mmbuffer.el

   1 ;;; mmbuffer.el --- MIME entity module for binary 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
  30 (eval-and-compile
  31   (luna-define-class mime-buffer-entity (mime-entity)
  32                      (buffer
  33                       header-start
  34                       header-end
  35                       body-start
  36                       body-end))
  37
  38   (luna-define-internal-accessors 'mime-buffer-entity)
  39   )
  40
  41 (luna-define-method initialize-instance :after ((entity mime-buffer-entity)
  42                                                 &rest init-args)
  43   (or (mime-buffer-entity-buffer-internal entity)
  44       (mime-buffer-entity-set-buffer-internal
  45        entity (mime-entity-location-internal entity)))
  46   (save-excursion
  47     (set-buffer (mime-buffer-entity-buffer-internal entity))
  48     (if (mime-root-entity-p entity)
  49         (setq mime-message-structure entity))
  50     (let ((header-start
  51            (or (mime-buffer-entity-header-start-internal entity)
  52                (mime-buffer-entity-set-header-start-internal
  53                 entity (point-min))))
  54           (header-end (mime-buffer-entity-header-end-internal entity))
  55           (body-start (mime-buffer-entity-body-start-internal entity))
  56           (body-end
  57            (or (mime-buffer-entity-body-end-internal entity)
  58                (mime-buffer-entity-set-body-end-internal entity (point-max)))))
  59       (goto-char header-start)
  60       (unless (and header-end body-start)
  61         (if (re-search-forward "^$" body-end t)
  62             (setq header-end (match-end 0)
  63                   body-start (if (= header-end body-end)
  64                                  body-end
  65                                (1+ header-end)))
  66           (setq header-end (point-min)
  67                 body-start (point-min)))
  68         (mime-buffer-entity-set-header-end-internal entity header-end)
  69         (mime-buffer-entity-set-body-start-internal entity body-start)
  70         )
  71       (or (mime-entity-content-type-internal entity)
  72           (save-restriction
  73             (narrow-to-region header-start header-end)
  74             (mime-entity-set-content-type-internal
  75              entity
  76              (let ((str (std11-fetch-field "Content-Type")))
  77                (if str
  78                    (mime-parse-Content-Type str)
  79                  )))
  80             ))
  81       ))
  82   entity)
  83
  84 (luna-define-method mime-entity-name ((entity mime-buffer-entity))
  85   (buffer-name (mime-buffer-entity-buffer-internal entity))
  86   )
  87
  88
  89 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
  90   (or (catch 'found
  91         (while visible-fields
  92           (let ((regexp (car visible-fields)))
  93             (if (string-match regexp field-name)
  94                 (throw 'found t)
  95               ))
  96           (setq visible-fields (cdr visible-fields))
  97           ))
  98       (catch 'found
  99         (while invisible-fields
 100           (let ((regexp (car invisible-fields)))
 101             (if (string-match regexp field-name)
 102                 (throw 'found nil)
 103               ))
 104           (setq invisible-fields (cdr invisible-fields))
 105           )
 106         t)))
 107
 108 (defun mime-insert-header-from-buffer (buffer start end
 109                                               &optional invisible-fields
 110                                               visible-fields)
 111   (let ((the-buf (current-buffer))
 112         (mode-obj (mime-find-field-presentation-method 'wide))
 113         field-decoder
 114         f-b p f-e field-name len field field-body)
 115     (save-excursion
 116       (set-buffer buffer)
 117       (save-restriction
 118         (narrow-to-region start end)
 119         (goto-char start)
 120         (while (re-search-forward std11-field-head-regexp nil t)
 121           (setq f-b (match-beginning 0)
 122                 p (match-end 0)
 123                 field-name (buffer-substring f-b p)
 124                 len (string-width field-name)
 125                 f-e (std11-field-end))
 126           (when (mime-visible-field-p field-name
 127                                       visible-fields invisible-fields)
 128             (setq field (intern
 129                          (capitalize (buffer-substring f-b (1- p))))
 130                   field-body (buffer-substring p f-e)
 131                   field-decoder (inline (mime-find-field-decoder-internal
 132                                          field mode-obj)))
 133             (with-current-buffer the-buf
 134               (insert field-name)
 135               (insert (if field-decoder
 136                           (funcall field-decoder field-body len)
 137                         ;; Don't decode
 138                         field-body))
 139               (insert "\n")
 140               )))))))
 141
 142 (luna-define-method mime-insert-header ((entity mime-buffer-entity)
 143                                         &optional invisible-fields
 144                                         visible-fields)
 145   (mime-insert-header-from-buffer
 146    (mime-buffer-entity-buffer-internal entity)
 147    (mime-buffer-entity-header-start-internal entity)
 148    (mime-buffer-entity-header-end-internal entity)
 149    invisible-fields visible-fields)
 150   )
 151
