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diff --git a/src/pdfwidgets/qpdfview_p.h b/src/pdfwidgets/qpdfview_p.h
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+++ b/src/pdfwidgets/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();
+    void currentPageChanged(int currentPage);
+    void calculateViewport();
+    void setViewport(QRect viewport);
+    void updateScrollBars();
+
+    void pageRendered(int pageNumber, QSize imageSize, const QImage &image, quint64 requestId);
+    void invalidateDocumentLayout();
+    void invalidatePageCache();
+
+    qreal yPositionForPage(int page) const;
+
+    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