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[bpt/emacs.git] / lisp / gnus / gnus-salt.el
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1;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
2;; Copyright (C) 1996,97 Free Software Foundation, Inc.
3
4;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
5
6;; This file is part of GNU Emacs.
7
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)
11;; any later version.
12
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.
17
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.
22
23;;; Commentary:
24
25;;; Code:
26
5ab7173c
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27(eval-when-compile (require 'cl))
28
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29(require 'gnus)
30(require 'gnus-sum)
31
32;;;
33;;; gnus-pick-mode
34;;;
35
36(defvar gnus-pick-mode nil
37 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
38
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39(defcustom gnus-pick-display-summary nil
40 "*Display summary while reading."
41 :type 'boolean
42 :group 'gnus-summary-pick)
43
44(defcustom gnus-pick-mode-hook nil
45 "Hook run in summary pick mode buffers."
46 :type 'hook
47 :group 'gnus-summary-pick)
48
49(defcustom gnus-mark-unpicked-articles-as-read nil
50 "*If non-nil, mark all unpicked articles as read."
51 :type 'boolean
52 :group 'gnus-summary-pick)
53
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."
56 :type 'boolean
57 :group 'gnus-summary-pick)
58
59(defcustom gnus-summary-pick-line-format
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60 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
61 "*The format specification of the lines in pick buffers.
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62It accepts the same format specs that `gnus-summary-line-format' does."
63 :type 'string
64 :group 'gnus-summary-pick)
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65
66;;; Internal variables.
67
68(defvar gnus-pick-mode-map nil)
69
70(unless gnus-pick-mode-map
71 (setq gnus-pick-mode-map (make-sparse-keymap))
72
73 (gnus-define-keys
74 gnus-pick-mode-map
75 "t" gnus-uu-mark-thread
76 "T" gnus-uu-unmark-thread
77 " " gnus-pick-next-page
78 "u" gnus-summary-unmark-as-processable
79 "U" gnus-summary-unmark-all-processable
80 "v" gnus-uu-mark-over
81 "r" gnus-uu-mark-region
82 "R" gnus-uu-unmark-region
83 "e" gnus-uu-mark-by-regexp
84 "E" gnus-uu-mark-by-regexp
85 "b" gnus-uu-mark-buffer
86 "B" gnus-uu-unmark-buffer
87 "." gnus-pick-article
88 gnus-down-mouse-2 gnus-pick-mouse-pick-region
89 ;;gnus-mouse-2 gnus-pick-mouse-pick
90 "X" gnus-pick-start-reading
91 "\r" gnus-pick-start-reading))
92
93(defun gnus-pick-make-menu-bar ()
94 (unless (boundp 'gnus-pick-menu)
95 (easy-menu-define
96 gnus-pick-menu gnus-pick-mode-map ""
97 '("Pick"
98 ("Pick"
99 ["Article" gnus-summary-mark-as-processable t]
100 ["Thread" gnus-uu-mark-thread t]
101 ["Region" gnus-uu-mark-region t]
102 ["Regexp" gnus-uu-mark-regexp t]
103 ["Buffer" gnus-uu-mark-buffer t])
104 ("Unpick"
105 ["Article" gnus-summary-unmark-as-processable t]
106 ["Thread" gnus-uu-unmark-thread t]
107 ["Region" gnus-uu-unmark-region t]
108 ["Regexp" gnus-uu-unmark-regexp t]
109 ["Buffer" gnus-uu-unmark-buffer t])
110 ["Start reading" gnus-pick-start-reading t]
111 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
112
113(defun gnus-pick-mode (&optional arg)
114 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
115
116\\{gnus-pick-mode-map}"
117 (interactive "P")
118 (when (eq major-mode 'gnus-summary-mode)
119 (if (not (set (make-local-variable 'gnus-pick-mode)
120 (if (null arg) (not gnus-pick-mode)
121 (> (prefix-numeric-value arg) 0))))
122 (remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
123 ;; Make sure that we don't select any articles upon group entry.
124 (set (make-local-variable 'gnus-auto-select-first) nil)
125 ;; Change line format.
126 (setq gnus-summary-line-format gnus-summary-pick-line-format)
127 (setq gnus-summary-line-format-spec nil)
128 (gnus-update-format-specifications nil 'summary)
129 (gnus-update-summary-mark-positions)
130 (add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
131 (set (make-local-variable 'gnus-summary-goto-unread) 'never)
132 ;; Set up the menu.
133 (when (gnus-visual-p 'pick-menu 'menu)
134 (gnus-pick-make-menu-bar))
a8151ef7 135 (gnus-add-minor-mode 'gnus-pick-mode " Pick" gnus-pick-mode-map)
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136 (run-hooks 'gnus-pick-mode-hook))))
137
138(defun gnus-pick-setup-message ()
139 "Make Message do the right thing on exit."
