DisableAnvilRenaming

#Colored name will automatically transfer if the item name is untouched

#You can disable item renaming with the following options

#Do you want players to be able to rename item with colored name
disableRenamingColoredName: false

#Disable item renaming if the lore contains one of the following line
#Color codes are taken into account
disableRenamingIfLoreContains:
  - "this line"

package fr.station47.disableAnvilRenaming;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.configuration.InvalidConfigurationException;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.PrepareAnvilEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

import java.io.File;
import java.io.IOException;
import java.util.List;

public class Main extends JavaPlugin implements Listener {

    private YamlConfiguration config;
    private boolean disableColoredNameRenaming = false;
    private List<String> disablingLore;

    @Override
    public void onEnable(){
        File configFile = new File(getDataFolder(), "config.yml");
        if (!configFile.exists()) {
            saveResource("config.yml", false);
        }

        config = new YamlConfiguration();
        try {
            config.load(configFile);
        } catch (InvalidConfigurationException ex){
            Bukkit.getServer().getPluginManager().disablePlugin(this);
            Bukkit.getLogger().severe("The config is incorrectly formatted!");
            ex.printStackTrace();

        } catch (IOException ex){
            Bukkit.getServer().getPluginManager().disablePlugin(this);
            Bukkit.getLogger().severe("Erreur IOException!");
            ex.printStackTrace();
        }
        disableColoredNameRenaming = config.getBoolean("disableRenamingColoredName");
        disablingLore = config.getStringList("disableRenamingIfLoreContains");

        this.getServer().getPluginManager().registerEvents(this,this);
    }

    @EventHandler
    public void preventRenaming(PrepareAnvilEvent event){
        ItemStack original = event.getInventory().getItem(0);
        if (original == null || original.getItemMeta().getDisplayName() == null || event.getResult()==null) return;
        if (disableColoredNameRenaming){
            String displayName = original.getItemMeta().getDisplayName();
            if (!displayName.equals(ChatColor.stripColor(displayName))){
                ItemMeta resultMeta = event.getResult().getItemMeta();
                resultMeta.setDisplayName(displayName);
                event.getResult().setItemMeta(resultMeta);
                return;
            }
        }
        if (disablingLore.size() > 0){
            if (original.getItemMeta().getLore()!=null){
                for (String line:disablingLore){
                    for (String lore:original.getItemMeta().getLore()){
                        if (ChatColor.translateAlternateColorCodes('&',line).equals(lore)){
                            ItemMeta resultMeta = event.getResult().getItemMeta();
                            resultMeta.setDisplayName(original.getItemMeta().getDisplayName());
                            event.getResult().setItemMeta(resultMeta);
                            return;
                        }
                    }
                }
            }
        }
        String displayName = original.getItemMeta().getDisplayName();
        if (displayName.replaceAll("§","").equals(event.getInventory().getRenameText())){
            ItemMeta resultMeta = event.getResult().getItemMeta();
            resultMeta.setDisplayName(displayName);
            event.getResult().setItemMeta(resultMeta);
        }

    }
}