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();
}
v8::Local<v8::Value>
QQmlJavaScriptExpression::evaluate(QQmlContextData *context,
v8::Handle<v8::Function> function,
int argc, v8::Handle<v8::Value> args[],
bool *isUndefined)
{
Q_ASSERT(context && context->engine);
if (function.IsEmpty() || function->IsUndefined()) {
if (isUndefined) *isUndefined = true;
return v8::Local<v8::Value>();
}
QQmlEnginePrivate *ep = QQmlEnginePrivate::get(context->engine);
Q_ASSERT(notifyOnValueChanged() || activeGuards.isEmpty());
GuardCapture capture(context->engine, this);
QQmlEnginePrivate::PropertyCapture *lastPropertyCapture = ep->propertyCapture;
ep->propertyCapture = notifyOnValueChanged()?&capture:0;
if (notifyOnValueChanged())
capture.guards.copyAndClearPrepend(activeGuards);
QQmlContextData *lastSharedContext = 0;
QObject *lastSharedScope = 0;
bool sharedContext = useSharedContext();
// All code that follows must check with watcher before it accesses data members
// incase we have been deleted.
DeleteWatcher watcher(this);
if (sharedContext) {
lastSharedContext = ep->sharedContext;
lastSharedScope = ep->sharedScope;
ep->sharedContext = context;
ep->sharedScope = scopeObject();
}
v8::Local<v8::Value> result;
{
v8::TryCatch try_catch;
v8::Handle<v8::Object> This = ep->v8engine()->global();
if (scopeObject() && requiresThisObject()) {
v8::Handle<v8::Value> value = ep->v8engine()->newQObject(scopeObject());
if (value->IsObject()) This = v8::Handle<v8::Object>::Cast(value);
}
result = function->Call(This, argc, args);
if (isUndefined)
*isUndefined = try_catch.HasCaught() || result->IsUndefined();
if (watcher.wasDeleted()) {
} else if (try_catch.HasCaught()) {
v8::Context::Scope scope(ep->v8engine()->context());
v8::Local<v8::Message> message = try_catch.Message();
if (!message.IsEmpty()) {
delayedError()->setMessage(message);
} else {
if (hasDelayedError()) delayedError()->clearError();
}
} else {
if (hasDelayedError()) delayedError()->clearError();
}
}
if (sharedContext) {
ep->sharedContext = lastSharedContext;
ep->sharedScope = lastSharedScope;
}
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;
}
