1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2 ;; Copyright (C) 1996,97 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.
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 (defvar gnus-mark-unpicked-articles-as-read nil
44 "*If non-nil, mark all unpicked articles as read.")
46 (defvar gnus-pick-elegant-flow t
47 "If non-nil, gnus-pick-start-reading will run gnus-summary-next-group when no articles have been picked.")
49 (defvar gnus-summary-pick-line-format
50 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
51 "*The format specification of the lines in pick buffers.
52 It accepts the same format specs that `gnus-summary-line-format' does.")
54 ;;; Internal variables.
56 (defvar gnus-pick-mode-map nil)
58 (unless gnus-pick-mode-map
59 (setq gnus-pick-mode-map (make-sparse-keymap))
63 "t" gnus-uu-mark-thread
64 "T" gnus-uu-unmark-thread
65 " " gnus-pick-next-page
66 "u" gnus-summary-unmark-as-processable
67 "U" gnus-summary-unmark-all-processable
69 "r" gnus-uu-mark-region
70 "R" gnus-uu-unmark-region
71 "e" gnus-uu-mark-by-regexp
72 "E" gnus-uu-mark-by-regexp
73 "b" gnus-uu-mark-buffer
74 "B" gnus-uu-unmark-buffer
76 gnus-down-mouse-2 gnus-pick-mouse-pick-region
77 ;;gnus-mouse-2 gnus-pick-mouse-pick
78 "X" gnus-pick-start-reading
79 "\r" gnus-pick-start-reading))
81 (defun gnus-pick-make-menu-bar ()
82 (unless (boundp 'gnus-pick-menu)
84 gnus-pick-menu gnus-pick-mode-map ""
87 ["Article" gnus-summary-mark-as-processable t]
88 ["Thread" gnus-uu-mark-thread t]
89 ["Region" gnus-uu-mark-region t]
90 ["Regexp" gnus-uu-mark-regexp t]
91 ["Buffer" gnus-uu-mark-buffer t])
93 ["Article" gnus-summary-unmark-as-processable t]
94 ["Thread" gnus-uu-unmark-thread t]
95 ["Region" gnus-uu-unmark-region t]
96 ["Regexp" gnus-uu-unmark-regexp t]
97 ["Buffer" gnus-uu-unmark-buffer t])
98 ["Start reading" gnus-pick-start-reading t]
99 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
101 (defun gnus-pick-mode (&optional arg)
102 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
104 \\{gnus-pick-mode-map}"
106 (when (eq major-mode 'gnus-summary-mode)
107 (when (set (make-local-variable 'gnus-pick-mode)
108 (if (null arg) (not gnus-pick-mode)
109 (> (prefix-numeric-value arg) 0)))
110 ;; Make sure that we don't select any articles upon group entry.
111 (set (make-local-variable 'gnus-auto-select-first) nil)
112 ;; Change line format.
113 (setq gnus-summary-line-format gnus-summary-pick-line-format)
114 (setq gnus-summary-line-format-spec nil)
115 (gnus-update-format-specifications nil 'summary)
116 (gnus-update-summary-mark-positions)
117 (set (make-local-variable 'gnus-summary-goto-unread) 'never)
119 (when (gnus-visual-p 'pick-menu 'menu)
120 (gnus-pick-make-menu-bar))
121 (unless (assq 'gnus-pick-mode minor-mode-alist)
122 (push '(gnus-pick-mode " Pick") minor-mode-alist))
123 (unless (assq 'gnus-pick-mode minor-mode-map-alist)
124 (push (cons 'gnus-pick-mode gnus-pick-mode-map)
125 minor-mode-map-alist))
126 (run-hooks 'gnus-pick-mode-hook))))
128 (defvar gnus-pick-line-number 1)
129 (defun gnus-pick-line-number ()
130 "Return the current line number."
132 (setq gnus-pick-line-number 1)
133 (incf gnus-pick-line-number)))
135 (defun gnus-pick-start-reading (&optional catch-up)
136 "Start reading the picked articles.
