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comparison lisp/dired/dired-vms.el @ 0:376386a54a3c r19-14

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date Mon, 13 Aug 2007 08:45:50 +0200
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1 ;; dired-vms.el - VMS support for dired. Revision: 1.17
2 ;; Copyright (C) 1990, 1992 Free Software Foundation, Inc.
3
4 ;; This file is part of XEmacs.
5
6 ;; XEmacs is free software; you can redistribute it and/or modify it
7 ;; under the terms of the GNU General Public License as published by
8 ;; the Free Software Foundation; either version 2, or (at your option)
9 ;; any later version.
10
11 ;; XEmacs is distributed in the hope that it will be useful, but
12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ;; General Public License for more details.
15
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with XEmacs; see the file COPYING. If not, write to the Free
18 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19
20 ;; Id: dired-vms.el,v 1.17 1991/09/09 16:54:03 sk RelBeta
21
22 ;; You'll need vmsproc.el for this function:
23 (autoload 'subprocess-command-to-buffer "vmsproc")
24
25 (setq dired-subdir-regexp "^ *Directory \\([][:.A-Z-0-9_$;<>]+\\)\\(\\)[\n\r]")
26
27 (defconst dired-vms-filename-regexp
28 "\\(\\([_A-Z0-9$]?\\|[_A-Z0-9$][_A-Z0-9$---]*\\)\\.[_A-Z0-9$---]*;+[0-9]*\\)"
29 "Regular expression to match for a valid VMS file name in Dired buffer.
30 Stupid freaking bug! Position of _ and $ shouldn't matter but they do.
31 Having [A-Z0-9$_] bombs on filename _$$CHANGE_LOG$.TXT$ and $CHANGE_LOG$.TX
32 Other orders of $ and _ seem to all work just fine.")
33
34 (setq dired-re-mark "^[^ \n\t]")
35
36 (defvar dired-directory-command
37 "DIRECTORY/SIZE/DATE/PROT"
38 "Directory command for dired under VMS.")
39
40 ;; requires vmsproc.el to work
41 (defun dired-ls (file switches &optional wildcard full-directory-p)
42 "Insert ls output of FILE,formatted according to SWITCHES.
43 Optional third arg WILDCARD means treat FILE as shell wildcard.
44 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
45 switches do not contain `d'.
46
47 SWITCHES default to dired-listing-switches.
48
49 This is the VMS version of this UNIX command.
50 The SWITCHES and WILDCARD arguments are ignored.
51 Uses dired-directory-command."
52 (save-restriction;; Must drag point along:
53 (narrow-to-region (point) (point))
54 (subprocess-command-to-buffer
55 (concat dired-directory-command " " file)
56 (current-buffer))
57 (if full-directory-p
58 (goto-char (point-max))
59 ;; Just the file line if no full directory required:
60 (goto-char (point-min))
61 (let ((case-fold-search nil))
62 (re-search-forward dired-subdir-regexp)
63 (re-search-forward (concat "^" dired-vms-filename-regexp)))
64 (beginning-of-line)
65 (delete-region (point-min) (point))
66 (forward-line 1)
67 (delete-region (point) (point-max)))))
68
69 (defun dired-insert-headerline (dir) ; redefinition
70 ;; VMS dired-ls makes its own headerline, but we must position the
71 ;; cursor where dired-insert-subdir expects it.
72 ;; This does not check whether the headerline matches DIR.
73 (re-search-forward dired-subdir-regexp)
74 (goto-char (match-end 1)))
75
76
77 (defun dired-make-absolute (file &optional dir)
78 ;;"Convert FILE (a pathname relative to DIR) to an absolute pathname."
79 ;; This should be good enough for ange-ftp, but might easily be
80 ;; redefined (for VMS?).
81 ;; It should be reasonably fast, though, as it is called in
82 ;; dired-get-filename.
83 (concat (or dir
84 (dired-current-directory)
85 default-directory)
86 file))
87
88 (defun dired-make-relative (file &optional dir)
89 ;; In VMS we don't want relative names at all because of search path
90 ;; logical names. Also, we never need to raise an error when a file
91 ;; `doesn't belong' in this buffer (like in the Unix case).
