forked from Mirrors/bubbletea
286 lines
6.5 KiB
Go
286 lines
6.5 KiB
Go
package main
|
||
|
||
// An example demonstrating an application with multiple views.
|
||
|
||
import (
|
||
"fmt"
|
||
"math"
|
||
"strconv"
|
||
"strings"
|
||
"time"
|
||
|
||
tea "github.com/charmbracelet/bubbletea"
|
||
"github.com/fogleman/ease"
|
||
"github.com/lucasb-eyer/go-colorful"
|
||
"github.com/muesli/reflow/indent"
|
||
"github.com/muesli/termenv"
|
||
)
|
||
|
||
const (
|
||
progressBarWidth = 71
|
||
progressFullChar = "█"
|
||
progressEmptyChar = "░"
|
||
)
|
||
|
||
// General stuff for styling the view
|
||
var (
|
||
term = termenv.ColorProfile()
|
||
keyword = makeFgStyle("211")
|
||
subtle = makeFgStyle("241")
|
||
progressEmpty = subtle(progressEmptyChar)
|
||
dot = colorFg(" • ", "236")
|
||
|
||
// Gradient colors we'll use for the progress bar
|
||
ramp = makeRamp("#B14FFF", "#00FFA3", progressBarWidth)
|
||
)
|
||
|
||
func main() {
|
||
initialModel := model{0, false, 10, 0, 0, false, false}
|
||
p := tea.NewProgram(initialModel)
|
||
if err := p.Start(); err != nil {
|
||
fmt.Println("could not start program:", err)
|
||
}
|
||
}
|
||
|
||
type tickMsg struct{}
|
||
type frameMsg struct{}
|
||
|
||
func tick() tea.Cmd {
|
||
return tea.Tick(time.Second, func(time.Time) tea.Msg {
|
||
return tickMsg{}
|
||
})
|
||
}
|
||
|
||
func frame() tea.Cmd {
|
||
return tea.Tick(time.Second/60, func(time.Time) tea.Msg {
|
||
return frameMsg{}
|
||
})
|
||
}
|
||
|
||
type model struct {
|
||
Choice int
|
||
Chosen bool
|
||
Ticks int
|
||
Frames int
|
||
Progress float64
|
||
Loaded bool
|
||
Quitting bool
|
||
}
|
||
|
||
func (m model) Init() tea.Cmd {
|
||
return tick()
|
||
}
|
||
|
||
// Main update function.
|
||
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
|
||
// Make sure these keys always quit
|
||
if msg, ok := msg.(tea.KeyMsg); ok {
|
||
k := msg.String()
|
||
if k == "q" || k == "esc" || k == "ctrl+c" {
|
||
m.Quitting = true
|
||
return m, tea.Quit
|
||
}
|
||
}
|
||
|
||
// Hand off the message and model to the approprate update function for the
|
||
// appropriate view based on the current state.
|
||
if !m.Chosen {
|
||
return updateChoices(msg, m)
|
||
}
|
||
return updateChosen(msg, m)
|
||
}
|
||
|
||
// The main view, which just calls the approprate sub-view
|
||
func (m model) View() string {
|
||
var s string
|
||
if m.Quitting {
|
||
return "\n See you later!\n\n"
|
||
}
|
||
if !m.Chosen {
|
||
s = choicesView(m)
|
||
} else {
|
||
s = chosenView(m)
|
||
}
|
||
return indent.String("\n"+s+"\n\n", 2)
|
||
}
|
||
|
||
// Sub-update functions
|
||
|
||
// Update loop for the first view where you're choosing a task.
|
||
func updateChoices(msg tea.Msg, m model) (tea.Model, tea.Cmd) {
|
||
switch msg := msg.(type) {
|
||
|
||
case tea.KeyMsg:
|
||
switch msg.String() {
|
||
case "j", "down":
|
||
m.Choice += 1
|
||
if m.Choice > 3 {
|
||
m.Choice = 3
|
||
}
|
||
case "k", "up":
|
||
m.Choice -= 1
|
||
if m.Choice < 0 {
|
||
m.Choice = 0
|
||
}
|
||
case "enter":
|
||
m.Chosen = true
|
||
return m, frame()
|
||
}
|
||
|
||
case tickMsg:
|
||
if m.Ticks == 0 {
|
||
m.Quitting = true
|
||
return m, tea.Quit
|
||
}
|
||
m.Ticks -= 1
|
||
return m, tick()
|
||
}
|
||
|
||
return m, nil
|
||
}
|
||
|
||
// Update loop for the second view after a choice has been made
|
||
func updateChosen(msg tea.Msg, m model) (tea.Model, tea.Cmd) {
|
||
switch msg.(type) {
|
||
|
||
case frameMsg:
|
||
if !m.Loaded {
|
||
m.Frames += 1
|
||
m.Progress = ease.OutBounce(float64(m.Frames) / float64(100))
|
||
if m.Progress >= 1 {
|
||
m.Progress = 1
|
||
m.Loaded = true
|
||
m.Ticks = 3
|
||
return m, tick()
|
||
}
|
||
return m, frame()
|
||
}
|
||
|
||
case tickMsg:
|
||
if m.Loaded {
|
||
if m.Ticks == 0 {
|
||
m.Quitting = true
|
||
return m, tea.Quit
|
||
}
|
||
m.Ticks -= 1
|
||
return m, tick()
|
