mmexternal.el

   1 ;;; mmexternal.el --- MIME entity module for external buffer
   2
   3 ;; Copyright (C) 1998,1999,2000 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
   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., 51 Franklin Street, Fifth Floor,
  23 ;; Boston, MA 02110-1301, USA.
  24
  25 ;;; Code:
  26
  27 (require 'mmgeneric)
  28 (require 'mime)
  29
  30 (eval-and-compile
  31   (luna-define-class mime-external-entity (mime-entity)
  32                      (body-buffer
  33                       body-file))
  34   (luna-define-internal-accessors 'mime-external-entity)
  35
  36   ;; In an external entity, information of media-type or other
  37   ;; information which are represented in a header in a non-external
  38   ;; entity are in the body of the parent entity.
  39   )
  40
  41 (luna-define-method mime-entity-name ((entity mime-external-entity))
  42   (concat "child of "
  43           (mime-entity-name
  44            (mime-entity-parent-internal entity))))
  45
  46
  47 (defun mmexternal-require-file-name (entity)
  48   (condition-case nil
  49       (or (mime-external-entity-body-file-internal entity)
  50           (let* ((ct (mime-entity-content-type
  51                       (mime-entity-parent-internal entity)))
  52                  (access-type
  53                   (mime-content-type-parameter ct "access-type")))
  54             (if (and access-type
  55                      (string= access-type "anon-ftp"))
  56                 (let ((site (mime-content-type-parameter ct "site"))
  57                       (directory
  58                        (mime-content-type-parameter ct "directory"))
  59                       (name (mime-content-type-parameter ct "name")))
  60                   (mime-external-entity-set-body-file-internal
  61                    entity
  62                    (expand-file-name
  63                     name
  64                     (concat "/anonymous@" site ":"
  65                             (file-name-as-directory directory))))))))
  66     (error (message "Can't make file-name of external-body."))))
  67
  68 (defun mmexternal-require-buffer (entity)
  69   (unless (and (mime-external-entity-body-buffer-internal entity)
  70                (buffer-live-p
  71                 (mime-external-entity-body-buffer-internal entity)))
  72     (condition-case nil
  73         (progn
  74           (mmexternal-require-file-name entity)
  75           (mime-external-entity-set-body-buffer-internal
  76            entity
  77            (with-current-buffer (get-buffer-create
  78                                  (concat " *Body of "
  79                                          (mime-entity-name entity)
  80                                          "*"))
  81              (binary-insert-encoded-file
  82               (mime-external-entity-body-file-internal entity))
  83              (current-buffer))))
  84       (error (message "Can't get external-body.")))))
  85
  86
  87 ;;; @ entity
  88 ;;;
  89
  90 (luna-define-method mime-insert-entity ((entity mime-external-entity))
  91   (mime-insert-entity-body (mime-entity-parent-internal entity))
  92   (insert "\n")
  93   (mime-insert-entity-body entity))
  94
  95 (luna-define-method mime-write-entity ((entity mime-external-entity) filename)
  96   (with-temp-buffer
  97     (mime-insert-entity entity)
  98     (let ((coding-system-for-write 'raw-text-dos))
  99       (write-region (point-min) (point-max) filename))))
 100
 101
 102 ;;; @ entity header
 103 ;;;
 104
 105
 106 ;;; @ entity body
 107 ;;;
 108
 109 (luna-define-method mime-entity-body ((entity mime-external-entity))
 110   (mmexternal-require-buffer entity)
 111   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 112     (buffer-string)))
 113
 114 (luna-define-method mime-insert-entity-body ((entity mime-external-entity))
 115   (mmexternal-require-buffer entity)
 116   (insert-buffer-substring
 117    (mime-external-entity-body-buffer-internal entity)))
 118
 119 (luna-define-method mime-write-entity-body ((entity mime-external-entity)
 120                                             filename)
 121   (mmexternal-require-buffer entity)
 122   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 123     (binary-write-decoded-region (point-min) (point-max) filename)))
 124
 125
 126 ;;; @ entity content
 127 ;;;
 128
 129 (luna-define-method mime-entity-content ((entity mime-external-entity))
 130   (let ((ret (mime-entity-body entity)))
 131     (if ret
 132         (mime-decode-string ret (mime-entity-encoding entity))
 133       (message "Cannot get content")
 134       nil)))
 135
 136 (luna-define-method mime-insert-entity-content ((entity mime-external-entity))
 137   (insert (mime-entity-content entity)))
 138
 139 (luna-define-method mime-write-entity-content ((entity mime-external-entity)
 140                                                filename)
 141   (mmexternal-require-buffer entity)
 142   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 143     (mime-write-decoded-region (point-min) (point-max)
 144                                filename
 145                                (or (mime-entity-encoding entity) "7bit"))))
 146
 147
 148 ;;; @ header field
 149 ;;;
 150
 151 (luna-define-method mime-entity-fetch-field :around
 152   ((entity mime-external-entity) field-name)
 153   (or (luna-call-next-method)
 154       (with-temp-buffer
 155         (mime-insert-entity-body (mime-entity-parent-internal entity))
 156         (let ((ret (std11-fetch-field field-name)))
 157           (when ret
 158             (or (symbolp field-name)
 159                 (setq field-name (intern (capitalize field-name))))
 160             (mime-entity-set-original-header-internal
 161              entity
 162              (put-alist field-name ret
 163                         (mime-entity-original-header-internal entity)))
 164             ret)))))
 165
 166 (luna-define-method mime-insert-header ((entity mime-external-entity)
 167                                         &optional invisible-fields
 168                                         visible-fields)
 169   (let ((the-buf (current-buffer))
 170         buf p-min p-max)
 171     (with-temp-buffer
 172       (mime-insert-entity-body (mime-entity-parent-internal entity))
 173       (setq buf (current-buffer)
 174             p-min (point-min)
 175             p-max (point-max))
 176       (set-buffer the-buf)
 177       (mime-insert-header-from-buffer buf p-min p-max
 178                                       invisible-fields visible-fields))))
 179
 180
 181 ;;; @ end
 182 ;;;
 183
 184 (provide 'mmexternal)
 185
 186 ;;; mmexternal.el ends here