92 file)
93
94 (defun dired-in-this-tree (file dir)
95 ;;"Is FILE part of the directory tree starting at DIR?"
96 ;; Under VMS, file="DEV:[foo.bar]zod", dir="DEV:[foo]"
97 (or (string= (substring dir -1) "\]")
98 (string= (substring dir -1) "\:")
99 (error "Not a directory: %s" dir))
100 (string-match (concat "^" (regexp-quote (substring dir 0 -1)))
101 file))
102
103 (defun dired-vms-split-filename (file)
104 (if (string-match;; "DEV:[DIR]FIL" \1=DEV \2=DIR \3=FIL
105 "^\\([.A-Z-0-9_$;]*\\):?[[<]\\([.A-Z-0-9_$;]*\\)[]>]\\([.A-Z-0-9_$;]*\\)$"
106 file)
107 (mapcar '(lambda (x)
108 (substring file (match-beginning x) (match-end x)))
109 '(1 2 3))))
110
111 ;; Must use this in dired-noselect instead of expand-file-name and
112 ;; file-name-as-directory
113 ;; Taken from the VMS dired version by
114 ;;Roland Roberts BITNET: roberts@uornsrl
115 ;; Nuclear Structure Research Lab INTERNET: rbr4@uhura.cc.rochester.edu
116 ;; 271 East River Road UUCP: rochester!ur-cc!uhura!rbr4
117 ;; Rochester, NY 14267 AT&T: (716) 275-8962
118
119
120 (defun dired-noselect (dirname &optional switches)
121 "Like M-x dired but returns the dired buffer as value, does not select it."
122 (setq dirname (dired-fix-directory dirname))
123 (dired-internal-noselect dirname switches))
124
125 (defun dired-fix-directory (dirname)
126 "Fix up dirname to be a valid directory name and return it"
127 (setq dirname
128 (expand-file-name (or dirname (setq dirname default-directory))))
129 (let ((end (1- (length dirname)))
130 bracket colon)
131 (if (or (char-equal ?\] (elt dirname end))
132 (char-equal ?\: (elt dirname end)))
133 dirname
134 (setq bracket (string-match "\\]" dirname))
135 (setq colon (string-match "\\:" dirname))
136 (setq end (string-match "\\.DIR" dirname (or bracket colon)))
137 (if end
138 (let ((newdir
139 (if bracket (concat (substring dirname 0 bracket)
140 ".")
141 (if colon (concat (substring dirname 0 (1+ colon))
142 "[")
143 "["))))
144 (concat newdir (substring dirname
145 (1+ (or bracket colon)) end)
146 "]"))
147 (if bracket (substring dirname 0 (1+ bracket))
148 (if colon (substring dirname 0 (1+ colon))
149 default-directory))))))
150
151 ;; Versions are not yet supported in dired.el (as of version 4.53):
152 ;;(setq dired-file-version-regexp "[.;][0-9]+$")
153
154 (defun dired-move-to-filename (&optional raise-error eol)
155 "In dired, move to first char of filename on this line.
156 Returns position (point) or nil if no filename on this line."
157 ;; This is the VMS version.
158 (or eol (setq eol (progn (end-of-line) (point))))
159 (beginning-of-line)
160 (if (re-search-forward (concat " " dired-vms-filename-regexp) eol t)
161 (goto-char (match-beginning 1))
162 (if raise-error
163 (error "No file on this line")
164 nil)))
165
166 (defun dired-move-to-end-of-filename (&optional no-error eol)
167 ;; Assumes point is at beginning of filename,
168 ;; thus the rwx bit re-search-backward below will succeed in *this* line.
169 ;; So, it should be called only after (dired-move-to-filename t).
170 ;; case-fold-search must be nil, at least for VMS.
171 ;; On failure, signals an error or returns nil.
172 ;; This is the VMS version.
