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1 ;;; -*- Mode:Emacs-Lisp -*-
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2 ;;; Jamie Zawinski <jwz@lucid.com> 7-may-91
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3 ;;;
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4 ;;; This makes dired buffers which display multiple directories display
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5 ;;; them in a tree rather than in an "ls -R"-like format. Which, as every
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6 ;;; Lisp Machine hacker knows, is the Right Thing!
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7 ;;;
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8 ;;; -rw-r--r-- 1 jwz 31543 Mar 26 03:20 reportmail.el
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9 ;;; -rw-r--r-- 1 jwz 14919 Mar 26 03:20 reportmail.elc
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10 ;;; drwxr-xr-x 2 jwz 1024 Apr 5 13:08 sk-dired/
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11 ;;; -rw-r--r-- 1 jwz 3258 Mar 6 06:33 ange-ftp-dired.el
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12 ;;; -rw-r--r-- 1 jwz 1750 Mar 12 15:04 ange-ftp-dired.elc
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13 ;;; -rw-r--r-- 1 jwz 3151 Mar 29 00:01 symbol-syntax.el
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14 ;;; -rw-r--r-- 1 jwz 1504 Mar 29 01:01 symbol-syntax.elc
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15
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16 ;;; This program is free software; you can redistribute it and/or modify
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17 ;;; it under the terms of the GNU General Public License as published by
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18 ;;; the Free Software Foundation; either version 2, or (at your option)
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19 ;;; any later version.
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20 ;;;
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21 ;;; This program is distributed in the hope that it will be useful,
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22 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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23 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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24 ;;; GNU General Public License for more details.
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25 ;;;
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26 ;;; A copy of the GNU General Public License can be obtained from this
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27 ;;; program's author (send electronic mail to the above address) or from
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28 ;;; Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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29
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30 (defconst dired-subdir-alist nil
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31 "Association list of subdirectories and their buffer positions:
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32
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33 ((LASTDIR STARTMARKER ENDMARKER NESTING-DEPTH)
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34 ...
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35 (DEFAULT-DIRECTORY POINTMIN POINTMAX 0)).
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36 "
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37 ;;The markers point right at the end of the line, so that the cursor
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38 ;;looks at either \\n or \\r, the latter for a hidden subdir.
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39 ;; The directories must be file-name-as-directory, of course.
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40 )
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41
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42 (defun dired-simple-subdir-alist ()
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43 ;; Build and return `dired-subdir-alist' assuming just the top level
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44 ;; directory to be inserted. Don't parse the buffer.
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45 (set (make-local-variable 'dired-subdir-alist)
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46 (list (list default-directory
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47 (point-min-marker) (point-max-marker) 0))))
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48
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49 (define-key dired-mode-map "i" 'dired-insert-subdir-inline)
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50 (define-key dired-mode-map "j" 'dired-maybe-insert-subdir)
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51
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52 ;;; ## these should be macros when this is integrated with the distribution.
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53 (defun dired-get-subdir-min (elt) (nth 1 elt))
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54 (defun dired-get-subdir-max (elt) (nth 2 elt))
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55
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56 (defun dired-subdir-min ()
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57 (let ((d (dired-current-directory))
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58 c)
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59 (if (setq c (assoc d dired-subdir-alist))
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60 (marker-position (dired-get-subdir-min c))
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61 (error "not in a subdir!"))))
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62
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63 (defun dired-subdir-max ()
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64 (let ((d (dired-current-directory))
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65 c)
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66 (if (setq c (assoc d dired-subdir-alist))
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67 (marker-position (dired-get-subdir-max c))
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68 (point-max))))
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69
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70 (defun dired-clear-alist ()
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71 (while dired-subdir-alist
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72 (let ((elt (car dired-subdir-alist)))
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73 (set-marker (nth 1 elt) nil)
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74 (set-marker (nth 2 elt) nil))
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75 (setq dired-subdir-alist (cdr dired-subdir-alist))))
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76
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77 (defun dired-unsubdir (dir)
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78 ;; Remove DIR from the alist.
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79 ;; also remove any directories which are inside of it.
