minecraft-source/src/net/minecraft/world/item/BlockItem.java

package net.minecraft.world.item;

import net.minecraft.world.level.block.state.AbstractStateHolder;
import java.util.Map;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.network.chat.Component;
import java.util.List;
import net.minecraft.core.NonNullList;
import net.minecraft.world.level.block.entity.BlockEntity;
import net.minecraft.server.MinecraftServer;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.phys.shapes.CollisionContext;
import net.minecraft.world.level.block.state.properties.Property;
import java.util.Iterator;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.nbt.CompoundTag;
import javax.annotation.Nullable;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.world.level.block.SoundType;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.Level;
import net.minecraft.core.BlockPos;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.sounds.SoundSource;
import net.minecraft.advancements.CriteriaTriggers;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.level.block.Block;

public class BlockItem extends Item {
    @Deprecated
    private final Block block;
    
    public BlockItem(final Block bpe, final Properties a) {
        super(a);
        this.block = bpe;
    }
    
    @Override
    public InteractionResult useOn(final UseOnContext bfw) {
        final InteractionResult aji3 = this.place(new BlockPlaceContext(bfw));
        if (aji3 != InteractionResult.SUCCESS && this.isEdible()) {
            return this.use(bfw.level, bfw.player, bfw.hand).getResult();
        }
        return aji3;
    }
    
    public InteractionResult place(final BlockPlaceContext bcn) {
        if (!bcn.canPlace()) {
            return InteractionResult.FAIL;
        }
        final BlockPlaceContext bcn2 = this.updatePlacementContext(bcn);
        if (bcn2 == null) {
            return InteractionResult.FAIL;
        }
        final BlockState byg4 = this.getPlacementState(bcn2);
        if (byg4 == null) {
            return InteractionResult.FAIL;
        }
        if (!this.placeBlock(bcn2, byg4)) {
            return InteractionResult.FAIL;
        }
        final BlockPos fk5 = bcn2.getClickedPos();
        final Level bjt6 = bcn2.getLevel();
        final Player ayg7 = bcn2.getPlayer();
        final ItemStack bek8 = bcn2.getItemInHand();
        BlockState byg5 = bjt6.getBlockState(fk5);
        final Block bpe10 = byg5.getBlock();
        if (bpe10 == byg4.getBlock()) {
            byg5 = this.updateBlockStateFromTag(fk5, bjt6, bek8, byg5);
            this.updateCustomBlockEntityTag(fk5, bjt6, ayg7, bek8, byg5);
            bpe10.setPlacedBy(bjt6, fk5, byg5, ayg7, bek8);
            if (ayg7 instanceof ServerPlayer) {
                CriteriaTriggers.PLACED_BLOCK.trigger((ServerPlayer)ayg7, fk5, bek8);
            }
        }
        final SoundType buj11 = byg5.getSoundType();
        bjt6.playSound(ayg7, fk5, this.getPlaceSound(byg5), SoundSource.BLOCKS, (buj11.getVolume() + 1.0f) / 2.0f, buj11.getPitch() * 0.8f);
        bek8.shrink(1);
        return InteractionResult.SUCCESS;
    }
    
    protected SoundEvent getPlaceSound(final BlockState byg) {
        return byg.getSoundType().getPlaceSound();
    }
    
    @Nullable
    public BlockPlaceContext updatePlacementContext(final BlockPlaceContext bcn) {
        return bcn;
    }
    
    protected boolean updateCustomBlockEntityTag(final BlockPos fk, final Level bjt, @Nullable final Player ayg, final ItemStack bek, final BlockState byg) {
        return updateCustomBlockEntityTag(bjt, ayg, fk, bek);
    }
    
