Scissors/patches/server/0039-Limit-map-decorations.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Luna <lunahatesgogle@gmail.com>
Date: Fri, 28 Apr 2023 16:29:23 -0300
Subject: [PATCH] Limit map decorations


diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundMapItemDataPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundMapItemDataPacket.java
index 81f3e64d94fa17e45411e5c1641d9c5a2fe3d2e2..bcf6e2ce9f00d1688a5fa00ec055a57389346922 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundMapItemDataPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundMapItemDataPacket.java
@@ -65,7 +65,8 @@ public class ClientboundMapItemDataPacket implements Packet<ClientGamePacketList
                 b.writeByte(icon.x());
                 b.writeByte(icon.y());
                 b.writeByte(icon.rot() & 15);
-                b.writeNullable(icon.name(), FriendlyByteBuf::writeComponent);
+                final boolean passedNameCap = icon.name() == null || icon.name().getString().length() <= 32; // Scissors
+                b.writeNullable(passedNameCap ? icon.name() : null, FriendlyByteBuf::writeComponent); // Scissors
             });
         });
         if (this.colorPatch != null) {
diff --git a/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java b/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java
index e4c4948e076cd64686dfd16ae0568fafc1437140..eff53c21b18574750b691b784fb1688885d4ace7 100644
--- a/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java
+++ b/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java
@@ -361,6 +361,11 @@ public class MapItemSavedData extends SavedData {
     }
 
     private void addDecoration(MapDecoration.Type type, @Nullable LevelAccessor world, String key, double x, double z, double rotation, @Nullable Component text) {
+        // Scissors start - Limit decoration count
+        if (this.decorations.size() > 32) {
+            return;
+        }
+        // Scissors end
         int i = 1 << this.scale;
         float f = (float) (x - (double) this.centerX) / (float) i;
         float f1 = (float) (z - (double) this.centerZ) / (float) i;