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MalisisCore is a framework dedicated to simplify many processes required during a mod development.
/*
* The MIT License (MIT)
*
* Copyright (c) 2014 Ordinastie
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package net.malisis.core.util;
import net.malisis.core.block.MalisisBlock;
import net.minecraft.block.Block;
import net.minecraft.block.state.IBlockState;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
/**
* Utility class for items.
*
* @author Ordinastie
*
*/
public class ItemUtils
{
/** Defines a full stack amount to process. */
public static final int FULL_STACK = -1;
/** Defines a half stack amount to process. */
public static final int HALF_STACK = -2;
/**
* Utility class to help merge {@link ItemStack itemStacks}.
* After calling {@link ItemStacksMerger#merge() merge()}, {@link ItemStacksMerger#merge merge} and {@link ItemStacksMerger#into into}
* will hold the results. An empty itemStack will automatically be converted to null.
*/
public static class ItemStacksMerger
{
/** The {@link ItemStack} to merge. */
public ItemStack merge;
/** The targetted {@link ItemStack} receiving the merge. */
public ItemStack into;
/** Amount of the {@link ItemStack} that was merged. -1 until {@link ItemStacksMerger#merge() merge()} is called. */
public int nbMerged = -1;
/**
* Instantiates the {@link ItemStacksMerger}.
*
* @param merge the merge
* @param into the into
*/
public ItemStacksMerger(ItemStack merge, ItemStack into)
{
this.merge = merge;
this.into = into;
}
/**
* Merges the full amount for the {@link ItemStacksMerger#merge merge} {@link ItemStack}.
*
* @return true, if stacks could be merged, false otherwise
*/
public boolean merge()
{
return merge(FULL_STACK);
}
/**
* Merges the specified amount for the {@link ItemStacksMerger#merge merge} {@link ItemStack}.
* Amount will be capped to the {@link ItemStack#getMaxStackSize()} amount, or 64 if both {@link ItemStacksMerger#merge merge} and
* {@link ItemStacksMerger#into into} are null.
*
* @param amount the amount to be merged
* @return true, if stacks could be merged, false otherwise
*/
public boolean merge(int amount)
{
int max = 64;
if (into != null)
max = into.getMaxStackSize();
else if (merge != null)
max = merge.getMaxStackSize();
return merge(amount, max);
}
/**
* Merges the specified amount for the {@link ItemStacksMerger#merge merge} {@link ItemStack}.
* Amount will be capped by intoMaxStackSize (used for inventory slots for example).
*
* @param amount the amount to be merged
* @param intoMaxStackSize max amount the into itemStack can hold
* @return true, if successful
*/
public boolean merge(int amount, int intoMaxStackSize)
{
nbMerged = 0;
if (!canMerge())
return false;
if (merge == null)
return false;
if (amount == FULL_STACK)
amount = merge.stackSize;
amount = Math.min(amount, merge.stackSize);
if (into == null)
{
nbMerged = Math.min(amount, intoMaxStackSize);
into = merge.copy();
into.stackSize = nbMerged;
merge.stackSize -= into.stackSize;
if (merge.stackSize <= 0)
merge = null;
return true;
}
nbMerged = Math.min(intoMaxStackSize, into.getMaxStackSize()) - into.stackSize;
if (nbMerged == 0)
return false;
nbMerged = Math.min(nbMerged, amount);
merge.stackSize -= nbMerged;
if (merge.stackSize == 0)
merge = null;
into.stackSize += nbMerged;
return true;
}
/**
* @return true, if {@link ItemStacksMerger#merge merge} and {@link ItemStacksMerger#into into} can be merged.
*/
public boolean canMerge()
{
return merge == null || into == null || areItemStacksStackable(merge, into);
}
}
/**
* Utility class to help split an {@link ItemStack}.
* An empty itemStack will automatically be converted to null.
*/
public static class ItemStackSplitter
{
/** The {@link ItemStack} to be split. */
public ItemStack source;
/** The restulting {@link ItemStack} after the split. */
public ItemStack split;
/** The amount of items to split. */
public int amount;
/**
* Instantiates the {@link ItemStackSplitter}.
*
* @param source the source
*/
public ItemStackSplitter(ItemStack source)
{
this.source = source;
}
/**
* Splits the {@link ItemStackSplitter#source} by the specified amount.
*
* @param amount the amount
* @return the item stack
*/
public ItemStack split(int amount)
{
if (source == null)
{
split = null;
return null;
}
if (amount == FULL_STACK)
amount = source.stackSize;
else if (amount == HALF_STACK)
amount = (int) Math.ceil((float) source.stackSize / 2);
this.amount = amount;
split = source.splitStack(amount);
if (source.stackSize == 0)
source = null;
return split;
}
}
/**
* Checks whether two {@link ItemStack itemStacks} can be stacked together
*
* @param stack1 first itemStack
* @param stack2 second itemStack
* @return true, if the itemStack can be stacked, false otherwise
*/
public static boolean areItemStacksStackable(ItemStack stack1, ItemStack stack2)
{
return !(stack1 == null || stack2 == null) && stack1.isStackable() && stack1.getItem() == stack2.getItem()
&& (!stack2.getHasSubtypes() || stack2.getMetadata() == stack1.getMetadata())
&& ItemStack.areItemStackTagsEqual(stack2, stack1);
}
public static IBlockState getStateFromItemStack(ItemStack itemStack)
{
if (itemStack == null)
return null;
Block block = Block.getBlockFromItem(itemStack.getItem());
if (block == null)
return null;
if (block instanceof MalisisBlock)
return ((MalisisBlock) block).getStateFromItemStack(itemStack);
return block.getStateFromMeta(itemStack.getItem().getMetadata(itemStack.getMetadata()));
}
public static ItemStack getItemStackFromState(IBlockState state)
{
Item item = Item.getItemFromBlock(state.getBlock());
if (item == null)
return null;
return new ItemStack(item, 0, state.getBlock().getMetaFromState(state));
}
}
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