137 If given a prefix, mark all unpicked articles as read."
139 (if gnus-newsgroup-processable
141 (gnus-summary-limit-to-articles nil)
142 (when (or catch-up gnus-mark-unpicked-articles-as-read)
143 (gnus-summary-limit-mark-excluded-as-read))
144 (gnus-summary-first-article)
145 (gnus-configure-windows
146 (if gnus-pick-display-summary 'article 'pick) t))
147 (if gnus-pick-elegant-flow
149 (when (or catch-up gnus-mark-unpicked-articles-as-read)
150 (gnus-summary-limit-mark-excluded-as-read))
151 (if (gnus-group-quit-config gnus-newsgroup-name)
153 (gnus-summary-next-group)))
154 (error "No articles have been picked"))))
156 (defun gnus-pick-article (&optional arg)
157 "Pick the article on the current line.
158 If ARG, pick the article on that line instead."
163 (goto-char (point-min))
164 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
167 (gnus-error 2 "No such line: %s" arg)
169 (gnus-summary-mark-as-processable 1))
171 (defun gnus-pick-mouse-pick (e)
175 (gnus-summary-mark-as-processable 1)))
177 (defun gnus-pick-mouse-pick-region (start-event)
178 "Pick articles that the mouse is dragged over.
179 This must be bound to a button-down mouse event."
181 (mouse-minibuffer-check start-event)
182 (let* ((echo-keystrokes 0)
183 (start-posn (event-start start-event))
184 (start-point (posn-point start-posn))
185 (start-line (1+ (count-lines 1 start-point)))
186 (start-window (posn-window start-posn))
187 (start-frame (window-frame start-window))
188 (bounds (window-edges start-window))
190 (bottom (if (window-minibuffer-p start-window)
192 ;; Don't count the mode line.
193 (1- (nth 3 bounds))))
194 (click-count (1- (event-click-count start-event))))
195 (setq mouse-selection-click-count click-count)
196 (setq mouse-selection-click-count-buffer (current-buffer))
197 (mouse-set-point start-event)
198 ;; In case the down click is in the middle of some intangible text,
199 ;; use the end of that text, and put it in START-POINT.
200 (when (< (point) start-point)
201 (goto-char start-point))
203 (setq start-point (point))
204 ;; end-of-range is used only in the single-click case.
205 ;; It is the place where the drag has reached so far
206 ;; (but not outside the window where the drag started).
207 (let (event end end-point last-end-point (end-of-range (point)))
210 (setq event (read-event))
211 (or (mouse-movement-p event)
212 (eq (car-safe event) 'switch-frame)))
213 (if (eq (car-safe event) 'switch-frame)
215 (setq end (event-end event)
216 end-point (posn-point end))
218 (setq last-end-point end-point))
221 ;; Are we moving within the original window?
222 ((and (eq (posn-window end) start-window)
223 (integer-or-marker-p end-point))
224 ;; Go to START-POINT first, so that when we move to END-POINT,
225 ;; if it's in the middle of intangible text,
226 ;; point jumps in the direction away from START-POINT.
227 (goto-char start-point)
228 (goto-char end-point)
230 ;; In case the user moved his mouse really fast, pick
231 ;; articles on the line between this one and the last one.
232 (let* ((this-line (1+ (count-lines 1 end-point)))
233 (min-line (min this-line start-line))
234 (max-line (max this-line start-line)))
235 (while (< min-line max-line)
238 (setq min-line (1+ min-line)))
239 (setq start-line this-line))
240 (when (zerop (% click-count 3))
241 (setq end-of-range (point))))
243 (let ((mouse-row (cdr (cdr (mouse-position)))))
247 (mouse-scroll-subr start-window (- mouse-row top)))
248 ((>= mouse-row bottom)
249 (mouse-scroll-subr start-window
250 (1+ (- mouse-row bottom)))))))))))
252 (let ((fun (key-binding (vector (car event)))))
253 ;; Run the binding of the terminating up-event, if possible.
