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Import from CVS: tag r19-14
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date Mon, 13 Aug 2007 08:45:50 +0200
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1 ;;; rmailsort.el --- Rmail: sort messages.
2
3 ;; Copyright (C) 1990, 1993 Free Software Foundation, Inc.
4
5 ;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp>
6 ;; Version: !Header: /home/fsf/rms/e19/lisp/RCS/rmailsort.el,v 1.16 1993/11/24 08:08:56 rms Exp !
7 ;; Keywords: mail
8
9 ;; This file is part of XEmacs.
10
11 ;; XEmacs is free software; you can redistribute it and/or modify it
12 ;; under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
15
16 ;; XEmacs is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
20
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
23 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24
25 ;;; Code:
26
27 (require 'sort)
28
29 (autoload 'timezone-make-date-sortable "timezone")
30
31 ;; Sorting messages in Rmail buffer
32
33 (defun rmail-sort-by-date (reverse)
34 "Sort messages of current Rmail file by date.
35 If prefix argument REVERSE is non-nil, sort them in reverse order."
36 (interactive "P")
37 (rmail-sort-messages reverse
38 (function
39 (lambda (msg)
40 (rmail-make-date-sortable
41 (rmail-fetch-field msg "Date"))))))
42
43 (defun rmail-sort-by-subject (reverse)
44 "Sort messages of current Rmail file by subject.
45 If prefix argument REVERSE is non-nil, sort them in reverse order."
46 (interactive "P")
47 (rmail-sort-messages reverse
48 (function
49 (lambda (msg)
50 (let ((key (or (rmail-fetch-field msg "Subject") ""))
51 (case-fold-search t))
52 ;; Remove `Re:'
53 (if (string-match "^\\(re:[ \t]+\\)*" key)
54 (substring key (match-end 0)) key))))))
55
56 (defun rmail-sort-by-author (reverse)
57 "Sort messages of current Rmail file by author.
58 If prefix argument REVERSE is non-nil, sort them in reverse order."
59 (interactive "P")
60 (rmail-sort-messages reverse
61 (function
62 (lambda (msg)
63 (downcase ;Canonical name
64 (mail-strip-quoted-names
65 (or (rmail-fetch-field msg "From")
66 (rmail-fetch-field msg "Sender") "")))))))
67
68 (defun rmail-sort-by-recipient (reverse)
69 "Sort messages of current Rmail file by recipient.
70 If prefix argument REVERSE is non-nil, sort them in reverse order."
71 (interactive "P")
72 (rmail-sort-messages reverse
73 (function
74 (lambda (msg)
75 (downcase ;Canonical name
76 (mail-strip-quoted-names
77 (or (rmail-fetch-field msg "To")
78 (rmail-fetch-field msg "Apparently-To") "")
79 ))))))
80
81 (defun rmail-sort-by-correspondent (reverse)
82 "Sort messages of current Rmail file by other correspondent.
83 If prefix argument REVERSE is non-nil, sort them in reverse order."
84 (interactive "P")
85 (rmail-sort-messages reverse
86 (function
87 (lambda (msg)
88 (rmail-select-correspondent
89 msg
90 '("From" "Sender" "To" "Apparently-To"))))))
91
92 (defun rmail-select-correspondent (msg fields)
93 (let ((ans ""))
94 (while (and fields (string= ans ""))
95 (setq ans
96 (rmail-dont-reply-to
97 (mail-strip-quoted-names
98 (or (rmail-fetch-field msg (car fields)) ""))))
99 (setq fields (cdr fields)))
100 ans))
101
102 (defun rmail-sort-by-lines (reverse)
103 "Sort messages of current Rmail file by number of lines.
104 If prefix argument REVERSE is non-nil, sort them in reverse order."
105 (interactive "P")
106 (rmail-sort-messages reverse
107 (function
108 (lambda (msg)
109 (count-lines (rmail-msgbeg msgnum)
110 (rmail-msgend msgnum))))))
111
112 ;; Basic functions
113
114 (defun rmail-sort-messages (reverse keyfun)
115 "Sort messages of current Rmail file.
