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;;; jao-notmuch.el --- Extensions for notmuch -*- lexical-binding: t; -*-
;; Copyright (C) 2021 jao
;; Author: jao <mail@jao.io>
;; Keywords: mail
;; This program 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.
;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Extensions to vanilla notmuch, mostly for tree view
;;; Code:
(require 'eww)
(require 'notmuch)
(require 'notmuch-tree)
(require 'notmuch-show)
;; Moving messages around
(defvar jao-notmuch-mailboxes nil)
(defvar jao-notmuch-mailboxes-rx nil)
(defun jao-notmuch--path-to-mailbox (full-path)
(unless jao-notmuch-mailboxes-rx
(setq jao-notmuch-mailboxes-rx (regexp-opt jao-notmuch-mailboxes)))
(if (string-match jao-notmuch-mailboxes-rx full-path)
(match-string 0 full-path)
(user-error "Message not in any registered mailbox!")))
(defun jao-notmuch--msg-props ()
(if-let ((p (save-excursion
(beginning-of-line)
(text-property-search-forward :notmuch-message-properties))))
(prop-match-value p)
(user-error "No message at point")))
(defun jao-notmuch--full-path ()
(seq-find #'file-exists-p (plist-get (jao-notmuch--msg-props) :filename)))
(defun jao-notmuch--move (&optional full-path d)
(let* ((full-path (or full-path (jao-notmuch--full-path)))
(ff (jao-notmuch--path-to-mailbox full-path))
(d (or d (completing-read (format "From %s to: " ff)
(remove ff jao-notmuch-mailboxes) nil t)))
(dest (string-replace ff d full-path))
(dest (replace-regexp-in-string ",U=.+$" "m:2,S" dest))
(ftags (split-string ff "/"))
(ttags (split-string d "/")))
(when (y-or-n-p (format "%s -> %s? " ftags ttags))
(notmuch-tree-close-message-window)
(notmuch-tree-tag (append (notmuch-tag-change-list ftags t)
(notmuch-tag-change-list ttags)))
(rename-file (jao-notmuch--full-path) dest)
(shell-command-to-string "notmuch new")
(notmuch-refresh-this-buffer))))
(defun jao-notmuch-move-message ()
"Move message at point to another folder."
(interactive)
(jao-notmuch--move))
;; Targetting the displayed message from the tree view
(defvar-local jao-notmuch--tree-buffer nil)
(defun jao-notmuch-goto-message-buffer (&optional and-click)
(interactive "P")
(when (window-live-p notmuch-tree-message-window)
(let ((b (current-buffer)))
(select-window notmuch-tree-message-window)
(setq-local jao-notmuch--tree-buffer b)
(or (not and-click)
(cond ((eww--url-at-point) (shr-browse-url) 'url)
((button-at (point)) (push-button) 'button))))))
(defun jao-notmuch-click-message-buffer ()
(interactive)
(let ((b (current-buffer)))
(unless (eq 'url (jao-notmuch-goto-message-buffer t))
(pop-to-buffer b))))
(defun jao-notmuch-goto-tree-buffer ()
(interactive)
(if (buffer-live-p jao-notmuch--tree-buffer)
(pop-to-buffer jao-notmuch--tree-buffer)
(user-error "No tree view for this buffer")))
(defun jao-notmuch-browse-urls ()
(interactive)
(when (or (derived-mode-p 'notmuch-show-mode)
(jao-notmuch-goto-message-buffer))
(notmuch-show-browse-urls)))
(defun jao-notmuch-toggle-mime-parts ()
(interactive)
(when (jao-notmuch-goto-message-buffer)
(goto-char (point-min))
(let ((notmuch-show-text/html-blocked-images nil)
(shr-inhibit-images nil)
(shr-blocked-images nil))
(save-excursion
(when (re-search-forward "\\[ multipart/alternative \\]" nil t)
(while (forward-button 1 nil nil t)
(notmuch-show-toggle-part-invisibility)))))
(jao-notmuch-goto-tree-buffer)))
(defun jao-notmuch-toggle-images ()
(interactive)
(save-window-excursion
(jao-notmuch-goto-message-buffer)
(when (derived-mode-p 'notmuch-show-mode)
(let ((notmuch-show-text/html-blocked-images nil)
(shr-inhibit-images nil)
(shr-blocked-images nil))
(notmuch-refresh-this-buffer)))))
