content: package net.minecraft.block;
  
  import net.minecraft.block.properties.IProperty;
  import net.minecraft.block.properties.PropertyDirection;
  import net.minecraft.block.state.BlockState;
  import net.minecraft.block.state.IBlockState;
  import net.minecraft.util.BlockPos;
  import net.minecraft.util.EnumFacing;
  import net.minecraft.world.IBlockAccess;
  import net.minecraft.world.World;
  
  public class BlockWallSign extends BlockSign {
      public static final PropertyDirection FACING = PropertyDirection.create("facing", EnumFacing.Plane.HORIZONTAL);
  
      public BlockWallSign() {
          this.setDefaultState(this.blockState.getBaseState().withProperty(FACING, EnumFacing.NORTH));
      }
  
      @SuppressWarnings("incomplete-switch")
      public void setBlockBoundsBasedOnState(IBlockAccess worldIn, BlockPos pos) {
          EnumFacing enumfacing = worldIn.getBlockState(pos).getValue(FACING);
          float f = 0.28125F;
          float f1 = 0.78125F;
          float f2 = 0.0F;
          float f3 = 1.0F;
          float f4 = 0.125F;
          this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
  
          switch (enumfacing) {
              case NORTH:
                  this.setBlockBounds(f2, f, 1.0F - f4, f3, f1, 1.0F);
                  break;
  
              case SOUTH:
                  this.setBlockBounds(f2, f, 0.0F, f3, f1, f4);
                  break;
  
              case WEST:
                  this.setBlockBounds(1.0F - f4, f, f2, 1.0F, f1, f3);
                  break;
  
              case EAST:
                  this.setBlockBounds(0.0F, f, f2, f4, f1, f3);
          }
      }
  
      public void onNeighborBlockChange(World worldIn, BlockPos pos, IBlockState state, Block neighborBlock) {
          EnumFacing enumfacing = state.getValue(FACING);
  
          if (!worldIn.getBlockState(pos.offset(enumfacing.getOpposite())).getBlock().getMaterial().isSolid()) {
              this.dropBlockAsItem(worldIn, pos, state, 0);
              worldIn.setBlockToAir(pos);
          }
  
          super.onNeighborBlockChange(worldIn, pos, state, neighborBlock);
      }
  
      public IBlockState getStateFromMeta(int meta) {
          EnumFacing enumfacing = EnumFacing.getFront(meta);
  
          if (enumfacing.getAxis() == EnumFacing.Axis.Y) {
              enumfacing = EnumFacing.NORTH;
          }
  
          return this.getDefaultState().withProperty(FACING, enumfacing);
      }
  
      public int getMetaFromState(IBlockState state) {
          return state.getValue(FACING).getIndex();
      }
  
      protected BlockState createBlockState() {
          return new BlockState(this, FACING);
      }
  }
  