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-;;; Rmail: sort messages.
-;; Copyright (C) 1990 Masanobu UMEDA
-;; umerin@tc.Nagasaki.GO.JP?
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY. No author or distributor
-;; accepts responsibility to anyone for the consequences of using it
-;; or for whether it serves any particular purpose or works at all,
-;; unless he says so in writing. Refer to the GNU Emacs General Public
-;; License for full details.
-
-;; Everyone is granted permission to copy, modify and redistribute
-;; GNU Emacs, but only under the conditions described in the
-;; GNU Emacs General Public License. A copy of this license is
-;; supposed to have been given to you along with GNU Emacs so you
-;; can know your rights and responsibilities. It should be in a
-;; file named COPYING. Among other things, the copyright notice
-;; and this notice must be preserved on all copies.
-
-(provide 'rmailsort)
-(require 'rmail)
-(require 'sort)
-
-;; GNUS compatible key bindings.
-(define-key rmail-mode-map "\C-c\C-s\C-d" 'rmail-sort-by-date)
-(define-key rmail-mode-map "\C-c\C-s\C-s" 'rmail-sort-by-subject)
-(define-key rmail-mode-map "\C-c\C-s\C-a" 'rmail-sort-by-author)
-(define-key rmail-mode-map "\C-c\C-s\C-r" 'rmail-sort-by-recipient)
-(define-key rmail-mode-map "\C-c\C-s\C-c" 'rmail-sort-by-correspondent)
-(define-key rmail-mode-map "\C-c\C-s\C-l" 'rmail-sort-by-size-lines)
-
-(defun rmail-sort-by-date (reverse)
- "Sort messages of current Rmail file by date.
-If prefix argument REVERSE is non-nil, sort them in reverse order."
- (interactive "P")
- (rmail-sort-messages reverse
- (function
- (lambda (msg)
- (rmail-sortable-date-string
- (rmail-fetch-field msg "Date"))))))
-
-(defun rmail-sort-by-subject (reverse)
- "Sort messages of current Rmail file by subject.
-If prefix argument REVERSE is non-nil, sort them in reverse order."
- (interactive "P")
- (rmail-sort-messages reverse
- (function
- (lambda (msg)
- (let ((key (or (rmail-fetch-field msg "Subject") ""))
- (case-fold-search t))
- ;; Remove `Re:'
- (if (string-match "^\\(re:[ \t]+\\)*" key)
- (substring key (match-end 0)) key))))))
-
-(defun rmail-sort-by-author (reverse)
- "Sort messages of current Rmail file by author.
-If prefix argument REVERSE is non-nil, sort them in reverse order."
- (interactive "P")
- (rmail-sort-messages reverse
- (function
- (lambda (msg)
- (mail-strip-quoted-names
- (or (rmail-fetch-field msg "From")
- (rmail-fetch-field msg "Sender") ""))))))
-
-(defun rmail-sort-by-recipient (reverse)
- "Sort messages of current Rmail file by recipient.
-If prefix argument REVERSE is non-nil, sort them in reverse order."
- (interactive "P")
- (rmail-sort-messages reverse
- (function
- (lambda (msg)
- (mail-strip-quoted-names
- (or (rmail-fetch-field msg "To")
- (rmail-fetch-field msg "Apparently-To") "")
- )))))
-
-(defun rmail-sort-by-correspondent (reverse)
- "Sort messages of current Rmail file by other correspondent.
-If prefix argument REVERSE is non-nil, sort them in reverse order."
- (interactive "P")
- (rmail-sort-messages reverse
- (function
- (lambda (msg)
- (rmail-select-correspondent
- msg
- '("From" "Sender" "To" "Apparently-To"))))))
-
-(defun rmail-select-correspondent (msg fields)
- (let ((ans ""))
- (while (and fields (string= ans ""))
- (setq ans
- (rmail-dont-reply-to
- (mail-strip-quoted-names
- (or (rmail-fetch-field msg (car fields)) ""))))
- (setq fields (cdr fields)))
- ans))
-
-(defun rmail-sort-by-size-lines (reverse)
- "Sort messages of current Rmail file by message size.
-If prefix argument REVERSE is non-nil, sort them in reverse order."
