1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2 ;; Copyright (C) 1996 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
6 ;; This file is part of GNU Emacs.
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)
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.
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.
28 (eval-when-compile (require 'cl))
34 (defvar gnus-pick-mode nil
35 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
37 (defvar gnus-pick-display-summary nil
38 "*Display summary while reading.")
40 (defvar gnus-pick-mode-hook nil
41 "Hook run in summary pick mode buffers.")
43 ;;; Internal variables.
45 (defvar gnus-pick-mode-map nil)
47 (unless gnus-pick-mode-map
48 (setq gnus-pick-mode-map (make-sparse-keymap))
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
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))
66 (defun gnus-pick-make-menu-bar ()
67 (unless (boundp 'gnus-pick-menu)
69 gnus-pick-menu gnus-pick-mode-map ""
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])
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]))))
86 (defun gnus-pick-mode (&optional arg)
87 "Minor mode for providing a pick-and-read interface in Gnus summary buffers."
89 (when (eq major-mode 'gnus-summary-mode)
90 (make-local-variable 'gnus-pick-mode)
92 (if (null arg) (not gnus-pick-mode)
93 (> (prefix-numeric-value arg) 0)))
95 ;; Make sure that we don't select any articles upon group entry.
96 (make-local-variable 'gnus-auto-select-first)
97 (setq gnus-auto-select-first nil)
99 (when (and menu-bar-mode
100 (gnus-visual-p 'pick-menu 'menu))
101 (gnus-pick-make-menu-bar))
102 (unless (assq 'gnus-pick-mode minor-mode-alist)
103 (push '(gnus-pick-mode " Pick") minor-mode-alist))
104 (unless (assq 'gnus-pick-mode minor-mode-map-alist)
105 (push (cons 'gnus-pick-mode gnus-pick-mode-map)
106 minor-mode-map-alist))
107 (run-hooks 'gnus-pick-mode-hook))))
109 (defun gnus-pick-start-reading (&optional catch-up)
110 "Start reading the picked articles.
111 If given a prefix, mark all unpicked articles as read."
113 (unless gnus-newsgroup-processable
114 (error "No articles have been picked"))
115 (gnus-summary-limit-to-articles nil)
117 (gnus-summary-limit-mark-excluded-as-read))
118 (gnus-configure-windows (if gnus-pick-display-summary 'summary 'pick) t))
125 (defvar gnus-binary-mode nil
126 "Minor mode for provind a binary group interface in Gnus summary buffers.")
128 (defvar gnus-binary-mode-hook nil
129 "Hook run in summary binary mode buffers.")
131 (defvar gnus-binary-mode-map nil)
133 (unless gnus-binary-mode-map
134 (setq gnus-binary-mode-map (make-sparse-keymap))
138 "g" gnus-binary-show-article))
140 (defun gnus-binary-make-menu-bar ()
141 (unless (boundp 'gnus-binary-menu)
143 gnus-binary-menu gnus-binary-mode-map ""
145 ["Switch binary mode off" gnus-binary-mode t]))))
147 (defun gnus-binary-mode (&optional arg)
148 "Minor mode for providing a binary group interface in Gnus summary buffers."
150 (when (eq major-mode 'gnus-summary-mode)
151 (make-local-variable 'gnus-binary-mode)
152 (setq gnus-binary-mode
153 (if (null arg) (not gnus-binary-mode)
154 (> (prefix-numeric-value arg) 0)))
155 (when gnus-binary-mode
156 ;; Make sure that we don't select any articles upon group entry.
157 (make-local-variable 'gnus-auto-select-first)
158 (setq gnus-auto-select-first nil)
159 (make-local-variable 'gnus-summary-display-article-function)
160 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
162 (when (and menu-bar-mode
163 (gnus-visual-p 'binary-menu 'menu))
164 (gnus-binary-make-menu-bar))
165 (unless (assq 'gnus-binary-mode minor-mode-alist)
166 (push '(gnus-binary-mode " Binary") minor-mode-alist))
167 (unless (assq 'gnus-topic-mode minor-mode-map-alist)
168 (push (cons 'gnus-topic-mode gnus-binary-mode-map)
169 minor-mode-map-alist))
170 (run-hooks 'gnus-binary-mode-hook))))
172 (defun gnus-binary-display-article (article &optional all-header)
173 "Run ARTICLE through the binary decode functions."
174 (when (gnus-summary-goto-subject article)
175 (let ((gnus-view-pseudos 'automatic))
176 (gnus-uu-decode-uu))))
178 (defun gnus-binary-show-article (&optional arg)
179 "Bypass the binary functions and show the article."
181 (let (gnus-summary-display-article-function)
182 (gnus-summary-show-article arg)))
188 (defvar gnus-tree-line-format "%(%[%3,3n%]%)"
189 "Format of tree elements.")
