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;;; mu4e-utils.el -- part of mu4e, the mu mail user agent -*- lexical-binding: t -*-
;; Copyright (C) 2011-2020 Dirk-Jan C. Binnema
;; Author: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
;; Maintainer: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
;; This file is not part of GNU Emacs.
;; mu4e is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; mu4e is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with mu4e. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Utility functions used in the mu4e
;;; Code:
(require 'org)
(require 'cl-lib)
(require 'cl-seq nil 'noerror)
(require 'mu4e-vars)
(require 'mu4e-message)
(require 'mu4e-meta)
(require 'mu4e-helpers)
(require 'mu4e-lists)
(require 'mu4e-context)
(require 'doc-view)
;; keep the byte-compiler happy
(declare-function mu4e~proc-mkdir "mu4e-proc")
(declare-function mu4e~proc-ping "mu4e-proc")
(declare-function mu4e~proc-contacts "mu4e-proc")
(declare-function mu4e~proc-kill "mu4e-proc")
(declare-function mu4e~proc-index "mu4e-proc")
(declare-function mu4e~proc-add "mu4e-proc")
(declare-function mu4e~proc-mkdir "mu4e-proc")
(declare-function mu4e~proc-running-p "mu4e-proc")
(declare-function mu4e-message-field-at-point "mu4e-proc")
(declare-function mu4e~proc-running-p "mu4e-proc")
(declare-function mu4e~main-view "mu4e-main")
(declare-function show-all "org")
(defun mu4e-index-message (frm &rest args)
"Display FRM with ARGS like `mu4e-message' for index messages.
index-messages. Doesn't display anything if
`mu4e-hide-index-messages' is non-nil. "
(unless mu4e-hide-index-messages
(apply 'mu4e-message frm args)))
;;; Various
(defun mu4e-copy-message-path ()
"Copy the message-path of message at point to the kill-ring."
(interactive)
(let ((path (mu4e-message-field-at-point :path)))
(kill-new path)
(mu4e-message "Saved '%s' to kill-ring" path)))
(defun mu4e-personal-address-p (addr)
"Is ADDR a personal address?
Evaluate to nil if ADDR matches any of the personal addresses.
Uses (mu4e-personal-addresses) for the addresses with both the plain
addresses and /regular expressions/."
(when addr
(seq-find
(lambda (m)
(if (string-match "/\\(.*\\)/" m)
(let ((rx (match-string 1 m))
(case-fold-search t))
(if (string-match rx addr) t nil))
(eq t (compare-strings addr nil nil m nil nil 'case-insensitive))))
(mu4e-personal-addresses))))
(define-obsolete-function-alias 'mu4e-user-mail-address-p
'mu4e-personal-address-p "1.5.5")
(defmacro with~mu4e-context-vars (context &rest body)
"Evaluate BODY, with variables let-bound for CONTEXT (if any).
`funcall'."
(declare (indent 2))
`(let* ((vars (and ,context (mu4e-context-vars ,context))))
(cl-progv ;; XXX: perhaps use eval's lexical environment instead of progv?
(mapcar (lambda(cell) (car cell)) vars)
(mapcar (lambda(cell) (cdr cell)) vars)
(eval ,@body))))
;;; Folders (1/2)
;; the standard folders can be functions too
(defun mu4e~get-folder (foldervar msg)
"Within the mu-context of MSG, get message folder FOLDERVAR.
If FOLDER is a string, return it, if it is a function, evaluate
this function with MSG as parameter (which may be `nil'), and
return the result."
(unless (member foldervar
'(mu4e-sent-folder mu4e-drafts-folder
mu4e-trash-folder mu4e-refile-folder))
(mu4e-error "Folder must be one of mu4e-(sent|drafts|trash|refile)-folder"))
;; get the value with the vars for the relevants context let-bound
(with~mu4e-context-vars (mu4e-context-determine msg nil)
(let* ((folder (symbol-value foldervar))
(val
(cond
((stringp folder) folder)
((functionp folder) (funcall folder msg))
(t (mu4e-error "unsupported type for %S" folder)))))
(or val (mu4e-error "%S evaluates to nil" foldervar)))))
(defun mu4e-get-drafts-folder (&optional msg)
"Get the sent folder. See `mu4e-drafts-folder'."
(mu4e~get-folder 'mu4e-drafts-folder msg))
(defun mu4e-get-refile-folder (&optional msg)
"Get the folder for refiling. See `mu4e-refile-folder'."
(mu4e~get-folder 'mu4e-refile-folder msg))
(defun mu4e-get-sent-folder (&optional msg)
"Get the sent folder. See `mu4e-sent-folder'."
(mu4e~get-folder 'mu4e-sent-folder msg))
(defun mu4e-get-trash-folder (&optional msg)
"Get the sent folder. See `mu4e-trash-folder'."
(mu4e~get-folder 'mu4e-trash-folder msg))
;;; Self-destructing files
(defun mu4e-remove-file-later (filename)
"Remove FILENAME in a few seconds."
