Import changes from current Gnus.
[bpt/emacs.git] / lisp / gnus / gnus-salt.el
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eec82323 1;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
6748645f 2;; Copyright (C) 1996,97,98 Free Software Foundation, Inc.
eec82323 3
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4;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5;; Keywords: news
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6
7;; This file is part of GNU Emacs.
8
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)
12;; any later version.
13
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.
18
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.
23
24;;; Commentary:
25
26;;; Code:
27
5ab7173c
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28(eval-when-compile (require 'cl))
29
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30(eval-when-compile (require 'cl))
31
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32(require 'gnus)
33(require 'gnus-sum)
34
35;;;
36;;; gnus-pick-mode
37;;;
38
39(defvar gnus-pick-mode nil
40 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
41
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42(defcustom gnus-pick-display-summary nil
43 "*Display summary while reading."
44 :type 'boolean
45 :group 'gnus-summary-pick)
46
47(defcustom gnus-pick-mode-hook nil
48 "Hook run in summary pick mode buffers."
49 :type 'hook
50 :group 'gnus-summary-pick)
51
52(defcustom gnus-mark-unpicked-articles-as-read nil
53 "*If non-nil, mark all unpicked articles as read."
54 :type 'boolean
55 :group 'gnus-summary-pick)
56
57(defcustom gnus-pick-elegant-flow t
58 "If non-nil, gnus-pick-start-reading will run gnus-summary-next-group when no articles have been picked."
59 :type 'boolean
60 :group 'gnus-summary-pick)
61
62(defcustom gnus-summary-pick-line-format
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63 "%-5P %U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
64 "*The format specification of the lines in pick buffers.
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65It accepts the same format specs that `gnus-summary-line-format' does."
66 :type 'string
67 :group 'gnus-summary-pick)
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68
69;;; Internal variables.
70
71(defvar gnus-pick-mode-map nil)
72
73(unless gnus-pick-mode-map
74 (setq gnus-pick-mode-map (make-sparse-keymap))
75
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76 (gnus-define-keys gnus-pick-mode-map
77 " " gnus-pick-next-page
78 "u" gnus-pick-unmark-article-or-thread
79 "." gnus-pick-article-or-thread
80 gnus-down-mouse-2 gnus-pick-mouse-pick-region
81 "\r" gnus-pick-start-reading
82 ))
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83
84(defun gnus-pick-make-menu-bar ()
85 (unless (boundp 'gnus-pick-menu)
86 (easy-menu-define
87 gnus-pick-menu gnus-pick-mode-map ""
88 '("Pick"
89 ("Pick"
90 ["Article" gnus-summary-mark-as-processable t]
91 ["Thread" gnus-uu-mark-thread t]
92 ["Region" gnus-uu-mark-region t]
6748645f 93 ["Regexp" gnus-uu-mark-by-regexp t]
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94 ["Buffer" gnus-uu-mark-buffer t])
95 ("Unpick"
96 ["Article" gnus-summary-unmark-as-processable t]
97 ["Thread" gnus-uu-unmark-thread t]
98 ["Region" gnus-uu-unmark-region t]
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99 ["Regexp" gnus-uu-unmark-by-regexp t]
100 ["Buffer" gnus-summary-unmark-all-processable t])
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101 ["Start reading" gnus-pick-start-reading t]
102 ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
103
104(defun gnus-pick-mode (&optional arg)
105 "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
106
107\\{gnus-pick-mode-map}"
108 (interactive "P")
109 (when (eq major-mode 'gnus-summary-mode)
110 (if (not (set (make-local-variable 'gnus-pick-mode)
111 (if (null arg) (not gnus-pick-mode)
112 (> (prefix-numeric-value arg) 0))))
113 (remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
114 ;; Make sure that we don't select any articles upon group entry.
115 (set (make-local-variable 'gnus-auto-select-first) nil)
116 ;; Change line format.
117 (setq gnus-summary-line-format gnus-summary-pick-line-format)
118 (setq gnus-summary-line-format-spec nil)
119 (gnus-update-format-specifications nil 'summary)
120 (gnus-update-summary-mark-positions)
121 (add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
122 (set (make-local-variable 'gnus-summary-goto-unread) 'never)
123 ;; Set up the menu.
124 (when (gnus-visual-p 'pick-menu 'menu)
125 (gnus-pick-make-menu-bar))
a8151ef7 126 (gnus-add-minor-mode 'gnus-pick-mode " Pick" gnus-pick-mode-map)
6748645f 127 (gnus-run-hooks 'gnus-pick-mode-hook))))
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128
129(defun gnus-pick-setup-message ()
130 "Make Message do the right thing on exit."
131 (when (and (gnus-buffer-live-p gnus-summary-buffer)
132 (save-excursion
133 (set-buffer gnus-summary-buffer)
134 gnus-pick-mode))
135 (message-add-action
136 '(gnus-configure-windows 'pick t) 'send 'exit 'postpone 'kill)))
137
138(defvar gnus-pick-line-number 1)
139(defun gnus-pick-line-number ()
140 "Return the current line number."
