;;; gnus-cite.el --- parse citations in articles for Gnus
-;; Copyright (C) 1995 Free Software Foundation, Inc.
-;; Author: Per Abrahamsen <abraham@iesd.auc.dk>
-;; Keywords: news, mail
+;; Copyright (C) 1995-2013 Free Software Foundation, Inc.
+
+;; Author: Per Abhiddenware
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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.
+;; the Free Software Foundation, either version 3 of the License, 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
;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
-(require 'gnus)
-(require 'gnus-msg)
-(require 'gnus-ems)
+(eval-when-compile (require 'cl))
+(eval-when-compile
+ (when (featurep 'xemacs)
+ (require 'easy-mmode))) ; for `define-minor-mode'
-(eval-and-compile
- (autoload 'gnus-article-add-button "gnus-vis")
- )
+(require 'gnus)
+(require 'gnus-range)
+(require 'gnus-art)
+(require 'message) ; for message-cite-prefix-regexp
;;; Customization:
-(defvar gnus-cite-prefix-regexp
- "^[]>|:}+ ]*[]>|:}+]\\(.*>\\)?\\|^.*>"
- "Regexp matching the longest possible citation prefix on a line.")
+(defgroup gnus-cite nil
+ "Citation."
+ :prefix "gnus-cite-"
+ :link '(custom-manual "(gnus)Article Highlighting")
+ :group 'gnus-article)
+
+(defcustom gnus-cited-opened-text-button-line-format "%(%{[-]%}%)\n"
+ "Format of opened cited text buttons."
+ :group 'gnus-cite
+ :type 'string)
+
+(defcustom gnus-cited-closed-text-button-line-format "%(%{[+]%}%)\n"
+ "Format of closed cited text buttons."
+ :group 'gnus-cite
+ :type 'string)
-(defvar gnus-cite-max-prefix 20
- "Maximal possible length for a citation prefix.")
+(defcustom gnus-cited-lines-visible nil
+ "The number of lines of hidden cited text to remain visible.
+Or a pair (cons) of numbers which are the number of lines at the top
+and bottom of the text, respectively, to remain visible."
+ :group 'gnus-cite
+ :type '(choice (const :tag "none" nil)
+ integer
+ (cons :tag "Top and Bottom" integer integer)))
-(defvar gnus-supercite-regexp
- (concat "^\\(" gnus-cite-prefix-regexp "\\)? *"
+(defcustom gnus-cite-parse-max-size 25000
+ "Maximum article size (in bytes) where parsing citations is allowed.
+Set it to nil to parse all articles."
+ :group 'gnus-cite
+ :type '(choice (const :tag "all" nil)
+ integer))
+
+(defcustom gnus-cite-max-prefix 20
+ "Maximum possible length for a citation prefix."
+ :group 'gnus-cite
+ :type 'integer)
+
+(defcustom gnus-supercite-regexp
+ (concat "^\\(" message-cite-prefix-regexp "\\)? *"
">>>>> +\"\\([^\"\n]+\\)\" +==")
- "Regexp matching normal SuperCite attribution lines.
-The first regexp group should match a prefix added by another package.")
-
-(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
- "Minimal number of identical prefix'es before we believe it is 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-postfix
- "\\(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.")
+ "*Regexp matching normal Supercite attribution lines.
+The first grouping must match prefixes added by other packages."
+ :group 'gnus-cite
+ :type 'regexp)
+
+(defcustom gnus-supercite-secondary-regexp "^.*\"\\([^\"\n]+\\)\" +=="
+ "Regexp matching mangled Supercite attribution lines.
+The first regexp group should match the Supercite attribution."
+ :group 'gnus-cite
+ :type 'regexp)
+
+(defcustom gnus-cite-minimum-match-count 2
+ "Minimum number of identical prefixes before we believe it's a citation."
+ :group 'gnus-cite
+ :type 'integer)
+
+;; Some Microsoft products put in a citation that extends to the
+;; remainder of the message:
+;;
+;; -----Original Message-----
+;; From: ...
+;; To: ...
+;; Sent: ... [date, in non-RFC-2822 format]
+;; Subject: ...
+;;
+;; Cited message, with no prefixes
+;;
+;; The four headers are always the same. But note they are prone to
+;; folding without additional indentation.
+;;
+;; Others use "----- Original Message -----" instead, and properly quote
+;; the body using "> ". This style is handled without special cases.
+
+(defcustom gnus-cite-attribution-prefix
+ "In article\\|in <\\|On \\(Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\|Sun\\),\\|----- ?Original Message ?-----"
+ "*Regexp matching the beginning of an attribution line."
+ :group 'gnus-cite
+ :type 'regexp)
+
+(defcustom gnus-cite-attribution-suffix
+ "\\(\\(wrote\\|writes\\|said\\|says\\|>\\)\\(:\\|\\.\\.\\.\\)\\|----- ?Original Message ?-----\\)[ \t]*$"
+ "*Regexp matching the end of an attribution line.
