Okular

fileprinter.cpp
1/*
2 SPDX-FileCopyrightText: 2007, 2010 John Layt <john@layt.net>
3
4 FilePrinterPreview based on KPrintPreview (originally LGPL)
5 SPDX-FileCopyrightText: 2007 Alex Merry <huntedhacker@tiscali.co.uk>
6
7 SPDX-License-Identifier: GPL-2.0-or-later
8*/
9
10#include "fileprinter.h"
11
12#include <QFile>
13#include <QFileInfo>
14#include <QLabel>
15#include <QPrintEngine>
16#include <QShowEvent>
17#include <QSize>
18#include <QStringList>
19#include <QTcpSocket>
20
21#include <KProcess>
22#include <KShell>
23#include <QDebug>
24#include <QStandardPaths>
25
26#include "debug_p.h"
27
28using namespace Okular;
29
30Document::PrintError
31FilePrinter::printFile(QPrinter &printer, const QString &file, QPageLayout::Orientation documentOrientation, FileDeletePolicy fileDeletePolicy, PageSelectPolicy pageSelectPolicy, const QString &pageRange, ScaleMode scaleMode)
32{
33 FilePrinter fp;
34 return fp.doPrintFiles(printer, QStringList(file), fileDeletePolicy, pageSelectPolicy, pageRange, documentOrientation, scaleMode);
35}
36
37static Document::PrintError doKProcessExecute(const QString &exe, const QStringList &argList)
38{
39 const int ret = KProcess::execute(exe, argList);
40 if (ret == -1) {
41 return Document::PrintingProcessCrashPrintError;
42 }
43 if (ret == -2) {
44 return Document::PrintingProcessStartPrintError;
45 }
46 if (ret < 0) {
47 return Document::UnknownPrintError;
48 }
49
50 return Document::NoPrintError;
51}
52
53Document::PrintError
54FilePrinter::doPrintFiles(QPrinter &printer, const QStringList &fileList, FileDeletePolicy fileDeletePolicy, PageSelectPolicy pageSelectPolicy, const QString &pageRange, QPageLayout::Orientation documentOrientation, ScaleMode scaleMode)
55{
56 if (fileList.size() < 1) {
57 return Document::NoFileToPrintError;
58 }
59
60 for (QStringList::ConstIterator it = fileList.constBegin(); it != fileList.constEnd(); ++it) {
61 if (!QFile::exists(*it)) {
62 return Document::UnableToFindFilePrintError;
63 }
64 }
65
66 if (printer.printerState() == QPrinter::Aborted || printer.printerState() == QPrinter::Error) {
67 return Document::InvalidPrinterStatePrintError;
68 }
69
70 QString exe;
71 QStringList argList;
72 Document::PrintError ret;
73
74 // Print to File if a filename set, assumes there must be only 1 file
75 if (!printer.outputFileName().isEmpty()) {
76 if (QFile::exists(printer.outputFileName())) {
77 QFile::remove(printer.outputFileName());
78 }
79
80 QFileInfo inputFileInfo = QFileInfo(fileList[0]);
81 QFileInfo outputFileInfo = QFileInfo(printer.outputFileName());
82
83 bool doDeleteFile = (fileDeletePolicy == FilePrinter::SystemDeletesFiles);
84 if (inputFileInfo.suffix() == outputFileInfo.suffix()) {
85 if (doDeleteFile) {
86 bool res = QFile::rename(fileList[0], printer.outputFileName());
87 if (res) {
88 doDeleteFile = false;
89 ret = Document::NoPrintError;
90 } else {
91 ret = Document::PrintToFilePrintError;
92 }
93 } else {
94 bool res = QFile::copy(fileList[0], printer.outputFileName());
95 if (res) {
96 ret = Document::NoPrintError;
97 } else {
98 ret = Document::PrintToFilePrintError;
99 }
100 }
101 } else if (inputFileInfo.suffix() == QLatin1String("ps") && printer.outputFormat() == QPrinter::PdfFormat && ps2pdfAvailable()) {
102 exe = QStringLiteral("ps2pdf");
