xfns.c

/* Functions for the X window system.
   Copyright (C) 1989, 92, 93, 94, 95, 96, 1997, 1998, 1999
     Free Software Foundation.

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
the Free Software Foundation; either version 2, or (at your option)
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, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Image support (XBM, XPM, PBM, JPEG, TIFF, GIF, PNG, GS). tooltips,
   tool-bars, busy-cursor, file selection dialog added by Gerd
   Moellmann <gerd@gnu.org>.  */

/* Completely rewritten by Richard Stallman.  */

/* Rewritten for X11 by Joseph Arceneaux */

#include <config.h>
#include <signal.h>
#include <stdio.h>
#include <math.h>

/* This makes the fields of a Display accessible, in Xlib header files.  */

#define XLIB_ILLEGAL_ACCESS

#include "lisp.h"
#include "xterm.h"
#include "frame.h"
#include "window.h"
#include "buffer.h"
#include "dispextern.h"
#include "keyboard.h"
#include "blockinput.h"
#include <epaths.h>
#include "charset.h"
#include "fontset.h"
#include "systime.h"
#include "termhooks.h"

#ifdef HAVE_X_WINDOWS

#include <ctype.h>

/* On some systems, the character-composition stuff is broken in X11R5.  */

#if defined (HAVE_X11R5) && ! defined (HAVE_X11R6)
#ifdef X11R5_INHIBIT_I18N
#define X_I18N_INHIBITED
#endif
#endif

#ifndef VMS
#if 1 /* Used to be #ifdef EMACS_BITMAP_FILES, but this should always work.  */
#include "bitmaps/gray.xbm"
#else
#include <X11/bitmaps/gray>
#endif
#else
#include "[.bitmaps]gray.xbm"
#endif

#ifdef USE_X_TOOLKIT
#include <X11/Shell.h>

#ifndef USE_MOTIF
#include <X11/Xaw/Paned.h>
#include <X11/Xaw/Label.h>
#endif /* USE_MOTIF */

#ifdef USG
#undef USG	/* ####KLUDGE for Solaris 2.2 and up */
#include <X11/Xos.h>
#define USG
#else
#include <X11/Xos.h>
#endif

#include "widget.h"

#include "../lwlib/lwlib.h"

#ifdef USE_MOTIF
#include <Xm/Xm.h>
#include <Xm/DialogS.h>
#include <Xm/FileSB.h>
#endif

/* Do the EDITRES protocol if running X11R5
   Exception: HP-UX (at least version A.09.05) has X11R5 without EditRes */

#if (XtSpecificationRelease >= 5) && !defined(NO_EDITRES)
#define HACK_EDITRES
extern void _XEditResCheckMessages ();
#endif /* R5 + Athena */

/* Unique id counter for widgets created by the Lucid Widget Library.  */

extern LWLIB_ID widget_id_tick;

#ifdef USE_LUCID
/* This is part of a kludge--see lwlib/xlwmenu.c.  */
extern XFontStruct *xlwmenu_default_font;
#endif

extern void free_frame_menubar ();
extern double atof ();

#endif /* USE_X_TOOLKIT */

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

#ifdef HAVE_X11R4
#define MAXREQUEST(dpy) (XMaxRequestSize (dpy))
#else
#define MAXREQUEST(dpy) ((dpy)->max_request_size)
#endif

/* The gray bitmap `bitmaps/gray'.  This is done because xterm.c uses
   it, and including `bitmaps/gray' more than once is a problem when
   config.h defines `static' as an empty replacement string.  */

int gray_bitmap_width = gray_width;
int gray_bitmap_height = gray_height;
unsigned char *gray_bitmap_bits = gray_bits;

/* The name we're using in resource queries.  Most often "emacs".  */

Lisp_Object Vx_resource_name;

/* The application class we're using in resource queries.
   Normally "Emacs".  */

Lisp_Object Vx_resource_class;

/* Non-zero means we're allowed to display a busy cursor.  */

int display_busy_cursor_p;

