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/* Functions for the X window system.
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   Copyright (C) 1989, 1992, 1993 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"
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#include "frame.h"
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#include "window.h"
#include "buffer.h"
#include "dispextern.h"
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#include "keyboard.h"
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#include "blockinput.h"
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#ifdef HAVE_X_WINDOWS
extern void abort ();

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#ifndef VMS
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#include <X11/bitmaps/gray>
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#else
#include "[.bitmaps]gray.xbm"
#endif
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#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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/* 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;

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/* The screen being used.  */
static Screen *x_screen;

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

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

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

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

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

/* `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;

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

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/* Default size of an Emacs window.  */
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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;

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/* Evaluate this expression to rebuild the section of syms_of_xfns
   that initializes and staticpros the symbols declared below.  Note
   that Emacs 18 has a bug that keeps C-x C-e from being able to
   evaluate this expression.

(progn
  ;; Accumulate a list of the symbols we want to initialize from the
  ;; declarations at the top of the file.
  (goto-char (point-min))
  (search-forward "/\*&&& symbols declared here &&&*\/\n")
  (let (symbol-list)
    (while (looking-at "Lisp_Object \\(Q[a-z_]+\\)")
      (setq symbol-list
	    (cons (buffer-substring (match-beginning 1) (match-end 1))
		  symbol-list))
      (forward-line 1))
    (setq symbol-list (nreverse symbol-list))
    ;; Delete the section of syms_of_... where we initialize the symbols.
    (search-forward "\n  /\*&&& init symbols here &&&*\/\n")
    (let ((start (point)))
      (while (looking-at "^  Q")
	(forward-line 2))
      (kill-region start (point)))
    ;; Write a new symbol initialization section.
    (while symbol-list
      (insert (format "  %s = intern (\"" (car symbol-list)))
      (let ((start (point)))
	(insert (substring (car symbol-list) 1))
	(subst-char-in-region start (point) ?_ ?-))
      (insert (format "\");\n  staticpro (&%s);\n" (car symbol-list)))
      (setq symbol-list (cdr symbol-list)))))

  */        

/*&&& symbols declared here &&&*/
Lisp_Object Qauto_raise;
Lisp_Object Qauto_lower;
Lisp_Object Qbackground_color;
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Lisp_Object Qbar;
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Lisp_Object Qborder_color;
Lisp_Object Qborder_width;
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Lisp_Object Qbox;
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Lisp_Object Qcursor_color;
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Lisp_Object Qcursor_type;
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Lisp_Object Qfont;
Lisp_Object Qforeground_color;
Lisp_Object Qgeometry;
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Lisp_Object Qicon;
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Lisp_Object Qicon_left;
Lisp_Object Qicon_top;
Lisp_Object Qicon_type;
Lisp_Object Qinternal_border_width;
Lisp_Object Qleft;
Lisp_Object Qmouse_color;
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Lisp_Object Qnone;
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Lisp_Object Qparent_id;
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Lisp_Object Qsuppress_icon;
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Lisp_Object Qtop;
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Lisp_Object Qundefined_color;
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Lisp_Object Qvertical_scroll_bars;
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Lisp_Object Qvisibility;
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Lisp_Object Qwindow_id;
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Lisp_Object Qx_frame_parameter;
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/* The below are defined in frame.c. */
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extern Lisp_Object Qheight, Qminibuffer, Qname, Qonly, Qwidth;
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extern Lisp_Object Qunsplittable, Qmenu_bar_lines, Qicon;
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extern Lisp_Object Vwindow_system_version;

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


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/* Error if we are not connected to X.  */
static void
check_x ()
{
  if (x_current_display == 0)
    error ("X windows are not in use or not initialized");
}

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/* Return the Emacs frame-object corresponding to an X window.
   It could be the frame's main window or an icon window.  */
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/* This function can be called during GC, so use XGCTYPE.  */

