Update for spigot 1.12

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/HolographicDisplays.java

@@ -150,11 +150,15 @@ public class HolographicDisplays extends JavaPlugin {
 			nmsManager = new com.gmail.filoghost.holographicdisplays.nms.v1_11_R1.NmsManagerImpl();
 			MinecraftVersion.set(MinecraftVersion.v1_11);
 			
+		} else if ("v1_12_R1".equals(version)) {
+			nmsManager = new com.gmail.filoghost.holographicdisplays.nms.v1_12_R1.NmsManagerImpl();
+			MinecraftVersion.set(MinecraftVersion.v1_12);
+			
 		} else {
 			printWarnAndDisable(
 				"******************************************************",
 				"     This version of HolographicDisplays only",
-				"     works on server versions from 1.7 to 1.11.",
+				"     works on server versions from 1.7 to 1.12.",
 				"     The plugin will be disabled.",
 				"******************************************************"
 			);

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSArmorStand.java

@@ -0,0 +1,79 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import java.util.Collection;
+
+import org.bukkit.EntityEffect;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.v1_12_R1.CraftServer;
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftArmorStand;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.util.EulerAngle;
+import org.bukkit.util.Vector;
+
+public class CraftNMSArmorStand extends CraftArmorStand {
+
+	public CraftNMSArmorStand(CraftServer server, EntityNMSArmorStand entity) {
+		super(server, entity);
+	}
+	
+	// Disallow all the bukkit methods.
+	
+	@Override
+	public void remove() {
+		// Cannot be removed, this is the most important to override.
+	}
+
+	// Methods from Armor stand class
+	
+	@Override public void setArms(boolean arms) { }
+	@Override public void setBasePlate(boolean basePlate) { }
+	@Override public void setBodyPose(EulerAngle pose) { }
+	@Override public void setBoots(ItemStack item) { }
+	@Override public void setChestplate(ItemStack item) { }
+	@Override public void setHeadPose(EulerAngle pose) { }
+	@Override public void setHelmet(ItemStack item) { }
+	@Override public void setItemInHand(ItemStack item) { }
+	@Override public void setLeftArmPose(EulerAngle pose) { }
+	@Override public void setLeftLegPose(EulerAngle pose) { }
+	@Override public void setLeggings(ItemStack item) { }
+	@Override public void setRightArmPose(EulerAngle pose) { }
+	@Override public void setRightLegPose(EulerAngle pose) { }
+	@Override public void setSmall(boolean small) { }
+	@Override public void setVisible(boolean visible) { }
+	@Override public void setMarker(boolean marker) { }
+
+	// Methods from LivingEntity class
+	@Override public boolean addPotionEffect(PotionEffect effect) { return false; }
+	@Override public boolean addPotionEffect(PotionEffect effect, boolean param) { return false; }
+	@Override public boolean addPotionEffects(Collection<PotionEffect> effects) { return false; }
+	@Override public void setRemoveWhenFarAway(boolean remove) { }
+	@Override public void setAI(boolean ai) { }
+	@Override public void setCanPickupItems(boolean pickup) { }
+	@Override public void setCollidable(boolean collidable) { }
+	@Override public void setGliding(boolean gliding) {	}
+	@Override public boolean setLeashHolder(Entity holder) { return false; }
+	
+	// Methods from Entity
+	@Override public void setVelocity(Vector vel) { }
+	@Override public boolean teleport(Location loc) { return false; }
+	@Override public boolean teleport(Entity entity) { return false; }
+	@Override public boolean teleport(Location loc, TeleportCause cause) { return false; }
+	@Override public boolean teleport(Entity entity, TeleportCause cause) { return false; }
+	@Override public void setFireTicks(int ticks) { }
+	@Override public boolean setPassenger(Entity entity) { return false; }
+	@Override public boolean eject() { return false; }
+	@Override public boolean leaveVehicle() { return false; }
+	@Override public void playEffect(EntityEffect effect) { }
+	@Override public void setCustomName(String name) { }
+	@Override public void setCustomNameVisible(boolean flag) { }
+	@Override public void setGlowing(boolean flag) { }
+	@Override public void setGravity(boolean gravity) { }
+	@Override public void setInvulnerable(boolean flag) { }
+	@Override public void setMomentum(Vector value) { }
+	@Override public void setSilent(boolean flag) { }
+	@Override public void setTicksLived(int value) { }
+	
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSItem.java

@@ -0,0 +1,49 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import org.bukkit.EntityEffect;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.v1_12_R1.CraftServer;
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftItem;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.util.Vector;
+
+public class CraftNMSItem extends CraftItem {
+
+	public CraftNMSItem(CraftServer server, EntityNMSItem entity) {
+		super(server, entity);
+	}
+
+	// Disallow all the bukkit methods.
+	
+	@Override
+	public void remove() {
+		// Cannot be removed, this is the most important to override.
+	}
+
+	// Methods from Entity
+	@Override public void setVelocity(Vector vel) { }
+	@Override public boolean teleport(Location loc) { return false; }
+	@Override public boolean teleport(Entity entity) { return false; }
+	@Override public boolean teleport(Location loc, TeleportCause cause) { return false; }
+	@Override public boolean teleport(Entity entity, TeleportCause cause) { return false; }
+	@Override public void setFireTicks(int ticks) { }
+	@Override public boolean setPassenger(Entity entity) { return false; }
+	@Override public boolean eject() { return false; }
+	@Override public boolean leaveVehicle() { return false; }
+	@Override public void playEffect(EntityEffect effect) { }
+	@Override public void setCustomName(String name) { }
+	@Override public void setCustomNameVisible(boolean flag) { }
+	@Override public void setGlowing(boolean flag) { }
+	@Override public void setGravity(boolean gravity) { }
+	@Override public void setInvulnerable(boolean flag) { }
+	@Override public void setMomentum(Vector value) { }
+	@Override public void setSilent(boolean flag) { }
+	@Override public void setTicksLived(int value) { }
+	
+	// Methods from Item
+	@Override public void setItemStack(ItemStack stack) { }
+	@Override public void setPickupDelay(int delay) { }
+	
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSSlime.java

