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PaperMC/paper-server/patches/sources/net/minecraft/world/entity/ExperienceOrb.java.patch
BillyGalbreath e91df097e9 ExperienceOrb merging/stacking API and fixes 
Adds an option for maximum exp value when merging orbs

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

Fixes an issue where the stacked count was not taking into account
for mending repairs and when merging with spigot's merge-on-spawn
logic

== AT ==
public net.minecraft.world.entity.ExperienceOrb count

Co-authored-by: Aikar <aikar@aikar.co>
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
2017-11-10 23:03:12 -05:00

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--- a/net/minecraft/world/entity/ExperienceOrb.java
+++ b/net/minecraft/world/entity/ExperienceOrb.java
@@ -24,6 +24,13 @@
import net.minecraft.world.level.entity.EntityTypeTest;
import net.minecraft.world.phys.AABB;
import net.minecraft.world.phys.Vec3;
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.EntityRemoveEvent;
+import org.bukkit.event.entity.EntityTargetLivingEntityEvent;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.player.PlayerExpCooldownChangeEvent;
+// CraftBukkit end
public class ExperienceOrb extends Entity {
@@ -37,9 +44,63 @@
public int value;
public int count;
private Player followingPlayer;
+ // Paper start
+ @javax.annotation.Nullable
+ public java.util.UUID sourceEntityId;
+ @javax.annotation.Nullable
+ public java.util.UUID triggerEntityId;
+ public org.bukkit.entity.ExperienceOrb.SpawnReason spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
+ private void loadPaperNBT(CompoundTag tag) {
+ if (!tag.contains("Paper.ExpData", net.minecraft.nbt.Tag.TAG_COMPOUND)) {
+ return;
+ }
+ CompoundTag comp = tag.getCompound("Paper.ExpData");
+ if (comp.hasUUID("source")) {
+ this.sourceEntityId = comp.getUUID("source");
+ }
+ if (comp.hasUUID("trigger")) {
+ this.triggerEntityId = comp.getUUID("trigger");
+ }
+ if (comp.contains("reason")) {
+ String reason = comp.getString("reason");
+ try {
+ this.spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.valueOf(reason);
+ } catch (Exception e) {
+ this.level().getCraftServer().getLogger().warning("Invalid spawnReason set for experience orb: " + e.getMessage() + " - " + reason);
+ }
+ }
+ }
+ private void savePaperNBT(CompoundTag tag) {
+ CompoundTag comp = new CompoundTag();
+ if (this.sourceEntityId != null) {
+ comp.putUUID("source", this.sourceEntityId);
+ }
+ if (this.triggerEntityId != null) {
+ comp.putUUID("trigger", triggerEntityId);
+ }
+ if (this.spawnReason != null && this.spawnReason != org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN) {
+ comp.putString("reason", this.spawnReason.name());
+ }
+ tag.put("Paper.ExpData", comp);
+ }
+
+ @io.papermc.paper.annotation.DoNotUse
+ @Deprecated
public ExperienceOrb(Level world, double x, double y, double z, int amount) {
+ this(world, x, y, z, amount, null, null);
+ }
+
+ public ExperienceOrb(Level world, double x, double y, double z, int amount, @javax.annotation.Nullable org.bukkit.entity.ExperienceOrb.SpawnReason reason, @javax.annotation.Nullable Entity triggerId) {
+ this(world, x, y, z, amount, reason, triggerId, null);
+ }
+
+ public ExperienceOrb(Level world, double x, double y, double z, int amount, @javax.annotation.Nullable org.bukkit.entity.ExperienceOrb.SpawnReason reason, @javax.annotation.Nullable Entity triggerId, @javax.annotation.Nullable Entity sourceId) {
this(EntityType.EXPERIENCE_ORB, world);
+ this.sourceEntityId = sourceId != null ? sourceId.getUUID() : null;
+ this.triggerEntityId = triggerId != null ? triggerId.getUUID() : null;
+ this.spawnReason = reason != null ? reason : org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
