split src/devices/input into src/devices/input/{raw,wrap}

src/device/input/wrap/refresh.go

@@ -0,0 +1,49 @@
+package wrap
+
+import (
+	"context"
+	"log"
+	"os"
+	"os/signal"
+)
+
+type Refresh struct {
+	can   context.CancelFunc
+	input Wrap
+}
+
+func NewRefreshCh(sig os.Signal) <-chan os.Signal {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, sig)
+	return c
+}
+
+func NewRefresh(newWrap func() Wrap, ch <-chan os.Signal) *Refresh {
+	ctx, can := context.WithCancel(context.Background())
+	result := &Refresh{
+		can:   can,
+		input: newWrap(),
+	}
+	go func() {
+		defer log.Println("refreshing done")
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case sig := <-ch:
+				log.Println("refreshing for", sig)
+				result.input = newWrap()
+			}
+		}
+	}()
+	return result
+}
+
+func (r *Refresh) Read() []Button {
+	return r.input.Read()
+}
+
+func (r *Refresh) Close() {
+	r.can()
+	r.input.Close()
+}