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40 lines
2.6 KiB
Diff
40 lines
2.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Mon, 1 May 2023 18:31:26 -0700
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Subject: [PATCH] Break redstone on top of trap doors early
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This logic hooks into the neighbour update which should be invoked
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as a result of redstone powering the trap door.
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diff --git a/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java b/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java
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index a7d52f2f9c324c5af979fc39b3662ebc880e36fb..872e52e13293a99d45f93d90d8fa7f6aa99d1f3a 100644
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--- a/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java
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+++ b/src/main/java/net/minecraft/world/level/block/TrapDoorBlock.java
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@@ -157,7 +157,26 @@ public class TrapDoorBlock extends HorizontalDirectionalBlock implements SimpleW
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flag1 = eventRedstone.getNewCurrent() > 0;
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}
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// CraftBukkit end
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- if ((Boolean) state.getValue(TrapDoorBlock.OPEN) != flag1) {
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+ // Paper start - break redstone on trapdoors early
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+ boolean open = (Boolean) state.getValue(TrapDoorBlock.OPEN) != flag1;
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+ // note: this must run before any state for this block/its neighborus are written to the world
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+ // we allow the redstone event to fire so that plugins can block
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+ if (flag1 && open) { // if we are now powered and it caused the trap door to open
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+ // in this case, first check for the redstone on top first
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+ BlockPos abovePos = pos.above();
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+ BlockState above = world.getBlockState(abovePos);
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+ if (above.getBlock() instanceof RedStoneWireBlock) {
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+ world.setBlock(abovePos, Blocks.AIR.defaultBlockState(), Block.UPDATE_CLIENTS | Block.UPDATE_NEIGHBORS);
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+ Block.popResource(world, abovePos, new net.minecraft.world.item.ItemStack(net.minecraft.world.item.Items.REDSTONE));
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+ // now check that this didn't change our state
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+ if (world.getBlockState(pos) != state) {
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+ // our state was changed, so we cannot propagate this update
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+ return;
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+ }
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+ }
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+ }
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+ if (open) {
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+ // Paper end - break redstone on trapdoors early
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state = (BlockState) state.setValue(TrapDoorBlock.OPEN, flag1);
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this.playSound((Player) null, world, pos, flag1);
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}
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