1 ;;; notmuch-address.el --- address completion with notmuch
3 ;; Copyright © David Edmondson
5 ;; This file is part of Notmuch.
7 ;; Notmuch is free software: you can redistribute it and/or modify it
8 ;; under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation, either version 3 of the License, or
10 ;; (at your option) any later version.
12 ;; Notmuch is distributed in the hope that it will be useful, but
13 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 ;; General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with Notmuch. If not, see <https://www.gnu.org/licenses/>.
20 ;; Authors: David Edmondson <dme@dme.org>
25 (require 'notmuch-parser)
26 (require 'notmuch-lib)
27 (require 'notmuch-company)
29 (declare-function company-manual-begin "company")
31 (defvar notmuch-address-last-harvest 0
32 "Time of last address harvest.")
34 (defvar notmuch-address-completions (make-hash-table :test 'equal)
35 "Hash of email addresses for completion during email composition.
36 This variable is set by calling `notmuch-address-harvest'.")
38 (defvar notmuch-address-full-harvest-finished nil
39 "t indicates that full completion address harvesting has been
40 finished. Use notmuch-address--harvest-ready to access as that
41 will load a saved hash if necessary (and available).")
43 (defun notmuch-address--harvest-ready ()
44 "Return t if there is a full address hash available.
46 If the hash is not present it attempts to load a saved hash."
47 (or notmuch-address-full-harvest-finished
48 (notmuch-address--load-address-hash)))
50 (defcustom notmuch-address-command 'internal
51 "Determines how address completion candidates are generated.
53 If it is a string then that string should be an external program
54 which must take a single argument (searched string) and output a
55 list of completion candidates, one per line.
57 Alternatively, it can be the symbol 'internal, in which case
58 internal completion is used; the variable
59 `notmuch-address-internal-completion` can be used to customize
62 Finally, if this variable is nil then address completion is
65 (const :tag "Use internal address completion" internal)
66 (const :tag "Disable address completion" nil)
67 (string :tag "Use external completion command"))
69 :group 'notmuch-address
70 :group 'notmuch-external)
72 (defcustom notmuch-address-internal-completion '(sent nil)
73 "Determines how internal address completion generates candidates.
75 This should be a list of the form '(DIRECTION FILTER), where
76 DIRECTION is either sent or received and specifies whether the
77 candidates are searched in messages sent by the user or received
78 by the user (note received by is much faster), and FILTER is
79 either nil or a filter-string, such as \"date:1y..\" to append
81 :type '(list :tag "Use internal address completion"
83 :tag "Base completion on messages you have"
85 (const :tag "sent (more accurate)" sent)
86 (const :tag "received (faster)" received))
87 (radio :tag "Filter messages used for completion"
88 (const :tag "Use all messages" nil)
89 (string :tag "Filter query")))
90 ;; We override set so that we can clear the cache when this changes
91 :set (lambda (symbol value)
92 (set-default symbol value)
93 (setq notmuch-address-last-harvest 0)
94 (setq notmuch-address-completions (clrhash notmuch-address-completions))
95 (setq notmuch-address-full-harvest-finished nil))
97 :group 'notmuch-address
98 :group 'notmuch-external)
100 (defcustom notmuch-address-save-filename nil
101 "Filename to save the cached completion addresses.
103 All the addresses notmuch uses for address completion will be
104 cached in this file. This has obvious privacy implications so you
105 should make sure it is not somewhere publicly readable."
106 :type '(choice (const :tag "Off" nil)
107 (file :tag "Filename"))
109 :group 'notmuch-address
110 :group 'notmuch-external)
112 (defcustom notmuch-address-selection-function 'notmuch-address-selection-function
113 "The function to select address from given list. The function is
114 called with PROMPT, COLLECTION, and INITIAL-INPUT as arguments
115 (subset of what `completing-read' can be called with).
116 While executed the value of `completion-ignore-case' is t.
117 See documentation of function `notmuch-address-selection-function'
118 to know how address selection is made by default."
