Paper/patches/server/0607-Fix-setPatternColor-on-tropical-fish-bucket-meta.patch
Bjarne Koll d0dcd7d251
Fix incorrect invulnerability damage reduction (#11599)
Fixes incorrect spigot handling of the invulnerability damage
reduction applied when an already invulnerable entity is damaged with a
larger damage amount than the initial damage.
Vanilla still damages entities even if invulnerable if the damage to be
applied is larger than the previous damage taken. In that case, vanilla
applies the difference between the previous damage taken and the
proposed damage.

Spigot's damage modifier API takes over the computation of damage
reducing effects, however spigot invokes this handling with the initial
damage before computing the difference to the previous damage amount.
This leads to the reduction values to generally be larger than expected,
as they are computed on the not-yet-reduced value.
Spigot applies these reductions after calling the EntityDamageEvent and
*then* subtracts the previous damage point, leading to the final damage
amount being smaller than expected.

This patch cannot simply call the EntityDamageEvent with the reduced
damage, as that would lead to EntityDamageEvent#getDamage() returning
the already reduced damage, which breaks its method contract.
Instead, this patch makes use of the DamageModifier API, implementing
the last-damage-reduction as a DamageModifier.
2024-11-19 11:54:58 +01:00

73 lines
3.6 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Bjarne Koll <git@lynxplay.dev>
Date: Sat, 6 Nov 2021 23:15:20 +0100
Subject: [PATCH] Fix setPatternColor on tropical fish bucket meta
Prior to this commit, the tropical fish bucket meta would set the body
color to the previous metas pattern colour when updating the pattern
colour.
This commit hence simply fixes this by using the proper body colour
value when updating the pattern color.
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaTropicalFishBucket.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaTropicalFishBucket.java
index 8169d08c1bccf7c9896bb083eba388f918fac6c9..a514fe98d3d2b65d2cfd029079c69189bcb99c01 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaTropicalFishBucket.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaTropicalFishBucket.java
@@ -128,7 +128,7 @@ class CraftMetaTropicalFishBucket extends CraftMetaItem implements TropicalFishB
if (this.variant == null) {
this.variant = 0;
}
- this.variant = CraftTropicalFish.getData(color, this.getPatternColor(), this.getPattern());
+ this.variant = CraftTropicalFish.getData(color, this.getBodyColor(), this.getPattern()); // Paper - properly set tropical fish pattern color without mutating body color
}
@Override
diff --git a/src/test/java/io/papermc/paper/inventory/CraftMetaTropicalFishBucketTest.java b/src/test/java/io/papermc/paper/inventory/CraftMetaTropicalFishBucketTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..68a557cedbffb41f27ba21096e2ae5eebbf13f5c
--- /dev/null
+++ b/src/test/java/io/papermc/paper/inventory/CraftMetaTropicalFishBucketTest.java
@@ -0,0 +1,41 @@
+package io.papermc.paper.inventory;
+
+import org.bukkit.DyeColor;
+import org.bukkit.Material;
+import org.bukkit.entity.TropicalFish;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.TropicalFishBucketMeta;
+import org.bukkit.support.environment.AllFeatures;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+@AllFeatures
+public class CraftMetaTropicalFishBucketTest {
+
+ @Test
+ public void testAllCombinations() {
+ final var rawMeta = new ItemStack(Material.TROPICAL_FISH_BUCKET).getItemMeta();
+ Assertions.assertTrue(rawMeta instanceof TropicalFishBucketMeta, "Meta was not a tropical fish bucket");
+
+ final var meta = (TropicalFishBucketMeta) rawMeta;
+
+ for (final var bodyColor : DyeColor.values()) {
+ for (final var pattern : TropicalFish.Pattern.values()) {
+ for (final var patternColor : DyeColor.values()) {
+ meta.setBodyColor(bodyColor);
+ Assertions.assertEquals(bodyColor, meta.getBodyColor(), "Body color did not match post body color!");
+
+ meta.setPattern(pattern);
+ Assertions.assertEquals(pattern, meta.getPattern(), "Pattern did not match post pattern!");
+ Assertions.assertEquals(bodyColor, meta.getBodyColor(), "Body color did not match post pattern!");
+
+ meta.setPatternColor(patternColor);
+ Assertions.assertEquals(pattern, meta.getPattern(), "Pattern did not match post pattern color!");
+ Assertions.assertEquals(bodyColor, meta.getBodyColor(), "Body color did not match post pattern color!");
+ Assertions.assertEquals(patternColor, meta.getPatternColor(), "Pattern color did not match post pattern color!");
+ }
+ }
+ }
+ }
+
+}