Initial refactoring on hologram objects

plugin/src/main/java/me/filoghost/holographicdisplays/DefaultBackendAPI.java

@@ -10,7 +10,7 @@ import me.filoghost.holographicdisplays.api.Hologram;
 import me.filoghost.holographicdisplays.api.internal.BackendAPI;
 import me.filoghost.holographicdisplays.api.placeholder.PlaceholderReplacer;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import me.filoghost.holographicdisplays.object.APIHologramManager;
+import me.filoghost.holographicdisplays.object.api.APIHologramManager;
 import me.filoghost.holographicdisplays.placeholder.Placeholder;
 import me.filoghost.holographicdisplays.placeholder.PlaceholdersRegister;
 import org.bukkit.Bukkit;

plugin/src/main/java/me/filoghost/holographicdisplays/HolographicDisplays.java

@@ -29,11 +29,11 @@ import me.filoghost.holographicdisplays.listener.UpdateNotificationListener;
 import me.filoghost.holographicdisplays.nms.interfaces.ItemPickupManager;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
 import me.filoghost.holographicdisplays.nms.interfaces.PacketController;
-import me.filoghost.holographicdisplays.object.APIHologram;
+import me.filoghost.holographicdisplays.object.api.APIHologram;
-import me.filoghost.holographicdisplays.object.APIHologramManager;
+import me.filoghost.holographicdisplays.object.api.APIHologramManager;
-import me.filoghost.holographicdisplays.object.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import me.filoghost.holographicdisplays.placeholder.AnimationsRegister;
 import me.filoghost.holographicdisplays.placeholder.PlaceholdersManager;
 import me.filoghost.holographicdisplays.task.BungeeCleanupTask;
@@ -175,7 +175,7 @@ public class HolographicDisplays extends FCommonsPlugin implements PacketControl
 
         // Then trigger a refresh for all of them
         for (BaseHologram hologram : internalHologramManager.getHolograms()) {
-            hologram.refreshAll();
+            hologram.refresh();
         }
     }
 

plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/PacketListener.java

@@ -20,8 +20,8 @@ import me.filoghost.holographicdisplays.bridge.protocollib.packet.WrapperPlaySer
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseHologramLine;
-import me.filoghost.holographicdisplays.object.line.TextLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseTextLine;
 import me.filoghost.holographicdisplays.placeholder.RelativePlaceholder;
 import me.filoghost.holographicdisplays.util.NMSVersion;
 import org.bukkit.World;
@@ -67,7 +67,7 @@ class PacketListener extends PacketAdapter {
         // Spawn entity packet
         if (packet.getType() == PacketType.Play.Server.SPAWN_ENTITY_LIVING) {
             WrapperPlayServerSpawnEntityLiving spawnEntityPacket = new WrapperPlayServerSpawnEntityLiving(packet);
-            HologramLineImpl hologramLine = getHologramLine(event, spawnEntityPacket);
+            BaseHologramLine hologramLine = getHologramLine(event, spawnEntityPacket);
 
             if (hologramLine == null) {
                 return;
@@ -83,10 +83,10 @@ class PacketListener extends PacketAdapter {
                 return;
             }
 
-            if (!(hologramLine instanceof TextLineImpl)) {
+            if (!(hologramLine instanceof BaseTextLine)) {
                 return;
             }
-            TextLineImpl textLine = (TextLineImpl) hologramLine;
+            BaseTextLine textLine = (BaseTextLine) hologramLine;
 
             if (!hologramLine.getParent().isAllowPlaceholders() || !textLine.hasRelativePlaceholders()) {
                 return;
@@ -104,7 +104,7 @@ class PacketListener extends PacketAdapter {
 
         } else if (packet.getType() == PacketType.Play.Server.SPAWN_ENTITY) {
             WrapperPlayServerSpawnEntity spawnEntityPacket = new WrapperPlayServerSpawnEntity(packet);
-            HologramLineImpl hologramLine = getHologramLine(event, spawnEntityPacket);
+            BaseHologramLine hologramLine = getHologramLine(event, spawnEntityPacket);
 
             if (hologramLine == null) {
                 return;
@@ -117,7 +117,7 @@ class PacketListener extends PacketAdapter {
 
         } else if (packet.getType() == PacketType.Play.Server.ENTITY_METADATA) {
             WrapperPlayServerEntityMetadata entityMetadataPacket = new WrapperPlayServerEntityMetadata(packet);
-            HologramLineImpl hologramLine = getHologramLine(event, entityMetadataPacket);
+            BaseHologramLine hologramLine = getHologramLine(event, entityMetadataPacket);
 
             if (hologramLine == null) {
                 return;
@@ -128,10 +128,10 @@ class PacketListener extends PacketAdapter {
                 return;
             }
             
-            if (!(hologramLine instanceof TextLineImpl)) {
+            if (!(hologramLine instanceof BaseTextLine)) {
                 return;
             }
-            TextLineImpl textLine = (TextLineImpl) hologramLine;
+            BaseTextLine textLine = (BaseTextLine) hologramLine;
 
             if (!hologramLine.getParent().isAllowPlaceholders() || !textLine.hasRelativePlaceholders()) {
                 return;
@@ -183,11 +183,11 @@ class PacketListener extends PacketAdapter {
         return true;
     }    
     
-    private HologramLineImpl getHologramLine(PacketEvent packetEvent, EntityRelatedPacketWrapper packetWrapper) {
+    private BaseHologramLine getHologramLine(PacketEvent packetEvent, EntityRelatedPacketWrapper packetWrapper) {
         return getHologramLine(packetEvent.getPlayer().getWorld(), packetWrapper.getEntityID());
     }
     
-    private HologramLineImpl getHologramLine(World world, int entityID) {
+    private BaseHologramLine getHologramLine(World world, int entityID) {
         if (entityID < 0) {
             return null;
         }
@@ -197,7 +197,7 @@ class PacketListener extends PacketAdapter {
             return null; // Entity not existing or not related to holograms.
         }
         
-        return (HologramLineImpl) nmsEntity.getHologramLine();
+        return (BaseHologramLine) nmsEntity.getHologramLine();
     }
 
 }

plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/PacketSender.java

@@ -18,12 +18,11 @@ import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSItem;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSSlime;
-import me.filoghost.holographicdisplays.object.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseItemLine;
-import me.filoghost.holographicdisplays.object.line.ItemLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseTextLine;
-import me.filoghost.holographicdisplays.object.line.TextLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseTouchableLine;
-import me.filoghost.holographicdisplays.object.line.TouchSlimeLineImpl;
+import me.filoghost.holographicdisplays.object.base.SpawnableHologramLine;
-import me.filoghost.holographicdisplays.object.line.TouchableLineImpl;
 import me.filoghost.holographicdisplays.util.NMSVersion;
 import org.bukkit.entity.Player;
 
@@ -40,12 +39,8 @@ class PacketSender {
 
     public void sendDestroyEntitiesPacket(Player player, BaseHologram hologram) {
         List<Integer> ids = new ArrayList<>();
-        for (HologramLineImpl line : hologram.getLinesUnsafe()) {
+        for (SpawnableHologramLine line : hologram.getLinesUnsafe()) { 
-            if (line.isSpawned()) {
+            line.collectEntityIDs(ids);
-                for (int id : line.getEntitiesIDs()) {
-                    ids.add(id);
-                }
-            }
         }
 
         if (!ids.isEmpty()) {
@@ -54,45 +49,39 @@ class PacketSender {
     }
 
     public void sendCreateEntitiesPacket(Player player, BaseHologram hologram) {
-        for (HologramLineImpl line : hologram.getLinesUnsafe()) {
+        for (SpawnableHologramLine line : hologram.getLinesUnsafe()) {
             sendCreateEntitiesPacket(player, line);
         }
     }
 
-    private void sendCreateEntitiesPacket(Player player, HologramLineImpl line) {
+    private void sendCreateEntitiesPacket(Player player, SpawnableHologramLine line) {
-        if (!line.isSpawned()) {
+        if (line instanceof BaseTextLine) {
-            return;
+            BaseTextLine textLine = (BaseTextLine) line;
-        }
             
-        TouchableLineImpl touchableLine;
+            if (textLine.getNMSNameable() != null) {
+                sendSpawnArmorStandPacket(player, textLine.getNMSNameable());
+            }
 
-        if (line instanceof TextLineImpl) {
+        } else if (line instanceof BaseItemLine) {
-            TextLineImpl textLine = (TextLineImpl) line;
+            BaseItemLine itemLine = (BaseItemLine) line;
-            touchableLine = textLine;
-
-            sendSpawnArmorStandPacket(player, (NMSArmorStand) textLine.getNmsNameable());
-
-        } else if (line instanceof ItemLineImpl) {
-            ItemLineImpl itemLine = (ItemLineImpl) line;
-            touchableLine = itemLine;
-
-            sendSpawnArmorStandPacket(player, (NMSArmorStand) itemLine.getNmsVehicle());
-            sendSpawnItemPacket(player, itemLine.getNmsItem());
-            sendVehicleAttachPacket(player, itemLine.getNmsVehicle(), itemLine.getNmsItem());
-            sendItemMetadataPacket(player, itemLine.getNmsItem());
 
+            if (itemLine.getNMSItem() != null && itemLine.getNMSVehicle() != null) {
+                sendSpawnArmorStandPacket(player, itemLine.getNMSVehicle());
+                sendSpawnItemPacket(player, itemLine.getNMSItem());
+                sendVehicleAttachPacket(player, itemLine.getNMSVehicle(), itemLine.getNMSItem());
+                sendItemMetadataPacket(player, itemLine.getNMSItem());
+            }
         } else {
             throw new IllegalArgumentException("Unexpected hologram line type: " + line.getClass().getName());
         }
 
-        if (touchableLine.getTouchSlime() != null) {
+        // All sub-types of lines are touchable, no need to check instance type
-            TouchSlimeLineImpl touchSlime = touchableLine.getTouchSlime();
+        BaseTouchableLine touchableLine = (BaseTouchableLine) line;
 
-            if (touchSlime.isSpawned()) {
+        if (touchableLine.getNMSSlime() != null && touchableLine.getNMSVehicle() != null) {
-                sendSpawnArmorStandPacket(player, (NMSArmorStand) touchSlime.getNmsVehicle());
+            sendSpawnArmorStandPacket(player, touchableLine.getNMSVehicle());
-                sendSpawnSlimePacket(player, touchSlime.getNmsSlime());
+            sendSpawnSlimePacket(player, touchableLine.getNMSSlime());
-                sendVehicleAttachPacket(player, touchSlime.getNmsVehicle(), touchSlime.getNmsSlime());
+            sendVehicleAttachPacket(player, touchableLine.getNMSVehicle(), touchableLine.getNMSSlime());
-            }
         }
     }
     

plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/ProtocolLibHook.java

@@ -8,7 +8,7 @@ package me.filoghost.holographicdisplays.bridge.protocollib;
 import com.google.common.base.Preconditions;
 import me.filoghost.fcommons.logging.Log;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import me.filoghost.holographicdisplays.object.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
 import me.filoghost.holographicdisplays.util.VersionUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;

plugin/src/main/java/me/filoghost/holographicdisplays/commands/HologramCommandManager.java

@@ -35,8 +35,8 @@ import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.disk.Configuration;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.chat.ClickEvent;
 import net.md_5.bungee.api.chat.ComponentBuilder;

plugin/src/main/java/me/filoghost/holographicdisplays/commands/HologramCommandValidate.java

