1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2 ;; Copyright (C) 1996,97,98 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 'pick t) 'send 'exit 'postpone 'kill)))
136 (defvar gnus-pick-line-number 1)
137 (defun gnus-pick-line-number ()
138 "Return the current line number."
140 (setq gnus-pick-line-number 1)
141 (incf gnus-pick-line-number)))
143 (defun gnus-pick-start-reading (&optional catch-up)
144 "Start reading the picked articles.
145 If given a prefix, mark all unpicked articles as read."
147 (if gnus-newsgroup-processable
149 (gnus-summary-limit-to-articles nil)
150 (when (or catch-up gnus-mark-unpicked-articles-as-read)
151 (gnus-summary-limit-mark-excluded-as-read))
152 (gnus-summary-first-article)
153 (gnus-configure-windows
154 (if gnus-pick-display-summary 'article 'pick) t))
155 (if gnus-pick-elegant-flow
157 (when (or catch-up gnus-mark-unpicked-articles-as-read)
158 (gnus-summary-catchup nil t))
159 (if (gnus-group-quit-config gnus-newsgroup-name)
161 (gnus-summary-next-group)))
162 (error "No articles have been picked"))))
164 (defun gnus-pick-goto-article (arg)
165 "Go to the article number indicated by ARG. If ARG is an invalid
166 article number, then stay on current line."
169 (goto-char (point-min))
170 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
173 (gnus-error 2 "No such line: %s" arg)
176 (defun gnus-pick-article (&optional arg)
177 "Pick the article on the current line.
178 If ARG, pick the article on that line instead."
181 (gnus-pick-goto-article arg))
182 (gnus-summary-mark-as-processable 1))
184 (defun gnus-pick-article-or-thread (&optional arg)
185 "If gnus-thread-hide-subtree is t, then pick the thread on the current line.
186 Otherwise pick the article on the current line.
187 If ARG, pick the article/thread on that line instead."
190 (gnus-pick-goto-article arg))
191 (if gnus-thread-hide-subtree
192 (gnus-uu-mark-thread)
193 (gnus-summary-mark-as-processable 1)))
195 (defun gnus-pick-unmark-article-or-thread (&optional arg)
196 "If gnus-thread-hide-subtree is t, then unmark the thread on current line.
197 Otherwise unmark the article on current line.
198 If ARG, unmark thread/article on that line instead."
201 (gnus-pick-goto-article arg))
202 (if gnus-thread-hide-subtree
203 (gnus-uu-unmark-thread)
204 (gnus-summary-unmark-as-processable 1)))
206 (defun gnus-pick-mouse-pick (e)
210 (gnus-summary-mark-as-processable 1)))
212 (defun gnus-pick-mouse-pick-region (start-event)
213 "Pick articles that the mouse is dragged over.
214 This must be bound to a button-down mouse event."
216 (mouse-minibuffer-check start-event)
217 (let* ((echo-keystrokes 0)
218 (start-posn (event-start start-event))
219 (start-point (posn-point start-posn))
220 (start-line (1+ (count-lines 1 start-point)))
221 (start-window (posn-window start-posn))
222 (bounds (gnus-window-edges start-window))
224 (bottom (if (window-minibuffer-p start-window)
226 ;; Don't count the mode line.
227 (1- (nth 3 bounds))))
228 (click-count (1- (event-click-count start-event))))
229 (setq mouse-selection-click-count click-count)
230 (setq mouse-selection-click-count-buffer (current-buffer))
231 (mouse-set-point start-event)
232 ;; In case the down click is in the middle of some intangible text,
233 ;; use the end of that text, and put it in START-POINT.
234 (when (< (point) start-point)
235 (goto-char start-point))
237 (setq start-point (point))
238 ;; end-of-range is used only in the single-click case.
239 ;; It is the place where the drag has reached so far
240 ;; (but not outside the window where the drag started).
241 (let (event end end-point (end-of-range (point)))
244 (setq event (cdr (gnus-read-event-char)))
245 (or (mouse-movement-p event)
246 (eq (car-safe event) 'switch-frame)))
247 (if (eq (car-safe event) 'switch-frame)
249 (setq end (event-end event)
250 end-point (posn-point end))
253 ;; Are we moving within the original window?