103 argList << fileList[0] << printer.outputFileName();
104 qCDebug(OkularCoreDebug) << "Executing" << exe << "with arguments" << argList;
105 ret = doKProcessExecute(exe, argList);
106 } else if (inputFileInfo.suffix() == QLatin1String("pdf") && printer.outputFormat() == QPrinter::NativeFormat && pdf2psAvailable()) {
107 exe = QStringLiteral("pdf2ps");
108 argList << fileList[0] << printer.outputFileName();
109 qCDebug(OkularCoreDebug) << "Executing" << exe << "with arguments" << argList;
110 ret = doKProcessExecute(exe, argList);
111 } else {
112 ret = Document::PrintToFilePrintError;
113 }
114
115 if (doDeleteFile) {
116 QFile::remove(fileList[0]);
117 }
118
119 } else { // Print to a printer via lpr command
120
121 // Decide what executable to use to print with, need the CUPS version of lpr if available
122 // Some distros name the CUPS version of lpr as lpr-cups or lpr.cups so try those first
123 // before default to lpr, or failing that to lp
124
125 if (!QStandardPaths::findExecutable(QStringLiteral("lpr-cups")).isEmpty()) {
126 exe = QStringLiteral("lpr-cups");
127 } else if (!QStandardPaths::findExecutable(QStringLiteral("lpr.cups")).isEmpty()) {
128 exe = QStringLiteral("lpr.cups");
129 } else if (!QStandardPaths::findExecutable(QStringLiteral("lpr")).isEmpty()) {
130 exe = QStringLiteral("lpr");
131 } else if (!QStandardPaths::findExecutable(QStringLiteral("lp")).isEmpty()) {
132 exe = QStringLiteral("lp");
133 } else {
134 return Document::NoBinaryToPrintError;
135 }
136
137 bool useCupsOptions = cupsAvailable();
138 argList = printArguments(printer, fileDeletePolicy, pageSelectPolicy, useCupsOptions, pageRange, exe, documentOrientation, scaleMode) << fileList;
139 qCDebug(OkularCoreDebug) << "Executing" << exe << "with arguments" << argList;
140
141 ret = doKProcessExecute(exe, argList);
142 }
143
144 return ret;
145}
146
147QList<int> FilePrinter::pageList(QPrinter &printer, int lastPage, int currentPage, const QList<int> &selectedPageList)
148{
149 if (printer.printRange() == QPrinter::Selection) {
150 return selectedPageList;
151 }
152
153 int startPage, endPage;
154 QList<int> list;
155
156 if (printer.printRange() == QPrinter::PageRange) {
157 startPage = printer.fromPage();
158 endPage = printer.toPage();
159 } else if (printer.printRange() == QPrinter::CurrentPage) {
160 startPage = currentPage;
161 endPage = currentPage;
162 } else { // AllPages
163 startPage = 1;
164 endPage = lastPage;
165 }
166
167 for (int i = startPage; i <= endPage; i++) {
168 list << i;
169 }
170
171 return list;
172}
173
174bool FilePrinter::ps2pdfAvailable()
175{
176 return (!QStandardPaths::findExecutable(QStringLiteral("ps2pdf")).isEmpty());
177}
178
179bool FilePrinter::pdf2psAvailable()
180{
181 return (!QStandardPaths::findExecutable(QStringLiteral("pdf2ps")).isEmpty());
182}
183
184bool FilePrinter::cupsAvailable()
185{
186#if defined(Q_OS_UNIX) && !defined(Q_OS_OSX)
187 // Ideally we would have access to the private Qt method
188 // QCUPSSupport::cupsAvailable() to do this as it is very complex routine.
189 // However, if CUPS is available then QPrinter::supportsMultipleCopies() will always return true
190 // whereas if CUPS is not available it will return false.
191 // This behaviour is guaranteed never to change, so we can use it as a reliable substitute.
