1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
3 ;; Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
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.
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
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
29 (eval-when-compile (require 'cl))
38 (defvar gnus-pick-mode nil
39 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
41 (defcustom gnus-pick-display-summary nil
42 "*Display summary while reading."
44 :group 'gnus-summary-pick)
46 (defcustom gnus-pick-mode-hook nil
47 "Hook run in summary pick mode buffers."
49 :group 'gnus-summary-pick)
51 (defcustom gnus-mark-unpicked-articles-as-read nil
52 "*If non-nil, mark all unpicked articles as read."
54 :group 'gnus-summary-pick)
56 (defcustom gnus-pick-elegant-flow t
57 "If non-nil, `gnus-pick-start-reading' runs `gnus-summary-next-group' when no articles have been picked."
59 :group 'gnus-summary-pick)
61 (defcustom gnus-summary-pick-line-format
62 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
63 "*The format specification of the lines in pick buffers.
64 It accepts the same format specs that `gnus-summary-line-format' does."
66 :group 'gnus-summary-pick)
68 ;;; Internal variables.
70 (defvar gnus-pick-mode-map nil)
72 (unless gnus-pick-mode-map
73 (setq gnus-pick-mode-map (make-sparse-keymap))
75 (gnus-define-keys gnus-pick-mode-map
76 " " gnus-pick-next-page
77 "u" gnus-pick-unmark-article-or-thread
78 "." gnus-pick-article-or-thread
79 gnus-down-mouse-2 gnus-pick-mouse-pick-region
80 "\r" gnus-pick-start-reading))
82 (defun gnus-pick-make-menu-bar ()
83 (unless (boundp 'gnus-pick-menu)
85 gnus-pick-menu gnus-pick-mode-map ""
88 ["Article" gnus-summary-mark-as-processable t]
89 ["Thread" gnus-uu-mark-thread t]
90 ["Region" gnus-uu-mark-region t]
91 ["Regexp" gnus-uu-mark-by-regexp t]
92 ["Buffer" gnus-uu-mark-buffer t])
94 ["Article" gnus-summary-unmark-as-processable t]
95 ["Thread" gnus-uu-unmark-thread t]
96 ["Region" gnus-uu-unmark-region t]
97 ["Regexp" gnus-uu-unmark-by-regexp t]
98 ["Buffer" gnus-summary-unmark-all-processable t])
99 ["Start reading" gnus-pick-start-reading t]
100 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
102 (defun gnus-pick-mode (&optional arg)
103 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
105 \\{gnus-pick-mode-map}"
107 (when (eq major-mode 'gnus-summary-mode)
108 (if (not (set (make-local-variable 'gnus-pick-mode)
109 (if (null arg) (not gnus-pick-mode)
110 (> (prefix-numeric-value arg) 0))))
111 (remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
112 ;; Make sure that we don't select any articles upon group entry.
113 (set (make-local-variable 'gnus-auto-select-first) nil)
114 ;; Change line format.
115 (setq gnus-summary-line-format gnus-summary-pick-line-format)
116 (setq gnus-summary-line-format-spec nil)
117 (gnus-update-format-specifications nil 'summary)
118 (gnus-update-summary-mark-positions)
119 (add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
120 (set (make-local-variable 'gnus-summary-goto-unread) 'never)
122 (when (gnus-visual-p 'pick-menu 'menu)
123 (gnus-pick-make-menu-bar))
124 (gnus-add-minor-mode 'gnus-pick-mode " Pick" gnus-pick-mode-map
126 (gnus-run-hooks 'gnus-pick-mode-hook))))
128 (defun gnus-pick-setup-message ()
129 "Make Message do the right thing on exit."
130 (when (and (gnus-buffer-live-p gnus-summary-buffer)
132 (set-buffer gnus-summary-buffer)
135 '(gnus-configure-windows ,gnus-current-window-configuration t)
136 'send 'exit 'postpone 'kill)))
138 (defvar gnus-pick-line-number 1)
139 (defun gnus-pick-line-number ()
140 "Return the current line number."
142 (setq gnus-pick-line-number 1)
143 (incf gnus-pick-line-number)))
145 (defun gnus-pick-start-reading (&optional catch-up)
146 "Start reading the picked articles.
