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23f87bed | 1 | ;;; gnus-cite.el --- parse citations in articles for Gnus |
eec82323 | 2 | |
e84b4b86 | 3 | ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
d7a0267c | 4 | ;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
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5 | |
6 | ;; Author: Per Abhiddenware | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
eec82323 | 11 | ;; it under the terms of the GNU General Public License as published by |
5a9dffec | 12 | ;; the Free Software Foundation; either version 3, or (at your option) |
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13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
3a35cf56 LK |
22 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
23 | ;; Boston, MA 02110-1301, USA. | |
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24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;;; Code: | |
28 | ||
5ab7173c | 29 | (eval-when-compile (require 'cl)) |
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30 | (eval-when-compile |
31 | (when (featurep 'xemacs) | |
32 | (require 'easy-mmode))) ; for `define-minor-mode' | |
5ab7173c | 33 | |
eec82323 | 34 | (require 'gnus) |
eec82323 | 35 | (require 'gnus-range) |
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36 | (require 'gnus-art) |
37 | (require 'message) ; for message-cite-prefix-regexp | |
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38 | |
39 | ;;; Customization: | |
40 | ||
41 | (defgroup gnus-cite nil | |
42 | "Citation." | |
43 | :prefix "gnus-cite-" | |
44 | :link '(custom-manual "(gnus)Article Highlighting") | |
45 | :group 'gnus-article) | |
46 | ||
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47 | (defcustom gnus-cited-opened-text-button-line-format "%(%{[-]%}%)\n" |
48 | "Format of opened cited text buttons." | |
49 | :group 'gnus-cite | |
50 | :type 'string) | |
51 | ||
52 | (defcustom gnus-cited-closed-text-button-line-format "%(%{[+]%}%)\n" | |
53 | "Format of closed cited text buttons." | |
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54 | :group 'gnus-cite |
55 | :type 'string) | |
56 | ||
57 | (defcustom gnus-cited-lines-visible nil | |
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58 | "The number of lines of hidden cited text to remain visible. |
59 | Or a pair (cons) of numbers which are the number of lines at the top | |
60 | and bottom of the text, respectively, to remain visible." | |
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61 | :group 'gnus-cite |
62 | :type '(choice (const :tag "none" nil) | |
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63 | integer |
64 | (cons :tag "Top and Bottom" integer integer))) | |
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65 | |
66 | (defcustom gnus-cite-parse-max-size 25000 | |
67 | "Maximum article size (in bytes) where parsing citations is allowed. | |
68 | Set it to nil to parse all articles." | |
69 | :group 'gnus-cite | |
70 | :type '(choice (const :tag "all" nil) | |
71 | integer)) | |
72 | ||
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73 | (defcustom gnus-cite-max-prefix 20 |
74 | "Maximum possible length for a citation prefix." | |
75 | :group 'gnus-cite | |
76 | :type 'integer) | |
77 | ||
78 | (defcustom gnus-supercite-regexp | |
23f87bed | 79 | (concat "^\\(" message-cite-prefix-regexp "\\)? *" |
eec82323 | 80 | ">>>>> +\"\\([^\"\n]+\\)\" +==") |
6748645f | 81 | "*Regexp matching normal Supercite attribution lines. |
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82 | The first grouping must match prefixes added by other packages." |
83 | :group 'gnus-cite | |
84 | :type 'regexp) | |
85 | ||
86 | (defcustom gnus-supercite-secondary-regexp "^.*\"\\([^\"\n]+\\)\" +==" | |
87 | "Regexp matching mangled Supercite attribution lines. | |
88 | The first regexp group should match the Supercite attribution." | |
89 | :group 'gnus-cite | |
90 | :type 'regexp) | |
91 | ||
92 | (defcustom gnus-cite-minimum-match-count 2 | |
93 | "Minimum number of identical prefixes before we believe it's a citation." | |
94 | :group 'gnus-cite | |
95 | :type 'integer) | |
96 | ||
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97 | ;; Some Microsoft products put in a citation that extends to the |
98 | ;; remainder of the message: | |
99 | ;; | |
100 | ;; -----Original Message----- | |
101 | ;; From: ... | |
102 | ;; To: ... | |
103 | ;; Sent: ... [date, in non-RFC-2822 format] | |
104 | ;; Subject: ... | |
105 | ;; | |
106 | ;; Cited message, with no prefixes | |
107 | ;; | |
108 | ;; The four headers are always the same. But note they are prone to | |
109 | ;; folding without additional indentation. | |
110 | ;; | |
111 | ;; Others use "----- Original Message -----" instead, and properly quote | |
112 | ;; the body using "> ". This style is handled without special cases. | |
113 | ||
6748645f | 114 | (defcustom gnus-cite-attribution-prefix |
23f87bed | 115 | "In article\\|in <\\|On \\(Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\|Sun\\),\\|----- ?Original Message ?-----" |
6748645f | 116 | "*Regexp matching the beginning of an attribution line." |
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117 | :group 'gnus-cite |
118 | :type 'regexp) | |
119 | ||
120 | (defcustom gnus-cite-attribution-suffix | |
23f87bed | 121 | "\\(\\(wrote\\|writes\\|said\\|says\\|>\\)\\(:\\|\\.\\.\\.\\)\\|----- ?Original Message ?-----\\)[ \t]*$" |
6748645f | 122 | "*Regexp matching the end of an attribution line. |
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123 | The text matching the first grouping will be used as a button." |
124 | :group 'gnus-cite | |
125 | :type 'regexp) | |
126 | ||
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127 | (defcustom gnus-cite-unsightly-citation-regexp |
128 | "^-----Original Message-----\nFrom: \\(.+\n\\)+\n" | |
129 | "Regexp matching Microsoft-type rest-of-message citations." | |
bf247b6e | 130 | :version "22.1" |
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131 | :group 'gnus-cite |
132 | :type 'regexp) | |
133 | ||
134 | (defcustom gnus-cite-ignore-quoted-from t | |
135 | "Non-nil means don't regard lines beginning with \">From \" as cited text. | |
136 | Those lines may have been quoted by MTAs in order not to mix up with | |
137 | the envelope From line." | |
bf247b6e | 138 | :version "22.1" |
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139 | :group 'gnus-cite |
140 | :type 'boolean) | |
141 | ||
0f49874b | 142 | (defface gnus-cite-attribution '((t (:italic t))) |
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143 | "Face used for attribution lines." |
144 | :group 'gnus-cite) | |
