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629 lines
20 KiB
EmacsLisp
629 lines
20 KiB
EmacsLisp
;;; nndoc.el --- single file access for Gnus
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;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU 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., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(require 'nnheader)
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(require 'message)
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(require 'nnmail)
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(require 'nnoo)
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(eval-when-compile (require 'cl))
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(nnoo-declare nndoc)
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(defvoo nndoc-article-type 'guess
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"*Type of the file.
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One of `mbox', `babyl', `digest', `news', `rnews', `mmdf', `forward',
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`rfc934', `rfc822-forward', `mime-digest', `standard-digest',
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`slack-digest', `clari-briefs' or `guess'.")
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(defvoo nndoc-post-type 'mail
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"*Whether the nndoc group is `mail' or `post'.")
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(defvar nndoc-type-alist
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`((mmdf
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(article-begin . "^\^A\^A\^A\^A\n")
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(body-end . "^\^A\^A\^A\^A\n"))
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(news
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(article-begin . "^Path:"))
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(rnews
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(article-begin . "^#! *rnews +\\([0-9]+\\) *\n")
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(body-end-function . nndoc-rnews-body-end))
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(mbox
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(article-begin-function . nndoc-mbox-article-begin)
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(body-end-function . nndoc-mbox-body-end))
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(babyl
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(article-begin . "\^_\^L *\n")
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(body-end . "\^_")
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(body-begin-function . nndoc-babyl-body-begin)
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(head-begin-function . nndoc-babyl-head-begin))
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(forward
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(article-begin . "^-+ Start of forwarded message -+\n+")
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(body-end . "^-+ End of forwarded message -+$")
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(prepare-body-function . nndoc-unquote-dashes))
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(rfc934
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(article-begin . "^--.*\n+")
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(body-end . "^--.*$")
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(prepare-body-function . nndoc-unquote-dashes))
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(clari-briefs
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(article-begin . "^ \\*")
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(body-end . "^\t------*[ \t]^*\n^ \\*")
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(body-begin . "^\t")
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(head-end . "^\t")
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(generate-head-function . nndoc-generate-clari-briefs-head)
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(article-transform-function . nndoc-transform-clari-briefs))
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(mime-digest
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(article-begin . "")
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(head-end . "^ ?$")
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(body-end . "")
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(file-end . "")
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(subtype digest guess))
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(standard-digest
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(first-article . ,(concat "^" (make-string 70 ?-) "\n\n+"))
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(article-begin . ,(concat "^\n" (make-string 30 ?-) "\n\n+"))
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(prepare-body-function . nndoc-unquote-dashes)
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(body-end-function . nndoc-digest-body-end)
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(head-end . "^ ?$")
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(body-begin . "^ ?\n")
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(file-end . "^End of .*digest.*[0-9].*\n\\*\\*\\|^End of.*Digest *$")
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(subtype digest guess))
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(slack-digest
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(article-begin . "^------------------------------*[\n \t]+")
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(head-end . "^ ?$")
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(body-end-function . nndoc-digest-body-end)
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(body-begin . "^ ?$")
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(file-end . "^End of")
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(prepare-body-function . nndoc-unquote-dashes)
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(subtype digest guess))
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(lanl-gov-announce
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(article-begin . "^\\\\\\\\\n")
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(head-begin . "^Paper.*:")
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(head-end . "\\(^\\\\\\\\.*\n\\|-----------------\\)")
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(body-begin . "")
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(body-end . "-------------------------------------------------")
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(file-end . "^Title: Recent Seminal")
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(generate-head-function . nndoc-generate-lanl-gov-head)
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(article-transform-function . nndoc-transform-lanl-gov-announce)
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(subtype preprints guess))
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(rfc822-forward
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(article-begin . "^\n")
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(body-end-function . nndoc-rfc822-forward-body-end-function))
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(guess
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(guess . t)
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(subtype nil))
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(digest
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(guess . t)
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(subtype nil))
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(preprints
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(guess . t)
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(subtype nil))))
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(defvoo nndoc-file-begin nil)
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(defvoo nndoc-first-article nil)
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(defvoo nndoc-article-end nil)
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(defvoo nndoc-article-begin nil)
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(defvoo nndoc-head-begin nil)
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(defvoo nndoc-head-end nil)
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(defvoo nndoc-file-end nil)
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(defvoo nndoc-body-begin nil)
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(defvoo nndoc-body-end-function nil)
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(defvoo nndoc-body-begin-function nil)
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(defvoo nndoc-head-begin-function nil)
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(defvoo nndoc-body-end nil)
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(defvoo nndoc-dissection-alist nil)
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(defvoo nndoc-prepare-body-function nil)
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(defvoo nndoc-generate-head-function nil)
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(defvoo nndoc-article-transform-function nil)
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(defvoo nndoc-article-begin-function nil)
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(defvoo nndoc-status-string "")
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(defvoo nndoc-group-alist nil)
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(defvoo nndoc-current-buffer nil
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"Current nndoc news buffer.")
