mime/mmgeneric.el

   1 ;;; mmgeneric.el --- MIME generic entity module
   2
   3 ;; Copyright (C) 1995,96,97,98,99,2000 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
   6 ;; Keywords: definition, 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 'luna)
  28
  29 (eval-when-compile
  30   (require 'eword-decode) ; mime-find-field-presentation-method
  31   )
  32
  33
  34 ;;; @ MIME entity
  35 ;;;
  36
  37 (autoload 'mime-entity-content-type "mime")
  38 (autoload 'mime-parse-multipart "mime-parse")
  39 (autoload 'mime-parse-message "mime-parse")
  40 ;; (autoload 'mime-parse-encapsulated "mime-parse")
  41 ;; (autoload 'mime-parse-external "mime-parse")
  42 (autoload 'mime-entity-content "mime")
  43
  44 (eval-and-compile
  45   (luna-define-class mime-entity ()
  46                      (location
  47                       content-type children parent
  48                       node-id
  49                       content-disposition encoding
  50                       ;; for other fields
  51                       original-header parsed-header))
  52
  53   (luna-define-internal-accessors 'mime-entity)
  54   )
  55
  56 (defalias 'mime-entity-representation-type-internal 'luna-class-name)
  57 (defalias 'mime-entity-set-representation-type-internal 'luna-set-class-name)
  58
  59 (luna-define-method mime-entity-fetch-field ((entity mime-entity)
  60                                              field-name)
  61   (or (symbolp field-name)
  62       (setq field-name (intern (capitalize field-name))))
  63   (cdr (assq field-name
  64              (mime-entity-original-header-internal entity))))
  65
  66 (luna-define-method mime-insert-text-content ((entity mime-entity))
  67   (insert
  68    (decode-mime-charset-string (mime-entity-content entity)
  69                                (or (mime-content-type-parameter
  70                                     (mime-entity-content-type entity)
  71                                     "charset")
  72                                    default-mime-charset)
  73                                'CRLF)
  74    ))
  75
  76
  77 ;;; @ for mm-backend
  78 ;;;
  79
  80 (defmacro mm-expand-class-name (type)
  81   `(intern (format "mime-%s-entity" ,type)))
  82
  83 (defmacro mm-define-backend (type &optional parents)
  84   `(luna-define-class ,(mm-expand-class-name type)
  85                       ,(nconc (mapcar (lambda (parent)
  86                                         (mm-expand-class-name parent)
  87                                         )
  88                                       parents)
  89                               '(mime-entity))))
  90
  91 (defmacro mm-define-method (name args &rest body)
  92   (or (eq name 'initialize-instance)
  93       (setq name (intern (format "mime-%s" name))))
  94   (let ((spec (car args)))
  95     (setq args
  96           (cons (list (car spec)
  97                       (mm-expand-class-name (nth 1 spec)))
  98                 (cdr args)))
  99     `(luna-define-method ,name ,args ,@body)
 100     ))
 101
 102 (put 'mm-define-method 'lisp-indent-function 'defun)
 103
 104 (def-edebug-spec mm-define-method
 105   (&define name ((arg symbolp)
 106                  [&rest arg]
 107                  [&optional ["&optional" arg &rest arg]]
 108                  &optional ["&rest" arg]
 109                  )
 110            def-body))
 111
 112
 113 ;;; @ header filter
 114 ;;;
 115
 116 ;; [tomo] We should think about specification of better filtering
 117 ;; mechanism.  Please discuss in the emacs-mime mailing lists.
 118
 119 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
 120   (or (catch 'found
 121         (while visible-fields
 122           (let ((regexp (car visible-fields)))
 123             (if (string-match regexp field-name)
 124                 (throw 'found t)
 125               ))
 126           (setq visible-fields (cdr visible-fields))
 127           ))
 128       (catch 'found
 129         (while invisible-fields
 130           (let ((regexp (car invisible-fields)))
 131             (if (string-match regexp field-name)
 132                 (throw 'found nil)
 133               ))
 134           (setq invisible-fields (cdr invisible-fields))
 135           )
 136         t)))
 137
 138 (defun mime-insert-header-from-buffer (buffer start end
 139                                               &optional invisible-fields
 140                                               visible-fields)
 141   (let ((the-buf (current-buffer))
 142         (mode-obj (mime-find-field-presentation-method 'wide))
 143         field-decoder
 144         f-b p f-e field-name len field field-body)
 145     (save-excursion
 146       (set-buffer buffer)
 147       (save-restriction
 148         (narrow-to-region start end)
 149         (goto-char start)
 150         (while (re-search-forward std11-field-head-regexp nil t)
 151           (setq f-b (match-beginning 0)
 152                 p (match-end 0)
 153                 field-name (buffer-substring f-b p)
 154                 len (string-width field-name)
 155                 f-e (std11-field-end))
 156           (when (mime-visible-field-p field-name
 157                                       visible-fields invisible-fields)
 158             (setq field (intern
 159                          (capitalize (buffer-substring f-b (1- p))))
 160                   field-body (buffer-substring p f-e)
 161                   field-decoder (inline (mime-find-field-decoder-internal
 162                                          field mode-obj)))
 163             (with-current-buffer the-buf
 164               (insert field-name)
 165               (insert (if field-decoder
 166                           (funcall field-decoder field-body len)
 167                         ;; Don't decode
 168                         field-body))
 169               (insert "\n")
 170               )))))))
 171
 172
 173 ;;; @ end
 174 ;;;
 175
 176 (provide 'mmgeneric)
 177
 178 ;;; mmgeneric.el ends here