SPIGOT-4527: Fix sponges with waterlogged blocks

nms-patches/BlockSponge.patch

@@ -46,12 +46,12 @@
                          ++i;
                          if (j < 6) {
                              linkedlist.add(new Tuple(blockposition2, j + 1));
-@@ -75,6 +82,31 @@
+@@ -75,6 +82,37 @@
                  break;
              }
          }
 +        // CraftBukkit start
-+        List<CraftBlockState> blocks = blockList.getList();
++        List<CraftBlockState> blocks = blockList.getList(); // Is a clone
 +        if (!blocks.isEmpty()) {
 +            final org.bukkit.block.Block bblock = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
 +
@@ -65,12 +65,18 @@
 +            for (CraftBlockState block : blocks) {
 +                BlockPosition blockposition2 = new BlockPosition(block.getX(), block.getY(), block.getZ());
 +                IBlockData iblockdata = world.getType(blockposition2);
++                Fluid fluid = world.getFluid(blockposition2);
 +                Material material = iblockdata.getMaterial();
 +
-+                if (material == Material.WATER_PLANT || material == Material.REPLACEABLE_WATER_PLANT) {
-+                    iblockdata.a(world, blockposition2, 0);
++                if (fluid.a(TagsFluid.WATER)) {
++                    if (iblockdata.getBlock() instanceof IFluidSource && ((IFluidSource) iblockdata.getBlock()).a(blockList, blockposition2, iblockdata) != FluidTypes.a) {
++                        // NOP
++                    } else if (iblockdata.getBlock() instanceof BlockFluids) {
++                        // NOP
++                    } else if (material == Material.WATER_PLANT || material == Material.REPLACEABLE_WATER_PLANT) {
++                        iblockdata.a(world, blockposition2, 0);
++                    }
 +                }
-+
 +                world.setTypeAndData(blockposition2, block.getHandle(), block.getFlag());
 +            }
 +        }