"<for [nationFilter]>" conditional added

core/src/com/unciv/models/ruleset/nation/Nation.kt

@@ -302,7 +302,9 @@ class Nation : RulesetObject() {
             "All" -> true
             name -> true
             "Major" -> isMajorCiv
+            // To be deprecated, replaced by "City-States"
             "CityState" -> isCityState
+            Constants.cityStates -> isCityState
             else -> uniques.contains(filter)
         }
     }

core/src/com/unciv/models/ruleset/unique/UniqueParameterType.kt

@@ -175,6 +175,21 @@ enum class UniqueParameterType(
         }
     },
 
+    /** Implemented by [Nation.matchesFilter][com.unciv.models.ruleset.Building.matchesFilter] */
+    NationFilter("nationFilter", Constants.cityStates) {
+        private val knownValues = setOf(Constants.cityStates, "Major", "All")
+
+        override fun getErrorSeverity(
+            parameterText: String,
+            ruleset: Ruleset
+        ): UniqueType.UniqueComplianceErrorSeverity? {
+            if (parameterText in knownValues) return null
+            if (ruleset.nations.containsKey(parameterText)) return null
+            if (ruleset.nations.values.any { it.hasUnique(parameterText) }) return null
+            return UniqueType.UniqueComplianceErrorSeverity.RulesetSpecific
+        }
+    },
+
     /** Implemented by [CityInfo.matchesFilter][com.unciv.logic.city.City.matchesFilter] */
     CityFilter("cityFilter", "in all cities", null, "City filters") {
         private val cityFilterStrings = setOf(

core/src/com/unciv/models/ruleset/unique/UniqueType.kt

@@ -628,6 +628,7 @@ enum class UniqueType(val text: String, vararg targets: UniqueTarget, val flags:
 
 
     /////// civ conditionals
+    ConditionalCivFilter("for [nationFilter]", UniqueTarget.Conditional),
     ConditionalWar("when at war", UniqueTarget.Conditional),
     ConditionalNotWar("when not at war", UniqueTarget.Conditional),
     ConditionalGoldenAge("during a Golden Age", UniqueTarget.Conditional),

core/src/com/unciv/ui/screens/cityscreen/SpecialistAllocationTable.kt

@@ -65,6 +65,7 @@ class SpecialistAllocationTable(val cityScreen: CityScreen) : Table(BaseScreen.s
             else Color.GRAY // unassigned
             val icon = ImageGetter.getSpecialistIcon(color)
             specialistIconTable.add(icon).size(30f)
+            if (i % 6 == 0) specialistIconTable.row()
         }
         return specialistIconTable
     }

docs/Modders/Unique-parameters.md

@@ -53,6 +53,16 @@ Allows to only activate a unique for certain buildings. Allowed options are:
     -   Provides that stat as a bonus for resources (e.g. +1 Food from every Wheat)
     -   Provides that stat per some amount of population (e.g. +1 Science for every 2 population [cityFilter])
 
+## nationFilter
+
+Allows filtering for specific nations.
+
+- `All`
+- `City-states`
+- `Major`
+- Nation name
+- Nation unique
+
 ## cityFilter
 
 cityFilters allow us to choose the range of cities affected by this unique: