Folders Panel: Show expansion toggles for directories on ISO-images

When counting the number of sub-directories consider unknown file types
as potential directories. In the "worst case" an expansion toggle will be
shown although the directory contains only files, however from a performance
point of view this seems to be an acceptable compromise.

BUG: 292642
FIXED-IN: 4.8.1

1 files changed, 3 insertions, 1 deletions

diff --git a/src/kitemviews/kfileitemmodelrolesupdater.cpp b/src/kitemviews/kfileitemmodelrolesupdater.cpp
index 0c204e474..14e7f00ff 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.cpp
+++ b/src/kitemviews/kfileitemmodelrolesupdater.cpp
@@ -839,7 +839,9 @@ int KFileItemModelRolesUpdater::subItemsCount(const QString& path) const
                 }
             }
 
-            if (!showFoldersOnly || dirEntry->d_type == DT_DIR) {
+            // If only directories are counted, consider an unknown file type also
+            // as directory instead of trying to do an expensive stat() (see bug 292642).
+            if (!showFoldersOnly || dirEntry->d_type == DT_DIR || dirEntry->d_type == DT_UNKNOWN) {
                 ++count;
             }
         }