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))
36 (defvar gnus-pick-mode nil
37 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
39 (defcustom gnus-pick-display-summary nil
40 "*Display summary while reading."
42 :group 'gnus-summary-pick)
44 (defcustom gnus-pick-mode-hook nil
45 "Hook run in summary pick mode buffers."
47 :group 'gnus-summary-pick)
49 (defcustom gnus-mark-unpicked-articles-as-read nil
50 "*If non-nil, mark all unpicked articles as read."
52 :group 'gnus-summary-pick)
54 (defcustom gnus-pick-elegant-flow t
55 "If non-nil, gnus-pick-start-reading will run gnus-summary-next-group when no articles have been picked."
57 :group 'gnus-summary-pick)
59 (defcustom gnus-summary-pick-line-format
60 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
61 "*The format specification of the lines in pick buffers.
62 It accepts the same format specs that `gnus-summary-line-format' does."
64 :group 'gnus-summary-pick)
66 ;;; Internal variables.
68 (defvar gnus-pick-mode-map nil)
70 (unless gnus-pick-mode-map
71 (setq gnus-pick-mode-map (make-sparse-keymap))
73 (gnus-define-keys gnus-pick-mode-map
74 " " gnus-pick-next-page
75 "u" gnus-pick-unmark-article-or-thread
76 "." gnus-pick-article-or-thread
77 gnus-down-mouse-2 gnus-pick-mouse-pick-region
78 "\r" gnus-pick-start-reading))
80 (defun gnus-pick-make-menu-bar ()
81 (unless (boundp 'gnus-pick-menu)
83 gnus-pick-menu gnus-pick-mode-map ""
86 ["Article" gnus-summary-mark-as-processable t]
87 ["Thread" gnus-uu-mark-thread t]
88 ["Region" gnus-uu-mark-region t]
89 ["Regexp" gnus-uu-mark-by-regexp t]
90 ["Buffer" gnus-uu-mark-buffer t])
92 ["Article" gnus-summary-unmark-as-processable t]
93 ["Thread" gnus-uu-unmark-thread t]
94 ["Region" gnus-uu-unmark-region t]
95 ["Regexp" gnus-uu-unmark-by-regexp t]
96 ["Buffer" gnus-summary-unmark-all-processable t])
97 ["Start reading" gnus-pick-start-reading t]
98 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
100 (defun gnus-pick-mode (&optional arg)
101 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
103 \\{gnus-pick-mode-map}"
105 (when (eq major-mode 'gnus-summary-mode)
106 (if (not (set (make-local-variable 'gnus-pick-mode)
107 (if (null arg) (not gnus-pick-mode)
108 (> (prefix-numeric-value arg) 0))))
109 (remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
110 ;; Make sure that we don't select any articles upon group entry.
111 (set (make-local-variable 'gnus-auto-select-first) nil)
112 ;; Change line format.
113 (setq gnus-summary-line-format gnus-summary-pick-line-format)
114 (setq gnus-summary-line-format-spec nil)
115 (gnus-update-format-specifications nil 'summary)
116 (gnus-update-summary-mark-positions)
117 (add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
118 (set (make-local-variable 'gnus-summary-goto-unread) 'never)
120 (when (gnus-visual-p 'pick-menu 'menu)
121 (gnus-pick-make-menu-bar))
122 (gnus-add-minor-mode 'gnus-pick-mode " Pick" gnus-pick-mode-map)
123 (gnus-run-hooks 'gnus-pick-mode-hook))))
125 (defun gnus-pick-setup-message ()
126 "Make Message do the right thing on exit."
127 (when (and (gnus-buffer-live-p gnus-summary-buffer)
129 (set-buffer gnus-summary-buffer)
132 '(gnus-configure-windows ,gnus-current-window-configuration t)
133 'send 'exit 'postpone 'kill)))
135 (defvar gnus-pick-line-number 1)
136 (defun gnus-pick-line-number ()
137 "Return the current line number."
139 (setq gnus-pick-line-number 1)
140 (incf gnus-pick-line-number)))
142 (defun gnus-pick-start-reading (&optional catch-up)
143 "Start reading the picked articles.
