1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2 ;; Copyright (C) 1996,97,98,99 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
28 (eval-when-compile (require 'cl))
37 (defvar gnus-pick-mode nil
38 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
40 (defcustom gnus-pick-display-summary nil
41 "*Display summary while reading."
43 :group 'gnus-summary-pick)
45 (defcustom gnus-pick-mode-hook nil
46 "Hook run in summary pick mode buffers."
48 :group 'gnus-summary-pick)
50 (defcustom gnus-mark-unpicked-articles-as-read nil
51 "*If non-nil, mark all unpicked articles as read."
53 :group 'gnus-summary-pick)
55 (defcustom gnus-pick-elegant-flow t
56 "If non-nil, gnus-pick-start-reading will run gnus-summary-next-group when no articles have been picked."
58 :group 'gnus-summary-pick)
60 (defcustom gnus-summary-pick-line-format
61 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
62 "*The format specification of the lines in pick buffers.
63 It accepts the same format specs that `gnus-summary-line-format' does."
65 :group 'gnus-summary-pick)
67 ;;; Internal variables.
69 (defvar gnus-pick-mode-map nil)
71 (unless gnus-pick-mode-map
72 (setq gnus-pick-mode-map (make-sparse-keymap))
74 (gnus-define-keys gnus-pick-mode-map
75 " " gnus-pick-next-page
76 "u" gnus-pick-unmark-article-or-thread
77 "." gnus-pick-article-or-thread
78 gnus-down-mouse-2 gnus-pick-mouse-pick-region
79 "\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)
125 (gnus-run-hooks 'gnus-pick-mode-hook))))
127 (defun gnus-pick-setup-message ()
128 "Make Message do the right thing on exit."
129 (when (and (gnus-buffer-live-p gnus-summary-buffer)
131 (set-buffer gnus-summary-buffer)
134 '(gnus-configure-windows ,gnus-current-window-configuration t)
135 'send 'exit 'postpone 'kill)))
137 (defvar gnus-pick-line-number 1)
138 (defun gnus-pick-line-number ()
139 "Return the current line number."
141 (setq gnus-pick-line-number 1)
142 (incf gnus-pick-line-number)))
144 (defun gnus-pick-start-reading (&optional catch-up)
145 "Start reading the picked articles.
146 If given a prefix, mark all unpicked articles as read."
148 (if gnus-newsgroup-processable
150 (gnus-summary-limit-to-articles nil)
151 (when (or catch-up gnus-mark-unpicked-articles-as-read)
152 (gnus-summary-limit-mark-excluded-as-read))
153 (gnus-summary-first-article)
154 (gnus-configure-windows
155 (if gnus-pick-display-summary 'article 'pick) t))
156 (if gnus-pick-elegant-flow
158 (when (or catch-up gnus-mark-unpicked-articles-as-read)
159 (gnus-summary-catchup nil t))
160 (if (gnus-group-quit-config gnus-newsgroup-name)
162 (gnus-summary-next-group)))
163 (error "No articles have been picked"))))
165 (defun gnus-pick-goto-article (arg)
166 "Go to the article number indicated by ARG. If ARG is an invalid
167 article number, then stay on current line."
170 (goto-char (point-min))
171 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
174 (gnus-error 2 "No such line: %s" arg)
177 (defun gnus-pick-article (&optional arg)
178 "Pick the article on the current line.
179 If ARG, pick the article on that line instead."
182 (gnus-pick-goto-article arg))
183 (gnus-summary-mark-as-processable 1))
185 (defun gnus-pick-article-or-thread (&optional arg)
186 "If gnus-thread-hide-subtree is t, then pick the thread on the current line.
187 Otherwise pick the article on the current line.
188 If ARG, pick the article/thread on that line instead."
191 (gnus-pick-goto-article arg))
192 (if gnus-thread-hide-subtree
193 (gnus-uu-mark-thread)
194 (gnus-summary-mark-as-processable 1)))
196 (defun gnus-pick-unmark-article-or-thread (&optional arg)
197 "If gnus-thread-hide-subtree is t, then unmark the thread on current line.