/* 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;
Lisp_Object Vx_busy_pointer_shape;

/* The shape when over mouse-sensitive text.  */

Lisp_Object Vx_sensitive_text_pointer_shape;

/* Color of chars displayed in cursor box.  */

Lisp_Object Vx_cursor_fore_pixel;

/* Nonzero if using X.  */

static int x_in_use;

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

Lisp_Object Vx_no_window_manager;

/* Search path for bitmap files.  */

Lisp_Object Vx_bitmap_file_path;

/* Regexp matching a font name whose width is the same as `PIXEL_SIZE'.  */

Lisp_Object Vx_pixel_size_width_font_regexp;

/* 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 Qbar;
Lisp_Object Qborder_color;
Lisp_Object Qborder_width;
Lisp_Object Qbox;
Lisp_Object Qcursor_color;
Lisp_Object Qcursor_type;
Lisp_Object Qgeometry;
Lisp_Object Qicon_left;
Lisp_Object Qicon_top;
Lisp_Object Qicon_type;
Lisp_Object Qicon_name;
Lisp_Object Qinternal_border_width;
Lisp_Object Qleft;
Lisp_Object Qright;
Lisp_Object Qmouse_color;
Lisp_Object Qnone;
Lisp_Object Qouter_window_id;
Lisp_Object Qparent_id;
Lisp_Object Qscroll_bar_width;
Lisp_Object Qsuppress_icon;
extern Lisp_Object Qtop;
Lisp_Object Qundefined_color;
Lisp_Object Qvertical_scroll_bars;
Lisp_Object Qvisibility;
Lisp_Object Qwindow_id;
Lisp_Object Qx_frame_parameter;
Lisp_Object Qx_resource_name;
Lisp_Object Quser_position;
Lisp_Object Quser_size;
Lisp_Object Qdisplay;
Lisp_Object Qscroll_bar_foreground, Qscroll_bar_background;
Lisp_Object Qscreen_gamma;

/* The below are defined in frame.c.  */

extern Lisp_Object Qheight, Qminibuffer, Qname, Qonly, Qwidth;
extern Lisp_Object Qunsplittable, Qmenu_bar_lines, Qbuffer_predicate, Qtitle;
extern Lisp_Object Qtool_bar_lines;

extern Lisp_Object Vwindow_system_version;

Lisp_Object Qface_set_after_frame_default;


/* Error if we are not connected to X.  */

void
check_x ()
{
  if (! x_in_use)
    error ("X windows are not in use or not initialized");
}

/* Nonzero if we can use mouse menus.
   You should not call this unless HAVE_MENUS is defined.  */

int
have_menus_p ()
{
  return x_in_use;
}

/* Extract a frame as a FRAME_PTR, defaulting to the selected frame
   and checking validity for X.  */

FRAME_PTR
check_x_frame (frame)
     Lisp_Object frame;
{
  FRAME_PTR f;

  if (NILP (frame))
    frame = selected_frame;
  CHECK_LIVE_FRAME (frame, 0);
  f = XFRAME (frame);
  if (! FRAME_X_P (f))
    error ("Non-X frame used");
  return f;
}

/* Let the user specify an X display with a frame.
   nil stands for the selected frame--or, if that is not an X frame,
   the first X display on the list.  */

static struct x_display_info *
check_x_display_info (frame)
     Lisp_Object frame;
{
  if (NILP (frame))
    {
      struct frame *sf = XFRAME (selected_frame);
      
      if (FRAME_X_P (sf) && FRAME_LIVE_P (sf))
	return FRAME_X_DISPLAY_INFO (sf);
      else if (x_display_list != 0)
	return x_display_list;
      else
	error ("X windows are not in use or not initialized");
    }
  else if (STRINGP (frame))
    return x_display_info_for_name (frame);
  else
    {
      FRAME_PTR f;

      CHECK_LIVE_FRAME (frame, 0);
      f = XFRAME (frame);
      if (! FRAME_X_P (f))
	error ("Non-X frame used");
      return FRAME_X_DISPLAY_INFO (f);
    }
}