144 If given a prefix, mark all unpicked articles as read."
146 (if gnus-newsgroup-processable
148 (gnus-summary-limit-to-articles nil)
149 (when (or catch-up gnus-mark-unpicked-articles-as-read)
150 (gnus-summary-limit-mark-excluded-as-read))
151 (gnus-summary-first-article)
152 (gnus-configure-windows
153 (if gnus-pick-display-summary 'article 'pick) t))
154 (if gnus-pick-elegant-flow
156 (when (or catch-up gnus-mark-unpicked-articles-as-read)
157 (gnus-summary-catchup nil t))
158 (if (gnus-group-quit-config gnus-newsgroup-name)
160 (gnus-summary-next-group)))
161 (error "No articles have been picked"))))
163 (defun gnus-pick-goto-article (arg)
164 "Go to the article number indicated by ARG. If ARG is an invalid
165 article number, then stay on current line."
168 (goto-char (point-min))
169 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
172 (gnus-error 2 "No such line: %s" arg)
175 (defun gnus-pick-article (&optional arg)
176 "Pick the article on the current line.
177 If ARG, pick the article on that line instead."
180 (gnus-pick-goto-article arg))
181 (gnus-summary-mark-as-processable 1))
183 (defun gnus-pick-article-or-thread (&optional arg)
184 "If gnus-thread-hide-subtree is t, then pick the thread on the current line.
185 Otherwise pick the article on the current line.
186 If ARG, pick the article/thread on that line instead."
189 (gnus-pick-goto-article arg))
190 (if gnus-thread-hide-subtree
193 (gnus-uu-mark-thread))
195 (gnus-summary-mark-as-processable 1)))
197 (defun gnus-pick-unmark-article-or-thread (&optional arg)
198 "If gnus-thread-hide-subtree is t, then unmark the thread on current line.
199 Otherwise unmark the article on current line.
200 If ARG, unmark thread/article on that line instead."
203 (gnus-pick-goto-article arg))
204 (if gnus-thread-hide-subtree
206 (gnus-uu-unmark-thread))
207 (gnus-summary-unmark-as-processable 1)))
209 (defun gnus-pick-mouse-pick (e)
213 (gnus-summary-mark-as-processable 1)))
215 (defun gnus-pick-mouse-pick-region (start-event)
216 "Pick articles that the mouse is dragged over.
217 This must be bound to a button-down mouse event."
219 (mouse-minibuffer-check start-event)
220 (let* ((echo-keystrokes 0)
221 (start-posn (event-start start-event))
222 (start-point (posn-point start-posn))
223 (start-line (1+ (count-lines 1 start-point)))
224 (start-window (posn-window start-posn))
225 (bounds (gnus-window-edges start-window))
227 (bottom (if (window-minibuffer-p start-window)
229 ;; Don't count the mode line.
230 (1- (nth 3 bounds))))
231 (click-count (1- (event-click-count start-event))))
232 (setq mouse-selection-click-count click-count)
233 (setq mouse-selection-click-count-buffer (current-buffer))
234 (mouse-set-point start-event)
235 ;; In case the down click is in the middle of some intangible text,
236 ;; use the end of that text, and put it in START-POINT.
237 (when (< (point) start-point)
238 (goto-char start-point))
240 (setq start-point (point))
241 ;; end-of-range is used only in the single-click case.
242 ;; It is the place where the drag has reached so far
243 ;; (but not outside the window where the drag started).
244 (let (event end end-point (end-of-range (point)))
247 (setq event (cdr (gnus-read-event-char)))
248 (or (mouse-movement-p event)
249 (eq (car-safe event) 'switch-frame)))
250 (if (eq (car-safe event) 'switch-frame)
252 (setq end (event-end event)
253 end-point (posn-point end))
256 ;; Are we moving within the original window?
257 ((and (eq (posn-window end) start-window)
258 (integer-or-marker-p end-point))
259 ;; Go to START-POINT first, so that when we move to END-POINT,
260 ;; if it's in the middle of intangible text,
261 ;; point jumps in the direction away from START-POINT.
262 (goto-char start-point)
263 (goto-char end-point)
265 ;; In case the user moved his mouse really fast, pick
266 ;; articles on the line between this one and the last one.
