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package csi
import (
"fmt"
"os"
"os/exec"
"runtime"
)
const (
ansiCUUf = "\033[%vA" // Cursor (move) Up, formatted version (expects to be given a number)
ansiCUDf = "\033[%vB" // Cursor (move) Down, formated version (expects to be given a number)
ansiCUFf = "\033[%vC" // Cursor (move) Forward (to the right), formatted version (expects to be given a number)
ansiCUU = "\033[A" // Cursor (move) Up
ansiCUD = "\033[B" // Cursor (move) Down
ansiCUF = "\033[C" // Cursor (move) Forward (to the right)
ansiCNL = "\033[E" // Cursor (move) Next Line
ansiED = "\033[2J" // Erase in Display (clears entire screen)
ansiEL = "\033[K" // Erase in Line (clears from cursor to end of line)
ansiSCP = "\033[s" // Save Current Cursor Position
ansiRCP = "\033[u" // Restore Saved Cursor Position
)
func MoveCursorUpN(times int) {
fmt.Printf(ansiCUUf, times)
}
func MoveCursorDownN(times int) {
fmt.Printf(ansiCUDf, times)
}
func MoveCursorRightN(times int) {
fmt.Printf(ansiCUFf, times)
}
func MoveCursorUp() {
fmt.Print(ansiCUU)
}
func MoveCursorDown() {
fmt.Print(ansiCUD)
}
func MoveCursorRight() {
fmt.Printf(ansiCUF)
}
func MoveCursorToBeginningOfLine() {
fmt.Print(ansiCNL)
}
func ClearLine() {
fmt.Print(ansiEL)
}
var blockClearing = false
func ClearScreen() {
if blockClearing {
blockClearing = false
return
}
if runtime.GOOS == "windows" {
cmd := exec.Command("cmd", "/c", "cls")
cmd.Stdout = os.Stdout
cmd.Run()
} else {
fmt.Println(ansiED)
}
}
// The next time that ClearScreen is called, it won't clear the screen
func BlockClearScreenNextTime() {
blockClearing = true
}
func EraseToEndOfLine() {
fmt.Print(ansiEL)
}
func SaveCursorPosition() {
fmt.Print(ansiSCP)
}
func RestoreCursorPosition() {
fmt.Print(ansiRCP)
}
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