198 Otherwise unmark the article on current line.
199 If ARG, unmark thread/article on that line instead."
202 (gnus-pick-goto-article arg))
203 (if gnus-thread-hide-subtree
204 (gnus-uu-unmark-thread)
205 (gnus-summary-unmark-as-processable 1)))
207 (defun gnus-pick-mouse-pick (e)
211 (gnus-summary-mark-as-processable 1)))
213 (defun gnus-pick-mouse-pick-region (start-event)
214 "Pick articles that the mouse is dragged over.
215 This must be bound to a button-down mouse event."
217 (mouse-minibuffer-check start-event)
218 (let* ((echo-keystrokes 0)
219 (start-posn (event-start start-event))
220 (start-point (posn-point start-posn))
221 (start-line (1+ (count-lines 1 start-point)))
222 (start-window (posn-window start-posn))
223 (bounds (gnus-window-edges start-window))
225 (bottom (if (window-minibuffer-p start-window)
227 ;; Don't count the mode line.
228 (1- (nth 3 bounds))))
229 (click-count (1- (event-click-count start-event))))
230 (setq mouse-selection-click-count click-count)
231 (setq mouse-selection-click-count-buffer (current-buffer))
232 (mouse-set-point start-event)
233 ;; In case the down click is in the middle of some intangible text,
234 ;; use the end of that text, and put it in START-POINT.
235 (when (< (point) start-point)
236 (goto-char start-point))
238 (setq start-point (point))
239 ;; end-of-range is used only in the single-click case.
240 ;; It is the place where the drag has reached so far
241 ;; (but not outside the window where the drag started).
242 (let (event end end-point (end-of-range (point)))
245 (setq event (cdr (gnus-read-event-char)))
246 (or (mouse-movement-p event)
247 (eq (car-safe event) 'switch-frame)))
248 (if (eq (car-safe event) 'switch-frame)
250 (setq end (event-end event)
251 end-point (posn-point end))
254 ;; Are we moving within the original window?
255 ((and (eq (posn-window end) start-window)
256 (integer-or-marker-p end-point))
257 ;; Go to START-POINT first, so that when we move to END-POINT,
258 ;; if it's in the middle of intangible text,
259 ;; point jumps in the direction away from START-POINT.
260 (goto-char start-point)
261 (goto-char end-point)
263 ;; In case the user moved his mouse really fast, pick
264 ;; articles on the line between this one and the last one.
265 (let* ((this-line (1+ (count-lines 1 end-point)))
266 (min-line (min this-line start-line))
267 (max-line (max this-line start-line)))
268 (while (< min-line max-line)
271 (setq min-line (1+ min-line)))
272 (setq start-line this-line))
273 (when (zerop (% click-count 3))
274 (setq end-of-range (point))))
276 (let ((mouse-row (cdr (cdr (mouse-position)))))
280 (mouse-scroll-subr start-window (- mouse-row top)))
281 ((>= mouse-row bottom)
282 (mouse-scroll-subr start-window
283 (1+ (- mouse-row bottom)))))))))))
285 (let ((fun (key-binding (vector (car event)))))
286 ;; Run the binding of the terminating up-event, if possible.
287 ;; In the case of a multiple click, it gives the wrong results,
288 ;; because it would fail to set up a region.
290 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
291 ;; In this case, we can just let the up-event execute normally.
292 (let ((end (event-end event)))
293 ;; Set the position in the event before we replay it,
294 ;; because otherwise it may have a position in the wrong
296 (setcar (cdr end) end-of-range)
297 ;; Delete the overlay before calling the function,
298 ;; because delete-overlay increases buffer-modified-tick.
299 (push event unread-command-events))))))))
301 (defun gnus-pick-next-page ()
302 "Go to the next page. If at the end of the buffer, start reading articles."
