From fba59f60845843f9e39433b2e4ac05f3091dc6cb Mon Sep 17 00:00:00 2001
From: BDisp <bd.bdisp@gmail.com>
Date: Sun, 24 May 2020 00:44:55 +0100
Subject: [PATCH] Patch to bypass a wrong invalid date with DateTime.

---
 Terminal.Gui/Views/DateField.cs    | 32 +++++++++++++++++++++++++++++-
 UICatalog/Scenarios/TimeAndDate.cs | 28 ++++++++++++--------------
 2 files changed, 44 insertions(+), 16 deletions(-)

diff --git a/Terminal.Gui/Views/DateField.cs b/Terminal.Gui/Views/DateField.cs
index 46e9c1231..bbc4accd4 100644
--- a/Terminal.Gui/Views/DateField.cs
+++ b/Terminal.Gui/Views/DateField.cs
@@ -61,10 +61,15 @@ namespace Terminal.Gui {
 
 		void DateField_Changed (object sender, ustring e)
 		{
-			if (!DateTime.TryParseExact (Text.ToString (), Format, CultureInfo.CurrentCulture, DateTimeStyles.None, out DateTime result))
+			if (!DateTime.TryParseExact (GetDate (Text).ToString(), GetInvarianteFormat (), CultureInfo.CurrentCulture, DateTimeStyles.None, out DateTime result))
 				Text = e;
 		}
 
+		string GetInvarianteFormat ()
+		{
+			return $"MM{sepChar}dd{sepChar}yyyy";
+		}
+
 		string GetLongFormat (string lf)
 		{
 			ustring [] frm = ustring.Make (lf).Split (ustring.Make (sepChar));
@@ -191,6 +196,31 @@ namespace Terminal.Gui {
 			return date;
 		}
 
+		ustring GetDate (ustring text)
+		{
+			ustring [] vals = text.Split (ustring.Make (sepChar));
+			ustring [] frm = ustring.Make (Format).Split (ustring.Make (sepChar));
+			ustring [] date = { null, null, null };
+
+			for (int i = 0; i < frm.Length; i++) {
+				if (frm [i].Contains ("M")) {
+					date [0] = vals [i].TrimSpace ();
+				} else if (frm [i].Contains ("d")) {
+					date [1] = vals [i].TrimSpace ();
+				} else {
+					var year = vals [i].TrimSpace ();
+					if (year.Length == 2) {
+						var y = DateTime.Now.Year.ToString ();
+						date [2] = y.Substring (0, 2) + year.ToString ();
+					} else {
+						date [2] = vals [i].TrimSpace ();
+					}
+				}
+			}
+			return date [0] + ustring.Make (sepChar) + date [1] + ustring.Make (sepChar) + date [2];
+
+		}
+
 		int GetFormatIndex (ustring [] fm, string t)
 		{
 			int idx = -1;
diff --git a/UICatalog/Scenarios/TimeAndDate.cs b/UICatalog/Scenarios/TimeAndDate.cs
index ebbf32333..d24aab005 100644
--- a/UICatalog/Scenarios/TimeAndDate.cs
+++ b/UICatalog/Scenarios/TimeAndDate.cs
@@ -8,36 +8,34 @@ namespace UICatalog {
 	class TimeAndDate : Scenario {
 		public override void Setup ()
 		{
-			// NOTE: The TimeField control is not ready for prime-time. See #246
-
-			var longTime = new TimeField (0, 0, DateTime.Now, isShort: false) {
-				// BUGBUG: TimeField does not support Computed Layout
+			var longTime = new TimeField (DateTime.Now) {
 				X = Pos.Center (),
 				Y = 2,
+				IsShortFormat = false,
 				ReadOnly = false,
 			};
 			Win.Add (longTime);
 
-			var shortTime = new TimeField (0, 2, DateTime.Now, isShort: true) {
-				// BUGBUG: TimeField does not support Computed Layout
+			var shortTime = new TimeField (DateTime.Now) {
 				X = Pos.Center (),
 				Y = Pos.Bottom(longTime) + 1,
-				ReadOnly = true,
+				IsShortFormat = true,
+				ReadOnly = false,
 			};
 			Win.Add (shortTime);
 
-			var shortDate = new DateField (0, 2, DateTime.Now, isShort: true) {
-				// BUGBUG: TimeField does not support Computed Layout
+			var shortDate = new DateField (DateTime.Now) {
 				X = Pos.Center (),
 				Y = Pos.Bottom (shortTime) + 1,
+				IsShortFormat = true,
 				ReadOnly = true,
 			};
 			Win.Add (shortDate);
 
-			var longDate = new TimeField (0, 2, DateTime.Now, isShort: true) {
-				// BUGBUG: TimeField does not support Computed Layout
+			var longDate = new DateField (DateTime.Now) {
 				X = Pos.Center (),
 				Y = Pos.Bottom (shortDate) + 1,
+				IsShortFormat = false,
 				ReadOnly = true,
 			};
 			Win.Add (longDate);
@@ -49,14 +47,14 @@ namespace UICatalog {
 					longTime.ReadOnly = !longTime.ReadOnly;
 					shortTime.ReadOnly = !shortTime.ReadOnly;
 
-					//longTime.IsShortFormat = !longTime.IsShortFormat;
-					//shortTime.IsShortFormat = !shortTime.IsShortFormat;
+					longTime.IsShortFormat = !longTime.IsShortFormat;
+					shortTime.IsShortFormat = !shortTime.IsShortFormat;
 
 					longDate.ReadOnly = !longDate.ReadOnly;
 					shortDate.ReadOnly = !shortDate.ReadOnly;
 
-					//longDate.IsShortFormat = !longDate.IsShortFormat;
-					//shortDate.IsShortFormat = !shortDate.IsShortFormat;
+					longDate.IsShortFormat = !longDate.IsShortFormat;
+					shortDate.IsShortFormat = !shortDate.IsShortFormat;
 				}
 			});
 		}