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526baa41 LMI |
1 | ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus |
2 | ;; Copyright (C) 1996 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 | ||
27 | (require 'gnus) | |
28 | (eval-when-compile (require 'cl)) | |
29 | ||
30 | ;;; | |
31 | ;;; gnus-pick-mode | |
32 | ;;; | |
33 | ||
34 | (defvar gnus-pick-mode nil | |
35 | "Minor mode for providing a pick-and-read interface in Gnus summary buffers.") | |
36 | ||
37 | (defvar gnus-pick-display-summary nil | |
38 | "*Display summary while reading.") | |
39 | ||
40 | (defvar gnus-pick-mode-hook nil | |
41 | "Hook run in summary pick mode buffers.") | |
42 | ||
43 | ;;; Internal variables. | |
44 | ||
45 | (defvar gnus-pick-mode-map nil) | |
46 | ||
47 | (unless gnus-pick-mode-map | |
48 | (setq gnus-pick-mode-map (make-sparse-keymap)) | |
49 | ||
50 | (gnus-define-keys | |
51 | gnus-pick-mode-map | |
52 | "t" gnus-uu-mark-thread | |
53 | "T" gnus-uu-unmark-thread | |
54 | " " gnus-summary-mark-as-processable | |
55 | "u" gnus-summary-unmark-as-processable | |
56 | "U" gnus-summary-unmark-all-processable | |
57 | "v" gnus-uu-mark-over | |
58 | "r" gnus-uu-mark-region | |
59 | "R" gnus-uu-unmark-region | |
60 | "e" gnus-uu-mark-by-regexp | |
61 | "E" gnus-uu-mark-by-regexp | |
62 | "b" gnus-uu-mark-buffer | |
63 | "B" gnus-uu-unmark-buffer | |
64 | "\r" gnus-pick-start-reading)) | |
65 | ||
66 | (defun gnus-pick-make-menu-bar () | |
67 | (unless (boundp 'gnus-pick-menu) | |
68 | (easy-menu-define | |
69 | gnus-pick-menu gnus-pick-mode-map "" | |
70 | '("Pick" | |
71 | ("Pick" | |
72 | ["Article" gnus-summary-mark-as-processable t] | |
73 | ["Thread" gnus-uu-mark-thread t] | |
74 | ["Region" gnus-uu-mark-region t] | |
75 | ["Regexp" gnus-uu-mark-regexp t] | |
76 | ["Buffer" gnus-uu-mark-buffer t]) | |
77 | ("Unpick" | |
78 | ["Article" gnus-summary-unmark-as-processable t] | |
79 | ["Thread" gnus-uu-unmark-thread t] | |
80 | ["Region" gnus-uu-unmark-region t] | |
81 | ["Regexp" gnus-uu-unmark-regexp t] | |
82 | ["Buffer" gnus-uu-unmark-buffer t]) | |
83 | ["Start reading" gnus-pick-start-reading t] | |
84 | ["Switch pick mode off" gnus-pick-mode gnus-pick-mode])))) | |
85 | ||
86 | (defun gnus-pick-mode (&optional arg) | |
87 | "Minor mode for providing a pick-and-read interface in Gnus summary buffers. | |
88 | ||
89 | \\{gnus-pick-mode-map}" | |
90 | (interactive "P") | |
91 | (when (eq major-mode 'gnus-summary-mode) | |
92 | (make-local-variable 'gnus-pick-mode) | |
93 | (setq gnus-pick-mode | |
94 | (if (null arg) (not gnus-pick-mode) | |
95 | (> (prefix-numeric-value arg) 0))) | |
96 | (when gnus-pick-mode | |
97 | ;; Make sure that we don't select any articles upon group entry. | |
98 | (make-local-variable 'gnus-auto-select-first) | |
99 | (setq gnus-auto-select-first nil) | |
100 | ;; Set up the menu. | |
101 | (when (and menu-bar-mode | |
102 | (gnus-visual-p 'pick-menu 'menu)) | |
103 | (gnus-pick-make-menu-bar)) | |
104 | (unless (assq 'gnus-pick-mode minor-mode-alist) | |
105 | (push '(gnus-pick-mode " Pick") minor-mode-alist)) | |
106 | (unless (assq 'gnus-pick-mode minor-mode-map-alist) | |
107 | (push (cons 'gnus-pick-mode gnus-pick-mode-map) | |
108 | minor-mode-map-alist)) | |
109 | (run-hooks 'gnus-pick-mode-hook)))) | |
110 | ||
111 | (defun gnus-pick-start-reading (&optional catch-up) | |
112 | "Start reading the picked articles. | |
113 | If given a prefix, mark all unpicked articles as read." | |
114 | (interactive "P") | |
115 | (unless gnus-newsgroup-processable | |
