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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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

**

** This file is part of the Qt Designer of the Qt Toolkit.

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** No Commercial Usage

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

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** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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

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

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

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

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

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

**

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

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

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

**

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

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

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** $QT_END_LICENSE$

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

#include "metadatabase_p.h"

#include "widgetdatabase_p.h"

// sdk

#include <QtDesigner/QDesignerFormEditorInterface>

// Qt

#include <QtGui/QWidget>

#include <QtCore/qalgorithms.h>

#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

namespace {

    const bool debugMetaDatabase = false;

}

namespace qdesigner_internal {

MetaDataBaseItem::MetaDataBaseItem(QObject *object)

    : m_object(object),

      m_enabled(true)

{

}

MetaDataBaseItem::~MetaDataBaseItem()

{

}

QString MetaDataBaseItem::name() const

{

    Q_ASSERT(m_object);

    return m_object->objectName();

}

void MetaDataBaseItem::setName(const QString &name)

{

    Q_ASSERT(m_object);

    m_object->setObjectName(name);

}

QString MetaDataBaseItem::customClassName() const

{

    return m_customClassName;

}

void MetaDataBaseItem::setCustomClassName(const QString &customClassName)

{

    m_customClassName = customClassName;

}

MetaDataBaseItem::TabOrder  MetaDataBaseItem::tabOrder() const

{

    return m_tabOrder;

}

void MetaDataBaseItem::setTabOrder(const TabOrder &tabOrder)

{

    m_tabOrder = tabOrder;

}

bool MetaDataBaseItem::enabled() const

{

    return m_enabled;

}

void MetaDataBaseItem::setEnabled(bool b)

{

    m_enabled = b;

}

QString MetaDataBaseItem::script() const

{

    return m_script;

}

void MetaDataBaseItem::setScript(const QString &script)

{

    m_script = script;

}

QStringList MetaDataBaseItem::fakeSlots() const

{

    return m_fakeSlots;

}

void MetaDataBaseItem::setFakeSlots(const QStringList &fs)

{

    m_fakeSlots = fs;

}

QStringList MetaDataBaseItem::fakeSignals() const

{

     return m_fakeSignals;

}

void MetaDataBaseItem::setFakeSignals(const QStringList &fs)

{

    m_fakeSignals = fs;

}

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

MetaDataBase::MetaDataBase(QDesignerFormEditorInterface *core, QObject *parent)

    : QDesignerMetaDataBaseInterface(parent),

      m_core(core)

{

}

MetaDataBase::~MetaDataBase()

{

    qDeleteAll(m_items);

}

MetaDataBaseItem *MetaDataBase::metaDataBaseItem(QObject *object) const

{

    MetaDataBaseItem *i = m_items.value(object);

    if (i == 0 || !i->enabled())

        return 0;

    return i;

}

void MetaDataBase::add(QObject *object)

{

    MetaDataBaseItem *item = m_items.value(object);

    if (item != 0) {

        item->setEnabled(true);

        if (debugMetaDatabase) {

            qDebug() << "MetaDataBase::add: Existing item for " << object->metaObject()->className() << item->name();

        }

        return;

    }

    item = new MetaDataBaseItem(object);

    m_items.insert(object, item);

    if (debugMetaDatabase) {

        qDebug() << "MetaDataBase::add: New item " << object->metaObject()->className() << item->name();

    }

    connect(object, SIGNAL(destroyed(QObject*)),

        this, SLOT(slotDestroyed(QObject*)));

    emit changed();

}

void MetaDataBase::remove(QObject *object)

{

    Q_ASSERT(object);

    if (MetaDataBaseItem *item = m_items.value(object)) {

        item->setEnabled(false);

        emit changed();

    }

}

QList<QObject*> MetaDataBase::objects() const

{

    QList<QObject*> result;

    ItemMap::const_iterator it = m_items.begin();

    for (; it != m_items.end(); ++it) {

        if (it.value()->enabled())

            result.append(it.key());

    }

    return result;

}

QDesignerFormEditorInterface *MetaDataBase::core() const

{

    return m_core;

}

void MetaDataBase::slotDestroyed(QObject *object)

{

    if (m_items.contains(object)) {

        MetaDataBaseItem *item = m_items.value(object);

        delete item;

        m_items.remove(object);

    }

}

// promotion convenience

QDESIGNER_SHARED_EXPORT bool promoteWidget(QDesignerFormEditorInterface *core,QWidget *widget,const QString &customClassName)

{

    MetaDataBase *db = qobject_cast<MetaDataBase *>(core->metaDataBase());

    if (!db)

        return false;

    MetaDataBaseItem *item = db->metaDataBaseItem(widget);

    if (!item) {

        db ->add(widget);

        item = db->metaDataBaseItem(widget);

    }

    // Recursive promotion occurs if there is a plugin missing.

    const QString oldCustomClassName = item->customClassName();

    if (!oldCustomClassName.isEmpty()) {

        qDebug() << "WARNING: Recursive promotion of " << oldCustomClassName << " to " << customClassName

            << ". A plugin is missing.";

    }

    item->setCustomClassName(customClassName);  

    if (debugMetaDatabase) {

        qDebug() << "Promoting " << widget->metaObject()->className() << " to " << customClassName;

    }

    return true;

}

QDESIGNER_SHARED_EXPORT void demoteWidget(QDesignerFormEditorInterface *core,QWidget *widget)

{

    MetaDataBase *db = qobject_cast<MetaDataBase *>(core->metaDataBase());

    if (!db)

        return;

    MetaDataBaseItem *item = db->metaDataBaseItem(widget);

    item->setCustomClassName(QString());

    if (debugMetaDatabase) {

        qDebug() << "Demoting " << widget;

    }

}

QDESIGNER_SHARED_EXPORT bool isPromoted(QDesignerFormEditorInterface *core, QWidget* widget)

{

    const MetaDataBase *db = qobject_cast<const MetaDataBase *>(core->metaDataBase());

    if (!db)

        return false;

    const MetaDataBaseItem *item = db->metaDataBaseItem(widget);

    if (!item)

        return false;

    return !item->customClassName().isEmpty();

}

QDESIGNER_SHARED_EXPORT QString promotedCustomClassName(QDesignerFormEditorInterface *core, QWidget* widget)

{

    const MetaDataBase *db = qobject_cast<const MetaDataBase *>(core->metaDataBase());

    if (!db)

        return QString();

    const MetaDataBaseItem *item = db->metaDataBaseItem(widget);

    if (!item)

        return QString();

    return item->customClassName();

}

QDESIGNER_SHARED_EXPORT QString promotedExtends(QDesignerFormEditorInterface *core, QWidget* widget)

{

    const QString customClassName = promotedCustomClassName(core,widget);

    if (customClassName.isEmpty())

        return QString();

    const int i = core->widgetDataBase()->indexOfClassName(customClassName);

    if (i == -1)

        return QString();

    return core->widgetDataBase()->item(i)->extends();

}

} // namespace qdesigner_internal

QT_END_NAMESPACE