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145 | ;; backward-compatibility alias |
146 | (put 'gnus-cite-attribution-face 'face-alias 'gnus-cite-attribution) | |
eec82323 | 147 | |
0f49874b | 148 | (defcustom gnus-cite-attribution-face 'gnus-cite-attribution |
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149 | "Face used for attribution lines. |
150 | It is merged with the face for the cited text belonging to the attribution." | |
bf247b6e | 151 | :version "22.1" |
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152 | :group 'gnus-cite |
153 | :type 'face) | |
154 | ||
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155 | (defface gnus-cite-1 '((((class color) |
156 | (background dark)) | |
157 | (:foreground "light blue")) | |
158 | (((class color) | |
159 | (background light)) | |
160 | (:foreground "MidnightBlue")) | |
161 | (t | |
162 | (:italic t))) | |
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163 | "Citation face." |
164 | :group 'gnus-cite) | |
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165 | ;; backward-compatibility alias |
166 | (put 'gnus-cite-face-1 'face-alias 'gnus-cite-1) | |
167 | ||
168 | (defface gnus-cite-2 '((((class color) | |
169 | (background dark)) | |
170 | (:foreground "light cyan")) | |
171 | (((class color) | |
172 | (background light)) | |
173 | (:foreground "firebrick")) | |
174 | (t | |
175 | (:italic t))) | |
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176 | "Citation face." |
177 | :group 'gnus-cite) | |
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178 | ;; backward-compatibility alias |
179 | (put 'gnus-cite-face-2 'face-alias 'gnus-cite-2) | |
180 | ||
181 | (defface gnus-cite-3 '((((class color) | |
182 | (background dark)) | |
183 | (:foreground "light yellow")) | |
184 | (((class color) | |
185 | (background light)) | |
186 | (:foreground "dark green")) | |
187 | (t | |
188 | (:italic t))) | |
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189 | "Citation face." |
190 | :group 'gnus-cite) | |
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191 | ;; backward-compatibility alias |
192 | (put 'gnus-cite-face-3 'face-alias 'gnus-cite-3) | |
193 | ||
194 | (defface gnus-cite-4 '((((class color) | |
195 | (background dark)) | |
196 | (:foreground "light pink")) | |
197 | (((class color) | |
198 | (background light)) | |
199 | (:foreground "OrangeRed")) | |
200 | (t | |
201 | (:italic t))) | |
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202 | "Citation face." |
203 | :group 'gnus-cite) | |
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204 | ;; backward-compatibility alias |
205 | (put 'gnus-cite-face-4 'face-alias 'gnus-cite-4) | |
206 | ||
207 | (defface gnus-cite-5 '((((class color) | |
208 | (background dark)) | |
209 | (:foreground "pale green")) | |
210 | (((class color) | |
211 | (background light)) | |
212 | (:foreground "dark khaki")) | |
213 | (t | |
214 | (:italic t))) | |
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215 | "Citation face." |
216 | :group 'gnus-cite) | |
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217 | ;; backward-compatibility alias |
218 | (put 'gnus-cite-face-5 'face-alias 'gnus-cite-5) | |
219 | ||
220 | (defface gnus-cite-6 '((((class color) | |
221 | (background dark)) | |
222 | (:foreground "beige")) | |
223 | (((class color) | |
224 | (background light)) | |
225 | (:foreground "dark violet")) | |
226 | (t | |
227 | (:italic t))) | |
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228 | "Citation face." |
229 | :group 'gnus-cite) | |
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230 | ;; backward-compatibility alias |
231 | (put 'gnus-cite-face-6 'face-alias 'gnus-cite-6) | |
232 | ||
233 | (defface gnus-cite-7 '((((class color) | |
234 | (background dark)) | |
235 | (:foreground "orange")) | |
236 | (((class color) | |
237 | (background light)) | |
238 | (:foreground "SteelBlue4")) | |
239 | (t | |
240 | (:italic t))) | |
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241 | "Citation face." |
242 | :group 'gnus-cite) | |
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243 | ;; backward-compatibility alias |
244 | (put 'gnus-cite-face-7 'face-alias 'gnus-cite-7) | |
245 | ||
246 | (defface gnus-cite-8 '((((class color) | |
247 | (background dark)) | |
248 | (:foreground "magenta")) | |
249 | (((class color) | |
250 | (background light)) | |
251 | (:foreground "magenta")) | |
252 | (t | |
253 | (:italic t))) | |
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254 | "Citation face." |
255 | :group 'gnus-cite) | |
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256 | ;; backward-compatibility alias |
257 | (put 'gnus-cite-face-8 'face-alias 'gnus-cite-8) | |
258 | ||
259 | (defface gnus-cite-9 '((((class color) | |
260 | (background dark)) | |
261 | (:foreground "violet")) | |
262 | (((class color) | |
263 | (background light)) | |
264 | (:foreground "violet")) | |
265 | (t | |
266 | (:italic t))) | |
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267 | "Citation face." |
268 | :group 'gnus-cite) | |
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269 | ;; backward-compatibility alias |
270 | (put 'gnus-cite-face-9 'face-alias 'gnus-cite-9) | |
271 | ||
272 | (defface gnus-cite-10 '((((class color) | |
273 | (background dark)) | |
01c52d31 | 274 | (:foreground "plum1")) |
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275 | (((class color) |
276 | (background light)) | |
277 | (:foreground "medium purple")) | |
278 | (t | |
279 | (:italic t))) | |
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280 | "Citation face." |
281 | :group 'gnus-cite) | |
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282 | ;; backward-compatibility alias |
283 | (put 'gnus-cite-face-10 'face-alias 'gnus-cite-10) | |
284 | ||
285 | (defface gnus-cite-11 '((((class color) | |
286 | (background dark)) | |
287 | (:foreground "turquoise")) | |
288 | (((class color) | |
289 | (background light)) | |
290 | (:foreground "turquoise")) | |
291 | (t | |
292 | (:italic t))) | |
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293 | "Citation face." |
294 | :group 'gnus-cite) | |
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295 | ;; backward-compatibility alias |
296 | (put 'gnus-cite-face-11 'face-alias 'gnus-cite-11) | |
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297 | |
298 | (defcustom gnus-cite-face-list | |
0f49874b | 299 | '(gnus-cite-1 gnus-cite-2 gnus-cite-3 gnus-cite-4 gnus-cite-5 gnus-cite-6 |
01c52d31 | 300 | gnus-cite-7 gnus-cite-8 gnus-cite-9 gnus-cite-10 gnus-cite-11) |
6748645f | 301 | "*List of faces used for highlighting citations. |
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302 | |
