1 ;;; filename.el --- file name filter
3 ;; Copyright (C) 1996,1997 MORIOKA Tomohiko
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Version: $Id: filename.el,v 2.1 1997/11/06 15:50:53 morioka Exp $
7 ;; Keywords: file name, string
9 ;; This file is part of APEL (A Portable Emacs Library).
11 ;; This program is free software; you can redistribute it and/or
12 ;; modify it under the terms of the GNU General Public License as
13 ;; published by the Free Software Foundation; either version 2, or (at
14 ;; your option) any later version.
16 ;; This program is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 (require 'emu) ; for backward compatibility.
29 (require 'poe) ; functionp.
30 (require 'poem) ; char-int, and char-length.
33 (defsubst poly-funcall (functions argument)
34 "Apply initial ARGUMENT to sequence of FUNCTIONS.
35 FUNCTIONS is list of functions.
37 (poly-funcall '(f1 f2 .. fn) arg) is as same as
38 (fn .. (f2 (f1 arg)) ..).
40 For example, (poly-funcall '(car number-to-string) '(100)) returns
43 (setq argument (funcall (car functions) argument)
44 functions (cdr functions)))
51 (defvar filename-limit-length 21 "Limit size of file-name.")
53 (defvar filename-replacement-alist
55 ((?! ?\" ?# ?$ ?% ?& ?' ?\( ?\) ?* ?/
56 ?: ?\; ?< ?> ?? ?\[ ?\\ ?\] ?` ?{ ?| ?}) . "_")
57 (filename-control-p . ""))
58 "Alist list of characters vs. string as replacement.
59 List of characters represents characters not allowed as file-name.")
61 (defvar filename-filters
62 (let ((filters '(filename-special-filter
63 filename-eliminate-top-low-lines
64 filename-canonicalize-low-lines
65 filename-maybe-truncate-by-size
66 filename-eliminate-bottom-low-lines
68 (if (exec-installed-p "kakasi")
69 (cons 'filename-japanese-to-roman-string filters)
71 "List of functions for file-name filter.")
77 (defun filename-japanese-to-roman-string (str)
79 (set-buffer (get-buffer-create " *temp kakasi*"))
83 (point-min)(point-max)
84 "kakasi" t t t "-Ha" "-Ka" "-Ja" "-Ea" "-ka")
87 (defun filename-control-p (character)
88 (let ((code (char-int character)))
89 (or (< code 32)(= code 127))))
91 (defun filename-special-filter (string)
92 (let ((len (length string))
96 (let ((chr (sref string i))
97 (lst filename-replacement-alist)
99 (while (and lst (not ret))
100 (if (if (functionp (car (car lst)))
101 (setq ret (funcall (car (car lst)) chr))
102 (setq ret (memq chr (car (car lst)))))
104 (setq lst (cdr lst))))
106 (setq dest (concat dest (substring string b i)(cdr (car lst)))
107 i (+ i (char-length chr))
109 (setq i (+ i (char-length chr))))))
110 (concat dest (substring string b))))
112 (defun filename-eliminate-top-low-lines (string)
113 (if (string-match "^_+" string)
114 (substring string (match-end 0))
117 (defun filename-canonicalize-low-lines (string)
119 (while (string-match "__+" string)
120 (setq dest (concat dest (substring string 0 (1+ (match-beginning 0)))))
121 (setq string (substring string (match-end 0))))
122 (concat dest string)))
124 (defun filename-maybe-truncate-by-size (string)
125 (if (and (> (length string) filename-limit-length)
126 (string-match "_" string filename-limit-length))
127 (substring string 0 (match-beginning 0))
130 (defun filename-eliminate-bottom-low-lines (string)
131 (if (string-match "_+$" string)
132 (substring string 0 (match-beginning 0))
139 (defun replace-as-filename (string)
140 "Return safety filename from STRING.
141 It refers variable `filename-filters' and default filters refers
142 `filename-limit-length', `filename-replacement-alist'."
144 (poly-funcall filename-filters string)))
152 ;;; filename.el ends here