qpdfview_p.h

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// Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Tobias König <tobias.koenig@kdab.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QPDFVIEW_P_H
#define QPDFVIEW_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include "qpdfview.h"
#include "qpdfdocument.h"
#include "qpdflinkmodel.h"
 
#include <QHash>
#include <QPointer>
 
QT_BEGIN_NAMESPACE
 
class QPdfPageRenderer;
 
class QPdfViewPrivate
{
    Q_DECLARE_PUBLIC(QPdfView)
 
public:
    QPdfViewPrivate(QPdfView *q);
    void init();
 
    void documentStatusChanged(QPdfDocument::Status status);
    void currentPageChanged(int currentPage);
    void currentZoomChanged(qreal currentZoom);
    void calculateViewport();
    void setViewport(QRect viewport);
    void updateScrollBars();
    void scrollTo(const QPdfLink &link);
 
    void pageRendered(int pageNumber, QSize imageSize, const QImage &image, quint64 requestId);
    void invalidateDocumentLayout();
    void invalidatePageCache();
 
    qreal yPositionForPage(int page) const;
    QPdfLink pagePosition(const QPointF &viewPosition);
 
    QTransform screenScaleTransform(int page) const; // points to pixels
 
    struct DocumentLayout
    {
        QSize documentSize;
        QHash<int, QPair<QRect, qreal>> pageGeometryAndScale;
    };
 
    DocumentLayout calculateDocumentLayout() const;
    void updateDocumentLayout();
 
    QPdfView *q_ptr;
    QPointer<QPdfDocument> m_document;
    QPointer<QPdfSearchModel> m_searchModel;
    QPdfPageNavigator* m_pageNavigator;
    QPdfPageRenderer *m_pageRenderer;
    QPdfLinkModel m_linkModel;
 
    QPdfView::PageMode m_pageMode;
    QPdfView::ZoomMode m_zoomMode;
    qreal m_zoomFactor;
 
    int m_currentSearchResultIndex = -1;
 
    int m_pageSpacing;
    QMargins m_documentMargins;
 
    bool m_blockPageScrolling;
 
    QMetaObject::Connection m_documentStatusChangedConnection;
 
    QRect m_viewport;
 
    QHash<int, QImage> m_pageCache;
    QList<int> m_cachedPagesLRU;
    int m_pageCacheLimit;
 
    DocumentLayout m_documentLayout;
 
    qreal m_screenResolution; // pixels per point
};
 
Q_DECLARE_TYPEINFO(QPdfViewPrivate::DocumentLayout, Q_RELOCATABLE_TYPE);
 
QT_END_NAMESPACE
 
#endif // QPDFVIEW_P_H