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, 2006-2016 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 ;; TODO This is not in Gnus 5.11.
  41 (defun-mh mh-gnus-local-map-property gnus-local-map-property (map)
  42   "Return a list suitable for a text property list specifying keymap MAP."
  43   (cond ((featurep 'xemacs) (list 'keymap map))
  44         ((>= emacs-major-version 21) (list 'keymap map))
  45         (t (list 'local-map map))))
  46
  47 ;; Copy of function from mm-decode.el.
  48 (defun-mh mh-mm-merge-handles mm-merge-handles (handles1 handles2)
  49   (append
  50    (if (listp (car handles1))
  51        handles1
  52      (list handles1))
  53    (if (listp (car handles2))
  54        handles2
  55      (list handles2))))
  56
  57 ;; Copy of function from mm-decode.el.
  58 (defun-mh mh-mm-set-handle-multipart-parameter
  59   mm-set-handle-multipart-parameter (handle parameter value)
  60   ;; HANDLE could be a CTL.
  61   (when handle
  62     (put-text-property 0 (length (car handle)) parameter value
  63                        (car handle))))
  64
  65 ;; Copy of function from mm-view.el.
  66 (defun-mh mh-mm-inline-text-vcard mm-inline-text-vcard (handle)
  67   (let ((inhibit-read-only t))
  68     (mm-insert-inline
  69      handle
  70      (concat "\n-- \n"
  71              (ignore-errors
  72                (if (fboundp 'vcard-pretty-print)
  73                    (vcard-pretty-print (mm-get-part handle))
  74                  (vcard-format-string
  75                   (vcard-parse-string (mm-get-part handle)
  76                                       'vcard-standard-filter))))))))
  77
  78 ;; Function from mm-decode.el used in PGP messages. Just define it with older
  79 ;; Gnus to avoid compiler warning.
  80 (defun-mh mh-mm-possibly-verify-or-decrypt
  81   mm-possibly-verify-or-decrypt (parts ctl)
  82   nil)
  83
  84 ;; Copy of macro in mm-decode.el.
  85 (defmacro-mh mh-mm-handle-multipart-ctl-parameter
  86   mm-handle-multipart-ctl-parameter (handle parameter)
  87   `(get-text-property 0 ,parameter (car ,handle)))
  88
  89 ;; Copy of function in mm-decode.el.
  90 (defun-mh mh-mm-readable-p mm-readable-p (handle)
  91   "Say whether the content of HANDLE is readable."
  92   (and (< (with-current-buffer (mm-handle-buffer handle)
  93             (buffer-size)) 10000)
  94        (mm-with-unibyte-buffer
  95          (mm-insert-part handle)
  96          (and (eq (mm-body-7-or-8) '7bit)
  97               (not (mh-mm-long-lines-p 76))))))
  98
  99 ;; Copy of function in mm-bodies.el.
 100 (defun-mh mh-mm-long-lines-p mm-long-lines-p (length)
 101   "Say whether any of the lines in the buffer is longer than LENGTH."
 102   (save-excursion
 103     (goto-char (point-min))
 104     (end-of-line)
 105     (while (and (not (eobp))
 106                 (not (> (current-column) length)))
 107       (forward-line 1)
 108       (end-of-line))
 109     (and (> (current-column) length)
 110          (current-column))))
 111
 112 (defun-mh mh-mm-keep-viewer-alive-p mm-keep-viewer-alive-p (handle)
 113   ;; Released Gnus doesn't keep handles associated with externally displayed
 114   ;; MIME parts. So this will always return nil.
 115   nil)
 116
 117 (defun-mh mh-mm-destroy-parts mm-destroy-parts (list)
 118   "Older versions of Emacs don't have this function."
 119   nil)
 120
 121 (defun-mh mh-mm-uu-dissect-text-parts mm-uu-dissect-text-parts (handles)
 122   "Emacs 21 and XEmacs don't have this function."
 123   nil)
 124
 125 ;; Copy of function in mml.el.
 126 (defun-mh mh-mml-minibuffer-read-disposition
 127   mml-minibuffer-read-disposition (type &optional default filename)
 128   (unless default
 129     (setq default (mml-content-disposition type filename)))
 130   (let ((disposition (completing-read
 131                       (format "Disposition (default %s): " default)
 132                       '(("attachment") ("inline") (""))
 133                       nil t nil nil default)))
 134     (if (not (equal disposition ""))
 135         disposition
 136       default)))
 137
 138 ;; This is mm-save-part from Gnus 5.11 since that function in Emacs
 139 ;; 21.2 is buggy (the args to read-file-name are incorrect) and the
 140 ;; version in Emacs 22 is not consistent with C-x C-w in that you
 141 ;; can't just specify a directory and have the right thing happen.
 142 (defun mh-mm-save-part (handle &optional prompt)
 143   "Write HANDLE to a file.
 144 PROMPT overrides the default one used to ask user for a file name."
 145   (let ((filename (or (mail-content-type-get
 146                        (mm-handle-disposition handle) 'filename)
 147                       (mail-content-type-get
 148                        (mm-handle-type handle) 'name)))
 149         file)
 150     (when filename
 151       (setq filename (gnus-map-function mm-file-name-rewrite-functions
 152                                         (file-name-nondirectory filename))))
 153     (setq file
 154           (read-file-name (or prompt "Save MIME part to: ")
 155                           (or mm-default-directory default-directory)
 156                           nil nil (or filename "")))
 157     (setq mm-default-directory (file-name-directory file))
 158     (and (or (not (file-exists-p file))
 159              (yes-or-no-p (format "File %s already exists; overwrite? "
 160                                   file)))
 161          (progn
 162            (mm-save-part-to-file handle file)
 163            file))))
 164
 165 (defun mh-mm-text-html-renderer ()
 166   "Find the renderer Gnus is using to display text/html MIME parts."
 167   (or (and (boundp 'mm-inline-text-html-renderer) mm-inline-text-html-renderer)
 168       (and (boundp 'mm-text-html-renderer) mm-text-html-renderer)))
 169
 170 (provide 'mh-gnus)
 171
 172 ;; Local Variables:
 173 ;; no-byte-compile: t
 174 ;; no-update-autoloads: t
 175 ;; indent-tabs-mode: nil
 176 ;; sentence-end-double-space: nil
 177 ;; End:
 178
 179 ;;; mh-gnus.el ends here