SpigotCore_Main/src/de/steamwar/command/SWCommandUtils.java

@@ -138,7 +138,7 @@ public class SWCommandUtils {
             }
 
             @Override
-            public List<String> tabCompletes(CommandSender commandSender, String s) {
+            public List<String> tabCompletes(CommandSender commandSender, String[] previous, String s) {
                 return tabCompleter.apply(commandSender, s);
             }
         };

SpigotCore_Main/src/de/steamwar/command/SubCommand.java

@@ -112,7 +112,7 @@ class SubCommand {
         }
         for (TypeMapper<?> argument : arguments) {
             String s = argsList.remove(0);
-            if (argsList.isEmpty()) return argument.tabCompletes(commandSender, s);
+            if (argsList.isEmpty()) return argument.tabCompletes(commandSender, Arrays.copyOf(args, args.length - 1), s);
             try {
                 if (argument.map(s) == null) {
                     return Collections.emptyList();
@@ -124,7 +124,7 @@ class SubCommand {
         if (varArgs && !argsList.isEmpty()) {
             while (!argsList.isEmpty()) {
                 String s = argsList.remove(0);
-                if (argsList.isEmpty()) return arguments[arguments.length - 1].tabCompletes(commandSender, s);
+                if (argsList.isEmpty()) return arguments[arguments.length - 1].tabCompletes(commandSender, Arrays.copyOf(args, args.length - 1), s);
                 try {
                     arguments[arguments.length - 1].map(s);
                 } catch (Exception e) {

SpigotCore_Main/src/de/steamwar/command/TypeMapper.java

@@ -26,5 +26,5 @@ import java.util.List;
 public interface TypeMapper<T> {
     T map(String s);
 
-    List<String> tabCompletes(CommandSender commandSender, String s);
+    List<String> tabCompletes(CommandSender commandSender, String[] previousArguments, String s);
 }