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/*
Copyright 2014 S. Razi Alavizadeh
Copyright 2013-2014 Adam Reichold
This file is part of qpdfview.
qpdfview 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.
qpdfview 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 qpdfview. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DOCUMENTLAYOUT_H
#define DOCUMENTLAYOUT_H
#include <QMap>
#include <QPair>
#include "global.h"
class QRectF;
namespace qpdfview
{
class Settings;
class PageItem;
struct DocumentLayout
{
DocumentLayout();
virtual ~DocumentLayout() {}
static DocumentLayout* fromLayoutMode(LayoutMode layoutMode);
virtual LayoutMode layoutMode() const = 0;
virtual int currentPage(int page) const = 0;
virtual int previousPage(int page) const = 0;
virtual int nextPage(int page, int count) const = 0;
bool isCurrentPage(const QRectF& visibleRect, const QRectF& pageRect) const;
virtual QPair< int, int > prefetchRange(int page, int count) const = 0;
virtual int leftIndex(int index) const = 0;
virtual int rightIndex(int index, int count) const = 0;
virtual qreal visibleWidth(int viewportWidth) const = 0;
qreal visibleHeight(int viewportHeight) const;
virtual void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
qreal& left, qreal& right, qreal& height) = 0;
protected:
static Settings* s_settings;
};
struct SinglePageLayout : public DocumentLayout
{
LayoutMode layoutMode() const { return SinglePageMode; }
int currentPage(int page) const;
int previousPage(int page) const;
int nextPage(int page, int count) const;
QPair< int, int > prefetchRange(int page, int count) const;
int leftIndex(int index) const;
int rightIndex(int index, int count) const;
qreal visibleWidth(int viewportWidth) const;
void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
qreal& left, qreal& right, qreal& height);
};
struct TwoPagesLayout : public DocumentLayout
{
LayoutMode layoutMode() const { return TwoPagesMode; }
int currentPage(int page) const;
int previousPage(int page) const;
int nextPage(int page, int count) const;
QPair< int, int > prefetchRange(int page, int count) const;
int leftIndex(int index) const;
int rightIndex(int index, int count) const;
qreal visibleWidth(int viewportWidth) const;
void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
qreal& left, qreal& right, qreal& height);
};
struct TwoPagesWithCoverPageLayout : public TwoPagesLayout
{
LayoutMode layoutMode() const { return TwoPagesWithCoverPageMode; }
int currentPage(int page) const;
int leftIndex(int index) const;
int rightIndex(int index, int count) const;
};
struct MultiplePagesLayout : public DocumentLayout
{
LayoutMode layoutMode() const { return MultiplePagesMode; }
int currentPage(int page) const;
int previousPage(int page) const;
int nextPage(int page, int count) const;
QPair< int, int > prefetchRange(int page, int count) const;
int leftIndex(int index) const;
int rightIndex(int index, int count) const;
qreal visibleWidth(int viewportWidth) const;
void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
qreal& left, qreal& right, qreal& height);
};
} // qpdfview
#endif // DOCUMENTLAYOUT_H
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