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/*
Scan Tailor - Interactive post-processing tool for scanned pages.
Copyright (C) 2007-2008 Joseph Artsimovich <joseph_a@mail.ru>
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/>.
*/
#ifndef PAGEID_H_
#define PAGEID_H_
#include "ImageId.h"
class QString;
/**
* \brief A logical page on an image.
*
* An image can contain one or two logical pages.
*/
class PageId
{
// Member-wise copying is OK.
public:
enum SubPage { SINGLE_PAGE, LEFT_PAGE, RIGHT_PAGE };
PageId();
/**
* \note The default parameter for subpage is not arbitrary. It has to
* preceed other values in terms of operator<(). That's necessary
* to be able to use lower_bound() to find the first page with
* a matching image id.
*/
explicit PageId(ImageId const& image_id, SubPage subpage = SINGLE_PAGE);
bool isNull() const { return m_imageId.isNull(); }
ImageId& imageId() { return m_imageId; }
ImageId const& imageId() const { return m_imageId; }
SubPage subPage() const { return m_subPage; }
QString subPageAsString() const { return subPageToString(m_subPage); }
static QString subPageToString(SubPage sub_page);
static SubPage subPageFromString(QString const& string, bool* ok = 0);
private:
ImageId m_imageId;
SubPage m_subPage;
};
bool operator==(PageId const& lhs, PageId const& rhs);
bool operator!=(PageId const& lhs, PageId const& rhs);
bool operator<(PageId const& lhs, PageId const& rhs);
#endif
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