(run-at-time "30 sec" nil
(lambda () (ignore-errors (delete-file filename)))))
(defun mu4e-make-temp-file (ext)
"Create a temporary file with extension EXT. The file will
self-destruct in a few seconds, enough to open it in another
program."
(let ((tmpfile (make-temp-file "mu4e-" nil (concat "." ext))))
(mu4e-remove-file-later tmpfile)
tmpfile))
;;; Folders (2/2)
;;
;; mu4e-attachment-dir is either a string or a function that takes a
;; filename and the mime-type as argument, either (or both) which can
;; be nil
(defun mu4e~get-attachment-dir (&optional fname mimetype)
"Get the directory for saving attachments from
`mu4e-attachment-dir' (which can be either a string or a function,
see its docstring)."
(let
((dir
(cond
((stringp mu4e-attachment-dir)
mu4e-attachment-dir)
((functionp mu4e-attachment-dir)
(funcall mu4e-attachment-dir fname mimetype))
(t
(mu4e-error "unsupported type for mu4e-attachment-dir" )))))
(if dir
(expand-file-name dir)
(mu4e-error "mu4e-attachment-dir evaluates to nil"))))
;;; Maildirs
(defun mu4e~guess-maildir (path)
"Guess the maildir for some path, or nil if cannot find it."
(let ((idx (string-match (mu4e-root-maildir) path)))
(when (and idx (zerop idx))
(replace-regexp-in-string
(mu4e-root-maildir)
""
(expand-file-name
(concat path "/../.."))))))
(defun mu4e-create-maildir-maybe (dir)
"Offer to create maildir DIR if it does not exist yet.
Return t if the dir already existed, or an attempt has been made to
create it -- we cannot be sure creation succeeded here, since this
is done asynchronously. Otherwise, return nil. NOte, DIR has to be
an absolute path."
(if (and (file-exists-p dir) (not (file-directory-p dir)))
(mu4e-error "%s exists, but is not a directory." dir))
(cond
((file-directory-p dir) t)
((yes-or-no-p (mu4e-format "%s does not exist yet. Create now?" dir))
(mu4e~proc-mkdir dir) t)
(t nil)))
(defun mu4e~get-maildirs-1 (path mdir)
"Get maildirs under path, recursively, as a list of relative paths."
(let ((dirs)
(dentries
(ignore-errors
(directory-files-and-attributes
(concat path mdir) nil
"^[^.]\\|\\.[^.][^.]" t))))
(dolist (dentry dentries)
(when (and (booleanp (cadr dentry)) (cadr dentry))
(if (file-accessible-directory-p
(concat (mu4e-root-maildir) "/" mdir "/" (car dentry) "/cur"))
(setq dirs (cons (concat mdir (car dentry)) dirs)))
(unless (member (car dentry) '("cur" "new" "tmp"))
(setq dirs (append dirs (mu4e~get-maildirs-1 path
(concat mdir (car dentry) "/")))))))
dirs))
(defvar mu4e-cache-maildir-list nil
"Whether to cache the list of maildirs; set it to t if you find
that generating the list on the fly is too slow. If you do, you
can set `(mu4e-root-maildir)-list' to nil to force regenerating the
cache the next time `mu4e-get-maildirs' gets called.")
(defvar mu4e-maildir-list nil
"Cached list of maildirs.")
(defun mu4e-get-maildirs ()
"Get maildirs under `mu4e-maildir', recursively, as a list of
relative paths (ie., /archive, /sent etc.). Most of the work is
done in `mu4e~get-maildirs-1'. Note, these results are /cached/
if `mu4e-cache-maildir-list' is customized to non-nil. In that case,
the list of maildirs will not change until you restart mu4e."
(unless (and mu4e-maildir-list mu4e-cache-maildir-list)
(setq mu4e-maildir-list
(sort
(append
(when (file-accessible-directory-p
(concat (mu4e-root-maildir) "/cur")) '("/"))
(mu4e~get-maildirs-1 (mu4e-root-maildir) "/"))
(lambda (s1 s2) (string< (downcase s1) (downcase s2))))))
mu4e-maildir-list)
(defun mu4e-ask-maildir (prompt)
"Ask the user for a shortcut (using PROMPT) as per
(mu4e-maildir-shortcuts), then return the corresponding folder
name. If the special shortcut 'o' (for _o_ther) is used, or if
`(mu4e-maildir-shortcuts)' evaluates to nil, let user choose from
all maildirs under `mu4e-maildir'."
(let ((prompt (mu4e-format "%s" prompt)))
(if (not (mu4e-maildir-shortcuts))
(substring-no-properties
(funcall mu4e-completing-read-function prompt (mu4e-get-maildirs)))
(let* ((mlist (append (mu4e-maildir-shortcuts)
'((:maildir "ther" :key ?o))))
(fnames
(mapconcat
(lambda (item)
(concat
"["
(propertize (make-string 1 (plist-get item :key))
'face 'mu4e-highlight-face)
"]"
(plist-get item :maildir)))
mlist ", "))
(kar (read-char (concat prompt fnames))))
(if (member kar '(?/ ?o)) ;; user chose 'other'?