/* Return the Emacs frame-object corresponding to an X window.
   It could be the frame's main window or an icon window.  */

/* This function can be called during GC, so use GC_xxx type test macros.  */

struct frame *
x_window_to_frame (dpyinfo, wdesc)
     struct x_display_info *dpyinfo;
     int wdesc;
{
  Lisp_Object tail, frame;
  struct frame *f;

  for (tail = Vframe_list; GC_CONSP (tail); tail = XCDR (tail))
    {
      frame = XCAR (tail);
      if (!GC_FRAMEP (frame))
        continue;
      f = XFRAME (frame);
      if (f->output_data.nothing == 1 || FRAME_X_DISPLAY_INFO (f) != dpyinfo)
	continue;
#ifdef USE_X_TOOLKIT
      if ((f->output_data.x->edit_widget 
	   && XtWindow (f->output_data.x->edit_widget) == wdesc)
	  /* A tooltip frame?  */
	  || (!f->output_data.x->edit_widget
	      && FRAME_X_WINDOW (f) == wdesc)
          || f->output_data.x->icon_desc == wdesc)
        return f;
#else /* not USE_X_TOOLKIT */
      if (FRAME_X_WINDOW (f) == wdesc
          || f->output_data.x->icon_desc == wdesc)
        return f;
#endif /* not USE_X_TOOLKIT */
    }
  return 0;
}

#ifdef USE_X_TOOLKIT
/* Like x_window_to_frame but also compares the window with the widget's
   windows.  */

struct frame *
x_any_window_to_frame (dpyinfo, wdesc)
     struct x_display_info *dpyinfo;
     int wdesc;
{
  Lisp_Object tail, frame;
  struct frame *f;
  struct x_output *x;

  for (tail = Vframe_list; GC_CONSP (tail); tail = XCDR (tail))
    {
      frame = XCAR (tail);
      if (!GC_FRAMEP (frame))
        continue;
      f = XFRAME (frame);
      if (f->output_data.nothing == 1 || FRAME_X_DISPLAY_INFO (f) != dpyinfo)
	continue;
      x = f->output_data.x;
      /* This frame matches if the window is any of its widgets.  */
      if (x->widget)
	{
	  if (wdesc == XtWindow (x->widget) 
	      || wdesc == XtWindow (x->column_widget) 
	      || wdesc == XtWindow (x->edit_widget))
	    return f;
	  /* Match if the window is this frame's menubar.  */
	  if (lw_window_is_in_menubar (wdesc, x->menubar_widget))
	    return f;
	}
      else if (FRAME_X_WINDOW (f) == wdesc)
	/* A tooltip frame.  */
	return f;
    }
  return 0;
}

/* Likewise, but exclude the menu bar widget.  */

struct frame *
x_non_menubar_window_to_frame (dpyinfo, wdesc)
     struct x_display_info *dpyinfo;
     int wdesc;
{
  Lisp_Object tail, frame;
  struct frame *f;
  struct x_output *x;

  for (tail = Vframe_list; GC_CONSP (tail); tail = XCDR (tail))
    {
      frame = XCAR (tail);
      if (!GC_FRAMEP (frame))
        continue;
      f = XFRAME (frame);
      if (f->output_data.nothing == 1 || FRAME_X_DISPLAY_INFO (f) != dpyinfo)
	continue;
      x = f->output_data.x;
      /* This frame matches if the window is any of its widgets.  */
      if (x->widget)
	{
	  if (wdesc == XtWindow (x->widget) 
	      || wdesc == XtWindow (x->column_widget) 
	      || wdesc == XtWindow (x->edit_widget))
	    return f;
	}
      else if (FRAME_X_WINDOW (f) == wdesc)
	/* A tooltip frame.  */
	return f;
    }
  return 0;
}