    @Nullable
    protected BlockState getPlacementState(final BlockPlaceContext bcn) {
        final BlockState byg3 = this.getBlock().getStateForPlacement(bcn);
        return (byg3 != null && this.canPlace(bcn, byg3)) ? byg3 : null;
    }
    
    private BlockState updateBlockStateFromTag(final BlockPos fk, final Level bjt, final ItemStack bek, final BlockState byg) {
        BlockState byg2 = byg;
        final CompoundTag jt7 = bek.getTag();
        if (jt7 != null) {
            final CompoundTag jt8 = jt7.getCompound("BlockStateTag");
            final StateDefinition<Block, BlockState> byh9 = byg2.getBlock().getStateDefinition();
            for (final String string11 : jt8.getAllKeys()) {
                final Property<?> bzj12 = byh9.getProperty(string11);
                if (bzj12 != null) {
                    final String string12 = jt8.get(string11).getAsString();
                    byg2 = BlockItem.updateState(byg2, bzj12, string12);
                }
            }
        }
        if (byg2 != byg) {
            bjt.setBlock(fk, byg2, 2);
        }
        return byg2;
    }
    
    private static <T extends Comparable<T>> BlockState updateState(final BlockState byg, final Property<T> bzj, final String string) {
        return bzj.getValue(string).<BlockState>map(comparable -> (BlockState)((AbstractStateHolder<Object, Object>)byg).<T, Comparable>setValue(bzj, comparable)).orElse(byg);
    }
    
    protected boolean canPlace(final BlockPlaceContext bcn, final BlockState byg) {
        final Player ayg4 = bcn.getPlayer();
        final CollisionContext cvn5 = (ayg4 == null) ? CollisionContext.empty() : CollisionContext.of(ayg4);
        return (!this.mustSurvive() || byg.canSurvive(bcn.getLevel(), bcn.getClickedPos())) && bcn.getLevel().isUnobstructed(byg, bcn.getClickedPos(), cvn5);
    }
    
    protected boolean mustSurvive() {
        return true;
    }
    
    protected boolean placeBlock(final BlockPlaceContext bcn, final BlockState byg) {
        return bcn.getLevel().setBlock(bcn.getClickedPos(), byg, 11);
    }
    
    public static boolean updateCustomBlockEntityTag(final Level bjt, @Nullable final Player ayg, final BlockPos fk, final ItemStack bek) {
        final MinecraftServer minecraftServer5 = bjt.getServer();
        if (minecraftServer5 == null) {
            return false;
        }
        final CompoundTag jt6 = bek.getTagElement("BlockEntityTag");
        if (jt6 != null) {
            final BlockEntity bwi7 = bjt.getBlockEntity(fk);
            if (bwi7 != null) {
                if (!bjt.isClientSide && bwi7.onlyOpCanSetNbt() && (ayg == null || !ayg.canUseGameMasterBlocks())) {
                    return false;
                }
                final CompoundTag jt7 = bwi7.save(new CompoundTag());
                final CompoundTag jt8 = jt7.copy();
                jt7.merge(jt6);
                jt7.putInt("x", fk.getX());
                jt7.putInt("y", fk.getY());
                jt7.putInt("z", fk.getZ());
                if (!jt7.equals(jt8)) {
                    bwi7.load(jt7);
                    bwi7.setChanged();
                    return true;
                }
            }
        }
        return false;
    }
    
    @Override
    public String getDescriptionId() {
        return this.getBlock().getDescriptionId();
    }
    
    @Override
    public void fillItemCategory(final CreativeModeTab bda, final NonNullList<ItemStack> fy) {
        if (this.allowdedIn(bda)) {
            this.getBlock().fillItemCategory(bda, fy);
        }
    }
    
    @Override
    public void appendHoverText(final ItemStack bek, @Nullable final Level bjt, final List<Component> list, final TooltipFlag bft) {
        super.appendHoverText(bek, bjt, list, bft);
        this.getBlock().appendHoverText(bek, bjt, list, bft);
    }
    
    public Block getBlock() {
        return this.block;
    }
    
    public void registerBlocks(final Map<Block, Item> map, final Item bef) {
        map.put(this.getBlock(), bef);
    }
}