 152 (luna-define-method mime-entity-content ((entity mime-buffer-entity))
 153   (save-excursion
 154     (set-buffer (mime-buffer-entity-buffer-internal entity))
 155     (mime-decode-string
 156      (buffer-substring (mime-buffer-entity-body-start-internal entity)
 157                        (mime-buffer-entity-body-end-internal entity))
 158      (mime-entity-encoding entity))))
 159
 160 (luna-define-method mime-entity-fetch-field :around
 161   ((entity mime-buffer-entity) field-name)
 162   (or (luna-call-next-method)
 163       (save-excursion
 164         (set-buffer (mime-buffer-entity-buffer-internal entity))
 165         (save-restriction
 166           (narrow-to-region (mime-buffer-entity-header-start-internal entity)
 167                             (mime-buffer-entity-header-end-internal entity))
 168           (let ((ret (std11-fetch-field field-name)))
 169             (when ret
 170               (or (symbolp field-name)
 171                   (setq field-name
 172                         (intern (capitalize (capitalize field-name)))))
 173               (mime-entity-set-original-header-internal
 174                entity
 175                (put-alist field-name ret
 176                           (mime-entity-original-header-internal entity)))
 177               ret))))))
 178
 179 (mm-define-method insert-entity-content ((entity buffer))
 180   (insert (with-current-buffer (mime-buffer-entity-buffer-internal entity)
 181             (mime-decode-string
 182              (buffer-substring (mime-buffer-entity-body-start-internal entity)
 183                                (mime-buffer-entity-body-end-internal entity))
 184              (mime-entity-encoding entity)))))
 185
 186 (mm-define-method write-entity-content ((entity buffer) filename)
 187   (save-excursion
 188     (set-buffer (mime-buffer-entity-buffer-internal entity))
 189     (mime-write-decoded-region (mime-buffer-entity-body-start-internal entity)
 190                                (mime-buffer-entity-body-end-internal entity)
 191                                filename
 192                                (or (mime-entity-encoding entity) "7bit"))
 193     ))
 194
 195 (mm-define-method insert-entity ((entity buffer))
 196   (insert-buffer-substring (mime-buffer-entity-buffer-internal entity)
 197                            (mime-buffer-entity-header-start-internal entity)
 198                            (mime-buffer-entity-body-end-internal entity))
 199   )
 200
 201 (mm-define-method write-entity ((entity buffer) filename)
 202   (save-excursion
 203     (set-buffer (mime-buffer-entity-buffer-internal entity))
 204     (write-region-as-raw-text-CRLF
 205      (mime-buffer-entity-header-start-internal entity)
 206      (mime-buffer-entity-body-end-internal entity)
 207      filename)
 208     ))
 209
 210 (mm-define-method write-entity-body ((entity buffer) filename)
 211   (save-excursion
 212     (set-buffer (mime-buffer-entity-buffer-internal entity))
 213     (write-region-as-binary (mime-buffer-entity-body-start-internal entity)
 214                             (mime-buffer-entity-body-end-internal entity)
 215                             filename)
 216     ))
 217
 218
 219 ;;; @ header buffer
 220 ;;;
 221
 222 (luna-define-method mime-entity-header-buffer ((entity mime-buffer-entity))
 223   (mime-buffer-entity-buffer-internal entity)
 224   )
 225
 226 (luna-define-method mime-goto-header-start-point ((entity mime-buffer-entity))
 227   (set-buffer (mime-buffer-entity-buffer-internal entity))
 228   (goto-char (mime-buffer-entity-header-start-internal entity))
 229   )
 230
 231 (luna-define-method mime-entity-header-start-point ((entity
 232                                                      mime-buffer-entity))
 233   (mime-buffer-entity-header-start-internal entity)
 234   )
 235
 236 (luna-define-method mime-entity-header-end-point ((entity
 237                                                    mime-buffer-entity))
 238   (mime-buffer-entity-header-end-internal entity)
 239   )
 240
 241
 242 ;;; @ body buffer
 243 ;;;
 244
 245 (luna-define-method mime-entity-body-buffer ((entity mime-buffer-entity))
 246   (mime-buffer-entity-buffer-internal entity)
 247   )
 248
 249 (luna-define-method mime-goto-body-start-point ((entity mime-buffer-entity))
 250   (set-buffer (mime-buffer-entity-buffer-internal entity))
 251   (goto-char (mime-buffer-entity-body-start-internal entity))
 252   )
 253
 254 (luna-define-method mime-goto-body-end-point ((entity mime-buffer-entity))
 255   (set-buffer (mime-buffer-entity-buffer-internal entity))
 256   (goto-char (mime-buffer-entity-body-end-internal entity))
 257   )
 258
 259 (luna-define-method mime-entity-body-start-point ((entity mime-buffer-entity))
 260   (mime-buffer-entity-body-start-internal entity)
 261   )
 262
 263 (luna-define-method mime-entity-body-end-point ((entity mime-buffer-entity))
 264   (mime-buffer-entity-body-end-internal entity)
 265   )
 266
 267
 268 ;;; @ buffer (obsolete)
 269 ;;;
 270
 271 (luna-define-method mime-entity-buffer ((entity mime-buffer-entity))
 272   (mime-buffer-entity-buffer-internal entity)
 273   )
 274
 275 (luna-define-method mime-entity-point-min ((entity mime-buffer-entity))
 276   (mime-buffer-entity-header-start-internal entity)
 277   )
 278
 279 (luna-define-method mime-entity-point-max ((entity mime-buffer-entity))
 280   (mime-buffer-entity-body-end-internal entity)
 281   )
 282
 283
 284 ;;; @ end
 285 ;;;
 286
 287 (provide 'mmbuffer)
 288
 289 ;;; mmbuffer.el ends here