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80 (let* ((elt (assoc dir dired-subdir-alist))
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81 (min (nth 1 elt))
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82 (max (nth 2 elt))
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83 other-elt
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84 (rest dired-subdir-alist))
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85 (while rest
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86 (setq other-elt (car rest))
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87 (if (and (<= min (nth 1 other-elt))
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88 (>= max (nth 2 other-elt)))
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89 (setq dired-subdir-alist (delq other-elt dired-subdir-alist)))
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90 (setq rest (cdr rest)))))
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91
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92 ;;; this needs to be changed to grok indentation. Or not. -jwz
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93 ;;; Probably not, as dired-revert either starts with one dir and inserting
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94 ;;; then enlarges the alist automatically, or it inserts all dirs with
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95 ;;; one "ls -lR". -sk
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96 (defun dired-build-subdir-alist ()
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97 "Build dired-subdir-alist by parsing the buffer and return it's new value."
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98 (interactive)
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99 (dired-clear-alist)
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100 (save-excursion
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101 (let ((count 0))
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102 (goto-char (point-min))
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103 (setq dired-subdir-alist nil)
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104 (while (re-search-forward dired-subdir-regexp nil t)
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105 (setq count (1+ count))
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106 (dired-alist-add (buffer-substring (match-beginning 1)
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107 (match-end 1))
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108 ;; Put subdir boundary between lines:
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109 (save-excursion
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110 (goto-char (match-beginning 0))
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111 (beginning-of-line)
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112 (point-marker))
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113 ;; isn't this wrong when already more than one
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114 ;; subdir is present with -lR?
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115 ;; maybe. I don't know. But we can't call
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116 ;; dired-subdir-max here, it loops. -jwz.
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117 (point-max-marker)
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118 0)
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119 (message "%d" count))
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120 (message "%d director%s." count (if (= 1 count) "y" "ies"))
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121 ;; return new alist:
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122 dired-subdir-alist)))
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123
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124 (defun dired-alist-add (dir start-marker end-marker indentation-depth)
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125 ;; indentation-depth may be 0 for more than one directory -- this happens
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126 ;; when "ls -R" format is used.
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127 ;; ## debugging code
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128 (or start-marker (error "start marker nil"))
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129 (or end-marker (error "end marker nil"))
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130 ;;(or (/= start-marker end-marker) (error "markers are the same"))
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131 (let ((old (assoc dir dired-subdir-alist)))
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132 (setq dired-subdir-alist
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133 (cons (list (dired-normalize-subdir dir)
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134 start-marker end-marker
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135 (or indentation-depth 0))
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136 (delq old dired-subdir-alist)))
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137 (dired-alist-sort)))
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138
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139 ;; can't see at the moment how this could work with a mixed format
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140 ;; alist -sk
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141 (defun dired-current-directory (&optional relative)
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142 "Get the subdirectory to which this line belongs.
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143 This returns a string with trailing slash, like default-directory.
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144 Optional argument means return a name relative to default-directory."
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145 (let (elt
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146 (here (point))
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147 (alist (or dired-subdir-alist (dired-build-subdir-alist)))
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148 best-so-far)
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149 (while alist
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150 (setq elt (car alist))
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151 (if (or (< here (nth 1 elt))
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152 (> here (nth 2 elt)))
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153 nil ;; the subdir is disjoint
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154 ;; otherwise it's on the path between the current file and the root.
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155 ;; decide if it's deeper than what we've already got.
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156 (if (or (null best-so-far)
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157 (< (- (nth 2 elt) (nth 1 elt))
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158 (- (nth 2 best-so-far) (nth 1 best-so-far))))
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159 (setq best-so-far elt)))
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160 (setq alist (cdr alist)))
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161 (if best-so-far
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162 (if relative
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163 (dired-make-relative (car best-so-far) default-directory)
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164 (car best-so-far))
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165 (progn
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166 (dired-build-subdir-alist)
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167 (dired-current-directory relative)))))
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168
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169 (defun dired-insert-subdir-del (element)
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170 ;; Erase an already present subdir (given by ELEMENT) from buffer.
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171 ;; Move to that buffer position. Return a mark-alist.