@@ -0,0 +1,61 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import java.util.Collection;
+
+import org.bukkit.EntityEffect;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.v1_12_R1.CraftServer;
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftSlime;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.util.Vector;
+
+public class CraftNMSSlime extends CraftSlime {
+
+	public CraftNMSSlime(CraftServer server, EntityNMSSlime entity) {
+		super(server, entity);
+	}
+	
+	// Disallow all the bukkit methods.
+	
+	@Override
+	public void remove() {
+		// Cannot be removed, this is the most important to override.
+	}
+	
+	// Methods from LivingEntity class
+	@Override public boolean addPotionEffect(PotionEffect effect) { return false; }
+	@Override public boolean addPotionEffect(PotionEffect effect, boolean param) { return false; }
+	@Override public boolean addPotionEffects(Collection<PotionEffect> effects) { return false; }
+	@Override public void setRemoveWhenFarAway(boolean remove) { }
+	@Override public void setAI(boolean ai) { }
+	@Override public void setCanPickupItems(boolean pickup) { }
+	@Override public void setCollidable(boolean collidable) { }
+	@Override public void setGliding(boolean gliding) {	}
+	@Override public boolean setLeashHolder(Entity holder) { return false; }
+
+	// Methods from Entity
+	@Override public void setVelocity(Vector vel) { }
+	@Override public boolean teleport(Location loc) { return false; }
+	@Override public boolean teleport(Entity entity) { return false; }
+	@Override public boolean teleport(Location loc, TeleportCause cause) { return false; }
+	@Override public boolean teleport(Entity entity, TeleportCause cause) { return false; }
+	@Override public void setFireTicks(int ticks) { }
+	@Override public boolean setPassenger(Entity entity) { return false; }
+	@Override public boolean eject() { return false; }
+	@Override public boolean leaveVehicle() { return false; }
+	@Override public void playEffect(EntityEffect effect) { }
+	@Override public void setCustomName(String name) { }
+	@Override public void setCustomNameVisible(boolean flag) { }
+	@Override public void setGlowing(boolean flag) { }
+	@Override public void setGravity(boolean gravity) { }
+	@Override public void setInvulnerable(boolean flag) { }
+	@Override public void setMomentum(Vector value) { }
+	@Override public void setSilent(boolean flag) { }
+	@Override public void setTicksLived(int value) { }
+
+	// Methods from Slime
+	@Override public void setSize(int size) { }
+	
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSArmorStand.java