141 (if (bobp)
142 (setq gnus-pick-line-number 1)
143 (incf gnus-pick-line-number)))
144
145(defun gnus-pick-start-reading (&optional catch-up)
146 "Start reading the picked articles.
147If given a prefix, mark all unpicked articles as read."
148 (interactive "P")
149 (if gnus-newsgroup-processable
150 (progn
151 (gnus-summary-limit-to-articles nil)
152 (when (or catch-up gnus-mark-unpicked-articles-as-read)
153 (gnus-summary-limit-mark-excluded-as-read))
154 (gnus-summary-first-article)
155 (gnus-configure-windows
156 (if gnus-pick-display-summary 'article 'pick) t))
157 (if gnus-pick-elegant-flow
158 (progn
159 (when (or catch-up gnus-mark-unpicked-articles-as-read)
a8151ef7 160 (gnus-summary-catchup nil t))
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161 (if (gnus-group-quit-config gnus-newsgroup-name)
162 (gnus-summary-exit)
163 (gnus-summary-next-group)))
164 (error "No articles have been picked"))))
165
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166(defun gnus-pick-goto-article (arg)
167 "Go to the article number indicated by ARG. If ARG is an invalid
168article number, then stay on current line."
169 (let (pos)
170 (save-excursion
171 (goto-char (point-min))
172 (when (zerop (forward-line (1- (prefix-numeric-value arg))))
173 (setq pos (point))))
174 (if (not pos)
175 (gnus-error 2 "No such line: %s" arg)
176 (goto-char pos))))
177
eec82323 178(defun gnus-pick-article (&optional arg)
6748645f 179 "Pick the article on the current line.
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180If ARG, pick the article on that line instead."
181 (interactive "P")
182 (when arg
6748645f 183 (gnus-pick-goto-article arg))
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184 (gnus-summary-mark-as-processable 1))
185
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186(defun gnus-pick-article-or-thread (&optional arg)
187 "If gnus-thread-hide-subtree is t, then pick the thread on the current line.
188Otherwise pick the article on the current line.
189If ARG, pick the article/thread on that line instead."
190 (interactive "P")
191 (when arg
192 (gnus-pick-goto-article arg))
193 (if gnus-thread-hide-subtree
194 (gnus-uu-mark-thread)
195 (gnus-summary-mark-as-processable 1)))
196
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.
199Otherwise unmark the article on current line.
200If ARG, unmark thread/article on that line instead."
201 (interactive "P")
202 (when arg
203 (gnus-pick-goto-article arg))
204 (if gnus-thread-hide-subtree
205 (gnus-uu-unmark-thread)
206 (gnus-summary-unmark-as-processable 1)))
207
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208(defun gnus-pick-mouse-pick (e)
209 (interactive "e")
210 (mouse-set-point e)
211 (save-excursion
212 (gnus-summary-mark-as-processable 1)))
213
214(defun gnus-pick-mouse-pick-region (start-event)
215 "Pick articles that the mouse is dragged over.
216This must be bound to a button-down mouse event."
217 (interactive "e")
218 (mouse-minibuffer-check start-event)
219 (let* ((echo-keystrokes 0)
220 (start-posn (event-start start-event))
221 (start-point (posn-point start-posn))
222 (start-line (1+ (count-lines 1 start-point)))
223 (start-window (posn-window start-posn))
6748645f 224 (bounds (gnus-window-edges start-window))
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225 (top (nth 1 bounds))
226 (bottom (if (window-minibuffer-p start-window)
227 (nth 3 bounds)
228 ;; Don't count the mode line.
229 (1- (nth 3 bounds))))
230 (click-count (1- (event-click-count start-event))))
231 (setq mouse-selection-click-count click-count)
232 (setq mouse-selection-click-count-buffer (current-buffer))
233 (mouse-set-point start-event)
234 ;; In case the down click is in the middle of some intangible text,
235 ;; use the end of that text, and put it in START-POINT.
236 (when (< (point) start-point)
237 (goto-char start-point))
238 (gnus-pick-article)
239 (setq start-point (point))
240 ;; end-of-range is used only in the single-click case.
241 ;; It is the place where the drag has reached so far
242 ;; (but not outside the window where the drag started).
6748645f 243 (let (event end end-point (end-of-range (point)))
eec82323 244 (track-mouse
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245 (while (progn
246 (setq event (cdr (gnus-read-event-char)))
247 (or (mouse-movement-p event)
248 (eq (car-safe event) 'switch-frame)))
249 (if (eq (car-safe event) 'switch-frame)
250 nil
251 (setq end (event-end event)
252 end-point (posn-point end))
253
254 (cond
255 ;; Are we moving within the original window?
256 ((and (eq (posn-window end) start-window)
257 (integer-or-marker-p end-point))
258 ;; Go to START-POINT first, so that when we move to END-POINT,
259 ;; if it's in the middle of intangible text,
260 ;; point jumps in the direction away from START-POINT.
