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345a6a6205
Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing CraftBukkit Changes: ef0946409 PR-1091: Fix exit position in entity travel with portals d12768f75 PR-1090: Remove no longer needed world reference from CraftMerchantCustom 7550f6854 SPIGOT-7115: Support hex color codes in custom merchant inventory titles
88 lines
4.3 KiB
Diff
88 lines
4.3 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/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index a8dd8cb390924a221e0be4ef4ef5e16868cc7682..a92a8e9d38cab33b2e161ef96e1cecd533b27324 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -1881,14 +1881,58 @@ public class ServerPlayer extends Player {
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}
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public void setCamera(@Nullable Entity entity) {
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+ // Paper start - Add PlayerStartSpectatingEntityEvent and PlayerStopSpectatingEntity Event and improve implementation
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Entity entity1 = this.getCamera();
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- this.camera = (Entity) (entity == null ? this : entity);
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- if (entity1 != this.camera) {
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- this.connection.send(new ClientboundSetCameraPacket(this.camera));
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- this.connection.teleport(this.camera.getX(), this.camera.getY(), this.camera.getZ(), this.getYRot(), this.getXRot(), TeleportCause.SPECTATE); // CraftBukkit
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+ if (entity == null) {
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+ entity = this;
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+ }
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+
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+ if (entity1 == entity) return; // new spec target is the current spec target
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+
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+ if (entity == 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(), entity.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 (entity != this) {
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+ if (entity.isRemoved() || !entity.valid || entity.level == null) {
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+ MinecraftServer.LOGGER.info("Blocking player " + this + " from spectating invalid entity " + entity);
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+ return;
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+ }
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+ if (this.isImmobile()) {
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+ // use debug: clients might maliciously spam this
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+ MinecraftServer.LOGGER.debug("Blocking frozen player " + this + " from spectating entity " + entity);
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+ return;
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+ }
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}
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+ this.camera = entity; // only set after validating state
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+
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+ if (entity != 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(entity.getCommandSenderWorld().getWorld(), entity.getX(), entity.getY(), entity.getZ(), this.getYRot(), this.getXRot()), 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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+ ChunkMap.TrackedEntity tracker = ((ServerLevel)entity.level).getChunkSource().chunkMap.entityMap.get(entity.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.connection.teleport(this.camera.getX(), this.camera.getY(), this.camera.getZ(), this.getYRot(), this.getXRot(), TeleportCause.SPECTATE); // CraftBukkit
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+ }
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+ this.connection.send(new ClientboundSetCameraPacket(entity));
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+ // Paper end
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}
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@Override
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