254 ;; In the case of a multiple click, it gives the wrong results,
255 ;; because it would fail to set up a region.
257 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
258 ;; In this case, we can just let the up-event execute normally.
259 (let ((end (event-end event)))
260 ;; Set the position in the event before we replay it,
261 ;; because otherwise it may have a position in the wrong
263 (setcar (cdr end) end-of-range)
264 ;; Delete the overlay before calling the function,
265 ;; because delete-overlay increases buffer-modified-tick.
266 (push event unread-command-events))))))))
268 (defun gnus-pick-next-page ()
269 "Go to the next page. If at the end of the buffer, start reading articles."
271 (let ((scroll-in-place nil))
274 (end-of-buffer (gnus-pick-start-reading)))))
280 (defvar gnus-binary-mode nil
281 "Minor mode for providing a binary group interface in Gnus summary buffers.")
283 (defvar gnus-binary-mode-hook nil
284 "Hook run in summary binary mode buffers.")
286 (defvar gnus-binary-mode-map nil)
288 (unless gnus-binary-mode-map
289 (setq gnus-binary-mode-map (make-sparse-keymap))
293 "g" gnus-binary-show-article))
295 (defun gnus-binary-make-menu-bar ()
296 (unless (boundp 'gnus-binary-menu)
298 gnus-binary-menu gnus-binary-mode-map ""
300 ["Switch binary mode off" gnus-binary-mode t]))))
302 (defun gnus-binary-mode (&optional arg)
303 "Minor mode for providing a binary group interface in Gnus summary buffers."
305 (when (eq major-mode 'gnus-summary-mode)
306 (make-local-variable 'gnus-binary-mode)
307 (setq gnus-binary-mode
308 (if (null arg) (not gnus-binary-mode)
309 (> (prefix-numeric-value arg) 0)))
310 (when gnus-binary-mode
311 ;; Make sure that we don't select any articles upon group entry.
312 (make-local-variable 'gnus-auto-select-first)
313 (setq gnus-auto-select-first nil)
314 (make-local-variable 'gnus-summary-display-article-function)
315 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
317 (when (gnus-visual-p 'binary-menu 'menu)
318 (gnus-binary-make-menu-bar))
319 (unless (assq 'gnus-binary-mode minor-mode-alist)
320 (push '(gnus-binary-mode " Binary") minor-mode-alist))
321 (unless (assq 'gnus-binary-mode minor-mode-map-alist)
322 (push (cons 'gnus-binary-mode gnus-binary-mode-map)
323 minor-mode-map-alist))
324 (run-hooks 'gnus-binary-mode-hook))))
326 (defun gnus-binary-display-article (article &optional all-header)
327 "Run ARTICLE through the binary decode functions."
328 (when (gnus-summary-goto-subject article)
329 (let ((gnus-view-pseudos 'automatic))
330 (gnus-uu-decode-uu))))
332 (defun gnus-binary-show-article (&optional arg)
333 "Bypass the binary functions and show the article."
335 (let (gnus-summary-display-article-function)
336 (gnus-summary-show-article arg)))
342 (defvar gnus-tree-line-format "%(%[%3,3n%]%)"
343 "Format of tree elements.")
345 (defvar gnus-tree-minimize-window t
346 "If non-nil, minimize the tree buffer window.
347 If a number, never let the tree buffer grow taller than that number of
350 (defvar gnus-selected-tree-face 'modeline
351 "*Face used for highlighting selected articles in the thread tree.")
353 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
354 (?\{ . ?\}) (?< . ?>))
355 "Brackets used in tree nodes.")
357 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
358 "Characters used to connect parents with children.")
360 (defvar gnus-tree-mode-line-format "Gnus: %%b %S %Z"
361 "*The format specification for the tree mode line.")
363 (defvar gnus-generate-tree-function 'gnus-generate-vertical-tree
364 "*Function for generating a thread tree.
365 Two predefined functions are available:
366 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'.")
368 (defvar gnus-tree-mode-hook nil
369 "*Hook run in tree mode buffers.")