140 (when (and (gnus-buffer-live-p gnus-summary-buffer)
141 (save-excursion
142 (set-buffer gnus-summary-buffer)
143 gnus-pick-mode))
144 (message-add-action
145 '(gnus-configure-windows 'pick t) 'send 'exit 'postpone 'kill)))
146
147(defvar gnus-pick-line-number 1)
148(defun gnus-pick-line-number ()
149 "Return the current line number."
150 (if (bobp)
151 (setq gnus-pick-line-number 1)
152 (incf gnus-pick-line-number)))
153
154(defun gnus-pick-start-reading (&optional catch-up)
155 "Start reading the picked articles.
156If given a prefix, mark all unpicked articles as read."
157 (interactive "P")
158 (if gnus-newsgroup-processable
159 (progn
160 (gnus-summary-limit-to-articles nil)
161 (when (or catch-up gnus-mark-unpicked-articles-as-read)
162 (gnus-summary-limit-mark-excluded-as-read))
163 (gnus-summary-first-article)
164 (gnus-configure-windows
165 (if gnus-pick-display-summary 'article 'pick) t))
166 (if gnus-pick-elegant-flow
167 (progn
168 (when (or catch-up gnus-mark-unpicked-articles-as-read)
a8151ef7 169 (gnus-summary-catchup nil t))
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170 (if (gnus-group-quit-config gnus-newsgroup-name)
171 (gnus-summary-exit)
172 (gnus-summary-next-group)))
173 (error "No articles have been picked"))))
174
175(defun gnus-pick-article (&optional arg)
176 "Pick the article on the current line.
177If ARG, pick the article on that line instead."
178 (interactive "P")
179 (when arg
180 (let (pos)
181 (save-excursion
182 (goto-char (point-min))
183 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
184 (setq pos (point))))
185 (if (not pos)
186 (gnus-error 2 "No such line: %s" arg)
187 (goto-char pos))))
188 (gnus-summary-mark-as-processable 1))
189
190(defun gnus-pick-mouse-pick (e)
191 (interactive "e")
192 (mouse-set-point e)
193 (save-excursion
194 (gnus-summary-mark-as-processable 1)))
195
196(defun gnus-pick-mouse-pick-region (start-event)
197 "Pick articles that the mouse is dragged over.
198This must be bound to a button-down mouse event."
199 (interactive "e")
200 (mouse-minibuffer-check start-event)
201 (let* ((echo-keystrokes 0)
202 (start-posn (event-start start-event))
203 (start-point (posn-point start-posn))
204 (start-line (1+ (count-lines 1 start-point)))
205 (start-window (posn-window start-posn))
206 (start-frame (window-frame start-window))
207 (bounds (window-edges start-window))
208 (top (nth 1 bounds))
209 (bottom (if (window-minibuffer-p start-window)
210 (nth 3 bounds)
211 ;; Don't count the mode line.
212 (1- (nth 3 bounds))))
213 (click-count (1- (event-click-count start-event))))
214 (setq mouse-selection-click-count click-count)
215 (setq mouse-selection-click-count-buffer (current-buffer))
216 (mouse-set-point start-event)
217 ;; In case the down click is in the middle of some intangible text,
218 ;; use the end of that text, and put it in START-POINT.
219 (when (< (point) start-point)
220 (goto-char start-point))
221 (gnus-pick-article)
222 (setq start-point (point))
223 ;; end-of-range is used only in the single-click case.
224 ;; It is the place where the drag has reached so far
225 ;; (but not outside the window where the drag started).
226 (let (event end end-point last-end-point (end-of-range (point)))
227 (track-mouse
228 (while (progn
229 (setq event (read-event))
230 (or (mouse-movement-p event)
231 (eq (car-safe event) 'switch-frame)))
232 (if (eq (car-safe event) 'switch-frame)
233 nil
234 (setq end (event-end event)
235 end-point (posn-point end))
236 (when end-point
237 (setq last-end-point end-point))
238
239 (cond
240 ;; Are we moving within the original window?
241 ((and (eq (posn-window end) start-window)
242 (integer-or-marker-p end-point))
243 ;; Go to START-POINT first, so that when we move to END-POINT,
244 ;; if it's in the middle of intangible text,
245 ;; point jumps in the direction away from START-POINT.
246 (goto-char start-point)
247 (goto-char end-point)
248 (gnus-pick-article)
249 ;; In case the user moved his mouse really fast, pick
250 ;; articles on the line between this one and the last one.
