// vim: set tabstop=4 shiftwidth=4 expandtab:
/*
Gwenview: an image viewer
Copyright 2010 Aurélien Gâteau <agateau@kde.org>

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 2
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.

*/
// Self
#include "documentinfoprovider.moc"

// Qt
#include <QPixmap>

// KDE

// Local
#include <lib/document/documentfactory.h>
#include <lib/semanticinfo/sorteddirmodel.h>

namespace Gwenview
{

struct DocumentInfoProviderPrivate
{
    SortedDirModel* mDirModel;
};

DocumentInfoProvider::DocumentInfoProvider(SortedDirModel* model)
: AbstractDocumentInfoProvider(model)
, d(new DocumentInfoProviderPrivate)
{
    d->mDirModel = model;
    connect(DocumentFactory::instance(), SIGNAL(documentBusyStateChanged(KUrl, bool)),
            SLOT(emitBusyStateChanged(KUrl, bool)));

    connect(DocumentFactory::instance(), SIGNAL(documentChanged(KUrl)),
            SLOT(emitDocumentChanged(KUrl)));
}

DocumentInfoProvider::~DocumentInfoProvider()
{
    delete d;
}

void DocumentInfoProvider::thumbnailForDocument(const KUrl& url, ThumbnailGroup::Enum group, QPixmap* outPix, QSize* outFullSize) const
{
    Q_ASSERT(outPix);
    Q_ASSERT(outFullSize);
    *outPix = QPixmap();
    *outFullSize = QSize();
    DocumentFactory* factory = DocumentFactory::instance();
    const int pixelSize = ThumbnailGroup::pixelSize(group);

    if (!factory->hasUrl(url)) {
        return;
    }

    Document::Ptr doc = factory->load(url);
    if (doc->loadingState() != Document::Loaded) {
        return;
    }

    QImage image = doc->image();
    if (image.width() > pixelSize || image.height() > pixelSize) {
        image = image.scaled(pixelSize, pixelSize, Qt::KeepAspectRatio);
    }
    *outPix = QPixmap::fromImage(image);
    *outFullSize = doc->size();
}

bool DocumentInfoProvider::isModified(const KUrl& url)
{
    DocumentFactory* factory = DocumentFactory::instance();

    if (factory->hasUrl(url)) {
        Document::Ptr doc = factory->load(url);
        return doc->loadingState() == Document::Loaded && doc->isModified();
    } else {
        return false;
    }
}

bool DocumentInfoProvider::isBusy(const KUrl& url)
{
    DocumentFactory* factory = DocumentFactory::instance();

    if (factory->hasUrl(url)) {
        Document::Ptr doc = factory->load(url);
        return doc->isBusy();
    } else {
        return false;
    }
}

void DocumentInfoProvider::emitBusyStateChanged(const KUrl& url, bool busy)
{
    QModelIndex index = d->mDirModel->indexForUrl(url);
    if (!index.isValid()) {
        return;
    }
    busyStateChanged(index, busy);
}

void DocumentInfoProvider::emitDocumentChanged(const KUrl& url)
{
    QModelIndex index = d->mDirModel->indexForUrl(url);
    if (!index.isValid()) {
        return;
    }
    documentChanged(index);
}

} // namespace
