PaperMC/patches/server/0925-Add-PlayerShieldDisableEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cryptite <cryptite@gmail.com>
Date: Mon, 1 May 2023 16:22:43 -0500
Subject: [PATCH] Add PlayerShieldDisableEvent

Called whenever a players shield is disabled. This is mainly caused by
attacking players or monsters that carry axes.

The event, while similar to the PlayerItemCooldownEvent, offers other
behaviour and can hence not be implemented as a childtype of said event.
Specifically, cancelling the event prevents the game events from being
sent to the player.

Plugins listening to just the PlayerItemCooldownEvent may not want said
sideeffects, meaning the disable event cannot share a handlerlist with
the cooldown event

diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
index bef9c905d884fec70f6faecff4d73c5484a412f5..e27fd3a1eb1a128613e328910f09f290007f48d5 100644
--- a/src/main/java/net/minecraft/world/entity/player/Player.java
+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
@@ -1004,7 +1004,7 @@ public abstract class Player extends LivingEntity {
     protected void blockUsingShield(LivingEntity attacker) {
         super.blockUsingShield(attacker);
         if (attacker.canDisableShield()) {
-            this.disableShield();
+            this.disableShield(attacker); // Paper - Add PlayerShieldDisableEvent
         }
 
     }
@@ -1495,8 +1495,21 @@ public abstract class Player extends LivingEntity {
         this.attack(target);
     }
 
+    @io.papermc.paper.annotation.DoNotUse @Deprecated // Paper - Add PlayerShieldDisableEvent
     public void disableShield() {
-        this.getCooldowns().addCooldown(Items.SHIELD, 100);
+        // Paper start - Add PlayerShieldDisableEvent
+        this.disableShield(null);
+    }
+    public void disableShield(@Nullable LivingEntity attacker) {
+        final org.bukkit.entity.Entity finalAttacker = attacker != null ? attacker.getBukkitEntity() : null;
+        if (finalAttacker != null) {
+            final io.papermc.paper.event.player.PlayerShieldDisableEvent shieldDisableEvent = new io.papermc.paper.event.player.PlayerShieldDisableEvent((org.bukkit.entity.Player) getBukkitEntity(), finalAttacker, 100);
+            if (!shieldDisableEvent.callEvent()) return;
+            this.getCooldowns().addCooldown(Items.SHIELD, shieldDisableEvent.getCooldown());
+        } else {
+            this.getCooldowns().addCooldown(Items.SHIELD, 100);
+        }
+        // Paper end - Add PlayerShieldDisableEvent
         this.stopUsingItem();
         this.level().broadcastEntityEvent(this, (byte) 30);
     }