(substring-no-properties
(funcall mu4e-completing-read-function prompt
(mu4e-get-maildirs) nil nil "/"))
(or (plist-get
(cl-find-if (lambda (item) (= kar (plist-get item :key)))
(mu4e-maildir-shortcuts)) :maildir)
(mu4e-warn "Unknown shortcut '%c'" kar)))))))
(defun mu4e-ask-maildir-check-exists (prompt)
"Like `mu4e-ask-maildir', but check for existence of the maildir,
and offer to create it if it does not exist yet."
(let* ((mdir (mu4e-ask-maildir prompt))
(fullpath (concat (mu4e-root-maildir) mdir)))
(unless (file-directory-p fullpath)
(and (yes-or-no-p
(mu4e-format "%s does not exist. Create now?" fullpath))
(mu4e~proc-mkdir fullpath)))
mdir))
;;; Bookmarks
(defun mu4e-ask-bookmark (prompt)
"Ask the user for a bookmark (using PROMPT) as defined in
`mu4e-bookmarks', then return the corresponding query."
(unless (mu4e-bookmarks) (mu4e-error "No bookmarks defined"))
(let* ((prompt (mu4e-format "%s" prompt))
(bmarks
(mapconcat
(lambda (bm)
(concat
"[" (propertize (make-string 1 (plist-get bm :key))
'face 'mu4e-highlight-face)
"]"
(plist-get bm :name))) (mu4e-bookmarks) ", "))
(kar (read-char (concat prompt bmarks))))
(mu4e-get-bookmark-query kar)))
(defun mu4e-get-bookmark-query (kar)
"Get the corresponding bookmarked query for shortcut character
KAR, or raise an error if none is found."
(let* ((chosen-bm
(or (cl-find-if
(lambda (bm)
(= kar (plist-get bm :key)))
(mu4e-bookmarks))
(mu4e-warn "Unknown shortcut '%c'" kar)))
(expr (plist-get chosen-bm :query))
(expr (if (not (functionp expr)) expr
(funcall expr)))
(query (eval expr)))
(if (stringp query)
query
(mu4e-warn "Expression must evaluate to query string ('%S')" expr))))
(defun mu4e-bookmark-define (query name key)
"Define a bookmark for QUERY with name NAME and
shortcut-character KEY in the list of `mu4e-bookmarks'. This
replaces any existing bookmark with KEY."
(setq mu4e-bookmarks
(cl-remove-if
(lambda (bm)
(= (plist-get bm :key) key))
(mu4e-bookmarks)))
(cl-pushnew `(:name ,name
:query ,query
:key ,key)
mu4e-bookmarks :test 'equal))
(defun mu4e-display-manual ()
"Display the mu4e manual page for the current mode.
Or go to the top level if there is none."
(interactive)
(info (cl-case major-mode
('mu4e-main-mode "(mu4e)Main view")
('mu4e-headers-mode "(mu4e)Headers view")
('mu4e-view-mode "(mu4e)Message view")
(t "mu4e"))))
;;; Misc
(defun mu4e-last-query ()
"Get the most recent query or nil if there is none."
(when (buffer-live-p (mu4e-get-headers-buffer))
(with-current-buffer (mu4e-get-headers-buffer)
mu4e~headers-last-query)))
(defvar gnus-article-buffer) ;; Fix byte-compiler warning.
(defun mu4e-get-view-buffer ()
"Get the view buffer, if any."
(get-buffer
(if mu4e-view-use-old
mu4e~view-buffer-name
gnus-article-buffer)))
(defun mu4e-get-headers-buffer ()
(get-buffer mu4e~headers-buffer-name))
(defun mu4e-select-other-view ()
"When the headers view is selected, select the message view (if
that has a live window), and vice versa."
(interactive)
(let* ((other-buf
(cond
((eq major-mode 'mu4e-headers-mode)
(mu4e-get-view-buffer))
((eq major-mode 'mu4e-view-mode)
(mu4e-get-headers-buffer))))
(other-win (and other-buf (get-buffer-window other-buf))))
(if (window-live-p other-win)
(select-window other-win)
(mu4e-message "No window to switch to"))))
(defconst mu4e-output-buffer-name "*mu4e-output*"
"*internal* Name of the mu4e output buffer.")
(defun mu4e-process-file-through-pipe (path pipecmd)
"Process file at PATH through a pipe with PIPECMD."
(let ((buf (get-buffer-create mu4e-output-buffer-name)))
(with-current-buffer buf
(let ((inhibit-read-only t))
(erase-buffer)
(call-process-shell-command pipecmd path t t)
(view-mode)))
(switch-to-buffer buf)))
(defvar mu4e~lists-hash nil
"Hashtable of mailing-list-id => shortname, based on
`mu4e~mailing-lists' and `mu4e-user-mailing-lists'.")
(defun mu4e-get-mailing-list-shortname (list-id)
"Get the shortname for a mailing-list with list-id LIST-ID. based
on `mu4e~mailing-lists', `mu4e-user-mailing-lists', and
`mu4e-mailing-list-patterns'."