303 | When there are citations from multiple articles in the same message, | |
304 | Gnus will try to give each citation from each article its own face. | |
305 | This should make it easier to see who wrote what." | |
306 | :group 'gnus-cite | |
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307 | :type '(repeat face) |
308 | :set (lambda (symbol value) | |
309 | (prog1 | |
310 | (custom-set-default symbol value) | |
311 | (if (boundp 'gnus-message-max-citation-depth) | |
312 | (setq gnus-message-max-citation-depth (length value))) | |
313 | (if (boundp 'gnus-message-citation-keywords) | |
314 | (setq gnus-message-citation-keywords | |
315 | `((gnus-message-search-citation-line | |
316 | ,@(let ((list nil) | |
317 | (count 1)) | |
318 | (dolist (face value (nreverse list)) | |
319 | (push (list count (list 'quote face) 'prepend t) | |
320 | list) | |
321 | (setq count (1+ count))))))))))) | |
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322 | |
323 | (defcustom gnus-cite-hide-percentage 50 | |
324 | "Only hide excess citation if above this percentage of the body." | |
325 | :group 'gnus-cite | |
326 | :type 'number) | |
327 | ||
328 | (defcustom gnus-cite-hide-absolute 10 | |
329 | "Only hide excess citation if above this number of lines in the body." | |
330 | :group 'gnus-cite | |
331 | :type 'integer) | |
332 | ||
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333 | (defcustom gnus-cite-blank-line-after-header t |
334 | "If non-nil, put a blank line between the citation header and the button." | |
335 | :group 'gnus-cite | |
336 | :type 'boolean) | |
337 | ||
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338 | ;; This has to go here because its default value depends on |
339 | ;; gnus-cite-face-list. | |
0f49874b | 340 | (defcustom gnus-article-boring-faces (cons 'gnus-signature gnus-cite-face-list) |
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341 | "List of faces that are not worth reading. |
342 | If an article has more pages below the one you are looking at, but | |
343 | nothing on those pages is a word of at least three letters that is not | |
344 | in a boring face, then the pages will be skipped." | |
345 | :type '(repeat face) | |
346 | :group 'gnus-article-hiding) | |
347 | ||
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348 | ;;; Internal Variables: |
349 | ||
350 | (defvar gnus-cite-article nil) | |
6748645f | 351 | (defvar gnus-cite-overlay-list nil) |
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352 | |
353 | (defvar gnus-cite-prefix-alist nil) | |
354 | ;; Alist of citation prefixes. | |
355 | ;; The cdr is a list of lines with that prefix. | |
356 | ||
357 | (defvar gnus-cite-attribution-alist nil) | |
358 | ;; Alist of attribution lines. | |
359 | ;; The car is a line number. | |
360 | ;; The cdr is the prefix for the citation started by that line. | |
361 | ||
362 | (defvar gnus-cite-loose-prefix-alist nil) | |
363 | ;; Alist of citation prefixes that have no matching attribution. | |
364 | ;; The cdr is a list of lines with that prefix. | |
365 | ||
366 | (defvar gnus-cite-loose-attribution-alist nil) | |
367 | ;; Alist of attribution lines that have no matching citation. | |
368 | ;; Each member has the form (WROTE IN PREFIX TAG), where | |
369 | ;; WROTE: is the attribution line number | |
370 | ;; IN: is the line number of the previous line if part of the same attribution, | |
371 | ;; PREFIX: Is the citation prefix of the attribution line(s), and | |
372 | ;; TAG: Is a Supercite tag, if any. | |
373 | ||
6748645f | 374 | (defvar gnus-cited-opened-text-button-line-format-alist |
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375 | `((?b (marker-position beg) ?d) |
376 | (?e (marker-position end) ?d) | |
6748645f | 377 | (?n (count-lines beg end) ?d) |
eec82323 | 378 | (?l (- end beg) ?d))) |
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379 | (defvar gnus-cited-opened-text-button-line-format-spec nil) |
380 | (defvar gnus-cited-closed-text-button-line-format-alist | |
381 | gnus-cited-opened-text-button-line-format-alist) | |
382 | (defvar gnus-cited-closed-text-button-line-format-spec nil) | |
383 | ||
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384 | |
385 | ;;; Commands: | |
386 | ||
01c52d31 | 387 | (defun gnus-article-highlight-citation (&optional force same-buffer) |
eec82323 LMI |
388 | "Highlight cited text. |
389 | Each citation in the article will be highlighted with a different face. | |
390 | The faces are taken from `gnus-cite-face-list'. | |
391 | Attribution lines are highlighted with the same face as the | |
0f49874b | 392 | corresponding citation merged with the face `gnus-cite-attribution'. |
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393 | |
394 | Text is considered cited if at least `gnus-cite-minimum-match-count' | |
23f87bed | 395 | lines matches `message-cite-prefix-regexp' with the same prefix. |
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396 | |
397 | Lines matching `gnus-cite-attribution-suffix' and perhaps | |
398 | `gnus-cite-attribution-prefix' are considered attribution lines." | |
399 | (interactive (list 'force)) | |
400 | (save-excursion | |
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401 | (unless same-buffer |
402 | (set-buffer gnus-article-buffer)) | |
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403 | (gnus-cite-parse-maybe force) |
404 | (let ((buffer-read-only nil) | |
405 | (alist gnus-cite-prefix-alist) | |
406 | (faces gnus-cite-face-list) | |
407 | (inhibit-point-motion-hooks t) | |
408 | face entry prefix skip numbers number face-alist) | |
409 | ;; Loop through citation prefixes. | |
410 | (while alist | |
411 | (setq entry (car alist) | |
412 | alist (cdr alist) | |
413 | prefix (car entry) | |
414 | numbers (cdr entry) | |
415 | face (car faces) | |
416 | faces (or (cdr faces) gnus-cite-face-list) | |
417 | face-alist (cons (cons prefix face) face-alist)) | |
418 | (while numbers | |
419 | (setq number (car numbers) | |
420 | numbers (cdr numbers)) | |
421 | (and (not (assq number gnus-cite-attribution-alist)) | |
422 | (not (assq number gnus-cite-loose-attribution-alist)) | |
423 | (gnus-cite-add-face number prefix face)))) | |
424 | ;; Loop through attribution lines. | |
425 | (setq alist gnus-cite-attribution-alist) | |
426 | (while alist | |
427 | (setq entry (car alist) | |
428 | alist (cdr alist) | |
429 | number (car entry) | |
430 | prefix (cdr entry) | |
431 | skip (gnus-cite-find-prefix number) | |
432 | face (cdr (assoc prefix face-alist))) | |
433 | ;; Add attribution button. | |
16409b0b GM |
434 | (goto-char (point-min)) |
435 | (forward-line (1- number)) | |
eec82323 | 436 | (when (re-search-forward gnus-cite-attribution-suffix |
