Feature: Per-group wagon removal flag.

src/autoreplace_cmd.cpp

@@ -741,6 +741,9 @@ CommandCost CmdAutoreplaceVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1
 	const Company *c = Company::Get(_current_company);
 	bool wagon_removal = c->settings.renew_keep_length;
 
+	const Group *g = Group::GetIfValid(v->group_id);
+	if (g != nullptr) wagon_removal = HasBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL);
+
 	/* Test whether any replacement is set, before issuing a whole lot of commands that would end in nothing changed */
 	Vehicle *w = v;
 	bool any_replacements = false;

src/autoreplace_gui.cpp

@@ -375,8 +375,15 @@ public:
 				break;
 
 			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: {
-				const Company *c = Company::Get(_local_company);
-				SetDParam(0, c->settings.renew_keep_length ? STR_CONFIG_SETTING_ON : STR_CONFIG_SETTING_OFF);
+				bool remove_wagon;
+				const Group *g = Group::GetIfValid(this->sel_group);
+				if (g != nullptr) {
+					remove_wagon = HasBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL);
+				} else {
+					const Company *c = Company::Get(_local_company);
+					remove_wagon = c->settings.renew_keep_length;
+				}
+				SetDParam(0, remove_wagon ? STR_CONFIG_SETTING_ON : STR_CONFIG_SETTING_OFF);
 				break;
 			}
 
@@ -528,9 +535,16 @@ public:
 				}
 				break;
 
-			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: // toggle renew_keep_length
-				DoCommandP(0, GetCompanySettingIndex("company.renew_keep_length"), Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1, CMD_CHANGE_COMPANY_SETTING);
+			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: {
+				const Group *g = Group::GetIfValid(this->sel_group);
+				if (g != nullptr) {
+					DoCommandP(0, this->sel_group | (GroupFlags::GF_REPLACE_WAGON_REMOVAL << 16), (HasBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL) ? 0 : 1) | (_ctrl_pressed << 1), CMD_SET_GROUP_FLAG);
+				} else {
+					// toggle renew_keep_length
+					DoCommandP(0, GetCompanySettingIndex("company.renew_keep_length"), Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1, CMD_CHANGE_COMPANY_SETTING);
+				}
 				break;
+			}
 
 			case WID_RV_START_REPLACE: { // Start replacing
 				if (this->GetWidget<NWidgetLeaf>(widget)->ButtonHit(pt)) {

src/group.h

@@ -63,7 +63,8 @@ struct GroupStatistics {
 };
 
 enum GroupFlags : uint8 {
-	GF_REPLACE_PROTECTION, ///< If set to true, the global autoreplace has no effect on the group
+	GF_REPLACE_PROTECTION,    ///< If set to true, the global autoreplace has no effect on the group
+	GF_REPLACE_WAGON_REMOVAL, ///< If set, autoreplace will perform wagon removal on vehicles in this group.
 	GF_END,
 };
 

src/group_cmd.cpp

@@ -315,7 +315,6 @@ CommandCost CmdCreateGroup(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 
 	if (flags & DC_EXEC) {
 		Group *g = new Group(_current_company);
-		ClrBit(g->flags, GroupFlags::GF_REPLACE_PROTECTION);
 		g->vehicle_type = vt;
 		g->parent = INVALID_GROUP;
 
@@ -323,10 +322,12 @@ CommandCost CmdCreateGroup(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 			const Company *c = Company::Get(_current_company);
 			g->livery.colour1 = c->livery[LS_DEFAULT].colour1;
 			g->livery.colour2 = c->livery[LS_DEFAULT].colour2;
+			if (c->settings.renew_keep_length) SetBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL);
 		} else {
 			g->parent = pg->index;
 			g->livery.colour1 = pg->livery.colour1;
 			g->livery.colour2 = pg->livery.colour2;
+			g->flags = pg->flags;
 		}
 
 		_new_group_id = g->index;

src/saveload/afterload.cpp

@@ -3127,6 +3127,23 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (IsSavegameVersionBefore(SLV_GROUP_REPLACE_WAGON_REMOVAL)) {
+		/* Propagate wagon removal flag for compatibility */
+		/* Temporary bitmask of company wagon removal setting */
+		uint16 wagon_removal = 0;
+		for (const Company *c : Company::Iterate()) {
+			if (c->settings.renew_keep_length) SetBit(wagon_removal, c->index);
+		}
+		for (Group *g : Group::Iterate()) {
+			if (g->flags != 0) {
+				/* Convert old replace_protection value to flag. */
+				g->flags = 0;
+				SetBit(g->flags, GroupFlags::GF_REPLACE_PROTECTION);
+			}
+			if (HasBit(wagon_removal, g->owner)) SetBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL);
+		}
+	}
+
 	/* Compute station catchment areas. This is needed here in case UpdateStationAcceptance is called below. */
 	Station::RecomputeCatchmentForAll();
 

src/saveload/saveload.h

@@ -325,6 +325,7 @@ enum SaveLoadVersion : uint16 {
 	SLV_VEH_MOTION_COUNTER,                 ///< 288  PR#8591 Desync safe motion counter
 	SLV_INDUSTRY_TEXT,                      ///< 289  PR#8576 v1.11.0-RC1  Additional GS text for industries.
 	SLV_MAPGEN_SETTINGS_REVAMP,             ///< 290  PR#8891 v1.11  Revamp of some mapgen settings (snow coverage, desert coverage, heightmap height, custom terrain type).
+	SLV_GROUP_REPLACE_WAGON_REMOVAL,        ///< 291  PR#7441 Per-group wagon removal flag.
 
 	SL_MAX_VERSION,                         ///< Highest possible saveload version
 };