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093f5d0045
* gnus-cite.el (gnus-message-citation-mode): Fontify if the major mode is derived from message-mode (not necessarily equal to message-mode) (bug#25124).
1207 lines
39 KiB
EmacsLisp
1207 lines
39 KiB
EmacsLisp
;;; gnus-cite.el --- parse citations in articles for Gnus
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;; Copyright (C) 1995-2019 Free Software Foundation, Inc.
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;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
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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 3 of the License, or
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;; (at your option) 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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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'gnus)
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(require 'gnus-range)
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(require 'gnus-art)
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(require 'message) ; for message-cite-prefix-regexp
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;;; Customization:
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(defgroup gnus-cite nil
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"Citation."
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:prefix "gnus-cite-"
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:link '(custom-manual "(gnus)Article Highlighting")
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:group 'gnus-article)
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(defcustom gnus-cited-opened-text-button-line-format "%(%{[-]%}%)\n"
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"Format of opened cited text buttons."
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:group 'gnus-cite
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:type 'string)
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(defcustom gnus-cited-closed-text-button-line-format "%(%{[+]%}%)\n"
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"Format of closed cited text buttons."
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:group 'gnus-cite
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:type 'string)
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(defcustom gnus-cited-lines-visible nil
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"The number of lines of hidden cited text to remain visible.
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Or a pair (cons) of numbers which are the number of lines at the top
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and bottom of the text, respectively, to remain visible."
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:group 'gnus-cite
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:type '(choice (const :tag "none" nil)
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integer
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(cons :tag "Top and Bottom" integer integer)))
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(defcustom 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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:group 'gnus-cite
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:type '(choice (const :tag "all" nil)
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integer))
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(defcustom gnus-cite-max-prefix 20
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"Maximum possible length for a citation prefix."
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:group 'gnus-cite
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:type 'integer)
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(defcustom gnus-supercite-regexp
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(concat "^\\(" message-cite-prefix-regexp "\\)? *"
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">>>>> +\"\\([^\"\n]+\\)\" +==")
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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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:group 'gnus-cite
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:type 'regexp)
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(defcustom 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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:group 'gnus-cite
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:type 'regexp)
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(defcustom 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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:group 'gnus-cite
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:type 'integer)
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;; Some Microsoft products put in a citation that extends to the
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;; remainder of the message:
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;;
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;; -----Original Message-----
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;; From: ...
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;; To: ...
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;; Sent: ... [date, in non-RFC-822-or-later format]
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;; Subject: ...
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;;
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;; Cited message, with no prefixes
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;;
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;; The four headers are always the same. But note they are prone to
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;; folding without additional indentation.
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;;
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;; Others use "----- Original Message -----" instead, and properly quote
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;; the body using "> ". This style is handled without special cases.
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(defcustom gnus-cite-attribution-prefix
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"In article\\|in <\\|On \\(Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\|Sun\\),\\|----- ?Original Message ?-----"
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"Regexp matching the beginning of an attribution line."
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:group 'gnus-cite
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:type 'regexp)
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(defcustom gnus-cite-attribution-suffix
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"\\(\\(wrote\\|writes\\|said\\|says\\|>\\)\\(:\\|\\.\\.\\.\\)\\|----- ?Original Message ?-----\\)[ \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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:group 'gnus-cite
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:type 'regexp)
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(defcustom gnus-cite-unsightly-citation-regexp
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"^-----Original Message-----\nFrom: \\(.+\n\\)+\n"
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"Regexp matching Microsoft-type rest-of-message citations."
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:version "22.1"
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:group 'gnus-cite
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:type 'regexp)
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(defcustom gnus-cite-ignore-quoted-from t
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"Non-nil means don't regard lines beginning with \">From \" as cited text.
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Those lines may have been quoted by MTAs in order not to mix up with
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the envelope From line."
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:version "22.1"
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:group 'gnus-cite
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:type 'boolean)
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(defface gnus-cite-attribution '((t (:italic t)))
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"Face used for attribution lines."
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:group 'gnus-cite)
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(defcustom gnus-cite-attribution-face 'gnus-cite-attribution
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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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:version "22.1"
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:group 'gnus-cite
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:type 'face)
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(defface gnus-cite-1 '((((class color)
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(background dark))
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(:foreground "light blue"))
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(((class color)
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(background light))
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(:foreground "MidnightBlue"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-2 '((((class color)
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(background dark))
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(:foreground "light cyan"))
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(((class color)
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(background light))
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(:foreground "firebrick"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-3 '((((class color)
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(background dark))
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(:foreground "light yellow"))
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(((class color)
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(background light))
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(:foreground "dark green"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-4 '((((class color)
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(background dark))
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(:foreground "light pink"))
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(((class color)
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(background light))
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(:foreground "OrangeRed"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-5 '((((class color)
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(background dark))
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(:foreground "pale green"))
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(((class color)
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(background light))
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(:foreground "dark khaki"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-6 '((((class color)
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(background dark))
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(:foreground "beige"))
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(((class color)
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(background light))
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(:foreground "dark violet"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-7 '((((class color)
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(background dark))
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(:foreground "orange"))
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(((class color)
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(background light))
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(:foreground "SteelBlue4"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-8 '((((class color)
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(background dark))
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(:foreground "magenta"))
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(((class color)
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(background light))
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(:foreground "magenta"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-9 '((((class color)
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(background dark))
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(:foreground "violet"))
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(((class color)
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(background light))
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(:foreground "violet"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-10 '((((class color)
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(background dark))
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(:foreground "plum1"))
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(((class color)
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(background light))
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(:foreground "medium purple"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defface gnus-cite-11 '((((class color)
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(background dark))
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(:foreground "turquoise"))
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(((class color)
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(background light))
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(:foreground "turquoise"))
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(t
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(:italic t)))
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"Citation face."