@@ -10,9 +10,9 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.HologramLineParser;
 import me.filoghost.holographicdisplays.disk.HologramLoadException;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import me.filoghost.holographicdisplays.util.FileUtils;
 
 import java.nio.file.Files;
@@ -20,7 +20,7 @@ import java.nio.file.Path;
 
 public class HologramCommandValidate {
     
-    public static HologramLineImpl parseHologramLine(InternalHologram hologram, String serializedLine, boolean validateMaterial) throws CommandException {
+    public static InternalHologramLine parseHologramLine(InternalHologram hologram, String serializedLine, boolean validateMaterial) throws CommandException {
         try {
             return HologramLineParser.parseLine(hologram, serializedLine, validateMaterial);
         } catch (HologramLoadException e) {

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/AddlineCommand.java

@@ -13,9 +13,9 @@ import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.InternalHologramEditEvent;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 
@@ -41,9 +41,9 @@ public class AddlineCommand extends LineEditingCommand implements QuickEditComma
         InternalHologram hologram = HologramCommandValidate.getNamedHologram(internalHologramManager, args[0]);
         String serializedLine = Utils.join(args, " ", 1, args.length);
         
-        HologramLineImpl line = HologramCommandValidate.parseHologramLine(hologram, serializedLine, true);
+        InternalHologramLine line = HologramCommandValidate.parseHologramLine(hologram, serializedLine, true);
         hologram.getLinesUnsafe().add(line);
-        hologram.refreshAll();
+        hologram.refresh();
 
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/AlignCommand.java

@@ -12,8 +12,8 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Location;
 import org.bukkit.command.CommandSender;
 
@@ -55,9 +55,7 @@ public class AlignCommand extends HologramSubCommand {
             throw new CommandException("You must specify either X, Y, Z or XZ, " + axis + " is not a valid axis.");
         }
 
-        hologram.teleport(loc.getWorld(), loc.getX(), loc.getY(), loc.getZ());
+        hologram.teleport(loc);
-        hologram.despawnEntities();
-        hologram.refreshAll();
             
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/CopyCommand.java

@@ -11,9 +11,9 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.command.CommandSender;
 
 public class CopyCommand extends HologramSubCommand {
@@ -37,12 +37,12 @@ public class CopyCommand extends HologramSubCommand {
         InternalHologram toHologram = HologramCommandValidate.getNamedHologram(internalHologramManager, args[1]);
         
         toHologram.clearLines();
-        for (HologramLineImpl line : fromHologram.getLinesUnsafe()) {
+        for (InternalHologramLine line : fromHologram.getLinesUnsafe()) {
-            HologramLineImpl clonedLine = HologramCommandValidate.parseHologramLine(toHologram, line.getSerializedConfigValue(), false);
+            InternalHologramLine clonedLine = HologramCommandValidate.parseHologramLine(toHologram, line.getSerializedConfigValue(), false);
             toHologram.getLinesUnsafe().add(clonedLine);
         }
         
-        toHologram.refreshAll();
+        toHologram.refresh();
 
         configManager.getHologramDatabase().addOrUpdate(toHologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/CreateCommand.java

@@ -13,9 +13,9 @@ import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Location;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
@@ -63,14 +63,14 @@ public class CreateCommand extends HologramSubCommand {
             String text = Utils.join(args, " ", 1, args.length);
             CommandValidate.check(!text.equalsIgnoreCase("{empty}"), "The first line should not be empty.");
             
-            HologramLineImpl line = HologramCommandValidate.parseHologramLine(hologram, text, true);
+            InternalHologramLine line = HologramCommandValidate.parseHologramLine(hologram, text, true);
             hologram.getLinesUnsafe().add(line);
             player.sendMessage(Colors.SECONDARY_SHADOW + "(Change the lines with /" + context.getRootLabel() + " edit " + hologram.getName() + ")");
         } else {
             hologram.appendTextLine("Default hologram. Change it with " + Colors.PRIMARY + "/" + context.getRootLabel() + " edit " + hologram.getName());
         }
         
-        hologram.refreshAll();
+        hologram.refresh();
 
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/DebugCommand.java

@@ -11,8 +11,8 @@ import me.filoghost.holographicdisplays.api.Hologram;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
-import me.filoghost.holographicdisplays.object.APIHologram;
+import me.filoghost.holographicdisplays.object.api.APIHologram;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
 import org.bukkit.Bukkit;
 import org.bukkit.Chunk;
 import org.bukkit.World;

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/DeleteCommand.java

@@ -11,8 +11,8 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.command.CommandSender;
 
 public class DeleteCommand extends HologramSubCommand {
@@ -34,7 +34,7 @@ public class DeleteCommand extends HologramSubCommand {
     public void execute(CommandSender sender, String[] args, SubCommandContext context) throws CommandException {
         InternalHologram hologram = HologramCommandValidate.getNamedHologram(internalHologramManager, args[0]);
         
-        hologram.delete();
+        internalHologramManager.deleteHologram(hologram);
 
         configManager.getHologramDatabase().removeHologram(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/EditCommand.java

@@ -12,8 +12,8 @@ import me.filoghost.holographicdisplays.commands.HologramCommandManager;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.chat.ClickEvent;
 import net.md_5.bungee.api.chat.ComponentBuilder;

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/InfoCommand.java

@@ -11,9 +11,9 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandManager;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.command.CommandSender;
 
 public class InfoCommand extends LineEditingCommand implements QuickEditCommand {
@@ -39,7 +39,7 @@ public class InfoCommand extends LineEditingCommand implements QuickEditCommand
         Messages.sendTitle(sender, "Lines of the hologram '" + hologram.getName() + "'");
         int index = 0;
         
-        for (HologramLineImpl line : hologram.getLinesUnsafe()) {
+        for (InternalHologramLine line : hologram.getLinesUnsafe()) {
             sender.sendMessage(Colors.SECONDARY + Colors.BOLD + (++index) + Colors.SECONDARY_SHADOW + ". " + Colors.SECONDARY + line.getSerializedConfigValue());
         }
         commandManager.sendQuickEditCommands(context, hologram);

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/InsertlineCommand.java

@@ -15,9 +15,9 @@ import me.filoghost.holographicdisplays.commands.Messages;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.InternalHologramEditEvent;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 
@@ -51,9 +51,9 @@ public class InsertlineCommand extends LineEditingCommand implements QuickEditCo
         
         CommandValidate.check(insertAfter >= 0 && insertAfter <= oldLinesAmount, "The number must be between 0 and " + hologram.size() + "(amount of lines of the hologram).");
 
-        HologramLineImpl line = HologramCommandValidate.parseHologramLine(hologram, serializedLine, true);
+        InternalHologramLine line = HologramCommandValidate.parseHologramLine(hologram, serializedLine, true);
         hologram.getLinesUnsafe().add(insertAfter, line);
-        hologram.refreshAll();
+        hologram.refresh();
             
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/ListCommand.java

@@ -11,8 +11,8 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.command.CommandSender;
 
 import java.util.List;

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/MovehereCommand.java

@@ -12,8 +12,8 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Location;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
@@ -39,9 +39,7 @@ public class MovehereCommand extends HologramSubCommand {
         Player player = CommandValidate.getPlayerSender(sender);
         InternalHologram hologram = HologramCommandValidate.getNamedHologram(internalHologramManager, args[0]);
         
-        hologram.teleport(player.getWorld(), player.getLocation().getX(), player.getLocation().getY(), player.getLocation().getZ());
+        hologram.teleport(player.getLocation());
-        hologram.despawnEntities();
-        hologram.refreshAll();
         
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/NearCommand.java

@@ -11,8 +11,8 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.World;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
@@ -44,7 +44,7 @@ public class NearCommand extends HologramSubCommand {
         List<InternalHologram> nearHolograms = new ArrayList<>();
         
         for (InternalHologram hologram : internalHologramManager.getHolograms()) {
-            if (hologram.getLocation().getWorld().equals(world) && hologram.getLocation().distanceSquared(player.getLocation()) <= radiusSquared) {
+            if (hologram.getWorld().equals(world) && hologram.getLocation().distanceSquared(player.getLocation()) <= radiusSquared) {
                 nearHolograms.add(hologram);
             }
         }

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/ReadimageCommand.java

@@ -19,9 +19,9 @@ import me.filoghost.holographicdisplays.image.ImageMessage;
 import me.filoghost.holographicdisplays.image.ImageReadException;
 import me.filoghost.holographicdisplays.image.ImageReader;
 import me.filoghost.holographicdisplays.image.ImageTooWideException;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
-import me.filoghost.holographicdisplays.object.line.TextLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalTextLine;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
@@ -114,11 +114,10 @@ public class ReadimageCommand extends LineEditingCommand {
                 hologram.clearLines();
             }
             for (String newLine : newLines) {
-                TextLineImpl line = new TextLineImpl(hologram, newLine);
+                InternalTextLine line = new InternalTextLine(hologram, newLine, newLine);
-                line.setSerializedConfigValue(newLine);
                 hologram.getLinesUnsafe().add(line);
             }
-            hologram.refreshAll();
+            hologram.refresh();
             
             if (newLines.length < 5) {
                 Messages.sendTip(sender, "The image has a very low height. You can increase it by increasing the width, it will scale automatically.");

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/ReadtextCommand.java

@@ -15,9 +15,9 @@ import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.disk.HologramLineParser;
 import me.filoghost.holographicdisplays.disk.HologramLoadException;
 import me.filoghost.holographicdisplays.event.InternalHologramEditEvent;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import me.filoghost.holographicdisplays.util.FileUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -73,10 +73,10 @@ public class ReadtextCommand extends LineEditingCommand {
                 linesAmount = 40;
             }
             
-            List<HologramLineImpl> linesToAdd = new ArrayList<>();
+            List<InternalHologramLine> linesToAdd = new ArrayList<>();
             for (int i = 0; i < linesAmount; i++) {
                 try {
-                    HologramLineImpl line = HologramLineParser.parseLine(hologram, serializedLines.get(i), true);
+                    InternalHologramLine line = HologramLineParser.parseLine(hologram, serializedLines.get(i), true);
                     linesToAdd.add(line);
                 } catch (HologramLoadException e) {
                     throw new CommandException("Error at line " + (i + 1) + ": " + e.getMessage());
@@ -85,7 +85,7 @@ public class ReadtextCommand extends LineEditingCommand {
             
             hologram.clearLines();
             hologram.getLinesUnsafe().addAll(linesToAdd);
-            hologram.refreshAll();
+            hologram.refresh();
 
             configManager.getHologramDatabase().addOrUpdate(hologram);
             configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/RemovelineCommand.java

@@ -13,8 +13,8 @@ import me.filoghost.holographicdisplays.commands.HologramCommandManager;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.InternalHologramEditEvent;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 
@@ -47,7 +47,7 @@ public class RemovelineCommand extends LineEditingCommand implements QuickEditCo
         CommandValidate.check(hologram.size() > 1, "The hologram should have at least 1 line. If you want to delete it, use /" + context.getRootLabel() + " delete.");
 
         hologram.removeLine(index);
-        hologram.refreshAll();
+        hologram.refresh();
         
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/SetlineCommand.java

@@ -14,9 +14,9 @@ import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.InternalHologramEditEvent;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 
@@ -46,11 +46,11 @@ public class SetlineCommand extends LineEditingCommand implements QuickEditComma
         CommandValidate.check(lineNumber >= 1 && lineNumber <= hologram.size(), "The line number must be between 1 and " + hologram.size() + ".");
         int index = lineNumber - 1;
         
