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
@@ -43,6 +43,11 @@
 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;
@@ -125,6 +130,11 @@
         BlockPosition blockposition = movingobjectpositionblock.getBlockPosition();
 
         if (!world.isClientSide && iprojectile.a(world, blockposition) && iprojectile instanceof EntityThrownTrident && iprojectile.getMot().f() > 0.6D) {
+            // CraftBukkit start
+            if (CraftEventFactory.callEntityChangeBlockEvent(iprojectile, blockposition, Blocks.AIR.getBlockData()).isCancelled()) {
+                return;
+            }
+            // CraftBukkit end
             world.b(blockposition, true);
         }
 
@@ -133,7 +143,9 @@
     @Override
     public void fallOn(World world, IBlockData iblockdata, BlockPosition blockposition, Entity entity, float f) {
         if (iblockdata.get(PointedDripstoneBlock.TIP_DIRECTION) == EnumDirection.UP && iblockdata.get(PointedDripstoneBlock.THICKNESS) == DripstoneThickness.TIP) {
+            CraftEventFactory.blockDamage = CraftBlock.at(world, blockposition); // CraftBukkit
             entity.a(f + 2.0F, 2.0F, DamageSource.STALAGMITE);
+            CraftEventFactory.blockDamage = null; // CraftBukkit
         } else {
             super.fallOn(world, iblockdata, blockposition, entity, f);
         }
@@ -397,15 +409,15 @@
         if (a(iblockdata, enumdirection.opposite())) {
             c(iblockdata, (GeneratorAccess) worldserver, blockposition1);
         } else if (iblockdata.isAir() || iblockdata.a(Blocks.WATER)) {
-            a((GeneratorAccess) worldserver, blockposition1, enumdirection, DripstoneThickness.TIP);
+            a((GeneratorAccess) worldserver, blockposition1, enumdirection, DripstoneThickness.TIP, blockposition); // CraftBukkit
         }
 
     }
 
-    private static void a(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, DripstoneThickness dripstonethickness) {
+    private static void a(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, DripstoneThickness dripstonethickness, BlockPosition source) {
         IBlockData iblockdata = (IBlockData) ((IBlockData) ((IBlockData) Blocks.POINTED_DRIPSTONE.getBlockData().set(PointedDripstoneBlock.TIP_DIRECTION, enumdirection)).set(PointedDripstoneBlock.THICKNESS, dripstonethickness)).set(PointedDripstoneBlock.WATERLOGGED, generatoraccess.getFluid(blockposition).getType() == FluidTypes.WATER);
 
-        generatoraccess.setTypeAndData(blockposition, iblockdata, 3);
+        org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(generatoraccess, source, blockposition, iblockdata, 3); // CraftBukkit
     }
 
     private static void c(IBlockData iblockdata, GeneratorAccess generatoraccess, BlockPosition blockposition) {
@@ -420,8 +432,8 @@
             blockposition1 = blockposition.down();
         }
 
-        a(generatoraccess, blockposition2, EnumDirection.DOWN, DripstoneThickness.TIP_MERGE);
-        a(generatoraccess, blockposition1, EnumDirection.UP, DripstoneThickness.TIP_MERGE);
+        a(generatoraccess, blockposition2, EnumDirection.DOWN, DripstoneThickness.TIP_MERGE, blockposition); // CraftBukkit
+        a(generatoraccess, blockposition1, EnumDirection.UP, DripstoneThickness.TIP_MERGE, blockposition); // CraftBukkit
     }
 
     public static void a(World world, BlockPosition blockposition, IBlockData iblockdata) {
@@ -454,7 +466,7 @@
 
             return (BlockPosition) a(generatoraccess, blockposition, enumdirection.e(), predicate, (iblockdata1) -> {
                 return a(iblockdata1, flag);
-            }, i).orElse((Object) null);
+            }, i).orElse(null); // CraftBukkit - decompile error
         }
     }
 
@@ -567,12 +579,12 @@
             return iblockdata.getBlock() instanceof AbstractCauldronBlock && ((AbstractCauldronBlock) iblockdata.getBlock()).a(fluidtype);
         };
 
-        return (BlockPosition) a(world, blockposition, EnumDirection.DOWN.e(), BlockBase.BlockData::isAir, predicate, 11).orElse((Object) null);
+        return (BlockPosition) a(world, blockposition, EnumDirection.DOWN.e(), BlockBase.BlockData::isAir, predicate, 11).orElse(null); // CraftBukkit - decompile error
     }
 
     @Nullable
     public static BlockPosition a(World world, BlockPosition blockposition) {
-        return (BlockPosition) a(world, blockposition, EnumDirection.UP.e(), BlockBase.BlockData::isAir, PointedDripstoneBlock::h, 11).orElse((Object) null);
+        return (BlockPosition) a(world, blockposition, EnumDirection.UP.e(), BlockBase.BlockData::isAir, PointedDripstoneBlock::h, 11).orElse(null); // CraftBukkit - decompile error
     }
 
     public static FluidType b(World world, BlockPosition blockposition) {