254 ((and (eq (posn-window end) start-window)
255 (integer-or-marker-p end-point))
256 ;; Go to START-POINT first, so that when we move to END-POINT,
257 ;; if it's in the middle of intangible text,
258 ;; point jumps in the direction away from START-POINT.
259 (goto-char start-point)
260 (goto-char end-point)
262 ;; In case the user moved his mouse really fast, pick
263 ;; articles on the line between this one and the last one.
264 (let* ((this-line (1+ (count-lines 1 end-point)))
265 (min-line (min this-line start-line))
266 (max-line (max this-line start-line)))
267 (while (< min-line max-line)
270 (setq min-line (1+ min-line)))
271 (setq start-line this-line))
272 (when (zerop (% click-count 3))
273 (setq end-of-range (point))))
275 (let ((mouse-row (cdr (cdr (mouse-position)))))
279 (mouse-scroll-subr start-window (- mouse-row top)))
280 ((>= mouse-row bottom)
281 (mouse-scroll-subr start-window
282 (1+ (- mouse-row bottom)))))))))))
284 (let ((fun (key-binding (vector (car event)))))
285 ;; Run the binding of the terminating up-event, if possible.
286 ;; In the case of a multiple click, it gives the wrong results,
287 ;; because it would fail to set up a region.
289 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
290 ;; In this case, we can just let the up-event execute normally.
291 (let ((end (event-end event)))
292 ;; Set the position in the event before we replay it,
293 ;; because otherwise it may have a position in the wrong
295 (setcar (cdr end) end-of-range)
296 ;; Delete the overlay before calling the function,
297 ;; because delete-overlay increases buffer-modified-tick.
298 (push event unread-command-events))))))))
300 (defun gnus-pick-next-page ()
301 "Go to the next page. If at the end of the buffer, start reading articles."
303 (let ((scroll-in-place nil))
306 (end-of-buffer (gnus-pick-start-reading)))))
312 (defvar gnus-binary-mode nil
313 "Minor mode for providing a binary group interface in Gnus summary buffers.")
315 (defvar gnus-binary-mode-hook nil
316 "Hook run in summary binary mode buffers.")
318 (defvar gnus-binary-mode-map nil)
320 (unless gnus-binary-mode-map
321 (setq gnus-binary-mode-map (make-sparse-keymap))
325 "g" gnus-binary-show-article))
327 (defun gnus-binary-make-menu-bar ()
328 (unless (boundp 'gnus-binary-menu)
330 gnus-binary-menu gnus-binary-mode-map ""
332 ["Switch binary mode off" gnus-binary-mode t]))))
334 (defun gnus-binary-mode (&optional arg)
335 "Minor mode for providing a binary group interface in Gnus summary buffers."
337 (when (eq major-mode 'gnus-summary-mode)
338 (make-local-variable 'gnus-binary-mode)
339 (setq gnus-binary-mode
340 (if (null arg) (not gnus-binary-mode)
341 (> (prefix-numeric-value arg) 0)))
342 (when gnus-binary-mode
343 ;; Make sure that we don't select any articles upon group entry.
344 (make-local-variable 'gnus-auto-select-first)
345 (setq gnus-auto-select-first nil)
346 (make-local-variable 'gnus-summary-display-article-function)
347 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
349 (when (gnus-visual-p 'binary-menu 'menu)
350 (gnus-binary-make-menu-bar))
351 (gnus-add-minor-mode 'gnus-binary-mode " Binary" gnus-binary-mode-map)
352 (gnus-run-hooks 'gnus-binary-mode-hook))))
354 (defun gnus-binary-display-article (article &optional all-header)
355 "Run ARTICLE through the binary decode functions."
356 (when (gnus-summary-goto-subject article)
357 (let ((gnus-view-pseudos 'automatic))
358 (gnus-uu-decode-uu))))
360 (defun gnus-binary-show-article (&optional arg)
361 "Bypass the binary functions and show the article."
363 (let (gnus-summary-display-article-function)
364 (gnus-summary-show-article arg)))
370 (defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
371 "Format of tree elements."
373 :group 'gnus-summary-tree)
375 (defcustom gnus-tree-minimize-window t
376 "If non-nil, minimize the tree buffer window.
