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1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2 ;; Copyright (C) 1996 Free Software Foundation, Inc.
3
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
5
6 ;; This file is part of GNU Emacs.
7
8 ;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 2, or (at your option)
11 ;; any later version.
12
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
17
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs; see the file COPYING. If not, write to the
20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 ;; Boston, MA 02111-1307, USA.
22
23 ;;; Commentary:
24
25 ;;; Code:
26
27 (require 'gnus)
28 (eval-when-compile (require 'cl))
29
30 ;;;
31 ;;; gnus-pick-mode
32 ;;;
33
34 (defvar gnus-pick-mode nil
35 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
36
37 (defvar gnus-pick-display-summary nil
38 "*Display summary while reading.")
39
40 (defvar gnus-pick-mode-hook nil
41 "Hook run in summary pick mode buffers.")
42
43 ;;; Internal variables.
44
45 (defvar gnus-pick-mode-map nil)
46
47 (unless gnus-pick-mode-map
48 (setq gnus-pick-mode-map (make-sparse-keymap))
49
50 (gnus-define-keys
51 gnus-pick-mode-map
52 "t" gnus-uu-mark-thread
53 "T" gnus-uu-unmark-thread
54 " " gnus-summary-mark-as-processable
55 "u" gnus-summary-unmark-as-processable
56 "U" gnus-summary-unmark-all-processable
57 "v" gnus-uu-mark-over
58 "r" gnus-uu-mark-region
59 "R" gnus-uu-unmark-region
60 "e" gnus-uu-mark-by-regexp
61 "E" gnus-uu-mark-by-regexp
62 "b" gnus-uu-mark-buffer
63 "B" gnus-uu-unmark-buffer
64 "\r" gnus-pick-start-reading))
65
66 (defun gnus-pick-make-menu-bar ()
67 (unless (boundp 'gnus-pick-menu)
68 (easy-menu-define
69 gnus-pick-menu gnus-pick-mode-map ""
70 '("Pick"
71 ("Pick"
72 ["Article" gnus-summary-mark-as-processable t]
73 ["Thread" gnus-uu-mark-thread t]
74 ["Region" gnus-uu-mark-region t]
75 ["Regexp" gnus-uu-mark-regexp t]
76 ["Buffer" gnus-uu-mark-buffer t])
77 ("Unpick"
78 ["Article" gnus-summary-unmark-as-processable t]
79 ["Thread" gnus-uu-unmark-thread t]
80 ["Region" gnus-uu-unmark-region t]
81 ["Regexp" gnus-uu-unmark-regexp t]
82 ["Buffer" gnus-uu-unmark-buffer t])
83 ["Start reading" gnus-pick-start-reading t]
84 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
85
86 (defun gnus-pick-mode (&optional arg)
87 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
88
89 \\{gnus-pick-mode-map}"
90 (interactive "P")
91 (when (eq major-mode 'gnus-summary-mode)
92 (make-local-variable 'gnus-pick-mode)
93 (setq gnus-pick-mode
94 (if (null arg) (not gnus-pick-mode)
95 (> (prefix-numeric-value arg) 0)))
96 (when gnus-pick-mode
97 ;; Make sure that we don't select any articles upon group entry.
98 (make-local-variable 'gnus-auto-select-first)
99 (setq gnus-auto-select-first nil)
100 ;; Set up the menu.
101 (when (and menu-bar-mode
102 (gnus-visual-p 'pick-menu 'menu))
103 (gnus-pick-make-menu-bar))
104 (unless (assq 'gnus-pick-mode minor-mode-alist)
105 (push '(gnus-pick-mode " Pick") minor-mode-alist))
106 (unless (assq 'gnus-pick-mode minor-mode-map-alist)
107 (push (cons 'gnus-pick-mode gnus-pick-mode-map)
108 minor-mode-map-alist))
109 (run-hooks 'gnus-pick-mode-hook))))
110
111 (defun gnus-pick-start-reading (&optional catch-up)
112 "Start reading the picked articles.
