1 ;; notmuch-lib.el --- common variables, functions and function declarations
3 ;; Copyright © Carl Worth
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 <http://www.gnu.org/licenses/>.
20 ;; Authors: Carl Worth <cworth@cworth.org>
22 ;; This is an part of an emacs-based interface to the notmuch mail system.
29 (defvar notmuch-command "notmuch"
30 "Command to run the notmuch binary.")
33 "Notmuch mail reader for Emacs."
36 (defgroup notmuch-hello nil
37 "Overview of saved searches, tags, etc."
40 (defgroup notmuch-search nil
41 "Searching and sorting mail."
44 (defgroup notmuch-show nil
45 "Showing messages and threads."
48 (defgroup notmuch-send nil
49 "Sending messages from Notmuch."
52 (custom-add-to-group 'notmuch-send 'message 'custom-group)
54 (defgroup notmuch-crypto nil
55 "Processing and display of cryptographic MIME parts."
58 (defgroup notmuch-hooks nil
59 "Running custom code on well-defined occasions."
62 (defgroup notmuch-external nil
63 "Running external commands from within Notmuch."
66 (defgroup notmuch-faces nil
67 "Graphical attributes for displaying text"
70 (defcustom notmuch-search-oldest-first t
71 "Show the oldest mail first when searching."
73 :group 'notmuch-search)
77 (defvar notmuch-search-history nil
78 "Variable to store notmuch searches history.")
80 (defcustom notmuch-saved-searches '(("inbox" . "tag:inbox")
81 ("unread" . "tag:unread"))
82 "A list of saved searches to display."
83 :type '(alist :key-type string :value-type string)
84 :group 'notmuch-hello)
86 (defcustom notmuch-archive-tags '("-inbox")
87 "List of tag changes to apply to a message or a thread when it is archived.
89 Tags starting with \"+\" (or not starting with either \"+\" or
90 \"-\") in the list will be added, and tags starting with \"-\"
91 will be removed from the message or thread being archived.
93 For example, if you wanted to remove an \"inbox\" tag and add an
94 \"archived\" tag, you would set:
95 (\"-inbox\" \"+archived\")"
96 :type '(repeat string)
97 :group 'notmuch-search
100 (defun notmuch-version ()
101 "Return a string with the notmuch version number."
103 ;; Trim off the trailing newline.
104 (substring (shell-command-to-string
105 (concat notmuch-command " --version"))
107 (if (string-match "^notmuch\\( version\\)? \\(.*\\)$"
109 (match-string 2 long-string)
112 (defun notmuch-config-get (item)
113 "Return a value from the notmuch configuration."
114 ;; Trim off the trailing newline
115 (substring (shell-command-to-string
116 (concat notmuch-command " config get " item))
119 (defun notmuch-database-path ()
120 "Return the database.path value from the notmuch configuration."
121 (notmuch-config-get "database.path"))
123 (defun notmuch-user-name ()
124 "Return the user.name value from the notmuch configuration."
125 (notmuch-config-get "user.name"))
127 (defun notmuch-user-primary-email ()
128 "Return the user.primary_email value from the notmuch configuration."
129 (notmuch-config-get "user.primary_email"))
131 (defun notmuch-user-other-email ()
132 "Return the user.other_email value (as a list) from the notmuch configuration."
133 (split-string (notmuch-config-get "user.other_email") "\n"))
135 (defun notmuch-kill-this-buffer ()
136 "Kill the current buffer."
138 (kill-buffer (current-buffer)))
140 (defun notmuch-prettify-subject (subject)
141 ;; This function is used by `notmuch-search-process-filter' which
142 ;; requires that we not disrupt its' matching state.
145 (string-match "^[ \t]*$" subject))
149 (defun notmuch-escape-boolean-term (term)
150 "Escape a boolean term for use in a query.
152 The caller is responsible for prepending the term prefix and a
153 colon. This performs minimal escaping in order to produce
154 user-friendly queries."
