mmbuffer.el

   1 ;;; mmbuffer.el --- MIME entity module for binary buffer
   2
   3 ;; Copyright (C) 1998,1999 Free Software Foundation, Inc.
   4 ;; Copyright (C) 1999 Electrotechnical Laboratory, JAPAN.
   5 ;; Licensed to the Free Software Foundation.
   6
   7 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
   8 ;; Keywords: MIME, multimedia, mail, news
   9
  10 ;; This file is part of FLIM (Faithful Library about Internet Message).
  11
  12 ;; This program is free software; you can redistribute it and/or
  13 ;; modify it under the terms of the GNU General Public License as
  14 ;; published by the Free Software Foundation; either version 2, or (at
  15 ;; your option) any later version.
  16
  17 ;; This program is distributed in the hope that it will be useful, but
  18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 ;; General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26
  27 ;;; Code:
  28
  29 (require 'mime)
  30
  31 (eval-and-compile
  32   (luna-define-class mime-buffer-entity (mime-entity)
  33                      (buffer
  34                       header-start
  35                       header-end
  36                       body-start
  37                       body-end))
  38
  39   (luna-define-internal-accessors 'mime-buffer-entity)
  40   )
  41
  42 (luna-define-method initialize-instance :after ((entity mime-buffer-entity)
  43                                                 &rest init-args)
  44   (or (mime-buffer-entity-buffer-internal entity)
  45       (mime-buffer-entity-set-buffer-internal
  46        entity (mime-entity-location-internal entity)))
  47   (save-excursion
  48     (set-buffer (mime-buffer-entity-buffer-internal entity))
  49     (if (mime-root-entity-p entity)
  50         (setq mime-message-structure entity))
  51     (let ((header-start
  52            (or (mime-buffer-entity-header-start-internal entity)
  53                (mime-buffer-entity-set-header-start-internal
  54                 entity (point-min))))
  55           (header-end (mime-buffer-entity-header-end-internal entity))
  56           (body-start (mime-buffer-entity-body-start-internal entity))
  57           (body-end
  58            (or (mime-buffer-entity-body-end-internal entity)
  59                (mime-buffer-entity-set-body-end-internal entity (point-max)))))
  60       (goto-char header-start)
  61       (unless (and header-end body-start)
  62         (if (re-search-forward "^$" body-end t)
  63             (setq header-end (match-end 0)
  64                   body-start (if (= header-end body-end)
  65                                  body-end
  66                                (1+ header-end)))
  67           (setq header-end (point-min)
  68                 body-start (point-min)))
  69         (mime-buffer-entity-set-header-end-internal entity header-end)
  70         (mime-buffer-entity-set-body-start-internal entity body-start)
  71         )
  72       (or (mime-entity-content-type-internal entity)
  73           (save-restriction
  74             (narrow-to-region header-start header-end)
  75             (mime-entity-set-content-type-internal
  76              entity
  77              (let ((str (std11-fetch-field "Content-Type")))
  78                (if str
  79                    (mime-parse-Content-Type str)
  80                  )))
  81             ))
  82       ))
  83   entity)
  84
  85 (luna-define-method mime-entity-name ((entity mime-buffer-entity))
  86   (buffer-name (mime-buffer-entity-buffer-internal entity))
  87   )
  88
  89
  90 (luna-define-method mime-entity-children ((entity mime-buffer-entity))
  91   (let* ((content-type (mime-entity-content-type entity))
  92          (primary-type (mime-content-type-primary-type content-type)))
  93     (cond ((eq primary-type 'multipart)
  94            (mime-parse-multipart entity)
  95            )
  96           ((and (eq primary-type 'message)
  97                 (memq (mime-content-type-subtype content-type)
  98                       '(rfc822 news external-body)
  99                       ))
 100            (mime-parse-encapsulated entity)
 101            ))
 102     ))
 103
 104
 105 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
 106   (or (catch 'found