192 QPrinter testPrinter;
193 return testPrinter.supportsMultipleCopies();
194#else
195 return false;
196#endif
197}
198
199QStringList FilePrinter::printArguments(QPrinter &printer,
200 FileDeletePolicy fileDeletePolicy,
201 PageSelectPolicy pageSelectPolicy,
202 bool useCupsOptions,
203 const QString &pageRange,
204 const QString &version,
205 QPageLayout::Orientation documentOrientation,
206 ScaleMode scaleMode)
207{
208 QStringList argList;
209
210 if (!destination(printer, version).isEmpty()) {
211 argList << destination(printer, version);
212 }
213
214 if (!copies(printer, version).isEmpty()) {
215 argList << copies(printer, version);
216 }
217
218 if (!jobname(printer, version).isEmpty()) {
219 argList << jobname(printer, version);
220 }
221
222 if (!pages(printer, pageSelectPolicy, pageRange, useCupsOptions, version).isEmpty()) {
223 argList << pages(printer, pageSelectPolicy, pageRange, useCupsOptions, version);
224 }
225
226 if (useCupsOptions && !cupsOptions(printer, documentOrientation, scaleMode).isEmpty()) {
227 argList << cupsOptions(printer, documentOrientation, scaleMode);
228 }
229
230 if (!deleteFile(printer, fileDeletePolicy, version).isEmpty()) {
231 argList << deleteFile(printer, fileDeletePolicy, version);
232 }
233
234 if (version == QLatin1String("lp")) {
235 argList << QStringLiteral("--");
236 }
237
238 return argList;
239}
240
241QStringList FilePrinter::destination(QPrinter &printer, const QString &version)
242{
243 if (version == QLatin1String("lp")) {
244 return QStringList(QStringLiteral("-d")) << printer.printerName();
245 }
246
247 if (version.startsWith(QLatin1String("lpr"))) {
248 return QStringList(QStringLiteral("-P")) << printer.printerName();
249 }
250
251 return QStringList();
252}
253
254QStringList FilePrinter::copies(QPrinter &printer, const QString &version)
255{
256 int cp = printer.copyCount();
257
258 if (version == QLatin1String("lp")) {
259 return QStringList(QStringLiteral("-n")) << QStringLiteral("%1").arg(cp);
260 }
261
262 if (version.startsWith(QLatin1String("lpr"))) {
263 return QStringList() << QStringLiteral("-#%1").arg(cp);
264 }
265
266 return QStringList();
267}
268
269QStringList FilePrinter::jobname(QPrinter &printer, const QString &version)
270{
271 if (!printer.docName().isEmpty()) {
272 if (version == QLatin1String("lp")) {
273 return QStringList(QStringLiteral("-t")) << printer.docName();
274 }
275
276 if (version.startsWith(QLatin1String("lpr"))) {
277 const QString shortenedDocName = QString::fromUtf8(printer.docName().toUtf8().left(255));
278 return QStringList(QStringLiteral("-J")) << shortenedDocName;
279 }
280 }
281
282 return QStringList();
283}
284
285QStringList FilePrinter::deleteFile(QPrinter &, FileDeletePolicy fileDeletePolicy, const QString &version)
286{
287 if (fileDeletePolicy == FilePrinter::SystemDeletesFiles && version.startsWith(QLatin1String("lpr"))) {
288 return QStringList(QStringLiteral("-r"));
289 }
290
291 return QStringList();
292}
293
294QStringList FilePrinter::pages(QPrinter &printer, PageSelectPolicy pageSelectPolicy, const QString &pageRange, bool useCupsOptions, const QString &version)
295{
296 if (pageSelectPolicy == FilePrinter::SystemSelectsPages) {
297 if (printer.printRange() == QPrinter::Selection && !pageRange.isEmpty()) {
298 if (version == QLatin1String("lp")) {
299 return QStringList(QStringLiteral("-P")) << pageRange;
300 }
301
302 if (version.startsWith(QLatin1String("lpr")) && useCupsOptions) {
303 return QStringList(QStringLiteral("-o")) << QStringLiteral("page-ranges=%1").arg(pageRange);
304 }
305 }
306
307 if (printer.printRange() == QPrinter::PageRange) {
308 if (version == QLatin1String("lp")) {
309 return QStringList(QStringLiteral("-P")) << QStringLiteral("%1-%2").arg(printer.fromPage()).arg(printer.toPage());
310 }
311
312 if (version.startsWith(QLatin1String("lpr")) && useCupsOptions) {