/* Likewise, but consider only the menu bar widget.  */

struct frame *
x_menubar_window_to_frame (dpyinfo, wdesc)
     struct x_display_info *dpyinfo;
     int wdesc;
{
  Lisp_Object tail, frame;
  struct frame *f;
  struct x_output *x;

  for (tail = Vframe_list; GC_CONSP (tail); tail = XCDR (tail))
    {
      frame = XCAR (tail);
      if (!GC_FRAMEP (frame))
        continue;
      f = XFRAME (frame);
      if (f->output_data.nothing == 1 || FRAME_X_DISPLAY_INFO (f) != dpyinfo)
	continue;
      x = f->output_data.x;
      /* Match if the window is this frame's menubar.  */
      if (x->menubar_widget
	  && lw_window_is_in_menubar (wdesc, x->menubar_widget))
	return f;
    }
  return 0;
}

/* Return the frame whose principal (outermost) window is WDESC.
   If WDESC is some other (smaller) window, we return 0.  */

struct frame *
x_top_window_to_frame (dpyinfo, wdesc)
     struct x_display_info *dpyinfo;
     int wdesc;
{
  Lisp_Object tail, frame;
  struct frame *f;
  struct x_output *x;

  for (tail = Vframe_list; GC_CONSP (tail); tail = XCDR (tail))
    {
      frame = XCAR (tail);
      if (!GC_FRAMEP (frame))
        continue;
      f = XFRAME (frame);
      if (f->output_data.nothing == 1 || FRAME_X_DISPLAY_INFO (f) != dpyinfo)
	continue;
      x = f->output_data.x;

      if (x->widget)
	{
	  /* This frame matches if the window is its topmost widget.  */
	  if (wdesc == XtWindow (x->widget))
	    return f;
#if 0 /* I don't know why it did this,
	 but it seems logically wrong,
	 and it causes trouble for MapNotify events.  */
	  /* Match if the window is this frame's menubar.  */
	  if (x->menubar_widget 
	      && wdesc == XtWindow (x->menubar_widget))
	    return f;
#endif
	}
      else if (FRAME_X_WINDOW (f) == wdesc)
	/* Tooltip frame.  */
	return f;
    }
  return 0;
}
#endif /* USE_X_TOOLKIT */



/* Code to deal with bitmaps.  Bitmaps are referenced by their bitmap
   id, which is just an int that this section returns.  Bitmaps are
   reference counted so they can be shared among frames.

   Bitmap indices are guaranteed to be > 0, so a negative number can
   be used to indicate no bitmap.

   If you use x_create_bitmap_from_data, then you must keep track of
   the bitmaps yourself.  That is, creating a bitmap from the same
   data more than once will not be caught.  */


/* Functions to access the contents of a bitmap, given an id.  */

int
x_bitmap_height (f, id)
     FRAME_PTR f;
     int id;
{
  return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].height;
}

int
x_bitmap_width (f, id)
     FRAME_PTR f;
     int id;
{
  return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].width;
}

int
x_bitmap_pixmap (f, id)
     FRAME_PTR f;
     int id;
{
  return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap;
}


/* Allocate a new bitmap record.  Returns index of new record.  */

static int
x_allocate_bitmap_record (f)
     FRAME_PTR f;
{
  struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
  int i;

  if (dpyinfo->bitmaps == NULL)
    {
      dpyinfo->bitmaps_size = 10;
      dpyinfo->bitmaps
	= (struct x_bitmap_record *) xmalloc (dpyinfo->bitmaps_size * sizeof (struct x_bitmap_record));
      dpyinfo->bitmaps_last = 1;
      return 1;
    }

  if (dpyinfo->bitmaps_last < dpyinfo->bitmaps_size)
    return ++dpyinfo->bitmaps_last;

  for (i = 0; i < dpyinfo->bitmaps_size; ++i)
    if (dpyinfo->bitmaps[i].refcount == 0)
      return i + 1;

  dpyinfo->bitmaps_size *= 2;
  dpyinfo->bitmaps
    = (struct x_bitmap_record *) xrealloc (dpyinfo->bitmaps,
					   dpyinfo->bitmaps_size * sizeof (struct x_bitmap_record));
  return ++dpyinfo->bitmaps_last;
}