@@ -0,0 +1,235 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftEntity;
+
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftHologramLine;
+import com.gmail.filoghost.holographicdisplays.util.ReflectionUtils;
+import com.gmail.filoghost.holographicdisplays.util.Utils;
+
+import net.minecraft.server.v1_12_R1.AxisAlignedBB;
+import net.minecraft.server.v1_12_R1.DamageSource;
+import net.minecraft.server.v1_12_R1.EntityArmorStand;
+import net.minecraft.server.v1_12_R1.EntityHuman;
+import net.minecraft.server.v1_12_R1.EntityPlayer;
+import net.minecraft.server.v1_12_R1.EnumHand;
+import net.minecraft.server.v1_12_R1.EnumInteractionResult;
+import net.minecraft.server.v1_12_R1.EnumItemSlot;
+import net.minecraft.server.v1_12_R1.ItemStack;
+import net.minecraft.server.v1_12_R1.NBTTagCompound;
+import net.minecraft.server.v1_12_R1.PacketPlayOutEntityTeleport;
+import net.minecraft.server.v1_12_R1.SoundEffect;
+import net.minecraft.server.v1_12_R1.Vec3D;
+import net.minecraft.server.v1_12_R1.World;
+
+public class EntityNMSArmorStand extends EntityArmorStand implements NMSArmorStand {
+
+	private boolean lockTick;
+	private CraftHologramLine parentPiece;
+	
+	public EntityNMSArmorStand(World world, CraftHologramLine parentPiece) {
+		super(world);
+		super.setInvisible(true);
+		super.setSmall(true);
+		super.setArms(false);
+		super.setNoGravity(true);
+		super.setBasePlate(true);
+		super.setMarker(true);
+		super.collides = false;
+		this.parentPiece = parentPiece;
+		forceSetBoundingBox(new NullBoundingBox());
+	}
+	
+	
+	@Override
+	public void b(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+	}
+	
+	@Override
+	public boolean c(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return false;
+	}
+
+	@Override
+	public boolean d(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return false;
+	}
+	
+	@Override
+	public NBTTagCompound save(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return nbttagcompound;
+	}
+	
+	@Override
+	public void f(NBTTagCompound nbttagcompound) {
+		// Do not load NBT.
+	}
+	
+	@Override
+	public void a(NBTTagCompound nbttagcompound) {
+		// Do not load NBT.
+	}
+	
+	@Override
+	public boolean isInvulnerable(DamageSource source) {
+		/*
+		 * The field Entity.invulnerable is private.
+		 * It's only used while saving NBTTags, but since the entity would be killed
+		 * on chunk unload, we prefer to override isInvulnerable().
+		 */
+	    return true;
+	}
+	
+	@Override
+	public boolean isCollidable() {
+		return false;
+	}
+	
+	@Override
+	public void setCustomName(String customName) {
+		// Locks the custom name.
+	}
+	
+	@Override
+	public void inactiveTick() {
+		// Check inactive ticks.
+		
+		if (!lockTick) {
+			super.inactiveTick();
+		}
+	}
+	
+	@Override
+	public void setCustomNameVisible(boolean visible) {
+		// Locks the custom name.
+	}
+
+	@Override
+	public EnumInteractionResult a(EntityHuman human, Vec3D vec3d, EnumHand enumhand) {
+		// Prevent stand being equipped
+		return EnumInteractionResult.PASS;
+	}
+
+	@Override
+	public boolean c(int i, ItemStack item) {
+		// Prevent stand being equipped
+		return false;
+	}
+
+	@Override
+	public void setSlot(EnumItemSlot enumitemslot, ItemStack itemstack) {
+		// Prevent stand being equipped
+	}
+	
+	@Override
+	public void a(AxisAlignedBB boundingBox) {
+		// Do not change it!
+	}
+	
+	public void forceSetBoundingBox(AxisAlignedBB boundingBox) {
+		super.a(boundingBox);
+	}
+	
+	@Override
+	public int getId() {
+		StackTraceElement element = ReflectionUtils.getStackTraceElement(2);
+		if (element != null && element.getFileName() != null && element.getFileName().equals("EntityTrackerEntry.java") && 158 < element.getLineNumber() && element.getLineNumber() < 168) {
+			// Then this method is being called when creating a new movement packet, we return a fake ID!
+			return -1;
+		}
+		
+		return super.getId();
+	}
+
+	@Override
+	public void B_() {
+		if (!lockTick) {
+			super.B_();
+		}
+	}
+	
+	@Override
+	public void a(SoundEffect soundeffect, float f, float f1) {
+	    // Remove sounds.
+	}
+	
+	@Override
+	public void setCustomNameNMS(String name) {
+		if (name != null && name.length() > 300) {
+			name = name.substring(0, 300);
+		}
+		super.setCustomName(name);
+		super.setCustomNameVisible(name != null && !name.isEmpty());
+	}
+	
+	@Override
+	public String getCustomNameNMS() {
+		return super.getCustomName();
+	}
+	
+	@Override
+	public void setLockTick(boolean lock) {
+		lockTick = lock;
+	}
+	
+	@Override
+	public void die() {
+		// Prevent being killed.
+	}
+	
+	@Override
+	public CraftEntity getBukkitEntity() {
+		if (super.bukkitEntity == null) {
+			super.bukkitEntity = new CraftNMSArmorStand(super.world.getServer(), this);
+	    }
+		return super.bukkitEntity;
+	}
+	
+	@Override
+	public void killEntityNMS() {
+		super.dead = true;
+	}
+	
+	@Override
+	public void setLocationNMS(double x, double y, double z) {
+		super.setPosition(x, y, z);
+		
+		// Send a packet near to update the position.
+		PacketPlayOutEntityTeleport teleportPacket = new PacketPlayOutEntityTeleport(this);
+
+		for (Object obj : super.world.players) {
+			if (obj instanceof EntityPlayer) {
+				EntityPlayer nmsPlayer = (EntityPlayer) obj;
+
+				double distanceSquared = Utils.square(nmsPlayer.locX - super.locX) + Utils.square(nmsPlayer.locZ - super.locZ);
+				if (distanceSquared < 8192 && nmsPlayer.playerConnection != null) {
+					nmsPlayer.playerConnection.sendPacket(teleportPacket);
+				}
+			}
+		}
+	}
+
+	@Override
+	public boolean isDeadNMS() {
+		return super.dead;
+	}
+	
+	@Override
+	public int getIdNMS() {
+		return super.getId(); // Return the real ID without checking the stack trace.
+	}
+
+	@Override
+	public CraftHologramLine getHologramLine() {
+		return parentPiece;
+	}
+	
+	@Override
+	public org.bukkit.entity.Entity getBukkitEntityNMS() {
+		return getBukkitEntity();
+	}
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSItem.java