157 (if (or (equal term "")
158 (string-match "[ ()]\\|^\"" term))
160 (concat "\"" (replace-regexp-in-string "\"" "\"\"" term t t) "\"")
163 (defun notmuch-id-to-query (id)
164 "Return a query that matches the message with id ID."
165 (concat "id:" (notmuch-escape-boolean-term id)))
169 (defun notmuch-common-do-stash (text)
170 "Common function to stash text in kill ring, and display in minibuffer."
174 (message "Stashed: %s" text))
175 ;; There is nothing to stash so stash an empty string so the user
176 ;; doesn't accidentally paste something else somewhere.
178 (message "Nothing to stash!")))
182 (defun notmuch-remove-if-not (predicate list)
183 "Return a copy of LIST with all items not satisfying PREDICATE removed."
186 (when (funcall predicate (car list))
187 (push (car list) out))
188 (setq list (cdr list)))
191 ;; This lets us avoid compiling these replacement functions when emacs
192 ;; is sufficiently new enough to supply them alone. We do the macro
193 ;; treatment rather than just wrapping our defun calls in a when form
194 ;; specifically so that the compiler never sees the code on new emacs,
195 ;; (since the code is triggering warnings that we don't know how to get
198 ;; A more clever macro here would accept a condition and a list of forms.
199 (defmacro compile-on-emacs-prior-to-23 (form)
200 "Conditionally evaluate form only on emacs < emacs-23."
201 (list 'when (< emacs-major-version 23)
204 (defun notmuch-split-content-type (content-type)
205 "Split content/type into 'content' and 'type'"
206 (split-string content-type "/"))
208 (defun notmuch-match-content-type (t1 t2)
209 "Return t if t1 and t2 are matching content types, taking wildcards into account"
210 (let ((st1 (notmuch-split-content-type t1))
211 (st2 (notmuch-split-content-type t2)))
212 (if (or (string= (cadr st1) "*")
213 (string= (cadr st2) "*"))
214 ;; Comparison of content types should be case insensitive.
215 (string= (downcase (car st1)) (downcase (car st2)))
216 (string= (downcase t1) (downcase t2)))))
218 (defvar notmuch-multipart/alternative-discouraged
222 ;; multipart/related usually contain a text/html part and some associated graphics.
226 (defun notmuch-multipart/alternative-choose (types)
227 "Return a list of preferred types from the given list of types"
228 ;; Based on `mm-preferred-alternative-precedence'.
230 (dolist (pref (reverse notmuch-multipart/alternative-discouraged))
231 (dolist (elem (copy-sequence seq))
232 (when (string-match pref elem)
233 (setq seq (nconc (delete elem seq) (list elem))))))
236 (defun notmuch-parts-filter-by-type (parts type)
237 "Given a list of message parts, return a list containing the ones matching
240 (lambda (part) (notmuch-match-content-type (plist-get part :content-type) type))
243 ;; Helper for parts which are generally not included in the default
245 (defun notmuch-get-bodypart-internal (query part-number process-crypto)
246 (let ((args '("show" "--format=raw"))
247 (part-arg (format "--part=%s" part-number)))
248 (setq args (append args (list part-arg)))
250 (setq args (append args '("--decrypt"))))
251 (setq args (append args (list query)))
253 (let ((coding-system-for-read 'no-conversion))
255 (apply 'call-process (append (list notmuch-command nil (list t nil) nil) args))
258 (defun notmuch-get-bodypart-content (msg part nth process-crypto)
259 (or (plist-get part :content)
260 (notmuch-get-bodypart-internal (notmuch-id-to-query (plist-get msg :id)) nth process-crypto)))
262 ;; Workaround: The call to `mm-display-part' below triggers a bug in
263 ;; Emacs 24 if it attempts to use the shr renderer to display an HTML
264 ;; part with images in it (demonstrated in 24.1 and 24.2 on Debian and
265 ;; Fedora 17, though unreproducable in other configurations).