261 (goto-char start-point)
262 (goto-char end-point)
263 (gnus-pick-article)
264 ;; In case the user moved his mouse really fast, pick
265 ;; articles on the line between this one and the last one.
266 (let* ((this-line (1+ (count-lines 1 end-point)))
267 (min-line (min this-line start-line))
268 (max-line (max this-line start-line)))
269 (while (< min-line max-line)
270 (goto-line min-line)
271 (gnus-pick-article)
272 (setq min-line (1+ min-line)))
273 (setq start-line this-line))
274 (when (zerop (% click-count 3))
275 (setq end-of-range (point))))
276 (t
277 (let ((mouse-row (cdr (cdr (mouse-position)))))
278 (cond
279 ((null mouse-row))
280 ((< mouse-row top)
281 (mouse-scroll-subr start-window (- mouse-row top)))
282 ((>= mouse-row bottom)
283 (mouse-scroll-subr start-window
284 (1+ (- mouse-row bottom)))))))))))
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285 (when (consp event)
286 (let ((fun (key-binding (vector (car event)))))
287 ;; Run the binding of the terminating up-event, if possible.
288 ;; In the case of a multiple click, it gives the wrong results,
289 ;; because it would fail to set up a region.
290 (when nil
291 ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
292 ;; In this case, we can just let the up-event execute normally.
293 (let ((end (event-end event)))
294 ;; Set the position in the event before we replay it,
295 ;; because otherwise it may have a position in the wrong
296 ;; buffer.
297 (setcar (cdr end) end-of-range)
298 ;; Delete the overlay before calling the function,
299 ;; because delete-overlay increases buffer-modified-tick.
300 (push event unread-command-events))))))))
301
302(defun gnus-pick-next-page ()
303 "Go to the next page. If at the end of the buffer, start reading articles."
304 (interactive)
305 (let ((scroll-in-place nil))
306 (condition-case nil
307 (scroll-up)
308 (end-of-buffer (gnus-pick-start-reading)))))
309
310;;;
311;;; gnus-binary-mode
312;;;
313
314(defvar gnus-binary-mode nil
315 "Minor mode for providing a binary group interface in Gnus summary buffers.")
316
317(defvar gnus-binary-mode-hook nil
318 "Hook run in summary binary mode buffers.")
319
320(defvar gnus-binary-mode-map nil)
321
322(unless gnus-binary-mode-map
323 (setq gnus-binary-mode-map (make-sparse-keymap))
324
325 (gnus-define-keys
326 gnus-binary-mode-map
327 "g" gnus-binary-show-article))
328
329(defun gnus-binary-make-menu-bar ()
330 (unless (boundp 'gnus-binary-menu)
331 (easy-menu-define
332 gnus-binary-menu gnus-binary-mode-map ""
333 '("Pick"
334 ["Switch binary mode off" gnus-binary-mode t]))))
335
336(defun gnus-binary-mode (&optional arg)
337 "Minor mode for providing a binary group interface in Gnus summary buffers."
338 (interactive "P")
339 (when (eq major-mode 'gnus-summary-mode)
340 (make-local-variable 'gnus-binary-mode)
341 (setq gnus-binary-mode
342 (if (null arg) (not gnus-binary-mode)
343 (> (prefix-numeric-value arg) 0)))
344 (when gnus-binary-mode
345 ;; Make sure that we don't select any articles upon group entry.
346 (make-local-variable 'gnus-auto-select-first)
347 (setq gnus-auto-select-first nil)
348 (make-local-variable 'gnus-summary-display-article-function)
349 (setq gnus-summary-display-article-function 'gnus-binary-display-article)
350 ;; Set up the menu.
351 (when (gnus-visual-p 'binary-menu 'menu)
352 (gnus-binary-make-menu-bar))
a8151ef7 353 (gnus-add-minor-mode 'gnus-binary-mode " Binary" gnus-binary-mode-map)
6748645f 354 (gnus-run-hooks 'gnus-binary-mode-hook))))
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355
356(defun gnus-binary-display-article (article &optional all-header)
357 "Run ARTICLE through the binary decode functions."
358 (when (gnus-summary-goto-subject article)
359 (let ((gnus-view-pseudos 'automatic))
360 (gnus-uu-decode-uu))))
361
362(defun gnus-binary-show-article (&optional arg)
363 "Bypass the binary functions and show the article."
364 (interactive "P")
365 (let (gnus-summary-display-article-function)
366 (gnus-summary-show-article arg)))
367
368;;;
369;;; gnus-tree-mode
370;;;
371
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372(defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
373 "Format of tree elements."
374 :type 'string
375 :group 'gnus-summary-tree)
eec82323 376
a8151ef7 377(defcustom gnus-tree-minimize-window t
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378 "If non-nil, minimize the tree buffer window.
379If a number, never let the tree buffer grow taller than that number of
a8151ef7 380lines."
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381 :type '(choice boolean
382 integer)
a8151ef7 383 :group 'gnus-summary-tree)
eec82323 384
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385(defcustom gnus-selected-tree-face 'modeline
386 "*Face used for highlighting selected articles in the thread tree."
