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1 | ;;; mh-limit.el --- MH-E display limits |
2 | ||
5df4f04c | 3 | ;; Copyright (C) 2001, 2002, 2003, 2006, 2007, 2008, 2009, 2010, 2011 |
dcf71371 | 4 | ;; Free Software Foundation, Inc. |
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5 | |
6 | ;; Author: Peter S. Galbraith <psg@debian.org> | |
7 | ;; Maintainer: Bill Wohler <wohler@newt.com> | |
8 | ;; Keywords: mail | |
9 | ;; See: mh-e.el | |
10 | ||
11 | ;; This file is part of GNU Emacs. | |
12 | ||
5e809f55 | 13 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
dda00b2c | 14 | ;; it under the terms of the GNU General Public License as published by |
5e809f55 GM |
15 | ;; the Free Software Foundation, either version 3 of the License, or |
16 | ;; (at your option) any later version. | |
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17 | |
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
5e809f55 | 24 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
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25 | |
26 | ;;; Commentary: | |
27 | ||
28 | ;; "Poor man's threading" by psg. | |
29 | ||
30 | ;;; Change Log: | |
31 | ||
32 | ;;; Code: | |
33 | ||
34 | (require 'mh-e) | |
35 | (mh-require-cl) | |
36 | (require 'mh-scan) | |
37 | ||
38 | (autoload 'message-fetch-field "message") | |
39 | ||
40 | \f | |
41 | ||
42 | ;;; MH-Folder Commands | |
43 | ||
44 | ;; Alphabetical. | |
45 | ||
46 | ;;;###mh-autoload | |
47 | (defun mh-delete-subject () | |
48 | "Delete messages with same subject\\<mh-folder-mode-map>. | |
49 | ||
50 | To delete messages faster, you can use this command to delete all | |
51 | the messages with the same subject as the current message. This | |
52 | command puts these messages in a sequence named \"subject\". You | |
53 | can undo this action by using \\[mh-undo] with a prefix argument | |
54 | and then specifying the \"subject\" sequence." | |
55 | (interactive) | |
56 | (let ((count (mh-subject-to-sequence nil))) | |
57 | (cond | |
58 | ((not count) ; No subject line, delete msg anyway | |
59 | (mh-delete-msg (mh-get-msg-num t))) | |
60 | ((= 0 count) ; No other msgs, delete msg anyway. | |
61 | (message "No other messages with same Subject following this one") | |
62 | (mh-delete-msg (mh-get-msg-num t))) | |
63 | (t ; We have a subject sequence. | |
64 | (message "Marked %d messages for deletion" count) | |
65 | (mh-delete-msg 'subject))))) | |
66 | ||
67 | ;;;###mh-autoload | |
68 | (defun mh-delete-subject-or-thread () | |
69 | "Delete messages with same subject or thread\\<mh-folder-mode-map>. | |
70 | ||
71 | To delete messages faster, you can use this command to delete all | |
72 | the messages with the same subject as the current message. This | |
73 | command puts these messages in a sequence named \"subject\". You | |
74 | can undo this action by using \\[mh-undo] with a prefix argument | |
75 | and then specifying the \"subject\" sequence. | |
76 | ||
77 | However, if the buffer is displaying a threaded view of the | |
78 | folder then this command behaves like \\[mh-thread-delete]." | |
79 | (interactive) | |
80 | (if (memq 'unthread mh-view-ops) | |
81 | (mh-thread-delete) | |
82 | (mh-delete-subject))) | |
83 | ||
84 | ;;;###mh-autoload | |
85 | (defun mh-narrow-to-cc (&optional pick-expr) | |
86 | "Limit to messages with the same \"Cc:\" field. | |
87 | With a prefix argument, edit PICK-EXPR. | |
88 | ||
89 | Use \\<mh-folder-mode-map>\\[mh-widen] to undo this command." | |
90 | (interactive | |
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91 | (list (mh-edit-pick-expr |
92 | (mh-quote-pick-expr (mh-current-message-header-field 'cc))))) | |