116 | (error "No articles have been picked")) | |
117 | (gnus-summary-limit-to-articles nil) | |
118 | (when catch-up | |
119 | (gnus-summary-limit-mark-excluded-as-read)) | |
120 | (gnus-summary-first-unread-article) | |
121 | (gnus-configure-windows (if gnus-pick-display-summary 'article 'pick) t)) | |
122 | ||
123 | ||
124 | ;;; | |
125 | ;;; gnus-binary-mode | |
126 | ;;; | |
127 | ||
128 | (defvar gnus-binary-mode nil | |
129 | "Minor mode for provind a binary group interface in Gnus summary buffers.") | |
130 | ||
131 | (defvar gnus-binary-mode-hook nil | |
132 | "Hook run in summary binary mode buffers.") | |
133 | ||
134 | (defvar gnus-binary-mode-map nil) | |
135 | ||
136 | (unless gnus-binary-mode-map | |
137 | (setq gnus-binary-mode-map (make-sparse-keymap)) | |
138 | ||
139 | (gnus-define-keys | |
140 | gnus-binary-mode-map | |
141 | "g" gnus-binary-show-article)) | |
142 | ||
143 | (defun gnus-binary-make-menu-bar () | |
144 | (unless (boundp 'gnus-binary-menu) | |
145 | (easy-menu-define | |
146 | gnus-binary-menu gnus-binary-mode-map "" | |
147 | '("Pick" | |
148 | ["Switch binary mode off" gnus-binary-mode t])))) | |
149 | ||
150 | (defun gnus-binary-mode (&optional arg) | |
151 | "Minor mode for providing a binary group interface in Gnus summary buffers." | |
152 | (interactive "P") | |
153 | (when (eq major-mode 'gnus-summary-mode) | |
154 | (make-local-variable 'gnus-binary-mode) | |
155 | (setq gnus-binary-mode | |
156 | (if (null arg) (not gnus-binary-mode) | |
157 | (> (prefix-numeric-value arg) 0))) | |
158 | (when gnus-binary-mode | |
159 | ;; Make sure that we don't select any articles upon group entry. | |
160 | (make-local-variable 'gnus-auto-select-first) | |
161 | (setq gnus-auto-select-first nil) | |
162 | (make-local-variable 'gnus-summary-display-article-function) | |
163 | (setq gnus-summary-display-article-function 'gnus-binary-display-article) | |
164 | ;; Set up the menu. | |
165 | (when (and menu-bar-mode | |
166 | (gnus-visual-p 'binary-menu 'menu)) | |
167 | (gnus-binary-make-menu-bar)) | |
168 | (unless (assq 'gnus-binary-mode minor-mode-alist) | |
169 | (push '(gnus-binary-mode " Binary") minor-mode-alist)) | |
170 | (unless (assq 'gnus-binary-mode minor-mode-map-alist) | |
171 | (push (cons 'gnus-binary-mode gnus-binary-mode-map) | |
172 | minor-mode-map-alist)) | |
173 | (run-hooks 'gnus-binary-mode-hook)))) | |
174 | ||
175 | (defun gnus-binary-display-article (article &optional all-header) | |
176 | "Run ARTICLE through the binary decode functions." | |
177 | (when (gnus-summary-goto-subject article) | |
178 | (let ((gnus-view-pseudos 'automatic)) | |
179 | (gnus-uu-decode-uu)))) | |
180 | ||
181 | (defun gnus-binary-show-article (&optional arg) | |
182 | "Bypass the binary functions and show the article." | |
183 | (interactive "P") | |
184 | (let (gnus-summary-display-article-function) | |
185 | (gnus-summary-show-article arg))) | |
186 | ||
187 | ;;; | |
188 | ;;; gnus-tree-mode | |
189 | ;;; | |
190 | ||
191 | (defvar gnus-tree-line-format "%(%[%3,3n%]%)" | |
192 | "Format of tree elements.") | |
193 | ||
194 | (defvar gnus-tree-minimize-window t | |
195 | "If non-nil, minimize the tree buffer window. | |
196 | If a number, never let the tree buffer grow taller than that number of | |
197 | lines.") | |
198 | ||
199 | (defvar gnus-selected-tree-face 'modeline | |
200 | "*Face used for highlighting selected articles in the thread tree.") | |
201 | ||
202 | (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\)) | |
203 | (?\{ . ?\}) (?< . ?>)) | |
204 | "Brackets used in tree nodes.") | |
