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/* Functions for the X window system.
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   Copyright (C) 1989, 1992 Free Software Foundation.
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This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Completely rewritten by Richard Stallman.  */

/* Rewritten for X11 by Joseph Arceneaux */

#if 0
#include <stdio.h>
#endif
#include <signal.h>
#include "config.h"
#include "lisp.h"
#include "xterm.h"
#include "screen.h"
#include "window.h"
#include "buffer.h"
#include "dispextern.h"
#include "xscrollbar.h"
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#include "keyboard.h"
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#ifdef HAVE_X_WINDOWS
extern void abort ();

void x_set_screen_param ();

#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))

#ifdef HAVE_X11
/* X Resource data base */
static XrmDatabase xrdb;

/* The class of this X application.  */
#define EMACS_CLASS "Emacs"

/* Title name and application name for X stuff. */
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extern char *x_id_name;
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extern Lisp_Object invocation_name;

/* The background and shape of the mouse pointer, and shape when not
   over text or in the modeline. */
Lisp_Object Vx_pointer_shape, Vx_nontext_pointer_shape, Vx_mode_pointer_shape;

/* Color of chars displayed in cursor box. */
Lisp_Object Vx_cursor_fore_pixel;

/* If non-nil, use vertical bar cursor. */
Lisp_Object Vbar_cursor;

/* The X Visual we are using for X windows (the default) */
Visual *screen_visual;

/* How many screens this X display has. */
int x_screen_count;

/* The vendor supporting this X server. */
Lisp_Object Vx_vendor;

/* The vendor's release number for this X server. */
int x_release;

/* Height of this X screen in pixels. */
int x_screen_height;

/* Height of this X screen in millimeters. */
int x_screen_height_mm;

/* Width of this X screen in pixels. */
int x_screen_width;

/* Width of this X screen in millimeters. */
int x_screen_width_mm;

/* Does this X screen do backing store? */
Lisp_Object Vx_backing_store;

/* Does this X screen do save-unders? */
int x_save_under;

/* Number of planes for this screen. */
int x_screen_planes;

/* X Visual type of this screen. */
Lisp_Object Vx_screen_visual;

/* Non nil if no window manager is in use. */
Lisp_Object Vx_no_window_manager;

static char *x_visual_strings[] =
  {
    "StaticGray",
    "GrayScale",
    "StaticColor",
    "PseudoColor",
    "TrueColor",
    "DirectColor"
  };

/* `t' if a mouse button is depressed. */

Lisp_Object Vmouse_depressed;

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extern unsigned int x_mouse_x, x_mouse_y, x_mouse_grabbed;
extern Lisp_Object unread_command_char;

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/* Atom for indicating window state to the window manager. */
Atom Xatom_wm_change_state;

/* When emacs became the selection owner. */
extern Time x_begin_selection_own;

/* The value of the current emacs selection. */
extern Lisp_Object Vx_selection_value;

/* Emacs' selection property identifier. */
extern Atom Xatom_emacs_selection;

/* Clipboard selection atom. */
extern Atom Xatom_clipboard_selection;

/* Clipboard atom. */
extern Atom Xatom_clipboard;

/* Atom for indicating incremental selection transfer. */
extern Atom Xatom_incremental;

/* Atom for indicating multiple selection request list */
extern Atom Xatom_multiple;

/* Atom for what targets emacs handles. */
extern Atom Xatom_targets;

/* Atom for indicating timstamp selection request */
extern Atom Xatom_timestamp;

/* Atom requesting we delete our selection. */
extern Atom Xatom_delete;

/* Selection magic. */
extern Atom Xatom_insert_selection;

/* Type of property for INSERT_SELECTION. */
extern Atom Xatom_pair;

/* More selection magic. */
extern Atom Xatom_insert_property;

/* Atom for indicating property type TEXT */
extern Atom Xatom_text;

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/* Communication with window managers. */
extern Atom Xatom_wm_protocols;

/* Kinds of protocol things we may receive. */
extern Atom Xatom_wm_take_focus;
extern Atom Xatom_wm_save_yourself;
extern Atom Xatom_wm_delete_window;

/* Other WM communication */
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extern Atom Xatom_wm_configure_denied; /* When our config request is denied */
extern Atom Xatom_wm_window_moved;     /* When the WM moves us. */
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#else	/* X10 */

/* Default size of an Emacs window without scroll bar.  */
static char *default_window = "=80x24+0+0";

#define MAXICID 80
char iconidentity[MAXICID];
#define ICONTAG "emacs@"
char minibuffer_iconidentity[MAXICID];
#define MINIBUFFER_ICONTAG "minibuffer@"

#endif /* X10 */

/* The last 23 bits of the timestamp of the last mouse button event. */
Time mouse_timestamp;

Lisp_Object Qundefined_color;
Lisp_Object Qx_screen_parameter;

extern Lisp_Object Vwindow_system_version;

/* Mouse map for clicks in windows.  */
extern Lisp_Object Vglobal_mouse_map;

/* Points to table of defined typefaces.  */
struct face *x_face_table[MAX_FACES_AND_GLYPHS];

/* Return the Emacs screen-object corresponding to an X window.
   It could be the screen's main window or an icon window.  */

struct screen *
x_window_to_screen (wdesc)
     int wdesc;
{
  Lisp_Object tail, screen;
  struct screen *s;

  for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      screen = XCONS (tail)->car;
      if (XTYPE (screen) != Lisp_Screen)
        continue;
      s = XSCREEN (screen);
      if (s->display.x->window_desc == wdesc
          || s->display.x->icon_desc == wdesc)
        return s;
    }
  return 0;
}

/* Map an X window that implements a scroll bar to the Emacs screen it
   belongs to.  Also store in *PART a symbol identifying which part of
   the scroll bar it is.  */

struct screen *
x_window_to_scrollbar (wdesc, part_ptr, prefix_ptr)
     int wdesc;
     Lisp_Object *part_ptr;
     enum scroll_bar_prefix *prefix_ptr;
{
  Lisp_Object tail, screen;
  struct screen *s;

  for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      screen = XCONS (tail)->car;
      if (XTYPE (screen) != Lisp_Screen)
        continue;

      s = XSCREEN (screen);
      if (part_ptr == 0 && prefix_ptr == 0)
        return s;

      if (s->display.x->v_scrollbar == wdesc)
        {
	  *part_ptr = Qvscrollbar_part;
          *prefix_ptr = VSCROLL_BAR_PREFIX;
          return s;
        }
      else if (s->display.x->v_slider == wdesc)
        {
          *part_ptr = Qvslider_part;
          *prefix_ptr = VSCROLL_SLIDER_PREFIX;
          return s;
        }
      else if (s->display.x->v_thumbup == wdesc)
        {
          *part_ptr = Qvthumbup_part;
          *prefix_ptr = VSCROLL_THUMBUP_PREFIX;
          return s;
        }
      else if (s->display.x->v_thumbdown == wdesc)
        {
          *part_ptr = Qvthumbdown_part;
          *prefix_ptr = VSCROLL_THUMBDOWN_PREFIX;
          return s;
        }
      else if (s->display.x->h_scrollbar == wdesc)
        {
          *part_ptr = Qhscrollbar_part;
          *prefix_ptr = HSCROLL_BAR_PREFIX;
          return s;
        }
      else if (s->display.x->h_slider == wdesc)
        {
          *part_ptr = Qhslider_part;
          *prefix_ptr = HSCROLL_SLIDER_PREFIX;
          return s;
        }
      else if (s->display.x->h_thumbleft == wdesc)
        {
          *part_ptr = Qhthumbleft_part;
          *prefix_ptr = HSCROLL_THUMBLEFT_PREFIX;
          return s;
        }
      else if (s->display.x->h_thumbright == wdesc)
        {
          *part_ptr = Qhthumbright_part;
          *prefix_ptr = HSCROLL_THUMBRIGHT_PREFIX;
          return s;
        }
    }
  return 0;
}

/* Connect the screen-parameter names for X screens
   to the ways of passing the parameter values to the window system.

