1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2 ;; Copyright (C) 1996,97 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
6 ;; This file is part of GNU Emacs.
8 ;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs; see the file COPYING. If not, write to the
20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 ;; Boston, MA 02111-1307, USA.
34 (defvar gnus-pick-mode nil
35 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
37 (defcustom gnus-pick-display-summary nil
38 "*Display summary while reading."
40 :group 'gnus-summary-pick)
42 (defcustom gnus-pick-mode-hook nil
43 "Hook run in summary pick mode buffers."
45 :group 'gnus-summary-pick)
47 (defcustom gnus-mark-unpicked-articles-as-read nil
48 "*If non-nil, mark all unpicked articles as read."
50 :group 'gnus-summary-pick)
52 (defcustom gnus-pick-elegant-flow t
53 "If non-nil, gnus-pick-start-reading will run gnus-summary-next-group when no articles have been picked."
55 :group 'gnus-summary-pick)
57 (defcustom gnus-summary-pick-line-format
58 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
59 "*The format specification of the lines in pick buffers.
60 It accepts the same format specs that `gnus-summary-line-format' does."
62 :group 'gnus-summary-pick)
64 ;;; Internal variables.
66 (defvar gnus-pick-mode-map nil)
68 (unless gnus-pick-mode-map
69 (setq gnus-pick-mode-map (make-sparse-keymap))
73 "t" gnus-uu-mark-thread
74 "T" gnus-uu-unmark-thread
75 " " gnus-pick-next-page
76 "u" gnus-summary-unmark-as-processable
77 "U" gnus-summary-unmark-all-processable
79 "r" gnus-uu-mark-region
80 "R" gnus-uu-unmark-region
81 "e" gnus-uu-mark-by-regexp
82 "E" gnus-uu-mark-by-regexp
83 "b" gnus-uu-mark-buffer
84 "B" gnus-uu-unmark-buffer
86 gnus-down-mouse-2 gnus-pick-mouse-pick-region
87 ;;gnus-mouse-2 gnus-pick-mouse-pick
88 "X" gnus-pick-start-reading
89 "\r" gnus-pick-start-reading))
91 (defun gnus-pick-make-menu-bar ()
92 (unless (boundp 'gnus-pick-menu)
94 gnus-pick-menu gnus-pick-mode-map ""
97 ["Article" gnus-summary-mark-as-processable t]
98 ["Thread" gnus-uu-mark-thread t]
99 ["Region" gnus-uu-mark-region t]
100 ["Regexp" gnus-uu-mark-regexp t]
101 ["Buffer" gnus-uu-mark-buffer t])
103 ["Article" gnus-summary-unmark-as-processable t]
104 ["Thread" gnus-uu-unmark-thread t]
105 ["Region" gnus-uu-unmark-region t]
106 ["Regexp" gnus-uu-unmark-regexp t]
107 ["Buffer" gnus-uu-unmark-buffer t])
108 ["Start reading" gnus-pick-start-reading t]
109 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
111 (defun gnus-pick-mode (&optional arg)
112 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
114 \\{gnus-pick-mode-map}"
116 (when (eq major-mode 'gnus-summary-mode)
117 (if (not (set (make-local-variable 'gnus-pick-mode)
118 (if (null arg) (not gnus-pick-mode)
119 (> (prefix-numeric-value arg) 0))))
120 (remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
121 ;; Make sure that we don't select any articles upon group entry.
122 (set (make-local-variable 'gnus-auto-select-first) nil)
123 ;; Change line format.
124 (setq gnus-summary-line-format gnus-summary-pick-line-format)
125 (setq gnus-summary-line-format-spec nil)
126 (gnus-update-format-specifications nil 'summary)
127 (gnus-update-summary-mark-positions)
128 (add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
129 (set (make-local-variable 'gnus-summary-goto-unread) 'never)
131 (when (gnus-visual-p 'pick-menu 'menu)
132 (gnus-pick-make-menu-bar))
133 (unless (assq 'gnus-pick-mode minor-mode-alist)
134 (push '(gnus-pick-mode " Pick") minor-mode-alist))
135 (unless (assq 'gnus-pick-mode minor-mode-map-alist)
136 (push (cons 'gnus-pick-mode gnus-pick-mode-map)
137 minor-mode-map-alist))
138 (run-hooks 'gnus-pick-mode-hook))))
140 (defun gnus-pick-setup-message ()
141 "Make Message do the right thing on exit."
