lisp/mh-e/mh-gnus.el

   1 ;;; mh-gnus.el --- make MH-E compatible with various versions of Gnus
   2
   3 ;; Copyright (C) 2003, 2004, 2006, 2007, 2008 Free Software Foundation, Inc.
   4
   5 ;; Author: Satyaki Das <satyaki@theforce.stanford.edu>
   6 ;; Maintainer: Bill Wohler <wohler@newt.com>
   7 ;; Keywords: mail
   8 ;; See: mh-e.el
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs 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 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs 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.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;;; Change Log:
  28
  29 ;;; Code:
  30
  31 (require 'mh-e)
  32
  33 (mh-require 'gnus-util nil t)
  34 (mh-require 'mm-bodies nil t)
  35 (mh-require 'mm-decode nil t)
  36 (mh-require 'mm-view nil t)
  37 (mh-require 'mml nil t)
  38
  39 ;; Copy of function from gnus-util.el.
  40 (defun-mh mh-gnus-local-map-property gnus-local-map-property (map)
  41   "Return a list suitable for a text property list specifying keymap MAP."
  42   (cond ((featurep 'xemacs) (list 'keymap map))
  43         ((>= emacs-major-version 21) (list 'keymap map))
  44         (t (list 'local-map map))))
  45
  46 ;; Copy of function from mm-decode.el.
  47 (defun-mh mh-mm-merge-handles mm-merge-handles (handles1 handles2)
  48   (append (if (listp (car handles1)) handles1 (list handles1))
  49           (if (listp (car handles2)) handles2 (list handles2))))
  50
  51 ;; Copy of function from mm-decode.el.
  52 (defun-mh mh-mm-set-handle-multipart-parameter
  53   mm-set-handle-multipart-parameter (handle parameter value)
  54   ;; HANDLE could be a CTL.
  55   (if handle
  56       (put-text-property 0 (length (car handle)) parameter value
  57                          (car handle))))
  58
  59 ;; Copy of function from mm-view.el.
  60 (defun-mh mh-mm-inline-text-vcard mm-inline-text-vcard (handle)
  61   (let (buffer-read-only)
  62     (mm-insert-inline
  63      handle
  64      (concat "\n-- \n"
  65              (ignore-errors
  66                (if (fboundp 'vcard-pretty-print)
  67                    (vcard-pretty-print (mm-get-part handle))
  68                  (vcard-format-string
  69                   (vcard-parse-string (mm-get-part handle)
  70                                       'vcard-standard-filter))))))))
  71
  72 ;; Function from mm-decode.el used in PGP messages. Just define it with older
  73 ;; Gnus to avoid compiler warning.
  74 (defun-mh mh-mm-possibly-verify-or-decrypt
  75   mm-possibly-verify-or-decrypt (parts ctl)
  76   nil)
  77
  78 ;; Copy of macro in mm-decode.el.
  79 (defmacro-mh mh-mm-handle-multipart-ctl-parameter
  80   mm-handle-multipart-ctl-parameter (handle parameter)
  81   `(get-text-property 0 ,parameter (car ,handle)))
  82
  83 ;; Copy of function in mm-decode.el.
  84 (defun-mh mh-mm-readable-p mm-readable-p (handle)
  85   "Say whether the content of HANDLE is readable."
  86   (and (< (with-current-buffer (mm-handle-buffer handle)
  87             (buffer-size)) 10000)
  88        (mm-with-unibyte-buffer
  89          (mm-insert-part handle)
  90          (and (eq (mm-body-7-or-8) '7bit)
  91               (not (mh-mm-long-lines-p 76))))))
  92
  93 ;; Copy of function in mm-bodies.el.
  94 (defun-mh mh-mm-long-lines-p mm-long-lines-p (length)
  95   "Say whether any of the lines in the buffer is longer than LENGTH."
  96   (save-excursion
  97     (goto-char (point-min))
  98     (end-of-line)
  99     (while (and (not (eobp))
 100                 (not (> (current-column) length)))
 101       (forward-line 1)
 102       (end-of-line))
 103     (and (> (current-column) length)
 104          (current-column))))
 105
 106 (defun-mh mh-mm-keep-viewer-alive-p mm-keep-viewer-alive-p (handle)
 107   ;; Released Gnus doesn't keep handles associated with externally displayed
 108   ;; MIME parts. So this will always return nil.
 109   nil)
 110
 111 (defun-mh mh-mm-destroy-parts mm-destroy-parts (list)
 112   "Older versions of Emacs don't have this function."
 113   nil)
 114
 115 (defun-mh mh-mm-uu-dissect-text-parts mm-uu-dissect-text-parts (handles)
 116   "Emacs 21 and XEmacs don't have this function."
 117   nil)
 118
 119 ;; Copy of function in mml.el.
 120 (defun-mh mh-mml-minibuffer-read-disposition
 121   mml-minibuffer-read-disposition (type &optional default)
 122   (unless default (setq default
 123                         (if (and (string-match "\\`text/" type)
 124                                  (not (string-match "\\`text/rtf\\'" type)))
 125                             "inline"
 126                           "attachment")))
 127   (let ((disposition (completing-read
 128                       (format "Disposition (default %s): " default)
 129                       '(("attachment") ("inline") (""))
 130                       nil t nil nil default)))
 131     (if (not (equal disposition ""))
 132         disposition
 133       default)))
 134
 135 ;; This is mm-save-part from Gnus 5.10 since that function in emacs21.2 is
 136 ;; buggy (the args to read-file-name are incorrect). When all supported
 137 ;; versions of Emacs come with at least Gnus 5.10, we can delete this
 138 ;; function and rename calls to mh-mm-save-part to mm-save-part.
 139 (defun mh-mm-save-part (handle)
 140   "Write HANDLE to a file."
 141   (let ((name (mail-content-type-get (mm-handle-type handle) 'name))
 142         (filename (mail-content-type-get
 143                    (mm-handle-disposition handle) 'filename))
 144         file)
 145     (when filename
 146       (setq filename (file-name-nondirectory filename)))
 147     (setq file (read-file-name "Save MIME part to: "
 148                                (or mm-default-directory
 149                                    default-directory)
 150                                nil nil (or filename name "")))
 151     (setq mm-default-directory (file-name-directory file))
 152     (and (or (not (file-exists-p file))
 153              (yes-or-no-p (format "File %s already exists; overwrite? "
 154                                   file)))
 155          (mm-save-part-to-file handle file))))
 156
 157 (defun mh-mm-text-html-renderer ()
 158   "Find the renderer Gnus is using to display text/html MIME parts."
 159   (or (and (boundp 'mm-inline-text-html-renderer) mm-inline-text-html-renderer)
 160       (and (boundp 'mm-text-html-renderer) mm-text-html-renderer)))
 161
 162 (provide 'mh-gnus)
 163
 164 ;; Local Variables:
 165 ;; no-byte-compile: t
 166 ;; no-update-autoloads: t
 167 ;; indent-tabs-mode: nil
 168 ;; sentence-end-double-space: nil
 169 ;; End:
 170
 171 ;; arch-tag: 1e3638af-cad3-4c69-8427-bc8eb6e5e4fa
 172 ;;; mh-gnus.el ends here