subsurface/desktop-widgets/printer.cpp
Robert C. Helling 529a4d499b Start transition from QWebKit to QWebEngine
This removes all references to WebKit if cmake option USE_WEBKIT is enabled.
For the user manual it changes it to WebEngine (seems to work for me).

Similar for the Facebook connection (minus a reference to a cookie jar).
This I could not test at the moment, as I wrote this on a train.

Printing does not work, it is a null operation at the moment. Currently,
large parts of of the printing code are commented out as there is no direct
way to access page elements in WebEngine. It seems this needs to be done
via Javascript (with a callback invoked). There is new functionality in
WebEngine to render a view to a PDF file but this needs more work (and
probably some thoughts towards page breaks).

Signed-off-by: Robert C. Helling <helling@atdotde.de>
2016-12-30 19:43:00 +01:00

310 lines
10 KiB
C++

#include "printer.h"
#include "templatelayout.h"
#include "core/statistics.h"
#include "core/helpers.h"
#include <algorithm>
#include <QPainter>
#ifdef USE_WEBENGINE
#include <QtWebEngineWidgets>
#else
#include <QtWebKitWidgets>
#include <QWebElementCollection>
#include <QWebElement>
#endif
#include "profile-widget/profilewidget2.h"
Printer::Printer(QPaintDevice *paintDevice, print_options *printOptions, template_options *templateOptions, PrintMode printMode)
{
this->paintDevice = paintDevice;
this->printOptions = printOptions;
this->templateOptions = templateOptions;
this->printMode = printMode;
dpi = 0;
done = 0;
#ifdef USE_WEBENGINE
webView = new QWebEngineView();
#else
webView = new QWebView();
#endif
}
Printer::~Printer()
{
delete webView;
}
void Printer::putProfileImage(QRect profilePlaceholder, QRect viewPort, QPainter *painter, struct dive *dive, QPointer<ProfileWidget2> profile)
{
int x = profilePlaceholder.x() - viewPort.x();
int y = profilePlaceholder.y() - viewPort.y();
// use the placeHolder and the viewPort position to calculate the relative position of the dive profile.
QRect pos(x, y, profilePlaceholder.width(), profilePlaceholder.height());
profile->plotDive(dive, true);
if (!printOptions->color_selected) {
QImage image(pos.width(), pos.height(), QImage::Format_ARGB32);
QPainter imgPainter(&image);
imgPainter.setRenderHint(QPainter::Antialiasing);
imgPainter.setRenderHint(QPainter::SmoothPixmapTransform);
profile->render(&imgPainter, QRect(0, 0, pos.width(), pos.height()));
imgPainter.end();
// convert QImage to grayscale before rendering
for (int i = 0; i < image.height(); i++) {
QRgb *pixel = reinterpret_cast<QRgb *>(image.scanLine(i));
QRgb *end = pixel + image.width();
for (; pixel != end; pixel++) {
int gray_val = qGray(*pixel);
*pixel = QColor(gray_val, gray_val, gray_val).rgb();
}
}
painter->drawImage(pos, image);
} else {
profile->render(painter, pos);
}
}
void Printer::flowRender()
{
// add extra padding at the bottom to pages with height not divisible by view port
#ifndef USE_WEBENGINE
int paddingBottom = pageSize.height() - (webView->page()->mainFrame()->contentsSize().height() % pageSize.height());
QString styleString = QString::fromUtf8("padding-bottom: ") + QString::number(paddingBottom) + "px;";
webView->page()->mainFrame()->findFirstElement("body").setAttribute("style", styleString);
// render the Qwebview
QPainter painter;
QRect viewPort(0, 0, 0, 0);
painter.begin(paintDevice);
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::SmoothPixmapTransform);
// get all references to dontbreak divs
int start = 0, end = 0;
int fullPageResolution = webView->page()->mainFrame()->contentsSize().height();
QWebElementCollection dontbreak = webView->page()->mainFrame()->findAllElements(".dontbreak");
foreach (QWebElement dontbreakElement, dontbreak) {
if ((dontbreakElement.geometry().y() + dontbreakElement.geometry().height()) - start < pageSize.height()) {
// One more element can be placed
end = dontbreakElement.geometry().y() + dontbreakElement.geometry().height();
} else {
// fill the page with background color
QRect fullPage(0, 0, pageSize.width(), pageSize.height());
QBrush fillBrush(templateOptions->color_palette.color1);
painter.fillRect(fullPage, fillBrush);
QRegion reigon(0, 0, pageSize.width(), end - start);
viewPort.setRect(0, start, pageSize.width(), end - start);
// render the base Html template
webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer, reigon);
// scroll the webview to the next page
webView->page()->mainFrame()->scroll(0, dontbreakElement.geometry().y() - start);
// rendering progress is 4/5 of total work
emit(progessUpdated((end * 80.0 / fullPageResolution) + done));
// add new pages only in print mode, while previewing we don't add new pages
if (printMode == Printer::PRINT)
static_cast<QPrinter*>(paintDevice)->newPage();
else {
painter.end();
return;
}
start = dontbreakElement.geometry().y();
}
}
// render the remianing page
QRect fullPage(0, 0, pageSize.width(), pageSize.height());
QBrush fillBrush(templateOptions->color_palette.color1);
painter.fillRect(fullPage, fillBrush);
QRegion reigon(0, 0, pageSize.width(), end - start);
webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer, reigon);
painter.end();
#else
// FIX ME
#endif
}
void Printer::render(int Pages = 0)
{
// keep original preferences
QPointer<ProfileWidget2> profile = MainWindow::instance()->graphics();
int profileFrameStyle = profile->frameStyle();
