bubbles/progress/progress.go
2020-12-01 17:03:48 -05:00

92 lines
2.1 KiB
Go

package progress
import (
"strings"
tea "github.com/charmbracelet/bubbletea"
"github.com/lucasb-eyer/go-colorful"
"github.com/muesli/termenv"
)
// Value is explicit type of, you know, progression. Can be 0.0 < x < 1.0.
type Value float64
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
// Which part of bar need to visualise. Can be 0.0 < Progress < 1.0, if value is bigger or smaller, it'll
// be mapped to this values
Progress float64
// filament rune of done part of progress bar. it's █ by default
FilamentSymbol rune
// empty rune of pending part of progress bar. it's ░ by default
EmptySymbol 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
}
// NewModel returns a model with default values.
func NewModel(size int) *Model {
startColor, _ := colorful.Hex("#00dbde")
endColor, _ := colorful.Hex("#fc00ff")
return &Model{
StartColor: startColor,
EndColor: endColor,
Width: size,
FilamentSymbol: '█',
EmptySymbol: '░',
}
}
func (m *Model) Init() tea.Cmd {
return nil
}
func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch cmd := msg.(type) {
case Value:
if cmd > 1 {
cmd = 1
}
if cmd < 0 {
cmd = 0
}
m.Progress = float64(cmd)
}
return m, nil
}
func (m *Model) View() string {
ramp := make([]string, int(float64(m.Width)*m.Progress))
for i := 0; i < len(ramp); i++ {
gradientPart := float64(m.Width)
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.FilamentSymbol)).Foreground(termenv.ColorProfile().Color(ramp[i])).String()
}
fullCells += strings.Repeat(string(m.EmptySymbol), m.Width-len(ramp))
return fullCells
}