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93 | (mh-narrow-to-header-field 'cc pick-expr)) |
94 | ||
95 | ;;;###mh-autoload | |
96 | (defun mh-narrow-to-from (&optional pick-expr) | |
97 | "Limit to messages with the same \"From:\" field. | |
98 | With a prefix argument, edit PICK-EXPR. | |
99 | ||
100 | Use \\<mh-folder-mode-map>\\[mh-widen] to undo this command." | |
101 | (interactive | |
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102 | (list (mh-edit-pick-expr |
103 | (mh-quote-pick-expr (mh-current-message-header-field 'from))))) | |
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104 | (mh-narrow-to-header-field 'from pick-expr)) |
105 | ||
106 | ;;;###mh-autoload | |
107 | (defun mh-narrow-to-range (range) | |
108 | "Limit to RANGE. | |
109 | ||
110 | Check the documentation of `mh-interactive-range' to see how | |
111 | RANGE is read in interactive use. | |
112 | ||
113 | Use \\<mh-folder-mode-map>\\[mh-widen] to undo this command." | |
114 | (interactive (list (mh-interactive-range "Narrow to"))) | |
115 | (when (assoc 'range mh-seq-list) (mh-delete-seq 'range)) | |
116 | (mh-add-msgs-to-seq (mh-range-to-msg-list range) 'range) | |
117 | (mh-narrow-to-seq 'range)) | |
118 | ||
119 | ;;;###mh-autoload | |
120 | (defun mh-narrow-to-subject (&optional pick-expr) | |
121 | "Limit to messages with same subject. | |
122 | With a prefix argument, edit PICK-EXPR. | |
66b265f5 | 123 | The string Re: is removed from the search. |
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124 | |
125 | Use \\<mh-folder-mode-map>\\[mh-widen] to undo this command." | |
126 | (interactive | |
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127 | (list (mh-edit-pick-expr |
128 | (mh-quote-pick-expr (mh-current-message-header-field 'subject))))) | |
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129 | (setq pick-expr |
130 | (let ((case-fold-search t)) | |
131 | (loop for s in pick-expr | |
132 | collect (mh-replace-regexp-in-string "re: *" "" s)))) | |
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133 | (mh-narrow-to-header-field 'subject pick-expr)) |
134 | ||
135 | ;;;###mh-autoload | |
136 | (defun mh-narrow-to-to (&optional pick-expr) | |
137 | "Limit to messages with the same \"To:\" field. | |
138 | With a prefix argument, edit PICK-EXPR. | |
139 | ||
140 | Use \\<mh-folder-mode-map>\\[mh-widen] to undo this command." | |
141 | (interactive | |
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142 | (list (mh-edit-pick-expr |
143 | (mh-quote-pick-expr (mh-current-message-header-field 'to))))) | |
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144 | (mh-narrow-to-header-field 'to pick-expr)) |
145 | ||
146 | \f | |
147 | ||
148 | ;;; Support Routines | |
149 | ||
150 | (defun mh-subject-to-sequence (all) | |
151 | "Put all following messages with same subject in sequence 'subject. | |
152 | If arg ALL is t, move to beginning of folder buffer to collect all | |
153 | messages. | |
154 | If arg ALL is nil, collect only messages fron current one on forward. | |
155 | ||
156 | Return number of messages put in the sequence: | |
157 | ||
158 | nil -> there was no subject line. | |
159 | ||
160 | 0 -> there were no later messages with the same | |
161 | subject (sequence not made) | |
162 | ||
163 | >1 -> the total number of messages including current one." | |
164 | (if (memq 'unthread mh-view-ops) | |
165 | (mh-subject-to-sequence-threaded all) | |
166 | (mh-subject-to-sequence-unthreaded all))) | |
167 | ||
168 | (defun mh-subject-to-sequence-threaded (all) | |
169 | "Put all messages with the same subject in the 'subject sequence. | |
170 | ||
171 | This function works when the folder is threaded. In this | |
