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 'mime)
  28 (require 'pces)
  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 initialize-instance :after ((entity mime-external-entity)
  42                                                 &rest init-args)
  43   (or (mime-external-entity-body-file-internal entity)
  44       (let* ((ct (mime-entity-content-type
  45                   (mime-entity-parent-internal entity)))
  46              (access-type (mime-content-type-parameter ct "access-type")))
  47         (if (and access-type
  48                  (string= access-type "anon-ftp"))
  49             (let ((site (mime-content-type-parameter ct "site"))
  50                   (directory (mime-content-type-parameter ct "directory"))
  51                   (name (mime-content-type-parameter ct "name")))
  52               (mime-external-entity-set-body-file-internal
  53                entity
  54                (expand-file-name
  55                 name
  56                 (concat "/anonymous@" site ":" directory)))))))
  57   entity)
  58
  59 (luna-define-method mime-entity-name ((entity mime-external-entity))
  60   (concat "child of "
  61           (mime-entity-name
  62            (mime-entity-parent-internal entity))))
  63
  64
  65 (defun mmexternal-require-buffer (entity)
  66   (unless (and (mime-external-entity-body-buffer-internal entity)
  67                (buffer-live-p
  68                 (mime-external-entity-body-buffer-internal entity)))
  69     (condition-case nil
  70         (mime-external-entity-set-body-buffer-internal
  71          entity
  72          (with-current-buffer (get-buffer-create
  73                                (concat " *Body of "
  74                                        (mime-entity-name entity)
  75                                        "*"))
  76            (insert-file-contents-as-binary
  77             (mime-external-entity-body-file-internal entity))
  78            (current-buffer)))
  79       (error (message "Can't get external-body.")))))
  80
  81
  82 ;;; @ entity
  83 ;;;
  84
  85 (luna-define-method mime-insert-entity ((entity mime-external-entity))
  86   (mime-insert-entity-body (mime-entity-parent-internal entity))
  87   (insert "\n")
  88   (mime-insert-entity-body entity))
  89
  90 (luna-define-method mime-write-entity ((entity mime-external-entity) filename)
  91   (with-temp-buffer
  92     (mime-insert-entity entity)
  93     (write-region-as-raw-text-CRLF (point-min) (point-max) filename)))
  94
  95
  96 ;;; @ entity header
  97 ;;;
  98
  99
 100 ;;; @ entity body
 101 ;;;
 102
 103 (luna-define-method mime-entity-body ((entity mime-external-entity))
 104   (mmexternal-require-buffer entity)
 105   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 106     (buffer-string)))
 107
 108 (luna-define-method mime-insert-entity-body ((entity mime-external-entity))
 109   (mmexternal-require-buffer entity)
 110   (insert-buffer-substring
 111    (mime-external-entity-body-buffer-internal entity)))
 112
 113 (luna-define-method mime-write-entity-body ((entity mime-external-entity)
 114                                             filename)
 115   (mmexternal-require-buffer entity)
 116   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 117     (write-region-as-binary (point-min) (point-max) filename)))
 118
 119
 120 ;;; @ entity content
 121 ;;;
 122
 123 (luna-define-method mime-entity-content ((entity mime-external-entity))
 124   (let ((ret (mime-entity-body entity)))
 125     (if ret
 126         (mime-decode-string ret (mime-entity-encoding entity))
 127       (message "Cannot get content")
 128       nil)))
 129
 130 (luna-define-method mime-insert-entity-content ((entity mime-external-entity))
 131   (insert (mime-entity-content entity)))
 132
 133 (luna-define-method mime-write-entity-content ((entity mime-external-entity)
 134                                                filename)
 135   (mmexternal-require-buffer entity)
 136   (with-current-buffer (mime-external-entity-body-buffer-internal entity)
 137     (mime-write-decoded-region (point-min) (point-max)
 138                                filename
 139                                (or (mime-entity-encoding entity) "7bit"))))
 140
 141
 142 ;;; @ header field
 143 ;;;
 144
 145 (luna-define-method mime-entity-fetch-field :around
 146   ((entity mime-external-entity) field-name)
 147   (or (luna-call-next-method)
 148       (with-temp-buffer
 149         (mime-insert-entity-body (mime-entity-parent-internal entity))
 150         (let ((ret (std11-fetch-field field-name)))
 151           (when ret
 152             (or (symbolp field-name)
 153                 (setq field-name
 154                       (intern (capitalize (capitalize field-name)))))
 155             (mime-entity-set-original-header-internal
 156              entity
 157              (put-alist field-name ret
 158                         (mime-entity-original-header-internal entity)))
 159             ret)))))
 160
 161 (luna-define-method mime-insert-header ((entity mime-external-entity)
 162                                         &optional invisible-fields
 163                                         visible-fields)
 164   (let ((the-buf (current-buffer))
 165         buf p-min p-max)
 166     (with-temp-buffer
 167       (mime-insert-entity-body (mime-entity-parent-internal entity))
 168       (setq buf (current-buffer)
 169             p-min (point-min)
 170             p-max (point-max))
 171       (set-buffer the-buf)
 172       (mime-insert-header-from-buffer buf p-min p-max
 173                                       invisible-fields visible-fields))))
 174
 175
 176 ;;; @ end
 177 ;;;
 178
 179 (provide 'mmexternal)
 180
 181 ;;; mmexternal.el ends here