01c52d31 | 437 | (point-at-eol) |
eec82323 LMI |
438 | t) |
439 | (gnus-article-add-button (match-beginning 1) (match-end 1) | |
440 | 'gnus-cite-toggle prefix)) | |
441 | ;; Highlight attribution line. | |
442 | (gnus-cite-add-face number skip face) | |
443 | (gnus-cite-add-face number skip gnus-cite-attribution-face)) | |
444 | ;; Loop through attribution lines. | |
445 | (setq alist gnus-cite-loose-attribution-alist) | |
446 | (while alist | |
447 | (setq entry (car alist) | |
448 | alist (cdr alist) | |
449 | number (car entry) | |
450 | skip (gnus-cite-find-prefix number)) | |
451 | (gnus-cite-add-face number skip gnus-cite-attribution-face))))) | |
452 | ||
453 | (defun gnus-dissect-cited-text () | |
454 | "Dissect the article buffer looking for cited text." | |
455 | (save-excursion | |
456 | (set-buffer gnus-article-buffer) | |
16409b0b | 457 | (gnus-cite-parse-maybe nil t) |
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458 | (let ((alist gnus-cite-prefix-alist) |
459 | prefix numbers number marks m) | |
460 | ;; Loop through citation prefixes. | |
461 | (while alist | |
462 | (setq numbers (pop alist) | |
463 | prefix (pop numbers)) | |
464 | (while numbers | |
465 | (setq number (pop numbers)) | |
466 | (goto-char (point-min)) | |
467 | (forward-line number) | |
468 | (push (cons (point-marker) "") marks) | |
469 | (while (and numbers | |
470 | (= (1- number) (car numbers))) | |
471 | (setq number (pop numbers))) | |
472 | (goto-char (point-min)) | |
473 | (forward-line (1- number)) | |
474 | (push (cons (point-marker) prefix) marks))) | |
475 | ;; Skip to the beginning of the body. | |
16409b0b | 476 | (article-goto-body) |
eec82323 LMI |
477 | (push (cons (point-marker) "") marks) |
478 | ;; Find the end of the body. | |
479 | (goto-char (point-max)) | |
480 | (gnus-article-search-signature) | |
481 | (push (cons (point-marker) "") marks) | |
482 | ;; Sort the marks. | |
6748645f | 483 | (setq marks (sort marks 'car-less-than-car)) |
eec82323 LMI |
484 | (let ((omarks marks)) |
485 | (setq marks nil) | |
486 | (while (cdr omarks) | |
487 | (if (= (caar omarks) (caadr omarks)) | |
488 | (progn | |
489 | (unless (equal (cdar omarks) "") | |
490 | (push (car omarks) marks)) | |
491 | (unless (equal (cdadr omarks) "") | |
492 | (push (cadr omarks) marks)) | |
493 | (unless (and (equal (cdar omarks) "") | |
494 | (equal (cdadr omarks) "") | |
495 | (not (cddr omarks))) | |
496 | (setq omarks (cdr omarks)))) | |
497 | (push (car omarks) marks)) | |
498 | (setq omarks (cdr omarks))) | |
499 | (when (car omarks) | |
500 | (push (car omarks) marks)) | |
501 | (setq marks (setq m (nreverse marks))) | |
502 | (while (cddr m) | |
503 | (if (and (equal (cdadr m) "") | |
504 | (equal (cdar m) (cdaddr m)) | |
505 | (goto-char (caadr m)) | |
506 | (forward-line 1) | |
507 | (= (point) (caaddr m))) | |
508 | (setcdr m (cdddr m)) | |
509 | (setq m (cdr m)))) | |
510 | marks)))) | |
511 | ||
512 | (defun gnus-article-fill-cited-article (&optional force width) | |
513 | "Do word wrapping in the current article. | |
514 | If WIDTH (the numerical prefix), use that text width when filling." | |
515 | (interactive (list t current-prefix-arg)) | |
516 | (save-excursion | |
517 | (set-buffer gnus-article-buffer) | |
518 | (let ((buffer-read-only nil) | |
519 | (inhibit-point-motion-hooks t) | |
520 | (marks (gnus-dissect-cited-text)) | |
521 | (adaptive-fill-mode nil) | |
522 | (filladapt-mode nil) | |
523 | (fill-column (if width (prefix-numeric-value width) fill-column))) | |
524 | (save-restriction | |
525 | (while (cdr marks) | |
eec82323 LMI |
526 | (narrow-to-region (caar marks) (caadr marks)) |
527 | (let ((adaptive-fill-regexp | |
528 | (concat "^" (regexp-quote (cdar marks)) " *")) | |
23f87bed MB |
529 | (fill-prefix |
530 | (if (string= (cdar marks) "") "" | |
531 | (concat (cdar marks) " "))) | |
532 | use-hard-newlines) | |
eec82323 LMI |
533 | (fill-region (point-min) (point-max))) |
534 | (set-marker (caar marks) nil) | |
535 | (setq marks (cdr marks))) | |
536 | (when marks | |
537 | (set-marker (caar marks) nil)) | |
538 | ;; All this information is now incorrect. | |
539 | (setq gnus-cite-prefix-alist nil | |
540 | gnus-cite-attribution-alist nil | |
541 | gnus-cite-loose-prefix-alist nil | |
a8151ef7 LMI |
542 | gnus-cite-loose-attribution-alist nil |
543 | gnus-cite-article nil))))) | |
eec82323 LMI |
544 | |
545 | (defun gnus-article-hide-citation (&optional arg force) | |
546 | "Toggle hiding of all cited text except attribution lines. | |
547 | See the documentation for `gnus-article-highlight-citation'. | |
548 | If given a negative prefix, always show; if given a positive prefix, | |
549 | always hide." | |
550 | (interactive (append (gnus-article-hidden-arg) (list 'force))) | |
6748645f LMI |
551 | (gnus-set-format 'cited-opened-text-button t) |
552 | (gnus-set-format 'cited-closed-text-button t) | |
eec82323 LMI |
553 | (save-excursion |
554 | (set-buffer gnus-article-buffer) | |
eec82323 | 555 | (let ((buffer-read-only nil) |
520aa572 | 556 | marks |
eec82323 LMI |
557 | (inhibit-point-motion-hooks t) |
558 | (props (nconc (list 'article-type 'cite) | |
559 | gnus-hidden-properties)) | |
520aa572 SZ |
560 | (point (point-min)) |
561 | found beg end start) | |
a1506d29 JB |
562 | (while (setq point |
563 | (text-property-any point (point-max) | |
520aa572 SZ |
564 | 'gnus-callback |
565 | 'gnus-article-toggle-cited-text)) | |
566 | (setq found t) | |
567 | (goto-char point) | |
568 | (gnus-article-toggle-cited-text | |
569 | (get-text-property point 'gnus-data) arg) | |
570 | (forward-line 1) | |
571 | (setq point (point))) | |
572 | (unless found | |
573 | (setq marks (gnus-dissect-cited-text)) | |
574 | (while marks | |
575 | (setq beg nil | |
576 | end nil) | |
577 | (while (and marks (string= (cdar marks) "")) | |
578 | (setq marks (cdr marks))) | |
579 | (when marks | |
580 | (setq beg (caar marks))) | |
581 | (while (and marks (not (string= (cdar marks) ""))) | |
582 | (setq marks (cdr marks))) | |
583 | (when marks | |
eec82323 | 584 | (setq end (caar marks))) |
520aa572 SZ |
585 | ;; Skip past lines we want to leave visible. |
586 | (when (and beg end gnus-cited-lines-visible) | |
587 | (goto-char beg) | |
588 | (forward-line (if (consp gnus-cited-lines-visible) | |
589 | (car gnus-cited-lines-visible) | |
590 | gnus-cited-lines-visible)) | |
591 | (if (>= (point) end) | |
592 | (setq beg nil) | |
593 | (setq beg (point-marker)) | |
594 | (when (consp gnus-cited-lines-visible) | |
595 | (goto-char end) | |
596 | (forward-line (- (cdr gnus-cited-lines-visible))) | |
597 | (if (<= (point) beg) | |
598 | (setq beg nil) | |
16409b0b | 599 | (setq end (point-marker)))))) |
520aa572 | 600 | (when (and beg end) |