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:group 'gnus-cite)
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(defcustom gnus-cite-face-list
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'(gnus-cite-1 gnus-cite-2 gnus-cite-3 gnus-cite-4 gnus-cite-5 gnus-cite-6
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gnus-cite-7 gnus-cite-8 gnus-cite-9 gnus-cite-10 gnus-cite-11)
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"List of faces used for highlighting citations.
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When there are citations from multiple articles in the same message,
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Gnus will try to give each citation from each article its own face.
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This should make it easier to see who wrote what."
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:group 'gnus-cite
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:type '(repeat face)
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:set (lambda (symbol value)
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(prog1
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(custom-set-default symbol value)
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(if (boundp 'gnus-message-max-citation-depth)
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(setq gnus-message-max-citation-depth (length value)))
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(if (boundp 'gnus-message-citation-keywords)
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(setq gnus-message-citation-keywords
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`((gnus-message-search-citation-line
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,@(let ((list nil)
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(count 1))
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(dolist (face value (nreverse list))
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(push (list count (list 'quote face) 'prepend t)
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list)
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(setq count (1+ count)))))))))))
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(defcustom gnus-cite-hide-percentage 50
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"Only hide excess citation if above this percentage of the body."
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:group 'gnus-cite
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:type 'number)
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(defcustom gnus-cite-hide-absolute 10
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"Only hide excess citation if above this number of lines in the body."
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:group 'gnus-cite
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:type 'integer)
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(defcustom gnus-cite-blank-line-after-header t
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"If non-nil, put a blank line between the citation header and the button."
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:group 'gnus-cite
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:type 'boolean)
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;; This has to go here because its default value depends on
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;; gnus-cite-face-list.
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(defcustom gnus-article-boring-faces (cons 'gnus-signature gnus-cite-face-list)
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"List of faces that are not worth reading.
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If an article has more pages below the one you are looking at, but
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nothing on those pages is a word of at least three letters that is not
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in a boring face, then the pages will be skipped."
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:type '(repeat face)
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:group 'gnus-article-hiding)
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;;; Internal Variables:
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(defvar gnus-cite-article nil)
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(defvar gnus-cite-overlay-list nil)
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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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;; TAG: Is a Supercite tag, if any.
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(defvar gnus-cited-opened-text-button-line-format-alist
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'((?b (marker-position beg) ?d)
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(?e (marker-position end) ?d)
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(?n (count-lines beg end) ?d)
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(?l (- end beg) ?d)))
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(defvar gnus-cited-opened-text-button-line-format-spec nil)
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(defvar gnus-cited-closed-text-button-line-format-alist
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gnus-cited-opened-text-button-line-format-alist)
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(defvar gnus-cited-closed-text-button-line-format-spec nil)
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;;; Commands:
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(defun gnus-article-highlight-citation (&optional force same-buffer)
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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 the face `gnus-cite-attribution'.
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Text is considered cited if at least `gnus-cite-minimum-match-count'
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lines matches `message-cite-prefix-regexp' with the same prefix.
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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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(with-current-buffer (if same-buffer (current-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-char (point-min))
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(forward-line (1- number))
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(when (re-search-forward gnus-cite-attribution-suffix
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(point-at-eol)
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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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(defun gnus-dissect-cited-text ()
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"Dissect the article buffer looking for cited text."
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(with-current-buffer gnus-article-buffer
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(gnus-cite-parse-maybe nil t)
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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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;; Skip to the beginning of the body.
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(article-goto-body)
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(push (cons (point-marker) "") marks)
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;; Find the end of the body.
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(goto-char (point-max))
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(gnus-article-search-signature)
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(push (cons (point-marker) "") marks)
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;; Sort the marks.
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(setq marks (sort marks 'car-less-than-car))
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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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(unless (and (equal (cdar omarks) "")
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(equal (cdadr omarks) "")
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(not (cddr omarks)))
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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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(looking-at "[ \t]*$")
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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-long-lines ()
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(gnus-article-fill-cited-article nil t))
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(defun gnus-article-fill-cited-article (&optional width long-lines)
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"Do word wrapping in the current article.
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If WIDTH (the numerical prefix), use that text width when
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filling.
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If LONG-LINES, only fill sections that have lines longer than the
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frame width.
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Sections that are heuristically interpreted as not being
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text (i.e., computer code and the like) will not be folded."
