Paper/patches/server/0602-Add-critical-damage-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: dodison <kacpik@mapik.eu>
Date: Mon, 26 Jul 2021 17:32:36 +0200
Subject: [PATCH] Add critical damage API


diff --git a/src/main/java/net/minecraft/world/damagesource/DamageSource.java b/src/main/java/net/minecraft/world/damagesource/DamageSource.java
index 9b5af216d38ff4584d40586403bd92207b230dfa..533ea6cbb813c8d1dc2bb3f65fd94d4fa5dd591e 100644
--- a/src/main/java/net/minecraft/world/damagesource/DamageSource.java
+++ b/src/main/java/net/minecraft/world/damagesource/DamageSource.java
@@ -255,4 +255,18 @@ public class DamageSource {
     public Holder<DamageType> typeHolder() {
         return this.type;
     }
+
+    // Paper start - add critical damage API
+    private boolean critical;
+    public boolean isCritical() {
+        return this.critical;
+    }
+    public DamageSource critical() {
+        return this.critical(true);
+    }
+    public DamageSource critical(boolean critical) {
+        this.critical = critical;
+        return this;
+    }
+    // Paper end - add critical damage API
 }
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 56f7a753d2167504b6d91219093097323a9081c5..07afb966626d86b065e138959e9ffcac27a0d5d2 100644
--- a/src/main/java/net/minecraft/world/entity/player/Player.java
+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
@@ -1274,7 +1274,7 @@ public abstract class Player extends LivingEntity {
                         }
 
                         f += this.getItemInHand(InteractionHand.MAIN_HAND).getItem().getAttackDamageBonus(this, f);
-                        boolean flag2 = flag && this.fallDistance > 0.0F && !this.onGround() && !this.onClimbable() && !this.isInWater() && !this.hasEffect(MobEffects.BLINDNESS) && !this.isPassenger() && target instanceof LivingEntity && !this.isSprinting();
+                        boolean flag2 = flag && this.fallDistance > 0.0F && !this.onGround() && !this.onClimbable() && !this.isInWater() && !this.hasEffect(MobEffects.BLINDNESS) && !this.isPassenger() && target instanceof LivingEntity && !this.isSprinting(); // Paper - Add critical damage API; diff on change
 
                         flag2 = flag2 && !this.level().paperConfig().entities.behavior.disablePlayerCrits; // Paper - Toggleable player crits
                         if (flag2) {
@@ -1313,7 +1313,7 @@ public abstract class Player extends LivingEntity {
                         }
 
                         Vec3 vec3d = target.getDeltaMovement();
-                        boolean flag5 = target.hurt(this.damageSources().playerAttack(this), f);
+                        boolean flag5 = target.hurt(this.damageSources().playerAttack(this).critical(flag2), f); // Paper - add critical damage API
 
                         if (flag5) {
                             if (i > 0) {
@@ -1341,7 +1341,7 @@ public abstract class Player extends LivingEntity {
 
                                     if (entityliving != this && entityliving != target && !this.isAlliedTo((Entity) entityliving) && (!(entityliving instanceof ArmorStand) || !((ArmorStand) entityliving).isMarker()) && this.distanceToSqr((Entity) entityliving) < 9.0D) {
                                         // CraftBukkit start - Only apply knockback if the damage hits
-                                        if (entityliving.hurt(this.damageSources().playerAttack(this).sweep(), f4)) {
+                                        if (entityliving.hurt(this.damageSources().playerAttack(this).sweep().critical(flag2), f4)) { // Paper - add critical damage API
                                             entityliving.knockback(0.4000000059604645D, (double) Mth.sin(this.getYRot() * 0.017453292F), (double) (-Mth.cos(this.getYRot() * 0.017453292F)), this, io.papermc.paper.event.entity.EntityKnockbackEvent.Cause.SWEEP_ATTACK); // CraftBukkit // Paper - knockback events
                                         }
                                         // CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
index 49dc01532f9b60b3f594abca56b7d807fe6716d5..427e889f58c86f7649fc1b661d55277599b320c0 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
@@ -392,6 +392,7 @@ public abstract class AbstractArrow extends Projectile {
             }
         }
 