205 | ||
206 | (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|) | |
207 | "Charaters used to connect parents with children.") | |
208 | ||
209 | (defvar gnus-tree-mode-line-format "Gnus: %%b %S %Z" | |
210 | "*The format specification for the tree mode line.") | |
211 | ||
212 | (defvar gnus-generate-tree-function 'gnus-generate-vertical-tree | |
213 | "*Function for generating a thread tree. | |
214 | Two predefined functions are available: | |
215 | `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'.") | |
216 | ||
217 | (defvar gnus-tree-mode-hook nil | |
218 | "*Hook run in tree mode buffers.") | |
219 | ||
220 | ;;; Internal variables. | |
221 | ||
222 | (defvar gnus-tree-line-format-alist | |
223 | `((?n gnus-tmp-name ?s) | |
224 | (?f gnus-tmp-from ?s) | |
225 | (?N gnus-tmp-number ?d) | |
226 | (?\[ gnus-tmp-open-bracket ?c) | |
227 | (?\] gnus-tmp-close-bracket ?c) | |
228 | (?s gnus-tmp-subject ?s))) | |
229 | ||
230 | (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist) | |
231 | ||
232 | (defvar gnus-tree-mode-line-format-spec nil) | |
233 | (defvar gnus-tree-line-format-spec nil) | |
234 | ||
235 | (defvar gnus-tree-node-length nil) | |
236 | (defvar gnus-selected-tree-overlay nil) | |
237 | ||
238 | (defvar gnus-tree-displayed-thread nil) | |
239 | ||
240 | (defvar gnus-tree-mode-map nil) | |
241 | (put 'gnus-tree-mode 'mode-class 'special) | |
242 | ||
243 | (unless gnus-tree-mode-map | |
244 | (setq gnus-tree-mode-map (make-keymap)) | |
245 | (suppress-keymap gnus-tree-mode-map) | |
246 | (gnus-define-keys | |
247 | gnus-tree-mode-map | |
248 | "\r" gnus-tree-select-article | |
249 | gnus-mouse-2 gnus-tree-pick-article | |
250 | "\C-?" gnus-tree-read-summary-keys | |
251 | ||
252 | "\C-c\C-i" gnus-info-find-node) | |
253 | ||
254 | (substitute-key-definition | |
255 | 'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map)) | |
256 | ||
257 | (defun gnus-tree-make-menu-bar () | |
258 | (unless (boundp 'gnus-tree-menu) | |
259 | (easy-menu-define | |
260 | gnus-tree-menu gnus-tree-mode-map "" | |
261 | '("Tree" | |
262 | ["Select article" gnus-tree-select-article t])))) | |
263 | ||
264 | (defun gnus-tree-mode () | |
265 | "Major mode for displaying thread trees." | |
266 | (interactive) | |
267 | (setq gnus-tree-mode-line-format-spec | |
268 | (gnus-parse-format gnus-tree-mode-line-format | |
269 | gnus-summary-mode-line-format-alist)) | |
270 | (setq gnus-tree-line-format-spec | |
271 | (gnus-parse-format gnus-tree-line-format | |
272 | gnus-tree-line-format-alist t)) | |
273 | (when (and menu-bar-mode | |
274 | (gnus-visual-p 'tree-menu 'menu)) | |
275 | (gnus-tree-make-menu-bar)) | |
276 | (kill-all-local-variables) | |
277 | (gnus-simplify-mode-line) | |
278 | (setq mode-name "Tree") | |
279 | (setq major-mode 'gnus-tree-mode) | |
280 | (use-local-map gnus-tree-mode-map) | |
281 | (buffer-disable-undo (current-buffer)) | |
282 | (setq buffer-read-only t) | |
283 | (setq truncate-lines t) | |
284 | (save-excursion | |
285 | (gnus-set-work-buffer) | |
286 | (gnus-tree-node-insert (make-mail-header "") nil) | |
287 | (setq gnus-tree-node-length (1- (point)))) | |
288 | (run-hooks 'gnus-tree-mode-hook)) | |
289 | ||
290 | (defun gnus-tree-read-summary-keys (&optional arg) | |
291 | "Read a summary buffer key sequence and execute it." | |
292 | (interactive "P") | |
293 | (let ((buf (current-buffer)) | |
294 | win) | |
295 | (gnus-article-read-summary-keys arg nil t) | |
296 | (when (setq win (get-buffer-window buf)) | |
297 | (select-window win) | |
298 | (when gnus-selected-tree-overlay | |