(unless mu4e~lists-hash
(setq mu4e~lists-hash (make-hash-table :test 'equal))
(dolist (cell mu4e~mailing-lists)
(puthash (car cell) (cdr cell) mu4e~lists-hash))
(dolist (cell mu4e-user-mailing-lists)
(puthash (car cell) (cdr cell) mu4e~lists-hash)))
(or
(gethash list-id mu4e~lists-hash)
(and (boundp 'mu4e-mailing-list-patterns)
(cl-member-if
(lambda (pattern)
(string-match pattern list-id))
mu4e-mailing-list-patterns)
(match-string 1 list-id))
;; if it's not in the db, take the part until the first dot if there is one;
;; otherwise just return the whole thing
(if (string-match "\\([^.]*\\)\\." list-id)
(match-string 1 list-id)
list-id)))
(defvar mu4e-index-updated-hook nil
"Hook run when the indexing process had one or more updated messages.
This can be used as a simple way to invoke some action when new
messages appear, but note that an update in the index does not
necessarily mean a new message.")
(defvar mu4e-message-changed-hook nil
"Hook run when there is a message changed in db. For new
messages, it depends on `mu4e-index-updated-hook'. This can be
used as a simple way to invoke some action when a message
changed.")
(make-obsolete-variable 'mu4e-msg-changed-hook
'mu4e-message-changed-hook "0.9.19")
(defvar mu4e~contacts-tstamp "0"
"Timestamp for the most recent contacts update." )
;;; Some handler functions for server messages
(defun mu4e-info-handler (info)
"Handler function for (:info ...) sexps received from the server
process."
(let* ((type (plist-get info :info))
(processed (plist-get info :processed))
(updated (plist-get info :updated))
(cleaned-up (plist-get info :cleaned-up))
(mainbuf (get-buffer mu4e-main-buffer-name)))
(cond
((eq type 'add) t) ;; do nothing
((eq type 'index)
(if (eq (plist-get info :status) 'running)
(mu4e-index-message
"Indexing... processed %d, updated %d" processed updated)
(progn
(mu4e-index-message
"%s completed; processed %d, updated %d, cleaned-up %d"
(if mu4e-index-lazy-check "Lazy indexing" "Indexing")
processed updated cleaned-up)
;; call the updated hook if anything changed.
(unless (zerop (+ updated cleaned-up))
(run-hooks 'mu4e-index-updated-hook))
(unless (and (not (string= mu4e~contacts-tstamp "0"))
(zerop (plist-get info :updated)))
(mu4e~request-contacts-maybe))
(when (and (buffer-live-p mainbuf) (get-buffer-window mainbuf))
(save-window-excursion
(select-window (get-buffer-window mainbuf))
(mu4e~main-view 'refresh))))))
((plist-get info :message)
(mu4e-index-message "%s" (plist-get info :message))))))
(defun mu4e-error-handler (errcode errmsg)
"Handler function for showing an error."
;; don't use mu4e-error here; it's running in the process filter context
(cl-case errcode
(4 (user-error "No matches for this search query."))
(110 (display-warning 'mu4e errmsg :error)) ;; schema version.
(t (error "Error %d: %s" errcode errmsg))))
;;; Contacts
(defun mu4e~update-contacts (contacts &optional tstamp)
"Receive a sorted list of CONTACTS.
Each of the contacts has the form
(FULL_EMAIL_ADDRESS . RANK) and fill `mu4e~contacts-hash' with
it, with each contact mapped to an integer for their ranking.
This is used by the completion function in mu4e-compose."
;; We have our nicely sorted list, map them to a list
;; of increasing integers. We use that map in the composer
;; to sort them there. It would have been so much easier if emacs
;; allowed us to use the sorted-list as-is, but no such luck.
(let ((n 0))
(unless mu4e~contacts-hash
(setq mu4e~contacts-hash (make-hash-table :test 'equal :weakness nil
:size (length contacts))))
(dolist (contact contacts)
(cl-incf n)
(let* ((address (plist-get contact :address))
(address
(if (functionp mu4e-contact-process-function)
(funcall mu4e-contact-process-function address)
address)))
(when address ;; note the explicit deccode; the strings we get are utf-8,
;; but emacs doesn't know yet.
(puthash (decode-coding-string address 'utf-8)
(plist-get contact :rank) mu4e~contacts-hash))))
(setq mu4e~contacts-tstamp (or tstamp "0"))
(unless (zerop n)
(mu4e-index-message "Contacts updated: %d; total %d"
n (hash-table-count mu4e~contacts-hash)))))
(defun mu4e-contacts-info ()
"Display information about the cache used for contacts
completion; for testing/debugging."
