[xemacs-hg @ 2002-05-16 13:30:23 by ben] ui fixes for things that were bothering me bytecode.c, editfns.c, lisp.h, lread.c: Fix save-restriction to use markers rather than pseudo-markers (integers representing the amount of text on either side of the region). That way, all inserts are handled correctly, not just those inside old restriction. Add buffer argument to save_restriction_save(). process.c: Clean up very dirty and kludgy code that outputs into a buffer -- use proper unwind protects, etc. font-lock.c: Do save-restriction/widen around the function -- otherwise, incorrect results will ensue when a buffer has been narrowed before a call to e.g. `buffer-syntactic-context' -- something that happens quite often. fileio.c: Look for a handler for make-temp-name. window.c, winslots.h: Try to solve this annoying problem: have two frames displaying the buffer, in different places; in one, temporarily switch away to another buffer and then back -- and you've lost your position; it's reset to the other one in the other frame. My current solution involves window-level caches of buffers and points (also a cache for window-start); when set-window-buffer is called, it looks to see if the buffer was previously visited in the window, and if so, uses the most recent point at that time. (It's a marker, so it handles changes.) #### Note: It could be argued that doing it on the frame level would be better -- e.g. if you visit a buffer temporarily through a grep, and then go back to that buffer, you presumably want the grep's position rather than some previous position provided everything was in the same frame, even though the grep was in another window in the frame. However, doing it on the frame level fails when you have two windows on the same frame. Perhaps we keep both a window and a frame cache, and use the frame cache if there are no other windows on the frame showing the buffer, else the window's cache? This is probably something to be configurable using a specifier. Suggestions please please please? window.c: Clean up a bit code that deals with the annoyance of window-point vs. point. dialog.el: Function to ask a multiple-choice question, automatically choosing a dialog box or minibuffer representation as necessary. Generalized version of yes-or-no-p, y-or-n-p. files.el: Use get-user-response to ask "yes/no/diff" question when recovering. "diff" means that a diff is displayed between the current file and the autosave. (Converts/deconverts escape-quoted as necessary. No more complaints from you, Mr. Turnbull!) One known problem: when a dialog is used, it's modal, so you can't scroll the diff. Will fix soon. lisp-mode.el: If we're filling a string, don't treat semicolon as a comment, which would give very unfriendly results. Uses `buffer-syntactic-context'. simple.el: all changes back to the beginning. (Useful if you've saved the file in the middle of the changes.) simple.el: Add option kill-word-into-kill-ring, which controls whether words deleted with kill-word, backward-kill-word, etc. are "cut" into the kill ring, or "cleared" into nothingness. (My preference is the latter, by far. I'd almost go so far as suggesting we make it the default, as you can always select a word and then cut it if you want it cut.) menubar-items.el: Add option corresponding to kill-word-into-kill-ring.

/* Primitives for work of the "widget" library.
   Copyright (C) 1997 Free Software Foundation, Inc.

This file is part of XEmacs.

XEmacs 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.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* In an ideal world, this file would not have been necessary.
   However, elisp function calls being as slow as they are, it turns
   out that some functions in the widget library (wid-edit.el) are the
   bottleneck of Widget operation.  Here is their translation to C,
   for the sole reason of efficiency.  */

#include <config.h>
#include "lisp.h"
#include "buffer.h"


Lisp_Object Qwidget_type;


DEFUN ("widget-plist-member", Fwidget_plist_member, 2, 2, 0, /*
Like `plist-get', but returns the tail of PLIST whose car is PROP.
*/
       (plist, prop))
{
  while (!NILP (plist) && !EQ (Fcar (plist), prop))
    {
      /* Check for QUIT, so a circular plist doesn't lock up the
         editor. */
      QUIT;
      plist = Fcdr (Fcdr (plist));
    }
  return plist;
}

DEFUN ("widget-put", Fwidget_put, 3, 3, 0, /*
In WIDGET set PROPERTY to VALUE.
The value can later be retrieved with `widget-get'.
*/
       (widget, property, value))
{
  CHECK_CONS (widget);
  XCDR (widget) = Fplist_put (XCDR (widget), property, value);
  return widget;
}

DEFUN ("widget-get", Fwidget_get, 2, 2, 0, /*
  In WIDGET, get the value of PROPERTY.
The value could either be specified when the widget was created, or
later with `widget-put'.
*/
       (widget, property))
{
  Lisp_Object value = Qnil;

  while (1)
    {
      Lisp_Object tmp = Fwidget_plist_member (Fcdr (widget), property);
      if (!NILP (tmp))
	{
	  value = Fcar (Fcdr (tmp));
	  break;
	}
      tmp = Fcar (widget);
      if (!NILP (tmp))
	{
	  widget = Fget (tmp, Qwidget_type, Qnil);
	  continue;
	}
      break;
    }
  return value;
}

DEFUN ("widget-apply", Fwidget_apply, 2, MANY, 0, /*
Apply the value of WIDGET's PROPERTY to the widget itself.
ARGS are passed as extra arguments to the function.
*/
       (int nargs, Lisp_Object *args))
{
  /* This function can GC */
  Lisp_Object newargs[3];
  struct gcpro gcpro1;

  newargs[0] = Fwidget_get (args[0], args[1]);
  newargs[1] = args[0];
  newargs[2] = Flist (nargs - 2, args + 2);
  GCPRO1 (newargs[2]);
  RETURN_UNGCPRO (Fapply (3, newargs));
}

void
syms_of_widget (void)
{
  DEFSYMBOL (Qwidget_type);

  DEFSUBR (Fwidget_plist_member);
  DEFSUBR (Fwidget_put);
  DEFSUBR (Fwidget_get);
  DEFSUBR (Fwidget_apply);
}