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172 (let ((begin-marker (dired-get-subdir-min element))
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173 (end-marker (dired-get-subdir-max element)))
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174 (goto-char end-marker)
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175 (or (eobp)
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176 (not (= 0 (nth 3 element)))
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177 ;; for -R style, want a separating newline _between_ subdirs.
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178 (forward-char -1))
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179 (if (= 0 (nth 3 element))
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180 (insert "\n\n"))
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181 (prog1
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182 (dired-remember-marks begin-marker (point))
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183 (delete-region begin-marker (point)))))
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184
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185
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186 (defun dired-insert-subdir-doupdate (dirname elt beg-end)
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187 (let ((beg (nth 0 beg-end))
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188 (end (nth 1 beg-end))
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189 (indent (or (nth 2 beg-end) 0)))
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190 (if (and elt
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191 (not (eq indent (nth 2 elt))))
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192 (setq elt nil
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193 dired-subdir-alist (delq elt dired-subdir-alist)))
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194 (if elt
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195 (let ((old-start (nth 1 elt))
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196 (old-end (nth 2 elt)))
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197 (set-marker old-start beg)
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198 (set-marker old-end end)
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199 (setcar (nthcdr 3 elt) indent))
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200 (dired-alist-add dirname
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201 (set-marker (make-marker) beg)
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202 (set-marker (make-marker) end)
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203 indent))))
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204
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205 (defun dired-insert-subdir-inline (dirname &optional switches no-error-if-not-dir-p)
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206 "Insert this subdirectory into the same dired buffer.
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207 If it is already present, overwrites previous entry,
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208 else inserts it, indented, within its parent's listing.
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209 With a prefix arg, you may edit the ls switches used for this listing.
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210 This command ignores the `R' switch."
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211 ;; NO-ERROR-IF-NOT-DIR-P needed for special filesystems like
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212 ;; Prospero where dired-ls does the right thing, but
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213 ;; file-directory-p has not been redefined.
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214 (interactive
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215 (list (dired-get-filename)
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216 (if current-prefix-arg
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217 (read-string "Switches for listing: " dired-actual-switches))))
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218 (setq dirname (file-name-as-directory (expand-file-name dirname)))
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219 (if (let ((case-fold-search nil))
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220 (string-match "R" (or switches "")))
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221 (setq switches (concat (substring switches 0 (match-beginning 0))
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222 (substring switches (match-end 0)))))
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223 (dired-make-relative dirname default-directory) ; error on failure
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224 (or no-error-if-not-dir-p
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225 (file-directory-p dirname)
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226 (error "Attempt to insert a non-directory: %s" dirname))
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227 (let ((elt (assoc dirname dired-subdir-alist))
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228 (parentdir (file-name-directory (directory-file-name dirname)))
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229 beg end old-start old-end new-start new-end
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230 mark-alist
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231 tail-adjascents
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232 buffer-read-only case-fold-search)
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233 (if elt
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234 ;; subdir is already present - must first erase it from buffer.
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235 ;; if it's already in -R format, pretend it wasn't there, but
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236 ;; remember its file marks.
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237 (progn
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238 (setq mark-alist
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239 (append (dired-insert-subdir-del elt) mark-alist))
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240 (setq dired-subdir-alist
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241 (delq elt dired-subdir-alist))))
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242 ;;(dired-insert-subdir-newpos) ;##
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243 (dired-goto-file dirname)
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244 (forward-line 1)
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245 (dired-insert-subdir-doupdate
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246 dirname elt (dired-insert-subdir-inline-doinsert dirname switches parentdir))
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247 (dired-initial-position dirname)
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248 (save-excursion (dired-mark-remembered mark-alist)))
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249 (dired-nuke-extra-newlines)
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250 )
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251
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252
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253 (defun dired-insert-subdir (dirname &optional switches no-error-if-not-dir-p)
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254 "Insert this subdirectory into the same dired buffer.
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255 If it is already present, overwrites previous entry,
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256 else appends at end of buffer.
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257 With a prefix arg, you may edit the ls switches used for this listing.
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258 You can add `R' to the switches to expand the whole tree starting at
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259 this subdirectory.