304 (let ((scroll-in-place nil))
307 (end-of-buffer (gnus-pick-start-reading)))))
313 (defvar gnus-binary-mode nil
314 "Minor mode for providing a binary group interface in Gnus summary buffers.")
316 (defvar gnus-binary-mode-hook nil
317 "Hook run in summary binary mode buffers.")
319 (defvar gnus-binary-mode-map nil)
321 (unless gnus-binary-mode-map
322 (setq gnus-binary-mode-map (make-sparse-keymap))
326 "g" gnus-binary-show-article))
328 (defun gnus-binary-make-menu-bar ()
329 (unless (boundp 'gnus-binary-menu)
331 gnus-binary-menu gnus-binary-mode-map ""
333 ["Switch binary mode off" gnus-binary-mode t]))))
335 (defun gnus-binary-mode (&optional arg)
336 "Minor mode for providing a binary group interface in Gnus summary buffers."
338 (when (eq major-mode 'gnus-summary-mode)
339 (make-local-variable 'gnus-binary-mode)
340 (setq gnus-binary-mode
341 (if (null arg) (not gnus-binary-mode)
342 (> (prefix-numeric-value arg) 0)))
343 (when gnus-binary-mode
344 ;; Make sure that we don't select any articles upon group entry.
345 (make-local-variable 'gnus-auto-select-first)
346 (setq gnus-auto-select-first nil)
347 (make-local-variable 'gnus-summary-display-article-function)
348 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
350 (when (gnus-visual-p 'binary-menu 'menu)
351 (gnus-binary-make-menu-bar))
352 (gnus-add-minor-mode 'gnus-binary-mode " Binary" gnus-binary-mode-map)
353 (gnus-run-hooks 'gnus-binary-mode-hook))))
355 (defun gnus-binary-display-article (article &optional all-header)
356 "Run ARTICLE through the binary decode functions."
357 (when (gnus-summary-goto-subject article)
358 (let ((gnus-view-pseudos 'automatic))
359 (gnus-uu-decode-uu))))
361 (defun gnus-binary-show-article (&optional arg)
362 "Bypass the binary functions and show the article."
364 (let (gnus-summary-display-article-function)
365 (gnus-summary-show-article arg)))
371 (defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
372 "Format of tree elements."
374 :group 'gnus-summary-tree)
376 (defcustom gnus-tree-minimize-window t
377 "If non-nil, minimize the tree buffer window.
378 If a number, never let the tree buffer grow taller than that number of
380 :type '(choice boolean
382 :group 'gnus-summary-tree)
384 (defcustom gnus-selected-tree-face 'modeline
385 "*Face used for highlighting selected articles in the thread tree."
387 :group 'gnus-summary-tree)
389 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
390 (?\{ . ?\}) (?< . ?>))
391 "Brackets used in tree nodes.")
393 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
394 "Characters used to connect parents with children.")
396 (defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
397 "*The format specification for the tree mode line."
399 :group 'gnus-summary-tree)
401 (defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
402 "*Function for generating a thread tree.
403 Two predefined functions are available:
404 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
405 :type '(radio (function-item gnus-generate-vertical-tree)
406 (function-item gnus-generate-horizontal-tree)
407 (function :tag "Other" nil))
408 :group 'gnus-summary-tree)
410 (defcustom gnus-tree-mode-hook nil
411 "*Hook run in tree mode buffers."
413 :group 'gnus-summary-tree)
415 ;;; Internal variables.