191 (defvar gnus-tree-minimize-window t
192 "If non-nil, minimize the tree buffer window.
193 If a number, never let the tree buffer grow taller than that number of
196 (defvar gnus-selected-tree-face 'modeline
197 "*Face used for highlighting selected articles in the thread tree.")
199 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
200 (?\{ . ?\}) (?< . ?>))
201 "Brackets used in tree nodes.")
203 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
204 "Charaters used to connect parents with children.")
206 (defvar gnus-tree-mode-line-format "Gnus: %%b %S %Z"
207 "*The format specification for the tree mode line.")
209 (defvar gnus-generate-tree-function 'gnus-generate-vertical-tree
210 "*Function for generating a thread tree.
211 Two predefined functions are available:
212 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'.")
214 (defvar gnus-tree-mode-hook nil
215 "*Hook run in tree mode buffers.")
217 ;;; Internal variables.
219 (defvar gnus-tree-line-format-alist
220 `((?n gnus-tmp-name ?s)
221 (?f gnus-tmp-from ?s)
222 (?N gnus-tmp-number ?d)
223 (?\[ gnus-tmp-open-bracket ?c)
224 (?\] gnus-tmp-close-bracket ?c)
225 (?s gnus-tmp-subject ?s)))
227 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
229 (defvar gnus-tree-mode-line-format-spec nil)
230 (defvar gnus-tree-line-format-spec nil)
232 (defvar gnus-tree-node-length nil)
233 (defvar gnus-selected-tree-overlay nil)
235 (defvar gnus-tree-displayed-thread nil)
237 (defvar gnus-tree-mode-map nil)
238 (put 'gnus-tree-mode 'mode-class 'special)
240 (unless gnus-tree-mode-map
241 (setq gnus-tree-mode-map (make-keymap))
242 (suppress-keymap gnus-tree-mode-map)
245 "\r" gnus-tree-select-article
246 gnus-mouse-2 gnus-tree-pick-article
247 "\C-?" gnus-tree-read-summary-keys)
249 (substitute-key-definition
250 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
252 (defun gnus-tree-make-menu-bar ()
253 (unless (boundp 'gnus-tree-menu)
255 gnus-tree-menu gnus-tree-mode-map ""
257 ["Select article" gnus-tree-select-article t]))))
259 (defun gnus-tree-mode ()
260 "Major mode for displaying thread trees."
262 (setq gnus-tree-mode-line-format-spec
263 (gnus-parse-format gnus-tree-mode-line-format
264 gnus-summary-mode-line-format-alist))
265 (setq gnus-tree-line-format-spec
266 (gnus-parse-format gnus-tree-line-format
267 gnus-tree-line-format-alist t))
268 (when (and menu-bar-mode
269 (gnus-visual-p 'tree-menu 'menu))
270 (gnus-tree-make-menu-bar))
271 (kill-all-local-variables)
272 (gnus-simplify-mode-line)
273 (setq mode-name "Tree")
274 (setq major-mode 'gnus-tree-mode)
275 (use-local-map gnus-tree-mode-map)
276 (buffer-disable-undo (current-buffer))
277 (setq buffer-read-only t)
278 (setq truncate-lines t)
280 (gnus-set-work-buffer)
281 (gnus-tree-node-insert (make-mail-header "") nil)
282 (setq gnus-tree-node-length (1- (point))))
283 (run-hooks 'gnus-tree-mode-hook))
285 (defun gnus-tree-read-summary-keys (&optional arg)
286 "Read a summary buffer key sequence and execute it."
288 (let ((buf (current-buffer))
290 (gnus-article-read-summary-keys arg nil t)
291 (when (setq win (get-buffer-window buf))
293 (when gnus-selected-tree-overlay
294 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
295 (gnus-tree-minimize))))
297 (defun gnus-tree-select-article (article)
298 "Select the article under point, if any."
299 (interactive (list (gnus-tree-article-number)))
300 (let ((buf (current-buffer)))
303 (set-buffer gnus-summary-buffer)
304 (gnus-summary-goto-article article))
305 (select-window (get-buffer-window buf)))))
307 (defun gnus-tree-pick-article (e)
308 "Select the article under the mouse pointer."
311 (gnus-tree-select-article (gnus-tree-article-number)))
313 (defun gnus-tree-article-number ()
314 (get-text-property (point) 'gnus-number))
316 (defun gnus-tree-article-region (article)
317 "Return a cons with BEG and END of the article region."
318 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
320 (cons pos (next-single-property-change pos 'gnus-number)))))
322 (defun gnus-tree-goto-article (article)
323 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
327 (defun gnus-tree-recenter ()
328 "Center point in the tree window."
