#include "xlib.h"

unsigned long Attribs_To_XSetWindowAttributes(s48_value attribs, 
					      XSetWindowAttributes* Xattrs) {
  int i; unsigned long mask = 0;
  for (i=0; i<15; i++) {
    s48_value value = S48_VECTOR_REF(attribs, i);
    if (S48_FALSE != value) {
      switch (i) {
       case 0: Xattrs->background_pixmap = 
          S48_SYMBOL_P(value) ? ParentRelative : SCX_EXTRACT_PIXMAP(value);
	mask |= CWBackPixmap;
	break;
      case 1: Xattrs->background_pixel = s48_extract_integer(value); 
	mask |= CWBackPixel;
	break;
      case 2: Xattrs->border_pixmap = 
          S48_SYMBOL_P(value) ? CopyFromParent : s48_extract_integer(value);
	mask |= CWBorderPixmap;
	break;
      case 3: Xattrs->border_pixel = s48_extract_integer(value); 
	mask |= CWBitGravity;
	break;
      case 4: Xattrs->bit_gravity = Symbol_To_Bit(value, Bit_Grav_Syms); 
	mask |= CWBitGravity;
	break;
      case 5: Xattrs->win_gravity = Symbol_To_Bit(value, Grav_Syms); 
	mask |= CWWinGravity;
	break;
      case 6: Xattrs->backing_store = Symbol_To_Bit(value, Backing_Store_Syms);
	mask |= CWBackingStore;
	break;
      case 7: Xattrs->backing_planes = s48_extract_integer(value); 
	mask |= CWBackingPlanes;
	break;
      case 8: Xattrs->backing_pixel = s48_extract_integer(value); 
	mask |= CWBackingPixel;
	break;
      case 9: Xattrs->override_redirect = s48_extract_integer(value); 
	mask |= CWOverrideRedirect;
	break;
      case 10: Xattrs->save_under = s48_extract_integer(value); 
	mask |= CWSaveUnder;
	break;
      case 11: Xattrs->event_mask = Symbols_To_Bits(value, Event_Mask_Syms); 
	mask |= CWEventMask;
	break;
      case 12: Xattrs->do_not_propagate_mask = 
		 Symbols_To_Bits(value, Event_Mask_Syms); 
	mask |= CWDontPropagate;
	break;
      case 13: Xattrs->colormap = s48_extract_integer(value); 
	mask |= CWColormap;
	break;
      case 14: Xattrs->cursor = s48_extract_integer(value); 
	mask |= CWCursor;
	break;
      }
    }
  }
  return mask;
}

s48_value scx_Create_Window (s48_value Xdisplay, s48_value Xparent, 
			     s48_value x, s48_value y, 
			     s48_value width, s48_value height, 
			     s48_value border_width, s48_value depth, 
			     s48_value class, s48_value Xvisual, 
			     s48_value attribs) {
  Window win;
  XSetWindowAttributes Xattrs;
  unsigned long mask = Attribs_To_XSetWindowAttributes( attribs, &Xattrs );
  int dep = S48_FALSE_P(depth) ? CopyFromParent : s48_extract_integer(depth);
  int cla = 0;
  Visual* vis = S48_FALSE_P(Xvisual) ? CopyFromParent : 
    SCX_EXTRACT_VISUAL(Xvisual);

  switch (s48_extract_integer(class)) {
    case 0: cla = InputOutput;
    case 1: cla = InputOnly;
    case 2: cla = CopyFromParent;
  }
  
  win = XCreateWindow( SCX_EXTRACT_DISPLAY(Xdisplay), 
		       SCX_EXTRACT_WINDOW(Xparent), 
		       (int)s48_extract_integer(x),
		       (int)s48_extract_integer(y),
		       (int)s48_extract_integer (width),
		       (int)s48_extract_integer (height), 
		       (int)s48_extract_integer (border_width),
		       dep, cla, vis,
		       mask,&Xattrs );
  return SCX_ENTER_WINDOW(win);
}

s48_value scx_Destroy_Window (s48_value Xdisplay, s48_value Xwindow) {
  XDestroyWindow (SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow));
  return S48_UNSPECIFIC;
}

s48_value scx_Change_Window_Attributes(s48_value Xwindow, s48_value Xdisplay,
  s48_value attribs) {