   The name of a parameter, as a Lisp symbol,
   has an `x-screen-parameter' property which is an integer in Lisp
   but can be interpreted as an `enum x_screen_parm' in C.  */

enum x_screen_parm
{
  X_PARM_FOREGROUND_COLOR,
  X_PARM_BACKGROUND_COLOR,
  X_PARM_MOUSE_COLOR,
  X_PARM_CURSOR_COLOR,
  X_PARM_BORDER_COLOR,
  X_PARM_ICON_TYPE,
  X_PARM_FONT,
  X_PARM_BORDER_WIDTH,
  X_PARM_INTERNAL_BORDER_WIDTH,
  X_PARM_NAME,
  X_PARM_AUTORAISE,
  X_PARM_AUTOLOWER,
  X_PARM_VERT_SCROLLBAR,
  X_PARM_HORIZ_SCROLLBAR,
};


struct x_screen_parm_table
{
  char *name;
  void (*setter)( /* struct screen *screen, Lisp_Object val, oldval */ );
};

void x_set_foreground_color ();
void x_set_background_color ();
void x_set_mouse_color ();
void x_set_cursor_color ();
void x_set_border_color ();
void x_set_icon_type ();
void x_set_font ();
void x_set_border_width ();
void x_set_internal_border_width ();
void x_set_name ();
void x_set_autoraise ();
void x_set_autolower ();
void x_set_vertical_scrollbar ();
void x_set_horizontal_scrollbar ();

static struct x_screen_parm_table x_screen_parms[] =
{
  "foreground-color", x_set_foreground_color,
  "background-color", x_set_background_color,
  "mouse-color", x_set_mouse_color,
  "cursor-color", x_set_cursor_color,
  "border-color", x_set_border_color,
  "icon-type", x_set_icon_type,
  "font", x_set_font,
  "border-width", x_set_border_width,
  "internal-border-width", x_set_internal_border_width,
  "name", x_set_name,
  "autoraise", x_set_autoraise,
  "autolower", x_set_autolower,
  "vertical-scrollbar", x_set_vertical_scrollbar,
  "horizontal-scrollbar", x_set_horizontal_scrollbar,
};

/* Attach the `x-screen-parameter' properties to
   the Lisp symbol names of parameters relevant to X.  */

init_x_parm_symbols ()
{
  int i;

  Qx_screen_parameter = intern ("x-screen-parameter");

  for (i = 0; i < sizeof (x_screen_parms)/sizeof (x_screen_parms[0]); i++)
    Fput (intern (x_screen_parms[i].name), Qx_screen_parameter,
	  make_number (i));
}

/* Report to X that a screen parameter of screen S is being set or changed.
   PARAM is the symbol that says which parameter.
   VAL is the new value.
   OLDVAL is the old value.
   If the parameter is not specially recognized, do nothing;
   otherwise the `x_set_...' function for this parameter.  */

void
x_set_screen_param (s, param, val, oldval)
     register struct screen *s;
     Lisp_Object param;
     register Lisp_Object val;
     register Lisp_Object oldval;
{
  register Lisp_Object tem;
  tem = Fget (param, Qx_screen_parameter);
  if (XTYPE (tem) == Lisp_Int
      && XINT (tem) >= 0
      && XINT (tem) < sizeof (x_screen_parms)/sizeof (x_screen_parms[0]))
    (*x_screen_parms[XINT (tem)].setter)(s, val, oldval);
}

/* Insert a description of internally-recorded parameters of screen X
   into the parameter alist *ALISTPTR that is to be given to the user.
   Only parameters that are specific to the X window system
   and whose values are not correctly recorded in the screen's
   param_alist need to be considered here.  */

x_report_screen_params (s, alistptr)
     struct screen *s;
     Lisp_Object *alistptr;
{
  char buf[16];

  store_in_alist (alistptr, "left", make_number (s->display.x->left_pos));
  store_in_alist (alistptr, "top", make_number (s->display.x->top_pos));
  store_in_alist (alistptr, "border-width",
       	   make_number (s->display.x->border_width));
  store_in_alist (alistptr, "internal-border-width",
       	   make_number (s->display.x->internal_border_width));
  sprintf (buf, "%d", s->display.x->window_desc);
  store_in_alist (alistptr, "window-id",
       	   build_string (buf));
}

/* Decide if color named COLOR is valid for the display
   associated with the selected screen. */
int
defined_color (color, color_def)
     char *color;
     Color *color_def;
{
  register int foo;
  Colormap screen_colormap;

  BLOCK_INPUT;
#ifdef HAVE_X11
  screen_colormap
    = DefaultColormap (x_current_display, XDefaultScreen (x_current_display));

  foo = XParseColor (x_current_display, screen_colormap,
       	      color, color_def)
    && XAllocColor (x_current_display, screen_colormap, color_def);
#else
  foo = XParseColor (color, color_def) && XGetHardwareColor (color_def);
#endif /* not HAVE_X11 */
  UNBLOCK_INPUT;

  if (foo)
    return 1;
  else
    return 0;
}

/* Given a string ARG naming a color, compute a pixel value from it
   suitable for screen S.
   If S is not a color screen, return DEF (default) regardless of what
   ARG says.  */

int
x_decode_color (arg, def)
     Lisp_Object arg;
     int def;
{
  Color cdef;

  CHECK_STRING (arg, 0);

  if (strcmp (XSTRING (arg)->data, "black") == 0)
    return BLACK_PIX_DEFAULT;
  else if (strcmp (XSTRING (arg)->data, "white") == 0)
    return WHITE_PIX_DEFAULT;

#ifdef HAVE_X11
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  if (XFASTINT (x_screen_planes) == 1)
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    return def;
#else
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  if (DISPLAY_CELLS == 1)
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    return def;
#endif

  if (defined_color (XSTRING (arg)->data, &cdef))
    return cdef.pixel;
  else
    Fsignal (Qundefined_color, Fcons (arg, Qnil));
}

/* Functions called only from `x_set_screen_param'
   to set individual parameters.

