#include "xlib.h"
#include "scheme48.h"
#include <sys/time.h>

s48_value internal_after_function_binding = S48_FALSE;

// Open_Display(name) name should be a string or S48_FALSE (=> Null)
s48_value scx_Open_Display (s48_value name) {
  char* cname = (char*)0;
  if (!S48_FALSE_P(name))
    cname = s48_extract_string(name);

  return SCX_ENTER_DISPLAY(XOpenDisplay(cname));
}

// Close_Display( Xdisplay ) Xdisplay should be a pointer to the X-lib struct 
// cast into a Scheme-Integer.
s48_value scx_Close_Display(s48_value Xdisplay) {
  XCloseDisplay(SCX_EXTRACT_DISPLAY(Xdisplay));
  return S48_UNSPECIFIC;
}


// After-Function routines
static X_After_Function(Display* d) {
  s48_call_scheme(S48_SHARED_BINDING_REF(internal_after_function_binding),
		  1, SCX_ENTER_DISPLAY(d));
}

s48_value scx_Set_After_Function(s48_value Xdisplay, s48_value active) {
  if (S48_FALSE_P(active))
    (void)XSetAfterFunction(SCX_EXTRACT_DISPLAY(Xdisplay),
			    (int (*)())0);
  else
    (void)XSetAfterFunction(SCX_EXTRACT_DISPLAY(Xdisplay),
			    X_After_Function);
  return S48_UNSPECIFIC;
}

// This function returns the file destriptor of the message-channel.
s48_value scx_Display_Message_fd(s48_value Xdisplay) {
  int fd = ConnectionNumber(SCX_EXTRACT_DISPLAY(Xdisplay));
  /*  struct timeval timeout;
  fd_set fdset;

  FD_ZERO(&fdset);
  FD_SET(fd, &fdset);
  timeout.tv_sec = 20; // 20 seconds
  timeout.tv_usec = 0;
  
  if (select(1, &fdset, NULL, NULL, &timeout) != 0)
    return S48_TRUE;
  else
    return S48_FALSE;
  */
  return s48_enter_integer(fd);
}

// The following procedure mainly wrap a corresponding XLib macro without 
// underscores...
s48_value scx_Display_Default_Root_Window(s48_value Xdisplay) {
  Window wnd = DefaultRootWindow(SCX_EXTRACT_DISPLAY(Xdisplay));
  return SCX_ENTER_WINDOW(wnd);
}

s48_value scx_Display_Root_Window(s48_value Xdisplay, s48_value scr_num) {
  Window wnd = RootWindow(SCX_EXTRACT_DISPLAY(Xdisplay),
			  s48_extract_integer(scr_num));
  return SCX_ENTER_WINDOW(wnd);
}

s48_value scx_Display_Default_Colormap(s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  Colormap cmp = DefaultColormap(dpy, s48_extract_integer(scr));
  return SCX_ENTER_COLORMAP(cmp);
}

s48_value scx_Display_Default_Gcontext(s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  GC gc = DefaultGC(dpy, s48_extract_integer(scr));
  return SCX_ENTER_GCONTEXT(gc);
}

s48_value scx_Display_Default_Depth(s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  int depth = DefaultDepth(dpy, s48_extract_integer(scr));
  return s48_enter_fixnum(depth);
}

s48_value scx_Display_Default_Screen_Number(s48_value Xdisplay) {
  return s48_enter_fixnum(DefaultScreen(SCX_EXTRACT_DISPLAY(Xdisplay)));
}

s48_value scx_Display_Default_Visual(s48_value Xdisplay, s48_value scrnum) {
  return SCX_ENTER_VISUAL( DefaultVisual( SCX_EXTRACT_DISPLAY(Xdisplay),
					  s48_extract_integer(scrnum) ));
}

s48_value scx_Display_Cells(s48_value Xdisplay, s48_value ScrNum) {
  int num = (int)s48_extract_integer(ScrNum);
  return s48_enter_integer(DisplayCells(SCX_EXTRACT_DISPLAY(Xdisplay), num));
}

