Improve fullycopy pattern parsing

- Don't attempt ClipboardFormats#loadAllFromInput if the user is typing #copy or #clipboard to avoid needless "File dialogs are not supported in your environment." message

worldedit-core/src/main/java/com/fastasyncworldedit/core/extension/factory/parser/pattern/RandomFullClipboardPatternParser.java

@@ -18,6 +18,7 @@ import javax.annotation.Nonnull;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.stream.Stream;
 
 public class RandomFullClipboardPatternParser extends RichParser<Pattern> {
@@ -34,6 +35,16 @@ public class RandomFullClipboardPatternParser extends RichParser<Pattern> {
     @Override
     protected Stream<String> getSuggestions(String argumentInput, int index) {
         switch (index) {
+            case 0:
+                if (argumentInput.equals("#") || argumentInput.equals("#c")) {
+                    return Stream.of("#copy", "#clipboard");
+                } else if ("#copy".startsWith(argumentInput.toUpperCase(Locale.ROOT))) {
+                    return Stream.of("#copy");
+                } else if ("#clipboard".startsWith(argumentInput.toUpperCase(Locale.ROOT))) {
+                    return Stream.of("#clipboard");
+                } else {
+                    return Stream.empty();
+                }
             case 1:
             case 2:
                 return SuggestionHelper.suggestBoolean(argumentInput);
@@ -54,16 +65,14 @@ public class RandomFullClipboardPatternParser extends RichParser<Pattern> {
             boolean rotate = arguments.length >= 2 && Boolean.getBoolean(arguments[1]);
             boolean flip = arguments.length == 3 && Boolean.getBoolean(arguments[2]);
             List<ClipboardHolder> clipboards;
-            switch (arguments[0].toLowerCase()) {
+            if ("#copy".startsWith(arguments[0].toUpperCase(Locale.ROOT)) ||
-                case "#copy":
+                    "#clipboard".startsWith(arguments[0].toUpperCase(Locale.ROOT))) {
-                case "#clipboard":
                 ClipboardHolder clipboard = context.requireSession().getExistingClipboard();
                 if (clipboard == null) {
                     throw new InputParseException(Caption.of("fawe.error.parse.no-clipboard", getPrefix()));
                 }
                 clipboards = Collections.singletonList(clipboard);
-                    break;
+            } else {
-                default:
                 Actor player = context.requireActor();
                 MultiClipboardHolder multi = ClipboardFormats.loadAllFromInput(player,
                         arguments[0], ClipboardFormats.findByAlias("fast"), false
@@ -82,7 +91,6 @@ public class RandomFullClipboardPatternParser extends RichParser<Pattern> {
                     throw new InputParseException(Caption.of("fawe.error.parse.no-clipboard-source", arguments[0]));
                 }
                 clipboards = multi.getHolders();
-                    break;
             }
             return new RandomFullClipboardPattern(clipboards, rotate, flip);
         } catch (IOException e) {