1995-11-04 03:54:42 +00:00
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;;; gnus-cite.el --- parse citations in articles for Gnus
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1996-06-25 22:21:39 +00:00
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;; Copyright (C) 1995,96 Free Software Foundation, Inc.
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1995-11-04 03:54:42 +00:00
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;; Author: Per Abrahamsen <abraham@iesd.auc.dk>
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;; Keywords: news, mail
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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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1996-01-14 07:34:30 +00:00
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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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1995-11-04 03:54:42 +00:00
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;;; Commentary:
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;;; Code:
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(require 'gnus)
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(require 'gnus-msg)
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(require 'gnus-ems)
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1996-06-25 22:21:39 +00:00
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(eval-when-compile (require 'cl))
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1995-11-04 03:54:42 +00:00
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(eval-and-compile
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1996-06-25 22:21:39 +00:00
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(autoload 'gnus-article-add-button "gnus-vis"))
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1995-11-04 03:54:42 +00:00
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;;; Customization:
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1996-06-25 22:21:39 +00:00
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(defvar gnus-cited-text-button-line-format "%(%{[...]%}%)\n"
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"Format of cited text buttons.")
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(defvar gnus-cited-lines-visible nil
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"The number of lines of hidden cited text to remain visible.")
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1995-11-04 03:54:42 +00:00
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(defvar gnus-cite-parse-max-size 25000
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"Maximum article size (in bytes) where parsing citations is allowed.
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Set it to nil to parse all articles.")
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(defvar gnus-cite-prefix-regexp
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"^[]>|:}+ ]*[]>|:}+]\\(.*>\\)?\\|^.*>"
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"Regexp matching the longest possible citation prefix on a line.")
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(defvar gnus-cite-max-prefix 20
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"Maximum possible length for a citation prefix.")
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1995-11-04 03:54:42 +00:00
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(defvar gnus-supercite-regexp
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(concat "^\\(" gnus-cite-prefix-regexp "\\)? *"
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">>>>> +\"\\([^\"\n]+\\)\" +==")
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1996-06-25 22:21:39 +00:00
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"Regexp matching normal Supercite attribution lines.
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The first grouping must match prefixes added by other packages.")
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1995-11-04 03:54:42 +00:00
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(defvar gnus-supercite-secondary-regexp "^.*\"\\([^\"\n]+\\)\" +=="
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"Regexp matching mangled Supercite attribution lines.
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The first regexp group should match the Supercite attribution.")
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1995-11-04 03:54:42 +00:00
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(defvar gnus-cite-minimum-match-count 2
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"Minimum number of identical prefixes before we believe it's a citation.")
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1995-11-04 03:54:42 +00:00
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;see gnus-cus.el
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;(defvar gnus-cite-face-list
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; (if (eq gnus-display-type 'color)
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; (if (eq gnus-background-mode 'dark) 'light 'dark)
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; '(italic))
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; "Faces used for displaying different citations.
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;It is either a list of face names, or one of the following special
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;values:
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;dark: Create faces from `gnus-face-dark-name-list'.
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;light: Create faces from `gnus-face-light-name-list'.
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;The variable `gnus-make-foreground' determines whether the created
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;faces change the foreground or the background colors.")
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(defvar gnus-cite-attribution-prefix "in article\\|in <"
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"Regexp matching the beginning of an attribution line.")
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1996-06-25 22:21:39 +00:00
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(defvar gnus-cite-attribution-suffix
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"\\(wrote\\|writes\\|said\\|says\\):[ \t]*$"
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"Regexp matching the end of an attribution line.
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The text matching the first grouping will be used as a button.")
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;see gnus-cus.el
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;(defvar gnus-cite-attribution-face 'underline
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; "Face used for attribution lines.
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;It is merged with the face for the cited text belonging to the attribution.")
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;see gnus-cus.el
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;(defvar gnus-cite-hide-percentage 50
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; "Only hide cited text if it is larger than this percent of the body.")
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;see gnus-cus.el
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;(defvar gnus-cite-hide-absolute 10
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; "Only hide cited text if there is at least this number of cited lines.")
