Add support for different calendar systems, add secondary calendar

core/preferences/src/main/java/de/mm20/launcher2/preferences/LauncherSettingsData.kt

@@ -202,6 +202,16 @@ data class LauncherSettingsData internal constructor(
      */
     val localeTransliterator: String? = "",
 
+    /**
+     * The ICU id of the primary calendar. `null` to use the default.
+     */
+    val localePrimaryCalendar: String? = null,
+
+    /**
+     * The ICU id of the secondary calendar. `null` to disable.
+     */
+    val localeSecondaryCalendar: String? = null,
+
     val feedProviderPackage: String? = null
 
 

core/preferences/src/main/java/de/mm20/launcher2/preferences/ui/LocaleSettings.kt

@@ -35,4 +35,22 @@ class LocaleSettings internal constructor(
             it.copy(localeTransliterator = transliterator)
         }
     }
+
+    val primaryCalendar
+        get() = launcherDataStore.data.map { it.localePrimaryCalendar }
+
+    fun setPrimaryCalendar(primaryCalendar: String?) {
+        launcherDataStore.update {
+            it.copy(localePrimaryCalendar = primaryCalendar)
+        }
+    }
+
+    val secondaryCalendar
+        get() = launcherDataStore.data.map { it.localeSecondaryCalendar }
+
+    fun setSecondaryCalendar(secondaryCalendar: String?) {
+        launcherDataStore.update {
+            it.copy(localeSecondaryCalendar = secondaryCalendar)
+        }
+    }
 }