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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtQml module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #include "qv4variantobject_p.h" |
| #include "qv4functionobject_p.h" |
| #include "qv4objectproto_p.h" |
| #include <private/qqmlvaluetypewrapper_p.h> |
| #include <private/qv4qobjectwrapper_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace QV4; |
| |
| DEFINE_OBJECT_VTABLE(VariantObject); |
| |
| void Heap::VariantObject::init() |
| { |
| Object::init(); |
| scarceData = new ExecutionEngine::ScarceResourceData; |
| } |
| |
| void Heap::VariantObject::init(const QVariant &value) |
| { |
| Object::init(); |
| scarceData = new ExecutionEngine::ScarceResourceData(value); |
| if (isScarce()) |
| removeVmePropertyReference(); |
| } |
| |
| bool VariantObject::Data::isScarce() const |
| { |
| int t = data().userType(); |
| return t == QMetaType::QPixmap || t == QMetaType::QImage; |
| } |
| |
| bool VariantObject::virtualIsEqualTo(Managed *m, Managed *other) |
| { |
| Q_ASSERT(m->as<QV4::VariantObject>()); |
| QV4::VariantObject *lv = static_cast<QV4::VariantObject *>(m); |
| |
| if (QV4::VariantObject *rv = other->as<QV4::VariantObject>()) |
| return lv->d()->data() == rv->d()->data(); |
| |
| if (QV4::QQmlValueTypeWrapper *v = other->as<QQmlValueTypeWrapper>()) |
| return v->isEqual(lv->d()->data()); |
| |
| return false; |
| } |
| |
| void VariantObject::addVmePropertyReference() const |
| { |
| if (d()->isScarce() && ++d()->vmePropertyReferenceCount == 1) { |
| // remove from the ep->scarceResources list |
| // since it is now no longer eligible to be |
| // released automatically by the engine. |
| d()->addVmePropertyReference(); |
| } |
| } |
| |
| void VariantObject::removeVmePropertyReference() const |
| { |
| if (d()->isScarce() && --d()->vmePropertyReferenceCount == 0) { |
| // and add to the ep->scarceResources list |
| // since it is now eligible to be released |
| // automatically by the engine. |
| d()->removeVmePropertyReference(); |
| } |
| } |
| |
| |
| void VariantPrototype::init() |
| { |
| defineDefaultProperty(QStringLiteral("preserve"), method_preserve, 0); |
| defineDefaultProperty(QStringLiteral("destroy"), method_destroy, 0); |
| defineDefaultProperty(engine()->id_valueOf(), method_valueOf, 0); |
| defineDefaultProperty(engine()->id_toString(), method_toString, 0); |
| } |
| |
| ReturnedValue VariantPrototype::method_preserve(const FunctionObject *, const Value *thisObject, const Value *, int) |
| { |
| const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
| if (o && o->d()->isScarce()) |
| o->d()->addVmePropertyReference(); |
| RETURN_UNDEFINED(); |
| } |
| |
| ReturnedValue VariantPrototype::method_destroy(const FunctionObject *, const Value *thisObject, const Value *, int) |
| { |
| const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
| if (o) { |
| if (o->d()->isScarce()) |
| o->d()->addVmePropertyReference(); |
| o->d()->data() = QVariant(); |
| } |
| RETURN_UNDEFINED(); |
| } |
| |
| ReturnedValue VariantPrototype::method_toString(const FunctionObject *b, const Value *thisObject, const Value *, int) |
| { |
| ExecutionEngine *v4 = b->engine(); |
| const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
| if (!o) |
| RETURN_UNDEFINED(); |
| const QVariant variant = o->d()->data(); |
| QString result = variant.toString(); |
| if (result.isEmpty() && !variant.canConvert(QMetaType::QString)) { |
| QDebug dbg(&result); |
| dbg << variant; |
| // QDebug appends a space, we're not interested in continuing the stream so we chop it off. |
| // Can't use nospace() because it would affect the debug-stream operator of the variant. |
| result.chop(1); |
| } |
| return Encode(v4->newString(result)); |
| } |
| |
| ReturnedValue VariantPrototype::method_valueOf(const FunctionObject *b, const Value *thisObject, const Value *, int) |
| { |
| const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
| if (o) { |
| QVariant v = o->d()->data(); |
| switch (v.userType()) { |
| case QMetaType::UnknownType: |
| return Encode::undefined(); |
| case QMetaType::QString: |
| return Encode(b->engine()->newString(v.toString())); |
| case QMetaType::Int: |
| return Encode(v.toInt()); |
| case QMetaType::Double: |
| case QMetaType::UInt: |
| return Encode(v.toDouble()); |
| case QMetaType::Bool: |
| return Encode(v.toBool()); |
| default: |
| if (QMetaType::typeFlags(v.userType()) & QMetaType::IsEnumeration) |
| RETURN_RESULT(Encode(v.toInt())); |
| break; |
| } |
| } |
| return thisObject->asReturnedValue(); |
| } |
| |
| QT_END_NAMESPACE |