266 ;; `mm-shr' references the variable `gnus-inhibit-images' without
267 ;; first loading gnus-art, which defines it, resulting in a
268 ;; void-variable error. Hence, we advise `mm-shr' to ensure gnus-art
270 (if (>= emacs-major-version 24)
271 (defadvice mm-shr (before load-gnus-arts activate)
272 (require 'gnus-art nil t)
273 (ad-disable-advice 'mm-shr 'before 'load-gnus-arts)))
275 (defun notmuch-mm-display-part-inline (msg part nth content-type process-crypto)
276 "Use the mm-decode/mm-view functions to display a part in the
277 current buffer, if possible."
278 (let ((display-buffer (current-buffer)))
280 ;; In case there is :content, the content string is already converted
281 ;; into emacs internal format. `gnus-decoded' is a fake charset,
282 ;; which means no further decoding (to be done by mm- functions).
283 (let* ((charset (if (plist-member part :content)
285 (plist-get part :content-charset)))
286 (handle (mm-make-handle (current-buffer) `(,content-type (charset . ,charset)))))
287 ;; If the user wants the part inlined, insert the content and
288 ;; test whether we are able to inline it (which includes both
289 ;; capability and suitability tests).
290 (when (mm-inlined-p handle)
291 (insert (notmuch-get-bodypart-content msg part nth process-crypto))
292 (when (mm-inlinable-p handle)
293 (set-buffer display-buffer)
294 (mm-display-part handle)
297 ;; Converts a plist of headers to an alist of headers. The input plist should
298 ;; have symbols of the form :Header as keys, and the resulting alist will have
299 ;; symbols of the form 'Header as keys.
300 (defun notmuch-headers-plist-to-alist (plist)
301 (loop for (key value . rest) on plist by #'cddr
302 collect (cons (intern (substring (symbol-name key) 1)) value)))
304 (defun notmuch-combine-face-text-property (start end face)
305 "Combine FACE into the 'face text property between START and END.
307 This function combines FACE with any existing faces between START
308 and END. Attributes specified by FACE take precedence over
309 existing attributes. FACE must be a face name (a symbol or
310 string), a property list of face attributes, or a list of these."
314 (let ((cur (get-text-property pos 'face))
315 (next (next-single-property-change pos 'face nil end)))
316 (put-text-property pos next 'face (cons face cur))
319 (defun notmuch-pop-up-error (msg)
320 "Pop up an error buffer displaying MSG.
322 This will accumulate error messages in the errors buffer until
323 the user dismisses it."
325 (let ((buf (get-buffer-create "*Notmuch errors*")))
326 (with-current-buffer buf
327 (view-mode-enter nil #'kill-buffer)
328 (let ((inhibit-read-only t))
329 (goto-char (point-max))
335 (pop-to-buffer buf)))
337 (defun notmuch-check-exit-status (exit-status command &optional output err-file)
338 "If EXIT-STATUS is non-zero, pop up an error buffer and signal an error.
340 If EXIT-STATUS is non-zero, pop up a notmuch error buffer
341 describing the error and signal an Elisp error. EXIT-STATUS must
342 be a number indicating the exit status code of a process or a
343 string describing the signal that terminated the process (such as
344 returned by `call-process'). COMMAND must be a list giving the
345 command and its arguments. OUTPUT, if provided, is a string
346 giving the output of command. ERR-FILE, if provided, is the name
347 of a file containing the error output of command. OUTPUT and the
348 contents of ERR-FILE will be included in the error message."
350 ;; This is implemented as a cond to make it easy to expand.
352 ((eq exit-status 0) t)
354 (notmuch-pop-up-error
356 (format "Error invoking notmuch. %s exited with %s%s.\n"
357 (mapconcat #'identity command " ")
358 ;; Signal strings look like "Terminated", hence the
360 (if (integerp exit-status) "status " "signal: ")
365 (insert-file-contents err-file)
367 "(no error output)\n"
369 (when (and output (not (equal output "")))
370 (format "Output:\n%s" output))))
371 ;; Mimic `process-lines'
372 (error "%s exited with status %s" (car command) exit-status))))
374 (defun notmuch-call-notmuch-json (&rest args)
375 "Invoke `notmuch-command' with `args' and return the parsed JSON output.
