FileChooser portal: skip empty filters to avoid rejection from portals

Xdg-desktop-portal will reject any OpenFile request if there is an empty
filter. We will just simply skip it to avoid the rejection so users get
a file dialog.

Change-Id: I85c056f46b22cdbc9e14010bc3c49206b6f8f002
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 316bf124437f4aaef10c29db5a158092ca7a832a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportalfiledialog.cpp b/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportalfiledialog.cpp
index cf3c2c9e9b..c4dc2da623 100644
--- a/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportalfiledialog.cpp
+++ b/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportalfiledialog.cpp
@@ -248,6 +248,11 @@ void QXdgDesktopPortalFileDialog::openPortal()
                 QString userVisibleName = match.captured(1);
                 QStringList filterStrings = match.captured(2).split(QLatin1Char(' '), Qt::SkipEmptyParts);
 
+                if (filterStrings.isEmpty()) {
+                    qWarning() << "Filter " << userVisibleName << " is empty and will be ignored.";
+                    continue;
+                }
+
                 FilterConditionList filterConditions;
                 for (const QString &filterString : filterStrings) {
                     FilterCondition filterCondition;