387 :type 'face
388 :group 'gnus-summary-tree)
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389
390(defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
391 (?\{ . ?\}) (?< . ?>))
392 "Brackets used in tree nodes.")
393
394(defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
395 "Characters used to connect parents with children.")
396
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397(defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
398 "*The format specification for the tree mode line."
399 :type 'string
400 :group 'gnus-summary-tree)
eec82323 401
a8151ef7 402(defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
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403 "*Function for generating a thread tree.
404Two predefined functions are available:
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405`gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
406 :type '(radio (function-item gnus-generate-vertical-tree)
407 (function-item gnus-generate-horizontal-tree)
408 (function :tag "Other" nil))
409 :group 'gnus-summary-tree)
eec82323 410
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411(defcustom gnus-tree-mode-hook nil
412 "*Hook run in tree mode buffers."
413 :type 'hook
414 :group 'gnus-summary-tree)
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415
416;;; Internal variables.
417
418(defvar gnus-tree-line-format-alist
419 `((?n gnus-tmp-name ?s)
420 (?f gnus-tmp-from ?s)
421 (?N gnus-tmp-number ?d)
422 (?\[ gnus-tmp-open-bracket ?c)
423 (?\] gnus-tmp-close-bracket ?c)
424 (?s gnus-tmp-subject ?s)))
425
426(defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
427
428(defvar gnus-tree-mode-line-format-spec nil)
429(defvar gnus-tree-line-format-spec nil)
430
431(defvar gnus-tree-node-length nil)
432(defvar gnus-selected-tree-overlay nil)
433
434(defvar gnus-tree-displayed-thread nil)
435
436(defvar gnus-tree-mode-map nil)
437(put 'gnus-tree-mode 'mode-class 'special)
438
439(unless gnus-tree-mode-map
440 (setq gnus-tree-mode-map (make-keymap))
441 (suppress-keymap gnus-tree-mode-map)
442 (gnus-define-keys
443 gnus-tree-mode-map
444 "\r" gnus-tree-select-article
445 gnus-mouse-2 gnus-tree-pick-article
446 "\C-?" gnus-tree-read-summary-keys
a8151ef7 447 "h" gnus-tree-show-summary
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448
449 "\C-c\C-i" gnus-info-find-node)
450
451 (substitute-key-definition
452 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
453
454(defun gnus-tree-make-menu-bar ()
455 (unless (boundp 'gnus-tree-menu)
456 (easy-menu-define
457 gnus-tree-menu gnus-tree-mode-map ""
458 '("Tree"
459 ["Select article" gnus-tree-select-article t]))))
460
461(defun gnus-tree-mode ()
462 "Major mode for displaying thread trees."
463 (interactive)
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464 (gnus-set-format 'tree-mode)
465 (gnus-set-format 'tree t)
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466 (when (gnus-visual-p 'tree-menu 'menu)
467 (gnus-tree-make-menu-bar))
468 (kill-all-local-variables)
469 (gnus-simplify-mode-line)
470 (setq mode-name "Tree")
471 (setq major-mode 'gnus-tree-mode)
472 (use-local-map gnus-tree-mode-map)
473 (buffer-disable-undo (current-buffer))
474 (setq buffer-read-only t)
475 (setq truncate-lines t)
476 (save-excursion
477 (gnus-set-work-buffer)
478 (gnus-tree-node-insert (make-mail-header "") nil)
479 (setq gnus-tree-node-length (1- (point))))
6748645f 480 (gnus-run-hooks 'gnus-tree-mode-hook))
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481
482(defun gnus-tree-read-summary-keys (&optional arg)
483 "Read a summary buffer key sequence and execute it."
484 (interactive "P")
485 (let ((buf (current-buffer))
486 win)
6748645f 487 (set-buffer gnus-article-buffer)
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488 (gnus-article-read-summary-keys arg nil t)
489 (when (setq win (get-buffer-window buf))
490 (select-window win)
491 (when gnus-selected-tree-overlay
492 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
493 (gnus-tree-minimize))))
494
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495(defun gnus-tree-show-summary ()
496 "Reconfigure windows to show summary buffer."
497 (interactive)
498 (if (not (gnus-buffer-live-p gnus-summary-buffer))
499 (error "There is no summary buffer for this tree buffer")
500 (gnus-configure-windows 'article)
501 (gnus-summary-goto-subject gnus-current-article)))
502
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503(defun gnus-tree-select-article (article)
504 "Select the article under point, if any."
505 (interactive (list (gnus-tree-article-number)))
506 (let ((buf (current-buffer)))
507 (when article
508 (save-excursion
509 (set-buffer gnus-summary-buffer)
510 (gnus-summary-goto-article article))
511 (select-window (get-buffer-window buf)))))
512
513(defun gnus-tree-pick-article (e)
514 "Select the article under the mouse pointer."