-        HologramLineImpl line = HologramCommandValidate.parseHologramLine(hologram, serializedLine, true);
+        InternalHologramLine line = HologramCommandValidate.parseHologramLine(hologram, serializedLine, true);
 
-        hologram.getLinesUnsafe().get(index).despawn();
+        InternalHologramLine prevLine = hologram.getLinesUnsafe().set(index, line);
-        hologram.getLinesUnsafe().set(index, line);
+        prevLine.despawn();
-        hologram.refreshAll();
+        hologram.refresh();
 
         configManager.getHologramDatabase().addOrUpdate(hologram);
         configManager.saveHologramDatabase();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/TeleportCommand.java

@@ -11,8 +11,8 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Location;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramConfig.java

@@ -7,9 +7,9 @@ package me.filoghost.holographicdisplays.disk;
 
 import me.filoghost.fcommons.Strings;
 import me.filoghost.fcommons.config.ConfigSection;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.World;
@@ -38,7 +38,7 @@ public class HologramConfig {
     public HologramConfig(InternalHologram hologram) {
         this.name = hologram.getName();
         this.serializedLines = new ArrayList<>();
-        for (HologramLineImpl line : hologram.getLinesUnsafe()) {
+        for (InternalHologramLine line : hologram.getLinesUnsafe()) {
             serializedLines.add(line.getSerializedConfigValue());
         }
 
@@ -65,7 +65,7 @@ public class HologramConfig {
 
         for (String serializedLine : serializedLines) {
             try {
-                HologramLineImpl line = HologramLineParser.parseLine(hologram, serializedLine, false);
+                InternalHologramLine line = HologramLineParser.parseLine(hologram, serializedLine, false);
                 hologram.getLinesUnsafe().add(line);
             } catch (HologramLoadException e) {
                 // Rethrow with more details

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramDatabase.java

@@ -7,7 +7,7 @@ package me.filoghost.holographicdisplays.disk;
 
 import me.filoghost.fcommons.config.Config;
 import me.filoghost.fcommons.config.ConfigSection;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
 
 import java.util.Collection;
 import java.util.LinkedHashMap;

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParser.java

@@ -9,10 +9,10 @@ import me.filoghost.fcommons.MaterialsHelper;
 import me.filoghost.fcommons.Strings;
 import me.filoghost.holographicdisplays.nbt.parser.MojangsonParseException;
 import me.filoghost.holographicdisplays.nbt.parser.MojangsonParser;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramLine;
-import me.filoghost.holographicdisplays.object.line.ItemLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalItemLine;
-import me.filoghost.holographicdisplays.object.line.TextLineImpl;
+import me.filoghost.holographicdisplays.object.internal.InternalTextLine;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
@@ -21,23 +21,22 @@ public class HologramLineParser {
 
     private static final String ICON_PREFIX = "icon:";
 
-    public static HologramLineImpl parseLine(InternalHologram hologram, String serializedLine, boolean checkMaterialValidity) throws HologramLoadException {
+    public static InternalHologramLine parseLine(InternalHologram hologram, String serializedLine, boolean checkMaterialValidity) throws HologramLoadException {
-        HologramLineImpl hologramLine;
+        InternalHologramLine hologramLine;
         
         if (serializedLine.toLowerCase().startsWith(ICON_PREFIX)) {
             String serializedIcon = serializedLine.substring(ICON_PREFIX.length());
             ItemStack icon = parseItemStack(serializedIcon, checkMaterialValidity);
-            hologramLine = new ItemLineImpl(hologram, icon);
+            hologramLine = new InternalItemLine(hologram, icon, serializedLine);
             
         } else {
             if (serializedLine.trim().equalsIgnoreCase("{empty}")) {
-                hologramLine = new TextLineImpl(hologram, "");
+                hologramLine = new InternalTextLine(hologram, "", serializedLine);
             } else {
-                hologramLine = new TextLineImpl(hologram, StringConverter.toReadableFormat(serializedLine));
+                hologramLine = new InternalTextLine(hologram, StringConverter.toReadableFormat(serializedLine), serializedLine);
             }
         }
         
-        hologramLine.setSerializedConfigValue(serializedLine);
         return hologramLine;
     }
     

plugin/src/main/java/me/filoghost/holographicdisplays/event/InternalHologramEditEvent.java

@@ -5,7 +5,7 @@
  */
 package me.filoghost.holographicdisplays.event;
 
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
 import org.bukkit.event.Event;
 import org.bukkit.event.HandlerList;
 

plugin/src/main/java/me/filoghost/holographicdisplays/listener/ChunkListener.java

@@ -2,9 +2,9 @@ package me.filoghost.holographicdisplays.listener;
 
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
-import me.filoghost.holographicdisplays.object.APIHologramManager;
+import me.filoghost.holographicdisplays.object.api.APIHologramManager;
-import me.filoghost.holographicdisplays.object.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 import me.filoghost.holographicdisplays.util.SchedulerUtils;
 import org.bukkit.Chunk;
 import org.bukkit.entity.Entity;

plugin/src/main/java/me/filoghost/holographicdisplays/listener/MainListener.java

@@ -9,8 +9,8 @@ import me.filoghost.fcommons.logging.Log;
 import me.filoghost.holographicdisplays.HolographicDisplays;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
-import me.filoghost.holographicdisplays.object.APIHologram;
+import me.filoghost.holographicdisplays.object.api.APIHologram;
-import me.filoghost.holographicdisplays.object.line.TouchSlimeLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseTouchableLine;
 import org.bukkit.GameMode;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Player;
@@ -46,12 +46,12 @@ public class MainListener implements Listener {
         }
         
         NMSEntityBase entityBase = nmsManager.getNMSEntityBase(event.getRightClicked());
-        if (entityBase == null || !(entityBase.getHologramLine() instanceof TouchSlimeLineImpl)) {
+        if (entityBase == null || !(entityBase.getHologramLine() instanceof BaseTouchableLine)) {
             return;
         }
         
-        TouchSlimeLineImpl touchSlime = (TouchSlimeLineImpl) entityBase.getHologramLine();
+        BaseTouchableLine touchableLine = (BaseTouchableLine) entityBase.getHologramLine();
-        if (touchSlime.getTouchablePiece().getTouchHandler() == null || !touchSlime.getParent().getVisibilityManager().isVisibleTo(clicker)) {
+        if (touchableLine.getTouchHandler() == null || !touchableLine.getParent().getVisibilityManager().isVisibleTo(clicker)) {
             return;
         }
         
@@ -63,9 +63,9 @@ public class MainListener implements Listener {
         anticlickSpam.put(event.getPlayer(), System.currentTimeMillis());
         
         try {
-            touchSlime.getTouchablePiece().getTouchHandler().onTouch(event.getPlayer());
+            touchableLine.getTouchHandler().onTouch(event.getPlayer());
         } catch (Throwable t) {
-            Plugin plugin = touchSlime.getParent() instanceof APIHologram ? ((APIHologram) touchSlime.getParent()).getOwner() : HolographicDisplays.getInstance();
+            Plugin plugin = touchableLine.getParent() instanceof APIHologram ? ((APIHologram) touchableLine.getParent()).getOwner() : HolographicDisplays.getInstance();
             Log.warning("The plugin " + plugin.getName() + " generated an exception when the player " + event.getPlayer().getName() + " touched a hologram.", t);
         }
     }

plugin/src/main/java/me/filoghost/holographicdisplays/object/APIHologram.java

@@ -1,34 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object;
-
-import me.filoghost.fcommons.Preconditions;
-import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import org.bukkit.Location;
-import org.bukkit.plugin.Plugin;
-
-public class APIHologram extends BaseHologram {
-    
-    private final Plugin plugin;
-    private final APIHologramManager apiHologramManager;
-
-    protected APIHologram(Location source, Plugin plugin, NMSManager nmsManager, APIHologramManager apiHologramManager) {
-        super(source, nmsManager);
-        Preconditions.notNull(plugin, "plugin");
-        this.plugin = plugin;
-        this.apiHologramManager = apiHologramManager;
-    }
-    
-    public Plugin getOwner() {
-        return plugin;
-    }
-    
-    @Override
-    public void delete() {
-        apiHologramManager.deleteHologram(this);
-    }
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/BaseHologram.java

