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Diffstat (limited to 'vendor/github.com/manifoldco/promptui/codes.go')
-rw-r--r-- | vendor/github.com/manifoldco/promptui/codes.go | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/vendor/github.com/manifoldco/promptui/codes.go b/vendor/github.com/manifoldco/promptui/codes.go new file mode 100644 index 000000000..8138c40d6 --- /dev/null +++ b/vendor/github.com/manifoldco/promptui/codes.go @@ -0,0 +1,120 @@ +package promptui + +import ( + "fmt" + "strconv" + "strings" + "text/template" +) + +const esc = "\033[" + +type attribute int + +// The possible state of text inside the application, either Bold, faint, italic or underline. +// +// These constants are called through the use of the Styler function. +const ( + reset attribute = iota + + FGBold + FGFaint + FGItalic + FGUnderline +) + +// The possible colors of text inside the application. +// +// These constants are called through the use of the Styler function. +const ( + FGBlack attribute = iota + 30 + FGRed + FGGreen + FGYellow + FGBlue + FGMagenta + FGCyan + FGWhite +) + +// The possible background colors of text inside the application. +// +// These constants are called through the use of the Styler function. +const ( + BGBlack attribute = iota + 40 + BGRed + BGGreen + BGYellow + BGBlue + BGMagenta + BGCyan + BGWhite +) + +// ResetCode is the character code used to reset the terminal formatting +var ResetCode = fmt.Sprintf("%s%dm", esc, reset) + +const ( + hideCursor = esc + "?25l" + showCursor = esc + "?25h" + clearLine = esc + "2K" +) + +// FuncMap defines template helpers for the output. It can be extended as a regular map. +// +// The functions inside the map link the state, color and background colors strings detected in templates to a Styler +// function that applies the given style using the corresponding constant. +var FuncMap = template.FuncMap{ + "black": Styler(FGBlack), + "red": Styler(FGRed), + "green": Styler(FGGreen), + "yellow": Styler(FGYellow), + "blue": Styler(FGBlue), + "magenta": Styler(FGMagenta), + "cyan": Styler(FGCyan), + "white": Styler(FGWhite), + "bgBlack": Styler(BGBlack), + "bgRed": Styler(BGRed), + "bgGreen": Styler(BGGreen), + "bgYellow": Styler(BGYellow), + "bgBlue": Styler(BGBlue), + "bgMagenta": Styler(BGMagenta), + "bgCyan": Styler(BGCyan), + "bgWhite": Styler(BGWhite), + "bold": Styler(FGBold), + "faint": Styler(FGFaint), + "italic": Styler(FGItalic), + "underline": Styler(FGUnderline), +} + +func upLine(n uint) string { + return movementCode(n, 'A') +} + +func movementCode(n uint, code rune) string { + return esc + strconv.FormatUint(uint64(n), 10) + string(code) +} + +// Styler is a function that accepts multiple possible styling transforms from the state, +// color and background colors constants and transforms them into a templated string +// to apply those styles in the CLI. +// +// The returned styling function accepts a string that will be extended with +// the wrapping function's styling attributes. +func Styler(attrs ...attribute) func(interface{}) string { + attrstrs := make([]string, len(attrs)) + for i, v := range attrs { + attrstrs[i] = strconv.Itoa(int(v)) + } + + seq := strings.Join(attrstrs, ";") + + return func(v interface{}) string { + end := "" + s, ok := v.(string) + if !ok || !strings.HasSuffix(s, ResetCode) { + end = ResetCode + } + return fmt.Sprintf("%s%sm%v%s", esc, seq, v, end) + } +} |