515 (interactive "e")
516 (mouse-set-point e)
517 (gnus-tree-select-article (gnus-tree-article-number)))
518
519(defun gnus-tree-article-number ()
520 (get-text-property (point) 'gnus-number))
521
522(defun gnus-tree-article-region (article)
523 "Return a cons with BEG and END of the article region."
524 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
525 (when pos
526 (cons pos (next-single-property-change pos 'gnus-number)))))
527
528(defun gnus-tree-goto-article (article)
529 (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
530 (when pos
531 (goto-char pos))))
532
533(defun gnus-tree-recenter ()
534 "Center point in the tree window."
535 (let ((selected (selected-window))
536 (tree-window (get-buffer-window gnus-tree-buffer t)))
537 (when tree-window
538 (select-window tree-window)
539 (when gnus-selected-tree-overlay
540 (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
541 (let* ((top (cond ((< (window-height) 4) 0)
542 ((< (window-height) 7) 1)
543 (t 2)))
544 (height (1- (window-height)))
545 (bottom (save-excursion (goto-char (point-max))
546 (forward-line (- height))
547 (point))))
548 ;; Set the window start to either `bottom', which is the biggest
549 ;; possible valid number, or the second line from the top,
550 ;; whichever is the least.
551 (set-window-start
552 tree-window (min bottom (save-excursion
553 (forward-line (- top)) (point)))))
554 (select-window selected))))
555
556(defun gnus-get-tree-buffer ()
557 "Return the tree buffer properly initialized."
558 (save-excursion
6748645f 559 (set-buffer (gnus-get-buffer-create gnus-tree-buffer))
eec82323 560 (unless (eq major-mode 'gnus-tree-mode)
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561 (gnus-tree-mode))
562 (current-buffer)))
563
564(defun gnus-tree-minimize ()
565 (when (and gnus-tree-minimize-window
566 (not (one-window-p)))
567 (let ((windows 0)
568 tot-win-height)
569 (walk-windows (lambda (window) (incf windows)))
570 (setq tot-win-height
571 (- (frame-height)
572 (* window-min-height (1- windows))
573 2))
574 (let* ((window-min-height 2)
575 (height (count-lines (point-min) (point-max)))
576 (min (max (1- window-min-height) height))
577 (tot (if (numberp gnus-tree-minimize-window)
578 (min gnus-tree-minimize-window min)
579 min))
580 (win (get-buffer-window (current-buffer)))
581 (wh (and win (1- (window-height win)))))
582 (setq tot (min tot tot-win-height))
583 (when (and win
584 (not (eq tot wh)))
585 (let ((selected (selected-window)))
586 (when (ignore-errors (select-window win))
587 (enlarge-window (- tot wh))
588 (select-window selected))))))))
589
590;;; Generating the tree.
591
592(defun gnus-tree-node-insert (header sparse &optional adopted)
593 (let* ((dummy (stringp header))
594 (header (if (vectorp header) header
595 (progn
596 (setq header (make-mail-header "*****"))
597 (mail-header-set-number header 0)
598 (mail-header-set-lines header 0)
599 (mail-header-set-chars header 0)
600 header)))
601 (gnus-tmp-from (mail-header-from header))
602 (gnus-tmp-subject (mail-header-subject header))
603 (gnus-tmp-number (mail-header-number header))
604 (gnus-tmp-name
605 (cond
606 ((string-match "(.+)" gnus-tmp-from)
607 (substring gnus-tmp-from
608 (1+ (match-beginning 0)) (1- (match-end 0))))
609 ((string-match "<[^>]+> *$" gnus-tmp-from)
610 (let ((beg (match-beginning 0)))
611 (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
612 (substring gnus-tmp-from (1+ (match-beginning 0))
613 (1- (match-end 0))))
614 (substring gnus-tmp-from 0 beg))))
615 ((memq gnus-tmp-number sparse)
616 "***")
617 (t gnus-tmp-from)))
618 (gnus-tmp-open-bracket
619 (cond ((memq gnus-tmp-number sparse)
620 (caadr gnus-tree-brackets))
621 (dummy (caaddr gnus-tree-brackets))
622 (adopted (car (nth 3 gnus-tree-brackets)))
623 (t (caar gnus-tree-brackets))))
624 (gnus-tmp-close-bracket
625 (cond ((memq gnus-tmp-number sparse)
626 (cdadr gnus-tree-brackets))
627 (adopted (cdr (nth 3 gnus-tree-brackets)))
628 (dummy
629 (cdaddr gnus-tree-brackets))
630 (t (cdar gnus-tree-brackets))))
631 (buffer-read-only nil)
632 beg end)
633 (gnus-add-text-properties
634 (setq beg (point))
635 (setq end (progn (eval gnus-tree-line-format-spec) (point)))
636 (list 'gnus-number gnus-tmp-number))
637 (when (or t (gnus-visual-p 'tree-highlight 'highlight))
638 (gnus-tree-highlight-node gnus-tmp-number beg end))))
639
640(defun gnus-tree-highlight-node (article beg end)
641 "Highlight current line according to `gnus-summary-highlight'."
