PaperMC/paper-server/nms-patches/net/minecraft/world/level/block/PointedDripstoneBlock.patch

--- a/net/minecraft/world/level/block/PointedDripstoneBlock.java
+++ b/net/minecraft/world/level/block/PointedDripstoneBlock.java
@@ -44,6 +44,11 @@
 import net.minecraft.world.phys.shapes.VoxelShapeCollision;
 import net.minecraft.world.phys.shapes.VoxelShapes;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.block.CraftBlock;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+// CraftBukkit end
+
 public class PointedDripstoneBlock extends Block implements Fallable, IBlockWaterlogged {
 
     public static final BlockStateDirection TIP_DIRECTION = BlockProperties.VERTICAL_DIRECTION;
@@ -126,6 +131,11 @@
         BlockPosition blockposition = movingobjectpositionblock.getBlockPos();
 
         if (!world.isClientSide && iprojectile.mayInteract(world, blockposition) && iprojectile instanceof EntityThrownTrident && iprojectile.getDeltaMovement().length() > 0.6D) {
+            // CraftBukkit start
+            if (CraftEventFactory.callEntityChangeBlockEvent(iprojectile, blockposition, Blocks.AIR.defaultBlockState()).isCancelled()) {
+                return;
+            }
+            // CraftBukkit end
             world.destroyBlock(blockposition, true);
         }
 
@@ -134,7 +144,9 @@
     @Override
     public void fallOn(World world, IBlockData iblockdata, BlockPosition blockposition, Entity entity, float f) {
         if (iblockdata.getValue(PointedDripstoneBlock.TIP_DIRECTION) == EnumDirection.UP && iblockdata.getValue(PointedDripstoneBlock.THICKNESS) == DripstoneThickness.TIP) {
+            CraftEventFactory.blockDamage = CraftBlock.at(world, blockposition); // CraftBukkit
             entity.causeFallDamage(f + 2.0F, 2.0F, world.damageSources().stalagmite());
+            CraftEventFactory.blockDamage = null; // CraftBukkit
         } else {
             super.fallOn(world, iblockdata, blockposition, entity, f);
         }
@@ -389,15 +401,15 @@
         if (isUnmergedTipWithDirection(iblockdata, enumdirection.getOpposite())) {
             createMergedTips(iblockdata, worldserver, blockposition1);
         } else if (iblockdata.isAir() || iblockdata.is(Blocks.WATER)) {
-            createDripstone(worldserver, blockposition1, enumdirection, DripstoneThickness.TIP);
+            createDripstone(worldserver, blockposition1, enumdirection, DripstoneThickness.TIP, blockposition); // CraftBukkit
         }
 
     }
 
-    private static void createDripstone(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, DripstoneThickness dripstonethickness) {
+    private static void createDripstone(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, DripstoneThickness dripstonethickness, BlockPosition source) { // CraftBukkit
         IBlockData iblockdata = (IBlockData) ((IBlockData) ((IBlockData) Blocks.POINTED_DRIPSTONE.defaultBlockState().setValue(PointedDripstoneBlock.TIP_DIRECTION, enumdirection)).setValue(PointedDripstoneBlock.THICKNESS, dripstonethickness)).setValue(PointedDripstoneBlock.WATERLOGGED, generatoraccess.getFluidState(blockposition).getType() == FluidTypes.WATER);
 
-        generatoraccess.setBlock(blockposition, iblockdata, 3);
+        org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(generatoraccess, source, blockposition, iblockdata, 3); // CraftBukkit
     }
 
     private static void createMergedTips(IBlockData iblockdata, GeneratorAccess generatoraccess, BlockPosition blockposition) {
@@ -412,8 +424,8 @@
             blockposition1 = blockposition.below();
         }
 
-        createDripstone(generatoraccess, blockposition2, EnumDirection.DOWN, DripstoneThickness.TIP_MERGE);
-        createDripstone(generatoraccess, blockposition1, EnumDirection.UP, DripstoneThickness.TIP_MERGE);
+        createDripstone(generatoraccess, blockposition2, EnumDirection.DOWN, DripstoneThickness.TIP_MERGE, blockposition); // CraftBukkit
+        createDripstone(generatoraccess, blockposition1, EnumDirection.UP, DripstoneThickness.TIP_MERGE, blockposition); // CraftBukkit
     }
 
     public static void spawnDripParticle(World world, BlockPosition blockposition, IBlockData iblockdata) {
@@ -446,7 +458,7 @@
 
             return (BlockPosition) findBlockVertical(generatoraccess, blockposition, enumdirection.getAxisDirection(), bipredicate, (iblockdata1) -> {
                 return isTip(iblockdata1, flag);
-            }, i).orElse((Object) null);
+            }, i).orElse(null); // CraftBukkit - decompile error
         }
     }
 
@@ -562,7 +574,7 @@
             return canDripThrough(world, blockposition1, iblockdata);
         };
 
-        return (BlockPosition) findBlockVertical(world, blockposition, EnumDirection.DOWN.getAxisDirection(), bipredicate, predicate, 11).orElse((Object) null);
+        return (BlockPosition) findBlockVertical(world, blockposition, EnumDirection.DOWN.getAxisDirection(), bipredicate, predicate, 11).orElse(null); // CraftBukkit - decompile error
     }
 
     @Nullable
@@ -571,7 +583,7 @@
             return canDripThrough(world, blockposition1, iblockdata);
         };
 
-        return (BlockPosition) findBlockVertical(world, blockposition, EnumDirection.UP.getAxisDirection(), bipredicate, PointedDripstoneBlock::canDrip, 11).orElse((Object) null);
+        return (BlockPosition) findBlockVertical(world, blockposition, EnumDirection.UP.getAxisDirection(), bipredicate, PointedDripstoneBlock::canDrip, 11).orElse(null); // CraftBukkit - decompile error
     }
 
     public static FluidType getCauldronFillFluidType(WorldServer worldserver, BlockPosition blockposition) {