116 If 1st argument REVERSE is non-nil, sort them in reverse order.
117 2nd argument KEYFUN is called with a message number, and should return a key."
118 (save-excursion
119 ;; If we are in a summary buffer, operate on the Rmail buffer.
120 (if (eq major-mode 'rmail-summary-mode)
121 (set-buffer rmail-buffer))
122 (let ((buffer-read-only nil)
123 (predicate nil) ;< or string-lessp
124 (sort-lists nil))
125 (message "Finding sort keys...")
126 (widen)
127 (let ((msgnum 1))
128 (while (>= rmail-total-messages msgnum)
129 (setq sort-lists
130 (cons (list (funcall keyfun msgnum) ;Make sorting key
131 (eq rmail-current-message msgnum) ;True if current
132 (aref rmail-message-vector msgnum)
133 (aref rmail-message-vector (1+ msgnum)))
134 sort-lists))
135 (if (zerop (% msgnum 10))
136 (message "Finding sort keys...%d" msgnum))
137 (setq msgnum (1+ msgnum))))
138 (or reverse (setq sort-lists (nreverse sort-lists)))
139 ;; Decide predicate: < or string-lessp
140 (if (numberp (car (car sort-lists))) ;Is a key numeric?
141 (setq predicate (function <))
142 (setq predicate (function string-lessp)))
143 (setq sort-lists
144 (sort sort-lists
145 (function
146 (lambda (a b)
147 (funcall predicate (car a) (car b))))))
148 (if reverse (setq sort-lists (nreverse sort-lists)))
149 ;; Now we enter critical region. So, keyboard quit is disabled.
150 (message "Reordering messages...")
151 (let ((inhibit-quit t) ;Inhibit quit
152 (current-message nil)
153 (msgnum 1)
154 (msginfo nil))
155 ;; There's little hope that we can easily undo after that.
156 (buffer-disable-undo (current-buffer))
157 (goto-char (rmail-msgbeg 1))
158 ;; To force update of all markers.
159 (insert-before-markers ?Z)
160 (backward-char 1)
161 ;; Now reorder messages.
162 (while sort-lists
163 (setq msginfo (car sort-lists))
164 ;; Swap two messages.
165 (insert-buffer-substring
166 (current-buffer) (nth 2 msginfo) (nth 3 msginfo))
167 (delete-region (nth 2 msginfo) (nth 3 msginfo))
168 ;; Is current message?
169 (if (nth 1 msginfo)
170 (setq current-message msgnum))
171 (setq sort-lists (cdr sort-lists))
172 (if (zerop (% msgnum 10))
173 (message "Reordering messages...%d" msgnum))
174 (setq msgnum (1+ msgnum)))
175 ;; Delete the garbage inserted before.
176 (delete-char 1)
177 (setq quit-flag nil)
178 (buffer-enable-undo)
179 (rmail-set-message-counters)
180 (rmail-show-message current-message)))))
181
182 (defun rmail-fetch-field (msg field)
183 "Return the value of the header FIELD of MSG.
184 Arguments are MSG and FIELD."
185 (save-restriction
186 (widen)
187 (let ((next (rmail-msgend msg)))
188 (goto-char (rmail-msgbeg msg))
189 (narrow-to-region (if (search-forward "\n*** EOOH ***\n" next t)
190 (point)
191 (forward-line 1)
192 (point))
193 (progn (search-forward "\n\n" nil t) (point)))
194 (mail-fetch-field field))))
195
196 (defun rmail-make-date-sortable (date)
197 "Make DATE sortable using the function string-lessp."
198 ;; Assume the default time zone is GMT.
199 (timezone-make-date-sortable date "GMT" "GMT"))
200
201 (provide 'rmailsort)
202
203 ;;; rmailsort.el ends here