+        if (this.isCritArrow()) damagesource = damagesource.critical(); // Paper - add critical damage API
         boolean flag = entity.getType() == EntityType.ENDERMAN;
         int k = entity.getRemainingFireTicks();
 
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 3102324bfdaa82826eead1f40d24bf13553f6506..efc3808dde268f8325304f4bce8fb3bf399adafd 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1064,7 +1064,7 @@ public class CraftEventFactory {
                 return CraftEventFactory.callEntityDamageEvent(source.getDirectBlock(), source.getDirectBlockState(), entity, DamageCause.BLOCK_EXPLOSION, bukkitDamageSource, modifiers, modifierFunctions, cancelled);
             }
             DamageCause damageCause = (damager.getBukkitEntity() instanceof org.bukkit.entity.TNTPrimed) ? DamageCause.BLOCK_EXPLOSION : DamageCause.ENTITY_EXPLOSION;
-            return CraftEventFactory.callEntityDamageEvent(damager, entity, damageCause, bukkitDamageSource, modifiers, modifierFunctions, cancelled);
+            return CraftEventFactory.callEntityDamageEvent(damager, entity, damageCause, bukkitDamageSource, modifiers, modifierFunctions, cancelled, source.isCritical()); // Paper - add critical damage API
         } else if (damager != null || source.getDirectEntity() != null) {
             DamageCause cause = (source.isSweep()) ? DamageCause.ENTITY_SWEEP_ATTACK : DamageCause.ENTITY_ATTACK;
 
@@ -1090,7 +1090,7 @@ public class CraftEventFactory {
                 cause = DamageCause.MAGIC;
             }
 
-            return CraftEventFactory.callEntityDamageEvent(damager, entity, cause, bukkitDamageSource, modifiers, modifierFunctions, cancelled);
+            return CraftEventFactory.callEntityDamageEvent(damager, entity, cause, bukkitDamageSource, modifiers, modifierFunctions, cancelled, source.isCritical()); // Paper - add critical damage API
         } else if (source.is(DamageTypes.FELL_OUT_OF_WORLD)) {
             return CraftEventFactory.callEntityDamageEvent(source.getDirectBlock(), source.getDirectBlockState(), entity, DamageCause.VOID, bukkitDamageSource, modifiers, modifierFunctions, cancelled);
         } else if (source.is(DamageTypes.LAVA)) {
@@ -1148,13 +1148,13 @@ public class CraftEventFactory {
             cause = DamageCause.CUSTOM;
         }
 
-        return CraftEventFactory.callEntityDamageEvent((Entity) null, entity, cause, bukkitDamageSource, modifiers, modifierFunctions, cancelled);
+        return CraftEventFactory.callEntityDamageEvent((Entity) null, entity, cause, bukkitDamageSource, modifiers, modifierFunctions, cancelled, source.isCritical()); // Paper - add critical damage API
     }
 
-    private static EntityDamageEvent callEntityDamageEvent(Entity damager, Entity damagee, DamageCause cause, org.bukkit.damage.DamageSource bukkitDamageSource, Map<DamageModifier, Double> modifiers, Map<DamageModifier, Function<? super Double, Double>> modifierFunctions, boolean cancelled) {
+    private static EntityDamageEvent callEntityDamageEvent(Entity damager, Entity damagee, DamageCause cause, org.bukkit.damage.DamageSource bukkitDamageSource, Map<DamageModifier, Double> modifiers, Map<DamageModifier, Function<? super Double, Double>> modifierFunctions, boolean cancelled, boolean critical) { // Paper - add critical damage API
         EntityDamageEvent event;
         if (damager != null) {
-            event = new EntityDamageByEntityEvent(damager.getBukkitEntity(), damagee.getBukkitEntity(), cause, bukkitDamageSource, modifiers, modifierFunctions);
+            event = new EntityDamageByEntityEvent(damager.getBukkitEntity(), damagee.getBukkitEntity(), cause, bukkitDamageSource, modifiers, modifierFunctions, critical);
         } else {
             event = new EntityDamageEvent(damagee.getBukkitEntity(), cause, bukkitDamageSource, modifiers, modifierFunctions);
         }