wl/wl-news.el.in

   1 ;;; wl-news.el --- Create notification from NEWS(.ja) for Wanderlust.
   2
   3 ;; Copyright (C) 2002 Yoichi NAKAYAMA <yoichi@eken.phys.nagoya-u.ac.jp>
   4 ;; Copyright (C) 2002 Kenichi OKADA <okada@opaopa.org>
   5
   6 ;; Author: Yoichi NAKAYAMA <yoichi@eken.phys.nagoya-u.ac.jp>
   7 ;;      Kenichi OKADA <okada@opaopa.org>
   8 ;; Keywords: mail, net news
   9
  10 ;; This file is part of Wanderlust (Yet Another Message Interface on Emacsen).
  11
  12 ;; This program is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16 ;;
  17 ;; This program is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21 ;;
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26 ;;
  27
  28 ;;; Commentary:
  29 ;;
  30
  31 ;;; Code:
  32 ;;
  33
  34 (require 'elmo)
  35 (require 'wl-vars)
  36 (require 'wl-util)
  37 (require 'wl-address)
  38 (require 'wl-folder)
  39
  40 (defvar wl-news-version-file-name "previous-version")
  41 (defvar wl-news-default-previous-version '(2 0 0))
  42
  43 (defvar wl-news-lang
  44   (if (and (boundp 'current-language-environment)
  45            (string-equal "Japanese"
  46                          (symbol-value 'current-language-environment)))
  47       '("ja" "en") '("en" "ja"))
  48         "The list of languages to show NEWS. (order sensitive)")
  49
  50 (defun wl-news-check ()
  51   (let* ((updated (not (wl-news-already-current-p))))
  52     (if updated
  53         (if (and wl-news-lang
  54                  (wl-news-check-news
  55                   (cdr (wl-news-previous-version-load))
  56                   wl-news-lang)
  57                  (not (memq 'wl-news wl-hook)))
  58             (add-hook 'wl-hook 'wl-news))
  59       ;; update wl-news-version-file
  60       (wl-news-previous-version-save
  61        (product-version (product-find 'wl-version))
  62        (cdr (wl-news-previous-version-load))))
  63     updated))
  64
  65 ;;; -*- news-list -*-
  66
  67
  68 ;;; -*- news-list-end -*-
  69
  70 (defun wl-news-previous-version-load ()
  71   (with-temp-buffer
  72     (let ((filename (expand-file-name
  73                      wl-news-version-file-name
  74                      elmo-msgdb-directory))
  75           insert-file-contents-pre-hook
  76           insert-file-contents-post-hook
  77           ret-val)
  78       (if (not (file-readable-p filename))
  79           (cons wl-news-default-previous-version
  80                 wl-news-default-previous-version)
  81         (insert-file-contents filename)
  82         (condition-case nil
  83             (read (current-buffer))
  84           (error nil nil))))))
  85
  86 (defun wl-news-previous-version-save (current-version previous-version)
  87   (with-temp-buffer
  88     (let ((filename (expand-file-name
  89                      wl-news-version-file-name
  90                      elmo-msgdb-directory))
  91           print-length print-level)
  92       (prin1 (cons current-version previous-version) (current-buffer))
  93       (princ "\n" (current-buffer))
  94       (if (file-writable-p filename)
  95           (write-region (point-min) (point-max)
  96                         filename nil 'no-msg)
  97         (message "%s is not writable." filename)))))
  98
  99 (defun wl-news-append-news (lang previous-version &optional no-mime-tag)
 100   (require 'wl-mime)
 101   (let ((news-list (cdr (assoc lang wl-news-news-alist)))
 102         ret)
 103     (when news-list
 104       (if no-mime-tag
 105           (insert "--------------\n")
 106         (mime-edit-insert-tag "text" "plain" "" ""))
 107       (while (< 0
 108                 (product-version-compare
 109                  (car (car news-list))
 110                  previous-version))
 111         (setq ret t)
