#include "xlib.h"
#include "scheme48.h"

s48_value Sym_Now;


/* Should be used with care */

s48_value Intern_Atom (s48_value Xdisplay, s48_value name){
  Atom a = XInternAtom(EXTRACT_DISPLAY(Xdisplay), s48_extract_string(name), 0);
  return ENTER_ATOM(a);
}

s48_value Find_Atom (s48_value Xdisplay, s48_value name){
  Atom a = XInternAtom (EXTRACT_DISPLAY(Xdisplay), s48_extract_string(name), 1);
  return ENTER_ATOM(a);
}

s48_value Atom_Name (s48_value Xdisplay, s48_value a) {
    register char *s;
    // not used: Disalbe_Interrupts
    s = XGetAtomName (EXTRACT_DISPLAY(Xdisplay), a);
    // not used: Enable_Interrupts
    return s48_enter_string (s);
}

s48_value List_Properties (s48_value Xwindow, x48_value Xdisplay){
    int n, i;
    Atom *ap;
    s48_value v;
    S48_DECLARE_GC_PROTECT(1);
    //not used: Disable_Interrupts
    ap = XListProperties (EXTRACT_DISPLAY(Xdisplay), 
			  EXTRACT_WINDOW(Xwindow), &n);
    //not used: Enable_Interrupts
    v = s48_make_vector (n, S48_NULL);
    S48_GC_PROTECT_1 (v);
    for (i = 0; i < n; i++) {
	S48_VECTOR_SET(v, i, s48_enter_integer((long) ap[i]))
    }
    S48_GC_UNPROTECT;
    XFree ((char *)ap);
    return v;
}


s48_value Get_Property(s48_value Xwindow, s48_value Xdisplay, s48_value Xatom_prop,
		       s48_value Xatom_type, s48_value start, s48_value len,
		       s48_value deletep) {
  Atom req_type = AnyPropertyType, actual_type_ret;
  int format_ret, i;
  unsigned long nitems_ret, bytes_left_ret;
  unsigned char* prop_ret;
  s48_value ret, x;

  S48_DECLARE_GC_PROTECT(2);

  if (!S48_EQ_P(Xatom_type, S48_FALSE)){
    req_type = s48_extract_integer(Xatom_type);
  }
  //not used: Disable_Interrupts
  XGetWindowProperty (EXTRACT_DISPLAY(Xdisplay), EXTRACT_WINDOW(Xwindow),
		      s48_extract_integer(Xatom_prop), s48_extract_integer (start),
		      s48_extract_integer (len), S48_EXTRACT_BOOLEAN(deletep), 
		      req_type, &actual_type_ret, &format_ret, &nitems_ret,
		      &bytes_left_ret, &prop_ret);

  S48_GC_PROTECT_2 (ret, v);
  ret = s48_cons(s48_enter_integer(bytes_left_ret), S48_NULL);
  if (nitems_ret){
    if (format_ret == 8){
      char d[nitems_ret+1];
      bcopy((char *)data, d, (int)nitems_ret);
      d[nitems_ret+1] = (char)0;
      ret = s48_cons (s48_enter_string(d), ret);
    }else{
      s48_value v;
      // Assumes short is 16 bits and int is 32 bits.
      v = s48_make_vector (nitems_ret, S48_NULL);
      for (i = 0; i < nitems_ret; i++){
	x = s48_enter_integer (format_ret == 16 ?
	*((short *)prop_ret + i) : *((int *)prop_ret + i));
	S48_VECTOR_SET(v, i, x;)
      }
      ret = s48_cons(v, ret);
    }
  }else{ 
    ret = (S48_NULL, ret);
  }
  ret = s48_cons(s48_enter_integer((long)format_ret), ret);
  ret = s48_cons(s48_enter_integer((long)actual_type_ret), ret);
  S48_GC_UNPROTECT;
  return ret;
}


