Source

apel / filename.el

Full commit
steve e38873c 


























steveb e07b8e4 



steve e38873c 











steveb e07b8e4 
steve e38873c 











steveb e07b8e4 
steve e38873c 























steveb e07b8e4 



steve e38873c 


steveb e07b8e4 
steve e38873c 

steveb e07b8e4 


steve e38873c 
steveb e07b8e4 








steve e38873c 
steveb e07b8e4 
steve e38873c 

steveb e07b8e4 

steve e38873c 






steveb e07b8e4 
steve e38873c 

steveb e07b8e4 

steve e38873c 


steveb e07b8e4 
steve e38873c 
















steveb e07b8e4 
steve e38873c 




yoshiki 833a3fa 

steve e38873c 
;;; filename.el --- file name filter

;; Copyright (C) 1996,1997 MORIOKA Tomohiko

;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Version: $Id$
;; 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)				; for backward compatibility.
(require 'poe)				; functionp.
(require 'poem)				; char-int, and char-length.
(require 'path-util)

(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
		   )))
    (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 ((len (length string))
	(b 0)(i 0)
	(dest ""))
    (while (< i len)
      (let ((chr (sref string i))
            (lst filename-replacement-alist)
            ret)
        (while (and lst (not ret))
          (if (if (functionp (car (car lst)))
                  (setq ret (funcall (car (car lst)) chr))
                (setq ret (memq chr (car (car lst)))))
              t                         ; quit this loop.
            (setq lst (cdr lst))))
	(if ret
	    (setq dest (concat dest (substring string b i)(cdr (car lst)))
		  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
;;;

(require 'product)
(product-provide (provide 'filename) (require 'apel-ver))

;;; filename.el ends here