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1 ;; dired-vms.el - VMS support for dired. Revision: 1.17
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2 ;; Copyright (C) 1990, 1992 Free Software Foundation, Inc.
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3
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4 ;; This file is part of XEmacs.
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5
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6 ;; XEmacs is free software; you can redistribute it and/or modify it
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7 ;; under the terms of the GNU General Public License as published by
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8 ;; the Free Software Foundation; either version 2, or (at your option)
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9 ;; any later version.
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10
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11 ;; XEmacs is distributed in the hope that it will be useful, but
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12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ;; General Public License for more details.
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15
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16 ;; You should have received a copy of the GNU General Public License
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16
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17 ;; along with XEmacs; see the file COPYING. If not, write to the
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18 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 ;; Boston, MA 02111-1307, USA.
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20
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21 ;; Id: dired-vms.el,v 1.17 1991/09/09 16:54:03 sk RelBeta
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22
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23 ;; You'll need vmsproc.el for this function:
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24 (autoload 'subprocess-command-to-buffer "vmsproc")
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25
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26 (setq dired-subdir-regexp "^ *Directory \\([][:.A-Z-0-9_$;<>]+\\)\\(\\)[\n\r]")
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27
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28 (defconst dired-vms-filename-regexp
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29 "\\(\\([_A-Z0-9$]?\\|[_A-Z0-9$][_A-Z0-9$---]*\\)\\.[_A-Z0-9$---]*;+[0-9]*\\)"
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30 "Regular expression to match for a valid VMS file name in Dired buffer.
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31 Stupid freaking bug! Position of _ and $ shouldn't matter but they do.
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32 Having [A-Z0-9$_] bombs on filename _$$CHANGE_LOG$.TXT$ and $CHANGE_LOG$.TX
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33 Other orders of $ and _ seem to all work just fine.")
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34
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35 (setq dired-re-mark "^[^ \n\t]")
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36
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37 (defvar dired-directory-command
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38 "DIRECTORY/SIZE/DATE/PROT"
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39 "Directory command for dired under VMS.")
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40
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41 ;; requires vmsproc.el to work
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42 (defun dired-ls (file switches &optional wildcard full-directory-p)
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43 "Insert ls output of FILE,formatted according to SWITCHES.
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44 Optional third arg WILDCARD means treat FILE as shell wildcard.
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45 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
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46 switches do not contain `d'.
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47
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48 SWITCHES default to dired-listing-switches.
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49
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50 This is the VMS version of this UNIX command.
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51 The SWITCHES and WILDCARD arguments are ignored.
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52 Uses dired-directory-command."
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53 (save-restriction;; Must drag point along:
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54 (narrow-to-region (point) (point))
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55 (subprocess-command-to-buffer
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56 (concat dired-directory-command " " file)
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57 (current-buffer))
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58 (if full-directory-p
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59 (goto-char (point-max))
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60 ;; Just the file line if no full directory required:
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61 (goto-char (point-min))
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62 (let ((case-fold-search nil))
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63 (re-search-forward dired-subdir-regexp)
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64 (re-search-forward (concat "^" dired-vms-filename-regexp)))
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65 (beginning-of-line)
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66 (delete-region (point-min) (point))
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67 (forward-line 1)
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68 (delete-region (point) (point-max)))))
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69
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70 (defun dired-insert-headerline (dir) ; redefinition
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71 ;; VMS dired-ls makes its own headerline, but we must position the
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72 ;; cursor where dired-insert-subdir expects it.
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73 ;; This does not check whether the headerline matches DIR.
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74 (re-search-forward dired-subdir-regexp)
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75 (goto-char (match-end 1)))
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76
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77
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78 (defun dired-make-absolute (file &optional dir)
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79 ;;"Convert FILE (a pathname relative to DIR) to an absolute pathname."
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80 ;; This should be good enough for ange-ftp, but might easily be
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81 ;; redefined (for VMS?).
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82 ;; It should be reasonably fast, though, as it is called in
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83 ;; dired-get-filename.
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84 (concat (or dir
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85 (dired-current-directory)
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86 default-directory)
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87 file))
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88
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89 (defun dired-make-relative (file &optional dir)
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90 ;; In VMS we don't want relative names at all because of search path
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91 ;; logical names. Also, we never need to raise an error when a file
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92 ;; `doesn't belong' in this buffer (like in the Unix case).
