content: package net.minecraft.entity.item;
  
  import com.google.common.collect.Lists;
  import net.minecraft.block.Block;
  import net.minecraft.block.BlockAnvil;
  import net.minecraft.block.BlockFalling;
  import net.minecraft.block.ITileEntityProvider;
  import net.minecraft.block.material.Material;
  import net.minecraft.block.state.IBlockState;
  import net.minecraft.crash.CrashReportCategory;
  import net.minecraft.entity.Entity;
  import net.minecraft.init.Blocks;
  import net.minecraft.item.ItemStack;
  import net.minecraft.nbt.NBTBase;
  import net.minecraft.nbt.NBTTagCompound;
  import net.minecraft.tileentity.TileEntity;
  import net.minecraft.util.*;
  import net.minecraft.world.World;
  
  import java.util.List;
  
  public class EntityFallingBlock extends Entity {
      private IBlockState fallTile;
      public int fallTime;
      public boolean shouldDropItem = true;
      private boolean canSetAsBlock;
      private boolean hurtEntities;
      private int fallHurtMax = 40;
      private float fallHurtAmount = 2.0F;
      public NBTTagCompound tileEntityData;
  
      public EntityFallingBlock(World worldIn) {
          super(worldIn);
      }
  
      public EntityFallingBlock(World worldIn, double x, double y, double z, IBlockState fallingBlockState) {
          super(worldIn);
          this.fallTile = fallingBlockState;
          this.preventEntitySpawning = true;
          this.setSize(0.98F, 0.98F);
          this.setPosition(x, y, z);
          this.motionX = 0.0D;
          this.motionY = 0.0D;
          this.motionZ = 0.0D;
          this.prevPosX = x;
          this.prevPosY = y;
          this.prevPosZ = z;
      }
  
      protected boolean canTriggerWalking() {
          return false;
      }
  
      protected void entityInit() {
      }
  
      public boolean canBeCollidedWith() {
          return !this.isDead;
      }
  
      public void onUpdate() {
          Block block = this.fallTile.getBlock();
  
          if (block.getMaterial() == Material.air) {
              this.setDead();
          } else {
              this.prevPosX = this.posX;
              this.prevPosY = this.posY;
              this.prevPosZ = this.posZ;
  
              if (this.fallTime++ == 0) {
                  BlockPos blockpos = new BlockPos(this);
  
                  if (this.worldObj.getBlockState(blockpos).getBlock() == block) {
                      this.worldObj.setBlockToAir(blockpos);
                  } else if (!this.worldObj.isRemote) {
                      this.setDead();
                      return;
                  }
              }
  
              this.motionY -= 0.03999999910593033D;
              this.moveEntity(this.motionX, this.motionY, this.motionZ);
              this.motionX *= 0.9800000190734863D;
              this.motionY *= 0.9800000190734863D;
              this.motionZ *= 0.9800000190734863D;
  
              if (!this.worldObj.isRemote) {
                  BlockPos blockpos1 = new BlockPos(this);
  
                  if (this.onGround) {
                      this.motionX *= 0.699999988079071D;
                      this.motionZ *= 0.699999988079071D;
                      this.motionY *= -0.5D;
  
                      if (this.worldObj.getBlockState(blockpos1).getBlock() != Blocks.piston_extension) {
                          this.setDead();
  
                          if (!this.canSetAsBlock) {
                              if (this.worldObj.canBlockBePlaced(block, blockpos1, true, EnumFacing.UP, null, null) && !BlockFalling.canFallInto(this.worldObj, blockpos1.down()) && this.worldObj.setBlockState(blockpos1, this.fallTile, 3)) {
                                  if (block instanceof BlockFalling) {
                                      ((BlockFalling) block).onEndFalling(this.worldObj, blockpos1);
                                  }
  
                                  if (this.tileEntityData != null && block instanceof ITileEntityProvider) {
                                      TileEntity tileentity = this.worldObj.getTileEntity(blockpos1);
  
                                      if (tileentity != null) {
                                          NBTTagCompound nbttagcompound = new NBTTagCompound();
                                          tileentity.writeToNBT(nbttagcompound);
  
                                          for (String s : this.tileEntityData.getKeySet()) {
                                              NBTBase nbtbase = this.tileEntityData.getTag(s);
  
                                              if (!s.equals("x") && !s.equals("y") && !s.equals("z")) {
                                                  nbttagcompound.setTag(s, nbtbase.copy());
                                              }
                                          }
  
