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