mmbuffer.el

   1 ;;; mmbuffer.el --- MIME entity module for binary buffer
   2
   3 ;; Copyright (C) 1998 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
   6 ;; Keywords: MIME, multimedia, mail, news
   7
   8 ;; This file is part of FLIM (Faithful Library about Internet Message).
   9
  10 ;; This program is free software; you can redistribute it and/or
  11 ;; modify it under the terms of the GNU General Public License as
  12 ;; published by the Free Software Foundation; either version 2, or (at
  13 ;; your option) any later version.
  14
  15 ;; This program is distributed in the hope that it will be useful, but
  16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 ;; General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Code:
  26
  27 (require 'mime)
  28 (require 'mime-parse)
  29
  30 (mm-define-backend buffer)
  31
  32 (mm-define-method initialize-instance ((entity buffer))
  33   (mime-entity-set-buffer-internal
  34    entity (mime-entity-location-internal entity))
  35   (save-excursion
  36     (set-buffer (mime-entity-buffer-internal entity))
  37     (setq mime-message-structure entity)
  38     (let ((header-start (point-min))
  39           header-end
  40           body-start
  41           (body-end (point-max)))
  42       (goto-char header-start)
  43       (if (re-search-forward "^$" nil t)
  44           (setq header-end (match-end 0)
  45                 body-start (if (= header-end body-end)
  46                                body-end
  47                              (1+ header-end)))
  48         (setq header-end (point-min)
  49               body-start (point-min)))
  50       (save-restriction
  51         (narrow-to-region header-start header-end)
  52         (mime-entity-set-content-type-internal
  53          entity
  54          (let ((str (std11-fetch-field "Content-Type")))
  55            (if str
  56                (mime-parse-Content-Type str)
  57              )))
  58         )
  59       (mime-entity-set-header-start-internal entity header-start)
  60       (mime-entity-set-header-end-internal entity header-end)
  61       (mime-entity-set-body-start-internal entity body-start)
  62       (mime-entity-set-body-end-internal entity body-end)
  63       )))
  64
  65 (mm-define-method entity-point-min ((entity buffer))
  66   (mime-entity-header-start-internal entity))
  67
  68 (mm-define-method entity-point-max ((entity buffer))
  69   (mime-entity-body-end-internal entity))
  70
  71 (mm-define-method fetch-field ((entity buffer) field-name)
  72   (save-excursion
  73     (set-buffer (mime-entity-buffer-internal entity))
  74     (save-restriction
  75       (narrow-to-region (mime-entity-header-start-internal entity)
  76                         (mime-entity-header-end-internal entity))
  77       (std11-fetch-field field-name)
  78       )))
  79
  80 (mm-define-method entity-cooked-p ((entity buffer)) nil)
  81
  82 (mm-define-method entity-children ((entity buffer))
  83   (let* ((content-type (mime-entity-content-type entity))
  84          (primary-type (mime-content-type-primary-type content-type)))
  85     (cond ((eq primary-type 'multipart)
  86            (mime-parse-multipart entity)
  87            (mime-entity-children-internal entity)
  88            )
  89           ((and (eq primary-type 'message)
  90                 (memq (mime-content-type-subtype content-type)
  91                       '(rfc822 news external-body)
  92                       ))
  93            (mime-parse-encapsulated entity)
  94            (mime-entity-children-internal entity)
  95            )
  96           )))
  97
  98 (mm-define-method entity-content ((entity buffer))
  99   (save-excursion
 100     (set-buffer (mime-entity-buffer-internal entity))
 101     (mime-decode-string
 102      (buffer-substring (mime-entity-body-start-internal entity)
 103                        (mime-entity-body-end-internal entity))
 104      (mime-entity-encoding entity))))
 105
 106 (mm-define-method write-entity-content ((entity buffer) filename)
 107   (save-excursion
 108     (set-buffer (mime-entity-buffer-internal entity))
 109     (mime-write-decoded-region (mime-entity-body-start-internal entity)
 110                                (mime-entity-body-end-internal entity)
 111                                filename
 112                                (or (mime-entity-encoding entity) "7bit"))
 113     ))
 114
 115 (mm-define-method write-entity ((entity buffer) filename)
 116   (save-excursion
 117     (set-buffer (mime-entity-buffer-internal entity))
 118     (write-region-as-binary (mime-entity-header-start-internal entity)
 119                             (mime-entity-body-end-internal entity)
 120                             filename)
 121     ))
 122
 123 (mm-define-method write-entity-body ((entity buffer) filename)
 124   (save-excursion
 125     (set-buffer (mime-entity-buffer-internal entity))
 126     (write-region-as-binary (mime-entity-body-start-internal entity)
 127                             (mime-entity-body-end-internal entity)
 128                             filename)
 129     ))
 130
 131 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
 132   (or (catch 'found
 133         (while visible-fields
 134           (let ((regexp (car visible-fields)))
 135             (if (string-match regexp field-name)
 136                 (throw 'found t)
 137               ))
 138           (setq visible-fields (cdr visible-fields))
 139           ))
 140       (catch 'found
 141         (while invisible-fields
 142           (let ((regexp (car invisible-fields)))
 143             (if (string-match regexp field-name)
 144                 (throw 'found nil)
 145               ))
 146           (setq invisible-fields (cdr invisible-fields))
 147           )
 148         t)))
 149
 150 (mm-define-method insert-decoded-header ((entity buffer)
 151                                          &optional invisible-fields
 152                                          visible-fields)
 153   (save-restriction
 154     (narrow-to-region (point)(point))
 155     (let ((the-buf (current-buffer))
 156           (src-buf (mime-entity-buffer-internal entity))
 157           (h-end (mime-entity-header-end-internal entity))
 158           beg p end field-name len field)
 159       (save-excursion
 160         (set-buffer src-buf)
 161         (goto-char (mime-entity-header-start-internal entity))
 162         (save-restriction
 163           (narrow-to-region (point) h-end)
 164           (while (re-search-forward std11-field-head-regexp nil t)
 165             (setq beg (match-beginning 0)
 166                   p (match-end 0)
 167                   field-name (buffer-substring beg (1- p))
 168                   len (string-width field-name)
 169                   end (std11-field-end))
 170             (when (mime-visible-field-p field-name
 171                                         visible-fields invisible-fields)
 172               (setq field (intern (capitalize field-name)))
 173               (save-excursion
 174                 (set-buffer the-buf)
 175                 (insert field-name)
 176                 (insert ":")
 177                 (cond ((memq field eword-decode-ignored-field-list)
 178                        ;; Don't decode
 179                        (insert-buffer-substring src-buf p end)
 180                        )
 181                       ((memq field eword-decode-structured-field-list)
 182                        ;; Decode as structured field
 183                        (let ((body (save-excursion
 184                                      (set-buffer src-buf)
 185                                      (buffer-substring p end)
 186                                      )))
 187                          (insert (eword-decode-and-fold-structured-field
 188                                   body (1+ len)))
 189                          ))
 190                       (t
 191                        ;; Decode as unstructured field
 192                        (let ((body (save-excursion
 193                                      (set-buffer src-buf)
 194                                      (buffer-substring p end)
 195                                      )))
 196                          (insert (eword-decode-unstructured-field-body
 197                                   body (1+ len)))
 198                          )))
 199                 (insert "\n")
 200                 ))))))))
 201
 202
 203 ;;; @ end
 204 ;;;
 205
 206 (provide 'mmbuffer)
 207
 208 ;;; mmbuffer.el ends here