+The text matching the first grouping will be used as a button."
+ :group 'gnus-cite
+ :type 'regexp)
+
+(defcustom gnus-cite-unsightly-citation-regexp
+ "^-----Original Message-----\nFrom: \\(.+\n\\)+\n"
+ "Regexp matching Microsoft-type rest-of-message citations."
+ :version "22.1"
+ :group 'gnus-cite
+ :type 'regexp)
+
+(defcustom gnus-cite-ignore-quoted-from t
+ "Non-nil means don't regard lines beginning with \">From \" as cited text.
+Those lines may have been quoted by MTAs in order not to mix up with
+the envelope From line."
+ :version "22.1"
+ :group 'gnus-cite
+ :type 'boolean)
+
+(defface gnus-cite-attribution '((t (:italic t)))
+ "Face used for attribution lines."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-attribution-face 'face-alias 'gnus-cite-attribution)
+(put 'gnus-cite-attribution-face 'obsolete-face "22.1")
+
+(defcustom gnus-cite-attribution-face 'gnus-cite-attribution
+ "Face used for attribution lines.
+It is merged with the face for the cited text belonging to the attribution."
+ :version "22.1"
+ :group 'gnus-cite
+ :type 'face)
+
+(defface gnus-cite-1 '((((class color)
+ (background dark))
+ (:foreground "light blue"))
+ (((class color)
+ (background light))
+ (:foreground "MidnightBlue"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-1 'face-alias 'gnus-cite-1)
+(put 'gnus-cite-face-1 'obsolete-face "22.1")
+
+(defface gnus-cite-2 '((((class color)
+ (background dark))
+ (:foreground "light cyan"))
+ (((class color)
+ (background light))
+ (:foreground "firebrick"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-2 'face-alias 'gnus-cite-2)
+(put 'gnus-cite-face-2 'obsolete-face "22.1")
+
+(defface gnus-cite-3 '((((class color)
+ (background dark))
+ (:foreground "light yellow"))
+ (((class color)
+ (background light))
+ (:foreground "dark green"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-3 'face-alias 'gnus-cite-3)
+(put 'gnus-cite-face-3 'obsolete-face "22.1")
+
+(defface gnus-cite-4 '((((class color)
+ (background dark))
+ (:foreground "light pink"))
+ (((class color)
+ (background light))
+ (:foreground "OrangeRed"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-4 'face-alias 'gnus-cite-4)
+(put 'gnus-cite-face-4 'obsolete-face "22.1")
+
+(defface gnus-cite-5 '((((class color)
+ (background dark))
+ (:foreground "pale green"))
+ (((class color)
+ (background light))
+ (:foreground "dark khaki"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-5 'face-alias 'gnus-cite-5)
+(put 'gnus-cite-face-5 'obsolete-face "22.1")
+
+(defface gnus-cite-6 '((((class color)
+ (background dark))
+ (:foreground "beige"))
+ (((class color)
+ (background light))
+ (:foreground "dark violet"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-6 'face-alias 'gnus-cite-6)
+(put 'gnus-cite-face-6 'obsolete-face "22.1")
+
+(defface gnus-cite-7 '((((class color)
+ (background dark))
+ (:foreground "orange"))
+ (((class color)
+ (background light))
+ (:foreground "SteelBlue4"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-7 'face-alias 'gnus-cite-7)
+(put 'gnus-cite-face-7 'obsolete-face "22.1")
+
+(defface gnus-cite-8 '((((class color)
+ (background dark))
+ (:foreground "magenta"))
+ (((class color)
+ (background light))
+ (:foreground "magenta"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-8 'face-alias 'gnus-cite-8)
+(put 'gnus-cite-face-8 'obsolete-face "22.1")
+
+(defface gnus-cite-9 '((((class color)
+ (background dark))
+ (:foreground "violet"))
+ (((class color)
+ (background light))
+ (:foreground "violet"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-9 'face-alias 'gnus-cite-9)
+(put 'gnus-cite-face-9 'obsolete-face "22.1")
+
+(defface gnus-cite-10 '((((class color)
+ (background dark))
+ (:foreground "plum1"))
+ (((class color)
+ (background light))
+ (:foreground "medium purple"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-10 'face-alias 'gnus-cite-10)
+(put 'gnus-cite-face-10 'obsolete-face "22.1")
+
+(defface gnus-cite-11 '((((class color)
+ (background dark))
+ (:foreground "turquoise"))
+ (((class color)
+ (background light))
+ (:foreground "turquoise"))
+ (t
+ (:italic t)))
+ "Citation face."
+ :group 'gnus-cite)
+;; backward-compatibility alias
+(put 'gnus-cite-face-11 'face-alias 'gnus-cite-11)
+(put 'gnus-cite-face-11 'obsolete-face "22.1")
+
+(defcustom gnus-cite-face-list
+ '(gnus-cite-1 gnus-cite-2 gnus-cite-3 gnus-cite-4 gnus-cite-5 gnus-cite-6
+ gnus-cite-7 gnus-cite-8 gnus-cite-9 gnus-cite-10 gnus-cite-11)
+ "*List of faces used for highlighting citations.
