func initBufferAndView(v *view.View, args commandLineArgs) func() {
var b buf.Buf
b.Init()
v.Init(&b)
if len(args.initialFiles) > 0 {
if err := AppendFile(&b, args.initialFiles[0]); err != nil {
log.Fatal(err)
}
}
return func() {}
}
func main() {
args := parseCommandLine()
cleanup := initTermbox()
defer cleanup()
nextEvent, cleanup := initEventSource(args)
defer cleanup()
var v view.View
cleanup = initBufferAndView(&v, args)
defer cleanup()
// not that interested in startup and tear down cost
// so let's start profiling only now
cleanup = initProfiling(args)
defer cleanup()
mainloop:
for {
v.Display()
switch ev := nextEvent(); ev.Type {
case termbox.EventKey:
switch ev.Key {
case termbox.KeyEsc:
break mainloop
case termbox.KeyPgdn:
v.PageDown()
case termbox.KeyPgup:
v.PageUp()
default:
switch ev.Ch {
case 'l':
v.MoveCursor(motion.RuneForward)
case 'h':
v.MoveCursor(motion.RuneBackward)
case 'j':
v.MoveCursor(motion.LineForward)
case 'k':
v.MoveCursor(motion.LineBackward)
}
}
case termbox.EventError:
panic(ev.Err)
}
}
}