121 :group 'notmuch-address
122 :group 'notmuch-external)
124 (defcustom notmuch-address-post-completion-functions nil
125 "Functions called after completing address.
127 The completed address is passed as an argument to each function.
128 Note that this hook will be invoked for completion in headers
129 matching `notmuch-address-completion-headers-regexp'."
131 :group 'notmuch-address
132 :group 'notmuch-hooks)
134 (defun notmuch-address-selection-function (prompt collection initial-input)
135 "Call (`completing-read'
136 PROMPT COLLECTION nil nil INITIAL-INPUT 'notmuch-address-history)"
138 prompt collection nil nil initial-input 'notmuch-address-history))
140 (defvar notmuch-address-completion-headers-regexp
141 "^\\(Resent-\\)?\\(To\\|B?Cc\\|Reply-To\\|From\\|Mail-Followup-To\\|Mail-Copies-To\\):")
143 (defvar notmuch-address-history nil)
145 (defun notmuch-address-message-insinuate ()
146 (message "calling notmuch-address-message-insinuate is no longer needed"))
148 (defcustom notmuch-address-use-company t
149 "If available, use company mode for address completion."
152 :group 'notmuch-address)
154 (defun notmuch-address-setup ()
155 (let* ((setup-company (and notmuch-address-use-company
156 (require 'company nil t)))
157 (pair (cons notmuch-address-completion-headers-regexp
158 #'notmuch-address-expand-name)))
160 (notmuch-company-setup))
161 (unless (member pair message-completion-alist)
162 (setq message-completion-alist
163 (push pair message-completion-alist)))))
165 (defun notmuch-address-toggle-internal-completion ()
166 "Toggle use of internal completion for current buffer.
168 This overrides the global setting for address completion and
169 toggles the setting in this buffer."
171 (if (local-variable-p 'notmuch-address-command)
172 (kill-local-variable 'notmuch-address-command)
173 (notmuch-setq-local notmuch-address-command 'internal))
174 (if (boundp 'company-idle-delay)
175 (if (local-variable-p 'company-idle-delay)
176 (kill-local-variable 'company-idle-delay)
177 (notmuch-setq-local company-idle-delay nil))))
179 (defun notmuch-address-matching (substring)
180 "Returns a list of completion candidates matching SUBSTRING.
181 The candidates are taken from `notmuch-address-completions'."
183 (re (regexp-quote substring)))
184 (maphash (lambda (key val)
185 (when (string-match re key)
186 (push key candidates)))
187 notmuch-address-completions)
190 (defun notmuch-address-options (original)
191 "Returns a list of completion candidates. Uses either
192 elisp-based implementation or older implementation requiring
195 ((eq notmuch-address-command 'internal)
196 (unless (notmuch-address--harvest-ready)
197 ;; First, run quick synchronous harvest based on what the user
199 (notmuch-address-harvest original t))
200 (prog1 (notmuch-address-matching original)
201 ;; Then start the (potentially long-running) full asynchronous harvest if necessary
202 (notmuch-address-harvest-trigger)))
204 (process-lines notmuch-address-command original))))
206 (defun notmuch-address-expand-name ()
208 ((and (eq notmuch-address-command 'internal)
209 notmuch-address-use-company
210 (bound-and-true-p company-mode))
211 (company-manual-begin))
212 (notmuch-address-command
215 (re-search-backward "\\(\\`\\|[\n:,]\\)[ \t]*")
216 (goto-char (match-end 0))
218 (orig (buffer-substring-no-properties beg end))
219 (completion-ignore-case t)
220 (options (with-temp-message "Looking for completion candidates..."