267 (let* ((this-line (1+ (count-lines 1 end-point)))
268 (min-line (min this-line start-line))
269 (max-line (max this-line start-line)))
270 (while (< min-line max-line)
273 (setq min-line (1+ min-line)))
274 (setq start-line this-line))
275 (when (zerop (% click-count 3))
276 (setq end-of-range (point))))
278 (let ((mouse-row (cdr (cdr (mouse-position)))))
282 (mouse-scroll-subr start-window (- mouse-row top)))
283 ((>= mouse-row bottom)
284 (mouse-scroll-subr start-window
285 (1+ (- mouse-row bottom)))))))))))
287 (let ((fun (key-binding (vector (car event)))))
288 ;; Run the binding of the terminating up-event, if possible.
289 ;; In the case of a multiple click, it gives the wrong results,
290 ;; because it would fail to set up a region.
292 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
293 ;; In this case, we can just let the up-event execute normally.
294 (let ((end (event-end event)))
295 ;; Set the position in the event before we replay it,
296 ;; because otherwise it may have a position in the wrong
298 (setcar (cdr end) end-of-range)
299 ;; Delete the overlay before calling the function,
300 ;; because delete-overlay increases buffer-modified-tick.
301 (push event unread-command-events))))))))
303 (defun gnus-pick-next-page ()
304 "Go to the next page. If at the end of the buffer, start reading articles."
306 (let ((scroll-in-place nil))
309 (end-of-buffer (gnus-pick-start-reading)))))
315 (defvar gnus-binary-mode nil
316 "Minor mode for providing a binary group interface in Gnus summary buffers.")
318 (defvar gnus-binary-mode-hook nil
319 "Hook run in summary binary mode buffers.")
321 (defvar gnus-binary-mode-map nil)
323 (unless gnus-binary-mode-map
324 (setq gnus-binary-mode-map (make-sparse-keymap))
328 "g" gnus-binary-show-article))
330 (defun gnus-binary-make-menu-bar ()
331 (unless (boundp 'gnus-binary-menu)
333 gnus-binary-menu gnus-binary-mode-map ""
335 ["Switch binary mode off" gnus-binary-mode t]))))
337 (defun gnus-binary-mode (&optional arg)
338 "Minor mode for providing a binary group interface in Gnus summary buffers."
340 (when (eq major-mode 'gnus-summary-mode)
341 (make-local-variable 'gnus-binary-mode)
342 (setq gnus-binary-mode
343 (if (null arg) (not gnus-binary-mode)
344 (> (prefix-numeric-value arg) 0)))
345 (when gnus-binary-mode
346 ;; Make sure that we don't select any articles upon group entry.
347 (make-local-variable 'gnus-auto-select-first)
348 (setq gnus-auto-select-first nil)
349 (make-local-variable 'gnus-summary-display-article-function)
350 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
352 (when (gnus-visual-p 'binary-menu 'menu)
353 (gnus-binary-make-menu-bar))
354 (gnus-add-minor-mode 'gnus-binary-mode " Binary" gnus-binary-mode-map)
355 (gnus-run-hooks 'gnus-binary-mode-hook))))
357 (defun gnus-binary-display-article (article &optional all-header)
358 "Run ARTICLE through the binary decode functions."
359 (when (gnus-summary-goto-subject article)
360 (let ((gnus-view-pseudos 'automatic))
361 (gnus-uu-decode-uu))))
363 (defun gnus-binary-show-article (&optional arg)
364 "Bypass the binary functions and show the article."
366 (let (gnus-summary-display-article-function)
367 (gnus-summary-show-article arg)))
373 (defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
374 "Format of tree elements."
376 :group 'gnus-summary-tree)
378 (defcustom gnus-tree-minimize-window t
379 "If non-nil, minimize the tree buffer window.
380 If a number, never let the tree buffer grow taller than that number of
382 :type '(choice boolean
384 :group 'gnus-summary-tree)
386 (defcustom gnus-selected-tree-face 'modeline
387 "*Face used for highlighting selected articles in the thread tree."
389 :group 'gnus-summary-tree)
391 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
392 (?\{ . ?\}) (?< . ?>))
393 "Brackets used in tree nodes.")
395 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
396 "Characters used to connect parents with children.")
