CUPS: Add support for accessible IPP printers

CUPS 2.2 adds accessible IPP printers to the list of destinations
that can be used. The "printer-uri-supported" option will be
present for those IPP printers that have been recently used.
https://github.com/OpenPrinting/cups/blob/master/cups/dest.c#L1611

Pick-to: 5.15 6.2 6.3
Change-Id: I49b4d2f1ee6d96e9bcc04ed1cc2ed48d7a6e7563
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/plugins/printsupport/cups/qcupsprintersupport.cpp b/src/plugins/printsupport/cups/qcupsprintersupport.cpp
index a13804b2b6..66a2678249 100644
--- a/src/plugins/printsupport/cups/qcupsprintersupport.cpp
+++ b/src/plugins/printsupport/cups/qcupsprintersupport.cpp
@@ -165,9 +165,12 @@ QStringList QCupsPrinterSupport::availablePrintDeviceIds() const
     list.reserve(count);
     for (int i = 0; i < count; ++i) {
         QString printerId = QString::fromLocal8Bit(dests[i].name);
-        if (dests[i].instance)
+        if (dests[i].instance) {
             printerId += u'/' + QString::fromLocal8Bit(dests[i].instance);
-        list.append(printerId);
+            list.append(printerId);
+        } else if (cupsGetOption("printer-uri-supported", dests[i].num_options, dests[i].options)) {
+            list.append(printerId);
+        }
     }
     cupsFreeDests(count, dests);
     return list;