299 | (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1))) | |
300 | (gnus-tree-minimize)))) | |
301 | ||
302 | (defun gnus-tree-select-article (article) | |
303 | "Select the article under point, if any." | |
304 | (interactive (list (gnus-tree-article-number))) | |
305 | (let ((buf (current-buffer))) | |
306 | (when article | |
307 | (save-excursion | |
308 | (set-buffer gnus-summary-buffer) | |
309 | (gnus-summary-goto-article article)) | |
310 | (select-window (get-buffer-window buf))))) | |
311 | ||
312 | (defun gnus-tree-pick-article (e) | |
313 | "Select the article under the mouse pointer." | |
314 | (interactive "e") | |
315 | (mouse-set-point e) | |
316 | (gnus-tree-select-article (gnus-tree-article-number))) | |
317 | ||
318 | (defun gnus-tree-article-number () | |
319 | (get-text-property (point) 'gnus-number)) | |
320 | ||
321 | (defun gnus-tree-article-region (article) | |
322 | "Return a cons with BEG and END of the article region." | |
323 | (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article))) | |
324 | (when pos | |
325 | (cons pos (next-single-property-change pos 'gnus-number))))) | |
326 | ||
327 | (defun gnus-tree-goto-article (article) | |
328 | (let ((pos (text-property-any (point-min) (point-max) 'gnus-number article))) | |
329 | (when pos | |
330 | (goto-char pos)))) | |
331 | ||
332 | (defun gnus-tree-recenter () | |
333 | "Center point in the tree window." | |
334 | (let ((selected (selected-window)) | |
335 | (tree-window (get-buffer-window gnus-tree-buffer t))) | |
336 | (when tree-window | |
337 | (select-window tree-window) | |
338 | (when gnus-selected-tree-overlay | |
339 | (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1))) | |
340 | (let* ((top (cond ((< (window-height) 4) 0) | |
341 | ((< (window-height) 7) 1) | |
342 | (t 2))) | |
343 | (height (1- (window-height))) | |
344 | (bottom (save-excursion (goto-char (point-max)) | |
345 | (forward-line (- height)) | |
346 | (point)))) | |
347 | ;; Set the window start to either `bottom', which is the biggest | |
348 | ;; possible valid number, or the second line from the top, | |
349 | ;; whichever is the least. | |
350 | (set-window-start | |
351 | tree-window (min bottom (save-excursion | |
352 | (forward-line (- top)) (point))))) | |
353 | (select-window selected)))) | |
354 | ||
355 | (defun gnus-get-tree-buffer () | |
356 | "Return the tree buffer properly initialized." | |
357 | (save-excursion | |
358 | (set-buffer (get-buffer-create gnus-tree-buffer)) | |
359 | (unless (eq major-mode 'gnus-tree-mode) | |
360 | (gnus-add-current-to-buffer-list) | |
361 | (gnus-tree-mode)) | |
362 | (current-buffer))) | |
363 | ||
364 | (defun gnus-tree-minimize () | |
365 | (when (and gnus-tree-minimize-window | |
366 | (not (one-window-p))) | |
367 | (let ((windows 0) | |
368 | tot-win-height) | |
369 | (walk-windows (lambda (window) (incf windows))) | |
370 | (setq tot-win-height | |
371 | (- (frame-height) | |
372 | (* window-min-height (1- windows)) | |
373 | 2)) | |
374 | (let* ((window-min-height 2) | |
375 | (height (count-lines (point-min) (point-max))) | |
376 | (min (max (1- window-min-height) height)) | |
377 | (tot (if (numberp gnus-tree-minimize-window) | |
378 | (min gnus-tree-minimize-window min) | |
379 | min)) | |
380 | (win (get-buffer-window (current-buffer))) | |
381 | (wh (and win (1- (window-height win))))) | |
382 | (setq tot (min tot tot-win-height)) | |
383 | (when (and win | |
384 | (not (eq tot wh))) | |
385 | (let ((selected (selected-window))) | |
386 | (select-window win) | |
