Fixes #3771. TextView doesn't consider no-printable rune in draw and cursor position.

Terminal.Gui/Drawing/Cell.cs

@@ -4,19 +4,18 @@
 ///     Represents a single row/column in a Terminal.Gui rendering surface (e.g. <see cref="LineCanvas"/> and
 ///     <see cref="ConsoleDriver"/>).
 /// </summary>
-public record struct Cell ()
+public record struct Cell (Attribute? Attribute = null, bool IsDirty = false, Rune Rune = default)
 {
-
     /// <summary>The attributes to use when drawing the Glyph.</summary>
-    public Attribute? Attribute { get; set; } = null;
+    public Attribute? Attribute { get; set; } = Attribute;
 
     /// <summary>
     ///     Gets or sets a value indicating whether this <see cref="T:Terminal.Gui.Cell"/> has been modified since the
     ///     last time it was drawn.
     /// </summary>
-    public bool IsDirty { get; set; } = false;
+    public bool IsDirty { get; set; } = IsDirty;
 
-    private Rune _rune = default;
+    private Rune _rune = Rune;
 
     /// <summary>The character to display. If <see cref="Rune"/> is <see langword="null"/>, then <see cref="Rune"/> is ignored.</summary>
     public Rune Rune
@@ -29,6 +28,8 @@ public Rune Rune
         }
     }
 
+    private List<Rune> _combiningMarks;
+
     /// <summary>
     ///     The combining marks for <see cref="Rune"/> that when combined makes this Cell a combining sequence. If
     ///     <see cref="CombiningMarks"/> empty, then <see cref="CombiningMarks"/> is ignored.
@@ -37,8 +38,153 @@ public Rune Rune
     ///     Only valid in the rare case where <see cref="Rune"/> is a combining sequence that could not be normalized to a
     ///     single Rune.
     /// </remarks>
-    internal List<Rune> CombiningMarks { get; } = new ();
+    internal List<Rune> CombiningMarks
+    {
+        get => _combiningMarks ?? [];
+        private set => _combiningMarks = value ?? [];
+    }
 
     /// <inheritdoc/>
     public override string ToString () { return $"[{Rune}, {Attribute}]"; }
+
+    /// <summary>Converts the string into a <see cref="List{Cell}"/>.</summary>
+    /// <param name="str">The string to convert.</param>
+    /// <param name="attribute">The <see cref="Gui.ColorScheme"/> to use.</param>
+    /// <returns></returns>
+    public static List<Cell> ToCellList (string str, Attribute? attribute = null)
+    {
+        List<Cell> cells = new ();
+
+        foreach (Rune rune in str.EnumerateRunes ())
+        {
+            cells.Add (new () { Rune = rune, Attribute = attribute });
+        }
+
+        return cells;
+    }
+
+    /// <summary>
+    ///     Splits a string into a List that will contain a <see cref="List{Cell}"/> for each line.
+    /// </summary>
+    /// <param name="content">The string content.</param>
+    /// <param name="attribute">The color scheme.</param>
+    /// <returns>A <see cref="List{Cell}"/> for each line.</returns>
+    public static List<List<Cell>> StringToLinesOfCells (string content, Attribute? attribute = null)
+    {
+        List<Cell> cells = content.EnumerateRunes ()
+                                  .Select (x => new Cell { Rune = x, Attribute = attribute })
+                                  .ToList ();
+
+        return SplitNewLines (cells);
+    }
+
+    /// <summary>Converts a <see cref="Cell"/> generic collection into a string.</summary>
+    /// <param name="cells">The enumerable cell to convert.</param>
+    /// <returns></returns>
+    public static string ToString (IEnumerable<Cell> cells)
+    {
+        var str = string.Empty;
+
+        foreach (Cell cell in cells)
+        {
+            str += cell.Rune.ToString ();
+        }
+
+        return str;
+    }
+
+    /// <summary>Converts a <see cref="List{Cell}"/> generic collection into a string.</summary>
+    /// <param name="cellsList">The enumerable cell to convert.</param>
+    /// <returns></returns>
+    public static string ToString (List<List<Cell>> cellsList)
+    {
+        var str = string.Empty;
+
+        for (var i = 0; i < cellsList.Count; i++)
+        {
+            IEnumerable<Cell> cellList = cellsList [i];
+            str += ToString (cellList);
+
+            if (i + 1 < cellsList.Count)
+            {
+                str += Environment.NewLine;
+            }
+        }
+
+        return str;
+    }
+
+    // Turns the string into cells, this does not split the contents on a newline if it is present.
+
+    internal static List<Cell> StringToCells (string str, Attribute? attribute = null)
+    {
+        List<Cell> cells = [];
+
+        foreach (Rune rune in str.ToRunes ())
+        {
+            cells.Add (new () { Rune = rune, Attribute = attribute });
+        }
+
+        return cells;
+    }
+
+    internal static List<Cell> ToCells (IEnumerable<Rune> runes, Attribute? attribute = null)
+    {
+        List<Cell> cells = new ();
+
+        foreach (Rune rune in runes)
+        {
+            cells.Add (new () { Rune = rune, Attribute = attribute });
+        }
+
+        return cells;
+    }
+
+    private static List<List<Cell>> SplitNewLines (List<Cell> cells)
+    {
+        List<List<Cell>> lines = [];
+        int start = 0, i = 0;
+        var hasCR = false;
+
+        // ASCII code 13 = Carriage Return.
+        // ASCII code 10 = Line Feed.
+        for (; i < cells.Count; i++)
+        {
+            if (cells [i].Rune.Value == 13)
+            {
+                hasCR = true;
+
+                continue;
+            }
+
+            if (cells [i].Rune.Value == 10)
+            {
+                if (i - start > 0)
+                {
+                    lines.Add (cells.GetRange (start, hasCR ? i - 1 - start : i - start));
+                }
+                else
+                {
+                    lines.Add (StringToCells (string.Empty));
+                }
+
+                start = i + 1;
+                hasCR = false;
+            }
+        }
+
+        if (i - start >= 0)
+        {
+            lines.Add (cells.GetRange (start, i - start));
+        }
+
+        return lines;
+    }
+
+    /// <summary>
+    ///     Splits a rune cell list into a List that will contain a <see cref="List{Cell}"/> for each line.
+    /// </summary>
+    /// <param name="cells">The cells list.</param>
+    /// <returns></returns>
+    public static List<List<Cell>> ToCells (List<Cell> cells) { return SplitNewLines (cells); }
 }

