mirror of https://github.com/restic/restic.git
34 lines
751 B
Go
34 lines
751 B
Go
package termstatus
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import (
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"fmt"
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"io"
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"os"
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)
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const (
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posixMoveCursorHome = "\r"
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posixMoveCursorUp = "\x1b[1A"
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posixClearLine = "\x1b[2K"
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)
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// posixClearLines will clear the current line and the n lines above.
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// Afterwards the cursor is positioned at the start of the first cleared line.
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func posixClearLines(wr io.Writer, fd uintptr, n int) {
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// clear current line
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_, err := wr.Write([]byte(posixMoveCursorHome + posixClearLine))
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if err != nil {
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fmt.Fprintf(os.Stderr, "write failed: %v\n", err)
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return
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}
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for ; n > 0; n-- {
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// clear current line and move on line up
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_, err := wr.Write([]byte(posixMoveCursorUp + posixClearLine))
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if err != nil {
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fmt.Fprintf(os.Stderr, "write failed: %v\n", err)
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return
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}
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}
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}
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