 112         (insert (cdr (car news-list)) "\n\n")
 113         (setq news-list (cdr news-list))))
 114     ret))
 115
 116 (defun wl-news-check-news (version news-lang)
 117   (let ((lang news-lang)
 118         news-list ret)
 119     (while (car lang)
 120       (setq news-list (cdr (assoc (car lang) wl-news-news-alist)))
 121       (while (< 0
 122                 (product-version-compare
 123                  (car (car news-list)) version))
 124         (setq ret t)
 125         (setq news-list (cdr news-list)))
 126       (setq lang (cdr lang)))
 127     ret))
 128
 129 (defun wl-news-already-current-p ()
 130   (>= 0 (product-version-compare
 131          (product-version (product-find 'wl-version))
 132          (car (wl-news-previous-version-load)))))
 133
 134 (defun wl-news-send-news (version news-lang folder)
 135   (require 'wl-draft)
 136   (let ((lang (if (listp wl-news-lang)
 137                   wl-news-lang
 138                 (list wl-news-lang)))
 139         send-buffer
 140         wl-fcc wl-bcc ret)
 141     (save-window-excursion
 142       (set-buffer
 143        (setq send-buffer (wl-draft-create-buffer)))
 144       (wl-draft-create-contents
 145        (list (cons 'From "WL Release 'Bot <wl@lists.airs.net>")
 146              (cons 'To (wl-draft-eword-encode-address-list wl-from))
 147              (cons 'Subject "Wanderlust NEWS")
 148              (cons 'Date (wl-make-date-string))
 149              (cons 'User-Agent wl-generate-mailer-string-function)))
 150       (wl-draft-insert-mail-header-separator)
 151       (wl-draft-prepare-edit)
 152       (goto-char (point-max))
 153       (insert "\nThis message is automatically generated by Wanderlust.\n\n")
 154       ;; insert news
 155       (while (car lang)
 156         (wl-news-append-news (car lang) version)
 157         (setq lang (cdr lang)))
 158       ;; encode
 159       (let ((mime-header-encode-method-alist
 160              '((eword-encode-unstructured-field-body))))
 161         (mime-edit-translate-buffer))
 162       (wl-draft-get-header-delimiter t)
 163       (setq ret
 164             (and (elmo-folder-writable-p
 165                   (wl-folder-get-elmo-folder folder))
 166                  (elmo-folder-append-buffer
 167                   (wl-folder-get-elmo-folder folder))))
 168       (wl-draft-hide send-buffer)
 169       (wl-draft-delete send-buffer))
 170     ret))
 171
 172 ;;; wl-news-mode
 173
 174 (defvar wl-news-buf-name "NEWS")
 175 (defvar wl-news-mode-map nil)
 176 (defvar wl-news-winconf nil)
 177 (defvar wl-news-buffer-oldest-version nil)
 178 (make-variable-buffer-local 'wl-news-buffer-oldest-version)
 179
 180 (unless wl-news-mode-map
 181   (setq wl-news-mode-map (make-sparse-keymap))
 182   (define-key wl-news-mode-map "q"     'wl-news-exit)
 183   (define-key wl-news-mode-map "Q"     'wl-news-force-exit)
 184   (define-key wl-news-mode-map "\C-xk" 'wl-news-exit)
 185   (define-key wl-news-mode-map "a"     'wl-news-show-all)
 186   (define-key wl-news-mode-map "m"     'wl-news-append-to-folder)
 187   (define-key wl-news-mode-map "\C-m"  'wl-news-next-line)
 188   (define-key wl-news-mode-map " "     'wl-news-next-page)
 189   (define-key wl-news-mode-map "\177"  'wl-news-previous-page)
 190   ;; re-bind commands of outline-mode
 191   (define-key wl-news-mode-map "n"     'outline-next-visible-heading)
 192   (define-key wl-news-mode-map "p"     'outline-previous-visible-heading)
 193   (define-key wl-news-mode-map "u"     'outline-up-heading)
 194   (define-key wl-news-mode-map "N"     'outline-forward-same-level)
 195   (define-key wl-news-mode-map "P"     'outline-backward-same-level))
 196
 197 (require 'derived)
 198 (define-derived-mode wl-news-mode outline-mode "NEWS"
 199   "Mode for Wanderlust NEWS(.ja)."