313 return QStringList(QStringLiteral("-o")) << QStringLiteral("page-ranges=%1-%2").arg(printer.fromPage()).arg(printer.toPage());
314 }
315 }
316 }
317
318 return QStringList(); // AllPages
319}
320
321QStringList FilePrinter::cupsOptions(QPrinter &printer, QPageLayout::Orientation documentOrientation, ScaleMode scaleMode)
322{
323 QStringList optionList;
324
325 if (!optionMedia(printer).isEmpty()) {
326 optionList << optionMedia(printer);
327 }
328
329 if (!optionOrientation(printer, documentOrientation).isEmpty()) {
330 optionList << optionOrientation(printer, documentOrientation);
331 }
332
333 if (!optionDoubleSidedPrinting(printer).isEmpty()) {
334 optionList << optionDoubleSidedPrinting(printer);
335 }
336
337 if (!optionPageOrder(printer).isEmpty()) {
338 optionList << optionPageOrder(printer);
339 }
340
341 if (!optionCollateCopies(printer).isEmpty()) {
342 optionList << optionCollateCopies(printer);
343 }
344
345 if (!optionPageMargins(printer, scaleMode).isEmpty()) {
346 optionList << optionPageMargins(printer, scaleMode);
347 }
348
349 optionList << optionCupsProperties(printer);
350
351 return optionList;
352}
353
354QStringList FilePrinter::optionMedia(QPrinter &printer)
355{
356 if (!mediaPageSize(printer).isEmpty() && !mediaPaperSource(printer).isEmpty()) {
357 return QStringList(QStringLiteral("-o")) << QStringLiteral("media=%1,%2").arg(mediaPageSize(printer), mediaPaperSource(printer));
358 }
359
360 if (!mediaPageSize(printer).isEmpty()) {
361 return QStringList(QStringLiteral("-o")) << QStringLiteral("media=%1").arg(mediaPageSize(printer));
362 }
363
364 if (!mediaPaperSource(printer).isEmpty()) {
365 return QStringList(QStringLiteral("-o")) << QStringLiteral("media=%1").arg(mediaPaperSource(printer));
366 }
367
368 return QStringList();
369}
370
371QString FilePrinter::mediaPageSize(QPrinter &printer)
372{
373 switch (printer.pageLayout().pageSize().id()) {
374 case QPageSize::A0:
375 return QStringLiteral("A0");
376 case QPageSize::A1:
377 return QStringLiteral("A1");
378 case QPageSize::A2:
379 return QStringLiteral("A2");
380 case QPageSize::A3:
381 return QStringLiteral("A3");
382 case QPageSize::A4:
383 return QStringLiteral("A4");
384 case QPageSize::A5:
385 return QStringLiteral("A5");
386 case QPageSize::A6:
387 return QStringLiteral("A6");
388 case QPageSize::A7:
389 return QStringLiteral("A7");
390 case QPageSize::A8:
391 return QStringLiteral("A8");
392 case QPageSize::A9:
393 return QStringLiteral("A9");
394 case QPageSize::B0:
395 return QStringLiteral("B0");
396 case QPageSize::B1:
397 return QStringLiteral("B1");
398 case QPageSize::B10:
399 return QStringLiteral("B10");
400 case QPageSize::B2:
401 return QStringLiteral("B2");
402 case QPageSize::B3:
403 return QStringLiteral("B3");
404 case QPageSize::B4:
405 return QStringLiteral("B4");
406 case QPageSize::B5:
407 return QStringLiteral("B5");
408 case QPageSize::B6:
409 return QStringLiteral("B6");
410 case QPageSize::B7:
411 return QStringLiteral("B7");
412 case QPageSize::B8:
413 return QStringLiteral("B8");
414 case QPageSize::B9:
415 return QStringLiteral("B9");
416 case QPageSize::C5E:
417 return QStringLiteral("C5"); // Correct Translation?
418 case QPageSize::Comm10E:
419 return QStringLiteral("Comm10"); // Correct Translation?
420 case QPageSize::DLE:
421 return QStringLiteral("DL"); // Correct Translation?
422 case QPageSize::Executive:
423 return QStringLiteral("Executive");
424 case QPageSize::Folio:
425 return QStringLiteral("Folio");
426 case QPageSize::Ledger:
427 return QStringLiteral("Ledger");
428 case QPageSize::Legal:
429 return QStringLiteral("Legal");
430 case QPageSize::Letter:
431 return QStringLiteral("Letter");
432 case QPageSize::Tabloid:
433 return QStringLiteral("Tabloid");
434 case QPageSize::Custom:
435 return QStringLiteral("Custom.%1x%2mm").arg(printer.widthMM()).arg(printer.heightMM());
436 default:
437 return QString();
438 }
439}
440
441// What about Upper and MultiPurpose? And others in PPD???