642 (let ((list gnus-summary-highlight)
643 face)
644 (save-excursion
645 (set-buffer gnus-summary-buffer)
646 (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
647 gnus-summary-default-score 0))
648 (default gnus-summary-default-score)
649 (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
650 ;; Eval the cars of the lists until we find a match.
651 (while (and list
652 (not (eval (caar list))))
653 (setq list (cdr list)))))
654 (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
6748645f 655 (gnus-put-text-property-excluding-characters-with-faces
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656 beg end 'face
657 (if (boundp face) (symbol-value face) face)))))
658
659(defun gnus-tree-indent (level)
660 (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
661
662(defvar gnus-tmp-limit)
663(defvar gnus-tmp-sparse)
664(defvar gnus-tmp-indent)
665
666(defun gnus-generate-tree (thread)
667 "Generate a thread tree for THREAD."
668 (save-excursion
669 (set-buffer (gnus-get-tree-buffer))
670 (let ((buffer-read-only nil)
671 (gnus-tmp-indent 0))
672 (erase-buffer)
673 (funcall gnus-generate-tree-function thread 0)
674 (gnus-set-mode-line 'tree)
675 (goto-char (point-min))
676 (gnus-tree-minimize)
677 (gnus-tree-recenter)
678 (let ((selected (selected-window)))
679 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
680 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
681 (gnus-horizontal-recenter)
682 (select-window selected))))))
683
684(defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
685 "Generate a horizontal tree."
686 (let* ((dummy (stringp (car thread)))
687 (do (or dummy
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688 (and (car thread)
689 (memq (mail-header-number (car thread))
690 gnus-tmp-limit))))
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691 col beg)
692 (if (not do)
693 ;; We don't want this article.
694 (setq thread (cdr thread))
695 (if (not (bolp))
696 ;; Not the first article on the line, so we insert a "-".
697 (insert (car gnus-tree-parent-child-edges))
698 ;; If the level isn't zero, then we insert some indentation.
699 (unless (zerop level)
700 (gnus-tree-indent level)
701 (insert (cadr gnus-tree-parent-child-edges))
702 (setq col (- (setq beg (point)) (gnus-point-at-bol) 1))
703 ;; Draw "|" lines upwards.
704 (while (progn
705 (forward-line -1)
706 (forward-char col)
707 (= (following-char) ? ))
708 (delete-char 1)
709 (insert (caddr gnus-tree-parent-child-edges)))
710 (goto-char beg)))
711 (setq dummyp nil)
712 ;; Insert the article node.
713 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
714 (if (null thread)
715 ;; End of the thread, so we go to the next line.
716 (unless (bolp)
717 (insert "\n"))
718 ;; Recurse downwards in all children of this article.
719 (while thread
720 (gnus-generate-horizontal-tree
721 (pop thread) (if do (1+ level) level)
722 (or dummyp dummy) dummy)))))
723
724(defsubst gnus-tree-indent-vertical ()
725 (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
726 (- (point) (gnus-point-at-bol)))))
727 (when (> len 0)
728 (insert (make-string len ? )))))
729
730(defsubst gnus-tree-forward-line (n)
731 (while (>= (decf n) 0)
732 (unless (zerop (forward-line 1))
733 (end-of-line)
734 (insert "\n")))
735 (end-of-line))
736
737(defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
738 "Generate a vertical tree."
739 (let* ((dummy (stringp (car thread)))
740 (do (or dummy
741 (and (car thread)
742 (memq (mail-header-number (car thread))
743 gnus-tmp-limit))))
744 beg)
745 (if (not do)
746 ;; We don't want this article.
747 (setq thread (cdr thread))
748 (if (not (save-excursion (beginning-of-line) (bobp)))
749 ;; Not the first article on the line, so we insert a "-".
750 (progn
751 (gnus-tree-indent-vertical)
752 (insert (make-string (/ gnus-tree-node-length 2) ? ))
753 (insert (caddr gnus-tree-parent-child-edges))
754 (gnus-tree-forward-line 1))
755 ;; If the level isn't zero, then we insert some indentation.
756 (unless (zerop gnus-tmp-indent)
757 (gnus-tree-forward-line (1- (* 2 level)))
758 (gnus-tree-indent-vertical)
759 (delete-char -1)
760 (insert (cadr gnus-tree-parent-child-edges))
761 (setq beg (point))
a8151ef7 762 (forward-char -1)
eec82323 763 ;; Draw "-" lines leftwards.
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764 (while (and (> (point) 1)
765 (= (char-after (1- (point))) ? ))
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766 (delete-char -1)
767 (insert (car gnus-tree-parent-child-edges))
768 (forward-char -1))
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769 (goto-char beg)
770 (gnus-tree-forward-line 1)))
771 (setq dummyp nil)
772 ;; Insert the article node.
773 (gnus-tree-indent-vertical)
774 (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
775 (gnus-tree-forward-line 1))
776 (if (null thread)
777 ;; End of the thread, so we go to the next line.
778 (progn
779 (goto-char (point-min))
780 (end-of-line)
781 (incf gnus-tmp-indent))
782 ;; Recurse downwards in all children of this article.
