102 Zeilen
5.8 KiB
Diff
102 Zeilen
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 273fd5a83790f76f089c2b1308a1e02ac6828683..d92cb1aca385ea15c181ba0dc8f19f317c995163 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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@@ -1683,15 +1683,59 @@ 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 e27d5b1e89b6e6f511e99e104b166503b267c5bc..49f8ceb913fe58c68cc6141ca49b0926785cd2f5 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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@@ -1208,6 +1208,7 @@ 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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