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;see gnus-cus.el
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;(defvar gnus-face-light-name-list
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; '("light blue" "light cyan" "light yellow" "light pink"
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; "pale green" "beige" "orange" "magenta" "violet" "medium purple"
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; "turquoise")
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; "Names of light colors.")
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;see gnus-cus.el
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;(defvar gnus-face-dark-name-list
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; '("dark salmon" "firebrick"
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; "dark green" "dark orange" "dark khaki" "dark violet"
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; "dark turquoise")
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; "Names of dark colors.")
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;;; Internal Variables:
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1996-06-25 22:21:39 +00:00
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(defvar gnus-cite-article nil)
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1995-11-04 03:54:42 +00:00
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(defvar gnus-cite-prefix-alist nil)
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;; Alist of citation prefixes.
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;; The cdr is a list of lines with that prefix.
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(defvar gnus-cite-attribution-alist nil)
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;; Alist of attribution lines.
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;; The car is a line number.
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;; The cdr is the prefix for the citation started by that line.
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(defvar gnus-cite-loose-prefix-alist nil)
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;; Alist of citation prefixes that have no matching attribution.
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;; The cdr is a list of lines with that prefix.
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(defvar gnus-cite-loose-attribution-alist nil)
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;; Alist of attribution lines that have no matching citation.
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;; Each member has the form (WROTE IN PREFIX TAG), where
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;; WROTE: is the attribution line number
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;; IN: is the line number of the previous line if part of the same attribution,
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;; PREFIX: Is the citation prefix of the attribution line(s), and
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1996-06-25 22:21:39 +00:00
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;; TAG: Is a Supercite tag, if any.
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(defvar gnus-cited-text-button-line-format-alist
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`((?b beg ?d)
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(?e end ?d)
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(?l (- end beg) ?d)))
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(defvar gnus-cited-text-button-line-format-spec nil)
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;;; Commands:
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(defun gnus-article-highlight-citation (&optional force)
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"Highlight cited text.
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Each citation in the article will be highlighted with a different face.
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The faces are taken from `gnus-cite-face-list'.
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Attribution lines are highlighted with the same face as the
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corresponding citation merged with `gnus-cite-attribution-face'.
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Text is considered cited if at least `gnus-cite-minimum-match-count'
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lines matches `gnus-cite-prefix-regexp' with the same prefix.
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1996-06-25 22:21:39 +00:00
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Lines matching `gnus-cite-attribution-suffix' and perhaps
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`gnus-cite-attribution-prefix' are considered attribution lines."
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(interactive (list 'force))
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;; Create dark or light faces if necessary.
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(cond ((eq gnus-cite-face-list 'light)
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(setq gnus-cite-face-list
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(mapcar 'gnus-make-face gnus-face-light-name-list)))
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((eq gnus-cite-face-list 'dark)
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(setq gnus-cite-face-list
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(mapcar 'gnus-make-face gnus-face-dark-name-list))))
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(save-excursion
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(set-buffer gnus-article-buffer)
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(gnus-cite-parse-maybe force)
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(let ((buffer-read-only nil)
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(alist gnus-cite-prefix-alist)
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(faces gnus-cite-face-list)
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(inhibit-point-motion-hooks t)
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face entry prefix skip numbers number face-alist)
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;; Loop through citation prefixes.
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(while alist
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(setq entry (car alist)
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alist (cdr alist)
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prefix (car entry)
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numbers (cdr entry)
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face (car faces)
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faces (or (cdr faces) gnus-cite-face-list)
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face-alist (cons (cons prefix face) face-alist))
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(while numbers
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(setq number (car numbers)
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numbers (cdr numbers))
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(and (not (assq number gnus-cite-attribution-alist))
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(not (assq number gnus-cite-loose-attribution-alist))
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(gnus-cite-add-face number prefix face))))
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;; Loop through attribution lines.