@@ -0,0 +1,232 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import net.minecraft.server.v1_12_R1.Entity;
+import net.minecraft.server.v1_12_R1.Blocks;
+import net.minecraft.server.v1_12_R1.DamageSource;
+import net.minecraft.server.v1_12_R1.EntityHuman;
+import net.minecraft.server.v1_12_R1.EntityItem;
+import net.minecraft.server.v1_12_R1.EntityPlayer;
+import net.minecraft.server.v1_12_R1.ItemStack;
+import net.minecraft.server.v1_12_R1.NBTTagCompound;
+import net.minecraft.server.v1_12_R1.NBTTagList;
+import net.minecraft.server.v1_12_R1.NBTTagString;
+import net.minecraft.server.v1_12_R1.World;
+
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftEntity;
+import org.bukkit.craftbukkit.v1_12_R1.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+
+import com.gmail.filoghost.holographicdisplays.listener.MainListener;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSItem;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftItemLine;
+import com.gmail.filoghost.holographicdisplays.util.DebugHandler;
+import com.gmail.filoghost.holographicdisplays.util.ItemUtils;
+import com.gmail.filoghost.holographicdisplays.util.ReflectionUtils;
+
+public class EntityNMSItem extends EntityItem implements NMSItem {
+	
+	private boolean lockTick;
+	private CraftItemLine parentPiece;
+	
+	public EntityNMSItem(World world, CraftItemLine piece) {
+		super(world);
+		super.pickupDelay = 32767; // Lock the item pickup delay, also prevents entities from picking up the item
+		this.parentPiece = piece;
+	}
+	
+	@Override
+	public void B_() {
+		
+		// So it won't get removed.
+		ticksLived = 0;
+		
+		if (!lockTick) {
+			super.B_();
+		}
+	}
+	
+	// Method called when a player is near.
+	@Override
+	public void d(EntityHuman human) {
+		
+		if (human.locY < super.locY - 1.5 || human.locY > super.locY + 1.0) {
+			// Too low or too high, it's a bit weird.
+			return;
+		}
+		
+		if (parentPiece.getPickupHandler() != null && human instanceof EntityPlayer) {
+			MainListener.handleItemLinePickup((Player) human.getBukkitEntity(), parentPiece.getPickupHandler(), parentPiece.getParent());
+			// It is never added to the inventory.
+		}
+	}
+	
+	@Override
+	public void b(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+	}
+	
+	@Override
+	public boolean c(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return false;
+	}
+
+	@Override
+	public boolean d(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return false;
+	}
+	
+	@Override
+	public NBTTagCompound save(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return nbttagcompound;
+	}
+	
+	@Override
+	public void f(NBTTagCompound nbttagcompound) {
+		// Do not load NBT.
+	}
+	
+	@Override
+	public void a(NBTTagCompound nbttagcompound) {
+		// Do not load NBT.
+	}
+	
+	@Override
+	public boolean isInvulnerable(DamageSource source) {
+		/*
+		 * The field Entity.invulnerable is private.
+		 * It's only used while saving NBTTags, but since the entity would be killed
+		 * on chunk unload, we prefer to override isInvulnerable().
+		 */
+	    return true;
+	}
+	
+	@Override
+	public boolean isCollidable() {
+		return false;
+	}
+	
+	@Override
+	public void inactiveTick() {
+		// Check inactive ticks.
+		
+		if (!lockTick) {
+			super.inactiveTick();
+		}
+	}
+
+	@Override
+	public void setLockTick(boolean lock) {
+		lockTick = lock;
+	}
+	
+	@Override
+	public void die() {
+		// Prevent being killed.
+	}
+
+	@Override
+	public CraftEntity getBukkitEntity() {
+		if (super.bukkitEntity == null) {
+			super.bukkitEntity = new CraftNMSItem(super.world.getServer(), this);
+	    }
+		return super.bukkitEntity;
+	}
+
+	@Override
+	public boolean isDeadNMS() {
+		return super.dead;
+	}
+	
+	@Override
+	public void killEntityNMS() {
+		super.dead = true;
+	}
+	
+	@Override
+	public void setLocationNMS(double x, double y, double z) {
+		super.setPosition(x, y, z);
+	}
+
+	@Override
+	public void setItemStackNMS(org.bukkit.inventory.ItemStack stack) {
+		ItemStack newItem = CraftItemStack.asNMSCopy(stack);
+		
+		if (newItem == null) {
+			newItem = new ItemStack(Blocks.BEDROCK);
+		}
+
+		if (newItem.getTag() == null) {
+			newItem.setTag(new NBTTagCompound());
+		}
+		NBTTagCompound display = newItem.getTag().getCompound("display"); // Returns a new NBTTagCompound if not existing
+		if (!newItem.getTag().hasKey("display")) {
+			newItem.getTag().set("display", display);
+		}
+
+		NBTTagList tagList = new NBTTagList();
+		tagList.add(new NBTTagString(ItemUtils.ANTISTACK_LORE)); // Antistack lore
+		display.set("Lore", tagList);
+
+		newItem.setCount(1);
+		
+		setItemStack(newItem);
+	}
+	
+	@Override
+	public int getIdNMS() {
+		return super.getId();
+	}
+	
+	@Override
+	public CraftItemLine getHologramLine() {
+		return parentPiece;
+	}
+	
+	@Override
+	public void allowPickup(boolean pickup) {
+		if (pickup) {
+			super.pickupDelay = 0;
+		} else {
+			super.pickupDelay = 32767;
+		}
+	}
+	
+	@Override
+	public org.bukkit.entity.Entity getBukkitEntityNMS() {
+		return getBukkitEntity();
+	}
+	
+	@Override
+	public void setPassengerOfNMS(NMSEntityBase vehicleBase) {
+		if (vehicleBase == null || !(vehicleBase instanceof Entity)) {
+			// It should never dismount
+			return;
+		}
+		
+		Entity entity = (Entity) vehicleBase;
+
+		try {
+			if (super.bJ() != null) {
+	        	Entity oldVehicle = super.bJ();
+	        	ReflectionUtils.setPrivateField(Entity.class, this, "au", null);
+	        	oldVehicle.passengers.remove(this);
+	        }
+
+	        ReflectionUtils.setPrivateField(Entity.class, this, "au", entity);
+	        entity.passengers.clear();
+	        entity.passengers.add(this);
+
+		} catch (Exception ex) {
+			DebugHandler.handleDebugException(ex);
+		}
+	}
+
+	@Override
+	public Object getRawItemStack() {
+		return super.getItemStack();
+	}
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSSlime.java