/* Add one reference to the reference count of the bitmap with id ID.  */

void
x_reference_bitmap (f, id)
     FRAME_PTR f;
     int id;
{
  ++FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].refcount;
}

/* Create a bitmap for frame F from a HEIGHT x WIDTH array of bits at BITS.  */

int
x_create_bitmap_from_data (f, bits, width, height)
     struct frame *f;
     char *bits;
     unsigned int width, height;
{
  struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
  Pixmap bitmap;
  int id;

  bitmap = XCreateBitmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
				  bits, width, height);

  if (! bitmap)
    return -1;

  id = x_allocate_bitmap_record (f);
  dpyinfo->bitmaps[id - 1].pixmap = bitmap;
  dpyinfo->bitmaps[id - 1].file = NULL;
  dpyinfo->bitmaps[id - 1].refcount = 1;
  dpyinfo->bitmaps[id - 1].depth = 1;
  dpyinfo->bitmaps[id - 1].height = height;
  dpyinfo->bitmaps[id - 1].width = width;

  return id;
}

/* Create bitmap from file FILE for frame F.  */

int
x_create_bitmap_from_file (f, file)
     struct frame *f;
     Lisp_Object file;
{
  struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
  unsigned int width, height;
  Pixmap bitmap;
  int xhot, yhot, result, id;
  Lisp_Object found;
  int fd;
  char *filename;

  /* Look for an existing bitmap with the same name.  */
  for (id = 0; id < dpyinfo->bitmaps_last; ++id)
    {
      if (dpyinfo->bitmaps[id].refcount
	  && dpyinfo->bitmaps[id].file
	  && !strcmp (dpyinfo->bitmaps[id].file, (char *) XSTRING (file)->data))
	{
	  ++dpyinfo->bitmaps[id].refcount;
	  return id + 1;
	}
    }

  /* Search bitmap-file-path for the file, if appropriate.  */
  fd = openp (Vx_bitmap_file_path, file, "", &found, 0);
  if (fd < 0)
    return -1;
  /* XReadBitmapFile won't handle magic file names.  */
  if (fd == 0)
    return -1;
  emacs_close (fd);

  filename = (char *) XSTRING (found)->data;

  result = XReadBitmapFile (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
			    filename, &width, &height, &bitmap, &xhot, &yhot);
  if (result != BitmapSuccess)
    return -1;

  id = x_allocate_bitmap_record (f);
  dpyinfo->bitmaps[id - 1].pixmap = bitmap;
  dpyinfo->bitmaps[id - 1].refcount = 1;
  dpyinfo->bitmaps[id - 1].file
    = (char *) xmalloc (STRING_BYTES (XSTRING (file)) + 1);
  dpyinfo->bitmaps[id - 1].depth = 1;
  dpyinfo->bitmaps[id - 1].height = height;
  dpyinfo->bitmaps[id - 1].width = width;
  strcpy (dpyinfo->bitmaps[id - 1].file, XSTRING (file)->data);

  return id;
}

/* Remove reference to bitmap with id number ID.  */

void
x_destroy_bitmap (f, id)
     FRAME_PTR f;
     int id;
{
  struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);

  if (id > 0)
    {
      --dpyinfo->bitmaps[id - 1].refcount;
      if (dpyinfo->bitmaps[id - 1].refcount == 0)
	{
	  BLOCK_INPUT;
	  XFreePixmap (FRAME_X_DISPLAY (f), dpyinfo->bitmaps[id - 1].pixmap);
	  if (dpyinfo->bitmaps[id - 1].file)
	    {
	      xfree (dpyinfo->bitmaps[id - 1].file);
	      dpyinfo->bitmaps[id - 1].file = NULL;
	    }
	  UNBLOCK_INPUT;
	}
    }
}

/* Free all the bitmaps for the display specified by DPYINFO.  */

static void
x_destroy_all_bitmaps (dpyinfo)
     struct x_display_info *dpyinfo;
{
  int i;
  for (i = 0; i < dpyinfo->bitmaps_last; i++)
    if (dpyinfo->bitmaps[i].refcount > 0)
      {
	XFreePixmap (dpyinfo->display, dpyinfo->bitmaps[i].pixmap);
	if (dpyinfo->bitmaps[i].file)
	  xfree (dpyinfo->bitmaps[i].file);
      }
  dpyinfo->bitmaps_last = 0;
}

/* Connect the frame-parameter names for X frames
   to the ways of passing the parameter values to the window system.