371 ;;; Internal variables.
373 (defvar gnus-tree-line-format-alist
374 `((?n gnus-tmp-name ?s)
375 (?f gnus-tmp-from ?s)
376 (?N gnus-tmp-number ?d)
377 (?\[ gnus-tmp-open-bracket ?c)
378 (?\] gnus-tmp-close-bracket ?c)
379 (?s gnus-tmp-subject ?s)))
381 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
383 (defvar gnus-tree-mode-line-format-spec nil)
384 (defvar gnus-tree-line-format-spec nil)
386 (defvar gnus-tree-node-length nil)
387 (defvar gnus-selected-tree-overlay nil)
389 (defvar gnus-tree-displayed-thread nil)
391 (defvar gnus-tree-mode-map nil)
392 (put 'gnus-tree-mode 'mode-class 'special)
394 (unless gnus-tree-mode-map
395 (setq gnus-tree-mode-map (make-keymap))
396 (suppress-keymap gnus-tree-mode-map)
399 "\r" gnus-tree-select-article
400 gnus-mouse-2 gnus-tree-pick-article
401 "\C-?" gnus-tree-read-summary-keys
403 "\C-c\C-i" gnus-info-find-node)
405 (substitute-key-definition
406 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
408 (defun gnus-tree-make-menu-bar ()
409 (unless (boundp 'gnus-tree-menu)
411 gnus-tree-menu gnus-tree-mode-map ""
413 ["Select article" gnus-tree-select-article t]))))
415 (defun gnus-tree-mode ()
416 "Major mode for displaying thread trees."
418 (setq gnus-tree-mode-line-format-spec
419 (gnus-parse-format gnus-tree-mode-line-format
420 gnus-summary-mode-line-format-alist))
421 (setq gnus-tree-line-format-spec
422 (gnus-parse-format gnus-tree-line-format
423 gnus-tree-line-format-alist t))
424 (when (gnus-visual-p 'tree-menu 'menu)
425 (gnus-tree-make-menu-bar))
426 (kill-all-local-variables)
427 (gnus-simplify-mode-line)
428 (setq mode-name "Tree")
429 (setq major-mode 'gnus-tree-mode)
430 (use-local-map gnus-tree-mode-map)
431 (buffer-disable-undo (current-buffer))
432 (setq buffer-read-only t)
433 (setq truncate-lines t)
435 (gnus-set-work-buffer)
436 (gnus-tree-node-insert (make-mail-header "") nil)
437 (setq gnus-tree-node-length (1- (point))))
438 (run-hooks 'gnus-tree-mode-hook))
440 (defun gnus-tree-read-summary-keys (&optional arg)
441 "Read a summary buffer key sequence and execute it."
443 (let ((buf (current-buffer))
445 (gnus-article-read-summary-keys arg nil t)
446 (when (setq win (get-buffer-window buf))
448 (when gnus-selected-tree-overlay
449 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
450 (gnus-tree-minimize))))
452 (defun gnus-tree-select-article (article)
453 "Select the article under point, if any."
454 (interactive (list (gnus-tree-article-number)))
455 (let ((buf (current-buffer)))
458 (set-buffer gnus-summary-buffer)
459 (gnus-summary-goto-article article))
460 (select-window (get-buffer-window buf)))))
462 (defun gnus-tree-pick-article (e)
463 "Select the article under the mouse pointer."
466 (gnus-tree-select-article (gnus-tree-article-number)))
468 (defun gnus-tree-article-number ()
469 (get-text-property (point) 'gnus-number))
471 (defun gnus-tree-article-region (article)
472 "Return a cons with BEG and END of the article region."
473 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
475 (cons pos (next-single-property-change pos 'gnus-number)))))
477 (defun gnus-tree-goto-article (article)
478 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
482 (defun gnus-tree-recenter ()
483 "Center point in the tree window."