   If s->display.x->window_desc is 0,
   the screen is being created and its X-window does not exist yet.
   In that case, just record the parameter's new value
   in the standard place; do not attempt to change the window.  */

void
x_set_foreground_color (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  s->display.x->foreground_pixel = x_decode_color (arg, BLACK_PIX_DEFAULT);
  if (s->display.x->window_desc != 0)
    {
#ifdef HAVE_X11
      BLOCK_INPUT;
      XSetForeground (x_current_display, s->display.x->normal_gc,
		      s->display.x->foreground_pixel);
      XSetBackground (x_current_display, s->display.x->reverse_gc,
		      s->display.x->foreground_pixel);
      if (s->display.x->v_scrollbar)
        {
          Pixmap  up_arrow_pixmap, down_arrow_pixmap, slider_pixmap;

          XSetWindowBorder (x_current_display, s->display.x->v_scrollbar,
			    s->display.x->foreground_pixel);

          slider_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 gray_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));
          up_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 up_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));
          down_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 down_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));

          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->v_thumbup,
				      up_arrow_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->v_thumbdown,
				      down_arrow_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->v_slider,
				      slider_pixmap);

          XClearWindow (XDISPLAY s->display.x->v_thumbup);
          XClearWindow (XDISPLAY s->display.x->v_thumbdown);
          XClearWindow (XDISPLAY s->display.x->v_slider);

          XFreePixmap (x_current_display, down_arrow_pixmap);
          XFreePixmap (x_current_display, up_arrow_pixmap);
          XFreePixmap (x_current_display, slider_pixmap);
        }
      if (s->display.x->h_scrollbar)
        {
          Pixmap left_arrow_pixmap, right_arrow_pixmap, slider_pixmap;

          XSetWindowBorder (x_current_display, s->display.x->h_scrollbar,
			    s->display.x->foreground_pixel);

          slider_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 gray_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));

          left_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 up_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));
          right_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 down_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));

          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->h_slider,
				      slider_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->h_thumbleft,
				      left_arrow_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->h_thumbright,
				      right_arrow_pixmap);

          XClearWindow (XDISPLAY s->display.x->h_thumbleft);
          XClearWindow (XDISPLAY s->display.x->h_thumbright);
          XClearWindow (XDISPLAY s->display.x->h_slider);

          XFreePixmap (x_current_display, slider_pixmap);
          XFreePixmap (x_current_display, left_arrow_pixmap);
          XFreePixmap (x_current_display, right_arrow_pixmap);
        }
      UNBLOCK_INPUT;
#endif				/* HAVE_X11 */
      if (s->visible)
        redraw_screen (s);
    }
}

void
x_set_background_color (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  Pixmap temp;
  int mask;

  s->display.x->background_pixel = x_decode_color (arg, WHITE_PIX_DEFAULT);

  if (s->display.x->window_desc != 0)
    {
      BLOCK_INPUT;
#ifdef HAVE_X11
      /* The main screen. */
      XSetBackground (x_current_display, s->display.x->normal_gc,
		      s->display.x->background_pixel);
      XSetForeground (x_current_display, s->display.x->reverse_gc,
		      s->display.x->background_pixel);
      XSetWindowBackground (x_current_display, s->display.x->window_desc,
			    s->display.x->background_pixel);

      /* Scroll bars. */
      if (s->display.x->v_scrollbar)
        {
          Pixmap  up_arrow_pixmap, down_arrow_pixmap, slider_pixmap;

          XSetWindowBackground (x_current_display, s->display.x->v_scrollbar,
				s->display.x->background_pixel);

          slider_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 gray_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));
          up_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 up_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));
          down_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 down_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));

          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->v_thumbup,
				      up_arrow_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->v_thumbdown,
				      down_arrow_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->v_slider,
				      slider_pixmap);

          XClearWindow (XDISPLAY s->display.x->v_thumbup);
          XClearWindow (XDISPLAY s->display.x->v_thumbdown);
          XClearWindow (XDISPLAY s->display.x->v_slider);

          XFreePixmap (x_current_display, down_arrow_pixmap);
          XFreePixmap (x_current_display, up_arrow_pixmap);
          XFreePixmap (x_current_display, slider_pixmap);
        }
      if (s->display.x->h_scrollbar)
        {
          Pixmap left_arrow_pixmap, right_arrow_pixmap, slider_pixmap;

          XSetWindowBackground (x_current_display, s->display.x->h_scrollbar,
				s->display.x->background_pixel);

          slider_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 gray_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));

          left_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 up_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));
          right_arrow_pixmap =
            XCreatePixmapFromBitmapData (XDISPLAY s->display.x->window_desc,
					 down_arrow_bits, 16, 16,
					 s->display.x->foreground_pixel,
					 s->display.x->background_pixel,
					 DefaultDepth (x_current_display,
						       XDefaultScreen (x_current_display)));

          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->h_slider,
				      slider_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->h_thumbleft,
				      left_arrow_pixmap);
          XSetWindowBackgroundPixmap (XDISPLAY s->display.x->h_thumbright,
				      right_arrow_pixmap);

          XClearWindow (XDISPLAY s->display.x->h_thumbleft);
          XClearWindow (XDISPLAY s->display.x->h_thumbright);
          XClearWindow (XDISPLAY s->display.x->h_slider);

          XFreePixmap (x_current_display, slider_pixmap);
          XFreePixmap (x_current_display, left_arrow_pixmap);
          XFreePixmap (x_current_display, right_arrow_pixmap);
        }
#else
      temp = XMakeTile (s->display.x->background_pixel);
      XChangeBackground (s->display.x->window_desc, temp);
      XFreePixmap (temp);
#endif				/* not HAVE_X11 */
      UNBLOCK_INPUT;

      if (s->visible)
        redraw_screen (s);
    }
}

void
x_set_mouse_color (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  Cursor cursor, nontext_cursor, mode_cursor;
  int mask_color;

  if (!EQ (Qnil, arg))
    s->display.x->mouse_pixel = x_decode_color (arg, BLACK_PIX_DEFAULT);
  mask_color = s->display.x->background_pixel;
				/* No invisible pointers. */
  if (mask_color == s->display.x->mouse_pixel
	&& mask_color == s->display.x->background_pixel)
    s->display.x->mouse_pixel = s->display.x->foreground_pixel;

  BLOCK_INPUT;
#ifdef HAVE_X11
  if (!EQ (Qnil, Vx_pointer_shape))
    {
      CHECK_NUMBER (Vx_pointer_shape, 0);
      cursor = XCreateFontCursor (x_current_display, XINT (Vx_pointer_shape));
    }
  else
    cursor = XCreateFontCursor (x_current_display, XC_xterm);

  if (!EQ (Qnil, Vx_nontext_pointer_shape))
    {
      CHECK_NUMBER (Vx_nontext_pointer_shape, 0);
      nontext_cursor = XCreateFontCursor (x_current_display,
					  XINT (Vx_nontext_pointer_shape));
    }
  else
    nontext_cursor = XCreateFontCursor (x_current_display, XC_left_ptr);

  if (!EQ (Qnil, Vx_mode_pointer_shape))
    {
      CHECK_NUMBER (Vx_mode_pointer_shape, 0);
      mode_cursor = XCreateFontCursor (x_current_display,
					  XINT (Vx_mode_pointer_shape));
    }
  else
    mode_cursor = XCreateFontCursor (x_current_display, XC_xterm);

