aliator.el

[Andreas Roehler]

;;; 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
;; 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., 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
  (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
      (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))

(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")
  (when arg
    (setq new-list
          (list (read-from-minibuffer "File name: ")
                (read-from-minibuffer "Prefix: ")))
    (setcar new-list (progn 
                       (string-match (concat "\\`" "\\s-*"
                                             "\\(.*?\\)"
                                             "\\s-*\n?"
                                             "\\'") (car new-list))
                       (match-string 1 (car new-list))))
    (if (and (not (string= "" (car new-list)))
             (not (string= "" (cadr new-list))))
        (setq newalias-list new-list)
      (error "Error: no file or prefix found %s " new-list)))
  (set-buffer (get-buffer-create "neualias"))
  (switch-to-buffer (current-buffer)) 
  (erase-buffer) 
  (let ((newalias-list newalias-list))
    (while newalias-list
      (setq 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))
      (setq old-buf (current-buffer))
      (eval-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))))
              (let*
                  ((alt-alias (split-string akt-fn "-"))
                   (alias-ohne-neualias (remove prefix alt-alias))
                   (alias-ohne-doppel (delete-dups alias-ohne-neualias))
                   alias-verkettet)
                (dolist (teil alias-ohne-doppel)
                  (setq alias-verkettet (concat alias-verkettet "-"(format "%s"
teil))))
                (setq neualias (concat prefix alias-verkettet))))
            (if (functionp neualias)
                (message "Bereits als Funktion vorhanden; %s")
              (save-excursion
                (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