23f87bed | 601 | (gnus-add-wash-type 'cite) |
520aa572 SZ |
602 | ;; We use markers for the end-points to facilitate later |
603 | ;; wrapping and mangling of text. | |
604 | (setq beg (set-marker (make-marker) beg) | |
605 | end (set-marker (make-marker) end)) | |
606 | (gnus-add-text-properties-when 'article-type nil beg end props) | |
607 | (goto-char beg) | |
eb1666e2 MB |
608 | (when (and gnus-cite-blank-line-after-header |
609 | (not (save-excursion (search-backward "\n\n" nil t)))) | |
520aa572 SZ |
610 | (insert "\n")) |
611 | (put-text-property | |
612 | (setq start (point-marker)) | |
613 | (progn | |
eec82323 LMI |
614 | (gnus-article-add-button |
615 | (point) | |
6748645f LMI |
616 | (progn (eval gnus-cited-closed-text-button-line-format-spec) |
617 | (point)) | |
618 | `gnus-article-toggle-cited-text | |
619 | (list (cons beg end) start)) | |
eec82323 | 620 | (point)) |
520aa572 SZ |
621 | 'article-type 'annotation) |
622 | (set-marker beg (point)))))))) | |
eec82323 | 623 | |
520aa572 SZ |
624 | (defun gnus-article-toggle-cited-text (args &optional arg) |
625 | "Toggle hiding the text in REGION. | |
626 | ARG can be nil or a number. Positive means hide, negative | |
627 | means show, nil means toggle." | |
6748645f | 628 | (let* ((region (car args)) |
16409b0b GM |
629 | (beg (car region)) |
630 | (end (cdr region)) | |
6748645f LMI |
631 | (start (cadr args)) |
632 | (hidden | |
520aa572 | 633 | (text-property-any beg (1- end) 'article-type 'cite)) |
6748645f LMI |
634 | (inhibit-point-motion-hooks t) |
635 | buffer-read-only) | |
520aa572 SZ |
636 | (when (or (null arg) |
637 | (zerop arg) | |
638 | (and (> arg 0) (not hidden)) | |
639 | (and (< arg 0) hidden)) | |
640 | (if hidden | |
23f87bed MB |
641 | (progn |
642 | ;; Can't remove 'cite from g-a-wash-types here because | |
643 | ;; multiple citations may be hidden -jas | |
644 | (gnus-remove-text-properties-when | |
645 | 'article-type 'cite beg end | |
646 | (cons 'article-type (cons 'cite | |
647 | gnus-hidden-properties)))) | |
648 | (gnus-add-wash-type 'cite) | |
520aa572 | 649 | (gnus-add-text-properties-when |
a1506d29 | 650 | 'article-type nil beg end |
520aa572 SZ |
651 | (cons 'article-type (cons 'cite |
652 | gnus-hidden-properties)))) | |
23f87bed MB |
653 | (let ((gnus-article-mime-handle-alist-1 gnus-article-mime-handle-alist)) |
654 | (gnus-set-mode-line 'article)) | |
520aa572 SZ |
655 | (save-excursion |
656 | (goto-char start) | |
657 | (gnus-delete-line) | |
658 | (put-text-property | |
659 | (point) | |
660 | (progn | |
661 | (gnus-article-add-button | |
662 | (point) | |
663 | (progn (eval | |
664 | (if hidden | |
665 | gnus-cited-opened-text-button-line-format-spec | |
666 | gnus-cited-closed-text-button-line-format-spec)) | |
667 | (point)) | |
668 | `gnus-article-toggle-cited-text | |
669 | args) | |
670 | (point)) | |
671 | 'article-type 'annotation))))) | |
eec82323 LMI |
672 | |
673 | (defun gnus-article-hide-citation-maybe (&optional arg force) | |
674 | "Toggle hiding of cited text that has an attribution line. | |
675 | If given a negative prefix, always show; if given a positive prefix, | |
676 | always hide. | |
677 | This will do nothing unless at least `gnus-cite-hide-percentage' | |
678 | percent and at least `gnus-cite-hide-absolute' lines of the body is | |
679 | cited text with attributions. When called interactively, these two | |
680 | variables are ignored. | |
681 | See also the documentation for `gnus-article-highlight-citation'." | |
6748645f | 682 | (interactive (append (gnus-article-hidden-arg) '(force))) |
23f87bed MB |
683 | (with-current-buffer gnus-article-buffer |
684 | (gnus-delete-wash-type 'cite) | |
685 | (unless (gnus-article-check-hidden-text 'cite arg) | |
686 | (save-excursion | |
687 | (gnus-cite-parse-maybe force) | |
688 | (article-goto-body) | |
689 | (let ((start (point)) | |
690 | (atts gnus-cite-attribution-alist) | |
691 | (buffer-read-only nil) | |
692 | (inhibit-point-motion-hooks t) | |
693 | (hidden 0) | |
694 | total) | |
695 | (goto-char (point-max)) | |
696 | (gnus-article-search-signature) | |
697 | (setq total (count-lines start (point))) | |
eec82323 | 698 | (while atts |
23f87bed MB |
699 | (setq hidden (+ hidden (length (cdr (assoc (cdar atts) |
700 | gnus-cite-prefix-alist)))) | |
701 | atts (cdr atts))) | |
702 | (when (or force | |
703 | (and (> (* 100 hidden) (* gnus-cite-hide-percentage total)) | |
704 | (> hidden gnus-cite-hide-absolute))) | |
705 | (gnus-add-wash-type 'cite) | |
706 | (setq atts gnus-cite-attribution-alist) | |
707 | (while atts | |
708 | (setq total (cdr (assoc (cdar atts) gnus-cite-prefix-alist)) | |
709 | atts (cdr atts)) | |
710 | (while total | |
711 | (setq hidden (car total) | |
712 | total (cdr total)) | |
713 | (goto-char (point-min)) | |
714 | (forward-line (1- hidden)) | |
715 | (unless (assq hidden gnus-cite-attribution-alist) | |
716 | (gnus-add-text-properties | |
717 | (point) (progn (forward-line 1) (point)) | |
718 | (nconc (list 'article-type 'cite) | |
719 | gnus-hidden-properties))))))))) | |
720 | (gnus-set-mode-line 'article))) | |
eec82323 LMI |
721 | |
722 | (defun gnus-article-hide-citation-in-followups () | |
723 | "Hide cited text in non-root articles." | |
724 | (interactive) | |
725 | (save-excursion | |
726 | (set-buffer gnus-article-buffer) | |
727 | (let ((article (cdr gnus-article-current))) | |
728 | (unless (save-excursion | |
729 | (set-buffer gnus-summary-buffer) | |
730 | (gnus-article-displayed-root-p article)) | |
731 | (gnus-article-hide-citation))))) | |
732 | ||
733 | ;;; Internal functions: | |
734 | ||
16409b0b GM |
735 | (defun gnus-cite-parse-maybe (&optional force no-overlay) |
736 | "Always parse the buffer." | |
737 | (gnus-cite-localize) | |
738 | ;;Reset parser information. | |
739 | (setq gnus-cite-prefix-alist nil | |
740 | gnus-cite-attribution-alist nil | |
741 | gnus-cite-loose-prefix-alist nil | |
742 | gnus-cite-loose-attribution-alist nil) | |
743 | (unless no-overlay | |
744 | (gnus-cite-delete-overlays)) | |
745 | ;; Parse if not too large. | |
746 | (if (and gnus-cite-parse-max-size | |
747 | (> (buffer-size) gnus-cite-parse-max-size)) | |
eec82323 | 748 | () |
16409b0b GM |
749 | (setq gnus-cite-article (cons (car gnus-article-current) |
750 | (cdr gnus-article-current))) | |
751 | (gnus-cite-parse-wrapper))) | |
752 | ||
753 | (defun gnus-cite-delete-overlays () | |
754 | (dolist (overlay gnus-cite-overlay-list) | |
23f87bed MB |
755 | (ignore-errors |
756 | (when (or (not (gnus-overlay-end overlay)) | |
757 | (and (>= (gnus-overlay-end overlay) (point-min)) | |
758 | (<= (gnus-overlay-end overlay) (point-max)))) | |
759 | (setq gnus-cite-overlay-list (delete overlay gnus-cite-overlay-list)) | |
