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- ;;; filename.el --- file name filter
-
- ;; Copyright (C) 1996,1997 MORIOKA Tomohiko
-
- ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
- ;; Version: $Id: filename.el,v 2.1 1997/11/06 15:50:53 morioka Exp $
- ;; Keywords: file name, string
-
- ;; 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 GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Code:
-
- (require 'emu)
- (require 'cl)
-
- (defsubst poly-funcall (functions argument)
- "Apply initial ARGUMENT to sequence of FUNCTIONS.
- FUNCTIONS is list of functions.
-
- (poly-funcall '(f1 f2 .. fn) arg) is as same as
- (fn .. (f2 (f1 arg)) ..).
-
- For example, (poly-funcall '(car number-to-string) '(100)) returns
- \"100\"."
- (while functions
- (setq argument (funcall (car functions) argument)
- functions (cdr functions))
- )
- argument)
-
-
- ;;; @ variables
- ;;;
-
- (defvar filename-limit-length 21 "Limit size of file-name.")
-
- (defvar filename-replacement-alist
- '(((?\ ?\t) . "_")
- ((?! ?\" ?# ?$ ?% ?& ?' ?\( ?\) ?* ?/
- ?: ?\; ?< ?> ?? ?\[ ?\\ ?\] ?` ?{ ?| ?}) . "_")
- (filename-control-p . "")
- )
- "Alist list of characters vs. string as replacement.
- List of characters represents characters not allowed as file-name.")
-
- (defvar filename-filters
- (let ((filters '(filename-special-filter
- filename-eliminate-top-low-lines
- filename-canonicalize-low-lines
- filename-maybe-truncate-by-size
- filename-eliminate-bottom-low-lines
- )))
- (require 'path-util)
- (if (exec-installed-p "kakasi")
- (cons 'filename-japanese-to-roman-string filters)
- filters))
- "List of functions for file-name filter.")
-
-
- ;;; @ filters
- ;;;
-
- (defun filename-japanese-to-roman-string (str)
- (save-excursion
- (set-buffer (get-buffer-create " *temp kakasi*"))
- (erase-buffer)
- (insert str)
- (call-process-region (point-min)(point-max) "kakasi" t t t
- "-Ha" "-Ka" "-Ja" "-Ea" "-ka")
- (buffer-string)
- ))
-
- (defun filename-control-p (character)
- (let ((code (char-int character)))
- (or (< code 32)(= code 127))
- ))
-
- (defun filename-special-filter (string)
- (let (dest
- (i 0)
- (len (length string))
- (b 0)
- )
- (while (< i len)
- (let* ((chr (sref string i))
- (ret (assoc-if (function
- (lambda (key)
- (if (functionp key)
- (funcall key chr)
- (memq chr key)
- )))
- filename-replacement-alist))
- )
- (if ret
- (setq dest (concat dest (substring string b i)(cdr ret))
- i (+ i (char-length chr))
- b i)
- (setq i (+ i (char-length chr)))
- )))
- (concat dest (substring string b))
- ))
-
- (defun filename-eliminate-top-low-lines (string)
- (if (string-match "^_+" string)
- (substring string (match-end 0))
- string))
-
- (defun filename-canonicalize-low-lines (string)
- (let (dest)
- (while (string-match "__+" string)
- (setq dest (concat dest (substring string 0 (1+ (match-beginning 0)))))
- (setq string (substring string (match-end 0)))
- )
- (concat dest string)
- ))
-
- (defun filename-maybe-truncate-by-size (string)
- (if (and (> (length string) filename-limit-length)
- (string-match "_" string filename-limit-length)
- )
- (substring string 0 (match-beginning 0))
- string))
-
- (defun filename-eliminate-bottom-low-lines (string)
- (if (string-match "_+$" string)
- (substring string 0 (match-beginning 0))
- string))
-
-
- ;;; @ interface
- ;;;
-
- (defun replace-as-filename (string)
- "Return safety filename from STRING.
- It refers variable `filename-filters' and default filters refers
- `filename-limit-length', `filename-replacement-alist'."
- (and string
- (poly-funcall filename-filters string)
- ))
-
-
- ;;; @ end
- ;;;
-
- (provide 'filename)
-
- ;;; filename.el ends here
-