484 (let ((selected (selected-window))
485 (tree-window (get-buffer-window gnus-tree-buffer t)))
487 (select-window tree-window)
488 (when gnus-selected-tree-overlay
489 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
490 (let* ((top (cond ((< (window-height) 4) 0)
491 ((< (window-height) 7) 1)
493 (height (1- (window-height)))
494 (bottom (save-excursion (goto-char (point-max))
495 (forward-line (- height))
497 ;; Set the window start to either `bottom', which is the biggest
498 ;; possible valid number, or the second line from the top,
499 ;; whichever is the least.
501 tree-window (min bottom (save-excursion
502 (forward-line (- top)) (point)))))
503 (select-window selected))))
505 (defun gnus-get-tree-buffer ()
506 "Return the tree buffer properly initialized."
508 (set-buffer (get-buffer-create gnus-tree-buffer))
509 (unless (eq major-mode 'gnus-tree-mode)
510 (gnus-add-current-to-buffer-list)
514 (defun gnus-tree-minimize ()
515 (when (and gnus-tree-minimize-window
516 (not (one-window-p)))
519 (walk-windows (lambda (window) (incf windows)))
522 (* window-min-height (1- windows))
524 (let* ((window-min-height 2)
525 (height (count-lines (point-min) (point-max)))
526 (min (max (1- window-min-height) height))
527 (tot (if (numberp gnus-tree-minimize-window)
528 (min gnus-tree-minimize-window min)
530 (win (get-buffer-window (current-buffer)))
531 (wh (and win (1- (window-height win)))))
532 (setq tot (min tot tot-win-height))
535 (let ((selected (selected-window)))
536 (when (ignore-errors (select-window win))
537 (enlarge-window (- tot wh))
538 (select-window selected))))))))
540 ;;; Generating the tree.
542 (defun gnus-tree-node-insert (header sparse &optional adopted)
543 (let* ((dummy (stringp header))
544 (header (if (vectorp header) header
546 (setq header (make-mail-header "*****"))
547 (mail-header-set-number header 0)
548 (mail-header-set-lines header 0)
549 (mail-header-set-chars header 0)
551 (gnus-tmp-from (mail-header-from header))
552 (gnus-tmp-subject (mail-header-subject header))
553 (gnus-tmp-number (mail-header-number header))
556 ((string-match "(.+)" gnus-tmp-from)
557 (substring gnus-tmp-from
558 (1+ (match-beginning 0)) (1- (match-end 0))))
559 ((string-match "<[^>]+> *$" gnus-tmp-from)
560 (let ((beg (match-beginning 0)))
561 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
562 (substring gnus-tmp-from (1+ (match-beginning 0))
564 (substring gnus-tmp-from 0 beg))))
565 ((memq gnus-tmp-number sparse)
568 (gnus-tmp-open-bracket
569 (cond ((memq gnus-tmp-number sparse)
570 (caadr gnus-tree-brackets))
571 (dummy (caaddr gnus-tree-brackets))
572 (adopted (car (nth 3 gnus-tree-brackets)))
573 (t (caar gnus-tree-brackets))))
574 (gnus-tmp-close-bracket
575 (cond ((memq gnus-tmp-number sparse)
576 (cdadr gnus-tree-brackets))
577 (adopted (cdr (nth 3 gnus-tree-brackets)))
579 (cdaddr gnus-tree-brackets))
580 (t (cdar gnus-tree-brackets))))
581 (buffer-read-only nil)
583 (gnus-add-text-properties
585 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
586 (list 'gnus-number gnus-tmp-number))
587 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
588 (gnus-tree-highlight-node gnus-tmp-number beg end))))
590 (defun gnus-tree-highlight-node (article beg end)
591 "Highlight current line according to `gnus-summary-highlight'."
592 (let ((list gnus-summary-highlight)
595 (set-buffer gnus-summary-buffer)
596 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
597 gnus-summary-default-score 0))
598 (default gnus-summary-default-score)
599 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
600 ;; Eval the cars of the lists until we find a match.
