diff options
Diffstat (limited to 'patches/server/0646-Fix-sticky-pistons-and-BlockPistonRetractEvent.patch')
| -rw-r--r-- | patches/server/0646-Fix-sticky-pistons-and-BlockPistonRetractEvent.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/patches/server/0646-Fix-sticky-pistons-and-BlockPistonRetractEvent.patch b/patches/server/0646-Fix-sticky-pistons-and-BlockPistonRetractEvent.patch new file mode 100644 index 0000000000..2ee001a77a --- /dev/null +++ b/patches/server/0646-Fix-sticky-pistons-and-BlockPistonRetractEvent.patch @@ -0,0 +1,85 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Jake Potrebic <[email protected]> +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 <[email protected]> +Co-authored-by: Madeline Miller <[email protected]> + +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 2f2c9fb65d4cc8bd40303216e03c5c1956305ff4..e6bfbe2588e0c2a1be14e38d654e889d392ad4db 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 +@@ -160,15 +160,15 @@ 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 - Fix sticky pistons and BlockPistonRetractEvent; 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()); +@@ -245,6 +245,13 @@ 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 - Fix sticky pistons and BlockPistonRetractEvent; 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 - Fix sticky pistons and BlockPistonRetractEvent + world.setBlock(pos, iblockdata2, 20); + world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata2, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); + world.blockUpdated(pos, iblockdata2.getBlock()); +@@ -271,6 +278,13 @@ 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 - Fix sticky pistons and BlockPistonRetractEvent; 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 - Fix sticky pistons and BlockPistonRetractEvent + world.removeBlock(pos.relative(enumdirection), false); + } + } |