360 lines
12 KiB
EmacsLisp
360 lines
12 KiB
EmacsLisp
;;; mmbuffer.el --- MIME entity module for binary buffer
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;; Copyright (C) 1998,1999,2000 Free Software Foundation, Inc.
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;; Author: MORIOKA Tomohiko <tomo@m17n.org>
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;; Keywords: MIME, multimedia, mail, news
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;; This file is part of FLIM (Faithful Library about Internet Message).
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Code:
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(require 'mmgeneric)
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(require 'mime)
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(eval-and-compile
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(luna-define-class mime-buffer-entity (mime-entity)
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(buffer
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header-start
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header-end
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body-start
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body-end))
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(luna-define-internal-accessors 'mime-buffer-entity)
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)
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(luna-define-method initialize-instance :after ((entity mime-buffer-entity)
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&rest init-args)
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(or (mime-buffer-entity-buffer-internal entity)
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(mime-buffer-entity-set-buffer-internal
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entity (get-buffer (mime-entity-location-internal entity))))
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(let ((header-start
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(or (mime-buffer-entity-header-start-internal entity)
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(mime-buffer-entity-set-header-start-internal
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entity (point-min))))
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(header-end (mime-buffer-entity-header-end-internal entity))
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(body-start (mime-buffer-entity-body-start-internal entity))
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(body-end
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(or (mime-buffer-entity-body-end-internal entity)
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(mime-buffer-entity-set-body-end-internal entity (point-max)))))
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(goto-char header-start)
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(unless (and header-end body-start)
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(if (re-search-forward "^$" body-end t)
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(setq header-end (match-end 0)
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body-start (if (= header-end body-end)
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body-end
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(1+ header-end)))
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(setq header-end (point-min)
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body-start (point-min)))
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(mime-buffer-entity-set-header-end-internal entity header-end)
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(mime-buffer-entity-set-body-start-internal entity body-start)
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)
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(or (mime-entity-content-type-internal entity)
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(save-restriction
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(narrow-to-region header-start header-end)
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(mime-entity-set-content-type-internal
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entity
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(let ((str (std11-fetch-field "Content-Type")))
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(if str
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(mime-parse-Content-Type str)
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)))
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))
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))
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entity)
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(luna-define-method mime-entity-name ((entity mime-buffer-entity))
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(buffer-name (mime-buffer-entity-buffer-internal entity))
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)
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;;; @ entity
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;;;
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(luna-define-method mime-insert-entity ((entity mime-buffer-entity))
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(insert-buffer-substring (mime-buffer-entity-buffer-internal entity)
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(mime-buffer-entity-header-start-internal entity)
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(mime-buffer-entity-body-end-internal entity))
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)
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(luna-define-method mime-write-entity ((entity mime-buffer-entity) filename)
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(let ((coding-system-for-write 'raw-text-dos))
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(write-region (mime-buffer-entity-header-start-internal entity)
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(mime-buffer-entity-body-end-internal entity)
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filename))))
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;;; @ entity header
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;;;
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;;; @ entity body
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;;;
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(luna-define-method mime-entity-body ((entity mime-buffer-entity))
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(buffer-substring (mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity))))
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(luna-define-method mime-insert-entity-body ((entity mime-buffer-entity))
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(insert-buffer-substring (mime-buffer-entity-buffer-internal entity)
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(mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity))
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)
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(luna-define-method mime-write-entity-body ((entity mime-buffer-entity)
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filename)
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(binary-write-decoded-region
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(mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity)
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filename)))
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;;; @ entity content
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;;;
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(luna-define-method mime-entity-content ((entity mime-buffer-entity))
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(mime-decode-string
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(buffer-substring (mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity))
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(mime-entity-encoding entity))))
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(luna-define-method mime-insert-entity-content ((entity mime-buffer-entity))
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(insert (with-current-buffer (mime-buffer-entity-buffer-internal entity)
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(mime-decode-string
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(buffer-substring (mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity))
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(mime-entity-encoding entity)))))
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(luna-define-method mime-write-entity-content ((entity mime-buffer-entity)
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filename)
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(mime-write-decoded-region (mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity)
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filename
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(or (mime-entity-encoding entity) "7bit"))
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))
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;;; @ header field
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;;;
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(luna-define-method mime-entity-fetch-field :around
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((entity mime-buffer-entity) field-name)
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(or (luna-call-next-method)
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(save-excursion
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(set-buffer (mime-buffer-entity-buffer-internal entity))
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(save-restriction
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(narrow-to-region (mime-buffer-entity-header-start-internal entity)
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(mime-buffer-entity-header-end-internal entity))
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(let ((ret (std11-fetch-field field-name)))
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(when ret
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(or (symbolp field-name)
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(setq field-name (intern (capitalize field-name))))
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(mime-entity-set-original-header-internal
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entity
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(put-alist field-name ret
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(mime-entity-original-header-internal entity)))
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ret))))))
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(luna-define-method mime-insert-header ((entity mime-buffer-entity)
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&optional invisible-fields
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visible-fields)
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(mime-insert-header-from-buffer
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(mime-buffer-entity-buffer-internal entity)
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(mime-buffer-entity-header-start-internal entity)
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(mime-buffer-entity-header-end-internal entity)
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invisible-fields visible-fields)
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)
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;;; @ header buffer
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;;;
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;; (luna-define-method mime-entity-header-buffer ((entity mime-buffer-entity))
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;; (mime-buffer-entity-buffer-internal entity)
