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;; "RMAIL" mail reader for Emacs.
;; Copyright (C) 1985, 1988 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 1, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;; Global to all RMAIL buffers. It exists primarily for the sake of
;; completion. It is better to use strings with the label functions
;; and let them worry about making the label.
(defvar rmail-label-obarray (make-vector 47 0))
;; Named list of symbols representing valid message attributes in RMAIL.
(defconst rmail-attributes
(cons 'rmail-keywords
(mapcar '(lambda (s) (intern s rmail-label-obarray))
'("deleted" "answered" "filed" "forwarded" "unseen" "edited"))))
(defconst rmail-deleted-label (intern "deleted" rmail-label-obarray))
;; Named list of symbols representing valid message keywords in RMAIL.
(defvar rmail-keywords nil)
(defun rmail-add-label (string)
"Add LABEL to labels associated with current RMAIL message.
Completion is performed over known labels when reading."
(interactive (list (rmail-read-label "Add label")))
(rmail-set-label string t))
(defun rmail-kill-label (string)
"Remove LABEL from labels associated with current RMAIL message.
Completion is performed over known labels when reading."
(interactive (list (rmail-read-label "Remove label")))
(rmail-set-label string nil))
(defun rmail-read-label (prompt)
(if (not rmail-keywords) (rmail-parse-file-keywords))
(let ((result
(completing-read (concat prompt
(if rmail-last-label
(concat " (default "
(symbol-name rmail-last-label)
"): ")
": "))
rmail-label-obarray
nil
nil)))
(if (string= result "")
rmail-last-label
(setq rmail-last-label (rmail-make-label result t)))))
(defun rmail-set-label (l state &optional n)
(rmail-maybe-set-message-counters)
(if (not n) (setq n rmail-current-message))
(aset rmail-summary-vector (1- n) nil)
(let* ((attribute (rmail-attribute-p l))
(keyword (and (not attribute)
(or (rmail-keyword-p l)
(rmail-install-keyword l))))
(label (or attribute keyword)))
(if label
(let ((omax (- (buffer-size) (point-max)))
(omin (- (buffer-size) (point-min)))
(buffer-read-only nil)
(case-fold-search t))
(unwind-protect
(save-excursion
(widen)
(goto-char (rmail-msgbeg n))
(forward-line 1)
(if (not (looking-at "[01],"))
nil
(let ((start (1+ (point)))
(bound))
(narrow-to-region (point) (progn (end-of-line) (point)))
(setq bound (point-max))
(search-backward ",," nil t)
(if attribute
(setq bound (1+ (point)))
(setq start (1+ (point))))
(goto-char start)
; (while (re-search-forward "[ \t]*,[ \t]*" nil t)
; (replace-match ","))
; (goto-char start)
(if (re-search-forward
(concat ", " (rmail-quote-label-name label) ",")
bound
'move)
(if (not state) (replace-match ","))
(if state (insert " " (symbol-name label) ",")))
(if (eq label rmail-deleted-label)
(rmail-set-message-deleted-p n state)))))
(narrow-to-region (- (buffer-size) omin) (- (buffer-size) omax))
(if (= n rmail-current-message) (rmail-display-labels)))))))
;; Commented functions aren't used by RMAIL but might be nice for user
;; packages that do stuff with RMAIL. Note that rmail-message-labels-p
;; is in rmail.el now.
;(defun rmail-message-attribute-p (attribute &optional n)
; "Returns t if ATTRIBUTE on NTH or current message."
; (rmail-message-labels-p (rmail-make-label attribute t) n))
;(defun rmail-message-keyword-p (keyword &optional n)
; "Returns t if KEYWORD on NTH or current message."
; (rmail-message-labels-p (rmail-make-label keyword t) n t))
;(defun rmail-message-label-p (label &optional n)
; "Returns symbol if LABEL (attribute or keyword) on NTH or current message."
; (rmail-message-labels-p (rmail-make-label label t) n 'all))
;; Not used by RMAIL but might be nice for user package.
;(defun rmail-parse-message-labels (&optional n)
; "Returns labels associated with NTH or current RMAIL message.
;Results is a list of two lists. The first is the message attributes
;and the second is the message keywords. Labels are represented as symbols."