@@ -0,0 +1,215 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import net.minecraft.server.v1_12_R1.EntityDamageSource;
+import net.minecraft.server.v1_12_R1.EntityPlayer;
+import net.minecraft.server.v1_12_R1.AxisAlignedBB;
+import net.minecraft.server.v1_12_R1.DamageSource;
+import net.minecraft.server.v1_12_R1.Entity;
+import net.minecraft.server.v1_12_R1.EntitySlime;
+import net.minecraft.server.v1_12_R1.NBTTagCompound;
+import net.minecraft.server.v1_12_R1.SoundEffect;
+import net.minecraft.server.v1_12_R1.World;
+
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftEntity;
+import org.bukkit.event.player.PlayerInteractEntityEvent;
+
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSSlime;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftHologramLine;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftTouchSlimeLine;
+import com.gmail.filoghost.holographicdisplays.util.DebugHandler;
+import com.gmail.filoghost.holographicdisplays.util.ReflectionUtils;
+
+public class EntityNMSSlime extends EntitySlime implements NMSSlime {
+
+	private boolean lockTick;
+	private CraftTouchSlimeLine parentPiece;
+	
+	public EntityNMSSlime(World world, CraftTouchSlimeLine parentPiece) {
+		super(world);
+		super.persistent = true;
+		super.collides = false;
+		a(0.0F, 0.0F);
+		setSize(1, false);
+		setInvisible(true);
+		this.parentPiece = parentPiece;
+		forceSetBoundingBox(new NullBoundingBox());
+	}
+	
+	@Override
+	public void a(AxisAlignedBB boundingBox) {
+		// Do not change it!
+	}
+	
+	public void forceSetBoundingBox(AxisAlignedBB boundingBox) {
+		super.a(boundingBox);
+	}
+	
+	@Override
+	public void B_() {
+		
+		// So it won't get removed.
+		ticksLived = 0;
+		
+		if (!lockTick) {
+			super.B_();
+		}
+	}
+	
+	@Override
+	public void b(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+	}
+	
+	@Override
+	public boolean c(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return false;
+	}
+
+	@Override
+	public boolean d(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return false;
+	}
+	
+	@Override
+	public NBTTagCompound save(NBTTagCompound nbttagcompound) {
+		// Do not save NBT.
+		return nbttagcompound;
+	}
+	
+	@Override
+	public void f(NBTTagCompound nbttagcompound) {
+		// Do not load NBT.
+	}
+	
+	@Override
+	public void a(NBTTagCompound nbttagcompound) {
+		// Do not load NBT.
+	}
+	
+	@Override
+	public boolean damageEntity(DamageSource damageSource, float amount) {
+		if (damageSource instanceof EntityDamageSource) {
+			EntityDamageSource entityDamageSource = (EntityDamageSource) damageSource;
+			if (entityDamageSource.getEntity() instanceof EntityPlayer) {
+				Bukkit.getPluginManager().callEvent(new PlayerInteractEntityEvent(((EntityPlayer) entityDamageSource.getEntity()).getBukkitEntity(), getBukkitEntity())); // Bukkit takes care of the exceptions
+			}
+		}
+		return false;
+	}
+	
+	@Override
+	public boolean isInvulnerable(DamageSource source) {
+		/*
+		 * The field Entity.invulnerable is private.
+		 * It's only used while saving NBTTags, but since the entity would be killed
+		 * on chunk unload, we prefer to override isInvulnerable().
+		 */
+	    return true;
+	}
+	
+	@Override
+	public boolean isCollidable() {
+		return false;
+	}
+	
+	@Override
+	public void inactiveTick() {
+		// Check inactive ticks.
+		
+		if (!lockTick) {
+			super.inactiveTick();
+		}
+	}
+
+	@Override
+	public void setCustomName(String customName) {
+		// Locks the custom name.
+	}
+	
+	@Override
+	public void setCustomNameVisible(boolean visible) {
+		// Locks the custom name.
+	}
+	
+	@Override
+	public void a(SoundEffect soundeffect, float f, float f1) {
+	    // Remove sounds.
+	}
+	
+	@Override
+	public void setLockTick(boolean lock) {
+		lockTick = lock;
+	}
+	
+	@Override
+	public void die() {
+		// Prevent being killed.
+	}
+	
+	@Override
+	public CraftEntity getBukkitEntity() {
+		if (super.bukkitEntity == null) {
+			super.bukkitEntity = new CraftNMSSlime(super.world.getServer(), this);
+	    }
+		return super.bukkitEntity;
+	}
+
+	@Override
+	public boolean isDeadNMS() {
+		return super.dead;
+	}
+	
+	@Override
+	public void killEntityNMS() {
+		super.dead = true;
+	}
+	
+	@Override
+	public void setLocationNMS(double x, double y, double z) {
+		super.setPosition(x, y, z);
+	}
+	
+	@Override
+	public int getIdNMS() {
+		return super.getId();
+	}
+	
+	@Override
+	public CraftHologramLine getHologramLine() {
+		return parentPiece;
+	}
+
+	@Override
+	public org.bukkit.entity.Entity getBukkitEntityNMS() {
+		return getBukkitEntity();
+	}
+	
+	@Override
+	public void setPassengerOfNMS(NMSEntityBase vehicleBase) {
+		if (vehicleBase == null || !(vehicleBase instanceof Entity)) {
+			// It should never dismount
+			return;
+		}
+		
+		Entity entity = (Entity) vehicleBase;
+		
+		try {
+			if (super.bJ() != null) {
+	        	Entity oldVehicle = super.bJ();
+	        	ReflectionUtils.setPrivateField(Entity.class, this, "au", null);
+	        	oldVehicle.passengers.remove(this);
+	        }
+
+	        ReflectionUtils.setPrivateField(Entity.class, this, "au", entity);
+	        entity.passengers.clear();
+	        entity.passengers.add(this);
+
+		} catch (Exception ex) {
+			DebugHandler.handleDebugException(ex);
+		}
+	}
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/FancyMessageImpl.java