417 (defvar gnus-tree-line-format-alist
418 `((?n gnus-tmp-name ?s)
419 (?f gnus-tmp-from ?s)
420 (?N gnus-tmp-number ?d)
421 (?\[ gnus-tmp-open-bracket ?c)
422 (?\] gnus-tmp-close-bracket ?c)
423 (?s gnus-tmp-subject ?s)))
425 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
427 (defvar gnus-tree-mode-line-format-spec nil)
428 (defvar gnus-tree-line-format-spec nil)
430 (defvar gnus-tree-node-length nil)
431 (defvar gnus-selected-tree-overlay nil)
433 (defvar gnus-tree-displayed-thread nil)
435 (defvar gnus-tree-mode-map nil)
436 (put 'gnus-tree-mode 'mode-class 'special)
438 (unless gnus-tree-mode-map
439 (setq gnus-tree-mode-map (make-keymap))
440 (suppress-keymap gnus-tree-mode-map)
443 "\r" gnus-tree-select-article
444 gnus-mouse-2 gnus-tree-pick-article
445 "\C-?" gnus-tree-read-summary-keys
446 "h" gnus-tree-show-summary
448 "\C-c\C-i" gnus-info-find-node)
450 (substitute-key-definition
451 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
453 (defun gnus-tree-make-menu-bar ()
454 (unless (boundp 'gnus-tree-menu)
456 gnus-tree-menu gnus-tree-mode-map ""
458 ["Select article" gnus-tree-select-article t]))))
460 (defun gnus-tree-mode ()
461 "Major mode for displaying thread trees."
463 (gnus-set-format 'tree-mode)
464 (gnus-set-format 'tree t)
465 (when (gnus-visual-p 'tree-menu 'menu)
466 (gnus-tree-make-menu-bar))
467 (kill-all-local-variables)
468 (gnus-simplify-mode-line)
469 (setq mode-name "Tree")
470 (setq major-mode 'gnus-tree-mode)
471 (use-local-map gnus-tree-mode-map)
472 (buffer-disable-undo)
473 (setq buffer-read-only t)
474 (setq truncate-lines t)
476 (gnus-set-work-buffer)
477 (gnus-tree-node-insert (make-mail-header "") nil)
478 (setq gnus-tree-node-length (1- (point))))
479 (gnus-run-hooks 'gnus-tree-mode-hook))
481 (defun gnus-tree-read-summary-keys (&optional arg)
482 "Read a summary buffer key sequence and execute it."
484 (let ((buf (current-buffer))
486 (set-buffer gnus-article-buffer)
487 (gnus-article-read-summary-keys arg nil t)
488 (when (setq win (get-buffer-window buf))
490 (when gnus-selected-tree-overlay
491 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
492 (gnus-tree-minimize))))
494 (defun gnus-tree-show-summary ()
495 "Reconfigure windows to show summary buffer."
497 (if (not (gnus-buffer-live-p gnus-summary-buffer))
498 (error "There is no summary buffer for this tree buffer")
499 (gnus-configure-windows 'article)
500 (gnus-summary-goto-subject gnus-current-article)))
502 (defun gnus-tree-select-article (article)
503 "Select the article under point, if any."
504 (interactive (list (gnus-tree-article-number)))
505 (let ((buf (current-buffer)))
508 (set-buffer gnus-summary-buffer)
509 (gnus-summary-goto-article article))
510 (select-window (get-buffer-window buf)))))
512 (defun gnus-tree-pick-article (e)
513 "Select the article under the mouse pointer."
516 (gnus-tree-select-article (gnus-tree-article-number)))
518 (defun gnus-tree-article-number ()
519 (get-text-property (point) 'gnus-number))
521 (defun gnus-tree-article-region (article)
522 "Return a cons with BEG and END of the article region."
523 (let ((pos (text-property-any
524 (point-min) (point-max) 'gnus-number article)))
526 (cons pos (next-single-property-change pos 'gnus-number)))))
528 (defun gnus-tree-goto-article (article)
529 (let ((pos (text-property-any
530 (point-min) (point-max) 'gnus-number article)))
534 (defun gnus-tree-recenter ()
535 "Center point in the tree window."