  XSetWindowAttributes Xattrs;
  unsigned long mask = Attribs_To_XSetWindowAttributes( attribs, &Xattrs );

  XChangeWindowAttributes(SCX_EXTRACT_DISPLAY(Xdisplay), 
    SCX_EXTRACT_WINDOW(Xwindow), 
    mask, &Xattrs);

  return S48_UNSPECIFIC;
}


s48_value scx_Get_Window_Attributes(s48_value Xdisplay, s48_value Xwindow) {
  XWindowAttributes WA;

  S48_DECLARE_GC_PROTECT(1);

  s48_value res = S48_NULL;

  if (!XGetWindowAttributes(SCX_EXTRACT_DISPLAY(Xdisplay),SCX_EXTRACT_WINDOW(Xwindow),
			    &WA))
    res = S48_FALSE;
  else {
    S48_GC_PROTECT_1(res);
  
    res = s48_make_vector(23, S48_FALSE);

    S48_VECTOR_SET(res, 0, s48_enter_integer(WA.x));
    S48_VECTOR_SET(res, 1, s48_enter_integer(WA.y));
    S48_VECTOR_SET(res, 2, s48_enter_integer(WA.width));
    S48_VECTOR_SET(res, 3, s48_enter_integer(WA.height));
    S48_VECTOR_SET(res, 4, s48_enter_integer(WA.border_width));
    S48_VECTOR_SET(res, 5, s48_enter_integer(WA.depth));
    S48_VECTOR_SET(res, 6, SCX_ENTER_VISUAL(WA.visual));
    S48_VECTOR_SET(res, 7, SCX_ENTER_WINDOW(WA.root));
    S48_VECTOR_SET(res, 8, Bit_To_Symbol(WA.class, Class_Syms));
    S48_VECTOR_SET(res, 9, Bit_To_Symbol(WA.bit_gravity, Bit_Grav_Syms));
    S48_VECTOR_SET(res, 10, Bit_To_Symbol(WA.win_gravity, Grav_Syms));
    S48_VECTOR_SET(res, 11, Bit_To_Symbol(WA.backing_store, 
					  Backing_Store_Syms));
    S48_VECTOR_SET(res, 12, s48_enter_integer(WA.backing_planes));
    S48_VECTOR_SET(res, 13, SCX_ENTER_PIXEL(WA.backing_pixel));
    S48_VECTOR_SET(res, 14, WA.save_under ? S48_TRUE : S48_FALSE );
    S48_VECTOR_SET(res, 15, SCX_ENTER_COLORMAP( WA.colormap ));
    S48_VECTOR_SET(res, 16, WA.map_installed ? S48_TRUE : S48_FALSE);
    S48_VECTOR_SET(res, 17, Bit_To_Symbol( WA.map_state, Map_State_Syms));
    S48_VECTOR_SET(res, 18, Bits_To_Symbols( WA.all_event_masks, 
					     Event_Mask_Syms ));
    S48_VECTOR_SET(res, 19, Bits_To_Symbols( WA.your_event_mask, 
					     Event_Mask_Syms ));
    S48_VECTOR_SET(res, 20, Bits_To_Symbols( WA.do_not_propagate_mask, 
					     Event_Mask_Syms ));
    S48_VECTOR_SET(res, 21, WA.override_redirect ? S48_TRUE : S48_FALSE);
    
    S48_VECTOR_SET(res, 22, S48_FALSE);
    //S48_VECTOR_SET(res, 22, s48_enter_integer((long)WA.screen));
    // WA.screen not yet supported
  }