@@ -1,354 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object;
-
-import me.filoghost.fcommons.Preconditions;
-import me.filoghost.holographicdisplays.api.Hologram;
-import me.filoghost.holographicdisplays.api.VisibilityManager;
-import me.filoghost.holographicdisplays.api.line.HologramLine;
-import me.filoghost.holographicdisplays.api.line.ItemLine;
-import me.filoghost.holographicdisplays.api.line.TextLine;
-import me.filoghost.holographicdisplays.common.Utils;
-import me.filoghost.holographicdisplays.disk.Configuration;
-import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import me.filoghost.holographicdisplays.object.line.HologramLineImpl;
-import me.filoghost.holographicdisplays.object.line.ItemLineImpl;
-import me.filoghost.holographicdisplays.object.line.TextLineImpl;
-import me.filoghost.holographicdisplays.placeholder.PlaceholdersManager;
-import org.bukkit.Chunk;
-import org.bukkit.Location;
-import org.bukkit.World;
-import org.bukkit.inventory.ItemStack;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public abstract class BaseHologram implements Hologram {
-    
-    private final NMSManager nmsManager;
-    
-    // Position variables.
-    private World world;
-    private double x, y, z;
-    private int chunkX, chunkZ;
-    
-    // The entities that represent lines.
-    private final List<HologramLineImpl> lines;
-    
-    private final VisibilityManager visibilityManager;
-    private boolean allowPlaceholders;
-    private final long creationTimestamp;
-    private boolean deleted;
-    
-    public BaseHologram(Location location, NMSManager nmsManager) {
-        Preconditions.notNull(location, "location");
-        setLocation(location.getWorld(), location.getX(), location.getY(), location.getZ());
-
-        this.nmsManager = nmsManager;
-        this.lines = new ArrayList<>();
-        this.creationTimestamp = System.currentTimeMillis();
-        this.visibilityManager = new VisibilityManagerImpl(this);
-        
-        this.allowPlaceholders = false;
-    }
-    
-    public boolean isInChunk(Chunk chunk) {
-        return chunk.getWorld() == world && chunk.getX() == chunkX && chunk.getZ() == chunkZ;
-    }
-    
-    @Override
-    public World getWorld() {
-        return world;
-    }
-    
-    @Override
-    public double getX() {
-        return x;
-    }
-    
-    @Override
-    public double getY() {
-        return y;
-    }
-    
-    @Override
-    public double getZ() {
-        return z;
-    }
-    
-    @Override
-    public Location getLocation() {
-        return new Location(world, x, y, z);
-    }
-    
-    private void setLocation(World world, double x, double y, double z) {
-        Preconditions.notNull(world, "world");
-        
-        this.world = world;
-        this.x = x;
-        this.y = y;
-        this.z = z;
-        chunkX = Utils.floor(x) >> 4;
-        chunkZ = Utils.floor(z) >> 4;
-    }
-    
-    @Override
-    public boolean isDeleted() {
-        return deleted;
-    }
-    
-    public void setDeleted() {
-        if (!deleted) {
-            deleted = true;
-            clearLines();
-        }
-    }
-    
-    public List<HologramLineImpl> getLinesUnsafe() {
-        return lines;
-    }
-    
-    @Override
-    public HologramLine getLine(int index) {
-        return lines.get(index);
-    }
-    
-    @Override
-    public TextLine appendTextLine(String text) {
-        checkState();
-
-        TextLineImpl line = new TextLineImpl(this, text);
-        lines.add(line);
-        refreshSingleLines();
-        return line;
-    }
-    
-    @Override
-    public ItemLine appendItemLine(ItemStack itemStack) {
-        checkState();
-        Preconditions.notNull(itemStack, "itemStack");
-        
-        ItemLineImpl line = new ItemLineImpl(this, itemStack);
-        lines.add(line);
-        refreshSingleLines();
-        return line;
-    }
-    
-    @Override
-    public TextLine insertTextLine(int index, String text) {
-        checkState();
-
-        TextLineImpl line = new TextLineImpl(this, text);
-        lines.add(index, line);
-        refreshSingleLines();
-        return line;
-    }
-    
-    @Override
-    public ItemLine insertItemLine(int index, ItemStack itemStack) {
-        checkState();
-        Preconditions.notNull(itemStack, "itemStack");
-        
-        ItemLineImpl line = new ItemLineImpl(this, itemStack);
-        lines.add(index, line);
-        refreshSingleLines();
-        return line;
-    }
-    
-    @Override
-    public void removeLine(int index) {
-        checkState();
-
-        lines.remove(index).despawn();
-        refreshSingleLines();
-    }
-    
-    public void removeLine(HologramLineImpl line) {
-        checkState();
-
-        lines.remove(line);
-        line.despawn();
-        refreshSingleLines();
-    }
-    
-    @Override
-    public void clearLines() {
-        for (HologramLineImpl line : lines) {
-            line.despawn();
-        }
-        
-        lines.clear();
-    }
-    
-    @Override
-    public int size() {
-        return lines.size();
-    }
-    
-    @Override
-    public double getHeight() {
-        if (lines.isEmpty()) {
-            return 0;
-        }
-        
-        double height = 0.0;
-        
-        for (HologramLineImpl line : lines) {
-            height += line.getHeight();
-        }
-        
-        height += Configuration.spaceBetweenLines * (lines.size() - 1);
-        return height;
-    }
-    
-    @Override
-    public VisibilityManager getVisibilityManager() {
-        return visibilityManager;
-    }
-    
-    @Override
-    public long getCreationTimestamp() {
-        return creationTimestamp;
-    }
-
-    @Override
-    public boolean isAllowPlaceholders() {
-        return allowPlaceholders;
-    }
-
-    @Override
-    public void setAllowPlaceholders(boolean allowPlaceholders) {
-        if (this.allowPlaceholders == allowPlaceholders) {
-            return;
-        }
-        
-        this.allowPlaceholders = allowPlaceholders;
-        refreshAll();
-    }
-
-    public NMSManager getNMSManager() {
-        return nmsManager;
-    }
-
-    public void refreshAll() {
-        if (world.isChunkLoaded(chunkX, chunkZ)) {
-            spawnEntities();
-        }
-    }
-    
-    public void refreshSingleLines() {
-        if (world.isChunkLoaded(chunkX, chunkZ)) {
-            double currentY = this.y;
-            boolean first = true;
-            
-            for (HologramLineImpl line : lines) {
-                currentY -= line.getHeight();
-                
-                if (first) {
-                    first = false;
-                } else {
-                    currentY -= Configuration.spaceBetweenLines;
-                }
-                
-                if (line.isSpawned()) {
-                    line.teleport(x, currentY, z);
-                } else {
-                    line.spawn(world, x, currentY, z);
-                    if (allowPlaceholders && line instanceof TextLineImpl) {
-                        PlaceholdersManager.trackIfNecessary((TextLineImpl) line);
-                    }
-                }
-            }
-        }
-    }
-    
-    /**
-     * Forces the entities to (re)spawn, without checking if the chunk is loaded.
-     */
-    public void spawnEntities() {
-        checkState();
-
-        despawnEntities();
-
-        double currentY = this.y;
-        boolean first = true;
-        
-        for (HologramLineImpl line : lines) {
-            currentY -= line.getHeight();
-            
-            if (first) {
-                first = false;
-            } else {
-                currentY -= Configuration.spaceBetweenLines;
-            }
-            
-            line.spawn(world, x, currentY, z);
-            if (allowPlaceholders && line instanceof TextLineImpl) {
-                PlaceholdersManager.trackIfNecessary((TextLineImpl) line);
-            }
-        }
-    }
-    
-    public void despawnEntities() {
-        for (HologramLineImpl piece : lines) {
-            piece.despawn();
-        }
-    }
-    
-    @Override
-    public void teleport(Location location) {
-        Preconditions.notNull(location, "location");
-        teleport(location.getWorld(), location.getX(), location.getY(), location.getZ());
-    }
-    
-    @Override
-    public void teleport(World world, double x, double y, double z) {
-        checkState();
-        Preconditions.notNull(world, "world");
-        
-        setLocation(world, x, y, z);
-        
-        if (this.world != world) {
-            despawnEntities();
-            refreshAll();
-            return;
-        }
-        
-        double currentY = y;
-        boolean first = true;
-        
-        for (HologramLineImpl line : lines) {
-            if (!line.isSpawned()) {
-                continue;
-            }
-            
-            currentY -= line.getHeight();
-            
-            if (first) {
-                first = false;
-            } else {
-                currentY -= Configuration.spaceBetweenLines;
-            }
-            
-            line.teleport(x, currentY, z);
-        }
-    }
-
-    private void checkState() {
-        Preconditions.checkState(!deleted, "hologram already deleted");
-    }
-
-    @Override
-    public String toString() {
-        return "BaseHologram [world=" + world + ", x=" + x + ", y=" + y + ", z=" + z + ", lines=" + lines + ", deleted=" + deleted + "]";
-    }
-
-    /*
-     * Object.equals() and Object.hashCode() are not overridden:
-     * two holograms are equal only if they are the same exact instance.
-     */
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/HologramComponent.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object;
+
+import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.common.Utils;
+import org.bukkit.Chunk;
+import org.bukkit.Location;
+import org.bukkit.World;
+
+public abstract class HologramComponent {
+
+    private World world;
+    private double x, y, z;
+    private int chunkX, chunkZ;
+    
+    public boolean isInChunk(Chunk chunk) {
+        return world != null 
+                && chunk.getWorld() == world 
+                && chunk.getX() == chunkX 
+                && chunk.getZ() == chunkZ;
+    }
+
+    public boolean isInLoadedChunk() {
+        return world.isChunkLoaded(chunkX, chunkZ);
+    }
+
+    public Location getLocation() {
+        return new Location(world, x, y, z);
+    }
+    
+    protected void setLocation(Location location) {
+        setLocation(location.getWorld(), location.getX(), location.getY(), location.getZ());
+    }
+
+    protected void setLocation(World world, double x, double y, double z) {
+        Preconditions.notNull(world, "world");
+
+        this.world = world;
+        this.x = x;
+        this.y = y;
+        this.z = z;
+        this.chunkX = Utils.floor(x) >> 4;
+        this.chunkZ = Utils.floor(z) >> 4;
+    }
+
+    public World getWorld() {
+        return world;
+    }
+
+    public double getX() {
+        return x;
+    }
+
+    public double getY() {
+        return y;
+    }
+
+    public double getZ() {
+        return z;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/InternalHologram.java

@@ -1,37 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object;
-
-import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import org.bukkit.Location;
-
-public class InternalHologram extends BaseHologram {
-
-    private final String name;
-    private final InternalHologramManager internalHologramManager;
-
-    protected InternalHologram(Location source, String name, NMSManager nmsManager, InternalHologramManager internalHologramManager) {
-        super(source, nmsManager);
-        this.name = name;
-        this.internalHologramManager = internalHologramManager;
-        setAllowPlaceholders(true);
-    }
-
-    public String getName() {
-        return name;
-    }
-    
-    @Override
-    public void delete() {
-        internalHologramManager.deleteHologram(this);
-    }
-
-    @Override
-    public String toString() {
-        return "InternalHologram [name=" + name + ", super=" + super.toString() + "]";
-    }    
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/api/APIHologram.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.api;
+
+import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.api.Hologram;
+import me.filoghost.holographicdisplays.api.line.ItemLine;
+import me.filoghost.holographicdisplays.api.line.TextLine;
+import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseHologramLine;
+import me.filoghost.holographicdisplays.object.base.BaseItemLine;
+import me.filoghost.holographicdisplays.object.base.BaseTextLine;
+import org.bukkit.Location;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.plugin.Plugin;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class APIHologram extends BaseHologram implements Hologram {
+    
+    private final Plugin plugin;
+    private final APIHologramManager apiHologramManager;
+    private final List<BaseHologramLine> lines;
+
+    protected APIHologram(Location source, Plugin plugin, NMSManager nmsManager, APIHologramManager apiHologramManager) {
+        super(source, nmsManager);
+        Preconditions.notNull(plugin, "plugin");
+        this.plugin = plugin;
+        this.apiHologramManager = apiHologramManager;
+        this.lines = new ArrayList<>();
+
+    }
+    
+    public Plugin getOwner() {
+        return plugin;
+    }
+
+    @Override
+    public List<BaseHologramLine> getLinesUnsafe() {
+        return lines;
+    }
+
+    @Override
+    public TextLine appendTextLine(String text) {
+        checkState();
+
+        BaseTextLine line = new BaseTextLine(this, text);
+        lines.add(line);
+        refresh();
+        return line;
+    }
+
+    @Override
+    public ItemLine appendItemLine(ItemStack itemStack) {
+        checkState();
+        Preconditions.notNull(itemStack, "itemStack");
+
+        BaseItemLine line = new BaseItemLine(this, itemStack);
+        lines.add(line);
+        refresh();
+        return line;
+    }
+
+    @Override
+    public TextLine insertTextLine(int index, String text) {
+        checkState();
+
+        BaseTextLine line = new BaseTextLine(this, text);
+        lines.add(index, line);
+        refresh();
+        return line;
+    }
+
+    @Override
+    public ItemLine insertItemLine(int index, ItemStack itemStack) {
+        checkState();
+        Preconditions.notNull(itemStack, "itemStack");
+
+        BaseItemLine line = new BaseItemLine(this, itemStack);
+        lines.add(index, line);
+        refresh();
+        return line;
+    }
+
+    @Override
+    public void delete() {
+        apiHologramManager.deleteHologram(this);
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/api/APIHologramManager.java

@@ -3,18 +3,20 @@
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
-package me.filoghost.holographicdisplays.object;
+package me.filoghost.holographicdisplays.object.api;
 
 import me.filoghost.holographicdisplays.api.Hologram;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import me.filoghost.holographicdisplays.object.base.BaseHologramManager;
 import org.bukkit.Location;
 import org.bukkit.plugin.Plugin;
 
+import java.util.Collection;
 import java.util.Collections;
-import java.util.HashSet;
+import java.util.LinkedList;
-import java.util.Set;
+import java.util.List;
 
-public class APIHologramManager extends HologramManager<APIHologram> {
+public class APIHologramManager extends BaseHologramManager<APIHologram> {
 
     private final NMSManager nmsManager;
 
@@ -28,8 +30,8 @@ public class APIHologramManager extends HologramManager<APIHologram> {
         return hologram;
     }
 
-    public Set<Hologram> getHologramsByPlugin(Plugin plugin) {
+    public Collection<Hologram> getHologramsByPlugin(Plugin plugin) {
-        Set<Hologram> ownedHolograms = new HashSet<>();
+        List<Hologram> ownedHolograms = new LinkedList<>();
         
         for (APIHologram hologram : getHolograms()) {
             if (hologram.getOwner().equals(plugin)) {
@@ -37,7 +39,7 @@ public class APIHologramManager extends HologramManager<APIHologram> {
             }
         }
         
