chore: vendor

vendor/github.com/charmbracelet/x/ansi/screen.go

@@ -0,0 +1,126 @@
+package ansi
+
+import "strconv"
+
+// EraseDisplay (ED) clears the screen or parts of the screen. Possible values:
+//
+//	 0: Clear from cursor to end of screen.
+//	 1: Clear from cursor to beginning of the screen.
+//	 2: Clear entire screen (and moves cursor to upper left on DOS).
+//	 3: Clear entire screen and delete all lines saved in the scrollback buffer.
+//
+//	CSI <n> J
+//
+// See: https://vt100.net/docs/vt510-rm/ED.html
+func EraseDisplay(n int) string {
+	if n < 0 {
+		n = 0
+	}
+	return "\x1b[" + strconv.Itoa(n) + "J"
+}
+
+// EraseDisplay constants.
+// These are the possible values for the EraseDisplay function.
+const (
+	EraseDisplayRight  = "\x1b[0J"
+	EraseDisplayLeft   = "\x1b[1J"
+	EraseEntireDisplay = "\x1b[2J"
+)
+
+// EraseLine (EL) clears the current line or parts of the line. Possible values:
+//
+//	0: Clear from cursor to end of line.
+//	1: Clear from cursor to beginning of the line.
+//	2: Clear entire line.
+//
+// The cursor position is not affected.
+//
+//	CSI <n> K
+//
+// See: https://vt100.net/docs/vt510-rm/EL.html
+func EraseLine(n int) string {
+	if n < 0 {
+		n = 0
+	}
+	return "\x1b[" + strconv.Itoa(n) + "K"
+}
+
+// EraseLine constants.
+// These are the possible values for the EraseLine function.
+const (
+	EraseLineRight  = "\x1b[0K"
+	EraseLineLeft   = "\x1b[1K"
+	EraseEntireLine = "\x1b[2K"
+)
+
+// ScrollUp (SU) scrolls the screen up n lines. New lines are added at the
+// bottom of the screen.
+//
+//	CSI <n> S
+//
+// See: https://vt100.net/docs/vt510-rm/SU.html
+func ScrollUp(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "S"
+}
+
+// ScrollDown (SD) scrolls the screen down n lines. New lines are added at the
+// top of the screen.
+//
+//	CSI <n> T
+//
+// See: https://vt100.net/docs/vt510-rm/SD.html
+func ScrollDown(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "T"
+}
+
+// InsertLine (IL) inserts n blank lines at the current cursor position.
+// Existing lines are moved down.
+//
+//	CSI <n> L
+//
+// See: https://vt100.net/docs/vt510-rm/IL.html
+func InsertLine(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "L"
+}
+
+// DeleteLine (DL) deletes n lines at the current cursor position. Existing
+// lines are moved up.
+//
+//	CSI <n> M
+//
+// See: https://vt100.net/docs/vt510-rm/DL.html
+func DeleteLine(n int) string {
+	var s string
+	if n > 1 {
+		s = strconv.Itoa(n)
+	}
+	return "\x1b[" + s + "M"
+}
+
+// SetScrollingRegion (DECSTBM) sets the top and bottom margins for the scrolling
+// region. The default is the entire screen.
+//
+//	CSI <top> ; <bottom> r
+//
+// See: https://vt100.net/docs/vt510-rm/DECSTBM.html
+func SetScrollingRegion(t, b int) string {
+	if t < 0 {
+		t = 0
+	}
+	if b < 0 {
+		b = 0
+	}
+	return "\x1b[" + strconv.Itoa(t) + ";" + strconv.Itoa(b) + "r"
+}