aerc/lib/ui/ui.go

93 lines
1.6 KiB
Go
Raw Normal View History

2018-01-11 04:03:56 +01:00
package ui
import (
"github.com/gdamore/tcell"
2018-01-11 04:03:56 +01:00
"git.sr.ht/~sircmpwn/aerc2/config"
)
type UI struct {
Exit bool
2018-02-28 03:17:26 +01:00
Content DrawableInteractive
ctx *Context
screen tcell.Screen
2018-01-11 04:41:15 +01:00
tcEvents chan tcell.Event
invalidations chan interface{}
}
2018-02-28 03:17:26 +01:00
func Initialize(conf *config.AercConfig,
content DrawableInteractive) (*UI, error) {
screen, err := tcell.NewScreen()
if err != nil {
2018-01-11 04:03:56 +01:00
return nil, err
}
if err = screen.Init(); err != nil {
return nil, err
}
screen.Clear()
screen.HideCursor()
width, height := screen.Size()
state := UI{
Content: content,
ctx: NewContext(width, height, screen),
screen: screen,
tcEvents: make(chan tcell.Event, 10),
invalidations: make(chan interface{}),
}
2018-01-11 04:41:15 +01:00
go (func() {
for !state.Exit {
state.tcEvents <- screen.PollEvent()
2018-01-11 04:41:15 +01:00
}
})()
2018-06-12 01:52:21 +02:00
go (func() {
state.invalidations <- nil
})()
content.OnInvalidate(func(_ Drawable) {
2018-06-12 01:52:21 +02:00
go (func() {
state.invalidations <- nil
})()
})
2018-01-11 04:03:56 +01:00
return &state, nil
}
func (state *UI) Close() {
state.screen.Fini()
2018-01-11 04:03:56 +01:00
}
func (state *UI) Tick() bool {
2018-01-11 04:41:15 +01:00
select {
case event := <-state.tcEvents:
switch event := event.(type) {
case *tcell.EventResize:
state.screen.Clear()
width, height := event.Size()
state.ctx = NewContext(width, height, state.screen)
state.Content.Invalidate()
2018-01-11 04:41:15 +01:00
}
2018-02-28 03:17:26 +01:00
state.Content.Event(event)
case <-state.invalidations:
for {
// Flush any other pending invalidations
select {
case <-state.invalidations:
break
default:
goto done
}
}
done:
state.Content.Draw(state.ctx)
state.screen.Show()
default:
return false
2018-01-11 04:03:56 +01:00
}
return true
}