251 (let* ((this-line (1+ (count-lines 1 end-point)))
252 (min-line (min this-line start-line))
253 (max-line (max this-line start-line)))
254 (while (< min-line max-line)
255 (goto-line min-line)
256 (gnus-pick-article)
257 (setq min-line (1+ min-line)))
258 (setq start-line this-line))
259 (when (zerop (% click-count 3))
260 (setq end-of-range (point))))
261 (t
262 (let ((mouse-row (cdr (cdr (mouse-position)))))
263 (cond
264 ((null mouse-row))
265 ((< mouse-row top)
266 (mouse-scroll-subr start-window (- mouse-row top)))
267 ((>= mouse-row bottom)
268 (mouse-scroll-subr start-window
269 (1+ (- mouse-row bottom)))))))))))
270 (when (consp event)
271 (let ((fun (key-binding (vector (car event)))))
272 ;; Run the binding of the terminating up-event, if possible.
273 ;; In the case of a multiple click, it gives the wrong results,
274 ;; because it would fail to set up a region.
275 (when nil
276 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
277 ;; In this case, we can just let the up-event execute normally.
278 (let ((end (event-end event)))
279 ;; Set the position in the event before we replay it,
280 ;; because otherwise it may have a position in the wrong
281 ;; buffer.
282 (setcar (cdr end) end-of-range)
283 ;; Delete the overlay before calling the function,
284 ;; because delete-overlay increases buffer-modified-tick.
285 (push event unread-command-events))))))))
286
287(defun gnus-pick-next-page ()
288 "Go to the next page. If at the end of the buffer, start reading articles."
289 (interactive)
290 (let ((scroll-in-place nil))
291 (condition-case nil
292 (scroll-up)
293 (end-of-buffer (gnus-pick-start-reading)))))
294
295;;;
296;;; gnus-binary-mode
297;;;
298
299(defvar gnus-binary-mode nil
300 "Minor mode for providing a binary group interface in Gnus summary buffers.")
301
302(defvar gnus-binary-mode-hook nil
303 "Hook run in summary binary mode buffers.")
304
305(defvar gnus-binary-mode-map nil)
306
307(unless gnus-binary-mode-map
308 (setq gnus-binary-mode-map (make-sparse-keymap))
309
310 (gnus-define-keys
311 gnus-binary-mode-map
312 "g" gnus-binary-show-article))
313
314(defun gnus-binary-make-menu-bar ()
315 (unless (boundp 'gnus-binary-menu)
316 (easy-menu-define
317 gnus-binary-menu gnus-binary-mode-map ""
318 '("Pick"
319 ["Switch binary mode off" gnus-binary-mode t]))))
320
321(defun gnus-binary-mode (&optional arg)
322 "Minor mode for providing a binary group interface in Gnus summary buffers."
323 (interactive "P")
324 (when (eq major-mode 'gnus-summary-mode)
325 (make-local-variable 'gnus-binary-mode)
326 (setq gnus-binary-mode
327 (if (null arg) (not gnus-binary-mode)
328 (> (prefix-numeric-value arg) 0)))
329 (when gnus-binary-mode
330 ;; Make sure that we don't select any articles upon group entry.
331 (make-local-variable 'gnus-auto-select-first)
332 (setq gnus-auto-select-first nil)
333 (make-local-variable 'gnus-summary-display-article-function)
334 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
335 ;; Set up the menu.
336 (when (gnus-visual-p 'binary-menu 'menu)
337 (gnus-binary-make-menu-bar))
a8151ef7 338 (gnus-add-minor-mode 'gnus-binary-mode " Binary" gnus-binary-mode-map)
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339 (run-hooks 'gnus-binary-mode-hook))))
340
341(defun gnus-binary-display-article (article &optional all-header)
342 "Run ARTICLE through the binary decode functions."
343 (when (gnus-summary-goto-subject article)
344 (let ((gnus-view-pseudos 'automatic))
345 (gnus-uu-decode-uu))))
346
347(defun gnus-binary-show-article (&optional arg)
348 "Bypass the binary functions and show the article."
349 (interactive "P")
350 (let (gnus-summary-display-article-function)
351 (gnus-summary-show-article arg)))
352
353;;;
354;;; gnus-tree-mode
355;;;
356
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357(defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
358 "Format of tree elements."
359 :type 'string
360 :group 'gnus-summary-tree)
eec82323 361
a8151ef7 362(defcustom gnus-tree-minimize-window t
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363 "If non-nil, minimize the tree buffer window.
364If a number, never let the tree buffer grow taller than that number of
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365lines."
366 :type 'boolean
367 :group 'gnus-summary-tree)
eec82323 368
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369(defcustom gnus-selected-tree-face 'modeline
370 "*Face used for highlighting selected articles in the thread tree."
371 :type 'face
372 :group 'gnus-summary-tree)
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373
374(defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
375 (?\{ . ?\}) (?< . ?>))
376 "Brackets used in tree nodes.")
377
378(defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
379 "Characters used to connect parents with children.")
380
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381(defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
382 "*The format specification for the tree mode line."
383 :type 'string
384 :group 'gnus-summary-tree)
eec82323 385
a8151ef7 386(defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
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387 "*Function for generating a thread tree.
