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;;; pmailkwd.el --- part of the "PMAIL" mail reader for Emacs
;; Copyright (C) 1985, 1988, 1994, 2001, 2002, 2003, 2004,
;; 2005, 2006, 2007, 2008, 2009 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(defvar pmail-buffer)
(defvar pmail-current-message)
(defvar pmail-last-label)
(defvar pmail-last-multi-labels)
(defvar pmail-summary-vector)
(defvar pmail-total-messages)
;; Global to all PMAIL 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 pmail-label-obarray (make-vector 47 0))
;; Named list of symbols representing valid message attributes in PMAIL.
(defconst pmail-attributes
(cons 'pmail-keywords
(mapcar (function (lambda (s) (intern s pmail-label-obarray)))
'("deleted" "answered" "filed" "forwarded" "unseen" "edited"
"resent"))))
(defconst pmail-deleted-label (intern "deleted" pmail-label-obarray))
;; Named list of symbols representing valid message keywords in PMAIL.
(defvar pmail-keywords)
;;;###autoload
(defun pmail-add-label (string)
"Add LABEL to labels associated with current PMAIL message.
Completion is performed over known labels when reading."
(interactive (list (pmail-read-label "Add label")))
(pmail-set-label string t))
;;;###autoload
(defun pmail-kill-label (string)
"Remove LABEL from labels associated with current PMAIL message.
Completion is performed over known labels when reading."
(interactive (list (pmail-read-label "Remove label")))
(pmail-set-label string nil))
;;;###autoload
(defun pmail-read-label (prompt)
(with-current-buffer pmail-buffer
(if (not pmail-keywords) (pmail-parse-file-keywords))
(let ((result
(completing-read (concat prompt
(if pmail-last-label
(concat " (default "
(symbol-name pmail-last-label)
"): ")
": "))
pmail-label-obarray
nil
nil)))
(if (string= result "")
pmail-last-label
(setq pmail-last-label (pmail-make-label result t))))))
(declare-function pmail-maybe-set-message-counters "pmail" ())
(declare-function pmail-display-labels "pmail" ())
(declare-function pmail-msgbeg "pmail" (n))
(declare-function pmail-set-message-deleted-p "pmail" (n state))
(declare-function pmail-message-labels-p "pmail" (msg labels))
(declare-function pmail-show-message "pmail" (&optional n no-summary))
(declare-function mail-comma-list-regexp "mail-utils" (labels))
(declare-function mail-parse-comma-list "mail-utils.el" ())
(defun pmail-set-label (l state &optional n)
(with-current-buffer pmail-buffer
(pmail-maybe-set-message-counters)
(if (not n) (setq n pmail-current-message))
(aset pmail-summary-vector (1- n) nil)
(let* ((attribute (pmail-attribute-p l))
(keyword (and (not attribute)
(or (pmail-keyword-p l)
(pmail-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 (pmail-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 ", " (pmail-quote-label-name label) ",")
bound
'move)
(if (not state) (replace-match ","))
(if state (insert " " (symbol-name label) ",")))
(if (eq label pmail-deleted-label)
(pmail-set-message-deleted-p n state)))))
(narrow-to-region (- (buffer-size) omin) (- (buffer-size) omax))
(if (= n pmail-current-message) (pmail-display-labels))))))))
;; Commented functions aren't used by PMAIL but might be nice for user
;; packages that do stuff with PMAIL. Note that pmail-message-labels-p
;; is in pmail.el now.
;(defun pmail-message-label-p (label &optional n)
; "Returns symbol if LABEL (attribute or keyword) on NTH or current message."
; (pmail-message-labels-p (or n pmail-current-message) (regexp-quote label)))
;(defun pmail-parse-message-labels (&optional n)
; "Returns labels associated with NTH or current PMAIL 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 (pmail-msgbeg (or n pmail-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 pmail-attribute-p (s)
(let ((symbol (pmail-make-label s)))
(if (memq symbol (cdr pmail-attributes)) symbol)))
(defun pmail-keyword-p (s)
(let ((symbol (pmail-make-label s)))
(if (memq symbol (cdr (pmail-keywords))) symbol)))
(defun pmail-make-label (s &optional forcep)
(cond ((symbolp s) s)
(forcep (intern (downcase s) pmail-label-obarray))
(t (intern-soft (downcase s) pmail-label-obarray))))
(defun pmail-force-make-label (s)
(intern (downcase s) pmail-label-obarray))
(defun pmail-quote-label-name (label)
(regexp-quote (symbol-name (pmail-make-label label t))))
;; Motion on messages with keywords.
;;;###autoload
(defun pmail-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: ")
(pmail-next-labeled-message (- n) labels))
;;;###autoload
(defun pmail-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 pmail-last-multi-labels))
(or labels
(error "No labels to find have been specified previously"))
(set-buffer pmail-buffer)
(setq pmail-last-multi-labels labels)
(pmail-maybe-set-message-counters)
(let ((lastwin pmail-current-message)
(current pmail-current-message)
(regexp (concat ", ?\\("
(mail-comma-list-regexp labels)
"\\),")))
(save-restriction
(widen)
(while (and (> n 0) (< current pmail-total-messages))
(setq current (1+ current))
(if (pmail-message-labels-p current regexp)
(setq lastwin current n (1- n))))
(while (and (< n 0) (> current 1))
(setq current (1- current))
(if (pmail-message-labels-p current regexp)
(setq lastwin current n (1+ n)))))
(pmail-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 pmail-keywords ()
(or pmail-keywords (pmail-parse-file-keywords)))
;; Set pmail-keywords to a list of symbols for all
;; the keywords (labels) recorded in this file's Labels option.
(defun pmail-parse-file-keywords ()
(save-restriction
(save-excursion
(widen)
(goto-char 1)
(setq pmail-keywords
(if (search-forward "\nLabels:" (pmail-msgbeg 1) t)
(progn
(narrow-to-region (point) (progn (end-of-line) (point)))
(goto-char (point-min))
(cons 'pmail-keywords
(mapcar 'pmail-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 pmail-install-keyword (word)
(let ((keyword (pmail-make-label word t))
(keywords (pmail-keywords)))
(if (not (or (pmail-attribute-p keyword)
(pmail-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))
(provide 'pmailkwd)
;; Local Variables:
;; change-log-default-name: "ChangeLog.pmail"
;; End:
;; arch-tag: 1149979c-8e47-4333-9629-cf3dc887a6a7
;;; pmailkwd.el ends here
|