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(defvoo nndoc-address nil)
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(defconst nndoc-version "nndoc 1.0"
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"nndoc version.")
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;;; Interface functions
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(nnoo-define-basics nndoc)
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(deffoo nndoc-retrieve-headers (articles &optional newsgroup server fetch-old)
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(when (nndoc-possibly-change-buffer newsgroup server)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(let (article entry)
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(if (stringp (car articles))
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'headers
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(while articles
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(when (setq entry (cdr (assq (setq article (pop articles))
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nndoc-dissection-alist)))
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(insert (format "221 %d Article retrieved.\n" article))
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(if nndoc-generate-head-function
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(funcall nndoc-generate-head-function article)
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(insert-buffer-substring
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nndoc-current-buffer (car entry) (nth 1 entry)))
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(goto-char (point-max))
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(unless (= (char-after (1- (point))) ?\n)
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(insert "\n"))
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(insert (format "Lines: %d\n" (nth 4 entry)))
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(insert ".\n")))
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(nnheader-fold-continuation-lines)
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'headers)))))
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(deffoo nndoc-request-article (article &optional newsgroup server buffer)
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(nndoc-possibly-change-buffer newsgroup server)
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(save-excursion
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(let ((buffer (or buffer nntp-server-buffer))
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(entry (cdr (assq article nndoc-dissection-alist)))
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beg)
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(set-buffer buffer)
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(erase-buffer)
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(when entry
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(if (stringp article)
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nil
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(insert-buffer-substring
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nndoc-current-buffer (car entry) (nth 1 entry))
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(insert "\n")
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(setq beg (point))
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(insert-buffer-substring
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nndoc-current-buffer (nth 2 entry) (nth 3 entry))
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(goto-char beg)
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(when nndoc-prepare-body-function
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(funcall nndoc-prepare-body-function))
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(when nndoc-article-transform-function
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(funcall nndoc-article-transform-function article))
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t)))))
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(deffoo nndoc-request-group (group &optional server dont-check)
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"Select news GROUP."
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(let (number)
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(cond
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((not (nndoc-possibly-change-buffer group server))
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(nnheader-report 'nndoc "No such file or buffer: %s"
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nndoc-address))
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(dont-check
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(nnheader-report 'nndoc "Selected group %s" group)
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t)
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((zerop (setq number (length nndoc-dissection-alist)))
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(nndoc-close-group group)
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(nnheader-report 'nndoc "No articles in group %s" group))
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(t
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(nnheader-insert "211 %d %d %d %s\n" number 1 number group)))))
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(deffoo nndoc-request-type (group &optional article)
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(cond ((not article) 'unknown)
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(nndoc-post-type nndoc-post-type)
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(t 'unknown)))
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(deffoo nndoc-close-group (group &optional server)
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(nndoc-possibly-change-buffer group server)
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(and nndoc-current-buffer
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(buffer-name nndoc-current-buffer)
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(kill-buffer nndoc-current-buffer))
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(setq nndoc-group-alist (delq (assoc group nndoc-group-alist)
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nndoc-group-alist))
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(setq nndoc-current-buffer nil)
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(nnoo-close-server 'nndoc server)
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(setq nndoc-dissection-alist nil)
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t)
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(deffoo nndoc-request-list (&optional server)
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nil)
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(deffoo nndoc-request-newgroups (date &optional server)
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nil)
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(deffoo nndoc-request-list-newsgroups (&optional server)
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nil)
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;;; Internal functions.