+
+When there are citations from multiple articles in the same message,
+Gnus will try to give each citation from each article its own face.
+This should make it easier to see who wrote what."
+ :group 'gnus-cite
+ :type '(repeat face)
+ :set (lambda (symbol value)
+ (prog1
+ (custom-set-default symbol value)
+ (if (boundp 'gnus-message-max-citation-depth)
+ (setq gnus-message-max-citation-depth (length value)))
+ (if (boundp 'gnus-message-citation-keywords)
+ (setq gnus-message-citation-keywords
+ `((gnus-message-search-citation-line
+ ,@(let ((list nil)
+ (count 1))
+ (dolist (face value (nreverse list))
+ (push (list count (list 'quote face) 'prepend t)
+ list)
+ (setq count (1+ count)))))))))))
+
+(defcustom gnus-cite-hide-percentage 50
+ "Only hide excess citation if above this percentage of the body."
+ :group 'gnus-cite
+ :type 'number)
+
+(defcustom gnus-cite-hide-absolute 10
+ "Only hide excess citation if above this number of lines in the body."
+ :group 'gnus-cite
+ :type 'integer)
+
+(defcustom gnus-cite-blank-line-after-header t
+ "If non-nil, put a blank line between the citation header and the button."
+ :group 'gnus-cite
+ :type 'boolean)
+
+;; This has to go here because its default value depends on
+;; gnus-cite-face-list.
+(defcustom gnus-article-boring-faces (cons 'gnus-signature gnus-cite-face-list)
+ "List of faces that are not worth reading.
+If an article has more pages below the one you are looking at, but
+nothing on those pages is a word of at least three letters that is not
+in a boring face, then the pages will be skipped."
+ :type '(repeat face)
+ :group 'gnus-article-hiding)
;;; Internal Variables:
-(defvar gnus-article-length nil)
-;; Length of article last time we parsed it.
-;; BUG! KLUDGE! UGLY! FIX ME!
+(defvar gnus-cite-article nil)
+(defvar gnus-cite-overlay-list nil)
(defvar gnus-cite-prefix-alist nil)
-;; Alist of citation prefixes.
+;; Alist of citation prefixes.
;; The cdr is a list of lines with that prefix.
(defvar gnus-cite-attribution-alist nil)
;; 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.
+;; TAG: Is a Supercite tag, if any.
+
+(defvar gnus-cited-opened-text-button-line-format-alist
+ `((?b (marker-position beg) ?d)
+ (?e (marker-position end) ?d)
+ (?n (count-lines beg end) ?d)
+ (?l (- end beg) ?d)))
+(defvar gnus-cited-opened-text-button-line-format-spec nil)
+(defvar gnus-cited-closed-text-button-line-format-alist
+ gnus-cited-opened-text-button-line-format-alist)
+(defvar gnus-cited-closed-text-button-line-format-spec nil)
+
;;; Commands:
-(defun gnus-article-highlight-citation ()
+(defun gnus-article-highlight-citation (&optional force same-buffer)
"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'.
+corresponding citation merged with the face `gnus-cite-attribution'.
Text is considered cited if at least `gnus-cite-minimum-match-count'
-lines matches `gnus-cite-prefix-regexp' with the same prefix.
+lines matches `message-cite-prefix-regexp' with the same prefix.
-Lines matching `gnus-cite-attribution-postfix' and perhaps
+Lines matching `gnus-cite-attribution-suffix' and perhaps
`gnus-cite-attribution-prefix' are considered attribution lines."
- (interactive)
- ;; 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)
+ (interactive (list 'force))
+ (with-current-buffer (if same-buffer (current-buffer) gnus-article-buffer)
+ (gnus-cite-parse-maybe force)
(let ((buffer-read-only nil)
(alist gnus-cite-prefix-alist)
(faces gnus-cite-face-list)
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-postfix
- (save-excursion (end-of-line 1) (point))
- t)
- (gnus-article-add-button (match-beginning 1) (match-end 1)
- 'gnus-cite-toggle prefix))
+ (goto-char (point-min))
+ (forward-line (1- number))
+ (when (re-search-forward gnus-cite-attribution-suffix
+ (point-at-eol)
+ 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))
skip (gnus-cite-find-prefix number))
(gnus-cite-add-face number skip gnus-cite-attribution-face)))))
-(defun gnus-article-hide-citation ()
- "Hide all cited text except attribution lines.
-See the documentation for `gnus-article-highlight-citation'."
- (interactive)
- (save-excursion
- (set-buffer gnus-article-buffer)
- (gnus-cite-parse-maybe)
- (let ((buffer-read-only nil)
- (alist gnus-cite-prefix-alist)
- (inhibit-point-motion-hooks t)
- numbers number)
+(defun gnus-dissect-cited-text ()
+ "Dissect the article buffer looking for cited text."
