customtyperegistry.cpp

/*
  This file is part of the Cutelee template system.
 
  Copyright (c) 2010 Michael Jansen <kde@michael-jansen.biz>
  Copyright (c) 2010 Stephen Kelly <steveire@gmail.com>
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either version
  2.1 of the Licence, or (at your option) any later version.
 
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
*/
 
#include "customtyperegistry_p.h"
 
#include "metaenumvariable_p.h"
#include "safestring.h"
 
#include <QtCore/QLoggingCategory>
#include <QtCore/QQueue>
#include <QtCore/QStack>
#include <QtCore/QStringList>
 
Q_LOGGING_CATEGORY(CUTELEE_CUSTOMTYPE, "cutelee.customtype")
 
using namespace Cutelee;
 
CustomTypeRegistry::CustomTypeRegistry()
{
  // Cutelee Types
  registerBuiltInMetatype<SafeString>();
  registerBuiltInMetatype<MetaEnumVariable>();
}
 
void CustomTypeRegistry::registerLookupOperator(int id,
                                                MetaType::LookupFunction f)
{
  CustomTypeInfo &info = types[id];
  info.lookupFunction = f;
}
 
QVariant CustomTypeRegistry::lookup(const QVariant &object,
                                    const QString &property) const
{
    if (!object.isValid())
        return QVariant();
 
    const auto id = object.userType();
    MetaType::LookupFunction lf;
    {
        auto it = types.constFind(id);
        if (it == types.constEnd()) {
            qCWarning(CUTELEE_CUSTOMTYPE)
                    << "Don't know how to handle metatype" << QMetaType(id).name();
            // :TODO: Print out error message
            return QVariant();
        }
 
        const CustomTypeInfo &info = it.value();
        if (!info.lookupFunction) {
            qCWarning(CUTELEE_CUSTOMTYPE)
                    << "No lookup function for metatype" << QMetaType(id).name();
            lf = 0;
            // :TODO: Print out error message
            return QVariant();
        }
 
        lf = info.lookupFunction;
    }
 
    return lf(object, property);
}
 
bool CustomTypeRegistry::lookupAlreadyRegistered(int id) const
{
    auto it = types.constFind(id);
    if (it != types.constEnd()) {
        return it.value().lookupFunction != 0;
    }
    return false;
}