s48_value scx_Display_Planes(s48_value Xdisplay, s48_value ScrNum) {
  int num = (int)s48_extract_integer(ScrNum);
  return s48_enter_integer(DisplayPlanes(SCX_EXTRACT_DISPLAY(Xdisplay), num));
}

s48_value scx_Display_String(s48_value Xdisplay) {
  char* s = DisplayString(SCX_EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_string(s);
}

s48_value scx_Display_Vendor(s48_value Xdisplay) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  char* s = ServerVendor(dpy);
  int i = VendorRelease(dpy);
  s48_value t = S48_FALSE;
  S48_DECLARE_GC_PROTECT(1);

  S48_GC_PROTECT_1(t);
  t = s48_enter_string(s);
  t = s48_cons(t, s48_enter_integer(i));
  S48_GC_UNPROTECT();
  return t;
}

s48_value scx_Display_Protocol_Version(s48_value Xdisplay) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  int maj = ProtocolVersion(dpy);
  int min = ProtocolRevision(dpy);
  s48_value t = S48_FALSE;
  S48_DECLARE_GC_PROTECT(1);
  
  S48_GC_PROTECT_1(t);
  t = s48_enter_integer(maj);
  t = s48_cons(t, s48_enter_integer(min));
  S48_GC_UNPROTECT();

  return t;
}

s48_value scx_Display_Screen_Count(s48_value Xdisplay) {
  int cnt = ScreenCount(SCX_EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_fixnum(cnt);
}


s48_value scx_Display_Image_Byte_Order(s48_value Xdisplay) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_integer((unsigned long)ImageByteOrder(dpy));
}

s48_value scx_Display_Bitmap_Unit(s48_value Xdisplay) {
  int bu = BitmapUnit(SCX_EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(bu);
}

s48_value scx_Display_Bitmap_Bit_Order(s48_value Xdisplay) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_integer((unsigned long)BitmapBitOrder(dpy));
}

s48_value scx_Display_Bitmap_Pad(s48_value Xdisplay) {
  int bp = BitmapPad(SCX_EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(bp);
}

s48_value scx_Display_Width(s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_fixnum(DisplayWidth(dpy, s48_extract_integer(scr)));
}

s48_value scx_Display_Height(s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_fixnum(DisplayHeight(dpy, s48_extract_integer(scr)));
}

s48_value scx_Display_Width_Mm (s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_fixnum(DisplayWidthMM(dpy, s48_extract_integer(scr)));
}

s48_value scx_Display_Height_Mm (s48_value Xdisplay, s48_value scr) {
  Display* dpy = SCX_EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_fixnum(DisplayHeightMM(dpy, s48_extract_integer(scr)));
}

s48_value scx_Display_Motion_Buffer_Size(s48_value Xdisplay) {
  int mbs = XDisplayMotionBufferSize(SCX_EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(mbs);
}

s48_value scx_Display_Flush_Output (s48_value Xdisplay) {
  XFlush (SCX_EXTRACT_DISPLAY(Xdisplay));
  return S48_UNSPECIFIC;
}

s48_value scx_Display_Wait_Output (s48_value Xdisplay, s48_value discard) {
  XSync (SCX_EXTRACT_DISPLAY(Xdisplay), !S48_FALSE_P(discard));
  return S48_UNSPECIFIC;
}

s48_value scx_No_Op (s48_value Xdisplay) {
  XNoOp(SCX_EXTRACT_DISPLAY(Xdisplay));
  return S48_UNSPECIFIC;
}

s48_value scx_List_Depths (s48_value Xdisplay, s48_value scr) {
  int i, num;
  int* p;
  s48_value ret = S48_FALSE;
  S48_DECLARE_GC_PROTECT(1);

  p = XListDepths(SCX_EXTRACT_DISPLAY(Xdisplay), 
		  s48_extract_integer(scr), &num);
  if (p) {
    S48_GC_PROTECT_1(ret);
    ret = s48_make_vector(num, S48_NULL);
    for (i = 0; i < num; i++)
      S48_VECTOR_SET(ret, i, s48_enter_fixnum(p[i]));
    XFree((char *)p);
  }