 107         (while visible-fields
 108           (let ((regexp (car visible-fields)))
 109             (if (string-match regexp field-name)
 110                 (throw 'found t)
 111               ))
 112           (setq visible-fields (cdr visible-fields))
 113           ))
 114       (catch 'found
 115         (while invisible-fields
 116           (let ((regexp (car invisible-fields)))
 117             (if (string-match regexp field-name)
 118                 (throw 'found nil)
 119               ))
 120           (setq invisible-fields (cdr invisible-fields))
 121           )
 122         t)))
 123
 124 (defun mime-insert-header-from-buffer (buffer start end
 125                                               &optional invisible-fields
 126                                               visible-fields)
 127   (let ((the-buf (current-buffer))
 128         (mode-obj (mime-find-field-presentation-method 'wide))
 129         field-decoder
 130         f-b p f-e field-name len field field-body)
 131     (save-excursion
 132       (set-buffer buffer)
 133       (save-restriction
 134         (narrow-to-region start end)
 135         (goto-char start)
 136         (while (re-search-forward std11-field-head-regexp nil t)
 137           (setq f-b (match-beginning 0)
 138                 p (match-end 0)
 139                 field-name (buffer-substring f-b p)
 140                 len (string-width field-name)
 141                 f-e (std11-field-end))
 142           (when (mime-visible-field-p field-name
 143                                       visible-fields invisible-fields)
 144             (setq field (intern
 145                          (capitalize (buffer-substring f-b (1- p))))
 146                   field-body (buffer-substring p f-e)
 147                   field-decoder (inline (mime-find-field-decoder-internal
 148                                          field mode-obj)))
 149             (with-current-buffer the-buf
 150               (insert field-name)
 151               (insert (if field-decoder
 152                           (funcall field-decoder field-body len)
 153                         ;; Don't decode
 154                         field-body))
 155               (insert "\n")
 156               )))))))
 157
 158 (luna-define-method mime-insert-header ((entity mime-buffer-entity)
 159                                         &optional invisible-fields
 160                                         visible-fields)
 161   (mime-insert-header-from-buffer
 162    (mime-buffer-entity-buffer-internal entity)
 163    (mime-buffer-entity-header-start-internal entity)
 164    (mime-buffer-entity-header-end-internal entity)
 165    invisible-fields visible-fields)
 166   )
 167
 168 (luna-define-method mime-entity-content ((entity mime-buffer-entity))
 169   (save-excursion
 170     (set-buffer (mime-buffer-entity-buffer-internal entity))
 171     (mime-decode-string
 172      (buffer-substring (mime-buffer-entity-body-start-internal entity)
 173                        (mime-buffer-entity-body-end-internal entity))
 174      (mime-entity-encoding entity))))
 175
 176 (luna-define-method mime-insert-text-content ((entity mime-buffer-entity))
 177   (insert
 178    (decode-mime-charset-string (mime-entity-content entity)
 179                                (or (mime-content-type-parameter
 180                                     (mime-entity-content-type entity)
 181                                     "charset")
 182                                    default-mime-charset)
 183                                'CRLF)
 184    ))
 185
 186 ;;; redefine to speed up
 187
 188 (mm-define-method entity-point-min ((entity buffer))
 189   (mime-buffer-entity-header-start-internal entity))
 190
 191 (mm-define-method entity-point-max ((entity buffer))
 192   (mime-buffer-entity-body-end-internal entity))
 193
 194 (luna-define-method mime-entity-fetch-field :around
 195   ((entity mime-buffer-entity) field-name)
 196   (or (luna-call-next-method)
 197       (save-excursion
 198         (set-buffer (mime-buffer-entity-buffer-internal entity))
 199         (save-restriction
 200           (narrow-to-region (mime-buffer-entity-header-start-internal entity)
 201                             (mime-buffer-entity-header-end-internal entity))