;; Keeping track of unread messages in current tree view
(defvar-local jao-notmuch--query-name nil)
(defun jao-notmuch--query-name ()
(when notmuch-tree-basic-query
(or jao-notmuch--query-name
(setq jao-notmuch--query-name
(let ((q (seq-find (lambda (q)
(string= (or (plist-get q :query) "")
notmuch-tree-basic-query))
notmuch-saved-searches)))
(or (plist-get q :name) notmuch-tree-basic-query))))))
(defun jao-notmuch--unread-count ()
(save-excursion
(goto-char (point-min))
(let ((p) (cnt) (total))
(while (setq p (text-property-search-forward :notmuch-message-properties))
(unless cnt (setq cnt 0 total 0))
(let ((tags (plist-get (prop-match-value p) :tags)))
(setq total (1+ total))
(when (or (member "unread" tags) (member "new" tags))
(setq cnt (1+ cnt)))))
(when cnt (format "%s out of %s messages left" cnt total)))))
(defun jao-notmuch--tree-update-buffer-name (&optional n)
(when-let ((n (or n (jao-notmuch--unread-count))))
(rename-buffer (format "{%s - %s}" (jao-notmuch--query-name) n))
(jao-minibuffer-refresh)))
(defun jao-notmuch--tree-sentinel (proc &rest _)
(let ((buffer (process-buffer proc))
(status (process-status proc)))
(when (and (eq status 'exit) (buffer-live-p buffer))
(with-current-buffer buffer (jao-notmuch--tree-update-buffer-name)))))
(advice-add 'notmuch-tree-process-sentinel :after #'jao-notmuch--tree-sentinel)
(defun jao-notmuch-echo-count ()
"Show the number of unread messages left in this tree view."
(interactive)
(when-let ((n (jao-notmuch--unread-count)))
(jao-notmuch--tree-update-buffer-name n)
(message n)))
(defun jao-notmuch-tree-next (thread &optional no-exit)
"Next message or thread in forest or exit if none."
(interactive "P")
(if thread
(progn (notmuch-tree-next-thread)
(notmuch-tree-show-message nil))
(notmuch-tree-next-matching-message (not no-exit)))
(jao-notmuch--tree-update-buffer-name))
;; Tagging
(defun jao-notmuch-tag-jump-and-next (reverse)
(interactive "P")
(notmuch-tag-jump reverse)
(jao-notmuch-tree-next nil t))
(defun jao-notmuch-tree--tag-and-next (tags reverse whole-thread)
(let ((c (notmuch-tag-change-list tags reverse)))
(if whole-thread (notmuch-tree-tag-thread c) (notmuch-tree-tag c)))
(jao-notmuch-tree-next whole-thread t))
(defun jao-notmuch-tree-delete-message (undelete)
(interactive "P")
(jao-notmuch-tree--tag-and-next '("+deleted" "-new" "-unread") undelete nil))
(defun jao-notmuch-tree-delete-thread ()
(interactive)
(jao-notmuch-tree--tag-and-next '("+deleted" "-new" "-unread") nil t))
(defun jao-notmuch-tree-read-thread ()
(interactive)
(jao-notmuch-tree--tag-and-next '("-unread" "-new") nil t))
(defun jao-notmuch-tree-flag (unmark)
(interactive "P")
(let ((tags (if unmark '("-flagged") '("-unread" "-new" "-deleted" "+flagged"))))
(jao-notmuch-tree--tag-and-next tags nil nil)))
(defun jao-notmuch-tree-spam (unmark)
(interactive "P")
(let ((tags (if unmark '("-spam") '("-unread" "-new" "+spam"))))
(jao-notmuch-tree--tag-and-next tags nil nil)))
;; Scrolling the shown message
(defun jao-notmuch-tree-scroll-or-next ()
"Scroll or next message in forest or exit if none."
(interactive)
(if (notmuch-tree-scroll-message-window)
(notmuch-tree-next-matching-message t)
(when (not (window-live-p notmuch-tree-message-window))
(notmuch-tree-show-message nil)))
(jao-notmuch--tree-update-buffer-name))
(defun jao-notmuch-tree-show-or-scroll ()
"Show current message, or scroll it if visible."
(interactive)
(if (window-live-p notmuch-tree-message-window)
(scroll-other-window 1)
(notmuch-tree-show-message nil)
(jao-notmuch--tree-update-buffer-name)))
(provide 'jao-notmuch)
;;; jao-notmuch.el ends here
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