387 | (enlarge-window (- tot wh)) | |
388 | (select-window selected))))))) | |
389 | ||
390 | ;;; Generating the tree. | |
391 | ||
392 | (defun gnus-tree-node-insert (header sparse &optional adopted) | |
393 | (let* ((dummy (stringp header)) | |
394 | (header (if (vectorp header) header | |
395 | (progn | |
396 | (setq header (make-mail-header "*****")) | |
397 | (mail-header-set-number header 0) | |
398 | (mail-header-set-lines header 0) | |
399 | (mail-header-set-chars header 0) | |
400 | header))) | |
401 | (gnus-tmp-from (mail-header-from header)) | |
402 | (gnus-tmp-subject (mail-header-subject header)) | |
403 | (gnus-tmp-number (mail-header-number header)) | |
404 | (gnus-tmp-name | |
405 | (cond | |
406 | ((string-match "(.+)" gnus-tmp-from) | |
407 | (substring gnus-tmp-from | |
408 | (1+ (match-beginning 0)) (1- (match-end 0)))) | |
409 | ((string-match "<[^>]+> *$" gnus-tmp-from) | |
410 | (let ((beg (match-beginning 0))) | |
411 | (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from) | |
412 | (substring gnus-tmp-from (1+ (match-beginning 0)) | |
413 | (1- (match-end 0)))) | |
414 | (substring gnus-tmp-from 0 beg)))) | |
415 | ((memq gnus-tmp-number sparse) | |
416 | "***") | |
417 | (t gnus-tmp-from))) | |
418 | (gnus-tmp-open-bracket | |
419 | (cond ((memq gnus-tmp-number sparse) | |
420 | (caadr gnus-tree-brackets)) | |
421 | (dummy (caaddr gnus-tree-brackets)) | |
422 | (adopted (car (nth 3 gnus-tree-brackets))) | |
423 | (t (caar gnus-tree-brackets)))) | |
424 | (gnus-tmp-close-bracket | |
425 | (cond ((memq gnus-tmp-number sparse) | |
426 | (cdadr gnus-tree-brackets)) | |
427 | (adopted (cdr (nth 3 gnus-tree-brackets))) | |
428 | (dummy | |
429 | (cdaddr gnus-tree-brackets)) | |
430 | (t (cdar gnus-tree-brackets)))) | |
431 | (buffer-read-only nil) | |
432 | beg end) | |
433 | (gnus-add-text-properties | |
434 | (setq beg (point)) | |
435 | (setq end (progn (eval gnus-tree-line-format-spec) (point))) | |
436 | (list 'gnus-number gnus-tmp-number)) | |
437 | (when (or t (gnus-visual-p 'tree-highlight 'highlight)) | |
438 | (gnus-tree-highlight-node gnus-tmp-number beg end)))) | |
439 | ||
440 | (defun gnus-tree-highlight-node (article beg end) | |
441 | "Highlight current line according to `gnus-summary-highlight'." | |
442 | (let ((list gnus-summary-highlight) | |
443 | face) | |
444 | (save-excursion | |
445 | (set-buffer gnus-summary-buffer) | |
446 | (let* ((score (or (cdr (assq article gnus-newsgroup-scored)) | |
447 | gnus-summary-default-score 0)) | |
448 | (default gnus-summary-default-score) | |
449 | (mark (or (gnus-summary-article-mark article) gnus-unread-mark))) | |
450 | ;; Eval the cars of the lists until we find a match. | |
451 | (while (and list | |
452 | (not (eval (caar list)))) | |
453 | (setq list (cdr list))))) | |
454 | (unless (eq (setq face (cdar list)) (get-text-property beg 'face)) | |
455 | (gnus-put-text-property | |
456 | beg end 'face | |
457 | (if (boundp face) (symbol-value face) face))))) | |
458 | ||
459 | (defun gnus-tree-indent (level) | |
460 | (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? ))) | |
461 | ||
462 | (defvar gnus-tmp-limit) | |
463 | (defvar gnus-tmp-sparse) | |
464 | (defvar gnus-tmp-indent) | |
465 | ||
466 | (defun gnus-generate-tree (thread) | |
467 | "Generate a thread tree for THREAD." | |
468 | (save-excursion | |
469 | (set-buffer (gnus-get-tree-buffer)) | |
470 | (let ((buffer-read-only nil) | |
471 | (gnus-tmp-indent 0)) | |
472 | (erase-buffer) | |
473 | (funcall gnus-generate-tree-function thread 0) | |
474 | (gnus-set-mode-line 'tree) | |
