3 files changed, 83 insertions, 3 deletions

diff --git a/src/views/dolphinview.cpp b/src/views/dolphinview.cpp
index 6bd2ad0c1..d147a87f6 100644
--- a/src/views/dolphinview.cpp
+++ b/src/views/dolphinview.cpp
@@ -487,6 +487,13 @@ void DolphinView::setSortRole(const QByteArray &role)
         ViewProperties props(viewPropertiesUrl());
         props.setSortRole(role);
 
+        const Qt::SortOrder preferredOrder = preferredSortOrder(role);
+        if (sortOrder() != preferredOrder) {
+            props.setSortOrder(preferredOrder);
+            KItemModelBase *model = m_container->controller()->model();
+            model->setSortOrder(preferredOrder);
+        }
+
         KItemModelBase *model = m_container->controller()->model();
         model->setSortRole(role);
 
@@ -1734,6 +1741,31 @@ QUrl DolphinView::openItemAsFolderUrl(const KFileItem &item, const bool browseTh
     return QUrl();
 }
 
+Qt::SortOrder DolphinView::defaultSortOrderForRole(const QByteArray &role)
+{
+    static const QSet<QByteArray> descendingRoles = {// Time-based roles
+                                                     "modificationtime",
+                                                     "creationtime",
+                                                     "accesstime",
+                                                     "deletiontime",
+                                                     "imageDateTime",
+                                                     "releaseYear",
+                                                     // Size/dimension roles
+                                                     "size",
+                                                     "width",
+                                                     "height",
+                                                     "pageCount",
+                                                     "wordCount",
+                                                     "lineCount",
+                                                     // Quality/Quantity roles
+                                                     "rating",
+                                                     "duration",
+                                                     "bitrate",
+                                                     "frameRate"};
+
+    return descendingRoles.contains(role) ? Qt::DescendingOrder : Qt::AscendingOrder;
+}
+
 void DolphinView::resetZoomLevel()
 {
     ViewModeSettings settings{m_mode};
@@ -1984,6 +2016,9 @@ void DolphinView::slotSortOrderChangedByHeader(Qt::SortOrder current, Qt::SortOr
     Q_UNUSED(previous)
     Q_ASSERT(m_model->sortOrder() == current);
 
+    const QByteArray currentRole = m_model->sortRole();
+    m_rolesSortOrder[currentRole] = current;
+
     ViewProperties props(viewPropertiesUrl());
     props.setSortOrder(current);
 
@@ -1998,6 +2033,13 @@ void DolphinView::slotSortRoleChangedByHeader(const QByteArray &current, const Q
     ViewProperties props(viewPropertiesUrl());
     props.setSortRole(current);
 
+    const Qt::SortOrder preferredOrder = preferredSortOrder(current);
+    if (m_model->sortOrder() != preferredOrder) {
+        props.setSortOrder(preferredOrder);
+        m_model->setSortOrder(preferredOrder);
+        Q_EMIT sortOrderChanged(preferredOrder);
+    }
+
     Q_EMIT sortRoleChanged(current);
 }
 
@@ -2561,4 +2603,18 @@ bool DolphinView::tryShowNameToolTip(QHelpEvent *event)
     return false;
 }
 
+Qt::SortOrder DolphinView::preferredSortOrder(const QByteArray &role) const
+{
+    if (m_rolesSortOrder.contains(role)) {
+        return m_rolesSortOrder.value(role);
+    } else {
+        return defaultSortOrderForRole(role);
+    }
+}
+
+void DolphinView::setPreferredSortOrder(const QByteArray &role, Qt::SortOrder order)
+{
+    m_rolesSortOrder[role] = order;
+}
+
 #include "moc_dolphinview.cpp"
diff --git a/src/views/dolphinview.h b/src/views/dolphinview.h
index f491b6dd5..7c077d292 100644
--- a/src/views/dolphinview.h
+++ b/src/views/dolphinview.h
@@ -234,6 +234,18 @@ public:
     QList<QByteArray> visibleRoles() const;
 
     /**
+     * Returns the preferred sort order for a given role, taking into account
+     * user preferences and default sort orders.
+     */
+    Qt::SortOrder preferredSortOrder(const QByteArray &role) const;
+
+    /**
+     * Sets the preferred sort order for a given role. This remembers user
+     * preferences when switching between different sort roles.
+     */
+    void setPreferredSortOrder(const QByteArray &role, Qt::SortOrder order);
+
+    /**
      * Refreshes the view to get synchronized with the settings (e.g. icons size,
      * font, ...).
      */
@@ -337,6 +349,13 @@ public:
     static QUrl openItemAsFolderUrl(const KFileItem &item, const bool browseThroughArchives = true);
 
     /**
+     * Set the default order for a given sort role.
+     * Time-based roles, size/dimension roles, and quality/quantity roles
+     * default to descending order. All other roles default to ascending order.
+     */
+    static Qt::SortOrder defaultSortOrderForRole(const QByteArray &role);
+
+    /**
      * Hides tooltip displayed over element.
      */
     void hideToolTip(const ToolTipManager::HideBehavior behavior = ToolTipManager::HideBehavior::Later);
@@ -988,6 +1007,9 @@ private:
     /// Used for selection mode. @see setSelectionMode()
     std::unique_ptr<QProxyStyle> m_proxyStyle;
 
+    /// Hash table of user-preferred sort orders for each role
+    QHash<QByteArray, Qt::SortOrder> m_rolesSortOrder;
+
     // For unit tests
     friend class TestBase;
     friend class DolphinDetailsViewTest;
diff --git a/src/views/dolphinviewactionhandler.cpp b/src/views/dolphinviewactionhandler.cpp
index e504fd831..de3facd14 100644
--- a/src/views/dolphinviewactionhandler.cpp
+++ b/src/views/dolphinviewactionhandler.cpp
@@ -594,6 +594,8 @@ void DolphinViewActionHandler::slotSortOrderChanged(Qt::SortOrder order)
     const bool sortDescending = (order == Qt::DescendingOrder);
     descending->setChecked(sortDescending);
     ascending->setChecked(!sortDescending);
+    const QByteArray currentRole = m_currentView->sortRole();
+    m_currentView->setPreferredSortOrder(currentRole, order);
 }
 
 void DolphinViewActionHandler::slotSortFoldersFirstChanged(bool foldersFirst)
@@ -723,13 +725,13 @@ void DolphinViewActionHandler::slotSortRoleChanged(const QByteArray &role)
     if (role == "text" || role == "type" || role == "extension" || role == "tags" || role == "comment") {
         descending->setText(i18nc("Sort descending", "Z-A"));
         ascending->setText(i18nc("Sort ascending", "A-Z"));
-    } else if (role == "size") {
+    } else if (role == "size" || role == "width" || role == "height" || role == "pageCount" || role == "wordCount" || role == "lineCount") {
         descending->setText(i18nc("Sort descending", "Largest First"));
         ascending->setText(i18nc("Sort ascending", "Smallest First"));
-    } else if (role == "modificationtime" || role == "creationtime" || role == "accesstime") {
+    } else if (role == "modificationtime" || role == "creationtime" || role == "accesstime" || role == "imageDateTime" || role == "releaseYear") {
         descending->setText(i18nc("Sort descending", "Newest First"));
         ascending->setText(i18nc("Sort ascending", "Oldest First"));
-    } else if (role == "rating") {
+    } else if (role == "rating" || role == "bitrate" || role == "frameRate") {
         descending->setText(i18nc("Sort descending", "Highest First"));
         ascending->setText(i18nc("Sort ascending", "Lowest First"));
     } else {