KFileItemModel: Allow to group files and folder together

When folders size is available and unless sort dir first is set, folders
and files can be grouped together in the regular size groups.

Without this you can end up with multiple groups being added each time a
folder size alternates with a file size.

Relates to d520b417c97bdbdfece2a497dac8b5384a80b597

1 files changed, 16 insertions, 8 deletions

diff --git a/src/kitemviews/kfileitemmodel.cpp b/src/kitemviews/kfileitemmodel.cpp
index a6c5e48ec..9441bc871 100644
--- a/src/kitemviews/kfileitemmodel.cpp
+++ b/src/kitemviews/kfileitemmodel.cpp
@@ -2026,16 +2026,24 @@ QList<QPair<int, QVariant> > KFileItemModel::sizeRoleGroups() const
         }
 
         const KFileItem& item = m_itemData.at(i)->item;
-        const KIO::filesize_t fileSize = !item.isNull() ? item.size() : ~0U;
+        KIO::filesize_t fileSize = !item.isNull() ? item.size() : ~0U;
         QString newGroupValue;
         if (!item.isNull() && item.isDir()) {
-            newGroupValue = i18nc("@title:group Size", "Folders");
-        } else if (fileSize < 5 * 1024 * 1024) {
-            newGroupValue = i18nc("@title:group Size", "Small");
-        } else if (fileSize < 10 * 1024 * 1024) {
-            newGroupValue = i18nc("@title:group Size", "Medium");
-        } else {
-            newGroupValue = i18nc("@title:group Size", "Big");
+            if (DetailsModeSettings::directorySizeCount() || m_sortDirsFirst) {
+                newGroupValue = i18nc("@title:group Size", "Folders");
+            } else {
+                fileSize = m_itemData.at(i)->values.value("size").toULongLong();
+            }
+        }
+
+        if (newGroupValue.isEmpty()) {
+            if (fileSize < 5 * 1024 * 1024) { // < 5 MB
+                newGroupValue = i18nc("@title:group Size", "Small");
+            } else if (fileSize < 10 * 1024 * 1024) { // < 10 MB
+                newGroupValue = i18nc("@title:group Size", "Medium");
+            } else {
+                newGroupValue = i18nc("@title:group Size", "Big");
+            }
         }
 
         if (newGroupValue != groupValue) {