@@ -0,0 +1,170 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraft.server.v1_12_R1.IChatBaseComponent;
+import net.minecraft.server.v1_12_R1.PacketPlayOutChat;
+
+import org.bukkit.ChatColor;
+
+import com.google.gson.stream.JsonWriter;
+
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.FancyMessage;
+
+public class FancyMessageImpl implements FancyMessage {
+	
+	private List<MessagePart> messageParts;
+	
+	public FancyMessageImpl(String firstPartText) {
+		messageParts = new ArrayList<MessagePart>();
+		messageParts.add(new MessagePart(firstPartText));
+	}
+	
+	@Override
+	public FancyMessageImpl color(ChatColor color) {
+		if (!color.isColor()) {
+			throw new IllegalArgumentException(color.name() + " is not a color");
+		}
+		latest().color = color;
+		return this;
+	}
+	
+	@Override
+	public FancyMessageImpl style(ChatColor... styles) {
+		for (ChatColor style : styles) {
+			if (!style.isFormat()) {
+				throw new IllegalArgumentException(style.name() + " is not a style");
+			}
+		}
+		latest().styles = styles;
+		return this;
+	}
+	
+	@Override
+	public FancyMessageImpl file(String path) {
+		onClick("open_file", path);
+		return this;
+	}
+	
+	@Override
+	public FancyMessageImpl link(String url) {
+		onClick("open_url", url);
+		return this;
+	}
+	
+	@Override
+	public FancyMessageImpl suggest(String command) {
+		onClick("suggest_command", command);
+		return this;
+	}
+	
+	@Override
+	public FancyMessageImpl command(String command) {
+		onClick("run_command", command);
+		return this;
+	}
+	
+	@Override
+	public FancyMessageImpl tooltip(String text) {
+		onHover("show_text", text);
+		return this;
+	}
+
+	@Override
+	public FancyMessageImpl then(Object obj) {
+		messageParts.add(new MessagePart(obj.toString()));
+		return this;
+	}
+	
+	@Override
+	public String toJSONString() {
+		StringWriter stringWriter = new StringWriter();
+		JsonWriter json = new JsonWriter(stringWriter);
+		
+		try {
+			if (messageParts.size() == 1) {
+				latest().writeJson(json);
+			} else {
+				json.beginObject().name("text").value("").name("extra").beginArray();
+				for (MessagePart part : messageParts) {
+					part.writeJson(json);
+				}
+				json.endArray().endObject();
+			}
+			
+		} catch (IOException e) {
+			throw new RuntimeException("invalid message");
+		}
+		return stringWriter.toString();
+	}
+	
+	@Override
+	public void send(Player player) {
+		((CraftPlayer) player).getHandle().playerConnection.sendPacket(new PacketPlayOutChat(IChatBaseComponent.ChatSerializer.a(toJSONString())));
+	}
+	
+	private MessagePart latest() {
+		return messageParts.get(messageParts.size() - 1);
+	}
+	
+	private void onClick(String name, String data) {
+		MessagePart latest = latest();
+		latest.clickActionName = name;
+		latest.clickActionData = data;
+	}
+	
+	private void onHover(String name, String data) {
+		MessagePart latest = latest();
+		latest.hoverActionName = name;
+		latest.hoverActionData = data;
+	}
+	
+	static class MessagePart {
+
+		public ChatColor color = null;
+		public ChatColor[] styles = null;
+		public String clickActionName = null;
+		public String clickActionData = null;
+		public String hoverActionName = null;
+		public String hoverActionData = null;
+		public final String text;
+		
+		public MessagePart(final String text) {
+			this.text = text;
+		}
+		
+		public JsonWriter writeJson(final JsonWriter json) throws IOException {
+			json.beginObject().name("text").value(text);
+			if (color != null) {
+				json.name("color").value(color.name().toLowerCase());
+			}
+			if (styles != null) {
+				for (final ChatColor style : styles) {
+					json.name(style == ChatColor.UNDERLINE ? "underlined" : style.name().toLowerCase()).value(true);
+				}
+			}
+			if (clickActionName != null && clickActionData != null) {
+				json.name("clickEvent")
+					.beginObject()
+						.name("action").value(clickActionName)
+						.name("value").value(clickActionData)
+					.endObject();
+			}
+			if (hoverActionName != null && hoverActionData != null) {
+				json.name("hoverEvent")
+					.beginObject()
+						.name("action").value(hoverActionName)
+						.name("value").value(hoverActionData)
+					.endObject();
+			}
+			return json.endObject();
+		}
+		
+	}
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/NmsManagerImpl.java