760 | (ignore-errors | |
761 | (gnus-delete-overlay overlay)))))) | |
eec82323 LMI |
762 | |
763 | (defun gnus-cite-parse-wrapper () | |
16409b0b GM |
764 | ;; Wrap chopped gnus-cite-parse. |
765 | (article-goto-body) | |
766 | (let ((inhibit-point-motion-hooks t)) | |
767 | (save-excursion | |
768 | (gnus-cite-parse-attributions)) | |
769 | (save-excursion | |
770 | (gnus-cite-parse)) | |
771 | (save-excursion | |
772 | (gnus-cite-connect-attributions)))) | |
eec82323 LMI |
773 | |
774 | (defun gnus-cite-parse () | |
775 | ;; Parse and connect citation prefixes and attribution lines. | |
776 | ||
777 | ;; Parse current buffer searching for citation prefixes. | |
778 | (let ((line (1+ (count-lines (point-min) (point)))) | |
779 | (case-fold-search t) | |
780 | (max (save-excursion | |
781 | (goto-char (point-max)) | |
782 | (gnus-article-search-signature) | |
783 | (point))) | |
23f87bed MB |
784 | (prefix-regexp (concat "^\\(" message-cite-prefix-regexp "\\)")) |
785 | alist entry start begin end numbers prefix guess-limit) | |
eec82323 LMI |
786 | ;; Get all potential prefixes in `alist'. |
787 | (while (< (point) max) | |
788 | ;; Each line. | |
789 | (setq begin (point) | |
23f87bed | 790 | guess-limit (progn (skip-chars-forward "^> \t\r\n") (point)) |
01c52d31 | 791 | end (point-at-bol 2) |
eec82323 LMI |
792 | start end) |
793 | (goto-char begin) | |
794 | ;; Ignore standard Supercite attribution prefix. | |
23f87bed MB |
795 | (when (and (< guess-limit (+ begin gnus-cite-max-prefix)) |
796 | (looking-at gnus-supercite-regexp)) | |
eec82323 LMI |
797 | (if (match-end 1) |
798 | (setq end (1+ (match-end 1))) | |
799 | (setq end (1+ begin)))) | |
800 | ;; Ignore very long prefixes. | |
23f87bed MB |
801 | (when (> end (+ begin gnus-cite-max-prefix)) |
802 | (setq end (+ begin gnus-cite-max-prefix))) | |
803 | ;; Ignore quoted envelope From_. | |
804 | (when (and gnus-cite-ignore-quoted-from | |
805 | (prog2 | |
806 | (setq case-fold-search nil) | |
807 | (looking-at ">From ") | |
808 | (setq case-fold-search t))) | |
809 | (setq end (1+ begin))) | |
810 | (while (re-search-forward prefix-regexp (1- end) t) | |
eec82323 LMI |
811 | ;; Each prefix. |
812 | (setq end (match-end 0) | |
813 | prefix (buffer-substring begin end)) | |
01c52d31 | 814 | (set-text-properties 0 (length prefix) nil prefix) |
eec82323 LMI |
815 | (setq entry (assoc prefix alist)) |
816 | (if entry | |
817 | (setcdr entry (cons line (cdr entry))) | |
818 | (push (list prefix line) alist)) | |
819 | (goto-char begin)) | |
820 | (goto-char start) | |
821 | (setq line (1+ line))) | |
23f87bed MB |
822 | ;; Horrible special case for some Microsoft mailers. |
823 | (goto-char (point-min)) | |
01c52d31 MB |
824 | (setq start t begin nil entry nil) |
825 | (while start | |
826 | ;; Assume this search ends up at the beginning of a line. | |
827 | (if (re-search-forward gnus-cite-unsightly-citation-regexp max t) | |
828 | (progn | |
829 | (when (number-or-marker-p start) | |
830 | (setq begin (count-lines (point-min) start) | |
831 | end (count-lines (point-min) (match-beginning 0)))) | |
832 | (setq start (match-end 0))) | |
833 | (when (number-or-marker-p start) | |
834 | (setq begin (count-lines (point-min) start) | |
835 | end (count-lines (point-min) max))) | |
836 | (setq start nil)) | |
837 | (when begin | |
838 | (while (< begin end) | |
839 | ;; Need to do 1+ because we're in the bol. | |
840 | (push (setq begin (1+ begin)) entry)))) | |
841 | (when entry | |
23f87bed | 842 | (push (cons "" entry) alist)) |
eec82323 LMI |
843 | ;; We got all the potential prefixes. Now create |
844 | ;; `gnus-cite-prefix-alist' containing the oldest prefix for each | |
23f87bed | 845 | ;; line that appears at least `gnus-cite-minimum-match-count' |
eec82323 LMI |
846 | ;; times. First sort them by length. Longer is older. |
847 | (setq alist (sort alist (lambda (a b) | |
848 | (> (length (car a)) (length (car b)))))) | |
849 | (while alist | |
850 | (setq entry (car alist) | |
851 | prefix (car entry) | |
852 | numbers (cdr entry) | |
853 | alist (cdr alist)) | |
854 | (cond ((null numbers) | |
855 | ;; No lines with this prefix that wasn't also part of | |
856 | ;; a longer prefix. | |
857 | ) | |
858 | ((< (length numbers) gnus-cite-minimum-match-count) | |
859 | ;; Too few lines with this prefix. We keep it a bit | |
860 | ;; longer in case it is an exact match for an attribution | |
861 | ;; line, but we don't remove the line from other | |
862 | ;; prefixes. | |
863 | (push entry gnus-cite-prefix-alist)) | |
864 | (t | |
865 | (push entry | |
866 | gnus-cite-prefix-alist) | |
867 | ;; Remove articles from other prefixes. | |
868 | (let ((loop alist) | |
869 | current) | |
870 | (while loop | |
871 | (setq current (car loop) | |
872 | loop (cdr loop)) | |
873 | (setcdr current | |
874 | (gnus-set-difference (cdr current) numbers))))))))) | |
875 | ||
876 | (defun gnus-cite-parse-attributions () | |
877 | (let (al-alist) | |
878 | ;; Parse attributions | |
879 | (while (re-search-forward gnus-cite-attribution-suffix (point-max) t) | |
880 | (let* ((start (match-beginning 0)) | |
881 | (end (match-end 0)) | |
882 | (wrote (count-lines (point-min) end)) | |
883 | (prefix (gnus-cite-find-prefix wrote)) | |
884 | ;; Check previous line for an attribution leader. | |
885 | (tag (progn | |
886 | (beginning-of-line 1) | |
887 | (when (looking-at gnus-supercite-secondary-regexp) | |
888 | (buffer-substring (match-beginning 1) | |
889 | (match-end 1))))) | |
890 | (in (progn | |
891 | (goto-char start) | |
892 | (and (re-search-backward gnus-cite-attribution-prefix | |
893 | (save-excursion | |
894 | (beginning-of-line 0) | |
895 | (point)) | |
896 | t) | |
897 | (not (re-search-forward gnus-cite-attribution-suffix | |
898 | start t)) | |
899 | (count-lines (point-min) (1+ (point))))))) | |
900 | (when (eq wrote in) | |
901 | (setq in nil)) | |
902 | (goto-char end) | |
903 | ;; don't add duplicates | |
904 | (let ((al (buffer-substring (save-excursion (beginning-of-line 0) | |
905 | (1+ (point))) | |
906 | end))) | |
01c52d31 MB |
907 | (when (not (assoc al al-alist)) |
908 | (push (list wrote in prefix tag) | |
909 | gnus-cite-loose-attribution-alist) | |
910 | (push (cons al t) al-alist))))))) | |
eec82323 LMI |
911 | |
912 | (defun gnus-cite-connect-attributions () | |
913 | ;; Connect attributions to citations | |
914 | ||
915 | ;; No citations have been connected to attribution lines yet. | |
916 | (setq gnus-cite-loose-prefix-alist (append gnus-cite-prefix-alist nil)) | |
917 | ||
918 | ;; Parse current buffer searching for attribution lines. | |
919 | ;; Find exact supercite citations. | |
920 | (gnus-cite-match-attributions 'small nil | |