388Two predefined functions are available:
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389`gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
390 :type '(radio (function-item gnus-generate-vertical-tree)
391 (function-item gnus-generate-horizontal-tree)
392 (function :tag "Other" nil))
393 :group 'gnus-summary-tree)
eec82323 394
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395(defcustom gnus-tree-mode-hook nil
396 "*Hook run in tree mode buffers."
397 :type 'hook
398 :group 'gnus-summary-tree)
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399
400;;; Internal variables.
401
402(defvar gnus-tree-line-format-alist
403 `((?n gnus-tmp-name ?s)
404 (?f gnus-tmp-from ?s)
405 (?N gnus-tmp-number ?d)
406 (?\[ gnus-tmp-open-bracket ?c)
407 (?\] gnus-tmp-close-bracket ?c)
408 (?s gnus-tmp-subject ?s)))
409
410(defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
411
412(defvar gnus-tree-mode-line-format-spec nil)
413(defvar gnus-tree-line-format-spec nil)
414
415(defvar gnus-tree-node-length nil)
416(defvar gnus-selected-tree-overlay nil)
417
418(defvar gnus-tree-displayed-thread nil)
419
420(defvar gnus-tree-mode-map nil)
421(put 'gnus-tree-mode 'mode-class 'special)
422
423(unless gnus-tree-mode-map
424 (setq gnus-tree-mode-map (make-keymap))
425 (suppress-keymap gnus-tree-mode-map)
426 (gnus-define-keys
427 gnus-tree-mode-map
428 "\r" gnus-tree-select-article
429 gnus-mouse-2 gnus-tree-pick-article
430 "\C-?" gnus-tree-read-summary-keys
a8151ef7 431 "h" gnus-tree-show-summary
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432
433 "\C-c\C-i" gnus-info-find-node)
434
435 (substitute-key-definition
436 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
437
438(defun gnus-tree-make-menu-bar ()
439 (unless (boundp 'gnus-tree-menu)
440 (easy-menu-define
441 gnus-tree-menu gnus-tree-mode-map ""
442 '("Tree"
443 ["Select article" gnus-tree-select-article t]))))
444
445(defun gnus-tree-mode ()
446 "Major mode for displaying thread trees."
447 (interactive)
448 (setq gnus-tree-mode-line-format-spec
449 (gnus-parse-format gnus-tree-mode-line-format
450 gnus-summary-mode-line-format-alist))
451 (setq gnus-tree-line-format-spec
452 (gnus-parse-format gnus-tree-line-format
453 gnus-tree-line-format-alist t))
454 (when (gnus-visual-p 'tree-menu 'menu)
455 (gnus-tree-make-menu-bar))
456 (kill-all-local-variables)
457 (gnus-simplify-mode-line)
458 (setq mode-name "Tree")
459 (setq major-mode 'gnus-tree-mode)
460 (use-local-map gnus-tree-mode-map)
461 (buffer-disable-undo (current-buffer))
462 (setq buffer-read-only t)
463 (setq truncate-lines t)
464 (save-excursion
465 (gnus-set-work-buffer)
466 (gnus-tree-node-insert (make-mail-header "") nil)
467 (setq gnus-tree-node-length (1- (point))))
468 (run-hooks 'gnus-tree-mode-hook))
469
470(defun gnus-tree-read-summary-keys (&optional arg)
471 "Read a summary buffer key sequence and execute it."
472 (interactive "P")
473 (let ((buf (current-buffer))
474 win)
475 (gnus-article-read-summary-keys arg nil t)
476 (when (setq win (get-buffer-window buf))
477 (select-window win)
478 (when gnus-selected-tree-overlay
479 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
480 (gnus-tree-minimize))))
481
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482(defun gnus-tree-show-summary ()
483 "Reconfigure windows to show summary buffer."
484 (interactive)
485 (if (not (gnus-buffer-live-p gnus-summary-buffer))
486 (error "There is no summary buffer for this tree buffer")
487 (gnus-configure-windows 'article)
488 (gnus-summary-goto-subject gnus-current-article)))
489
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490(defun gnus-tree-select-article (article)
491 "Select the article under point, if any."
492 (interactive (list (gnus-tree-article-number)))
493 (let ((buf (current-buffer)))
494 (when article
495 (save-excursion
496 (set-buffer gnus-summary-buffer)
497 (gnus-summary-goto-article article))
498 (select-window (get-buffer-window buf)))))
499
500(defun gnus-tree-pick-article (e)
501 "Select the article under the mouse pointer."
502 (interactive "e")
503 (mouse-set-point e)
504 (gnus-tree-select-article (gnus-tree-article-number)))
505
506(defun gnus-tree-article-number ()
507 (get-text-property (point) 'gnus-number))
508
509(defun gnus-tree-article-region (article)
510 "Return a cons with BEG and END of the article region."
