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     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.

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     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

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

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    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 #include "private/qdeclarativeopenmetaobject_p.h"

    43 #include "private/qdeclarativepropertycache_p.h"

    44 #include "private/qdeclarativedata_p.h"

    45 #include <qmetaobjectbuilder_p.h>

    46 #include <qdebug.h>

    47 

    48 QT_BEGIN_NAMESPACE

    49 

    50 

    51 class QDeclarativeOpenMetaObjectTypePrivate

    52 {

    53 public:

    54     QDeclarativeOpenMetaObjectTypePrivate() : mem(0), cache(0), engine(0) {}

    55 

    56     void init(const QMetaObject *metaObj);

    57 

    58     int propertyOffset;

    59     int signalOffset;

    60     QHash<QByteArray, int> names;

    61     QMetaObjectBuilder mob;

    62     QMetaObject *mem;

    63     QDeclarativePropertyCache *cache;

    64     QDeclarativeEngine *engine;

    65     QSet<QDeclarativeOpenMetaObject*> referers;

    66 };

    67 

    68 QDeclarativeOpenMetaObjectType::QDeclarativeOpenMetaObjectType(const QMetaObject *base, QDeclarativeEngine *engine)

    69     : d(new QDeclarativeOpenMetaObjectTypePrivate)

    70 {

    71     d->engine = engine;

    72     d->init(base);

    73 }

    74 

    75 QDeclarativeOpenMetaObjectType::~QDeclarativeOpenMetaObjectType()

    76 {

    77     if (d->mem)

    78         qFree(d->mem);

    79     if (d->cache)

    80         d->cache->release();

    81     delete d;

    82 }

    83 

    84 

    85 int QDeclarativeOpenMetaObjectType::propertyOffset() const

    86 {

    87     return d->propertyOffset;

    88 }

    89 

    90 int QDeclarativeOpenMetaObjectType::signalOffset() const

    91 {

    92     return d->signalOffset;

    93 }

    94 

    95 int QDeclarativeOpenMetaObjectType::createProperty(const QByteArray &name)

    96 {

    97     int id = d->mob.propertyCount();

    98     d->mob.addSignal("__" + QByteArray::number(id) + "()");

    99     QMetaPropertyBuilder build = d->mob.addProperty(name, "QVariant", id);

   100     build.setDynamic(true);

   101     propertyCreated(id, build);

   102     qFree(d->mem);

   103     d->mem = d->mob.toMetaObject();

   104     d->names.insert(name, id);

   105     QSet<QDeclarativeOpenMetaObject*>::iterator it = d->referers.begin();

   106     while (it != d->referers.end()) {

   107         QDeclarativeOpenMetaObject *omo = *it;

   108         *static_cast<QMetaObject *>(omo) = *d->mem;

   109         if (d->cache)

   110             d->cache->update(d->engine, omo);

   111         ++it;

   112     }

   113 

   114     return d->propertyOffset + id;

   115 }

   116 

   117 void QDeclarativeOpenMetaObjectType::propertyCreated(int id, QMetaPropertyBuilder &builder)

   118 {

   119     if (d->referers.count())

   120         (*d->referers.begin())->propertyCreated(id, builder);

   121 }

   122 

   123 void QDeclarativeOpenMetaObjectTypePrivate::init(const QMetaObject *metaObj)

   124 {

   125     if (!mem) {

   126         mob.setSuperClass(metaObj);

   127         mob.setClassName(metaObj->className());

   128         mob.setFlags(QMetaObjectBuilder::DynamicMetaObject);

   129 

   130         mem = mob.toMetaObject();

   131 

   132         propertyOffset = mem->propertyOffset();

   133         signalOffset = mem->methodOffset();

   134     }

   135 }

   136 

   137 //----------------------------------------------------------------------------

   138 

   139 class QDeclarativeOpenMetaObjectPrivate

   140 {

   141 public:

   142     QDeclarativeOpenMetaObjectPrivate(QDeclarativeOpenMetaObject *_q)

   143         : q(_q), parent(0), type(0), cacheProperties(false) {}

   144 

   145     inline QVariant &getData(int idx) {

   146         while (data.count() <= idx)