s48_value Change_Property(s48_value Xdisplay, s48_value Xwindow,
			  s48_value Xatom_prop,  s48_value Xatom_type,
			  s48_value format, s48_value mode, 
			  s48_value data){
  int i, x, f, m, nitems;
  char* buf;
  m = Symbol_To_Bit (mode, Propmode_Syms);
  f = (int)s48_extract_integer(format);
  switch (f) {
  case 8:
    buf = s48_extract_string(data);
    nitems = strlen(buf);
    break;
  case 16: case 32:
    nitems = S48_VECTOR_LENGTH(data);
    // Alloca (buf, char*, nitems * (f / sizeof (char)));
    for (i = 0; i < nitems; i++) {
      x = (int)s48_extract_integer(s48_VECTOR_REF(data, nitems));
      if (f == 16) {
	*((short *)buf + i) = x;     /* Assumes short is 16 bits */
	}else *((int *)buf + i) = x; 
    }   /*   and int is 32 bits. */
      break;
  }
  XChangeProperty (EXTRACT_DISPLAY(Xdisplay), EXTRACT_WINDOW(Xwindow),
		   EXTRACT_ATOM(Xatom_prop), EXTRACT_ATOM(Xatom_type),
		   f, m, (unsigned char *)buf, nitems);
  return S48_UNSPECIFIC;
}


s48_value P_Delete_Property (s48_value Xdisplay, s48_value Xwindow,
			     s48_value Xatom_prop){
  XDeleteProperty (EXTRACT_DISPLAY(Xdisplay), EXTRACT_WINDOW(Xwindow),
		   EXTRACT_ATOM(Xatom_prop));
  return S48_UNSPECIFIC;
}


s48_value Rotate_Properties (s48_value Xdisplay, s48_value Xwindow,
			     s48_value Xatom_vec, s48_value delta){
  int n = S48_VECTOR_LENGTH(Xatom_vec), i;
  Atom p[n];
  for (i = 0; i < n; i++) {
	p[i] = s48_extract_integer(S48_VECTOR_REF(Xatom_vec, i));
  }
  XRotateWindowProperties(EXTRACT_DISPLAY(Xdisplay), EXTRACT_WINDOW(Xwindwo),
			  p, n,	(int)s48_extract_integer(delta));
  return S48_UNSPECIFIC;
}

s48_value Set_Selection_Owner (s48_value Xdisplay, s48_value Xatom_s,
			       s48_value Xwindow_owner, s58_value time){
  
  XSetSelectionOwner (EXTRACT_DISPLAY(Xdisplay), EXTRACT_ATOM(Xatom_s),
		      EXTRACT_WINDOW(Xwindow_owner), EXTRACT_TIME(time));
  return S48_UNSPECIFIC;
}


s48_value Get_Selection_Owner (s48_value Xdisplay, s48_value Xatom_s){
    return ENTER_WINDOW (XGetSelectionOwner (EXTRACT_DISPLAY(Xdisplay), 
					     EXTRACT_ATOM(Xatom_s)));
}


s48_value Convert_Selection (s48_value Xdisplay, s48_value Xatom_s, 
			     s48_value Xatom_t, s48_value Xatom_p,
			     s48_value Xwindow, s48_value time){
   
 XConvertSelection(EXTRACT_DISPLAY(Xdisplay), EXTRACT_ATOM(Xatom_s),
		   EXTRACT_ATOM(Xatom_t), EXTRACT_ATOM(Xatom_p),
		   EXTRACT_WINDOW(Xwindow), EXTRACT_TIME(time));
 return S48_UNSPECIFIC;
}

viod s48_init_graphics(void) {
  S48_EXPORT_FUNCTION(Intern_Atom);
  S48_EXPORT_FUNCTION(Find_Atom);
  S48_EXPORT_FUNCTION(Atom_Name);
  S48_EXPORT_FUNCTION(List_Properties);
  S48_EXPORT_FUNCTION(Get_Property);
  S48_EXPORT_FUNCTION(Change_Property);
  S48_EXPORT_FUNCTION(Delete_Property);
  S48_EXPORT_FUNCTION(Rotate_Property);
  S48_EXPORT_FUNCTION(Set_Selection_Owner);
  S48_EXPORT_FUNCTION(Get_Selection_Owner);
  S48_EXPORT_FUNCTION(Convert_Selection);
}