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(defun nndoc-possibly-change-buffer (group source)
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(let (buf)
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(cond
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;; The current buffer is this group's buffer.
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((and nndoc-current-buffer
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(buffer-name nndoc-current-buffer)
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(eq nndoc-current-buffer
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(setq buf (cdr (assoc group nndoc-group-alist))))))
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;; We change buffers by taking an old from the group alist.
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;; `source' is either a string (a file name) or a buffer object.
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(buf
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(setq nndoc-current-buffer buf))
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;; It's a totally new group.
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((or (and (bufferp nndoc-address)
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(buffer-name nndoc-address))
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(and (stringp nndoc-address)
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(file-exists-p nndoc-address)
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(not (file-directory-p nndoc-address))))
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(push (cons group (setq nndoc-current-buffer
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(get-buffer-create
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(concat " *nndoc " group "*"))))
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nndoc-group-alist)
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(setq nndoc-dissection-alist nil)
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(save-excursion
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(set-buffer nndoc-current-buffer)
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(buffer-disable-undo (current-buffer))
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(erase-buffer)
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(if (stringp nndoc-address)
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(nnheader-insert-file-contents nndoc-address)
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(insert-buffer-substring nndoc-address)))))
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;; Initialize the nndoc structures according to this new document.
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(when (and nndoc-current-buffer
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(not nndoc-dissection-alist))
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(save-excursion
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(set-buffer nndoc-current-buffer)
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(nndoc-set-delims)
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(nndoc-dissect-buffer)))
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(unless nndoc-current-buffer
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(nndoc-close-server))
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;; Return whether we managed to select a file.
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nndoc-current-buffer))
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;;;
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;;; Deciding what document type we have
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;;;
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(defun nndoc-set-delims ()
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"Set the nndoc delimiter variables according to the type of the document."
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(let ((vars '(nndoc-file-begin
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nndoc-first-article
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nndoc-article-end nndoc-head-begin nndoc-head-end
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nndoc-file-end nndoc-article-begin
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nndoc-body-begin nndoc-body-end-function nndoc-body-end
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nndoc-prepare-body-function nndoc-article-transform-function
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nndoc-generate-head-function nndoc-body-begin-function
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nndoc-head-begin-function)))
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(while vars
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(set (pop vars) nil)))
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(let (defs)
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;; Guess away until we find the real file type.
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(while (assq 'guess (setq defs (cdr (assq nndoc-article-type
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nndoc-type-alist))))
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(setq nndoc-article-type (nndoc-guess-type nndoc-article-type)))
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;; Set the nndoc variables.
