ItemBlockIESlabs.java

package blusunrize.immersiveengineering.common.blocks;

import net.minecraft.block.Block;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumActionResult;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

import java.util.List;

public class ItemBlockIESlabs extends ItemBlockIEBase
{
	public ItemBlockIESlabs(Block b)
	{
		super(b);
	}

	@Override
	public void addInformation(ItemStack stack, EntityPlayer player, List<String> list, boolean advInfo)
	{
		super.addInformation(stack, player, list, advInfo);
	}

	@Override
	public EnumActionResult onItemUse(ItemStack stack, EntityPlayer player, World world, BlockPos pos, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ)
	{
		IBlockState iblockstate = world.getBlockState(pos);
        Block localBlock = iblockstate.getBlock();
		BlockPos posThere = pos;
		BlockPos posOffset = pos.offset(side);

        if(localBlock == Blocks.SNOW_LAYER && localBlock.isReplaceable(world, pos))
            side = EnumFacing.UP;
        else if(!localBlock.isReplaceable(world, pos))
            pos = pos.offset(side);
        
		TileEntityIESlab stackSlab = null;
		if(side.getAxis().isVertical() && this.block.equals(world.getBlockState(posThere).getBlock()) && world.getBlockState(posThere).getBlock().getMetaFromState(world.getBlockState(posThere))==stack.getItemDamage() )
		{
			TileEntity te = world.getTileEntity(posThere);
			if(te instanceof TileEntityIESlab && ((TileEntityIESlab)te).slabType+side.ordinal()==1)
				stackSlab = ((TileEntityIESlab)te);
		}
		else if(this.block.equals(world.getBlockState(posOffset).getBlock()) && world.getBlockState(posOffset).getBlock().getMetaFromState(world.getBlockState(posOffset))==stack.getItemDamage() )
		{
			TileEntity te = world.getTileEntity(posOffset);
			if(te instanceof TileEntityIESlab)
			{
				int type = ((TileEntityIESlab)te).slabType;
				if((type==0&&(side==EnumFacing.DOWN||hitY>=.5))||(type==1&&(side==EnumFacing.UP||hitY<=.5)))
					stackSlab = ((TileEntityIESlab)te);
			}
		}
		else
			return super.onItemUse(stack,player,world,pos,hand,side,hitX,hitY,hitZ);
		if(stackSlab!=null)
		{
			stackSlab.slabType=2;
			stackSlab.markContainingBlockForUpdate(null);
			world.playSound(stackSlab.getPos().getX()+.5, stackSlab.getPos().getY()+.5, stackSlab.getPos().getZ()+.5, this.block.getSoundType().getPlaceSound(), SoundCategory.BLOCKS, (this.block.getSoundType().getVolume() + 1.0F) / 2.0F, this.block.getSoundType().getPitch() * 0.8F, false);
			--stack.stackSize;
			return EnumActionResult.SUCCESS;
		}
		else
			return super.onItemUse(stack,player,world,pos,hand,side,hitX,hitY,hitZ);
	}

	@Override
	@SideOnly(Side.CLIENT)
	public boolean canPlaceBlockOnSide(World worldIn, BlockPos pos, EnumFacing side, EntityPlayer player, ItemStack stack)
	{
		return true;
	}

	@Override
	public boolean placeBlockAt(ItemStack stack, EntityPlayer player, World world, BlockPos pos, EnumFacing side, float hitX, float hitY, float hitZ, IBlockState newState)
	{
		boolean ret = super.placeBlockAt(stack, player, world, pos, side, hitX, hitY, hitZ, newState);
		if(ret)
		{
			TileEntity tileEntity = world.getTileEntity(pos);
			if(tileEntity instanceof TileEntityIESlab)
				((TileEntityIESlab) tileEntity).slabType = (side==EnumFacing.DOWN||(side!=EnumFacing.UP&&hitY>=.5))? 1: 0;
		}
		return ret;
	}
}