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Fix duplicated BlockPistonRetractEvent call (#7111)

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Dieser Commit ist enthalten in:
Jake Potrebic 2021-12-22 10:02:31 -08:00
Ursprung c55715a1b4
Commit 9170234f9a
3 geänderte Dateien mit 85 neuen und 96 gelöschten Zeilen
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47
patches/server/Fire-BlockPistonRetractEvent-for-all-empty-pistons.patch
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@ -1,47 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <1254957+zachbr@users.noreply.github.com>
Date: Thu, 31 Jan 2019 16:33:36 -0500
Subject: [PATCH] Fire BlockPistonRetractEvent for all empty pistons
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.
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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 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
@@ -0,0 +0,0 @@ public class PistonBaseBlock extends DirectionalBlock {
}
// CraftBukkit start
- if (!this.isSticky) {
+ //if (!this.sticky) { // Paper - Prevents empty sticky pistons from firing retract - history behind is odd
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);
@@ -0,0 +0,0 @@ public class PistonBaseBlock extends DirectionalBlock {
if (event.isCancelled()) {
return;
}
- }
+ //} // Paper
// PAIL: checkME - what happened to setTypeAndData?
// CraftBukkit end
world.blockEvent(pos, this, b0, enumdirection.get3DDataValue());

85
patches/server/Fix-sticky-pistons-and-BlockPistonRetractEvent.patch Normale Datei
Datei anzeigen

@ -0,0 +1,85 @@
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 <1254957+zachbr@users.noreply.github.com>
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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 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
@@ -0,0 +0,0 @@ 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());
@@ -0,0 +0,0 @@ public class PistonBaseBlock extends DirectionalBlock {
BlockState iblockdata1 = (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, iblockdata1, 20);
world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata1, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - diff on change
world.blockUpdated(pos, iblockdata1.getBlock());
@@ -0,0 +0,0 @@ public class PistonBaseBlock extends DirectionalBlock {
if (type == 1 && !iblockdata2.isAir() && PistonBaseBlock.isPushable(iblockdata2, world, blockposition1, enumdirection.getOpposite(), false, enumdirection) && (iblockdata2.getPistonPushReaction() == PushReaction.NORMAL || iblockdata2.is(Blocks.PISTON) || iblockdata2.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);
}
}

49
patches/server/Move-BlockPistonRetractEvent-to-fix-duplication.patch
Datei anzeigen

@ -1,49 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Madeline Miller <mnmiller1@me.com>
Date: Sun, 22 Aug 2021 22:17:18 +1000
Subject: [PATCH] Move BlockPistonRetractEvent to fix duplication
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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 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
@@ -0,0 +0,0 @@ public class PistonBaseBlock extends DirectionalBlock {
}
// CraftBukkit start
- //if (!this.sticky) { // Paper - Prevents empty sticky pistons from firing retract - history behind is odd
- 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.sticky) { // Paper - Prevents empty sticky pistons from firing retract - history behind is odd - 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;
+ // }
//} // Paper
// PAIL: checkME - what happened to setTypeAndData?
// CraftBukkit end
@@ -0,0 +0,0 @@ public class PistonBaseBlock extends DirectionalBlock {
BlockState iblockdata1 = (BlockState) ((BlockState) Blocks.MOVING_PISTON.defaultBlockState().setValue(MovingPistonBlock.FACING, enumdirection)).setValue(MovingPistonBlock.TYPE, this.isSticky ? PistonType.STICKY : PistonType.DEFAULT);
+ // Paper - Move empty piston retract call to fix duplication
+ 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 false;
+ } // Paper
+
world.setBlock(pos, iblockdata1, 20);
world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata1, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - diff on change
world.blockUpdated(pos, iblockdata1.getBlock());