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package text
import "strings"
// ANSICodesSupported will be true on consoles where ANSI Escape Codes/Sequences
// are supported.
var ANSICodesSupported = areANSICodesSupported()
// Escape encodes the string with the ANSI Escape Sequence.
// For ex.:
//
// Escape("Ghost", "") == "Ghost"
// Escape("Ghost", "\x1b[91m") == "\x1b[91mGhost\x1b[0m"
// Escape("\x1b[94mGhost\x1b[0mLady", "\x1b[91m") == "\x1b[94mGhost\x1b[0m\x1b[91mLady\x1b[0m"
// Escape("Nymeria\x1b[94mGhost\x1b[0mLady", "\x1b[91m") == "\x1b[91mNymeria\x1b[94mGhost\x1b[0m\x1b[91mLady\x1b[0m"
// Escape("Nymeria \x1b[94mGhost\x1b[0m Lady", "\x1b[91m") == "\x1b[91mNymeria \x1b[94mGhost\x1b[0m\x1b[91m Lady\x1b[0m"
func Escape(str string, escapeSeq string) string {
out := ""
if !strings.HasPrefix(str, EscapeStart) {
out += escapeSeq
}
out += strings.Replace(str, EscapeReset, EscapeReset+escapeSeq, -1)
if !strings.HasSuffix(out, EscapeReset) {
out += EscapeReset
}
if strings.Contains(out, escapeSeq+EscapeReset) {
out = strings.Replace(out, escapeSeq+EscapeReset, "", -1)
}
return out
}
// StripEscape strips all ANSI Escape Sequence from the string.
// For ex.:
//
// StripEscape("Ghost") == "Ghost"
// StripEscape("\x1b[91mGhost\x1b[0m") == "Ghost"
// StripEscape("\x1b[94mGhost\x1b[0m\x1b[91mLady\x1b[0m") == "GhostLady"
// StripEscape("\x1b[91mNymeria\x1b[94mGhost\x1b[0m\x1b[91mLady\x1b[0m") == "NymeriaGhostLady"
// StripEscape("\x1b[91mNymeria \x1b[94mGhost\x1b[0m\x1b[91m Lady\x1b[0m") == "Nymeria Ghost Lady"
func StripEscape(str string) string {
var out strings.Builder
out.Grow(RuneWidthWithoutEscSequences(str))
isEscSeq := false
for _, sChr := range str {
if sChr == EscapeStartRune {
isEscSeq = true
}
if !isEscSeq {
out.WriteRune(sChr)
}
if isEscSeq && sChr == EscapeStopRune {
isEscSeq = false
}
}
return out.String()
}
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