147 If given a prefix, mark all unpicked articles as read."
149 (if gnus-newsgroup-processable
151 (gnus-summary-limit-to-articles nil)
152 (when (or catch-up gnus-mark-unpicked-articles-as-read)
153 (gnus-summary-limit-mark-excluded-as-read))
154 (gnus-summary-first-article)
155 (gnus-configure-windows
156 (if gnus-pick-display-summary 'article 'pick) t))
157 (if gnus-pick-elegant-flow
159 (when (or catch-up gnus-mark-unpicked-articles-as-read)
160 (gnus-summary-catchup nil t))
161 (if (gnus-group-quit-config gnus-newsgroup-name)
163 (gnus-summary-next-group)))
164 (error "No articles have been picked"))))
166 (defun gnus-pick-goto-article (arg)
167 "Go to the article number indicated by ARG.
168 If ARG is an invalid article number, then stay on current line."
171 (goto-char (point-min))
172 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
175 (gnus-error 2 "No such line: %s" arg)
178 (defun gnus-pick-article (&optional arg)
179 "Pick the article on the current line.
180 If ARG, pick the article on that line instead."
183 (gnus-pick-goto-article arg))
184 (gnus-summary-mark-as-processable 1))
186 (defun gnus-pick-article-or-thread (&optional arg)
187 "If `gnus-thread-hide-subtree' is t, then pick the thread on the current line.
188 Otherwise pick the article on the current line.
189 If ARG, pick the article/thread on that line instead."
192 (gnus-pick-goto-article arg))
193 (if gnus-thread-hide-subtree
196 (gnus-uu-mark-thread))
198 (gnus-summary-mark-as-processable 1)))
200 (defun gnus-pick-unmark-article-or-thread (&optional arg)
201 "If `gnus-thread-hide-subtree' is t, then unmark the thread on current line.
202 Otherwise unmark the article on current line.
203 If ARG, unmark thread/article on that line instead."
206 (gnus-pick-goto-article arg))
207 (if gnus-thread-hide-subtree
209 (gnus-uu-unmark-thread))
210 (gnus-summary-unmark-as-processable 1)))
212 (defun gnus-pick-mouse-pick (e)
216 (gnus-summary-mark-as-processable 1)))
218 (defun gnus-pick-mouse-pick-region (start-event)
219 "Pick articles that the mouse is dragged over.
220 This must be bound to a button-down mouse event."
222 (mouse-minibuffer-check start-event)
223 (let* ((echo-keystrokes 0)
224 (start-posn (event-start start-event))
225 (start-point (posn-point start-posn))
226 (start-line (1+ (count-lines 1 start-point)))
227 (start-window (posn-window start-posn))
228 (bounds (gnus-window-edges start-window))
230 (bottom (if (window-minibuffer-p start-window)
232 ;; Don't count the mode line.
233 (1- (nth 3 bounds))))
234 (click-count (1- (event-click-count start-event))))
235 (setq mouse-selection-click-count click-count)
236 (setq mouse-selection-click-count-buffer (current-buffer))
237 (mouse-set-point start-event)
238 ;; In case the down click is in the middle of some intangible text,
239 ;; use the end of that text, and put it in START-POINT.
240 (when (< (point) start-point)
241 (goto-char start-point))
243 (setq start-point (point))
244 ;; end-of-range is used only in the single-click case.
245 ;; It is the place where the drag has reached so far
246 ;; (but not outside the window where the drag started).
247 (let (event end end-point (end-of-range (point)))
250 (setq event (cdr (gnus-read-event-char)))
251 (or (mouse-movement-p event)
252 (eq (car-safe event) 'switch-frame)))
253 (if (eq (car-safe event) 'switch-frame)
255 (setq end (event-end event)
256 end-point (posn-point end))
259 ;; Are we moving within the original window?
260 ((and (eq (posn-window end) start-window)
261 (integer-or-marker-p end-point))
262 ;; Go to START-POINT first, so that when we move to END-POINT,
263 ;; if it's in the middle of intangible text,
264 ;; point jumps in the direction away from START-POINT.
265 (goto-char start-point)
266 (goto-char end-point)
268 ;; In case the user moved his mouse really fast, pick
269 ;; articles on the line between this one and the last one.
