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 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
  91   (or (catch 'found
  92         (while visible-fields
  93           (let ((regexp (car visible-fields)))
  94             (if (string-match regexp field-name)
  95                 (throw 'found t)
  96               ))
  97           (setq visible-fields (cdr visible-fields))
  98           ))
  99       (catch 'found
 100         (while invisible-fields
 101           (let ((regexp (car invisible-fields)))
 102             (if (string-match regexp field-name)
 103                 (throw 'found nil)
 104               ))
 105           (setq invisible-fields (cdr invisible-fields))
 106           )
 107         t)))
 108
 109 (defun mime-insert-header-from-buffer (buffer start end
 110                                               &optional invisible-fields
 111                                               visible-fields)
 112   (let ((the-buf (current-buffer))
 113         (mode-obj (mime-find-field-presentation-method 'wide))
 114         field-decoder
 115         f-b p f-e field-name len field field-body)
 116     (save-excursion
 117       (set-buffer buffer)
 118       (save-restriction
 119         (narrow-to-region start end)
 120         (goto-char start)
 121         (while (re-search-forward std11-field-head-regexp nil t)
 122           (setq f-b (match-beginning 0)
 123                 p (match-end 0)
 124                 field-name (buffer-substring f-b p)
 125                 len (string-width field-name)
 126                 f-e (std11-field-end))
 127           (when (mime-visible-field-p field-name
 128                                       visible-fields invisible-fields)
 129             (setq field (intern
 130                          (capitalize (buffer-substring f-b (1- p))))
 131                   field-body (buffer-substring p f-e)
 132                   field-decoder (inline (mime-find-field-decoder-internal
 133                                          field mode-obj)))
 134             (with-current-buffer the-buf
 135               (insert field-name)
 136               (insert (if field-decoder
 137                           (funcall field-decoder field-body len)
 138                         ;; Don't decode
 139                         field-body))
 140               (insert "\n")
 141               )))))))
 142
 143 (luna-define-method mime-insert-header ((entity mime-buffer-entity)
 144                                         &optional invisible-fields
 145                                         visible-fields)
 146   (mime-insert-header-from-buffer
 147    (mime-buffer-entity-buffer-internal entity)
 148    (mime-buffer-entity-header-start-internal entity)
 149    (mime-buffer-entity-header-end-internal entity)
 150    invisible-fields visible-fields)
 151   )
 152
 153 (luna-define-method mime-entity-content ((entity mime-buffer-entity))
 154   (save-excursion
 155     (set-buffer (mime-buffer-entity-buffer-internal entity))
 156     (mime-decode-string
 157      (buffer-substring (mime-buffer-entity-body-start-internal entity)
 158                        (mime-buffer-entity-body-end-internal entity))
 159      (mime-entity-encoding entity))))
 160
 161 (luna-define-method mime-entity-fetch-field :around
 162   ((entity mime-buffer-entity) field-name)
 163   (or (luna-call-next-method)
 164       (save-excursion
 165         (set-buffer (mime-buffer-entity-buffer-internal entity))
 166         (save-restriction
 167           (narrow-to-region (mime-buffer-entity-header-start-internal entity)
 168                             (mime-buffer-entity-header-end-internal entity))
 169           (let ((ret (std11-fetch-field field-name)))
 170             (when ret
 171               (or (symbolp field-name)
 172                   (setq field-name
 173                         (intern (capitalize (capitalize field-name)))))
 174               (mime-entity-set-original-header-internal
 175                entity
 176                (put-alist field-name ret