  S48_GC_UNPROTECT();
  return res;
}

s48_value Changes_To_XWindowChanges(s48_value changes, XWindowChanges* WC) {
  int i; unsigned long mask = 0;
  for (i=0; i<7; i++) {
    s48_value value = S48_VECTOR_REF(changes, i);
    if (S48_FALSE != value) {
      switch (i) {
      case 0: WC->x = s48_extract_integer(value);
	mask |= CWX;
	break;
      case 2: WC->y = s48_extract_integer(value);
	mask |= CWY;
	break;
      case 3: WC->width = s48_extract_integer(value);
	mask |= CWWidth;
	break;
      case 4: WC->height = s48_extract_integer(value);
	mask |= CWHeight;
	break;
      case 5: WC->sibling = SCX_EXTRACT_WINDOW(value);
	mask |= CWSibling;
	break;
      case 6: WC->stack_mode = Symbol_To_Bit(value, Stack_Mode_Syms);
	mask |= CWStackMode;
	break;
      }
    }
  }
  return mask;
}

s48_value scx_Configure_Window (s48_value Xwindow, s48_value Xdisplay, 
				s48_value changes) {
  XWindowChanges WC;
  unsigned long mask = Changes_To_XWindowChanges(changes, &WC);

  XConfigureWindow (SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow),
		    mask, &WC);
  return S48_UNSPECIFIC;
}

s48_value scx_Map_Window(s48_value Xwindow, s48_value Xdisplay) {
  XMapWindow(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow));
  return S48_UNSPECIFIC;
}
  
s48_value scx_Unmap_Window(s48_value Xwindow, s48_value Xdisplay) {
  XUnmapWindow(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow));
  return S48_UNSPECIFIC;
}

s48_value scx_Destroy_Subwindows (s48_value Xwindow, s48_value Xdisplay) {
  XDestroySubwindows(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow));
  return S48_UNSPECIFIC;
}

s48_value scx_Map_Subwindows (s48_value Xwindow, s48_value Xdisplay) {
  XMapSubwindows(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow));
  return S48_UNSPECIFIC;
}

s48_value scx_Unmap_Subwindows (s48_value Xwindow, s48_value Xdisplay) {
  XUnmapSubwindows(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow));
  return S48_UNSPECIFIC;
}

s48_value scx_Circulate_Subwindows(s48_value Xwindow, s48_value Xdisplay,
			       s48_value dir) {
  XCirculateSubwindows(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow), 
		       S48_FALSE_P(dir) ? RaiseLowest : LowerHighest);
  return S48_UNSPECIFIC;
}

s48_value scx_Query_Tree (s48_value Xwindow, s48_value Xdisplay) {
  Window root, parent, *children;
  int i;
  unsigned n;

  s48_value v = S48_FALSE, ret = S48_FALSE;
  S48_DECLARE_GC_PROTECT(2);
  
  XQueryTree (SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow), 
	      &root, &parent, &children, &n);

  ret = s48_make_vector(3, S48_FALSE);
  v = S48_FALSE;

  S48_GC_PROTECT_2 (v, ret);
  
  // vector of child-windows
  v = s48_make_vector (n, S48_FALSE);
  for (i = 0; i < n; i++) {
    S48_VECTOR_SET(v, i, SCX_ENTER_WINDOW(children[i]));
  }

  S48_VECTOR_SET(ret, 0, SCX_ENTER_WINDOW(root));
  S48_VECTOR_SET(ret, 1, SCX_ENTER_WINDOW(parent));
  S48_VECTOR_SET(ret, 2, v);

  S48_GC_UNPROTECT();
  return ret;
}

s48_value scx_Translate_Coordinates (s48_value Xdisplay, s48_value srcXwindow, 
				 s48_value x, s48_value y, 
				 s48_value dstXwindow) {
  int rx, ry;
  Window child;
  s48_value v = S48_FALSE;

  S48_DECLARE_GC_PROTECT(1);

  if (!XTranslateCoordinates (SCX_EXTRACT_DISPLAY(Xdisplay), 
			      SCX_EXTRACT_WINDOW(srcXwindow), 
			      SCX_EXTRACT_WINDOW(dstXwindow),
			      (int)s48_extract_integer (x), 
			      (int)s48_extract_integer (y), 
			      &rx, &ry, &child))
    return S48_FALSE;

