Re-add PlayerGiveXpEvent & PlayerChangeLevelEvent (#6165)

patches/minecraft/net/minecraft/entity/player/PlayerEntity.java.patch

@@ -425,7 +425,29 @@
        }
     }
  
-@@ -1703,7 +1818,10 @@
+@@ -1462,6 +1577,10 @@
+    }
+ 
+    public void func_195068_e(int p_195068_1_) {
++      net.minecraftforge.event.entity.player.PlayerXpEvent.XpChange event = new net.minecraftforge.event.entity.player.PlayerXpEvent.XpChange(this, p_195068_1_);
++      if (net.minecraftforge.common.MinecraftForge.EVENT_BUS.post(event)) return;
++      p_195068_1_ = event.getAmount();
++      
+       this.func_85039_t(p_195068_1_);
+       this.field_71106_cc += (float)p_195068_1_ / (float)this.func_71050_bK();
+       this.field_71067_cb = MathHelper.func_76125_a(this.field_71067_cb + p_195068_1_, 0, Integer.MAX_VALUE);
+@@ -1501,6 +1620,10 @@
+    }
+ 
+    public void func_82242_a(int p_82242_1_) {
++      net.minecraftforge.event.entity.player.PlayerXpEvent.LevelChange event = new net.minecraftforge.event.entity.player.PlayerXpEvent.LevelChange(this, p_82242_1_);
++      if (net.minecraftforge.common.MinecraftForge.EVENT_BUS.post(event)) return;
++      p_82242_1_ = event.getLevels();
++      
+       this.field_71068_ca += p_82242_1_;
+       if (this.field_71068_ca < 0) {
+          this.field_71068_ca = 0;
+@@ -1703,7 +1826,10 @@
     }
  
     public ITextComponent func_145748_c_() {
@@ -437,7 +459,7 @@
        return this.func_208016_c(itextcomponent);
     }
  
-@@ -1939,4 +2057,44 @@
+@@ -1939,4 +2065,44 @@
           return this.field_221260_g;
        }
     }

src/main/java/net/minecraftforge/event/entity/player/PlayerPickupXpEvent.java

@@ -19,27 +19,21 @@
 
 package net.minecraftforge.event.entity.player;
 
-import net.minecraftforge.eventbus.api.Cancelable;
 import net.minecraft.entity.item.ExperienceOrbEntity;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraftforge.eventbus.api.Cancelable;
 
 /**
- * This event is called when a player collides with a EntityXPOrb on the ground.
- * The event can be canceled, and no further processing will be done.  
+ * Use {@link PlayerXpEvent.PickupXp}
  */
 @Cancelable
-public class PlayerPickupXpEvent extends PlayerEvent
+@Deprecated
+public class PlayerPickupXpEvent extends PlayerXpEvent.PickupXp
 {
-    private final ExperienceOrbEntity orb;
 
     public PlayerPickupXpEvent(PlayerEntity player, ExperienceOrbEntity orb)
     {
-        super(player);
-        this.orb = orb;
+        super(player, orb);
     }
 
