feat(SeStringHandling): Add NewLinePayload

Dalamud/Game/Text/SeStringHandling/Payload.cs

@@ -131,6 +131,10 @@ namespace Dalamud.Game.Text.SeStringHandling
                     payload = new EmphasisItalicPayload();
                     break;
 
+                case SeStringChunkType.NewLine:
+                    payload = NewLinePayload.Payload;
+                    break;
+
                 case SeStringChunkType.SeHyphen:
                     payload = SeHyphenPayload.Payload;
                     break;
@@ -295,6 +299,11 @@ namespace Dalamud.Game.Text.SeStringHandling
             /// </summary>
             EmphasisItalic = 0x1A,
 
+            /// <summary>
+            /// See the <see cref="NewLinePayload"/>
+            /// </summary>
+            NewLine = 0x10,
+
             /// <summary>
             /// See the <see cref="SeHyphenPayload"/> class.
             /// </summary>

Dalamud/Game/Text/SeStringHandling/PayloadType.cs

@@ -5,6 +5,11 @@ namespace Dalamud.Game.Text.SeStringHandling
     /// </summary>
     public enum PayloadType
     {
+        /// <summary>
+        /// An unknown SeString.
+        /// </summary>
+        Unknown,
+
         /// <summary>
         /// An SeString payload representing a player link.
         /// </summary>
@@ -66,9 +71,9 @@ namespace Dalamud.Game.Text.SeStringHandling
         DalamudLink,
 
         /// <summary>
-        /// An SeString payload representing any data we don't handle.
+        /// An SeString payload representing a newline character.
         /// </summary>
-        Unknown,
+        NewLine,
 
         /// <summary>
         /// An SeString payload representing a doublewide SE hypen.

Dalamud/Game/Text/SeStringHandling/Payloads/NewLinePayload.cs

@@ -0,0 +1,34 @@
+using System;
+using System.IO;
+
+namespace Dalamud.Game.Text.SeStringHandling.Payloads
+{
+    /// <summary>
+    /// A wrapped newline character.
+    /// </summary>
+    public class NewLinePayload : Payload, ITextProvider
+    {
+        private readonly byte[] bytes = { START_BYTE, (byte)SeStringChunkType.NewLine, 0x01, END_BYTE };
+
+        /// <summary>
+        /// Gets an instance of NewLinePayload.
+        /// </summary>
+        public static NewLinePayload Payload => new();
+
+        /// <summary>
+        /// Gets the text of this payload, evaluates to <c>Environment.NewLine</c>
+        /// </summary>
+        public string Text => Environment.NewLine;
+
+        /// <inheritdoc/>
+        public override PayloadType Type => PayloadType.NewLine;
+
+        /// <inheritdoc/>
+        protected override byte[] EncodeImpl() => this.bytes;
+
+        /// <inheritdoc/>
+        protected override void DecodeImpl(BinaryReader reader, long endOfStream)
+        {
+        }
+    }
+}