1 | ;;; filename.el --- file name filter |
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2 | |
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3 | ;; Copyright (C) 1996,1997 MORIOKA Tomohiko |
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4 | |
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5 | ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp> |
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6 | ;; Version: $Id: filename.el,v 1.1.1.1 2001/07/19 05:30:49 xtakei Exp $ |
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7 | ;; Keywords: file name, string |
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8 | |
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9 | ;; This file is part of APEL (A Portable Emacs Library). |
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10 | |
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11 | ;; This program is free software; you can redistribute it and/or |
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12 | ;; modify it under the terms of the GNU General Public License as |
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13 | ;; published by the Free Software Foundation; either version 2, or (at |
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14 | ;; your option) any later version. |
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15 | |
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16 | ;; This program is distributed in the hope that it will be useful, but |
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17 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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19 | ;; General Public License for more details. |
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20 | |
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21 | ;; You should have received a copy of the GNU General Public License |
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22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
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23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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24 | ;; Boston, MA 02111-1307, USA. |
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25 | |
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26 | ;;; Code: |
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27 | |
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28 | (require 'emu) ; for backward compatibility. |
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29 | (require 'poe) ; functionp. |
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30 | (require 'poem) ; char-int, and char-length. |
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31 | (require 'path-util) |
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32 | |
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33 | (defsubst poly-funcall (functions argument) |
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34 | "Apply initial ARGUMENT to sequence of FUNCTIONS. |
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35 | FUNCTIONS is list of functions. |
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36 | |
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37 | (poly-funcall '(f1 f2 .. fn) arg) is as same as |
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38 | (fn .. (f2 (f1 arg)) ..). |
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39 | |
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40 | For example, (poly-funcall '(car number-to-string) '(100)) returns |
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41 | \"100\"." |
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42 | (while functions |
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43 | (setq argument (funcall (car functions) argument) |
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44 | functions (cdr functions))) |
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45 | argument) |
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46 | |
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47 | |
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48 | ;;; @ variables |
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49 | ;;; |
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50 | |
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51 | (defvar filename-limit-length 21 "Limit size of file-name.") |
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52 | |
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53 | (defvar filename-replacement-alist |
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54 | '(((?\ ?\t) . "_") |
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55 | ((?! ?\" ?# ?$ ?% ?& ?' ?\( ?\) ?* ?/ |
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56 | ?: ?\; ?< ?> ?? ?\[ ?\\ ?\] ?` ?{ ?| ?}) . "_") |
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57 | (filename-control-p . "")) |
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58 | "Alist list of characters vs. string as replacement. |
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59 | List of characters represents characters not allowed as file-name.") |
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60 | |
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61 | (defvar filename-filters |
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62 | (let ((filters '(filename-special-filter |
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63 | filename-eliminate-top-low-lines |
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64 | filename-canonicalize-low-lines |
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65 | filename-maybe-truncate-by-size |
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66 | filename-eliminate-bottom-low-lines |
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67 | ))) |
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68 | (if (exec-installed-p "kakasi") |
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69 | (cons 'filename-japanese-to-roman-string filters) |
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70 | filters)) |
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71 | "List of functions for file-name filter.") |
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72 | |
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73 | |
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74 | ;;; @ filters |
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75 | ;;; |
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76 | |
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77 | (defun filename-japanese-to-roman-string (str) |
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78 | (save-excursion |
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79 | (set-buffer (get-buffer-create " *temp kakasi*")) |
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80 | (erase-buffer) |
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81 | (insert str) |
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82 | (call-process-region |
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83 | (point-min)(point-max) |
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84 | "kakasi" t t t "-Ha" "-Ka" "-Ja" "-Ea" "-ka") |
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85 | (buffer-string))) |
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86 | |
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87 | (defun filename-control-p (character) |
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88 | (let ((code (char-int character))) |
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89 | (or (< code 32)(= code 127)))) |
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90 | |
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91 | (defun filename-special-filter (string) |
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92 | (let ((len (length string)) |
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93 | (b 0)(i 0) |
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94 | (dest "")) |
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95 | (while (< i len) |
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96 | (let ((chr (sref string i)) |
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97 | (lst filename-replacement-alist) |
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98 | ret) |
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99 | (while (and lst (not ret)) |
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100 | (if (if (functionp (car (car lst))) |
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101 | (setq ret (funcall (car (car lst)) chr)) |
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102 | (setq ret (memq chr (car (car lst))))) |
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103 | t ; quit this loop. |
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104 | (setq lst (cdr lst)))) |
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105 | (if ret |
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106 | (setq dest (concat dest (substring string b i)(cdr (car lst))) |
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107 | i (+ i (char-length chr)) |
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108 | b i) |
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109 | (setq i (+ i (char-length chr)))))) |
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110 | (concat dest (substring string b)))) |
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111 | |
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112 | (defun filename-eliminate-top-low-lines (string) |
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113 | (if (string-match "^_+" string) |
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114 | (substring string (match-end 0)) |
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115 | string)) |
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116 | |
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117 | (defun filename-canonicalize-low-lines (string) |
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118 | (let ((dest "")) |
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119 | (while (string-match "__+" string) |
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120 | (setq dest (concat dest (substring string 0 (1+ (match-beginning 0))))) |
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121 | (setq string (substring string (match-end 0)))) |
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122 | (concat dest string))) |
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123 | |
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124 | (defun filename-maybe-truncate-by-size (string) |
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125 | (if (and (> (length string) filename-limit-length) |
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126 | (string-match "_" string filename-limit-length)) |
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127 | (substring string 0 (match-beginning 0)) |
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128 | string)) |
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129 | |
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130 | (defun filename-eliminate-bottom-low-lines (string) |
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131 | (if (string-match "_+$" string) |
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132 | (substring string 0 (match-beginning 0)) |
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133 | string)) |
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134 | |
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135 | |
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136 | ;;; @ interface |
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137 | ;;; |
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138 | |
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139 | (defun replace-as-filename (string) |
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140 | "Return safety filename from STRING. |
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141 | It refers variable `filename-filters' and default filters refers |
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142 | `filename-limit-length', `filename-replacement-alist'." |
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143 | (and string |
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144 | (poly-funcall filename-filters string))) |
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145 | |
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146 | |
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147 | ;;; @ end |
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148 | ;;; |
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149 | |
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150 | (require 'product) |
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151 | (product-provide (provide 'filename) (require 'apel-ver)) |
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152 | |
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153 | ;;; filename.el ends here |
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