270 (let* ((this-line (1+ (count-lines 1 end-point)))
271 (min-line (min this-line start-line))
272 (max-line (max this-line start-line)))
273 (while (< min-line max-line)
276 (setq min-line (1+ min-line)))
277 (setq start-line this-line))
278 (when (zerop (% click-count 3))
279 (setq end-of-range (point))))
281 (let ((mouse-row (cdr (cdr (mouse-position)))))
285 (mouse-scroll-subr start-window (- mouse-row top)))
286 ((>= mouse-row bottom)
287 (mouse-scroll-subr start-window
288 (1+ (- mouse-row bottom)))))))))))
290 (let ((fun (key-binding (vector (car event)))))
291 ;; Run the binding of the terminating up-event, if possible.
292 ;; In the case of a multiple click, it gives the wrong results,
293 ;; because it would fail to set up a region.
295 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
296 ;; In this case, we can just let the up-event execute normally.
297 (let ((end (event-end event)))
298 ;; Set the position in the event before we replay it,
299 ;; because otherwise it may have a position in the wrong
301 (setcar (cdr end) end-of-range)
302 ;; Delete the overlay before calling the function,
303 ;; because delete-overlay increases buffer-modified-tick.
304 (push event unread-command-events))))))))
306 (defun gnus-pick-next-page ()
307 "Go to the next page. If at the end of the buffer, start reading articles."
309 (let ((scroll-in-place nil))
312 (end-of-buffer (gnus-pick-start-reading)))))
318 (defvar gnus-binary-mode nil
319 "Minor mode for providing a binary group interface in Gnus summary buffers.")
321 (defvar gnus-binary-mode-hook nil
322 "Hook run in summary binary mode buffers.")
324 (defvar gnus-binary-mode-map nil)
326 (unless gnus-binary-mode-map
327 (setq gnus-binary-mode-map (make-sparse-keymap))
331 "g" gnus-binary-show-article))
333 (defun gnus-binary-make-menu-bar ()
334 (unless (boundp 'gnus-binary-menu)
336 gnus-binary-menu gnus-binary-mode-map ""
338 ["Switch binary mode off" gnus-binary-mode t]))))
340 (defun gnus-binary-mode (&optional arg)
341 "Minor mode for providing a binary group interface in Gnus summary buffers."
343 (when (eq major-mode 'gnus-summary-mode)
344 (make-local-variable 'gnus-binary-mode)
345 (setq gnus-binary-mode
346 (if (null arg) (not gnus-binary-mode)
347 (> (prefix-numeric-value arg) 0)))
348 (when gnus-binary-mode
349 ;; Make sure that we don't select any articles upon group entry.
350 (make-local-variable 'gnus-auto-select-first)
351 (setq gnus-auto-select-first nil)
352 (make-local-variable 'gnus-summary-display-article-function)
353 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
355 (when (gnus-visual-p 'binary-menu 'menu)
356 (gnus-binary-make-menu-bar))
357 (gnus-add-minor-mode 'gnus-binary-mode " Binary"
358 gnus-binary-mode-map nil 'gnus-binary-mode)
359 (gnus-run-hooks 'gnus-binary-mode-hook))))
361 (defun gnus-binary-display-article (article &optional all-header)
362 "Run ARTICLE through the binary decode functions."
363 (when (gnus-summary-goto-subject article)
364 (let ((gnus-view-pseudos 'automatic))
365 (gnus-uu-decode-uu))))
367 (defun gnus-binary-show-article (&optional arg)
368 "Bypass the binary functions and show the article."
370 (let (gnus-summary-display-article-function)
371 (gnus-summary-show-article arg)))
377 (defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
378 "Format of tree elements."
380 :group 'gnus-summary-tree)
382 (defcustom gnus-tree-minimize-window t
383 "If non-nil, minimize the tree buffer window.
384 If a number, never let the tree buffer grow taller than that number of
386 :type '(choice boolean
388 :group 'gnus-summary-tree)
390 (defcustom gnus-selected-tree-face 'modeline
391 "*Face used for highlighting selected articles in the thread tree."
393 :group 'gnus-summary-tree)
395 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
396 (?\{ . ?\}) (?< . ?>))
397 "Brackets used in tree nodes.")