+ (with-current-buffer gnus-article-buffer
+ (gnus-cite-parse-maybe nil t)
+ (let ((alist gnus-cite-prefix-alist)
+ prefix numbers number marks m)
+ ;; Loop through citation prefixes.
(while alist
- (setq numbers (cdr (car alist))
- alist (cdr alist))
+ (setq numbers (pop alist)
+ prefix (pop numbers))
(while numbers
- (setq number (car numbers)
- numbers (cdr numbers))
- (goto-line number)
- (or (assq number gnus-cite-attribution-alist)
- (add-text-properties (point) (progn (forward-line 1) (point))
- gnus-hidden-properties)))))))
+ (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)))
+ ;; Skip to the beginning of the body.
+ (article-goto-body)
+ (push (cons (point-marker) "") marks)
+ ;; Find the end of the body.
+ (goto-char (point-max))
+ (gnus-article-search-signature)
+ (push (cons (point-marker) "") marks)
+ ;; Sort the marks.
+ (setq marks (sort marks 'car-less-than-car))
+ (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))
+ (unless (and (equal (cdar omarks) "")
+ (equal (cdadr omarks) "")
+ (not (cddr omarks)))
+ (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))
+ (looking-at "[ \t]*$")
+ (forward-line 1)
+ (= (point) (caaddr m)))
+ (setcdr m (cdddr m))
+ (setq m (cdr m))))
+ marks))))
+
+(defun gnus-article-fill-cited-long-lines ()
+ (gnus-article-fill-cited-article nil t))
+
+(defun gnus-article-fill-cited-article (&optional width long-lines)
+ "Do word wrapping in the current article.
+If WIDTH (the numerical prefix), use that text width when
+filling. If LONG-LINES, only fill sections that have lines
+longer than the frame width."
+ (interactive "P")
+ (with-current-buffer gnus-article-buffer
+ (let ((buffer-read-only nil)
+ (inhibit-point-motion-hooks t)
+ (marks (gnus-dissect-cited-text))
+ (adaptive-fill-mode nil)
+ (filladapt-mode nil)
+ (fill-column (if width (prefix-numeric-value width) fill-column)))
+ (save-restriction
+ (while (cdr marks)
+ (narrow-to-region (caar marks) (caadr marks))
+ (let ((adaptive-fill-regexp
+ (concat "^" (regexp-quote (cdar marks)) " *"))
+ (fill-prefix
+ (if (string= (cdar marks) "") ""
+ (concat (cdar marks) " ")))
+ (do-fill (not long-lines))
+ use-hard-newlines)
+ (unless do-fill
+ (setq do-fill (gnus-article-foldable-buffer (cdar marks))))
+ ;; Note: the XEmacs version of `fill-region' inserts a newline
+ ;; unless the region ends with a newline.
+ (when do-fill
+ (if (not long-lines)
+ (fill-region (point-min) (point-max))
+ (goto-char (point-min))
+ (while (not (eobp))
+ (end-of-line)
+ (when (prog1
+ (> (current-column) (window-width))
+ (forward-line 1))
+ (save-restriction
+ (narrow-to-region (line-beginning-position 0) (point))
+ (fill-region (point-min) (point-max))))))))
+ (set-marker (caar marks) nil)
+ (setq marks (cdr marks)))
+ (when marks
+ (set-marker (caar marks) nil))
+ ;; All this information is now incorrect.
+ (setq gnus-cite-prefix-alist nil
+ gnus-cite-attribution-alist nil
+ gnus-cite-loose-prefix-alist nil
+ gnus-cite-loose-attribution-alist nil
+ gnus-cite-article nil)))))
+
+(defun gnus-article-foldable-buffer (prefix)
+ (let ((do-fill nil)
+ columns)
+ (goto-char (point-min))
+ (while (not (eobp))
+ (unless (> (length prefix) (- (point-max) (point)))
+ (forward-char (length prefix)))
+ (skip-chars-forward " \t")
+ (unless (eolp)
+ (let ((elem (assq (current-column) columns)))
+ (unless elem
+ (setq elem (cons (current-column) 0))
+ (push elem columns))
+ (setcdr elem (1+ (cdr elem)))))
+ (end-of-line)
+ (when (> (current-column) (window-width))
+ (setq do-fill t))
+ (forward-line 1))
+ (and do-fill
+ ;; We know know that there are long lines here, but does this look
+ ;; like code? Check for ragged edges on the left.