377 If a number, never let the tree buffer grow taller than that number of
379 :type '(choice boolean
381 :group 'gnus-summary-tree)
383 (defcustom gnus-selected-tree-face 'modeline
384 "*Face used for highlighting selected articles in the thread tree."
386 :group 'gnus-summary-tree)
388 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
389 (?\{ . ?\}) (?< . ?>))
390 "Brackets used in tree nodes.")
392 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
393 "Characters used to connect parents with children.")
395 (defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
396 "*The format specification for the tree mode line."
398 :group 'gnus-summary-tree)
400 (defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
401 "*Function for generating a thread tree.
402 Two predefined functions are available:
403 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
404 :type '(radio (function-item gnus-generate-vertical-tree)
405 (function-item gnus-generate-horizontal-tree)
406 (function :tag "Other" nil))
407 :group 'gnus-summary-tree)
409 (defcustom gnus-tree-mode-hook nil
410 "*Hook run in tree mode buffers."
412 :group 'gnus-summary-tree)
414 ;;; Internal variables.
416 (defvar gnus-tree-line-format-alist
417 `((?n gnus-tmp-name ?s)
418 (?f gnus-tmp-from ?s)
419 (?N gnus-tmp-number ?d)
420 (?\[ gnus-tmp-open-bracket ?c)
421 (?\] gnus-tmp-close-bracket ?c)
422 (?s gnus-tmp-subject ?s)))
424 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
426 (defvar gnus-tree-mode-line-format-spec nil)
427 (defvar gnus-tree-line-format-spec nil)
429 (defvar gnus-tree-node-length nil)
430 (defvar gnus-selected-tree-overlay nil)
432 (defvar gnus-tree-displayed-thread nil)
434 (defvar gnus-tree-mode-map nil)
435 (put 'gnus-tree-mode 'mode-class 'special)
437 (unless gnus-tree-mode-map
438 (setq gnus-tree-mode-map (make-keymap))
439 (suppress-keymap gnus-tree-mode-map)
442 "\r" gnus-tree-select-article
443 gnus-mouse-2 gnus-tree-pick-article
444 "\C-?" gnus-tree-read-summary-keys
445 "h" gnus-tree-show-summary
447 "\C-c\C-i" gnus-info-find-node)
449 (substitute-key-definition
450 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
452 (defun gnus-tree-make-menu-bar ()
453 (unless (boundp 'gnus-tree-menu)
455 gnus-tree-menu gnus-tree-mode-map ""
457 ["Select article" gnus-tree-select-article t]))))
459 (defun gnus-tree-mode ()
460 "Major mode for displaying thread trees."
462 (gnus-set-format 'tree-mode)
463 (gnus-set-format 'tree t)
464 (when (gnus-visual-p 'tree-menu 'menu)
465 (gnus-tree-make-menu-bar))
466 (kill-all-local-variables)
467 (gnus-simplify-mode-line)
468 (setq mode-name "Tree")
469 (setq major-mode 'gnus-tree-mode)
470 (use-local-map gnus-tree-mode-map)
471 (buffer-disable-undo (current-buffer))
472 (setq buffer-read-only t)
473 (setq truncate-lines t)
475 (gnus-set-work-buffer)
476 (gnus-tree-node-insert (make-mail-header "") nil)
477 (setq gnus-tree-node-length (1- (point))))
478 (gnus-run-hooks 'gnus-tree-mode-hook))
480 (defun gnus-tree-read-summary-keys (&optional arg)
481 "Read a summary buffer key sequence and execute it."
483 (let ((buf (current-buffer))
485 (set-buffer gnus-article-buffer)
486 (gnus-article-read-summary-keys arg nil t)
487 (when (setq win (get-buffer-window buf))
489 (when gnus-selected-tree-overlay
490 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
491 (gnus-tree-minimize))))
493 (defun gnus-tree-show-summary ()
494 "Reconfigure windows to show summary buffer."
496 (if (not (gnus-buffer-live-p gnus-summary-buffer))
497 (error "There is no summary buffer for this tree buffer")
498 (gnus-configure-windows 'article)
499 (gnus-summary-goto-subject gnus-current-article)))
501 (defun gnus-tree-select-article (article)
502 "Select the article under point, if any."
