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263 lines
9.1 KiB
EmacsLisp
263 lines
9.1 KiB
EmacsLisp
;;; rmailkwd.el --- part of the "RMAIL" mail reader for Emacs.
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;; Copyright (C) 1985, 1988, 1994 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: mail
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Code:
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;; Global to all RMAIL buffers. It exists primarily for the sake of
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;; completion. It is better to use strings with the label functions
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;; and let them worry about making the label.
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(defvar rmail-label-obarray (make-vector 47 0))
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;; Named list of symbols representing valid message attributes in RMAIL.
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(defconst rmail-attributes
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(cons 'rmail-keywords
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(mapcar '(lambda (s) (intern s rmail-label-obarray))
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'("deleted" "answered" "filed" "forwarded" "unseen" "edited"))))
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(defconst rmail-deleted-label (intern "deleted" rmail-label-obarray))
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;; Named list of symbols representing valid message keywords in RMAIL.
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(defvar rmail-keywords nil)
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(defun rmail-add-label (string)
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"Add LABEL to labels associated with current RMAIL message.
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Completion is performed over known labels when reading."
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(interactive (list (rmail-read-label "Add label")))
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(rmail-set-label string t))
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(defun rmail-kill-label (string)
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"Remove LABEL from labels associated with current RMAIL message.
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Completion is performed over known labels when reading."
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(interactive (list (rmail-read-label "Remove label")))
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(rmail-set-label string nil))
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(defun rmail-read-label (prompt)
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(if (not rmail-keywords) (rmail-parse-file-keywords))
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(let ((result
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(completing-read (concat prompt
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(if rmail-last-label
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(concat " (default "
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(symbol-name rmail-last-label)
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"): ")
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": "))
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rmail-label-obarray
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nil
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nil)))
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(if (string= result "")
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rmail-last-label
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(setq rmail-last-label (rmail-make-label result t)))))
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(defun rmail-set-label (l state &optional n)
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(rmail-maybe-set-message-counters)
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(if (not n) (setq n rmail-current-message))
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(aset rmail-summary-vector (1- n) nil)
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(let* ((attribute (rmail-attribute-p l))
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(keyword (and (not attribute)
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(or (rmail-keyword-p l)
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(rmail-install-keyword l))))
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(label (or attribute keyword)))
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(if label
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(let ((omax (- (buffer-size) (point-max)))
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(omin (- (buffer-size) (point-min)))
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(buffer-read-only nil)
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(case-fold-search t))
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(unwind-protect
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(save-excursion
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(widen)
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(goto-char (rmail-msgbeg n))
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(forward-line 1)
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(if (not (looking-at "[01],"))
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nil
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(let ((start (1+ (point)))
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(bound))
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(narrow-to-region (point) (progn (end-of-line) (point)))
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(setq bound (point-max))
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(search-backward ",," nil t)
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(if attribute
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(setq bound (1+ (point)))
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(setq start (1+ (point))))
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(goto-char start)
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; (while (re-search-forward "[ \t]*,[ \t]*" nil t)
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; (replace-match ","))
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; (goto-char start)
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(if (re-search-forward
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(concat ", " (rmail-quote-label-name label) ",")
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bound
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'move)
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(if (not state) (replace-match ","))
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(if state (insert " " (symbol-name label) ",")))
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(if (eq label rmail-deleted-label)
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(rmail-set-message-deleted-p n state)))))
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(narrow-to-region (- (buffer-size) omin) (- (buffer-size) omax))
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(if (= n rmail-current-message) (rmail-display-labels)))))))
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;; Commented functions aren't used by RMAIL but might be nice for user
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;; packages that do stuff with RMAIL. Note that rmail-message-labels-p
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;; is in rmail.el now.
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;(defun rmail-message-label-p (label &optional n)
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; "Returns symbol if LABEL (attribute or keyword) on NTH or current message."
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; (rmail-message-labels-p (or n rmail-current-message) (regexp-quote label)))
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;(defun rmail-parse-message-labels (&optional n)
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; "Returns labels associated with NTH or current RMAIL message.
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;The result is a list of two lists of strings. The first is the
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;message attributes and the second is the message keywords."