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(setq alist gnus-cite-attribution-alist)
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(while alist
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(setq entry (car alist)
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alist (cdr alist)
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number (car entry)
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prefix (cdr entry)
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skip (gnus-cite-find-prefix number)
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face (cdr (assoc prefix face-alist)))
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;; Add attribution button.
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(goto-line number)
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(if (re-search-forward gnus-cite-attribution-suffix
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(save-excursion (end-of-line 1) (point))
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t)
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(gnus-article-add-button (match-beginning 1) (match-end 1)
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'gnus-cite-toggle prefix))
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;; Highlight attribution line.
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(gnus-cite-add-face number skip face)
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(gnus-cite-add-face number skip gnus-cite-attribution-face))
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;; Loop through attribution lines.
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(setq alist gnus-cite-loose-attribution-alist)
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(while alist
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(setq entry (car alist)
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alist (cdr alist)
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number (car entry)
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skip (gnus-cite-find-prefix number))
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(gnus-cite-add-face number skip gnus-cite-attribution-face)))))
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1996-06-25 22:21:39 +00:00
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(defun gnus-dissect-cited-text ()
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"Dissect the article buffer looking for cited text."
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(save-excursion
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(set-buffer gnus-article-buffer)
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1996-06-25 22:21:39 +00:00
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(gnus-cite-parse-maybe)
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(let ((alist gnus-cite-prefix-alist)
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prefix numbers number marks m)
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;; Loop through citation prefixes.
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(while alist
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(setq numbers (pop alist)
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prefix (pop numbers))
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(while numbers
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(setq number (pop numbers))
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(goto-char (point-min))
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(forward-line number)
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(push (cons (point-marker) "") marks)
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(while (and numbers
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(= (1- number) (car numbers)))
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(setq number (pop numbers)))
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(goto-char (point-min))
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(forward-line (1- number))
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(push (cons (point-marker) prefix) marks)))
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(goto-char (point-min))
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(search-forward "\n\n" nil t)
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(push (cons (point-marker) "") marks)
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(goto-char (point-max))
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(re-search-backward gnus-signature-separator nil t)
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(push (cons (point-marker) "") marks)
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(setq marks (sort marks (lambda (m1 m2) (< (car m1) (car m2)))))
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(let* ((omarks marks))
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(setq marks nil)
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(while (cdr omarks)
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(if (= (caar omarks) (caadr omarks))
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(progn
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(unless (equal (cdar omarks) "")
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(push (car omarks) marks))
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(unless (equal (cdadr omarks) "")
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(push (cadr omarks) marks))
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(setq omarks (cdr omarks)))
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(push (car omarks) marks))
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(setq omarks (cdr omarks)))
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(when (car omarks)
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(push (car omarks) marks))
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(setq marks (setq m (nreverse marks)))
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(while (cddr m)
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(if (and (equal (cdadr m) "")
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(equal (cdar m) (cdaddr m))
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(goto-char (caadr m))
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(forward-line 1)
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(= (point) (caaddr m)))
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(setcdr m (cdddr m))
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(setq m (cdr m))))
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marks))))
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(defun gnus-article-fill-cited-article (&optional force)
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"Do word wrapping in the current article."
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(interactive (list t))
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(save-excursion
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(set-buffer gnus-article-buffer)
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(let ((buffer-read-only nil)
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(inhibit-point-motion-hooks t)
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(marks (gnus-dissect-cited-text))
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(adaptive-fill-mode nil))
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(save-restriction
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(while (cdr marks)
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(widen)
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(narrow-to-region (caar marks) (caadr marks))
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(let ((adaptive-fill-regexp
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(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.
|
1995-11-04 03:54:42 +00:00
|
|
|
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'."
|
1996-06-25 22:21:39 +00:00
|
|
|
(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)
|
1995-11-04 03:54:42 +00:00
|
|
|
(save-excursion
|
|
|
|
|
(set-buffer gnus-article-buffer)
|
1996-06-25 22:21:39 +00:00
|
|
|
(let ((article (cdr gnus-article-current)))
|
|
|
|
|
(unless (save-excursion
|
|
|
|
|
(set-buffer gnus-summary-buffer)
|
|
|
|
|
(gnus-article-displayed-root-p article))
|
|
|
|
|
(gnus-article-hide-citation)))))
|
1995-11-04 03:54:42 +00:00
|
|
|
|
|
|
|
|
;;; Internal functions:
|
|
|
|
|
|
|
|
|
|
(defun gnus-cite-parse-maybe (&optional force)
|
|
|
|
|
;; Parse if the buffer has changes since last time.