602 (not (eval (caar list))))
603 (setq list (cdr list)))))
604 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
605 (gnus-put-text-property
607 (if (boundp face) (symbol-value face) face)))))
609 (defun gnus-tree-indent (level)
610 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
612 (defvar gnus-tmp-limit)
613 (defvar gnus-tmp-sparse)
614 (defvar gnus-tmp-indent)
616 (defun gnus-generate-tree (thread)
617 "Generate a thread tree for THREAD."
619 (set-buffer (gnus-get-tree-buffer))
620 (let ((buffer-read-only nil)
623 (funcall gnus-generate-tree-function thread 0)
624 (gnus-set-mode-line 'tree)
625 (goto-char (point-min))
628 (let ((selected (selected-window)))
629 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
630 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
631 (gnus-horizontal-recenter)
632 (select-window selected))))))
634 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
635 "Generate a horizontal tree."
636 (let* ((dummy (stringp (car thread)))
638 (memq (mail-header-number (car thread)) gnus-tmp-limit)))
641 ;; We don't want this article.
642 (setq thread (cdr thread))
644 ;; Not the first article on the line, so we insert a "-".
645 (insert (car gnus-tree-parent-child-edges))
646 ;; If the level isn't zero, then we insert some indentation.
647 (unless (zerop level)
648 (gnus-tree-indent level)
649 (insert (cadr gnus-tree-parent-child-edges))
650 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
651 ;; Draw "|" lines upwards.
655 (= (following-char) ? ))
657 (insert (caddr gnus-tree-parent-child-edges)))
660 ;; Insert the article node.
661 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
663 ;; End of the thread, so we go to the next line.
666 ;; Recurse downwards in all children of this article.
668 (gnus-generate-horizontal-tree
669 (pop thread) (if do (1+ level) level)
670 (or dummyp dummy) dummy)))))
672 (defsubst gnus-tree-indent-vertical ()
673 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
674 (- (point) (gnus-point-at-bol)))))
676 (insert (make-string len ? )))))
678 (defsubst gnus-tree-forward-line (n)
679 (while (>= (decf n) 0)
680 (unless (zerop (forward-line 1))
685 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
686 "Generate a vertical tree."
687 (let* ((dummy (stringp (car thread)))
690 (memq (mail-header-number (car thread))
694 ;; We don't want this article.
695 (setq thread (cdr thread))
696 (if (not (save-excursion (beginning-of-line) (bobp)))
697 ;; Not the first article on the line, so we insert a "-".
699 (gnus-tree-indent-vertical)
700 (insert (make-string (/ gnus-tree-node-length 2) ? ))
701 (insert (caddr gnus-tree-parent-child-edges))
702 (gnus-tree-forward-line 1))
703 ;; If the level isn't zero, then we insert some indentation.
704 (unless (zerop gnus-tmp-indent)
705 (gnus-tree-forward-line (1- (* 2 level)))
706 (gnus-tree-indent-vertical)
708 (insert (cadr gnus-tree-parent-child-edges))
710 ;; Draw "-" lines leftwards.
714 (= (following-char) ? ))
716 (insert (car gnus-tree-parent-child-edges)))
718 (gnus-tree-forward-line 1)))
720 ;; Insert the article node.
721 (gnus-tree-indent-vertical)
722 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
723 (gnus-tree-forward-line 1))
725 ;; End of the thread, so we go to the next line.
727 (goto-char (point-min))
729 (incf gnus-tmp-indent))
730 ;; Recurse downwards in all children of this article.
732 (gnus-generate-vertical-tree
733 (pop thread) (if do (1+ level) level)
734 (or dummyp dummy) dummy)))))
736 ;;; Interface functions.
738 (defun gnus-possibly-generate-tree (article &optional force)
739 "Generate the thread tree for ARTICLE if it isn't displayed already."
