emacs-lisp/package.el (describe-package-1): Describe incompatibility.
[emacs.git] / lisp / mh-e / mh-gnus.el
blobb54355e3e7490ee1d6e574e2ff735eef58f70380
1 ;;; mh-gnus.el --- make MH-E compatible with various versions of Gnus
3 ;; Copyright (C) 2003-2004, 2006-2015 Free Software Foundation, Inc.
5 ;; Author: Satyaki Das <satyaki@theforce.stanford.edu>
6 ;; Maintainer: Bill Wohler <wohler@newt.com>
7 ;; Keywords: mail
8 ;; See: mh-e.el
10 ;; This file is part of GNU Emacs.
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.
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.
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/>.
25 ;;; Commentary:
27 ;;; Change Log:
29 ;;; Code:
31 (require 'mh-e)
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)
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))))
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))))
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))))
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))))))))
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)
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)))
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))))))
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))))
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)
117 (defun-mh mh-mm-destroy-parts mm-destroy-parts (list)
118 "Older versions of Emacs don't have this function."
119 nil)
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)
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)))
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))))
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)))
170 (provide 'mh-gnus)
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:
179 ;;; mh-gnus.el ends here