142 (when (and (gnus-buffer-live-p gnus-summary-buffer)
144 (set-buffer gnus-summary-buffer)
147 '(gnus-configure-windows 'pick t) 'send 'exit 'postpone 'kill)))
149 (defvar gnus-pick-line-number 1)
150 (defun gnus-pick-line-number ()
151 "Return the current line number."
153 (setq gnus-pick-line-number 1)
154 (incf gnus-pick-line-number)))
156 (defun gnus-pick-start-reading (&optional catch-up)
157 "Start reading the picked articles.
158 If given a prefix, mark all unpicked articles as read."
160 (if gnus-newsgroup-processable
162 (gnus-summary-limit-to-articles nil)
163 (when (or catch-up gnus-mark-unpicked-articles-as-read)
164 (gnus-summary-limit-mark-excluded-as-read))
165 (gnus-summary-first-article)
166 (gnus-configure-windows
167 (if gnus-pick-display-summary 'article 'pick) t))
168 (if gnus-pick-elegant-flow
170 (when (or catch-up gnus-mark-unpicked-articles-as-read)
171 (gnus-summary-catchup nil t))
172 (if (gnus-group-quit-config gnus-newsgroup-name)
174 (gnus-summary-next-group)))
175 (error "No articles have been picked"))))
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."
184 (goto-char (point-min))
185 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
188 (gnus-error 2 "No such line: %s" arg)
190 (gnus-summary-mark-as-processable 1))
192 (defun gnus-pick-mouse-pick (e)
196 (gnus-summary-mark-as-processable 1)))
198 (defun gnus-pick-mouse-pick-region (start-event)
199 "Pick articles that the mouse is dragged over.
200 This must be bound to a button-down mouse event."
202 (mouse-minibuffer-check start-event)
203 (let* ((echo-keystrokes 0)
204 (start-posn (event-start start-event))
205 (start-point (posn-point start-posn))
206 (start-line (1+ (count-lines 1 start-point)))
207 (start-window (posn-window start-posn))
208 (start-frame (window-frame start-window))
209 (bounds (window-edges start-window))
211 (bottom (if (window-minibuffer-p start-window)
213 ;; Don't count the mode line.
214 (1- (nth 3 bounds))))
215 (click-count (1- (event-click-count start-event))))
216 (setq mouse-selection-click-count click-count)
217 (setq mouse-selection-click-count-buffer (current-buffer))
218 (mouse-set-point start-event)
219 ;; In case the down click is in the middle of some intangible text,
220 ;; use the end of that text, and put it in START-POINT.
221 (when (< (point) start-point)
222 (goto-char start-point))
224 (setq start-point (point))
225 ;; end-of-range is used only in the single-click case.
226 ;; It is the place where the drag has reached so far
227 ;; (but not outside the window where the drag started).
228 (let (event end end-point last-end-point (end-of-range (point)))
231 (setq event (read-event))
232 (or (mouse-movement-p event)
233 (eq (car-safe event) 'switch-frame)))
234 (if (eq (car-safe event) 'switch-frame)
236 (setq end (event-end event)
237 end-point (posn-point end))
239 (setq last-end-point end-point))
242 ;; Are we moving within the original window?
243 ((and (eq (posn-window end) start-window)
244 (integer-or-marker-p end-point))
245 ;; Go to START-POINT first, so that when we move to END-POINT,
246 ;; if it's in the middle of intangible text,
247 ;; point jumps in the direction away from START-POINT.
248 (goto-char start-point)
249 (goto-char end-point)
251 ;; In case the user moved his mouse really fast, pick
252 ;; articles on the line between this one and the last one.
