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   1 ;;; mmgnus.el --- MIME entity implementation for gnus-article
   2
   3 ;; Copyright (C) 1998 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
   6 ;;         Keiichi Suzuki <keiichi@nanp.org>
   7 ;; Keywords: MIME, multimedia, mail, news
   8
   9 ;; This file is part of Nana-gnus.
  10
  11 ;; This program is free software; you can redistribute it and/or
  12 ;; modify it under the terms of the GNU General Public License as
  13 ;; published by the Free Software Foundation; either version 2, or (at
  14 ;; your option) any later version.
  15
  16 ;; This program is distributed in the hope that it will be useful, but
  17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 ;; General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;;; Code:
  27
  28 (condition-case nil
  29     (require 'mmgeneric)
  30   (error nil))
  31 (require 'mime)
  32 (require 'eword-decode)
  33
  34 (eval-and-compile
  35   (luna-define-class mmgnus-entity (mime-entity)
  36                      (body
  37                       header undisplayer content-description
  38                       cache content-id)))
  39
  40 (luna-define-internal-accessors 'mmgnus-entity)
  41
  42 (luna-define-method initialize-instance ((entity mmgnus-entity)
  43                                          &rest init-args)
  44   (apply (car (luna-class-find-functions
  45                (luna-find-class 'standard-object)
  46                'initialize-instance))
  47          entity init-args))
  48
  49 (defun mmgnus-visible-field-p (field-name visible-fields invisible-fields)
  50   (or (catch 'found
  51         (while visible-fields
  52           (let ((regexp (car visible-fields)))
  53             (if (string-match regexp field-name)
  54                 (throw 'found t)
  55               ))
  56           (setq visible-fields (cdr visible-fields))
  57           ))
  58       (catch 'found
  59         (while invisible-fields
  60           (let ((regexp (car invisible-fields)))
  61             (if (string-match regexp field-name)
  62                 (throw 'found nil)
  63               ))
  64           (setq invisible-fields (cdr invisible-fields))
  65           )
  66         t)))
  67
  68 (defun mmgnus-insert-header-from-string (string
  69                                          &optional invisible-fields
  70                                          visible-fields)
  71   (let ((the-buf (current-buffer))
  72         (mode-obj (mime-find-field-presentation-method 'wide))
  73         field-decoder
  74         f-b p f-e field-name len field field-body buffer)
  75     (with-temp-buffer
  76       (setq buffer (current-buffer))
  77       (insert string)
  78       (goto-char (point-min))
  79       (while (re-search-forward std11-field-head-regexp nil t)
  80         (setq f-b (match-beginning 0)
  81               p (match-end 0)
  82               field-name (buffer-substring f-b p)
  83               len (string-width field-name)
  84               f-e (std11-field-end))
  85         (when (mmgnus-visible-field-p field-name
  86                                       visible-fields invisible-fields)
  87           (setq field (intern
  88                        (capitalize (buffer-substring f-b (1- p))))
  89                 field-body (buffer-substring p f-e)
  90                 field-decoder (inline (mime-find-field-decoder-internal
  91                                        field mode-obj)))
  92           (with-current-buffer the-buf
  93             (insert field-name)
  94             (insert (if field-decoder
  95                         (funcall field-decoder field-body len)
  96                       ;; Don't decode
  97                       field-body))
  98             (insert "\n")))))))
  99
 100 (luna-define-method mime-insert-header ((entity mmgnus-entity)
 101                                         &optional invisible-fields
 102                                         visible-fields)
 103   (mmgnus-insert-header-from-string
 104    (mmgnus-entity-header-internal entity)
 105    invisible-fields visible-fields))
 106
 107 (luna-define-method mime-entity-body ((entity mmgnus-entity))
 108    (cond
 109     ((bufferp (mmgnus-entity-body-internal entity))
 110      (with-current-buffer (mmgnus-entity-body-internal entity)
 111        (buffer-string)))
 112     (t
 113      (error "Invalid body object. %s"
 114             (mmgnus-entity-body-internal entity)))))
 115
 116 (luna-define-method mime-entity-content ((entity mmgnus-entity))
 117   (mime-decode-string (mime-entity-body entity)
 118                       (mime-entity-encoding entity)))
 119
 120 (luna-define-method mime-insert-entity-content ((entity mmgnus-entity))
 121   (insert (mime-entity-content entity)))
 122
 123 (luna-define-method mime-write-entity-content ((entity mmgnus-entity) filename)
 124   (with-temp-buffer
 125     (insert (mime-entity-body entity))
 126     (mime-write-decoded-region (point-min) (point-max)
 127                                filename
 128                                (or (mime-entity-encoding entity) "7bit"))))
 129
 130 (luna-define-method mime-insert-entity ((entity mmgnus-entity))
 131   (insert (mmgnus-entity-header-internal entity)
 132           "\n"
 133           (mime-entity-body entity)))
 134
 135 (luna-define-method mime-write-entity ((entity mmgnus-entity) filename)
 136   (with-temp-buffer
 137     (mime-insert-entity entity)
 138     (write-region-as-raw-text-CRLF (point-min) (point-max) filename)))
 139
 140 (luna-define-method mime-write-entity-body ((entity mmgnus-entity) filename)
 141   (with-temp-buffer
 142     (insert (mime-entity-body entity))
 143     (write-region-as-binary (point-min) (point-max) filename)))
 144
 145 (eval-and-compile
 146   (luna-define-class mime-gnus-entity (mmgnus-entity)
 147                      (number
 148                       subject from date id references chars lines xref extra)))
 149
 150 (luna-define-internal-accessors 'mime-gnus-entity)
 151
 152 (luna-define-method initialize-instance ((entity mime-gnus-entity)
 153                                          &rest init-args)
 154   (apply (car (luna-class-find-functions
 155                (luna-find-class 'standard-object)
 156                'initialize-instance))
 157          entity init-args))
 158
 159 (luna-define-method mime-insert-header :around ((entity mime-gnus-entity)
 160                                                 &optional invisible-fields
 161                                                 visible-fields)
 162   (luna-call-next-method))
 163
 164 (luna-define-method mime-entity-content :around ((entity mime-gnus-entity))
 165   (luna-call-next-method))
 166
 167 ;;; @ end
 168 ;;;
 169
 170 (provide 'mmgnus)
 171
 172 ;;; mmgnus.el ends here