Terminal.Gui/Views/RuneCellEventArgs.cs → Terminal.Gui/Drawing/CellEventArgs.cs

@@ -1,27 +1,27 @@
 namespace Terminal.Gui;
 
-/// <summary>Args for events that relate to a specific <see cref="RuneCell"/>.</summary>
-public class RuneCellEventArgs
+/// <summary>Args for events that relate to a specific <see cref="Cell"/>.</summary>
+public record struct CellEventArgs
 {
-    /// <summary>Creates a new instance of the <see cref="RuneCellEventArgs"/> class.</summary>
+    /// <summary>Creates a new instance of the <see cref="CellEventArgs"/> class.</summary>
     /// <param name="line">The line.</param>
     /// <param name="col">The col index.</param>
     /// <param name="unwrappedPosition">The unwrapped row and col index.</param>
-    public RuneCellEventArgs (List<RuneCell> line, int col, (int Row, int Col) unwrappedPosition)
+    public CellEventArgs (List<Cell> line, int col, (int Row, int Col) unwrappedPosition)
     {
         Line = line;
         Col = col;
         UnwrappedPosition = unwrappedPosition;
     }
 
-    /// <summary>The index of the RuneCell in the line.</summary>
+    /// <summary>The index of the Cell in the line.</summary>
     public int Col { get; }
 
-    /// <summary>The list of runes the RuneCell is part of.</summary>
-    public List<RuneCell> Line { get; }
+    /// <summary>The list of runes the Cell is part of.</summary>
+    public List<Cell> Line { get; }
 
     /// <summary>
-    ///     The unwrapped row and column index into the text containing the RuneCell. Unwrapped means the text without
+    ///     The unwrapped row and column index into the text containing the Cell. Unwrapped means the text without
     ///     word wrapping or other visual formatting having been applied.
     /// </summary>
     public (int Row, int Col) UnwrappedPosition { get; }

Terminal.Gui/Drawing/LineCanvas.cs

@@ -138,7 +138,7 @@ public void AddLine (
         int length,
         Orientation orientation,
         LineStyle style,
-        Attribute? attribute = default
+        Attribute? attribute = null
     )
     {
         _cachedViewport = Rectangle.Empty;

Terminal.Gui/Drawing/StraightLine.cs

@@ -16,7 +16,7 @@ public StraightLine (
         int length,
         Orientation orientation,
         LineStyle style,
-        Attribute? attribute = default
+        Attribute? attribute = null
     )
     {
         Start = start;

Terminal.Gui/Resources/Strings.fr-FR.resx

@@ -117,27 +117,27 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <data name="ctxSelectAll" xml:space="preserve">
+    <value>Tout _sélectionner</value>
+  </data>
+  <data name="ctxDeleteAll" xml:space="preserve">
+    <value>_Tout supprimer</value>
+  </data>
   <data name="ctxCopy" xml:space="preserve">
     <value>_Copier</value>
   </data>
   <data name="ctxCut" xml:space="preserve">
     <value>Co_uper</value>
   </data>
-  <data name="ctxDeleteAll" xml:space="preserve">
-    <value>_Tout supprimer</value>
-  </data>
   <data name="ctxPaste" xml:space="preserve">
     <value>C_oller</value>
   </data>
-  <data name="ctxRedo" xml:space="preserve">
-    <value>_Rétablir</value>
-  </data>
-  <data name="ctxSelectAll" xml:space="preserve">
-    <value>Tout _sélectionner</value>
-  </data>
   <data name="ctxUndo" xml:space="preserve">
     <value>_Annuler</value>
   </data>
+  <data name="ctxRedo" xml:space="preserve">
+    <value>_Rétablir</value>
+  </data>
   <data name="fdDirectory" xml:space="preserve">
     <value>_Dossier</value>
   </data>
@@ -168,16 +168,19 @@
   <data name="wzNext" xml:space="preserve">
     <value>Prochai_n...</value>
   </data>
+  <data name="btnOpen" xml:space="preserve">
+    <value>Ouvrir</value>
+  </data>
   <data name="btnSave" xml:space="preserve">
     <value>Enregistrer</value>
   </data>
   <data name="btnSaveAs" xml:space="preserve">
     <value>E_nregistrer sous</value>
   </data>
-  <data name="btnOpen" xml:space="preserve">
-    <value>Ouvrir</value>
-  </data>
   <data name="dpTitle" xml:space="preserve">
     <value>Sélecteur de Date</value>
   </data>
+  <data name="ctxColors" xml:space="preserve">
+    <value>Cou_leurs</value>
+  </data>
 </root>