144 строки
3.8 KiB
C++
144 строки
3.8 KiB
C++
/*
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Copyright 2014 S. Razi Alavizadeh
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Copyright 2013-2014 Adam Reichold
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This file is part of qpdfview.
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qpdfview is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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qpdfview is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with qpdfview. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DOCUMENTLAYOUT_H
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#define DOCUMENTLAYOUT_H
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#include <QMap>
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#include <QPair>
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#include "global.h"
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class QRectF;
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namespace qpdfview
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{
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class Settings;
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class PageItem;
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struct DocumentLayout
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{
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DocumentLayout();
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virtual ~DocumentLayout() {}
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static DocumentLayout* fromLayoutMode(LayoutMode layoutMode);
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virtual LayoutMode layoutMode() const = 0;
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virtual int currentPage(int page) const = 0;
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virtual int previousPage(int page) const = 0;
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virtual int nextPage(int page, int count) const = 0;
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bool isCurrentPage(const QRectF& visibleRect, const QRectF& pageRect) const;
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virtual QPair< int, int > prefetchRange(int page, int count) const = 0;
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virtual int leftIndex(int index) const = 0;
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virtual int rightIndex(int index, int count) const = 0;
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virtual qreal visibleWidth(int viewportWidth) const = 0;
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qreal visibleHeight(int viewportHeight) const;
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virtual void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
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qreal& left, qreal& right, qreal& height) = 0;
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protected:
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static Settings* s_settings;
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};
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struct SinglePageLayout : public DocumentLayout
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{
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LayoutMode layoutMode() const { return SinglePageMode; }
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int currentPage(int page) const;
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int previousPage(int page) const;
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int nextPage(int page, int count) const;
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QPair< int, int > prefetchRange(int page, int count) const;
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int leftIndex(int index) const;
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int rightIndex(int index, int count) const;
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qreal visibleWidth(int viewportWidth) const;
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void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
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qreal& left, qreal& right, qreal& height);
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};
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struct TwoPagesLayout : public DocumentLayout
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{
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LayoutMode layoutMode() const { return TwoPagesMode; }
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int currentPage(int page) const;
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int previousPage(int page) const;
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int nextPage(int page, int count) const;
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QPair< int, int > prefetchRange(int page, int count) const;
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int leftIndex(int index) const;
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int rightIndex(int index, int count) const;
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qreal visibleWidth(int viewportWidth) const;
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void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
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qreal& left, qreal& right, qreal& height);
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};
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struct TwoPagesWithCoverPageLayout : public TwoPagesLayout
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{
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LayoutMode layoutMode() const { return TwoPagesWithCoverPageMode; }
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int currentPage(int page) const;
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int leftIndex(int index) const;
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int rightIndex(int index, int count) const;
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};
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struct MultiplePagesLayout : public DocumentLayout
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{
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LayoutMode layoutMode() const { return MultiplePagesMode; }
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int currentPage(int page) const;
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int previousPage(int page) const;
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int nextPage(int page, int count) const;
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QPair< int, int > prefetchRange(int page, int count) const;
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int leftIndex(int index) const;
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int rightIndex(int index, int count) const;
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qreal visibleWidth(int viewportWidth) const;
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void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft,
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qreal& left, qreal& right, qreal& height);
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};
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} // qpdfview
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#endif // DOCUMENTLAYOUT_H
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