Paper/patches/server/0342-Entity-Jump-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Sat, 8 Feb 2020 23:26:11 -0600
Subject: [PATCH] Entity Jump API


diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index a897ed99e7a643244fbe6f0ba1afc1bc15bb8d8d..574f8db51202c6686e7703f3193d63a1a4fefb65 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3262,8 +3262,10 @@ public abstract class LivingEntity extends Entity implements Attackable {
             } else if (this.isInLava() && (!this.onGround() || d7 > d8)) {
                 this.jumpInLiquid(FluidTags.LAVA);
             } else if ((this.onGround() || flag && d7 <= d8) && this.noJumpDelay == 0) {
+                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
                 this.jumpFromGround();
                 this.noJumpDelay = 10;
+                } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
             }
         } else {
             this.noJumpDelay = 0;
diff --git a/src/main/java/net/minecraft/world/entity/animal/Panda.java b/src/main/java/net/minecraft/world/entity/animal/Panda.java
index f8a59afbe0f95a06e9ae6972fc664d0a0860c951..7f4ff9658b0eca2034333810fd2b199a3d186e72 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Panda.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Panda.java
@@ -521,7 +521,9 @@ public class Panda extends Animal {
             Panda entitypanda = (Panda) iterator.next();
 
             if (!entitypanda.isBaby() && entitypanda.onGround() && !entitypanda.isInWater() && entitypanda.canPerformAction()) {
+                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
                 entitypanda.jumpFromGround();
+                } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
             }
         }
 
diff --git a/src/main/java/net/minecraft/world/entity/monster/Ravager.java b/src/main/java/net/minecraft/world/entity/monster/Ravager.java
index 243397de3b0a843ec95c6b721d7fc654bfc78448..aad1fb5cf231b400dc8c192871aa4429536d53ee 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Ravager.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Ravager.java
@@ -176,7 +176,9 @@ public class Ravager extends Raider {
                 }
 
                 if (!flag && this.onGround()) {
+                    if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
                     this.jumpFromGround();
+                    } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
                 }
             }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index b19185c16f8fecbefef697017e8dcfd249306fe3..c5784574f584a5588020b16776f01faf6902cbe8 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -887,5 +887,19 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
     public org.bukkit.inventory.EquipmentSlot getHandRaised() {
         return getHandle().getUsedItemHand() == net.minecraft.world.InteractionHand.MAIN_HAND ? org.bukkit.inventory.EquipmentSlot.HAND : org.bukkit.inventory.EquipmentSlot.OFF_HAND;
     }
+
+    @Override
+    public boolean isJumping() {
+        return getHandle().jumping;
+    }
+
+    @Override
+    public void setJumping(boolean jumping) {
+        getHandle().setJumping(jumping);
+        if (jumping && getHandle() instanceof Mob) {
+            // this is needed to actually make a mob jump
+            ((Mob) getHandle()).getJumpControl().jump();
+        }
+    }
     // Paper end
 }