128 lines
4.5 KiB
Java
128 lines
4.5 KiB
Java
package net.shadowfacts.simplemultipart.item;
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import net.minecraft.block.BlockState;
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import net.minecraft.block.Blocks;
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import net.minecraft.item.Item;
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import net.minecraft.item.ItemUsageContext;
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import net.minecraft.util.ActionResult;
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import net.minecraft.util.BlockHitResult;
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import net.shadowfacts.simplemultipart.SimpleMultipart;
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import net.shadowfacts.simplemultipart.container.AbstractContainerBlockEntity;
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import net.shadowfacts.simplemultipart.container.MultipartContainer;
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import net.shadowfacts.simplemultipart.multipart.Multipart;
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import net.shadowfacts.simplemultipart.multipart.MultipartState;
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import net.shadowfacts.simplemultipart.util.MultipartPlacementContext;
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/**
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* An {@link Item} implementation that handles placing multiparts.
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*
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* Analogous to {@link net.minecraft.item.block.BlockItem}.
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*
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* @author shadowfacts
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* @since 0.1.1
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*/
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public class MultipartItem extends Item {
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protected Multipart part;
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/**
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* Creates a Multipart Item for the given part with.
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*
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* @param part The multipart.
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*/
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public MultipartItem(Multipart part) {
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this(part, new Settings());
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}
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/**
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* Creates a Multipart Item for the given part with the given item settings.
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*
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* @param part The multipart.
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* @param settings The settings for this item.
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* @since 0.1.2
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*/
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public MultipartItem(Multipart part, Settings settings) {
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super(settings);
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this.part = part;
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}
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@Override
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public ActionResult useOnBlock(ItemUsageContext context) {
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return tryPlace(context);
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}
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/**
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* Attempts to place this item's multipart in the given context.
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*
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* If the player clicked an existing multipart container, it will attempt to insert into that one, falling back on
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* creating a new container.
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* Which container the placement is being attempted in can be determined from {@link MultipartPlacementContext#isOffset()}.
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*
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* @param context The item usage context.
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* @return The result of the placement.
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*/
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protected ActionResult tryPlace(ItemUsageContext context) {
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// If a multipart inside an existing container was clicked, try inserting into that
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MultipartContainer hitContainer = getContainer(context);
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if (hitContainer != null && tryPlace(new MultipartPlacementContext(hitContainer, false, context))) {
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return ActionResult.SUCCESS;
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}
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// Otherwise, get or create a new container and try inserting into that
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BlockHitResult offsetHitResult = new BlockHitResult(context.method_17698(), context.getFacing(), context.getPos().offset(context.getFacing()), context.method_17699());
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ItemUsageContext offsetContext = new ItemUsageContext(context.getPlayer(), context.getItemStack(), offsetHitResult);
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MultipartContainer offsetContainer = getOrCreateContainer(offsetContext);
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if (offsetContainer != null) {
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if (tryPlace(new MultipartPlacementContext(offsetContainer, true, offsetContext))) {
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return ActionResult.SUCCESS;
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} else {
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// if the a new container was created, and no part was inserted, remove the empty container
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if (!offsetContainer.hasParts()) {
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context.getWorld().setBlockState(offsetContext.getPos(), Blocks.AIR.getDefaultState());
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}
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}
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}
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return ActionResult.FAILURE;
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}
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protected MultipartContainer getContainer(ItemUsageContext context) {
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BlockState state = context.getWorld().getBlockState(context.getPos());
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if (state.getBlock() == SimpleMultipart.containerBlock) {
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return (MultipartContainer)context.getWorld().getBlockEntity(context.getPos());
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} else {
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return null;
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}
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}
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protected MultipartContainer getOrCreateContainer(ItemUsageContext context) {
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MultipartContainer container = getContainer(context);
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if (container == null) {
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BlockState existing = context.getWorld().getBlockState(context.getPos());
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if (existing.isAir()) { // TODO: should check is replaceable (might not be mapped?)
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context.getWorld().setBlockState(context.getPos(), SimpleMultipart.containerBlock.getDefaultState());
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container = (MultipartContainer)context.getWorld().getBlockEntity(context.getPos());
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}
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}
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return container;
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}
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/**
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* Attempts to insert this item's multipart into the container specified by the given context.
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*
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* @param context The multipart placement context.
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* @return If the placement succeeded.
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*/
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protected boolean tryPlace(MultipartPlacementContext context) {
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MultipartState placementState = part.getPlacementState(context);
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if (context.getContainer().canInsert(placementState)) {
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context.getContainer().insert(placementState);
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context.getItemStack().subtractAmount(1);
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return true;
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}
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return false;
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}
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}
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