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260 This function takes some pains to conform to ls -lR output."
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261 ;; NO-ERROR-IF-NOT-DIR-P needed for special filesystems like
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262 ;; Prospero where dired-ls does the right thing, but
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263 ;; file-directory-p has not been redefined.
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264 (interactive
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265 (list (dired-get-filename)
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266 (if current-prefix-arg
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267 (read-string "Switches for listing: " dired-actual-switches))))
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268 (setq dirname (file-name-as-directory (expand-file-name dirname)))
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269 (dired-make-relative dirname default-directory) ; error on failure
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270 (or no-error-if-not-dir-p
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271 (file-directory-p dirname)
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272 (error "Attempt to insert a non-directory: %s" dirname))
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273 (let ((elt (assoc dirname dired-subdir-alist))
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274 (switches-have-R (and switches (string-match "R" switches)))
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275 mark-alist
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276 buffer-read-only case-fold-search)
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277 (if switches-have-R ; avoid double subdirs
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278 (setq mark-alist (dired-kill-tree dirname t)))
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279 (let ((was-nested (and (nth 3 elt) (not (eq 0 (nth 3 elt))))))
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280 (if elt ; subdir is already present
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281 (setq mark-alist ; remove it, remembering marks
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282 (append (dired-insert-subdir-del elt) mark-alist)))
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283 (if (or was-nested (null elt))
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284 (dired-insert-subdir-newpos dirname))
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285 (if was-nested (setcar (nthcdr 3 elt) 0)))
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286 (dired-insert-subdir-doupdate
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287 dirname elt (dired-insert-subdir-doinsert dirname switches))
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288 (if switches-have-R (dired-build-subdir-alist))
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289 (dired-initial-position dirname)
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290 (save-excursion (dired-mark-remembered mark-alist)))
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291 (dired-nuke-extra-newlines))
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292
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293 (defun dired-nuke-extra-newlines ()
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294 (let ((buffer-read-only nil))
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295 (save-excursion
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296 (goto-char (point-min))
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297 (while (re-search-forward "\n\n\n+" nil t)
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298 (goto-char (+ 2 (match-beginning 0)))
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299 (delete-region (point) (match-end 0))))))
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300
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301
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302 (defun dired-insert-subdir-newpos (new-dir)
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303 ;; Find pos for new subdir, according to tree order.
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304 ;;(goto-char (point-max))
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305 (let ((alist dired-subdir-alist) elt dir pos new-pos)
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306 (while alist
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307 (setq elt (car alist)
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308 alist (cdr alist)
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309 dir (car elt)
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310 pos (dired-get-subdir-min elt))
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311 (if (and (= 0 (nth 3 elt)) ; nested ones don't count.
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312 (dired-tree-lessp dir new-dir))
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313 ;; Insert NEW-DIR after DIR
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314 (setq new-pos (dired-get-subdir-max elt)
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315 alist nil)))
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316 (goto-char new-pos))
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317 ;; want a separating newline between subdirs
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318 (insert "\n\n")
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319 (point))
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320
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321
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322 (defvar dired-no-inline-headerlines t
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323 "*set this to t to suppress the directory header and `total' line.")
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324
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325
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326 (defun dired-insert-subdir-inline-doinsert (dirname switches parentdir)
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327 ;; Insert ls output after point and put point on the correct
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328 ;; position for the subdir alist.
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329 ;; returns the dired-subdir-alist entry.
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330 (let ((begin (point)) end
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331 indent
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332 tail-adjascents)
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333 (message "Reading directory %s..." dirname)
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334 (dired-ls dirname
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335 (or switches
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336 (dired-replace-in-string "R" "" dired-actual-switches))
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337 nil t)
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338 (message "Reading directory %s...done" dirname)
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339 (setq end (point))
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340 (setq indent (1+ (nth 3 (assoc parentdir dired-subdir-alist))))
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341
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342 (save-excursion
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343 (goto-char begin)
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344 (or dired-no-inline-headerlines
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345 (progn
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346 (dired-insert-headerline dirname)
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347 (save-excursion (delete-horizontal-space)))
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348 (goto-char begin)
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349 (delete-horizontal-space))
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350 (if (and dired-no-inline-headerlines
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351 (looking-at "^ *total [0-9]"))
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352 (progn
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353 (delete-region (point) (progn (forward-line 1) (point)))
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354 (setq begin (point)))))
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355 ;;
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356 ;; If there are other directories whose end-point is right here,
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357 ;; then they are the directories such that X is the last directory
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358 ;; in the listing of Y. We need to grab them and update their
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359 ;; last-point to be the same as ours will be (goofy margin-case).