442QString FilePrinter::mediaPaperSource(QPrinter &printer)
443{
444 switch (printer.paperSource()) {
445 case QPrinter::Auto:
446 return QString();
447 case QPrinter::Cassette:
448 return QStringLiteral("Cassette");
449 case QPrinter::Envelope:
450 return QStringLiteral("Envelope");
451 case QPrinter::EnvelopeManual:
452 return QStringLiteral("EnvelopeManual");
453 case QPrinter::FormSource:
454 return QStringLiteral("FormSource");
455 case QPrinter::LargeCapacity:
456 return QStringLiteral("LargeCapacity");
457 case QPrinter::LargeFormat:
458 return QStringLiteral("LargeFormat");
459 case QPrinter::Lower:
460 return QStringLiteral("Lower");
461 case QPrinter::MaxPageSource:
462 return QStringLiteral("MaxPageSource");
463 case QPrinter::Middle:
464 return QStringLiteral("Middle");
465 case QPrinter::Manual:
466 return QStringLiteral("Manual");
467 case QPrinter::OnlyOne:
468 return QStringLiteral("OnlyOne");
469 case QPrinter::Tractor:
470 return QStringLiteral("Tractor");
471 case QPrinter::SmallFormat:
472 return QStringLiteral("SmallFormat");
473 default:
474 return QString();
475 }
476}
477
478QStringList FilePrinter::optionOrientation(QPrinter &printer, QPageLayout::Orientation documentOrientation)
479{
480 // portrait and landscape options rotate the document according to the document orientation
481 // If we want to print a landscape document as one would expect it, we have to pass the
482 // portrait option so that the document is not rotated additionally
483 if (printer.pageLayout().orientation() == documentOrientation) {
484 // the user wants the document printed as is
485 return QStringList(QStringLiteral("-o")) << QStringLiteral("portrait");
486 } else {
487 // the user expects the document being rotated by 90 degrees
488 return QStringList(QStringLiteral("-o")) << QStringLiteral("landscape");
489 }
490}
491
492QStringList FilePrinter::optionDoubleSidedPrinting(QPrinter &printer)
493{
494 switch (printer.duplex()) {
495 case QPrinter::DuplexNone:
496 return QStringList(QStringLiteral("-o")) << QStringLiteral("sides=one-sided");
497 case QPrinter::DuplexAuto:
498 if (printer.pageLayout().orientation() == QPageLayout::Landscape) {
499 return QStringList(QStringLiteral("-o")) << QStringLiteral("sides=two-sided-short-edge");
500 } else {
501 return QStringList(QStringLiteral("-o")) << QStringLiteral("sides=two-sided-long-edge");
502 }
503 case QPrinter::DuplexLongSide:
504 return QStringList(QStringLiteral("-o")) << QStringLiteral("sides=two-sided-long-edge");
505 case QPrinter::DuplexShortSide:
506 return QStringList(QStringLiteral("-o")) << QStringLiteral("sides=two-sided-short-edge");
507 default:
508 return QStringList(); // Use printer default
509 }
510}
511
512QStringList FilePrinter::optionPageOrder(QPrinter &printer)
513{
514 if (printer.pageOrder() == QPrinter::LastPageFirst) {
515 return QStringList(QStringLiteral("-o")) << QStringLiteral("outputorder=reverse");
516 }
517 return QStringList(QStringLiteral("-o")) << QStringLiteral("outputorder=normal");
518}
519
520QStringList FilePrinter::optionCollateCopies(QPrinter &printer)
521{
522 if (printer.collateCopies()) {
523 return QStringList(QStringLiteral("-o")) << QStringLiteral("Collate=True");
524 }
525 return QStringList(QStringLiteral("-o")) << QStringLiteral("Collate=False");
526}
527
528QStringList FilePrinter::optionPageMargins(QPrinter &printer, ScaleMode scaleMode)
529{
530 if (printer.printEngine()->property(QPrintEngine::PPK_PageMargins).isNull()) {
531 return QStringList();
532 } else {
533 qreal l(0), t(0), r(0), b(0);
534 if (!printer.fullPage()) {
535 auto marginsf = printer.pageLayout().margins(QPageLayout::Point);
536 l = marginsf.left();
537 t = marginsf.top();
538 r = marginsf.right();
539 b = marginsf.bottom();
540 }
541 QStringList marginOptions;
