feat: search dialog to navigate app

2026-09-05 23:34:09 +02:00 · 2026-04-20 17:42:04 +02:00
parent 3091a146eb
commit aa6599a4e0
3 changed files with 293 additions and 1 deletions
@@ -0,0 +1,87 @@
+using EchoHub.Client.UI.Chat;
+using EchoHub.Client.UI.Dialogs;
+
+using System.Collections;
+using System.Collections.Specialized;
+
+using Terminal.Gui.Drawing;
+using Terminal.Gui.Text;
+using Terminal.Gui.Views;
+
+using Attribute = Terminal.Gui.Drawing.Attribute;
+
+namespace EchoHub.Client.UI.ListSources;
+
+/// <summary>
+/// List data source for the search dialog with filtering and colored rendering.
+/// </summary>
+public class SearchListSource(List<SearchResult> items) : IListDataSource
+{
+    private readonly List<SearchResult> _allItems = items;
+    private List<SearchResult> _filtered = [.. items];
+
+    private static readonly Attribute ChannelAttribute = new(Color.BrightCyan, Color.None);
+    private static readonly Attribute ActionAttribute = new(Color.White, Color.None);
+
+    public event NotifyCollectionChangedEventHandler? CollectionChanged;
+    public int Count => _filtered.Count;
+    public int MaxItemLength => _filtered.Count > 0 ? _filtered.Max(i => i.Label.GetColumns()) : 0;
+    public bool SuspendCollectionChangedEvent { get; set; }
+
+    public void Filter(string query)
+    {
+        if (string.IsNullOrWhiteSpace(query))
+        {
+            _filtered = [.. _allItems];
+        }
+        else
+        {
+            _filtered = [.. _allItems.Where(i =>
+                i.Label.Contains(query, StringComparison.OrdinalIgnoreCase)
+                || i.Key.Contains(query, StringComparison.OrdinalIgnoreCase))];
+        }
+
+        if (!SuspendCollectionChangedEvent)
+            CollectionChanged?.Invoke(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+    }
+
+    public SearchResult? GetItem(int index) => index >= 0 && index < _filtered.Count ? _filtered[index] : null;
+
+    public bool IsMarked(int item) => false;
+    public void SetMark(int item, bool value) { }
+    public IList ToList() => _filtered.Select(i => (object)i.Label).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 entry = _filtered[item];
+        var fillAttr = listView.GetAttributeForRole(selected ? VisualRole.Focus : VisualRole.Normal);
+
+        Attribute itemAttr;
+        if (selected)
+        {
+            itemAttr = fillAttr;
+        }
+        else
+        {
+            var raw = entry.Type switch
+            {
+                SearchResultType.Channel => ChannelAttribute,
+                SearchResultType.Action => ActionAttribute,
+                _ => fillAttr
+            };
+            itemAttr = raw.Background == Color.None ? raw with { Background = fillAttr.Background } : raw;
+        }
+
+        listView.SetAttribute(itemAttr);
+
+        var drawn = RenderHelpers.WriteText(listView, entry.Label, 0, width);
+
+        listView.SetAttribute(fillAttr);
+        for (var i = drawn; i < width; i++)
+            listView.AddStr(" ");
+    }
+
+    public void Dispose() { }
+}