740 (when (save-excursion
741 (set-buffer gnus-summary-buffer)
744 (vectorp (gnus-summary-article-header article))))
746 (let ((top (save-excursion
747 (set-buffer gnus-summary-buffer)
751 (gnus-summary-article-header article))
753 (gnus-tmp-limit gnus-newsgroup-limit)
754 (gnus-tmp-sparse gnus-newsgroup-sparse))
756 (not (eq top gnus-tree-displayed-thread)))
757 (gnus-generate-tree top)
758 (setq gnus-tree-displayed-thread top))))))
760 (defun gnus-tree-open (group)
761 (gnus-get-tree-buffer))
763 (defun gnus-tree-close (group)
764 ;(gnus-kill-buffer gnus-tree-buffer)
767 (defun gnus-highlight-selected-tree (article)
768 "Highlight the selected article in the tree."
769 (let ((buf (current-buffer))
771 (set-buffer gnus-tree-buffer)
772 (when (setq region (gnus-tree-article-region article))
773 (when (or (not gnus-selected-tree-overlay)
774 (gnus-extent-detached-p gnus-selected-tree-overlay))
775 ;; Create a new overlay.
777 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
778 'face gnus-selected-tree-face))
779 ;; Move the overlay to the article.
781 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
784 (let ((selected (selected-window)))
785 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
786 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
787 (gnus-horizontal-recenter)
788 (select-window selected))))
789 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
791 (set-buffer gnus-tree-buffer)
792 (gnus-set-mode-line 'tree))
795 (defun gnus-tree-highlight-article (article face)
797 (set-buffer (gnus-get-tree-buffer))
799 (when (setq region (gnus-tree-article-region article))
800 (gnus-put-text-property (car region) (cdr region) 'face face)
802 (get-buffer-window (current-buffer) t) (cdr region))))))
808 (defvar gnus-carpal-group-buffer-buttons
809 '(("next" . gnus-group-next-unread-group)
810 ("prev" . gnus-group-prev-unread-group)
811 ("read" . gnus-group-read-group)
812 ("select" . gnus-group-select-group)
813 ("catch-up" . gnus-group-catchup-current)
814 ("new-news" . gnus-group-get-new-news-this-group)
815 ("toggle-sub" . gnus-group-unsubscribe-current-group)
816 ("subscribe" . gnus-group-unsubscribe-group)
817 ("kill" . gnus-group-kill-group)
818 ("yank" . gnus-group-yank-group)
819 ("describe" . gnus-group-describe-group)
821 ("subscribed" . gnus-group-list-groups)
822 ("all" . gnus-group-list-all-groups)
823 ("killed" . gnus-group-list-killed)
824 ("zombies" . gnus-group-list-zombies)
825 ("matching" . gnus-group-list-matching)
826 ("post" . gnus-group-post-news)
827 ("mail" . gnus-group-mail)
828 ("rescan" . gnus-group-get-new-news)
829 ("browse-foreign" . gnus-group-browse-foreign)
830 ("exit" . gnus-group-exit)))
832 (defvar gnus-carpal-summary-buffer-buttons
834 ("read" . gnus-summary-mark-as-read-forward)
835 ("tick" . gnus-summary-tick-article-forward)
836 ("clear" . gnus-summary-clear-mark-forward)
837 ("expirable" . gnus-summary-mark-as-expirable)
839 ("scroll" . gnus-summary-next-page)
840 ("next-unread" . gnus-summary-next-unread-article)
841 ("prev-unread" . gnus-summary-prev-unread-article)
842 ("first" . gnus-summary-first-unread-article)
843 ("best" . gnus-summary-best-unread-article)
845 ("headers" . gnus-summary-toggle-header)
846 ("uudecode" . gnus-uu-decode-uu)
847 ("enter-digest" . gnus-summary-enter-digest-group)
848 ("fetch-parent" . gnus-summary-refer-parent-article)
850 ("move" . gnus-summary-move-article)
851 ("copy" . gnus-summary-copy-article)
852 ("respool" . gnus-summary-respool-article)
854 ("lower" . gnus-summary-lower-thread)
855 ("kill" . gnus-summary-kill-thread)
857 ("post" . gnus-summary-post-news)
858 ("mail" . gnus-summary-mail)
859 ("followup" . gnus-summary-followup-with-original)
860 ("reply" . gnus-summary-reply-with-original)
861 ("cancel" . gnus-summary-cancel-article)
863 ("exit" . gnus-summary-exit)
864 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
866 (defvar gnus-carpal-server-buffer-buttons
867 '(("add" . gnus-server-add-server)
868 ("browse" . gnus-server-browse-server)
869 ("list" . gnus-server-list-servers)
870 ("kill" . gnus-server-kill-server)
871 ("yank" . gnus-server-yank-server)
872 ("copy" . gnus-server-copy-server)
873 ("exit" . gnus-server-exit)))
875 (defvar gnus-carpal-browse-buffer-buttons
876 '(("subscribe" . gnus-browse-unsubscribe-current-group)
877 ("exit" . gnus-browse-exit)))
879 (defvar gnus-carpal-group-buffer "*Carpal Group*")
880 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
881 (defvar gnus-carpal-server-buffer "*Carpal Server*")
882 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
884 (defvar gnus-carpal-attached-buffer nil)
886 (defvar gnus-carpal-mode-hook nil
887 "*Hook run in carpal mode buffers.")