253 (let* ((this-line (1+ (count-lines 1 end-point)))
254 (min-line (min this-line start-line))
255 (max-line (max this-line start-line)))
256 (while (< min-line max-line)
259 (setq min-line (1+ min-line)))
260 (setq start-line this-line))
261 (when (zerop (% click-count 3))
262 (setq end-of-range (point))))
264 (let ((mouse-row (cdr (cdr (mouse-position)))))
268 (mouse-scroll-subr start-window (- mouse-row top)))
269 ((>= mouse-row bottom)
270 (mouse-scroll-subr start-window
271 (1+ (- mouse-row bottom)))))))))))
273 (let ((fun (key-binding (vector (car event)))))
274 ;; Run the binding of the terminating up-event, if possible.
275 ;; In the case of a multiple click, it gives the wrong results,
276 ;; because it would fail to set up a region.
278 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
279 ;; In this case, we can just let the up-event execute normally.
280 (let ((end (event-end event)))
281 ;; Set the position in the event before we replay it,
282 ;; because otherwise it may have a position in the wrong
284 (setcar (cdr end) end-of-range)
285 ;; Delete the overlay before calling the function,
286 ;; because delete-overlay increases buffer-modified-tick.
287 (push event unread-command-events))))))))
289 (defun gnus-pick-next-page ()
290 "Go to the next page. If at the end of the buffer, start reading articles."
292 (let ((scroll-in-place nil))
295 (end-of-buffer (gnus-pick-start-reading)))))
301 (defvar gnus-binary-mode nil
302 "Minor mode for providing a binary group interface in Gnus summary buffers.")
304 (defvar gnus-binary-mode-hook nil
305 "Hook run in summary binary mode buffers.")
307 (defvar gnus-binary-mode-map nil)
309 (unless gnus-binary-mode-map
310 (setq gnus-binary-mode-map (make-sparse-keymap))
314 "g" gnus-binary-show-article))
316 (defun gnus-binary-make-menu-bar ()
317 (unless (boundp 'gnus-binary-menu)
319 gnus-binary-menu gnus-binary-mode-map ""
321 ["Switch binary mode off" gnus-binary-mode t]))))
323 (defun gnus-binary-mode (&optional arg)
324 "Minor mode for providing a binary group interface in Gnus summary buffers."
326 (when (eq major-mode 'gnus-summary-mode)
327 (make-local-variable 'gnus-binary-mode)
328 (setq gnus-binary-mode
329 (if (null arg) (not gnus-binary-mode)
330 (> (prefix-numeric-value arg) 0)))
331 (when gnus-binary-mode
332 ;; Make sure that we don't select any articles upon group entry.
333 (make-local-variable 'gnus-auto-select-first)
334 (setq gnus-auto-select-first nil)
335 (make-local-variable 'gnus-summary-display-article-function)
336 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
338 (when (gnus-visual-p 'binary-menu 'menu)
339 (gnus-binary-make-menu-bar))
340 (unless (assq 'gnus-binary-mode minor-mode-alist)
341 (push '(gnus-binary-mode " Binary") minor-mode-alist))
342 (unless (assq 'gnus-binary-mode minor-mode-map-alist)
343 (push (cons 'gnus-binary-mode gnus-binary-mode-map)
344 minor-mode-map-alist))
345 (run-hooks 'gnus-binary-mode-hook))))
347 (defun gnus-binary-display-article (article &optional all-header)
348 "Run ARTICLE through the binary decode functions."
349 (when (gnus-summary-goto-subject article)
350 (let ((gnus-view-pseudos 'automatic))
351 (gnus-uu-decode-uu))))
353 (defun gnus-binary-show-article (&optional arg)
354 "Bypass the binary functions and show the article."
356 (let (gnus-summary-display-article-function)
357 (gnus-summary-show-article arg)))
363 (defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
364 "Format of tree elements."
366 :group 'gnus-summary-tree)
368 (defcustom gnus-tree-minimize-window t
369 "If non-nil, minimize the tree buffer window.
370 If a number, never let the tree buffer grow taller than that number of
373 :group 'gnus-summary-tree)
375 (defcustom gnus-selected-tree-face 'modeline
376 "*Face used for highlighting selected articles in the thread tree."
378 :group 'gnus-summary-tree)
380 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
381 (?\{ . ?\}) (?< . ?>))
382 "Brackets used in tree nodes.")
384 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
385 "Characters used to connect parents with children.")