+ (< (length columns) 3))))
+
+(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-article-hidden-arg) (list 'force)))
+ (gnus-set-format 'cited-opened-text-button t)
+ (gnus-set-format 'cited-closed-text-button t)
+ (with-current-buffer gnus-article-buffer
+ (let ((buffer-read-only nil)
+ marks
+ (inhibit-point-motion-hooks t)
+ (props (nconc (list 'article-type 'cite)
+ gnus-hidden-properties))
+ (point (point-min))
+ found beg end start)
+ (while (setq point
+ (text-property-any point (point-max)
+ 'gnus-callback
+ 'gnus-article-toggle-cited-text))
+ (setq found t)
+ (goto-char point)
+ (gnus-article-toggle-cited-text
+ (get-text-property point 'gnus-data) arg)
+ (forward-line 1)
+ (setq point (point)))
+ (unless found
+ (setq marks (gnus-dissect-cited-text))
+ (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 (if (consp gnus-cited-lines-visible)
+ (car gnus-cited-lines-visible)
+ gnus-cited-lines-visible))
+ (if (>= (point) end)
+ (setq beg nil)
+ (setq beg (point-marker))
+ (when (consp gnus-cited-lines-visible)
+ (goto-char end)
+ (forward-line (- (cdr gnus-cited-lines-visible)))
+ (if (<= (point) beg)
+ (setq beg nil)
+ (setq end (point-marker))))))
+ (when (and beg end)
+ (gnus-add-wash-type 'cite)
+ ;; We use markers for the end-points to facilitate later
+ ;; wrapping and mangling of text.
+ (setq beg (set-marker (make-marker) beg)
+ end (set-marker (make-marker) end))
+ (gnus-add-text-properties-when 'article-type nil beg end props)
+ (goto-char beg)
+ (when (and gnus-cite-blank-line-after-header
+ (not (save-excursion (search-backward "\n\n" nil t))))
+ (insert "\n"))
+ (put-text-property
+ (setq start (point-marker))
+ (progn
+ (gnus-article-add-button
+ (point)
+ (progn (eval gnus-cited-closed-text-button-line-format-spec)
+ (point))
+ `gnus-article-toggle-cited-text
+ (list (cons beg end) start))
+ (point))
+ 'article-type 'annotation)
+ (set-marker beg (point))))))))
-(defun gnus-article-hide-citation-maybe (&optional force)
- "Hide cited text that has an attribution line.
+(defun gnus-article-toggle-cited-text (args &optional arg)
+ "Toggle hiding the text in REGION.
+ARG can be nil or a number. Positive means hide, negative
+means show, nil means toggle."
+ (let* ((region (car args))
+ (beg (car region))
+ (end (cdr region))
+ (start (cadr args))
+ (hidden
+ (text-property-any beg (1- end) 'article-type 'cite))
+ (inhibit-point-motion-hooks t)
+ buffer-read-only)
+ (when (or (null arg)
+ (zerop arg)
+ (and (> arg 0) (not hidden))
+ (and (< arg 0) hidden))
+ (if hidden
+ (progn
+ ;; Can't remove 'cite from g-a-wash-types here because
+ ;; multiple citations may be hidden -jas
+ (gnus-remove-text-properties-when
+ 'article-type 'cite beg end
+ (cons 'article-type (cons 'cite
+ gnus-hidden-properties))))
+ (gnus-add-wash-type 'cite)
+ (gnus-add-text-properties-when
+ 'article-type nil beg end
+ (cons 'article-type (cons 'cite
+ gnus-hidden-properties))))
+ (let ((gnus-article-mime-handle-alist-1 gnus-article-mime-handle-alist))
+ (gnus-set-mode-line 'article))
+ (save-excursion
+ (goto-char start)
+ (gnus-delete-line)
+ (put-text-property
+ (point)
+ (progn
+ (gnus-article-add-button
+ (point)
+ (progn (eval
+ (if hidden
+ gnus-cited-opened-text-button-line-format-spec
+ gnus-cited-closed-text-button-line-format-spec))
+ (point))
+ `gnus-article-toggle-cited-text
+ args)
+ (point))
+ 'article-type 'annotation)))))
+
+(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 (list 'force))
- (save-excursion
- (set-buffer gnus-article-buffer)
- (gnus-cite-parse-maybe)
- (goto-char (point-min))
- (search-forward "\n\n")
- (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 (cdr (car 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 (cdr (car 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)
- (add-text-properties (point)
- (progn (forward-line 1) (point))
- gnus-hidden-properties)))))))))
+ (interactive (append (gnus-article-hidden-arg) '(force)))
+ (with-current-buffer gnus-article-buffer
+ (gnus-delete-wash-type 'cite)
+ (unless (gnus-article-check-hidden-text 'cite arg)
+ (save-excursion
+ (gnus-cite-parse-maybe force)
+ (article-goto-body)
+ (let ((start (point))
+ (atts gnus-cite-attribution-alist)
+ (buffer-read-only nil)
+ (inhibit-point-motion-hooks t)
+ (hidden 0)
+ total)
+ (goto-char (point-max))
+ (gnus-article-search-signature)
+ (setq total (count-lines start (point)))
+ (while atts
+ (setq hidden (+ hidden (length
+ (cdr (assoc (cdar atts)
+ gnus-cite-prefix-alist))))
+ atts (cdr atts)))
+ (when (or force
+ (and (> (* 100 hidden) (* gnus-cite-hide-percentage total))
+ (> hidden gnus-cite-hide-absolute)))
+ (gnus-article-hide-citation)))))))
+
+(defun gnus-article-hide-citation-in-followups ()
+ "Hide cited text in non-root articles."
