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- ;;; gnus-cite.el --- parse citations in articles for Gnus
- ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
-
- ;; Author: Per Abrahamsen <abraham@iesd.auc.dk>
- ;; Keywords: news, mail
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;;; Code:
-
- (require 'gnus)
- (require 'gnus-msg)
- (require 'gnus-ems)
- (eval-when-compile (require 'cl))
-
- (eval-and-compile
- (autoload 'gnus-article-add-button "gnus-vis"))
-
- ;;; Customization:
-
- (defvar gnus-cited-text-button-line-format "%(%{[...]%}%)\n"
- "Format of cited text buttons.")
-
- (defvar gnus-cited-lines-visible nil
- "The number of lines of hidden cited text to remain visible.")
-
- (defvar gnus-cite-parse-max-size 25000
- "Maximum article size (in bytes) where parsing citations is allowed.
- Set it to nil to parse all articles.")
-
- (defvar gnus-cite-prefix-regexp
- "^[]>|:}+ ]*[]>|:}+]\\(.*>\\)?\\|^.*>"
- "Regexp matching the longest possible citation prefix on a line.")
-
- (defvar gnus-cite-max-prefix 20
- "Maximum possible length for a citation prefix.")
-
- (defvar gnus-supercite-regexp
- (concat "^\\(" gnus-cite-prefix-regexp "\\)? *"
- ">>>>> +\"\\([^\"\n]+\\)\" +==")
- "Regexp matching normal Supercite attribution lines.
- The first grouping must match prefixes added by other packages.")
-
- (defvar gnus-supercite-secondary-regexp "^.*\"\\([^\"\n]+\\)\" +=="
- "Regexp matching mangled Supercite attribution lines.
- The first regexp group should match the Supercite attribution.")
-
- (defvar gnus-cite-minimum-match-count 2
- "Minimum number of identical prefixes before we believe it's a citation.")
-
- ;see gnus-cus.el
- ;(defvar gnus-cite-face-list
- ; (if (eq gnus-display-type 'color)
- ; (if (eq gnus-background-mode 'dark) 'light 'dark)
- ; '(italic))
- ; "Faces used for displaying different citations.
- ;It is either a list of face names, or one of the following special
- ;values:
-
- ;dark: Create faces from `gnus-face-dark-name-list'.
- ;light: Create faces from `gnus-face-light-name-list'.
-
- ;The variable `gnus-make-foreground' determines whether the created
- ;faces change the foreground or the background colors.")
-
- (defvar gnus-cite-attribution-prefix "in article\\|in <"
- "Regexp matching the beginning of an attribution line.")
-
- (defvar gnus-cite-attribution-suffix
- "\\(wrote\\|writes\\|said\\|says\\):[ \t]*$"
- "Regexp matching the end of an attribution line.
- The text matching the first grouping will be used as a button.")
-
- ;see gnus-cus.el
- ;(defvar gnus-cite-attribution-face 'underline
- ; "Face used for attribution lines.
- ;It is merged with the face for the cited text belonging to the attribution.")
-
- ;see gnus-cus.el
- ;(defvar gnus-cite-hide-percentage 50
- ; "Only hide cited text if it is larger than this percent of the body.")
-
- ;see gnus-cus.el
- ;(defvar gnus-cite-hide-absolute 10
- ; "Only hide cited text if there is at least this number of cited lines.")
-
- ;see gnus-cus.el
- ;(defvar gnus-face-light-name-list
- ; '("light blue" "light cyan" "light yellow" "light pink"
- ; "pale green" "beige" "orange" "magenta" "violet" "medium purple"
- ; "turquoise")
- ; "Names of light colors.")
-
- ;see gnus-cus.el
- ;(defvar gnus-face-dark-name-list
- ; '("dark salmon" "firebrick"
- ; "dark green" "dark orange" "dark khaki" "dark violet"
- ; "dark turquoise")
- ; "Names of dark colors.")
