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

s48_value Sym_Now;

Generic_Predicate (Atom)

Generic_Simple_Equal (Atom, ATOM, atom)

Generic_Print (Atom, "#[atom %lu]", ATOM(x)->atom)

/*
s48_value Make_Atom (a) Atom a; {
    s48_value atom;

    if (a == None)
	return Sym_None;
    atom = Find_Object (T_Atom, (GENERIC)0, Match_X_Obj, a);
    if (S48_NULL_P (atom)) {
	atom = Alloc_Object (sizeof (struct S_Atom), T_Atom, 0);
	ATOM(atom)->tag = S48_NULL;
	ATOM(atom)->atom = a;
	Register_Object (atom, (GENERIC)0, (PFO)0, 0);
    }
    return atom;
}
 */


/* 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 s48_enter_integer((long)a);
}

s48_value Find_Atom (s48_value Xdisplay, s48_value name){
  Atom a = XInternAtom (EXTRACT_DISPLAY(Xdisplay), s48_extract_string(name), 1);
  if (a == None){
    return s48_value s48_enter_symbol(none);
  }else{
    return 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),
		   s48_extract_integer(Xatom_prop),
		   s48_extract_integer(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),
		     s48_extract_integer(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), s48_extract_integer(Xatom_s),
		      EXTRACT_WINDOW(Xwindow_owner), EXTRACT_TIME(time));
  return S48_UNSPECIFIC;
}

/*

static s48_value P_Selection_Owner (d, s) s48_value d, s; {
    Check_Type (d, T_Display);
    Check_Type (s, T_Atom);
    return Make_Window (0, DISPLAY(d)->dpy,
	XGetSelectionOwner (DISPLAY(d)->dpy, ATOM(s)->atom));
}
 */

s48_value Selection_Owner (s48_value Xdisplay, s48_value Xatom_s){
    return ENTER_WINDOW (XGetSelectionOwner (EXTRACT_DISPLAY(Xdisplay), 
					     s48_extract_integer(Xatom_s)));
}

/*
static s48_value P_Convert_Selection (s, target, prop, w, time)
	s48_value s, target, prop, w, time; {
    Atom p = None;

    Check_Type (s, T_Atom);
    Check_Type (target, T_Atom);
    if (!S48_EQ_P(prop, Sym_None)) {
	Check_Type (prop, T_Atom);
	p = ATOM(prop)->atom;
    }
    Check_Type (w, T_Window);
    XConvertSelection (WINDOW(w)->dpy, ATOM(s)->atom, ATOM(target)->atom,
	p, WINDOW(w)->win, Get_Time (time));
    return Void;
}
 */


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){
    Atom p = None;

    if (!S48_EQ_P(prop, Sym_None)) {
	Check_Type (prop, T_Atom);
	p = ATOM(prop)->atom;
    }
 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;
}

elk_init_xlib_property () {
    Define_Symbol (&Sym_Now, "now");
    Generic_Define (Atom, "atom", "atom?");
    Define_Primitive (P_Make_Atom,         "make-atom",          1, 1, EVAL);
    Define_Primitive (P_Intern_Atom,       "intern-atom",        2, 2, EVAL);
    Define_Primitive (P_Find_Atom,         "find-atom",          2, 2, EVAL);
    Define_Primitive (P_Atom_Name,         "atom-name",          2, 2, EVAL);
    Define_Primitive (P_List_Properties,   "list-properties",    1, 1, EVAL);
    Define_Primitive (P_Get_Property,      "get-property",       6, 6, EVAL);
    Define_Primitive (P_Change_Property,   "change-property",    6, 6, EVAL);
    Define_Primitive (P_Delete_Property,   "delete-property",    2, 2, EVAL);
    Define_Primitive (P_Rotate_Properties, "rotate-properties",  3, 3, EVAL);
    Define_Primitive (P_Set_Selection_Owner, "set-selection-owner!",
								 4, 4, EVAL);
    Define_Primitive (P_Selection_Owner,   "selection-owner",    2, 2, EVAL);
    Define_Primitive (P_Convert_Selection, "convert-selection",  5, 5, EVAL);
}