int animationOriginal = prefs.animation_speed;
double fontScale = profile->getFontPrintScale();
double printFontScale = 1.0;
// apply printing settings to profile
profile->setFrameStyle(QFrame::NoFrame);
profile->setPrintMode(true, !printOptions->color_selected);
profile->setToolTipVisibile(false);
prefs.animation_speed = 0;
// render the Qwebview
QPainter painter;
QRect viewPort(0, 0, pageSize.width(), pageSize.height());
painter.begin(paintDevice);
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::SmoothPixmapTransform);
// get all refereces to diveprofile class in the Html template
#ifdef USE_WEBENGINE
//FIX ME
#else
QWebElementCollection collection = webView->page()->mainFrame()->findAllElements(".diveprofile");
QSize originalSize = profile->size();
if (collection.count() > 0) {
printFontScale = (double)collection.at(0).geometry().size().height() / (double)profile->size().height();
profile->resize(collection.at(0).geometry().size());
}
profile->setFontPrintScale(printFontScale);
int elemNo = 0;
for (int i = 0; i < Pages; i++) {
// render the base Html template
webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer);
// render all the dive profiles in the current page
while (elemNo < collection.count() && collection.at(elemNo).geometry().y() < viewPort.y() + viewPort.height()) {
// dive id field should be dive_{{dive_no}} se we remove the first 5 characters
QString diveIdString = collection.at(elemNo).attribute("id");
int diveId = diveIdString.remove(0, 5).toInt(0, 10);
putProfileImage(collection.at(elemNo).geometry(), viewPort, &painter, get_dive_by_uniq_id(diveId), profile);
elemNo++;
}
// scroll the webview to the next page
webView->page()->mainFrame()->scroll(0, pageSize.height());
viewPort.adjust(0, pageSize.height(), 0, pageSize.height());
// rendering progress is 4/5 of total work
emit(progessUpdated((i * 80.0 / Pages) + done));
if (i < Pages - 1 && printMode == Printer::PRINT)
static_cast<QPrinter*>(paintDevice)->newPage();
}
painter.end();
#endif
// return profle settings
profile->setFrameStyle(profileFrameStyle);
profile->setPrintMode(false);
profile->setFontPrintScale(fontScale);
profile->setToolTipVisibile(true);
#ifdef USE_WEBENGINE
//FIXME
#else
profile->resize(originalSize);
#endif
prefs.animation_speed = animationOriginal;
//replot the dive after returning the settings
profile->plotDive(0, true);
}
//value: ranges from 0 : 100 and shows the progress of the templating engine
void Printer::templateProgessUpdated(int value)
{
done = value / 5; //template progess if 1/5 of total work
emit progessUpdated(done);
}
void Printer::print()
{
// we can only print if "PRINT" mode is selected
if (printMode != Printer::PRINT) {
return;
}
QPrinter *printerPtr;
printerPtr = static_cast<QPrinter*>(paintDevice);
TemplateLayout t(printOptions, templateOptions);
connect(&t, SIGNAL(progressUpdated(int)), this, SLOT(templateProgessUpdated(int)));
dpi = printerPtr->resolution();
//rendering resolution = selected paper size in inchs * printer dpi
pageSize.setHeight(qCeil(printerPtr->pageRect(QPrinter::Inch).height() * dpi));
pageSize.setWidth(qCeil(printerPtr->pageRect(QPrinter::Inch).width() * dpi));
#ifdef USE_WEBENGINE
//FIXME
#else
webView->page()->setViewportSize(pageSize);
webView->page()->mainFrame()->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
#endif
// export border width with at least 1 pixel
templateOptions->border_width = std::max(1, pageSize.width() / 1000);
if (printOptions->type == print_options::DIVELIST) {
webView->setHtml(t.generate());
} else if (printOptions->type == print_options::STATISTICS ) {
webView->setHtml(t.generateStatistics());
}
if (printOptions->color_selected && printerPtr->colorMode()) {
printerPtr->setColorMode(QPrinter::Color);
} else {
printerPtr->setColorMode(QPrinter::GrayScale);
}
// apply user settings
int divesPerPage;
// get number of dives per page from data-numberofdives attribute in the body of the selected template
bool ok;
#ifdef USE_WEBENGINE
// FIX ME
#else
divesPerPage = webView->page()->mainFrame()->findFirstElement("body").attribute("data-numberofdives").toInt(&ok);
if (!ok) {
divesPerPage = 1; // print each dive in a single page if the attribute is missing or malformed
//TODO: show warning
}
#endif
int Pages;
if (divesPerPage == 0) {
flowRender();
} else {
Pages = qCeil(getTotalWork(printOptions) / (float)divesPerPage);
render(Pages);
}
}
void Printer::previewOnePage()
{
if (printMode == PREVIEW) {
TemplateLayout t(printOptions, templateOptions);
pageSize.setHeight(paintDevice->height());
pageSize.setWidth(paintDevice->width());
#ifdef USE_WEBENGINE
//FIXME
#else
webView->page()->setViewportSize(pageSize);
#endif
// initialize the border settings
templateOptions->border_width = std::max(1, pageSize.width() / 1000);
if (printOptions->type == print_options::DIVELIST) {
webView->setHtml(t.generate());
} else if (printOptions->type == print_options::STATISTICS ) {
webView->setHtml(t.generateStatistics());
}
#ifdef USE_WEBENGINE
// FIX ME
render(1);
#else
bool ok;
int divesPerPage = webView->page()->mainFrame()->findFirstElement("body").attribute("data-numberofdives").toInt(&ok);
if (!ok) {
divesPerPage = 1; // print each dive in a single page if the attribute is missing or malformed
//TODO: show warning
}
if (divesPerPage == 0) {
flowRender();
} else {
render(1);
}
#endif
}
}