Paper/patches/api/0251-EntityMoveEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Tue, 11 Feb 2020 21:56:38 -0600
Subject: [PATCH] EntityMoveEvent


diff --git a/src/main/java/io/papermc/paper/event/entity/EntityMoveEvent.java b/src/main/java/io/papermc/paper/event/entity/EntityMoveEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..46990a220f70b04218b14aec1e9efbd46c2ad77c
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/entity/EntityMoveEvent.java
@@ -0,0 +1,150 @@
+package io.papermc.paper.event.entity;
+
+import com.google.common.base.Preconditions;
+import org.bukkit.Location;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.entity.EntityEvent;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Holds information for living entity movement events
+ * <p>
+ * Does not fire for players; use {@link PlayerMoveEvent} for player movement.
+ */
+public class EntityMoveEvent extends EntityEvent implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private Location from;
+    private Location to;
+
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public EntityMoveEvent(@NotNull LivingEntity entity, @NotNull Location from, @NotNull Location to) {
+        super(entity);
+        this.from = from;
+        this.to = to;
+    }
+
+    @Override
+    @NotNull
+    public LivingEntity getEntity() {
+        return (LivingEntity) super.getEntity();
+    }
+
+    /**
+     * Gets the location this entity moved from
+     *
+     * @return Location the entity moved from
+     */
+    @NotNull
+    public Location getFrom() {
+        return this.from;
+    }
+
+    /**
+     * Sets the location to mark as where the entity moved from
+     *
+     * @param from New location to mark as the entity's previous location
+     */
+    public void setFrom(@NotNull Location from) {
+        validateLocation(from);
+        this.from = from;
+    }
+
+    /**
+     * Gets the location this entity moved to
+     *
+     * @return Location the entity moved to
+     */
+    @NotNull
+    public Location getTo() {
+        return this.to;
+    }
+
+    /**
+     * Sets the location that this entity will move to
+     *
+     * @param to New Location this entity will move to
+     */
+    public void setTo(@NotNull Location to) {
+        validateLocation(to);
+        this.to = to;
+    }
+
+    /**
+     * Check if the entity has changed position (even within the same block) in the event
+     *
+     * @return whether the entity has changed position or not
+     */
+    public boolean hasChangedPosition() {
+        return hasExplicitlyChangedPosition() || !this.from.getWorld().equals(this.to.getWorld());
+    }
+
+    /**
+     * Check if the entity has changed position (even within the same block) in the event, disregarding a possible world change
+     *
+     * @return whether the entity has changed position or not
+     */
+    public boolean hasExplicitlyChangedPosition() {
+        return this.from.getX() != this.to.getX() || this.from.getY() != this.to.getY() || this.from.getZ() != this.to.getZ();
+    }
+
+    /**
+     * Check if the entity has moved to a new block in the event
+     *
+     * @return whether the entity has moved to a new block or not
+     */
+    public boolean hasChangedBlock() {
+        return hasExplicitlyChangedBlock() || !from.getWorld().equals(to.getWorld());
+    }
+
+    /**
+     * Check if the entity has moved to a new block in the event, disregarding a possible world change
+     *
+     * @return whether the entity has moved to a new block or not
+     */
+    public boolean hasExplicitlyChangedBlock() {
+        return this.from.getBlockX() != this.to.getBlockX() || this.from.getBlockY() != this.to.getBlockY() || this.from.getBlockZ() != this.to.getBlockZ();
+    }
+
+    /**
+     * Check if the entity has changed orientation in the event
+     *
+     * @return whether the entity has changed orientation or not
+     */
+    public boolean hasChangedOrientation() {
+        return this.from.getPitch() != this.to.getPitch() || this.from.getYaw() != this.to.getYaw();
+    }
+
+    private void validateLocation(@NotNull Location loc) {
+        Preconditions.checkArgument(loc != null, "Cannot use null location!");
+        Preconditions.checkArgument(loc.getWorld() != null, "Cannot use null location with null world!");
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @Override
+    @NotNull
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}