+ (interactive)
+ (with-current-buffer gnus-article-buffer
+ (let ((article (cdr gnus-article-current)))
+ (unless (with-current-buffer gnus-summary-buffer
+ (gnus-article-displayed-root-p article))
+ (gnus-article-hide-citation)))))
;;; Internal functions:
-(defun gnus-cite-parse-maybe ()
- ;; Parse if the buffer has changes since last time.
- (if (eq gnus-article-length (- (point-max) (point-min)))
+(defun gnus-cite-parse-maybe (&optional force no-overlay)
+ "Always parse the buffer."
+ (gnus-cite-localize)
+ ;;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)
+ (unless no-overlay
+ (gnus-cite-delete-overlays))
+ ;; Parse if not too large.
+ (if (and gnus-cite-parse-max-size
+ (> (buffer-size) gnus-cite-parse-max-size))
()
- (setq gnus-article-length (- (point-max) (point-min)))
- (gnus-cite-parse)))
+ (setq gnus-cite-article (cons (car gnus-article-current)
+ (cdr gnus-article-current)))
+ (gnus-cite-parse-wrapper)))
+
+(defun gnus-cite-delete-overlays ()
+ (dolist (overlay gnus-cite-overlay-list)
+ (ignore-errors
+ (when (or (not (gnus-overlay-end overlay))
+ (and (>= (gnus-overlay-end overlay) (point-min))
+ (<= (gnus-overlay-end overlay) (point-max))))
+ (setq gnus-cite-overlay-list (delete overlay gnus-cite-overlay-list))
+ (ignore-errors
+ (gnus-delete-overlay overlay))))))
+
+(defun gnus-cite-parse-wrapper ()
+ ;; Wrap chopped gnus-cite-parse.
+ (article-goto-body)
+ (let ((inhibit-point-motion-hooks t))
+ (save-excursion
+ (gnus-cite-parse-attributions))
+ (save-excursion
+ (gnus-cite-parse))
+ (save-excursion
+ (gnus-cite-connect-attributions))))
(defun gnus-cite-parse ()
;; Parse and connect citation prefixes and attribution lines.
- (setq gnus-cite-prefix-alist nil
- gnus-cite-attribution-alist nil
- gnus-cite-loose-prefix-alist nil
- gnus-cite-loose-attribution-alist nil)
+
;; 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)
+ (gnus-article-search-signature)
(point)))
- alist entry start begin end numbers prefix)
+ (prefix-regexp (concat "^\\(" message-cite-prefix-regexp "\\)"))
+ alist entry start begin end numbers prefix guess-limit)
;; Get all potential prefixes in `alist'.
(while (< (point) max)
;; Each line.
(setq begin (point)
- end (progn (beginning-of-line 2) (point))
+ guess-limit (progn (skip-chars-forward "^> \t\r\n") (point))
+ end (point-at-bol 2)
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 standard Supercite attribution prefix.
+ (when (and (< guess-limit (+ begin gnus-cite-max-prefix))
+ (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)
+ (when (> end (+ begin gnus-cite-max-prefix))
+ (setq end (+ begin gnus-cite-max-prefix)))
+ ;; Ignore quoted envelope From_.
+ (when (and gnus-cite-ignore-quoted-from
+ (prog2
+ (setq case-fold-search nil)
+ (looking-at ">From ")
+ (setq case-fold-search t)))
+ (setq end (1+ begin)))
+ (while (re-search-forward prefix-regexp (1- end) t)
;; Each prefix.
(setq end (match-end 0)
prefix (buffer-substring begin end))
(set-text-properties 0 (length prefix) nil prefix)
(setq entry (assoc prefix alist))
- (if entry
+ (if entry
(setcdr entry (cons line (cdr entry)))
- (setq alist (cons (list prefix line) alist)))
+ (push (list prefix line) alist))
(goto-char begin))
(goto-char start)
(setq line (1+ line)))
+ ;; Horrible special case for some Microsoft mailers.
+ (goto-char (point-min))
+ (setq start t begin nil entry nil)
+ (while start
+ ;; Assume this search ends up at the beginning of a line.
+ (if (re-search-forward gnus-cite-unsightly-citation-regexp max t)
+ (progn
+ (when (number-or-marker-p start)
+ (setq begin (count-lines (point-min) start)
+ end (count-lines (point-min) (match-beginning 0))))
+ (setq start (match-end 0)))
+ (when (number-or-marker-p start)
+ (setq begin (count-lines (point-min) start)
+ end (count-lines (point-min) max)))
+ (setq start nil))
+ (when begin
+ (while (< begin end)
+ ;; Need to do 1+ because we're in the bol.