@@ -0,0 +1,163 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import java.lang.reflect.Method;
+
+import org.apache.commons.lang.NotImplementedException;
+import org.bukkit.Bukkit;
+import org.bukkit.Chunk;
+import org.bukkit.craftbukkit.v1_12_R1.CraftChunk;
+import org.bukkit.craftbukkit.v1_12_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_12_R1.entity.CraftEntity;
+import org.bukkit.inventory.ItemStack;
+
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.FancyMessage;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSHorse;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSItem;
+import com.gmail.filoghost.holographicdisplays.nms.interfaces.entity.NMSWitherSkull;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftHologramLine;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftItemLine;
+import com.gmail.filoghost.holographicdisplays.object.line.CraftTouchSlimeLine;
+import com.gmail.filoghost.holographicdisplays.util.DebugHandler;
+import com.gmail.filoghost.holographicdisplays.util.ReflectionUtils;
+import com.gmail.filoghost.holographicdisplays.util.Validator;
+import com.gmail.filoghost.holographicdisplays.util.VersionUtils;
+
+import net.minecraft.server.v1_12_R1.Entity;
+import net.minecraft.server.v1_12_R1.EntityTypes;
+import net.minecraft.server.v1_12_R1.MathHelper;
+import net.minecraft.server.v1_12_R1.RegistryID;
+import net.minecraft.server.v1_12_R1.RegistryMaterials;
+import net.minecraft.server.v1_12_R1.World;
+import net.minecraft.server.v1_12_R1.WorldServer;
+
+public class NmsManagerImpl implements NMSManager {
+
+	private Method validateEntityMethod;
+	
+	@Override
+	public void setup() throws Exception {
+		validateEntityMethod = World.class.getDeclaredMethod("b", Entity.class);
+		validateEntityMethod.setAccessible(true);
+		
+		registerCustomEntity(EntityNMSSlime.class, 55);
+	}
+	
+	@SuppressWarnings("unchecked")
+	public void registerCustomEntity(Class<? extends Entity> entityClass, int id) throws Exception {
+		if (VersionUtils.isMCPCOrCauldron()) {
+			// MCPC+ / Cauldron entity registration.
+			throw new UnsupportedOperationException("MCPC, Cauldron and similar softwares are not supported");
+		} else {
+			// Use reflection to get the RegistryID of entities.
+			RegistryID<Class<? extends Entity>> registryID = (RegistryID<Class<? extends Entity>>) ReflectionUtils.getPrivateField(RegistryMaterials.class, EntityTypes.b, "a");
+			Object[] idToClassMap = (Object[]) ReflectionUtils.getPrivateField(RegistryID.class, registryID, "d");
+			
+			// Save the the ID -> entity class mapping before the registration.
+			Object oldValue = idToClassMap[id];
+
+			// Register the entity class.
+			registryID.a(entityClass, id);
+
+			// Restore the ID -> entity class mapping.
+			idToClassMap[id] = oldValue;
+		}
+	}
+
+	@Override
+	public NMSHorse spawnNMSHorse(org.bukkit.World world, double x, double y, double z, CraftHologramLine parentPiece) {
+		throw new NotImplementedException("Method can only be used on 1.7 or lower");
+	}
+	
+	@Override
+	public NMSWitherSkull spawnNMSWitherSkull(org.bukkit.World bukkitWorld, double x, double y, double z, CraftHologramLine parentPiece) {
+		throw new NotImplementedException("Method can only be used on 1.7 or lower");
+	}
+	
+	@Override
+	public NMSItem spawnNMSItem(org.bukkit.World bukkitWorld, double x, double y, double z, CraftItemLine parentPiece, ItemStack stack) {
+		WorldServer nmsWorld = ((CraftWorld) bukkitWorld).getHandle();
+		EntityNMSItem customItem = new EntityNMSItem(nmsWorld, parentPiece);
+		customItem.setLocationNMS(x, y, z);
+		customItem.setItemStackNMS(stack);
+		if (!addEntityToWorld(nmsWorld, customItem)) {
+			DebugHandler.handleSpawnFail(parentPiece);
+		}
+		return customItem;
+	}
+	
+	@Override
+	public EntityNMSSlime spawnNMSSlime(org.bukkit.World bukkitWorld, double x, double y, double z, CraftTouchSlimeLine parentPiece) {
+		WorldServer nmsWorld = ((CraftWorld) bukkitWorld).getHandle();
+		EntityNMSSlime touchSlime = new EntityNMSSlime(nmsWorld, parentPiece);
+		touchSlime.setLocationNMS(x, y, z);
+		if (!addEntityToWorld(nmsWorld, touchSlime)) {
+			DebugHandler.handleSpawnFail(parentPiece);
+		}
+		return touchSlime;
+	}
+	
+	@Override
+	public NMSArmorStand spawnNMSArmorStand(org.bukkit.World world, double x, double y, double z, CraftHologramLine parentPiece) {
+		WorldServer nmsWorld = ((CraftWorld) world).getHandle();
+		EntityNMSArmorStand invisibleArmorStand = new EntityNMSArmorStand(nmsWorld, parentPiece);
+		invisibleArmorStand.setLocationNMS(x, y, z);
+		if (!addEntityToWorld(nmsWorld, invisibleArmorStand)) {
+			DebugHandler.handleSpawnFail(parentPiece);
+		}
+		return invisibleArmorStand;
+	}
+	
+	private boolean addEntityToWorld(WorldServer nmsWorld, Entity nmsEntity) {
+		Validator.isTrue(Bukkit.isPrimaryThread(), "Async entity add");
+		
+        final int chunkX = MathHelper.floor(nmsEntity.locX / 16.0);
+        final int chunkZ = MathHelper.floor(nmsEntity.locZ / 16.0);
+        
+        if (!nmsWorld.getChunkProviderServer().isLoaded(chunkX, chunkZ)) {
+        	// This should never happen
+            nmsEntity.dead = true;
+            return false;
+        }
+        
+        nmsWorld.getChunkAt(chunkX, chunkZ).a(nmsEntity);
+        nmsWorld.entityList.add(nmsEntity);
+        
+        try {
+			validateEntityMethod.invoke(nmsWorld, nmsEntity);
+		} catch (Exception e) {
+			e.printStackTrace();
+			return false;
+		}
+        return true;
+    }
+	
+	@Override
+	public boolean isNMSEntityBase(org.bukkit.entity.Entity bukkitEntity) {
+		return ((CraftEntity) bukkitEntity).getHandle() instanceof NMSEntityBase;
+	}
+
+	@Override
+	public NMSEntityBase getNMSEntityBase(org.bukkit.entity.Entity bukkitEntity) {
+		
+		Entity nmsEntity = ((CraftEntity) bukkitEntity).getHandle();
+		if (nmsEntity instanceof NMSEntityBase) {
+			return ((NMSEntityBase) nmsEntity);
+		}
+
+		return null;
+	}
+
+	@Override
+	public FancyMessage newFancyMessage(String text) {
+		return new FancyMessageImpl(text);
+	}
+
+	@Override
+	public boolean isUnloadUnsure(Chunk bukkitChunk) {
+		return bukkitChunk.getWorld().isChunkInUse(bukkitChunk.getX(), bukkitChunk.getZ()) || !((CraftChunk) bukkitChunk).getHandle().d; // Field probably representing if the chunk is scheduled to be unloaded in ChunkProviderServer
+	}
+	
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/nms/v1_12_R1/NullBoundingBox.java

