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1 ;;; dired-chmod.el - interactive editing of file permissions in Dired listings.
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2
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3 ;;; Copyright (C) 1995 Russell Ritchie, <Russell.Ritchie@gssec.bt.co.uk>
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4
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5 ;; Keywords: dired extensions, faces, interactive chmod
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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21 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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22
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23 ;;; To turn this on do:
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24 ;;; (require 'dired-chmod)
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25 ;;; (add-hook 'dired-after-readin-hook 'dired-permissions-highlight)
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26
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27 (require 'dired) ;
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28
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29 (defvar dired-permissions-regexp "[-r][-w][-Ssx][-r][-w][-sx][-r][-w][-xst]"
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30 "Regexp matching the file permissions part of a dired line.")
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31
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32 (defvar dired-pre-permissions-regexp "^. [0-9 ]*[-d]"
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33 "Regexp matching the preamble to file permissions part of a dired line.
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34 This shouldn't match socket or symbolic link lines (which aren't editable).")
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35
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36 (or (find-face 'dired-face-permissions)
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37 (and
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38 (make-face 'dired-face-permissions)
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39 (set-face-foreground 'dired-face-permissions '(color . "mediumorchid")
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40 nil nil 'append)
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41 (set-face-underline-p 'dired-face-permissions '((mono . t)
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42 (grayscale . t)) nil
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43 nil 'append)))
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44
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45 (defun dired-activate-extent (extent keys fn)
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46 (let ((keymap (make-sparse-keymap)))
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47 (while keys
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48 (define-key keymap (car keys) fn)
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49 (setq keys (cdr keys)))
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50 (set-extent-face extent 'dired-face-permissions)
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51 (set-extent-property extent 'keymap keymap)
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52 (set-extent-property extent 'highlight t)
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53 (set-extent-property
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54 extent 'help-echo
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55 "Type rsStwx to set file permissions to taste interactively.")))
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56
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57 (defun dired-chmod-do-chmod (state)
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58 (let* ((file (dired-get-filename))
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59 (operation (concat "chmod" " " state " " file))
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60 (failure (apply (function dired-check-process)
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61 operation "chmod" state (list file)))
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62 (here (point)))
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63 (dired-do-redisplay)
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64 (goto-char (+ here 1))
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65 (dired-make-permissions-interactive)
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66 (if failure
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67 (dired-log-summary
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68 (message "%s: error - type W to see why." operation)))))
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69
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70 (defun dired-u-r ()
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71 (interactive)
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72 (if (equal (event-key last-command-event) ?r)
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73 (dired-chmod-do-chmod "u+r")
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74 (dired-chmod-do-chmod "u-r")))
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75
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76 (defun dired-u-w ()
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77 (interactive)
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78 (if (equal (event-key last-command-event) ?w)
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79 (dired-chmod-do-chmod "u+w")
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80 (dired-chmod-do-chmod "u-w")))
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81
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82 (defun dired-u-x ()
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83 (interactive)
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84 (let ((key (event-key last-command-event)))
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85 (cond ((equal key ?s) (dired-chmod-do-chmod "u+s"))
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86 ((equal key ?S) (dired-chmod-do-chmod "u+S"))
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87 ((equal key ?x) (dired-chmod-do-chmod "u+x"))
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88 (t (dired-chmod-do-chmod (cond ((looking-at "s") "u-s")
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89 ((looking-at "S") "u-S")
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90 ((looking-at "x") "u-x")
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91 (t "u-x")))))))
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92
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93 (defun dired-g-r ()
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94 (interactive)
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95 (if (equal (event-key last-command-event) ?r)
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96 (dired-chmod-do-chmod "g+r")
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97 (dired-chmod-do-chmod "g-r")))
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98
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99 (defun dired-g-w ()
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100 (interactive)
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101 (if (equal (event-key last-command-event) ?w)
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102 (dired-chmod-do-chmod "g+w")
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103 (dired-chmod-do-chmod "g-w")))
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104
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105 (defun dired-g-x ()
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106 (interactive)
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107 (let ((key (event-key last-command-event)))
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108 (cond ((equal key ?s) (dired-chmod-do-chmod "g+s"))
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109 ((equal key ?x) (dired-chmod-do-chmod "g+x"))
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110 (t (dired-chmod-do-chmod (if (looking-at "s") "g-s" "g-x"))))))
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111
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112 (defun dired-o-r ()
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113 (interactive)
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114 (if (equal (event-key last-command-event) ?r)
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115 (dired-chmod-do-chmod "o+r")
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116 (dired-chmod-do-chmod "o-r")))
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117
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118 (defun dired-o-w ()
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119 (interactive)
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120 (if (equal (event-key last-command-event) ?w)
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121 (dired-chmod-do-chmod "o+w")
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122 (dired-chmod-do-chmod "o-w")))
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123
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124 (defun dired-o-x ()
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125 (interactive)
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126 (let ((key (event-key last-command-event)))
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127 (cond ((equal key ?s) (dired-chmod-do-chmod "o+s"))
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128 ((equal key ?t) (dired-chmod-do-chmod "o+t"))
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129 ((equal key ?x) (dired-chmod-do-chmod "o+x"))
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130 (t (dired-chmod-do-chmod (cond ((looking-at "s") "o-s")
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131 ((looking-at "t") "o-t")
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132 ((looking-at "x") "o-x")
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133 (t "o-x")))))))
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134
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135 ;;;###autoload
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136 (defun dired-make-permissions-interactive ()
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137 (save-excursion
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138 (beginning-of-line 0)
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139 (if (and (re-search-forward dired-pre-permissions-regexp (end-of-line) t)
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140 (looking-at dired-permissions-regexp))
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141 (let* ((start (point))
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142 (u-r-extent (make-extent start (+ start 1)))
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143 (u-w-extent (make-extent (+ start 1) (+ start 2)))
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144 (u-x-extent (make-extent (+ start 2) (+ start 3)))
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145 (g-r-extent (make-extent (+ start 3) (+ start 4)))
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146 (g-w-extent (make-extent (+ start 4) (+ start 5)))
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147 (g-x-extent (make-extent (+ start 5) (+ start 6)))
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148 (o-r-extent (make-extent (+ start 6) (+ start 7)))
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149 (o-w-extent (make-extent (+ start 7) (+ start 8)))
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150 (o-x-extent (make-extent (+ start 8) (+ start 9))))
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151 (dired-activate-extent u-r-extent '(r space) 'dired-u-r)
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152 (dired-activate-extent u-w-extent '(w space) 'dired-u-w)
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153 (dired-activate-extent u-x-extent '(s S x space) 'dired-u-x)
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154 (dired-activate-extent g-r-extent '(r space) 'dired-g-r)
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155 (dired-activate-extent g-w-extent '(w space) 'dired-g-w)
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156 (dired-activate-extent g-x-extent '(s x space) 'dired-g-x)
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157 (dired-activate-extent o-r-extent '(r space) 'dired-o-r)
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158 (dired-activate-extent o-w-extent '(w space) 'dired-o-w)
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159 (dired-activate-extent o-x-extent '(s t x space) 'dired-o-x)))))
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160
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161 (defun dired-permissions-highlight ()
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162 (message "Highlighting permissions...")
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163 (save-excursion
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164 (goto-char (point-min))
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165 (while (not (eobp))
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166 (and (not (eolp))
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167 (dired-make-permissions-interactive))
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168 (forward-line 1))
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169 (message "Highlighting permissions...done")))
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170
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171 (provide 'dired-chmod)
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172
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173 ;; dired-chmod.el ends here.
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