511 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
512 (when pos
513 (cons pos (next-single-property-change pos 'gnus-number)))))
514
515(defun gnus-tree-goto-article (article)
516 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
517 (when pos
518 (goto-char pos))))
519
520(defun gnus-tree-recenter ()
521 "Center point in the tree window."
522 (let ((selected (selected-window))
523 (tree-window (get-buffer-window gnus-tree-buffer t)))
524 (when tree-window
525 (select-window tree-window)
526 (when gnus-selected-tree-overlay
527 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
528 (let* ((top (cond ((< (window-height) 4) 0)
529 ((< (window-height) 7) 1)
530 (t 2)))
531 (height (1- (window-height)))
532 (bottom (save-excursion (goto-char (point-max))
533 (forward-line (- height))
534 (point))))
535 ;; Set the window start to either `bottom', which is the biggest
536 ;; possible valid number, or the second line from the top,
537 ;; whichever is the least.
538 (set-window-start
539 tree-window (min bottom (save-excursion
540 (forward-line (- top)) (point)))))
541 (select-window selected))))
542
543(defun gnus-get-tree-buffer ()
544 "Return the tree buffer properly initialized."
545 (save-excursion
546 (set-buffer (get-buffer-create gnus-tree-buffer))
547 (unless (eq major-mode 'gnus-tree-mode)
548 (gnus-add-current-to-buffer-list)
549 (gnus-tree-mode))
550 (current-buffer)))
551
552(defun gnus-tree-minimize ()
553 (when (and gnus-tree-minimize-window
554 (not (one-window-p)))
555 (let ((windows 0)
556 tot-win-height)
557 (walk-windows (lambda (window) (incf windows)))
558 (setq tot-win-height
559 (- (frame-height)
560 (* window-min-height (1- windows))
561 2))
562 (let* ((window-min-height 2)
563 (height (count-lines (point-min) (point-max)))
564 (min (max (1- window-min-height) height))
565 (tot (if (numberp gnus-tree-minimize-window)
566 (min gnus-tree-minimize-window min)
567 min))
568 (win (get-buffer-window (current-buffer)))
569 (wh (and win (1- (window-height win)))))
570 (setq tot (min tot tot-win-height))
571 (when (and win
572 (not (eq tot wh)))
573 (let ((selected (selected-window)))
574 (when (ignore-errors (select-window win))
575 (enlarge-window (- tot wh))
576 (select-window selected))))))))
577
578;;; Generating the tree.
579
580(defun gnus-tree-node-insert (header sparse &optional adopted)
581 (let* ((dummy (stringp header))
582 (header (if (vectorp header) header
583 (progn
584 (setq header (make-mail-header "*****"))
585 (mail-header-set-number header 0)
586 (mail-header-set-lines header 0)
587 (mail-header-set-chars header 0)
588 header)))
589 (gnus-tmp-from (mail-header-from header))
590 (gnus-tmp-subject (mail-header-subject header))
591 (gnus-tmp-number (mail-header-number header))
592 (gnus-tmp-name
593 (cond
594 ((string-match "(.+)" gnus-tmp-from)
595 (substring gnus-tmp-from
596 (1+ (match-beginning 0)) (1- (match-end 0))))
597 ((string-match "<[^>]+> *$" gnus-tmp-from)
598 (let ((beg (match-beginning 0)))
599 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
600 (substring gnus-tmp-from (1+ (match-beginning 0))
601 (1- (match-end 0))))
602 (substring gnus-tmp-from 0 beg))))
603 ((memq gnus-tmp-number sparse)
604 "***")
605 (t gnus-tmp-from)))
606 (gnus-tmp-open-bracket
607 (cond ((memq gnus-tmp-number sparse)
608 (caadr gnus-tree-brackets))
609 (dummy (caaddr gnus-tree-brackets))
610 (adopted (car (nth 3 gnus-tree-brackets)))
611 (t (caar gnus-tree-brackets))))
612 (gnus-tmp-close-bracket
613 (cond ((memq gnus-tmp-number sparse)
614 (cdadr gnus-tree-brackets))
615 (adopted (cdr (nth 3 gnus-tree-brackets)))
616 (dummy
617 (cdaddr gnus-tree-brackets))
618 (t (cdar gnus-tree-brackets))))
619 (buffer-read-only nil)
620 beg end)
621 (gnus-add-text-properties
622 (setq beg (point))
623 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
624 (list 'gnus-number gnus-tmp-number))
625 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
626 (gnus-tree-highlight-node gnus-tmp-number beg end))))
627
628(defun gnus-tree-highlight-node (article beg end)
629 "Highlight current line according to `gnus-summary-highlight'."
630 (let ((list gnus-summary-highlight)
631 face)
632 (save-excursion
633 (set-buffer gnus-summary-buffer)
634 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
635 gnus-summary-default-score 0))
636 (default gnus-summary-default-score)
637 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
638 ;; Eval the cars of the lists until we find a match.