377 The returned output will represent objects using property lists
378 and arrays as lists. If notmuch exits with a non-zero status,
379 this will pop up a buffer containing notmuch's output and signal
383 (let ((err-file (make-temp-file "nmerr")))
385 (let ((status (apply #'call-process
386 notmuch-command nil (list t err-file) nil args)))
387 (notmuch-check-exit-status status (cons notmuch-command args)
388 (buffer-string) err-file)
389 (goto-char (point-min))
390 (let ((json-object-type 'plist)
391 (json-array-type 'list)
394 (delete-file err-file)))))
396 ;; Compatibility functions for versions of emacs before emacs 23.
398 ;; Both functions here were copied from emacs 23 with the following copyright:
400 ;; Copyright (C) 1985, 1986, 1992, 1994, 1995, 1999, 2000, 2001, 2002, 2003,
401 ;; 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
403 ;; and under the GPL version 3 (or later) exactly as notmuch itself.
404 (compile-on-emacs-prior-to-23
405 (defun apply-partially (fun &rest args)
406 "Return a function that is a partial application of FUN to ARGS.
407 ARGS is a list of the first N arguments to pass to FUN.
408 The result is a new function which does the same as FUN, except that
409 the first N arguments are fixed at the values with which this function
411 (lexical-let ((fun fun) (args1 args))
412 (lambda (&rest args2) (apply fun (append args1 args2))))))
414 (compile-on-emacs-prior-to-23
415 (defun mouse-event-p (object)
416 "Return non-nil if OBJECT is a mouse click event."
417 (memq (event-basic-type object) '(mouse-1 mouse-2 mouse-3 mouse-movement))))
419 ;; This variable is used only buffer local, but it needs to be
420 ;; declared globally first to avoid compiler warnings.
421 (defvar notmuch-show-process-crypto nil)
422 (make-variable-buffer-local 'notmuch-show-process-crypto)
424 ;; Incremental JSON parsing
426 ;; These two variables are internal variables to the parsing
427 ;; routines. They are always used buffer local but need to be declared
428 ;; globally to avoid compiler warnings.
430 (defvar notmuch-json-parser nil
431 "Internal incremental JSON parser object: local to the buffer being parsed.")
433 (defvar notmuch-json-state nil
434 "State of the internal JSON parser: local to the buffer being parsed.")
436 (defun notmuch-json-create-parser (buffer)
437 "Return a streaming JSON parser that consumes input from BUFFER.
439 This parser is designed to read streaming JSON whose structure is
440 known to the caller. Like a typical JSON parsing interface, it
441 provides a function to read a complete JSON value from the input.
442 However, it extends this with an additional function that
443 requires the next value in the input to be a compound value and
444 descends into it, allowing its elements to be read one at a time
445 or further descended into. Both functions can return 'retry to
446 indicate that not enough input is available.
448 The parser always consumes input from BUFFER's point. Hence, the
449 caller is allowed to delete and data before point and may
450 resynchronize after an error by moving point."
453 ;; Terminator stack: a stack of characters that indicate the
454 ;; end of the compound values enclosing point
457 ;; * 'expect-value if the next token must be a value, but a
458 ;; value has not yet been reached
459 ;; * 'value if point is at the beginning of a value
460 ;; * 'expect-comma if the next token must be a comma
462 ;; Allow terminator: non-nil if the next token may be a
465 ;; Partial parse position: If state is 'value, a marker for
466 ;; the position of the partial parser or nil if no partial
467 ;; parsing has happened yet
469 ;; Partial parse state: If state is 'value, the current
470 ;; `parse-partial-sexp' state
473 (defmacro notmuch-json-buffer (jp) `(first ,jp))
474 (defmacro notmuch-json-term-stack (jp) `(second ,jp))
475 (defmacro notmuch-json-next (jp) `(third ,jp))
476 (defmacro notmuch-json-allow-term (jp) `(fourth ,jp))
477 (defmacro notmuch-json-partial-pos (jp) `(fifth ,jp))
478 (defmacro notmuch-json-partial-state (jp) `(sixth ,jp))
480 (defvar notmuch-json-syntax-table
481 (let ((table (make-syntax-table)))
482 ;; The standard syntax table is what we need except that "." needs
483 ;; to have word syntax instead of punctuation syntax.