; (let ((omin (- (buffer-size) (point-min)))
; (omax (- (buffer-size) (point-max)))
; (result))
; (unwind-protect
; (save-excursion
; (let ((beg (rmail-msgbeg (or n rmail-current-message))))
; (widen)
; (goto-char beg)
; (forward-line 1)
; (if (looking-at "[01],")
; (save-restriction
; (narrow-to-region (point) (save-excursion (end-of-line) (point)))
; (rmail-nuke-whitespace)
; (goto-char (1+ (point-min)))
; (list (mail-parse-comma-list) (mail-parse-comma-list))))))
; (narrow-to-region (- (buffer-size) omin)
; (- (buffer-size) omax))
; nil)))
(defun rmail-attribute-p (s)
(let ((symbol (rmail-make-label s)))
(if (memq symbol (cdr rmail-attributes)) symbol)))
(defun rmail-keyword-p (s)
(let ((symbol (rmail-make-label s)))
(if (memq symbol (cdr (rmail-keywords))) symbol)))
(defun rmail-make-label (s &optional forcep)
(cond ((symbolp s) s)
(forcep (intern (downcase s) rmail-label-obarray))
(t (intern-soft (downcase s) rmail-label-obarray))))
(defun rmail-force-make-label (s)
(intern (downcase s) rmail-label-obarray))
(defun rmail-quote-label-name (label)
(regexp-quote (symbol-name (rmail-make-label label t))))
;; Motion on messages with keywords.
(defun rmail-previous-labeled-message (n labels)
"Show previous message with one of the labels LABELS.
LABELS should be a comma-separated list of label names.
If LABELS is empty, the last set of labels specified is used.
With prefix argument N moves backward N messages with these labels."
(interactive "p\nsMove to previous msg with labels: ")
(rmail-next-labeled-message (- n) labels))
(defun rmail-next-labeled-message (n labels)
"Show next message with one of the labels LABELS.
LABELS should be a comma-separated list of label names.
If LABELS is empty, the last set of labels specified is used.
With prefix argument N moves forward N messages with these labels."
(interactive "p\nsMove to next msg with labels: ")
(if (string= labels "")
(setq labels rmail-last-multi-labels))
(or labels
(error "No labels to find have been specified previously"))
(setq rmail-last-multi-labels labels)
(rmail-maybe-set-message-counters)
(let ((lastwin rmail-current-message)
(current rmail-current-message)
(regexp (concat ", ?\\("
(mail-comma-list-regexp labels)
"\\),")))
(save-restriction
(widen)
(while (and (> n 0) (< current rmail-total-messages))
(setq current (1+ current))
(if (rmail-message-labels-p current regexp)
(setq lastwin current n (1- n))))
(while (and (< n 0) (> current 1))
(setq current (1- current))
(if (rmail-message-labels-p current regexp)
(setq lastwin current n (1+ n)))))
(rmail-show-message lastwin)
(if (< n 0)
(message "No previous message with labels %s" labels))
(if (> n 0)
(message "No following message with labels %s" labels))))
;;; Manipulate the file's Labels option.
;; Return a list of symbols for all
;; the keywords (labels) recorded in this file's Labels option.
(defun rmail-keywords ()
(or rmail-keywords (rmail-parse-file-keywords)))
;; Set rmail-keywords to a list of symbols for all
;; the keywords (labels) recorded in this file's Labels option.
(defun rmail-parse-file-keywords ()
(save-restriction
(save-excursion
(widen)
(goto-char 1)
(setq rmail-keywords
(if (search-forward "\nLabels:" (rmail-msgbeg 1) t)
(progn
(narrow-to-region (point) (progn (end-of-line) (point)))
(goto-char (point-min))
(cons 'rmail-keywords
(mapcar 'rmail-force-make-label
(mail-parse-comma-list)))))))))
;; Add WORD to the list in the file's Labels option.
;; Any keyword used for the first time needs this done.
(defun rmail-install-keyword (word)
(let ((keyword (rmail-make-label word t))
(keywords (rmail-keywords)))
(if (not (or (rmail-attribute-p keyword)
(rmail-keyword-p keyword)))
(let ((omin (- (buffer-size) (point-min)))
(omax (- (buffer-size) (point-max))))
(unwind-protect
(save-excursion
(widen)
(goto-char 1)
(let ((case-fold-search t)
(buffer-read-only nil))
(or (search-forward "\nLabels:" nil t)
(progn
(end-of-line)
(insert "\nLabels:")))
(delete-region (point) (progn (end-of-line) (point)))
(setcdr keywords (cons keyword (cdr keywords)))
(while (setq keywords (cdr keywords))
(insert (symbol-name (car keywords)) ","))
(delete-char -1)))
(narrow-to-region (- (buffer-size) omin)
(- (buffer-size) omax)))))
keyword))
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