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struct frame *
x_window_to_frame (wdesc)
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     int wdesc;
{
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  Lisp_Object tail, frame;
  struct frame *f;
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  for (tail = Vframe_list; XGCTYPE (tail) == Lisp_Cons;
       tail = XCONS (tail)->cdr)
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    {
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      frame = XCONS (tail)->car;
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      if (XGCTYPE (frame) != Lisp_Frame)
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        continue;
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      f = XFRAME (frame);
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      if (FRAME_X_WINDOW (f) == wdesc
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          || f->display.x->icon_desc == wdesc)
        return f;
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    }
  return 0;
}


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/* Connect the frame-parameter names for X frames
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   to the ways of passing the parameter values to the window system.

   The name of a parameter, as a Lisp symbol,
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   has an `x-frame-parameter' property which is an integer in Lisp
   but can be interpreted as an `enum x_frame_parm' in C.  */
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enum x_frame_parm
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{
  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,
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  X_PARM_VERT_SCROLL_BAR,
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  X_PARM_VISIBILITY,
  X_PARM_MENU_BAR_LINES
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};


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

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 ();
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void x_set_cursor_type ();
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void x_set_icon_type ();
void x_set_font ();
void x_set_border_width ();
void x_set_internal_border_width ();
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void x_explicitly_set_name ();
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void x_set_autoraise ();
void x_set_autolower ();
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void x_set_vertical_scroll_bars ();
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void x_set_visibility ();
void x_set_menu_bar_lines ();
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static struct x_frame_parm_table x_frame_parms[] =
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{
  "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,
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  "cursor-type", x_set_cursor_type,
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  "icon-type", x_set_icon_type,
  "font", x_set_font,
  "border-width", x_set_border_width,
  "internal-border-width", x_set_internal_border_width,
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  "name", x_explicitly_set_name,
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  "auto-raise", x_set_autoraise,
  "auto-lower", x_set_autolower,
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  "vertical-scroll-bars", x_set_vertical_scroll_bars,
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  "visibility", x_set_visibility,
  "menu-bar-lines", x_set_menu_bar_lines,
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};

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

init_x_parm_symbols ()
{
  int i;

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  for (i = 0; i < sizeof (x_frame_parms) / sizeof (x_frame_parms[0]); i++)
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    Fput (intern (x_frame_parms[i].name), Qx_frame_parameter,
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	  make_number (i));
}

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/* Change the parameters of FRAME as specified by ALIST.
   If a parameter is not specially recognized, do nothing;
   otherwise call the `x_set_...' function for that parameter.  */
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void
x_set_frame_parameters (f, alist)
     FRAME_PTR f;
     Lisp_Object alist;
{
  Lisp_Object tail;

  /* If both of these parameters are present, it's more efficient to
     set them both at once.  So we wait until we've looked at the
     entire list before we set them.  */
  Lisp_Object width, height;

  /* Same here.  */
  Lisp_Object left, top;
  
  XSET (width,  Lisp_Int, FRAME_WIDTH  (f));
  XSET (height, Lisp_Int, FRAME_HEIGHT (f));

  XSET (top, Lisp_Int, f->display.x->top_pos);
  XSET (left, Lisp_Int, f->display.x->left_pos);

  for (tail = alist; CONSP (tail); tail = Fcdr (tail))
    {
      Lisp_Object elt, prop, val;

      elt = Fcar (tail);
      prop = Fcar (elt);
      val = Fcdr (elt);

      if (EQ (prop, Qwidth))
	width = val;
      else if (EQ (prop, Qheight))
	height = val;
      else if (EQ (prop, Qtop))
	top = val;
      else if (EQ (prop, Qleft))
	left = val;
      else
	{
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	  register Lisp_Object param_index = Fget (prop, Qx_frame_parameter);
	  register Lisp_Object old_value = get_frame_param (f, prop);

