From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Bjarne Koll <lynxplay101@gmail.com>
Date: Sun, 11 Jun 2023 18:45:10 +0200
Subject: [PATCH] Fix sendSignChange0's usage of SignText

Minecraft 1.20 introduced the SignText class that holds onto the text of
a single side of a minecraft sign.
This type is immutable and any methods on it produce an updated, new
instance of the class rather than mutating the called upon instance.

Spigot does not respect this change as it does not re-assign the
constructed sign text to the instance nor does it feed back said
instance to the virtual sign block entity.

diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index c8ceaf9ba8e167db0138bbad134100d8717a326e..03bb444705916ffe0b9eb4b7496524dc3459ebe0 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -1027,11 +1027,14 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     private void sendSignChange0(Component[] components, Location loc, DyeColor dyeColor, boolean hasGlowingText) {
         SignBlockEntity sign = new SignBlockEntity(CraftLocation.toBlockPosition(loc), Blocks.OAK_SIGN.defaultBlockState());
         SignText text = sign.getFrontText();
-        text.setColor(net.minecraft.world.item.DyeColor.byId(dyeColor.getWoolData()));
-        text.setHasGlowingText(hasGlowingText);
+        // Paper start - fix sign change using immutable SignText type
+        text = text.setColor(net.minecraft.world.item.DyeColor.byId(dyeColor.getWoolData()));
+        text = text.setHasGlowingText(hasGlowingText);
         for (int i = 0; i < components.length; i++) {
-            text.setMessage(i, components[i]);
+            text = text.setMessage(i, components[i]);
         }
+        sign.setText(text, true);
+        // Paper end - fix sign change using immutable SignText type
 
         getHandle().connection.send(sign.getUpdatePacket());
         // Paper end