113 If given a prefix, mark all unpicked articles as read."
114 (interactive "P")
115 (unless gnus-newsgroup-processable
116 (error "No articles have been picked"))
117 (gnus-summary-limit-to-articles nil)
118 (when catch-up
119 (gnus-summary-limit-mark-excluded-as-read))
120 (gnus-summary-first-unread-article)
121 (gnus-configure-windows (if gnus-pick-display-summary 'article 'pick) t))
122
123
124 ;;;
125 ;;; gnus-binary-mode
126 ;;;
127
128 (defvar gnus-binary-mode nil
129 "Minor mode for provind a binary group interface in Gnus summary buffers.")
130
131 (defvar gnus-binary-mode-hook nil
132 "Hook run in summary binary mode buffers.")
133
134 (defvar gnus-binary-mode-map nil)
135
136 (unless gnus-binary-mode-map
137 (setq gnus-binary-mode-map (make-sparse-keymap))
138
139 (gnus-define-keys
140 gnus-binary-mode-map
141 "g" gnus-binary-show-article))
142
143 (defun gnus-binary-make-menu-bar ()
144 (unless (boundp 'gnus-binary-menu)
145 (easy-menu-define
146 gnus-binary-menu gnus-binary-mode-map ""
147 '("Pick"
148 ["Switch binary mode off" gnus-binary-mode t]))))
149
150 (defun gnus-binary-mode (&optional arg)
151 "Minor mode for providing a binary group interface in Gnus summary buffers."
152 (interactive "P")
153 (when (eq major-mode 'gnus-summary-mode)
154 (make-local-variable 'gnus-binary-mode)
155 (setq gnus-binary-mode
156 (if (null arg) (not gnus-binary-mode)
157 (> (prefix-numeric-value arg) 0)))
158 (when gnus-binary-mode
159 ;; Make sure that we don't select any articles upon group entry.
160 (make-local-variable 'gnus-auto-select-first)
161 (setq gnus-auto-select-first nil)
162 (make-local-variable 'gnus-summary-display-article-function)
163 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
164 ;; Set up the menu.
165 (when (and menu-bar-mode
166 (gnus-visual-p 'binary-menu 'menu))
167 (gnus-binary-make-menu-bar))
168 (unless (assq 'gnus-binary-mode minor-mode-alist)
169 (push '(gnus-binary-mode " Binary") minor-mode-alist))
170 (unless (assq 'gnus-binary-mode minor-mode-map-alist)
171 (push (cons 'gnus-binary-mode gnus-binary-mode-map)
172 minor-mode-map-alist))
173 (run-hooks 'gnus-binary-mode-hook))))
174
175 (defun gnus-binary-display-article (article &optional all-header)
176 "Run ARTICLE through the binary decode functions."
177 (when (gnus-summary-goto-subject article)
178 (let ((gnus-view-pseudos 'automatic))
179 (gnus-uu-decode-uu))))
180
181 (defun gnus-binary-show-article (&optional arg)
182 "Bypass the binary functions and show the article."
183 (interactive "P")
184 (let (gnus-summary-display-article-function)
185 (gnus-summary-show-article arg)))
186
187 ;;;
188 ;;; gnus-tree-mode
189 ;;;
190
191 (defvar gnus-tree-line-format "%(%[%3,3n%]%)"
192 "Format of tree elements.")
193
194 (defvar gnus-tree-minimize-window t
195 "If non-nil, minimize the tree buffer window.
196 If a number, never let the tree buffer grow taller than that number of
197 lines.")
198
199 (defvar gnus-selected-tree-face 'modeline
200 "*Face used for highlighting selected articles in the thread tree.")
201
202 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
203 (?\{ . ?\}) (?< . ?>))
204 "Brackets used in tree nodes.")
205
206 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
207 "Charaters used to connect parents with children.")
208
209 (defvar gnus-tree-mode-line-format "Gnus: %%b %S %Z"
210 "*The format specification for the tree mode line.")
211
212 (defvar gnus-generate-tree-function 'gnus-generate-vertical-tree
213 "*Function for generating a thread tree.
214 Two predefined functions are available:
215 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'.")
216
217 (defvar gnus-tree-mode-hook nil
218 "*Hook run in tree mode buffers.")