503 (interactive (list (gnus-tree-article-number)))
504 (let ((buf (current-buffer)))
507 (set-buffer gnus-summary-buffer)
508 (gnus-summary-goto-article article))
509 (select-window (get-buffer-window buf)))))
511 (defun gnus-tree-pick-article (e)
512 "Select the article under the mouse pointer."
515 (gnus-tree-select-article (gnus-tree-article-number)))
517 (defun gnus-tree-article-number ()
518 (get-text-property (point) 'gnus-number))
520 (defun gnus-tree-article-region (article)
521 "Return a cons with BEG and END of the article region."
522 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
524 (cons pos (next-single-property-change pos 'gnus-number)))))
526 (defun gnus-tree-goto-article (article)
527 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
531 (defun gnus-tree-recenter ()
532 "Center point in the tree window."
533 (let ((selected (selected-window))
534 (tree-window (get-buffer-window gnus-tree-buffer t)))
536 (select-window tree-window)
537 (when gnus-selected-tree-overlay
538 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
539 (let* ((top (cond ((< (window-height) 4) 0)
540 ((< (window-height) 7) 1)
542 (height (1- (window-height)))
543 (bottom (save-excursion (goto-char (point-max))
544 (forward-line (- height))
546 ;; Set the window start to either `bottom', which is the biggest
547 ;; possible valid number, or the second line from the top,
548 ;; whichever is the least.
550 tree-window (min bottom (save-excursion
551 (forward-line (- top)) (point)))))
552 (select-window selected))))
554 (defun gnus-get-tree-buffer ()
555 "Return the tree buffer properly initialized."
557 (set-buffer (gnus-get-buffer-create gnus-tree-buffer))
558 (unless (eq major-mode 'gnus-tree-mode)
562 (defun gnus-tree-minimize ()
563 (when (and gnus-tree-minimize-window
564 (not (one-window-p)))
567 (walk-windows (lambda (window) (incf windows)))
570 (* window-min-height (1- windows))
572 (let* ((window-min-height 2)
573 (height (count-lines (point-min) (point-max)))
574 (min (max (1- window-min-height) height))
575 (tot (if (numberp gnus-tree-minimize-window)
576 (min gnus-tree-minimize-window min)
578 (win (get-buffer-window (current-buffer)))
579 (wh (and win (1- (window-height win)))))
580 (setq tot (min tot tot-win-height))
583 (let ((selected (selected-window)))
584 (when (ignore-errors (select-window win))
585 (enlarge-window (- tot wh))
586 (select-window selected))))))))
588 ;;; Generating the tree.
590 (defun gnus-tree-node-insert (header sparse &optional adopted)
591 (let* ((dummy (stringp header))
592 (header (if (vectorp header) header
594 (setq header (make-mail-header "*****"))
595 (mail-header-set-number header 0)
596 (mail-header-set-lines header 0)
597 (mail-header-set-chars header 0)
599 (gnus-tmp-from (mail-header-from header))
600 (gnus-tmp-subject (mail-header-subject header))
601 (gnus-tmp-number (mail-header-number header))
604 ((string-match "(.+)" gnus-tmp-from)
605 (substring gnus-tmp-from
606 (1+ (match-beginning 0)) (1- (match-end 0))))
607 ((string-match "<[^>]+> *$" gnus-tmp-from)
608 (let ((beg (match-beginning 0)))
609 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
610 (substring gnus-tmp-from (1+ (match-beginning 0))
612 (substring gnus-tmp-from 0 beg))))
613 ((memq gnus-tmp-number sparse)
616 (gnus-tmp-open-bracket
617 (cond ((memq gnus-tmp-number sparse)
618 (caadr gnus-tree-brackets))
619 (dummy (caaddr gnus-tree-brackets))
620 (adopted (car (nth 3 gnus-tree-brackets)))
621 (t (caar gnus-tree-brackets))))
622 (gnus-tmp-close-bracket
623 (cond ((memq gnus-tmp-number sparse)
624 (cdadr gnus-tree-brackets))
625 (adopted (cdr (nth 3 gnus-tree-brackets)))
627 (cdaddr gnus-tree-brackets))
628 (t (cdar gnus-tree-brackets))))
629 (buffer-read-only nil)
631 (gnus-add-text-properties
633 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
634 (list 'gnus-number gnus-tmp-number))
635 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
636 (gnus-tree-highlight-node gnus-tmp-number beg end))))
638 (defun gnus-tree-highlight-node (article beg end)
639 "Highlight current line according to `gnus-summary-highlight'."
