Split chat lines into pools

- Add a common class for passing around chat lines
- Add wrapper methods for adding chat lines
- Combine repeated chat lines in the display widget

OpenRA.Game/TextNotification.cs

@@ -0,0 +1,56 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2021 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using OpenRA.Primitives;
+
+namespace OpenRA
+{
+	public enum TextNotificationPool { System, Chat, Mission, Feedback }
+
+	public class TextNotification : IEquatable<TextNotification>
+	{
+		public readonly TextNotificationPool Pool;
+		public readonly string Prefix;
+		public readonly string Text;
+		public readonly Color PrefixColor;
+		public readonly Color TextColor;
+
+		public TextNotification(TextNotificationPool pool, string prefix, string text, Color prefixColor, Color textColor)
+		{
+			Pool = pool;
+			Prefix = prefix;
+			Text = text;
+			PrefixColor = prefixColor;
+			TextColor = textColor;
+		}
+
+		public bool CanIncrementOnDuplicate()
+		{
+			return Pool == TextNotificationPool.Feedback || Pool == TextNotificationPool.System;
+		}
+
+		public bool Equals(TextNotification other)
+		{
+			return other != null && other.GetHashCode() == GetHashCode();
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is TextNotification && Equals((TextNotification)obj);
+		}
+
+		public override int GetHashCode()
+		{
+			return string.Format("{0}{1}{2}", Prefix, Text, Pool).GetHashCode();
+		}
+	}
+}