code.delx.au - gnu-emacs/blob - lisp/mail/rmailsort.el

   1 ;;; Rmail: sort messages.
   2 ;; Copyright (C) 1990 Masanobu UMEDA
   3 ;; umerin@tc.Nagasaki.GO.JP?
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is distributed in the hope that it will be useful,
   8 ;; but WITHOUT ANY WARRANTY.  No author or distributor
   9 ;; accepts responsibility to anyone for the consequences of using it
  10 ;; or for whether it serves any particular purpose or works at all,
  11 ;; unless he says so in writing.  Refer to the GNU Emacs General Public
  12 ;; License for full details.
  13
  14 ;; Everyone is granted permission to copy, modify and redistribute
  15 ;; GNU Emacs, but only under the conditions described in the
  16 ;; GNU Emacs General Public License.   A copy of this license is
  17 ;; supposed to have been given to you along with GNU Emacs so you
  18 ;; can know your rights and responsibilities.  It should be in a
  19 ;; file named COPYING.  Among other things, the copyright notice
  20 ;; and this notice must be preserved on all copies.
  21
  22 (provide 'rmailsort)
  23 (require 'rmail)
  24 (require 'sort)
  25
  26 ;; GNUS compatible key bindings.
  27 (define-key rmail-mode-map "\C-c\C-s\C-d" 'rmail-sort-by-date)
  28 (define-key rmail-mode-map "\C-c\C-s\C-s" 'rmail-sort-by-subject)
  29 (define-key rmail-mode-map "\C-c\C-s\C-a" 'rmail-sort-by-author)
  30 (define-key rmail-mode-map "\C-c\C-s\C-r" 'rmail-sort-by-recipient)
  31 (define-key rmail-mode-map "\C-c\C-s\C-c" 'rmail-sort-by-correspondent)
  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-sortable-date-string
  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                           (mail-strip-quoted-names
  64                            (or (rmail-fetch-field msg "From")
  65                                (rmail-fetch-field msg "Sender") ""))))))
  66
  67 (defun rmail-sort-by-recipient (reverse)
  68   "Sort messages of current Rmail file by recipient.
  69 If prefix argument REVERSE is non-nil, sort them in reverse order."
  70   (interactive "P")
  71   (rmail-sort-messages reverse
  72                        (function
  73                         (lambda (msg)
  74                           (mail-strip-quoted-names
  75                            (or (rmail-fetch-field msg "To")
  76                                (rmail-fetch-field msg "Apparently-To") "")
  77                            )))))
  78
  79 (defun rmail-sort-by-correspondent (reverse)
  80   "Sort messages of current Rmail file by other correspondent.
  81 If prefix argument REVERSE is non-nil, sort them in reverse order."
  82   (interactive "P")
  83   (rmail-sort-messages reverse
  84                        (function
  85                         (lambda (msg)
  86                           (rmail-select-correspondent
  87                            msg
  88                            '("From" "Sender" "To" "Apparently-To"))))))
  89
  90 (defun rmail-select-correspondent (msg fields)
  91   (let ((ans ""))
  92    (while (and fields (string= ans ""))
  93      (setq ans
  94            (rmail-dont-reply-to
  95             (mail-strip-quoted-names
  96              (or (rmail-fetch-field msg (car fields)) ""))))
  97      (setq fields (cdr fields)))
  98    ans))
  99 \f
 100
 101 (defun rmail-sort-messages (reverse keyfunc)
 102   "Sort messages of current Rmail file.
 103 1st argument REVERSE is non-nil, sort them in reverse order.
 104 2nd argument KEYFUNC is called with message number, and should return a key."
 105   (let ((buffer-read-only nil)
 106         (sort-lists nil))
 107     (message "Finding sort keys...")
 108     (widen)
 109     (let ((msgnum 1))
 110       (while (>= rmail-total-messages msgnum)
 111         (setq sort-lists
 112               (cons (cons (funcall keyfunc msgnum) ;A sort key.
 113                           (buffer-substring
 114                            (rmail-msgbeg msgnum) (rmail-msgend msgnum)))
 115                     sort-lists))
 116         (setq msgnum (1+ msgnum))))
 117     (or reverse (setq sort-lists (nreverse sort-lists)))
 118     (setq sort-lists
 119           (sort sort-lists
 120                 (function
 121                  (lambda (a b)
 122                    (string-lessp (car a) (car b))))))
 123     (if reverse (setq sort-lists (nreverse sort-lists)))
 124     (message "Reordering buffer...")
 125     (delete-region (rmail-msgbeg 1) (rmail-msgend rmail-total-messages))
 126     (while sort-lists
 127       (insert (cdr (car sort-lists)))
 128       (setq sort-lists (cdr sort-lists)))
 129     (rmail-set-message-counters)
 130     (rmail-show-message)
 131     ))
 132
 133 (defun rmail-fetch-field (msg field)
 134   "Return the value of the header field FIELD of MSG.
 135 Arguments are MSG and FIELD."
 136   (let ((next (rmail-msgend msg)))
 137     (save-restriction
 138       (goto-char (rmail-msgbeg msg))
 139       (narrow-to-region (if (search-forward "\n*** EOOH ***\n" next t)
 140                             (point)
 141                           (forward-line 1)
 142                           (point))
 143                         (progn (search-forward "\n\n" nil t) (point)))
 144       (mail-fetch-field field))))
 145
 146 ;; Copy of the function gnus-comparable-date in gnus.el
 147
 148 (defun rmail-sortable-date-string (date)
 149   "Make sortable string by string-lessp from DATE."
 150   (let ((month '(("JAN" . " 1")("FEB" . " 2")("MAR" . " 3")
 151                  ("APR" . " 4")("MAY" . " 5")("JUN" . " 6")
 152                  ("JUL" . " 7")("AUG" . " 8")("SEP" . " 9")
 153                  ("OCT" . "10")("NOV" . "11")("DEC" . "12")))
 154         (date (or date "")))
 155     ;; Can understand the following styles:
 156     ;; (1) 14 Apr 89 03:20:12 GMT
 157     ;; (2) Fri, 17 Mar 89 4:01:33 GMT
 158     (if (string-match
 159          "\\([0-9]+\\) +\\([^ ,]+\\) +\\([0-9]+\\) +\\([0-9:]+\\)" date)
 160         (concat
 161          ;; Year
 162          (rmail-date-full-year
 163           (substring date (match-beginning 3) (match-end 3)))
 164          ;; Month
 165          (cdr
 166           (assoc
 167            (upcase (substring date (match-beginning 2) (match-end 2))) month))
 168          ;; Day
 169          (format "%2d" (string-to-int
 170                         (substring date
 171                                    (match-beginning 1) (match-end 1))))
 172          ;; Time
 173          (substring date (match-beginning 4) (match-end 4)))
 174       ;; Cannot understand DATE string.
 175       date
 176       )
 177     ))
 178
 179 (defun rmail-date-full-year (year-string)
 180   (if (<= (length year-string) 2)
 181       (concat "19" year-string)
 182     year-string))