221 (notmuch-address-options orig)))
222 (num-options (length options))
229 (funcall notmuch-address-selection-function
230 (format "Address (%s matches): " num-options)
231 ;; We put the first match as the initial
232 ;; input; we put all the matches as
233 ;; possible completions, moving the
234 ;; first match to the end of the list
235 ;; makes cursor up/down in the list work
237 (append (cdr options) (list (car options)))
241 (push chosen notmuch-address-history)
242 (delete-region beg end)
244 (run-hook-with-args 'notmuch-address-post-completion-functions chosen))
245 (message "No matches.")
249 ;; Copied from `w3m-which-command'.
250 (defun notmuch-address-locate-command (command)
251 "Return non-nil if `command' is an executable either on
252 `exec-path' or an absolute pathname."
253 (when (stringp command)
254 (if (and (file-name-absolute-p command)
255 (file-executable-p command))
257 (setq command (file-name-nondirectory command))
258 (catch 'found-command
260 (dolist (dir exec-path)
261 (setq bin (expand-file-name command dir))
262 (when (or (and (file-executable-p bin)
263 (not (file-directory-p bin)))
264 (and (file-executable-p (setq bin (concat bin ".exe")))
265 (not (file-directory-p bin))))
266 (throw 'found-command bin))))))))
268 (defun notmuch-address-harvest-addr (result)
269 (let ((name-addr (plist-get result :name-addr)))
270 (puthash name-addr t notmuch-address-completions)))
272 (defun notmuch-address-harvest-handle-result (obj)
273 (notmuch-address-harvest-addr obj))
275 (defun notmuch-address-harvest-filter (proc string)
276 (when (buffer-live-p (process-buffer proc))
277 (with-current-buffer (process-buffer proc)
279 (goto-char (point-max))
281 (notmuch-sexp-parse-partial-list
282 'notmuch-address-harvest-handle-result (process-buffer proc)))))
284 (defvar notmuch-address-harvest-procs '(nil . nil)
285 "The currently running harvests.
287 The car is a partial harvest, and the cdr is a full harvest.")
289 (defun notmuch-address-harvest (&optional addr-prefix synchronous callback)
290 "Collect addresses completion candidates.
292 It queries the notmuch database for messages sent/received (as
293 configured with `notmuch-address-command`) by the user, collects
294 destination/source addresses from those messages and stores them
295 in `notmuch-address-completions'.
297 If ADDR-PREFIX is not nil, only messages with to/from addresses
298 matching ADDR-PREFIX*' are queried.
300 Address harvesting may take some time so the address collection runs
301 asynchronously unless SYNCHRONOUS is t. In case of asynchronous
302 execution, CALLBACK is called when harvesting finishes."
304 (let* ((sent (eq (car notmuch-address-internal-completion) 'sent))
305 (config-query (cadr notmuch-address-internal-completion))
306 (prefix-query (when addr-prefix
307 (format "%s:%s*" (if sent "to" "from") addr-prefix)))
309 (mapconcat (lambda (x)
310 (concat (if sent "from:" "to:") x))
311 (notmuch-user-emails) " or "))
312 (query (if (or prefix-query config-query)
313 (concat (format "(%s)" from-or-to-me-query)
315 (format " and (%s)" prefix-query))
317 (format " and (%s)" config-query)))
318 from-or-to-me-query))
319 (args `("address" "--format=sexp" "--format-version=4"
320 ,(if sent "--output=recipients" "--output=sender")
321 "--deduplicate=address"
324 (mapc #'notmuch-address-harvest-addr
325 (apply 'notmuch-call-notmuch-sexp args))
327 (let* ((current-proc (if addr-prefix
328 (car notmuch-address-harvest-procs)
329 (cdr notmuch-address-harvest-procs)))
330 (proc-name (format "notmuch-address-%s-harvest"
331 (if addr-prefix "partial" "full")))
332 (proc-buf (concat " *" proc-name "*")))
333 ;; Kill any existing process
335 (kill-buffer (process-buffer current-proc))) ; this also kills the process
338 (apply 'notmuch-start-notmuch proc-name proc-buf
339 callback ; process sentinel
341 (set-process-filter current-proc 'notmuch-address-harvest-filter)
342 (set-process-query-on-exit-flag current-proc nil)
344 (setcar notmuch-address-harvest-procs current-proc)
345 (setcdr notmuch-address-harvest-procs current-proc)))))
349 (defvar notmuch-address--save-hash-version 1
350 "Version format of the save hash.")