-
- ;;; Internal Variables:
-
- (defvar gnus-cite-article nil)
-
- (defvar gnus-cite-prefix-alist nil)
- ;; Alist of citation prefixes.
- ;; The cdr is a list of lines with that prefix.
-
- (defvar gnus-cite-attribution-alist nil)
- ;; Alist of attribution lines.
- ;; The car is a line number.
- ;; The cdr is the prefix for the citation started by that line.
-
- (defvar gnus-cite-loose-prefix-alist nil)
- ;; Alist of citation prefixes that have no matching attribution.
- ;; The cdr is a list of lines with that prefix.
-
- (defvar gnus-cite-loose-attribution-alist nil)
- ;; Alist of attribution lines that have no matching citation.
- ;; Each member has the form (WROTE IN PREFIX TAG), where
- ;; WROTE: is the attribution line number
- ;; IN: is the line number of the previous line if part of the same attribution,
- ;; PREFIX: Is the citation prefix of the attribution line(s), and
- ;; TAG: Is a Supercite tag, if any.
-
- (defvar gnus-cited-text-button-line-format-alist
- `((?b beg ?d)
- (?e end ?d)
- (?l (- end beg) ?d)))
- (defvar gnus-cited-text-button-line-format-spec nil)
-
- ;;; Commands:
-
- (defun gnus-article-highlight-citation (&optional force)
- "Highlight cited text.
- Each citation in the article will be highlighted with a different face.
- The faces are taken from `gnus-cite-face-list'.
- Attribution lines are highlighted with the same face as the
- corresponding citation merged with `gnus-cite-attribution-face'.
-
- Text is considered cited if at least `gnus-cite-minimum-match-count'
- lines matches `gnus-cite-prefix-regexp' with the same prefix.
-
- Lines matching `gnus-cite-attribution-suffix' and perhaps
- `gnus-cite-attribution-prefix' are considered attribution lines."
- (interactive (list 'force))
- ;; Create dark or light faces if necessary.
- (cond ((eq gnus-cite-face-list 'light)
- (setq gnus-cite-face-list
- (mapcar 'gnus-make-face gnus-face-light-name-list)))
- ((eq gnus-cite-face-list 'dark)
- (setq gnus-cite-face-list
- (mapcar 'gnus-make-face gnus-face-dark-name-list))))
- (save-excursion
- (set-buffer gnus-article-buffer)
- (gnus-cite-parse-maybe force)
- (let ((buffer-read-only nil)
- (alist gnus-cite-prefix-alist)
- (faces gnus-cite-face-list)
- (inhibit-point-motion-hooks t)
- face entry prefix skip numbers number face-alist)
- ;; Loop through citation prefixes.
- (while alist
- (setq entry (car alist)
- alist (cdr alist)
- prefix (car entry)
- numbers (cdr entry)
- face (car faces)
- faces (or (cdr faces) gnus-cite-face-list)
- face-alist (cons (cons prefix face) face-alist))
- (while numbers
- (setq number (car numbers)
- numbers (cdr numbers))
- (and (not (assq number gnus-cite-attribution-alist))
- (not (assq number gnus-cite-loose-attribution-alist))
- (gnus-cite-add-face number prefix face))))
- ;; Loop through attribution lines.
- (setq alist gnus-cite-attribution-alist)
- (while alist
- (setq entry (car alist)
- alist (cdr alist)
- number (car entry)
- prefix (cdr entry)
- skip (gnus-cite-find-prefix number)
- face (cdr (assoc prefix face-alist)))
- ;; Add attribution button.
- (goto-line number)
- (if (re-search-forward gnus-cite-attribution-suffix
- (save-excursion (end-of-line 1) (point))
- t)
- (gnus-article-add-button (match-beginning 1) (match-end 1)
- 'gnus-cite-toggle prefix))
- ;; Highlight attribution line.
- (gnus-cite-add-face number skip face)
- (gnus-cite-add-face number skip gnus-cite-attribution-face))
- ;; Loop through attribution lines.