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	  store_frame_param (f, prop, val);
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	  if (XTYPE (param_index) == Lisp_Int
	      && XINT (param_index) >= 0
	      && (XINT (param_index)
		  < sizeof (x_frame_parms)/sizeof (x_frame_parms[0])))
	    (*x_frame_parms[XINT (param_index)].setter)(f, val, old_value);
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	}
    }

  /* Don't call these unless they've changed; the window may not actually
     exist yet.  */
  {
    Lisp_Object frame;

    XSET (frame, Lisp_Frame, f);
    if (XINT (width) != FRAME_WIDTH (f)
	|| XINT (height) != FRAME_HEIGHT (f))
      Fset_frame_size (frame, width, height);
    if (XINT (left) != f->display.x->left_pos
	|| XINT (top) != f->display.x->top_pos)
      Fset_frame_position (frame, left, top);
  }
}
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/* Insert a description of internally-recorded parameters of frame X
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   into the parameter alist *ALISTPTR that is to be given to the user.
   Only parameters that are specific to the X window system
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   and whose values are not correctly recorded in the frame's
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   param_alist need to be considered here.  */

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x_report_frame_params (f, alistptr)
     struct frame *f;
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     Lisp_Object *alistptr;
{
  char buf[16];

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  store_in_alist (alistptr, Qleft, make_number (f->display.x->left_pos));
  store_in_alist (alistptr, Qtop, make_number (f->display.x->top_pos));
  store_in_alist (alistptr, Qborder_width,
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       	   make_number (f->display.x->border_width));
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  store_in_alist (alistptr, Qinternal_border_width,
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       	   make_number (f->display.x->internal_border_width));
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  sprintf (buf, "%d", FRAME_X_WINDOW (f));
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  store_in_alist (alistptr, Qwindow_id,
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       	   build_string (buf));
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  store_in_alist (alistptr, Qvisibility,
		  (FRAME_VISIBLE_P (f) ? Qt
		   : FRAME_ICONIFIED_P (f) ? Qicon : Qnil));
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}

/* Decide if color named COLOR is valid for the display
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   associated with the selected frame. */
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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
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   suitable for screen F.
   If F is not a color screen, return DEF (default) regardless of what
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   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 (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));
}

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/* Functions called only from `x_set_frame_param'
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   to set individual parameters.

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   If FRAME_X_WINDOW (f) is 0,
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   the frame is being created and its X-window does not exist yet.
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   In that case, just record the parameter's new value
   in the standard place; do not attempt to change the window.  */

void
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x_set_foreground_color (f, arg, oldval)
     struct frame *f;
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     Lisp_Object arg, oldval;
{
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  f->display.x->foreground_pixel = x_decode_color (arg, BLACK_PIX_DEFAULT);
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  if (FRAME_X_WINDOW (f) != 0)
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    {
#ifdef HAVE_X11
      BLOCK_INPUT;
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      XSetForeground (x_current_display, f->display.x->normal_gc,
		      f->display.x->foreground_pixel);
      XSetBackground (x_current_display, f->display.x->reverse_gc,
		      f->display.x->foreground_pixel);
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      UNBLOCK_INPUT;
#endif				/* HAVE_X11 */
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      recompute_basic_faces (f);
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      if (FRAME_VISIBLE_P (f))
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        redraw_frame (f);
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    }
}

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

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  f->display.x->background_pixel = x_decode_color (arg, WHITE_PIX_DEFAULT);
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  if (FRAME_X_WINDOW (f) != 0)
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    {
      BLOCK_INPUT;
#ifdef HAVE_X11
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      /* The main frame area. */
      XSetBackground (x_current_display, f->display.x->normal_gc,
		      f->display.x->background_pixel);
      XSetForeground (x_current_display, f->display.x->reverse_gc,
		      f->display.x->background_pixel);
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      XSetWindowBackground (x_current_display, FRAME_X_WINDOW (f),
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			    f->display.x->background_pixel);
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#else
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      temp = XMakeTile (f->display.x->background_pixel);
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      XChangeBackground (FRAME_X_WINDOW (f), temp);
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      XFreePixmap (temp);
#endif				/* not HAVE_X11 */
      UNBLOCK_INPUT;