921 | (lambda (prefix tag) | |
922 | (when tag | |
923 | (concat "\\`" | |
924 | (regexp-quote prefix) "[ \t]*" | |
925 | (regexp-quote tag) ">")))) | |
926 | ;; Find loose supercite citations after attributions. | |
927 | (gnus-cite-match-attributions 'small t | |
928 | (lambda (prefix tag) | |
929 | (when tag | |
930 | (concat "\\<" | |
931 | (regexp-quote tag) | |
932 | "\\>")))) | |
933 | ;; Find loose supercite citations anywhere. | |
934 | (gnus-cite-match-attributions 'small nil | |
935 | (lambda (prefix tag) | |
936 | (when tag | |
937 | (concat "\\<" | |
938 | (regexp-quote tag) | |
939 | "\\>")))) | |
940 | ;; Find nested citations after attributions. | |
941 | (gnus-cite-match-attributions 'small-if-unique t | |
942 | (lambda (prefix tag) | |
943 | (concat "\\`" (regexp-quote prefix) ".+"))) | |
944 | ;; Find nested citations anywhere. | |
945 | (gnus-cite-match-attributions 'small nil | |
946 | (lambda (prefix tag) | |
947 | (concat "\\`" (regexp-quote prefix) ".+"))) | |
948 | ;; Remove loose prefixes with too few lines. | |
949 | (let ((alist gnus-cite-loose-prefix-alist) | |
950 | entry) | |
951 | (while alist | |
952 | (setq entry (car alist) | |
953 | alist (cdr alist)) | |
954 | (when (< (length (cdr entry)) gnus-cite-minimum-match-count) | |
955 | (setq gnus-cite-prefix-alist | |
956 | (delq entry gnus-cite-prefix-alist) | |
957 | gnus-cite-loose-prefix-alist | |
958 | (delq entry gnus-cite-loose-prefix-alist))))) | |
959 | ;; Find flat attributions. | |
960 | (gnus-cite-match-attributions 'first t nil) | |
961 | ;; Find any attributions (are we getting desperate yet?). | |
962 | (gnus-cite-match-attributions 'first nil nil)) | |
963 | ||
964 | (defun gnus-cite-match-attributions (sort after fun) | |
965 | ;; Match all loose attributions and citations (SORT AFTER FUN) . | |
966 | ;; | |
967 | ;; If SORT is `small', the citation with the shortest prefix will be | |
968 | ;; used, if it is `first' the first prefix will be used, if it is | |
969 | ;; `small-if-unique' the shortest prefix will be used if the | |
970 | ;; attribution line does not share its own prefix with other | |
971 | ;; loose attribution lines, otherwise the first prefix will be used. | |
972 | ;; | |
973 | ;; If AFTER is non-nil, only citations after the attribution line | |
974 | ;; will be considered. | |
975 | ;; | |
976 | ;; If FUN is non-nil, it will be called with the arguments (WROTE | |
977 | ;; PREFIX TAG) and expected to return a regular expression. Only | |
978 | ;; citations whose prefix matches the regular expression will be | |
979 | ;; considered. | |
980 | ;; | |
981 | ;; WROTE is the attribution line number. | |
982 | ;; PREFIX is the attribution line prefix. | |
983 | ;; TAG is the Supercite tag on the attribution line. | |
984 | (let ((atts gnus-cite-loose-attribution-alist) | |
985 | (case-fold-search t) | |
986 | att wrote in prefix tag regexp limit smallest best size) | |
987 | (while atts | |
988 | (setq att (car atts) | |
989 | atts (cdr atts) | |
990 | wrote (nth 0 att) | |
991 | in (nth 1 att) | |
992 | prefix (nth 2 att) | |
993 | tag (nth 3 att) | |
994 | regexp (if fun (funcall fun prefix tag) "") | |
995 | size (cond ((eq sort 'small) t) | |
996 | ((eq sort 'first) nil) | |
997 | (t (< (length (gnus-cite-find-loose prefix)) 2))) | |
998 | limit (if after wrote -1) | |
999 | smallest 1000000 | |
1000 | best nil) | |
1001 | (let ((cites gnus-cite-loose-prefix-alist) | |
1002 | cite candidate numbers first compare) | |
1003 | (while cites | |
1004 | (setq cite (car cites) | |
1005 | cites (cdr cites) | |
1006 | candidate (car cite) | |
1007 | numbers (cdr cite) | |
1008 | first (apply 'min numbers) | |
1009 | compare (if size (length candidate) first)) | |
1010 | (and (> first limit) | |
1011 | regexp | |
1012 | (string-match regexp candidate) | |
1013 | (< compare smallest) | |
1014 | (setq best cite | |
1015 | smallest compare)))) | |
1016 | (if (null best) | |
1017 | () | |
1018 | (setq gnus-cite-loose-attribution-alist | |
1019 | (delq att gnus-cite-loose-attribution-alist)) | |
1020 | (push (cons wrote (car best)) gnus-cite-attribution-alist) | |
1021 | (when in | |
1022 | (push (cons in (car best)) gnus-cite-attribution-alist)) | |
1023 | (when (memq best gnus-cite-loose-prefix-alist) | |
1024 | (let ((loop gnus-cite-prefix-alist) | |
1025 | (numbers (cdr best)) | |
1026 | current) | |
1027 | (setq gnus-cite-loose-prefix-alist | |
1028 | (delq best gnus-cite-loose-prefix-alist)) | |
1029 | (while loop | |
1030 | (setq current (car loop) | |
1031 | loop (cdr loop)) | |
1032 | (if (eq current best) | |
1033 | () | |
1034 | (setcdr current (gnus-set-difference (cdr current) numbers)) | |
1035 | (when (null (cdr current)) | |
1036 | (setq gnus-cite-loose-prefix-alist | |
1037 | (delq current gnus-cite-loose-prefix-alist) | |
1038 | atts (delq current atts))))))))))) | |
1039 | ||
1040 | (defun gnus-cite-find-loose (prefix) | |
1041 | ;; Return a list of loose attribution lines prefixed by PREFIX. | |
1042 | (let* ((atts gnus-cite-loose-attribution-alist) | |
1043 | att line lines) | |
1044 | (while atts | |
1045 | (setq att (car atts) | |
1046 | line (car att) | |
1047 | atts (cdr atts)) | |
1048 | (when (string-equal (gnus-cite-find-prefix line) prefix) | |
1049 | (push line lines))) | |
1050 | lines)) | |
1051 | ||
1052 | (defun gnus-cite-add-face (number prefix face) | |
1053 | ;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line. | |
1054 | (when face | |
1055 | (let ((inhibit-point-motion-hooks t) | |
6748645f | 1056 | from to overlay) |
16409b0b GM |
1057 | (goto-char (point-min)) |
1058 | (when (zerop (forward-line (1- number))) | |
eec82323 LMI |
1059 | (forward-char (length prefix)) |
1060 | (skip-chars-forward " \t") | |
1061 | (setq from (point)) | |
1062 | (end-of-line 1) | |
1063 | (skip-chars-backward " \t") | |
1064 | (setq to (point)) | |
1065 | (when (< from to) | |
6748645f LMI |
1066 | (push (setq overlay (gnus-make-overlay from to)) |
1067 | gnus-cite-overlay-list) | |
c1b1a4f3 | 1068 | (gnus-overlay-put overlay 'evaporate t) |
6748645f | 1069 | (gnus-overlay-put overlay 'face face)))))) |
eec82323 LMI |
1070 | |
1071 | (defun gnus-cite-toggle (prefix) | |
1072 | (save-excursion | |
1073 | (set-buffer gnus-article-buffer) | |
16409b0b | 1074 | (gnus-cite-parse-maybe nil t) |
eec82323 LMI |
1075 | (let ((buffer-read-only nil) |
1076 | (numbers (cdr (assoc prefix gnus-cite-prefix-alist))) | |
1077 | (inhibit-point-motion-hooks t) | |
1078 | number) | |
1079 | (while numbers | |
1080 | (setq number (car numbers) | |
1081 | numbers (cdr numbers)) | |
16409b0b GM |
1082 | (goto-char (point-min)) |
1083 | (forward-line (1- number)) | |