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93 file)
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94
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95 (defun dired-in-this-tree (file dir)
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96 ;;"Is FILE part of the directory tree starting at DIR?"
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97 ;; Under VMS, file="DEV:[foo.bar]zod", dir="DEV:[foo]"
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98 (or (string= (substring dir -1) "\]")
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99 (string= (substring dir -1) "\:")
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100 (error "Not a directory: %s" dir))
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101 (string-match (concat "^" (regexp-quote (substring dir 0 -1)))
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102 file))
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103
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104 (defun dired-vms-split-filename (file)
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105 (if (string-match;; "DEV:[DIR]FIL" \1=DEV \2=DIR \3=FIL
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106 "^\\([.A-Z-0-9_$;]*\\):?[[<]\\([.A-Z-0-9_$;]*\\)[]>]\\([.A-Z-0-9_$;]*\\)$"
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107 file)
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108 (mapcar '(lambda (x)
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109 (substring file (match-beginning x) (match-end x)))
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110 '(1 2 3))))
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111
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112 ;; Must use this in dired-noselect instead of expand-file-name and
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113 ;; file-name-as-directory
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114 ;; Taken from the VMS dired version by
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115 ;;Roland Roberts BITNET: roberts@uornsrl
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116 ;; Nuclear Structure Research Lab INTERNET: rbr4@uhura.cc.rochester.edu
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117 ;; 271 East River Road UUCP: rochester!ur-cc!uhura!rbr4
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118 ;; Rochester, NY 14267 AT&T: (716) 275-8962
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119
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120
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121 (defun dired-noselect (dirname &optional switches)
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122 "Like M-x dired but returns the dired buffer as value, does not select it."
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123 (setq dirname (dired-fix-directory dirname))
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124 (dired-internal-noselect dirname switches))
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125
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126 (defun dired-fix-directory (dirname)
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127 "Fix up dirname to be a valid directory name and return it"
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128 (setq dirname
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129 (expand-file-name (or dirname (setq dirname default-directory))))
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130 (let ((end (1- (length dirname)))
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131 bracket colon)
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132 (if (or (char-equal ?\] (elt dirname end))
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133 (char-equal ?\: (elt dirname end)))
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134 dirname
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135 (setq bracket (string-match "\\]" dirname))
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136 (setq colon (string-match "\\:" dirname))
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137 (setq end (string-match "\\.DIR" dirname (or bracket colon)))
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138 (if end
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139 (let ((newdir
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140 (if bracket (concat (substring dirname 0 bracket)
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141 ".")
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142 (if colon (concat (substring dirname 0 (1+ colon))
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143 "[")
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144 "["))))
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145 (concat newdir (substring dirname
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146 (1+ (or bracket colon)) end)
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147 "]"))
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148 (if bracket (substring dirname 0 (1+ bracket))
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149 (if colon (substring dirname 0 (1+ colon))
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150 default-directory))))))
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151
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152 ;; Versions are not yet supported in dired.el (as of version 4.53):
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153 ;;(setq dired-file-version-regexp "[.;][0-9]+$")
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154
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155 (defun dired-move-to-filename (&optional raise-error eol)
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156 "In dired, move to first char of filename on this line.
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157 Returns position (point) or nil if no filename on this line."
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158 ;; This is the VMS version.
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159 (or eol (setq eol (progn (end-of-line) (point))))
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160 (beginning-of-line)
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161 (if (re-search-forward (concat " " dired-vms-filename-regexp) eol t)
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162 (goto-char (match-beginning 1))
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163 (if raise-error
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164 (error "No file on this line")
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165 nil)))
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166
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167 (defun dired-move-to-end-of-filename (&optional no-error eol)
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168 ;; Assumes point is at beginning of filename,
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169 ;; thus the rwx bit re-search-backward below will succeed in *this* line.
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170 ;; So, it should be called only after (dired-move-to-filename t).
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171 ;; case-fold-search must be nil, at least for VMS.
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172 ;; On failure, signals an error or returns nil.
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173 ;; This is the VMS version.
