ExperienceOrbMergeEvent

Fired when the server is about to merge 2 experience orbs
Plugins can cancel this if they want to ensure experience orbs do not lose important
metadata such as spawn reason, or conditionally move data from source to target.

Spigot-API-Patches/0078-ExperienceOrbMergeEvent.patch

@@ -0,0 +1,100 @@
+From 1e771a4b19373d4a328f569bb97193d8aea8961c Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Tue, 19 Dec 2017 22:56:24 -0500
+Subject: [PATCH] ExperienceOrbMergeEvent
+
+Fired when the server is about to merge 2 experience orbs
+Plugins can cancel this if they want to ensure experience orbs do not lose important
+metadata such as spawn reason, or conditionally move data from source to target.
+
+diff --git a/src/main/java/com/destroystokyo/paper/event/entity/ExperienceOrbMergeEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/ExperienceOrbMergeEvent.java
+new file mode 100644
+index 00000000..fb5b4b86
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/event/entity/ExperienceOrbMergeEvent.java
+@@ -0,0 +1,82 @@
++/*
++ * Copyright (c) 2017 Daniel Ennis (Aikar) MIT License
++ *
++ *  Permission is hereby granted, free of charge, to any person obtaining
++ *  a copy of this software and associated documentation files (the
++ *  "Software"), to deal in the Software without restriction, including
++ *  without limitation the rights to use, copy, modify, merge, publish,
++ *  distribute, sublicense, and/or sell copies of the Software, and to
++ *  permit persons to whom the Software is furnished to do so, subject to
++ *  the following conditions:
++ *
++ *  The above copyright notice and this permission notice shall be
++ *  included in all copies or substantial portions of the Software.
++ *
++ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
++ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
++ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
++ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
++ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
++ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
++ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
++ */
++
++package com.destroystokyo.paper.event.entity;
++
++import org.bukkit.entity.ExperienceOrb;
++import org.bukkit.event.Cancellable;
++import org.bukkit.event.HandlerList;
++import org.bukkit.event.entity.EntityEvent;
++
++/**
++ * Fired anytime the server is about to merge 2 experience orbs into one
++ */
++public class ExperienceOrbMergeEvent extends EntityEvent implements Cancellable {
++    private final ExperienceOrb mergeTarget;
++    private final ExperienceOrb mergeSource;
++
++    public ExperienceOrbMergeEvent(ExperienceOrb mergeTarget, ExperienceOrb mergeSource) {
++        super(mergeTarget);
++        this.mergeTarget = mergeTarget;
++        this.mergeSource = mergeSource;
++    }
++
++    /**
++     * @return The orb that will absorb the other experience orb
++     */
++    public ExperienceOrb getMergeTarget() {
++        return mergeTarget;
++    }
++
++    /**
++     * @return The orb that is subject to being removed and merged into the target orb
++     */
++    public ExperienceOrb getMergeSource() {
++        return mergeSource;
++    }
++
++    private static final HandlerList handlers = new HandlerList();
++
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++
++    private boolean cancelled = false;
++
++    @Override
++    public boolean isCancelled() {
++        return cancelled;
++    }
++
++    /**
++     * @param cancel true if you wish to cancel this event, and prevent the orbs from merging
++     */
++    @Override
++    public void setCancelled(boolean cancel) {
++        cancelled = cancel;
++    }
++}
+-- 
+2.15.1
+

Spigot-Server-Patches/0258-ExperienceOrbMergeEvent.patch

@@ -0,0 +1,25 @@
+From 4756610ec863cc75f8e66891aaf6f0f2257afb23 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Tue, 19 Dec 2017 22:57:26 -0500
+Subject: [PATCH] ExperienceOrbMergeEvent
+
+Fired when the server is about to merge 2 experience orbs
+Plugins can cancel this if they want to ensure experience orbs do not lose important
+metadata such as spawn reason, or conditionally move data from source to target.
+
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index eb8a1c43c..ad927cbd5 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -1153,7 +1153,7 @@ public abstract class World implements IBlockAccess {
+                 for (Entity e : entities) {
+                     if (e instanceof EntityExperienceOrb) {
+                         EntityExperienceOrb loopItem = (EntityExperienceOrb) e;
+-                        if (!loopItem.dead && !(maxValue > 0 && loopItem.value >= maxValue)) { // Paper
++                        if (!loopItem.dead && !(maxValue > 0 && loopItem.value >= maxValue) && new com.destroystokyo.paper.event.entity.ExperienceOrbMergeEvent((org.bukkit.entity.ExperienceOrb) entity.getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) loopItem.getBukkitEntity()).callEvent()) { // Paper
+                             xp.value += loopItem.value;
+                             // Paper start
+                             if (!mergeUnconditionally && xp.value > maxValue) {
+-- 
+2.15.1
+