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