-;;; nndoc.el --- single file access for Gnus
;; Copyright (C) 1995,96 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;;; Code:
(require 'nnheader)
-(require 'rmail)
+(require 'message)
(require 'nnmail)
+(require 'nnoo)
(eval-when-compile (require 'cl))
-(defvar nndoc-article-type 'guess
+(nnoo-declare nndoc)
+
+(defvoo nndoc-article-type 'guess
"*Type of the file.
One of `mbox', `babyl', `digest', `news', `rnews', `mmdf', `forward',
`mime-digest', `standard-digest', `slack-digest', `clari-briefs' or
`guess'.")
-(defvar nndoc-post-type 'mail
+(defvoo nndoc-post-type 'mail
"*Whether the nndoc group is `mail' or `post'.")
(defvar nndoc-type-alist
(body-end-function . nndoc-rnews-body-end))
(mbox
(article-begin .
- ,(let ((delim (concat "^" rmail-unix-mail-delimiter)))
+ ,(let ((delim (concat "^" message-unix-mail-delimiter)))
(if (string-match "\n\\'" delim)
(substring delim 0 (match-beginning 0))
delim)))
(article-begin . "\^_\^L *\n")
(body-end . "\^_")
(body-begin-function . nndoc-babyl-body-begin)
- (head-begin . "^[0-9].*\n"))
+ (head-begin-function . nndoc-babyl-head-begin))
(forward
(article-begin . "^-+ Start of forwarded message -+\n+")
- (body-end . "^-+ End of forwarded message -+\n"))
+ (body-end . "^-+ End of forwarded message -+$")
+ (prepare-body-function . nndoc-unquote-dashes))
(clari-briefs
(article-begin . "^ \\*")
(body-end . "^\t------*[ \t]^*\n^ \\*")
(body-begin . "^\t")
(head-end . "^\t")
- (generate-head . nndoc-generate-clari-briefs-head)
- (article-transform . nndoc-transform-clari-briefs))
- (slack-digest
- (article-begin . "^------------------------------*[\n \t]+")
- (head-end . "^ ?$")
- (body-end-function . nndoc-digest-body-end)
- (body-begin . "^ ?$")
- (file-end . "^End of")
- (prepare-body . nndoc-prepare-digest-body))
+ (generate-head-function . nndoc-generate-clari-briefs-head)
+ (article-transform-function . nndoc-transform-clari-briefs))
(mime-digest
(article-begin . "")
(head-end . "^ ?$")
(body-end . "")
- (file-end . ""))
+ (file-end . "")
+ (subtype digest guess))
(standard-digest
(first-article . ,(concat "^" (make-string 70 ?-) "\n\n+"))
(article-begin . ,(concat "\n\n" (make-string 30 ?-) "\n\n+"))
- (prepare-body . nndoc-prepare-digest-body)
+ (prepare-body-function . nndoc-unquote-dashes)
(body-end-function . nndoc-digest-body-end)
- (file-end . "^End of .*digest.*[0-9].*\n\\*\\*\\|^End of.*Digest *$"))
+ (head-end . "^ ?$")
+ (body-begin . "^ ?\n")
+ (file-end . "^End of .*digest.*[0-9].*\n\\*\\*\\|^End of.*Digest *$")
+ (subtype digest guess))
+ (slack-digest
+ (article-begin . "^------------------------------*[\n \t]+")
+ (head-end . "^ ?$")
+ (body-end-function . nndoc-digest-body-end)
+ (body-begin . "^ ?$")
+ (file-end . "^End of")
+ (prepare-body-function . nndoc-unquote-dashes)
+ (subtype digest guess))
+ (lanl-gov-announce
+ (article-begin . "^\\\\\\\\\n")
+ (head-begin . "^Paper.*:")
+ (head-end . "\\(^\\\\\\\\.*\n\\|-----------------\\)")
+ (body-begin . "")
+ (body-end . "-------------------------------------------------")
+ (file-end . "^Title: Recent Seminal")
+ (generate-head-function . nndoc-generate-lanl-gov-head)
+ (article-transform-function . nndoc-transform-lanl-gov-announce)
+ (subtype preprints guess))
(guess
- (guess . nndoc-guess-type))
+ (guess . t)
+ (subtype nil))
(digest
- (guess . nndoc-guess-digest-type))
+ (guess . t)
+ (subtype nil))
+ (preprints
+ (guess . t)
+ (subtype nil))
))
\f
-(defvar nndoc-file-begin nil)
-(defvar nndoc-first-article nil)
-(defvar nndoc-article-end nil)
-(defvar nndoc-article-begin nil)
-(defvar nndoc-head-begin nil)
-(defvar nndoc-head-end nil)
-(defvar nndoc-file-end nil)
-(defvar nndoc-body-begin nil)
-(defvar nndoc-body-end-function nil)