                                          tileentity.readFromNBT(nbttagcompound);
                                          tileentity.markDirty();
                                      }
                                  }
                              } else if (this.shouldDropItem && this.worldObj.getGameRules().getBoolean("doEntityDrops")) {
                                  this.entityDropItem(new ItemStack(block, 1, block.damageDropped(this.fallTile)), 0.0F);
                              }
                          }
                      }
                  } else if (this.fallTime > 100 && !this.worldObj.isRemote && (blockpos1.getY() < 1 || blockpos1.getY() > 256) || this.fallTime > 600) {
                      if (this.shouldDropItem && this.worldObj.getGameRules().getBoolean("doEntityDrops")) {
                          this.entityDropItem(new ItemStack(block, 1, block.damageDropped(this.fallTile)), 0.0F);
                      }
  
                      this.setDead();
                  }
              }
          }
      }
  
      public void fall(float distance, float damageMultiplier) {
          Block block = this.fallTile.getBlock();
  
          if (this.hurtEntities) {
              int i = MathHelper.ceiling_float_int(distance - 1.0F);
  
              if (i > 0) {
                  List<Entity> list = Lists.newArrayList(this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.getEntityBoundingBox()));
                  boolean flag = block == Blocks.anvil;
                  DamageSource damagesource = flag ? DamageSource.anvil : DamageSource.fallingBlock;
  
                  for (Entity entity : list) {
                      entity.attackEntityFrom(damagesource, (float) Math.min(MathHelper.floor_float((float) i * this.fallHurtAmount), this.fallHurtMax));
                  }
  
                  if (flag && (double) this.rand.nextFloat() < 0.05000000074505806D + (double) i * 0.05D) {
                      int j = this.fallTile.getValue(BlockAnvil.DAMAGE).intValue();
                      ++j;
  
                      if (j > 2) {
                          this.canSetAsBlock = true;
                      } else {
                          this.fallTile = this.fallTile.withProperty(BlockAnvil.DAMAGE, Integer.valueOf(j));
                      }
                  }
              }
          }
      }
  
      protected void writeEntityToNBT(NBTTagCompound tagCompound) {
          Block block = this.fallTile != null ? this.fallTile.getBlock() : Blocks.air;
          ResourceLocation resourcelocation = Block.blockRegistry.getNameForObject(block);
          tagCompound.setString("Block", resourcelocation == null ? "" : resourcelocation.toString());
          tagCompound.setByte("Data", (byte) block.getMetaFromState(this.fallTile));
          tagCompound.setByte("Time", (byte) this.fallTime);
          tagCompound.setBoolean("DropItem", this.shouldDropItem);
          tagCompound.setBoolean("HurtEntities", this.hurtEntities);
          tagCompound.setFloat("FallHurtAmount", this.fallHurtAmount);
          tagCompound.setInteger("FallHurtMax", this.fallHurtMax);
  
          if (this.tileEntityData != null) {
              tagCompound.setTag("TileEntityData", this.tileEntityData);
          }
      }
  
      protected void readEntityFromNBT(NBTTagCompound tagCompund) {
          int i = tagCompund.getByte("Data") & 255;
  
          if (tagCompund.hasKey("Block", 8)) {
              this.fallTile = Block.getBlockFromName(tagCompund.getString("Block")).getStateFromMeta(i);
          } else if (tagCompund.hasKey("TileID", 99)) {
              this.fallTile = Block.getBlockById(tagCompund.getInteger("TileID")).getStateFromMeta(i);
          } else {
              this.fallTile = Block.getBlockById(tagCompund.getByte("Tile") & 255).getStateFromMeta(i);
          }
  
          this.fallTime = tagCompund.getByte("Time") & 255;
          Block block = this.fallTile.getBlock();
  
          if (tagCompund.hasKey("HurtEntities", 99)) {
              this.hurtEntities = tagCompund.getBoolean("HurtEntities");
              this.fallHurtAmount = tagCompund.getFloat("FallHurtAmount");
              this.fallHurtMax = tagCompund.getInteger("FallHurtMax");
          } else if (block == Blocks.anvil) {
              this.hurtEntities = true;
          }
  
          if (tagCompund.hasKey("DropItem", 99)) {
              this.shouldDropItem = tagCompund.getBoolean("DropItem");
          }
  
          if (tagCompund.hasKey("TileEntityData", 10)) {
              this.tileEntityData = tagCompund.getCompoundTag("TileEntityData");
          }
  
          if (block == null || block.getMaterial() == Material.air) {
              this.fallTile = Blocks.sand.getDefaultState();
          }
      }
  
      public World getWorldObj() {
          return this.worldObj;
      }
  
      public void setHurtEntities(boolean p_145806_1_) {
          this.hurtEntities = p_145806_1_;
      }
  
      public boolean canRenderOnFire() {
          return false;
      }
  
      public void addEntityCrashInfo(CrashReportCategory category) {
          super.addEntityCrashInfo(category);
  
          if (this.fallTile != null) {
              Block block = this.fallTile.getBlock();
              category.addCrashSection("Immitating block ID", Integer.valueOf(Block.getIdFromBlock(block)));
              category.addCrashSection("Immitating block data", Integer.valueOf(block.getMetaFromState(this.fallTile)));
          }
      }
  
      public IBlockState getBlock() {
          return this.fallTile;
      }
  }
  