cachingloaderdecorator.cpp

/*
  This file is part of the Cutelee template system.
 
  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 "cachingloaderdecorator.h"
 
namespace Cutelee
{
 
class CachingLoaderDecoratorPrivate
{
public:
  CachingLoaderDecoratorPrivate(std::shared_ptr<AbstractTemplateLoader> loader,
                                CachingLoaderDecorator *qq)
      : q_ptr(qq), m_wrappedLoader(loader)
  {
  }
 
  Q_DECLARE_PUBLIC(CachingLoaderDecorator)
  CachingLoaderDecorator *const q_ptr;
 
  const std::shared_ptr<AbstractTemplateLoader> m_wrappedLoader;
 
  mutable QHash<QString, Template> m_cache;
};
}
 
using namespace Cutelee;
 
CachingLoaderDecorator::CachingLoaderDecorator(std::shared_ptr<AbstractTemplateLoader> loader)
    : d_ptr(new CachingLoaderDecoratorPrivate(loader, this))
{
}
 
CachingLoaderDecorator::~CachingLoaderDecorator() { delete d_ptr; }
 
bool CachingLoaderDecorator::canLoadTemplate(const QString &name) const
{
  Q_D(const CachingLoaderDecorator);
  return d->m_wrappedLoader->canLoadTemplate(name);
}
 
void CachingLoaderDecorator::clear()
{
  Q_D(CachingLoaderDecorator);
  return d->m_cache.clear();
}
 
int CachingLoaderDecorator::size() const
{
  Q_D(const CachingLoaderDecorator);
  return d->m_cache.size();
}
 
bool CachingLoaderDecorator::isEmpty() const
{
  Q_D(const CachingLoaderDecorator);
  return d->m_cache.isEmpty();
}
 
std::pair<QString, QString>
CachingLoaderDecorator::getMediaUri(const QString &fileName) const
{
  Q_D(const CachingLoaderDecorator);
  return d->m_wrappedLoader->getMediaUri(fileName);
}
 
Template
CachingLoaderDecorator::loadByName(const QString &name,
                                   const Cutelee::Engine *engine) const
{
    Q_D(const CachingLoaderDecorator);
    const auto it = d->m_cache.constFind(name);
    if (it != d->m_cache.constEnd()) {
        return it.value();
    }
 
    const auto t = d->m_wrappedLoader->loadByName(name, engine);
 
    d->m_cache.insert(name, t);
 
    return t;
}