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(while defs
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(set (intern (format "nndoc-%s" (caar defs)))
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(cdr (pop defs))))))
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(defun nndoc-guess-type (subtype)
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(let ((alist nndoc-type-alist)
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results result entry)
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(while (and (not result)
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(setq entry (pop alist)))
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(when (memq subtype (or (cdr (assq 'subtype entry)) '(guess)))
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(goto-char (point-min))
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(when (numberp (setq result (funcall (intern
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(format "nndoc-%s-type-p"
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(car entry))))))
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(push (cons result entry) results)
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(setq result nil))))
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(unless (or result results)
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(error "Document is not of any recognized type"))
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(if result
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(car entry)
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(cadar (sort results (lambda (r1 r2) (< (car r1) (car r2))))))))
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;;;
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;;; Built-in type predicates and functions
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;;;
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(defun nndoc-mbox-type-p ()
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(when (looking-at message-unix-mail-delimiter)
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t))
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(defun nndoc-mbox-article-begin ()
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(when (re-search-forward (concat "^" message-unix-mail-delimiter) nil t)
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(goto-char (match-beginning 0))))
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(defun nndoc-mbox-body-end ()
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(let ((beg (point))
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len end)
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(when
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(save-excursion
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(and (re-search-backward
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(concat "^" message-unix-mail-delimiter) nil t)
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(setq end (point))
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(search-forward "\n\n" beg t)
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(re-search-backward
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"^Content-Length:[ \t]*\\([0-9]+\\) *$" end t)
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(setq len (string-to-int (match-string 1)))
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(search-forward "\n\n" beg t)
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(unless (= (setq len (+ (point) len)) (point-max))
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(and (< len (point-max))
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(goto-char len)
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(looking-at message-unix-mail-delimiter)))))
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(goto-char len))))
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(defun nndoc-mmdf-type-p ()
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(when (looking-at "\^A\^A\^A\^A$")
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t))
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(defun nndoc-news-type-p ()
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(when (looking-at "^Path:.*\n")
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t))
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(defun nndoc-rnews-type-p ()
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(when (looking-at "#! *rnews")
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t))
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(defun nndoc-rnews-body-end ()
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(and (re-search-backward nndoc-article-begin nil t)
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(forward-line 1)
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(goto-char (+ (point) (string-to-int (match-string 1))))))
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(defun nndoc-babyl-type-p ()
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(when (re-search-forward "\^_\^L *\n" nil t)
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t))
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(defun nndoc-babyl-body-begin ()
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(re-search-forward "^\n" nil t)
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(when (looking-at "\*\*\* EOOH \*\*\*")
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(let ((next (or (save-excursion
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(re-search-forward nndoc-article-begin nil t))
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(point-max))))
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(unless (re-search-forward "^\n" next t)
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(goto-char next)
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(forward-line -1)
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(insert "\n")
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(forward-line -1)))))
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(defun nndoc-babyl-head-begin ()
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(when (re-search-forward "^[0-9].*\n" nil t)
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(when (looking-at "\*\*\* EOOH \*\*\*")
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(forward-line 1))
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t))
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(defun nndoc-forward-type-p ()
