Code/net/minecraft/world/inventory/Slot.java

package net.minecraft.world.inventory;

import java.util.Optional;
import javax.annotation.Nullable;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.world.Container;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;

public class Slot {
    private final int slot;
    public final Container container;
    public int index;
    public final int x;
    public final int y;

    public Slot(Container p_40223_, int p_40224_, int p_40225_, int p_40226_) {
        this.container = p_40223_;
        this.slot = p_40224_;
        this.x = p_40225_;
        this.y = p_40226_;
    }

    public void onQuickCraft(ItemStack p_40235_, ItemStack p_40236_) {
        int i = p_40236_.getCount() - p_40235_.getCount();
        if (i > 0) {
            this.onQuickCraft(p_40236_, i);
        }
    }

    protected void onQuickCraft(ItemStack p_40232_, int p_40233_) {
    }

    protected void onSwapCraft(int p_40237_) {
    }

    protected void checkTakeAchievements(ItemStack p_40239_) {
    }

    public void onTake(Player p_150645_, ItemStack p_150646_) {
        this.setChanged();
    }

    public boolean mayPlace(ItemStack p_40231_) {
        return true;
    }

    public ItemStack getItem() {
        return this.container.getItem(this.slot);
    }

    public boolean hasItem() {
        return !this.getItem().isEmpty();
    }

    public void setByPlayer(ItemStack p_270152_) {
        this.setByPlayer(p_270152_, this.getItem());
    }

    public void setByPlayer(ItemStack p_299954_, ItemStack p_301385_) {
        this.set(p_299954_);
    }

    public void set(ItemStack p_40240_) {
        this.container.setItem(this.slot, p_40240_);
        this.setChanged();
    }

    public void setChanged() {
        this.container.setChanged();
    }

    public int getMaxStackSize() {
        return this.container.getMaxStackSize();
    }

    public int getMaxStackSize(ItemStack p_40238_) {
        return Math.min(this.getMaxStackSize(), p_40238_.getMaxStackSize());
    }

    @Nullable
    public ResourceLocation getNoItemIcon() {
        return null;
    }

    public ItemStack remove(int p_40227_) {
        return this.container.removeItem(this.slot, p_40227_);
    }

    public boolean mayPickup(Player p_40228_) {
        return true;
    }

    public boolean isActive() {
        return true;
    }

    public Optional<ItemStack> tryRemove(int p_150642_, int p_150643_, Player p_150644_) {
        if (!this.mayPickup(p_150644_)) {
            return Optional.empty();
        } else if (!this.allowModification(p_150644_) && p_150643_ < this.getItem().getCount()) {
            return Optional.empty();
        } else {
            p_150642_ = Math.min(p_150642_, p_150643_);
            ItemStack itemstack = this.remove(p_150642_);
            if (itemstack.isEmpty()) {
                return Optional.empty();
            } else {
                if (this.getItem().isEmpty()) {
                    this.setByPlayer(ItemStack.EMPTY, itemstack);
                }

                return Optional.of(itemstack);
            }
        }
    }

    public ItemStack safeTake(int p_150648_, int p_150649_, Player p_150650_) {
        Optional<ItemStack> optional = this.tryRemove(p_150648_, p_150649_, p_150650_);
        optional.ifPresent(p_150655_ -> this.onTake(p_150650_, p_150655_));
        return optional.orElse(ItemStack.EMPTY);
    }

    public ItemStack safeInsert(ItemStack p_150660_) {
        return this.safeInsert(p_150660_, p_150660_.getCount());
    }

    public ItemStack safeInsert(ItemStack p_150657_, int p_150658_) {
        if (!p_150657_.isEmpty() && this.mayPlace(p_150657_)) {
            ItemStack itemstack = this.getItem();
            int i = Math.min(Math.min(p_150658_, p_150657_.getCount()), this.getMaxStackSize(p_150657_) - itemstack.getCount());
            if (i <= 0) {
                return p_150657_;
            } else {
                if (itemstack.isEmpty()) {
                    this.setByPlayer(p_150657_.split(i));
                } else if (ItemStack.isSameItemSameComponents(itemstack, p_150657_)) {
                    p_150657_.shrink(i);
                    itemstack.grow(i);
                    this.setByPlayer(itemstack);
                }

                return p_150657_;
            }
        } else {
            return p_150657_;
        }
    }

    public boolean allowModification(Player p_150652_) {
        return this.mayPickup(p_150652_) && this.mayPlace(this.getItem());
    }

    public int getContainerSlot() {
        return this.slot;
    }

    public boolean isHighlightable() {
        return true;
    }

    public boolean isFake() {
        return false;
    }
}