387 (defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
388 "*The format specification for the tree mode line."
390 :group 'gnus-summary-tree)
392 (defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
393 "*Function for generating a thread tree.
394 Two predefined functions are available:
395 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
396 :type '(radio (function-item gnus-generate-vertical-tree)
397 (function-item gnus-generate-horizontal-tree)
398 (function :tag "Other" nil))
399 :group 'gnus-summary-tree)
401 (defcustom gnus-tree-mode-hook nil
402 "*Hook run in tree mode buffers."
404 :group 'gnus-summary-tree)
406 ;;; Internal variables.
408 (defvar gnus-tree-line-format-alist
409 `((?n gnus-tmp-name ?s)
410 (?f gnus-tmp-from ?s)
411 (?N gnus-tmp-number ?d)
412 (?\[ gnus-tmp-open-bracket ?c)
413 (?\] gnus-tmp-close-bracket ?c)
414 (?s gnus-tmp-subject ?s)))
416 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
418 (defvar gnus-tree-mode-line-format-spec nil)
419 (defvar gnus-tree-line-format-spec nil)
421 (defvar gnus-tree-node-length nil)
422 (defvar gnus-selected-tree-overlay nil)
424 (defvar gnus-tree-displayed-thread nil)
426 (defvar gnus-tree-mode-map nil)
427 (put 'gnus-tree-mode 'mode-class 'special)
429 (unless gnus-tree-mode-map
430 (setq gnus-tree-mode-map (make-keymap))
431 (suppress-keymap gnus-tree-mode-map)
434 "\r" gnus-tree-select-article
435 gnus-mouse-2 gnus-tree-pick-article
436 "\C-?" gnus-tree-read-summary-keys
437 "h" gnus-tree-show-summary
439 "\C-c\C-i" gnus-info-find-node)
441 (substitute-key-definition
442 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
444 (defun gnus-tree-make-menu-bar ()
445 (unless (boundp 'gnus-tree-menu)
447 gnus-tree-menu gnus-tree-mode-map ""
449 ["Select article" gnus-tree-select-article t]))))
451 (defun gnus-tree-mode ()
452 "Major mode for displaying thread trees."
454 (setq gnus-tree-mode-line-format-spec
455 (gnus-parse-format gnus-tree-mode-line-format
456 gnus-summary-mode-line-format-alist))
457 (setq gnus-tree-line-format-spec
458 (gnus-parse-format gnus-tree-line-format
459 gnus-tree-line-format-alist t))
460 (when (gnus-visual-p 'tree-menu 'menu)
461 (gnus-tree-make-menu-bar))
462 (kill-all-local-variables)
463 (gnus-simplify-mode-line)
464 (setq mode-name "Tree")
465 (setq major-mode 'gnus-tree-mode)
466 (use-local-map gnus-tree-mode-map)
467 (buffer-disable-undo (current-buffer))
468 (setq buffer-read-only t)
469 (setq truncate-lines t)
471 (gnus-set-work-buffer)
472 (gnus-tree-node-insert (make-mail-header "") nil)
473 (setq gnus-tree-node-length (1- (point))))
474 (run-hooks 'gnus-tree-mode-hook))
476 (defun gnus-tree-read-summary-keys (&optional arg)
477 "Read a summary buffer key sequence and execute it."
479 (let ((buf (current-buffer))
481 (gnus-article-read-summary-keys arg nil t)
482 (when (setq win (get-buffer-window buf))
484 (when gnus-selected-tree-overlay
485 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
486 (gnus-tree-minimize))))
488 (defun gnus-tree-show-summary ()
489 "Reconfigure windows to show summary buffer."
491 (if (not (gnus-buffer-live-p gnus-summary-buffer))
492 (error "There is no summary buffer for this tree buffer")
493 (gnus-configure-windows 'article)
494 (gnus-summary-goto-subject gnus-current-article)))
496 (defun gnus-tree-select-article (article)
497 "Select the article under point, if any."
498 (interactive (list (gnus-tree-article-number)))
499 (let ((buf (current-buffer)))
502 (set-buffer gnus-summary-buffer)
503 (gnus-summary-goto-article article))
504 (select-window (get-buffer-window buf)))))
506 (defun gnus-tree-pick-article (e)
507 "Select the article under the mouse pointer."