399 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
400 "Characters used to connect parents with children.")
402 (defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
403 "*The format specification for the tree mode line."
405 :group 'gnus-summary-tree)
407 (defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
408 "*Function for generating a thread tree.
409 Two predefined functions are available:
410 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
411 :type '(radio (function-item gnus-generate-vertical-tree)
412 (function-item gnus-generate-horizontal-tree)
413 (function :tag "Other" nil))
414 :group 'gnus-summary-tree)
416 (defcustom gnus-tree-mode-hook nil
417 "*Hook run in tree mode buffers."
419 :group 'gnus-summary-tree)
421 ;;; Internal variables.
423 (defvar gnus-tree-line-format-alist
424 `((?n gnus-tmp-name ?s)
425 (?f gnus-tmp-from ?s)
426 (?N gnus-tmp-number ?d)
427 (?\[ gnus-tmp-open-bracket ?c)
428 (?\] gnus-tmp-close-bracket ?c)
429 (?s gnus-tmp-subject ?s)))
431 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
433 (defvar gnus-tree-mode-line-format-spec nil)
434 (defvar gnus-tree-line-format-spec nil)
436 (defvar gnus-tree-node-length nil)
437 (defvar gnus-selected-tree-overlay nil)
439 (defvar gnus-tree-displayed-thread nil)
440 (defvar gnus-tree-inhibit nil)
442 (defvar gnus-tree-mode-map nil)
443 (put 'gnus-tree-mode 'mode-class 'special)
445 (unless gnus-tree-mode-map
446 (setq gnus-tree-mode-map (make-keymap))
447 (suppress-keymap gnus-tree-mode-map)
450 "\r" gnus-tree-select-article
451 gnus-mouse-2 gnus-tree-pick-article
452 "\C-?" gnus-tree-read-summary-keys
453 "h" gnus-tree-show-summary
455 "\C-c\C-i" gnus-info-find-node)
457 (substitute-key-definition
458 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
460 (defun gnus-tree-make-menu-bar ()
461 (unless (boundp 'gnus-tree-menu)
463 gnus-tree-menu gnus-tree-mode-map ""
465 ["Select article" gnus-tree-select-article t]))))
467 (defun gnus-tree-mode ()
468 "Major mode for displaying thread trees."
470 (gnus-set-format 'tree-mode)
471 (gnus-set-format 'tree t)
472 (when (gnus-visual-p 'tree-menu 'menu)
473 (gnus-tree-make-menu-bar))
474 (kill-all-local-variables)
475 (gnus-simplify-mode-line)
476 (setq mode-name "Tree")
477 (setq major-mode 'gnus-tree-mode)
478 (use-local-map gnus-tree-mode-map)
479 (buffer-disable-undo)
480 (setq buffer-read-only t)
481 (setq truncate-lines t)
483 (gnus-set-work-buffer)
484 (gnus-tree-node-insert (make-mail-header "") nil)
485 (setq gnus-tree-node-length (1- (point))))
486 (gnus-run-hooks 'gnus-tree-mode-hook))
488 (defun gnus-tree-read-summary-keys (&optional arg)
489 "Read a summary buffer key sequence and execute it."
491 (unless gnus-tree-inhibit
492 (let ((buf (current-buffer))
493 (gnus-tree-inhibit t)
495 (set-buffer gnus-article-buffer)
496 (gnus-article-read-summary-keys arg nil t)
497 (when (setq win (get-buffer-window buf))
499 (when gnus-selected-tree-overlay
500 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
501 (gnus-tree-minimize)))))
503 (defun gnus-tree-show-summary ()
504 "Reconfigure windows to show summary buffer."
506 (if (not (gnus-buffer-live-p gnus-summary-buffer))
507 (error "There is no summary buffer for this tree buffer")
508 (gnus-configure-windows 'article)
509 (gnus-summary-goto-subject gnus-current-article)))
511 (defun gnus-tree-select-article (article)
512 "Select the article under point, if any."
513 (interactive (list (gnus-tree-article-number)))
514 (let ((buf (current-buffer)))
517 (set-buffer gnus-summary-buffer)
518 (gnus-summary-goto-article article))
519 (select-window (get-buffer-window buf)))))
521 (defun gnus-tree-pick-article (e)
522 "Select the article under the mouse pointer."