475 | (goto-char (point-min)) | |
476 | (gnus-tree-minimize) | |
477 | (gnus-tree-recenter) | |
478 | (let ((selected (selected-window))) | |
479 | (when (get-buffer-window (set-buffer gnus-tree-buffer) t) | |
480 | (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t)) | |
481 | (gnus-horizontal-recenter) | |
482 | (select-window selected)))))) | |
483 | ||
484 | (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted) | |
485 | "Generate a horizontal tree." | |
486 | (let* ((dummy (stringp (car thread))) | |
487 | (do (or dummy | |
488 | (memq (mail-header-number (car thread)) gnus-tmp-limit))) | |
489 | col beg) | |
490 | (if (not do) | |
491 | ;; We don't want this article. | |
492 | (setq thread (cdr thread)) | |
493 | (if (not (bolp)) | |
494 | ;; Not the first article on the line, so we insert a "-". | |
495 | (insert (car gnus-tree-parent-child-edges)) | |
496 | ;; If the level isn't zero, then we insert some indentation. | |
497 | (unless (zerop level) | |
498 | (gnus-tree-indent level) | |
499 | (insert (cadr gnus-tree-parent-child-edges)) | |
500 | (setq col (- (setq beg (point)) (gnus-point-at-bol) 1)) | |
501 | ;; Draw "|" lines upwards. | |
502 | (while (progn | |
503 | (forward-line -1) | |
504 | (forward-char col) | |
505 | (= (following-char) ? )) | |
506 | (delete-char 1) | |
507 | (insert (caddr gnus-tree-parent-child-edges))) | |
508 | (goto-char beg))) | |
509 | (setq dummyp nil) | |
510 | ;; Insert the article node. | |
511 | (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)) | |
512 | (if (null thread) | |
513 | ;; End of the thread, so we go to the next line. | |
514 | (unless (bolp) | |
515 | (insert "\n")) | |
516 | ;; Recurse downwards in all children of this article. | |
517 | (while thread | |
518 | (gnus-generate-horizontal-tree | |
519 | (pop thread) (if do (1+ level) level) | |
520 | (or dummyp dummy) dummy))))) | |
521 | ||
522 | (defsubst gnus-tree-indent-vertical () | |
523 | (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent) | |
524 | (- (point) (gnus-point-at-bol))))) | |
525 | (when (> len 0) | |
526 | (insert (make-string len ? ))))) | |
527 | ||
528 | (defsubst gnus-tree-forward-line (n) | |
529 | (while (>= (decf n) 0) | |
530 | (unless (zerop (forward-line 1)) | |
531 | (end-of-line) | |
532 | (insert "\n"))) | |
533 | (end-of-line)) | |
534 | ||
535 | (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted) | |
536 | "Generate a vertical tree." | |
537 | (let* ((dummy (stringp (car thread))) | |
538 | (do (or dummy | |
539 | (memq (mail-header-number (car thread)) gnus-tmp-limit))) | |
540 | beg) | |
541 | (if (not do) | |
542 | ;; We don't want this article. | |
543 | (setq thread (cdr thread)) | |
544 | (if (not (save-excursion (beginning-of-line) (bobp))) | |
545 | ;; Not the first article on the line, so we insert a "-". | |
546 | (progn | |
547 | (gnus-tree-indent-vertical) | |
548 | (insert (make-string (/ gnus-tree-node-length 2) ? )) | |
549 | (insert (caddr gnus-tree-parent-child-edges)) | |
550 | (gnus-tree-forward-line 1)) | |
551 | ;; If the level isn't zero, then we insert some indentation. | |
552 | (unless (zerop gnus-tmp-indent) | |
553 | (gnus-tree-forward-line (1- (* 2 level))) | |
554 | (gnus-tree-indent-vertical) | |
555 | (delete-char -1) | |
556 | (insert (cadr gnus-tree-parent-child-edges)) | |
557 | (setq beg (point)) | |
558 | ;; Draw "-" lines leftwards. | |
559 | (while (progn | |
560 | (forward-char -2) | |
561 | (= (following-char) ? )) | |
562 | (delete-char 1) | |
563 | (insert (car gnus-tree-parent-child-edges))) | |
