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

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****************************************************************************/

#include "private/qdeclarativeopenmetaobject_p.h"

#include "private/qdeclarativepropertycache_p.h"

#include "private/qdeclarativedata_p.h"

#include <qmetaobjectbuilder_p.h>

#include <qdebug.h>

QT_BEGIN_NAMESPACE

class QDeclarativeOpenMetaObjectTypePrivate

{

public:

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

    void init(const QMetaObject *metaObj);

    int propertyOffset;

    int signalOffset;

    QHash<QByteArray, int> names;

    QMetaObjectBuilder mob;

    QMetaObject *mem;

    QDeclarativePropertyCache *cache;

    QDeclarativeEngine *engine;

    QSet<QDeclarativeOpenMetaObject*> referers;

};

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

    : d(new QDeclarativeOpenMetaObjectTypePrivate)

{

    d->engine = engine;

    d->init(base);

}

QDeclarativeOpenMetaObjectType::~QDeclarativeOpenMetaObjectType()

{

    if (d->mem)

        qFree(d->mem);

    if (d->cache)

        d->cache->release();

    delete d;

}

int QDeclarativeOpenMetaObjectType::propertyOffset() const

{

    return d->propertyOffset;

}

int QDeclarativeOpenMetaObjectType::signalOffset() const

{

    return d->signalOffset;

}

int QDeclarativeOpenMetaObjectType::createProperty(const QByteArray &name)

{

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

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

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

    build.setDynamic(true);

    propertyCreated(id, build);

    qFree(d->mem);

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

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

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

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

        QDeclarativeOpenMetaObject *omo = *it;

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

        if (d->cache)

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

        ++it;

    }

    return d->propertyOffset + id;

}

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

{

    if (d->referers.count())

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

}

void QDeclarativeOpenMetaObjectTypePrivate::init(const QMetaObject *metaObj)

{

    if (!mem) {

        mob.setSuperClass(metaObj);

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

        mob.setFlags(QMetaObjectBuilder::DynamicMetaObject);

        mem = mob.toMetaObject();

        propertyOffset = mem->propertyOffset();

        signalOffset = mem->methodOffset();

    }

}

//----------------------------------------------------------------------------

class QDeclarativeOpenMetaObjectPrivate

{

public:

    QDeclarativeOpenMetaObjectPrivate(QDeclarativeOpenMetaObject *_q)

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

    inline QVariant &getData(int idx) {

        while (data.count() <= idx)

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

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

        if (!prop.second) {

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

            prop.second = true;

        }

        return prop.first;

    }

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

        while (data.count() <= idx)

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

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

        prop.first = value;

        prop.second = true;

    }

    bool autoCreate;

    QDeclarativeOpenMetaObject *q;

    QAbstractDynamicMetaObject *parent;

    QList<QPair<QVariant, bool> > data;

    QObject *object;

    QDeclarativeOpenMetaObjectType *type;

    bool cacheProperties;

};

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

: d(new QDeclarativeOpenMetaObjectPrivate(this))

{

    d->autoCreate = automatic;

    d->object = obj;

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

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

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

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

    op->metaObject = this;

}

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

: d(new QDeclarativeOpenMetaObjectPrivate(this))

{

    d->autoCreate = automatic;

    d->object = obj;

    d->type = type;

    d->type->addref();

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

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

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

    op->metaObject = this;

}

QDeclarativeOpenMetaObject::~QDeclarativeOpenMetaObject()

{

    if (d->parent)

        delete d->parent;

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

    d->type->release();

    delete d;

}

QDeclarativeOpenMetaObjectType *QDeclarativeOpenMetaObject::type() const

{

    return d->type;

}

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

{

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

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

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

        if (c == QMetaObject::ReadProperty) {

            propertyRead(propId);

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

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

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

                propertyWrite(propId);

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

                propertyWritten(propId);

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

            }

        } 

        return -1;

    } else {

        if (d->parent)

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

        else

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

    }

}

QAbstractDynamicMetaObject *QDeclarativeOpenMetaObject::parent() const

{

    return d->parent;

}

QVariant QDeclarativeOpenMetaObject::value(int id) const

{

    return d->getData(id);

}

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

{

    d->writeData(id, value);

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

}

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

{

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

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

        return QVariant();

    return d->getData(*iter);

}

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

{

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

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

    return d->getData(*iter);

}

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

{

    return d->getData(id);

}

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

{

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

    int id = -1;

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

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

    } else {

        id = *iter;

    }

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

    if (dataVal == val)

        return;

    dataVal = val;

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

}

void QDeclarativeOpenMetaObject::setCached(bool c)

{

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

        return;

    d->cacheProperties = c;

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

    if (d->cacheProperties) {

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

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

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

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

    } else {

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

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

        qmldata->propertyCache = 0;

    }

}

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

{

    if (d->autoCreate)

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

    else

        return -1;

}

void QDeclarativeOpenMetaObject::propertyRead(int)

{

}

void QDeclarativeOpenMetaObject::propertyWrite(int)

{

}

void QDeclarativeOpenMetaObject::propertyWritten(int)

{

}

void QDeclarativeOpenMetaObject::propertyCreated(int, QMetaPropertyBuilder &)

{

}

QVariant QDeclarativeOpenMetaObject::initialValue(int)

{

    return QVariant();

}

int QDeclarativeOpenMetaObject::count() const

{

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

}

QByteArray QDeclarativeOpenMetaObject::name(int idx) const

{

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

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

}

QObject *QDeclarativeOpenMetaObject::object() const

{

    return d->object;

}

QT_END_NAMESPACE