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      recompute_basic_faces (f);

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      if (FRAME_VISIBLE_P (f))
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        redraw_frame (f);
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    }
}

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

  if (!EQ (Qnil, arg))
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    f->display.x->mouse_pixel = x_decode_color (arg, BLACK_PIX_DEFAULT);
  mask_color = f->display.x->background_pixel;
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				/* No invisible pointers. */
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  if (mask_color == f->display.x->mouse_pixel
	&& mask_color == f->display.x->background_pixel)
    f->display.x->mouse_pixel = f->display.x->foreground_pixel;
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  BLOCK_INPUT;
#ifdef HAVE_X11
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  /* It's not okay to crash if the user selects a screwey cursor.  */
  x_catch_errors ();

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  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);
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  x_check_errors ("bad text pointer cursor: %s");
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  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);
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  x_check_errors ("bad nontext pointer cursor: %s");
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  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);

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  /* Check and report errors with the above calls.  */
  x_check_errors ("can't set cursor shape: %s");
  x_uncatch_errors ();

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  {
    XColor fore_color, back_color;

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    fore_color.pixel = f->display.x->mouse_pixel;
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    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,
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			  f->display.x->mouse_pixel,
			  f->display.x->background_pixel,
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			  GXcopy);
#endif /* X10 */

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  if (FRAME_X_WINDOW (f) != 0)
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    {
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      XDefineCursor (XDISPLAY FRAME_X_WINDOW (f), cursor);
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    }

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

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

  XFlushQueue ();
  UNBLOCK_INPUT;
}

void
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x_set_cursor_color (f, arg, oldval)
     struct frame *f;
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     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
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    fore_pixel = f->display.x->background_pixel;
  f->display.x->cursor_pixel = x_decode_color (arg, BLACK_PIX_DEFAULT);
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  /* Make sure that the cursor color differs from the background color.  */
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  if (f->display.x->cursor_pixel == f->display.x->background_pixel)
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    {
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      f->display.x->cursor_pixel == f->display.x->mouse_pixel;
      if (f->display.x->cursor_pixel == fore_pixel)
	fore_pixel = f->display.x->background_pixel;
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    }
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  f->display.x->cursor_foreground_pixel = fore_pixel;
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  if (FRAME_X_WINDOW (f) != 0)
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    {
#ifdef HAVE_X11
      BLOCK_INPUT;
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      XSetBackground (x_current_display, f->display.x->cursor_gc,
		      f->display.x->cursor_pixel);
      XSetForeground (x_current_display, f->display.x->cursor_gc,
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		      fore_pixel);
      UNBLOCK_INPUT;
#endif /* HAVE_X11 */

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      if (FRAME_VISIBLE_P (f))
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	{
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	  x_display_cursor (f, 0);
	  x_display_cursor (f, 1);
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	}
    }
}

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/* Set the border-color of frame F to value described by ARG.
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   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
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   F has an x-window; it must be redone when the window is created.
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   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
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x_set_border_color (f, arg, oldval)
     struct frame *f;
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     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);

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  x_set_border_pixel (f, pix);
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}

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/* Set the border-color of frame F to pixel value PIX.
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   Note that this does not fully take effect if done before
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   F has an x-window.  */
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x_set_border_pixel (f, pix)
     struct frame *f;
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     int pix;
{
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  f->display.x->border_pixel = pix;
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  if (FRAME_X_WINDOW (f) != 0 && f->display.x->border_width > 0)
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    {
      Pixmap temp;
      int mask;