889 (defvar gnus-carpal-button-face 'bold
890 "*Face used on carpal buttons.")
892 (defvar gnus-carpal-header-face 'bold-italic
893 "*Face used on carpal buffer headers.")
895 (defvar gnus-carpal-mode-map nil)
896 (put 'gnus-carpal-mode 'mode-class 'special)
898 (if gnus-carpal-mode-map
900 (setq gnus-carpal-mode-map (make-keymap))
901 (suppress-keymap gnus-carpal-mode-map)
902 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
903 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
904 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
906 (defun gnus-carpal-mode ()
907 "Major mode for clicking buttons.
909 All normal editing commands are switched off.
910 \\<gnus-carpal-mode-map>
911 The following commands are available:
913 \\{gnus-carpal-mode-map}"
915 (kill-all-local-variables)
916 (setq mode-line-modified "-- ")
917 (setq major-mode 'gnus-carpal-mode)
918 (setq mode-name "Gnus Carpal")
919 (setq mode-line-process nil)
920 (use-local-map gnus-carpal-mode-map)
921 (buffer-disable-undo (current-buffer))
922 (setq buffer-read-only t)
923 (make-local-variable 'gnus-carpal-attached-buffer)
924 (run-hooks 'gnus-carpal-mode-hook))
926 (defun gnus-carpal-setup-buffer (type)
927 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
928 (if (get-buffer buffer)
931 (set-buffer (get-buffer-create buffer))
933 (setq gnus-carpal-attached-buffer
934 (intern (format "gnus-%s-buffer" type)))
935 (gnus-add-current-to-buffer-list)
936 (let ((buttons (symbol-value
937 (intern (format "gnus-carpal-%s-buffer-buttons"
939 (buffer-read-only nil)
942 (setq button (car buttons)
943 buttons (cdr buttons))
945 (gnus-set-text-properties
947 (prog2 (insert button) (point) (insert " "))
948 (list 'face gnus-carpal-header-face))
949 (gnus-set-text-properties
951 (prog2 (insert (car button)) (point) (insert " "))
952 (list 'gnus-callback (cdr button)
953 'face gnus-carpal-button-face
954 gnus-mouse-face-prop 'highlight))))
955 (let ((fill-column (- (window-width) 2)))
956 (fill-region (point-min) (point-max)))
957 (set-window-point (get-buffer-window (current-buffer))
960 (defun gnus-carpal-select ()
961 "Select the button under point."
963 (let ((func (get-text-property (point) 'gnus-callback)))
966 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
967 (call-interactively func))))
969 (defun gnus-carpal-mouse-select (event)
970 "Select the button under the mouse pointer."
972 (mouse-set-point event)
973 (gnus-carpal-select))
975 ;;; Allow redefinition of functions.
980 ;;; gnus-salt.el ends here