|
1996-06-25 22:21:39 +00:00
|
|
|
(if (equal gnus-cite-article gnus-article-current)
|
1995-11-04 03:54:42 +00:00
|
|
|
()
|
|
|
|
|
;;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))
|
|
|
|
|
()
|
1996-06-25 22:21:39 +00:00
|
|
|
(setq gnus-cite-article (cons (car gnus-article-current)
|
|
|
|
|
(cdr gnus-article-current)))
|
1995-11-04 03:54:42 +00:00
|
|
|
(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)
|
1996-06-25 22:21:39 +00:00
|
|
|
;; Ignore standard Supercite attribution prefix.
|
1995-11-04 03:54:42 +00:00
|
|
|
(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))
|
1996-06-25 22:21:39 +00:00
|
|
|
(gnus-set-text-properties 0 (length prefix) nil prefix)
|
1995-11-04 03:54:42 +00:00
|
|
|
(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)
|
1996-06-25 22:21:39 +00:00
|
|
|
(while (re-search-forward gnus-cite-attribution-suffix (point-max) t)
|
1995-11-04 03:54:42 +00:00
|
|
|
(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)
|
1996-06-25 22:21:39 +00:00
|
|
|
(not (re-search-forward gnus-cite-attribution-suffix
|
1995-11-04 03:54:42 +00:00
|
|
|
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)
|
|
|
|
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;; Match all loose attributions and citations (SORT AFTER FUN) .
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;;
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;; If SORT is `small', the citation with the shortest prefix will be
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;; used, if it is `first' the first prefix will be used, if it is
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;; `small-if-unique' the shortest prefix will be used if the
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;; attribution line does not share its own prefix with other
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;; loose attribution lines, otherwise the first prefix will be used.
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;;
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;; If AFTER is non-nil, only citations after the attribution line
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1996-01-05 22:21:28 +00:00
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;; will be considered.
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1995-11-04 03:54:42 +00:00
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;;
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;; If FUN is non-nil, it will be called with the arguments (WROTE
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;; PREFIX TAG) and expected to return a regular expression. Only
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;; citations whose prefix matches the regular expression will be
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1996-01-05 22:21:28 +00:00
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;; considered.
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1995-11-04 03:54:42 +00:00
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;;
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;; WROTE is the attribution line number.
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;; PREFIX is the attribution line prefix.
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1996-06-25 22:21:39 +00:00
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;; TAG is the Supercite tag on the attribution line.
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1995-11-04 03:54:42 +00:00
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(let ((atts gnus-cite-loose-attribution-alist)
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(case-fold-search t)
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att wrote in prefix tag regexp limit smallest best size)
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(while atts
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(setq att (car atts)
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atts (cdr atts)
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wrote (nth 0 att)
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in (nth 1 att)
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prefix (nth 2 att)
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tag (nth 3 att)
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regexp (if fun (funcall fun prefix tag) "")
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size (cond ((eq sort 'small) t)
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((eq sort 'first) nil)
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(t (< (length (gnus-cite-find-loose prefix)) 2)))
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limit (if after wrote -1)
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smallest 1000000
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best nil)
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(let ((cites gnus-cite-loose-prefix-alist)
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cite candidate numbers first compare)
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(while cites
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(setq cite (car cites)
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cites (cdr cites)
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candidate (car cite)
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numbers (cdr cite)
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first (apply 'min numbers)
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compare (if size (length candidate) first))
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(and (> first limit)
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regexp
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(string-match regexp candidate)
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(< compare smallest)
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(setq best cite
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smallest compare))))
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(if (null best)
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()
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(setq gnus-cite-loose-attribution-alist
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(delq att gnus-cite-loose-attribution-alist))
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(setq gnus-cite-attribution-alist
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(cons (cons wrote (car best)) gnus-cite-attribution-alist))
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(if in
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(setq gnus-cite-attribution-alist
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(cons (cons in (car best)) gnus-cite-attribution-alist)))
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(if (memq best gnus-cite-loose-prefix-alist)
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(let ((loop gnus-cite-prefix-alist)
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(numbers (cdr best))
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current)
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(setq gnus-cite-loose-prefix-alist
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(delq best gnus-cite-loose-prefix-alist))
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(while loop
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(setq current (car loop)
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loop (cdr loop))
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(if (eq current best)
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()
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(setcdr current (gnus-set-difference (cdr current) numbers))
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(if (null (cdr current))
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(setq gnus-cite-loose-prefix-alist
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(delq current gnus-cite-loose-prefix-alist)
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atts (delq current atts)))))))))))
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(defun gnus-cite-find-loose (prefix)
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;; Return a list of loose attribution lines prefixed by PREFIX.
