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., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Code:
  26
  27 (require 'mmgeneric)
  28 (require 'mime)
  29 (require 'pces)
  30
  31 (eval-and-compile
  32   (luna-define-class mime-external-entity (mime-entity)
  33                      (body-buffer
  34                       body-file))
  35   (luna-define-internal-accessors 'mime-external-entity)
  36
  37   ;; In an external entity, information of media-type or other
  38   ;; information which are represented in a header in a non-external
  39   ;; entity are in the body of the parent entity.
  40   )
  41
  42 (luna-define-method mime-entity-name ((entity mime-external-entity))
  43   (concat "child of "
  44           (mime-entity-name
  45            (mime-entity-parent-internal entity))))
  46
  47
  48 (defun mmexternal-require-file-name (entity)
  49   (condition-case nil
  50       (or (mime-external-entity-body-file-internal entity)
  51           (let* ((ct (mime-entity-content-type
  52                       (mime-entity-parent-internal entity)))
  53                  (access-type
  54                   (mime-content-type-parameter ct "access-type")))
  55             (if (and access-type
  56                      (string= access-type "anon-ftp"))
  57                 (let ((site (mime-content-type-parameter ct "site"))
  58                       (directory
  59                        (mime-content-type-parameter ct "directory"))
  60                       (name (mime-content-type-parameter ct "name")))
  61                   (mime-external-entity-set-body-file-internal
  62                    entity
  63                    (expand-file-name
  64                     name
  65                     (concat "/anonymous@" site ":"
  66                             (file-name-as-directory directory))))))))
  67     (error (message "Can't make file-name of external-body."))))
  68
  69 (defun mmexternal-require-buffer (entity)
  70   (unless (and (mime-external-entity-body-buffer-internal entity)
  71                (buffer-live-p
  72                 (mime-external-entity-body-buffer-internal entity)))
  73     (condition-case nil
  74         (progn
  75           (mmexternal-require-file-name entity)
  76           (mime-external-entity-set-body-buffer-internal
  77            entity
  78            (with-current-buffer (get-buffer-create
  79                                  (concat " *Body of "
  80                                          (mime-entity-name entity)
  81                                          "*"))
  82              (binary-insert-file-contents
  83               (mime-external-entity-body-file-internal entity))
  84              (current-buffer))))
  85       (error (message "Can't get external-body.")))))
  86
  87
  88 ;;; @ entity
  89 ;;;
  90
  91 (luna-define-method mime-insert-entity ((entity mime-external-entity))
  92   (mime-insert-entity-body (mime-entity-parent-internal entity))
  93   (insert "\n")
  94   (mime-insert-entity-body entity))
  95
  96 (luna-define-method mime-write-entity ((entity mime-external-entity) filename)
  97   (with-temp-buffer
  98     (mime-insert-entity entity)
  99     (let ((coding-system-for-write 'raw-text-dos))
 100       (write-region (point-min) (point-max) filename))))
 101
 102
 103 ;;; @ entity header
 104 ;;;
 105
 106
 107 ;;; @ entity body
 108 ;;;
 109
 110 (luna-define-method mime-entity-body ((entity mime-external-entity))
 111   (mmexternal-require-buffer entity)
 112   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 113     (buffer-string)))
 114
 115 (luna-define-method mime-insert-entity-body ((entity mime-external-entity))
 116   (mmexternal-require-buffer entity)
 117   (insert-buffer-substring
 118    (mime-external-entity-body-buffer-internal entity)))
 119
 120 (luna-define-method mime-write-entity-body ((entity mime-external-entity)
 121                                             filename)
 122   (mmexternal-require-buffer entity)
 123   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 124     (binary-write-region (point-min) (point-max) filename)))
 125
 126
 127 ;;; @ entity content
 128 ;;;
 129
 130 (luna-define-method mime-entity-content ((entity mime-external-entity))
 131   (let ((ret (mime-entity-body entity)))
 132     (if ret
 133         (mime-decode-string ret (mime-entity-encoding entity))
 134       (message "Cannot get content")
 135       nil)))
 136
 137 (luna-define-method mime-insert-entity-content ((entity mime-external-entity))
 138   (insert (mime-entity-content entity)))
 139
 140 (luna-define-method mime-write-entity-content ((entity mime-external-entity)
 141                                                filename)
 142   (mmexternal-require-buffer entity)
 143   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 144     (mime-write-decoded-region (point-min) (point-max)
 145                                filename
 146                                (or (mime-entity-encoding entity) "7bit"))))
 147
 148
 149 ;;; @ header field
 150 ;;;
 151
 152 (luna-define-method mime-entity-fetch-field :around
 153   ((entity mime-external-entity) field-name)
 154   (or (luna-call-next-method)
 155       (with-temp-buffer
 156         (mime-insert-entity-body (mime-entity-parent-internal entity))
 157         (let ((ret (std11-fetch-field field-name)))
 158           (when ret
 159             (or (symbolp field-name)
 160                 (setq field-name
 161                       (intern (capitalize (capitalize field-name)))))
 162             (mime-entity-set-original-header-internal
 163              entity
 164              (put-alist field-name ret
 165                         (mime-entity-original-header-internal entity)))
 166             ret)))))
 167
 168 (luna-define-method mime-insert-header ((entity mime-external-entity)
 169                                         &optional invisible-fields
 170                                         visible-fields)
 171   (let ((the-buf (current-buffer))
 172         buf p-min p-max)
 173     (with-temp-buffer
 174       (mime-insert-entity-body (mime-entity-parent-internal entity))
 175       (setq buf (current-buffer)
 176             p-min (point-min)
 177             p-max (point-max))
 178       (set-buffer the-buf)
 179       (mime-insert-header-from-buffer buf p-min p-max
 180                                       invisible-fields visible-fields))))
 181
 182
 183 ;;; @ end
 184 ;;;
 185
 186 (provide 'mmexternal)
 187
 188 ;;; mmexternal.el ends here