From 4b17588374703e310ed6da750d3d28cad1bdbd10 Mon Sep 17 00:00:00 2001
From: Chip Locke <wd@teleri.net>
Date: Tue, 27 Nov 2018 02:16:59 -0800
Subject: [PATCH] fix erase commands to respect SGR values (fixes weird buffer
 corruption from vim)

---
 src/ConsoleBuffer/Buffer.cs | 15 ++++++++++++---
 src/ConsoleBuffer/Line.cs   | 10 ++--------
 2 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/src/ConsoleBuffer/Buffer.cs b/src/ConsoleBuffer/Buffer.cs
index a371a8e..155aee4 100644
--- a/src/ConsoleBuffer/Buffer.cs
+++ b/src/ConsoleBuffer/Buffer.cs
@@ -298,7 +298,9 @@ private void HandleEraseCharacter(Commands.EraseCharacter ech)
             var x = this.cursorX;
             for (var c = 0; c < ech.Count; ++c)
             {
-                this.lines[y].SetGlyph(x, 0x20);
+                var eraseChar = this.characterTemplate;
+                eraseChar.Glyph = 0x20;
+                this.lines[y].Set(x, eraseChar);
                 ++x;
                 if (x == this.Width)
                 {
@@ -332,9 +334,14 @@ private void HandleEraseInDisplay(Commands.EraseIn eid)
                 return;
             }
 
+            var eraseChar = this.characterTemplate;
+            eraseChar.Glyph = 0x20;
             for (var y = startY; y <= endY; ++y)
             {
-                this.lines[y].Clear();
+                for (var x = 0; x < this.lines[y].Length; ++x)
+                {
+                    this.lines[y].Set(x, eraseChar);
+                }
             }
         }
 
@@ -359,9 +366,11 @@ private void HandleEraseInLine(Commands.EraseIn eil)
                 return;
             }
 
+            var eraseChar = this.characterTemplate;
+            eraseChar.Glyph = 0x20;
             for (var x = startX; x <= endX; ++x)
             {
-                this.lines[this.CurrentLine].SetGlyph(x, 0x20);
+                this.lines[this.CurrentLine].Set(x, eraseChar);
             }
         }
 
diff --git a/src/ConsoleBuffer/Line.cs b/src/ConsoleBuffer/Line.cs
index c6599fc..c54153b 100644
--- a/src/ConsoleBuffer/Line.cs
+++ b/src/ConsoleBuffer/Line.cs
@@ -8,6 +8,8 @@ public sealed class Line : IEnumerable<Character>
     {
         private readonly List<Character> chars;
 
+        public int Length => this.chars.Count;
+
         public Line()
         {
             var hintSize = 80;
@@ -54,14 +56,6 @@ public void SetGlyph(int pos, int glyph)
             this.chars[pos] = current;
         }
 
-        public void Clear()
-        {
-            for (var x = 0; x < this.chars.Count; ++x)
-            {
-                this.SetGlyph(x, 0x20);
-            }
-        }
-
         private void Extend(int pos)
         {
             while (this.chars.Count <= pos)