536 (let ((selected (selected-window))
537 (tree-window (get-buffer-window gnus-tree-buffer t)))
539 (select-window tree-window)
540 (when gnus-selected-tree-overlay
541 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
542 (let* ((top (cond ((< (window-height) 4) 0)
543 ((< (window-height) 7) 1)
545 (height (1- (window-height)))
546 (bottom (save-excursion (goto-char (point-max))
547 (forward-line (- height))
549 ;; Set the window start to either `bottom', which is the biggest
550 ;; possible valid number, or the second line from the top,
551 ;; whichever is the least.
553 tree-window (min bottom (save-excursion
554 (forward-line (- top)) (point)))))
555 (select-window selected))))
557 (defun gnus-get-tree-buffer ()
558 "Return the tree buffer properly initialized."
560 (set-buffer (gnus-get-buffer-create gnus-tree-buffer))
561 (unless (eq major-mode 'gnus-tree-mode)
565 (defun gnus-tree-minimize ()
566 (when (and gnus-tree-minimize-window
567 (not (one-window-p)))
570 (walk-windows (lambda (window) (incf windows)))
573 (* window-min-height (1- windows))
575 (let* ((window-min-height 2)
576 (height (count-lines (point-min) (point-max)))
577 (min (max (1- window-min-height) height))
578 (tot (if (numberp gnus-tree-minimize-window)
579 (min gnus-tree-minimize-window min)
581 (win (get-buffer-window (current-buffer)))
582 (wh (and win (1- (window-height win)))))
583 (setq tot (min tot tot-win-height))
586 (let ((selected (selected-window)))
587 (when (ignore-errors (select-window win))
588 (enlarge-window (- tot wh))
589 (select-window selected))))))))
591 ;;; Generating the tree.
593 (defun gnus-tree-node-insert (header sparse &optional adopted)
594 (let* ((dummy (stringp header))
595 (header (if (vectorp header) header
597 (setq header (make-mail-header "*****"))
598 (mail-header-set-number header 0)
599 (mail-header-set-lines header 0)
600 (mail-header-set-chars header 0)
602 (gnus-tmp-from (mail-header-from header))
603 (gnus-tmp-subject (mail-header-subject header))
604 (gnus-tmp-number (mail-header-number header))
607 ((string-match "(.+)" gnus-tmp-from)
608 (substring gnus-tmp-from
609 (1+ (match-beginning 0)) (1- (match-end 0))))
610 ((string-match "<[^>]+> *$" gnus-tmp-from)
611 (let ((beg (match-beginning 0)))
612 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
613 (substring gnus-tmp-from (1+ (match-beginning 0))
615 (substring gnus-tmp-from 0 beg))))
616 ((memq gnus-tmp-number sparse)
619 (gnus-tmp-open-bracket
620 (cond ((memq gnus-tmp-number sparse)
621 (caadr gnus-tree-brackets))
622 (dummy (caaddr gnus-tree-brackets))
623 (adopted (car (nth 3 gnus-tree-brackets)))
624 (t (caar gnus-tree-brackets))))
625 (gnus-tmp-close-bracket
626 (cond ((memq gnus-tmp-number sparse)
627 (cdadr gnus-tree-brackets))
628 (adopted (cdr (nth 3 gnus-tree-brackets)))
630 (cdaddr gnus-tree-brackets))
631 (t (cdar gnus-tree-brackets))))
632 (buffer-read-only nil)
634 (gnus-add-text-properties
636 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
637 (list 'gnus-number gnus-tmp-number))
638 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
639 (gnus-tree-highlight-node gnus-tmp-number beg end))))
641 (defun gnus-tree-highlight-node (article beg end)
642 "Highlight current line according to `gnus-summary-highlight'."
643 (let ((list gnus-summary-highlight)
646 (set-buffer gnus-summary-buffer)
647 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
648 gnus-summary-default-score 0))
649 (default gnus-summary-default-score)
650 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
651 ;; Eval the cars of the lists until we find a match.
