package ui import ( tb "github.com/nsf/termbox-go" "git.sr.ht/~sircmpwn/aerc2/config" ) type UI struct { Exit bool Content Drawable ctx *Context tbEvents chan tb.Event invalidations chan interface{} } func Initialize(conf *config.AercConfig, content Drawable) (*UI, error) { if err := tb.Init(); err != nil { return nil, err } width, height := tb.Size() state := UI{ Content: content, ctx: NewContext(width, height), tbEvents: make(chan tb.Event, 10), invalidations: make(chan interface{}), } tb.SetInputMode(tb.InputEsc | tb.InputMouse) tb.SetOutputMode(tb.Output256) go (func() { for !state.Exit { state.tbEvents <- tb.PollEvent() } })() go (func() { state.invalidations <- nil })() content.OnInvalidate(func(_ Drawable) { go (func() { state.invalidations <- nil })() }) return &state, nil } func (state *UI) Close() { tb.Close() } func (state *UI) Tick() bool { select { case event := <-state.tbEvents: switch event.Type { case tb.EventKey: if event.Key == tb.KeyEsc { state.Exit = true } case tb.EventResize: tb.Clear(tb.ColorDefault, tb.ColorDefault) state.ctx = NewContext(event.Width, event.Height) state.Content.Invalidate() } case <-state.invalidations: state.Content.Draw(state.ctx) tb.Flush() default: return false } return true }