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package main
import (
"fmt"
"os"
"github.com/charmbracelet/bubbles/help"
"github.com/charmbracelet/bubbles/key"
"github.com/charmbracelet/bubbles/textarea"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
const (
initialInputs = 2
maxInputs = 6
minInputs = 1
helpHeight = 5
)
var (
cursorStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("212"))
cursorLineStyle = lipgloss.NewStyle().
Background(lipgloss.Color("57")).
Foreground(lipgloss.Color("230"))
placeholderStyle = lipgloss.NewStyle().
Foreground(lipgloss.Color("238"))
endOfBufferStyle = lipgloss.NewStyle().
Foreground(lipgloss.Color("235"))
focusedPlaceholderStyle = lipgloss.NewStyle().
Foreground(lipgloss.Color("99"))
focusedBorderStyle = lipgloss.NewStyle().
Border(lipgloss.RoundedBorder()).
BorderForeground(lipgloss.Color("238"))
blurredBorderStyle = lipgloss.NewStyle().
Border(lipgloss.HiddenBorder())
)
type keymap = struct {
next, prev, add, remove, quit key.Binding
}
func newTextarea() textarea.Model {
t := textarea.New()
t.Prompt = ""
t.Placeholder = "Type something"
t.ShowLineNumbers = true
t.Cursor.Style = cursorStyle
t.FocusedStyle.Placeholder = focusedPlaceholderStyle
t.BlurredStyle.Placeholder = placeholderStyle
t.FocusedStyle.CursorLine = cursorLineStyle
t.FocusedStyle.Base = focusedBorderStyle
t.BlurredStyle.Base = blurredBorderStyle
t.FocusedStyle.EndOfBuffer = endOfBufferStyle
t.BlurredStyle.EndOfBuffer = endOfBufferStyle
t.KeyMap.DeleteWordBackward.SetEnabled(false)
t.KeyMap.LineNext = key.NewBinding(key.WithKeys("down"))
t.KeyMap.LinePrevious = key.NewBinding(key.WithKeys("up"))
t.Blur()
return t
}
type model struct {
width int
height int
keymap keymap
help help.Model
inputs []textarea.Model
focus int
}
func newModel() model {
m := model{
inputs: make([]textarea.Model, initialInputs),
help: help.New(),
keymap: keymap{
next: key.NewBinding(
key.WithKeys("tab"),
key.WithHelp("tab", "next"),
),
prev: key.NewBinding(
key.WithKeys("shift+tab"),
key.WithHelp("shift+tab", "prev"),
),
add: key.NewBinding(
key.WithKeys("ctrl+n"),
key.WithHelp("ctrl+n", "add an editor"),
),
remove: key.NewBinding(
key.WithKeys("ctrl+w"),
key.WithHelp("ctrl+w", "remove an editor"),
),
quit: key.NewBinding(
key.WithKeys("esc", "ctrl+c"),
key.WithHelp("esc", "quit"),
),
},
}
for i := 0; i < initialInputs; i++ {
m.inputs[i] = newTextarea()
}
m.inputs[m.focus].Focus()
m.updateKeybindings()
return m
}
func (m model) Init() tea.Cmd {
return textarea.Blink
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var cmds []tea.Cmd
switch msg := msg.(type) {
case tea.KeyMsg:
switch {
case key.Matches(msg, m.keymap.quit):
for i := range m.inputs {
m.inputs[i].Blur()
}
return m, tea.Quit
case key.Matches(msg, m.keymap.next):
m.inputs[m.focus].Blur()
m.focus++
if m.focus > len(m.inputs)-1 {
m.focus = 0
}
cmd := m.inputs[m.focus].Focus()
cmds = append(cmds, cmd)
case key.Matches(msg, m.keymap.prev):
m.inputs[m.focus].Blur()
m.focus--
if m.focus < 0 {
m.focus = len(m.inputs) - 1
}
cmd := m.inputs[m.focus].Focus()
cmds = append(cmds, cmd)
case key.Matches(msg, m.keymap.add):
m.inputs = append(m.inputs, newTextarea())
case key.Matches(msg, m.keymap.remove):
m.inputs = m.inputs[:len(m.inputs)-1]
if m.focus > len(m.inputs)-1 {
m.focus = len(m.inputs) - 1
}
}
case tea.WindowSizeMsg:
m.height = msg.Height
m.width = msg.Width
}
m.updateKeybindings()
m.sizeInputs()
// Update all textareas
for i := range m.inputs {
newModel, cmd := m.inputs[i].Update(msg)
m.inputs[i] = newModel
cmds = append(cmds, cmd)
}
return m, tea.Batch(cmds...)
}
func (m *model) sizeInputs() {
for i := range m.inputs {
m.inputs[i].SetWidth(m.width / len(m.inputs))
m.inputs[i].SetHeight(m.height - helpHeight)
}
}
func (m *model) updateKeybindings() {
m.keymap.add.SetEnabled(len(m.inputs) < maxInputs)
m.keymap.remove.SetEnabled(len(m.inputs) > minInputs)
}
func (m model) View() string {
help := m.help.ShortHelpView([]key.Binding{
m.keymap.next,
m.keymap.prev,
m.keymap.add,
m.keymap.remove,
m.keymap.quit,
})
var views []string
for i := range m.inputs {
views = append(views, m.inputs[i].View())
}
return lipgloss.JoinHorizontal(lipgloss.Top, views...) + "\n\n" + help
}
func main() {
if _, err := tea.NewProgram(newModel(), tea.WithAltScreen()).Run(); err != nil {
fmt.Println("Error while running program:", err)
os.Exit(1)
}
}
|