-        return Collections.unmodifiableSet(ownedHolograms);
+        return Collections.unmodifiableList(ownedHolograms);
     }
 
 }

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/BaseHologram.java

@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.base;
+
+import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.api.Hologram;
+import me.filoghost.holographicdisplays.api.VisibilityManager;
+import me.filoghost.holographicdisplays.api.line.HologramLine;
+import me.filoghost.holographicdisplays.disk.Configuration;
+import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import me.filoghost.holographicdisplays.object.HologramComponent;
+import org.bukkit.Location;
+import org.bukkit.World;
+
+import java.util.List;
+
+public abstract class BaseHologram extends HologramComponent implements Hologram {
+    
+    private final NMSManager nmsManager;
+    private final VisibilityManager visibilityManager;
+    private final long creationTimestamp;
+
+    private boolean allowPlaceholders;
+    private boolean deleted;
+
+    public BaseHologram(Location location, NMSManager nmsManager) {
+        Preconditions.notNull(location, "location");
+        this.setLocation(location);
+        this.nmsManager = nmsManager;
+        this.visibilityManager = new DefaultVisibilityManager(this);
+        this.creationTimestamp = System.currentTimeMillis();
+        this.allowPlaceholders = false;
+    }
+
+    public abstract List<? extends SpawnableHologramLine> getLinesUnsafe();
+    
+    @Override
+    public boolean isDeleted() {
+        return deleted;
+    }
+
+    public void setDeleted() {
+        if (!deleted) {
+            deleted = true;
+            clearLines();
+        }
+    }
+
+    @Override
+    public long getCreationTimestamp() {
+        return creationTimestamp;
+    }
+
+    @Override
+    public void setAllowPlaceholders(boolean allowPlaceholders) {
+        if (this.allowPlaceholders == allowPlaceholders) {
+            return;
+        }
+
+        this.allowPlaceholders = allowPlaceholders;
+        refresh(true);
+    }
+    
+    @Override
+    public boolean isAllowPlaceholders() {
+        return allowPlaceholders;
+    }
+
+    public NMSManager getNMSManager() {
+        return nmsManager;
+    }
+
+    @Override
+    public HologramLine getLine(int index) {
+        return getLinesUnsafe().get(index);
+    }
+
+    @Override
+    public void removeLine(int index) {
+        checkState();
+
+        getLinesUnsafe().remove(index).despawn();
+        refresh();
+    }
+
+    public void removeLine(SpawnableHologramLine line) {
+        checkState();
+
+        getLinesUnsafe().remove(line);
+        line.despawn();
+        refresh();
+    }
+
+    @Override
+    public void clearLines() {
+        for (SpawnableHologramLine line : getLinesUnsafe()) {
+            line.despawn();
+        }
+        
+        getLinesUnsafe().clear();
+    }
+
+    @Override
+    public int size() {
+        return getLinesUnsafe().size();
+    }
+
+    @Override
+    public void teleport(Location location) {
+        Preconditions.notNull(location, "location");
+        teleport(location.getWorld(), location.getX(), location.getY(), location.getZ());
+    }
+
+    @Override
+    public void teleport(World world, double x, double y, double z) {
+        checkState();
+        Preconditions.notNull(world, "world");
+
+        setLocation(world, x, y, z);
+        refresh();
+    }
+
+    public void refresh() {
+        refresh(false);
+    }
+
+    public void refresh(boolean forceRespawn) {
+        refresh(forceRespawn, isInLoadedChunk());
+    }
+
+    public void refresh(boolean forceRespawn, boolean isChunkLoaded) {
+        checkState();
+        
+        if (isChunkLoaded) {
+            respawnEntities(forceRespawn);
+        } else {
+            despawnEntities();
+        }
+    }
+
+    @Override
+    public double getHeight() {
+        if (getLinesUnsafe().isEmpty()) {
+            return 0;
+        }
+
+        double height = 0.0;
+
+        for (SpawnableHologramLine line : getLinesUnsafe()) {
+            height += line.getHeight();
+        }
+
+        height += Configuration.spaceBetweenLines * (getLinesUnsafe().size() - 1);
+        return height;
+    }
+
+    /*
+     * When spawning at a location, the top part of the first line should be exactly on that location.
+     * The second line is below the first, and so on.
+     */
+    private void respawnEntities(boolean forceRespawn) {
+        double currentLineY = getY();
+
+        for (int i = 0; i < getLinesUnsafe().size(); i++) {
+            SpawnableHologramLine line = getLinesUnsafe().get(i);
+            
+            currentLineY -= line.getHeight();
+            if (i > 0) {
+                currentLineY -= Configuration.spaceBetweenLines;
+            }
+
+            if (forceRespawn) {
+                line.despawn();
+            }
+            line.respawn(getWorld(), getX(), currentLineY, getZ());
+        }
+    }
+
+    public void despawnEntities() {
+        for (SpawnableHologramLine line : getLinesUnsafe()) {
+            line.despawn();
+        }
+    }
+
+    @Override
+    public VisibilityManager getVisibilityManager() {
+        return visibilityManager;
+    }
+
+    protected void checkState() {
+        Preconditions.checkState(!deleted, "hologram already deleted");
+    }
+
+    @Override
+    public String toString() {
+        return "BaseHologram [location=" + getLocation() + ", lines=" + getLinesUnsafe() + ", deleted=" + deleted + "]";
+    }
+
+    /*
+     * Object.equals() and Object.hashCode() are not overridden:
+     * two holograms are equal only if they are the same exact instance.
+     */
+    
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/BaseHologramLine.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.base;
+
+import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import me.filoghost.holographicdisplays.object.HologramComponent;
+import org.bukkit.World;
+
+public abstract class BaseHologramLine extends HologramComponent implements SpawnableHologramLine {
+    
+    private final BaseHologram parent;
+    
+    private boolean isSpawned;
+
+    protected BaseHologramLine(BaseHologram parent) {
+        Preconditions.notNull(parent, "parent hologram");
+        this.parent = parent;
+    }
+    
+    public final BaseHologram getParent() {
+        return parent;
+    }
+
+    protected final NMSManager getNMSManager() {
+        return parent.getNMSManager();
+    }
+
+    @Override
+    public final void removeLine() {
+        parent.removeLine(this);
+    }
+
+    @Override
+    public final void respawn(World world, double x, double y, double z) {
+        Preconditions.notNull(world, "world");
+        
+        boolean changedWorld = world != getWorld();
+        setLocation(world, x, y, z);
+        
+        if (changedWorld) {
+            // World has changed, entities must be fully respawned
+            despawnEntities();
+            spawnEntities(world, x, y, z);
+            
+        } else if (isSpawned) {
+            // Line is already spawned, respawn can be avoided
+            teleportEntities(x, y, z);
+            
+        } else {
+            // Line is not spawned, entities must be spawned
+            spawnEntities(world, x, y, z);
+        }
+
+        isSpawned = true;
+    }
+
+    @Override
+    public final void despawn() {
+        despawnEntities();
+        isSpawned = false;
+    }
+    
+    protected boolean isSpawned() {
+        return isSpawned;
+    }
+
+    protected abstract void spawnEntities(World world, double x, double y, double z);
+
+    protected abstract void teleportEntities(double x, double y, double z);
+
+    protected abstract void despawnEntities();
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/BaseHologramManager.java

@@ -3,7 +3,7 @@
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
-package me.filoghost.holographicdisplays.object;
+package me.filoghost.holographicdisplays.object.base;
 
 import me.filoghost.fcommons.Preconditions;
 import org.bukkit.Chunk;
@@ -12,7 +12,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-public class HologramManager<H extends BaseHologram> {
+public class BaseHologramManager<H extends BaseHologram> {
 
     private final List<H> holograms = new ArrayList<>();
     private final List<H> unmodifiableHologramsView = Collections.unmodifiableList(holograms);
@@ -21,7 +21,7 @@ public class HologramManager<H extends BaseHologram> {
         holograms.add(hologram);
     }
 
-    protected void deleteHologram(H hologram) {
+    public void deleteHologram(H hologram) {
         Preconditions.checkArgument(hologram.isDeleted(), "hologram must be deleted first");
         holograms.remove(hologram);
         hologram.setDeleted();
@@ -36,7 +36,7 @@ public class HologramManager<H extends BaseHologram> {
         holograms.clear();
 
         for (H hologram : oldHolograms) {
-            hologram.delete();
+            hologram.setDeleted();
         }
     }
     
@@ -44,7 +44,7 @@ public class HologramManager<H extends BaseHologram> {
         // Load the holograms in that chunk.
         for (H hologram : holograms) {
             if (hologram.isInChunk(chunk)) {
-                hologram.spawnEntities();
+                hologram.refresh(false, true);
             }
         }
     }

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/BaseItemLine.java

@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.base;
+
+import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.api.handler.PickupHandler;
+import me.filoghost.holographicdisplays.api.line.ItemLine;
+import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
+import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSItem;
+import org.bukkit.World;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.Collection;
+
+public class BaseItemLine extends BaseTouchableLine implements ItemLine {
+    
+    private ItemStack itemStack;
+    private PickupHandler pickupHandler;
+    
+    private NMSItem itemEntity;
+    private NMSArmorStand vehicleEntity;
+    
+    public BaseItemLine(BaseHologram parent, ItemStack itemStack) {
+        super(parent);
+        setItemStack(itemStack);
+    }
+    
+    @Override
+    public ItemStack getItemStack() {
+        return itemStack;
+    }
+
+    @Override
+    public void setItemStack(ItemStack itemStack) {
+        Preconditions.notNull(itemStack, "itemStack");
+        Preconditions.checkArgument(0 < itemStack.getAmount() && itemStack.getAmount() <= 64, "Item must have amount between 1 and 64");
+        this.itemStack = itemStack;
+        
+        if (itemEntity != null) {
+            itemEntity.setItemStackNMS(itemStack);
+        }
+    }
+
+    @Override
+    public PickupHandler getPickupHandler() {
+        return pickupHandler;
+    }
+
+    @Override
+    public void setPickupHandler(PickupHandler pickupHandler) {
+        this.pickupHandler = pickupHandler;
+    }
+
+    @Override
+    public void spawnEntities(World world, double x, double y, double z) {
+        super.spawnEntities(world, x, y, z);
+        
+        if (itemStack != null) {
+            itemEntity = getNMSManager().spawnNMSItem(world, x, y + getItemSpawnOffset(), z, this, itemStack);
+            vehicleEntity = getNMSManager().spawnNMSArmorStand(world, x, y + getItemSpawnOffset(), z, this);
+
+            itemEntity.setPassengerOfNMS(vehicleEntity);
+        }
+    }
+    
+    @Override
+    public void teleportEntities(double x, double y, double z) {
+        super.teleportEntities(x, y, z);
+
+        if (vehicleEntity != null) {
+            vehicleEntity.setLocationNMS(x, y + getItemSpawnOffset(), z);
+        }
+        if (itemEntity != null) {
+            itemEntity.setLocationNMS(x, y + getItemSpawnOffset(), z);
+        }
+    }
+
+    @Override
+    public void despawnEntities() {
+        super.despawnEntities();
+        
+        if (vehicleEntity != null) {
+            vehicleEntity.killEntityNMS();
+            vehicleEntity = null;
+        }
+        
+        if (itemEntity != null) {
+            itemEntity.killEntityNMS();
+            itemEntity = null;
+        }
+    }
+
+    @Override
+    public double getHeight() {
+        return 0.7;
+    }
+
+    @Override
+    public void collectEntityIDs(Collection<Integer> collector) {
+        super.collectEntityIDs(collector);
+        
+        if (vehicleEntity != null) {
+            collector.add(vehicleEntity.getIdNMS());
+        }
+        if (itemEntity != null) {
+            collector.add(itemEntity.getIdNMS());
+        }
+    }
+
+    public NMSItem getNMSItem() {
+        return itemEntity;
+    }
+
+    public NMSArmorStand getNMSVehicle() {
+        return vehicleEntity;
+    }
+    
+    private double getItemSpawnOffset() {
+        return 0;
+    }
+
+    @Override
+    public String toString() {
+        return "ItemLine [itemStack=" + itemStack + ", pickupHandler=" + pickupHandler + "]";
+    }
+    
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/BaseTextLine.java

