From f531bdf527427587ebab5d6f8b4013fa4e9849cc 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 000000000..289a0d784
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerJumpEvent.java
@@ -0,0 +1,106 @@
+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.jetbrains.annotations.NotNull;
+
+/**
+ * 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 PlayerMoveEvent, this event is fired whenever
+ * the server detects that the player is jumping.
+ */
+public class PlayerJumpEvent extends PlayerEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
+    private boolean cancel = false;
+    @NotNull private Location from;
+    @NotNull private Location to;
+
+    public PlayerJumpEvent(@NotNull final Player player, @NotNull final Location from, @NotNull final Location to) {
+        super(player);
+        this.from = from;
+        this.to = to;
+    }
+
+    /**
+     * Gets the cancellation state of this event. A cancelled event will not
+     * be executed in the server, but will still pass to other plugins
+     * <p>
+     * If a jump event is cancelled, the player will be moved or
+     * teleported back to the Location as defined by getFrom(). This will not
+     * fire an event
+     *
+     * @return true if this event is cancelled
+     */
+    public boolean isCancelled() {
+        return cancel;
+    }
+
+    /**
+     * Sets the cancellation state of this event. A cancelled event will not
+     * be executed in the server, but will still pass to other plugins
+     * <p>
+     * If a jump event is cancelled, the player will be moved or
+     * teleported back to the Location as defined by getFrom(). This will not
+     * fire an event
+     *
+     * @param cancel true if you wish to cancel this event
+     */
+    public void setCancelled(boolean cancel) {
+        this.cancel = cancel;
+    }
+
+    /**
+     * Gets the location this player jumped from
+     *
+     * @return Location the player jumped from
+     */
+    @NotNull
+    public Location getFrom() {
+        return 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(@NotNull Location from) {
+        validateLocation(from);
+        this.from = from;
+    }
+
+    /**
+     * Gets the location this player jumped to
+     *
+     * 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
+     */
+    @NotNull
+    public Location getTo() {
+        return to;
+    }
+
+    private void validateLocation(Location loc) {
+        Preconditions.checkArgument(loc != null, "Cannot use null location!");
+        Preconditions.checkArgument(loc.getWorld() != null, "Cannot use location with null world!");
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}
-- 
2.21.0