move connection UI to commons

OpenRA.Mods.Common/Widgets/Logic/TabCompletionLogic.cs

@@ -0,0 +1,78 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	public class TabCompletionLogic
+	{
+		IList<string> candidates = new List<string>();
+		int currentCandidateIndex = 0;
+		string lastCompleted;
+		string prefix;
+		string suffix;
+
+		public IList<string> Commands { get; set; }
+
+		public IList<string> Names { get; set; }
+
+		public string Complete(string text)
+		{
+			if (string.IsNullOrWhiteSpace(text))
+				return text;
+
+			if (lastCompleted == text)
+			{
+				lastCompleted = prefix + candidates[++currentCandidateIndex % candidates.Count] + suffix;
+				return lastCompleted;
+			}
+
+			var toComplete = "";
+			if (text.StartsWith("/") && Commands != null)
+			{
+				prefix = "/";
+				suffix = "";
+				toComplete = text.Substring(1);
+				candidates = Commands.Where(x => x.StartsWith(toComplete, StringComparison.InvariantCultureIgnoreCase)).ToList();
+			}
+			else if (Names != null)
+			{
+				var oneWord = text.Contains(' ');
+				if (oneWord)
+				{
+					prefix = text.Substring(0, text.LastIndexOf(' ') + 1);
+					suffix = "";
+					toComplete = text.Substring(prefix.Length);
+				}
+				else
+				{
+					prefix = "";
+					suffix = ": ";
+					toComplete = text;
+				}
+
+				candidates = Names.Where(x => x.StartsWith(toComplete, StringComparison.InvariantCultureIgnoreCase)).ToList();
+			}
+			else
+				return text;
+
+			currentCandidateIndex = 0;
+
+			if (candidates.Count == 0)
+				return text;
+
+			lastCompleted = prefix + candidates[currentCandidateIndex] + suffix;
+			return lastCompleted;
+		}
+	}
+}