diff options
Diffstat (limited to 'src/qml/qml/qqmlprivate.h')
| -rw-r--r-- | src/qml/qml/qqmlprivate.h | 410 |
1 files changed, 369 insertions, 41 deletions
diff --git a/src/qml/qml/qqmlprivate.h b/src/qml/qml/qqmlprivate.h index 6d7a2569bc..d6a9e73763 100644 --- a/src/qml/qml/qqmlprivate.h +++ b/src/qml/qml/qqmlprivate.h @@ -52,18 +52,43 @@ // #include <functional> +#include <type_traits> #include <QtQml/qtqmlglobal.h> +#include <QtQml/qqmlparserstatus.h> +#include <QtQml/qqmllist.h> +#include <QtQml/qqmlpropertyvaluesource.h> #include <QtCore/qglobal.h> #include <QtCore/qvariant.h> #include <QtCore/qurl.h> #include <QtCore/qpointer.h> +#include <QtCore/qmetaobject.h> +#include <QtCore/qdebug.h> + +#define QML_GETTYPENAMES \ + const char *className = T::staticMetaObject.className(); \ + const int nameLen = int(strlen(className)); \ + QVarLengthArray<char,48> pointerName(nameLen+2); \ + memcpy(pointerName.data(), className, size_t(nameLen)); \ + pointerName[nameLen] = '*'; \ + pointerName[nameLen+1] = '\0'; \ + const int listLen = int(strlen("QQmlListProperty<")); \ + QVarLengthArray<char,64> listName(listLen + nameLen + 2); \ + memcpy(listName.data(), "QQmlListProperty<", size_t(listLen)); \ + memcpy(listName.data()+listLen, className, size_t(nameLen)); \ + listName[listLen+nameLen] = '>'; \ + listName[listLen+nameLen+1] = '\0'; + QT_BEGIN_NAMESPACE +class QQmlPropertyValueInterceptor; + namespace QQmlPrivate { struct CachedQmlUnit; +template<typename A> +using QQmlAttachedPropertiesFunc = A *(*)(QObject *); } namespace QV4 { @@ -78,7 +103,7 @@ struct Document; typedef void (*IRLoaderFunction)(Document *, const QQmlPrivate::CachedQmlUnit *); } -typedef QObject *(*QQmlAttachedPropertiesFunc)(QObject *); +using QQmlAttachedPropertiesFunc = QQmlPrivate::QQmlAttachedPropertiesFunc<QObject>; inline uint qHash(QQmlAttachedPropertiesFunc func, uint seed = 0) { @@ -99,6 +124,14 @@ class QJSValue; class QJSEngine; class QQmlEngine; class QQmlCustomParser; +class QQmlTypeNotAvailable; + +template<class T> +QQmlCustomParser *qmlCreateCustomParser() +{ + return nullptr; +} + namespace QQmlPrivate { void Q_QML_EXPORT qdeclarativeelement_destructor(QObject *); @@ -124,11 +157,62 @@ namespace QQmlPrivate }; template<typename T> + constexpr bool isConstructible() + { + return std::is_default_constructible<T>::value && std::is_base_of<QObject, T>::value; + } + + template<typename T> void createInto(void *memory) { new (memory) QQmlElement<T>; } template<typename T> + QObject *createSingletonInstance(QQmlEngine *, QJSEngine *) { return new T; } + + template<typename T> QObject *createParent(QObject *p) { return new T(p); } + using CreateIntoFunction = void (*)(void *); + using CreateSingletonFunction = QObject *(*)(QQmlEngine *, QJSEngine *); + using CreateParentFunction = QObject *(*)(QObject *); + + template<typename T, bool Constructible = isConstructible<T>()> + struct Constructors; + + template<typename T> + struct Constructors<T, true> + { + static constexpr CreateIntoFunction createInto + = QQmlPrivate::createInto<T>; + static constexpr CreateSingletonFunction createSingletonInstance + = QQmlPrivate::createSingletonInstance<T>; + }; + + template<typename T> + struct Constructors<T, false> + { + static constexpr CreateIntoFunction createInto = nullptr; + static constexpr CreateSingletonFunction createSingletonInstance = nullptr; + }; + + template<typename T, bool IsVoid = std::is_void<T>::value> + struct ExtendedType; + + // void means "not an extended type" + template<typename T> + struct ExtendedType<T, true> + { + static constexpr const CreateParentFunction createParent = nullptr; + static constexpr const QMetaObject *staticMetaObject = nullptr; + }; + + // If it's not void, we actually want an error if the ctor or the metaobject is missing. + template<typename T> + struct ExtendedType<T, false> + { + static constexpr const CreateParentFunction createParent = QQmlPrivate::createParent<T>; + static constexpr const QMetaObject *staticMetaObject = &T::staticMetaObject; + }; + template<class From, class To, int N> struct StaticCastSelectorClass { @@ -156,66 +240,103 @@ namespace QQmlPrivate } }; - template <typename T> - struct has_attachedPropertiesMember + template<typename...