+ (push (setq begin (1+ begin)) entry))))
+ (when entry
+ (push (cons "" entry) alist))
;; 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.
+ ;; 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
;; 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)))
+ ;; prefixes.
+ (push entry gnus-cite-prefix-alist))
(t
- (setq gnus-cite-prefix-alist (cons entry gnus-cite-prefix-alist))
+ (push 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))))))))
+ (setcdr current
+ (gnus-set-difference (cdr current) numbers)))))))))
+
+(defun gnus-cite-parse-attributions ()
+ (let (al-alist)
+ ;; Parse attributions
+ (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)
+ (when (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)))))))
+ (when (eq wrote in)
+ (setq in nil))
+ (goto-char end)
+ ;; don't add duplicates
+ (let ((al (buffer-substring (save-excursion (beginning-of-line 0)
+ (1+ (point)))
+ end)))
+ (when (not (assoc al al-alist))
+ (push (list wrote in prefix tag)
+ gnus-cite-loose-attribution-alist)
+ (push (cons al t) al-alist)))))))
+
+(defun gnus-cite-connect-attributions ()
+ ;; Connect attributions to citations
+
;; 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")
- (while (re-search-forward gnus-cite-attribution-postfix (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-postfix
- 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) ">"))))
+ (when 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) "\\>"))))
+ (when 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) "\\>"))))
+ (when tag
+ (concat "\\<"
+ (regexp-quote tag)
+ "\\>"))))
;; Find nested citations after attributions.
(gnus-cite-match-attributions 'small-if-unique t
(lambda (prefix tag)
(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)))))
+ (when (< (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?).
;; loose attribution lines, otherwise the first prefix will be used.
;;
;; If AFTER is non-nil, only citations after the attribution line
- ;; will be concidered.
+ ;; 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
- ;; concidered.
- ;;
+ ;; considered.
+ ;;
;; WROTE is the attribution line number.
;; PREFIX is the attribution line prefix.
- ;; TAG is the SuperCite tag on the attribution line.
+ ;; 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)
((eq sort 'first) nil)
(t (< (length (gnus-cite-find-loose prefix)) 2)))
limit (if after wrote -1)
- smallest 1000000
+ smallest 1000000
best nil)
(let ((cites gnus-cite-loose-prefix-alist)
cite candidate numbers first compare)
()
(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)))))))))))
+ (push (cons wrote (car best)) gnus-cite-attribution-alist)
+ (when in
+ (push (cons in (car best)) gnus-cite-attribution-alist))
+ (when (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))
+ (when (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.
(setq att (car atts)
line (car att)
atts (cdr atts))
- (if (string-equal (gnus-cite-find-prefix line) prefix)
- (setq lines (cons line lines))))
+ (when (string-equal (gnus-cite-find-prefix line) prefix)
+ (push 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.
- (if face
- (let ((inhibit-point-motion-hooks t)
- from to)
- (goto-line number)
+ (when face
+ (let ((inhibit-point-motion-hooks t)
+ from to overlay)
+ (goto-char (point-min))
+ (when (zerop (forward-line (1- number)))
(forward-char (length prefix))
(skip-chars-forward " \t")
(setq from (point))
(end-of-line 1)
(skip-chars-backward " \t")
(setq to (point))
- (if (< from to)
- (gnus-overlay-put (gnus-make-overlay from to) 'face face)))))
+ (when (< from to)
+ (push (setq overlay (gnus-make-overlay from to nil t))
+ gnus-cite-overlay-list)
+ (gnus-overlay-put overlay 'evaporate t)
+ (gnus-overlay-put overlay 'face face))))))
(defun gnus-cite-toggle (prefix)
- (save-excursion
- (set-buffer gnus-article-buffer)
+ (with-current-buffer gnus-article-buffer
+ (gnus-cite-parse-maybe nil t)
(let ((buffer-read-only nil)
(numbers (cdr (assoc prefix gnus-cite-prefix-alist)))
(inhibit-point-motion-hooks t)
(while numbers
(setq number (car numbers)
numbers (cdr numbers))
- (goto-line number)
+ (goto-char (point-min))
+ (forward-line (1- number))
(cond ((get-text-property (point) 'invisible)
+ ;; Can't remove 'cite from g-a-wash-types here because
+ ;; multiple citations may be hidden -jas
(remove-text-properties (point) (progn (forward-line 1) (point))
gnus-hidden-properties))
((assq number gnus-cite-attribution-alist))
(t
- (add-text-properties (point) (progn (forward-line 1) (point))
- gnus-hidden-properties)))))))
+ (gnus-add-wash-type 'cite)
+ (gnus-add-text-properties
+ (point) (progn (forward-line 1) (point))
+ (nconc (list 'article-type 'cite)
+ gnus-hidden-properties))))
+ (let ((gnus-article-mime-handle-alist-1
+ gnus-article-mime-handle-alist))
+ (gnus-set-mode-line 'article))))))
(defun gnus-cite-find-prefix (line)
;; Return citation prefix for LINE.
