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Upstream has released updates that appears to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Bukkit Changes: f009c3dd SPIGOT-5810, SPIGOT-5835: 'Better' handling of Player.isOnGround e677c370 Update ECJ version 5058a35d SPIGOT-5860: Item.setItemStack should be NotNull CraftBukkit Changes:d77f4d9b
SPIGOT-5810, SPIGOT-5835: 'Better' handling of Player.isOnGround53c95627
SPIGOT-5865: Piglin does not trigger EntityPickupItemEvent2ab04d24
Update ECJ version7884e079
SPIGOT-5868: Blocks do not tick in custom nether / end2a848286
SPIGOT-5863: Don't check colour in scoreboard length validationf2cbce30
SPIGOT-5866: Beehive unknown TargetReason Spigot Changes: ad703da0 SPIGOT-5870: /plugins "website" field shows "version" 1a27cfd8 #98: Improve output of /plugins command using text components 732d5bab Disable checkstyle in Spigot blocks 0199a9a6 #97: Add Memory Usage to Ticks Per Second Command. 33ea98fc SPIGOT-5858: NPE: Joining the server with an invalid dimension
102 lines
5.8 KiB
Diff
102 lines
5.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Caleb Bassham <caleb.bassham@gmail.com>
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Date: Fri, 28 Sep 2018 02:32:19 -0500
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Subject: [PATCH] Call player spectator target events and improve
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implementation
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Use a proper teleport for teleporting to entities in different
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worlds.
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Implementation improvements authored by Spottedleaf <Spottedleaf@users.noreply.github.com>
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Validate that the target entity is valid and deny spectate
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requests from frozen players.
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Also, make sure the entity is spawned to the client before
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sending the camera packet. If the entity isn't spawned clientside
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when it receives the camera packet, then the client will not
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spectate the target entity.
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Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
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diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
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index 8719381d942789bf80f4b0394cec12e7394ce871..f64a83a6a9f8aaa0c1bbd6c2e3d0af28c06cbbd6 100644
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--- a/src/main/java/net/minecraft/server/EntityPlayer.java
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+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
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@@ -1696,15 +1696,59 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
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return (Entity) (this.spectatedEntity == null ? this : this.spectatedEntity);
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}
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- public void setSpectatorTarget(Entity entity) {
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+ public void setSpectatorTarget(Entity newSpectatorTarget) {
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+ // Paper start - Add PlayerStartSpectatingEntityEvent and PlayerStopSpectatingEntity Event and improve implementation
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Entity entity1 = this.getSpecatorTarget();
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- this.spectatedEntity = (Entity) (entity == null ? this : entity);
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- if (entity1 != this.spectatedEntity) {
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- this.playerConnection.sendPacket(new PacketPlayOutCamera(this.spectatedEntity));
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- this.playerConnection.a(this.spectatedEntity.locX(), this.spectatedEntity.locY(), this.spectatedEntity.locZ(), this.yaw, this.pitch, TeleportCause.SPECTATE); // CraftBukkit
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+ if (newSpectatorTarget == null) {
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+ newSpectatorTarget = this;
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}
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+ if (entity1 == newSpectatorTarget) return; // new spec target is the current spec target
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+
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+ if (newSpectatorTarget == this) {
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+ com.destroystokyo.paper.event.player.PlayerStopSpectatingEntityEvent playerStopSpectatingEntityEvent = new com.destroystokyo.paper.event.player.PlayerStopSpectatingEntityEvent(this.getBukkitEntity(), entity1.getBukkitEntity());
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+
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+ if (!playerStopSpectatingEntityEvent.callEvent()) {
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+ return;
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+ }
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+ } else {
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+ com.destroystokyo.paper.event.player.PlayerStartSpectatingEntityEvent playerStartSpectatingEntityEvent = new com.destroystokyo.paper.event.player.PlayerStartSpectatingEntityEvent(this.getBukkitEntity(), entity1.getBukkitEntity(), newSpectatorTarget.getBukkitEntity());
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+
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+ if (!playerStartSpectatingEntityEvent.callEvent()) {
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+ return;
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+ }
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+ }
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+ // Validate
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+ if (newSpectatorTarget != this) {
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+ if (newSpectatorTarget.dead || newSpectatorTarget.shouldBeRemoved || !newSpectatorTarget.valid || newSpectatorTarget.world == null) {
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+ MinecraftServer.LOGGER.info("Blocking player " + this.toString() + " from spectating invalid entity " + newSpectatorTarget.toString());
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+ return;
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+ }
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+ if (this.isFrozen()) {
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+ // use debug: clients might maliciously spam this
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+ MinecraftServer.LOGGER.debug("Blocking frozen player " + this.toString() + " from spectating entity " + newSpectatorTarget.toString());
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+ return;
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+ }
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+ }
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+
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+ this.spectatedEntity = newSpectatorTarget; // only set after validating state
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+
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+ if (newSpectatorTarget != this) {
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+ // Make sure we're in the right place
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+ this.ejectPassengers(); // teleport can fail if we have passengers...
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+ this.getBukkitEntity().teleport(new Location(newSpectatorTarget.getWorld().getWorld(), newSpectatorTarget.locX(), newSpectatorTarget.locY(), newSpectatorTarget.locZ(), this.yaw, this.pitch), TeleportCause.SPECTATE); // Correctly handle cross-world entities from api calls by using CB teleport
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+
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+ // Make sure we're tracking the entity before sending
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+ PlayerChunkMap.EntityTracker tracker = ((WorldServer)newSpectatorTarget.world).getChunkProvider().playerChunkMap.trackedEntities.get(newSpectatorTarget.getId());
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+ if (tracker != null) { // dumb plugins...
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+ tracker.updatePlayer(this);
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+ }
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+ } else {
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+ this.playerConnection.teleport(this.spectatedEntity.locX(), this.spectatedEntity.locY(), this.spectatedEntity.locZ(), this.yaw, this.pitch, TeleportCause.SPECTATE); // CraftBukkit
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+ }
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+ this.playerConnection.sendPacket(new PacketPlayOutCamera(newSpectatorTarget));
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+ // Paper end
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}
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@Override
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diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
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index 17247eb9c08de10da50b94d65ac3f05453805137..f0d8388d6ac0ed5546d34f628a6b2ba6c56b1c61 100644
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--- a/src/main/java/net/minecraft/server/PlayerConnection.java
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+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
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@@ -1133,6 +1133,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
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}
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// CraftBukkit start - Delegate to teleport(Location)
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+ public final void teleport(double d0, double d1, double d2, float f, float f1, PlayerTeleportEvent.TeleportCause cause) { this.a(d0, d1, d2, f, f1, cause); } // Paper - OBFHELPER
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public void a(double d0, double d1, double d2, float f, float f1, PlayerTeleportEvent.TeleportCause cause) {
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this.a(d0, d1, d2, f, f1, Collections.<PacketPlayOutPosition.EnumPlayerTeleportFlags>emptySet(), cause);
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}
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