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            )
  88           ((and (eq primary-type 'message)
  89                 (memq (mime-content-type-subtype content-type)
  90                       '(rfc822 news external-body)
  91                       ))
  92            (mime-parse-encapsulated entity)
  93            ))
  94     ))
  95
  96 (mm-define-method entity-content ((entity buffer))
  97   (save-excursion
  98     (set-buffer (mime-entity-buffer-internal entity))
  99     (mime-decode-string
 100      (buffer-substring (mime-entity-body-start-internal entity)
 101                        (mime-entity-body-end-internal entity))
 102      (mime-entity-encoding entity))))
 103
 104 (mm-define-method write-entity-content ((entity buffer) filename)
 105   (save-excursion
 106     (set-buffer (mime-entity-buffer-internal entity))
 107     (mime-write-decoded-region (mime-entity-body-start-internal entity)
 108                                (mime-entity-body-end-internal entity)
 109                                filename
 110                                (or (mime-entity-encoding entity) "7bit"))
 111     ))
 112
 113 (mm-define-method write-entity ((entity buffer) filename)
 114   (save-excursion
 115     (set-buffer (mime-entity-buffer-internal entity))
 116     (write-region-as-binary (mime-entity-header-start-internal entity)
 117                             (mime-entity-body-end-internal entity)
 118                             filename)
 119     ))
 120
 121 (mm-define-method write-entity-body ((entity buffer) filename)
 122   (save-excursion
 123     (set-buffer (mime-entity-buffer-internal entity))
 124     (write-region-as-binary (mime-entity-body-start-internal entity)
 125                             (mime-entity-body-end-internal entity)
 126                             filename)
 127     ))
 128
 129 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
 130   (or (catch 'found
 131         (while visible-fields
 132           (let ((regexp (car visible-fields)))
 133             (if (string-match regexp field-name)
 134                 (throw 'found t)
 135               ))
 136           (setq visible-fields (cdr visible-fields))
 137           ))
 138       (catch 'found
 139         (while invisible-fields
 140           (let ((regexp (car invisible-fields)))
 141             (if (string-match regexp field-name)
 142                 (throw 'found nil)
 143               ))
 144           (setq invisible-fields (cdr invisible-fields))
 145           )
 146         t)))
 147
 148 (mm-define-method insert-decoded-header ((entity buffer)
 149                                          &optional invisible-fields
 150                                          visible-fields)
 151   (save-restriction
 152     (narrow-to-region (point)(point))
 153     (let ((the-buf (current-buffer))
 154           (src-buf (mime-entity-buffer-internal entity))
 155           (h-end (mime-entity-header-end-internal entity))
 156           beg p end field-name len field)
 157       (save-excursion
 158         (set-buffer src-buf)
 159         (goto-char (mime-entity-header-start-internal entity))
 160         (save-restriction
 161           (narrow-to-region (point) h-end)
 162           (while (re-search-forward std11-field-head-regexp nil t)
 163             (setq beg (match-beginning 0)
 164                   p (match-end 0)
 165                   field-name (buffer-substring beg (1- p))
 166                   len (string-width field-name)
 167                   end (std11-field-end))
 168             (when (mime-visible-field-p field-name
 169                                         visible-fields invisible-fields)
 170               (setq field (intern (capitalize field-name)))
 171               (save-excursion
 172                 (set-buffer the-buf)
 173                 (insert field-name)
 174                 (insert ":")
 175                 (cond ((memq field eword-decode-ignored-field-list)
 176                        ;; Don't decode
 177                        (insert-buffer-substring src-buf p end)
 178                        )
 179                       ((memq field eword-decode-structured-field-list)
 180                        ;; Decode as structured field
 181                        (let ((body (save-excursion
 182                                      (set-buffer src-buf)
 183                                      (buffer-substring p end)
 184                                      )))
 185                          (insert (eword-decode-and-fold-structured-field
 186                                   body (1+ len)))
 187                          ))
 188                       (t
 189                        ;; Decode as unstructured field
 190                        (let ((body (save-excursion
 191                                      (set-buffer src-buf)
 192                                      (buffer-substring p end)
 193                                      )))
 194                          (insert (eword-decode-unstructured-field-body
 195                                   body (1+ len)))
 196                          )))
 197                 (insert "\n")
 198                 ))))))))
 199
 200
 201 ;;; @ end
 202 ;;;
 203
 204 (provide 'mmbuffer)
 205
 206 ;;; mmbuffer.el ends here