640 (let ((list gnus-summary-highlight)
643 (set-buffer gnus-summary-buffer)
644 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
645 gnus-summary-default-score 0))
646 (default gnus-summary-default-score)
647 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
648 ;; Eval the cars of the lists until we find a match.
650 (not (eval (caar list))))
651 (setq list (cdr list)))))
652 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
653 (gnus-put-text-property-excluding-characters-with-faces
655 (if (boundp face) (symbol-value face) face)))))
657 (defun gnus-tree-indent (level)
658 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
660 (defvar gnus-tmp-limit)
661 (defvar gnus-tmp-sparse)
662 (defvar gnus-tmp-indent)
664 (defun gnus-generate-tree (thread)
665 "Generate a thread tree for THREAD."
667 (set-buffer (gnus-get-tree-buffer))
668 (let ((buffer-read-only nil)
671 (funcall gnus-generate-tree-function thread 0)
672 (gnus-set-mode-line 'tree)
673 (goto-char (point-min))
676 (let ((selected (selected-window)))
677 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
678 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
679 (gnus-horizontal-recenter)
680 (select-window selected))))))
682 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
683 "Generate a horizontal tree."
684 (let* ((dummy (stringp (car thread)))
687 (memq (mail-header-number (car thread))
691 ;; We don't want this article.
692 (setq thread (cdr thread))
694 ;; Not the first article on the line, so we insert a "-".
695 (insert (car gnus-tree-parent-child-edges))
696 ;; If the level isn't zero, then we insert some indentation.
697 (unless (zerop level)
698 (gnus-tree-indent level)
699 (insert (cadr gnus-tree-parent-child-edges))
700 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
701 ;; Draw "|" lines upwards.
705 (= (following-char) ? ))
707 (insert (caddr gnus-tree-parent-child-edges)))
710 ;; Insert the article node.
711 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
713 ;; End of the thread, so we go to the next line.
716 ;; Recurse downwards in all children of this article.
718 (gnus-generate-horizontal-tree
719 (pop thread) (if do (1+ level) level)
720 (or dummyp dummy) dummy)))))
722 (defsubst gnus-tree-indent-vertical ()
723 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
724 (- (point) (gnus-point-at-bol)))))
726 (insert (make-string len ? )))))
728 (defsubst gnus-tree-forward-line (n)
729 (while (>= (decf n) 0)
730 (unless (zerop (forward-line 1))
735 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
736 "Generate a vertical tree."
737 (let* ((dummy (stringp (car thread)))
740 (memq (mail-header-number (car thread))
744 ;; We don't want this article.
745 (setq thread (cdr thread))
746 (if (not (save-excursion (beginning-of-line) (bobp)))
747 ;; Not the first article on the line, so we insert a "-".
749 (gnus-tree-indent-vertical)
750 (insert (make-string (/ gnus-tree-node-length 2) ? ))
751 (insert (caddr gnus-tree-parent-child-edges))
752 (gnus-tree-forward-line 1))
753 ;; If the level isn't zero, then we insert some indentation.
754 (unless (zerop gnus-tmp-indent)
755 (gnus-tree-forward-line (1- (* 2 level)))
756 (gnus-tree-indent-vertical)
758 (insert (cadr gnus-tree-parent-child-edges))
761 ;; Draw "-" lines leftwards.
762 (while (and (> (point) 1)
763 (= (char-after (1- (point))) ? ))
765 (insert (car gnus-tree-parent-child-edges))
768 (gnus-tree-forward-line 1)))
770 ;; Insert the article node.
771 (gnus-tree-indent-vertical)
772 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
773 (gnus-tree-forward-line 1))
775 ;; End of the thread, so we go to the next line.
777 (goto-char (point-min))
779 (incf gnus-tmp-indent))
780 ;; Recurse downwards in all children of this article.
782 (gnus-generate-vertical-tree
783 (pop thread) (if do (1+ level) level)
784 (or dummyp dummy) dummy)))))
786 ;;; Interface functions.