> + using QmlVoidT = void; + + // You can prevent subclasses from using the same attached type by specialzing this. + // This is reserved for internal types, though. + template<class T, class A> + struct OverridableAttachedType { - static bool const value = QQmlTypeInfo<T>::hasAttachedProperties; + using Type = A; }; - template <typename T, bool hasMember> - class has_attachedPropertiesMethod + template<class T, class = QmlVoidT<>, bool OldStyle = QQmlTypeInfo<T>::hasAttachedProperties> + struct QmlAttached { - public: - typedef int yes_type; - typedef char no_type; - - template<typename ReturnType> - static yes_type checkType(ReturnType *(*)(QObject *)); - static no_type checkType(...); - - static bool const value = sizeof(checkType(&T::qmlAttachedProperties)) == sizeof(yes_type); + using Type = void; + using Func = QQmlAttachedPropertiesFunc<QObject>; + static const QMetaObject *staticMetaObject() { return nullptr; } + static Func attachedPropertiesFunc() { return nullptr; } }; - template <typename T> - class has_attachedPropertiesMethod<T, false> + // Defined inline via QML_ATTACHED + template<class T> + struct QmlAttached<T, QmlVoidT<typename OverridableAttachedType<T, typename T::QmlAttachedType>::Type>, false> { - public: - static bool const value = false; + // Normal attached properties + template <typename Parent, typename Attached> + struct Properties + { + using Func = QQmlAttachedPropertiesFunc<Attached>; + static const QMetaObject *staticMetaObject() { return &Attached::staticMetaObject; } + static Func attachedPropertiesFunc() { return Parent::qmlAttachedProperties; } + }; + + // Disabled via OverridableAttachedType + template<typename Parent> + struct Properties<Parent, void> + { + using Func = QQmlAttachedPropertiesFunc<QObject>; + static const QMetaObject *staticMetaObject() { return nullptr; }; + static Func attachedPropertiesFunc() { return nullptr; }; + }; + + using Type = typename OverridableAttachedType<T, typename T::QmlAttachedType>::Type; + using Func = typename Properties<T, Type>::Func; + + static const QMetaObject *staticMetaObject() + { + return Properties<T, Type>::staticMetaObject(); + } + + static Func attachedPropertiesFunc() + { + return Properties<T, Type>::attachedPropertiesFunc(); + } }; - template<typename T, int N> - class AttachedPropertySelector + // Separately defined via QQmlTypeInfo + template<class T> + struct QmlAttached<T, QmlVoidT<decltype(T::qmlAttachedProperties)>, true> { - public: - static inline QQmlAttachedPropertiesFunc func() { return nullptr; } - static inline const QMetaObject *metaObject() { return nullptr; } + using Type = typename std::remove_pointer<decltype(T::qmlAttachedProperties(nullptr))>::type; + using Func = QQmlAttachedPropertiesFunc<Type>; + + static const QMetaObject *staticMetaObject() { return &Type::staticMetaObject; } + static Func attachedPropertiesFunc() { return T::qmlAttachedProperties; } }; - template<typename T> - class AttachedPropertySelector<T, 1> + + // This is necessary because both the type containing a default template parameter and the type + // instantiating the template need to have access to the default template parameter type. In + // this case that's T::QmlAttachedType. The QML_FOREIGN macro needs to befriend specific other + // types. Therefore we need some kind of "accessor". Because of compiler bugs in gcc and clang, + // we cannot befriend attachedPropertiesFunc() directly. Wrapping the actual access into another + // struct "fixes" that. For convenience we still want the free