From 0eaea5cc5d0e6be804152ca09f4a76ad4c7887dd Mon Sep 17 00:00:00 2001
From: Christian Rocha <christian@rocha.is>
Date: Tue, 16 Jun 2020 14:32:00 -0400
Subject: [PATCH] Use as much terminal movement from termenv as we can

---
 viewport/renderer.go | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/viewport/renderer.go b/viewport/renderer.go
index e4959c5..c9927e0 100644
--- a/viewport/renderer.go
+++ b/viewport/renderer.go
@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"io"
 	"strings"
+
+	te "github.com/muesli/termenv"
 )
 
 type renderer struct {
@@ -61,28 +63,26 @@ func (r *renderer) insertBottom(lines []string) {
 
 // Terminal Control
 
-const csi = "\x1b["
-
 func changeScrollingRegion(w io.Writer, top, bottom int) {
-	fmt.Fprintf(w, csi+"%d;%dr", top, bottom)
+	fmt.Fprintf(w, te.CSI+"%d;%dr", top, bottom)
 }
 
 func moveTo(w io.Writer, row, col int) {
-	fmt.Fprintf(w, csi+"%d;%dH", row, col)
+	fmt.Fprintf(w, te.CSI+te.CursorPositionSeq, row, col)
 }
 
 func cursorDown(w io.Writer, numLines int) {
-	fmt.Fprintf(w, csi+"%dB", numLines)
+	fmt.Fprintf(w, te.CSI+te.CursorDownSeq, numLines)
 }
 
 func cursorDownString(numLines int) string {
-	return fmt.Sprintf(csi+"%dB", numLines)
+	return fmt.Sprintf(te.CSI+te.CursorDownSeq, numLines)
 }
 
 func clearLine(w io.Writer) {
-	fmt.Fprint(w, csi+"2K")
+	fmt.Fprintf(w, te.CSI+te.EraseLineSeq, 2)
 }
 
 func insertLine(w io.Writer, numLines int) {
-	fmt.Fprintf(w, csi+"%dL", numLines)
+	fmt.Fprintf(w, te.CSI+"%dL", numLines)
 }