653 (not (eval (caar list))))
654 (setq list (cdr list)))))
655 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
656 (gnus-put-text-property-excluding-characters-with-faces
658 (if (boundp face) (symbol-value face) face)))))
660 (defun gnus-tree-indent (level)
661 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
663 (defvar gnus-tmp-limit)
664 (defvar gnus-tmp-sparse)
665 (defvar gnus-tmp-indent)
667 (defun gnus-generate-tree (thread)
668 "Generate a thread tree for THREAD."
670 (set-buffer (gnus-get-tree-buffer))
671 (let ((buffer-read-only nil)
674 (funcall gnus-generate-tree-function thread 0)
675 (gnus-set-mode-line 'tree)
676 (goto-char (point-min))
679 (let ((selected (selected-window)))
680 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
681 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
682 (gnus-horizontal-recenter)
683 (select-window selected))))))
685 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
686 "Generate a horizontal 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))
697 ;; Not the first article on the line, so we insert a "-".
698 (insert (car gnus-tree-parent-child-edges))
699 ;; If the level isn't zero, then we insert some indentation.
700 (unless (zerop level)
701 (gnus-tree-indent level)
702 (insert (cadr gnus-tree-parent-child-edges))
703 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
704 ;; Draw "|" lines upwards.
708 (eq (char-after) ? ))
710 (insert (caddr gnus-tree-parent-child-edges)))
713 ;; Insert the article node.
714 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
716 ;; End of the thread, so we go to the next line.
719 ;; Recurse downwards in all children of this article.
721 (gnus-generate-horizontal-tree
722 (pop thread) (if do (1+ level) level)
723 (or dummyp dummy) dummy)))))
725 (defsubst gnus-tree-indent-vertical ()
726 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
727 (- (point) (gnus-point-at-bol)))))
729 (insert (make-string len ? )))))
731 (defsubst gnus-tree-forward-line (n)
732 (while (>= (decf n) 0)
733 (unless (zerop (forward-line 1))
738 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
739 "Generate a vertical tree."
740 (let* ((dummy (stringp (car thread)))
743 (memq (mail-header-number (car thread))
747 ;; We don't want this article.
748 (setq thread (cdr thread))
749 (if (not (save-excursion (beginning-of-line) (bobp)))
750 ;; Not the first article on the line, so we insert a "-".
752 (gnus-tree-indent-vertical)
753 (insert (make-string (/ gnus-tree-node-length 2) ? ))
754 (insert (caddr gnus-tree-parent-child-edges))
755 (gnus-tree-forward-line 1))
756 ;; If the level isn't zero, then we insert some indentation.
757 (unless (zerop gnus-tmp-indent)
758 (gnus-tree-forward-line (1- (* 2 level)))
759 (gnus-tree-indent-vertical)
761 (insert (cadr gnus-tree-parent-child-edges))
764 ;; Draw "-" lines leftwards.
765 (while (and (> (point) 1)
766 (eq (char-after (1- (point))) ? ))
768 (insert (car gnus-tree-parent-child-edges))
771 (gnus-tree-forward-line 1)))
773 ;; Insert the article node.
774 (gnus-tree-indent-vertical)
775 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
776 (gnus-tree-forward-line 1))
778 ;; End of the thread, so we go to the next line.
780 (goto-char (point-min))
782 (incf gnus-tmp-indent))
783 ;; Recurse downwards in all children of this article.
785 (gnus-generate-vertical-tree
786 (pop thread) (if do (1+ level) level)
787 (or dummyp dummy) dummy)))))
789 ;;; Interface functions.
791 (defun gnus-possibly-generate-tree (article &optional force)
792 "Generate the thread tree for ARTICLE if it isn't displayed already."
