// vim: set tabstop=4 shiftwidth=4 noexpandtab:
/*
Gwenview: an image viewer
Copyright 2007 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, Boston, MA 02110-1301, USA.

*/
// Self
#include "cropimageoperation.h"

// Qt
#include <QImage>
#include <QPainter>

// KDE
#include <kdebug.h>
#include <klocale.h>

// Local
#include "document/document.h"
#include "document/documentjob.h"
#include "document/abstractdocumenteditor.h"

namespace Gwenview {

class CropJob : public ThreadedDocumentJob {
public:
	CropJob(const QRect& rect)
	: mRect(rect)
	{}

	virtual void threadedStart() {
		if (!checkDocumentEditor()) {
			return;
		}
		QImage src = document()->image();
		QImage dst(mRect.size(), src.format());
		QPainter painter(&dst);
		painter.setCompositionMode(QPainter::CompositionMode_Source);
		painter.drawImage(QPoint(0, 0), src, mRect);
		painter.end();
		document()->editor()->setImage(dst);
		setError(NoError);
	}

private:
	QRect mRect;
};


struct CropImageOperationPrivate {
	QRect mRect;
	QImage mOriginalImage;
};


CropImageOperation::CropImageOperation(const QRect& rect)
: d(new CropImageOperationPrivate) {
	d->mRect = rect;
	setText(i18n("Crop"));
}


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


void CropImageOperation::redo() {
	d->mOriginalImage = document()->image();
	redoAsDocumentJob(new CropJob(d->mRect));
}


void CropImageOperation::undo() {
	if (!document()->editor()) {
		kWarning() << "!document->editor()";
		return;
	}
	document()->editor()->setImage(d->mOriginalImage);
}


} // namespace
