1
0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-16 09:50:25 +00:00
emacs/lisp/mail/rmailkwd.el
2006-02-06 12:31:40 +00:00

284 lines
9.6 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; rmailkwd.el --- part of the "RMAIL" mail reader for Emacs
;; Copyright (C) 1985, 1988, 1994, 2001, 2002, 2003, 2004,
;; 2005, 2006 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: mail
;; 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 2, 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, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
(defvar rmail-buffer)
(defvar rmail-current-message)
(defvar rmail-last-label)
(defvar rmail-last-multi-labels)
(defvar rmail-summary-vector)
(defvar rmail-total-messages)
;; 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 (function (lambda (s) (intern s rmail-label-obarray)))
'("deleted" "answered" "filed" "forwarded" "unseen" "edited"
"resent"))))
(defconst rmail-deleted-label (intern "deleted" rmail-label-obarray))
;; Named list of symbols representing valid message keywords in RMAIL.
(defvar rmail-keywords)
;;;###autoload
(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))
;;;###autoload
(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))
;;;###autoload
(defun rmail-read-label (prompt)
(with-current-buffer rmail-buffer
(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)
(with-current-buffer rmail-buffer
(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-label-p (label &optional n)
; "Returns symbol if LABEL (attribute or keyword) on NTH or current message."
; (rmail-message-labels-p (or n rmail-current-message) (regexp-quote label)))
;(defun rmail-parse-message-labels (&optional n)
; "Returns labels associated with NTH or current RMAIL message.
;The result is a list of two lists of strings. The first is the
;message attributes and the second is the message keywords."
; (let (atts keys)
; (save-restriction
; (widen)
; (goto-char (rmail-msgbeg (or n rmail-current-message)))
; (forward-line 1)
; (or (looking-at "[01],") (error "Malformed label line"))
; (forward-char 2)
; (while (looking-at "[ \t]*\\([^ \t\n,]+\\),")
; (setq atts (cons (buffer-substring (match-beginning 1) (match-end 1))
; atts))
; (goto-char (match-end 0)))
; (or (looking-at ",") (error "Malformed label line"))
; (forward-char 1)
; (while (looking-at "[ \t]*\\([^ \t\n,]+\\),")
; (setq keys (cons (buffer-substring (match-beginning 1) (match-end 1))
; keys))
; (goto-char (match-end 0)))
; (or (looking-at "[ \t]*$") (error "Malformed label line"))
; (list (nreverse atts) (nreverse keys)))))
(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.
;;;###autoload
(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))
;;;###autoload
(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"))
(set-buffer rmail-buffer)
(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))
;;; arch-tag: b26b3392-99ca-4e1d-933a-dab59b04e9a8
;;; rmailkwd.el ends here