1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtDeclarative module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #ifndef QDECLARATIVEPRIVATE_H

    43 #define QDECLARATIVEPRIVATE_H

    44 

    45 #include <QtCore/qglobal.h>

    46 #include <QtCore/qvariant.h>

    47 #ifndef Q_OS_WIN

    48 #include <stdint.h>

    49 #endif

    50 

    51 QT_BEGIN_HEADER

    52 

    53 QT_BEGIN_NAMESPACE

    54 

    55 QT_MODULE(Declarative)

    56 

    57 typedef QObject *(*QDeclarativeAttachedPropertiesFunc)(QObject *);

    58 

    59 template <typename TYPE>

    60 class QDeclarativeTypeInfo

    61 {

    62 public:

    63     enum {

    64         hasAttachedProperties = 0

    65     };

    66 };

    67 

    68 

    69 class QDeclarativeCustomParser;

    70 namespace QDeclarativePrivate

    71 {

    72     void Q_DECLARATIVE_EXPORT qdeclarativeelement_destructor(QObject *);

    73     template<typename T>

    74     class QDeclarativeElement : public T

    75     {

    76     public:

    77         virtual ~QDeclarativeElement() { 

    78             QDeclarativePrivate::qdeclarativeelement_destructor(this); 

    79         }

    80     };

    81 

    82     template<typename T>

    83     void createInto(void *memory) { new (memory) QDeclarativeElement<T>; }

    84 

    85     template<typename T>

    86     QObject *createParent(QObject *p) { return new T(p); }

    87 

    88     template<class From, class To, int N>

    89     struct StaticCastSelectorClass

    90     {

    91         static inline int cast() { return -1; }

    92     };

    93 

    94     template<class From, class To>

    95     struct StaticCastSelectorClass<From, To, sizeof(int)>

    96     {

    97         static inline int cast() { return (int)((intptr_t)static_cast<To *>((From *)0x10000000)) - 0x10000000; }

    98     };

    99 

   100     template<class From, class To>

   101     struct StaticCastSelector

   102     {

   103         typedef int yes_type;

   104         typedef char no_type;

   105 

   106         static yes_type check(To *);

   107         static no_type check(...);

   108 

   109         static inline int cast()

   110         {

   111             return StaticCastSelectorClass<From, To, sizeof(check((From *)0))>::cast();

   112         }

   113     };

   114 

   115     template <typename T>

   116     struct has_attachedPropertiesMember

   117     {

   118         static bool const value = QDeclarativeTypeInfo<T>::hasAttachedProperties;

   119     };

   120 

   121     template <typename T, bool hasMember>

   122     class has_attachedPropertiesMethod 

   123     {

   124         typedef int yes_type;

   125         typedef char no_type;

   126 

   127         template<typename ReturnType>

   128         static yes_type check(ReturnType *(*)(QObject *));

   129         static no_type check(...);

   130 

   131     public:

   132         static bool const value = sizeof(check(&T::qmlAttachedProperties)) == sizeof(yes_type);

   133     }; 

   134 

   135     template <typename T>

   136     class has_attachedPropertiesMethod<T, false>

   137     {

   138     public:

   139         static bool const value = false;

   140     };

   141 

   142     template<typename T, int N>

   143     class AttachedPropertySelector

   144     {

   145     public:

   146         static inline QDeclarativeAttachedPropertiesFunc func() { return 0; }

   147         static inline const QMetaObject *metaObject() { return 0; }

   148     };

   149     template<typename T>

   150     class AttachedPropertySelector<T, 1>

   151     {

   152         static inline QObject *attachedProperties(QObject *obj) {

   153             return T::qmlAttachedProperties(obj);

   154         }

   155         template<typename ReturnType>

   156         static inline const QMetaObject *attachedPropertiesMetaObject(ReturnType *(*)(QObject *)) {

   157             return &ReturnType::staticMetaObject;

   158         }

   159     public:

   160         static inline QDeclarativeAttachedPropertiesFunc func() {

   161             return &attachedProperties;

   162         }

   163         static inline const QMetaObject *metaObject() {

   164             return attachedPropertiesMetaObject(&T::qmlAttachedProperties);

   165         }

   166     };

   167 

   168     template<typename T>

   169     inline QDeclarativeAttachedPropertiesFunc attachedPropertiesFunc()

   170     {

   171         return AttachedPropertySelector<T, has_attachedPropertiesMethod<T, has_attachedPropertiesMember<T>::value>::value>::func();

   172     }

   173 

   174     template<typename T>

   175     inline const QMetaObject *attachedPropertiesMetaObject()

   176     {

   177         return AttachedPropertySelector<T, has_attachedPropertiesMethod<T, has_attachedPropertiesMember<T>::value>::value>::metaObject();

   178     }

   179 

   180     struct RegisterType {

   181         int version;

   182 

   183         int typeId;

   184         int listId;

   185         int objectSize;

   186         void (*create)(void *);

   187         QString noCreationReason;

   188 

   189         const char *uri;

   190         int versionMajor;

   191         int versionMinor;

   192         const char *elementName;

   193         const QMetaObject *metaObject;

   194 

   195         QDeclarativeAttachedPropertiesFunc attachedPropertiesFunction;

   196         const QMetaObject *attachedPropertiesMetaObject;

   197 

   198         int parserStatusCast;

   199         int valueSourceCast;

   200         int valueInterceptorCast;

   201 

   202         QObject *(*extensionObjectCreate)(QObject *);

   203         const QMetaObject *extensionMetaObject;

   204 

   205         QDeclarativeCustomParser *customParser;

   206     };

   207 

   208     struct RegisterInterface {

   209         int version;

   210 

   211         int typeId;

   212         int listId;

   213 

   214         const char *iid;

   215     };

   216 

   217     int Q_DECLARATIVE_EXPORT registerType(const RegisterType &);

   218     int Q_DECLARATIVE_EXPORT registerType(const RegisterInterface &);

   219 

   220 }

   221 

   222 QT_END_NAMESPACE

   223 

   224 QT_END_HEADER

   225 

   226 #endif // QDECLARATIVEPRIVATE_H