forked from toolshed/abra
127 lines
2.7 KiB
Go
127 lines
2.7 KiB
Go
package ansi
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import "strconv"
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// EraseDisplay (ED) clears the screen or parts of the screen. Possible values:
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//
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// 0: Clear from cursor to end of screen.
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// 1: Clear from cursor to beginning of the screen.
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// 2: Clear entire screen (and moves cursor to upper left on DOS).
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// 3: Clear entire screen and delete all lines saved in the scrollback buffer.
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//
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// CSI <n> J
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//
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// See: https://vt100.net/docs/vt510-rm/ED.html
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func EraseDisplay(n int) string {
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if n < 0 {
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n = 0
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}
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return "\x1b[" + strconv.Itoa(n) + "J"
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}
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// EraseDisplay constants.
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// These are the possible values for the EraseDisplay function.
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const (
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EraseDisplayRight = "\x1b[0J"
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EraseDisplayLeft = "\x1b[1J"
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EraseEntireDisplay = "\x1b[2J"
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)
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// EraseLine (EL) clears the current line or parts of the line. Possible values:
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//
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// 0: Clear from cursor to end of line.
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// 1: Clear from cursor to beginning of the line.
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// 2: Clear entire line.
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//
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// The cursor position is not affected.
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//
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// CSI <n> K
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//
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// See: https://vt100.net/docs/vt510-rm/EL.html
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func EraseLine(n int) string {
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if n < 0 {
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n = 0
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}
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return "\x1b[" + strconv.Itoa(n) + "K"
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}
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// EraseLine constants.
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// These are the possible values for the EraseLine function.
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const (
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EraseLineRight = "\x1b[0K"
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EraseLineLeft = "\x1b[1K"
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EraseEntireLine = "\x1b[2K"
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)
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// ScrollUp (SU) scrolls the screen up n lines. New lines are added at the
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// bottom of the screen.
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//
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// CSI <n> S
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//
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// See: https://vt100.net/docs/vt510-rm/SU.html
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func ScrollUp(n int) string {
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var s string
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if n > 1 {
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s = strconv.Itoa(n)
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}
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return "\x1b[" + s + "S"
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}
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// ScrollDown (SD) scrolls the screen down n lines. New lines are added at the
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// top of the screen.
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//
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// CSI <n> T
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//
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// See: https://vt100.net/docs/vt510-rm/SD.html
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func ScrollDown(n int) string {
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var s string
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if n > 1 {
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s = strconv.Itoa(n)
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}
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return "\x1b[" + s + "T"
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}
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// InsertLine (IL) inserts n blank lines at the current cursor position.
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// Existing lines are moved down.
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//
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// CSI <n> L
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//
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// See: https://vt100.net/docs/vt510-rm/IL.html
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func InsertLine(n int) string {
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var s string
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if n > 1 {
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s = strconv.Itoa(n)
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}
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return "\x1b[" + s + "L"
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}
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// DeleteLine (DL) deletes n lines at the current cursor position. Existing
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// lines are moved up.
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//
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// CSI <n> M
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//
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// See: https://vt100.net/docs/vt510-rm/DL.html
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func DeleteLine(n int) string {
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var s string
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if n > 1 {
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s = strconv.Itoa(n)
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}
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return "\x1b[" + s + "M"
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}
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// SetScrollingRegion (DECSTBM) sets the top and bottom margins for the scrolling
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// region. The default is the entire screen.
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//
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// CSI <top> ; <bottom> r
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//
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// See: https://vt100.net/docs/vt510-rm/DECSTBM.html
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func SetScrollingRegion(t, b int) string {
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if t < 0 {
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t = 0
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}
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if b < 0 {
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b = 0
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}
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return "\x1b[" + strconv.Itoa(t) + ";" + strconv.Itoa(b) + "r"
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}
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