mirror of
https://github.com/PaperMC/Paper.git
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294 lines
10 KiB
Diff
294 lines
10 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Brokkonaut <hannos17@gmx.de>
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Date: Mon, 18 Jun 2018 15:40:39 +0200
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Subject: [PATCH] Add entity knockback events
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- EntityKnockbackEvent
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- EntityPushedByEntityAttackEvent
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- EntityKnockbackByEntityEvent
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Co-authored-by: aerulion <aerulion@gmail.com>
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Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
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diff --git a/src/main/java/com/destroystokyo/paper/event/entity/EntityKnockbackByEntityEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/EntityKnockbackByEntityEvent.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..beb1715e30ec476e3031c247285d0d3219e8a8ea
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/event/entity/EntityKnockbackByEntityEvent.java
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@@ -0,0 +1,51 @@
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+package com.destroystokyo.paper.event.entity;
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+
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+import io.papermc.paper.event.entity.EntityKnockbackEvent;
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+import io.papermc.paper.event.entity.EntityPushedByEntityAttackEvent;
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+import org.bukkit.entity.Entity;
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+import org.bukkit.entity.LivingEntity;
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+import org.bukkit.util.Vector;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.jetbrains.annotations.ApiStatus;
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+
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+/**
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+ * Fired when an Entity is knocked back by the hit of another Entity. The acceleration
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+ * vector can be modified. If this event is cancelled, the entity is not knocked back.
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+ */
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+public class EntityKnockbackByEntityEvent extends EntityPushedByEntityAttackEvent {
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+
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+ private final float knockbackStrength;
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+
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+ @ApiStatus.Internal
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+ public EntityKnockbackByEntityEvent(final @NonNull LivingEntity entity, final @NonNull Entity hitBy, final EntityKnockbackEvent.@NonNull Cause cause, final float knockbackStrength, final @NonNull Vector knockback) {
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+ super(entity, cause, hitBy, knockback);
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+ this.knockbackStrength = knockbackStrength;
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+ }
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+
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+ /**
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+ * @return the entity which was knocked back
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+ */
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+ @Override
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+ public @NonNull LivingEntity getEntity() {
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+ return (LivingEntity) super.getEntity();
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+ }
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+
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+ /**
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+ * @return the original knockback strength.
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+ * @apiNote this value doesn't necessarily relate to {@link #getKnockback()}.
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+ */
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+ @ApiStatus.Obsolete(since = "1.20.6")
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+ public float getKnockbackStrength() {
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+ return this.knockbackStrength;
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+ }
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+
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+ /**
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+ * Gets the causing entity. Same as {@link #getPushedBy()}.
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+ *
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+ * @return the Entity which hit
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+ */
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+ public @NonNull Entity getHitBy() {
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+ return super.getPushedBy();
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+ }
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+
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+}
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diff --git a/src/main/java/io/papermc/paper/event/entity/EntityKnockbackEvent.java b/src/main/java/io/papermc/paper/event/entity/EntityKnockbackEvent.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..8aaafa4ea837f54b32497010d121f02b103e03a6
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/event/entity/EntityKnockbackEvent.java
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@@ -0,0 +1,116 @@
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+package io.papermc.paper.event.entity;
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+
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+import com.google.common.base.Preconditions;
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+import org.bukkit.entity.Entity;
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+import org.bukkit.event.Cancellable;
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+import org.bukkit.event.HandlerList;
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+import org.bukkit.event.entity.EntityEvent;
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+import org.bukkit.util.Vector;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.jetbrains.annotations.ApiStatus;
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+
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+/**
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+ * Called when an entity receives knockback.
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+ * @see EntityPushedByEntityAttackEvent
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+ * @see com.destroystokyo.paper.event.entity.EntityKnockbackByEntityEvent
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+ */
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+public class EntityKnockbackEvent extends EntityEvent implements Cancellable {
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+
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+ private static final HandlerList HANDLER_LIST = new HandlerList();
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+
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+ private final Cause cause;
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+ protected Vector knockback;
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+ private boolean cancelled;
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+
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+ @ApiStatus.Internal
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+ public EntityKnockbackEvent(final @NonNull Entity entity, final EntityKnockbackEvent.@NonNull Cause cause, final @NonNull Vector knockback) {
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+ super(entity);
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+ this.cause = cause;
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+ this.knockback = knockback;
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+ }
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+
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+ /**
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+ * Gets the cause of the knockback.
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+ *
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+ * @return the cause of the knockback
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+ */
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+ public EntityKnockbackEvent.@NonNull Cause getCause() {
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+ return this.cause;
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+ }
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+
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+ /**
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+ * Gets the knockback force that will be applied to the entity. <br>
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+ * This value is read-only, changes made to it <b>will not</b> have any
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+ * effect on the final knockback received. Use {@link #setKnockback(Vector)}
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+ * to make changes.
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+ *
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+ * @return the knockback
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+ */
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+ public @NonNull Vector getKnockback() {
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+ return this.knockback.clone();
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+ }
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+
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+ /**
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+ * Sets the knockback force that will be applied to the entity.
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+ *
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+ * @param knockback the knockback
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+ */
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+ public void setKnockback(final @NonNull Vector knockback) {
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+ Preconditions.checkArgument(knockback != null, "knockback");
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+ this.knockback = knockback.clone();
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+ }
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+
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+ @Override
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+ public boolean isCancelled() {
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+ return this.cancelled;
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+ }
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+
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+ @Override
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+ public void setCancelled(final boolean cancel) {
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+ this.cancelled = cancel;
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+ }
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+
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+ @Override
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+ public @NonNull HandlerList getHandlers() {
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+ return HANDLER_LIST;
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+ }
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+
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+ public static @NonNull HandlerList getHandlerList() {
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+ return HANDLER_LIST;
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+ }
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+
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+ /**
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+ * An enum to specify the cause of the knockback.