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|
(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)
|
|
(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))))
|
|
(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-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 (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 (&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-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 (overlay-end overlay))
|
|
(and (>= (overlay-end overlay) (point-min))
|
|
(<= (overlay-end overlay) (point-max))))
|
|
(setq gnus-cite-overlay-list (delete overlay gnus-cite-overlay-list))
|
|
(ignore-errors
|
|
(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.
|
|
|
|
;; Parse current buffer searching for citation prefixes.
|
|
(let ((line (1+ (count-lines (point-min) (point))))
|
|
(case-fold-search t)
|
|
(max (save-excursion
|
|
(goto-char (point-max))
|
|
(gnus-article-search-signature)
|
|
(point)))
|
|
(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)
|
|
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.
|
|
(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.
|
|
(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
|
|
(setcdr entry (cons line (cdr entry)))
|
|
(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.
|
|
(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.
|
|
(push entry gnus-cite-prefix-alist))
|
|
(t
|
|
(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)))))))))
|
|
|
|
(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.
|
|
;; Find exact supercite citations.
|
|
(gnus-cite-match-attributions 'small nil
|
|
(lambda (prefix 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)
|
|
(when tag
|
|
(concat "\\<"
|
|
(regexp-quote tag)
|
|
"\\>"))))
|
|
;; Find loose supercite citations anywhere.
|
|
(gnus-cite-match-attributions 'small nil
|
|
(lambda (prefix tag)
|
|
(when 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))
|
|
(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?).
|
|
(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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;; will be considered.
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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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;; considered.
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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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;; TAG is the Supercite tag on the attribution line.
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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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(push (cons wrote (car best)) gnus-cite-attribution-alist)
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(when in
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(push (cons in (car best)) gnus-cite-attribution-alist))
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(when (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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(when (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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(when (string-equal (gnus-cite-find-prefix line) prefix)
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(push 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.
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(when face
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(let ((inhibit-point-motion-hooks t)
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|
from to overlay)
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(goto-char (point-min))
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(when (zerop (forward-line (1- number)))
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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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|
(when (< from to)
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|
(push (setq overlay (make-overlay from to nil t))
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|
gnus-cite-overlay-list)
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|
(overlay-put overlay 'evaporate t)
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|
(overlay-put overlay 'face face))))))
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|
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(defun gnus-cite-toggle (prefix)
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(with-current-buffer gnus-article-buffer
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(gnus-cite-parse-maybe nil t)
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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-char (point-min))
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|
(forward-line (1- number))
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|
(cond ((get-text-property (point) 'invisible)
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|
;; Can't remove 'cite from g-a-wash-types here because
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|
;; multiple citations may be hidden -jas
|
|
(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
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|
(gnus-add-wash-type 'cite)
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|
(add-text-properties
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|
(point) (progn (forward-line 1) (point))
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|
(nconc (list 'article-type 'cite)
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|
gnus-hidden-properties))))
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|
(let ((gnus-article-mime-handle-alist-1
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|
gnus-article-mime-handle-alist))
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|
(gnus-set-mode-line 'article))))))
|
|
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(defun gnus-cite-find-prefix (line)
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|
;; Return citation prefix for LINE.
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|
(let ((alist gnus-cite-prefix-alist)
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|
(prefix "")
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|
entry)
|
|
(while alist
|
|
(setq entry (car alist)
|
|
alist (cdr alist))
|
|
(when (memq line (cdr entry))
|
|
(setq prefix (car entry))))
|
|
prefix))
|
|
|
|
(defun gnus-cite-localize ()
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|
"Make the citation variables local to the article buffer."
|
|
(let ((vars '(gnus-cite-article
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|
gnus-cite-overlay-list gnus-cite-prefix-alist
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|
gnus-cite-attribution-alist gnus-cite-loose-prefix-alist
|
|
gnus-cite-loose-attribution-alist)))
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|
(while vars
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|
(make-local-variable (pop vars)))))
|
|
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|
;; Highlighting of different citation levels in message-mode.
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|
;; - message-cite-prefix will be overridden if this is enabled.
|
|
|
|
(defvar gnus-message-max-citation-depth
|
|
(length gnus-cite-face-list)
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|
"Maximum supported level of citation.")
|
|
|
|
(defvar gnus-message-cite-prefix-regexp
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|
(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))
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|
(mlist (make-list (* (1+ gnus-message-max-citation-depth) 2) nil))
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|
(start (point-at-bol))
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|
(end (point-at-eol)))
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|
(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)
|
|
|
|
(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 (derived-mode-p 'message-mode)
|
|
;; FIXME: Use font-lock-add-keywords!
|
|
(let ((defaults (car 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'.
|
|
(setq font-lock-set-defaults nil)
|
|
(font-lock-set-defaults)
|
|
(if font-lock-mode
|
|
(font-lock-flush)
|
|
(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))
|
|
|
|
(provide 'gnus-cite)
|
|
|
|
;; Local Variables:
|
|
;; coding: utf-8
|
|
;; End:
|
|
|
|
;;; gnus-cite.el ends here
|