510 (gnus-tree-select-article (gnus-tree-article-number)))
512 (defun gnus-tree-article-number ()
513 (get-text-property (point) 'gnus-number))
515 (defun gnus-tree-article-region (article)
516 "Return a cons with BEG and END of the article region."
517 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
519 (cons pos (next-single-property-change pos 'gnus-number)))))
521 (defun gnus-tree-goto-article (article)
522 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
526 (defun gnus-tree-recenter ()
527 "Center point in the tree window."
528 (let ((selected (selected-window))
529 (tree-window (get-buffer-window gnus-tree-buffer t)))
531 (select-window tree-window)
532 (when gnus-selected-tree-overlay
533 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
534 (let* ((top (cond ((< (window-height) 4) 0)
535 ((< (window-height) 7) 1)
537 (height (1- (window-height)))
538 (bottom (save-excursion (goto-char (point-max))
539 (forward-line (- height))
541 ;; Set the window start to either `bottom', which is the biggest
542 ;; possible valid number, or the second line from the top,
543 ;; whichever is the least.
545 tree-window (min bottom (save-excursion
546 (forward-line (- top)) (point)))))
547 (select-window selected))))
549 (defun gnus-get-tree-buffer ()
550 "Return the tree buffer properly initialized."
552 (set-buffer (get-buffer-create gnus-tree-buffer))
553 (unless (eq major-mode 'gnus-tree-mode)
554 (gnus-add-current-to-buffer-list)
558 (defun gnus-tree-minimize ()
559 (when (and gnus-tree-minimize-window
560 (not (one-window-p)))
563 (walk-windows (lambda (window) (incf windows)))
566 (* window-min-height (1- windows))
568 (let* ((window-min-height 2)
569 (height (count-lines (point-min) (point-max)))
570 (min (max (1- window-min-height) height))
571 (tot (if (numberp gnus-tree-minimize-window)
572 (min gnus-tree-minimize-window min)
574 (win (get-buffer-window (current-buffer)))
575 (wh (and win (1- (window-height win)))))
576 (setq tot (min tot tot-win-height))
579 (let ((selected (selected-window)))
580 (when (ignore-errors (select-window win))
581 (enlarge-window (- tot wh))
582 (select-window selected))))))))
584 ;;; Generating the tree.
586 (defun gnus-tree-node-insert (header sparse &optional adopted)
587 (let* ((dummy (stringp header))
588 (header (if (vectorp header) header
590 (setq header (make-mail-header "*****"))
591 (mail-header-set-number header 0)
592 (mail-header-set-lines header 0)
593 (mail-header-set-chars header 0)
595 (gnus-tmp-from (mail-header-from header))
596 (gnus-tmp-subject (mail-header-subject header))
597 (gnus-tmp-number (mail-header-number header))
600 ((string-match "(.+)" gnus-tmp-from)
601 (substring gnus-tmp-from
602 (1+ (match-beginning 0)) (1- (match-end 0))))
603 ((string-match "<[^>]+> *$" gnus-tmp-from)
604 (let ((beg (match-beginning 0)))
605 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
606 (substring gnus-tmp-from (1+ (match-beginning 0))
608 (substring gnus-tmp-from 0 beg))))
609 ((memq gnus-tmp-number sparse)
612 (gnus-tmp-open-bracket
613 (cond ((memq gnus-tmp-number sparse)
614 (caadr gnus-tree-brackets))
615 (dummy (caaddr gnus-tree-brackets))
616 (adopted (car (nth 3 gnus-tree-brackets)))
617 (t (caar gnus-tree-brackets))))
618 (gnus-tmp-close-bracket
619 (cond ((memq gnus-tmp-number sparse)
620 (cdadr gnus-tree-brackets))
621 (adopted (cdr (nth 3 gnus-tree-brackets)))
623 (cdaddr gnus-tree-brackets))
624 (t (cdar gnus-tree-brackets))))
625 (buffer-read-only nil)
627 (gnus-add-text-properties
629 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
630 (list 'gnus-number gnus-tmp-number))
631 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
632 (gnus-tree-highlight-node gnus-tmp-number beg end))))
634 (defun gnus-tree-highlight-node (article beg end)
635 "Highlight current line according to `gnus-summary-highlight'."