@@ -3,52 +3,45 @@
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
-package me.filoghost.holographicdisplays.object.line;
+package me.filoghost.holographicdisplays.object.base;
 
-import me.filoghost.holographicdisplays.api.handler.TouchHandler;
 import me.filoghost.holographicdisplays.api.line.TextLine;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSNameable;
-import me.filoghost.holographicdisplays.object.BaseHologram;
 import me.filoghost.holographicdisplays.placeholder.PlaceholdersManager;
 import me.filoghost.holographicdisplays.placeholder.RelativePlaceholder;
-import org.apache.commons.lang.ArrayUtils;
-import org.bukkit.Location;
 import org.bukkit.World;
 
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 
-public class TextLineImpl extends TouchableLineImpl implements TextLine {
+public class BaseTextLine extends BaseTouchableLine implements TextLine {
 
     private String text;
     private List<RelativePlaceholder> relativePlaceholders;
-    private NMSArmorStand nmsNameable;
+    private NMSArmorStand nameableEntity;
     
     
-    public TextLineImpl(BaseHologram parent, String text) {
+    public BaseTextLine(BaseHologram parent, String text) {
         super(parent);
         setText(text);
     }
     
-    @Override
     public String getText() {
         return text;
     }
     
-    @Override
     public void setText(String text) {
         this.text = text;
         
-        if (nmsNameable != null) {
+        if (nameableEntity != null) {
             if (text != null && !text.isEmpty()) {
-                nmsNameable.setCustomNameNMS(text);
+                nameableEntity.setCustomNameNMS(text);
                 if (getParent().isAllowPlaceholders()) {
                     PlaceholdersManager.trackIfNecessary(this);
                 }
             } else {
-                nmsNameable.setCustomNameNMS(""); // It will not appear
+                nameableEntity.setCustomNameNMS(""); // It will not appear
                 if (getParent().isAllowPlaceholders()) {
                     PlaceholdersManager.untrack(this);
                 }
@@ -73,34 +66,36 @@ public class TextLineImpl extends TouchableLineImpl implements TextLine {
     }
 
     @Override
-    public void setTouchHandler(TouchHandler touchHandler) {
+    public void spawnEntities(World world, double x, double y, double z) {
-        if (nmsNameable != null) {
+        super.spawnEntities(world, x, y, z);
-            Location loc = nmsNameable.getBukkitEntityNMS().getLocation();
+            
-            super.setTouchHandler(touchHandler, loc.getWorld(), loc.getX(), loc.getY() - getTextOffset(), loc.getZ());
+        nameableEntity = getNMSManager().spawnNMSArmorStand(world, x, y + getTextSpawnOffset(), z, this);
-        } else {
+
-            super.setTouchHandler(touchHandler, null, 0, 0, 0);
+        if (text != null && !text.isEmpty()) {
+            nameableEntity.setCustomNameNMS(text);
+        }
+
+        if (getParent().isAllowPlaceholders()) {
+            PlaceholdersManager.trackIfNecessary(this);
         }
     }
     
     @Override
-    public void spawnEntities(World world, double x, double y, double z) {
+    public void teleportEntities(double x, double y, double z) {
-        super.spawnEntities(world, x, y, z);
+        super.teleportEntities(x, y, z);
 
-        nmsNameable = getNMSManager().spawnNMSArmorStand(world, x, y + getTextOffset(), z, this);
+        if (nameableEntity != null) {
-
+            nameableEntity.setLocationNMS(x, y + getTextSpawnOffset(), z);
-        if (text != null && !text.isEmpty()) {
-            nmsNameable.setCustomNameNMS(text);
         }
     }
 
-    
     @Override
     public void despawnEntities() {
         super.despawnEntities();
         
-        if (nmsNameable != null) {
+        if (nameableEntity != null) {
-            nmsNameable.killEntityNMS();
+            nameableEntity.killEntityNMS();
-            nmsNameable = null;
+            nameableEntity = null;
         }
     }
 
@@ -118,33 +113,20 @@ public class TextLineImpl extends TouchableLineImpl implements TextLine {
     }
     
     @Override
-    public void teleport(double x, double y, double z) {
+    public void collectEntityIDs(Collection<Integer> collector) {
-        super.teleport(x, y, z);
+        super.collectEntityIDs(collector);
         
-        if (nmsNameable != null) {
+        if (nameableEntity != null) {
-            nmsNameable.setLocationNMS(x, y + getTextOffset(), z);
+            collector.add(nameableEntity.getIdNMS());
         }
     }
 
-    @Override
+    public NMSArmorStand getNMSNameable() {
-    public int[] getEntitiesIDs() {
+        return nameableEntity;
-        if (isSpawned()) {
-            if (touchSlime != null) {
-                return ArrayUtils.add(touchSlime.getEntitiesIDs(), nmsNameable.getIdNMS());
-            } else {
-                return new int[] {nmsNameable.getIdNMS()};
-            }
-        } else {
-            return new int[0];
-        }
     }
 
-    public NMSNameable getNmsNameable() {
+    private double getTextSpawnOffset() {
-        return nmsNameable;
+        return -0.29;
-    }
-
-    private double getTextOffset() {
-        return Offsets.ARMOR_STAND_ALONE;
     }
 
     @Override

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/BaseTouchableLine.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.base;
+
+import me.filoghost.holographicdisplays.api.handler.TouchHandler;
+import me.filoghost.holographicdisplays.api.line.TouchableLine;
+import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
+import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSSlime;
+import org.bukkit.World;
+
+import java.util.Collection;
+
+/**
+ * Useful class that implements TouchablePiece. The downside is that subclasses must extend this, and cannot extend other classes.
+ * But all the current items are touchable.
+ */
+public abstract class BaseTouchableLine extends BaseHologramLine implements TouchableLine {
+
+    private static final double SLIME_HEIGHT = 0.5;
+    
+    private TouchHandler touchHandler;
+
+    private NMSSlime slimeEntity;
+    private NMSArmorStand vehicleEntity;
+    
+    protected BaseTouchableLine(BaseHologram parent) {
+        super(parent);
+    }
+    
+    @Override
+    public void setTouchHandler(TouchHandler touchHandler) {
+        this.touchHandler = touchHandler;
+        
+        if (touchHandler != null && slimeEntity == null && super.isSpawned()) {
+            // If the touch handler was null before and no entity has been spawned, spawn it now.
+            spawnSlime(getWorld(), getX(), getY(), getZ());
+            
+        } else if (touchHandler == null) {
+            // Opposite case, the touch handler was not null and an entity was spawned, but now it's useless.
+            despawnSlime();
+        }
+    }
+    
+    @Override
+    public TouchHandler getTouchHandler() {
+        return this.touchHandler;
+    }
+    
+    @Override
+    public void spawnEntities(World world, double x, double y, double z) {
+        if (touchHandler != null) {
+            spawnSlime(world, x, y, z);
+        }
+    }
+
+    @Override
+    public void teleportEntities(double x, double y, double z) {
+        if (vehicleEntity != null) {
+            vehicleEntity.setLocationNMS(x, getSlimeSpawnY(y), z);
+        }
+        if (slimeEntity != null) {
+            slimeEntity.setLocationNMS(x, getSlimeSpawnY(y), z);
+        }
+    }
+
+    @Override
+    public void despawnEntities() {
+        despawnSlime();
+    }
+
+    private void spawnSlime(World world, double x, double y, double z) {
+        despawnSlime();
+        
+        if (world != null) {
+            slimeEntity = getNMSManager().spawnNMSSlime(world, x, getSlimeSpawnY(y), z, this);
+            vehicleEntity = getNMSManager().spawnNMSArmorStand(world, x, getSlimeSpawnY(y), z, this);
+
+            slimeEntity.setPassengerOfNMS(vehicleEntity);
+        }
+    }
+
+    private void despawnSlime() {
+        if (slimeEntity != null) {
+            slimeEntity.killEntityNMS();
+            slimeEntity = null;
+        }
+
+        if (vehicleEntity != null) {
+            vehicleEntity.killEntityNMS();
+            vehicleEntity = null;
+        }
+    }
+
+    private double getSlimeSpawnY(double y) {
+        return y + ((getHeight() - SLIME_HEIGHT) / 2) + getSlimeSpawnOffset();
+    }
+    
+    private double getSlimeSpawnOffset() {
+        return 0;
+    }
+
+    @Override
+    public void collectEntityIDs(Collection<Integer> collector) {
+        if (vehicleEntity != null) {
+            collector.add(vehicleEntity.getIdNMS());
+        }
+        if (slimeEntity != null) {
+            collector.add(slimeEntity.getIdNMS());
+        }
+    }
+
+    public NMSArmorStand getNMSVehicle() {
+        return vehicleEntity;
+    }
+
+    public NMSSlime getNMSSlime() {
+        return slimeEntity;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/DefaultVisibilityManager.java

@@ -3,10 +3,9 @@
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
-package me.filoghost.holographicdisplays.object;
+package me.filoghost.holographicdisplays.object.base;
 
 import me.filoghost.fcommons.Preconditions;
-import me.filoghost.holographicdisplays.api.Hologram;
 import me.filoghost.holographicdisplays.api.VisibilityManager;
 import me.filoghost.holographicdisplays.bridge.protocollib.ProtocolLibHook;
 import org.bukkit.Bukkit;
@@ -17,15 +16,15 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
-public class VisibilityManagerImpl implements VisibilityManager {
+public class DefaultVisibilityManager implements VisibilityManager {
+
+    private static final int VISIBILITY_DISTANCE_SQUARED = 64 * 64;
     
     private final BaseHologram hologram;
     private Map<String, Boolean> playersVisibilityMap;
     private boolean visibleByDefault;
     
-    private static final int VISIBILITY_DISTANCE_SQUARED = 64 * 64;
+    public DefaultVisibilityManager(BaseHologram hologram) {
-    
-    public VisibilityManagerImpl(BaseHologram hologram) {
         Preconditions.notNull(hologram, "hologram");
         this.hologram = hologram;
         this.visibleByDefault = true;
@@ -161,7 +160,7 @@ public class VisibilityManagerImpl implements VisibilityManager {
         }
     }
     