172 | situation the subject could get truncated and so the normal | |
173 | matching doesn't work. | |
174 | ||
175 | The parameter ALL is non-nil then all the messages in the buffer | |
176 | are considered, otherwise only the messages after the current one | |
177 | are taken into account." | |
178 | (let* ((cur (mh-get-msg-num nil)) | |
179 | (subject (mh-thread-find-msg-subject cur)) | |
180 | region msgs) | |
181 | (if (null subject) | |
182 | (and (message "No subject line") nil) | |
183 | (setq region (cons (if all (point-min) (point)) (point-max))) | |
184 | (mh-iterate-on-range msg region | |
185 | (when (eq (mh-thread-find-msg-subject msg) subject) | |
186 | (push msg msgs))) | |
187 | (setq msgs (sort msgs #'mh-lessp)) | |
188 | (if (null msgs) | |
189 | 0 | |
190 | (when (assoc 'subject mh-seq-list) | |
191 | (mh-delete-seq 'subject)) | |
192 | (mh-add-msgs-to-seq msgs 'subject) | |
193 | (length msgs))))) | |
194 | ||
195 | (defvar mh-limit-max-subject-size 41 | |
196 | "Maximum size of the subject part. | |
197 | It would be desirable to avoid hard-coding this.") | |
198 | ||
199 | (defun mh-subject-to-sequence-unthreaded (all) | |
200 | "Put all following messages with same subject in sequence 'subject. | |
201 | ||
202 | This function only works with an unthreaded folder. If arg ALL is | |
203 | t, move to beginning of folder buffer to collect all messages. If | |
204 | arg ALL is nil, collect only messages fron current one on | |
205 | forward. | |
206 | ||
207 | Return number of messages put in the sequence: | |
208 | ||
209 | nil -> there was no subject line. | |
210 | 0 -> there were no later messages with the same | |
211 | subject (sequence not made) | |
212 | >1 -> the total number of messages including current one." | |
213 | (if (not (eq major-mode 'mh-folder-mode)) | |
214 | (error "Not in a folder buffer")) | |
215 | (save-excursion | |
216 | (beginning-of-line) | |
217 | (if (or (not (looking-at mh-scan-subject-regexp)) | |
218 | (not (match-string 3)) | |
219 | (string-equal "" (match-string 3))) | |
220 | (progn (message "No subject line") | |
221 | nil) | |
d5dc8c56 | 222 | (let ((subject (mh-match-string-no-properties 3)) |
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223 | (list)) |
224 | (if (> (length subject) mh-limit-max-subject-size) | |
225 | (setq subject (substring subject 0 mh-limit-max-subject-size))) | |
226 | (save-excursion | |
227 | (if all | |
228 | (goto-char (point-min))) | |
229 | (while (re-search-forward mh-scan-subject-regexp nil t) | |
d5dc8c56 | 230 | (let ((this-subject (mh-match-string-no-properties 3))) |
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231 | (if (> (length this-subject) mh-limit-max-subject-size) |
232 | (setq this-subject (substring this-subject | |
233 | 0 mh-limit-max-subject-size))) | |
234 | (if (string-equal this-subject subject) | |
235 | (setq list (cons (mh-get-msg-num t) list)))))) | |
236 | (cond | |
237 | (list | |
238 | ;; If we created a new sequence, add the initial message to it too. | |
239 | (if (not (member (mh-get-msg-num t) list)) | |
240 | (setq list (cons (mh-get-msg-num t) list))) | |
241 | (if (assoc 'subject mh-seq-list) (mh-delete-seq 'subject)) | |
242 | ;; sort the result into a sequence | |
243 | (let ((sorted-list (sort (copy-sequence list) 'mh-lessp))) | |
244 | (while sorted-list | |
245 | (mh-add-msgs-to-seq (car sorted-list) 'subject nil) | |
246 | (setq sorted-list (cdr sorted-list))) | |
247 | (safe-length list))) | |
248 | (t | |
249 | 0)))))) | |
250 | ||
251 | (defun mh-edit-pick-expr (default) | |
252 | "With prefix arg edit a pick expression. | |
253 | If no prefix arg is given, then return DEFAULT." | |