639 (while (and list
640 (not (eval (caar list))))
641 (setq list (cdr list)))))
642 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
643 (gnus-put-text-property
644 beg end 'face
645 (if (boundp face) (symbol-value face) face)))))
646
647(defun gnus-tree-indent (level)
648 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
649
650(defvar gnus-tmp-limit)
651(defvar gnus-tmp-sparse)
652(defvar gnus-tmp-indent)
653
654(defun gnus-generate-tree (thread)
655 "Generate a thread tree for THREAD."
656 (save-excursion
657 (set-buffer (gnus-get-tree-buffer))
658 (let ((buffer-read-only nil)
659 (gnus-tmp-indent 0))
660 (erase-buffer)
661 (funcall gnus-generate-tree-function thread 0)
662 (gnus-set-mode-line 'tree)
663 (goto-char (point-min))
664 (gnus-tree-minimize)
665 (gnus-tree-recenter)
666 (let ((selected (selected-window)))
667 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
668 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
669 (gnus-horizontal-recenter)
670 (select-window selected))))))
671
672(defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
673 "Generate a horizontal tree."
674 (let* ((dummy (stringp (car thread)))
675 (do (or dummy
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676 (and (car thread)
677 (memq (mail-header-number (car thread))
678 gnus-tmp-limit))))
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679 col beg)
680 (if (not do)
681 ;; We don't want this article.
682 (setq thread (cdr thread))
683 (if (not (bolp))
684 ;; Not the first article on the line, so we insert a "-".
685 (insert (car gnus-tree-parent-child-edges))
686 ;; If the level isn't zero, then we insert some indentation.
687 (unless (zerop level)
688 (gnus-tree-indent level)
689 (insert (cadr gnus-tree-parent-child-edges))
690 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
691 ;; Draw "|" lines upwards.
692 (while (progn
693 (forward-line -1)
694 (forward-char col)
695 (= (following-char) ? ))
696 (delete-char 1)
697 (insert (caddr gnus-tree-parent-child-edges)))
698 (goto-char beg)))
699 (setq dummyp nil)
700 ;; Insert the article node.
701 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
702 (if (null thread)
703 ;; End of the thread, so we go to the next line.
704 (unless (bolp)
705 (insert "\n"))
706 ;; Recurse downwards in all children of this article.
707 (while thread
708 (gnus-generate-horizontal-tree
709 (pop thread) (if do (1+ level) level)
710 (or dummyp dummy) dummy)))))
711
712(defsubst gnus-tree-indent-vertical ()
713 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
714 (- (point) (gnus-point-at-bol)))))
715 (when (> len 0)
716 (insert (make-string len ? )))))
717
718(defsubst gnus-tree-forward-line (n)
719 (while (>= (decf n) 0)
720 (unless (zerop (forward-line 1))
721 (end-of-line)
722 (insert "\n")))
723 (end-of-line))
724
725(defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
726 "Generate a vertical tree."
727 (let* ((dummy (stringp (car thread)))
728 (do (or dummy
729 (and (car thread)
730 (memq (mail-header-number (car thread))
731 gnus-tmp-limit))))
732 beg)
733 (if (not do)
734 ;; We don't want this article.
735 (setq thread (cdr thread))
736 (if (not (save-excursion (beginning-of-line) (bobp)))
737 ;; Not the first article on the line, so we insert a "-".
738 (progn
739 (gnus-tree-indent-vertical)
740 (insert (make-string (/ gnus-tree-node-length 2) ? ))
741 (insert (caddr gnus-tree-parent-child-edges))
742 (gnus-tree-forward-line 1))
743 ;; If the level isn't zero, then we insert some indentation.
744 (unless (zerop gnus-tmp-indent)
745 (gnus-tree-forward-line (1- (* 2 level)))
746 (gnus-tree-indent-vertical)
747 (delete-char -1)
748 (insert (cadr gnus-tree-parent-child-edges))
749 (setq beg (point))
a8151ef7 750 (forward-char -1)
eec82323 751 ;; Draw "-" lines leftwards.
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752 (while (= (char-after (1- (point))) ? )
753 (delete-char -1)
754 (insert (car gnus-tree-parent-child-edges))
755 (forward-char -1))
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756 (goto-char beg)
757 (gnus-tree-forward-line 1)))
758 (setq dummyp nil)
759 ;; Insert the article node.
760 (gnus-tree-indent-vertical)
761 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
762 (gnus-tree-forward-line 1))
763 (if (null thread)
764 ;; End of the thread, so we go to the next line.
765 (progn
766 (goto-char (point-min))
767 (end-of-line)
768 (incf gnus-tmp-indent))
769 ;; Recurse downwards in all children of this article.
770 (while thread
771 (gnus-generate-vertical-tree
772 (pop thread) (if do (1+ level) level)
773 (or dummyp dummy) dummy)))))
774
775;;; Interface functions.