- (setq alist gnus-cite-loose-attribution-alist)
- (while alist
- (setq entry (car alist)
- alist (cdr alist)
- number (car entry)
- skip (gnus-cite-find-prefix number))
- (gnus-cite-add-face number skip gnus-cite-attribution-face)))))
-
- (defun gnus-dissect-cited-text ()
- "Dissect the article buffer looking for cited text."
- (save-excursion
- (set-buffer gnus-article-buffer)
- (gnus-cite-parse-maybe)
- (let ((alist gnus-cite-prefix-alist)
- prefix numbers number marks m)
- ;; Loop through citation prefixes.
- (while alist
- (setq numbers (pop alist)
- prefix (pop numbers))
- (while numbers
- (setq number (pop numbers))
- (goto-char (point-min))
- (forward-line number)
- (push (cons (point-marker) "") marks)
- (while (and numbers
- (= (1- number) (car numbers)))
- (setq number (pop numbers)))
- (goto-char (point-min))
- (forward-line (1- number))
- (push (cons (point-marker) prefix) marks)))
- (goto-char (point-min))
- (search-forward "\n\n" nil t)
- (push (cons (point-marker) "") marks)
- (goto-char (point-max))
- (re-search-backward gnus-signature-separator nil t)
- (push (cons (point-marker) "") marks)
- (setq marks (sort marks (lambda (m1 m2) (< (car m1) (car m2)))))
- (let* ((omarks marks))
- (setq marks nil)
- (while (cdr omarks)
- (if (= (caar omarks) (caadr omarks))
- (progn
- (unless (equal (cdar omarks) "")
- (push (car omarks) marks))
- (unless (equal (cdadr omarks) "")
- (push (cadr omarks) marks))
- (setq omarks (cdr omarks)))
- (push (car omarks) marks))
- (setq omarks (cdr omarks)))
- (when (car omarks)
- (push (car omarks) marks))
- (setq marks (setq m (nreverse marks)))
- (while (cddr m)
- (if (and (equal (cdadr m) "")
- (equal (cdar m) (cdaddr m))
- (goto-char (caadr m))
- (forward-line 1)
- (= (point) (caaddr m)))
- (setcdr m (cdddr m))
- (setq m (cdr m))))
- marks))))
-
-
- (defun gnus-article-fill-cited-article (&optional force)
- "Do word wrapping in the current article."
- (interactive (list t))
- (save-excursion
- (set-buffer gnus-article-buffer)
- (let ((buffer-read-only nil)
- (inhibit-point-motion-hooks t)
- (marks (gnus-dissect-cited-text))
- (adaptive-fill-mode nil))
- (save-restriction
- (while (cdr marks)
- (widen)
- (narrow-to-region (caar marks) (caadr marks))
- (let ((adaptive-fill-regexp
- (concat "^" (regexp-quote (cdar marks)) " *"))
- (fill-prefix (cdar marks)))
- (fill-region (point-min) (point-max)))
- (set-marker (caar marks) nil)
- (setq marks (cdr marks)))
- (when marks
- (set-marker (caar marks) nil))))))
-
- (defun gnus-article-hide-citation (&optional arg force)
- "Toggle hiding of all cited text except attribution lines.
- See the documentation for `gnus-article-highlight-citation'.
- If given a negative prefix, always show; if given a positive prefix,
- always hide."
- (interactive (append (gnus-hidden-arg) (list 'force)))
- (setq gnus-cited-text-button-line-format-spec
- (gnus-parse-format gnus-cited-text-button-line-format
- gnus-cited-text-button-line-format-alist t))
- (unless (gnus-article-check-hidden-text 'cite arg)
- (save-excursion
- (set-buffer gnus-article-buffer)
- (let ((buffer-read-only nil)
- (marks (gnus-dissect-cited-text))
- (inhibit-point-motion-hooks t)
- (props (nconc (list 'gnus-type 'cite)
- gnus-hidden-properties))
- beg end)
- (while marks
- (setq beg nil
- end nil)
- (while (and marks (string= (cdar marks) ""))
- (setq marks (cdr marks)))
- (when marks
- (setq beg (caar marks)))
- (while (and marks (not (string= (cdar marks) "")))
- (setq marks (cdr marks)))
- (when marks
- (setq end (caar marks)))
- ;; Skip past lines we want to leave visible.
