1 files changed, 121 insertions, 0 deletions
diff --git a/patches/api/0278-additions-to-PlayerGameModeChangeEvent.patch b/patches/api/0278-additions-to-PlayerGameModeChangeEvent.patch
new file mode 100644
index 0000000000..b2e65ae490
--- /dev/null
+++ b/patches/api/0278-additions-to-PlayerGameModeChangeEvent.patch
@@ -0,0 +1,121 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <[email protected]>
+Date: Sat, 15 May 2021 10:04:50 -0700
+Subject: [PATCH] additions to PlayerGameModeChangeEvent
+
+
+diff --git a/src/main/java/org/bukkit/event/player/PlayerGameModeChangeEvent.java b/src/main/java/org/bukkit/event/player/PlayerGameModeChangeEvent.java
+index 4b96e0573c7ce32ad8c41124ee9ecab8359318a5..aee4a8b52c0d4abb655a4778575f0122acf19049 100644
+--- a/src/main/java/org/bukkit/event/player/PlayerGameModeChangeEvent.java
++++ b/src/main/java/org/bukkit/event/player/PlayerGameModeChangeEvent.java
+@@ -8,15 +8,32 @@ import org.jetbrains.annotations.NotNull;
+ 
+ /**
+  * Called when the GameMode of the player is changed.
++ * <p>
++ * <b>NOTE:</b> When {@link #getCause()} is {@link Cause#DEFAULT_GAMEMODE},
++ * the Player from {@link #getPlayer()} might not be fully online at
++ * the time this event is fired. Plugins should use {@link Player#isOnline()}
++ * to check before changing player state.
+  */
+ public class PlayerGameModeChangeEvent extends PlayerEvent implements Cancellable {
+     private static final HandlerList handlers = new HandlerList();
+     private boolean cancelled;
+     private final GameMode newGameMode;
++    // Paper start
++    private final Cause cause;
++    private net.kyori.adventure.text.Component cancelMessage;
+ 
++    @Deprecated // Paper end
+     public PlayerGameModeChangeEvent(@NotNull final Player player, @NotNull final GameMode newGameMode) {
++        // Paper start
++        this(player, newGameMode, Cause.UNKNOWN, null);
++    }
++
++    public PlayerGameModeChangeEvent(@NotNull final Player player, @NotNull final GameMode newGameMode, @NotNull Cause cause, @org.jetbrains.annotations.Nullable net.kyori.adventure.text.Component cancelMessage) {
++        // Paper end
+         super(player);
+         this.newGameMode = newGameMode;
++        this.cause = cause; // Paper
++        this.cancelMessage = cancelMessage; // Paper
+     }
+ 
+     @Override
+@@ -49,4 +66,77 @@ public class PlayerGameModeChangeEvent extends PlayerEvent implements Cancellabl
+     public static HandlerList getHandlerList() {
+         return handlers;
+     }
++    // Paper start
++    /**
++     * Gets the cause of this gamemode change.
++     *
++     * @return the cause
++     */
++    @NotNull
++    public Cause getCause() {
++        return cause;
++    }
++
++    /**
++     * <b>Only valid if the cause of the gamemode change was directly due to a command.</b>.
++     * Gets the message shown to the command user if the event is cancelled
++     * as a notification that a player's gamemode was not changed.
++     * <p>
++     * This returns {@code null} if the gamemode change was due to a plugin, or a
++     * player joining the game with a gamemode not equal to the server default gamemode
++     * and {@code force-gamemode} is set to true.
++     *
++     * @return the error message shown to the command user, null if not directly caused by a command
++     */
++    @org.jetbrains.annotations.Nullable
++    public net.kyori.adventure.text.Component cancelMessage() {
++        return cancelMessage;
++    }
++
++    /**
++     * Sets the message shown to the command user if the event was cancelled.
++     * <b>The message is only shown to cancelled events that are directly called by a command
++     * not by a plugin or a player joining with the wrong gamemode.</b>
++     *
++     * @param message the error message shown to the command user, null to show no message.
++     */
++    public void cancelMessage(@org.jetbrains.annotations.Nullable net.kyori.adventure.text.Component message) {
++        this.cancelMessage = message;
++    }
++
++    public enum Cause {
++
++        /**
++         * A plugin changed the player's gamemode with
++         * {@link Player#setGameMode(GameMode)}.
++         */
++        PLUGIN,
++
++        /**
++         * The {@code /gamemode} command was used.
++         */
++        COMMAND,
++
++        /**
++         * A player had their gamemode changed as a result of
++         * the {@code /defaultgamemode} command, or they joined
++         * with a gamemode that was not the default gamemode and
++         * {@code force-gamemode} in {@code server.properties} is set to true.
++         */
++        DEFAULT_GAMEMODE,
++
++        /**
++         * When the player dies in a hardcore world and has their gamemode
++         * changed to {@link GameMode#SPECTATOR}.
++         */
++        HARDCORE_DEATH,
++
++        /**
++         * This cause is only used if a plugin fired their own
++         * {@link PlayerGameModeChangeEvent} and did not include a
++         * cause. Can usually be ignored.
++         */
++        UNKNOWN,
++    }
++    // Paper end
+ }