Add QPdfDestination; NavigationStack stores page, location and zoom

Push/back/forward behavior seems more correct now, but still no
autotest yet.

QPdfDestination might be useful to represent locations of search results,
for link destinations and maybe named destinations too.

Fixes: QTBUG-77512
Change-Id: I113b2c535a2cd302106e6546104c64e12985d387
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 135 insertions, 0 deletions

diff --git a/src/pdf/qpdfdestination.cpp b/src/pdf/qpdfdestination.cpp
new file mode 100644
index 000000000..86e429dcf
--- /dev/null
+++ b/src/pdf/qpdfdestination.cpp
@@ -0,0 +1,135 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtPDF module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qpdfdestination.h"
+#include "qpdfdestination_p.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QPdfDestination
+    \since 5.15
+    \inmodule QtPdf
+
+    \brief The QPdfDestination class defines a location on a page in a PDF
+    document, and a suggested zoom level at which it is intended to be viewed.
+*/
+
+/*!
+    Constructs an invalid Destination.
+
+    \sa valid
+*/
+QPdfDestination::QPdfDestination()
+  : d(new QPdfDestinationPrivate())
+{
+}
+
+QPdfDestination::QPdfDestination(int page, QPointF location, qreal zoom)
+  : d(new QPdfDestinationPrivate(page, location, zoom))
+{
+}
+
+QPdfDestination::QPdfDestination(QPdfDestinationPrivate *d)
+  : d(d)
+{
+}
+
+QPdfDestination::QPdfDestination(const QPdfDestination &other)
+  : d(other.d)
+{
+}
+
+QPdfDestination::~QPdfDestination()
+{
+}
+
+/*!
+    \property QPdfDestination::valid
+
+    This property holds whether the destination is valid.
+*/
+bool QPdfDestination::isValid() const
+{
+    return d->page >= 0;
+}
+
+/*!
+    \property QPdfDestination::page
+
+    This property holds the page number.
+*/
+int QPdfDestination::page() const
+{
+    return d->page;
+}
+
+/*!
+    \property QPdfDestination::location
+
+    This property holds the location on the page, in units of points.
+*/
+QPointF QPdfDestination::location() const
+{
+    return d->location;
+}
+
+/*!
+    \property QPdfDestination::zoom
+
+    This property holds the suggested magnification level, where 1.0 means default scale
+    (1 pixel = 1 point).
+*/
+qreal QPdfDestination::zoom() const
+{
+    return d->zoom;
+}
+
+//QDataStream& operator<<(QDataStream& stream, const QPdfDestination& dest)
+//{
+//    stream << *dest.d.data();
+//    return stream;
+//}
+
+QDataStream& operator<<(QDataStream& stream, const QPdfDestinationPrivate& dest)
+{
+    stream << QStringLiteral("QPdfDestination") << dest.page << dest.location ; // << dest.zoom();
+    return stream;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qpdfdestination.cpp"