564 | (goto-char beg) | |
565 | (gnus-tree-forward-line 1))) | |
566 | (setq dummyp nil) | |
567 | ;; Insert the article node. | |
568 | (gnus-tree-indent-vertical) | |
569 | (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted) | |
570 | (gnus-tree-forward-line 1)) | |
571 | (if (null thread) | |
572 | ;; End of the thread, so we go to the next line. | |
573 | (progn | |
574 | (goto-char (point-min)) | |
575 | (end-of-line) | |
576 | (incf gnus-tmp-indent)) | |
577 | ;; Recurse downwards in all children of this article. | |
578 | (while thread | |
579 | (gnus-generate-vertical-tree | |
580 | (pop thread) (if do (1+ level) level) | |
581 | (or dummyp dummy) dummy))))) | |
582 | ||
583 | ;;; Interface functions. | |
584 | ||
585 | (defun gnus-possibly-generate-tree (article &optional force) | |
586 | "Generate the thread tree for ARTICLE if it isn't displayed already." | |
587 | (when (save-excursion | |
588 | (set-buffer gnus-summary-buffer) | |
589 | (and gnus-use-trees | |
590 | (vectorp (gnus-summary-article-header article)))) | |
591 | (save-excursion | |
592 | (let ((top (save-excursion | |
593 | (set-buffer gnus-summary-buffer) | |
594 | (gnus-cut-thread | |
595 | (gnus-remove-thread | |
596 | (mail-header-id | |
597 | (gnus-summary-article-header article)) t)))) | |
598 | (gnus-tmp-limit gnus-newsgroup-limit) | |
599 | (gnus-tmp-sparse gnus-newsgroup-sparse)) | |
600 | (when (or force | |
601 | (not (eq top gnus-tree-displayed-thread))) | |
602 | (gnus-generate-tree top) | |
603 | (setq gnus-tree-displayed-thread top)))))) | |
604 | ||
605 | (defun gnus-tree-open (group) | |
606 | (gnus-get-tree-buffer)) | |
607 | ||
608 | (defun gnus-tree-close (group) | |
609 | ;(gnus-kill-buffer gnus-tree-buffer) | |
610 | ) | |
611 | ||
612 | (defun gnus-highlight-selected-tree (article) | |
613 | "Highlight the selected article in the tree." | |
614 | (let ((buf (current-buffer)) | |
615 | region) | |
616 | (set-buffer gnus-tree-buffer) | |
617 | (when (setq region (gnus-tree-article-region article)) | |
618 | (when (or (not gnus-selected-tree-overlay) | |
619 | (gnus-extent-detached-p gnus-selected-tree-overlay)) | |
620 | ;; Create a new overlay. | |
621 | (gnus-overlay-put | |
622 | (setq gnus-selected-tree-overlay (gnus-make-overlay 1 2)) | |
623 | 'face gnus-selected-tree-face)) | |
624 | ;; Move the overlay to the article. | |
625 | (gnus-move-overlay | |
626 | gnus-selected-tree-overlay (goto-char (car region)) (cdr region)) | |
627 | (gnus-tree-minimize) | |
628 | (gnus-tree-recenter) | |
629 | (let ((selected (selected-window))) | |
630 | (when (get-buffer-window (set-buffer gnus-tree-buffer) t) | |
631 | (select-window (get-buffer-window (set-buffer gnus-tree-buffer) t)) | |
632 | (gnus-horizontal-recenter) | |
633 | (select-window selected)))) | |
634 | ;; If we remove this save-excursion, it updates the wrong mode lines?!? | |
635 | (save-excursion | |
636 | (set-buffer gnus-tree-buffer) | |
637 | (gnus-set-mode-line 'tree)) | |
638 | (set-buffer buf))) | |
639 | ||
640 | (defun gnus-tree-highlight-article (article face) | |
641 | (save-excursion | |
642 | (set-buffer (gnus-get-tree-buffer)) | |
643 | (let (region) | |
644 | (when (setq region (gnus-tree-article-region article)) | |
645 | (gnus-put-text-property (car region) (cdr region) 'face face) | |
646 | (set-window-point | |
647 | (get-buffer-window (current-buffer) t) (cdr region)))))) | |
648 | ||
649 | ;;; Allow redefinition of functions. | |
650 | (gnus-ems-redefine) | |
651 | ||
652 | (provide 'gnus-salt) | |
653 | ||
654 | ;;; gnus-salt.el ends here |