eec82323 | 1084 | (cond ((get-text-property (point) 'invisible) |
23f87bed MB |
1085 | ;; Can't remove 'cite from g-a-wash-types here because |
1086 | ;; multiple citations may be hidden -jas | |
eec82323 LMI |
1087 | (remove-text-properties (point) (progn (forward-line 1) (point)) |
1088 | gnus-hidden-properties)) | |
1089 | ((assq number gnus-cite-attribution-alist)) | |
1090 | (t | |
23f87bed | 1091 | (gnus-add-wash-type 'cite) |
eec82323 LMI |
1092 | (gnus-add-text-properties |
1093 | (point) (progn (forward-line 1) (point)) | |
1094 | (nconc (list 'article-type 'cite) | |
23f87bed MB |
1095 | gnus-hidden-properties)))) |
1096 | (let ((gnus-article-mime-handle-alist-1 | |
1097 | gnus-article-mime-handle-alist)) | |
1098 | (gnus-set-mode-line 'article)))))) | |
eec82323 LMI |
1099 | |
1100 | (defun gnus-cite-find-prefix (line) | |
1101 | ;; Return citation prefix for LINE. | |
1102 | (let ((alist gnus-cite-prefix-alist) | |
1103 | (prefix "") | |
1104 | entry) | |
1105 | (while alist | |
1106 | (setq entry (car alist) | |
1107 | alist (cdr alist)) | |
1108 | (when (memq line (cdr entry)) | |
1109 | (setq prefix (car entry)))) | |
1110 | prefix)) | |
1111 | ||
6748645f LMI |
1112 | (defun gnus-cite-localize () |
1113 | "Make the citation variables local to the article buffer." | |
1114 | (let ((vars '(gnus-cite-article | |
1115 | gnus-cite-overlay-list gnus-cite-prefix-alist | |
1116 | gnus-cite-attribution-alist gnus-cite-loose-prefix-alist | |
1117 | gnus-cite-loose-attribution-alist))) | |
1118 | (while vars | |
1119 | (make-local-variable (pop vars))))) | |
eec82323 | 1120 | |
23f87bed MB |
1121 | (defun gnus-cited-line-p () |
1122 | "Say whether the current line is a cited line." | |
1123 | (save-excursion | |
1124 | (beginning-of-line) | |
1125 | (let ((found nil)) | |
1126 | (dolist (prefix (mapcar 'car gnus-cite-prefix-alist)) | |
1127 | (when (string= (buffer-substring (point) (+ (length prefix) (point))) | |
1128 | prefix) | |
1129 | (setq found t))) | |
1130 | found))) | |
1131 | ||
01c52d31 MB |
1132 | |
1133 | ;; Highlighting of different citation levels in message-mode. | |
1134 | ;; - message-cite-prefix will be overridden if this is enabled. | |
1135 | ||
1136 | (defvar gnus-message-max-citation-depth | |
1137 | (length gnus-cite-face-list) | |
1138 | "Maximum supported level of citation.") | |
1139 | ||
1140 | (defvar gnus-message-cite-prefix-regexp | |
1141 | (concat "^\\(?:" message-cite-prefix-regexp "\\)")) | |
1142 | ||
1143 | (defun gnus-message-search-citation-line (limit) | |
1144 | "Search for a cited line and set match data accordingly. | |
1145 | Returns nil if there is no such line before LIMIT, t otherwise." | |
1146 | (when (re-search-forward gnus-message-cite-prefix-regexp limit t) | |
1147 | (let ((cdepth (min (length (apply 'concat | |
1148 | (split-string | |
1149 | (match-string-no-properties 0) | |
1150 | "[ \t [:alnum:]]+"))) | |
1151 | gnus-message-max-citation-depth)) | |
1152 | (mlist (make-list (* (1+ gnus-message-max-citation-depth) 2) nil)) | |
1153 | (start (point-at-bol)) | |
1154 | (end (point-at-eol))) | |
1155 | (setcar mlist start) | |
1156 | (setcar (cdr mlist) end) | |
1157 | (setcar (nthcdr (* cdepth 2) mlist) start) | |
1158 | (setcar (nthcdr (1+ (* cdepth 2)) mlist) end) | |
1159 | (set-match-data mlist)) | |
1160 | t)) | |
1161 | ||
1162 | (defvar gnus-message-citation-keywords | |
1163 | ;; eval-when-compile ;; This breaks in XEmacs | |
1164 | `((gnus-message-search-citation-line | |
1165 | ,@(let ((list nil) | |
1166 | (count 1)) | |
1167 | ;; (require 'gnus-cite) | |
1168 | (dolist (face gnus-cite-face-list (nreverse list)) | |
1169 | (push (list count (list 'quote face) 'prepend t) list) | |
1170 | (setq count (1+ count)))))) ;; | |
1171 | "Keywords for highlighting different levels of message citations.") | |
1172 | ||
1173 | (eval-when-compile | |
1174 | (defvar font-lock-defaults-computed) | |
1175 | (defvar font-lock-keywords) | |
1176 | (defvar font-lock-set-defaults)) | |
1177 | ||
1178 | (eval-and-compile | |
1179 | (unless (featurep 'xemacs) | |
1180 | (autoload 'font-lock-set-defaults "font-lock"))) | |
1181 | ||
1182 | (define-minor-mode gnus-message-citation-mode | |
1183 | "Toggle `gnus-message-citation-mode' in current buffer. | |
1184 | This buffer local minor mode provides additional font-lock support for | |
1185 | nested citations. | |
1186 | With prefix ARG, turn `gnus-message-citation-mode' on if and only if ARG | |
1187 | is positive. | |
1188 | Automatically turn `font-lock-mode' on when `gnus-message-citation-mode' | |
1189 | is turned on." | |
1190 | nil ;; init-value | |
1191 | "" ;; lighter | |
1192 | nil ;; keymap | |
1193 | (when (eq major-mode 'message-mode) | |
1194 | (let ((defaults (car (if (featurep 'xemacs) | |
1195 | (get 'message-mode 'font-lock-defaults) | |
1196 | font-lock-defaults))) | |
1197 | default keywords) | |
1198 | (while defaults | |
1199 | (setq default (if (consp defaults) | |
1200 | (pop defaults) | |
1201 | (prog1 | |
1202 | defaults | |
1203 | (setq defaults nil)))) | |
1204 | (if gnus-message-citation-mode | |
1205 | ;; `gnus-message-citation-keywords' should be the last | |
1206 | ;; elements of the keywords because the others are unlikely | |
1207 | ;; to have the OVERRIDE flags -- XEmacs applies a keyword | |
1208 | ;; having no OVERRIDE flag to matched text even if it has | |
1209 | ;; already other faces, while Emacs doesn't. | |
1210 | (set (make-local-variable default) | |
1211 | (append (default-value default) | |
1212 | gnus-message-citation-keywords)) | |
1213 | (kill-local-variable default)))) | |
1214 | ;; Force `font-lock-set-defaults' to update `font-lock-keywords'. | |
1215 | (if (featurep 'xemacs) | |
1216 | (progn | |
1217 | (require 'font-lock) | |
1218 | (setq font-lock-defaults-computed nil | |
1219 | font-lock-keywords nil)) | |
1220 | (setq font-lock-set-defaults nil)) | |
1221 | (font-lock-set-defaults) | |
1222 | (cond ((symbol-value 'font-lock-mode) | |
1223 | (font-lock-fontify-buffer)) | |
1224 | (gnus-message-citation-mode | |
1225 | (font-lock-mode 1))))) | |
1226 | ||
1227 | (defun turn-on-gnus-message-citation-mode () | |
1228 | "Turn on `gnus-message-citation-mode'." | |
1229 | (gnus-message-citation-mode 1)) | |
1230 | (defun turn-off-gnus-message-citation-mode () | |
1231 | "Turn off `gnus-message-citation-mode'." | |
1232 | (gnus-message-citation-mode -1)) | |
1233 | ||
eec82323 LMI |
1234 | (gnus-ems-redefine) |
1235 | ||
1236 | (provide 'gnus-cite) | |
1237 | ||
16409b0b GM |
1238 | ;; Local Variables: |
1239 | ;; coding: iso-8859-1 | |
1240 | ;; End: | |
1241 | ||
ab5796a9 | 1242 | ;;; arch-tag: 1997b044-6067-471e-8c8f-dc903093098a |
eec82323 | 1243 | ;;; gnus-cite.el ends here |