(interactive)
(with-current-buffer (get-buffer-create "*mu4e-contacts-info*")
(erase-buffer)
(insert (format "complete addresses: %s\n"
(if mu4e-compose-complete-addresses "yes" "no")))
(insert (format "only personal addresses: %s\n"
(if mu4e-compose-complete-only-personal "yes" "no")))
(insert (format "only addresses seen after: %s\n"
(or mu4e-compose-complete-only-after "no restrictions")))
(when mu4e~contacts-hash
(insert (format "number of contacts cached: %d\n\n"
(hash-table-count mu4e~contacts-hash)))
(let ((contacts))
(maphash (lambda (addr rank)
(setq contacts (cons (cons rank addr) contacts)))
mu4e~contacts-hash)
(setq contacts (sort contacts
(lambda(cell1 cell2) (< (car cell1) (car cell2)))))
(dolist (contact contacts)
(insert (format "%s\n" (cdr contact))))))
(pop-to-buffer "*mu4e-contacts-info*")))
(defun mu4e~check-requirements ()
"Check for the settings required for running mu4e."
(unless (>= emacs-major-version 25)
(mu4e-error "Emacs >= 25.x is required for mu4e"))
(when mu4e--server-props
(unless (string= (mu4e-server-version) mu4e-mu-version)
(mu4e-error "mu server has version %s, but we need %s"
(mu4e-server-version) mu4e-mu-version)))
(unless (and mu4e-mu-binary (file-executable-p mu4e-mu-binary))
(mu4e-error "Please set `mu4e-mu-binary' to the full path to the mu
binary."))
(dolist (var '(mu4e-sent-folder mu4e-drafts-folder
mu4e-trash-folder))
(unless (and (boundp var) (symbol-value var))
(mu4e-error "Please set %S" var))
(unless (functionp (symbol-value var)) ;; functions are okay, too
(let* ((dir (symbol-value var))
(path (concat (mu4e-root-maildir) dir)))
(unless (string= (substring dir 0 1) "/")
(mu4e-error "%S must start with a '/'" dir))
(unless (mu4e-create-maildir-maybe path)
(mu4e-error "%s (%S) does not exist" path var))))))
(defun mu4e-running-p ()
"Whether mu4e is running.
Checks whether the server process is live."
(mu4e~proc-running-p))
;;; Starting / getting mail / updating the index
(defvar mu4e~update-timer nil
"The mu4e update timer.")
(defconst mu4e~update-name " *mu4e-update*"
"Name of the process and buffer to update mail.")
(defconst mu4e~update-buffer-height 8
"Height of the mu4e message retrieval/update buffer.")
(defvar mu4e~get-mail-ask-password "mu4e get-mail: Enter password: "
"Query string for `mu4e-get-mail-command' password.")
(defvar mu4e~get-mail-password-regexp "^Remote: Enter password: $"
"Regexp to match a password query in the `mu4e-get-mail-command' output.")
(defun mu4e~request-contacts-maybe ()
"If `mu4e-compose-complete-addresses' is non-nil, get/update
the list of contacts we use for autocompletion; otherwise, do
nothing."
(when mu4e-compose-complete-addresses
(setq mu4e-contacts-func 'mu4e~update-contacts)
(mu4e~proc-contacts
mu4e-compose-complete-only-personal
mu4e-compose-complete-only-after
mu4e~contacts-tstamp)))
(defun mu4e~pong-handler (data func)
"Handle 'pong' responses from the mu server."
(let ((doccount (plist-get mu4e--server-props :doccount)))
(mu4e~check-requirements)
(when func (funcall func))
(when (zerop doccount)
(mu4e-message "Store is empty; (re)indexing. This may take a while.") ;
(mu4e-update-index))
(when (and mu4e-update-interval (null mu4e~update-timer))
(setq mu4e~update-timer
(run-at-time 0 mu4e-update-interval
(lambda () (mu4e-update-mail-and-index
mu4e-index-update-in-background)))))))
(defun mu4e~start (&optional func)
"If `mu4e-contexts' have been defined, but we don't have a
context yet, switch to the matching one, or none matches, the
first. If mu4e is already running, execute function FUNC (if
non-nil). Otherwise, check various requireme`'nts, then start mu4e.
When successful, call FUNC (if non-nil) afterwards."
(unless (mu4e-context-current)
(mu4e--context-autoswitch nil mu4e-context-policy))
(setq mu4e-pong-func (lambda (info) (mu4e~pong-handler info func)))
(mu4e~proc-ping
(mapcar ;; send it a list of queries we'd like to see read/unread info for
(lambda (bm)
(funcall (or mu4e-query-rewrite-function #'identity)
(plist-get bm :query)))
;; exclude bookmarks that are not strings, and with certain flags
(seq-filter (lambda (bm)
(and (stringp (plist-get bm :query))
(not (or (plist-get bm :hide) (plist-get bm :hide-unread)))))
(append (mu4e-bookmarks)
(mu4e~maildirs-with-query)))))
;; maybe request the list of contacts, automatically refreshed after
;; reindexing
(unless mu4e~contacts-hash (mu4e~request-contacts-maybe)))
(defun mu4e-clear-caches ()
"Clear any cached resources."
(setq
mu4e-maildir-list nil
mu4e~contacts-hash nil
mu4e~contacts-tstamp "0"))
(defun mu4e~stop ()
"Stop the mu4e se ssion."
