v8::Handle<v8::Value> QV8ContextWrapper::Getter(v8::Local<v8::String> property,
const v8::AccessorInfo &info)
{
QV8ContextResource *resource = v8_resource_check<QV8ContextResource>(info.This());
// Its possible we could delay the calculation of the "actual" context (in the case
// of sub contexts) until it is definately needed.
QQmlContextData *context = resource->getContext();
QQmlContextData *expressionContext = context;
if (!context)
return v8::Undefined();
if (v8::Context::GetCallingQmlGlobal() != info.This())
return v8::Handle<v8::Value>();
// Search type (attached property/enum/imported scripts) names
// while (context) {
// Search context properties
// Search scope object
// Search context object
// context = context->parent
// }
QV8Engine *engine = resource->engine;
QObject *scopeObject = resource->getScopeObject();
QHashedV8String propertystring(property);
if (context->imports && QV8Engine::startsWithUpper(property)) {
// Search for attached properties, enums and imported scripts
QQmlTypeNameCache::Result r = context->imports->query(propertystring);
if (r.isValid()) {
if (r.scriptIndex != -1) {
int index = r.scriptIndex;
if (index < context->importedScripts.count())
return context->importedScripts.at(index);
else
return v8::Undefined();
} else if (r.type) {
return engine->typeWrapper()->newObject(scopeObject, r.type);
} else if (r.importNamespace) {
return engine->typeWrapper()->newObject(scopeObject, context->imports, r.importNamespace);
}
Q_ASSERT(!"Unreachable");
}
// Fall through
}
QQmlEnginePrivate *ep = QQmlEnginePrivate::get(engine->engine());
QV8QObjectWrapper *qobjectWrapper = engine->qobjectWrapper();
while (context) {
// Search context properties
if (context->propertyNames) {
int propertyIdx = context->propertyNames->value(propertystring);
if (propertyIdx != -1) {
if (propertyIdx < context->idValueCount) {
ep->captureProperty(&context->idValues[propertyIdx].bindings);
return engine->newQObject(context->idValues[propertyIdx]);
} else {
QQmlContextPrivate *cp = context->asQQmlContextPrivate();
ep->captureProperty(context->asQQmlContext(), -1,
propertyIdx + cp->notifyIndex);
const QVariant &value = cp->propertyValues.at(propertyIdx);
if (value.userType() == qMetaTypeId<QList<QObject*> >()) {
QQmlListProperty<QObject> prop(context->asQQmlContext(), (void*) qintptr(propertyIdx),
QQmlContextPrivate::context_count,
QQmlContextPrivate::context_at);
return engine->listWrapper()->newList(prop, qMetaTypeId<QQmlListProperty<QObject> >());
} else {
return engine->fromVariant(cp->propertyValues.at(propertyIdx));
}
}
}
}
// Search scope object
if (scopeObject) {
v8::Handle<v8::Value> result = qobjectWrapper->getProperty(scopeObject, propertystring,
context, QV8QObjectWrapper::CheckRevision);
if (!result.IsEmpty()) return result;
}
scopeObject = 0;
// Search context object
if (context->contextObject) {
v8::Handle<v8::Value> result = qobjectWrapper->getProperty(context->contextObject, propertystring,
context, QV8QObjectWrapper::CheckRevision);
if (!result.IsEmpty()) return result;
}
context = context->parent;
}
expressionContext->unresolvedNames = true;
// V8 will throw a ReferenceError if appropriate ("typeof" should not throw)
return v8::Handle<v8::Value>();
}
ReturnedValue QmlContextWrapper::get(const Managed *m, String *name, bool *hasProperty)
{
Q_ASSERT(m->as<QmlContextWrapper>());
const QmlContextWrapper *resource = static_cast<const QmlContextWrapper *>(m);
QV4::ExecutionEngine *v4 = resource->engine();
QV4::Scope scope(v4);
// In V8 the JS global object would come _before_ the QML global object,
// so simulate that here.