   The name of a parameter, as a Lisp symbol,
   has an `x-frame-parameter' property which is an integer in Lisp
   that is an index in this table.  */

struct x_frame_parm_table
{
  char *name;
  void (*setter) P_ ((struct frame *, Lisp_Object, Lisp_Object));
};

void x_set_foreground_color P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_background_color P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_mouse_color P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_cursor_color P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_border_color P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_cursor_type P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_icon_type P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_icon_name P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_font P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_border_width P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_internal_border_width P_ ((struct frame *, Lisp_Object,
				      Lisp_Object));
void x_explicitly_set_name P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_autoraise P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_autolower P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_vertical_scroll_bars P_ ((struct frame *, Lisp_Object,
				     Lisp_Object));
void x_set_visibility P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_menu_bar_lines P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_scroll_bar_width P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_title P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_unsplittable P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_tool_bar_lines P_ ((struct frame *, Lisp_Object, Lisp_Object));
void x_set_scroll_bar_foreground P_ ((struct frame *, Lisp_Object,
				      Lisp_Object));
void x_set_scroll_bar_background P_ ((struct frame *, Lisp_Object,
				      Lisp_Object));
static Lisp_Object x_default_scroll_bar_color_parameter P_ ((struct frame *,
							     Lisp_Object,
							     Lisp_Object,
							     char *, char *,
							     int));
static void x_set_screen_gamma P_ ((struct frame *, Lisp_Object, Lisp_Object));

static struct x_frame_parm_table x_frame_parms[] =
{
  "auto-raise", x_set_autoraise,
  "auto-lower", x_set_autolower,
  "background-color", x_set_background_color,
  "border-color", x_set_border_color,
  "border-width", x_set_border_width,
  "cursor-color", x_set_cursor_color,
  "cursor-type", x_set_cursor_type,
  "font", x_set_font,
  "foreground-color", x_set_foreground_color,
  "icon-name", x_set_icon_name,
  "icon-type", x_set_icon_type,
  "internal-border-width", x_set_internal_border_width,
  "menu-bar-lines", x_set_menu_bar_lines,
  "mouse-color", x_set_mouse_color,
  "name", x_explicitly_set_name,
  "scroll-bar-width", x_set_scroll_bar_width,
  "title", x_set_title,
  "unsplittable", x_set_unsplittable,
  "vertical-scroll-bars", x_set_vertical_scroll_bars,
  "visibility", x_set_visibility,
  "tool-bar-lines", x_set_tool_bar_lines,
  "scroll-bar-foreground", x_set_scroll_bar_foreground,
  "scroll-bar-background", x_set_scroll_bar_background,
  "screen-gamma", x_set_screen_gamma
};

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

void
init_x_parm_symbols ()
{
  int i;

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

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.  */
  int width, height;

  /* Same here.  */
  Lisp_Object left, top;

  /* Same with these.  */
  Lisp_Object icon_left, icon_top;

  /* Record in these vectors all the parms specified.  */
  Lisp_Object *parms;
  Lisp_Object *values;
  int i, p;
  int left_no_change = 0, top_no_change = 0;
  int icon_left_no_change = 0, icon_top_no_change = 0;

  struct gcpro gcpro1, gcpro2;

  i = 0;
  for (tail = alist; CONSP (tail); tail = Fcdr (tail))
    i++;

  parms = (Lisp_Object *) alloca (i * sizeof (Lisp_Object));
  values = (Lisp_Object *) alloca (i * sizeof (Lisp_Object));