(when mu4e~update-timer
(cancel-timer mu4e~update-timer)
(setq mu4e~update-timer nil))
(mu4e-clear-caches)
(mu4e~proc-kill)
;; kill all mu4e buffers
(mapc
(lambda (buf)
;; When using the Gnus-based viewer, the view buffer has the
;; kill-buffer-hook function mu4e~view-kill-buffer-hook-fn which kills the
;; mm-* buffers created by Gnus' article mode. Those have been returned by
;; `buffer-list' but might already be deleted in case the view buffer has
;; been killed first. So we need a `buffer-live-p' check here.
(when (buffer-live-p buf)
(with-current-buffer buf
(when (member major-mode
'(mu4e-headers-mode mu4e-view-mode mu4e-main-mode))
(kill-buffer)))))
(buffer-list)))
(defun mu4e~maildirs-with-query ()
"Return a copy of `mu4e-maildirs-shortcuts' with :query populated.
This is meant to be the exact same data structure as
`mu4e-bookmarks'."
(cl-mapcar
(lambda (m)
(append
;; we want to change the :maildir key to :name, and add a :query key
(list :name (plist-get m :maildir)
:query (format "maildir:\"%s\"" (plist-get m :maildir)))
;; next we want to append any other keys to our previous list (e.g. :hide,
;; :key, etc) but skipping :maildir (since it's renamed to :name)
(cl-loop for (key value) on m by 'cddr
when (not (equal key :maildir))
append (list key value))))
(mu4e-maildir-shortcuts)))
(defun mu4e~longest-of-maildirs-and-bookmarks ()
"Return the length of longest name of bookmarks and maildirs."
(cl-loop for b in (append (mu4e-bookmarks)
(mu4e~maildirs-with-query))
maximize (string-width (plist-get b :name))))
;;; Indexing & Updating
(defvar mu4e~progress-reporter nil
"Internal, the progress reporter object.")
(defun mu4e~get-mail-process-filter (proc msg)
"Filter the output of `mu4e-get-mail-command'.
Currently the filter only checks if the command asks for a password
by matching the output against `mu4e~get-mail-password-regexp'.
The messages are inserted into the process buffer.
Also scrolls to the final line, and update the progress throbber."
(when mu4e~progress-reporter
(progress-reporter-update mu4e~progress-reporter))
(when (string-match mu4e~get-mail-password-regexp msg)
(if (process-get proc 'x-interactive)
(process-send-string proc
(concat (read-passwd mu4e~get-mail-ask-password)
"\n"))
;; TODO kill process?
(mu4e-error "Unrecognized password request")))
(when (process-buffer proc)
(let ((inhibit-read-only t)
(procwin (get-buffer-window (process-buffer proc))))
;; Insert at end of buffer. Leave point alone.
(with-current-buffer (process-buffer proc)
(goto-char (point-max))
(if (string-match ".*\r\\(.*\\)" msg)
(progn
;; kill even with \r
(end-of-line)
(let ((end (point)))
(beginning-of-line)
(delete-region (point) end))
(insert (match-string 1 msg)))
(insert msg)))
;; Auto-scroll unless user is interacting with the window.
(when (and (window-live-p procwin)
(not (eq (selected-window) procwin)))
(with-selected-window procwin
(goto-char (point-max)))))))
(defun mu4e-update-index ()
"Update the mu4e index."
(interactive)
(mu4e~proc-index mu4e-index-cleanup mu4e-index-lazy-check))
(defun mu4e-update-index-nonlazy ()
"Update the mu4e index non-lazily.
This is just a convenience wrapper for indexing the non-lazy way
if you otherwise want to use `mu4e-index-lazy-check'."
(interactive)
(let ((mu4e-index-cleanup t) (mu4e-index-lazy-check nil))
(mu4e-update-index)))
(defvar mu4e~update-buffer nil
"Internal, store the buffer of the update process when
updating.")
(define-derived-mode mu4e~update-mail-mode special-mode "mu4e:update"
"Major mode used for retrieving new e-mail messages in `mu4e'.")
(define-key mu4e~update-mail-mode-map (kbd "q") 'mu4e-kill-update-mail)
(defun mu4e~temp-window (buf height)
"Create a temporary window with HEIGHT at the bottom of the
frame to display buffer BUF."
(let ((win
(split-window
(frame-root-window)
(- (window-height (frame-root-window)) height))))
(set-window-buffer win buf)
(set-window-dedicated-p win t)
win))
(defun mu4e~update-sentinel-func (proc _msg)
"Sentinel function for the update process."
(when mu4e~progress-reporter
(progress-reporter-done mu4e~progress-reporter)
(setq mu4e~progress-reporter nil))
(unless mu4e-hide-index-messages
(message nil))
(if (or (not (eq (process-status proc) 'exit))
(/= (process-exit-status proc) 0))
(progn
(when mu4e-index-update-error-warning
(mu4e-message "Update process returned with non-zero exit code")
(sit-for 5))
(when mu4e-index-update-error-continue
(mu4e-update-index)))
(mu4e-update-index))
(when (buffer-live-p mu4e~update-buffer)
(unless (eq mu4e-split-view 'single-window)
(mapc #'delete-window (get-buffer-window-list mu4e~update-buffer)))
(kill-buffer mu4e~update-buffer)))
;; complicated function, as it:
;; - needs to check for errors
;; - (optionally) pop-up a window
;; - (optionally) check password requests
(defun mu4e~update-mail-and-index-real (run-in-background)
"Get a new mail by running `mu4e-get-mail-command'. If
RUN-IN-BACKGROUND is non-nil (or called with prefix-argument),
run in the background; otherwise, pop up a window."