219
220 ;;; Internal variables.
221
222 (defvar gnus-tree-line-format-alist
223 `((?n gnus-tmp-name ?s)
224 (?f gnus-tmp-from ?s)
225 (?N gnus-tmp-number ?d)
226 (?\[ gnus-tmp-open-bracket ?c)
227 (?\] gnus-tmp-close-bracket ?c)
228 (?s gnus-tmp-subject ?s)))
229
230 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
231
232 (defvar gnus-tree-mode-line-format-spec nil)
233 (defvar gnus-tree-line-format-spec nil)
234
235 (defvar gnus-tree-node-length nil)
236 (defvar gnus-selected-tree-overlay nil)
237
238 (defvar gnus-tree-displayed-thread nil)
239
240 (defvar gnus-tree-mode-map nil)
241 (put 'gnus-tree-mode 'mode-class 'special)
242
243 (unless gnus-tree-mode-map
244 (setq gnus-tree-mode-map (make-keymap))
245 (suppress-keymap gnus-tree-mode-map)
246 (gnus-define-keys
247 gnus-tree-mode-map
248 "\r" gnus-tree-select-article
249 gnus-mouse-2 gnus-tree-pick-article
250 "\C-?" gnus-tree-read-summary-keys
251
252 "\C-c\C-i" gnus-info-find-node)
253
254 (substitute-key-definition
255 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
256
257 (defun gnus-tree-make-menu-bar ()
258 (unless (boundp 'gnus-tree-menu)
259 (easy-menu-define
260 gnus-tree-menu gnus-tree-mode-map ""
261 '("Tree"
262 ["Select article" gnus-tree-select-article t]))))
263
264 (defun gnus-tree-mode ()
265 "Major mode for displaying thread trees."
266 (interactive)
267 (setq gnus-tree-mode-line-format-spec
268 (gnus-parse-format gnus-tree-mode-line-format
269 gnus-summary-mode-line-format-alist))
270 (setq gnus-tree-line-format-spec
271 (gnus-parse-format gnus-tree-line-format
272 gnus-tree-line-format-alist t))
273 (when (and menu-bar-mode
274 (gnus-visual-p 'tree-menu 'menu))
275 (gnus-tree-make-menu-bar))
276 (kill-all-local-variables)
277 (gnus-simplify-mode-line)
278 (setq mode-name "Tree")
279 (setq major-mode 'gnus-tree-mode)
280 (use-local-map gnus-tree-mode-map)
281 (buffer-disable-undo (current-buffer))
282 (setq buffer-read-only t)
283 (setq truncate-lines t)
284 (save-excursion
285 (gnus-set-work-buffer)
286 (gnus-tree-node-insert (make-mail-header "") nil)
287 (setq gnus-tree-node-length (1- (point))))
288 (run-hooks 'gnus-tree-mode-hook))
289
290 (defun gnus-tree-read-summary-keys (&optional arg)
291 "Read a summary buffer key sequence and execute it."
292 (interactive "P")
293 (let ((buf (current-buffer))
294 win)
295 (gnus-article-read-summary-keys arg nil t)
296 (when (setq win (get-buffer-window buf))
297 (select-window win)
298 (when gnus-selected-tree-overlay
299 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
300 (gnus-tree-minimize))))
301
302 (defun gnus-tree-select-article (article)
303 "Select the article under point, if any."
304 (interactive (list (gnus-tree-article-number)))
305 (let ((buf (current-buffer)))
306 (when article
307 (save-excursion
308 (set-buffer gnus-summary-buffer)
309 (gnus-summary-goto-article article))
310 (select-window (get-buffer-window buf)))))
311
312 (defun gnus-tree-pick-article (e)
313 "Select the article under the mouse pointer."
314 (interactive "e")
315 (mouse-set-point e)
316 (gnus-tree-select-article (gnus-tree-article-number)))
317
318 (defun gnus-tree-article-number ()
319 (get-text-property (point) 'gnus-number))
320
321 (defun gnus-tree-article-region (article)
322 "Return a cons with BEG and END of the article region."
