Paper/patches/server/0732-Fix-sticky-pistons-and-BlockPistonRetractEvent.patch
Jake Potrebic 7c2dc4b342
Use Codecs for adventure Component conversions & network serialization (#10014)
* finish implementing all adventure components in codecs

* add some initial tests

* Add round trip tests for text and translatable components

* Add more round trip test data (score component is failing)

* Add more round trip test data

* Fix SCORE_COMPONENT_MAP_CODEC

* Improve test failure messages

* Add failure cases

* Add a couple more test data

* Make use of AdventureCodecs

* Update patches after rebase

* Squash changes into adventure patch

* Fix AT formatting

* update comment

---------

Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
2023-12-11 22:02:06 -08:00

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5.3 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 22 Dec 2021 09:51:48 -0800
Subject: [PATCH] Fix sticky pistons and BlockPistonRetractEvent
There is an explicit check in the handling code for empty pistons that
prevents sticky pistons from firing the event. However when we look back
at the history we see that this check was originally added so that ONLY
sticky pistons would fire the retract event. I'm not sure why.
https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/commits/1092acbddf07edfa4100bc6824504ac75088e913
Over the course of several updates, the meaning of that field appears to
have changed from "is NOT sticky" to "is sticky". So now its having the
opposite effect. Only normal pistons fire the retraction event. And like
all things in CB, it's just been carried around since.
If we are to believe the history, the correct fix for this issue is to
flip it so it only fires for sticky pistons, but that puts us in a
bind. It's already firing for non-sticky pistons, changing it now would
likely result in breakage. Furthermore, there is little documentation as
to WHY that was ever intended to be the case.
Instead we opt to remove the check entirely so that the event fires for
all piston types.
Co-authored-by: Zach Brown <zach@zachbr.io>
Co-authored-by: Madeline Miller <mnmiller1@me.com>
diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
index cda90023ad662e8875365eac98ec69f476dcb42d..b9025fcc6a4db9533cdc42034c9e77323d0785fa 100644
--- a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
@@ -159,15 +159,15 @@ public class PistonBaseBlock extends DirectionalBlock {
}
// CraftBukkit start
- if (!this.isSticky) {
- org.bukkit.block.Block block = world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
- BlockPistonRetractEvent event = new BlockPistonRetractEvent(block, ImmutableList.<org.bukkit.block.Block>of(), CraftBlock.notchToBlockFace(enumdirection));
- world.getCraftServer().getPluginManager().callEvent(event);
-
- if (event.isCancelled()) {
- return;
- }
- }
+ // if (!this.isSticky) { // Paper - Move further down
+ // org.bukkit.block.Block block = world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
+ // BlockPistonRetractEvent event = new BlockPistonRetractEvent(block, ImmutableList.<org.bukkit.block.Block>of(), CraftBlock.notchToBlockFace(enumdirection));
+ // world.getCraftServer().getPluginManager().callEvent(event);
+ //
+ // if (event.isCancelled()) {
+ // return;
+ // }
+ // }
// PAIL: checkME - what happened to setTypeAndData?
// CraftBukkit end
world.blockEvent(pos, this, b0, enumdirection.get3DDataValue());
@@ -250,6 +250,13 @@ public class PistonBaseBlock extends DirectionalBlock {
BlockState iblockdata2 = (BlockState) ((BlockState) Blocks.MOVING_PISTON.defaultBlockState().setValue(MovingPistonBlock.FACING, enumdirection)).setValue(MovingPistonBlock.TYPE, this.isSticky ? PistonType.STICKY : PistonType.DEFAULT);
+ // Paper start - Move empty piston retract call to fix multiple event fires
+ if (!this.isSticky) {
+ if (!new BlockPistonRetractEvent(CraftBlock.at(world, pos), java.util.Collections.emptyList(), CraftBlock.notchToBlockFace(enumdirection)).callEvent()) {
+ return false;
+ }
+ }
+ // Paper end
world.setBlock(pos, iblockdata2, 20);
world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata2, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - diff on change
world.blockUpdated(pos, iblockdata2.getBlock());
@@ -276,6 +283,13 @@ public class PistonBaseBlock extends DirectionalBlock {
if (type == 1 && !iblockdata3.isAir() && PistonBaseBlock.isPushable(iblockdata3, world, blockposition1, enumdirection.getOpposite(), false, enumdirection) && (iblockdata3.getPistonPushReaction() == PushReaction.NORMAL || iblockdata3.is(Blocks.PISTON) || iblockdata3.is(Blocks.STICKY_PISTON))) {
this.moveBlocks(world, pos, enumdirection, false);
} else {
+ // Paper start - fire BlockPistonRetractEvent for sticky pistons retracting nothing (air)
+ if (type == TRIGGER_CONTRACT && iblockdata2.isAir()) {
+ if (!new BlockPistonRetractEvent(CraftBlock.at(world, pos), java.util.Collections.emptyList(), CraftBlock.notchToBlockFace(enumdirection)).callEvent()) {
+ return false;
+ }
+ }
+ // Paper end
world.removeBlock(pos.relative(enumdirection), false);
}
}