||
}
|
||
}
|
||
|
||
return m, nil
|
||
}
|
||
|
||
// Sub-views
|
||
|
||
// The first view, where you're choosing a task
|
||
func choicesView(m model) string {
|
||
c := m.Choice
|
||
|
||
tpl := "What to do today?\n\n"
|
||
tpl += "%s\n\n"
|
||
tpl += "Program quits in %s seconds\n\n"
|
||
tpl += subtle("j/k, up/down: select") + dot + subtle("enter: choose") + dot + subtle("q, esc: quit")
|
||
|
||
choices := fmt.Sprintf(
|
||
"%s\n%s\n%s\n%s",
|
||
checkbox("Plant carrots", c == 0),
|
||
checkbox("Go to the market", c == 1),
|
||
checkbox("Read something", c == 2),
|
||
checkbox("See friends", c == 3),
|
||
)
|
||
|
||
return fmt.Sprintf(tpl, choices, colorFg(strconv.Itoa(m.Ticks), "79"))
|
||
}
|
||
|
||
// The second view, after a task has been chosen
|
||
func chosenView(m model) string {
|
||
var msg string
|
||
|
||
switch m.Choice {
|
||
case 0:
|
||
msg = fmt.Sprintf("Carrot planting?\n\nCool, we'll need %s and %s...", keyword("libgarden"), keyword("vegeutils"))
|
||
case 1:
|
||
msg = fmt.Sprintf("A trip to the market?\n\nOkay, then we should install %s and %s...", keyword("marketkit"), keyword("libshopping"))
|
||
case 2:
|
||
msg = fmt.Sprintf("Reading time?\n\nOkay, cool, then we’ll need a library. Yes, an %s.", keyword("actual library"))
|
||
default:
|
||
msg = fmt.Sprintf("It’s always good to see friends.\n\nFetching %s and %s...", keyword("social-skills"), keyword("conversationutils"))
|
||
}
|
||
|
||
label := "Downloading..."
|
||
if m.Loaded {
|
||
label = fmt.Sprintf("Downloaded. Exiting in %s seconds...", colorFg(strconv.Itoa(m.Ticks), "79"))
|
||
}
|
||
|
||
return msg + "\n\n" + label + "\n" + progressbar(80, m.Progress) + "%"
|
||
}
|
||
|
||
func checkbox(label string, checked bool) string {
|
||
if checked {
|
||
return colorFg("[x] "+label, "212")
|
||
}
|
||
return fmt.Sprintf("[ ] %s", label)
|
||
}
|
||
|
||
func progressbar(width int, percent float64) string {
|
||
w := float64(progressBarWidth)
|
||
|
||
fullSize := int(math.Round(w * percent))
|
||
var fullCells string
|
||
for i := 0; i < fullSize; i++ {
|
||
fullCells += termenv.String(progressFullChar).Foreground(term.Color(ramp[i])).String()
|
||
}
|
||
|
||
emptySize := int(w) - fullSize
|
||
emptyCells := strings.Repeat(progressEmpty, emptySize)
|
||
|
||
return fmt.Sprintf("%s%s %3.0f", fullCells, emptyCells, math.Round(percent*100))
|
||
}
|
||
|
||
// Utils
|
||
|
||
// Color a string's foreground with the given value.
|
||
func colorFg(val, color string) string {
|
||
return termenv.String(val).Foreground(term.Color(color)).String()
|
||
}
|
||
|
||
// Return a function that will colorize the foreground of a given string.
|
||
func makeFgStyle(color string) func(string) string {
|
||
return termenv.Style{}.Foreground(term.Color(color)).Styled
|
||
}
|
||
|
||
// Color a string's foreground and background with the given value.
|
||
func makeFgBgStyle(fg, bg string) func(string) string {
|
||
return termenv.Style{}.
|
||
Foreground(term.Color(fg)).
|
||
Background(term.Color(bg)).
|
||
Styled
|
||
}
|
||
|
||
// Generate a blend of colors.
|
||
func makeRamp(colorA, colorB string, steps float64) (s []string) {
|
||
cA, _ := colorful.Hex(colorA)
|
||
cB, _ := colorful.Hex(colorB)
|
||
|
||
for i := 0.0; i < steps; i++ {
|
||
c := cA.BlendLuv(cB, i/steps)
|
||
s = append(s, colorToHex(c))
|
||
}
|
||
return
|
||
}
|
||
|
||
// Convert a colorful.Color to a hexidecimal format compatible with termenv.
|
||
func colorToHex(c colorful.Color) string {
|
||
return fmt.Sprintf("#%s%s%s", colorFloatToHex(c.R), colorFloatToHex(c.G), colorFloatToHex(c.B))
|
||
}
|
||
|
||
// Helper function for converting colors to hex. Assumes a value between 0 and
|
||
// 1.
|
||
func colorFloatToHex(f float64) (s string) {
|
||
s = strconv.FormatInt(int64(f*255), 16)
|
||
if len(s) == 1 {
|
||
s = "0" + s
|
||
}
|
||
return
|
||
}
|