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(when (and (re-search-forward "^-+ Start of forwarded message -+\n+" nil t)
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(not (re-search-forward "^Subject:.*digest" nil t))
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(not (re-search-backward "^From:" nil t 2))
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(not (re-search-forward "^From:" nil t 2)))
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t))
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(defun nndoc-rfc934-type-p ()
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(when (and (re-search-forward "^-+ Start of forwarded.*\n+" nil t)
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(not (re-search-forward "^Subject:.*digest" nil t))
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(not (re-search-backward "^From:" nil t 2))
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(not (re-search-forward "^From:" nil t 2)))
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t))
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(defun nndoc-rfc822-forward-type-p ()
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(save-restriction
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(message-narrow-to-head)
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(when (re-search-forward "^Content-Type: *message/rfc822" nil t)
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t)))
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(defun nndoc-rfc822-forward-body-end-function ()
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(goto-char (point-max)))
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(defun nndoc-clari-briefs-type-p ()
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(when (let ((case-fold-search nil))
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(re-search-forward "^\t[^a-z]+ ([^a-z]+) --" nil t))
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t))
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(defun nndoc-transform-clari-briefs (article)
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(goto-char (point-min))
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(when (looking-at " *\\*\\(.*\\)\n")
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(replace-match "" t t))
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(nndoc-generate-clari-briefs-head article))
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(defun nndoc-generate-clari-briefs-head (article)
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(let ((entry (cdr (assq article nndoc-dissection-alist)))
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subject from)
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(save-excursion
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(set-buffer nndoc-current-buffer)
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(save-restriction
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(narrow-to-region (car entry) (nth 3 entry))
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(goto-char (point-min))
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(when (looking-at " *\\*\\(.*\\)$")
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(setq subject (match-string 1))
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(when (string-match "[ \t]+$" subject)
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(setq subject (substring subject 0 (match-beginning 0)))))
|
||
(when
|
||
(let ((case-fold-search nil))
|
||
(re-search-forward
|
||
"^\t\\([^a-z]+\\(,[^(]+\\)? ([^a-z]+)\\) --" nil t))
|
||
(setq from (match-string 1)))))
|
||
(insert "From: " "clari@clari.net (" (or from "unknown") ")"
|
||
"\nSubject: " (or subject "(no subject)") "\n")))
|
||
|
||
(defun nndoc-mime-digest-type-p ()
|
||
(let ((case-fold-search t)
|
||
boundary-id b-delimiter entry)
|
||
(when (and
|
||
(re-search-forward
|
||
(concat "^Content-Type: *multipart/digest;[ \t\n]*[ \t]"
|
||
"boundary=\"\\([^\"\n]*[^\" \t\n]\\)\"")
|
||
nil t)
|
||
(match-beginning 1))
|
||
(setq boundary-id (match-string 1)
|
||
b-delimiter (concat "\n--" boundary-id "[\n \t]+"))
|
||
(setq entry (assq 'mime-digest nndoc-type-alist))
|
||
(setcdr entry
|
||
(list
|
||
(cons 'head-end "^ ?$")
|
||
(cons 'body-begin "^ ?\n")
|
||
(cons 'article-begin b-delimiter)
|
||
(cons 'body-end-function 'nndoc-digest-body-end)
|
||
(cons 'file-end (concat "\n--" boundary-id "--[ \t]*$"))))
|
||
t)))
|
||
|
||
(defun nndoc-standard-digest-type-p ()
|
||
(when (and (re-search-forward (concat "^" (make-string 70 ?-) "\n\n") nil t)
|
||
(re-search-forward
|
||
(concat "\n\n" (make-string 30 ?-) "\n\n") nil t))
|
||
t))
|
||
|
||
(defun nndoc-digest-body-end ()
|
||
(and (re-search-forward nndoc-article-begin nil t)
|
||
(goto-char (match-beginning 0))))
|
||
|
||
(defun nndoc-slack-digest-type-p ()
|
||
0)
|
||
|
||
(defun nndoc-lanl-gov-announce-type-p ()
|
||
(when (let ((case-fold-search nil))
|
||
(re-search-forward "^\\\\\\\\\nPaper: [a-z-]+/[0-9]+" nil t))
|
||
t))
|
||
|
||
(defun nndoc-transform-lanl-gov-announce (article)
|
||
(goto-char (point-max))
|
||
(when (re-search-backward "^\\\\\\\\ +(\\([^ ]*\\) , *\\([^ ]*\\))" nil t)
|
||
(replace-match "\n\nGet it at \\1 (\\2)" t nil))
|
||
;; (when (re-search-backward "^\\\\\\\\$" nil t)
|
||
;; (replace-match "" t t))
|
||
)
|
||
|
||
(defun nndoc-generate-lanl-gov-head (article)
|
||
(let ((entry (cdr (assq article nndoc-dissection-alist)))
|
||
(e-mail "no address given")
|
||
subject from)
|
||
(save-excursion
|
||
(set-buffer nndoc-current-buffer)
|
||
(save-restriction
|
||
(narrow-to-region (car entry) (nth 1 entry))
|
||
(goto-char (point-min))
|
||
(when (looking-at "^Paper.*: \\([a-z-]+/[0-9]+\\)")
|
||
(setq subject (concat " (" (match-string 1) ")"))
|
||
(when (re-search-forward "^From: \\([^ ]+\\)" nil t)
|
||
(setq e-mail (match-string 1)))
|
||
(when (re-search-forward "^Title: \\([^\f]*\\)\nAuthors?: \\(.*\\)"
|
||
nil t)
|
||
(setq subject (concat (match-string 1) subject))
|
||
(setq from (concat (match-string 2) " <" e-mail ">"))))
|
||
))
|
||
(while (and from (string-match "(\[^)\]*)" from))
|
||
(setq from (replace-match "" t t from)))
|
||
(insert "From: " (or from "unknown")
|
||
"\nSubject: " (or subject "(no subject)") "\n")))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Functions for dissecting the documents
|
||
;;;
|
||
|
||
(defun nndoc-search (regexp)
|
||
(prog1
|
||
(re-search-forward regexp nil t)
|
||
(beginning-of-line)))
|
||
|
||
(defun nndoc-dissect-buffer ()
|
||
"Go through the document and partition it into heads/bodies/articles."
