neofeels/app/menu.go

package app

import (
	"os"
	"os/exec"

	"git.sr.ht/~rockorager/vaxis"
	"git.sr.ht/~rockorager/vaxis/widgets/list"
	"git.sr.ht/~rockorager/vaxis/widgets/term"
	"git.tilde.town/nbsp/neofeels/ui"
)

type MainMenu struct {
	title string
	list  list.List
	help  string
}

func NewMainMenu() *MainMenu {
	return &MainMenu{
		`   ___        __  
  / _/__ ___ / /__
 / _/ -_) -_) (_-<
/_/ \__/\__/_/___/
    neofeels 0.1.0`,
		list.New([]string{
			"  record some feels         ",
			"  manage your feels         ",
			"  check out your neighbors  ",
			"  browse global feels       ",
			"  visit your subscriptions  ",
			"  scribble some graffiti    ",
			"  change your settings      ",
			"  send some feedback        ",
			"  see credits               ",
			"  read documentation        ",
		}),
		"↑↓/kj move  ↵ enter  q exit",
	}
}

func (menu *MainMenu) Event(state *ui.State, event vaxis.Event) (processed bool) {
	if key, ok := event.(vaxis.Key); ok && key.EventType == vaxis.EventPress {
		switch key.String() {
		case "Ctrl+c", "Ctrl+d", "q":
			close(ui.Quit)
		case "Down", "j":
			menu.list.Down()
		case "Up", "k":
			menu.list.Up()
		case "End":
			menu.list.End()
		case "Home":
			menu.list.Home()
		case "Enter":
			switch menu.list.Index() {
			case 8:
				ui.ViewChange <- NewCredits()
			case 9:
				showManpage(state)
			}
		}
		processed = true
	}
	win := state.Window()
	win.New(win.Width/2-10, win.Height/2-8, 20, 5).Print(vaxis.Segment{Text: menu.title})
	menu.list.Draw(vaxis.Window{
		Vx:     win.Vx,
		Parent: nil,
		Column: win.Width/2 - 14,
		Row:    win.Height/2 - 2,
		Width:  28,
		Height: 10,
	})
	win.New(win.Width/2-14, win.Height/2+9, 28, 1).Print(vaxis.Segment{Text: menu.help})
	return
}

func showManpage(state *ui.State) {
	vt := term.New()
	vt.TERM = os.Getenv("TERM")
	vt.Attach(state.PostEvent())
	vt.Focus()
	err := vt.Start(exec.Command("man", "neofeels"))
	if err != nil {
		panic(err)
	}
	defer vt.Close()

	for ev := range state.Events() {
		switch ev.(type) {
		case term.EventClosed:
			state.Window().Clear()
			return
		case vaxis.Redraw:
			vt.Draw(state.Window())
			state.Render()
			continue
		}

		// for some reason vaxis doubles all events for Press/Release so this just ignores releases
		if key, ok := ev.(vaxis.Key); ok && key.EventType == vaxis.EventPress {
			vt.Update(ev)
		}
	}
}