  {
    XColor fore_color, back_color;

    fore_color.pixel = s->display.x->mouse_pixel;
    back_color.pixel = mask_color;
    XQueryColor (x_current_display,
		 DefaultColormap (x_current_display,
				  DefaultScreen (x_current_display)),
		 &fore_color);
    XQueryColor (x_current_display,
		 DefaultColormap (x_current_display,
				  DefaultScreen (x_current_display)),
		 &back_color);
    XRecolorCursor (x_current_display, cursor,
		    &fore_color, &back_color);
    XRecolorCursor (x_current_display, nontext_cursor,
		    &fore_color, &back_color);
    XRecolorCursor (x_current_display, mode_cursor,
		    &fore_color, &back_color);
  }
#else /* X10 */
  cursor = XCreateCursor (16, 16, MouseCursor, MouseMask,
			  0, 0,
			  s->display.x->mouse_pixel,
			  s->display.x->background_pixel,
			  GXcopy);
#endif /* X10 */

  if (s->display.x->window_desc != 0)
    {
      XDefineCursor (XDISPLAY s->display.x->window_desc, cursor);
    }

  if (cursor != s->display.x->text_cursor && s->display.x->text_cursor != 0)
      XFreeCursor (XDISPLAY s->display.x->text_cursor);
  s->display.x->text_cursor = cursor;
#ifdef HAVE_X11
  if (nontext_cursor != s->display.x->nontext_cursor
      && s->display.x->nontext_cursor != 0)
      XFreeCursor (XDISPLAY s->display.x->nontext_cursor);
  s->display.x->nontext_cursor = nontext_cursor;

  if (mode_cursor != s->display.x->modeline_cursor
      && s->display.x->modeline_cursor != 0)
      XFreeCursor (XDISPLAY s->display.x->modeline_cursor);
  s->display.x->modeline_cursor = mode_cursor;
#endif	/* HAVE_X11 */

  XFlushQueue ();
  UNBLOCK_INPUT;
}

void
x_set_cursor_color (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  unsigned long fore_pixel;

  if (!EQ (Vx_cursor_fore_pixel, Qnil))
    fore_pixel = x_decode_color (Vx_cursor_fore_pixel, WHITE_PIX_DEFAULT);
  else
    fore_pixel = s->display.x->background_pixel;
  s->display.x->cursor_pixel = x_decode_color (arg, BLACK_PIX_DEFAULT);
				/* No invisible cursors */
  if (s->display.x->cursor_pixel == s->display.x->background_pixel)
    {
      s->display.x->cursor_pixel == s->display.x->mouse_pixel;
      if (s->display.x->cursor_pixel == fore_pixel)
	fore_pixel = s->display.x->background_pixel;
    }

  if (s->display.x->window_desc != 0)
    {
#ifdef HAVE_X11
      BLOCK_INPUT;
      XSetBackground (x_current_display, s->display.x->cursor_gc,
		      s->display.x->cursor_pixel);
      XSetForeground (x_current_display, s->display.x->cursor_gc,
		      fore_pixel);
      UNBLOCK_INPUT;
#endif /* HAVE_X11 */

      if (s->visible)
	{
	  x_display_cursor (s, 0);
	  x_display_cursor (s, 1);
	}
    }
}

/* Set the border-color of screen S to value described by ARG.
   ARG can be a string naming a color.
   The border-color is used for the border that is drawn by the X server.
   Note that this does not fully take effect if done before
   S has an x-window; it must be redone when the window is created.

   Note: this is done in two routines because of the way X10 works.

   Note: under X11, this is normally the province of the window manager,
   and so emacs' border colors may be overridden. */

void
x_set_border_color (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  unsigned char *str;
  int pix;

  CHECK_STRING (arg, 0);
  str = XSTRING (arg)->data;

#ifndef HAVE_X11
  if (!strcmp (str, "grey") || !strcmp (str, "Grey")
      || !strcmp (str, "gray") || !strcmp (str, "Gray"))
    pix = -1;
  else
#endif /* X10 */

    pix = x_decode_color (arg, BLACK_PIX_DEFAULT);

  x_set_border_pixel (s, pix);
}

/* Set the border-color of screen S to pixel value PIX.
   Note that this does not fully take effect if done before
   S has an x-window.  */

x_set_border_pixel (s, pix)
     struct screen *s;
     int pix;
{
  s->display.x->border_pixel = pix;

  if (s->display.x->window_desc != 0 && s->display.x->border_width > 0)
    {
      Pixmap temp;
      int mask;

      BLOCK_INPUT;
#ifdef HAVE_X11
      XSetWindowBorder (x_current_display, s->display.x->window_desc,
       		 pix);
      if (s->display.x->h_scrollbar)
        XSetWindowBorder (x_current_display, s->display.x->h_slider,
       		   pix);
      if (s->display.x->v_scrollbar)
        XSetWindowBorder (x_current_display, s->display.x->v_slider,
       		   pix);
#else
      if (pix < 0)
        temp = XMakePixmap ((Bitmap) XStoreBitmap (16, 16, gray_bits),
       		     BLACK_PIX_DEFAULT, WHITE_PIX_DEFAULT);
      else
        temp = XMakeTile (pix);
      XChangeBorder (s->display.x->window_desc, temp);
      XFreePixmap (XDISPLAY temp);
#endif /* not HAVE_X11 */
      UNBLOCK_INPUT;

      if (s->visible)
        redraw_screen (s);
    }
}

void
x_set_icon_type (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  Lisp_Object tem;
  int result;

  if (EQ (oldval, Qnil) == EQ (arg, Qnil))
    return;

  BLOCK_INPUT;
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  if (NILP (arg))
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    result = x_text_icon (s, 0);
  else
    result = x_bitmap_icon (s, 0);

  if (result)
    {
      error ("No icon window available.");
      UNBLOCK_INPUT;
    }

  /* If the window was unmapped (and its icon was mapped),
     the new icon is not mapped, so map the window in its stead.  */
  if (s->visible)
    XMapWindow (XDISPLAY s->display.x->window_desc);

  XFlushQueue ();
  UNBLOCK_INPUT;
}

void
x_set_font (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  unsigned char *name;
  int result;

  CHECK_STRING (arg, 1);
  name = XSTRING (arg)->data;

  BLOCK_INPUT;
  result = x_new_font (s, name);
  UNBLOCK_INPUT;
  
  if (result)
    error ("Font \"%s\" is not defined", name);
}

void
x_set_border_width (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  CHECK_NUMBER (arg, 0);

  if (XINT (arg) == s->display.x->border_width)
    return;

  if (s->display.x->window_desc != 0)
    error ("Cannot change the border width of a window");

  s->display.x->border_width = XINT (arg);
}

void
x_set_internal_border_width (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  int mask;
  int old = s->display.x->internal_border_width;

  CHECK_NUMBER (arg, 0);
  s->display.x->internal_border_width = XINT (arg);
  if (s->display.x->internal_border_width < 0)
    s->display.x->internal_border_width = 0;

  if (s->display.x->internal_border_width == old)
    return;

  if (s->display.x->window_desc != 0)
    {
      BLOCK_INPUT;
      x_set_window_size (s, s->width, s->height);
#if 0
      x_set_resize_hint (s);
#endif
      XFlushQueue ();
      UNBLOCK_INPUT;
      SET_SCREEN_GARBAGED (s);
    }
}

void
x_set_name (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  CHECK_STRING (arg, 0);

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  /* Don't change the name if it's already ARG.  */
  if (! NILP (Fstring_equal (arg, s->name)))
    return;