+ // Paper end
this.setPos(x, y, z);
this.setYRot((float) (this.random.nextDouble() * 360.0D));
this.setDeltaMovement((this.random.nextDouble() * 0.20000000298023224D - 0.10000000149011612D) * 2.0D, this.random.nextDouble() * 0.2D * 2.0D, (this.random.nextDouble() * 0.20000000298023224D - 0.10000000149011612D) * 2.0D);
@@ -68,6 +129,7 @@
@Override
public void tick() {
super.tick();
+ Player prevTarget = this.followingPlayer;// CraftBukkit - store old target
this.xo = this.getX();
this.yo = this.getY();
this.zo = this.getZ();
@@ -93,7 +155,22 @@
this.followingPlayer = null;
}
- if (this.followingPlayer != null) {
+ // CraftBukkit start
+ boolean cancelled = false;
+ if (this.followingPlayer != prevTarget) {
+ EntityTargetLivingEntityEvent event = CraftEventFactory.callEntityTargetLivingEvent(this, this.followingPlayer, (this.followingPlayer != null) ? EntityTargetEvent.TargetReason.CLOSEST_PLAYER : EntityTargetEvent.TargetReason.FORGOT_TARGET);
+ LivingEntity target = (event.getTarget() == null) ? null : ((org.bukkit.craftbukkit.entity.CraftLivingEntity) event.getTarget()).getHandle();
+ cancelled = event.isCancelled();
+
+ if (cancelled) {
+ this.followingPlayer = prevTarget;
+ } else {
+ this.followingPlayer = (target instanceof Player) ? (Player) target : null;
+ }
+ }
+
+ if (this.followingPlayer != null && !cancelled) {
+ // CraftBukkit end
Vec3 vec3d = new Vec3(this.followingPlayer.getX() - this.getX(), this.followingPlayer.getY() + (double) this.followingPlayer.getEyeHeight() / 2.0D - this.getY(), this.followingPlayer.getZ() - this.getZ());
double d0 = vec3d.lengthSqr();
@@ -121,7 +198,7 @@
++this.age;
if (this.age >= 6000) {
- this.discard();
+ this.discard(EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
}
}
@@ -150,18 +227,27 @@
}
public static void award(ServerLevel world, Vec3 pos, int amount) {
+ // Paper start - add reasons for orbs
+ award(world, pos, amount, null, null, null);
+ }
+ public static void award(ServerLevel world, Vec3 pos, int amount, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId) {
+ award(world, pos, amount, reason, triggerId, null);
+ }
+ public static void award(ServerLevel world, Vec3 pos, int amount, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId, Entity sourceId) {
+ // Paper end - add reasons for orbs
while (amount > 0) {
int j = ExperienceOrb.getExperienceValue(amount);
amount -= j;
if (!ExperienceOrb.tryMergeToExisting(world, pos, j)) {
- world.addFreshEntity(new ExperienceOrb(world, pos.x(), pos.y(), pos.z(), j));
+ world.addFreshEntity(new ExperienceOrb(world, pos.x(), pos.y(), pos.z(), j, reason, triggerId, sourceId)); // Paper - add reason
}
}
}
private static boolean tryMergeToExisting(ServerLevel world, Vec3 pos, int amount) {
+ // Paper - TODO some other event for this kind of merge
AABB axisalignedbb = AABB.ofSize(pos, 1.0D, 1.0D, 1.0D);
int j = world.getRandom().nextInt(40);
List<ExperienceOrb> list = world.getEntities(EntityTypeTest.forClass(ExperienceOrb.class), axisalignedbb, (entityexperienceorb) -> {
@@ -188,9 +274,14 @@
}
private void merge(ExperienceOrb other) {
+ // Paper start - call orb merge event
+ if (!new com.destroystokyo.paper.event.entity.ExperienceOrbMergeEvent((org.bukkit.entity.ExperienceOrb) this.getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) other.getBukkitEntity()).callEvent()) {
+ return;
+ }
+ // Paper end - call orb merge event
this.count += other.count;
this.age = Math.min(this.age, other.age);
- other.discard();
+ other.discard(EntityRemoveEvent.Cause.MERGE); // CraftBukkit - add Bukkit remove cause
}
private void setUnderwaterMovement() {
@@ -215,7 +306,7 @@
this.markHurt();
this.health = (int) ((float) this.health - amount);
if (this.health <= 0) {
