Add hex color parsing helper and implement custom list sources for channels and users

- Introduced HexColorHelper for parsing hex color strings to Terminal.Gui Attributes and Colors. - Created ChannelListSource for managing and rendering a list of channels with unread counts and active indicators. - Developed UserListSource for displaying online users with per-user nickname colors. - Refactored MainWindow to utilize ChatMessageManager for handling messages and channel state. - Updated project references and removed unused content from the server project. - Adjusted tests to reflect changes in namespaces and structure.
2026-09-04 23:34:10 +02:00 · 2026-02-22 08:08:21 +01:00
parent c5d8e25a86
commit c8ea124198
32 changed files with 1869 additions and 1586 deletions
@@ -0,0 +1,96 @@
+using System.Collections;
+using System.Collections.Specialized;
+using EchoHub.Client.UI.Chat;
+using Terminal.Gui.Drawing;
+using Terminal.Gui.Text;
+using Terminal.Gui.Views;
+using Attribute = Terminal.Gui.Drawing.Attribute;
+
+namespace EchoHub.Client.UI.ListSources;
+
+/// <summary>
+/// Custom list data source for colored channel list rendering.
+/// Active channel gets a > indicator, unread channels are bright with a count badge.
+/// </summary>
+public class ChannelListSource : IListDataSource
+{
+    private readonly List<string> _channelNames = [];
+    private readonly Dictionary<string, int> _unreadCounts = [];
+    private string _activeChannel = string.Empty;
+
+    public event NotifyCollectionChangedEventHandler? CollectionChanged;
+    public int Count => _channelNames.Count;
+    public int MaxItemLength { get; private set; }
+    public bool SuspendCollectionChangedEvent { get; set; }
+
+    private static readonly Attribute ActiveAttr = new(Color.White, Color.None);
+    private static readonly Attribute UnreadAttr = new(Color.BrightCyan, Color.None);
+    private static readonly Attribute NormalAttr = new(Color.DarkGray, Color.None);
+    private static readonly Attribute BadgeAttr = new(Color.BrightYellow, Color.None);
+
+    public void Update(List<string> channels, Dictionary<string, int> unread, string activeChannel)
+    {
+        _channelNames.Clear();
+        _channelNames.AddRange(channels);
+        _unreadCounts.Clear();
+        foreach (var kv in unread)
+            _unreadCounts[kv.Key] = kv.Value;
+        _activeChannel = activeChannel;
+        MaxItemLength = channels.Count > 0 ? channels.Max(c => c.Length + 6) : 0;
+        if (!SuspendCollectionChangedEvent)
+            CollectionChanged?.Invoke(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+    }
+
+    public bool IsMarked(int item) => false;
+    public void SetMark(int item, bool value) { }
+    public IList ToList() => _channelNames.Select(n => $"#{n}").ToList();
+
+    public void Render(ListView listView, bool selected, int item, int col, int row, int width, int viewportX = 0)
+    {
+        listView.Move(Math.Max(col - viewportX, 0), row);
+
+        var name = _channelNames[item];
+        var isActive = name == _activeChannel;
+        _unreadCounts.TryGetValue(name, out var unread);
+        var hasUnread = unread > 0;
+
+        var normalAttr = listView.GetAttributeForRole(VisualRole.Normal);
+        var focusAttr = listView.GetAttributeForRole(VisualRole.Focus);
+        var prefix = isActive ? "> " : "  ";
+        var channelText = $"#{name}";
+        var badge = hasUnread ? $" ({unread})" : "";
+
+        // Resolve Transparent backgrounds to the view's actual background
+        Attribute Resolve(Attribute attr) =>
+            attr.Background == Color.None ? attr with { Background = normalAttr.Background } : attr;
+
+        int drawnChars = 0;
+
+        if (selected)
+        {
+            listView.SetAttribute(focusAttr);
+            drawnChars = RenderHelpers.WriteText(listView, prefix + channelText + badge, drawnChars, width);
+        }
+        else
+        {
+            listView.SetAttribute(Resolve(isActive ? ActiveAttr : NormalAttr));
+            drawnChars = RenderHelpers.WriteText(listView, prefix, drawnChars, width);
+
+            listView.SetAttribute(Resolve(isActive ? ActiveAttr : hasUnread ? UnreadAttr : NormalAttr));
+            drawnChars = RenderHelpers.WriteText(listView, channelText, drawnChars, width);
+
+            if (hasUnread)
+            {
+                listView.SetAttribute(Resolve(BadgeAttr));
+                drawnChars = RenderHelpers.WriteText(listView, badge, drawnChars, width);
+            }
+        }
+
+        var fillAttr = selected ? focusAttr : normalAttr;
+        listView.SetAttribute(fillAttr);
+        for (int i = drawnChars; i < width; i++)
+            listView.AddStr(" ");
+    }
+
+    public void Dispose() { }
+}