525 (gnus-tree-select-article (gnus-tree-article-number)))
527 (defun gnus-tree-article-number ()
528 (get-text-property (point) 'gnus-number))
530 (defun gnus-tree-article-region (article)
531 "Return a cons with BEG and END of the article region."
532 (let ((pos (text-property-any
533 (point-min) (point-max) 'gnus-number article)))
535 (cons pos (next-single-property-change pos 'gnus-number)))))
537 (defun gnus-tree-goto-article (article)
538 (let ((pos (text-property-any
539 (point-min) (point-max) 'gnus-number article)))
543 (defun gnus-tree-recenter ()
544 "Center point in the tree window."
545 (let ((selected (selected-window))
546 (tree-window (get-buffer-window gnus-tree-buffer t)))
548 (select-window tree-window)
549 (when gnus-selected-tree-overlay
550 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
551 (let* ((top (cond ((< (window-height) 4) 0)
552 ((< (window-height) 7) 1)
554 (height (1- (window-height)))
555 (bottom (save-excursion (goto-char (point-max))
556 (forward-line (- height))
558 ;; Set the window start to either `bottom', which is the biggest
559 ;; possible valid number, or the second line from the top,
560 ;; whichever is the least.
562 tree-window (min bottom (save-excursion
563 (forward-line (- top)) (point)))))
564 (select-window selected))))
566 (defun gnus-get-tree-buffer ()
567 "Return the tree buffer properly initialized."
569 (set-buffer (gnus-get-buffer-create gnus-tree-buffer))
570 (unless (eq major-mode 'gnus-tree-mode)
574 (defun gnus-tree-minimize ()
575 (when (and gnus-tree-minimize-window
576 (not (one-window-p)))
579 (walk-windows (lambda (window) (incf windows)))
582 (* window-min-height (1- windows))
584 (let* ((window-min-height 2)
585 (height (count-lines (point-min) (point-max)))
586 (min (max (1- window-min-height) height))
587 (tot (if (numberp gnus-tree-minimize-window)
588 (min gnus-tree-minimize-window min)
590 (win (get-buffer-window (current-buffer)))
591 (wh (and win (1- (window-height win)))))
592 (setq tot (min tot tot-win-height))
595 (let ((selected (selected-window)))
596 (when (ignore-errors (select-window win))
597 (enlarge-window (- tot wh))
598 (select-window selected))))))))
600 ;;; Generating the tree.
602 (defun gnus-tree-node-insert (header sparse &optional adopted)
603 (let* ((dummy (stringp header))
604 (header (if (vectorp header) header
606 (setq header (make-mail-header "*****"))
607 (mail-header-set-number header 0)
608 (mail-header-set-lines header 0)
609 (mail-header-set-chars header 0)
611 (gnus-tmp-from (mail-header-from header))
612 (gnus-tmp-subject (mail-header-subject header))
613 (gnus-tmp-number (mail-header-number header))
616 ((string-match "(.+)" gnus-tmp-from)
617 (substring gnus-tmp-from
618 (1+ (match-beginning 0)) (1- (match-end 0))))
619 ((string-match "<[^>]+> *$" gnus-tmp-from)
620 (let ((beg (match-beginning 0)))
621 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
622 (substring gnus-tmp-from (1+ (match-beginning 0))
624 (substring gnus-tmp-from 0 beg))))
625 ((memq gnus-tmp-number sparse)
628 (gnus-tmp-open-bracket
629 (cond ((memq gnus-tmp-number sparse)
630 (caadr gnus-tree-brackets))
631 (dummy (caaddr gnus-tree-brackets))
632 (adopted (car (nth 3 gnus-tree-brackets)))
633 (t (caar gnus-tree-brackets))))
634 (gnus-tmp-close-bracket
635 (cond ((memq gnus-tmp-number sparse)
636 (cdadr gnus-tree-brackets))
637 (adopted (cdr (nth 3 gnus-tree-brackets)))
639 (cdaddr gnus-tree-brackets))
640 (t (cdar gnus-tree-brackets))))
641 (buffer-read-only nil)
643 (gnus-add-text-properties
645 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
646 (list 'gnus-number gnus-tmp-number))
647 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
648 (gnus-tree-highlight-node gnus-tmp-number beg end))))
650 (defun gnus-tree-highlight-node (article beg end)
651 "Highlight current line according to `gnus-summary-highlight'."