793 (when (save-excursion
794 (set-buffer gnus-summary-buffer)
797 (vectorp (gnus-summary-article-header article))))
799 (let ((top (save-excursion
800 (set-buffer gnus-summary-buffer)
804 (gnus-summary-article-header article))
806 (gnus-tmp-limit gnus-newsgroup-limit)
807 (gnus-tmp-sparse gnus-newsgroup-sparse))
809 (not (eq top gnus-tree-displayed-thread)))
810 (gnus-generate-tree top)
811 (setq gnus-tree-displayed-thread top))))))
813 (defun gnus-tree-open (group)
814 (gnus-get-tree-buffer))
816 (defun gnus-tree-close (group)
817 (gnus-kill-buffer gnus-tree-buffer))
819 (defun gnus-highlight-selected-tree (article)
820 "Highlight the selected article in the tree."
821 (let ((buf (current-buffer))
823 (set-buffer gnus-tree-buffer)
824 (when (setq region (gnus-tree-article-region article))
825 (when (or (not gnus-selected-tree-overlay)
826 (gnus-extent-detached-p gnus-selected-tree-overlay))
827 ;; Create a new overlay.
829 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
830 'face gnus-selected-tree-face))
831 ;; Move the overlay to the article.
833 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
836 (let ((selected (selected-window)))
837 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
838 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
839 (gnus-horizontal-recenter)
840 (select-window selected))))
841 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
843 (set-buffer gnus-tree-buffer)
844 (gnus-set-mode-line 'tree))
847 (defun gnus-tree-highlight-article (article face)
849 (set-buffer (gnus-get-tree-buffer))
851 (when (setq region (gnus-tree-article-region article))
852 (gnus-put-text-property (car region) (cdr region) 'face face)
854 (get-buffer-window (current-buffer) t) (cdr region))))))
860 (defvar gnus-carpal-group-buffer-buttons
861 '(("next" . gnus-group-next-unread-group)
862 ("prev" . gnus-group-prev-unread-group)
863 ("read" . gnus-group-read-group)
864 ("select" . gnus-group-select-group)
865 ("catch-up" . gnus-group-catchup-current)
866 ("new-news" . gnus-group-get-new-news-this-group)
867 ("toggle-sub" . gnus-group-unsubscribe-current-group)
868 ("subscribe" . gnus-group-unsubscribe-group)
869 ("kill" . gnus-group-kill-group)
870 ("yank" . gnus-group-yank-group)
871 ("describe" . gnus-group-describe-group)
873 ("subscribed" . gnus-group-list-groups)
874 ("all" . gnus-group-list-all-groups)
875 ("killed" . gnus-group-list-killed)
876 ("zombies" . gnus-group-list-zombies)
877 ("matching" . gnus-group-list-matching)
878 ("post" . gnus-group-post-news)
879 ("mail" . gnus-group-mail)
880 ("rescan" . gnus-group-get-new-news)
881 ("browse-foreign" . gnus-group-browse-foreign)
882 ("exit" . gnus-group-exit)))
884 (defvar gnus-carpal-summary-buffer-buttons
886 ("read" . gnus-summary-mark-as-read-forward)
887 ("tick" . gnus-summary-tick-article-forward)
888 ("clear" . gnus-summary-clear-mark-forward)
889 ("expirable" . gnus-summary-mark-as-expirable)
891 ("scroll" . gnus-summary-next-page)
892 ("next-unread" . gnus-summary-next-unread-article)
893 ("prev-unread" . gnus-summary-prev-unread-article)
894 ("first" . gnus-summary-first-unread-article)
895 ("best" . gnus-summary-best-unread-article)
897 ("headers" . gnus-summary-toggle-header)
898 ("uudecode" . gnus-uu-decode-uu)
899 ("enter-digest" . gnus-summary-enter-digest-group)
900 ("fetch-parent" . gnus-summary-refer-parent-article)
902 ("move" . gnus-summary-move-article)
903 ("copy" . gnus-summary-copy-article)
904 ("respool" . gnus-summary-respool-article)
906 ("lower" . gnus-summary-lower-thread)
907 ("kill" . gnus-summary-kill-thread)
909 ("post" . gnus-summary-post-news)
910 ("mail" . gnus-summary-mail)
911 ("followup" . gnus-summary-followup-with-original)
912 ("reply" . gnus-summary-reply-with-original)
913 ("cancel" . gnus-summary-cancel-article)
915 ("exit" . gnus-summary-exit)
916 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
918 (defvar gnus-carpal-server-buffer-buttons
919 '(("add" . gnus-server-add-server)
920 ("browse" . gnus-server-browse-server)
921 ("list" . gnus-server-list-servers)
922 ("kill" . gnus-server-kill-server)
923 ("yank" . gnus-server-yank-server)
924 ("copy" . gnus-server-copy-server)
925 ("exit" . gnus-server-exit)))
927 (defvar gnus-carpal-browse-buffer-buttons
928 '(("subscribe" . gnus-browse-unsubscribe-current-group)
929 ("exit" . gnus-browse-exit)))
931 (defvar gnus-carpal-group-buffer "*Carpal Group*")
932 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
933 (defvar gnus-carpal-server-buffer "*Carpal Server*")
934 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
936 (defvar gnus-carpal-attached-buffer nil)
938 (defvar gnus-carpal-mode-hook nil
939 "*Hook run in carpal mode buffers.")