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; (let (atts keys)
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; (save-restriction
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; (widen)
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; (goto-char (rmail-msgbeg (or n rmail-current-message)))
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; (forward-line 1)
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; (or (looking-at "[01],") (error "Malformed label line"))
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; (forward-char 2)
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; (while (looking-at "[ \t]*\\([^ \t\n,]+\\),")
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; (setq atts (cons (buffer-substring (match-beginning 1) (match-end 1))
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; atts))
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; (goto-char (match-end 0)))
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; (or (looking-at ",") (error "Malformed label line"))
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; (forward-char 1)
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; (while (looking-at "[ \t]*\\([^ \t\n,]+\\),")
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; (setq keys (cons (buffer-substring (match-beginning 1) (match-end 1))
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; keys))
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; (goto-char (match-end 0)))
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; (or (looking-at "[ \t]*$") (error "Malformed label line"))
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; (list (nreverse atts) (nreverse keys)))))
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(defun rmail-attribute-p (s)
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(let ((symbol (rmail-make-label s)))
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(if (memq symbol (cdr rmail-attributes)) symbol)))
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(defun rmail-keyword-p (s)
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(let ((symbol (rmail-make-label s)))
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(if (memq symbol (cdr (rmail-keywords))) symbol)))
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(defun rmail-make-label (s &optional forcep)
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(cond ((symbolp s) s)
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(forcep (intern (downcase s) rmail-label-obarray))
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(t (intern-soft (downcase s) rmail-label-obarray))))
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(defun rmail-force-make-label (s)
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(intern (downcase s) rmail-label-obarray))
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(defun rmail-quote-label-name (label)
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(regexp-quote (symbol-name (rmail-make-label label t))))
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;; Motion on messages with keywords.
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(defun rmail-previous-labeled-message (n labels)
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"Show previous message with one of the labels LABELS.
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LABELS should be a comma-separated list of label names.
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If LABELS is empty, the last set of labels specified is used.
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With prefix argument N moves backward N messages with these labels."
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(interactive "p\nsMove to previous msg with labels: ")
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(rmail-next-labeled-message (- n) labels))
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(defun rmail-next-labeled-message (n labels)
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"Show next message with one of the labels LABELS.
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LABELS should be a comma-separated list of label names.
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If LABELS is empty, the last set of labels specified is used.
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With prefix argument N moves forward N messages with these labels."
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(interactive "p\nsMove to next msg with labels: ")
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(if (string= labels "")
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(setq labels rmail-last-multi-labels))
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(or labels
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(error "No labels to find have been specified previously"))
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(setq rmail-last-multi-labels labels)
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(rmail-maybe-set-message-counters)
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(let ((lastwin rmail-current-message)
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(current rmail-current-message)
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(regexp (concat ", ?\\("
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(mail-comma-list-regexp labels)
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"\\),")))
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(save-restriction
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(widen)
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(while (and (> n 0) (< current rmail-total-messages))
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(setq current (1+ current))
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(if (rmail-message-labels-p current regexp)
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(setq lastwin current n (1- n))))
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(while (and (< n 0) (> current 1))
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(setq current (1- current))
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(if (rmail-message-labels-p current regexp)
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(setq lastwin current n (1+ n)))))
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(rmail-show-message lastwin)
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(if (< n 0)
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(message "No previous message with labels %s" labels))
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(if (> n 0)
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(message "No following message with labels %s" labels))))
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;;; Manipulate the file's Labels option.
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;; Return a list of symbols for all
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;; the keywords (labels) recorded in this file's Labels option.
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(defun rmail-keywords ()
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(or rmail-keywords (rmail-parse-file-keywords)))
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;; Set rmail-keywords to a list of symbols for all
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;; the keywords (labels) recorded in this file's Labels option.
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(defun rmail-parse-file-keywords ()
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(save-restriction
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(save-excursion
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(widen)
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(goto-char 1)
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(setq rmail-keywords
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(if (search-forward "\nLabels:" (rmail-msgbeg 1) t)
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(progn
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(narrow-to-region (point) (progn (end-of-line) (point)))
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(goto-char (point-min))
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(cons 'rmail-keywords
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(mapcar 'rmail-force-make-label
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(mail-parse-comma-list)))))))))
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;; Add WORD to the list in the file's Labels option.
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;; Any keyword used for the first time needs this done.
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(defun rmail-install-keyword (word)
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(let ((keyword (rmail-make-label word t))
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(keywords (rmail-keywords)))
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(if (not (or (rmail-attribute-p keyword)
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(rmail-keyword-p keyword)))
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(let ((omin (- (buffer-size) (point-min)))
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(omax (- (buffer-size) (point-max))))
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(unwind-protect
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(save-excursion
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(widen)
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(goto-char 1)
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(let ((case-fold-search t)
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(buffer-read-only nil))
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(or (search-forward "\nLabels:" nil t)
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(progn
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(end-of-line)
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(insert "\nLabels:")))
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(delete-region (point) (progn (end-of-line) (point)))
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(setcdr keywords (cons keyword (cdr keywords)))
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(while (setq keywords (cdr keywords))
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(insert (symbol-name (car keywords)) ","))
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(delete-char -1)))
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(narrow-to-region (- (buffer-size) omin)
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(- (buffer-size) omax)))))
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keyword))
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;;; rmailkwd.el ends here
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