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  if (s->display.x->window_desc)
    {
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#ifdef HAVE_X11
      XTextProperty prop;
      prop.value = XSTRING (arg)->data;
      prop.encoding = XA_STRING;
      prop.format = 8;
      prop.nitems = XSTRING (arg)->size;
      BLOCK_INPUT;
      XSetWMName (XDISPLAY s->display.x->window_desc, &prop);
      XSetWMIconName (XDISPLAY s->display.x->window_desc, &prop);
      UNBLOCK_INPUT;
#else
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      BLOCK_INPUT;
      XStoreName (XDISPLAY s->display.x->window_desc,
		  (char *) XSTRING (arg)->data);
      XSetIconName (XDISPLAY s->display.x->window_desc,
		    (char *) XSTRING (arg)->data);
      UNBLOCK_INPUT;
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#endif
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    }
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  s->name = arg;
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}

void
x_set_autoraise (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  s->auto_raise = !EQ (Qnil, arg);
}

void
x_set_autolower (s, arg, oldval)
     struct screen *s;
     Lisp_Object arg, oldval;
{
  s->auto_lower = !EQ (Qnil, arg);
}

#ifdef HAVE_X11
int n_faces;

x_set_face (scr, font, background, foreground, stipple)
     struct screen *scr;
     XFontStruct *font;
     unsigned long background, foreground;
     Pixmap stipple;
{
  XGCValues gc_values;
  GC temp_gc;
  unsigned long gc_mask;
  struct face *new_face;
  unsigned int width = 16;
  unsigned int height = 16;

  if (n_faces == MAX_FACES_AND_GLYPHS)
    return 1;

  /* Create the Graphics Context. */
  gc_values.font = font->fid;
  gc_values.foreground = foreground;
  gc_values.background = background;
  gc_values.line_width = 0;
  gc_mask = GCLineWidth | GCFont | GCForeground | GCBackground;
  if (stipple)
    {
      gc_values.stipple
	= XCreateBitmapFromData (x_current_display, ROOT_WINDOW,
				 (char *) stipple, width, height);
      gc_mask |= GCStipple;
    }

  temp_gc = XCreateGC (x_current_display, scr->display.x->window_desc,
		       gc_mask, &gc_values);
  if (!temp_gc)
    return 1;
  new_face = (struct face *) xmalloc (sizeof (struct face));
  if (!new_face)
    {
      XFreeGC (x_current_display, temp_gc);
      return 1;
    }

  new_face->font = font;
  new_face->foreground = foreground;
  new_face->background = background;
  new_face->face_gc = temp_gc;
  if (stipple)
    new_face->stipple = gc_values.stipple;

  x_face_table[++n_faces] = new_face;
  return 1;
}

x_set_glyph (scr, glyph)
{
}

#if 0
DEFUN ("x-set-face-font", Fx_set_face_font, Sx_set_face_font, 4, 2, 0,
  "Specify face table entry FACE-CODE to be the font named by FONT,\n\
   in colors FOREGROUND and BACKGROUND.")
  (face_code, font_name, foreground, background)
     Lisp_Object face_code;
     Lisp_Object font_name;
     Lisp_Object foreground;
     Lisp_Object background;
{
  register struct face *fp;	/* Current face info. */
  register int fn;		/* Face number. */
  register FONT_TYPE *f;	/* Font data structure. */
  unsigned char *newname;
  int fg, bg;
  GC temp_gc;
  XGCValues gc_values;

  /* Need to do something about this. */
  Drawable drawable = selected_screen->display.x->window_desc;

  CHECK_NUMBER (face_code, 1);
  CHECK_STRING (font_name,  2);

  if (EQ (foreground, Qnil) || EQ (background, Qnil))
    {
      fg = selected_screen->display.x->foreground_pixel;
      bg = selected_screen->display.x->background_pixel;
    }
  else
    {
      CHECK_NUMBER (foreground, 0);
      CHECK_NUMBER (background, 1);

      fg = x_decode_color (XINT (foreground), BLACK_PIX_DEFAULT);
      bg = x_decode_color (XINT (background), WHITE_PIX_DEFAULT);
    }

  fn = XINT (face_code);
  if ((fn < 1) || (fn > 255))
    error ("Invalid face code, %d", fn);

  newname = XSTRING (font_name)->data;
  BLOCK_INPUT;
  f = (*newname == 0 ? 0 : XGetFont (newname));
  UNBLOCK_INPUT;
  if (f == 0)
    error ("Font \"%s\" is not defined", newname);

  fp = x_face_table[fn];
  if (fp == 0)
    {
      x_face_table[fn] = fp = (struct face *) xmalloc (sizeof (struct face));
      bzero (fp, sizeof (struct face));
      fp->face_type = x_pixmap;
    }
  else if (FACE_IS_FONT (fn))
    {
      BLOCK_INPUT;
      XFreeGC (FACE_FONT (fn));
      UNBLOCK_INPUT;
    }
  else if (FACE_IS_IMAGE (fn)) /* This should not happen... */
    {
      BLOCK_INPUT;
      XFreePixmap (x_current_display, FACE_IMAGE (fn));
      fp->face_type = x_font;
      UNBLOCK_INPUT;
    }
  else
    abort ();

  fp->face_GLYPH.font_desc.font = f;
  gc_values.font = f->fid;
  gc_values.foreground = fg;
  gc_values.background = bg;
  fp->face_GLYPH.font_desc.face_gc = XCreateGC (x_current_display,
					       drawable, GCFont | GCForeground
					       | GCBackground, &gc_values);
  fp->face_GLYPH.font_desc.font_width = FONT_WIDTH (f);
  fp->face_GLYPH.font_desc.font_height = FONT_HEIGHT (f);

  return face_code;
}
#endif
#else	/* X10 */
DEFUN ("x-set-face", Fx_set_face, Sx_set_face, 4, 4, 0,
  "Specify face table entry FACE-CODE to be the font named by FONT,\n\
   in colors FOREGROUND and BACKGROUND.")
  (face_code, font_name, foreground, background)
     Lisp_Object face_code;
     Lisp_Object font_name;
     Lisp_Object foreground;
     Lisp_Object background;
{
  register struct face *fp;	/* Current face info. */
  register int fn;		/* Face number. */
  register FONT_TYPE *f;	/* Font data structure. */
  unsigned char *newname;

  CHECK_NUMBER (face_code, 1);
  CHECK_STRING (font_name,  2);

  fn = XINT (face_code);
  if ((fn < 1) || (fn > 255))
    error ("Invalid face code, %d", fn);

  /* Ask the server to find the specified font.  */
  newname = XSTRING (font_name)->data;
  BLOCK_INPUT;
  f = (*newname == 0 ? 0 : XGetFont (newname));
  UNBLOCK_INPUT;
  if (f == 0)
    error ("Font \"%s\" is not defined", newname);

  /* Get the face structure for face_code in the face table.
     Make sure it exists.  */
  fp = x_face_table[fn];
  if (fp == 0)
    {
      x_face_table[fn] = fp = (struct face *) xmalloc (sizeof (struct face));
      bzero (fp, sizeof (struct face));
    }

  /* If this face code already exists, get rid of the old font.  */
  if (fp->font != 0 && fp->font != f)
    {
      BLOCK_INPUT;
      XLoseFont (fp->font);
      UNBLOCK_INPUT;
    }

  /* Store the specified information in FP.  */
  fp->fg = x_decode_color (foreground, BLACK_PIX_DEFAULT);
  fp->bg = x_decode_color (background, WHITE_PIX_DEFAULT);
  fp->font = f;

  return face_code;
}
#endif	/* X10 */

#if 0
/* This is excluded because there is no painless way
   to get or to remember the name of the font.  */