|
||
(let ((i 0)
|
||
(first t)
|
||
head-begin head-end body-begin body-end)
|
||
(setq nndoc-dissection-alist nil)
|
||
(save-excursion
|
||
(set-buffer nndoc-current-buffer)
|
||
(goto-char (point-min))
|
||
;; Find the beginning of the file.
|
||
(when nndoc-file-begin
|
||
(nndoc-search nndoc-file-begin))
|
||
;; Go through the file.
|
||
(while (if (and first nndoc-first-article)
|
||
(nndoc-search nndoc-first-article)
|
||
(nndoc-article-begin))
|
||
(setq first nil)
|
||
(cond (nndoc-head-begin-function
|
||
(funcall nndoc-head-begin-function))
|
||
(nndoc-head-begin
|
||
(nndoc-search nndoc-head-begin)))
|
||
(if (or (>= (point) (point-max))
|
||
(and nndoc-file-end
|
||
(looking-at nndoc-file-end)))
|
||
(goto-char (point-max))
|
||
(setq head-begin (point))
|
||
(nndoc-search (or nndoc-head-end "^$"))
|
||
(setq head-end (point))
|
||
(if nndoc-body-begin-function
|
||
(funcall nndoc-body-begin-function)
|
||
(nndoc-search (or nndoc-body-begin "^\n")))
|
||
(setq body-begin (point))
|
||
(or (and nndoc-body-end-function
|
||
(funcall nndoc-body-end-function))
|
||
(and nndoc-body-end
|
||
(nndoc-search nndoc-body-end))
|
||
(nndoc-article-begin)
|
||
(progn
|
||
(goto-char (point-max))
|
||
(when nndoc-file-end
|
||
(and (re-search-backward nndoc-file-end nil t)
|
||
(beginning-of-line)))))
|
||
(setq body-end (point))
|
||
(push (list (incf i) head-begin head-end body-begin body-end
|
||
(count-lines body-begin body-end))
|
||
nndoc-dissection-alist))))))
|
||
|
||
(defun nndoc-article-begin ()
|
||
(if nndoc-article-begin-function
|
||
(funcall nndoc-article-begin-function)
|
||
(ignore-errors
|
||
(nndoc-search nndoc-article-begin))))
|
||
|
||
(defun nndoc-unquote-dashes ()
|
||
"Unquote quoted non-separators in digests."
|
||
(while (re-search-forward "^- -"nil t)
|
||
(replace-match "-" t t)))
|
||
|
||
;;;###autoload
|
||
(defun nndoc-add-type (definition &optional position)
|
||
"Add document DEFINITION to the list of nndoc document definitions.
|
||
If POSITION is nil or `last', the definition will be added
|
||
as the last checked definition, if t or `first', add as the
|
||
first definition, and if any other symbol, add after that
|
||
symbol in the alist."
|
||
;; First remove any old instances.
|
||
(setq nndoc-type-alist
|
||
(delq (assq (car definition) nndoc-type-alist)
|
||
nndoc-type-alist))
|
||
;; Then enter the new definition in the proper place.
|
||
(cond
|
||
((or (null position) (eq position 'last))
|
||
(setq nndoc-type-alist (nconc nndoc-type-alist (list definition))))
|
||
((or (eq position t) (eq position 'first))
|
||
(push definition nndoc-type-alist))
|
||
(t
|
||
(let ((list (memq (assq position nndoc-type-alist)
|
||
nndoc-type-alist)))
|
||
(unless list
|
||
(error "No such position: %s" position))
|
||
(setcdr list (cons definition (cdr list)))))))
|
||
|
||
(provide 'nndoc)
|
||
|
||
;;; nndoc.el ends here
|