783 (while thread
784 (gnus-generate-vertical-tree
785 (pop thread) (if do (1+ level) level)
786 (or dummyp dummy) dummy)))))
787
788;;; Interface functions.
789
790(defun gnus-possibly-generate-tree (article &optional force)
791 "Generate the thread tree for ARTICLE if it isn't displayed already."
792 (when (save-excursion
793 (set-buffer gnus-summary-buffer)
794 (and gnus-use-trees
795 gnus-show-threads
796 (vectorp (gnus-summary-article-header article))))
797 (save-excursion
798 (let ((top (save-excursion
799 (set-buffer gnus-summary-buffer)
800 (gnus-cut-thread
801 (gnus-remove-thread
802 (mail-header-id
803 (gnus-summary-article-header article))
804 t))))
805 (gnus-tmp-limit gnus-newsgroup-limit)
806 (gnus-tmp-sparse gnus-newsgroup-sparse))
807 (when (or force
808 (not (eq top gnus-tree-displayed-thread)))
809 (gnus-generate-tree top)
810 (setq gnus-tree-displayed-thread top))))))
811
812(defun gnus-tree-open (group)
813 (gnus-get-tree-buffer))
814
815(defun gnus-tree-close (group)
6748645f 816 (gnus-kill-buffer gnus-tree-buffer))
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817
818(defun gnus-highlight-selected-tree (article)
819 "Highlight the selected article in the tree."
820 (let ((buf (current-buffer))
821 region)
822 (set-buffer gnus-tree-buffer)
823 (when (setq region (gnus-tree-article-region article))
824 (when (or (not gnus-selected-tree-overlay)
825 (gnus-extent-detached-p gnus-selected-tree-overlay))
826 ;; Create a new overlay.
827 (gnus-overlay-put
828 (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2))
829 'face gnus-selected-tree-face))
830 ;; Move the overlay to the article.
831 (gnus-move-overlay
832 gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
833 (gnus-tree-minimize)
834 (gnus-tree-recenter)
835 (let ((selected (selected-window)))
836 (when (get-buffer-window (set-buffer gnus-tree-buffer) t)
837 (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t))
838 (gnus-horizontal-recenter)
839 (select-window selected))))
840 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
841 (save-excursion
842 (set-buffer gnus-tree-buffer)
843 (gnus-set-mode-line 'tree))
844 (set-buffer buf)))
845
846(defun gnus-tree-highlight-article (article face)
847 (save-excursion
848 (set-buffer (gnus-get-tree-buffer))
849 (let (region)
850 (when (setq region (gnus-tree-article-region article))
851 (gnus-put-text-property (car region) (cdr region) 'face face)
852 (set-window-point
853 (get-buffer-window (current-buffer) t) (cdr region))))))
854
855;;;
856;;; gnus-carpal
857;;;
858
859(defvar gnus-carpal-group-buffer-buttons
860 '(("next" . gnus-group-next-unread-group)
861 ("prev" . gnus-group-prev-unread-group)
862 ("read" . gnus-group-read-group)
863 ("select" . gnus-group-select-group)
864 ("catch-up" . gnus-group-catchup-current)
865 ("new-news" . gnus-group-get-new-news-this-group)
866 ("toggle-sub" . gnus-group-unsubscribe-current-group)
867 ("subscribe" . gnus-group-unsubscribe-group)
868 ("kill" . gnus-group-kill-group)
869 ("yank" . gnus-group-yank-group)
870 ("describe" . gnus-group-describe-group)
871 "list"
872 ("subscribed" . gnus-group-list-groups)
873 ("all" . gnus-group-list-all-groups)
874 ("killed" . gnus-group-list-killed)
875 ("zombies" . gnus-group-list-zombies)
876 ("matching" . gnus-group-list-matching)
877 ("post" . gnus-group-post-news)
878 ("mail" . gnus-group-mail)
879 ("rescan" . gnus-group-get-new-news)
880 ("browse-foreign" . gnus-group-browse-foreign)
881 ("exit" . gnus-group-exit)))
882
883(defvar gnus-carpal-summary-buffer-buttons
884 '("mark"
885 ("read" . gnus-summary-mark-as-read-forward)
886 ("tick" . gnus-summary-tick-article-forward)
887 ("clear" . gnus-summary-clear-mark-forward)
888 ("expirable" . gnus-summary-mark-as-expirable)
889 "move"
890 ("scroll" . gnus-summary-next-page)
891 ("next-unread" . gnus-summary-next-unread-article)
892 ("prev-unread" . gnus-summary-prev-unread-article)
893 ("first" . gnus-summary-first-unread-article)
894 ("best" . gnus-summary-best-unread-article)
895 "article"
896 ("headers" . gnus-summary-toggle-header)
897 ("uudecode" . gnus-uu-decode-uu)
898 ("enter-digest" . gnus-summary-enter-digest-group)
899 ("fetch-parent" . gnus-summary-refer-parent-article)
900 "mail"
901 ("move" . gnus-summary-move-article)
902 ("copy" . gnus-summary-copy-article)
903 ("respool" . gnus-summary-respool-article)
904 "threads"