652 (let ((list gnus-summary-highlight)
655 (set-buffer gnus-summary-buffer)
656 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
657 gnus-summary-default-score 0))
658 (default gnus-summary-default-score)
659 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
660 ;; Eval the cars of the lists until we find a match.
662 (not (eval (caar list))))
663 (setq list (cdr list)))))
664 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
665 (gnus-put-text-property-excluding-characters-with-faces
667 (if (boundp face) (symbol-value face) face)))))
669 (defun gnus-tree-indent (level)
670 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
672 (defvar gnus-tmp-limit)
673 (defvar gnus-tmp-sparse)
674 (defvar gnus-tmp-indent)
676 (defun gnus-generate-tree (thread)
677 "Generate a thread tree for THREAD."
679 (set-buffer (gnus-get-tree-buffer))
680 (let ((buffer-read-only nil)
683 (funcall gnus-generate-tree-function thread 0)
684 (gnus-set-mode-line 'tree)
685 (goto-char (point-min))
688 (let ((selected (selected-window)))
689 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
690 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
691 (gnus-horizontal-recenter)
692 (select-window selected))))))
694 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
695 "Generate a horizontal tree."
696 (let* ((dummy (stringp (car thread)))
699 (memq (mail-header-number (car thread))
703 ;; We don't want this article.
704 (setq thread (cdr thread))
706 ;; Not the first article on the line, so we insert a "-".
707 (insert (car gnus-tree-parent-child-edges))
708 ;; If the level isn't zero, then we insert some indentation.
709 (unless (zerop level)
710 (gnus-tree-indent level)
711 (insert (cadr gnus-tree-parent-child-edges))
712 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
713 ;; Draw "|" lines upwards.
717 (eq (char-after) ? ))
719 (insert (caddr gnus-tree-parent-child-edges)))
722 ;; Insert the article node.
723 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
725 ;; End of the thread, so we go to the next line.
728 ;; Recurse downwards in all children of this article.
730 (gnus-generate-horizontal-tree
731 (pop thread) (if do (1+ level) level)
732 (or dummyp dummy) dummy)))))
734 (defsubst gnus-tree-indent-vertical ()
735 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
736 (- (point) (gnus-point-at-bol)))))
738 (insert (make-string len ? )))))
740 (defsubst gnus-tree-forward-line (n)
741 (while (>= (decf n) 0)
742 (unless (zerop (forward-line 1))
747 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
748 "Generate a vertical tree."
749 (let* ((dummy (stringp (car thread)))
752 (memq (mail-header-number (car thread))
756 ;; We don't want this article.
757 (setq thread (cdr thread))
758 (if (not (save-excursion (beginning-of-line) (bobp)))
759 ;; Not the first article on the line, so we insert a "-".
761 (gnus-tree-indent-vertical)
762 (insert (make-string (/ gnus-tree-node-length 2) ? ))
763 (insert (caddr gnus-tree-parent-child-edges))
764 (gnus-tree-forward-line 1))
765 ;; If the level isn't zero, then we insert some indentation.
766 (unless (zerop gnus-tmp-indent)
767 (gnus-tree-forward-line (1- (* 2 level)))
768 (gnus-tree-indent-vertical)
770 (insert (cadr gnus-tree-parent-child-edges))
773 ;; Draw "-" lines leftwards.
774 (while (and (> (point) 1)
775 (eq (char-after (1- (point))) ? ))
777 (insert (car gnus-tree-parent-child-edges))
780 (gnus-tree-forward-line 1)))
782 ;; Insert the article node.
783 (gnus-tree-indent-vertical)
784 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
785 (gnus-tree-forward-line 1))
787 ;; End of the thread, so we go to the next line.
789 (goto-char (point-min))
791 (incf gnus-tmp-indent))
792 ;; Recurse downwards in all children of this article.
794 (gnus-generate-vertical-tree
795 (pop thread) (if do (1+ level) level)
796 (or dummyp dummy) dummy)))))
798 ;;; Interface functions.
