/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <QFile>

#include "PDFRenderer.h"

#include "XPDFRenderer.h"


#include "core/memcheck.h"

QMap< QUuid, QPointer<PDFRenderer> > PDFRenderer::sRenderers;


PDFRenderer::~PDFRenderer()
{
    // NOOP
}

PDFRenderer* PDFRenderer::rendererForUuid(const QUuid &uuid, const QString &filename)
{
    if (sRenderers.contains(uuid))
    {
        return sRenderers.value(uuid);
    }
    else
    {
        PDFRenderer *newRenderer = new XPDFRenderer(filename);

        newRenderer->setRefCount(0);
        newRenderer->setFileUuid(uuid);

        QFile file(filename);
        file.open(QIODevice::ReadOnly);
        newRenderer->setFileData(file.readAll());
        file.close();

        sRenderers.insert(newRenderer->fileUuid(), newRenderer);

        return newRenderer;
    }
}

void PDFRenderer::setRefCount(const QAtomicInt &refCount)
{
    mRefCount = refCount;
}

void PDFRenderer::setFileData(const QByteArray &fileData)
{
    mFileData = fileData;
}

void PDFRenderer::setFileUuid(const QUuid &fileUuid)
{
    mFileUuid = fileUuid;
}

void PDFRenderer::attach()
{
    mRefCount.ref();
}

void PDFRenderer::detach()
{
    mRefCount.deref();
    if (mRefCount == 0)
    {
        sRenderers.remove(mFileUuid);
        delete this;
    }
}
