package progress import ( "fmt" "strings" "github.com/lucasb-eyer/go-colorful" "github.com/muesli/reflow/ansi" "github.com/muesli/termenv" ) var color func(string) termenv.Color = termenv.ColorProfile().Color type Model struct { // Left side color of progress bar. By default, it's #00dbde StartColor colorful.Color // Left side color of progress bar. By default, it's #fc00ff EndColor colorful.Color // Width of progress bar in symbols. Width int // filament rune of done part of progress bar. it's █ by default Full rune // empty rune of pending part of progress bar. it's ░ by default Empty rune // if true, gradient will be setted from start to end of filled part. Instead, it'll work // on all proggress bar length FullGradientMode bool ShowPercent bool PercentFormat string } // NewModel returns a model with default values. func NewModel() Model { startColor, _ := colorful.Hex("#00dbde") endColor, _ := colorful.Hex("#fc00ff") return Model{ StartColor: startColor, EndColor: endColor, Width: 40, Full: '█', Empty: '░', ShowPercent: true, PercentFormat: " %3.0f%%", } } func (m Model) View(percent float64) string { if m.ShowPercent { s := fmt.Sprintf(m.PercentFormat, percent*100) w := ansi.PrintableRuneWidth(s) return m.bar(percent, w) + s } return m.bar(percent, 0) } func (m Model) bar(percent float64, textWidth int) string { w := m.Width - textWidth ramp := make([]string, int(float64(w)*percent)) for i := 0; i < len(ramp); i++ { gradientPart := float64(w) if m.FullGradientMode { gradientPart = float64(len(ramp)) } percent := float64(i) / gradientPart c := m.StartColor.BlendLuv(m.EndColor, percent) ramp[i] = c.Hex() } var fullCells string for i := 0; i < len(ramp); i++ { fullCells += termenv.String(string(m.Full)).Foreground(color(ramp[i])).String() } fullCells += strings.Repeat(string(m.Empty), w-len(ramp)) return fullCells }