323 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
324 (when pos
325 (cons pos (next-single-property-change pos 'gnus-number)))))
326
327 (defun gnus-tree-goto-article (article)
328 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
329 (when pos
330 (goto-char pos))))
331
332 (defun gnus-tree-recenter ()
333 "Center point in the tree window."
334 (let ((selected (selected-window))
335 (tree-window (get-buffer-window gnus-tree-buffer t)))
336 (when tree-window
337 (select-window tree-window)
338 (when gnus-selected-tree-overlay
339 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
340 (let* ((top (cond ((< (window-height) 4) 0)
341 ((< (window-height) 7) 1)
342 (t 2)))
343 (height (1- (window-height)))
344 (bottom (save-excursion (goto-char (point-max))
345 (forward-line (- height))
346 (point))))
347 ;; Set the window start to either `bottom', which is the biggest
348 ;; possible valid number, or the second line from the top,
349 ;; whichever is the least.
350 (set-window-start
351 tree-window (min bottom (save-excursion
352 (forward-line (- top)) (point)))))
353 (select-window selected))))
354
355 (defun gnus-get-tree-buffer ()
356 "Return the tree buffer properly initialized."
357 (save-excursion
358 (set-buffer (get-buffer-create gnus-tree-buffer))
359 (unless (eq major-mode 'gnus-tree-mode)
360 (gnus-add-current-to-buffer-list)
361 (gnus-tree-mode))
362 (current-buffer)))
363
364 (defun gnus-tree-minimize ()
365 (when (and gnus-tree-minimize-window
366 (not (one-window-p)))
367 (let ((windows 0)
368 tot-win-height)
369 (walk-windows (lambda (window) (incf windows)))
370 (setq tot-win-height
371 (- (frame-height)
372 (* window-min-height (1- windows))
373 2))
374 (let* ((window-min-height 2)
375 (height (count-lines (point-min) (point-max)))
376 (min (max (1- window-min-height) height))
377 (tot (if (numberp gnus-tree-minimize-window)
378 (min gnus-tree-minimize-window min)
379 min))
380 (win (get-buffer-window (current-buffer)))
381 (wh (and win (1- (window-height win)))))
382 (setq tot (min tot tot-win-height))
383 (when (and win
384 (not (eq tot wh)))
385 (let ((selected (selected-window)))
386 (select-window win)
387 (enlarge-window (- tot wh))
388 (select-window selected)))))))
389
390 ;;; Generating the tree.
391
392 (defun gnus-tree-node-insert (header sparse &optional adopted)
393 (let* ((dummy (stringp header))
394 (header (if (vectorp header) header
395 (progn
396 (setq header (make-mail-header "*****"))
397 (mail-header-set-number header 0)
398 (mail-header-set-lines header 0)
399 (mail-header-set-chars header 0)
400 header)))
401 (gnus-tmp-from (mail-header-from header))
402 (gnus-tmp-subject (mail-header-subject header))
403 (gnus-tmp-number (mail-header-number header))
404 (gnus-tmp-name
405 (cond
406 ((string-match "(.+)" gnus-tmp-from)
407 (substring gnus-tmp-from
408 (1+ (match-beginning 0)) (1- (match-end 0))))
409 ((string-match "<[^>]+> *$" gnus-tmp-from)
410 (let ((beg (match-beginning 0)))
411 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
412 (substring gnus-tmp-from (1+ (match-beginning 0))
413 (1- (match-end 0))))
414 (substring gnus-tmp-from 0 beg))))
415 ((memq gnus-tmp-number sparse)
416 "***")
417 (t gnus-tmp-from)))
418 (gnus-tmp-open-bracket
419 (cond ((memq gnus-tmp-number sparse)
420 (caadr gnus-tree-brackets))
421 (dummy (caaddr gnus-tree-brackets))
422 (adopted (car (nth 3 gnus-tree-brackets)))
423 (t (caar gnus-tree-brackets))))
424 (gnus-tmp-close-bracket
425 (cond ((memq gnus-tmp-number sparse)
426 (cdadr gnus-tree-brackets))
427 (adopted (cdr (nth 3 gnus-tree-brackets)))
428 (dummy
429 (cdaddr gnus-tree-brackets))
430 (t (cdar gnus-tree-brackets))))
431 (buffer-read-only nil)
432 beg end)
433 (gnus-add-text-properties
434 (setq beg (point))
435 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
436 (list 'gnus-number gnus-tmp-number))
437 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
438 (gnus-tree-highlight-node gnus-tmp-number beg end))))
439
440 (defun gnus-tree-highlight-node (article beg end)
441 "Highlight current line according to `gnus-summary-highlight'."