941 (defvar gnus-carpal-button-face 'bold
942 "*Face used on carpal buttons.")
944 (defvar gnus-carpal-header-face 'bold-italic
945 "*Face used on carpal buffer headers.")
947 (defvar gnus-carpal-mode-map nil)
948 (put 'gnus-carpal-mode 'mode-class 'special)
950 (if gnus-carpal-mode-map
952 (setq gnus-carpal-mode-map (make-keymap))
953 (suppress-keymap gnus-carpal-mode-map)
954 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
955 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
956 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
958 (defun gnus-carpal-mode ()
959 "Major mode for clicking buttons.
961 All normal editing commands are switched off.
962 \\<gnus-carpal-mode-map>
963 The following commands are available:
965 \\{gnus-carpal-mode-map}"
967 (kill-all-local-variables)
968 (setq mode-line-modified (cdr gnus-mode-line-modified))
969 (setq major-mode 'gnus-carpal-mode)
970 (setq mode-name "Gnus Carpal")
971 (setq mode-line-process nil)
972 (use-local-map gnus-carpal-mode-map)
973 (buffer-disable-undo)
974 (setq buffer-read-only t)
975 (make-local-variable 'gnus-carpal-attached-buffer)
976 (gnus-run-hooks 'gnus-carpal-mode-hook))
978 (defun gnus-carpal-setup-buffer (type)
979 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
980 (if (get-buffer buffer)
983 (set-buffer (gnus-get-buffer-create buffer))
985 (setq gnus-carpal-attached-buffer
986 (intern (format "gnus-%s-buffer" type)))
987 (let ((buttons (symbol-value
988 (intern (format "gnus-carpal-%s-buffer-buttons"
990 (buffer-read-only nil)
993 (setq button (car buttons)
994 buttons (cdr buttons))
996 (gnus-set-text-properties
998 (prog2 (insert button) (point) (insert " "))
999 (list 'face gnus-carpal-header-face))
1000 (gnus-set-text-properties
1002 (prog2 (insert (car button)) (point) (insert " "))
1003 (list 'gnus-callback (cdr button)
1004 'face gnus-carpal-button-face
1005 gnus-mouse-face-prop 'highlight))))
1006 (let ((fill-column (- (window-width) 2)))
1007 (fill-region (point-min) (point-max)))
1008 (set-window-point (get-buffer-window (current-buffer))
1011 (defun gnus-carpal-select ()
1012 "Select the button under point."
1014 (let ((func (get-text-property (point) 'gnus-callback)))
1017 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1018 (call-interactively func))))
1020 (defun gnus-carpal-mouse-select (event)
1021 "Select the button under the mouse pointer."
1023 (mouse-set-point event)
1024 (gnus-carpal-select))
1026 ;;; Allow redefinition of functions.
1029 (provide 'gnus-salt)
1031 ;;; gnus-salt.el ends here