
bool updated = false;
if (newComponentValue != prevComponentValue) {
valueProp.write(valueType, prevComponentValue);
valueType->write(object, id, QQmlPropertyPrivate::DontRemoveBinding | QQmlPropertyPrivate::BypassInterceptor);
vi->write(newComponentValue);
updated = true;
}
if (updated)
return -1;
} else {
vi->write(QVariant(type, a[0]));
return -1;
}
}
}
}
if (c == QMetaObject::ReadProperty || c == QMetaObject::WriteProperty || c == QMetaObject::ResetProperty) {
if (id >= propOffset()) {
id -= propOffset();
if (id < metaData->propertyCount) {
int t = (metaData->propertyData() + id)->propertyType;
bool needActivate = false;
if (id >= firstVarPropertyIndex) {
Q_ASSERT(t == QMetaType::QVariant);
// the context can be null if accessing var properties from cpp after re-parenting an item.
QQmlEnginePrivate *ep = (ctxt == 0 || ctxt->engine == 0) ? 0 : QQmlEnginePrivate::get(ctxt->engine);
QV8Engine *v8e = (ep == 0) ? 0 : ep->v8engine();
if (v8e) {
if (c == QMetaObject::ReadProperty) {
*reinterpret_cast<QVariant *>(a[0]) = readPropertyAsVariant(id);
} else if (c == QMetaObject::WriteProperty) {
writeProperty(id, *reinterpret_cast<QVariant *>(a[0]));
}
} else if (c == QMetaObject::ReadProperty) {
// if the context was disposed, we just return an invalid variant from read.
*reinterpret_cast<QVariant *>(a[0]) = QVariant();
}
} else {
if (c == QMetaObject::ReadProperty) {
switch(t) {
case QVariant::Int:
*reinterpret_cast<int *>(a[0]) = data[id].asInt();
break;
case QVariant::Bool:
*reinterpret_cast<bool *>(a[0]) = data[id].asBool();
break;
case QVariant::Double:
*reinterpret_cast<double *>(a[0]) = data[id].asDouble();
break;
case QVariant::String:
*reinterpret_cast<QString *>(a[0]) = data[id].asQString();
break;
case QVariant::Url:
*reinterpret_cast<QUrl *>(a[0]) = data[id].asQUrl();
break;
case QVariant::Date:
*reinterpret_cast<QDate *>(a[0]) = data[id].asQDate();
break;
case QVariant::DateTime:
*reinterpret_cast<QDateTime *>(a[0]) = data[id].asQDateTime();
break;
case QVariant::RectF:
*reinterpret_cast<QRectF *>(a[0]) = data[id].asQRectF();
break;
case QVariant::SizeF:
*reinterpret_cast<QSizeF *>(a[0]) = data[id].asQSizeF();
break;
case QVariant::PointF:
*reinterpret_cast<QPointF *>(a[0]) = data[id].asQPointF();
break;
case QMetaType::QObjectStar:
*reinterpret_cast<QObject **>(a[0]) = data[id].asQObject();
break;
case QMetaType::QVariant:
*reinterpret_cast<QVariant *>(a[0]) = readPropertyAsVariant(id);
break;
default:
QQml_valueTypeProvider()->readValueType(data[id].dataType(), data[id].dataPtr(), data->dataSize(), t, a[0]);
break;
}
if (t == qMetaTypeId<QQmlListProperty<QObject> >()) {
int listIndex = data[id].asInt();
const List *list = &listProperties.at(listIndex);
*reinterpret_cast<QQmlListProperty<QObject> *>(a[0]) =
QQmlListProperty<QObject>(object, (void *)list,
list_append, list_count, list_at,
list_clear);
}
} else if (c == QMetaObject::WriteProperty) {
switch(t) {
case QVariant::Int:
needActivate = *reinterpret_cast<int *>(a[0]) != data[id].asInt();
data[id].setValue(*reinterpret_cast<int *>(a[0]));
break;
case QVariant::Bool:
needActivate = *reinterpret_cast<bool *>(a[0]) != data[id].asBool();
data[id].setValue(*reinterpret_cast<bool *>(a[0]));
break;
case QVariant::Double:
needActivate = *reinterpret_cast<double *>(a[0]) != data[id].asDouble();
data[id].setValue(*reinterpret_cast<double *>(a[0]));
break;
case QVariant::String:
needActivate = *reinterpret_cast<QString *>(a[0]) != data[id].asQString();
data[id].setValue(*reinterpret_cast<QString *>(a[0]));
break;
case QVariant::Url:
needActivate = *reinterpret_cast<QUrl *>(a[0]) != data[id].asQUrl();
data[id].setValue(*reinterpret_cast<QUrl *>(a[0]));
break;
case QVariant::Date:
needActivate = *reinterpret_cast<QDate *>(a[0]) != data[id].asQDate();
data[id].setValue(*reinterpret_cast<QDate *>(a[0]));
break;
case QVariant::DateTime:
needActivate = *reinterpret_cast<QDateTime *>(a[0]) != data[id].asQDateTime();
data[id].setValue(*reinterpret_cast<QDateTime *>(a[0]));
break;
case QVariant::RectF:
needActivate = *reinterpret_cast<QRectF *>(a[0]) != data[id].asQRectF();
data[id].setValue(*reinterpret_cast<QRectF *>(a[0]));
break;
case QVariant::SizeF:
needActivate = *reinterpret_cast<QSizeF *>(a[0]) != data[id].asQSizeF();
data[id].setValue(*reinterpret_cast<QSizeF *>(a[0]));
break;
case QVariant::PointF:
needActivate = *reinterpret_cast<QPointF *>(a[0]) != data[id].asQPointF();
data[id].setValue(*reinterpret_cast<QPointF *>(a[0]));
break;
case QMetaType::QObjectStar:
needActivate = *reinterpret_cast<QObject **>(a[0]) != data[id].asQObject();
data[id].setValue(*reinterpret_cast<QObject **>(a[0]), this, id);
break;
case QMetaType::QVariant:
writeProperty(id, *reinterpret_cast<QVariant *>(a[0]));
break;
default:
data[id].ensureValueType(t);
needActivate = !QQml_valueTypeProvider()->equalValueType(t, a[0], data[id].dataPtr(), data[id].dataSize());
QQml_valueTypeProvider()->writeValueType(t, a[0], data[id].dataPtr(), data[id].dataSize());
break;
}
}
}
if (c == QMetaObject::WriteProperty && needActivate) {
activate(object, methodOffset() + id, 0);
}
return -1;
}
id -= metaData->propertyCount;
if (id < metaData->aliasCount) {
QQmlVMEMetaData::AliasData *d = metaData->aliasData() + id;
if (d->flags & QML_ALIAS_FLAG_PTR && c == QMetaObject::ReadProperty)
*reinterpret_cast<void **>(a[0]) = 0;
if (!ctxt) return -1;
QQmlContext *context = ctxt->asQQmlContext();
QQmlContextPrivate *ctxtPriv = QQmlContextPrivate::get(context);
QObject *target = ctxtPriv->data->idValues[d->contextIdx].data();
if (!target)
return -1;
connectAlias(id);
if (d->isObjectAlias()) {
*reinterpret_cast<QObject **>(a[0]) = target;
return -1;
}
// Remove binding (if any) on write
if(c == QMetaObject::WriteProperty) {
int flags = *reinterpret_cast<int*>(a[3]);
if (flags & QQmlPropertyPrivate::RemoveBindingOnAliasWrite) {
QQmlData *targetData = QQmlData::get(target);
if (targetData && targetData->hasBindingBit(d->propertyIndex())) {
QQmlAbstractBinding *binding = QQmlPropertyPrivate::setBinding(target, d->propertyIndex(), d->isValueTypeAlias()?d->valueTypeIndex():-1, 0);
if (binding) binding->destroy();
}
}
}
if (d->isValueTypeAlias()) {
// Value type property
QQmlValueType *valueType = QQmlValueTypeFactory::valueType(d->valueType());
Q_ASSERT(valueType);
valueType->read(target, d->propertyIndex());
int rv = QMetaObject::metacall(valueType, c, d->valueTypeIndex(), a);
if (c == QMetaObject::WriteProperty)
valueType->write(target, d->propertyIndex(), 0x00);
return rv;
} else {
return QMetaObject::metacall(target, c, d->propertyIndex(), a);
}
}
return -1;
}
} else if(c == QMetaObject::InvokeMetaMethod) {
if (id >= methodOffset()) {
id -= methodOffset();
int plainSignals = metaData->signalCount + metaData->propertyCount +
metaData->aliasCount;
if (id < plainSignals) {
activate(object, _id, a);
return -1;
}
id -= plainSignals;
if (id < metaData->methodCount) {
if (!ctxt->engine)
return -1; // We can't run the method
QQmlEnginePrivate *ep = QQmlEnginePrivate::get(ctxt->engine);
ep->referenceScarceResources(); // "hold" scarce resources in memory during evaluation.
QV4::Scope scope(ep->v4engine());
QV4::Scoped<QV4::FunctionObject> function(scope, method(id));
if (!function) {
// The function was not compiled. There are some exceptional cases which the
// expression rewriter does not rewrite properly (e.g., \r-terminated lines
// are not rewritten correctly but this bug is deemed out-of-scope to fix for
// performance reasons; see QTBUG-24064) and thus compilation will have failed.
QQmlError e;
e.setDescription(QString(QLatin1String("Exception occurred during compilation of function: %1")).
arg(QLatin1String(QMetaObject::method(_id).methodSignature().constData())));
ep->warning(e);
return -1; // The dynamic method with that id is not available.
}
QQmlVMEMetaData::MethodData *data = metaData->methodData() + id;
QV4::ScopedCallData callData(scope, data->parameterCount);
callData->thisObject = ep->v8engine()->global();
for (int ii = 0; ii < data->parameterCount; ++ii)
callData->args[ii] = ep->v8engine()->fromVariant(*(QVariant *)a[ii + 1]);
QV4::ScopedValue result(scope);
QV4::ExecutionContext *ctx = function->engine()->currentContext();
result = function->call(callData);
if (scope.hasException()) {
QQmlError error = QV4::ExecutionEngine::catchExceptionAsQmlError(ctx);
if (error.isValid())
ep->warning(error);
if (a[0]) *(QVariant *)a[0] = QVariant();
} else {
if (a[0]) *(QVariant *)a[0] = ep->v8engine()->toVariant(result, 0);
}
ep->dereferenceScarceResources(); // "release" scarce resources if top-level expression evaluation is complete.
return -1;
}
return -1;
}
}
if (parent.isT1())
return parent.asT1()->metaCall(object, c, _id, a);
else
return object->qt_metacall(c, _id, a);
}