442 (let ((list gnus-summary-highlight)
443 face)
444 (save-excursion
445 (set-buffer gnus-summary-buffer)
446 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
447 gnus-summary-default-score 0))
448 (default gnus-summary-default-score)
449 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
450 ;; Eval the cars of the lists until we find a match.
451 (while (and list
452 (not (eval (caar list))))
453 (setq list (cdr list)))))
454 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
455 (gnus-put-text-property
456 beg end 'face
457 (if (boundp face) (symbol-value face) face)))))
458
459 (defun gnus-tree-indent (level)
460 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
461
462 (defvar gnus-tmp-limit)
463 (defvar gnus-tmp-sparse)
464 (defvar gnus-tmp-indent)
465
466 (defun gnus-generate-tree (thread)
467 "Generate a thread tree for THREAD."
468 (save-excursion
469 (set-buffer (gnus-get-tree-buffer))
470 (let ((buffer-read-only nil)
471 (gnus-tmp-indent 0))
472 (erase-buffer)
473 (funcall gnus-generate-tree-function thread 0)
474 (gnus-set-mode-line 'tree)
475 (goto-char (point-min))
476 (gnus-tree-minimize)
477 (gnus-tree-recenter)
478 (let ((selected (selected-window)))
479 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
480 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
481 (gnus-horizontal-recenter)
482 (select-window selected))))))
483
484 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
485 "Generate a horizontal tree."
486 (let* ((dummy (stringp (car thread)))
487 (do (or dummy
488 (memq (mail-header-number (car thread)) gnus-tmp-limit)))
489 col beg)
490 (if (not do)
491 ;; We don't want this article.
492 (setq thread (cdr thread))
493 (if (not (bolp))
494 ;; Not the first article on the line, so we insert a "-".
495 (insert (car gnus-tree-parent-child-edges))
496 ;; If the level isn't zero, then we insert some indentation.
497 (unless (zerop level)
498 (gnus-tree-indent level)
499 (insert (cadr gnus-tree-parent-child-edges))
500 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
501 ;; Draw "|" lines upwards.
502 (while (progn
503 (forward-line -1)
504 (forward-char col)
505 (= (following-char) ? ))
506 (delete-char 1)
507 (insert (caddr gnus-tree-parent-child-edges)))
508 (goto-char beg)))
509 (setq dummyp nil)
510 ;; Insert the article node.
511 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
512 (if (null thread)
513 ;; End of the thread, so we go to the next line.
514 (unless (bolp)
515 (insert "\n"))
516 ;; Recurse downwards in all children of this article.
517 (while thread
518 (gnus-generate-horizontal-tree
519 (pop thread) (if do (1+ level) level)
520 (or dummyp dummy) dummy)))))
521
522 (defsubst gnus-tree-indent-vertical ()
523 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
524 (- (point) (gnus-point-at-bol)))))
525 (when (> len 0)
526 (insert (make-string len ? )))))
527
528 (defsubst gnus-tree-forward-line (n)
529 (while (>= (decf n) 0)
530 (unless (zerop (forward-line 1))
531 (end-of-line)
532 (insert "\n")))
533 (end-of-line))
534
535 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
536 "Generate a vertical tree."
537 (let* ((dummy (stringp (car thread)))
538 (do (or dummy
539 (memq (mail-header-number (car thread)) gnus-tmp-limit)))
540 beg)
541 (if (not do)
542 ;; We don't want this article.
543 (setq thread (cdr thread))
544 (if (not (save-excursion (beginning-of-line) (bobp)))
545 ;; Not the first article on the line, so we insert a "-".