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(let* ((atts gnus-cite-loose-attribution-alist)
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att line lines)
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(while atts
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(setq att (car atts)
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line (car att)
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atts (cdr atts))
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(if (string-equal (gnus-cite-find-prefix line) prefix)
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(setq lines (cons line lines))))
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lines))
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(defun gnus-cite-add-face (number prefix face)
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;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line.
|
1996-06-25 22:21:39 +00:00
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(when face
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(let ((inhibit-point-motion-hooks t)
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from to)
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(goto-line number)
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(unless (eobp) ;; Sometimes things become confused.
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1995-11-04 03:54:42 +00:00
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(forward-char (length prefix))
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(skip-chars-forward " \t")
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(setq from (point))
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(end-of-line 1)
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(skip-chars-backward " \t")
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(setq to (point))
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1996-06-25 22:21:39 +00:00
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(when (< from to)
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(gnus-overlay-put (gnus-make-overlay from to) 'face face))))))
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1995-11-04 03:54:42 +00:00
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(defun gnus-cite-toggle (prefix)
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(save-excursion
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(set-buffer gnus-article-buffer)
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(let ((buffer-read-only nil)
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(numbers (cdr (assoc prefix gnus-cite-prefix-alist)))
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(inhibit-point-motion-hooks t)
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number)
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(while numbers
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(setq number (car numbers)
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numbers (cdr numbers))
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(goto-line number)
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(cond ((get-text-property (point) 'invisible)
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(remove-text-properties (point) (progn (forward-line 1) (point))
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gnus-hidden-properties))
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((assq number gnus-cite-attribution-alist))
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(t
|
1996-06-25 22:21:39 +00:00
|
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|
(gnus-add-text-properties
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|
(point) (progn (forward-line 1) (point))
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|
(nconc (list 'gnus-type 'cite)
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|
gnus-hidden-properties))))))))
|
1995-11-04 03:54:42 +00:00
|
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|
(defun gnus-cite-find-prefix (line)
|
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|
|
|
;; Return citation prefix for LINE.
|
|
|
|
|
(let ((alist gnus-cite-prefix-alist)
|
|
|
|
|
(prefix "")
|
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|
|
entry)
|
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|
|
(while alist
|
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|
|
(setq entry (car alist)
|
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|
|
alist (cdr alist))
|
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|
|
(if (memq line (cdr entry))
|
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|
|
(setq prefix (car entry))))
|
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|
|
prefix))
|
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|
1996-06-25 22:21:39 +00:00
|
|
|
(gnus-add-shutdown 'gnus-cache-close 'gnus)
|
|
|
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|
|
(defun gnus-cache-close ()
|
|
|
|
|
(setq gnus-cite-prefix-alist nil))
|
|
|
|
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|
1995-11-04 03:54:42 +00:00
|
|
|
(gnus-ems-redefine)
|
|
|
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|
|
(provide 'gnus-cite)
|
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|
;;; gnus-cite.el ends here
|
