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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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.LGPL3 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-3.0.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 (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "printer_worker.h"
#include "printing/pdfium_document_wrapper_qt.h"
#include <QPainter>
#include <QPrinter>
namespace QtWebEngineCore {
PrinterWorker::PrinterWorker(QSharedPointer<QByteArray> data, QPrinter *printer)
: m_data(data)
, m_printer(printer)
{
}
PrinterWorker::~PrinterWorker()
{
}
void PrinterWorker::print()
{
if (!m_data->size()) {
qWarning("Failure to print on printer %ls: Print result data is empty.",
qUtf16Printable(m_printer->printerName()));
Q_EMIT resultReady(false);
return;
}
PdfiumDocumentWrapperQt pdfiumWrapper(m_data->constData(), m_data->size());
int toPage = m_printer->toPage();
int fromPage = m_printer->fromPage();
bool ascendingOrder = true;
if (fromPage == 0 && toPage == 0) {
fromPage = 1;
toPage = pdfiumWrapper.pageCount();
}
fromPage = qMax(1, fromPage);
toPage = qMin(pdfiumWrapper.pageCount(), toPage);
if (m_printer->pageOrder() == QPrinter::LastPageFirst) {
qSwap(fromPage, toPage);
ascendingOrder = false;
}
int pageCopies = 1;
int documentCopies = 1;
if (!m_printer->supportsMultipleCopies())
documentCopies = m_printer->copyCount();
if (m_printer->collateCopies()) {
pageCopies = documentCopies;
documentCopies = 1;
}
bool isLandscape = pdfiumWrapper.pageIsLandscape(0);
QPageLayout::Orientation prevOrientation = m_printer->pageLayout().orientation();
m_printer->setPageOrientation(isLandscape ? QPageLayout::Landscape : QPageLayout::Portrait);
QPainter painter;
if (!painter.begin(m_printer)) {
qWarning("Failure to print on printer %ls: Could not open printer for painting.",
qUtf16Printable(m_printer->printerName()));
Q_EMIT resultReady(false);
return;
}
for (int printedDocuments = 0; printedDocuments < documentCopies; printedDocuments++) {
if (printedDocuments > 0)
m_printer->newPage();
int currentPageIndex = fromPage;
for (int i = 0; true; i++) {
prevOrientation = m_printer->pageLayout().orientation();
isLandscape = pdfiumWrapper.pageIsLandscape(currentPageIndex - 1);
m_printer->setPageOrientation(isLandscape ? QPageLayout::Landscape : QPageLayout::Portrait);
QSize pageSize = m_printer->pageRect().size();
if (i > 0)
m_printer->newPage();
for (int printedPages = 0; printedPages < pageCopies; printedPages++) {
if (m_printer->printerState() == QPrinter::Aborted
|| m_printer->printerState() == QPrinter::Error) {
Q_EMIT resultReady(false);
return;
}
if (printedPages > 0)
m_printer->newPage();
QImage currentImage = pdfiumWrapper.pageAsQImage(currentPageIndex - 1);
if (currentImage.isNull()) {
Q_EMIT resultReady(false);
return;
}
QRect targetRect = currentImage.rect();
// Scale down currentImage by both width and height to fit into the drawable area of the page.
float scaleFactor = (float)pageSize.width() / (float)targetRect.width();
targetRect = QRect(0, 0, targetRect.width() * scaleFactor, targetRect.height() * scaleFactor);
scaleFactor = (float)pageSize.height() / (float)targetRect.height();
targetRect = QRect(0, 0, targetRect.width() * scaleFactor, targetRect.height() * scaleFactor);
// Painting operations are automatically clipped to the bounds of the drawable part of the page.
painter.drawImage(targetRect, currentImage, currentImage.rect());
}
if (currentPageIndex == toPage)
break;
if (ascendingOrder)
currentPageIndex++;
else
currentPageIndex--;
m_printer->setPageOrientation(prevOrientation);
}
}
painter.end();
Q_EMIT resultReady(true);
return;
}
} // namespace QtWebEngineCore
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