905 ("lower" . gnus-summary-lower-thread)
906 ("kill" . gnus-summary-kill-thread)
907 "post"
908 ("post" . gnus-summary-post-news)
909 ("mail" . gnus-summary-mail)
910 ("followup" . gnus-summary-followup-with-original)
911 ("reply" . gnus-summary-reply-with-original)
912 ("cancel" . gnus-summary-cancel-article)
913 "misc"
914 ("exit" . gnus-summary-exit)
915 ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
916
917(defvar gnus-carpal-server-buffer-buttons
918 '(("add" . gnus-server-add-server)
919 ("browse" . gnus-server-browse-server)
920 ("list" . gnus-server-list-servers)
921 ("kill" . gnus-server-kill-server)
922 ("yank" . gnus-server-yank-server)
923 ("copy" . gnus-server-copy-server)
924 ("exit" . gnus-server-exit)))
925
926(defvar gnus-carpal-browse-buffer-buttons
927 '(("subscribe" . gnus-browse-unsubscribe-current-group)
928 ("exit" . gnus-browse-exit)))
929
930(defvar gnus-carpal-group-buffer "*Carpal Group*")
931(defvar gnus-carpal-summary-buffer "*Carpal Summary*")
932(defvar gnus-carpal-server-buffer "*Carpal Server*")
933(defvar gnus-carpal-browse-buffer "*Carpal Browse*")
934
935(defvar gnus-carpal-attached-buffer nil)
936
937(defvar gnus-carpal-mode-hook nil
938 "*Hook run in carpal mode buffers.")
939
940(defvar gnus-carpal-button-face 'bold
941 "*Face used on carpal buttons.")
942
943(defvar gnus-carpal-header-face 'bold-italic
944 "*Face used on carpal buffer headers.")
945
946(defvar gnus-carpal-mode-map nil)
947(put 'gnus-carpal-mode 'mode-class 'special)
948
949(if gnus-carpal-mode-map
950 nil
951 (setq gnus-carpal-mode-map (make-keymap))
952 (suppress-keymap gnus-carpal-mode-map)
953 (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
954 (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
955 (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
956
957(defun gnus-carpal-mode ()
958 "Major mode for clicking buttons.
959
960All normal editing commands are switched off.
961\\<gnus-carpal-mode-map>
962The following commands are available:
963
964\\{gnus-carpal-mode-map}"
965 (interactive)
966 (kill-all-local-variables)
a8151ef7 967 (setq mode-line-modified (cdr gnus-mode-line-modified))
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968 (setq major-mode 'gnus-carpal-mode)
969 (setq mode-name "Gnus Carpal")
970 (setq mode-line-process nil)
971 (use-local-map gnus-carpal-mode-map)
972 (buffer-disable-undo (current-buffer))
973 (setq buffer-read-only t)
974 (make-local-variable 'gnus-carpal-attached-buffer)
6748645f 975 (gnus-run-hooks 'gnus-carpal-mode-hook))
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976
977(defun gnus-carpal-setup-buffer (type)
978 (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
979 (if (get-buffer buffer)
980 ()
981 (save-excursion
6748645f 982 (set-buffer (gnus-get-buffer-create buffer))
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983 (gnus-carpal-mode)
984 (setq gnus-carpal-attached-buffer
985 (intern (format "gnus-%s-buffer" type)))
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986 (let ((buttons (symbol-value
987 (intern (format "gnus-carpal-%s-buffer-buttons"
988 type))))
989 (buffer-read-only nil)
990 button)
991 (while buttons
992 (setq button (car buttons)
993 buttons (cdr buttons))
994 (if (stringp button)
995 (gnus-set-text-properties
996 (point)
997 (prog2 (insert button) (point) (insert " "))
998 (list 'face gnus-carpal-header-face))
999 (gnus-set-text-properties
1000 (point)
1001 (prog2 (insert (car button)) (point) (insert " "))
1002 (list 'gnus-callback (cdr button)
1003 'face gnus-carpal-button-face
1004 gnus-mouse-face-prop 'highlight))))
1005 (let ((fill-column (- (window-width) 2)))
1006 (fill-region (point-min) (point-max)))
1007 (set-window-point (get-buffer-window (current-buffer))
1008 (point-min)))))))
1009
1010(defun gnus-carpal-select ()
1011 "Select the button under point."
1012 (interactive)
1013 (let ((func (get-text-property (point) 'gnus-callback)))
1014 (if (null func)
1015 ()
1016 (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1017 (call-interactively func))))
1018
1019(defun gnus-carpal-mouse-select (event)
1020 "Select the button under the mouse pointer."
1021 (interactive "e")
1022 (mouse-set-point event)
1023 (gnus-carpal-select))
1024
1025;;; Allow redefinition of functions.
1026(gnus-ems-redefine)
1027
1028(provide 'gnus-salt)
1029
1030;;; gnus-salt.el ends here