+ (cond
+ ;; The current buffer is this group's buffer.
+ ((and nndoc-current-buffer
+ (buffer-name nndoc-current-buffer)
+ (eq nndoc-current-buffer
+ (setq buf (cdr (assoc group nndoc-group-alist))))))
+ ;; We change buffers by taking an old from the group alist.
+ ;; `source' is either a string (a file name) or a buffer object.
+ (buf
+ (setq nndoc-current-buffer buf))
+ ;; It's a totally new group.
+ ((or (and (bufferp nndoc-address)
+ (buffer-name nndoc-address))
+ (and (stringp nndoc-address)
+ (file-exists-p nndoc-address)
+ (not (file-directory-p nndoc-address))))
+ (push (cons group (setq nndoc-current-buffer
+ (get-buffer-create
+ (concat " *nndoc " group "*"))))
+ nndoc-group-alist)
+ (setq nndoc-dissection-alist nil)
+ (save-excursion
+ (set-buffer nndoc-current-buffer)
+ (buffer-disable-undo (current-buffer))
+ (erase-buffer)
+ (if (stringp nndoc-address)
+ (nnheader-insert-file-contents nndoc-address)
+ (insert-buffer-substring nndoc-address)))))
+ ;; Initialize the nndoc structures according to this new document.
+ (when (and nndoc-current-buffer
+ (not nndoc-dissection-alist))
+ (save-excursion
+ (set-buffer nndoc-current-buffer)
+ (nndoc-set-delims)
+ (nndoc-dissect-buffer)))
+ (unless nndoc-current-buffer
+ (nndoc-close-server))
+ ;; Return whether we managed to select a file.
+ nndoc-current-buffer))
+
+;;;
+;;; Deciding what document type we have
+;;;
+
+(defun nndoc-set-delims ()
+ "Set the nndoc delimiter variables according to the type of the document."
+ (let ((vars '(nndoc-file-begin
+ nndoc-first-article
+ 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-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 away until we find the real file type.
+ (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-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-article-begin ()
+ (when (re-search-forward (concat "^" message-unix-mail-delimiter) nil t)
+ (goto-char (match-beginning 0))))
+
+(defun nndoc-mbox-body-end ()
+ (let ((beg (point))
+ len end)
+ (when
+ (save-excursion
+ (and (re-search-backward
+ (concat "^" message-unix-mail-delimiter) nil t)
+ (setq end (point))
+ (search-forward "\n\n" beg t)
+ (re-search-backward
+ "^Content-Length:[ \t]*\\([0-9]+\\) *$" end t)
+ (setq len (string-to-int (match-string 1)))
+ (search-forward "\n\n" beg t)
+ (unless (= (setq len (+ (point) len)) (point-max))
+ (and (< len (point-max))
+ (goto-char len)
+ (looking-at message-unix-mail-delimiter)))))
+ (goto-char len))))
+
+(defun nndoc-mmdf-type-p ()
+ (when (looking-at "\^A\^A\^A\^A$")
+ 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 \*\*\*")
+ (let ((next (or (save-excursion
+ (re-search-forward nndoc-article-begin nil t))
+ (point-max))))
+ (unless (re-search-forward "^\n" next t)
+ (goto-char next)
+ (forward-line -1)
+ (insert "\n")
+ (forward-line -1)))))
+
+(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))
+ (not (re-search-backward "^From:" nil t 2))
+ (not (re-search-forward "^From:" nil t 2)))
+ t))
+
+(defun nndoc-rfc934-type-p ()
+ (when (and (re-search-forward "^-+ Start of forwarded.*\n+" nil t)
+ (not (re-search-forward "^Subject:.*digest" nil t))
+ (not (re-search-backward "^From:" nil t 2))
+ (not (re-search-forward "^From:" nil t 2)))
+ 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")
+ (replace-match "" t t))
+ (nndoc-generate-clari-briefs-head article))
+
+(defun nndoc-generate-clari-briefs-head (article)
+ (let ((entry (cdr (assq article nndoc-dissection-alist)))
+ subject from)
+ (save-excursion
+ (set-buffer nndoc-current-buffer)
+ (save-restriction
+ (narrow-to-region (car entry) (nth 3 entry))
+ (goto-char (point-min))
+ (when (looking-at " *\\*\\(.*\\)$")
+ (setq subject (match-string 1))
+ (when (string-match "[ \t]+$" subject)
+ (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)))))))