bool hasProp;
QV4::ScopedValue result(scope, v4->globalObject->get(name, &hasProp));
if (hasProp) {
if (hasProperty)
*hasProperty = hasProp;
return result->asReturnedValue();
}
if (resource->d()->isNullWrapper)
return Object::get(m, name, hasProperty);
if (v4->callingQmlContext() != resource->d()->context)
return Object::get(m, name, hasProperty);
result = Object::get(m, name, &hasProp);
if (hasProp) {
if (hasProperty)
*hasProperty = hasProp;
return result->asReturnedValue();
}
// Its possible we could delay the calculation of the "actual" context (in the case
// of sub contexts) until it is definately needed.
QQmlContextData *context = resource->getContext();
QQmlContextData *expressionContext = context;
if (!context) {
if (hasProperty)
*hasProperty = true;
return result->asReturnedValue();
}
// Search type (attached property/enum/imported scripts) names
// while (context) {
// Search context properties
// Search scope object
// Search context object
// context = context->parent
// }
QObject *scopeObject = resource->getScopeObject();
if (context->imports && name->startsWithUpper()) {
// Search for attached properties, enums and imported scripts
QQmlTypeNameCache::Result r = context->imports->query(name);
if (r.isValid()) {
if (hasProperty)
*hasProperty = true;
if (r.scriptIndex != -1) {
QV4::ScopedObject scripts(scope, context->importedScripts.valueRef());
return scripts->getIndexed(r.scriptIndex);
} else if (r.type) {
return QmlTypeWrapper::create(v4, scopeObject, r.type);
} else if (r.importNamespace) {
return QmlTypeWrapper::create(v4, scopeObject, context->imports, r.importNamespace);
}
Q_ASSERT(!"Unreachable");
}
// Fall through
}
QQmlEnginePrivate *ep = QQmlEnginePrivate::get(v4->qmlEngine());
while (context) {
// Search context properties
const QV4::IdentifierHash<int> &properties = context->propertyNames();
if (properties.count()) {
int propertyIdx = properties.value(name);
if (propertyIdx != -1) {
if (propertyIdx < context->idValueCount) {
if (ep->propertyCapture)
ep->propertyCapture->captureProperty(&context->idValues[propertyIdx].bindings);
if (hasProperty)
*hasProperty = true;
return QV4::QObjectWrapper::wrap(v4, context->idValues[propertyIdx]);
} else {
QQmlContextPrivate *cp = context->asQQmlContextPrivate();
if (ep->propertyCapture)
ep->propertyCapture->captureProperty(context->asQQmlContext(), -1, propertyIdx + cp->notifyIndex);
const QVariant &value = cp->propertyValues.at(propertyIdx);
if (hasProperty)
*hasProperty = true;
if (value.userType() == qMetaTypeId<QList<QObject*> >()) {
QQmlListProperty<QObject> prop(context->asQQmlContext(), (void*) qintptr(propertyIdx),
QQmlContextPrivate::context_count,
QQmlContextPrivate::context_at);
return QmlListWrapper::create(v4, prop, qMetaTypeId<QQmlListProperty<QObject> >());
} else {
return scope.engine->fromVariant(cp->propertyValues.at(propertyIdx));
}
}
}
}
// Search scope object
if (scopeObject) {
bool hasProp = false;
QV4::ScopedValue result(scope, QV4::QObjectWrapper::getQmlProperty(v4, context, scopeObject,
name, QV4::QObjectWrapper::CheckRevision, &hasProp));
if (hasProp) {
if (hasProperty)
*hasProperty = true;
return result->asReturnedValue();
}
}
scopeObject = 0;
// Search context object
if (context->contextObject) {
bool hasProp = false;
result = QV4::QObjectWrapper::getQmlProperty(v4, context, context->contextObject, name, QV4::QObjectWrapper::CheckRevision, &hasProp);
if (hasProp) {
if (hasProperty)
*hasProperty = true;
return result->asReturnedValue();
}
}
context = context->parent;
}
expressionContext->unresolvedNames = true;
return Encode::undefined();
}
