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-rw-r--r--src/pdf/qpdfpagenavigation.cpp290
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diff --git a/src/pdf/qpdfpagenavigation.cpp b/src/pdf/qpdfpagenavigation.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Tobias König <tobias.koenig@kdab.com>
-** 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 "qpdfpagenavigation.h"
-
-#include "qpdfdocument.h"
-
-#include <private/qobject_p.h>
-
-#include <QPointer>
-
-QT_BEGIN_NAMESPACE
-
-class QPdfPageNavigationPrivate
-{
-public:
- QPdfPageNavigationPrivate(QPdfPageNavigation *q) : q_ptr(q) { }
-
- void update()
- {
- const bool documentAvailable = m_document && m_document->status() == QPdfDocument::Ready;
-
- if (documentAvailable) {
- const int newPageCount = m_document->pageCount();
- if (m_pageCount != newPageCount) {
- m_pageCount = newPageCount;
- emit q_ptr->pageCountChanged(m_pageCount);
- }
- } else {
- if (m_pageCount != 0) {
- m_pageCount = 0;
- emit q_ptr->pageCountChanged(m_pageCount);
- }
- }
-
- if (m_currentPage != 0) {
- m_currentPage = 0;
- emit q_ptr->currentPageChanged(m_currentPage);
- }
-
- updatePrevNext();
- }
-
- void updatePrevNext()
- {
- const bool hasPreviousPage = m_currentPage > 0;
- const bool hasNextPage = m_currentPage < (m_pageCount - 1);
-
- if (m_canGoToPreviousPage != hasPreviousPage) {
- m_canGoToPreviousPage = hasPreviousPage;
- emit q_ptr->canGoToPreviousPageChanged(m_canGoToPreviousPage);
- }
-
- if (m_canGoToNextPage != hasNextPage) {
- m_canGoToNextPage = hasNextPage;
- emit q_ptr->canGoToNextPageChanged(m_canGoToNextPage);
- }
- }
-
- void documentStatusChanged()
- {
- update();
- }
-
- QPdfPageNavigation *q_ptr = nullptr;
- QPointer<QPdfDocument> m_document = nullptr;
- int m_currentPage = 0;
- int m_pageCount = 0;
- bool m_canGoToPreviousPage = false;
- bool m_canGoToNextPage = false;
-
- QMetaObject::Connection m_documentStatusChangedConnection;
-};
-
-/*!
- \class QPdfPageNavigation
- \since 5.10
- \inmodule QtPdf
-
- \brief The QPdfPageNavigation class handles the navigation through a PDF document.
-
- \sa QPdfDocument
-*/
-
-
-/*!
- Constructs a page navigation object with parent object \a parent.
-*/
-QPdfPageNavigation::QPdfPageNavigation(QObject *parent)
- : QObject(parent), d_ptr(new QPdfPageNavigationPrivate(this))
-{
-}
-
-/*!
- Destroys the page navigation object.
-*/
-QPdfPageNavigation::~QPdfPageNavigation()
-{
-}
-
-/*!
- \property QPdfPageNavigation::document
- \brief The document instance on which this object navigates.
-
- By default, this property is \c nullptr.
-
- \sa document(), setDocument(), QPdfDocument
-*/
-
-/*!
- Returns the document on which this object navigates, or a \c nullptr
- if none has set before.
-
- \sa QPdfDocument
-*/
-QPdfDocument* QPdfPageNavigation::document() const
-{
- return d_ptr->m_document;
-}
-
-/*!
- Sets the \a document this object navigates on.
-
- After a new document has been set, the currentPage will be \c 0.
-
- \sa QPdfDocument
-*/
-void QPdfPageNavigation::setDocument(QPdfDocument *document)
-{
- if (d_ptr->m_document == document)
- return;
-
- if (d_ptr->m_document)
- disconnect(d_ptr->m_documentStatusChangedConnection);
-
- d_ptr->m_document = document;
- emit documentChanged(d_ptr->m_document);
-
- if (d_ptr->m_document)
- d_ptr->m_documentStatusChangedConnection =
- connect(d_ptr->m_document.data(), &QPdfDocument::statusChanged, this,
- [this]() { d_ptr->documentStatusChanged(); });
-
- d_ptr->update();
-}
-
-/*!
- \property QPdfPageNavigation::currentPage
- \brief The current page number in the document.
-
- \sa currentPage(), setCurrentPage()
-*/
-
-/*!
- Returns the current page number or \c 0 if there is no document set.
-
- After a document has been loaded, the currentPage will always be \c 0.
-*/
-int QPdfPageNavigation::currentPage() const
-{
- return d_ptr->m_currentPage;
-}
-
-/*!
- \fn void QPdfPageNavigation::setCurrentPage(int page)
-
- Sets the current \a page number.
-*/
-void QPdfPageNavigation::setCurrentPage(int newPage)
-{
- if (newPage < 0 || newPage >= d_ptr->m_pageCount)
- return;
-
- if (d_ptr->m_currentPage == newPage)
- return;
-
- d_ptr->m_currentPage = newPage;
- emit currentPageChanged(d_ptr->m_currentPage);
-
- d_ptr->updatePrevNext();
-}
-
-/*!
- \property QPdfPageNavigation::pageCount
- \brief The number of pages in the document.
-
- \sa pageCount()
-*/
-
-/*!
- Returns the number of pages in the document or \c 0 if there
- is no document set.
-*/
-int QPdfPageNavigation::pageCount() const
-{
- return d_ptr->m_pageCount;
-}
-
-/*!
- \property QPdfPageNavigation::canGoToPreviousPage
- \brief Indicates whether there is a page before the current page.
-
- \sa canGoToPreviousPage(), goToPreviousPage()
-*/
-
-/*!
- Returns whether there is a page before the current one.
-*/
-bool QPdfPageNavigation::canGoToPreviousPage() const
-{
- return d_ptr->m_canGoToPreviousPage;
-}
-
-/*!
- \property QPdfPageNavigation::canGoToNextPage
- \brief Indicates whether there is a page after the current page.
-
- \sa canGoToNextPage(), goToNextPage()
-*/
-
-/*!
- Returns whether there is a page after the current one.
-*/
-bool QPdfPageNavigation::canGoToNextPage() const
-{
- return d_ptr->m_canGoToNextPage;
-}
-
-/*!
- Changes the current page to the previous page.
-
- If there is no previous page in the document, nothing happens.
-
- \sa canGoToPreviousPage
-*/
-void QPdfPageNavigation::goToPreviousPage()
-{
- if (d_ptr->m_currentPage > 0)
- setCurrentPage(d_ptr->m_currentPage - 1);
-}
-
-/*!
- Changes the current page to the next page.
-
- If there is no next page in the document, nothing happens.
-
- \sa canGoToNextPage
-*/
-void QPdfPageNavigation::goToNextPage()
-{
- if (d_ptr->m_currentPage < d_ptr->m_pageCount - 1)
- setCurrentPage(d_ptr->m_currentPage + 1);
-}
-
-QT_END_NAMESPACE
-
-#include "moc_qpdfpagenavigation.cpp"
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