398 (defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
399 "*The format specification for the tree mode line."
401 :group 'gnus-summary-tree)
403 (defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
404 "*Function for generating a thread tree.
405 Two predefined functions are available:
406 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
407 :type '(radio (function-item gnus-generate-vertical-tree)
408 (function-item gnus-generate-horizontal-tree)
409 (function :tag "Other" nil))
410 :group 'gnus-summary-tree)
412 (defcustom gnus-tree-mode-hook nil
413 "*Hook run in tree mode buffers."
415 :group 'gnus-summary-tree)
417 ;;; Internal variables.
419 (defvar gnus-tree-line-format-alist
420 `((?n gnus-tmp-name ?s)
421 (?f gnus-tmp-from ?s)
422 (?N gnus-tmp-number ?d)
423 (?\[ gnus-tmp-open-bracket ?c)
424 (?\] gnus-tmp-close-bracket ?c)
425 (?s gnus-tmp-subject ?s)))
427 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
429 (defvar gnus-tree-mode-line-format-spec nil)
430 (defvar gnus-tree-line-format-spec nil)
432 (defvar gnus-tree-node-length nil)
433 (defvar gnus-selected-tree-overlay nil)
435 (defvar gnus-tree-displayed-thread nil)
436 (defvar gnus-tree-inhibit nil)
438 (defvar gnus-tree-mode-map nil)
439 (put 'gnus-tree-mode 'mode-class 'special)
441 (unless gnus-tree-mode-map
442 (setq gnus-tree-mode-map (make-keymap))
443 (suppress-keymap gnus-tree-mode-map)
446 "\r" gnus-tree-select-article
447 gnus-mouse-2 gnus-tree-pick-article
448 "\C-?" gnus-tree-read-summary-keys
449 "h" gnus-tree-show-summary
451 "\C-c\C-i" gnus-info-find-node)
453 (substitute-key-definition
454 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
456 (defun gnus-tree-make-menu-bar ()
457 (unless (boundp 'gnus-tree-menu)
459 gnus-tree-menu gnus-tree-mode-map ""
461 ["Select article" gnus-tree-select-article t]))))
463 (defun gnus-tree-mode ()
464 "Major mode for displaying thread trees."
466 (gnus-set-format 'tree-mode)
467 (gnus-set-format 'tree t)
468 (when (gnus-visual-p 'tree-menu 'menu)
469 (gnus-tree-make-menu-bar))
470 (kill-all-local-variables)
471 (gnus-simplify-mode-line)
472 (setq mode-name "Tree")
473 (setq major-mode 'gnus-tree-mode)
474 (use-local-map gnus-tree-mode-map)
475 (buffer-disable-undo)
476 (setq buffer-read-only t)
477 (setq truncate-lines t)
479 (gnus-set-work-buffer)
480 (gnus-tree-node-insert (make-mail-header "") nil)
481 (setq gnus-tree-node-length (1- (point))))
482 (gnus-run-hooks 'gnus-tree-mode-hook))
484 (defun gnus-tree-read-summary-keys (&optional arg)
485 "Read a summary buffer key sequence and execute it."
487 (unless gnus-tree-inhibit
488 (let ((buf (current-buffer))
489 (gnus-tree-inhibit t)
491 (set-buffer gnus-article-buffer)
492 (gnus-article-read-summary-keys arg nil t)
493 (when (setq win (get-buffer-window buf))
495 (when gnus-selected-tree-overlay
496 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
497 (gnus-tree-minimize)))))
499 (defun gnus-tree-show-summary ()
500 "Reconfigure windows to show summary buffer."
502 (if (not (gnus-buffer-live-p gnus-summary-buffer))
503 (error "There is no summary buffer for this tree buffer")
504 (gnus-configure-windows 'article)
505 (gnus-summary-goto-subject gnus-current-article)))
507 (defun gnus-tree-select-article (article)
508 "Select the article under point, if any."
509 (interactive (list (gnus-tree-article-number)))
510 (let ((buf (current-buffer)))
513 (set-buffer gnus-summary-buffer)
514 (gnus-summary-goto-article article))
515 (select-window (get-buffer-window buf)))))
517 (defun gnus-tree-pick-article (e)
518 "Select the article under the mouse pointer."