-    private boolean isNear(Player player, Hologram hologram) {
+    private boolean isNear(Player player, BaseHologram hologram) {
         return player.isOnline() 
                 && player.getWorld().equals(hologram.getWorld()) 
                 && player.getLocation().distanceSquared(hologram.getLocation()) < VISIBILITY_DISTANCE_SQUARED;

plugin/src/main/java/me/filoghost/holographicdisplays/object/base/SpawnableHologramLine.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.base;
+
+import me.filoghost.holographicdisplays.api.line.HologramLine;
+import org.bukkit.World;
+
+import java.util.Collection;
+
+public interface SpawnableHologramLine extends HologramLine {
+
+    void respawn(World world, double x, double y, double z);
+
+    void despawn();
+
+    double getHeight();
+
+    void collectEntityIDs(Collection<Integer> collector);
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/internal/InternalHologram.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.internal;
+
+import me.filoghost.holographicdisplays.api.line.ItemLine;
+import me.filoghost.holographicdisplays.api.line.TextLine;
+import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
+import org.bukkit.Location;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class InternalHologram extends BaseHologram {
+
+    private final String name;
+    private final List<InternalHologramLine> lines;
+
+    protected InternalHologram(Location source, String name, NMSManager nmsManager) {
+        super(source, nmsManager);
+        super.setAllowPlaceholders(true);
+        this.name = name;
+        this.lines = new ArrayList<>();
+    }
+
+    public String getName() {
+        return name;
+    }
+    
+    @Override
+    public List<InternalHologramLine> getLinesUnsafe() {
+        return lines;
+    }
+    
+    @Override
+    public String toString() {
+        return "InternalHologram [name=" + name + ", super=" + super.toString() + "]";
+    }
+
+    @Override
+    public TextLine appendTextLine(String text) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ItemLine appendItemLine(ItemStack itemStack) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public TextLine insertTextLine(int index, String text) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ItemLine insertItemLine(int index, ItemStack itemStack) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void delete() {
+        throw new UnsupportedOperationException();
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/internal/InternalHologramLine.java

@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.internal;
+
+import me.filoghost.holographicdisplays.object.base.SpawnableHologramLine;
+
+public interface InternalHologramLine extends SpawnableHologramLine {
+    
+    String getSerializedConfigValue();
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/internal/InternalHologramManager.java

@@ -3,12 +3,13 @@
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
-package me.filoghost.holographicdisplays.object;
+package me.filoghost.holographicdisplays.object.internal;
 
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
+import me.filoghost.holographicdisplays.object.base.BaseHologramManager;
 import org.bukkit.Location;
 
-public class InternalHologramManager extends HologramManager<InternalHologram> {
+public class InternalHologramManager extends BaseHologramManager<InternalHologram> {
     
     private final NMSManager nmsManager;
 
@@ -17,7 +18,7 @@ public class InternalHologramManager extends HologramManager<InternalHologram> {
     }
 
     public InternalHologram createHologram(Location source, String name) {
-        InternalHologram hologram = new InternalHologram(source, name, nmsManager, this);
+        InternalHologram hologram = new InternalHologram(source, name, nmsManager);
         super.addHologram(hologram);
         return hologram;
     }

plugin/src/main/java/me/filoghost/holographicdisplays/object/internal/InternalItemLine.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.internal;
+
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseItemLine;
+import org.bukkit.inventory.ItemStack;
+
+public class InternalItemLine extends BaseItemLine implements InternalHologramLine {
+
+    private final String serializedConfigValue;
+
+    public InternalItemLine(BaseHologram parent, ItemStack itemStack, String serializedConfigValue) {
+        super(parent, itemStack);
+        this.serializedConfigValue = serializedConfigValue;
+    }
+
+    public String getSerializedConfigValue() {
+        return serializedConfigValue;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/internal/InternalTextLine.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.object.internal;
+
+import me.filoghost.holographicdisplays.object.base.BaseHologram;
+import me.filoghost.holographicdisplays.object.base.BaseTextLine;
+
+public class InternalTextLine extends BaseTextLine implements InternalHologramLine {
+
+    private final String serializedConfigValue;
+
+    public InternalTextLine(BaseHologram parent, String text, String serializedConfigValue) {
+        super(parent, text);
+        this.serializedConfigValue = serializedConfigValue;
+    }
+
+    public String getSerializedConfigValue() {
+        return serializedConfigValue;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/object/line/HologramLineImpl.java

@@ -1,80 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object.line;
-
-import me.filoghost.fcommons.Preconditions;
-import me.filoghost.holographicdisplays.api.line.HologramLine;
-import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
-import me.filoghost.holographicdisplays.object.BaseHologram;
-import org.bukkit.World;
-
-public abstract class HologramLineImpl implements HologramLine {
-    
-    private final BaseHologram parent;
-    
-    // This field is necessary for teleport.
-    private boolean isSpawned;
-    
-    // Useful for saving to disk.
-    private String serializedConfigValue;
-    
-    protected HologramLineImpl(BaseHologram parent) {
-        Preconditions.notNull(parent, "parent hologram");
-        this.parent = parent;
-    }
-    
-    @Override
-    public final BaseHologram getParent() {
-        return parent;
-    }
-    
-    protected final NMSManager getNMSManager() {
-        return parent.getNMSManager();
-    }
-    
-    @Override
-    public void removeLine() {
-        parent.removeLine(this);
-    }
-
-    public void spawn(World world, double x, double y, double z) {
-        Preconditions.notNull(world, "world");
-        
-        // Remove the old entities when spawning the new ones.
-        despawn();
-        isSpawned = true;
-        
-        spawnEntities(world, x, y, z);
-    }
-    
-    public final void despawn() {
-        isSpawned = false;
-        despawnEntities();
-    }
-
-    public String getSerializedConfigValue() {
-        return serializedConfigValue;
-    }
-
-    public void setSerializedConfigValue(String serializedConfigValue) {
-        this.serializedConfigValue = serializedConfigValue;
-    }
-
-    public final boolean isSpawned() {
-        return isSpawned;
-    }
-
-    protected abstract void spawnEntities(World world, double x, double y, double z);
-
-    protected abstract void despawnEntities();
-
-    public abstract void teleport(double x, double y, double z);
-
-    public abstract double getHeight();
-    
-    public abstract int[] getEntitiesIDs();
-
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/line/ItemLineImpl.java

@@ -1,145 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object.line;
-
-import me.filoghost.fcommons.Preconditions;
-import me.filoghost.holographicdisplays.api.handler.PickupHandler;
-import me.filoghost.holographicdisplays.api.handler.TouchHandler;
-import me.filoghost.holographicdisplays.api.line.ItemLine;
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSItem;
-import me.filoghost.holographicdisplays.object.BaseHologram;
-import org.apache.commons.lang.ArrayUtils;
-import org.bukkit.Location;
-import org.bukkit.World;
-import org.bukkit.inventory.ItemStack;
-
-public class ItemLineImpl extends TouchableLineImpl implements ItemLine {
-    
-    private ItemStack itemStack;
-    private PickupHandler pickupHandler;
-    
-    private NMSItem nmsItem;
-    private NMSArmorStand nmsVehicle;
-    
-    public ItemLineImpl(BaseHologram parent, ItemStack itemStack) {
-        super(parent);
-        setItemStack(itemStack);
-    }
-    
-    @Override
-    public ItemStack getItemStack() {
-        return itemStack;
-    }
-
-    @Override
-    public void setItemStack(ItemStack itemStack) {
-        Preconditions.notNull(itemStack, "itemStack");
-        Preconditions.checkArgument(0 < itemStack.getAmount() && itemStack.getAmount() <= 64, "Item must have amount between 1 and 64");
-        this.itemStack = itemStack;
-        
-        if (nmsItem != null) {
-            nmsItem.setItemStackNMS(itemStack);
-        }
-    }
-
-    @Override
-    public PickupHandler getPickupHandler() {
-        return pickupHandler;
-    }
-
-    @Override
-    public void setPickupHandler(PickupHandler pickupHandler) {
-        this.pickupHandler = pickupHandler;
-    }
-    
-    @Override
-    public void setTouchHandler(TouchHandler touchHandler) {
-        if (nmsVehicle != null) {
-            Location loc = nmsVehicle.getBukkitEntityNMS().getLocation();
-            super.setTouchHandler(touchHandler, loc.getWorld(), loc.getX(), loc.getY() - getItemOffset(), loc.getZ());
-        } else {
-            super.setTouchHandler(touchHandler, null, 0, 0, 0);
-        }
-    }
-
-    @Override
-    public void spawnEntities(World world, double x, double y, double z) {
-        super.spawnEntities(world, x, y, z);
-        
-        if (itemStack != null) {
-            nmsItem = getNMSManager().spawnNMSItem(world, x, y + getItemOffset(), z, this, itemStack);
-            nmsVehicle = getNMSManager().spawnNMSArmorStand(world, x, y + getItemOffset(), z, this);
-
-            nmsItem.setPassengerOfNMS(nmsVehicle);
-        }
-    }
-
-    
-    @Override
-    public void despawnEntities() {
-        super.despawnEntities();
-        
-        if (nmsVehicle != null) {
-            nmsVehicle.killEntityNMS();
-            nmsVehicle = null;
-        }
-        
-        if (nmsItem != null) {
-            nmsItem.killEntityNMS();
-            nmsItem = null;
-        }
-    }
-
-    @Override
-    public double getHeight() {
-        return 0.7;
-    }
-
-    @Override
-    public void teleport(double x, double y, double z) {
-        super.teleport(x, y, z);
-
-        if (nmsVehicle != null) {
-            nmsVehicle.setLocationNMS(x, y + getItemOffset(), z);
-        }
-        if (nmsItem != null) {
-            nmsItem.setLocationNMS(x, y + getItemOffset(), z);
-        }
-    }
-
-    @Override
-    public int[] getEntitiesIDs() {
-        if (isSpawned()) {
-            if (touchSlime != null) {
-                return ArrayUtils.addAll(new int[] {nmsVehicle.getIdNMS(), nmsItem.getIdNMS()}, touchSlime.getEntitiesIDs());
-            } else {
-                return new int[] {nmsVehicle.getIdNMS(), nmsItem.getIdNMS()};
-            }
-        } else {
-            return new int[0];
-        }
-    }
-
-    public NMSItem getNmsItem() {
-        return nmsItem;
-    }
-
-    public NMSEntityBase getNmsVehicle() {
-        return nmsVehicle;
-    }
-    
-    private double getItemOffset() {
-        return Offsets.ARMOR_STAND_WITH_ITEM;
-    }
-
-    @Override
-    public String toString() {
-        return "ItemLine [itemStack=" + itemStack + ", pickupHandler=" + pickupHandler + "]";
-    }
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/line/Offsets.java

@@ -1,23 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object.line;
-
-/**
- *  When spawning a hologram at a location, the top part of the first line should be exactly on that location.
- *  The second line is below the first, and so on.
- */
-public class Offsets {
-    
-    // A single armor stand.
-    public static final double ARMOR_STAND_ALONE = -0.29;
-        
-    // An armor stand holding an item.
-    public static final double ARMOR_STAND_WITH_ITEM = 0;
-    
-    // An armor stand holding a slime.
-    public static final double ARMOR_STAND_WITH_SLIME = 0;    
-
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/line/TouchSlimeLineImpl.java

