尝试增加tab列表对齐功能（暂未成功）

# Conflicts:
#	pom.xml

pom.xml

@@ -6,7 +6,7 @@
 
   <groupId>cn.lunadeer</groupId>
   <artifactId>EssentialsD</artifactId>
-    <version>2.2.4</version>
+    <version>2.3.1</version>
   <packaging>jar</packaging>
 
   <name>EssentialsD</name>

src/main/java/cn/lunadeer/essentialsd/EssentialsD.java

@@ -22,6 +22,7 @@ import cn.lunadeer.essentialsd.commands.weather.Sun;
 import cn.lunadeer.essentialsd.events.*;
 import cn.lunadeer.essentialsd.managers.ConfigManager;
 import cn.lunadeer.essentialsd.managers.DatabaseTables;
+import cn.lunadeer.essentialsd.managers.TabListUpdater;
 import cn.lunadeer.essentialsd.managers.TeleportManager;
 import cn.lunadeer.essentialsd.recipes.*;
 import cn.lunadeer.minecraftpluginutils.*;
@@ -53,6 +54,7 @@ public final class EssentialsD extends JavaPlugin {
         if (config.getPrefixEnable()) {
             if (Bukkit.getPluginManager().getPlugin("PlaceholderAPI") != null) {
                 Bukkit.getPluginManager().registerEvents(new ChatPrefixEvent(), this);
+                new TabListUpdater();   // 更新 TabList
             } else {
                 XLogger.warn("未找到 PlaceholderAPI 插件, 无法使用聊天前缀功能, 已自动关闭前缀功能");
                 config.setPrefixEnable(false);

src/main/java/cn/lunadeer/essentialsd/managers/ConfigManager.java

@@ -335,6 +335,16 @@ public class ConfigManager {
         _plugin.saveConfig();
     }
 
+    public String getPrefixTabFormat() {
+        return _prefix_tab_format;
+    }
+
+    public void setPrefixTabFormat(String format) {
+        _prefix_tab_format = format;
+        _file.set("Prefix.TabFormat", format);
+        _plugin.saveConfig();
+    }
+
 
     private final EssentialsD _plugin;
     private FileConfiguration _file;

src/main/java/cn/lunadeer/essentialsd/managers/TabListUpdater.java

@@ -0,0 +1,67 @@
+package cn.lunadeer.essentialsd.managers;
+
+import cn.lunadeer.essentialsd.EssentialsD;
+import cn.lunadeer.minecraftpluginutils.Scheduler;
+import me.clip.placeholderapi.PlaceholderAPI;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+public class TabListUpdater {
+
+    public static TabListUpdater instance;
+
+    public TabListUpdater() {
+        instance = this;
+        Scheduler.runTaskRepeatAsync(this::update, 0, 40);
+    }
+
+    private void update() {
+        Collection<? extends Player> players = Bukkit.getOnlinePlayers();
+        Map<UUID, String> formatedNames = new HashMap<>();
+
+        int longestFormatedStringLength = 0;
+
+        for (Player player : players) {
+            String formated = PlaceholderAPI.setPlaceholders(player, EssentialsD.config.getPrefixTabFormat());
+            if (length(formated) > longestFormatedStringLength) {
+                longestFormatedStringLength = length(formated);
+            }
+            formatedNames.put(player.getUniqueId(), formated);
+        }
+        // <span> 将会被替换为填充空格 " " 用于保证长度一致
+        for (Player player : players) {
+            String formated = formatedNames.get(player.getUniqueId());
+            int formatedLength = length(formated);
+            int spaceLength = longestFormatedStringLength - formatedLength;
+            StringBuilder space = new StringBuilder();
+            for (int i = 0; i < spaceLength; i++) {
+                space.append(" ");
+            }
+            player.setPlayerListName(formated.replace("<span>", space.toString()));
+        }
+    }
+
+    private static int length(String value) {
+        int valueLength = 0;
+        String chinese = "[\u0391-\uFFE5]";
+        /* 获取字段值的长度，如果含中文字符，则每个中文字符长度为2，否则为1 */
+        for (int i = 0; i < value.length(); i++) {
+            /* 获取一个字符 */
+            String temp = value.substring(i, i + 1);
+            /* 判断是否为中文字符 */
+            if (temp.matches(chinese)) {
+                /* 中文字符长度为2 */
+                valueLength += 2;
+            } else {
+                /* 其他字符长度为1 */
+                valueLength += 1;
+            }
+        }
+        return valueLength;
+    }
+}