(let* ((process-connection-type t)
(proc (start-process-shell-command
"mu4e-update" mu4e~update-name
mu4e-get-mail-command))
(buf (process-buffer proc))
(win (or run-in-background
(mu4e~temp-window buf mu4e~update-buffer-height))))
(setq mu4e~update-buffer buf)
(when (window-live-p win)
(with-selected-window win
;; ;;(switch-to-buffer buf)
;; (set-window-dedicated-p win t)
(erase-buffer)
(insert "\n") ;; FIXME -- needed so output starts
(mu4e~update-mail-mode)))
(setq mu4e~progress-reporter
(unless mu4e-hide-index-messages
(make-progress-reporter
(mu4e-format "Retrieving mail..."))))
(set-process-sentinel proc 'mu4e~update-sentinel-func)
;; if we're running in the foreground, handle password requests
(unless run-in-background
(process-put proc 'x-interactive (not run-in-background))
(set-process-filter proc 'mu4e~get-mail-process-filter))))
(defun mu4e-update-mail-and-index (run-in-background)
"Get a new mail by running `mu4e-get-mail-command'. If
run-in-background is non-nil (or called with prefix-argument), run
in the background; otherwise, pop up a window."
(interactive "P")
(unless mu4e-get-mail-command
(mu4e-error "`mu4e-get-mail-command' is not defined"))
(if (and (buffer-live-p mu4e~update-buffer)
(process-live-p (get-buffer-process mu4e~update-buffer)))
(mu4e-message "Update process is already running")
(progn
(run-hooks 'mu4e-update-pre-hook)
(mu4e~update-mail-and-index-real run-in-background))))
(defun mu4e-kill-update-mail ()
"Stop the update process by killing it."
(interactive)
(let* ((proc (and (buffer-live-p mu4e~update-buffer)
(get-buffer-process mu4e~update-buffer))))
(when (process-live-p proc)
(kill-process proc t))))
(define-obsolete-function-alias 'mu4e-interrupt-update-mail
'mu4e-kill-update-mail "1.0-alpha0")
;;; Misc 2
(defvar mu4e-imagemagick-identify "identify"
"Name/path of the Imagemagick 'identify' program.")
(defun mu4e~image-width-scale (width height max_width max_height)
"Returns a width to use for proportional image scaling
to satisfy both MAX_WIDTH and MAX_HEIGHT restrictions."
(floor
(if (<= width max_width)
(if (<= height max_height)
width ; both width and height ok, just return width
(* (/ max_height (float height)) width)) ; height is too large, scale width by hmax/h
(if (<= height max_height)
max_width ; width is too large, return max_width as scaling
(let ((width_heightscale (* (/ max_height (float height)) width)))
(min max_width width_heightscale)))))) ; both too large, return smallest width
(defun mu4e-display-image (imgpath &optional maxwidth maxheight)
"Display image IMG at point; optionally specify MAXWIDTH and
MAXHEIGHT. Function tries to use imagemagick if available (ie.,
emacs was compiled with imagemagick support); otherwise MAXWIDTH
and MAXHEIGHT are ignored."
(let* ((have-im (and (fboundp 'imagemagick-types)
(imagemagick-types))) ;; hmm, should check for specific type
(identify (and have-im maxwidth
(executable-find mu4e-imagemagick-identify)))
(props (and identify (mapcar 'string-to-number
(split-string (shell-command-to-string
(format "%s -format '%%w %%h' %s"
identify (shell-quote-argument imgpath)))))))
(width (and props (car props)))
(height (and props (car (cdr props))))
(img (if have-im
(create-image imgpath 'imagemagick nil
:width (mu4e~image-width-scale width height maxwidth maxheight))
(create-image imgpath))))
(when img
(save-excursion
(insert "\n")
(let ((size (image-size img))) ;; inspired by gnus..
(insert-char ?\n
(max 0 (round (- (window-height) (or maxheight (cdr size)) 1) 2)))
(insert-char ?\.
(max 0 (round (- (window-width) (or maxwidth (car size))) 2)))
(insert-image img))))))
(defun mu4e-hide-other-mu4e-buffers ()
"Bury mu4e-buffers (main, headers, view) (and delete all windows
displaying it). Do _not_ bury the current buffer, though."
(interactive)
(unless (eq mu4e-split-view 'single-window)
(let ((curbuf (current-buffer)))
;; note: 'walk-windows' does not seem to work correctly when modifying
;; windows; therefore, the doloops here
(dolist (frame (frame-list))
(dolist (win (window-list frame nil))
(with-current-buffer (window-buffer win)
(unless (eq curbuf (current-buffer))
(when (member major-mode '(mu4e-headers-mode mu4e-view-mode))
(when (eq t (window-deletable-p win))
(delete-window win))))))) t)))
;;; Mu4e-org-mode
(define-derived-mode mu4e-org-mode org-mode "mu4e:org"
"Major mode for mu4e documents, derived from
`org-mode'.")