DEFUN ("x-get-face", Fx_get_face, Sx_get_face, 1, 1, 0,
  "Get data defining face code FACE.  FACE is an integer.\n\
The value is a list (FONT FG-COLOR BG-COLOR).")
  (face)
     Lisp_Object face;
{
  register struct face *fp;	/* Current face info. */
  register int fn;		/* Face number. */

  CHECK_NUMBER (face, 1);
  fn = XINT (face);
  if ((fn < 1) || (fn > 255))
    error ("Invalid face code, %d", fn);

  /* Make sure the face table exists and this face code is defined.  */
  if (x_face_table == 0 || x_face_table[fn] == 0)
    return Qnil;

  fp = x_face_table[fn];

  return Fcons (build_string (fp->name),
       	 Fcons (make_number (fp->fg),
       		Fcons (make_number (fp->bg), Qnil)));
}
#endif /* 0 */

/* Subroutines of creating an X screen.  */

#ifdef HAVE_X11
extern char *x_get_string_resource ();
extern XrmDatabase x_load_resources ();

DEFUN ("x-get-resource", Fx_get_resource, Sx_get_resource, 1, 3, 0,
  "Retrieve the value of ATTRIBUTE from the X defaults database.  This\n\
searches using a key of the form \"INSTANCE.ATTRIBUTE\", with class\n\
\"Emacs\", where INSTANCE is the name under which Emacs was invoked.\n\
\n\
Optional arguments COMPONENT and CLASS specify the component for which\n\
we should look up ATTRIBUTE.  When specified, Emacs searches using a\n\
key of the form INSTANCE.COMPONENT.ATTRIBUTE, with class \"Emacs.CLASS\".")
  (attribute, name, class)
     Lisp_Object attribute, name, class;
{
  register char *value;
  char *name_key;
  char *class_key;

  CHECK_STRING (attribute, 0);
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  if (!NILP (name))
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    CHECK_STRING (name, 1);
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  if (!NILP (class))
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    CHECK_STRING (class, 2);
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  if (NILP (name) != NILP (class))
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    error ("x-get-resource: must specify both NAME and CLASS or neither");

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  if (NILP (name))
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    {
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      name_key = (char *) alloca (XSTRING (invocation_name)->size + 1
				  + XSTRING (attribute)->size + 1);

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      sprintf (name_key, "%s.%s",
	       XSTRING (invocation_name)->data,
	       XSTRING (attribute)->data);
      class_key = EMACS_CLASS;
    }
  else
    {
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      name_key = (char *) alloca (XSTRING (invocation_name)->size + 1
				  + XSTRING (name)->size + 1
				  + XSTRING (attribute)->size + 1);

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      class_key = (char *) alloca (sizeof (EMACS_CLASS)
				   + XSTRING (class)->size + 1);

      sprintf (name_key, "%s.%s.%s",
	       XSTRING (invocation_name)->data,
	       XSTRING (name)->data,
	       XSTRING (attribute)->data);
      sprintf (class_key, "%s.%s",
	       XSTRING (invocation_name)->data,
	       XSTRING (class)->data);
    }

  value = x_get_string_resource (xrdb, name_key, class_key);

  if (value != (char *) 0)
    return build_string (value);
  else
    return Qnil;
}

#else	/* X10 */

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DEFUN ("x-get-default", Fx_get_default, Sx_get_default, 1, 1, 0,
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       "Get X default ATTRIBUTE from the system, or nil if no default.\n\
Value is a string (when not nil) and ATTRIBUTE is also a string.\n\
The defaults are specified in the file `~/.Xdefaults'.")
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  (arg)
     Lisp_Object arg;
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{
  register unsigned char *value;

  CHECK_STRING (arg, 1);

  value = (unsigned char *) XGetDefault (XDISPLAY 
					 XSTRING (invocation_name)->data,
					 XSTRING (arg)->data);
  if (value == 0)
    /* Try reversing last two args, in case this is the buggy version of X.  */
    value = (unsigned char *) XGetDefault (XDISPLAY
					   XSTRING (arg)->data,
					   XSTRING (invocation_name)->data);
  if (value != 0)
    return build_string (value);
  else
    return (Qnil);
}

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#define Fx_get_resource(attribute, name, class) Fx_get_default(attribute)
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#endif	/* X10 */

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/* Types we might convert a resource string into.  */
enum resource_types
  {
    number, boolean, string,
  };

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/* Return the value of parameter PARAM.
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   First search ALIST, then Vdefault_screen_alist, then the X defaults
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   database, using ATTRIBUTE as the attribute name.
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   Convert the resource to the type specified by desired_type.

   If no default is specified, return nil.  */
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static Lisp_Object
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x_get_arg (alist, param, attribute, type)
     Lisp_Object alist, param;
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     char *attribute;
     enum resource_types type;
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{
  register Lisp_Object tem;

  tem = Fassq (param, alist);
  if (EQ (tem, Qnil))
    tem = Fassq (param, Vdefault_screen_alist);
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  if (EQ (tem, Qnil) && attribute)
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    {
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      tem = Fx_get_resource (build_string (attribute), Qnil, Qnil);
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      if (NILP (tem))
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	return Qnil;

      switch (type)
	{
	case number:
	  return make_number (atoi (XSTRING (tem)->data));

	case boolean:
	  tem = Fdowncase (tem);
	  if (!strcmp (XSTRING (tem)->data, "on")
	      || !strcmp (XSTRING (tem)->data, "true"))
	    return Qt;
	  else 
	    return Qnil;

	case string:
	  return tem;

	default:
	  abort ();
	}
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    }
  return Fcdr (tem);
}

/* Record in screen S the specified or default value according to ALIST
   of the parameter named PARAM (a Lisp symbol).
   If no value is specified for PARAM, look for an X default for XPROP
   on the screen named NAME.
   If that is not found either, use the value DEFLT.  */

static Lisp_Object
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x_default_parameter (s, alist, propname, deflt, xprop, type)
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     struct screen *s;
     Lisp_Object alist;
     char *propname;
     Lisp_Object deflt;
     char *xprop;
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     enum resource_types type;
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{
  Lisp_Object propsym = intern (propname);
  Lisp_Object tem;

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  tem = x_get_arg (alist, propsym, xprop, type);
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  if (EQ (tem, Qnil))
    tem = deflt;
  store_screen_param (s, propsym, tem);
  x_set_screen_param (s, propsym, tem, Qnil);
  return tem;
}

DEFUN ("x-geometry", Fx_geometry, Sx_geometry, 1, 1, 0,
       "Parse an X-style geometry string STRING.\n\
Returns an alist of the form ((top . TOP), (left . LEFT) ... ).")
     (string)
{
  int geometry, x, y;
  unsigned int width, height;
  Lisp_Object values[4];

  CHECK_STRING (string, 0);

  geometry = XParseGeometry ((char *) XSTRING (string)->data,
			     &x, &y, &width, &height);

  switch (geometry & 0xf)	/* Mask out {X,Y}Negative */
    {
    case (XValue | YValue):
      /* What's one pixel among friends?
	 Perhaps fix this some day by returning symbol `extreme-top'... */
      if (x == 0 && (geometry & XNegative))
	x = -1;
      if (y == 0 && (geometry & YNegative))
	y = -1;
      values[0] = Fcons (intern ("left"), make_number (x));
      values[1] = Fcons (intern ("top"), make_number (y));
      return Flist (2, values);
      break;

    case (WidthValue | HeightValue):
      values[0] = Fcons (intern ("width"), make_number (width));
      values[1] = Fcons (intern ("height"), make_number (height));
      return Flist (2, values);
      break;

    case (XValue | YValue | WidthValue | HeightValue):
      if (x == 0 && (geometry & XNegative))
	x = -1;
      if (y == 0 && (geometry & YNegative))
	y = -1;
      values[0] = Fcons (intern ("width"), make_number (width));
      values[1] = Fcons (intern ("height"), make_number (height));
      values[2] = Fcons (intern ("left"), make_number (x));
      values[3] = Fcons (intern ("top"), make_number (y));
      return Flist (4, values);
      break;

    case 0:
	return Qnil;
      
    default:
      error ("Must specify x and y value, and/or width and height");
    }
}