521 (gnus-tree-select-article (gnus-tree-article-number)))
523 (defun gnus-tree-article-number ()
524 (get-text-property (point) 'gnus-number))
526 (defun gnus-tree-article-region (article)
527 "Return a cons with BEG and END of the article region."
528 (let ((pos (text-property-any
529 (point-min) (point-max) 'gnus-number article)))
531 (cons pos (next-single-property-change pos 'gnus-number)))))
533 (defun gnus-tree-goto-article (article)
534 (let ((pos (text-property-any
535 (point-min) (point-max) 'gnus-number article)))
539 (defun gnus-tree-recenter ()
540 "Center point in the tree window."
541 (let ((selected (selected-window))
542 (tree-window (get-buffer-window gnus-tree-buffer t)))
544 (select-window tree-window)
545 (when gnus-selected-tree-overlay
546 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
547 (let* ((top (cond ((< (window-height) 4) 0)
548 ((< (window-height) 7) 1)
550 (height (1- (window-height)))
551 (bottom (save-excursion (goto-char (point-max))
552 (forward-line (- height))
554 ;; Set the window start to either `bottom', which is the biggest
555 ;; possible valid number, or the second line from the top,
556 ;; whichever is the least.
558 tree-window (min bottom (save-excursion
559 (forward-line (- top)) (point)))))
560 (select-window selected))))
562 (defun gnus-get-tree-buffer ()
563 "Return the tree buffer properly initialized."
565 (set-buffer (gnus-get-buffer-create gnus-tree-buffer))
566 (unless (eq major-mode 'gnus-tree-mode)
570 (defun gnus-tree-minimize ()
571 (when (and gnus-tree-minimize-window
572 (not (one-window-p)))
575 (walk-windows (lambda (window) (incf windows)))
578 (* window-min-height (1- windows))
580 (let* ((window-min-height 2)
581 (height (count-lines (point-min) (point-max)))
582 (min (max (1- window-min-height) height))
583 (tot (if (numberp gnus-tree-minimize-window)
584 (min gnus-tree-minimize-window min)
586 (win (get-buffer-window (current-buffer)))
587 (wh (and win (1- (window-height win)))))
588 (setq tot (min tot tot-win-height))
591 (let ((selected (selected-window)))
592 (when (ignore-errors (select-window win))
593 (enlarge-window (- tot wh))
594 (select-window selected))))))))
596 ;;; Generating the tree.
598 (defun gnus-tree-node-insert (header sparse &optional adopted)
599 (let* ((dummy (stringp header))
600 (header (if (vectorp header) header
602 (setq header (make-mail-header "*****"))
603 (mail-header-set-number header 0)
604 (mail-header-set-lines header 0)
605 (mail-header-set-chars header 0)
607 (gnus-tmp-from (mail-header-from header))
608 (gnus-tmp-subject (mail-header-subject header))
609 (gnus-tmp-number (mail-header-number header))
612 ((string-match "(.+)" gnus-tmp-from)
613 (substring gnus-tmp-from
614 (1+ (match-beginning 0)) (1- (match-end 0))))
615 ((string-match "<[^>]+> *$" gnus-tmp-from)
616 (let ((beg (match-beginning 0)))
617 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
618 (substring gnus-tmp-from (1+ (match-beginning 0))
620 (substring gnus-tmp-from 0 beg))))
621 ((memq gnus-tmp-number sparse)
624 (gnus-tmp-open-bracket
625 (cond ((memq gnus-tmp-number sparse)
626 (caadr gnus-tree-brackets))
627 (dummy (caaddr gnus-tree-brackets))
628 (adopted (car (nth 3 gnus-tree-brackets)))
629 (t (caar gnus-tree-brackets))))
630 (gnus-tmp-close-bracket
631 (cond ((memq gnus-tmp-number sparse)
632 (cdadr gnus-tree-brackets))
633 (adopted (cdr (nth 3 gnus-tree-brackets)))
635 (cdaddr gnus-tree-brackets))
636 (t (cdar gnus-tree-brackets))))
637 (buffer-read-only nil)
639 (gnus-add-text-properties
641 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
642 (list 'gnus-number gnus-tmp-number))
643 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
644 (gnus-tree-highlight-node gnus-tmp-number beg end))))
646 (defun gnus-tree-highlight-node (article beg end)
647 "Highlight current line according to `gnus-summary-highlight'."