- (when (and beg end gnus-cited-lines-visible)
- (goto-char beg)
- (forward-line gnus-cited-lines-visible)
- (if (>= (point) end)
- (setq beg nil)
- (setq beg (point-marker))))
- (when (and beg end)
- (gnus-add-text-properties beg end props)
- (goto-char beg)
- (unless (save-excursion (search-backward "\n\n" nil t))
- (insert "\n"))
- (gnus-article-add-button
- (point)
- (progn (eval gnus-cited-text-button-line-format-spec) (point))
- `gnus-article-toggle-cited-text (cons beg end))
- (set-marker beg (point))))))))
-
- (defun gnus-article-toggle-cited-text (region)
- "Toggle hiding the text in REGION."
- (let (buffer-read-only)
- (funcall
- (if (text-property-any
- (car region) (1- (cdr region))
- (car gnus-hidden-properties) (cadr gnus-hidden-properties))
- 'remove-text-properties 'gnus-add-text-properties)
- (car region) (cdr region) gnus-hidden-properties)))
-
- (defun gnus-article-hide-citation-maybe (&optional arg force)
- "Toggle hiding of cited text that has an attribution line.
- If given a negative prefix, always show; if given a positive prefix,
- always hide.
- This will do nothing unless at least `gnus-cite-hide-percentage'
- percent and at least `gnus-cite-hide-absolute' lines of the body is
- cited text with attributions. When called interactively, these two
- variables are ignored.
- See also the documentation for `gnus-article-highlight-citation'."
- (interactive (append (gnus-hidden-arg) (list 'force)))
- (unless (gnus-article-check-hidden-text 'cite arg)
- (save-excursion
- (set-buffer gnus-article-buffer)
- (gnus-cite-parse-maybe force)
- (goto-char (point-min))
- (search-forward "\n\n" nil t)
- (let ((start (point))
- (atts gnus-cite-attribution-alist)
- (buffer-read-only nil)
- (inhibit-point-motion-hooks t)
- (hiden 0)
- total)
- (goto-char (point-max))
- (re-search-backward gnus-signature-separator nil t)
- (setq total (count-lines start (point)))
- (while atts
- (setq hiden (+ hiden (length (cdr (assoc (cdar atts)
- gnus-cite-prefix-alist))))
- atts (cdr atts)))
- (if (or force
- (and (> (* 100 hiden) (* gnus-cite-hide-percentage total))
- (> hiden gnus-cite-hide-absolute)))
- (progn
- (setq atts gnus-cite-attribution-alist)
- (while atts
- (setq total (cdr (assoc (cdar atts) gnus-cite-prefix-alist))
- atts (cdr atts))
- (while total
- (setq hiden (car total)
- total (cdr total))
- (goto-line hiden)
- (or (assq hiden gnus-cite-attribution-alist)
- (gnus-add-text-properties
- (point) (progn (forward-line 1) (point))
- (nconc (list 'gnus-type 'cite)
- gnus-hidden-properties)))))))))))
-
- (defun gnus-article-hide-citation-in-followups ()
- "Hide cited text in non-root articles."
- (interactive)
- (save-excursion
- (set-buffer gnus-article-buffer)
- (let ((article (cdr gnus-article-current)))
- (unless (save-excursion
- (set-buffer gnus-summary-buffer)
- (gnus-article-displayed-root-p article))
- (gnus-article-hide-citation)))))
-
- ;;; Internal functions:
-
- (defun gnus-cite-parse-maybe (&optional force)
- ;; Parse if the buffer has changes since last time.
- (if (equal gnus-cite-article gnus-article-current)
- ()
- ;;Reset parser information.