      BLOCK_INPUT;
#ifdef HAVE_X11
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      XSetWindowBorder (x_current_display, FRAME_X_WINDOW (f),
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       		 pix);
#else
      if (pix < 0)
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        temp = XMakePixmap ((Bitmap) XStoreBitmap (gray_width, gray_height,
						   gray_bits),
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       		     BLACK_PIX_DEFAULT, WHITE_PIX_DEFAULT);
      else
        temp = XMakeTile (pix);
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      XChangeBorder (FRAME_X_WINDOW (f), temp);
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      XFreePixmap (XDISPLAY temp);
#endif /* not HAVE_X11 */
      UNBLOCK_INPUT;

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      if (FRAME_VISIBLE_P (f))
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        redraw_frame (f);
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    }
}

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void
x_set_cursor_type (f, arg, oldval)
     FRAME_PTR f;
     Lisp_Object arg, oldval;
{
  if (EQ (arg, Qbar))
    FRAME_DESIRED_CURSOR (f) = bar_cursor;
  else if (EQ (arg, Qbox))
    FRAME_DESIRED_CURSOR (f) = filled_box_cursor;
  else
    error
      ("the `cursor-type' frame parameter should be either `bar' or `box'");

  /* Make sure the cursor gets redrawn.  This is overkill, but how
     often do people change cursor types?  */
  update_mode_lines++;
}

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void
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x_set_icon_type (f, arg, oldval)
     struct frame *f;
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     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 (f, 0);
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  else
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    result = x_bitmap_icon (f);
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  if (result)
    {
      UNBLOCK_INPUT;
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      error ("No icon window available.");
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    }

  /* If the window was unmapped (and its icon was mapped),
     the new icon is not mapped, so map the window in its stead.  */
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  if (FRAME_VISIBLE_P (f))
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    XMapWindow (XDISPLAY FRAME_X_WINDOW (f));
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  XFlushQueue ();
  UNBLOCK_INPUT;
}

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extern Lisp_Object x_new_font ();

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void
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x_set_font (f, arg, oldval)
     struct frame *f;
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     Lisp_Object arg, oldval;
{
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  Lisp_Object result;
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  CHECK_STRING (arg, 1);

  BLOCK_INPUT;
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  result = x_new_font (f, XSTRING (arg)->data);
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  UNBLOCK_INPUT;
  
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  if (EQ (result, Qnil))
    error ("Font \"%s\" is not defined", XSTRING (arg)->data);
  else if (EQ (result, Qt))
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    error ("the characters of the given font have varying widths");
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  else if (STRINGP (result))
    {
      recompute_basic_faces (f);
      store_frame_param (f, Qfont, result);
    }
  else
    abort ();
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}

void
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x_set_border_width (f, arg, oldval)
     struct frame *f;
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     Lisp_Object arg, oldval;
{
  CHECK_NUMBER (arg, 0);

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

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  if (FRAME_X_WINDOW (f) != 0)
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    error ("Cannot change the border width of a window");

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

void
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x_set_internal_border_width (f, arg, oldval)
     struct frame *f;
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     Lisp_Object arg, oldval;
{
  int mask;
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  int old = f->display.x->internal_border_width;
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  CHECK_NUMBER (arg, 0);
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  f->display.x->internal_border_width = XINT (arg);
  if (f->display.x->internal_border_width < 0)
    f->display.x->internal_border_width = 0;
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  if (f->display.x->internal_border_width == old)
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    return;

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  if (FRAME_X_WINDOW (f) != 0)
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    {
      BLOCK_INPUT;
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      x_set_window_size (f, f->width, f->height);
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#if 0
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      x_set_resize_hint (f);
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#endif
      XFlushQueue ();
      UNBLOCK_INPUT;
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      SET_FRAME_GARBAGED (f);
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    }
}

