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