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;; )
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;; (luna-define-method mime-goto-header-start-point ((entity mime-buffer-entity))
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;; (set-buffer (mime-buffer-entity-buffer-internal entity))
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;; (goto-char (mime-buffer-entity-header-start-internal entity))
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;; )
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;; (luna-define-method mime-entity-header-start-point ((entity
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;; mime-buffer-entity))
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;; (mime-buffer-entity-header-start-internal entity)
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;; )
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;; (luna-define-method mime-entity-header-end-point ((entity
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;; mime-buffer-entity))
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;; (mime-buffer-entity-header-end-internal entity)
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;; )
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;;; @ body buffer
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;;;
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;; (luna-define-method mime-entity-body-buffer ((entity mime-buffer-entity))
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;; (mime-buffer-entity-buffer-internal entity)
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;; )
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;; (luna-define-method mime-goto-body-start-point ((entity mime-buffer-entity))
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;; (set-buffer (mime-buffer-entity-buffer-internal entity))
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;; (goto-char (mime-buffer-entity-body-start-internal entity))
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;; )
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;; (luna-define-method mime-goto-body-end-point ((entity mime-buffer-entity))
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;; (set-buffer (mime-buffer-entity-buffer-internal entity))
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;; (goto-char (mime-buffer-entity-body-end-internal entity))
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;; )
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;; (luna-define-method mime-entity-body-start-point ((entity mime-buffer-entity))
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;; (mime-buffer-entity-body-start-internal entity)
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;; )
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;; (luna-define-method mime-entity-body-end-point ((entity mime-buffer-entity))
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;; (mime-buffer-entity-body-end-internal entity)
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;; )
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;;; @ buffer (obsolete)
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;;;
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;; (luna-define-method mime-entity-buffer ((entity mime-buffer-entity))
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;; (mime-buffer-entity-buffer-internal entity)
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;; )
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;; (luna-define-method mime-entity-point-min ((entity mime-buffer-entity))
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;; (mime-buffer-entity-header-start-internal entity)
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;; )
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;; (luna-define-method mime-entity-point-max ((entity mime-buffer-entity))
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;; (mime-buffer-entity-body-end-internal entity)
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;; )
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;;; @ children
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;;;
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(defun mmbuffer-parse-multipart (entity &optional representation-type)
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(with-current-buffer (mime-buffer-entity-buffer-internal entity)
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(or representation-type
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(setq representation-type
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(mime-entity-representation-type-internal entity)))
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(let* ((content-type (mime-entity-content-type-internal entity))
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(dash-boundary
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(concat "--"
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(mime-content-type-parameter content-type "boundary")))
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(delimiter (concat "\n" (regexp-quote dash-boundary)))
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(close-delimiter (concat delimiter "--[ \t]*$"))
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(rsep (concat delimiter "[ \t]*\n"))
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(dc-ctl
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(if (eq (mime-content-type-subtype content-type) 'digest)
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(make-mime-content-type 'message 'rfc822)
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(make-mime-content-type 'text 'plain)
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))
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(body-start (mime-buffer-entity-body-start-internal entity))
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(body-end (mime-buffer-entity-body-end-internal entity)))
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(save-restriction
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(goto-char body-end)
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(narrow-to-region body-start
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(if (re-search-backward close-delimiter nil t)
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(match-beginning 0)
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body-end))
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(goto-char body-start)
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(if (re-search-forward
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(concat "^" (regexp-quote dash-boundary) "[ \t]*\n")
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nil t)
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(let ((cb (match-end 0))
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ce ncb ret children
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(node-id (mime-entity-node-id-internal entity))
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(i 0))
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(while (re-search-forward rsep nil t)
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(setq ce (match-beginning 0))
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(setq ncb (match-end 0))
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(save-restriction
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(narrow-to-region cb ce)
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(setq ret (mime-parse-message representation-type dc-ctl
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entity (cons i node-id)))
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)
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(setq children (cons ret children))
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(goto-char (setq cb ncb))
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(setq i (1+ i))
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)
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(setq ce (point-max))
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(save-restriction
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(narrow-to-region cb ce)
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(setq ret (mime-parse-message representation-type dc-ctl
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entity (cons i node-id)))
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)
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(setq children (cons ret children))
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(mime-entity-set-children-internal entity (nreverse children))
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)
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(mime-entity-set-content-type-internal
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entity (make-mime-content-type 'message 'x-broken))
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nil)
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))))
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(defun mmbuffer-parse-encapsulated (entity &optional external
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representation-type)
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(mime-entity-set-children-internal
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entity
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(with-current-buffer (mime-buffer-entity-buffer-internal entity)
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(save-restriction
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(narrow-to-region (mime-buffer-entity-body-start-internal entity)
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(mime-buffer-entity-body-end-internal entity))
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(list (mime-parse-message
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(if external
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(progn
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(require 'mmexternal)
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'mime-external-entity)
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(or representation-type
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(mime-entity-representation-type-internal entity)))
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nil
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entity (cons 0 (mime-entity-node-id-internal entity))))))))
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(luna-define-method mime-entity-children ((entity mime-buffer-entity))
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(let* ((content-type (mime-entity-content-type entity))
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(primary-type (mime-content-type-primary-type content-type))
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sub-type)
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(cond ((eq primary-type 'multipart)
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(mmbuffer-parse-multipart entity))
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((eq primary-type 'message)
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(setq sub-type (mime-content-type-subtype content-type))
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(cond ((eq sub-type 'external-body)
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(mmbuffer-parse-encapsulated entity 'external))
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((memq sub-type '(rfc822 news))
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(mmbuffer-parse-encapsulated entity)))))))
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;;; @ end
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;;;
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(provide 'mmbuffer)
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;;; mmbuffer.el ends here
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