Add default mainLoop with syscall

mainloop.go

@@ -0,0 +1,37 @@
+// +build !windows
+
+package main
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/nsf/termbox-go"
+)
+
+func mainLoop(memBolt *BoltDB, style Style) {
+	screens := defaultScreensForData(memBolt)
+	displayScreen := screens[BrowserScreenIndex]
+	layoutAndDrawScreen(displayScreen, style)
+	for {
+		event := termbox.PollEvent()
+		if event.Type == termbox.EventKey {
+			if event.Key == termbox.KeyCtrlZ {
+				process, _ := os.FindProcess(os.Getpid())
+				termbox.Close()
+				process.Signal(syscall.SIGSTOP)
+				termbox.Init()
+			}
+			newScreenIndex := displayScreen.handleKeyEvent(event)
+			if newScreenIndex < len(screens) {
+				displayScreen = screens[newScreenIndex]
+				layoutAndDrawScreen(displayScreen, style)
+			} else {
+				break
+			}
+		}
+		if event.Type == termbox.EventResize {
+			layoutAndDrawScreen(displayScreen, style)
+		}
+	}
+}