From c2b95f59a8f07e7833c57fb6c2fdd121571197be Mon Sep 17 00:00:00 2001
From: Joo200 <github@joo200.de>
Date: Tue, 22 Aug 2023 14:34:52 +0200
Subject: [PATCH] Paper only: Protect sign modifications as building

---
 .../bukkit/listener/EventAbstractionListener.java        | 9 +++++++++
 .../java/com/sk89q/worldguard/bukkit/util/Materials.java | 3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/listener/EventAbstractionListener.java b/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/listener/EventAbstractionListener.java
index d35483d4..3c7af776 100644
--- a/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/listener/EventAbstractionListener.java
+++ b/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/listener/EventAbstractionListener.java
@@ -47,6 +47,7 @@ import com.sk89q.worldguard.bukkit.util.Materials;
 import com.sk89q.worldguard.config.WorldConfiguration;
 import com.sk89q.worldguard.protection.flags.Flags;
 import io.papermc.lib.PaperLib;
+import io.papermc.paper.event.player.PlayerOpenSignEvent;
 import org.bukkit.Bukkit;
 import org.bukkit.Effect;
 import org.bukkit.GameMode;
@@ -1266,5 +1267,13 @@ public class EventAbstractionListener extends AbstractListener {
         public void onEntityTransform(EntityZapEvent event) {
             Events.fireToCancel(event, new DamageEntityEvent(event, create(event.getBolt()), event.getEntity()));
         }
+
+        @EventHandler(ignoreCancelled = true)
+        public void onSignOpen(PlayerOpenSignEvent event) {
+            if (event.getCause() == PlayerOpenSignEvent.Cause.INTERACT) {
+                // other cases are handled by other events
+                Events.fireToCancel(event, new UseBlockEvent(event, create(event.getPlayer()), event.getSign().getBlock()));
+            }
+        }
     }
 }
diff --git a/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java b/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java
index 1f87de9a..c99fa0a6 100644
--- a/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java
+++ b/worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java
@@ -1343,7 +1343,8 @@ public final class Materials {
             || type == Material.DRAGON_EGG
             || Tag.FLOWER_POTS.isTagged(type)
             || Tag.CANDLES.isTagged(type)
-            || Tag.CANDLE_CAKES.isTagged(type);
+            || Tag.CANDLE_CAKES.isTagged(type)
+            || Tag.ALL_SIGNS.isTagged(type);
     }
 
     /**