standing functions in addition. + template<class T> + struct QmlAttachedAccessor { - template<typename ReturnType> - static inline const QMetaObject *attachedPropertiesMetaObject(ReturnType *(*)(QObject *)) { - return &ReturnType::staticMetaObject; - } - public: - static inline QQmlAttachedPropertiesFunc func() { - return QQmlAttachedPropertiesFunc(&T::qmlAttachedProperties); + static QQmlAttachedPropertiesFunc<QObject> attachedPropertiesFunc() + { + return QQmlAttachedPropertiesFunc<QObject>(QmlAttached<T>::attachedPropertiesFunc()); } - static inline const QMetaObject *metaObject() { - return attachedPropertiesMetaObject(&T::qmlAttachedProperties); + + static const QMetaObject *staticMetaObject() + { + return QmlAttached<T>::staticMetaObject(); } }; template<typename T> - inline QQmlAttachedPropertiesFunc attachedPropertiesFunc() + inline QQmlAttachedPropertiesFunc<QObject> attachedPropertiesFunc() { - return AttachedPropertySelector<T, has_attachedPropertiesMethod<T, has_attachedPropertiesMember<T>::value>::value>::func(); + return QmlAttachedAccessor<T>::attachedPropertiesFunc(); } template<typename T> inline const QMetaObject *attachedPropertiesMetaObject() { - return AttachedPropertySelector<T, has_attachedPropertiesMethod<T, has_attachedPropertiesMember<T>::value>::value>::metaObject(); + return QmlAttachedAccessor<T>::staticMetaObject(); } enum AutoParentResult { Parented, IncompatibleObject, IncompatibleParent }; @@ -236,7 +357,7 @@ namespace QQmlPrivate const char *elementName; const QMetaObject *metaObject; - QQmlAttachedPropertiesFunc attachedPropertiesFunction; + QQmlAttachedPropertiesFunc<QObject> attachedPropertiesFunction; const QMetaObject *attachedPropertiesMetaObject; int parserStatusCast; @@ -247,10 +368,38 @@ namespace QQmlPrivate const QMetaObject *extensionMetaObject; QQmlCustomParser *customParser; + int revision; // If this is extended ensure "version" is bumped!!! }; + struct RegisterTypeAndRevisions { + int version; + + int typeId; + int listId; + int objectSize; + void (*create)(void *); + + const char *uri; + int versionMajor; + + const QMetaObject *metaObject; + const QMetaObject *classInfoMetaObject; + + QQmlAttachedPropertiesFunc<QObject> attachedPropertiesFunction; + const QMetaObject *attachedPropertiesMetaObject; + + int parserStatusCast; + int valueSourceCast; + int valueInterceptorCast; + + QObject *(*extensionObjectCreate)(QObject *); + const QMetaObject *extensionMetaObject; + + QQmlCustomParser *(*customParserFactory)(); + }; + struct RegisterInterface { int version; @@ -258,6 +407,9 @@ namespace QQmlPrivate int listId; const char *iid; + + const char *uri; + int versionMajor; }; struct RegisterAutoParent { @@ -283,6 +435,19 @@ namespace QQmlPrivate // If this is extended ensure "version" is bumped!!! }; + struct RegisterSingletonTypeAndRevisions { + int version; + const char *uri; + int versionMajor; + + QJSValue (*scriptApi)(QQmlEngine *, QJSEngine *); + const QMetaObject *instanceMetaObject; + const QMetaObject *classInfoMetaObject; + + int typeId; + std::function<QObject*(QQmlEngine *, QJSEngine *)> generalizedQobjectApi; // new in version 3 + }; + struct RegisterCompositeType { QUrl url; const char *uri; @@ -318,7 +483,9 @@ namespace QQmlPrivate SingletonRegistration = 3, CompositeRegistration = 4, CompositeSingletonRegistration = 5, - QmlUnitCacheHookRegistration = 6 + QmlUnitCacheHookRegistration = 6, + TypeAndRevisionsRegistration = 7, + SingletonAndRevisionsRegistration = 8 }; int Q_QML_EXPORT qmlregister(RegistrationType, void *); @@ -330,7 +497,168 @@ namespace QQmlPrivate QPointer<QObject> m_object; bool alreadyCalled = false; }; -} + + static int indexOfOwnClassInfo(const QMetaObject *metaObject, const char *key) + { + if (!metaObject || !key) + return -1; + + const int offset = metaObject->classInfoOffset(); + for (int i = metaObject->classInfoCount() + offset - 1; i >= offset; --i) + if (qstrcmp(key, metaObject->classInfo(i).name()) == 0) { + return i; + } + return -1; + } + + inline const char *classInfo(const QMetaObject *metaObject, const char *key) + { + return metaObject->classInfo(indexOfOwnClassInfo(metaObject, key)).value(); + } + + inline int intClassInfo(const QMetaObject *metaObject, const char *key, int defaultValue = 0) + { + const int index = indexOfOwnClassInfo(metaObject, key); + return (index == -1) ? defaultValue + : QByteArray(metaObject->classInfo(index).value()).toInt(); + } + + inline bool boolClassInfo(const QMetaObject *metaObject, const char *key, + bool defaultValue = false) + { + const int index = indexOfOwnClassInfo(metaObject, key); + return (index == -1) ? defaultValue + : (QByteArray(metaObject->classInfo(index).value()) == "true"); + } + + inline const char *classElementName(const QMetaObject *metaObject) + { + const char *elementName = classInfo(metaObject, "QML.Element"); + if (qstrcmp(elementName, "auto") == 0) + return metaObject->className(); + if (qstrcmp(elementName, "anonymous") == 0) + return nullptr; + + if (!elementName || elementName[0] < 'A' || elementName[0] > 'Z') { + qWarning() << "Missing or unusable QML.Element class info \"" << elementName << "\"" + << "for" << metaObject->className(); + } + + return elementName; + } + + template<class T, class = QmlVoidT<>> + struct QmlExtended + { + using Type = void; + }; + + template<class T> + struct QmlExtended<T, QmlVoidT<typename T::QmlExtendedType>> + { + using Type = typename T::QmlExtendedType; + }; + + template<class T, class = QmlVoidT<>> + struct QmlResolved + { + using Type = T; + }; + + template<class T> + struct QmlResolved<T, QmlVoidT<typename T::QmlForeignType>> + { + using Type = typename T::QmlForeignType; + }; + + template<class T, class = QmlVoidT<>> + struct QmlSingleton + { + static constexpr bool Value = false; + }; + + template<class T> + struct QmlSingleton<T, QmlVoidT<typename T::QmlIsSingleton>> + { + static constexpr bool Value = bool(T::QmlIsSingleton::yes); + }; + + template<class T, class = QmlVoidT<>> + struct QmlInterface + { + static constexpr bool Value = false; + }; + + template<class T> + struct QmlInterface<T, QmlVoidT<typename T::QmlIsInterface>> + { + static constexpr bool Value = bool(T::QmlIsInterface::yes); + }; + + template<typename T> + void qmlRegisterSingletonAndRevisions(const char *uri, int versionMajor, + const QMetaObject *classInfoMetaObject) + { + QML_GETTYPENAMES + + RegisterSingletonTypeAndRevisions api = { + 0, + + uri, + versionMajor, + + nullptr, + + &T::staticMetaObject, + classInfoMetaObject, + + qRegisterNormalizedMetaType<T *>(pointerName.constData()), + Constructors<T>::createSingletonInstance + }; + + qmlregister(SingletonAndRevisionsRegistration, &api); + } + + template<typename T, typename E> + void qmlRegisterTypeAndRevisions(const char *uri, int versionMajor, + const QMetaObject *classInfoMetaObject) + { + QML_GETTYPENAMES + + RegisterTypeAndRevisions type = { + 0, + qRegisterNormalizedMetaType<T *>(pointerName.constData()), + qRegisterNormalizedMetaType<QQmlListProperty<T> >(listName.constData()), + int(sizeof(T)), + Constructors<T>::createInto, + + uri, + versionMajor, + + &T::staticMetaObject, + classInfoMetaObject, + + attachedPropertiesFunc<T>(), + attachedPropertiesMetaObject<T>(), + + StaticCastSelector<T, QQmlParserStatus>::cast(), + StaticCastSelector<T, QQmlPropertyValueSource>::cast(), + StaticCastSelector<T, QQmlPropertyValueInterceptor>::cast(), + + ExtendedType<E>::createParent, + ExtendedType<E>::staticMetaObject, + + &qmlCreateCustomParser<T> + }; + + qmlregister(TypeAndRevisionsRegistration, &type); + } + + template<> + void Q_QML_EXPORT qmlRegisterTypeAndRevisions<QQmlTypeNotAvailable, void>( + const char *uri, int versionMajor, const QMetaObject *classInfoMetaObject); + +} // namespace QQmlPrivate QT_END_NAMESPACE |