-(defvar nndoc-body-begin-function nil)
-(defvar nndoc-body-end nil)
-(defvar nndoc-dissection-alist nil)
-(defvar nndoc-prepare-body nil)
-(defvar nndoc-generate-head nil)
-(defvar nndoc-article-transform nil)
-
-(defvar nndoc-current-server nil)
-(defvar nndoc-server-alist nil)
-(defvar nndoc-server-variables
- `((nndoc-article-type ,nndoc-article-type)
- (nndoc-article-begin nil)
- (nndoc-article-end nil)
- (nndoc-head-begin nil)
- (nndoc-head-end nil)
- (nndoc-first-article nil)
- (nndoc-current-buffer nil)
- (nndoc-group-alist nil)
- (nndoc-end-of-file nil)
- (nndoc-body-begin nil)
- (nndoc-dissection-alist nil)
- (nndoc-generate-head nil)
- (nndoc-article-transform nil)
- (nndoc-body-end-function nil)
- (nndoc-prepare-body nil)
- (nndoc-body-begin-function nil)
- (nndoc-address nil)))
+(defvoo nndoc-file-begin nil)
+(defvoo nndoc-first-article nil)
+(defvoo nndoc-article-end nil)
+(defvoo nndoc-article-begin nil)
+(defvoo nndoc-head-begin nil)
+(defvoo nndoc-head-end nil)
+(defvoo nndoc-file-end nil)
+(defvoo nndoc-body-begin nil)
+(defvoo nndoc-body-end-function nil)
+(defvoo nndoc-body-begin-function nil)
+(defvoo nndoc-head-begin-function nil)
+(defvoo nndoc-body-end nil)
+(defvoo nndoc-dissection-alist nil)
+(defvoo nndoc-prepare-body-function nil)
+(defvoo nndoc-generate-head-function nil)
+(defvoo nndoc-article-transform-function nil)
+
+(defvoo nndoc-status-string "")
+(defvoo nndoc-group-alist nil)
+(defvoo nndoc-current-buffer nil
+ "Current nndoc news buffer.")
+(defvoo nndoc-address nil)
(defconst nndoc-version "nndoc 1.0"
"nndoc version.")
-(defvar nndoc-current-buffer nil
- "Current nndoc news buffer.")
-
-(defvar nndoc-address nil)
-
\f
-(defvar nndoc-status-string "")
-
-(defvar nndoc-group-alist nil)
-
;;; Interface functions
-(defun nndoc-retrieve-headers (articles &optional newsgroup server fetch-old)
+(nnoo-define-basics nndoc)
+
+(deffoo nndoc-retrieve-headers (articles &optional newsgroup server fetch-old)
(when (nndoc-possibly-change-buffer newsgroup server)
(save-excursion
(set-buffer nntp-server-buffer)
(when (setq entry (cdr (assq (setq article (pop articles))
nndoc-dissection-alist)))
(insert (format "221 %d Article retrieved.\n" article))
- (if nndoc-generate-head
- (funcall nndoc-generate-head article)
+ (if nndoc-generate-head-function
+ (funcall nndoc-generate-head-function article)
(insert-buffer-substring
nndoc-current-buffer (car entry) (nth 1 entry)))
(goto-char (point-max))
(nnheader-fold-continuation-lines)
'headers)))))
-(defun nndoc-open-server (server &optional defs)
- (nnheader-change-server 'nndoc server defs))
-
-(defun nndoc-close-server (&optional server)
- (setq nndoc-current-server nil)
- t)
-
-(defun nndoc-server-opened (&optional server)
- (and (equal server nndoc-current-server)
- nntp-server-buffer
- (buffer-name nntp-server-buffer)))
-
-(defun nndoc-status-message (&optional server)
- nndoc-status-string)
-
-(defun nndoc-request-article (article &optional newsgroup server buffer)
+(deffoo nndoc-request-article (article &optional newsgroup server buffer)
(nndoc-possibly-change-buffer newsgroup server)
(save-excursion
(let ((buffer (or buffer nntp-server-buffer))
(insert-buffer-substring
nndoc-current-buffer (nth 2 entry) (nth 3 entry))
(goto-char beg)
- (when nndoc-prepare-body
- (funcall nndoc-prepare-body))
- (when nndoc-article-transform
- (funcall nndoc-article-transform article))
+ (when nndoc-prepare-body-function
+ (funcall nndoc-prepare-body-function))
+ (when nndoc-article-transform-function
+ (funcall nndoc-article-transform-function article))
t))))
-(defun nndoc-request-group (group &optional server dont-check)
+(deffoo nndoc-request-group (group &optional server dont-check)
"Select news GROUP."
