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., 51 Franklin Street, Fifth Floor,
  23 ;; Boston, MA 02110-1301, 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 (luna-define-class mime-entity ()
  45                    (location
  46                     content-type children parent
  47                     node-id
  48                     content-disposition encoding
  49                     ;; for other fields
  50                     original-header parsed-header))
  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-internal-accessors 'mime-entity)
  56
  57 (luna-define-method mime-entity-fetch-field ((entity mime-entity)
  58                                              field-name)
  59   (or (symbolp field-name)
  60       (setq field-name (intern (capitalize field-name))))
  61   (cdr (assq field-name
  62              (mime-entity-original-header-internal entity))))
  63
  64 ;; unlimited patch by simm-emacs@fan.gr.jp
  65 ;;   Tue, 01 Feb 2000 13:32:14 +0900
  66 (luna-define-method mime-insert-text-content ((entity mime-entity))
  67   (insert
  68    (decode-mime-charset-string-unlimited
  69     (mime-entity-content entity)
  70     (or (mime-content-type-parameter
  71          (mime-entity-content-type entity)
  72          "charset")
  73         default-mime-charset-unlimited
  74         default-mime-charset)
  75     'CRLF)))
  76
  77
  78 ;;; @ for mm-backend
  79 ;;;
  80
  81 (defmacro mm-expand-class-name (type)
  82   `(intern (format "mime-%s-entity" ,type)))
  83
  84 (defmacro mm-define-backend (type &optional parents)
  85   `(luna-define-class ,(mm-expand-class-name type)
  86                       ,(nconc (mapcar (lambda (parent)
  87                                         (mm-expand-class-name parent)
  88                                         )
  89                                       parents)
  90                               '(mime-entity))))
  91
  92 (defmacro mm-define-method (name args &rest body)
  93   (or (eq name 'initialize-instance)
  94       (setq name (intern (format "mime-%s" name))))
  95   (let ((spec (car args)))
  96     (setq args
  97           (cons (list (car spec)
  98                       (mm-expand-class-name (nth 1 spec)))
  99                 (cdr args)))
 100     `(luna-define-method ,name ,args ,@body)
 101     ))
 102
 103 (put 'mm-define-method 'lisp-indent-function 'defun)
 104
 105 (def-edebug-spec mm-define-method
 106   (&define name ((arg symbolp)
 107                  [&rest arg]
 108                  [&optional ["&optional" arg &rest arg]]
 109                  &optional ["&rest" arg]
 110                  )
 111            def-body))
 112
 113
 114 ;;; @ header filter
 115 ;;;
 116
 117 ;; [tomo] We should think about specification of better filtering
 118 ;; mechanism.  Please discuss in the emacs-mime mailing lists.
 119
 120 (defun mime-visible-field-p (field-name visible-fields invisible-fields)
 121   (or (catch 'found
 122         (while visible-fields
 123           (let ((regexp (car visible-fields)))
 124             (if (string-match regexp field-name)
 125                 (throw 'found t)
 126               ))
 127           (setq visible-fields (cdr visible-fields))
 128           ))
 129       (catch 'found
 130         (while invisible-fields
 131           (let ((regexp (car invisible-fields)))
 132             (if (string-match regexp field-name)
 133                 (throw 'found nil)
 134               ))
 135           (setq invisible-fields (cdr invisible-fields))
 136           )
 137         t)))
 138
 139 (defun mime-insert-header-from-buffer (buffer start end
 140                                               &optional invisible-fields
 141                                               visible-fields)
 142   (let ((the-buf (current-buffer))
 143         (mode-obj (mime-find-field-presentation-method 'wide))
 144         field-decoder
 145         f-b p f-e field-name len field field-body)
 146     (save-excursion
 147       (set-buffer buffer)
 148       (save-restriction
 149         (narrow-to-region start end)
 150         (goto-char start)
 151         (while (re-search-forward std11-field-head-regexp nil t)
 152           (setq f-b (match-beginning 0)
 153                 p (match-end 0)
 154                 field-name (buffer-substring f-b p)
 155                 len (string-width field-name)
 156                 f-e (std11-field-end))
 157           (when (mime-visible-field-p field-name
 158                                       visible-fields invisible-fields)
 159             (setq field (intern
 160                          (capitalize (buffer-substring f-b (1- p))))
 161                   field-body (buffer-substring p f-e)
 162                   field-decoder (inline (mime-find-field-decoder-internal
 163                                          field mode-obj)))
 164             (with-current-buffer the-buf
 165               (insert field-name)
 166               (insert (if field-decoder
 167                           (funcall field-decoder field-body len)
 168                         ;; Don't decode
 169                         field-body))
 170               (insert "\n")
 171               )))))))
 172
 173
 174 ;;; @ end
 175 ;;;
 176
 177 (provide 'mmgeneric)
 178
 179 ;;; mmgeneric.el ends here