[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.

;;; alist.el --- utility functions about association-list

;; Copyright (C) 1993,1994,1995,1996,1998 Free Software Foundation, Inc.

;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Keywords: alist

;; This file is part of APEL (A Portable Emacs Library).

;; This program 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.

;; This program 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.


;;;###autoload
(defun vassoc (key valist)
  "Search VALIST for a vector whose first element is equal to KEY.
See also `assoc'."
  ;; by Stig@hackvan.com
  (let (el)
    (catch 'done
      (while (setq el (pop valist))
	(and (equal key (aref el 0))
	     (throw 'done el))))))


;;;###autoload
(defun put-alist (item value alist)
  "Modify ALIST to set VALUE to ITEM.
If there is a pair whose car is ITEM, replace its cdr by VALUE.
If there is not such pair, create new pair (ITEM . VALUE) and
return new alist whose car is the new pair and cdr is ALIST.
\[tomo's ELIS like function]"
  (let ((pair (assoc item alist)))
    (if pair
	(progn
	  (setcdr pair value)
	  alist)
      (cons (cons item value) alist)
      )))

;;;###autoload
(defun del-alist (item alist)
  "If there is a pair whose key is ITEM, delete it from ALIST.
\[tomo's ELIS emulating function]"
  (if (equal item (car (car alist)))
      (cdr alist)
    (let ((pr alist)
	  (r (cdr alist))
	  )
      (catch 'tag
	(while (not (null r))
	  (if (equal item (car (car r)))
	      (progn
		(rplacd pr (cdr r))
		(throw 'tag alist)))
	  (setq pr r)
	  (setq r (cdr r))
	  )
	alist))))

;;;###autoload
(defun set-alist (symbol item value)
  "Modify a alist indicated by SYMBOL to set VALUE to ITEM."
  (or (boundp symbol)
      (set symbol nil)
      )
  (set symbol (put-alist item value (symbol-value symbol)))
  )

;;;###autoload
(defun remove-alist (symbol item)
  "Remove ITEM from the alist indicated by SYMBOL."
  (and (boundp symbol)
       (set symbol (del-alist item (symbol-value symbol)))
       ))

;;;###autoload
(defun modify-alist (modifier default)
  "Modify alist DEFAULT into alist MODIFIER."
  (mapcar (function
	   (lambda (as)
	     (setq default (put-alist (car as)(cdr as) default))
	     ))
	  modifier)
  default)

;;;###autoload
(defun set-modified-alist (sym modifier)
  "Modify a value of a symbol SYM into alist MODIFIER.
The symbol SYM should be alist. If it is not bound,
its value regard as nil."
  (if (not (boundp sym))
      (set sym nil)
    )
  (set sym (modify-alist modifier (eval sym)))
  )


;;; @ end
;;;

(provide 'alist)

;;; alist.el ends here