788 (defun gnus-possibly-generate-tree (article &optional force)
789 "Generate the thread tree for ARTICLE if it isn't displayed already."
790 (when (save-excursion
791 (set-buffer gnus-summary-buffer)
794 (vectorp (gnus-summary-article-header article))))
796 (let ((top (save-excursion
797 (set-buffer gnus-summary-buffer)
801 (gnus-summary-article-header article))
803 (gnus-tmp-limit gnus-newsgroup-limit)
804 (gnus-tmp-sparse gnus-newsgroup-sparse))
806 (not (eq top gnus-tree-displayed-thread)))
807 (gnus-generate-tree top)
808 (setq gnus-tree-displayed-thread top))))))
810 (defun gnus-tree-open (group)
811 (gnus-get-tree-buffer))
813 (defun gnus-tree-close (group)
814 (gnus-kill-buffer gnus-tree-buffer))
816 (defun gnus-highlight-selected-tree (article)
817 "Highlight the selected article in the tree."
818 (let ((buf (current-buffer))
820 (set-buffer gnus-tree-buffer)
821 (when (setq region (gnus-tree-article-region article))
822 (when (or (not gnus-selected-tree-overlay)
823 (gnus-extent-detached-p gnus-selected-tree-overlay))
824 ;; Create a new overlay.
826 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
827 'face gnus-selected-tree-face))
828 ;; Move the overlay to the article.
830 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
833 (let ((selected (selected-window)))
834 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
835 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
836 (gnus-horizontal-recenter)
837 (select-window selected))))
838 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
840 (set-buffer gnus-tree-buffer)
841 (gnus-set-mode-line 'tree))
844 (defun gnus-tree-highlight-article (article face)
846 (set-buffer (gnus-get-tree-buffer))
848 (when (setq region (gnus-tree-article-region article))
849 (gnus-put-text-property (car region) (cdr region) 'face face)
851 (get-buffer-window (current-buffer) t) (cdr region))))))
857 (defvar gnus-carpal-group-buffer-buttons
858 '(("next" . gnus-group-next-unread-group)
859 ("prev" . gnus-group-prev-unread-group)
860 ("read" . gnus-group-read-group)
861 ("select" . gnus-group-select-group)
862 ("catch-up" . gnus-group-catchup-current)
863 ("new-news" . gnus-group-get-new-news-this-group)
864 ("toggle-sub" . gnus-group-unsubscribe-current-group)
865 ("subscribe" . gnus-group-unsubscribe-group)
866 ("kill" . gnus-group-kill-group)
867 ("yank" . gnus-group-yank-group)
868 ("describe" . gnus-group-describe-group)
870 ("subscribed" . gnus-group-list-groups)
871 ("all" . gnus-group-list-all-groups)
872 ("killed" . gnus-group-list-killed)
873 ("zombies" . gnus-group-list-zombies)
874 ("matching" . gnus-group-list-matching)
875 ("post" . gnus-group-post-news)
876 ("mail" . gnus-group-mail)
877 ("rescan" . gnus-group-get-new-news)
878 ("browse-foreign" . gnus-group-browse-foreign)
879 ("exit" . gnus-group-exit)))
881 (defvar gnus-carpal-summary-buffer-buttons
883 ("read" . gnus-summary-mark-as-read-forward)
884 ("tick" . gnus-summary-tick-article-forward)
885 ("clear" . gnus-summary-clear-mark-forward)
886 ("expirable" . gnus-summary-mark-as-expirable)
888 ("scroll" . gnus-summary-next-page)
889 ("next-unread" . gnus-summary-next-unread-article)
890 ("prev-unread" . gnus-summary-prev-unread-article)
891 ("first" . gnus-summary-first-unread-article)
892 ("best" . gnus-summary-best-unread-article)
894 ("headers" . gnus-summary-toggle-header)
895 ("uudecode" . gnus-uu-decode-uu)
896 ("enter-digest" . gnus-summary-enter-digest-group)
897 ("fetch-parent" . gnus-summary-refer-parent-article)
899 ("move" . gnus-summary-move-article)
900 ("copy" . gnus-summary-copy-article)
901 ("respool" . gnus-summary-respool-article)
903 ("lower" . gnus-summary-lower-thread)