   147             data << QPair<QVariant, bool>(QVariant(), false);

   148         QPair<QVariant, bool> &prop = data[idx];

   149         if (!prop.second) {

   150             prop.first = q->initialValue(idx);

   151             prop.second = true;

   152         }

   153         return prop.first;

   154     }

   155 

   156     inline void writeData(int idx, const QVariant &value) {

   157         while (data.count() <= idx)

   158             data << QPair<QVariant, bool>(QVariant(), false);

   159         QPair<QVariant, bool> &prop = data[idx];

   160         prop.first = value;

   161         prop.second = true;

   162     }

   163 

   164     bool autoCreate;

   165     QDeclarativeOpenMetaObject *q;

   166     QAbstractDynamicMetaObject *parent;

   167     QList<QPair<QVariant, bool> > data;

   168     QObject *object;

   169     QDeclarativeOpenMetaObjectType *type;

   170     bool cacheProperties;

   171 };

   172 

   173 QDeclarativeOpenMetaObject::QDeclarativeOpenMetaObject(QObject *obj, bool automatic)

   174 : d(new QDeclarativeOpenMetaObjectPrivate(this))

   175 {

   176     d->autoCreate = automatic;

   177     d->object = obj;

   178 

   179     d->type = new QDeclarativeOpenMetaObjectType(obj->metaObject(), 0);

   180     d->type->d->referers.insert(this);

   181 

   182     QObjectPrivate *op = QObjectPrivate::get(obj);

   183     *static_cast<QMetaObject *>(this) = *d->type->d->mem;

   184     op->metaObject = this;

   185 }

   186 

   187 QDeclarativeOpenMetaObject::QDeclarativeOpenMetaObject(QObject *obj, QDeclarativeOpenMetaObjectType *type, bool automatic)

   188 : d(new QDeclarativeOpenMetaObjectPrivate(this))

   189 {

   190     d->autoCreate = automatic;

   191     d->object = obj;

   192 

   193     d->type = type;

   194     d->type->addref();

   195     d->type->d->referers.insert(this);

   196 

   197     QObjectPrivate *op = QObjectPrivate::get(obj);

   198     *static_cast<QMetaObject *>(this) = *d->type->d->mem;

   199     op->metaObject = this;

   200 }

   201 

   202 QDeclarativeOpenMetaObject::~QDeclarativeOpenMetaObject()

   203 {

   204     if (d->parent)

   205         delete d->parent;

   206     d->type->d->referers.remove(this);

   207     d->type->release();

   208     delete d;

   209 }

   210 

   211 QDeclarativeOpenMetaObjectType *QDeclarativeOpenMetaObject::type() const

   212 {

   213     return d->type;

   214 }

   215 

   216 int QDeclarativeOpenMetaObject::metaCall(QMetaObject::Call c, int id, void **a)

   217 {

   218     if (( c == QMetaObject::ReadProperty || c == QMetaObject::WriteProperty)

   219             && id >= d->type->d->propertyOffset) {

   220         int propId = id - d->type->d->propertyOffset;

   221         if (c == QMetaObject::ReadProperty) {

   222             propertyRead(propId);

   223             *reinterpret_cast<QVariant *>(a[0]) = d->getData(propId);

   224         } else if (c == QMetaObject::WriteProperty) {

   225             if (propId <= d->data.count() || d->data[propId].first != *reinterpret_cast<QVariant *>(a[0]))  {

   226                 propertyWrite(propId);

   227                 d->writeData(propId, *reinterpret_cast<QVariant *>(a[0]));

   228                 propertyWritten(propId);

   229                 activate(d->object, d->type->d->signalOffset + propId, 0);

   230             }

   231         } 

   232         return -1;

   233     } else {

   234         if (d->parent)

   235             return d->parent->metaCall(c, id, a);

   236         else

   237             return d->object->qt_metacall(c, id, a);

   238     }

   239 }

   240 

   241 QAbstractDynamicMetaObject *QDeclarativeOpenMetaObject::parent() const

   242 {

   243     return d->parent;