  /* Extract parm names and values into those vectors.  */

  i = 0;
  for (tail = alist; CONSP (tail); tail = Fcdr (tail))
    {
      Lisp_Object elt;

      elt = Fcar (tail);
      parms[i] = Fcar (elt);
      values[i] = Fcdr (elt);
      i++;
    }
  /* TAIL and ALIST are not used again below here.  */
  alist = tail = Qnil;

  GCPRO2 (*parms, *values);
  gcpro1.nvars = i;
  gcpro2.nvars = i;

  /* There is no need to gcpro LEFT, TOP, ICON_LEFT, or ICON_TOP,
     because their values appear in VALUES and strings are not valid.  */
  top = left = Qunbound;
  icon_left = icon_top = Qunbound;

  /* Provide default values for HEIGHT and WIDTH.  */
  if (FRAME_NEW_WIDTH (f))
    width = FRAME_NEW_WIDTH (f);
  else
    width = FRAME_WIDTH (f);

  if (FRAME_NEW_HEIGHT (f))
    height = FRAME_NEW_HEIGHT (f);
  else
    height = FRAME_HEIGHT (f);

  /* Process foreground_color and background_color before anything else.
     They are independent of other properties, but other properties (e.g.,
     cursor_color) are dependent upon them.  */
  for (p = 0; p < i; p++) 
    {
      Lisp_Object prop, val;

      prop = parms[p];
      val = values[p];
      if (EQ (prop, Qforeground_color) || EQ (prop, Qbackground_color))
	{
	  register Lisp_Object param_index, old_value;

	  param_index = Fget (prop, Qx_frame_parameter);
	  old_value = get_frame_param (f, prop);
	  store_frame_param (f, prop, val);
 	  if (NATNUMP (param_index)
	      && (XFASTINT (param_index)
		  < sizeof (x_frame_parms)/sizeof (x_frame_parms[0])))
	    (*x_frame_parms[XINT (param_index)].setter)(f, val, old_value);
	}
    }

  /* Now process them in reverse of specified order.  */
  for (i--; i >= 0; i--)
    {
      Lisp_Object prop, val;

      prop = parms[i];
      val = values[i];

      if (EQ (prop, Qwidth) && NUMBERP (val))
	width = XFASTINT (val);
      else if (EQ (prop, Qheight) && NUMBERP (val))
	height = XFASTINT (val);
      else if (EQ (prop, Qtop))
	top = val;
      else if (EQ (prop, Qleft))
	left = val;
      else if (EQ (prop, Qicon_top))
	icon_top = val;
      else if (EQ (prop, Qicon_left))
	icon_left = val;
      else if (EQ (prop, Qforeground_color) || EQ (prop, Qbackground_color))
	/* Processed above.  */
	continue;
      else
	{
	  register Lisp_Object param_index, old_value;

	  param_index = Fget (prop, Qx_frame_parameter);
	  old_value = get_frame_param (f, prop);
	  store_frame_param (f, prop, val);
 	  if (NATNUMP (param_index)
	      && (XFASTINT (param_index)
		  < sizeof (x_frame_parms)/sizeof (x_frame_parms[0])))
	    (*x_frame_parms[XINT (param_index)].setter)(f, val, old_value);
	}
    }

  /* Don't die if just one of these was set.  */
  if (EQ (left, Qunbound))
    {
      left_no_change = 1;
      if (f->output_data.x->left_pos < 0)
	left = Fcons (Qplus, Fcons (make_number (f->output_data.x->left_pos), Qnil));
      else
	XSETINT (left, f->output_data.x->left_pos);
    }
  if (EQ (top, Qunbound))
    {
      top_no_change = 1;
      if (f->output_data.x->top_pos < 0)
	top = Fcons (Qplus, Fcons (make_number (f->output_data.x->top_pos), Qnil));
      else
	XSETINT (top, f->output_data.x->top_pos);
    }