#ifdef HAVE_X11
/* Calculate the desired size and position of this window,
   or set rubber-band prompting if none. */

#define DEFAULT_ROWS 40
#define DEFAULT_COLS 80

static
x_figure_window_size (s, parms)
     struct screen *s;
     Lisp_Object parms;
{
  register Lisp_Object tem0, tem1;
  int height, width, left, top;
  register int geometry;
  long window_prompting = 0;

  /* Default values if we fall through.
     Actually, if that happens we should get
     window manager prompting. */
  s->width = DEFAULT_COLS;
  s->height = DEFAULT_ROWS;
  s->display.x->top_pos = 1;
  s->display.x->left_pos = 1;

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  tem0 = x_get_arg (parms, intern ("height"), 0, 0);
  tem1 = x_get_arg (parms, intern ("width"), 0, 0);
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  if (! EQ (tem0, Qnil) && ! EQ (tem1, Qnil))
    {
      CHECK_NUMBER (tem0, 0);
      CHECK_NUMBER (tem1, 0);
      s->height = XINT (tem0);
      s->width = XINT (tem1);
      window_prompting |= USSize;
    }
  else if (! EQ (tem0, Qnil) || ! EQ (tem1, Qnil))
    error ("Must specify *both* height and width");

  s->display.x->pixel_width = (FONT_WIDTH (s->display.x->font) * s->width
			       + 2 * s->display.x->internal_border_width);
  s->display.x->pixel_height = (FONT_HEIGHT (s->display.x->font) * s->height
				+ 2 * s->display.x->internal_border_width);

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  tem0 = x_get_arg (parms, intern ("top"), 0, 0);
  tem1 = x_get_arg (parms, intern ("left"), 0, 0);
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  if (! EQ (tem0, Qnil) && ! EQ (tem1, Qnil))
    {
      CHECK_NUMBER (tem0, 0);
      CHECK_NUMBER (tem1, 0);
      s->display.x->top_pos = XINT (tem0);
      s->display.x->left_pos = XINT (tem1);
      x_calc_absolute_position (s);
      window_prompting |= USPosition;
    }
  else if (! EQ (tem0, Qnil) || ! EQ (tem1, Qnil))
    error ("Must specify *both* top and left corners");

  switch (window_prompting)
    {
    case USSize | USPosition:
      return window_prompting;
      break;

    case USSize:		/* Got the size, need the position. */
      window_prompting |= PPosition;
      return window_prompting;
      break;
	  
    case USPosition:		/* Got the position, need the size. */
      window_prompting |= PSize;
      return window_prompting;
      break;
	  
    case 0:			/* Got nothing, take both from geometry. */
      window_prompting |= PPosition | PSize;
      return window_prompting;
      break;
	  
    default:
      /* Somehow a bit got set in window_prompting that we didn't
	 put there.  */
      abort ();
    }
}

static void
x_window (s)
     struct screen *s;
{
  XSetWindowAttributes attributes;
  unsigned long attribute_mask;
  XClassHint class_hints;

  attributes.background_pixel = s->display.x->background_pixel;
  attributes.border_pixel = s->display.x->border_pixel;
  attributes.bit_gravity = StaticGravity;
  attributes.backing_store = NotUseful;
  attributes.save_under = True;
  attributes.event_mask = STANDARD_EVENT_SET;
  attribute_mask = (CWBackPixel | CWBorderPixel | CWBitGravity
#if 0
		    | CWBackingStore | CWSaveUnder
#endif
		    | CWEventMask);

  BLOCK_INPUT;
  s->display.x->window_desc
    = XCreateWindow (x_current_display, ROOT_WINDOW,
		     s->display.x->left_pos,
		     s->display.x->top_pos,
		     PIXEL_WIDTH (s), PIXEL_HEIGHT (s),
		     s->display.x->border_width,
		     CopyFromParent, /* depth */
		     InputOutput, /* class */
		     screen_visual, /* set in Fx_open_connection */
		     attribute_mask, &attributes);

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  class_hints.res_name = (char *) XSTRING (s->name)->data;
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  class_hints.res_class = EMACS_CLASS;
  XSetClassHint (x_current_display, s->display.x->window_desc, &class_hints);

  XDefineCursor (XDISPLAY s->display.x->window_desc,
		 s->display.x->text_cursor);
  UNBLOCK_INPUT;

  if (s->display.x->window_desc == 0)
    error ("Unable to create window.");
}

/* Handle the icon stuff for this window.  Perhaps later we might
   want an x_set_icon_position which can be called interactively as
   well. */

static void
x_icon (s, parms)
     struct screen *s;
     Lisp_Object parms;
{
  register Lisp_Object tem0,tem1;
  XWMHints hints;

  /* Set the position of the icon.  Note that twm groups all
     icons in an icon window. */
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  tem0 = x_get_arg (parms, intern ("icon-left"), 0, 0);
  tem1 = x_get_arg (parms, intern ("icon-top"), 0, 0);
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  if (!EQ (tem0, Qnil) && !EQ (tem1, Qnil))
    {
      CHECK_NUMBER (tem0, 0);
      CHECK_NUMBER (tem1, 0);
      hints.icon_x = XINT (tem0);
      hints.icon_x = XINT (tem0);
    }
  else if (!EQ (tem0, Qnil) || !EQ (tem1, Qnil))
    error ("Both left and top icon corners of icon must be specified");
  else
    {
      hints.icon_x = s->display.x->left_pos;
      hints.icon_y = s->display.x->top_pos;
    }

  /* Start up iconic or window? */
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  tem0 = x_get_arg (parms, intern ("iconic-startup"), 0, 0);
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  if (!EQ (tem0, Qnil))
    hints.initial_state = IconicState;
  else
    hints.initial_state = NormalState; /* the default, actually. */
  hints.input = False;

  BLOCK_INPUT;
  hints.flags = StateHint | IconPositionHint | InputHint;
  XSetWMHints (x_current_display, s->display.x->window_desc, &hints);
  UNBLOCK_INPUT;
}

/* Make the GC's needed for this window, setting the
   background, border and mouse colors; also create the
   mouse cursor and the gray border tile.  */

static void
x_make_gc (s)
     struct screen *s;
{
  XGCValues gc_values;
  GC temp_gc;
  XImage tileimage;
  static char cursor_bits[] =
    {
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

  /* Create the GC's of this screen.
     Note that many default values are used. */

  /* Normal video */
  gc_values.font = s->display.x->font->fid;
  gc_values.foreground = s->display.x->foreground_pixel;
  gc_values.background = s->display.x->background_pixel;
  gc_values.line_width = 0;	/* Means 1 using fast algorithm. */
  s->display.x->normal_gc = XCreateGC (x_current_display,
				       s->display.x->window_desc,
				       GCLineWidth | GCFont
				       | GCForeground | GCBackground,
				       &gc_values);