254 | (let ((default-string (loop for x in default concat (format " %s" x)))) | |
255 | (if (or current-prefix-arg (equal default-string "")) | |
256 | (mh-pick-args-list (read-string "Pick expression: " | |
257 | default-string)) | |
258 | default))) | |
259 | ||
260 | (defun mh-pick-args-list (s) | |
261 | "Form list by grouping elements in string S suitable for pick arguments. | |
262 | For example, the string \"-subject a b c -from Joe User | |
263 | <user@domain.com>\" is converted to (\"-subject\" \"a b c\" | |
264 | \"-from\" \"Joe User <user@domain.com>\"" | |
265 | (let ((full-list (split-string s)) | |
266 | current-arg collection arg-list) | |
267 | (while full-list | |
268 | (setq current-arg (car full-list)) | |
269 | (if (null (string-match "^-" current-arg)) | |
270 | (setq collection | |
271 | (if (null collection) | |
272 | current-arg | |
273 | (format "%s %s" collection current-arg))) | |
274 | (when collection | |
275 | (setq arg-list (append arg-list (list collection))) | |
276 | (setq collection nil)) | |
277 | (setq arg-list (append arg-list (list current-arg)))) | |
278 | (setq full-list (cdr full-list))) | |
279 | (when collection | |
280 | (setq arg-list (append arg-list (list collection)))) | |
281 | arg-list)) | |
282 | ||
283 | (defun mh-current-message-header-field (header-field) | |
284 | "Return a pick regexp to match HEADER-FIELD of the message at point." | |
285 | (let ((num (mh-get-msg-num nil))) | |
286 | (when num | |
287 | (let ((folder mh-current-folder)) | |
288 | (with-temp-buffer | |
289 | (insert-file-contents-literally (mh-msg-filename num folder)) | |
290 | (goto-char (point-min)) | |
291 | (when (search-forward "\n\n" nil t) | |
292 | (narrow-to-region (point-min) (point))) | |
293 | (let* ((field (or (message-fetch-field (format "%s" header-field)) | |
294 | "")) | |
295 | (field-option (format "-%s" header-field)) | |
296 | (patterns (loop for x in (split-string field "[ ]*,[ ]*") | |
297 | unless (equal x "") | |
298 | collect (if (string-match "<\\(.*@.*\\)>" x) | |
299 | (match-string 1 x) | |
300 | x)))) | |
301 | (when patterns | |
302 | (loop with accum = `(,field-option ,(car patterns)) | |
303 | for e in (cdr patterns) | |
304 | do (setq accum `(,field-option ,e "-or" ,@accum)) | |
305 | finally return accum)))))))) | |
306 | ||
307 | (defun mh-narrow-to-header-field (header-field pick-expr) | |
308 | "Limit to messages whose HEADER-FIELD match PICK-EXPR. | |
309 | The MH command pick is used to do the match." | |
310 | (let ((folder mh-current-folder) | |
311 | (original (mh-coalesce-msg-list | |
312 | (mh-range-to-msg-list (cons (point-min) (point-max))))) | |
313 | (msg-list ())) | |
314 | (with-temp-buffer | |
315 | (apply #'mh-exec-cmd-output "pick" nil folder | |
316 | (append original (list "-list") pick-expr)) | |
317 | (goto-char (point-min)) | |
318 | (while (not (eobp)) | |
319 | (let ((num (ignore-errors | |
320 | (string-to-number | |
d5dc8c56 | 321 | (buffer-substring (point) (mh-line-end-position)))))) |
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322 | (when num (push num msg-list)) |
323 | (forward-line)))) | |
324 | (if (null msg-list) | |
325 | (message "No matches") | |
326 | (when (assoc 'header mh-seq-list) (mh-delete-seq 'header)) | |
327 | (mh-add-msgs-to-seq msg-list 'header) | |
328 | (mh-narrow-to-seq 'header)))) | |
329 | ||
330 | (provide 'mh-limit) | |
331 | ||
332 | ;; Local Variables: | |
333 | ;; indent-tabs-mode: nil | |
334 | ;; sentence-end-double-space: nil | |
335 | ;; End: | |
336 | ||
a1ab640d | 337 | ;; arch-tag: b0d24378-1234-4c42-aa3f-7abad25b40a1 |
dda00b2c | 338 | ;;; mh-limit.el ends here |