776
777(defun gnus-possibly-generate-tree (article &optional force)
778 "Generate the thread tree for ARTICLE if it isn't displayed already."
779 (when (save-excursion
780 (set-buffer gnus-summary-buffer)
781 (and gnus-use-trees
782 gnus-show-threads
783 (vectorp (gnus-summary-article-header article))))
784 (save-excursion
785 (let ((top (save-excursion
786 (set-buffer gnus-summary-buffer)
787 (gnus-cut-thread
788 (gnus-remove-thread
789 (mail-header-id
790 (gnus-summary-article-header article))
791 t))))
792 (gnus-tmp-limit gnus-newsgroup-limit)
793 (gnus-tmp-sparse gnus-newsgroup-sparse))
794 (when (or force
795 (not (eq top gnus-tree-displayed-thread)))
796 (gnus-generate-tree top)
797 (setq gnus-tree-displayed-thread top))))))
798
799(defun gnus-tree-open (group)
800 (gnus-get-tree-buffer))
801
802(defun gnus-tree-close (group)
803 ;(gnus-kill-buffer gnus-tree-buffer)
804 )
805
806(defun gnus-highlight-selected-tree (article)
807 "Highlight the selected article in the tree."
808 (let ((buf (current-buffer))
809 region)
810 (set-buffer gnus-tree-buffer)
811 (when (setq region (gnus-tree-article-region article))
812 (when (or (not gnus-selected-tree-overlay)
813 (gnus-extent-detached-p gnus-selected-tree-overlay))
814 ;; Create a new overlay.
815 (gnus-overlay-put
816 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
817 'face gnus-selected-tree-face))
818 ;; Move the overlay to the article.
819 (gnus-move-overlay
820 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
821 (gnus-tree-minimize)
822 (gnus-tree-recenter)
823 (let ((selected (selected-window)))
824 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
825 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
826 (gnus-horizontal-recenter)
827 (select-window selected))))
828 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
829 (save-excursion
830 (set-buffer gnus-tree-buffer)
831 (gnus-set-mode-line 'tree))
832 (set-buffer buf)))
833
834(defun gnus-tree-highlight-article (article face)
835 (save-excursion
836 (set-buffer (gnus-get-tree-buffer))
837 (let (region)
838 (when (setq region (gnus-tree-article-region article))
839 (gnus-put-text-property (car region) (cdr region) 'face face)
840 (set-window-point
841 (get-buffer-window (current-buffer) t) (cdr region))))))
842
843;;;
844;;; gnus-carpal
845;;;
846
847(defvar gnus-carpal-group-buffer-buttons
848 '(("next" . gnus-group-next-unread-group)
849 ("prev" . gnus-group-prev-unread-group)
850 ("read" . gnus-group-read-group)
851 ("select" . gnus-group-select-group)
852 ("catch-up" . gnus-group-catchup-current)
853 ("new-news" . gnus-group-get-new-news-this-group)
854 ("toggle-sub" . gnus-group-unsubscribe-current-group)
855 ("subscribe" . gnus-group-unsubscribe-group)
856 ("kill" . gnus-group-kill-group)
857 ("yank" . gnus-group-yank-group)
858 ("describe" . gnus-group-describe-group)
859 "list"
860 ("subscribed" . gnus-group-list-groups)
861 ("all" . gnus-group-list-all-groups)
862 ("killed" . gnus-group-list-killed)
863 ("zombies" . gnus-group-list-zombies)
864 ("matching" . gnus-group-list-matching)
865 ("post" . gnus-group-post-news)
866 ("mail" . gnus-group-mail)
867 ("rescan" . gnus-group-get-new-news)
868 ("browse-foreign" . gnus-group-browse-foreign)
869 ("exit" . gnus-group-exit)))
870
871(defvar gnus-carpal-summary-buffer-buttons
872 '("mark"
873 ("read" . gnus-summary-mark-as-read-forward)
874 ("tick" . gnus-summary-tick-article-forward)
875 ("clear" . gnus-summary-clear-mark-forward)
876 ("expirable" . gnus-summary-mark-as-expirable)
877 "move"
878 ("scroll" . gnus-summary-next-page)
879 ("next-unread" . gnus-summary-next-unread-article)
880 ("prev-unread" . gnus-summary-prev-unread-article)
881 ("first" . gnus-summary-first-unread-article)
882 ("best" . gnus-summary-best-unread-article)
883 "article"
884 ("headers" . gnus-summary-toggle-header)
885 ("uudecode" . gnus-uu-decode-uu)
886 ("enter-digest" . gnus-summary-enter-digest-group)
887 ("fetch-parent" . gnus-summary-refer-parent-article)
888 "mail"
889 ("move" . gnus-summary-move-article)
890 ("copy" . gnus-summary-copy-article)
891 ("respool" . gnus-summary-respool-article)
892 "threads"
893 ("lower" . gnus-summary-lower-thread)