648 (let ((list gnus-summary-highlight)
651 (set-buffer gnus-summary-buffer)
652 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
653 gnus-summary-default-score 0))
654 (default gnus-summary-default-score)
655 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
656 ;; Eval the cars of the lists until we find a match.
658 (not (eval (caar list))))
659 (setq list (cdr list)))))
660 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
661 (gnus-put-text-property-excluding-characters-with-faces
663 (if (boundp face) (symbol-value face) face)))))
665 (defun gnus-tree-indent (level)
666 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
668 (defvar gnus-tmp-limit)
669 (defvar gnus-tmp-sparse)
670 (defvar gnus-tmp-indent)
672 (defun gnus-generate-tree (thread)
673 "Generate a thread tree for THREAD."
675 (set-buffer (gnus-get-tree-buffer))
676 (let ((buffer-read-only nil)
679 (funcall gnus-generate-tree-function thread 0)
680 (gnus-set-mode-line 'tree)
681 (goto-char (point-min))
684 (let ((selected (selected-window)))
685 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
686 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
687 (gnus-horizontal-recenter)
688 (select-window selected))))))
690 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
691 "Generate a horizontal tree."
692 (let* ((dummy (stringp (car thread)))
695 (memq (mail-header-number (car thread))
699 ;; We don't want this article.
700 (setq thread (cdr thread))
702 ;; Not the first article on the line, so we insert a "-".
703 (insert (car gnus-tree-parent-child-edges))
704 ;; If the level isn't zero, then we insert some indentation.
705 (unless (zerop level)
706 (gnus-tree-indent level)
707 (insert (cadr gnus-tree-parent-child-edges))
708 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
709 ;; Draw "|" lines upwards.
713 (eq (char-after) ? ))
715 (insert (caddr gnus-tree-parent-child-edges)))
718 ;; Insert the article node.
719 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
721 ;; End of the thread, so we go to the next line.
724 ;; Recurse downwards in all children of this article.
726 (gnus-generate-horizontal-tree
727 (pop thread) (if do (1+ level) level)
728 (or dummyp dummy) dummy)))))
730 (defsubst gnus-tree-indent-vertical ()
731 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
732 (- (point) (gnus-point-at-bol)))))
734 (insert (make-string len ? )))))
736 (defsubst gnus-tree-forward-line (n)
737 (while (>= (decf n) 0)
738 (unless (zerop (forward-line 1))
743 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
744 "Generate a vertical tree."
745 (let* ((dummy (stringp (car thread)))
748 (memq (mail-header-number (car thread))
752 ;; We don't want this article.
753 (setq thread (cdr thread))
754 (if (not (save-excursion (beginning-of-line) (bobp)))
755 ;; Not the first article on the line, so we insert a "-".
757 (gnus-tree-indent-vertical)
758 (insert (make-string (/ gnus-tree-node-length 2) ? ))
759 (insert (caddr gnus-tree-parent-child-edges))
760 (gnus-tree-forward-line 1))
761 ;; If the level isn't zero, then we insert some indentation.
762 (unless (zerop gnus-tmp-indent)
763 (gnus-tree-forward-line (1- (* 2 level)))
764 (gnus-tree-indent-vertical)
766 (insert (cadr gnus-tree-parent-child-edges))
769 ;; Draw "-" lines leftwards.
770 (while (and (> (point) 1)
771 (eq (char-after (1- (point))) ? ))
773 (insert (car gnus-tree-parent-child-edges))
776 (gnus-tree-forward-line 1)))
778 ;; Insert the article node.
779 (gnus-tree-indent-vertical)
780 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
781 (gnus-tree-forward-line 1))
783 ;; End of the thread, so we go to the next line.
785 (goto-char (point-min))
787 (incf gnus-tmp-indent))
788 ;; Recurse downwards in all children of this article.
790 (gnus-generate-vertical-tree
791 (pop thread) (if do (1+ level) level)
792 (or dummyp dummy) dummy)))))
794 ;;; Interface functions.
