Migrate old custom view font config entries

4 files changed, 45 insertions, 3 deletions

diff --git a/src/dolphinmainwindow.cpp b/src/dolphinmainwindow.cpp
index e71790656..124ce4535 100644
--- a/src/dolphinmainwindow.cpp
+++ b/src/dolphinmainwindow.cpp
@@ -86,8 +86,10 @@
 
 namespace {
     // Used for GeneralSettings::version() to determine whether
-    // an updated version of Dolphin is running.
-    const int CurrentDolphinVersion = 201;
+    // an updated version of Dolphin is running, so as to migrate
+    // removed/renamed ...etc config entries; increment it in such
+    // cases
+    const int CurrentDolphinVersion = 202;
     // The maximum number of entries in the back/forward popup menu
     const int MaxNumberOfNavigationentries = 12;
     // The maximum number of "Activate Tab" shortcuts
diff --git a/src/settings/dolphin_generalsettings.kcfg b/src/settings/dolphin_generalsettings.kcfg
index 08f01d72c..b2460b11c 100644
--- a/src/settings/dolphin_generalsettings.kcfg
+++ b/src/settings/dolphin_generalsettings.kcfg
@@ -32,7 +32,7 @@
             <default>true</default>
         </entry>
         <entry name="Version" type="Int">
-            <label>Internal version of Dolphin, containing 3 digits for major, minor, bugfix</label>
+            <label>Internal config version of Dolphin, mainly Used to determine whether an updated version of Dolphin is running, so as to migrate config entries that were removed/renamed ...etc</label>
             <default>0</default>
         </entry>
         <entry name="ModifiedStartupSettings" type="Bool">
diff --git a/src/settings/viewmodes/viewmodesettings.cpp b/src/settings/viewmodes/viewmodesettings.cpp
index 73a91a272..37675df29 100644
--- a/src/settings/viewmodes/viewmodesettings.cpp
+++ b/src/settings/viewmodes/viewmodesettings.cpp
@@ -11,7 +11,43 @@
 #include "dolphin_detailsmodesettings.h"
 #include "dolphin_iconsmodesettings.h"
 
+#include "dolphin_generalsettings.h"
+
+ViewModeSettings::ViewModeSettings()
+{
+    auto removeEntries = [](KConfigGroup &group) {
+        group.deleteEntry("FontFamily");
+        group.deleteEntry("FontWeight");
+        group.deleteEntry("ItalicFont");
+    };
+
+    KSharedConfig::Ptr config = KSharedConfig::openConfig();
+    // Migrate old config entries
+    if (GeneralSettings::version() < 202) {
+        for (const char *groupName : {"CompactMode", "DetailsMode", "IconsMode"}) {
+            KConfigGroup group = config->group(groupName);
+            const QString family = group.readEntry("FontFamily", QString{});
+            if (family.isEmpty()) {
+                removeEntries(group);
+                continue;
+            }
+
+            QFont font;
+            font.setFamily(family);
+            font.setWeight(group.readEntry<int>("FontWeight", QFont::Normal));
+            font.setItalic(group.readEntry("ItalicFont", false));
+            removeEntries(group);
+
+            // Write the new config entry
+            group.writeEntry("ViewFont", font);
+        }
+
+        config->sync();
+    }
+}
+
 ViewModeSettings::ViewModeSettings(DolphinView::Mode mode)
+    : ViewModeSettings()
 {
     switch (mode) {
     case DolphinView::IconsView:    m_viewModeSettingsVariant = IconsModeSettings::self();   return;
@@ -23,6 +59,7 @@ ViewModeSettings::ViewModeSettings(DolphinView::Mode mode)
 }
 
 ViewModeSettings::ViewModeSettings(ViewSettingsTab::Mode mode)
+    : ViewModeSettings()
 {
     switch (mode) {
     case ViewSettingsTab::IconsMode:    m_viewModeSettingsVariant = IconsModeSettings::self();   return;
@@ -34,6 +71,7 @@ ViewModeSettings::ViewModeSettings(ViewSettingsTab::Mode mode)
 }
 
 ViewModeSettings::ViewModeSettings(KStandardItemListView::ItemLayout itemLayout)
+    : ViewModeSettings()
 {
     switch (itemLayout) {
     case KStandardItemListView::IconsLayout:    m_viewModeSettingsVariant = IconsModeSettings::self();   return;
diff --git a/src/settings/viewmodes/viewmodesettings.h b/src/settings/viewmodes/viewmodesettings.h
index 6d8b3afb6..e766c80e7 100644
--- a/src/settings/viewmodes/viewmodesettings.h
+++ b/src/settings/viewmodes/viewmodesettings.h
@@ -48,6 +48,8 @@ public:
     void save();
 
 private:
+    explicit ViewModeSettings();
+
     std::variant<IconsModeSettings *, CompactModeSettings *, DetailsModeSettings *> m_viewModeSettingsVariant;
 };