-    public ExperienceOrbEntity getOrb()
-    {
-        return orb;
-    }
 }

src/main/java/net/minecraftforge/event/entity/player/PlayerXpEvent.java

@@ -0,0 +1,121 @@
+/*
+ * Minecraft Forge
+ * Copyright (c) 2016-2019.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.event.entity.player;
+
+import net.minecraft.entity.item.ExperienceOrbEntity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.eventbus.api.Cancelable;
+
+/**
+ * PlayerXpEvent is fired whenever an event involving player experience occurs. <br>
+ * If a method utilizes this {@link net.minecraftforge.eventbus.api.Event} as its parameter, the method will
+ * receive every child event of this class.<br>
+ * <br>
+ * All children of this event are fired on the {@link MinecraftForge#EVENT_BUS}.
+ */
+public class PlayerXpEvent extends PlayerEvent
+{
+
+    public PlayerXpEvent(PlayerEntity player)
+    {
+        super(player);
+    }
+
+    /**
+     * This event is fired after the player collides with an experience orb, but before the player has been given the experience.
+     * It can be cancelled, and no further processing will be done.
+     */
+    @Cancelable
+    public static class PickupXp extends PlayerXpEvent
+    {
+
+        private final ExperienceOrbEntity orb;
+
+        public PickupXp(PlayerEntity player, ExperienceOrbEntity orb)
+        {
+            super(player);
+            this.orb = orb;
+        }
+
+        public ExperienceOrbEntity getOrb()
+        {
+            return orb;
+        }
+
+    }
+
+    /**
+     * This event is fired when the player's experience changes through the {@link PlayerEntity#giveExperiencePoints} method.
+     * It can be cancelled, and no further processing will be done.
+     */
+    @Cancelable
+    public static class XpChange extends PlayerXpEvent
+    {
+
+        private int amount;
+
+        public XpChange(PlayerEntity player, int amount)
+        {
+            super(player);
+            this.amount = amount;
+        }
+
+        public int getAmount()
+        {
+            return this.amount;
+        }
+
+        public void setAmount(int amount)
+        {
+            this.amount = amount;
+        }
+
+    }
+
+    /**
+     * This event is fired when the player's experience level changes through the {@link PlayerEntity#addExperienceLevel} method.
+     * It can be cancelled, and no further processing will be done.
+     */
+    @Cancelable
+    public static class LevelChange extends PlayerXpEvent
+    {
+
+        private int levels;
+
+        public LevelChange(PlayerEntity player, int levels)
+        {
+            super(player);
+            this.levels = levels;
+        }
+
+        public int getLevels()
+        {
+            return this.levels;
+        }
+
+        public void setLevels(int levels)
+        {
+            this.levels = levels;
+        }
+
+    }
+
+}

src/test/java/net/minecraftforge/debug/entity/player/PlayerXpEventTest.java

@@ -0,0 +1,54 @@
+package net.minecraftforge.debug.entity.player;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import net.minecraftforge.event.entity.player.PlayerPickupXpEvent;
+import net.minecraftforge.event.entity.player.PlayerXpEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.common.Mod;
+
+@Mod("player_xp_event_test")
+@Mod.EventBusSubscriber()
+public class PlayerXpEventTest
+{
+
+    private static final boolean ENABLE = false;
+    private static Logger logger = LogManager.getLogger(PlayerXpEventTest.class);
+
+    @SubscribeEvent
+    public static void onPlayerXpEvent(PlayerXpEvent event)
+    {
+        if (!ENABLE) return;
+        logger.info("The PlayerXpEvent has been called!");
+    }
+
+    @SubscribeEvent
+    public static void onPlayerPickupXpOld(PlayerPickupXpEvent event)
+    {
+        if (!ENABLE) return;
+        logger.info("The deprecated PlayerPickupXpEvent has been called!");
+    }
+
+    @SubscribeEvent
+    public static void onPlayerPickupXp(PlayerXpEvent.PickupXp event)
+    {
+        if (!ENABLE) return;
+        logger.info("{} picked up an experience orb worth {}", event.getPlayer().getName().getString(), event.getOrb().getXpValue());
+    }
+
+    @SubscribeEvent
+    public static void onPlayerXpChange(PlayerXpEvent.XpChange event)
+    {
+        if (!ENABLE) return;
+        logger.info("{} has been given {} experience", event.getPlayer().getName().getString(), event.getAmount());
+    }
+
+    @SubscribeEvent
+    public static void onPlayerLevelChange(PlayerXpEvent.LevelChange event)
+    {
+        if (!ENABLE) return;
+        logger.info("{} has changed {} levels", event.getPlayer().getName().getString(), event.getLevels());
+    }
+
+}

src/test/resources/META-INF/mods.toml

@@ -53,5 +53,7 @@ loaderVersion="[28,)"
     modId="piston_event_test"
 [[mods]]
     modId="flower_pot_test"
+[[mods]]
+    modId="player_xp_event_test"
 [[mods]]
     modId="forgeblockstatesloader"