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/****************************************************************************
**
** Copyright (C) 2021 Doug Massay
**
** This file is part of PageEdit.
**
** PageEdit is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** PageEdit is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with PageEdit. If not, see <http://www.gnu.org/licenses/>.
**
****************************************************************************/
#include "webviewprinter.h"
#include <QEventLoop>
#include <QPrintDialog>
#include <QPrinter>
#include <QPainter>
#include <QFileInfo>
#include <QDir>
#include <QUrl>
#include <QPrintPreviewDialog>
#include <QtWebEngineWidgets>
#include <QtWebEngineCore>
#include <QWebEngineView>
#include <QWebEnginePage>
#include <QStandardPaths>
#include <QDebug>
#define DBG if(0)
WebViewPrinter::WebViewPrinter(QObject *parent)
: QObject(parent)
{
}
WebViewPrinter::~WebViewPrinter()
{
if (m_view){
delete m_view;
m_view = nullptr;
m_skipPreview = false;
}
DBG qDebug() << "WebViewPrinter destroyed";
}
void WebViewPrinter::setPage(QUrl url, bool skipPrev)
{
// destroy previous QWebEngineView to avoid leaking
if (m_view){
delete m_view;
m_view = nullptr;
DBG qDebug() << "Cleaning up old WebEngineView";
}
m_skipPreview = skipPrev;
m_inPrintPreview = false;
DBG qDebug() << "URL of page to print: " << url;
// Create new (undisplayed) QWebEngineView to which the EPUB's
// page url is loaded without any potential darkmode injections
m_view = new QWebEngineView();
connect(m_view, &QWebEngineView::loadFinished, this, &WebViewPrinter::loadFinished);
m_view->setUrl(url);
}
QString WebViewPrinter::getPrintToFilePath(QFileInfo &fi) {
QString filename = fi.baseName() + ".pdf";
QString path = QDir(QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation)).filePath(filename);
return path;
}
void WebViewPrinter::print()
{
DBG qDebug() << "Skipping Print Preview.";
QPrinter printer;
#if !defined(Q_OS_WIN32) && !defined(Q_OS_MAC)
QFileInfo fi = QFileInfo(m_view->page()->url().fileName());
QString path = getPrintToFilePath(fi);
DBG qDebug() << "Default Print to PDF file name on Linux: " << path;
printer.setOutputFileName(path);
#endif
//m_view->setAttribute(Qt::WA_DontShowOnScreen);
//m_view->show();
QPrintDialog dialog(&printer);
if (dialog.exec() != QDialog::Accepted)
return;
printDocument(&printer);
}
void WebViewPrinter::printDocument(QPrinter *printer)
{
QEventLoop loop;
bool result;
auto printCallback = [&](bool success) { result = success; loop.quit(); };
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
m_view->page()->print(printer, std::move(printCallback));
#else
connect(m_view, &QWebEngineView::printFinished, std::move(printCallback));
m_view->print(printer);
#endif
loop.exec();
if (!result) {
DBG qDebug() << "Could not print document.";
QPainter painter;
if (painter.begin(printer)) {
QFont font = painter.font();
font.setPixelSize(20);
painter.setFont(font);
painter.drawText(QPointF(10,25),
QStringLiteral("Could not print document."));
painter.end();
}
}
}
void WebViewPrinter::printPreview()
{
DBG qDebug() << "Launching Print Preview.";
if (!m_view->page())
return;
if (m_inPrintPreview)
return;
m_inPrintPreview = true;
QPrinter printer;
#if !defined(Q_OS_WIN32) && !defined(Q_OS_MAC)
QFileInfo fi = QFileInfo(m_view->page()->url().fileName());
QString path = getPrintToFilePath(fi);
DBG qDebug() << "Default Print to PDF file name on Linux: " << path;
printer.setOutputFileName(path);
#endif
QPrintPreviewDialog preview(&printer, m_view);
connect(&preview, &QPrintPreviewDialog::paintRequested,
this, &WebViewPrinter::printDocument);
preview.exec();
m_inPrintPreview = false;
}
void WebViewPrinter::loadFinished(bool ok)
{
if (ok) {
// load QPrintPreview dialog or go directly to Print dialog
if (!m_skipPreview) {
printPreview();
} else {
print();
}
}
else {
DBG qDebug() << "not successfully loaded.";
}
}
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