switch to tcell from termbox

This is a simple mostly straight forward switch to tcell in favor of
termbox.
It uses the tcell native api (not the compat layer) but does not make
use of most features.

Further changes should include moving to tcell's views.TextArea and the
general built in widget behaviour instead of the current ad hoc
implementation.

Regression: Cursor isn't shown in ex-line

1 files changed, 30 insertions, 18 deletions

diff --git a/lib/ui/ui.go b/lib/ui/ui.go
index e9b4e9b5..d3eacf29 100644
--- a/lib/ui/ui.go
+++ b/lib/ui/ui.go
@@ -1,7 +1,7 @@
 package ui
 
 import (
-	tb "github.com/nsf/termbox-go"
+	"github.com/gdamore/tcell"
 
 	"git.sr.ht/~sircmpwn/aerc2/config"
 )
@@ -10,30 +10,41 @@ type UI struct {
 	Exit    bool
 	Content DrawableInteractive
 	ctx     *Context
+	screen  tcell.Screen
 
-	tbEvents      chan tb.Event
+	tcEvents      chan tcell.Event
 	invalidations chan interface{}
 }
 
 func Initialize(conf *config.AercConfig,
 	content DrawableInteractive) (*UI, error) {
 
-	if err := tb.Init(); err != nil {
+	screen, err := tcell.NewScreen()
+	if err != nil {
 		return nil, err
 	}
-	width, height := tb.Size()
+
+	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),
+		ctx:     NewContext(width, height, screen),
+		screen:  screen,
 
-		tbEvents:      make(chan tb.Event, 10),
+		tcEvents:      make(chan tcell.Event, 10),
 		invalidations: make(chan interface{}),
 	}
-	tb.SetInputMode(tb.InputEsc | tb.InputMouse)
-	tb.SetOutputMode(tb.Output256)
+	//tb.SetOutputMode(tb.Output256)
 	go (func() {
 		for !state.Exit {
-			state.tbEvents <- tb.PollEvent()
+			state.tcEvents <- screen.PollEvent()
 		}
 	})()
 	go (func() { state.invalidations <- nil })()
@@ -44,27 +55,28 @@ func Initialize(conf *config.AercConfig,
 }
 
 func (state *UI) Close() {
-	tb.Close()
+	state.screen.Fini()
 }
 
 func (state *UI) Tick() bool {
 	select {
-	case event := <-state.tbEvents:
-		switch event.Type {
-		case tb.EventKey:
+	case event := <-state.tcEvents:
+		switch event := event.(type) {
+		case *tcell.EventKey:
 			// TODO: temporary
-			if event.Key == tb.KeyEsc {
+			if event.Key() == tcell.KeyEsc {
 				state.Exit = true
 			}
-		case tb.EventResize:
-			tb.Clear(tb.ColorDefault, tb.ColorDefault)
-			state.ctx = NewContext(event.Width, event.Height)
+		case *tcell.EventResize:
+			state.screen.Clear()
+			width, height := event.Size()
+			state.ctx = NewContext(width, height, state.screen)
 			state.Content.Invalidate()
 		}
 		state.Content.Event(event)
 	case <-state.invalidations:
 		state.Content.Draw(state.ctx)
-		tb.Flush()
+		state.screen.Show()
 	default:
 		return false
 	}