796 (defun gnus-possibly-generate-tree (article &optional force)
797 "Generate the thread tree for ARTICLE if it isn't displayed already."
798 (when (save-excursion
799 (set-buffer gnus-summary-buffer)
802 (vectorp (gnus-summary-article-header article))))
804 (let ((top (save-excursion
805 (set-buffer gnus-summary-buffer)
809 (gnus-summary-article-header article))
811 (gnus-tmp-limit gnus-newsgroup-limit)
812 (gnus-tmp-sparse gnus-newsgroup-sparse))
814 (not (eq top gnus-tree-displayed-thread)))
815 (gnus-generate-tree top)
816 (setq gnus-tree-displayed-thread top))))))
818 (defun gnus-tree-open (group)
819 (gnus-get-tree-buffer))
821 (defun gnus-tree-close (group)
822 (gnus-kill-buffer gnus-tree-buffer))
824 (defun gnus-highlight-selected-tree (article)
825 "Highlight the selected article in the tree."
826 (let ((buf (current-buffer))
828 (set-buffer gnus-tree-buffer)
829 (when (setq region (gnus-tree-article-region article))
830 (when (or (not gnus-selected-tree-overlay)
831 (gnus-extent-detached-p gnus-selected-tree-overlay))
832 ;; Create a new overlay.
834 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
835 'face gnus-selected-tree-face))
836 ;; Move the overlay to the article.
838 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
841 (let ((selected (selected-window)))
842 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
843 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
844 (gnus-horizontal-recenter)
845 (select-window selected))))
846 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
848 (set-buffer gnus-tree-buffer)
849 (gnus-set-mode-line 'tree))
852 (defun gnus-tree-highlight-article (article face)
854 (set-buffer (gnus-get-tree-buffer))
856 (when (setq region (gnus-tree-article-region article))
857 (gnus-put-text-property (car region) (cdr region) 'face face)
859 (get-buffer-window (current-buffer) t) (cdr region))))))
865 (defvar gnus-carpal-group-buffer-buttons
866 '(("next" . gnus-group-next-unread-group)
867 ("prev" . gnus-group-prev-unread-group)
868 ("read" . gnus-group-read-group)
869 ("select" . gnus-group-select-group)
870 ("catch-up" . gnus-group-catchup-current)
871 ("new-news" . gnus-group-get-new-news-this-group)
872 ("toggle-sub" . gnus-group-unsubscribe-current-group)
873 ("subscribe" . gnus-group-unsubscribe-group)
874 ("kill" . gnus-group-kill-group)
875 ("yank" . gnus-group-yank-group)
876 ("describe" . gnus-group-describe-group)
878 ("subscribed" . gnus-group-list-groups)
879 ("all" . gnus-group-list-all-groups)
880 ("killed" . gnus-group-list-killed)
881 ("zombies" . gnus-group-list-zombies)
882 ("matching" . gnus-group-list-matching)
883 ("post" . gnus-group-post-news)
884 ("mail" . gnus-group-mail)
885 ("rescan" . gnus-group-get-new-news)
886 ("browse-foreign" . gnus-group-browse-foreign)
887 ("exit" . gnus-group-exit)))
889 (defvar gnus-carpal-summary-buffer-buttons
891 ("read" . gnus-summary-mark-as-read-forward)
892 ("tick" . gnus-summary-tick-article-forward)
893 ("clear" . gnus-summary-clear-mark-forward)
894 ("expirable" . gnus-summary-mark-as-expirable)
896 ("scroll" . gnus-summary-next-page)
897 ("next-unread" . gnus-summary-next-unread-article)
898 ("prev-unread" . gnus-summary-prev-unread-article)
899 ("first" . gnus-summary-first-unread-article)
900 ("best" . gnus-summary-best-unread-article)
902 ("headers" . gnus-summary-toggle-header)
903 ("uudecode" . gnus-uu-decode-uu)
904 ("enter-digest" . gnus-summary-enter-digest-group)
905 ("fetch-parent" . gnus-summary-refer-parent-article)
907 ("move" . gnus-summary-move-article)
908 ("copy" . gnus-summary-copy-article)
909 ("respool" . gnus-summary-respool-article)
911 ("lower" . gnus-summary-lower-thread)
912 ("kill" . gnus-summary-kill-thread)