636 (let ((list gnus-summary-highlight)
639 (set-buffer gnus-summary-buffer)
640 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
641 gnus-summary-default-score 0))
642 (default gnus-summary-default-score)
643 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
644 ;; Eval the cars of the lists until we find a match.
646 (not (eval (caar list))))
647 (setq list (cdr list)))))
648 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
649 (gnus-put-text-property
651 (if (boundp face) (symbol-value face) face)))))
653 (defun gnus-tree-indent (level)
654 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
656 (defvar gnus-tmp-limit)
657 (defvar gnus-tmp-sparse)
658 (defvar gnus-tmp-indent)
660 (defun gnus-generate-tree (thread)
661 "Generate a thread tree for THREAD."
663 (set-buffer (gnus-get-tree-buffer))
664 (let ((buffer-read-only nil)
667 (funcall gnus-generate-tree-function thread 0)
668 (gnus-set-mode-line 'tree)
669 (goto-char (point-min))
672 (let ((selected (selected-window)))
673 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
674 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
675 (gnus-horizontal-recenter)
676 (select-window selected))))))
678 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
679 "Generate a horizontal tree."
680 (let* ((dummy (stringp (car thread)))
683 (memq (mail-header-number (car thread))
687 ;; We don't want this article.
688 (setq thread (cdr thread))
690 ;; Not the first article on the line, so we insert a "-".
691 (insert (car gnus-tree-parent-child-edges))
692 ;; If the level isn't zero, then we insert some indentation.
693 (unless (zerop level)
694 (gnus-tree-indent level)
695 (insert (cadr gnus-tree-parent-child-edges))
696 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
697 ;; Draw "|" lines upwards.
701 (= (following-char) ? ))
703 (insert (caddr gnus-tree-parent-child-edges)))
706 ;; Insert the article node.
707 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
709 ;; End of the thread, so we go to the next line.
712 ;; Recurse downwards in all children of this article.
714 (gnus-generate-horizontal-tree
715 (pop thread) (if do (1+ level) level)
716 (or dummyp dummy) dummy)))))
718 (defsubst gnus-tree-indent-vertical ()
719 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
720 (- (point) (gnus-point-at-bol)))))
722 (insert (make-string len ? )))))
724 (defsubst gnus-tree-forward-line (n)
725 (while (>= (decf n) 0)
726 (unless (zerop (forward-line 1))
731 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
732 "Generate a vertical tree."
733 (let* ((dummy (stringp (car thread)))
736 (memq (mail-header-number (car thread))
740 ;; We don't want this article.
741 (setq thread (cdr thread))
742 (if (not (save-excursion (beginning-of-line) (bobp)))
743 ;; Not the first article on the line, so we insert a "-".
745 (gnus-tree-indent-vertical)
746 (insert (make-string (/ gnus-tree-node-length 2) ? ))
747 (insert (caddr gnus-tree-parent-child-edges))
748 (gnus-tree-forward-line 1))
749 ;; If the level isn't zero, then we insert some indentation.
750 (unless (zerop gnus-tmp-indent)
751 (gnus-tree-forward-line (1- (* 2 level)))
752 (gnus-tree-indent-vertical)
754 (insert (cadr gnus-tree-parent-child-edges))
757 ;; Draw "-" lines leftwards.
758 (while (= (char-after (1- (point))) ? )
760 (insert (car gnus-tree-parent-child-edges))
763 (gnus-tree-forward-line 1)))
765 ;; Insert the article node.
766 (gnus-tree-indent-vertical)
767 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
768 (gnus-tree-forward-line 1))
770 ;; End of the thread, so we go to the next line.
772 (goto-char (point-min))
774 (incf gnus-tmp-indent))
775 ;; Recurse downwards in all children of this article.
777 (gnus-generate-vertical-tree
778 (pop thread) (if do (1+ level) level)
779 (or dummyp dummy) dummy)))))
781 ;;; Interface functions.
783 (defun gnus-possibly-generate-tree (article &optional force)
784 "Generate the thread tree for ARTICLE if it isn't displayed already."
