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/EntityLiving.java b/src/main/java/net/minecraft/world/entity/EntityLiving.java
index 61dc6cdd4e692319d2a82646b92bf625d1a3f87d..21952ce66729946fb306fd15e9da4a3311551bec 100644
--- a/src/main/java/net/minecraft/world/entity/EntityLiving.java
+++ b/src/main/java/net/minecraft/world/entity/EntityLiving.java
@@ -2875,8 +2875,10 @@ public abstract class EntityLiving extends Entity {
             } else if (this.aQ() && (!this.onGround || d7 > d8)) {
                 this.c((Tag) TagsFluid.LAVA);
             } else if ((this.onGround || flag && d7 <= d8) && this.jumpTicks == 0) {
+                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
                 this.jump();
                 this.jumpTicks = 10;
+                } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
             }
         } else {
             this.jumpTicks = 0;
diff --git a/src/main/java/net/minecraft/world/entity/animal/EntityPanda.java b/src/main/java/net/minecraft/world/entity/animal/EntityPanda.java
index f755607872920caae1410d38c431c16b5238c00f..711b322007a0973ff0aebf3c25efbae8fc7741d0 100644
--- a/src/main/java/net/minecraft/world/entity/animal/EntityPanda.java
+++ b/src/main/java/net/minecraft/world/entity/animal/EntityPanda.java
@@ -490,7 +490,9 @@ public class EntityPanda extends EntityAnimal {
             EntityPanda entitypanda = (EntityPanda) iterator.next();
 
             if (!entitypanda.isBaby() && entitypanda.onGround && !entitypanda.isInWater() && entitypanda.fh()) {
+                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
                 entitypanda.jump();
+                } 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 aa08ca83a105627b7e257ac664c29d899b557e9e..f0fb9954c9fc7ccf31e3c4bc633ce48c85ba49dd 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -789,5 +789,20 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
     public boolean isHandRaised() {
         return getHandle().isHandRaised();
     }
+
+    @Override
+    public boolean isJumping() {
+        return getHandle().jumping;
+    }
+
+    @Override
+    public void setJumping(boolean jumping) {
+        getHandle().setJumping(jumping);
+        if (jumping && getHandle() instanceof EntityInsentient) {
+            // this is needed to actually make a mob jump
+            ((EntityInsentient) getHandle()).getControllerJump().jump();
+        }
+    }
+
     // Paper end
 }