Basic BubbleTea lipgloss-styled application

main.go

package main

import (
	"fmt"
	"os"

	"github.com/charmbracelet/bubbles/help"
	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/textinput"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
)

var (
	textInputStyle = lipgloss.NewStyle().BorderStyle(lipgloss.RoundedBorder())
)

type keyBindings struct {
	Quit key.Binding
}

// ShortHelp returns keybindings to be shown in the mini help view. It's part
// of the key.Map interface.
func (k keyBindings) ShortHelp() []key.Binding {
	return []key.Binding{k.Quit}
}

// FullHelp returns keybindings for the expanded help view. It's part of the
// key.Map interface.
func (k keyBindings) FullHelp() [][]key.Binding {
	return [][]key.Binding{
		{k.Quit},
	}
}

func newBindings() keyBindings {
	return keyBindings{
		Quit: key.NewBinding(key.WithKeys("ctrl+c"), key.WithHelp("ctrl+c", "Quit app")),
	}
}

type model struct {
	input textinput.Model
	help  help.Model
	b     keyBindings
	wSize tea.WindowSizeMsg
}

func initialModel() model {
	ti := textinput.New()
	ti.Focus()

	return model{
		input: ti,
		help:  help.New(),
		b:     newBindings(),
	}
}

func (m model) Init() tea.Cmd {
	return textinput.Blink
}

func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd

	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		m.wSize = msg
	case tea.KeyMsg:
		switch {

		case key.Matches(msg, m.b.Quit):
			return m, tea.Quit
		}
	}

	m.input, cmd = m.input.Update(msg)

	return m, cmd

}

func (m model) View() string {
	textInputStyle = textInputStyle.Width(m.wSize.Width - textInputStyle.GetHorizontalFrameSize() - len(m.input.Prompt))

	return fmt.Sprintf("%s\n%s", textInputStyle.Render(m.input.View()), m.help.View(m.b))
}

func main() {
	if _, err := tea.NewProgram(initialModel(), tea.WithAltScreen()).Run(); err != nil {
		fmt.Println("Error running program:", err)
		os.Exit(1)
	}

}