800 (defun gnus-possibly-generate-tree (article &optional force)
801 "Generate the thread tree for ARTICLE if it isn't displayed already."
802 (when (save-excursion
803 (set-buffer gnus-summary-buffer)
806 (vectorp (gnus-summary-article-header article))))
808 (let ((top (save-excursion
809 (set-buffer gnus-summary-buffer)
813 (gnus-summary-article-header article))
815 (gnus-tmp-limit gnus-newsgroup-limit)
816 (gnus-tmp-sparse gnus-newsgroup-sparse))
818 (not (eq top gnus-tree-displayed-thread)))
819 (gnus-generate-tree top)
820 (setq gnus-tree-displayed-thread top))))))
822 (defun gnus-tree-open (group)
823 (gnus-get-tree-buffer))
825 (defun gnus-tree-close (group)
826 (gnus-kill-buffer gnus-tree-buffer))
828 (defun gnus-highlight-selected-tree (article)
829 "Highlight the selected article in the tree."
830 (let ((buf (current-buffer))
832 (set-buffer gnus-tree-buffer)
833 (when (setq region (gnus-tree-article-region article))
834 (when (or (not gnus-selected-tree-overlay)
835 (gnus-extent-detached-p gnus-selected-tree-overlay))
836 ;; Create a new overlay.
838 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
839 'face gnus-selected-tree-face))
840 ;; Move the overlay to the article.
842 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
845 (let ((selected (selected-window)))
846 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
847 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
848 (gnus-horizontal-recenter)
849 (select-window selected))))
850 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
852 (set-buffer gnus-tree-buffer)
853 (gnus-set-mode-line 'tree))
856 (defun gnus-tree-highlight-article (article face)
858 (set-buffer (gnus-get-tree-buffer))
860 (when (setq region (gnus-tree-article-region article))
861 (gnus-put-text-property (car region) (cdr region) 'face face)
863 (get-buffer-window (current-buffer) t) (cdr region))))))
869 (defvar gnus-carpal-group-buffer-buttons
870 '(("next" . gnus-group-next-unread-group)
871 ("prev" . gnus-group-prev-unread-group)
872 ("read" . gnus-group-read-group)
873 ("select" . gnus-group-select-group)
874 ("catch-up" . gnus-group-catchup-current)
875 ("new-news" . gnus-group-get-new-news-this-group)
876 ("toggle-sub" . gnus-group-unsubscribe-current-group)
877 ("subscribe" . gnus-group-unsubscribe-group)
878 ("kill" . gnus-group-kill-group)
879 ("yank" . gnus-group-yank-group)
880 ("describe" . gnus-group-describe-group)
882 ("subscribed" . gnus-group-list-groups)
883 ("all" . gnus-group-list-all-groups)
884 ("killed" . gnus-group-list-killed)
885 ("zombies" . gnus-group-list-zombies)
886 ("matching" . gnus-group-list-matching)
887 ("post" . gnus-group-post-news)
888 ("mail" . gnus-group-mail)
889 ("rescan" . gnus-group-get-new-news)
890 ("browse-foreign" . gnus-group-browse-foreign)
891 ("exit" . gnus-group-exit)))
893 (defvar gnus-carpal-summary-buffer-buttons
895 ("read" . gnus-summary-mark-as-read-forward)
896 ("tick" . gnus-summary-tick-article-forward)
897 ("clear" . gnus-summary-clear-mark-forward)
898 ("expirable" . gnus-summary-mark-as-expirable)
900 ("scroll" . gnus-summary-next-page)
901 ("next-unread" . gnus-summary-next-unread-article)
902 ("prev-unread" . gnus-summary-prev-unread-article)
903 ("first" . gnus-summary-first-unread-article)
904 ("best" . gnus-summary-best-unread-article)
906 ("headers" . gnus-summary-toggle-header)
907 ("uudecode" . gnus-uu-decode-uu)
908 ("enter-digest" . gnus-summary-enter-digest-group)
909 ("fetch-parent" . gnus-summary-refer-parent-article)
911 ("move" . gnus-summary-move-article)
912 ("copy" . gnus-summary-copy-article)
913 ("respool" . gnus-summary-respool-article)
915 ("lower" . gnus-summary-lower-thread)
916 ("kill" . gnus-summary-kill-thread)
