| /**************************************************************************** |
| ** |
| ** 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 |
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| ** GNU Lesser General Public License Usage |
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| ** General Public License version 3 as published by the Free Software |
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| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
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| ** |
| ** 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 |
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| ****************************************************************************/ |
| |
| #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; |
| } |
| |
| qreal resolution = m_printer->resolution() / 72.0; // pdfium uses points so 1/72 inch |
| |
| QPainter painter; |
| |
| for (int printedDocuments = 0; printedDocuments < documentCopies; printedDocuments++) { |
| if (printedDocuments > 0) |
| m_printer->newPage(); |
| |
| int currentPageIndex = fromPage; |
| |
| for (int i = 0; true; i++) { |
| QSizeF documentSize = (pdfiumWrapper.pageSize(currentPageIndex - 1) * resolution); |
| bool isLandscape = documentSize.width() > documentSize.height(); |
| m_printer->setPageOrientation(isLandscape ? QPageLayout::Landscape : QPageLayout::Portrait); |
| QRectF pageRect = m_printer->pageRect(QPrinter::DevicePixel); |
| documentSize = documentSize.scaled(pageRect.size(), Qt::KeepAspectRatio); |
| |
| // setPageOrientation has to be called before qpainter.begin() or before qprinter.newPage() so correct metrics is used, |
| // therefore call begin now for only first page |
| if (!painter.isActive() && !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; |
| } |
| |
| 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,documentSize.width(),documentSize.height()); |
| if (currentImage.isNull()) { |
| Q_EMIT resultReady(false); |
| return; |
| } |
| painter.drawImage(0,0, currentImage); |
| } |
| |
| if (currentPageIndex == toPage) |
| break; |
| |
| if (ascendingOrder) |
| currentPageIndex++; |
| else |
| currentPageIndex--; |
| } |
| } |
| painter.end(); |
| |
| Q_EMIT resultReady(true); |
| return; |
| } |
| |
| } // namespace QtWebEngineCore |