484 (modify-syntax-entry ?. "w" table)
486 "Syntax table used for incremental JSON parsing.")
488 (defun notmuch-json-scan-to-value (jp)
489 ;; Helper function that consumes separators, terminators, and
490 ;; whitespace from point. Returns nil if it successfully reached
491 ;; the beginning of a value, 'end if it consumed a terminator, or
492 ;; 'retry if not enough input was available to reach a value. Upon
493 ;; nil return, (notmuch-json-next jp) is always 'value.
495 (if (eq (notmuch-json-next jp) 'value)
496 ;; We're already at a value
498 ;; Drive the state toward 'expect-value
499 (skip-chars-forward " \t\r\n")
500 (or (when (eobp) 'retry)
501 ;; Test for the terminator for the current compound
502 (when (and (notmuch-json-allow-term jp)
503 (eq (char-after) (car (notmuch-json-term-stack jp))))
504 ;; Consume it and expect a comma or terminator next
506 (setf (notmuch-json-term-stack jp) (cdr (notmuch-json-term-stack jp))
507 (notmuch-json-next jp) 'expect-comma
508 (notmuch-json-allow-term jp) t)
510 ;; Test for a separator
511 (when (eq (notmuch-json-next jp) 'expect-comma)
512 (when (/= (char-after) ?,)
513 (signal 'json-readtable-error (list "expected ','")))
514 ;; Consume it, switch to 'expect-value, and disallow a
517 (skip-chars-forward " \t\r\n")
518 (setf (notmuch-json-next jp) 'expect-value
519 (notmuch-json-allow-term jp) nil)
520 ;; We moved point, so test for eobp again and fall through
521 ;; to the next test if there's more input
522 (when (eobp) 'retry))
523 ;; Next must be 'expect-value and we know this isn't
524 ;; whitespace, EOB, or a terminator, so point must be on a
527 (assert (eq (notmuch-json-next jp) 'expect-value))
528 (setf (notmuch-json-next jp) 'value)
531 (defun notmuch-json-begin-compound (jp)
532 "Parse the beginning of a compound value and traverse inside it.
534 Returns 'retry if there is insufficient input to parse the
535 beginning of the compound. If this is able to parse the
536 beginning of a compound, it moves point past the token that opens
537 the compound and returns t. Later calls to `notmuch-json-read'
538 will return the compound's elements.
540 Entering JSON objects is currently unimplemented."
542 (with-current-buffer (notmuch-json-buffer jp)
543 ;; Disallow terminators
544 (setf (notmuch-json-allow-term jp) nil)
545 ;; Save "next" so we can restore it if there's a syntax error
546 (let ((saved-next (notmuch-json-next jp)))
547 (or (notmuch-json-scan-to-value jp)
548 (if (/= (char-after) ?\[)
550 (setf (notmuch-json-next jp) saved-next)
551 (signal 'json-readtable-error (list "expected '['")))
553 (push ?\] (notmuch-json-term-stack jp))
554 ;; Expect a value or terminator next
555 (setf (notmuch-json-next jp) 'expect-value
556 (notmuch-json-allow-term jp) t)
559 (defun notmuch-json-read (jp)
560 "Parse the value at point in JP's buffer.
562 Returns 'retry if there is insufficient input to parse a complete
563 JSON value (though it may still move point over separators or
564 whitespace). If the parser is currently inside a compound value
565 and the next token ends the list or object, this moves point just
566 past the terminator and returns 'end. Otherwise, this moves
567 point to just past the end of the value and returns the value."