352 (defun notmuch-address--get-address-hash ()
353 "Returns the saved address hash as a plist.
355 Returns nil if the save file does not exist, or it does not seem
356 to be a saved address hash."
357 (when notmuch-address-save-filename
360 (insert-file-contents notmuch-address-save-filename)
361 (let ((name (read (current-buffer)))
362 (plist (read (current-buffer))))
363 ;; We do two simple sanity checks on the loaded file. We just
364 ;; check a version is specified, not that it is the current
365 ;; version, as we are allowed to over-write and a save-file with
367 (when (and (string= name "notmuch-address-hash")
368 (plist-get plist :version))
370 ;; The error case catches any of the reads failing.
373 (defun notmuch-address--load-address-hash ()
374 "Read the saved address hash and set the corresponding variables."
375 (let ((load-plist (notmuch-address--get-address-hash)))
376 (when (and load-plist
377 ;; If the user's setting have changed, or the version
378 ;; has changed, return nil to make sure the new settings
380 (equal (plist-get load-plist :completion-settings)
381 notmuch-address-internal-completion)
382 (equal (plist-get load-plist :version)
383 notmuch-address--save-hash-version))
384 (setq notmuch-address-last-harvest (plist-get load-plist :last-harvest)
385 notmuch-address-completions (plist-get load-plist :completions)
386 notmuch-address-full-harvest-finished t)
387 ;; Return t to say load was successful.
390 (defun notmuch-address--save-address-hash ()
391 (when notmuch-address-save-filename
392 (if (or (not (file-exists-p notmuch-address-save-filename))
393 ;; The file exists, check it is a file we saved
394 (notmuch-address--get-address-hash))
395 (with-temp-file notmuch-address-save-filename
396 (let ((save-plist (list :version notmuch-address--save-hash-version
397 :completion-settings notmuch-address-internal-completion
398 :last-harvest notmuch-address-last-harvest
399 :completions notmuch-address-completions)))
400 (print "notmuch-address-hash" (current-buffer))
401 (print save-plist (current-buffer))))
403 Warning: notmuch-address-save-filename %s exists but doesn't
404 appear to be an address savefile. Not overwriting."
405 notmuch-address-save-filename))))
407 (defun notmuch-address-harvest-trigger ()
408 (let ((now (float-time)))
409 (when (> (- now notmuch-address-last-harvest) 86400)
410 (setq notmuch-address-last-harvest now)
411 (notmuch-address-harvest nil nil
413 ;; If harvest fails, we want to try
414 ;; again when the trigger is next
416 (if (string= event "finished\n")
418 (notmuch-address--save-address-hash)
419 (setq notmuch-address-full-harvest-finished t))
420 (setq notmuch-address-last-harvest 0)))))))
424 (defun notmuch-address-from-minibuffer (prompt)
425 (if (not notmuch-address-command)
427 (let ((rmap (copy-keymap minibuffer-local-map))
428 (omap minibuffer-local-map))
429 ;; Configure TAB to start completion when executing read-string.
430 ;; "Original" minibuffer keymap is restored just before calling
431 ;; notmuch-address-expand-name as it may also use minibuffer-local-map
432 ;; (completing-read probably does not but if something else is used there).
433 (define-key rmap (kbd "TAB") (lambda ()
435 (let ((enable-recursive-minibuffers t)
436 (minibuffer-local-map omap))
437 (notmuch-address-expand-name))))
438 (let ((minibuffer-local-map rmap))
439 (read-string prompt)))))
443 (provide 'notmuch-address)
445 ;;; notmuch-address.el ends here