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void
x_set_visibility (f, value, oldval)
     struct frame *f;
     Lisp_Object value, oldval;
{
  Lisp_Object frame;
  XSET (frame, Lisp_Frame, f);

  if (NILP (value))
    Fmake_frame_invisible (frame);
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  else if (EQ (value, Qicon))
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    Ficonify_frame (frame);
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  else
    Fmake_frame_visible (frame);
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}

static void
x_set_menu_bar_lines_1 (window, n)
  Lisp_Object window;
  int n;
{
  for (; !NILP (window); window = XWINDOW (window)->next)
    {
      struct window *w = XWINDOW (window);

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      XFASTINT (w->top) += n;
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      if (!NILP (w->vchild))
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	x_set_menu_bar_lines_1 (w->vchild, n);
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      if (!NILP (w->hchild))
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	x_set_menu_bar_lines_1 (w->hchild, n);
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    }
}

void
x_set_menu_bar_lines (f, value, oldval)
     struct frame *f;
     Lisp_Object value, oldval;
{
  int nlines;
  int olines = FRAME_MENU_BAR_LINES (f);

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  /* Right now, menu bars don't work properly in minibuf-only frames;
     most of the commands try to apply themselves to the minibuffer
     frame itslef, and get an error because you can't switch buffers
     in or split the minibuffer window.  */
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  if (FRAME_MINIBUF_ONLY_P (f))
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    return;

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  if (XTYPE (value) == Lisp_Int)
    nlines = XINT (value);
  else
    nlines = 0;

  FRAME_MENU_BAR_LINES (f) = nlines;
  x_set_menu_bar_lines_1 (f->root_window, nlines - olines);
  x_set_window_size (f, FRAME_WIDTH (f),
		     FRAME_HEIGHT (f) + nlines - olines);
}

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/* Change the name of frame F to ARG.  If ARG is nil, set F's name to
       x_id_name.

   If EXPLICIT is non-zero, that indicates that lisp code is setting the
       name; if ARG is a string, set F's name to ARG and set
       F->explicit_name; if ARG is Qnil, then clear F->explicit_name.

   If EXPLICIT is zero, that indicates that Emacs redisplay code is
       suggesting a new name, which lisp code should override; if
       F->explicit_name is set, ignore the new name; otherwise, set it.  */

void
x_set_name (f, name, explicit)
     struct frame *f;
     Lisp_Object name;
     int explicit;
{
  /* Make sure that requests from lisp code override requests from 
     Emacs redisplay code.  */
  if (explicit)
    {
      /* If we're switching from explicit to implicit, we had better
	 update the mode lines and thereby update the title.  */
      if (f->explicit_name && NILP (name))
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	update_mode_lines = 1;
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      f->explicit_name = ! NILP (name);
    }
  else if (f->explicit_name)
    return;

  /* If NAME is nil, set the name to the x_id_name.  */
  if (NILP (name))
    name = build_string (x_id_name);
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  else
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    CHECK_STRING (name, 0);
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  /* Don't change the name if it's already NAME.  */
  if (! NILP (Fstring_equal (name, f->name)))
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    return;

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  if (FRAME_X_WINDOW (f))
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    {
      BLOCK_INPUT;
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#ifdef HAVE_X11R4
      {
	XTextProperty text;
	text.value = XSTRING (name)->data;
	text.encoding = XA_STRING;
	text.format = 8;
	text.nitems = XSTRING (name)->size;
	XSetWMName (x_current_display, FRAME_X_WINDOW (f), &text);
	XSetWMIconName (x_current_display, FRAME_X_WINDOW (f), &text);
      }
#else
      XSetIconName (XDISPLAY FRAME_X_WINDOW (f),
		    XSTRING (name)->data);
      XStoreName (XDISPLAY FRAME_X_WINDOW (f),
		  XSTRING (name)->data);
#endif

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      UNBLOCK_INPUT;
    }
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  f->name = name;
}

/* This function should be called when the user's lisp code has
   specified a name for the frame; the name will override any set by the
   redisplay code.  */
void
x_explicitly_set_name (f, arg, oldval)
     FRAME_PTR f;
     Lisp_Object arg, oldval;
{
  x_set_name (f, arg, 1);
}

