non-main thread call fixed

config.json

@@ -4,5 +4,6 @@
   "sizeX": 100,
   "sizeY": 47,
   "fpsLimit" : 60,
-  "font": "./resources/fonts-ttf/LiberationMono-Bold.ttf"
+  "font": "./resources/fonts-ttf/LiberationMono-Bold.ttf",
+  "verbosity": "debug"
 }

main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"github.com/jcerise/gogue/screens"
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
 	"lab.zaar.be/thefish/alchemyst-go/ui"
@@ -9,33 +8,78 @@ import (
 	"lab.zaar.be/thefish/alchemyst-go/util"
 	blt "lab.zaar.be/thefish/bearlibterminal"
 	"os"
+	"runtime"
 	"time"
 )
 
+// Рецепт чтобы убежать от [fatal] 'refresh' was not called from the main thread
+// https://github.com/golang/go/wiki/LockOSThread
+func init() {
+	runtime.LockOSThread()
+}
+
+type GameState struct {
+	mainfunc chan func()
+	exit     chan struct{}
+	input    chan string
+}
+
+var State = GameState{
+	mainfunc: make(chan func()),
+	exit:     make(chan struct{}, 1),
+	input:    make(chan string, 1),
+}
+
 func main() {
 
 	config := util.LoadConfig()
+	var logLevels = map[string]zerolog.Level{"debug": zerolog.DebugLevel, "info": zerolog.InfoLevel, "warn": zerolog.WarnLevel}
+	var logger = log.Output(zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC3339}).Level(logLevels[config.Verbosity])
 
-	//var logLevels = map[string]zerolog.Level{"debug": zerolog.DebugLevel, "info": zerolog.InfoLevel, "warn": zerolog.WarnLevel}
-	//var logger = log.Output(zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC3339}).Level(logLevels[opts.Verbosity])
-	var logger = log.Output(zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC3339})
 
 	mainCtx := util.NewClientContext(config, &logger)
 
 	mw := mainwindow.Init(mainCtx)
 	defer mw.Close()
 
+	//we can run logic in separate goroutines
+	go mainLoop(mainCtx)
 
-	mainLoop(mainCtx)
+	//but every call to bearlibterminal must be wrapped to closure and passed to mainfunc
+	var exit = false
+	for !exit {
+		select {
+		case f := <-State.mainfunc:
+			f()
+		case <-State.exit:
+			mainCtx.Logger().Warn().Msg("quitting NOW")
+			exit = true
+			break
+		}
+
+	}
+	mainCtx.Logger().Info().Msg("pre-shutdown sequence")
+
+}
+
+// do runs f on the main thread.
+func (*GameState) Do(f func()) {
+	done := make(chan struct{}, 1)
+	State.mainfunc <- func() {
+		f()
+		done <- struct{}{}
+	}
+	<-done
 }
 
 func mainLoop(ctx util.ClientCtx) {
 
-	var exit = false
-
 	baseLayer := mainwindow.AddLayer(0, "white")
 	bgLayer := mainwindow.AddLayer(1, "white")
 	menuLayer := mainwindow.AddLayer(2, "white")
+
+	initRender := func() {
+
 		baseLayer.WithColor("white").NewRect(3, 0, 17, 6).Fill()
 		baseLayer.WithColor("grey").NewRect(22, 0, 38, 6).Splash()
 		baseLayer.WithColor("blue").NewRect(3, 8, 57, 6).Fill()
@@ -61,20 +105,21 @@ Cursus in hac habitasse platea. Aliquet risus feugiat in ante metus dictum. Maec
 Sed euismod nisi porta lorem mollis aliquam ut porttitor leo. Ut tellus elementum sagittis vitae et leo duis ut diam. Elementum curabitur vitae nunc sed velit dignissim. Auctor elit sed vulputate mi sit. Consectetur adipiscing elit ut aliquam purus. Feugiat vivamus at augue eget arcu. Duis ut diam quam nulla porttitor massa id neque. Pharetra magna ac placerat vestibulum lectus mauris ultrices. Non sodales neque sodales ut etiam. Massa ultricies mi quis hendrerit dolor. Est sit amet facilisis magna etiam. Ornare suspendisse sed nisi lacus sed viverra tellus in.
 `)
 
-
-
 		baseLayer.Print(1, 1, "Hello, [font=bold]world[/font]!")
 		baseLayer.Print(1, 4, "Testing line-[color=orange]spacing[/color]")
 		blt.Refresh()
+	}
 
-	mgr := screens.NewScreenManager()
-
-	_ = mgr
-
-	for !exit {
+	State.Do(initRender)
+	for {
+		//fresh inputs to chan
+		State.Do(func() {
 				var key, keycode = ui.ReadKey(ctx)
-		if key != "" {
-			blt.ClearArea(0, 3, 80, 1)
+				if keycode == blt.TK_CLOSE {
+					ctx.Logger().Warn().Msg("exiting on window close...")
+					State.exit <- struct{}{}
+					ctx.Logger().Warn().Msg("...done")
+					return
 				}
 				switch key {
 				case "F10":
@@ -84,19 +129,29 @@ Sed euismod nisi porta lorem mollis aliquam ut porttitor leo. Ut tellus elementu
 				case "Ctrl+q":
 					fallthrough
 				case "Escape":
-			exit = true
+					ctx.Logger().Info().Msg("exiting on quit command...")
+					State.exit <- struct{}{}
+					ctx.Logger().Info().Msg("...done")
+					return
 				default:
 					//blt.Print(1, 3, "Key: "+key)
-			menuLayer.Print(1, 3, "Key: "+key)
-			baseLayer.Print(1,5, key)
+					State.input <- key
 					//baseLayer.Print(1, 4, "█")
 				}
-
-		if keycode == blt.TK_CLOSE {
-			exit = true
+		})
+		//read inputs, write to screen
+		State.Do(func() {
+			key := <-State.input
+			if key != "" {
+				blt.ClearArea(0, 3, 80, 1)
+				menuLayer.Print(1, 3, "Key: "+key)
+				baseLayer.Print(1, 5, key)
 			}
-
+		})
+		//update screen
+		State.Do(func(){
 			blt.Refresh()
+		})
 	}
-
+	ctx.Logger().Warn().Msg("and it continues")
 }

util/config.go

@@ -14,6 +14,7 @@ type Config struct {
 	MainWindowSizeX int    `json:"sizeX"`
 	MainWindowSizeY int    `json:"sizeY"`
 	Font string `json:"font"`
+	Verbosity string `json:"verbosity"`
 }
 
 func LoadConfig() *Config {