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+ */
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+ public enum Cause {
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+
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+ /**
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+ * Knockback caused by non-entity damage.
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+ */
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+ DAMAGE,
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+ /**
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+ * Knockback caused by an attacking entity.
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+ */
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+ ENTITY_ATTACK,
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+ /**
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+ * Knockback caused by an explosion.
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+ */
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+ EXPLOSION,
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+ /**
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+ * Knockback caused by the target blocking with a shield.
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+ */
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+ SHIELD_BLOCK,
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+ /**
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+ * Knockback caused by a sweeping attack.
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+ */
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+ SWEEP_ATTACK,
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+ /**
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+ * A generic push.
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+ */
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+ PUSH,
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+ /**
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+ * Knockback with an unknown cause.
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+ */
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+ UNKNOWN
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+ }
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+}
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diff --git a/src/main/java/io/papermc/paper/event/entity/EntityPushedByEntityAttackEvent.java b/src/main/java/io/papermc/paper/event/entity/EntityPushedByEntityAttackEvent.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..b9d2a7a5bc4e67d8c36047da616046cbedce1d4a
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/event/entity/EntityPushedByEntityAttackEvent.java
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@@ -0,0 +1,66 @@
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+package io.papermc.paper.event.entity;
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+
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+import org.bukkit.entity.Entity;
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+import org.bukkit.event.Cancellable;
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+import org.bukkit.util.Vector;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.jetbrains.annotations.ApiStatus;
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+
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+/**
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+ * Fired when an entity is pushed by another entity's attack. The acceleration vector can be
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+ * modified. If this event is cancelled, the entity will not get pushed.
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+ * <p>
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+ * Note: Some entities might trigger this multiple times on the same entity
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+ * as multiple acceleration calculations are done.
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+ */
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+public class EntityPushedByEntityAttackEvent extends EntityKnockbackEvent implements Cancellable {
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+
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+ private final Entity pushedBy;
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+
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+ @ApiStatus.Internal
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+ public EntityPushedByEntityAttackEvent(final @NonNull Entity entity, final EntityKnockbackEvent.@NonNull Cause cause, final @NonNull Entity pushedBy, final @NonNull Vector knockback) {
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+ super(entity, cause, knockback);
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+ this.pushedBy = pushedBy;
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+ }
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+
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+ /**
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+ * Gets the entity which pushed the affected entity.
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+ *
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+ * @return the pushing entity
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+ */
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+ public @NonNull Entity getPushedBy() {
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+ return this.pushedBy;
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+ }
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+
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+ /**
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+ * Gets the acceleration that will be applied to the affected entity.
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+ *
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+ * @return the acceleration vector
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+ * @deprecated use {@link #getKnockback()}
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+ */
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+ @Deprecated(since = "1.20.6", forRemoval = true)
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+ public @NonNull Vector getAcceleration() {
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+ return this.knockback; // TODO Clone in 1.21 to not instantly break what was technically already modifiable (call super.getKnockback())
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+ }
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+
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+ /**
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+ * Sets the relative acceleration that will be applied to the affected entity.
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+ *
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+ * @param acceleration the new acceleration vector
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+ * @deprecated use {@link #setKnockback(Vector)}
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+ */
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+ @Deprecated(since = "1.20.6", forRemoval = true)
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+ public void setAcceleration(final @NonNull Vector acceleration) {
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+ super.setKnockback(acceleration);
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+ }
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+
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+ @Override
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+ public boolean isCancelled() {
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+ return super.isCancelled();
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+ }
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+
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+ @Override
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+ public void setCancelled(final boolean cancel) {
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+ super.setCancelled(cancel);
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+ }
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+}
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diff --git a/src/main/java/org/bukkit/event/entity/EntityKnockbackByEntityEvent.java b/src/main/java/org/bukkit/event/entity/EntityKnockbackByEntityEvent.java
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index 3f17290c0863cc1d452bb50c524c18b6ab255d70..bd44bc5ed9e20148f9b2ab3d2049187280f3eb18 100644
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--- a/src/main/java/org/bukkit/event/entity/EntityKnockbackByEntityEvent.java
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+++ b/src/main/java/org/bukkit/event/entity/EntityKnockbackByEntityEvent.java
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@@ -7,7 +7,10 @@ import org.jetbrains.annotations.NotNull;
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/**
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* Called when an entity receives knockback from another entity.
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+ *
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+ * @deprecated use {@link com.destroystokyo.paper.event.entity.EntityKnockbackByEntityEvent}
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*/
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+@Deprecated(forRemoval = true) // Paper
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public class EntityKnockbackByEntityEvent extends EntityKnockbackEvent {
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private final Entity source;
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diff --git a/src/main/java/org/bukkit/event/entity/EntityKnockbackEvent.java b/src/main/java/org/bukkit/event/entity/EntityKnockbackEvent.java
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index 9355efbbd4625e34d6c9d26bcbd02272202dec79..753e6f30da4f3dc9d5ed7d1b40d30b602b8c8c9e 100644
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--- a/src/main/java/org/bukkit/event/entity/EntityKnockbackEvent.java
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+++ b/src/main/java/org/bukkit/event/entity/EntityKnockbackEvent.java
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@@ -11,7 +11,10 @@ import org.jetbrains.annotations.NotNull;
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/**
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* Called when a living entity receives knockback.
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+ *
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+ * @deprecated use {@link io.papermc.paper.event.entity.EntityKnockbackEvent}
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*/
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+@Deprecated(forRemoval = true) // Paper
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public class EntityKnockbackEvent extends EntityEvent implements Cancellable {
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private static final HandlerList handlers = new HandlerList();
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