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Re: aliator.el

From: Andreas Roehler
Subject: Re: aliator.el
Date: Fri, 26 May 2006 18:28:45 +0200
User-agent: KNode/0.9.2

;;; re-written: free vars into let etc. 
;;; aliator.el --- 

;; Copyright (C) 2006  Andreas Roehler

;; Author: Andreas Roehler <address@hidden>
;; Keywords: convenience, docs

;; This file 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 file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; Defines aliases from given command prefix names, in
;; order to enable listing of the (now) expanded names
;; together with the others (more regular named, ie
;; starting with the mode-name).

;; Example for the created list of aliases: 
;;  (defalias 'outline-hide-entry' hide-entry) 
;;  (defalias 'outline-show-entry' show-entry)

;; Edit `newalias-list' according to your needs (all
;; four slots are necessary)

;; ToDo: Provide customization facility and menu

;; FixMe: Probably all the stuff might be better
;; written in order to enhance usability, ease
;; maintenance etc. Please send your suggestions. Is
;; the name ok in English? Dangers anticipated?

;;; Code:

(defvar  newalias-list
"~/emacs/lisp/outline.el" "outline" nil nil
;; "~/progarbeit/emacs/test-mode.el" "xml" "html" nil
"~/emacs/lisp/abbrev.el" "abbrev" nil nil

"~/emacs/lisp/find-dired.el" "dired" nil nil

"~/emacs/lisp/textmodes/sgml-mode.el" "xml" "html" t
  "A list of files to process in order to get aliases.
Edit the list according to your needs. It has the following form:

 \"file to process\" \"prefix\" \"no-alias\" \"replace-prefix\"

where \n`prefix' indicates the new name-prefix where from expansion will work, 
\n`no-alias' the exception, where no alias should be defined - i.e. functions 
start with `html-' in sgml-mode.el - and \n`replace-prefix' cases where it 
seems appropriate to provide an `alias' replacing the first part of the 
function-name concerned, as `xml-' instead of `sgml-'"

;; to change `newalias-list', as `defvar'
;; just once reads it in
(setq newalias-list
       "~/emacs/lisp/outline.el" "outline" nil nil
       ;; "~/progarbeit/emacs/test-mode.el" "xml" "html" nil
       "~/emacs/lisp/abbrev.el" "abbrev" nil nil
       "~/emacs/lisp/find-dired.el" "dired" nil nil
       "~/emacs/lisp/textmodes/sgml-mode.el" "xml" "html" t))

;; derived from comment-string-strip
;; should go to subr.el 

(defun aliator (&optional arg)
  "Provides an `alias' following a given PREFIX.
Works at function names not starting already with that prefix.
In order to normalizes commands as `M-x mode-name- TAB' - now lists all 
functions available, even if they don't start with that PREFIX originally"
  (interactive "P")
  (let ((newalias-list 
         (if arg
             (list (comment-string-strip (read-from-minibuffer "File name: ") t 
                   (comment-string-strip (read-from-minibuffer "Prefix: ") t t))
    (set-buffer (get-buffer-create "neualias"))
    (switch-to-buffer (current-buffer)) 
    (while newalias-list
      (let ((file (car newalias-list))
            (prefix (cadr newalias-list))
            (no-alias (car (nthcdr 2 newalias-list)))
            (replace-prefix (car (nthcdr 3 newalias-list))))
        ;;      (message "%s %s" no-alias replace-prefix)
        (find-file file)
        (goto-char (point-min))
        ;; needed only during development
        ;;      (setq old-buf (current-buffer))
        ;; old fork to get the prefix from mode-name
        ;;       (let ((prefix (substring arg 0 (string-match "-" arg))))
        (while (re-search-forward "(defun \\([A-Za-z0-9\-]+\\)" nil t 1)
          (let ((akt-fn (match-string 1))
                (fn-first-part (substring (match-string 1) 0 (string-match "-" 
(match-string 1)))))
            ;; if the function name already starts with the
            ;; wished name or `no-alias' is set, do nothing
            (unless (or (string= fn-first-part prefix)
                        (string= fn-first-part no-alias))
              ;; avoid repeats in names as dired-look-dired
              (if replace-prefix
                  (setq neualias (concat prefix (substring akt-fn (string-match 
"-" akt-fn))))
                    ((alt-alias (split-string akt-fn "-"))
                     (alias-ohne-neualias (remove prefix alt-alias))
                     (alias-ohne-doppel (delete-dups alias-ohne-neualias))
                  (dolist (teil alias-ohne-doppel)
                    (setq alias-verkettet (concat alias-verkettet "-"(format 
"%s" teil))))
                  (setq neualias (concat prefix alias-verkettet))))
              (if (functionp neualias)
                  (message " %s" "Function already exists")
                  (set-buffer "neualias")
                  (switch-to-buffer (current-buffer))
                  (insert "(defalias '"neualias "'\t"akt-fn")""\n"))
                ;;              (switch-to-buffer old-buf)
        (kill-buffer (current-buffer))) 
      (setq newalias-list (nthcdr 4 newalias-list)))
    (switch-to-buffer "neualias")
    (message "%s" "`M-x eval-buffer' to install these aliases")))

(provide 'aliator)
;;; aliator.el ends here

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