- (setq gnus-cite-prefix-alist nil
- gnus-cite-attribution-alist nil
- gnus-cite-loose-prefix-alist nil
- gnus-cite-loose-attribution-alist nil)
- ;; Parse if not too large.
- (if (and (not force)
- gnus-cite-parse-max-size
- (> (buffer-size) gnus-cite-parse-max-size))
- ()
- (setq gnus-cite-article (cons (car gnus-article-current)
- (cdr gnus-article-current)))
- (gnus-cite-parse))))
-
- (defun gnus-cite-parse ()
- ;; Parse and connect citation prefixes and attribution lines.
-
- ;; Parse current buffer searching for citation prefixes.
- (goto-char (point-min))
- (or (search-forward "\n\n" nil t)
- (goto-char (point-max)))
- (let ((line (1+ (count-lines (point-min) (point))))
- (case-fold-search t)
- (max (save-excursion
- (goto-char (point-max))
- (re-search-backward gnus-signature-separator nil t)
- (point)))
- alist entry start begin end numbers prefix)
- ;; Get all potential prefixes in `alist'.
- (while (< (point) max)
- ;; Each line.
- (setq begin (point)
- end (progn (beginning-of-line 2) (point))
- start end)
- (goto-char begin)
- ;; Ignore standard Supercite attribution prefix.
- (if (looking-at gnus-supercite-regexp)
- (if (match-end 1)
- (setq end (1+ (match-end 1)))
- (setq end (1+ begin))))
- ;; Ignore very long prefixes.
- (if (> end (+ (point) gnus-cite-max-prefix))
- (setq end (+ (point) gnus-cite-max-prefix)))
- (while (re-search-forward gnus-cite-prefix-regexp (1- end) t)
- ;; Each prefix.
- (setq end (match-end 0)
- prefix (buffer-substring begin end))
- (gnus-set-text-properties 0 (length prefix) nil prefix)
- (setq entry (assoc prefix alist))
- (if entry
- (setcdr entry (cons line (cdr entry)))
- (setq alist (cons (list prefix line) alist)))
- (goto-char begin))
- (goto-char start)
- (setq line (1+ line)))
- ;; We got all the potential prefixes. Now create
- ;; `gnus-cite-prefix-alist' containing the oldest prefix for each
- ;; line that appears at least gnus-cite-minimum-match-count
- ;; times. First sort them by length. Longer is older.
- (setq alist (sort alist (lambda (a b)
- (> (length (car a)) (length (car b))))))
- (while alist
- (setq entry (car alist)
- prefix (car entry)
- numbers (cdr entry)
- alist (cdr alist))
- (cond ((null numbers)
- ;; No lines with this prefix that wasn't also part of
- ;; a longer prefix.
- )
- ((< (length numbers) gnus-cite-minimum-match-count)
- ;; Too few lines with this prefix. We keep it a bit
- ;; longer in case it is an exact match for an attribution
- ;; line, but we don't remove the line from other
- ;; prefixes.
- (setq gnus-cite-prefix-alist
- (cons entry gnus-cite-prefix-alist)))
- (t
- (setq gnus-cite-prefix-alist (cons entry
- gnus-cite-prefix-alist))
- ;; Remove articles from other prefixes.
- (let ((loop alist)
- current)
- (while loop
- (setq current (car loop)
- loop (cdr loop))
- (setcdr current
- (gnus-set-difference (cdr current) numbers))))))))
- ;; No citations have been connected to attribution lines yet.
- (setq gnus-cite-loose-prefix-alist (append gnus-cite-prefix-alist nil))
-
- ;; Parse current buffer searching for attribution lines.
- (goto-char (point-min))
- (search-forward "\n\n" nil t)
- (while (re-search-forward gnus-cite-attribution-suffix (point-max) t)
- (let* ((start (match-beginning 0))
- (end (match-end 0))
- (wrote (count-lines (point-min) end))
- (prefix (gnus-cite-find-prefix wrote))
- ;; Check previous line for an attribution leader.
