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Diffstat (limited to 'src/webenginewidgets/printer_worker.cpp')
-rw-r--r-- | src/webenginewidgets/printer_worker.cpp | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/webenginewidgets/printer_worker.cpp b/src/webenginewidgets/printer_worker.cpp new file mode 100644 index 000000000..3a670ad49 --- /dev/null +++ b/src/webenginewidgets/printer_worker.cpp @@ -0,0 +1,147 @@ +/**************************************************************************** +** +** 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; + } + + QSize pageSize = m_printer->pageRect().size(); + PdfiumDocumentWrapperQt pdfiumWrapper(m_data->constData(), m_data->size(), pageSize); + + 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; + } + + 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++) { + int currentPageIndex = fromPage; + while (true) { + for (int printedPages = 0; printedPages < pageCopies; printedPages++) { + if (m_printer->printerState() == QPrinter::Aborted + || m_printer->printerState() == QPrinter::Error) { + Q_EMIT resultReady(false); + return; + } + + QImage currentImage = pdfiumWrapper.pageAsQImage(currentPageIndex - 1); + if (currentImage.isNull()) { + Q_EMIT resultReady(false); + return; + } + + // Painting operations are automatically clipped to the bounds of the drawable part of the page. + painter.drawImage(QRect(0, 0, pageSize.width(), pageSize.height()), currentImage, currentImage.rect()); + if (printedPages < pageCopies - 1) + m_printer->newPage(); + } + + if (currentPageIndex == toPage) + break; + + if (ascendingOrder) + currentPageIndex++; + else + currentPageIndex--; + + m_printer->newPage(); + } + if (printedDocuments < documentCopies - 1) + m_printer->newPage(); + } + painter.end(); + + Q_EMIT resultReady(true); + return; +} + +} // namespace QtWebEngineCore |