Overhaul the IRC implementation.

* Simplified UI plumbing.
* Improves handling of errors and kicks.
* Persists chat history between session.
* Fixes leaks of the old widget tree when exiting.
* A few small UI polish improvements.

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

@@ -0,0 +1,163 @@
+#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;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Threading;
+using OpenRA.Chat;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	class GlobalChatLogic : IDisposable
+	{
+		readonly ScrollPanelWidget historyPanel;
+		readonly LabelWidget historyTemplate;
+		readonly ScrollPanelWidget nicknamePanel;
+		readonly Widget nicknameTemplate;
+		readonly TextFieldWidget inputBox;
+
+		[ObjectCreator.UseCtor]
+		public GlobalChatLogic(Widget widget)
+		{
+			historyPanel = widget.Get<ScrollPanelWidget>("HISTORY_PANEL");
+			historyTemplate = historyPanel.Get<LabelWidget>("HISTORY_TEMPLATE");
+			nicknamePanel = widget.Get<ScrollPanelWidget>("NICKNAME_PANEL");
+			nicknameTemplate = nicknamePanel.Get("NICKNAME_TEMPLATE");
+
+			historyPanel.Bind(Game.GlobalChat.History, MakeHistoryWidget, HistoryWidgetEquals, true);
+			nicknamePanel.Bind(Game.GlobalChat.Users, MakeUserWidget, UserWidgetEquals, false);
+
+			inputBox = widget.Get<TextFieldWidget>("CHAT_TEXTFIELD");
+			inputBox.IsDisabled = () => Game.GlobalChat.ConnectionStatus != ChatConnectionStatus.Joined;
+			inputBox.OnEnterKey = EnterPressed;
+
+			// Set a random default nick
+			if (Game.Settings.Chat.Nickname == new ChatSettings().Nickname)
+				Game.Settings.Chat.Nickname += Game.CosmeticRandom.Next(100, 999);
+
+			var nicknameBox = widget.Get<TextFieldWidget>("NICKNAME_TEXTFIELD");
+			nicknameBox.Text = Game.GlobalChat.SanitizedName(Game.Settings.Chat.Nickname);
+			nicknameBox.OnTextEdited = () =>
+			{
+				nicknameBox.Text = Game.GlobalChat.SanitizedName(nicknameBox.Text);
+			};
+
+			var connectPanel = widget.Get("GLOBALCHAT_CONNECT_PANEL");
+			connectPanel.IsVisible = () => Game.GlobalChat.ConnectionStatus == ChatConnectionStatus.Disconnected;
+
+			var disconnectButton = widget.Get<ButtonWidget>("DISCONNECT_BUTTON");
+			disconnectButton.OnClick = Game.GlobalChat.Disconnect;
+
+			var connectAutomaticallyCheckBox = connectPanel.Get<CheckboxWidget>("CONNECT_AUTOMATICALLY_CHECKBOX");
+			connectAutomaticallyCheckBox.IsChecked = () => Game.Settings.Chat.ConnectAutomatically;
+			connectAutomaticallyCheckBox.OnClick = () => { Game.Settings.Chat.ConnectAutomatically ^= true; Game.Settings.Save(); };
+
+			var connectButton = connectPanel.Get<ButtonWidget>("CONNECT_BUTTON");
+			connectButton.IsDisabled = () => !Game.GlobalChat.IsValidNickname(nicknameBox.Text);
+			connectButton.OnClick = () =>
+			{
+				Game.Settings.Chat.Nickname = nicknameBox.Text;
+				Game.Settings.Save();
+				Game.GlobalChat.Connect();
+			};
+
+			var mainPanel = widget.Get("GLOBALCHAT_MAIN_PANEL");
+			mainPanel.IsVisible = () => Game.GlobalChat.ConnectionStatus != ChatConnectionStatus.Disconnected;
+
+			mainPanel.Get<LabelWidget>("CHANNEL_TOPIC").GetText = () => Game.GlobalChat.Topic;
+
+			if (Game.Settings.Chat.ConnectAutomatically && Game.GlobalChat.IsValidNickname(Game.Settings.Chat.Nickname))
+				Game.GlobalChat.Connect();
+		}
+
+		Widget MakeHistoryWidget(object o)
+		{
+			var message = (ChatMessage)o;
+			var widget = (LabelWidget)historyTemplate.Clone();
+			var font = Game.Renderer.Fonts[widget.Font];
+
+			var color = message.Type == ChatMessageType.Notification ?
+				ChromeMetrics.Get<Color>("GlobalChatNotificationColor") :
+				ChromeMetrics.Get<Color>("GlobalChatTextColor");
+
+			var display = WidgetUtils.WrapText(message.ToString(), widget.Bounds.Width, font);
+			widget.Bounds.Height = font.Measure(display).Y;
+			widget.GetText = () => display;
+			widget.GetColor = () => color;
+			widget.Id = message.UID;
+			return widget;
+		}
+
+		bool HistoryWidgetEquals(Widget widget, object o)
+		{
+			return ((LabelWidget)widget).Id == ((ChatMessage)o).UID;
+		}
+
+		Widget MakeUserWidget(object o)
+		{
+			var nick = (string)o;
+			var client = Game.GlobalChat.Users[nick];
+
+			var item = nicknameTemplate.Clone();
+			item.Id = client.Name;
+			item.IsVisible = () => true;
+			var name = item.Get<LabelWidget>("NICK");
+			name.GetText = () => client.Name;
+			name.IsVisible = () => true;
+
+			// TODO: Add custom image for voice
+			var indicator = item.Get<ImageWidget>("INDICATOR");
+			indicator.IsVisible = () => client.IsOp || client.IsVoiced;
+			indicator.GetImageName = () => client.IsOp || client.IsVoiced ? "admin" : "";
+
+			return item;
+		}
+
+		bool UserWidgetEquals(Widget widget, object o)
+		{
+			var nick = (string)o;
+			return widget.Id == nick;
+		}
+
+		bool EnterPressed()
+		{
+			if (inputBox.Text.Length == 0)
+				return true;
+
+			if (inputBox.Text.StartsWith("/nick "))
+			{
+				var nick = inputBox.Text.Replace("/nick ", string.Empty);
+				Game.GlobalChat.TrySetNickname(nick);
+			}
+			else
+				Game.GlobalChat.SendMessage(inputBox.Text);
+
+			inputBox.Text = "";
+
+			return true;
+		}
+
+		bool disposed;
+		public void Dispose()
+		{
+			if (disposed)
+				return;
+
+			historyPanel.Unbind();
+			nicknamePanel.Unbind();
+
+			disposed = true;
+		}
+	}
+}