fix(term): ansi: default cursor/screen sequence values

charmbracelet · Mar 22, 2024 · ebda89b · ebda89b
1 parent 7faadd0
commit ebda89b
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Showing 2 changed files with 10 additions and 12 deletions.
diff --git a/exp/term/ansi/cursor.go b/exp/term/ansi/cursor.go
@@ -121,14 +121,13 @@ func CursorPreviousLine(n int) string {
 //
 // See: https://vt100.net/docs/vt510-rm/CUP.html
 func MoveCursor(row, col int) string {
-	var r, c string
-	if row > 1 {
-		r = strconv.Itoa(row)
+	if row < 0 {
+		row = 0
 	}
-	if col > 1 {
-		c = strconv.Itoa(col)
+	if col < 0 {
+		col = 0
 	}
-	return "\x1b[" + r + ";" + c + "H"
+	return "\x1b[" + strconv.Itoa(row) + ";" + strconv.Itoa(col) + "H"
 }
 
 // MoveCursorZero is a sequence for moving the cursor to the upper left corner

diff --git a/exp/term/ansi/screen.go b/exp/term/ansi/screen.go
@@ -116,12 +116,11 @@ func DeleteLine(n int) string {
 //
 // See: https://vt100.net/docs/vt510-rm/DECSTBM.html
 func SetScrollingRegion(t, b int) string {
-	var ts, bs string
-	if t > 1 {
-		ts = strconv.Itoa(t)
+	if t < 0 {
+		t = 0
 	}
-	if b > 1 {
-		bs = strconv.Itoa(b)
+	if b < 0 {
+		b = 0
 	}
-	return "\x1b[" + ts + ";" + bs + "r"
+	return "\x1b[" + strconv.Itoa(t) + ";" + strconv.Itoa(b) + "r"
 }