 202           (let ((ret (std11-fetch-field field-name)))
 203             (when ret
 204               (or (symbolp field-name)
 205                   (setq field-name
 206                         (intern (capitalize (capitalize field-name)))))
 207               (mime-entity-set-original-header-internal
 208                entity
 209                (put-alist field-name ret
 210                           (mime-entity-original-header-internal entity)))
 211               ret))))))
 212
 213 (mm-define-method insert-entity-content ((entity buffer))
 214   (insert (with-current-buffer (mime-buffer-entity-buffer-internal entity)
 215             (mime-decode-string
 216              (buffer-substring (mime-buffer-entity-body-start-internal entity)
 217                                (mime-buffer-entity-body-end-internal entity))
 218              (mime-entity-encoding entity)))))
 219
 220 (mm-define-method write-entity-content ((entity buffer) filename)
 221   (save-excursion
 222     (set-buffer (mime-buffer-entity-buffer-internal entity))
 223     (mime-write-decoded-region (mime-buffer-entity-body-start-internal entity)
 224                                (mime-buffer-entity-body-end-internal entity)
 225                                filename
 226                                (or (mime-entity-encoding entity) "7bit"))
 227     ))
 228
 229 (mm-define-method insert-entity ((entity buffer))
 230   (insert-buffer-substring (mime-buffer-entity-buffer-internal entity)
 231                            (mime-buffer-entity-header-start-internal entity)
 232                            (mime-buffer-entity-body-end-internal entity))
 233   )
 234
 235 (mm-define-method write-entity ((entity buffer) filename)
 236   (save-excursion
 237     (set-buffer (mime-buffer-entity-buffer-internal entity))
 238     (write-region-as-raw-text-CRLF
 239      (mime-buffer-entity-header-start-internal entity)
 240      (mime-buffer-entity-body-end-internal entity)
 241      filename)
 242     ))
 243
 244 (mm-define-method write-entity-body ((entity buffer) filename)
 245   (save-excursion
 246     (set-buffer (mime-buffer-entity-buffer-internal entity))
 247     (write-region-as-binary (mime-buffer-entity-body-start-internal entity)
 248                             (mime-buffer-entity-body-end-internal entity)
 249                             filename)
 250     ))
 251
 252
 253 ;;; @ buffer
 254 ;;;
 255
 256 (luna-define-method mime-entity-header-buffer ((entity mime-buffer-entity))
 257   (mime-buffer-entity-buffer-internal entity)
 258   )
 259
 260 (luna-define-method mime-entity-body-buffer ((entity mime-buffer-entity))
 261   (mime-buffer-entity-buffer-internal entity)
 262   )
 263
 264 (luna-define-method mime-entity-buffer ((entity mime-buffer-entity))
 265   (mime-buffer-entity-buffer-internal entity)
 266   )
 267
 268 (luna-define-method mime-entity-body-start-point ((entity mime-buffer-entity))
 269   (mime-buffer-entity-body-start-internal entity)
 270   )
 271
 272 (luna-define-method mime-entity-body-end-point ((entity mime-buffer-entity))
 273   (mime-buffer-entity-body-end-internal entity)
 274   )
 275
 276 (luna-define-method mime-entity-point-min ((entity mime-buffer-entity))
 277   (mime-buffer-entity-header-start-internal entity)
 278   )
 279
 280 (luna-define-method mime-entity-point-max ((entity mime-buffer-entity))
 281   (mime-buffer-entity-body-end-internal entity)
 282   )
 283
 284 (luna-define-method mime-goto-header-start-point ((entity mime-buffer-entity))
 285   (set-buffer (mime-buffer-entity-buffer-internal entity))
 286   (goto-char (mime-buffer-entity-header-start-internal entity))
 287   )
 288
 289 (luna-define-method mime-goto-body-start-point ((entity mime-buffer-entity))
 290   (set-buffer (mime-buffer-entity-buffer-internal entity))
 291   (goto-char (mime-buffer-entity-body-start-internal entity))
 292   )
 293
 294 (luna-define-method mime-goto-body-end-point ((entity mime-buffer-entity))
 295   (set-buffer (mime-buffer-entity-buffer-internal entity))
 296   (goto-char (mime-buffer-entity-body-end-internal entity))
 297   )
 298
 299
 300 ;;; @ end
 301 ;;;
 302
 303 (provide 'mmbuffer)
 304
 305 ;;; mmbuffer.el ends here