From 70925ee2c98af2acab9acf29ccc51f003bafb8ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E1=91=95=E1=96=87EE=E1=91=ADY=E1=91=95=E1=96=87EE?=
 =?UTF-8?q?=E1=91=ADE=E1=96=87?= <3404705272@qq.com>
Date: Sun, 20 Jul 2025 00:07:32 +0800
Subject: [PATCH] fix: style loss

---
 .../core/util/AdventureHelper.java            | 22 +++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/core/src/main/java/net/momirealms/craftengine/core/util/AdventureHelper.java b/core/src/main/java/net/momirealms/craftengine/core/util/AdventureHelper.java
index f58769a92..f3af38fc8 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/util/AdventureHelper.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/util/AdventureHelper.java
@@ -36,6 +36,20 @@ public class AdventureHelper {
     private final GsonComponentSerializer gsonComponentSerializer;
     private final NBTComponentSerializer nbtComponentSerializer;
     private static final TextReplacementConfig REPLACE_LF = TextReplacementConfig.builder().matchLiteral("\n").replacement(Component.newline()).build();
+    /**
+     * This iterator slices a component into individual parts that
+     * <ul>
+     *     <li>Can be used individually without style loss</li>
+     *     <li>Can be concatenated to form the original component, given that children are dropped</li>
+     * </ul>
+     * Any {@link net.kyori.adventure.text.ComponentIteratorFlag}s are ignored.
+     */
+    private static final ComponentIteratorType SLICER = (component, deque, flags) -> {
+        final List<Component> children = component.children();
+        for (int i = children.size() - 1; i >= 0; i--) {
+            deque.addFirst(children.get(i).applyFallbackStyle(component.style()));
+        }
+    };
 
     private AdventureHelper() {
         this.miniMessage = MiniMessage.builder().build();
@@ -219,17 +233,17 @@ public class AdventureHelper {
     public static List<Component> splitLines(Component component) {
         List<Component> result = new ArrayList<>(1);
         Component line = Component.empty();
-        for (Iterator<Component> it = component.replaceText(REPLACE_LF).iterator(ComponentIteratorType.DEPTH_FIRST); it.hasNext(); ) {
+        for (Iterator<Component> it = component.replaceText(REPLACE_LF).iterator(SLICER); it.hasNext(); ) {
             Component child = it.next().children(Collections.emptyList());
-            if (Component.EQUALS.test(child, Component.newline())) {
-                result.add(line);
+            if (child instanceof TextComponent text && text.content().equals(Component.newline().content())) {
+                result.add(line.compact());
                 line = Component.empty();
             } else {
                 line = line.append(child);
             }
         }
         if (Component.IS_NOT_EMPTY.test(line)) {
-            result.add(line);
+            result.add(line.compact());
         }
         return result;
     }