@@ -0,0 +1,127 @@
+package com.gmail.filoghost.holographicdisplays.nms.v1_12_R1;
+
+import net.minecraft.server.v1_12_R1.AxisAlignedBB;
+import net.minecraft.server.v1_12_R1.BlockPosition;
+import net.minecraft.server.v1_12_R1.MovingObjectPosition;
+import net.minecraft.server.v1_12_R1.Vec3D;
+
+public class NullBoundingBox extends AxisAlignedBB {
+
+	public NullBoundingBox() {
+		super(0, 0, 0, 0, 0, 0);
+	}
+
+	@Override
+	public double a() {
+		return 0.0;
+	}
+
+	@Override
+	public double a(AxisAlignedBB arg0, double arg1) {
+		return 0.0;
+	}
+
+	@Override
+	public AxisAlignedBB a(AxisAlignedBB arg0) {
+		return this;
+	}
+
+	@Override
+	public AxisAlignedBB a(double arg0, double arg1, double arg2) {
+		return this;
+	}
+
+	@Override
+	public MovingObjectPosition b(Vec3D arg0, Vec3D arg1) {
+		return null;
+	}
+
+	@Override
+	public double b(AxisAlignedBB arg0, double arg1) {
+		return 0.0;
+	}
+
+	@Override
+	public double c(AxisAlignedBB arg0, double arg1) {
+		return 0.0;
+	}
+
+	@Override
+	public AxisAlignedBB grow(double arg0, double arg1, double arg2) {
+		return this;
+	}
+
+	@Override
+	public AxisAlignedBB shrink(double arg0) {
+		return this;
+	}
+	
+	@Override
+	public AxisAlignedBB a(BlockPosition arg0) {
+		return this;
+	}
+
+	@Override
+	public boolean a(double arg0, double arg1, double arg2, double arg3, double arg4, double arg5) {
+		return false;
+	}
+
+	@Override
+	public boolean b(Vec3D arg0) {
+		return false;
+	}
+
+	@Override
+	public boolean c(Vec3D arg0) {
+		return false;
+	}
+
+	@Override
+	public boolean d(Vec3D arg0) {
+		return false;
+	}
+
+	@Override
+	public AxisAlignedBB e(double arg0) {
+		return this;
+	}
+	
+	@Override
+	public AxisAlignedBB g(double arg0) {
+		return this;
+	}
+
+	@Override
+	public AxisAlignedBB a(Vec3D arg0) {
+		return this;
+	}
+
+	@Override
+	public AxisAlignedBB b(AxisAlignedBB arg0) {
+		return this;
+	}
+
+	@Override
+	public AxisAlignedBB b(double arg0, double arg1, double arg2) {
+		return this;
+	}
+
+	@Override
+	public boolean c(AxisAlignedBB arg0) {
+		return false;
+	}
+
+	@Override
+	public AxisAlignedBB d(double arg0, double arg1, double arg2) {
+		return this;
+	}
+
+	@Override
+	public boolean e(Vec3D arg0) {
+		return false;
+	}
+	
+	
+	
+
+}

HolographicDisplays/Plugin/com/gmail/filoghost/holographicdisplays/util/MinecraftVersion.java

@@ -22,7 +22,9 @@ public class MinecraftVersion {
 		// Since 1.10 there is a difference in the entity metadata packet index for items.
 		v1_10 = new MinecraftVersion(4),
 	
-		v1_11 = new MinecraftVersion(5);
+		v1_11 = new MinecraftVersion(5),
+		
+		v1_12 = new MinecraftVersion(6);
 
 	private int value;
 	

HolographicDisplays/plugin.yml

@@ -1,6 +1,6 @@
 name: HolographicDisplays
 main: com.gmail.filoghost.holographicdisplays.HolographicDisplays
-version: 2.2.5
+version: 2.2.6
 
 softdepend: [Multiverse-Core, MultiWorld, My Worlds, My_Worlds, ProtocolLib]