From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Thu, 28 Sep 2017 17:21:32 -0400
Subject: [PATCH] Add PlayerJumpEvent


diff --git a/src/main/java/com/destroystokyo/paper/event/player/PlayerJumpEvent.java b/src/main/java/com/destroystokyo/paper/event/player/PlayerJumpEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..1d07c3d6bf3b9283371ca45698178979113085fa
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerJumpEvent.java
@@ -0,0 +1,105 @@
+package com.destroystokyo.paper.event.player;
+
+import com.google.common.base.Preconditions;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Called when the server detects the player is jumping.
+ * <p>
+ * Added to avoid the overhead and special case logic that many plugins use
+ * when checking for jumps via {@link PlayerMoveEvent}, this event is fired whenever
+ * the server detects that the player is jumping.
+ */
+@NullMarked
+public class PlayerJumpEvent extends PlayerEvent implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final Location to;
+    private Location from;
+
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public PlayerJumpEvent(final Player player, final Location from, final Location to) {
+        super(player);
+        this.from = from;
+        this.to = to;
+    }
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * If a jump event is cancelled, the player will be moved or
+     * teleported back to the Location as defined by {@link #getFrom()}. This will not
+     * fire an event
+     *
+     * @return {@code true} if this event is cancelled
+     */
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * If a jump event is cancelled, the player will be moved or
+     * teleported back to the Location as defined by {@link #getFrom()}. This will not
+     * fire an event
+     *
+     * @param cancel {@code true} if you wish to cancel this event
+     */
+    @Override
+    public void setCancelled(final boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    /**
+     * Gets the location this player jumped from
+     *
+     * @return Location the player jumped from
+     */
+    public Location getFrom() {
+        return this.from;
+    }
+
+    /**
+     * Sets the location to mark as where the player jumped from
+     *
+     * @param from New location to mark as the players previous location
+     */
+    public void setFrom(final Location from) {
+        Preconditions.checkArgument(from != null, "Cannot use null from location!");
+        Preconditions.checkArgument(from.getWorld() != null, "Cannot use from location with null world!");
+        this.from = from;
+    }
+
+    /**
+     * Gets the location this player jumped to
+     * <p>
+     * This information is based on what the client sends, it typically
+     * has little relation to the arc of the jump at any given point.
+     *
+     * @return Location the player jumped to
+     */
+    public Location getTo() {
+        return this.to.clone();
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}