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360 ;;
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361 (let ((rest dired-subdir-alist))
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362 (while rest
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363 (if (= (point) (nth 2 (car rest)))
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364 (setq tail-adjascents (cons (car rest) tail-adjascents)))
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365 (setq rest (cdr rest))))
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366 (let ((indent-tabs-mode nil))
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367 (indent-rigidly begin (point) (* 2 (1+ indent))))
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368 (setq end (point-marker))
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369 (goto-char begin)
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370 (while tail-adjascents
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371 (set-marker (nth 2 (car tail-adjascents)) end)
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372 (setq tail-adjascents (cdr tail-adjascents)))
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373 (if dired-after-readin-hook
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374 (save-restriction
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375 (narrow-to-region begin end)
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376 (run-hooks 'dired-after-readin-hook)))
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377 ;; call dired-insert-headerline afterwards, as under VMS dired-ls
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378 ;; does insert the headerline itself and the insert function just
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379 ;; moves point.
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380 (setq end (prog1 (marker-position end) (set-marker end nil)))
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381 (goto-char begin)
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382 (list begin end indent)))
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383
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384
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385 (defun dired-insert-subdir-doinsert (dirname switches)
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386 ;; Insert ls output after point and put point on the correct
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387 ;; position for the subdir alist.
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388 ;; Return the boundary of the inserted text (as list of BEG and END).
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389 (let ((begin (point)) end)
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390 (message "Reading directory %s..." dirname)
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391 (dired-ls dirname
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392 (or switches
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393 (dired-replace-in-string "R" "" dired-actual-switches))
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394 nil t)
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395 (message "Reading directory %s...done" dirname)
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396 (insert "\n\n")
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397 (setq end (point-marker))
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398 (indent-rigidly begin (point) 2)
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399 (if dired-after-readin-hook
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400 (save-restriction
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401 (narrow-to-region begin (point))
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402 (run-hooks 'dired-after-readin-hook)))
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403 ;; call dired-insert-headerline afterwards, as under VMS dired-ls
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404 ;; does insert the headerline itself and the insert function just
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405 ;; moves point.
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406 (goto-char begin)
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407 (dired-insert-headerline dirname)
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408 ;; point is now like in dired-build-subdir-alist
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409 (setq end (prog1 (marker-position end) (set-marker end nil)))
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410 (list begin end)))
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411
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412
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413 (defun dired-insert-old-subdirs (old-subdir-alist)
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414 ;; Try to insert all subdirs that were displayed before
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415 (or (string-match "R" dired-actual-switches)
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416 (let (elt dir)
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417 (setq old-subdir-alist (sort old-subdir-alist
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418 (function (lambda (x y)
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419 (< (nth 3 x) (nth 3 y))))))
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420 (while old-subdir-alist
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421 (setq elt (car old-subdir-alist)
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422 old-subdir-alist (cdr old-subdir-alist)
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423 dir (car elt))
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424 (condition-case ()
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425 (if (= 0 (nth 3 elt))
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426 (dired-insert-subdir dir)
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427 (dired-insert-subdir-inline dir))
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428 (error nil))))))
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429
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430 (defun dired-add-entry-do-indentation (marker-char)
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431 ;; two spaces or a marker plus a space, plus nesting indentation.
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432 ;; Uses fluid vars `directory', `marker-char' from dired-add-entry
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433 (insert (if marker-char
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434 (if (integerp marker-char) marker-char dired-marker-char)
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435 ?\040)
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436 ?\040)
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437 (let ((indent (nth 3 (assoc directory dired-subdir-alist))))
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438 (insert (make-string (* 2 indent) ?\040))))
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