329 (let ((selected (selected-window))
330 (tree-window (get-buffer-window gnus-tree-buffer t)))
332 (select-window tree-window)
333 (when gnus-selected-tree-overlay
334 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
335 (let* ((top (cond ((< (window-height) 4) 0)
336 ((< (window-height) 7) 1)
338 (height (1- (window-height)))
339 (bottom (save-excursion (goto-char (point-max))
340 (forward-line (- height))
342 ;; Set the window start to either `bottom', which is the biggest
343 ;; possible valid number, or the second line from the top,
344 ;; whichever is the least.
346 tree-window (min bottom (save-excursion
347 (forward-line (- top)) (point)))))
348 (select-window selected))))
350 (defun gnus-get-tree-buffer ()
351 "Return the tree buffer properly initialized."
353 (set-buffer (get-buffer-create gnus-tree-buffer))
354 (unless (eq major-mode 'gnus-tree-mode)
355 (gnus-add-current-to-buffer-list)
359 (defun gnus-tree-minimize ()
360 (when (and gnus-tree-minimize-window
361 (not (one-window-p)))
362 (let* ((window-min-height 2)
363 (height (count-lines (point-min) (point-max)))
364 (min (max (1- window-min-height) height))
365 (tot (if (numberp gnus-tree-minimize-window)
366 (min gnus-tree-minimize-window min)
368 (win (get-buffer-window (current-buffer)))
369 (wh (and win (1- (window-height win)))))
372 (let ((selected (selected-window)))
374 (enlarge-window (- tot wh))
375 (select-window selected))))))
377 ;;; Generating the tree.
379 (defun gnus-tree-node-insert (header sparse &optional adopted)
380 (let* ((dummy (stringp header))
381 (header (if (vectorp header) header
383 (setq header (make-mail-header "*****"))
384 (mail-header-set-number header 0)
385 (mail-header-set-lines header 0)
386 (mail-header-set-chars header 0)
388 (gnus-tmp-from (mail-header-from header))
389 (gnus-tmp-subject (mail-header-subject header))
390 (gnus-tmp-number (mail-header-number header))
393 ((string-match "(.+)" gnus-tmp-from)
394 (substring gnus-tmp-from
395 (1+ (match-beginning 0)) (1- (match-end 0))))
396 ((string-match "<[^>]+> *$" gnus-tmp-from)
397 (let ((beg (match-beginning 0)))
398 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
399 (substring gnus-tmp-from (1+ (match-beginning 0))
401 (substring gnus-tmp-from 0 beg))))
402 ((memq gnus-tmp-number sparse)
405 (gnus-tmp-open-bracket
406 (cond ((memq gnus-tmp-number sparse)
407 (caadr gnus-tree-brackets))
408 (dummy (caaddr gnus-tree-brackets))
409 (adopted (car (nth 3 gnus-tree-brackets)))
410 (t (caar gnus-tree-brackets))))
411 (gnus-tmp-close-bracket
412 (cond ((memq gnus-tmp-number sparse)
413 (cdadr gnus-tree-brackets))
414 (adopted (cdr (nth 3 gnus-tree-brackets)))
416 (cdaddr gnus-tree-brackets))
417 (t (cdar gnus-tree-brackets))))
418 (buffer-read-only nil)
420 (gnus-add-text-properties
422 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
423 (list 'gnus-number gnus-tmp-number))
424 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
425 (gnus-tree-highlight-node gnus-tmp-number beg end))))
427 (defun gnus-tree-highlight-node (article beg end)
428 "Highlight current line according to `gnus-summary-highlight'."
429 (let ((list gnus-summary-highlight)
432 (set-buffer gnus-summary-buffer)
433 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
434 gnus-summary-default-score 0))
435 (default gnus-summary-default-score)
436 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
437 ;; Eval the cars of the lists until we find a match.
439 (not (eval (caar list))))
440 (setq list (cdr list)))))
441 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
442 (gnus-put-text-property
444 (if (boundp face) (symbol-value face) face)))))
446 (defun gnus-tree-indent (level)
447 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
449 (defvar gnus-tmp-limit)
450 (defvar gnus-tmp-sparse)
451 (defvar gnus-tmp-indent)
453 (defun gnus-generate-tree (thread)
454 "Generate a thread tree for THREAD."
456 (set-buffer (gnus-get-tree-buffer))
457 (let ((buffer-read-only nil)
460 (funcall gnus-generate-tree-function thread 0)
461 (gnus-set-mode-line 'tree)
462 (goto-char (point-min))
465 (let ((selected (selected-window)))
466 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
467 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
468 (gnus-horizontal-recenter)
469 (select-window selected))))))
471 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
472 "Generate a horizontal tree."
473 (let* ((dummy (stringp (car thread)))
475 (memq (mail-header-number (car thread)) gnus-tmp-limit)))
478 ;; We don't want this article.