173 (let (opoint flag ex sym hidden case-fold-search)
174 (setq opoint (point))
175 (or eol (setq eol (save-excursion (end-of-line) (point))))
176 (setq hidden (and selective-display
177 (save-excursion (search-forward "\r" eol t))))
178 (if hidden
179 nil
180 (re-search-forward dired-vms-filename-regexp eol t))
181 (or no-error
182 (not (eq opoint (point)))
183 (error (if hidden
184 (substitute-command-keys
185 "File line is hidden, type \\[dired-hide-subdir] to unhide")
186 "No file on this line")))
187 (if (eq opoint (point))
188 nil
189 (point))))
190
191 (defun dired-tree-lessp (dir1 dir2)
192 (setq dir1 (substring (file-name-as-directory dir1) 0 -1)
193 dir2 (substring (file-name-as-directory dir2) 0 -1))
194 (let ((components-1 (dired-split "[:.]" dir1))
195 (components-2 (dired-split "[:.]" dir2)))
196 (while (and components-1
197 components-2
198 (equal (car components-1) (car components-2)))
199 (setq components-1 (cdr components-1)
200 components-2 (cdr components-2)))
201 (let ((c1 (car components-1))
202 (c2 (car components-2)))
203
204 (cond ((and c1 c2)
205 (string-lessp c1 c2))
206 ((and (null c1) (null c2))
207 nil) ; they are equal, not lessp
208 ((null c1) ; c2 is a subdir of c1: c1<c2
209 t)
210 ((null c2) ; c1 is a subdir of c2: c1>c2
211 nil)
212 (t (error "This can't happen"))))))
213
214 (defun dired-insert-subdir-validate (dirname)
215 (let ((alist dired-subdir-alist)
216 (found nil)
217 item)
218 (while (and alist (not found))
219 (setq item (car alist)
220 alist (cdr alist))
221 (setq found (dired-in-this-tree dirname (car item))))
222 (if (not found)
223 (error "%s: directory not in this buffer" dirname))))
224
225 (defun dired-insert-subdir-newpos (new-dir)
226 ;; Find pos for new subdir, according to tree order.
227 (let ((alist (reverse dired-subdir-alist)) elt dir pos new-pos found)
228 (while alist
229 (setq elt (car alist)
230 alist (cdr alist)
231 dir (car elt)
232 pos (dired-get-subdir-min elt))
233 (if (or (and found
234 (or (dired-in-this-tree dir found)
235 (setq alist nil)))
236 (and (dired-in-this-tree new-dir dir)
237 (setq found dir)))
238 (if (dired-tree-lessp dir new-dir)
239 ;; Insert NEW-DIR after DIR
240 (setq new-pos (dired-get-subdir-max elt)))))
241 (goto-char new-pos))
242 ;; want a separating newline between subdirs
243 (or (eobp)
244 (forward-line -1))
245 (insert "\n")
246 (point))
247
248 (defun dired-between-files ()
249 (save-excursion
250 (beginning-of-line)
251 (or (equal (following-char) 9)
252 (progn (forward-char 2)
253 (or (looking-at "Total of")
254 (equal (following-char) 32))))))
255
256 (defun dired-buffers-for-dir (dir)
257 ;; Return a list of buffers that dired DIR (top level or in-situ subdir).
258 ;; The list is in reverse order of buffer creation, most recent last.
259 ;; As a side effect, killed dired buffers for DIR are removed from
260 ;; dired-buffers.
261 (setq dir (file-name-as-directory dir))
262 (let ((alist dired-buffers) result elt)
263 (while alist
264 (setq elt (car alist))
265 ;; In Unix we only looked into the buffer when
266 ;; (dired-in-this-tree dir (car elt)) returned non-nil.
267 ;; In VMS we have to look into each buffer because it doesn't
268 ;; necessarily contain only the tree starting at the top level directory
269 (let ((buf (cdr elt)))
270 (if (buffer-name buf)
271 (if (assoc dir (save-excursion
272 (set-buffer buf)
273 dired-subdir-alist))
274 (setq result (cons buf result)))
275 ;; else buffer is killed - clean up:
276 (setq dired-buffers (delq elt dired-buffers))))
277 (setq alist (cdr alist)))
278 result))