914 ("post" . gnus-summary-post-news)
915 ("mail" . gnus-summary-mail)
916 ("followup" . gnus-summary-followup-with-original)
917 ("reply" . gnus-summary-reply-with-original)
918 ("cancel" . gnus-summary-cancel-article)
920 ("exit" . gnus-summary-exit)
921 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
923 (defvar gnus-carpal-server-buffer-buttons
924 '(("add" . gnus-server-add-server)
925 ("browse" . gnus-server-browse-server)
926 ("list" . gnus-server-list-servers)
927 ("kill" . gnus-server-kill-server)
928 ("yank" . gnus-server-yank-server)
929 ("copy" . gnus-server-copy-server)
930 ("exit" . gnus-server-exit)))
932 (defvar gnus-carpal-browse-buffer-buttons
933 '(("subscribe" . gnus-browse-unsubscribe-current-group)
934 ("exit" . gnus-browse-exit)))
936 (defvar gnus-carpal-group-buffer "*Carpal Group*")
937 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
938 (defvar gnus-carpal-server-buffer "*Carpal Server*")
939 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
941 (defvar gnus-carpal-attached-buffer nil)
943 (defvar gnus-carpal-mode-hook nil
944 "*Hook run in carpal mode buffers.")
946 (defvar gnus-carpal-button-face 'bold
947 "*Face used on carpal buttons.")
949 (defvar gnus-carpal-header-face 'bold-italic
950 "*Face used on carpal buffer headers.")
952 (defvar gnus-carpal-mode-map nil)
953 (put 'gnus-carpal-mode 'mode-class 'special)
955 (if gnus-carpal-mode-map
957 (setq gnus-carpal-mode-map (make-keymap))
958 (suppress-keymap gnus-carpal-mode-map)
959 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
960 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
961 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
963 (defun gnus-carpal-mode ()
964 "Major mode for clicking buttons.
966 All normal editing commands are switched off.
967 \\<gnus-carpal-mode-map>
968 The following commands are available:
970 \\{gnus-carpal-mode-map}"
972 (kill-all-local-variables)
973 (setq mode-line-modified (cdr gnus-mode-line-modified))
974 (setq major-mode 'gnus-carpal-mode)
975 (setq mode-name "Gnus Carpal")
976 (setq mode-line-process nil)
977 (use-local-map gnus-carpal-mode-map)
978 (buffer-disable-undo)
979 (setq buffer-read-only t)
980 (make-local-variable 'gnus-carpal-attached-buffer)
981 (gnus-run-hooks 'gnus-carpal-mode-hook))
983 (defun gnus-carpal-setup-buffer (type)
984 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
985 (if (get-buffer buffer)
988 (set-buffer (gnus-get-buffer-create buffer))
990 (setq gnus-carpal-attached-buffer
991 (intern (format "gnus-%s-buffer" type)))
992 (let ((buttons (symbol-value
993 (intern (format "gnus-carpal-%s-buffer-buttons"
995 (buffer-read-only nil)
998 (setq button (car buttons)
999 buttons (cdr buttons))
1000 (if (stringp button)
1001 (gnus-set-text-properties
1003 (prog2 (insert button) (point) (insert " "))
1004 (list 'face gnus-carpal-header-face))
1005 (gnus-set-text-properties
1007 (prog2 (insert (car button)) (point) (insert " "))
1008 (list 'gnus-callback (cdr button)
1009 'face gnus-carpal-button-face
1010 gnus-mouse-face-prop 'highlight))))
1011 (let ((fill-column (- (window-width) 2)))
1012 (fill-region (point-min) (point-max)))
1013 (set-window-point (get-buffer-window (current-buffer))
1016 (defun gnus-carpal-select ()
1017 "Select the button under point."
1019 (let ((func (get-text-property (point) 'gnus-callback)))
1022 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1023 (call-interactively func))))
1025 (defun gnus-carpal-mouse-select (event)
1026 "Select the button under the mouse pointer."
1028 (mouse-set-point event)
1029 (gnus-carpal-select))
1031 ;;; Allow redefinition of functions.
1034 (provide 'gnus-salt)
1036 ;;; gnus-salt.el ends here