904 ("kill" . gnus-summary-kill-thread)
906 ("post" . gnus-summary-post-news)
907 ("mail" . gnus-summary-mail)
908 ("followup" . gnus-summary-followup-with-original)
909 ("reply" . gnus-summary-reply-with-original)
910 ("cancel" . gnus-summary-cancel-article)
912 ("exit" . gnus-summary-exit)
913 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
915 (defvar gnus-carpal-server-buffer-buttons
916 '(("add" . gnus-server-add-server)
917 ("browse" . gnus-server-browse-server)
918 ("list" . gnus-server-list-servers)
919 ("kill" . gnus-server-kill-server)
920 ("yank" . gnus-server-yank-server)
921 ("copy" . gnus-server-copy-server)
922 ("exit" . gnus-server-exit)))
924 (defvar gnus-carpal-browse-buffer-buttons
925 '(("subscribe" . gnus-browse-unsubscribe-current-group)
926 ("exit" . gnus-browse-exit)))
928 (defvar gnus-carpal-group-buffer "*Carpal Group*")
929 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
930 (defvar gnus-carpal-server-buffer "*Carpal Server*")
931 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
933 (defvar gnus-carpal-attached-buffer nil)
935 (defvar gnus-carpal-mode-hook nil
936 "*Hook run in carpal mode buffers.")
938 (defvar gnus-carpal-button-face 'bold
939 "*Face used on carpal buttons.")
941 (defvar gnus-carpal-header-face 'bold-italic
942 "*Face used on carpal buffer headers.")
944 (defvar gnus-carpal-mode-map nil)
945 (put 'gnus-carpal-mode 'mode-class 'special)
947 (if gnus-carpal-mode-map
949 (setq gnus-carpal-mode-map (make-keymap))
950 (suppress-keymap gnus-carpal-mode-map)
951 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
952 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
953 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
955 (defun gnus-carpal-mode ()
956 "Major mode for clicking buttons.
958 All normal editing commands are switched off.
959 \\<gnus-carpal-mode-map>
960 The following commands are available:
962 \\{gnus-carpal-mode-map}"
964 (kill-all-local-variables)
965 (setq mode-line-modified (cdr gnus-mode-line-modified))
966 (setq major-mode 'gnus-carpal-mode)
967 (setq mode-name "Gnus Carpal")
968 (setq mode-line-process nil)
969 (use-local-map gnus-carpal-mode-map)
970 (buffer-disable-undo (current-buffer))
971 (setq buffer-read-only t)
972 (make-local-variable 'gnus-carpal-attached-buffer)
973 (gnus-run-hooks 'gnus-carpal-mode-hook))
975 (defun gnus-carpal-setup-buffer (type)
976 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
977 (if (get-buffer buffer)
980 (set-buffer (gnus-get-buffer-create buffer))
982 (setq gnus-carpal-attached-buffer
983 (intern (format "gnus-%s-buffer" type)))
984 (let ((buttons (symbol-value
985 (intern (format "gnus-carpal-%s-buffer-buttons"
987 (buffer-read-only nil)
990 (setq button (car buttons)
991 buttons (cdr buttons))
993 (gnus-set-text-properties
995 (prog2 (insert button) (point) (insert " "))
996 (list 'face gnus-carpal-header-face))
997 (gnus-set-text-properties
999 (prog2 (insert (car button)) (point) (insert " "))
1000 (list 'gnus-callback (cdr button)
1001 'face gnus-carpal-button-face
1002 gnus-mouse-face-prop 'highlight))))
1003 (let ((fill-column (- (window-width) 2)))
1004 (fill-region (point-min) (point-max)))
1005 (set-window-point (get-buffer-window (current-buffer))
1008 (defun gnus-carpal-select ()
1009 "Select the button under point."
1011 (let ((func (get-text-property (point) 'gnus-callback)))
1014 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1015 (call-interactively func))))
1017 (defun gnus-carpal-mouse-select (event)
1018 "Select the button under the mouse pointer."
1020 (mouse-set-point event)
1021 (gnus-carpal-select))
1023 ;;; Allow redefinition of functions.
1026 (provide 'gnus-salt)
1028 ;;; gnus-salt.el ends here