/* This function should be called by Emacs redisplay code to set the
   name; names set this way will never override names set by the user's
   lisp code.  */
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void
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x_implicitly_set_name (f, arg, oldval)
     FRAME_PTR f;
     Lisp_Object arg, oldval;
{
  x_set_name (f, arg, 0);
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}

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

void
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x_set_autolower (f, arg, oldval)
     struct frame *f;
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     Lisp_Object arg, oldval;
{
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  f->auto_lower = !EQ (Qnil, arg);
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}
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void
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x_set_vertical_scroll_bars (f, arg, oldval)
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     struct frame *f;
     Lisp_Object arg, oldval;
{
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  if (NILP (arg) != ! FRAME_HAS_VERTICAL_SCROLL_BARS (f))
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    {
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      FRAME_HAS_VERTICAL_SCROLL_BARS (f) = ! NILP (arg);
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      /* We set this parameter before creating the X window for the
	 frame, so we can get the geometry right from the start.
	 However, if the window hasn't been created yet, we shouldn't
	 call x_set_window_size.  */
      if (FRAME_X_WINDOW (f))
	x_set_window_size (f, FRAME_WIDTH (f), FRAME_HEIGHT (f));
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    }
}
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/* Subroutines of creating an X frame.  */
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#ifdef HAVE_X11
extern char *x_get_string_resource ();
extern XrmDatabase x_load_resources ();

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DEFUN ("x-get-resource", Fx_get_resource, Sx_get_resource, 2, 4, 0,
  "Return the value of ATTRIBUTE, of class CLASS, from the X defaults database.\n\
This uses `INSTANCE.ATTRIBUTE' as the key and `Emacs.CLASS' as the\n\
class, where INSTANCE is the name under which Emacs was invoked.\n\
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\n\
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The optional arguments COMPONENT and SUBCLASS add to the key and the\n\
class, respectively.  You must specify both of them or neither.\n\
If you specify them, the key is `INSTANCE.COMPONENT.ATTRIBUTE'\n\
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and the class is `Emacs.CLASS.SUBCLASS'.")
  (attribute, class, component, subclass)
     Lisp_Object attribute, class, component, subclass;
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{
  register char *value;
  char *name_key;
  char *class_key;

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  check_x ();

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  CHECK_STRING (attribute, 0);
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  CHECK_STRING (class, 0);

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  if (!NILP (component))
    CHECK_STRING (component, 1);
  if (!NILP (subclass))
    CHECK_STRING (subclass, 2);
  if (NILP (component) != NILP (subclass))
    error ("x-get-resource: must specify both COMPONENT and SUBCLASS or neither");

  if (NILP (component))
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    {
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      /* Allocate space for the components, the dots which separate them,
	 and the final '\0'.  */
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      name_key = (char *) alloca (XSTRING (Vinvocation_name)->size
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				  + XSTRING (attribute)->size
				  + 2);
      class_key = (char *) alloca ((sizeof (EMACS_CLASS) - 1)
				   + XSTRING (class)->size
				   + 2);
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      sprintf (name_key, "%s.%s",
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	       XSTRING (Vinvocation_name)->data,
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	       XSTRING (attribute)->data);
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      sprintf (class_key, "%s.%s",
	       EMACS_CLASS,
	       XSTRING (class)->data);
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    }
  else
    {
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      name_key = (char *) alloca (XSTRING (Vinvocation_name)->size
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				  + XSTRING (component)->size
				  + XSTRING (attribute)->size
				  + 3);
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      class_key = (char *) alloca ((sizeof (EMACS_CLASS) - 1)
				   + XSTRING (class)->size
				   + XSTRING (subclass)->size
				   + 3);
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      sprintf (name_key, "%s.%s.%s",
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	       XSTRING (Vinvocation_name)->data,
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	       XSTRING (component)->data,
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	       XSTRING (attribute)->data);