785 (when (save-excursion
786 (set-buffer gnus-summary-buffer)
789 (vectorp (gnus-summary-article-header article))))
791 (let ((top (save-excursion
792 (set-buffer gnus-summary-buffer)
796 (gnus-summary-article-header article))
798 (gnus-tmp-limit gnus-newsgroup-limit)
799 (gnus-tmp-sparse gnus-newsgroup-sparse))
801 (not (eq top gnus-tree-displayed-thread)))
802 (gnus-generate-tree top)
803 (setq gnus-tree-displayed-thread top))))))
805 (defun gnus-tree-open (group)
806 (gnus-get-tree-buffer))
808 (defun gnus-tree-close (group)
809 ;(gnus-kill-buffer gnus-tree-buffer)
812 (defun gnus-highlight-selected-tree (article)
813 "Highlight the selected article in the tree."
814 (let ((buf (current-buffer))
816 (set-buffer gnus-tree-buffer)
817 (when (setq region (gnus-tree-article-region article))
818 (when (or (not gnus-selected-tree-overlay)
819 (gnus-extent-detached-p gnus-selected-tree-overlay))
820 ;; Create a new overlay.
822 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
823 'face gnus-selected-tree-face))
824 ;; Move the overlay to the article.
826 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
829 (let ((selected (selected-window)))
830 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
831 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
832 (gnus-horizontal-recenter)
833 (select-window selected))))
834 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
836 (set-buffer gnus-tree-buffer)
837 (gnus-set-mode-line 'tree))
840 (defun gnus-tree-highlight-article (article face)
842 (set-buffer (gnus-get-tree-buffer))
844 (when (setq region (gnus-tree-article-region article))
845 (gnus-put-text-property (car region) (cdr region) 'face face)
847 (get-buffer-window (current-buffer) t) (cdr region))))))
853 (defvar gnus-carpal-group-buffer-buttons
854 '(("next" . gnus-group-next-unread-group)
855 ("prev" . gnus-group-prev-unread-group)
856 ("read" . gnus-group-read-group)
857 ("select" . gnus-group-select-group)
858 ("catch-up" . gnus-group-catchup-current)
859 ("new-news" . gnus-group-get-new-news-this-group)
860 ("toggle-sub" . gnus-group-unsubscribe-current-group)
861 ("subscribe" . gnus-group-unsubscribe-group)
862 ("kill" . gnus-group-kill-group)
863 ("yank" . gnus-group-yank-group)
864 ("describe" . gnus-group-describe-group)
866 ("subscribed" . gnus-group-list-groups)
867 ("all" . gnus-group-list-all-groups)
868 ("killed" . gnus-group-list-killed)
869 ("zombies" . gnus-group-list-zombies)
870 ("matching" . gnus-group-list-matching)
871 ("post" . gnus-group-post-news)
872 ("mail" . gnus-group-mail)
873 ("rescan" . gnus-group-get-new-news)
874 ("browse-foreign" . gnus-group-browse-foreign)
875 ("exit" . gnus-group-exit)))
877 (defvar gnus-carpal-summary-buffer-buttons
879 ("read" . gnus-summary-mark-as-read-forward)
880 ("tick" . gnus-summary-tick-article-forward)
881 ("clear" . gnus-summary-clear-mark-forward)
882 ("expirable" . gnus-summary-mark-as-expirable)
884 ("scroll" . gnus-summary-next-page)
885 ("next-unread" . gnus-summary-next-unread-article)
886 ("prev-unread" . gnus-summary-prev-unread-article)
887 ("first" . gnus-summary-first-unread-article)
888 ("best" . gnus-summary-best-unread-article)
890 ("headers" . gnus-summary-toggle-header)
891 ("uudecode" . gnus-uu-decode-uu)
892 ("enter-digest" . gnus-summary-enter-digest-group)
893 ("fetch-parent" . gnus-summary-refer-parent-article)
895 ("move" . gnus-summary-move-article)
896 ("copy" . gnus-summary-copy-article)
897 ("respool" . gnus-summary-respool-article)
899 ("lower" . gnus-summary-lower-thread)
900 ("kill" . gnus-summary-kill-thread)
902 ("post" . gnus-summary-post-news)