542 marginOptions << (QStringLiteral("-o")) << QStringLiteral("page-left=%1").arg(l) << QStringLiteral("-o") << QStringLiteral("page-top=%1").arg(t) << QStringLiteral("-o") << QStringLiteral("page-right=%1").arg(r)
543 << QStringLiteral("-o") << QStringLiteral("page-bottom=%1").arg(b);
544 if (scaleMode == ScaleMode::FitToPrintArea) {
545 marginOptions << QStringLiteral("-o") << QStringLiteral("fit-to-page");
546 }
547
548 return marginOptions;
549 }
550}
551
552QStringList FilePrinter::optionCupsProperties(QPrinter &printer)
553{
554 QStringList dialogOptions = printer.printEngine()->property(QPrintEngine::PrintEnginePropertyKey(0xfe00)).toStringList();
555 QStringList cupsOptions;
556
557 for (int i = 0; i < dialogOptions.count(); i = i + 2) {
558 if (dialogOptions[i + 1].isEmpty()) {
559 cupsOptions << QStringLiteral("-o") << dialogOptions[i];
560 } else {
561 cupsOptions << QStringLiteral("-o") << dialogOptions[i] + QLatin1Char('=') + dialogOptions[i + 1];
562 }
563 }
564
565 return cupsOptions;
566}
567
568/* kate: replace-tabs on; indent-width 4; */
KProcess::execute
int execute(int msecs=-1)
Okular::Document::NoPrintError
@ NoPrintError
Printing succeeded.
Definition document.h:839
KRecentDirs::list
KIOCORE_EXPORT QStringList list(const QString &fileClass)
KStandardAction::lastPage
QAction * lastPage(const QObject *recvr, const char *slot, QObject *parent)
NetworkManager::version
NETWORKMANAGERQT_EXPORT QString version()
Okular
global.h
Definition action.h:17
QByteArray::left
QByteArray left(qsizetype len) const const
QFile::copy
bool copy(const QString &fileName, const QString &newName)
QFile::exists
bool exists() const const
QFile::remove
bool remove()
QFile::rename
bool rename(const QString &newName)
QFileInfo::suffix
QString suffix() const const
QList::ConstIterator
typedef ConstIterator
QList::constBegin
const_iterator constBegin() const const
QList::constEnd
const_iterator constEnd() const const
QList::count
qsizetype count() const const
QList::size
qsizetype size() const const
QMarginsF::left
qreal left() const const
QPagedPaintDevice::pageLayout
QPageLayout pageLayout() const const
QPageLayout::margins
QMarginsF margins() const const
QPageLayout::orientation
Orientation orientation() const const
QPageLayout::pageSize
QPageSize pageSize() const const
QPageSize::id
PageSizeId id(const QSize &pointSize, SizeMatchPolicy matchPolicy)
QPaintDevice::heightMM
int heightMM() const const
QPaintDevice::widthMM
int widthMM() const const
QPrintEngine::property
virtual QVariant property(PrintEnginePropertyKey key) const const=0
QPrinter::collateCopies
bool collateCopies() const const
QPrinter::copyCount
int copyCount() const const
QPrinter::docName
QString docName() const const
QPrinter::duplex
DuplexMode duplex() const const
QPrinter::fromPage
int fromPage() const const
QPrinter::fullPage
bool fullPage() const const
QPrinter::outputFileName
QString outputFileName() const const
QPrinter::outputFormat
OutputFormat outputFormat() const const
QPrinter::pageOrder
PageOrder pageOrder() const const
QPrinter::paperSource
PaperSource paperSource() const const
QPrinter::printEngine
QPrintEngine * printEngine() const const
QPrinter::printRange
PrintRange printRange() const const
QPrinter::printerName
QString printerName() const const
QPrinter::printerState
PrinterState printerState() const const
QPrinter::supportsMultipleCopies
bool supportsMultipleCopies() const const
QPrinter::toPage
int toPage() const const
QStandardPaths::findExecutable
QString findExecutable(const QString &executableName, const QStringList &paths)
QString::fromUtf8
QString fromUtf8(QByteArrayView str)
QString::isEmpty
bool isEmpty() const const
QString::startsWith
bool startsWith(QChar c, Qt::CaseSensitivity cs) const const
QString::toUtf8
QByteArray toUtf8() const const
QVariant::isNull
bool isNull() const const
QVariant::toStringList
QStringList toStringList() const const
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