 177                           (mime-entity-original-header-internal entity)))
 178               ret))))))
 179
 180 (mm-define-method insert-entity-content ((entity buffer))
 181   (insert (with-current-buffer (mime-buffer-entity-buffer-internal entity)
 182             (mime-decode-string
 183              (buffer-substring (mime-buffer-entity-body-start-internal entity)
 184                                (mime-buffer-entity-body-end-internal entity))
 185              (mime-entity-encoding entity)))))
 186
 187 (mm-define-method write-entity-content ((entity buffer) filename)
 188   (save-excursion
 189     (set-buffer (mime-buffer-entity-buffer-internal entity))
 190     (mime-write-decoded-region (mime-buffer-entity-body-start-internal entity)
 191                                (mime-buffer-entity-body-end-internal entity)
 192                                filename
 193                                (or (mime-entity-encoding entity) "7bit"))
 194     ))
 195
 196 (mm-define-method insert-entity ((entity buffer))
 197   (insert-buffer-substring (mime-buffer-entity-buffer-internal entity)
 198                            (mime-buffer-entity-header-start-internal entity)
 199                            (mime-buffer-entity-body-end-internal entity))
 200   )
 201
 202 (mm-define-method write-entity ((entity buffer) filename)
 203   (save-excursion
 204     (set-buffer (mime-buffer-entity-buffer-internal entity))
 205     (write-region-as-raw-text-CRLF
 206      (mime-buffer-entity-header-start-internal entity)
 207      (mime-buffer-entity-body-end-internal entity)
 208      filename)
 209     ))
 210
 211 (mm-define-method write-entity-body ((entity buffer) filename)
 212   (save-excursion
 213     (set-buffer (mime-buffer-entity-buffer-internal entity))
 214     (write-region-as-binary (mime-buffer-entity-body-start-internal entity)
 215                             (mime-buffer-entity-body-end-internal entity)
 216                             filename)
 217     ))
 218
 219
 220 ;;; @ header buffer
 221 ;;;
 222
 223 (luna-define-method mime-entity-header-buffer ((entity mime-buffer-entity))
 224   (mime-buffer-entity-buffer-internal entity)
 225   )
 226
 227 (luna-define-method mime-goto-header-start-point ((entity mime-buffer-entity))
 228   (set-buffer (mime-buffer-entity-buffer-internal entity))
 229   (goto-char (mime-buffer-entity-header-start-internal entity))
 230   )
 231
 232 (luna-define-method mime-entity-header-start-point ((entity
 233                                                      mime-buffer-entity))
 234   (mime-buffer-entity-header-start-internal entity)
 235   )
 236
 237 (luna-define-method mime-entity-header-end-point ((entity
 238                                                    mime-buffer-entity))
 239   (mime-buffer-entity-header-end-internal entity)
 240   )
 241
 242
 243 ;;; @ body buffer
 244 ;;;
 245
 246 (luna-define-method mime-entity-body-buffer ((entity mime-buffer-entity))
 247   (mime-buffer-entity-buffer-internal entity)
 248   )
 249
 250 (luna-define-method mime-goto-body-start-point ((entity mime-buffer-entity))
 251   (set-buffer (mime-buffer-entity-buffer-internal entity))
 252   (goto-char (mime-buffer-entity-body-start-internal entity))
 253   )
 254
 255 (luna-define-method mime-goto-body-end-point ((entity mime-buffer-entity))
 256   (set-buffer (mime-buffer-entity-buffer-internal entity))
 257   (goto-char (mime-buffer-entity-body-end-internal entity))
 258   )
 259
 260 (luna-define-method mime-entity-body-start-point ((entity mime-buffer-entity))
 261   (mime-buffer-entity-body-start-internal entity)
 262   )
 263
 264 (luna-define-method mime-entity-body-end-point ((entity mime-buffer-entity))
 265   (mime-buffer-entity-body-end-internal entity)
 266   )
 267
 268
 269 ;;; @ buffer (obsolete)
 270 ;;;
 271
 272 (luna-define-method mime-entity-buffer ((entity mime-buffer-entity))
 273   (mime-buffer-entity-buffer-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
 285 ;;; @ end
 286 ;;;
 287
 288 (provide 'mmbuffer)
 289
 290 ;;; mmbuffer.el ends here