(let (number)
(cond
(t
(nnheader-insert "211 %d %d %d %s\n" number 1 number group)))))
-(defun nndoc-request-type (group &optional article)
+(deffoo nndoc-request-type (group &optional article)
(cond ((not article) 'unknown)
(nndoc-post-type nndoc-post-type)
(t 'unknown)))
-(defun nndoc-close-group (group &optional server)
+(deffoo nndoc-close-group (group &optional server)
(nndoc-possibly-change-buffer group server)
(and nndoc-current-buffer
(buffer-name nndoc-current-buffer)
(setq nndoc-group-alist (delq (assoc group nndoc-group-alist)
nndoc-group-alist))
(setq nndoc-current-buffer nil)
- (setq nndoc-current-server nil)
+ (nnoo-close-server 'nndoc server)
(setq nndoc-dissection-alist nil)
t)
-(defun nndoc-request-list (&optional server)
+(deffoo nndoc-request-list (&optional server)
nil)
-(defun nndoc-request-newgroups (date &optional server)
+(deffoo nndoc-request-newgroups (date &optional server)
nil)
-(defun nndoc-request-list-newsgroups (&optional server)
+(deffoo nndoc-request-list-newsgroups (&optional server)
nil)
-(defalias 'nndoc-request-post 'nnmail-request-post)
-
\f
;;; Internal functions.
;; Return whether we managed to select a file.
nndoc-current-buffer))
-;; MIME (RFC 1341) digest hack by Ulrik Dickow <dickow@nbi.dk>.
-(defun nndoc-guess-digest-type ()
- "Guess what digest type the current document is."
- (let ((case-fold-search t) ; We match a bit too much, keep it simple.
- boundary-id b-delimiter entry)
- (goto-char (point-min))
- (cond
- ;; MIME digest.
- ((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 'body-end
-; (concat "\n--" boundary-id "\\(--\\)?[\n \t]+"))
- (cons 'file-end (concat "\n--" boundary-id "--[ \t]*$"))))
- 'mime-digest)
- ;; Standard digest.
- ((and (re-search-forward (concat "^" (make-string 70 ?-) "\n\n") nil t)
- (re-search-forward
- (concat "\n\n" (make-string 30 ?-) "\n\n") nil t))
- 'standard-digest)
- ;; Stupid digest.
- (t
- 'slack-digest))))
-
-(defun nndoc-guess-type ()
- "Guess what document type is in the current buffer."
- (goto-char (point-min))
- (cond
- ((looking-at rmail-unix-mail-delimiter)
- 'mbox)
- ((looking-at "\^A\^A\^A\^A$")
- 'mmdf)
- ((looking-at "^Path:.*\n")
- 'news)
- ((looking-at "#! *rnews")
- 'rnews)
- ((re-search-forward "\^_\^L *\n" nil t)
- 'babyl)
- ((save-excursion
- (and (re-search-forward "^-+ Start of forwarded message -+\n+" nil t)
- (not (re-search-forward "^Subject:.*digest" nil t))))
- 'forward)
- ((let ((case-fold-search nil))
- (re-search-forward "^\t[^a-z]+ ([^a-z]+) --" nil t))
- 'clari-briefs)
- (t
- 'digest)))
+;;;
+;;; Deciding what document type we have
+;;;
(defun nndoc-set-delims ()
"Set the nndoc delimiter variables according to the type of the document."
nndoc-article-end nndoc-head-begin nndoc-head-end
nndoc-file-end nndoc-article-begin
nndoc-body-begin nndoc-body-end-function nndoc-body-end
- nndoc-prepare-body nndoc-article-transform
- nndoc-generate-head nndoc-body-begin-function)))
+ nndoc-prepare-body-function nndoc-article-transform-function
+ nndoc-generate-head-function nndoc-body-begin-function
+ nndoc-head-begin-function)))
(while vars
(set (pop vars) nil)))
- (let* (defs guess)
+ (let (defs)
;; Guess away until we find the real file type.
- (while (setq defs (cdr (assq nndoc-article-type nndoc-type-alist))
- guess (assq 'guess defs))
- (setq nndoc-article-type (funcall (cdr guess))))
+ (while (assq 'guess (setq defs (cdr (assq nndoc-article-type
+ nndoc-type-alist))))
+ (setq nndoc-article-type (nndoc-guess-type nndoc-article-type)))
;; Set the nndoc variables.