- this.discard();
+ this.discard(EntityRemoveEvent.Cause.DEATH); // CraftBukkit - add Bukkit remove cause
}
return true;
@@ -226,33 +317,35 @@
public void addAdditionalSaveData(CompoundTag nbt) {
nbt.putShort("Health", (short) this.health);
nbt.putShort("Age", (short) this.age);
- nbt.putShort("Value", (short) this.value);
+ nbt.putInt("Value", this.value); // Paper - save as Integer
nbt.putInt("Count", this.count);
+ this.savePaperNBT(nbt); // Paper
}
@Override
public void readAdditionalSaveData(CompoundTag nbt) {
this.health = nbt.getShort("Health");
this.age = nbt.getShort("Age");
- this.value = nbt.getShort("Value");
+ this.value = nbt.getInt("Value"); // Paper - load as Integer
this.count = Math.max(nbt.getInt("Count"), 1);
+ this.loadPaperNBT(nbt); // Paper
}
@Override
public void playerTouch(Player player) {
if (player instanceof ServerPlayer entityplayer) {
- if (player.takeXpDelay == 0) {
- player.takeXpDelay = 2;
+ if (player.takeXpDelay == 0 && new com.destroystokyo.paper.event.player.PlayerPickupExperienceEvent(entityplayer.getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) this.getBukkitEntity()).callEvent()) { // Paper - PlayerPickupExperienceEvent
+ player.takeXpDelay = CraftEventFactory.callPlayerXpCooldownEvent(player, 2, PlayerExpCooldownChangeEvent.ChangeReason.PICKUP_ORB).getNewCooldown(); // CraftBukkit - entityhuman.takeXpDelay = 2;
player.take(this, 1);
int i = this.repairPlayerItems(entityplayer, this.value);
if (i > 0) {
- player.giveExperiencePoints(i);
+ player.giveExperiencePoints(CraftEventFactory.callPlayerExpChangeEvent(player, this).getAmount()); // CraftBukkit - this.value -> event.getAmount() // Paper - supply experience orb object
}
--this.count;
if (this.count == 0) {
- this.discard();
+ this.discard(EntityRemoveEvent.Cause.PICKUP); // CraftBukkit - add Bukkit remove cause
}
}
@@ -266,12 +359,20 @@
ItemStack itemstack = ((EnchantedItemInUse) optional.get()).itemStack();
int j = EnchantmentHelper.modifyDurabilityToRepairFromXp(player.serverLevel(), itemstack, amount);
int k = Math.min(j, itemstack.getDamageValue());
+ // CraftBukkit start
+ org.bukkit.event.player.PlayerItemMendEvent event = CraftEventFactory.callPlayerItemMendEvent(player, this, itemstack, optional.get().inSlot(), k);
+ k = event.getRepairAmount();
+ if (event.isCancelled()) {
+ return amount;
+ }
+ // CraftBukkit end
itemstack.setDamageValue(itemstack.getDamageValue() - k);
if (k > 0) {
int l = amount - k * amount / j;
if (l > 0) {
+ // this.value = l; // CraftBukkit - update exp value of orb for PlayerItemMendEvent calls // Paper - the value field should not be mutated here because it doesn't take "count" into account
return this.repairPlayerItems(player, l);
}
}
@@ -291,6 +392,24 @@
}
public static int getExperienceValue(int value) {
+ // CraftBukkit start
+ if (value > 162670129) return value - 100000;
+ if (value > 81335063) return 81335063;
+ if (value > 40667527) return 40667527;
+ if (value > 20333759) return 20333759;
+ if (value > 10166857) return 10166857;
+ if (value > 5083423) return 5083423;
+ if (value > 2541701) return 2541701;
+ if (value > 1270849) return 1270849;
+ if (value > 635413) return 635413;
+ if (value > 317701) return 317701;
+ if (value > 158849) return 158849;
+ if (value > 79423) return 79423;
+ if (value > 39709) return 39709;
+ if (value > 19853) return 19853;
+ if (value > 9923) return 9923;
+ if (value > 4957) return 4957;
+ // CraftBukkit end
return value >= 2477 ? 2477 : (value >= 1237 ? 1237 : (value >= 617 ? 617 : (value >= 307 ? 307 : (value >= 149 ? 149 : (value >= 73 ? 73 : (value >= 37 ? 37 : (value >= 17 ? 17 : (value >= 7 ? 7 : (value >= 3 ? 3 : 1)))))))));
}
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