@@ -1,99 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object.line;
-
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSArmorStand;
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSEntityBase;
-import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSSlime;
-import me.filoghost.holographicdisplays.object.BaseHologram;
-import org.bukkit.World;
-
-/**
- * A touch slime that can be applied to a line.
- */
-public class TouchSlimeLineImpl extends HologramLineImpl {
-    
-    // The touchable piece associated with this piece
-    private final TouchableLineImpl touchablePiece;
-    
-    private NMSSlime nmsSlime;
-    private NMSArmorStand nmsVehicle;
-
-    
-    protected TouchSlimeLineImpl(BaseHologram parent, TouchableLineImpl touchablePiece) {
-        super(parent);
-        this.touchablePiece = touchablePiece;
-    }
-
-    public TouchableLineImpl getTouchablePiece() {
-        return touchablePiece;
-    }
-
-
-    @Override
-    public void spawnEntities(World world, double x, double y, double z) {
-        nmsSlime = getNMSManager().spawnNMSSlime(world, x, y + getSlimeOffset(), z, this);
-        nmsVehicle = getNMSManager().spawnNMSArmorStand(world, x, y + getSlimeOffset(), z, this);
-        
-        nmsSlime.setPassengerOfNMS(nmsVehicle);
-    }
-
-    
-    @Override
-    public void despawnEntities() {
-        if (nmsSlime != null) {
-            nmsSlime.killEntityNMS();
-            nmsSlime = null;
-        }
-        
-        if (nmsVehicle != null) {
-            nmsVehicle.killEntityNMS();
-            nmsVehicle = null;
-        }
-    }
-
-    @Override
-    public double getHeight() {
-        return 0.5;
-    }
-
-    @Override
-    public void teleport(double x, double y, double z) {
-        if (nmsVehicle != null) {
-            nmsVehicle.setLocationNMS(x, y + getSlimeOffset(), z);
-        }
-        if (nmsSlime != null) {
-            nmsSlime.setLocationNMS(x, y + getSlimeOffset(), z);
-        }
-    }
-
-    @Override
-    public int[] getEntitiesIDs() {
-        if (isSpawned()) {
-            return new int[] {nmsVehicle.getIdNMS(), nmsSlime.getIdNMS()};
-        } else {
-            return new int[0];
-        }
-    }
-
-    public NMSSlime getNmsSlime() {
-        return nmsSlime;
-    }
-
-    public NMSEntityBase getNmsVehicle() {
-        return nmsVehicle;
-    }
-    
-    private double getSlimeOffset() {
-        return Offsets.ARMOR_STAND_WITH_SLIME;
-    }
-
-    @Override
-    public String toString() {
-        return "TouchSlimeLine [touchablePiece=" + touchablePiece + "]";
-    }
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/object/line/TouchableLineImpl.java

@@ -1,78 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.object.line;
-
-import me.filoghost.holographicdisplays.api.handler.TouchHandler;
-import me.filoghost.holographicdisplays.object.BaseHologram;
-import org.bukkit.World;
-
-/**
- * Useful class that implements TouchablePiece. The downside is that subclasses must extend this, and cannot extend other classes.
- * But all the current items are touchable.
- */
-public abstract class TouchableLineImpl extends HologramLineImpl {
-
-    protected TouchSlimeLineImpl touchSlime;
-    private TouchHandler touchHandler;
-
-    
-    protected TouchableLineImpl(BaseHologram parent) {
-        super(parent);
-    }
-    
-    
-    protected void setTouchHandler(TouchHandler touchHandler, World world, double x, double y, double z) {
-        this.touchHandler = touchHandler;
-        
-        if (touchHandler != null && touchSlime == null && world != null) {
-            // If the touch handler was null before and no entity has been spawned, spawn it now.
-            touchSlime = new TouchSlimeLineImpl(getParent(), this);
-            touchSlime.spawn(world, x, y + (getHeight() / 2.0 - touchSlime.getHeight() / 2.0), z);
-            
-        } else if (touchHandler == null && touchSlime != null) {
-            // Opposite case, the touch handler was not null and an entity was spawned, but now it's useless.
-            touchSlime.despawn();
-            touchSlime = null;
-        }
-    }
-
-    
-    public TouchHandler getTouchHandler() {
-        return this.touchHandler;
-    }
-
-
-    @Override
-    public void spawnEntities(World world, double x, double y, double z) {
-        if (touchHandler != null) {
-            touchSlime = new TouchSlimeLineImpl(getParent(), this);
-            touchSlime.spawn(world, x, y + (getHeight() / 2.0 - touchSlime.getHeight() / 2.0), z);
-        }
-    }
-
-
-    @Override
-    public void despawnEntities() {
-        if (touchSlime != null) {
-            touchSlime.despawn();
-            touchSlime = null;
-        }
-    }
-    
-    
-    @Override
-    public void teleport(double x, double y, double z) {
-        if (touchSlime != null) {
-            touchSlime.teleport(x, y + (getHeight() / 2.0 - touchSlime.getHeight() / 2.0), z);
-        }
-    }
-
-
-    public TouchSlimeLineImpl getTouchSlime() {
-        return touchSlime;
-    }
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersManager.java

@@ -10,7 +10,7 @@ import me.filoghost.holographicdisplays.api.placeholder.PlaceholderReplacer;
 import me.filoghost.holographicdisplays.bridge.bungeecord.BungeeServerTracker;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.nms.interfaces.entity.NMSNameable;
-import me.filoghost.holographicdisplays.object.line.TextLineImpl;
+import me.filoghost.holographicdisplays.object.base.BaseTextLine;
 import me.filoghost.holographicdisplays.task.WorldPlayerCounterTask;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
@@ -88,33 +88,29 @@ public class PlaceholdersManager {
         linesToUpdate.clear();
     }
     
-    public static void untrack(TextLineImpl line) {
+    public static void untrack(BaseTextLine line) {
-        if (line == null || !line.isSpawned()) {
-            return;
-        }
-        
         Iterator<DynamicLineData> iter = linesToUpdate.iterator();
         while (iter.hasNext()) {
             DynamicLineData data = iter.next();
-            if (data.getEntity() == line.getNmsNameable()) {
+            if (data.getEntity() == line.getNMSNameable()) {
                 iter.remove();
                 data.getEntity().setCustomNameNMS(data.getOriginalName());
             }
         }
     }
     
-    public static void trackIfNecessary(TextLineImpl line) {
+    public static void trackIfNecessary(BaseTextLine line) {        
-        NMSNameable nameableEntity = line.getNmsNameable();
+        String text = line.getText();
+        if (text == null || text.isEmpty()) {
+            return;
+        }
+        
+        NMSNameable nameableEntity = line.getNMSNameable();
         if (nameableEntity == null) {
             return;
         }        
         
-        String name = line.getText();
+        boolean updateText = false;
-        if (name == null || name.isEmpty()) {
-            return;
-        }
-        
-        boolean updateName = false;
 
         // Lazy initialization.
         Set<Placeholder> normalPlaceholders = null;
@@ -125,7 +121,7 @@ public class PlaceholdersManager {
         Matcher matcher;
         
         for (Placeholder placeholder : PlaceholdersRegister.getPlaceholders()) {
-            if (name.contains(placeholder.getTextPlaceholder())) {
+            if (text.contains(placeholder.getTextPlaceholder())) {
                 if (normalPlaceholders == null) {
                     normalPlaceholders = new HashSet<>();
                 }
@@ -135,7 +131,7 @@ public class PlaceholdersManager {
         
         
         // Players in a world count pattern.
-        matcher = WORLD_PATTERN.matcher(name);
+        matcher = WORLD_PATTERN.matcher(text);
         while (matcher.find()) {
             if (worldsOnlinePlayersReplacers == null) {
                 worldsOnlinePlayersReplacers = new HashMap<>();
@@ -164,7 +160,7 @@ public class PlaceholdersManager {
         }
         
         // BungeeCord online pattern.
-        matcher = BUNGEE_ONLINE_PATTERN.matcher(name);
+        matcher = BUNGEE_ONLINE_PATTERN.matcher(text);
         while (matcher.find()) {
             if (bungeeReplacers == null) {
                 bungeeReplacers = new HashMap<>();
@@ -198,7 +194,7 @@ public class PlaceholdersManager {
         }
         
         // BungeeCord max players pattern.
-        matcher = BUNGEE_MAX_PATTERN.matcher(name);
+        matcher = BUNGEE_MAX_PATTERN.matcher(text);
         while (matcher.find()) {
             if (bungeeReplacers == null) {
                 bungeeReplacers = new HashMap<>();
@@ -214,7 +210,7 @@ public class PlaceholdersManager {
         }
         
         // BungeeCord motd pattern.
-        matcher = BUNGEE_MOTD_PATTERN.matcher(name);
+        matcher = BUNGEE_MOTD_PATTERN.matcher(text);
         while (matcher.find()) {
             if (bungeeReplacers == null) {
                 bungeeReplacers = new HashMap<>();
@@ -230,7 +226,7 @@ public class PlaceholdersManager {
         }
         
         // BungeeCord motd (line 2) pattern.
-        matcher = BUNGEE_MOTD_2_PATTERN.matcher(name);
+        matcher = BUNGEE_MOTD_2_PATTERN.matcher(text);
         while (matcher.find()) {
             if (bungeeReplacers == null) {
                 bungeeReplacers = new HashMap<>();
@@ -246,7 +242,7 @@ public class PlaceholdersManager {
         }
         
         // BungeeCord status pattern.
-        matcher = BUNGEE_STATUS_PATTERN.matcher(name);
+        matcher = BUNGEE_STATUS_PATTERN.matcher(text);
         while (matcher.find()) {
             if (bungeeReplacers == null) {
                 bungeeReplacers = new HashMap<>();
@@ -263,7 +259,7 @@ public class PlaceholdersManager {
         
         
         // Animation pattern.
-        matcher = ANIMATION_PATTERN.matcher(name);
+        matcher = ANIMATION_PATTERN.matcher(text);
         while (matcher.find()) {
             String fileName = extractArgumentFromPlaceholder(matcher);
             Placeholder animation = AnimationsRegister.getAnimation(fileName);
@@ -277,13 +273,13 @@ public class PlaceholdersManager {
                 animationsPlaceholders.put(matcher.group(), animation);
                 
             } else {
-                name = name.replace(matcher.group(), "[Animation not found: " + fileName + "]");
+                text = text.replace(matcher.group(), "[Animation not found: " + fileName + "]");
-                updateName = true;
+                updateText = true;
             }
         }
         
         if (Utils.isThereNonNull(normalPlaceholders, bungeeReplacers, worldsOnlinePlayersReplacers, animationsPlaceholders)) {
-            DynamicLineData lineData = new DynamicLineData(nameableEntity, name);
+            DynamicLineData lineData = new DynamicLineData(nameableEntity, text);
             
             if (normalPlaceholders != null) {
                 lineData.setPlaceholders(normalPlaceholders);
@@ -312,8 +308,8 @@ public class PlaceholdersManager {
         } else {
             
             // The name needs to be updated anyways.
-            if (updateName) {
+            if (updateText) {
-                nameableEntity.setCustomNameNMS(name);
+                nameableEntity.setCustomNameNMS(text);
             }
         }
     }

plugin/src/main/java/me/filoghost/holographicdisplays/task/StartupLoadHologramsTask.java

@@ -9,8 +9,8 @@ import me.filoghost.fcommons.logging.Log;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.HologramConfig;
 import me.filoghost.holographicdisplays.disk.HologramLoadException;
-import me.filoghost.holographicdisplays.object.InternalHologram;
+import me.filoghost.holographicdisplays.object.internal.InternalHologram;
-import me.filoghost.holographicdisplays.object.InternalHologramManager;
+import me.filoghost.holographicdisplays.object.internal.InternalHologramManager;
 
 import java.util.Collection;
 
@@ -29,7 +29,7 @@ public class StartupLoadHologramsTask implements Runnable {
         for (HologramConfig hologramConfig : hologramConfigsToLoad) {
             try {
                 InternalHologram hologram = hologramConfig.createHologram(internalHologramManager);
-                hologram.refreshAll();
+                hologram.refresh();
             } catch (HologramLoadException e) {
                 Log.warning(Utils.formatExceptionMessage(e));
             } catch (Exception e) {