feat(input): expose state API, wire settings cog, add test hooks

HellionChat/Ui/Components/InputBar.cs

@@ -30,15 +30,19 @@ internal sealed class InputBar
     private readonly ThemeRegistry _themes;
     private readonly TokenResolver _resolver;
     private readonly ILogger<InputBar> _logger;
+    private readonly Action _onOpenSettings;
 
     private string _pendingMessage = string.Empty;
+    private bool _isFocused;
+    private bool? _isFocusedOverride; // Test-only; null = honour per-frame Draw() value.
 
     public InputBar(
         SymbolPicker symbolPicker,
         FontManager fonts,
         ThemeRegistry themes,
         TokenResolver resolver,
-        ILogger<InputBar> logger
+        ILogger<InputBar> logger,
+        Action onOpenSettings
     )
     {
         _symbolPicker = symbolPicker;
@@ -46,9 +50,22 @@ internal sealed class InputBar
         _themes = themes;
         _resolver = resolver;
         _logger = logger;
+        _onOpenSettings = onOpenSettings;
     }
 
     public string PendingMessage => _pendingMessage;
+    public int PendingLength => _pendingMessage.Length;
+
+    // IsFocused respects the test override first so a SelfTest can pin focus
+    // state without racing against per-frame ImGui.IsItemFocused() in Draw().
+    // Note: when MainWindow is closed, DrawInputField never runs, so
+    // _isFocused keeps the last value written by the previous draw pass.
+    // The consumer that actually pushes this state across the IPC boundary
+    // (TypingIpc.BuildState, see F3 Step 2) gates on Plugin.MainWindow.IsOpen
+    // itself, so the stale backing-field never leaks to subscribers. Mirroring
+    // the gate here would require an extra Plugin-backref in InputBar that the
+    // rest of the component doesn't need.
+    public bool IsFocused => _isFocusedOverride ?? _isFocused;
 
     public void ClearBuffer() => _pendingMessage = string.Empty;
 
@@ -163,6 +180,7 @@ internal sealed class InputBar
         {
             TrySend(activeTab);
         }
+        _isFocused = ImGui.IsItemFocused();
     }
 
     private void TrySend(Tab? activeTab)
@@ -212,10 +230,7 @@ internal sealed class InputBar
             ImGui.SameLine();
             if (ImGui.Button(FontAwesomeIcon.Cog.ToIconString()))
             {
-                // Settings toggle wires up when the plugin window registers
-                // its open handler; no-op until then so the button is
-                // visible without dragging a half-finished settings call
-                // into the component.
+                _onOpenSettings();
             }
             if (ImGui.IsItemHovered())
             {
@@ -235,4 +250,11 @@ internal sealed class InputBar
             }
         }
     }
+
+    // Test-only hook; do not call from production code.
+    internal void TestSetPendingMessageForSelfTest(string value) => _pendingMessage = value;
+
+    // Test-only hook; do not call from production code. Pass null to release the
+    // override and let Draw()'s ImGui.IsItemFocused() result take over again.
+    internal void TestSetFocusedForSelfTest(bool? value) => _isFocusedOverride = value;
 }