- (tag (progn
- (beginning-of-line 1)
- (and (looking-at gnus-supercite-secondary-regexp)
- (buffer-substring (match-beginning 1)
- (match-end 1)))))
- (in (progn
- (goto-char start)
- (and (re-search-backward gnus-cite-attribution-prefix
- (save-excursion
- (beginning-of-line 0)
- (point))
- t)
- (not (re-search-forward gnus-cite-attribution-suffix
- start t))
- (count-lines (point-min) (1+ (point)))))))
- (if (eq wrote in)
- (setq in nil))
- (goto-char end)
- (setq gnus-cite-loose-attribution-alist
- (cons (list wrote in prefix tag)
- gnus-cite-loose-attribution-alist))))
- ;; Find exact supercite citations.
- (gnus-cite-match-attributions 'small nil
- (lambda (prefix tag)
- (if tag
- (concat "\\`"
- (regexp-quote prefix) "[ \t]*"
- (regexp-quote tag) ">"))))
- ;; Find loose supercite citations after attributions.
- (gnus-cite-match-attributions 'small t
- (lambda (prefix tag)
- (if tag (concat "\\<"
- (regexp-quote tag)
- "\\>"))))
- ;; Find loose supercite citations anywhere.
- (gnus-cite-match-attributions 'small nil
- (lambda (prefix tag)
- (if tag (concat "\\<"
- (regexp-quote tag)
- "\\>"))))
- ;; Find nested citations after attributions.
- (gnus-cite-match-attributions 'small-if-unique t
- (lambda (prefix tag)
- (concat "\\`" (regexp-quote prefix) ".+")))
- ;; Find nested citations anywhere.
- (gnus-cite-match-attributions 'small nil
- (lambda (prefix tag)
- (concat "\\`" (regexp-quote prefix) ".+")))
- ;; Remove loose prefixes with too few lines.
- (let ((alist gnus-cite-loose-prefix-alist)
- entry)
- (while alist
- (setq entry (car alist)
- alist (cdr alist))
- (if (< (length (cdr entry)) gnus-cite-minimum-match-count)
- (setq gnus-cite-prefix-alist
- (delq entry gnus-cite-prefix-alist)
- gnus-cite-loose-prefix-alist
- (delq entry gnus-cite-loose-prefix-alist)))))
- ;; Find flat attributions.
- (gnus-cite-match-attributions 'first t nil)
- ;; Find any attributions (are we getting desperate yet?).
- (gnus-cite-match-attributions 'first nil nil))
-
- (defun gnus-cite-match-attributions (sort after fun)
- ;; Match all loose attributions and citations (SORT AFTER FUN) .
- ;;
- ;; If SORT is `small', the citation with the shortest prefix will be
- ;; used, if it is `first' the first prefix will be used, if it is
- ;; `small-if-unique' the shortest prefix will be used if the
- ;; attribution line does not share its own prefix with other
- ;; loose attribution lines, otherwise the first prefix will be used.
- ;;
- ;; If AFTER is non-nil, only citations after the attribution line
- ;; will be considered.
- ;;
- ;; If FUN is non-nil, it will be called with the arguments (WROTE
- ;; PREFIX TAG) and expected to return a regular expression. Only
- ;; citations whose prefix matches the regular expression will be
- ;; considered.
- ;;
- ;; WROTE is the attribution line number.
- ;; PREFIX is the attribution line prefix.
- ;; TAG is the Supercite tag on the attribution line.