  /* Reverse video style. */
  gc_values.foreground = s->display.x->background_pixel;
  gc_values.background = s->display.x->foreground_pixel;
  s->display.x->reverse_gc = XCreateGC (x_current_display,
					s->display.x->window_desc,
					GCFont | GCForeground | GCBackground
					| GCLineWidth,
					&gc_values);

  /* Cursor has cursor-color background, background-color foreground. */
  gc_values.foreground = s->display.x->background_pixel;
  gc_values.background = s->display.x->cursor_pixel;
  gc_values.fill_style = FillOpaqueStippled;
  gc_values.stipple
    = XCreateBitmapFromData (x_current_display, ROOT_WINDOW,
			     cursor_bits, 16, 16);
  s->display.x->cursor_gc
    = XCreateGC (x_current_display, s->display.x->window_desc,
		 (GCFont | GCForeground | GCBackground
		  | GCFillStyle | GCStipple | GCLineWidth),
		 &gc_values);

  /* Create the gray border tile used when the pointer is not in
     the screen.  Since this depends on the screen's pixel values,
     this must be done on a per-screen basis. */
  s->display.x->border_tile =
    XCreatePixmap (x_current_display, ROOT_WINDOW, 16, 16,
		   DefaultDepth (x_current_display,
				 XDefaultScreen (x_current_display)));
  gc_values.foreground = s->display.x->foreground_pixel;
  gc_values.background = s->display.x->background_pixel;
  temp_gc = XCreateGC (x_current_display,
		       (Drawable) s->display.x->border_tile,
		       GCForeground | GCBackground, &gc_values);

  /* These are things that should be determined by the server, in
     Fx_open_connection */
  tileimage.height = 16;
  tileimage.width = 16;
  tileimage.xoffset = 0;
  tileimage.format = XYBitmap;
  tileimage.data = gray_bits;
  tileimage.byte_order = LSBFirst;
  tileimage.bitmap_unit = 8;
  tileimage.bitmap_bit_order = LSBFirst;
  tileimage.bitmap_pad = 8;
  tileimage.bytes_per_line = (16 + 7) >> 3;
  tileimage.depth = 1;
  XPutImage (x_current_display, s->display.x->border_tile, temp_gc,
	     &tileimage, 0, 0, 0, 0, 16, 16);
  XFreeGC (x_current_display, temp_gc);
}
#endif /* HAVE_X11 */

DEFUN ("x-create-screen", Fx_create_screen, Sx_create_screen,
       1, 1, 0,
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  "Make a new X window, which is called a \"screen\" in Emacs terms.\n\
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Return an Emacs screen object representing the X window.\n\
ALIST is an alist of screen parameters.\n\
If the parameters specify that the screen should not have a minibuffer,\n\
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and do not specify a specific minibuffer window to use,\n\
then `default-minibuffer-screen' must be a screen whose minibuffer can\n\
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be shared by the new screen.")
  (parms)
     Lisp_Object parms;
{
#ifdef HAVE_X11
  struct screen *s;
  Lisp_Object screen, tem;
  Lisp_Object name;
  int minibuffer_only = 0;
  long window_prompting = 0;
  int width, height;

  if (x_current_display == 0)
    error ("X windows are not in use or not initialized");

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  name = x_get_arg (parms, intern ("name"), "Title", string);
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  if (NILP (name))
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    name = build_string (x_id_name);
  if (XTYPE (name) != Lisp_String)
    error ("x-create-screen: name parameter must be a string");
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  tem = x_get_arg (parms, intern ("minibuffer"), 0, 0);
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  if (EQ (tem, intern ("none")))
    s = make_screen_without_minibuffer (Qnil);
  else if (EQ (tem, intern ("only")))
    {
      s = make_minibuffer_screen ();
      minibuffer_only = 1;
    }
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  else if (EQ (tem, Qnil) || EQ (tem, Qt))
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    s = make_screen (1);
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  else
    s = make_screen_without_minibuffer (tem);
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  /* Set the name; the functions to which we pass s expect the
     name to be set.  */
  XSET (s->name, Lisp_String, name);

  XSET (screen, Lisp_Screen, s);
  s->output_method = output_x_window;
  s->display.x = (struct x_display *) xmalloc (sizeof (struct x_display));
  bzero (s->display.x, sizeof (struct x_display));

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  /* Note that the screen has no physical cursor right now.  */
  s->phys_cursor_x = -1;

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  /* Extract the window parameters from the supplied values
     that are needed to determine window geometry.  */
  x_default_parameter (s, parms, "font",
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		       build_string ("9x15"), "font", string);
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  x_default_parameter (s, parms, "background-color",
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		      build_string ("white"), "background", string);
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  x_default_parameter (s, parms, "border-width",
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		      make_number (2), "BorderWidth", number);
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  /* This defaults to 2 in order to match XTerms.  */
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  x_default_parameter (s, parms, "internal-border-width",
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		      make_number (2), "InternalBorderWidth", number);
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  /* Also do the stuff which must be set before the window exists. */
  x_default_parameter (s, parms, "foreground-color",
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		       build_string ("black"), "foreground", string);
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  x_default_parameter (s, parms, "mouse-color",
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		      build_string ("black"), "mouse", string);
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  x_default_parameter (s, parms, "cursor-color",
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		      build_string ("black"), "cursor", string);
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  x_default_parameter (s, parms, "border-color",
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		      build_string ("black"), "border", string);
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  /* Need to do icon type, auto-raise, auto-lower. */

  s->display.x->parent_desc = ROOT_WINDOW;
  window_prompting = x_figure_window_size (s, parms);

  x_window (s);
  x_icon (s, parms);
  x_make_gc (s);

  /* Dimensions, especially s->height, must be done via change_screen_size.
     Change will not be effected unless different from the current
     s->height. */
  width = s->width;
  height = s->height;
  s->height = s->width = 0;
  change_screen_size (s, height, width, 1);
  BLOCK_INPUT;
  x_wm_set_size_hint (s, window_prompting);
  UNBLOCK_INPUT;

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  tem = x_get_arg (parms, intern ("unsplittable"), 0, 0);
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  s->no_split = minibuffer_only || EQ (tem, Qt);

  /* Now handle the rest of the parameters. */
  x_default_parameter (s, parms, "horizontal-scroll-bar",
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		       Qnil, "?HScrollBar", string);
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  x_default_parameter (s, parms, "vertical-scroll-bar",
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		       Qnil, "?VScrollBar", string);
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  /* Make the window appear on the screen and enable display.  */
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  if (!EQ (x_get_arg (parms, intern ("suppress-initial-map"), 0, 0), Qt))
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    x_make_screen_visible (s);

  return screen;
#else /* X10 */
  struct screen *s;
  Lisp_Object screen, tem;
  Lisp_Object name;
  int pixelwidth, pixelheight;
  Cursor cursor;
  int height, width;
  Window parent;
  Pixmap temp;
  int minibuffer_only = 0;
  Lisp_Object vscroll, hscroll;

  if (x_current_display == 0)
    error ("X windows are not in use or not initialized");

  name = Fassq (intern ("name"), parms);

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  tem = x_get_arg (parms, intern ("minibuffer"), 0, 0);
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