(while defs
(set (intern (format "nndoc-%s" (caar defs)))
(cdr (pop defs))))))
-(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-search nndoc-article-begin))
- (setq first nil)
- (when nndoc-head-begin
- (nndoc-search nndoc-head-begin))
- (if (and nndoc-file-end
- (looking-at nndoc-file-end))
- (goto-char (point-max))
- (setq head-begin (point))
- (nndoc-search (or nndoc-head-end "^$"))
- (setq head-end (point))
- (if nndoc-body-begin-function
- (funcall nndoc-body-begin-function)
- (nndoc-search (or nndoc-body-begin "^\n")))
- (setq body-begin (point))
- (or (and nndoc-body-end-function
- (funcall nndoc-body-end-function))
- (and nndoc-body-end
- (nndoc-search nndoc-body-end))
- (nndoc-search nndoc-article-begin)
- (progn
- (goto-char (point-max))
- (when nndoc-file-end
- (and (re-search-backward nndoc-file-end nil t)
- (beginning-of-line)))))
- (setq body-end (point))
- (push (list (incf i) head-begin head-end body-begin body-end
- (count-lines body-begin body-end))
- nndoc-dissection-alist))))))
-
-(defun nndoc-prepare-digest-body ()
- "Unquote quoted non-separators in digests."
- (while (re-search-forward "^- -"nil t)
- (replace-match "-" t t)))
-
-(defun nndoc-digest-body-end ()
- (and (re-search-forward nndoc-article-begin nil t)
- (goto-char (match-beginning 0))))
+(defun nndoc-guess-type (subtype)
+ (let ((alist nndoc-type-alist)
+ results result entry)
+ (while (and (not result)
+ (setq entry (pop alist)))
+ (when (memq subtype (or (cdr (assq 'subtype entry)) '(guess)))
+ (goto-char (point-min))
+ (when (numberp (setq result (funcall (intern
+ (format "nndoc-%s-type-p"
+ (car entry))))))
+ (push (cons result entry) results)
+ (setq result nil))))
+ (unless (or result results)
+ (error "Document is not of any recognized type"))
+ (if result
+ (car entry)
+ (cadar (sort results (lambda (r1 r2) (< (car r1) (car r2))))))))
+
+;;;
+;;; Built-in type predicates and functions
+;;;
+
+(defun nndoc-mbox-type-p ()
+ (when (looking-at message-unix-mail-delimiter)
+ t))
(defun nndoc-mbox-body-end ()
(let ((beg (point))
(looking-at nndoc-article-begin)))))
(goto-char len))))
+(defun nndoc-mmdf-type-p ()
+ (when (looking-at "\^A\^A\^A\^A$")
+ t))
+
+(defun nndoc-news-type-p ()
+ (when (looking-at "^Path:.*\n")
+ t))
+
+(defun nndoc-rnews-type-p ()
+ (when (looking-at "#! *rnews")
+ t))
+
(defun nndoc-rnews-body-end ()
(and (re-search-backward nndoc-article-begin nil t)
(forward-line 1)
(goto-char (+ (point) (string-to-int (match-string 1))))))
+(defun nndoc-babyl-type-p ()
+ (when (re-search-forward "\^_\^L *\n" nil t)
+ t))
+
+(defun nndoc-babyl-body-begin ()
+ (re-search-forward "^\n" nil t)
+ (when (looking-at "\*\*\* EOOH \*\*\*")
+ (re-search-forward "^\n" nil t)))
+
+(defun nndoc-babyl-head-begin ()
+ (when (re-search-forward "^[0-9].*\n" nil t)
+ (when (looking-at "\*\*\* EOOH \*\*\*")
+ (forward-line 1))
+ t))
+
+(defun nndoc-forward-type-p ()
+ (when (and (re-search-forward "^-+ Start of forwarded message -+\n+" nil t)
+ (not (re-search-forward "^Subject:.*digest" nil t)))
+ t))
+
+(defun nndoc-clari-briefs-type-p ()
+ (when (let ((case-fold-search nil))
+ (re-search-forward "^\t[^a-z]+ ([^a-z]+) --" nil t))
+ t))
+
(defun nndoc-transform-clari-briefs (article)
(goto-char (point-min))
(when (looking-at " *\\*\\(.*\\)\n")
(insert "From: " "clari@clari.net (" (or from "unknown") ")"
"\nSubject: " (or subject "(no subject)") "\n")))
-(defun nndoc-babyl-body-begin ()
- (re-search-forward "^\n" nil t)
- (when (looking-at "\*\*\* EOOH \*\*\*")
- (re-search-forward "^\n" nil t)))
+(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-search 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-search 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-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)
projects / gnus / blobdiff