- (interactive "P")
- (rmail-sort-messages reverse
- (function
- (lambda (msg)
- (format "%9d"
- (count-lines (rmail-msgbeg msgnum)
- (rmail-msgend msgnum)))))))
-
-
-(defun rmail-sort-messages (reverse keyfunc)
- "Sort messages of current Rmail file.
-1st argument REVERSE is non-nil, sort them in reverse order.
-2nd argument KEYFUNC is called with message number, and should return a key."
- (let ((buffer-read-only nil)
- (sort-lists nil))
- (message "Finding sort keys...")
- (widen)
- (let ((msgnum 1))
- (while (>= rmail-total-messages msgnum)
- (setq sort-lists
- (cons (cons (funcall keyfunc msgnum) ;A sort key.
- (buffer-substring
- (rmail-msgbeg msgnum) (rmail-msgend msgnum)))
- sort-lists))
- (if (zerop (% msgnum 10))
- (message "Finding sort keys...%d" msgnum))
- (setq msgnum (1+ msgnum))))
- (or reverse (setq sort-lists (nreverse sort-lists)))
- (setq sort-lists
- (sort sort-lists
- (function
- (lambda (a b)
- (string-lessp (car a) (car b))))))
- (if reverse (setq sort-lists (nreverse sort-lists)))
- (message "Reordering buffer...")
- (delete-region (rmail-msgbeg 1) (rmail-msgend rmail-total-messages))
- (let ((msgnum 1))
- (while sort-lists
- (insert (cdr (car sort-lists)))
- (if (zerop (% msgnum 10))
- (message "Reordering buffer...%d" msgnum))
- (setq sort-lists (cdr sort-lists))
- (setq msgnum (1+ msgnum))))
- (rmail-set-message-counters)
- (rmail-show-message 1)))
-
-(defun rmail-fetch-field (msg field)
- "Return the value of the header field FIELD of MSG.
-Arguments are MSG and FIELD."
- (let ((next (rmail-msgend msg)))
- (save-restriction
- (goto-char (rmail-msgbeg msg))
- (narrow-to-region (if (search-forward "\n*** EOOH ***\n" next t)
- (point)
- (forward-line 1)
- (point))
- (progn (search-forward "\n\n" nil t) (point)))
- (mail-fetch-field field))))
-
-;; Copy of the function gnus-comparable-date in gnus.el
-
-(defun rmail-sortable-date-string (date)
- "Make sortable string by string-lessp from DATE."
- (let ((month '(("JAN" . " 1")("FEB" . " 2")("MAR" . " 3")
- ("APR" . " 4")("MAY" . " 5")("JUN" . " 6")
- ("JUL" . " 7")("AUG" . " 8")("SEP" . " 9")
- ("OCT" . "10")("NOV" . "11")("DEC" . "12")
- ("JANUARY" . " 1") ("FEBRUARY" . " 2")
- ("MARCH" . " 3") ("APRIL" . " 4")
- ("MAY" . " 5") ("JUNE" . " 6")
- ("JULY" . " 7") ("AUGUST" . " 8")
- ("SEPTEMBER" " 9") ("OCTOBER" . "10")
- ("NOVEMBER" "11") ("DECEMBER" . "12")))
- (date (or date "")))
- ;; Can understand the following styles:
- ;; (1) 14 Apr 89 03:20:12 GMT
- ;; (2) Fri, 17 Mar 89 4:01:33 GMT
- (if (string-match
- "\\([0-9]+\\) +\\([^ ,]+\\) +\\([0-9]+\\) +\\([0-9:]+\\)" date)
- (concat
- ;; Year
- (rmail-date-full-year
- (substring date (match-beginning 3) (match-end 3)))
- ;; Month
- (cdr
- (assoc
- (upcase (substring date (match-beginning 2) (match-end 2))) month))
- ;; Day
- (format "%2d" (string-to-int
- (substring date
- (match-beginning 1) (match-end 1))))
- ;; Time
- (substring date (match-beginning 4) (match-end 4)))
- ;; Cannot understand DATE string.
- date)))
-
-(defun rmail-date-full-year (year-string)
- (if (<= (length year-string) 2)
- (concat "19" year-string)
- year-string))
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