Add AutocompleteContext

Terminal.Gui/Core/Autocomplete/AutocompleteBase.cs

@@ -6,6 +6,17 @@ using System.Text;
 using Rune = System.Rune;
 
 namespace Terminal.Gui {
+	public class AutocompleteContext
+	{
+		public List<Rune> CurrentLine { get; set; }
+		public int Idx { get; set; }
+
+		public AutocompleteContext (List<Rune> currentLine, int idx)
+		{
+			CurrentLine = currentLine;
+			Idx = idx;
+		}
+	}
 
 	public abstract class AutocompleteBase : IAutocomplete {
 
@@ -65,9 +76,9 @@ namespace Terminal.Gui {
 
 
 		/// <inheritdoc/>
-		public virtual void GenerateSuggestions (List<Rune> currentLine, int idx)
+		public virtual void GenerateSuggestions (AutocompleteContext context)
 		{
-			Suggestions = SuggestionGenerator.GenerateSuggestions (currentLine, idx).ToList ().AsReadOnly ();
+			Suggestions = SuggestionGenerator.GenerateSuggestions (context).ToList ().AsReadOnly ();
 
 			EnsureSelectedIdxIsValid ();
 		}

Terminal.Gui/Core/Autocomplete/IAutocomplete.cs

@@ -105,9 +105,9 @@ namespace Terminal.Gui {
 
 		/// <summary>
 		/// Populates <see cref="Suggestions"/> with all <see cref="Suggestion"/> 
-		/// proposed by <see cref="SuggestionGenerator"/> at the given <paramref name="idx"/>
-		/// of <paramref name="currentLine"/>
+		/// proposed by <see cref="SuggestionGenerator"/> at the given <paramref name="context"/>
+		/// (cursor position)
 		/// </summary>
-		void GenerateSuggestions (List<Rune> currentLine, int idx);
+		void GenerateSuggestions (AutocompleteContext context);
 	}
 }

Terminal.Gui/Core/Autocomplete/ISuggestionGenerator.cs

@@ -8,10 +8,9 @@ namespace Terminal.Gui {
 	public interface ISuggestionGenerator {
 
 		/// <summary>
-		/// Generates autocomplete <see cref="Suggestion"/> based on a given cursor location <paramref name="idx"/>
-		/// within a <paramref name="currentLine"/>
+		/// Generates autocomplete <see cref="Suggestion"/> based on a given <paramref name="context"/>
 		/// </summary>
-		IEnumerable<Suggestion> GenerateSuggestions (List<Rune> currentLine, int idx);
+		IEnumerable<Suggestion> GenerateSuggestions (AutocompleteContext context);
 
 		bool IsWordChar (Rune rune);
 

Terminal.Gui/Core/Autocomplete/SingleWordSuggestionGenerator.cs

@@ -12,14 +12,14 @@ namespace Terminal.Gui {
 		/// <returns></returns>
 		public virtual List<string> AllSuggestions { get; set; } = new List<string> ();
 
-		public IEnumerable<Suggestion> GenerateSuggestions (List<Rune> currentLine, int idx)
+		public IEnumerable<Suggestion> GenerateSuggestions (AutocompleteContext context)
 		{
 			// if there is nothing to pick from
 			if (AllSuggestions.Count == 0) {
 				return Enumerable.Empty<Suggestion> ();
 			}
 
-			var currentWord = IdxToWord (currentLine, idx);
+			var currentWord = IdxToWord (context.CurrentLine, context.Idx);
 
 			if (string.IsNullOrWhiteSpace (currentWord)) {
 				return Enumerable.Empty<Suggestion> ();

Terminal.Gui/Views/TextField.cs

@@ -486,7 +486,9 @@ namespace Terminal.Gui {
 			var currentLine = Text.ToRuneList ();
 			var cursorPosition = Math.Min (this.CursorPosition, currentLine.Count);
 
-			Autocomplete.GenerateSuggestions(currentLine,cursorPosition);
+			Autocomplete.GenerateSuggestions(
+				new AutocompleteContext(currentLine,cursorPosition)
+				);
 		}
 
 		/// <inheritdoc/>

Terminal.Gui/Views/TextView.cs

@@ -2440,7 +2440,9 @@ namespace Terminal.Gui {
 		{
 			var currentLine = this.GetCurrentLine ();
 			var cursorPosition = Math.Min (this.CurrentColumn, currentLine.Count);
-			Autocomplete.GenerateSuggestions(currentLine,cursorPosition);
+			Autocomplete.GenerateSuggestions(
+				new AutocompleteContext(currentLine,cursorPosition)
+				);
 		}
 
 		/// <inheritdoc/>

UnitTests/Views/AutocompleteTests.cs

@@ -30,7 +30,9 @@ namespace Terminal.Gui.ViewTests {
 			tv.InsertText ("co");
 
 			ac.HostControl = tv;
-			ac.GenerateSuggestions (tv.Text.ToRuneList(),2);
+			ac.GenerateSuggestions (
+				new AutocompleteContext(
+				tv.Text.ToRuneList(),2));
 
 			Assert.Equal (2, ac.Suggestions.Count);
 			Assert.Equal ("const", ac.Suggestions [0].Title);