569 (with-current-buffer (notmuch-json-buffer jp)
571 ;; Get to a value state
572 (notmuch-json-scan-to-value jp)
574 ;; Can we parse a complete value?
576 (if (looking-at "[-+0-9tfn]")
577 ;; This is a number or a keyword, so the partial
578 ;; parser isn't going to help us because a truncated
579 ;; number or keyword looks like a complete symbol to
580 ;; it. Look for something that clearly ends it.
582 (skip-chars-forward "^]},: \t\r\n")
585 ;; We're looking at a string, object, or array, which we
586 ;; can partial parse. If we just reached the value, set
587 ;; up the partial parser.
588 (when (null (notmuch-json-partial-state jp))
589 (setf (notmuch-json-partial-pos jp) (point-marker)))
591 ;; Extend the partial parse until we either reach EOB or
592 ;; get the whole value
595 (with-syntax-table notmuch-json-syntax-table
597 (notmuch-json-partial-pos jp) (point-max) 0 nil
598 (notmuch-json-partial-state jp)))))
599 ;; A complete value is available if we've reached
600 ;; depth 0 or less and encountered a complete
602 (if (and (<= (first pstate) 0) (third pstate))
604 ;; Not complete. Update the partial parser state
605 (setf (notmuch-json-partial-pos jp) (point-marker)
606 (notmuch-json-partial-state jp) pstate)
611 ;; We have a value. Reset the partial parse state and expect
612 ;; a comma or terminator after the value.
613 (setf (notmuch-json-next jp) 'expect-comma
614 (notmuch-json-allow-term jp) t
615 (notmuch-json-partial-pos jp) nil
616 (notmuch-json-partial-state jp) nil)
618 (let ((json-object-type 'plist)
619 (json-array-type 'list)
623 (defun notmuch-json-eof (jp)
624 "Signal a json-error if there is more data in JP's buffer.
626 Moves point to the beginning of any trailing data or to the end
627 of the buffer if there is only trailing whitespace."
629 (with-current-buffer (notmuch-json-buffer jp)
630 (skip-chars-forward " \t\r\n")
632 (signal 'json-error (list "Trailing garbage following JSON data")))))
634 (defun notmuch-json-parse-partial-list (result-function error-function results-buf)
635 "Parse a partial JSON list from current buffer.
637 This function consumes a JSON list from the current buffer,
638 applying RESULT-FUNCTION in buffer RESULT-BUFFER to each complete
639 value in the list. It operates incrementally and should be
640 called whenever the buffer has been extended with additional
643 If there is a syntax error, this will attempt to resynchronize
644 with the input and will apply ERROR-FUNCTION in buffer
645 RESULT-BUFFER to any input that was skipped.
647 It sets up all the needed internal variables: the caller just
648 needs to call it with point in the same place that the parser
651 (unless (local-variable-p 'notmuch-json-parser)
652 (set (make-local-variable 'notmuch-json-parser)
653 (notmuch-json-create-parser (current-buffer)))
654 (set (make-local-variable 'notmuch-json-state) 'begin))
657 (case notmuch-json-state
659 ;; Enter the results list
660 (if (eq (notmuch-json-begin-compound
661 notmuch-json-parser) 'retry)
663 (setq notmuch-json-state 'result)))
666 (let ((result (notmuch-json-read notmuch-json-parser)))
668 ((retry) (setq done t))
669 ((end) (setq notmuch-json-state 'end))
670 (otherwise (with-current-buffer results-buf
671 (funcall result-function result))))))
673 ;; Any trailing data is unexpected
674 (notmuch-json-eof notmuch-json-parser)
677 ;; Do our best to resynchronize and ensure forward
679 (let ((bad (buffer-substring (line-beginning-position)
680 (line-end-position))))
682 (with-current-buffer results-buf
683 (funcall error-function "%s" bad))))))
684 ;; Clear out what we've parsed
685 (delete-region (point-min) (point))))
690 (provide 'notmuch-lib)
693 ;; byte-compile-warnings: (not cl-functions)