(while alist
(setq entry (car alist)
alist (cdr alist))
- (if (memq line (cdr entry))
- (setq prefix (car entry))))
+ (when (memq line (cdr entry))
+ (setq prefix (car entry))))
prefix))
+(defun gnus-cite-localize ()
+ "Make the citation variables local to the article buffer."
+ (let ((vars '(gnus-cite-article
+ gnus-cite-overlay-list gnus-cite-prefix-alist
+ gnus-cite-attribution-alist gnus-cite-loose-prefix-alist
+ gnus-cite-loose-attribution-alist)))
+ (while vars
+ (make-local-variable (pop vars)))))
+
+;; Highlighting of different citation levels in message-mode.
+;; - message-cite-prefix will be overridden if this is enabled.
+
+(defvar gnus-message-max-citation-depth
+ (length gnus-cite-face-list)
+ "Maximum supported level of citation.")
+
+(defvar gnus-message-cite-prefix-regexp
+ (concat "^\\(?:" message-cite-prefix-regexp "\\)"))
+
+(defun gnus-message-search-citation-line (limit)
+ "Search for a cited line and set match data accordingly.
+Returns nil if there is no such line before LIMIT, t otherwise."
+ (when (re-search-forward gnus-message-cite-prefix-regexp limit t)
+ (let ((cdepth (min (length (apply 'concat
+ (split-string
+ (match-string-no-properties 0)
+ "[ \t [:alnum:]]+")))
+ gnus-message-max-citation-depth))
+ (mlist (make-list (* (1+ gnus-message-max-citation-depth) 2) nil))
+ (start (point-at-bol))
+ (end (point-at-eol)))
+ (setcar mlist start)
+ (setcar (cdr mlist) end)
+ (setcar (nthcdr (* cdepth 2) mlist) start)
+ (setcar (nthcdr (1+ (* cdepth 2)) mlist) end)
+ (set-match-data mlist))
+ t))
+
+(defvar gnus-message-citation-keywords
+ ;; eval-when-compile ;; This breaks in XEmacs
+ `((gnus-message-search-citation-line
+ ,@(let ((list nil)
+ (count 1))
+ ;; (require 'gnus-cite)
+ (dolist (face gnus-cite-face-list (nreverse list))
+ (push (list count (list 'quote face) 'prepend t) list)
+ (setq count (1+ count)))))) ;;
+ "Keywords for highlighting different levels of message citations.")
+
+(defvar font-lock-defaults-computed)
+(defvar font-lock-keywords)
+(defvar font-lock-set-defaults)
+
+(eval-and-compile
+ (unless (featurep 'xemacs)
+ (autoload 'font-lock-set-defaults "font-lock")))
+
+(define-minor-mode gnus-message-citation-mode
+ "Minor mode providing more font-lock support for nested citations.
+When enabled, it automatically turns on `font-lock-mode'."
+ nil ;; init-value
+ "" ;; lighter
+ nil ;; keymap
+ (when (eq major-mode 'message-mode)
+ (let ((defaults (car (if (featurep 'xemacs)
+ (get 'message-mode 'font-lock-defaults)
+ font-lock-defaults)))
+ default keywords)
+ (while defaults
+ (setq default (if (consp defaults)
+ (pop defaults)
+ (prog1
+ defaults
+ (setq defaults nil))))
+ (if gnus-message-citation-mode
+ ;; `gnus-message-citation-keywords' should be the last
+ ;; elements of the keywords because the others are unlikely
+ ;; to have the OVERRIDE flags -- XEmacs applies a keyword
+ ;; having no OVERRIDE flag to matched text even if it has
+ ;; already other faces, while Emacs doesn't.
+ (set (make-local-variable default)
+ (append (default-value default)
+ gnus-message-citation-keywords))
+ (kill-local-variable default))))
+ ;; Force `font-lock-set-defaults' to update `font-lock-keywords'.
+ (if (featurep 'xemacs)
+ (progn
+ (require 'font-lock)
+ (setq font-lock-defaults-computed nil
+ font-lock-keywords nil))
+ (setq font-lock-set-defaults nil))
+ (font-lock-set-defaults)
+ (cond ((symbol-value 'font-lock-mode)
+ (font-lock-fontify-buffer))
+ (gnus-message-citation-mode
+ (font-lock-mode 1)))))
+
+(defun turn-on-gnus-message-citation-mode ()
+ "Turn on `gnus-message-citation-mode'."
+ (gnus-message-citation-mode 1))
+(defun turn-off-gnus-message-citation-mode ()
+ "Turn off `gnus-message-citation-mode'."
+ (gnus-message-citation-mode -1))
+
(gnus-ems-redefine)
(provide 'gnus-cite)
+;; Local Variables:
+;; coding: utf-8
+;; End:
+
;;; gnus-cite.el ends here
projects / gnus / blobdiff