qqmltypewrapper_p.h

Go to the documentation of this file.

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QV8TYPEWRAPPER_P_H
#define QV8TYPEWRAPPER_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <QtCore/qglobal.h>
#include <QtCore/qpointer.h>
 
#include <private/qv4value_p.h>
#include <private/qv4functionobject_p.h>
#include <private/qv4qmetaobjectwrapper_p.h>
 
QT_BEGIN_NAMESPACE
 
class QQmlTypeNameCache;
class QQmlType;
class QQmlTypePrivate;
struct QQmlImportRef;
 
namespace QV4 {
 
namespace Heap {
 
struct QQmlTypeWrapper : FunctionObject {
 
    enum TypeNameMode : quint8  {
        ExcludeEnums     = 0x0,
        IncludeEnums     = 0x1,
        TypeNameModeMask = 0x1,
    };
 
    enum Kind : quint8 {
        Type      = 0x0,
        Namespace = 0x2,
        KindMask  = 0x2
    };
 
    void init(TypeNameMode m, QObject *o, const QQmlTypePrivate *type);
    void init(TypeNameMode m, QObject *o, QQmlTypeNameCache *type, const QQmlImportRef *import);
 
    void destroy();
 
    const QMetaObject *metaObject() const { return type().metaObject(); }
    QMetaType metaType() const { return type().typeId(); }
 
    QQmlType type() const;
    TypeNameMode typeNameMode() const { return TypeNameMode(flags & TypeNameModeMask); }
    Kind kind() const { return Kind(flags & KindMask); }
 
    const QQmlPropertyData *ensureConstructorsCache(
            const QMetaObject *metaObject, QMetaType metaType)
    {
        Q_ASSERT(kind() == Type);
        if (!t.constructors && metaObject) {
            t.constructors = QMetaObjectWrapper::createConstructors(metaObject, metaType);
            warnIfUncreatable();
        }
        return t.constructors;
    }
    void warnIfUncreatable() const;
 
    QQmlTypeNameCache::Result queryNamespace(
            const QV4::String *name, QQmlEnginePrivate *enginePrivate) const;
 
    QV4QPointer<QObject> object;
 
    union {
        struct {
            const QQmlTypePrivate *typePrivate;
            const QQmlPropertyData *constructors;
        } t;
        struct {
            QQmlTypeNameCache *typeNamespace;
            const QQmlImportRef *importNamespace;
        } n;
    };
 
    quint8 flags;
};
 
using QQmlTypeConstructor = QQmlTypeWrapper;
 
struct QQmlScopedEnumWrapper : Object {
    void init() { Object::init(); }
    void destroy();
    int scopeEnumIndex;
    const QQmlTypePrivate *typePrivate;
    QQmlType type() const;
};
 
}
 
struct Q_QML_EXPORT QQmlTypeWrapper : FunctionObject
{
    V4_OBJECT2(QQmlTypeWrapper, FunctionObject)
    V4_PROTOTYPE(typeWrapperPrototype)
    V4_NEEDS_DESTROY
 
    bool isSingleton() const;
    const QMetaObject *metaObject() const;
    QObject *object() const;
    QObject *singletonObject() const;
 
    QVariant toVariant() const;
 
    static void initProto(ExecutionEngine *v4);
 
    static ReturnedValue create(ExecutionEngine *, QObject *, const QQmlType &,
                                Heap::QQmlTypeWrapper::TypeNameMode = Heap::QQmlTypeWrapper::IncludeEnums);
    static ReturnedValue create(ExecutionEngine *, QObject *, const QQmlRefPointer<QQmlTypeNameCache> &, const QQmlImportRef *,
                                Heap::QQmlTypeWrapper::TypeNameMode = Heap::QQmlTypeWrapper::IncludeEnums);
 
    static ReturnedValue virtualResolveLookupGetter(const Object *object, ExecutionEngine *engine, Lookup *lookup);
    static bool virtualResolveLookupSetter(Object *object, ExecutionEngine *engine, Lookup *lookup, const Value &value);
    static OwnPropertyKeyIterator *virtualOwnPropertyKeys(const Object *m, Value *target);
    static int virtualMetacall(Object *object, QMetaObject::Call call, int index, void **a);
 
    static ReturnedValue lookupSingletonProperty(Lookup *l, ExecutionEngine *engine, const Value &base);
    static ReturnedValue lookupSingletonMethod(Lookup *l, ExecutionEngine *engine, const Value &base);
    static ReturnedValue lookupEnumValue(Lookup *l, ExecutionEngine *engine, const Value &base);
    static ReturnedValue lookupScopedEnum(Lookup *l, ExecutionEngine *engine, const Value &base);
 
protected:
    static ReturnedValue virtualGet(const Managed *m, PropertyKey id, const Value *receiver, bool *hasProperty);
    static bool virtualPut(Managed *m, PropertyKey id, const Value &value, Value *receiver);
    static PropertyAttributes virtualGetOwnProperty(const Managed *m, PropertyKey id, Property *p);
    static bool virtualIsEqualTo(Managed *that, Managed *o);
    static ReturnedValue virtualInstanceOf(const Object *typeObject, const Value &var);
 
private:
    static ReturnedValue method_hasInstance(
            const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
    static ReturnedValue method_toString(
            const FunctionObject *b, const Value *thisObject, const Value *, int);
};
 
struct QQmlTypeConstructor : QQmlTypeWrapper
{
    V4_OBJECT2(QQmlTypeConstructor, QQmlTypeWrapper)
 
    static ReturnedValue virtualCallAsConstructor(
            const FunctionObject *f, const Value *argv, int argc, const Value *)
    {
        Q_ASSERT(f->as<QQmlTypeWrapper>());
        return QMetaObjectWrapper::construct(
                static_cast<const QQmlTypeWrapper *>(f)->d(), argv, argc);
    }
};
 
struct Q_QML_EXPORT QQmlScopedEnumWrapper : Object
{
    V4_OBJECT2(QQmlScopedEnumWrapper, Object)
    V4_NEEDS_DESTROY
 
    static ReturnedValue virtualGet(const Managed *m, PropertyKey id, const Value *receiver, bool *hasProperty);
};
 
}
 
QT_END_NAMESPACE
 
#endif // QV8TYPEWRAPPER_P_H