func main() {
// Handle options
help := flag.Bool("help", false, "Show usage")
verbose := flag.Bool("verbose", false, "Verbose output")
fullscreen := flag.Bool("fullscreen", false, "Go fullscreen!")
bgImage := flag.String("bg-image", "", "Background image file")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "shell - A system shell based on CLIngon (Command Line INterface for Go Nerds\n\n")
fmt.Fprintf(os.Stderr, "Usage:\n\n")
fmt.Fprintf(os.Stderr, "\tshell [options] <fontfile> \n\n")
fmt.Fprintf(os.Stderr, "Options are:\n\n")
flag.PrintDefaults()
}
flag.Parse()
if *help == true {
flag.Usage()
return
}
if len(flag.Args()) < 1 {
flag.Usage()
return
}
config := configuration{
verbose: *verbose,
fullscreen: *fullscreen,
bgImage: *bgImage,
consoleX: 40,
consoleY: 40,
consoleW: 560,
consoleH: 400,
animationLength: ANIMATION_LENGTH,
}
r := initialize(&config)
y_channel := make(chan int16)
running := true
// Have to start this *before* printing to the console,
// because the printing will cause some messages to be sent to 'sdlrenderer.UpdatedRectsCh()'
go func() {
var y int16 = config.consoleY
for running {
select {
case newY := <-y_channel:
y = newY
r.render(nil, y)
case rects := <-sdlrenderer.UpdatedRectsCh():
r.render(rects, y)
}
}
}()
var console *clingon.Console = clingon.NewConsole(&ShellEvaluator{})
console.SetRenderer(r.sdlRenderer)
y_channel <- config.consoleY
console.Print(greetingText)
console.SetPrompt("shell:$ ")
var anim *clingon.Animation = nil
var animValueCh <-chan float64 = nil
toggleAnimation := false
for running {
select {
case event := <-sdl.Events:
switch e := event.(type) {
case sdl.QuitEvent:
running = false
case sdl.MouseMotionEvent:
var y int
state := sdl.GetRelativeMouseState(nil, &y)
if state == 1 {
if y < 0 {
sdlrenderer.EventCh() <- clingon.Cmd_Scroll{clingon.SCROLL_UP}
} else if y > 0 {
sdlrenderer.EventCh() <- clingon.Cmd_Scroll{clingon.SCROLL_DOWN}
}
}
case sdl.KeyboardEvent:
keyName := sdl.GetKeyName(sdl.Key(e.Keysym.Sym))
if config.verbose {
fmt.Printf("\n")
fmt.Printf("%v: %v", e.Keysym.Sym, ": ", keyName)
fmt.Printf("%04x ", e.Type)
for i := 0; i < len(e.Pad0); i++ {
fmt.Printf("%02x ", e.Pad0[i])
}
fmt.Printf("\n")
fmt.Printf("Type: %02x Which: %02x State: %02x Pad: %02x\n", e.Type, e.Which, e.State, e.Pad0[0])
fmt.Printf("Scancode: %02x Sym: %08x Mod: %04x Unicode: %04x\n", e.Keysym.Scancode, e.Keysym.Sym, e.Keysym.Mod, e.Keysym.Unicode)
}
if (keyName == "escape") && (e.Type == sdl.KEYDOWN) {
running = false
} else if (keyName == "f10") && (e.Type == sdl.KEYDOWN) {
if anim != nil {
anim.Terminate()
<-anim.FinishedCh()
anim = nil
}
toggleAnimation = !toggleAnimation
slidingDistance := int16(r.appSurface.H) - config.consoleY
anim = clingon.NewSliderAnimation(config.animationLength, float64(slidingDistance))
animValueCh = anim.ValueCh()
anim.Start()
} else if (keyName == "page up") && (e.Type == sdl.KEYDOWN) {
sdlrenderer.EventCh() <- clingon.Cmd_Scroll{clingon.SCROLL_UP}
} else if (keyName == "page down") && (e.Type == sdl.KEYDOWN) {
sdlrenderer.EventCh() <- clingon.Cmd_Scroll{clingon.SCROLL_DOWN}
} else if (keyName == "up") && (e.Type == sdl.KEYDOWN) {
console.PutReadline(clingon.HISTORY_PREV)
} else if (keyName == "down") && (e.Type == sdl.KEYDOWN) {
console.PutReadline(clingon.HISTORY_NEXT)
} else if (keyName == "left") && (e.Type == sdl.KEYDOWN) {
console.PutReadline(clingon.CURSOR_LEFT)
} else if (keyName == "right") && (e.Type == sdl.KEYDOWN) {
console.PutReadline(clingon.CURSOR_RIGHT)
} else {
unicode := e.Keysym.Unicode
if unicode > 0 {
console.PutUnicode(unicode)
}
}
}
case value := <-animValueCh:
var y float64
if toggleAnimation {
y = 40 + value
} else {
y = float64(r.appSurface.H) - value
}
y_channel <- int16(y)
}
} // End of "for running"
sdl.Quit()
}
func (eval *ShellEvaluator) Run(console *clingon.Console, command string) error {
var buf bytes.Buffer
cmd := exec.Command(os.Getenv("SHELL"), "-c", command)
cmd.Stdout = &buf
cmd.Stderr = &buf
err := cmd.Run()
console.Print(buf.String())
return err
}
func (e *Echoer) Run(console *clingon.Console, command string) error {
console.Print(command)
return nil
}