546 (progn
547 (gnus-tree-indent-vertical)
548 (insert (make-string (/ gnus-tree-node-length 2) ? ))
549 (insert (caddr gnus-tree-parent-child-edges))
550 (gnus-tree-forward-line 1))
551 ;; If the level isn't zero, then we insert some indentation.
552 (unless (zerop gnus-tmp-indent)
553 (gnus-tree-forward-line (1- (* 2 level)))
554 (gnus-tree-indent-vertical)
555 (delete-char -1)
556 (insert (cadr gnus-tree-parent-child-edges))
557 (setq beg (point))
558 ;; Draw "-" lines leftwards.
559 (while (progn
560 (forward-char -2)
561 (= (following-char) ? ))
562 (delete-char 1)
563 (insert (car gnus-tree-parent-child-edges)))
564 (goto-char beg)
565 (gnus-tree-forward-line 1)))
566 (setq dummyp nil)
567 ;; Insert the article node.
568 (gnus-tree-indent-vertical)
569 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
570 (gnus-tree-forward-line 1))
571 (if (null thread)
572 ;; End of the thread, so we go to the next line.
573 (progn
574 (goto-char (point-min))
575 (end-of-line)
576 (incf gnus-tmp-indent))
577 ;; Recurse downwards in all children of this article.
578 (while thread
579 (gnus-generate-vertical-tree
580 (pop thread) (if do (1+ level) level)
581 (or dummyp dummy) dummy)))))
582
583 ;;; Interface functions.
584
585 (defun gnus-possibly-generate-tree (article &optional force)
586 "Generate the thread tree for ARTICLE if it isn't displayed already."
587 (when (save-excursion
588 (set-buffer gnus-summary-buffer)
589 (and gnus-use-trees
590 (vectorp (gnus-summary-article-header article))))
591 (save-excursion
592 (let ((top (save-excursion
593 (set-buffer gnus-summary-buffer)
594 (gnus-cut-thread
595 (gnus-remove-thread
596 (mail-header-id
597 (gnus-summary-article-header article)) t))))
598 (gnus-tmp-limit gnus-newsgroup-limit)
599 (gnus-tmp-sparse gnus-newsgroup-sparse))
600 (when (or force
601 (not (eq top gnus-tree-displayed-thread)))
602 (gnus-generate-tree top)
603 (setq gnus-tree-displayed-thread top))))))
604
605 (defun gnus-tree-open (group)
606 (gnus-get-tree-buffer))
607
608 (defun gnus-tree-close (group)
609 ;(gnus-kill-buffer gnus-tree-buffer)
610 )
611
612 (defun gnus-highlight-selected-tree (article)
613 "Highlight the selected article in the tree."
614 (let ((buf (current-buffer))
615 region)
616 (set-buffer gnus-tree-buffer)
617 (when (setq region (gnus-tree-article-region article))
618 (when (or (not gnus-selected-tree-overlay)
619 (gnus-extent-detached-p gnus-selected-tree-overlay))
620 ;; Create a new overlay.
621 (gnus-overlay-put
622 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
623 'face gnus-selected-tree-face))
624 ;; Move the overlay to the article.
625 (gnus-move-overlay
626 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
627 (gnus-tree-minimize)
628 (gnus-tree-recenter)
629 (let ((selected (selected-window)))
630 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
631 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
632 (gnus-horizontal-recenter)
633 (select-window selected))))
634 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
635 (save-excursion
636 (set-buffer gnus-tree-buffer)
637 (gnus-set-mode-line 'tree))
638 (set-buffer buf)))
639
640 (defun gnus-tree-highlight-article (article face)
641 (save-excursion
642 (set-buffer (gnus-get-tree-buffer))
643 (let (region)
644 (when (setq region (gnus-tree-article-region article))
645 (gnus-put-text-property (car region) (cdr region) 'face face)
646 (set-window-point
647 (get-buffer-window (current-buffer) t) (cdr region))))))
648
649 ;;; Allow redefinition of functions.
650 (gnus-ems-redefine)
651
652 (provide 'gnus-salt)
653
654 ;;; gnus-salt.el ends here