  S48_GC_UNPROTECT();
  return ret;
}

s48_value scx_List_Pixmap_Formats (s48_value Xdisplay) {
  int num, i;
  XPixmapFormatValues* p;
  s48_value ret = S48_FALSE, t = S48_FALSE;
  S48_DECLARE_GC_PROTECT(2);

  p = XListPixmapFormats(SCX_EXTRACT_DISPLAY(Xdisplay), &num);
 
  if (p) {
    S48_GC_PROTECT_2(ret, t);
    ret = s48_make_vector (num, S48_FALSE);
    for (i = 0; i < num; i++) {
      t = s48_cons(s48_enter_fixnum(p[i].depth),
		   s48_cons(s48_enter_fixnum(p[i].bits_per_pixel),
			    s48_cons(s48_enter_fixnum(p[i].scanline_pad), 
				     S48_NULL)));
      S48_VECTOR_SET(ret, i, t);
    }
    XFree ((char *)p);
  }

  S48_GC_UNPROTECT();
  return ret;
}

s48_value scx_Display_Select_Input(s48_value Xdisplay, s48_value Xwindow, 
				   s48_value event_mask) {
  XSelectInput(SCX_EXTRACT_DISPLAY(Xdisplay),
	       SCX_EXTRACT_WINDOW(Xwindow),
	       s48_extract_integer(event_mask));
  return S48_UNSPECIFIC;
}

void scx_init_display(void) {
  S48_GC_PROTECT_GLOBAL(internal_after_function_binding);
  internal_after_function_binding = 
    s48_get_imported_binding("internal-after-function");

  S48_EXPORT_FUNCTION(scx_Set_After_Function);
  S48_EXPORT_FUNCTION(scx_Open_Display);
  S48_EXPORT_FUNCTION(scx_Close_Display);
  S48_EXPORT_FUNCTION(scx_Display_Message_fd);
  S48_EXPORT_FUNCTION(scx_Display_Default_Root_Window);
  S48_EXPORT_FUNCTION(scx_Display_Root_Window);
  S48_EXPORT_FUNCTION(scx_Display_Default_Colormap);
  S48_EXPORT_FUNCTION(scx_Display_Default_Gcontext);
  S48_EXPORT_FUNCTION(scx_Display_Default_Depth);
  S48_EXPORT_FUNCTION(scx_Display_Default_Screen_Number);
  S48_EXPORT_FUNCTION(scx_Display_Default_Visual);
  S48_EXPORT_FUNCTION(scx_Display_Cells);
  S48_EXPORT_FUNCTION(scx_Display_Planes);
  S48_EXPORT_FUNCTION(scx_Display_String);
  S48_EXPORT_FUNCTION(scx_Display_Vendor);
  S48_EXPORT_FUNCTION(scx_Display_Protocol_Version);
  S48_EXPORT_FUNCTION(scx_Display_Screen_Count);
  S48_EXPORT_FUNCTION(scx_Display_Image_Byte_Order);
  S48_EXPORT_FUNCTION(scx_Display_Bitmap_Unit);
  S48_EXPORT_FUNCTION(scx_Display_Bitmap_Bit_Order);
  S48_EXPORT_FUNCTION(scx_Display_Bitmap_Pad);
  S48_EXPORT_FUNCTION(scx_Display_Width);
  S48_EXPORT_FUNCTION(scx_Display_Height);
  S48_EXPORT_FUNCTION(scx_Display_Width_Mm);
  S48_EXPORT_FUNCTION(scx_Display_Height_Mm);
  S48_EXPORT_FUNCTION(scx_Display_Motion_Buffer_Size);
  S48_EXPORT_FUNCTION(scx_Display_Flush_Output);
  S48_EXPORT_FUNCTION(scx_Display_Wait_Output);
  S48_EXPORT_FUNCTION(scx_No_Op);
  S48_EXPORT_FUNCTION(scx_List_Depths);
  S48_EXPORT_FUNCTION(scx_List_Pixmap_Formats);
  S48_EXPORT_FUNCTION(scx_Display_Select_Input);
}