903 ("mail" . gnus-summary-mail)
904 ("followup" . gnus-summary-followup-with-original)
905 ("reply" . gnus-summary-reply-with-original)
906 ("cancel" . gnus-summary-cancel-article)
908 ("exit" . gnus-summary-exit)
909 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
911 (defvar gnus-carpal-server-buffer-buttons
912 '(("add" . gnus-server-add-server)
913 ("browse" . gnus-server-browse-server)
914 ("list" . gnus-server-list-servers)
915 ("kill" . gnus-server-kill-server)
916 ("yank" . gnus-server-yank-server)
917 ("copy" . gnus-server-copy-server)
918 ("exit" . gnus-server-exit)))
920 (defvar gnus-carpal-browse-buffer-buttons
921 '(("subscribe" . gnus-browse-unsubscribe-current-group)
922 ("exit" . gnus-browse-exit)))
924 (defvar gnus-carpal-group-buffer "*Carpal Group*")
925 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
926 (defvar gnus-carpal-server-buffer "*Carpal Server*")
927 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
929 (defvar gnus-carpal-attached-buffer nil)
931 (defvar gnus-carpal-mode-hook nil
932 "*Hook run in carpal mode buffers.")
934 (defvar gnus-carpal-button-face 'bold
935 "*Face used on carpal buttons.")
937 (defvar gnus-carpal-header-face 'bold-italic
938 "*Face used on carpal buffer headers.")
940 (defvar gnus-carpal-mode-map nil)
941 (put 'gnus-carpal-mode 'mode-class 'special)
943 (if gnus-carpal-mode-map
945 (setq gnus-carpal-mode-map (make-keymap))
946 (suppress-keymap gnus-carpal-mode-map)
947 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
948 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
949 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
951 (defun gnus-carpal-mode ()
952 "Major mode for clicking buttons.
954 All normal editing commands are switched off.
955 \\<gnus-carpal-mode-map>
956 The following commands are available:
958 \\{gnus-carpal-mode-map}"
960 (kill-all-local-variables)
961 (setq mode-line-modified "-- ")
962 (setq major-mode 'gnus-carpal-mode)
963 (setq mode-name "Gnus Carpal")
964 (setq mode-line-process nil)
965 (use-local-map gnus-carpal-mode-map)
966 (buffer-disable-undo (current-buffer))
967 (setq buffer-read-only t)
968 (make-local-variable 'gnus-carpal-attached-buffer)
969 (run-hooks 'gnus-carpal-mode-hook))
971 (defun gnus-carpal-setup-buffer (type)
972 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
973 (if (get-buffer buffer)
976 (set-buffer (get-buffer-create buffer))
978 (setq gnus-carpal-attached-buffer
979 (intern (format "gnus-%s-buffer" type)))
980 (gnus-add-current-to-buffer-list)
981 (let ((buttons (symbol-value
982 (intern (format "gnus-carpal-%s-buffer-buttons"
984 (buffer-read-only nil)
987 (setq button (car buttons)
988 buttons (cdr buttons))
990 (gnus-set-text-properties
992 (prog2 (insert button) (point) (insert " "))
993 (list 'face gnus-carpal-header-face))
994 (gnus-set-text-properties
996 (prog2 (insert (car button)) (point) (insert " "))
997 (list 'gnus-callback (cdr button)
998 'face gnus-carpal-button-face
999 gnus-mouse-face-prop 'highlight))))
1000 (let ((fill-column (- (window-width) 2)))
1001 (fill-region (point-min) (point-max)))
1002 (set-window-point (get-buffer-window (current-buffer))
1005 (defun gnus-carpal-select ()
1006 "Select the button under point."
1008 (let ((func (get-text-property (point) 'gnus-callback)))
1011 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1012 (call-interactively func))))
1014 (defun gnus-carpal-mouse-select (event)
1015 "Select the button under the mouse pointer."
1017 (mouse-set-point event)
1018 (gnus-carpal-select))
1020 ;;; Allow redefinition of functions.
1023 (provide 'gnus-salt)
1025 ;;; gnus-salt.el ends here