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Clear screen line by line

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This commit is contained in:
Timothy Warren 2021-03-24 15:20:57 -04:00
parent bb6f7764a1
commit ca6e38fc51
2 changed files with 8 additions and 3 deletions
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4
internal/ansi/ansi.go
View File

@ -2,7 +2,11 @@ package ansi
import "fmt" import "fmt"
const ClearLine = "\x1b[K"
const ClearScreen = "\x1b[2J" const ClearScreen = "\x1b[2J"
const HideCursor = "\x1b[?25l"
const ShowCursor = "\x1b[?25h"
const ResetCursor = "\x1b[H" const ResetCursor = "\x1b[H"
func Code (s string) string { func Code (s string) string {

7
internal/editor/editor.go
View File

@ -26,12 +26,13 @@ func New() *editor {
func (e *editor) RefreshScreen() { func (e *editor) RefreshScreen() {
ab := newBuffer() ab := newBuffer()
ab.append(ansi.ClearScreen) ab.append(ansi.HideCursor)
ab.append(ansi.ResetCursor) ab.append(ansi.ResetCursor)
e.drawRows(ab) e.drawRows(ab)
ab.append(ansi.ResetCursor) ab.append(ansi.ResetCursor)
ab.append(ansi.ShowCursor)
terminal.Write(ab.toString()) terminal.Write(ab.toString())
} }
@ -41,8 +42,7 @@ func (e *editor) ProcessKeypress() bool {
// Clean up on exit // Clean up on exit
if ch == char.Ctrl('q') { if ch == char.Ctrl('q') {
terminal.Write(ansi.ClearScreen) terminal.Write(ansi.ClearScreen + ansi.ResetCursor)
terminal.Write(ansi.ResetCursor)
return false return false
} }
@ -53,6 +53,7 @@ func (e *editor) ProcessKeypress() bool {
func (e *editor) drawRows(ab *buffer) { func (e *editor) drawRows(ab *buffer) {
for y :=0; y < e.rows; y += 1 { for y :=0; y < e.rows; y += 1 {
ab.appendRune('~') ab.appendRune('~')
ab.append(ansi.ClearLine)
if y < (e.rows - 1) { if y < (e.rows - 1) {
ab.append("\r\n") ab.append("\r\n")