  S48_GC_PROTECT_1 (v);

  v = s48_make_vector(3, S48_FALSE);
  S48_VECTOR_SET(v, 0, s48_enter_integer(rx));
  S48_VECTOR_SET(v, 1, s48_enter_integer(ry));
  S48_VECTOR_SET(v, 2, SCX_ENTER_WINDOW(child));

  S48_GC_UNPROTECT();
  return v;
}

s48_value scx_Query_Pointer (s48_value Xdisplay, s48_value Xwindow) {

  s48_value v = S48_FALSE;
  Bool ret;
  Window root, child;
  int r_x, r_y, x, y;
  unsigned int mask;
  S48_DECLARE_GC_PROTECT(1);
  
  ret = XQueryPointer (SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_WINDOW(Xwindow), 
		       &root, &child, &r_x, &r_y, &x, &y, &mask);

  v = s48_make_vector(8, S48_FALSE);
  S48_GC_PROTECT_1(v);

  S48_VECTOR_SET(v, 0, s48_enter_integer(x));
  S48_VECTOR_SET(v, 1, s48_enter_integer(y));
  S48_VECTOR_SET(v, 2, ret ? S48_TRUE : S48_FALSE);
  S48_VECTOR_SET(v, 3, SCX_ENTER_WINDOW(root));
  S48_VECTOR_SET(v, 4, s48_enter_integer(r_x));
  S48_VECTOR_SET(v, 5, s48_enter_integer(r_y));
  S48_VECTOR_SET(v, 6, SCX_ENTER_WINDOW(child));
  S48_VECTOR_SET(v, 7, Bits_To_Symbols ((unsigned long)mask, State_Syms));

  S48_GC_UNPROTECT();
  return v;
}

s48_value scx_Get_Geometry(s48_value Xdisplay, s48_value Xdrawable) {
  s48_value v = S48_FALSE;
  Window root;
  unsigned int x,y,width,height,border_width,depth;
  S48_DECLARE_GC_PROTECT(1);

  XGetGeometry(SCX_EXTRACT_DISPLAY(Xdisplay), SCX_EXTRACT_DRAWABLE(Xdrawable),
	       &root, &x, &y, &width, &height, &border_width, &depth);

  v = s48_make_vector(7, S48_FALSE);
  S48_GC_PROTECT_1(v);
  S48_VECTOR_SET(v, 0, SCX_ENTER_WINDOW(root));
  S48_VECTOR_SET(v, 1, s48_enter_integer(x));
  S48_VECTOR_SET(v, 2, s48_enter_integer(y));
  S48_VECTOR_SET(v, 3, s48_enter_integer(width));
  S48_VECTOR_SET(v, 4, s48_enter_integer(height));
  S48_VECTOR_SET(v, 5, s48_enter_integer(border_width));
  S48_VECTOR_SET(v, 6, s48_enter_integer(depth));
  S48_GC_UNPROTECT();
  return v;
}

void scx_init_window(void) {
  S48_EXPORT_FUNCTION(scx_Create_Window);
  S48_EXPORT_FUNCTION(scx_Destroy_Window);
  S48_EXPORT_FUNCTION(scx_Change_Window_Attributes);
  S48_EXPORT_FUNCTION(scx_Get_Window_Attributes);
  S48_EXPORT_FUNCTION(scx_Configure_Window);
  S48_EXPORT_FUNCTION(scx_Map_Window);
  S48_EXPORT_FUNCTION(scx_Unmap_Window);
  S48_EXPORT_FUNCTION(scx_Destroy_Subwindows);
  S48_EXPORT_FUNCTION(scx_Map_Subwindows);
  S48_EXPORT_FUNCTION(scx_Unmap_Subwindows);  
  S48_EXPORT_FUNCTION(scx_Circulate_Subwindows);
  S48_EXPORT_FUNCTION(scx_Query_Tree);
  S48_EXPORT_FUNCTION(scx_Translate_Coordinates);
  S48_EXPORT_FUNCTION(scx_Query_Pointer);
  S48_EXPORT_FUNCTION(scx_Get_Geometry);
}