   244 }

   245 

   246 QVariant QDeclarativeOpenMetaObject::value(int id) const

   247 {

   248     return d->getData(id);

   249 }

   250 

   251 void QDeclarativeOpenMetaObject::setValue(int id, const QVariant &value)

   252 {

   253     d->writeData(id, value);

   254     activate(d->object, id + d->type->d->signalOffset, 0);

   255 }

   256 

   257 QVariant QDeclarativeOpenMetaObject::value(const QByteArray &name) const

   258 {

   259     QHash<QByteArray, int>::ConstIterator iter = d->type->d->names.find(name);

   260     if (iter == d->type->d->names.end())

   261         return QVariant();

   262 

   263     return d->getData(*iter);

   264 }

   265 

   266 QVariant &QDeclarativeOpenMetaObject::operator[](const QByteArray &name)

   267 {

   268     QHash<QByteArray, int>::ConstIterator iter = d->type->d->names.find(name);

   269     Q_ASSERT(iter != d->type->d->names.end());

   270 

   271     return d->getData(*iter);

   272 }

   273 

   274 QVariant &QDeclarativeOpenMetaObject::operator[](int id)

   275 {

   276     return d->getData(id);

   277 }

   278 

   279 void QDeclarativeOpenMetaObject::setValue(const QByteArray &name, const QVariant &val)

   280 {

   281     QHash<QByteArray, int>::ConstIterator iter = d->type->d->names.find(name);

   282 

   283     int id = -1;

   284     if (iter == d->type->d->names.end()) {

   285         id = d->type->createProperty(name.constData()) - d->type->d->propertyOffset;

   286     } else {

   287         id = *iter;

   288     }

   289 

   290     QVariant &dataVal = d->getData(id);

   291     if (dataVal == val)

   292         return;

   293 

   294     dataVal = val;

   295     activate(d->object, id + d->type->d->signalOffset, 0);

   296 }

   297 

   298 void QDeclarativeOpenMetaObject::setCached(bool c)

   299 {

   300     if (c == d->cacheProperties || !d->type->d->engine)

   301         return;

   302 

   303     d->cacheProperties = c;

   304 

   305     QDeclarativeData *qmldata = QDeclarativeData::get(d->object, true);

   306     if (d->cacheProperties) {

   307         if (!d->type->d->cache)

   308             d->type->d->cache = new QDeclarativePropertyCache(d->type->d->engine, this);

   309         qmldata->propertyCache = d->type->d->cache;

   310         d->type->d->cache->addref();

   311     } else {

   312         if (d->type->d->cache)

   313             d->type->d->cache->release();

   314         qmldata->propertyCache = 0;

   315     }

   316 }

   317 

   318 

   319 int QDeclarativeOpenMetaObject::createProperty(const char *name, const char *)

   320 {

   321     if (d->autoCreate)

   322         return d->type->createProperty(name);

   323     else

   324         return -1;

   325 }

   326 

   327 void QDeclarativeOpenMetaObject::propertyRead(int)

   328 {

   329 }

   330 

   331 void QDeclarativeOpenMetaObject::propertyWrite(int)

   332 {

   333 }

   334 

   335 void QDeclarativeOpenMetaObject::propertyWritten(int)

   336 {

   337 }

   338 

   339 void QDeclarativeOpenMetaObject::propertyCreated(int, QMetaPropertyBuilder &)

   340 {

   341 }

   342 

   343 QVariant QDeclarativeOpenMetaObject::initialValue(int)

   344 {

   345     return QVariant();

   346 }

   347 

   348 int QDeclarativeOpenMetaObject::count() const

   349 {

   350     return d->type->d->names.count();

   351 }

   352 

   353 QByteArray QDeclarativeOpenMetaObject::name(int idx) const

   354 {

   355     Q_ASSERT(idx >= 0 && idx < d->type->d->names.count());

   356 

   357     return d->type->d->mob.property(idx).name();

   358 }

   359 

   360 QObject *QDeclarativeOpenMetaObject::object() const

   361 {

   362     return d->object;

   363 }

   364 

   365 QT_END_NAMESPACE