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174 (let (opoint flag ex sym hidden case-fold-search)
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175 (setq opoint (point))
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176 (or eol (setq eol (save-excursion (end-of-line) (point))))
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177 (setq hidden (and selective-display
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178 (save-excursion (search-forward "\r" eol t))))
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179 (if hidden
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180 nil
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181 (re-search-forward dired-vms-filename-regexp eol t))
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182 (or no-error
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183 (not (eq opoint (point)))
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184 (error (if hidden
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185 (substitute-command-keys
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186 "File line is hidden, type \\[dired-hide-subdir] to unhide")
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187 "No file on this line")))
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188 (if (eq opoint (point))
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189 nil
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190 (point))))
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191
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192 (defun dired-tree-lessp (dir1 dir2)
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193 (setq dir1 (substring (file-name-as-directory dir1) 0 -1)
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194 dir2 (substring (file-name-as-directory dir2) 0 -1))
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195 (let ((components-1 (dired-split "[:.]" dir1))
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196 (components-2 (dired-split "[:.]" dir2)))
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197 (while (and components-1
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198 components-2
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199 (equal (car components-1) (car components-2)))
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200 (setq components-1 (cdr components-1)
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201 components-2 (cdr components-2)))
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202 (let ((c1 (car components-1))
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203 (c2 (car components-2)))
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204
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205 (cond ((and c1 c2)
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206 (string-lessp c1 c2))
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207 ((and (null c1) (null c2))
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208 nil) ; they are equal, not lessp
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209 ((null c1) ; c2 is a subdir of c1: c1<c2
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210 t)
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211 ((null c2) ; c1 is a subdir of c2: c1>c2
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212 nil)
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213 (t (error "This can't happen"))))))
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214
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215 (defun dired-insert-subdir-validate (dirname)
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216 (let ((alist dired-subdir-alist)
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217 (found nil)
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218 item)
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219 (while (and alist (not found))
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220 (setq item (car alist)
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221 alist (cdr alist))
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222 (setq found (dired-in-this-tree dirname (car item))))
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223 (if (not found)
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224 (error "%s: directory not in this buffer" dirname))))
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225
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226 (defun dired-insert-subdir-newpos (new-dir)
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227 ;; Find pos for new subdir, according to tree order.
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228 (let ((alist (reverse dired-subdir-alist)) elt dir pos new-pos found)
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229 (while alist
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230 (setq elt (car alist)
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231 alist (cdr alist)
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232 dir (car elt)
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233 pos (dired-get-subdir-min elt))
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234 (if (or (and found
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235 (or (dired-in-this-tree dir found)
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236 (setq alist nil)))
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237 (and (dired-in-this-tree new-dir dir)
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238 (setq found dir)))
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239 (if (dired-tree-lessp dir new-dir)
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240 ;; Insert NEW-DIR after DIR
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241 (setq new-pos (dired-get-subdir-max elt)))))
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242 (goto-char new-pos))
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243 ;; want a separating newline between subdirs
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244 (or (eobp)
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245 (forward-line -1))
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246 (insert "\n")
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247 (point))
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248
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249 (defun dired-between-files ()
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250 (save-excursion
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251 (beginning-of-line)
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252 (or (equal (following-char) 9)
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253 (progn (forward-char 2)
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254 (or (looking-at "Total of")
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255 (equal (following-char) 32))))))
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256
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257 (defun dired-buffers-for-dir (dir)
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258 ;; Return a list of buffers that dired DIR (top level or in-situ subdir).
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259 ;; The list is in reverse order of buffer creation, most recent last.
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260 ;; As a side effect, killed dired buffers for DIR are removed from
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261 ;; dired-buffers.
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262 (setq dir (file-name-as-directory dir))
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263 (let ((alist dired-buffers) result elt)
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264 (while alist
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265 (setq elt (car alist))
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266 ;; In Unix we only looked into the buffer when
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267 ;; (dired-in-this-tree dir (car elt)) returned non-nil.
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268 ;; In VMS we have to look into each buffer because it doesn't
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269 ;; necessarily contain only the tree starting at the top level directory
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270 (let ((buf (cdr elt)))
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271 (if (buffer-name buf)
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272 (if (assoc dir (save-excursion
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273 (set-buffer buf)
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274 dired-subdir-alist))
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275 (setq result (cons buf result)))
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276 ;; else buffer is killed - clean up:
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277 (setq dired-buffers (delq elt dired-buffers))))
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278 (setq alist (cdr alist)))
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279 result))
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