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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 383a892a5c34ec5e8f7d102f5a9bec11ae193c0e..878dd05e0a67a2c6bf48eab7f2d58bbfaf53d2d7 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3218,8 +3218,10 @@ public abstract class LivingEntity extends Entity {
             } 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 dbcf70dacf99b61c0147b43edd6a374b31809733..9c07e3f5554b3b9cf2a2c4d9239a72342567d7f1 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Panda.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Panda.java
@@ -515,7 +515,9 @@ 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 f747aa85beab98fbecdbe15b188be6614478bac6..a0eee7dc73bd4a96d9a1aa9555093820c5f7c49c 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Ravager.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Ravager.java
@@ -177,7 +177,9 @@ 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 ebebbd2536b9641b5b01d0e3fc060f89861eecdb..9887c98e3bc1c940f787328bfa2f6fcc22cbce1f 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -829,5 +829,19 @@ 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
 }