(defun mu4e-info (path)
"Show a buffer with the information (an org-file) at PATH."
(unless (file-exists-p path)
(mu4e-error "Cannot find %s" path))
(let ((curbuf (current-buffer)))
(find-file path)
(mu4e-org-mode)
(setq buffer-read-only t)
(define-key mu4e-org-mode-map (kbd "q")
`(lambda ()
(interactive)
(bury-buffer)
(switch-to-buffer ,curbuf)))))
(defun mu4e-about ()
"Show the mu4e 'about' page."
(interactive)
(mu4e-info (concat mu4e-doc-dir "/mu4e-about.org")))
(defun mu4e-news ()
"Show the mu4e 'about' page."
(interactive)
(mu4e-info (concat mu4e-doc-dir "/NEWS.org")))
;;; Misc 3
(defun mu4e-refresh-message (path)
"Re-parse message at PATH; if this works, we will
receive (:info add :path <path> :docid <docid>) as well as (:update
<msg-sexp>)."
(mu4e~proc-add path))
(defun mu4e~fontify-cited ()
"Colorize message content based on the citation level. This is
used in the view and compose modes."
(save-excursion
(goto-char (point-min))
(when (search-forward-regexp "^\n" nil t) ;; search the first empty line
(while (re-search-forward mu4e-cited-regexp nil t)
(let* ((level (string-width (replace-regexp-in-string
"[^>]" "" (match-string 0))))
(face (unless (zerop level)
(intern-soft (format "mu4e-cited-%d-face" level)))))
(when face
(add-text-properties (line-beginning-position 1)
(line-end-position 1) `(face ,face))))))))
(defun mu4e~fontify-signature ()
"Give the message signatures a distinctive color. This is used in
the view and compose modes and will color each signature in digest messages adhering to RFC 1153."
(let ((inhibit-read-only t))
(save-excursion
;; give the footer a different color...
(goto-char (point-min))
(while (re-search-forward "^-- *$" nil t)
(let ((p (point))
(end (or
(re-search-forward "\\(^-\\{30\\}.*$\\)" nil t) ;; 30 by RFC1153
(point-max))))
(add-text-properties p end '(face mu4e-footer-face)))))))
;;; Misc 4
(defun mu4e~active-composition-buffers ()
"Return all active mu4e composition buffers"
(let (buffers)
(save-excursion
(dolist (buffer (buffer-list t))
(set-buffer buffer)
(when (eq major-mode 'mu4e-compose-mode)
(push (buffer-name buffer) buffers))))
(nreverse buffers)))
;;
;; Loading messages
;;
(defvar mu4e-loading-mode-map nil "Keymap for *mu4e-loading* buffers.")
(unless mu4e-loading-mode-map
(setq mu4e-loading-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "n" 'ignore)
(define-key map "p" 'ignore)
(define-key map "q"
(lambda()(interactive)
(if (eq mu4e-split-view 'single-window)
'kill-buffer
'kill-buffer-and-window)))
map)))
(fset 'mu4e-loading-mode-map mu4e-loading-mode-map)
(define-derived-mode mu4e-loading-mode special-mode
"mu4e:loading"
(use-local-map mu4e-loading-mode-map)
(let ((inhibit-read-only t))
(erase-buffer)
(insert (propertize "Loading message..."
'face 'mu4e-system-face 'intangible t))))
;;
;; Bug Reference mode support
;;
;; This is Emacs 28 stuff but there is no need to guard it with some (f)boundp
;; checks (which would return nil if bug-reference.el is not loaded before
;; mu4e) since the function definition doesn't hurt and `add-hook' works fine
;; for not yet defined variables (by creating them).
(declare-function bug-reference-maybe-setup-from-mail "ext:bug-reference")
(defun mu4e-view--try-setup-bug-reference-mode ()
"Try to guess bug-reference setup from the current mu4e mail.
Looks at the maildir and the mail headers List, List-Id, Maildir,
To, From, Cc, and Subject and tries to guess suitable values for
`bug-reference-bug-regexp' and `bug-reference-url-format' by
matching the maildir name against GROUP-REGEXP and each header
value against HEADER-REGEXP in
`bug-reference-setup-from-mail-alist'."
(when (derived-mode-p 'mu4e-view-mode)
(let (header-values)
(save-excursion
(goto-char (point-min))
(dolist (field '("list" "list-id" "to" "from" "cc" "subject"))
(let ((val (mail-fetch-field field)))
(when val
(push val header-values)))))
(bug-reference-maybe-setup-from-mail
(mail-fetch-field "maildir")
header-values))))
(add-hook 'bug-reference-auto-setup-functions
#'mu4e-view--try-setup-bug-reference-mode)
;;;
(provide 'mu4e-utils)
;;; mu4e-utils.el ends here
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