918 ("post" . gnus-summary-post-news)
919 ("mail" . gnus-summary-mail)
920 ("followup" . gnus-summary-followup-with-original)
921 ("reply" . gnus-summary-reply-with-original)
922 ("cancel" . gnus-summary-cancel-article)
924 ("exit" . gnus-summary-exit)
925 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
927 (defvar gnus-carpal-server-buffer-buttons
928 '(("add" . gnus-server-add-server)
929 ("browse" . gnus-server-browse-server)
930 ("list" . gnus-server-list-servers)
931 ("kill" . gnus-server-kill-server)
932 ("yank" . gnus-server-yank-server)
933 ("copy" . gnus-server-copy-server)
934 ("exit" . gnus-server-exit)))
936 (defvar gnus-carpal-browse-buffer-buttons
937 '(("subscribe" . gnus-browse-unsubscribe-current-group)
938 ("exit" . gnus-browse-exit)))
940 (defvar gnus-carpal-group-buffer "*Carpal Group*")
941 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
942 (defvar gnus-carpal-server-buffer "*Carpal Server*")
943 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
945 (defvar gnus-carpal-attached-buffer nil)
947 (defvar gnus-carpal-mode-hook nil
948 "*Hook run in carpal mode buffers.")
950 (defvar gnus-carpal-button-face 'bold
951 "*Face used on carpal buttons.")
953 (defvar gnus-carpal-header-face 'bold-italic
954 "*Face used on carpal buffer headers.")
956 (defvar gnus-carpal-mode-map nil)
957 (put 'gnus-carpal-mode 'mode-class 'special)
959 (if gnus-carpal-mode-map
961 (setq gnus-carpal-mode-map (make-keymap))
962 (suppress-keymap gnus-carpal-mode-map)
963 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
964 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
965 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
967 (defun gnus-carpal-mode ()
968 "Major mode for clicking buttons.
970 All normal editing commands are switched off.
971 \\<gnus-carpal-mode-map>
972 The following commands are available:
974 \\{gnus-carpal-mode-map}"
976 (kill-all-local-variables)
977 (setq mode-line-modified (cdr gnus-mode-line-modified))
978 (setq major-mode 'gnus-carpal-mode)
979 (setq mode-name "Gnus Carpal")
980 (setq mode-line-process nil)
981 (use-local-map gnus-carpal-mode-map)
982 (buffer-disable-undo)
983 (setq buffer-read-only t)
984 (make-local-variable 'gnus-carpal-attached-buffer)
985 (gnus-run-hooks 'gnus-carpal-mode-hook))
987 (defun gnus-carpal-setup-buffer (type)
988 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
989 (if (get-buffer buffer)
992 (set-buffer (gnus-get-buffer-create buffer))
994 (setq gnus-carpal-attached-buffer
995 (intern (format "gnus-%s-buffer" type)))
996 (let ((buttons (symbol-value
997 (intern (format "gnus-carpal-%s-buffer-buttons"
999 (buffer-read-only nil)
1002 (setq button (car buttons)
1003 buttons (cdr buttons))
1004 (if (stringp button)
1005 (gnus-set-text-properties
1007 (prog2 (insert button) (point) (insert " "))
1008 (list 'face gnus-carpal-header-face))
1009 (gnus-set-text-properties
1011 (prog2 (insert (car button)) (point) (insert " "))
1012 (list 'gnus-callback (cdr button)
1013 'face gnus-carpal-button-face
1014 gnus-mouse-face-prop 'highlight))))
1015 (let ((fill-column (- (window-width) 2)))
1016 (fill-region (point-min) (point-max)))
1017 (set-window-point (get-buffer-window (current-buffer))
1020 (defun gnus-carpal-select ()
1021 "Select the button under point."
1023 (let ((func (get-text-property (point) 'gnus-callback)))
1026 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1027 (call-interactively func))))
1029 (defun gnus-carpal-mouse-select (event)
1030 "Select the button under the mouse pointer."
1032 (mouse-set-point event)
1033 (gnus-carpal-select))
1035 ;;; Allow redefinition of functions.
1038 (provide 'gnus-salt)
1040 ;;; gnus-salt.el ends here