894 ("kill" . gnus-summary-kill-thread)
895 "post"
896 ("post" . gnus-summary-post-news)
897 ("mail" . gnus-summary-mail)
898 ("followup" . gnus-summary-followup-with-original)
899 ("reply" . gnus-summary-reply-with-original)
900 ("cancel" . gnus-summary-cancel-article)
901 "misc"
902 ("exit" . gnus-summary-exit)
903 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
904
905(defvar gnus-carpal-server-buffer-buttons
906 '(("add" . gnus-server-add-server)
907 ("browse" . gnus-server-browse-server)
908 ("list" . gnus-server-list-servers)
909 ("kill" . gnus-server-kill-server)
910 ("yank" . gnus-server-yank-server)
911 ("copy" . gnus-server-copy-server)
912 ("exit" . gnus-server-exit)))
913
914(defvar gnus-carpal-browse-buffer-buttons
915 '(("subscribe" . gnus-browse-unsubscribe-current-group)
916 ("exit" . gnus-browse-exit)))
917
918(defvar gnus-carpal-group-buffer "*Carpal Group*")
919(defvar gnus-carpal-summary-buffer "*Carpal Summary*")
920(defvar gnus-carpal-server-buffer "*Carpal Server*")
921(defvar gnus-carpal-browse-buffer "*Carpal Browse*")
922
923(defvar gnus-carpal-attached-buffer nil)
924
925(defvar gnus-carpal-mode-hook nil
926 "*Hook run in carpal mode buffers.")
927
928(defvar gnus-carpal-button-face 'bold
929 "*Face used on carpal buttons.")
930
931(defvar gnus-carpal-header-face 'bold-italic
932 "*Face used on carpal buffer headers.")
933
934(defvar gnus-carpal-mode-map nil)
935(put 'gnus-carpal-mode 'mode-class 'special)
936
937(if gnus-carpal-mode-map
938 nil
939 (setq gnus-carpal-mode-map (make-keymap))
940 (suppress-keymap gnus-carpal-mode-map)
941 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
942 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
943 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
944
945(defun gnus-carpal-mode ()
946 "Major mode for clicking buttons.
947
948All normal editing commands are switched off.
949\\<gnus-carpal-mode-map>
950The following commands are available:
951
952\\{gnus-carpal-mode-map}"
953 (interactive)
954 (kill-all-local-variables)
a8151ef7 955 (setq mode-line-modified (cdr gnus-mode-line-modified))
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956 (setq major-mode 'gnus-carpal-mode)
957 (setq mode-name "Gnus Carpal")
958 (setq mode-line-process nil)
959 (use-local-map gnus-carpal-mode-map)
960 (buffer-disable-undo (current-buffer))
961 (setq buffer-read-only t)
962 (make-local-variable 'gnus-carpal-attached-buffer)
963 (run-hooks 'gnus-carpal-mode-hook))
964
965(defun gnus-carpal-setup-buffer (type)
966 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
967 (if (get-buffer buffer)
968 ()
969 (save-excursion
970 (set-buffer (get-buffer-create buffer))
971 (gnus-carpal-mode)
972 (setq gnus-carpal-attached-buffer
973 (intern (format "gnus-%s-buffer" type)))
974 (gnus-add-current-to-buffer-list)
975 (let ((buttons (symbol-value
976 (intern (format "gnus-carpal-%s-buffer-buttons"
977 type))))
978 (buffer-read-only nil)
979 button)
980 (while buttons
981 (setq button (car buttons)
982 buttons (cdr buttons))
983 (if (stringp button)
984 (gnus-set-text-properties
985 (point)
986 (prog2 (insert button) (point) (insert " "))
987 (list 'face gnus-carpal-header-face))
988 (gnus-set-text-properties
989 (point)
990 (prog2 (insert (car button)) (point) (insert " "))
991 (list 'gnus-callback (cdr button)
992 'face gnus-carpal-button-face
993 gnus-mouse-face-prop 'highlight))))
994 (let ((fill-column (- (window-width) 2)))
995 (fill-region (point-min) (point-max)))
996 (set-window-point (get-buffer-window (current-buffer))
997 (point-min)))))))
998
999(defun gnus-carpal-select ()
1000 "Select the button under point."
1001 (interactive)
1002 (let ((func (get-text-property (point) 'gnus-callback)))
1003 (if (null func)
1004 ()
1005 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1006 (call-interactively func))))
1007
1008(defun gnus-carpal-mouse-select (event)
1009 "Select the button under the mouse pointer."
1010 (interactive "e")
1011 (mouse-set-point event)
1012 (gnus-carpal-select))
1013
1014;;; Allow redefinition of functions.
1015(gnus-ems-redefine)
1016
1017(provide 'gnus-salt)
1018
1019;;; gnus-salt.el ends here