- (let ((atts gnus-cite-loose-attribution-alist)
- (case-fold-search t)
- att wrote in prefix tag regexp limit smallest best size)
- (while atts
- (setq att (car atts)
- atts (cdr atts)
- wrote (nth 0 att)
- in (nth 1 att)
- prefix (nth 2 att)
- tag (nth 3 att)
- regexp (if fun (funcall fun prefix tag) "")
- size (cond ((eq sort 'small) t)
- ((eq sort 'first) nil)
- (t (< (length (gnus-cite-find-loose prefix)) 2)))
- limit (if after wrote -1)
- smallest 1000000
- best nil)
- (let ((cites gnus-cite-loose-prefix-alist)
- cite candidate numbers first compare)
- (while cites
- (setq cite (car cites)
- cites (cdr cites)
- candidate (car cite)
- numbers (cdr cite)
- first (apply 'min numbers)
- compare (if size (length candidate) first))
- (and (> first limit)
- regexp
- (string-match regexp candidate)
- (< compare smallest)
- (setq best cite
- smallest compare))))
- (if (null best)
- ()
- (setq gnus-cite-loose-attribution-alist
- (delq att gnus-cite-loose-attribution-alist))
- (setq gnus-cite-attribution-alist
- (cons (cons wrote (car best)) gnus-cite-attribution-alist))
- (if in
- (setq gnus-cite-attribution-alist
- (cons (cons in (car best)) gnus-cite-attribution-alist)))
- (if (memq best gnus-cite-loose-prefix-alist)
- (let ((loop gnus-cite-prefix-alist)
- (numbers (cdr best))
- current)
- (setq gnus-cite-loose-prefix-alist
- (delq best gnus-cite-loose-prefix-alist))
- (while loop
- (setq current (car loop)
- loop (cdr loop))
- (if (eq current best)
- ()
- (setcdr current (gnus-set-difference (cdr current) numbers))
- (if (null (cdr current))
- (setq gnus-cite-loose-prefix-alist
- (delq current gnus-cite-loose-prefix-alist)
- atts (delq current atts)))))))))))
-
- (defun gnus-cite-find-loose (prefix)
- ;; Return a list of loose attribution lines prefixed by PREFIX.
- (let* ((atts gnus-cite-loose-attribution-alist)
- att line lines)
- (while atts
- (setq att (car atts)
- line (car att)
- atts (cdr atts))
- (if (string-equal (gnus-cite-find-prefix line) prefix)
- (setq lines (cons line lines))))
- lines))
-
- (defun gnus-cite-add-face (number prefix face)
- ;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line.
- (when face
- (let ((inhibit-point-motion-hooks t)
- from to)
- (goto-line number)
- (unless (eobp) ;; Sometimes things become confused.
- (forward-char (length prefix))
- (skip-chars-forward " \t")
- (setq from (point))
- (end-of-line 1)
- (skip-chars-backward " \t")
- (setq to (point))
- (when (< from to)
- (gnus-overlay-put (gnus-make-overlay from to) 'face face))))))
-
- (defun gnus-cite-toggle (prefix)
- (save-excursion
- (set-buffer gnus-article-buffer)
- (let ((buffer-read-only nil)
- (numbers (cdr (assoc prefix gnus-cite-prefix-alist)))
- (inhibit-point-motion-hooks t)
- number)
- (while numbers
- (setq number (car numbers)
- numbers (cdr numbers))
- (goto-line number)
- (cond ((get-text-property (point) 'invisible)
- (remove-text-properties (point) (progn (forward-line 1) (point))
- gnus-hidden-properties))
- ((assq number gnus-cite-attribution-alist))
- (t
- (gnus-add-text-properties
- (point) (progn (forward-line 1) (point))
- (nconc (list 'gnus-type 'cite)
- gnus-hidden-properties))))))))
-
- (defun gnus-cite-find-prefix (line)
- ;; Return citation prefix for LINE.
- (let ((alist gnus-cite-prefix-alist)
- (prefix "")
- entry)
- (while alist
- (setq entry (car alist)
- alist (cdr alist))
- (if (memq line (cdr entry))
- (setq prefix (car entry))))
- prefix))
-
- (gnus-add-shutdown 'gnus-cache-close 'gnus)
-
- (defun gnus-cache-close ()
- (setq gnus-cite-prefix-alist nil))
-
- (gnus-ems-redefine)
-
- (provide 'gnus-cite)
-
- ;;; gnus-cite.el ends here
-