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Break redstone on top of trap doors early

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This logic hooks into the neighbour update which should be invoked
as a result of redstone powering the trap door.
This commit is contained in:
Spottedleaf 2023-05-01 18:32:30 -07:00
parent bcec5b11e6
commit 4f9575eed8
1 changed files with 40 additions and 0 deletions
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patches/server/0977-Break-redstone-on-top-of-trap-doors-early.patch Normal file
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 1 May 2023 18:31:26 -0700
Subject: [PATCH] Break redstone on top of trap doors early
This logic hooks into the neighbour update which should be invoked
as a result of redstone powering the trap door.
diff --git a/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java b/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java
index 89ae0fa000b5950f4c0d23b7e9f959989b9e9a84..29e43313ff6bd9b10cf6409e3519c0b2603b431e 100644
--- a/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java
@@ -125,7 +125,26 @@ public class TrapDoorBlock extends HorizontalDirectionalBlock implements SimpleW
flag1 = eventRedstone.getNewCurrent() > 0;
}
// CraftBukkit end
- if ((Boolean) state.getValue(TrapDoorBlock.OPEN) != flag1) {
+ boolean open = (Boolean) state.getValue(TrapDoorBlock.OPEN) != flag1; // Paper - break redstone on trapdoors early
+ // Paper start - break redstone on trapdoors early
+ // note: this must run before any state for this block/its neighborus are written to the world
+ // we allow the redstone event to fire so that plugins can block
+ if (flag1 && open) { // if we are now powered and it caused the trap door to open
+ // in this case, first check for the redstone on top first
+ BlockPos abovePos = pos.above();
+ BlockState above = world.getBlockState(abovePos);
+ if (above.getBlock() instanceof RedStoneWireBlock) {
+ world.setBlock(abovePos, Blocks.AIR.defaultBlockState(), Block.UPDATE_CLIENTS | Block.UPDATE_NEIGHBORS);
+ Block.popResource(world, abovePos, new net.minecraft.world.item.ItemStack(net.minecraft.world.item.Items.REDSTONE));
+ // now check that this didn't change our state
+ if (world.getBlockState(pos) != state) {
+ // our state was changed, so we cannot propagate this update
+ return;
+ }
+ }
+ }
+ // Paper end - break redstone on trapdoors early
+ if (open) { // Paper - break redstone on trapdoors early
state = (BlockState) state.setValue(TrapDoorBlock.OPEN, flag1);
this.playSound((Player) null, world, pos, flag1);
}