479 (setq thread (cdr thread))
481 ;; Not the first article on the line, so we insert a "-".
482 (insert (car gnus-tree-parent-child-edges))
483 ;; If the level isn't zero, then we insert some indentation.
484 (unless (zerop level)
485 (gnus-tree-indent level)
486 (insert (cadr gnus-tree-parent-child-edges))
487 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
488 ;; Draw "|" lines upwards.
492 (= (following-char) ? ))
494 (insert (caddr gnus-tree-parent-child-edges)))
497 ;; Insert the article node.
498 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
500 ;; End of the thread, so we go to the next line.
503 ;; Recurse downwards in all children of this article.
505 (gnus-generate-horizontal-tree
506 (pop thread) (if do (1+ level) level)
507 (or dummyp dummy) dummy)))))
509 (defsubst gnus-tree-indent-vertical ()
510 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
511 (- (point) (gnus-point-at-bol)))))
513 (insert (make-string len ? )))))
515 (defsubst gnus-tree-forward-line (n)
516 (while (>= (decf n) 0)
517 (unless (zerop (forward-line 1))
522 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
523 "Generate a vertical tree."
524 (let* ((dummy (stringp (car thread)))
526 (memq (mail-header-number (car thread)) gnus-tmp-limit)))
529 ;; We don't want this article.
530 (setq thread (cdr thread))
531 (if (not (save-excursion (beginning-of-line) (bobp)))
532 ;; Not the first article on the line, so we insert a "-".
534 (gnus-tree-indent-vertical)
535 (insert (make-string (/ gnus-tree-node-length 2) ? ))
536 (insert (caddr gnus-tree-parent-child-edges))
537 (gnus-tree-forward-line 1))
538 ;; If the level isn't zero, then we insert some indentation.
539 (unless (zerop gnus-tmp-indent)
540 (gnus-tree-forward-line (1- (* 2 level)))
541 (gnus-tree-indent-vertical)
543 (insert (cadr gnus-tree-parent-child-edges))
545 ;; Draw "-" lines leftwards.
548 (= (following-char) ? ))
550 (insert (car gnus-tree-parent-child-edges)))
552 (gnus-tree-forward-line 1)))
554 ;; Insert the article node.
555 (gnus-tree-indent-vertical)
556 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
557 (gnus-tree-forward-line 1))
559 ;; End of the thread, so we go to the next line.
561 (goto-char (point-min))
563 (incf gnus-tmp-indent))
564 ;; Recurse downwards in all children of this article.
566 (gnus-generate-vertical-tree
567 (pop thread) (if do (1+ level) level)
568 (or dummyp dummy) dummy)))))
570 ;;; Interface functions.
572 (defun gnus-possibly-generate-tree (article &optional force)
573 "Generate the thread tree for ARTICLE if it isn't displayed already."
574 (when (save-excursion
575 (set-buffer gnus-summary-buffer)
577 (vectorp (gnus-summary-article-header article))))
579 (let ((top (save-excursion
580 (set-buffer gnus-summary-buffer)
584 (gnus-summary-article-header article)) t))))
585 (gnus-tmp-limit gnus-newsgroup-limit)
586 (gnus-tmp-sparse gnus-newsgroup-sparse))
588 (not (eq top gnus-tree-displayed-thread)))
589 (gnus-generate-tree top)
590 (setq gnus-tree-displayed-thread top))))))
592 (defun gnus-tree-open (group)
593 (gnus-get-tree-buffer))
595 (defun gnus-tree-close (group)
596 ;(gnus-kill-buffer gnus-tree-buffer)
599 (defun gnus-highlight-selected-tree (article)
600 "Highlight the selected article in the tree."
601 (let ((buf (current-buffer))
603 (set-buffer gnus-tree-buffer)
604 (when (setq region (gnus-tree-article-region article))
605 (when (or (not gnus-selected-tree-overlay)
606 (gnus-extent-detached-p gnus-selected-tree-overlay))
607 ;; Create a new overlay.
609 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
610 'face gnus-selected-tree-face))
611 ;; Move the overlay to the article.
613 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
616 (let ((selected (selected-window)))
617 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
618 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
619 (gnus-horizontal-recenter)
620 (select-window selected))))
621 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
623 (set-buffer gnus-tree-buffer)
624 (gnus-set-mode-line 'tree))
627 (defun gnus-tree-highlight-article (article face)
629 (set-buffer (gnus-get-tree-buffer))
631 (when (setq region (gnus-tree-article-region article))
632 (gnus-put-text-property (car region) (cdr region) 'face face)
634 (get-buffer-window (current-buffer) t) (cdr region))))))
636 ;;; Allow redefinition of functions.
641 ;;; gnus-salt.el ends here