 200   (setq buffer-read-only t))
 201
 202 (defun wl-news (&optional arg)
 203   (interactive "P")
 204   (remove-hook 'wl-hook 'wl-news)
 205   (let* ((previous-version (if arg wl-news-default-previous-version
 206                              (cdr (wl-news-previous-version-load))))
 207          (lang wl-news-lang)
 208          window-lines lines)
 209     (if (or (get-buffer wl-news-buf-name)
 210             (if (wl-news-check-news previous-version wl-news-lang)
 211                 (progn
 212                   (setq wl-news-winconf (current-window-configuration))
 213                   (set-buffer (get-buffer-create wl-news-buf-name))
 214                   (wl-news-mode)
 215                   (setq wl-news-buffer-oldest-version previous-version)
 216                   (buffer-disable-undo (current-buffer))
 217                   ;; insert news
 218                   (let ((buffer-read-only nil))
 219                     (insert "--- Wanderlust NEWS ---  press 'a' to show all NEWS\n")
 220                     (insert "                         press 'm' to mail this NEWS to your folder\n")
 221                     (insert "                         press 'q' to quit\n")
 222                     (insert "                         press 'Q' to force quit\n\n")
 223                     (while (car lang)
 224                       (wl-news-append-news
 225                        (car lang) previous-version t)
 226                       (setq lang (cdr lang))))
 227                   t)
 228               (message "No NEWS.")
 229               nil))
 230         (progn
 231           (switch-to-buffer wl-news-buf-name)
 232           (delete-other-windows)
 233           (goto-char (point-min))))))
 234
 235 (defun wl-news-next-line ()
 236   (interactive)
 237   (scroll-up 1))
 238
 239 (defun wl-news-next-page ()
 240   (interactive)
 241   (scroll-up))
 242
 243 (defun wl-news-previous-page ()
 244   (interactive)
 245   (scroll-down))
 246
 247 (defun wl-news-show-all ()
 248   (interactive)
 249   (when (eq major-mode 'wl-news-mode)
 250     (kill-buffer (current-buffer))
 251     (wl-news t)))
 252
 253 (defun wl-news-exit ()
 254   (interactive)
 255   (let* ((oldest-version (cdr (wl-news-previous-version-load)))
 256          (current-version (product-version (product-find 'wl-version)))
 257          (new-old-version current-version)
 258          (buf (get-buffer wl-news-buf-name)))
 259     (when buf
 260       (if (wl-news-check-news oldest-version wl-news-lang)
 261           (if (y-or-n-p "Do you want to see this message again? ")
 262               (progn
 263                 (message "Please M-x wl-news if you want to see it.")
 264                 (setq new-old-version oldest-version))))
 265       (wl-news-previous-version-save
 266        current-version new-old-version)
 267       (kill-buffer (current-buffer))
 268       (if wl-news-winconf
 269           (set-window-configuration wl-news-winconf))
 270       (kill-buffer buf)
 271       (if wl-news-winconf
 272           (set-window-configuration wl-news-winconf)))))
 273
 274 (defun wl-news-append-to-folder ()
 275   (interactive)
 276   (let* ((current-version (product-version (product-find 'wl-version)))
 277          (new-old-version current-version)
 278          (folder wl-default-folder))
 279     (if (or (and (elmo-folder-writable-p
 280                   (wl-folder-get-elmo-folder folder))
 281                  (y-or-n-p (format
 282                             "Do you want to append this message to %s ? "
 283                             wl-default-folder)))
 284             (setq folder
 285                   (wl-summary-read-folder wl-default-folder "to append ")))
 286         (or (wl-news-send-news wl-news-buffer-oldest-version wl-news-lang folder)
 287             (error "Cannot append NEWS mail to %s" folder)))))
 288
 289 (defun wl-news-force-exit ()
 290   (interactive)
 291   (let ((buf))
 292     (when (setq buf (get-buffer wl-news-buf-name))
 293       (wl-news-previous-version-save
 294        (product-version (product-find 'wl-version))
 295        (cdr (wl-news-previous-version-load)))
 296       (kill-buffer buf)
 297       (if wl-news-winconf
 298           (set-window-configuration wl-news-winconf)))))
 299
 300
 301 (require 'product)
 302 (product-provide (provide 'wl-news) (require 'wl-version))
 303
 304 \f
 305 ;; Local Variables:
 306 ;; no-byte-compile: t
 307 ;; End:
 308 ;;; wl-news.el ends here