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47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
// +build !windows
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package termstatus
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import (
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"io"
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"os"
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"golang.org/x/sys/unix"
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isatty "github.com/mattn/go-isatty"
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)
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// clearCurrentLine removes all characters from the current line and resets the
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// cursor position to the first column.
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func clearCurrentLine(wr io.Writer, fd uintptr) func(io.Writer, uintptr) {
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return posixClearCurrentLine
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}
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// moveCursorUp moves the cursor to the line n lines above the current one.
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func moveCursorUp(wr io.Writer, fd uintptr) func(io.Writer, uintptr, int) {
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return posixMoveCursorUp
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}
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// canUpdateStatus returns true if status lines can be printed, the process
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// output is not redirected to a file or pipe.
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func canUpdateStatus(fd uintptr) bool {
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if !isatty.IsTerminal(fd) {
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return false
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}
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term := os.Getenv("TERM")
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if term == "" {
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return false
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}
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// TODO actually read termcap db and detect if terminal supports what we need
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return term != "dumb"
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}
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// getTermSize returns the dimensions of the given terminal.
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// the code is taken from "golang.org/x/crypto/ssh/terminal"
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func getTermSize(fd uintptr) (width, height int, err error) {
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ws, err := unix.IoctlGetWinsize(int(fd), unix.TIOCGWINSZ)
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if err != nil {
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return -1, -1, err
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}
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return int(ws.Col), int(ws.Row), nil
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}
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