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|
;;; my-gnus.el -- Email related extensions for emacs core -*- lexical-binding: t -*-
;; Copyright (C) 2023 Free Software Foundation.
;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "28.2"))
;; This file is part of dotfiles.
;; dotfiles is free software: you can redistribute it and/or modify it under
;; the terms of the GNU Affero General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; dotfiles 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 Affero General
;; Public License for more details.
;; You should have received a copy of the GNU Affero General Public
;; License along with dotfiles. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Email related extensions for emacs core. Covers gnus, message mode etc.
;;; Code:
;;; `message-mode', the mode to compose messages
(defun my-message-elide-remaining ()
"Elide all cited text after point."
(interactive)
(when-let* ((beg (point))
(citexp (concat "^\\("
(concat message-yank-cited-prefix "\\|")
message-yank-prefix
"\\)"))
(end (save-excursion
(goto-char (point-max))
(when (re-search-backward citexp nil t)
(beginning-of-line 2)
(point)))))
(when (< beg end) (message-elide-region beg end))))
(defun my-message-remove-trailing-cited-lines ()
"Remove all trailing cited lines."
(interactive)
(save-excursion
(when-let* ((citexp (concat "^\\("
(concat message-yank-cited-prefix "\\|")
message-yank-prefix
"\\)+ *\n"))
(end (progn
(goto-char (point-max))
(when (re-search-backward citexp nil t)
(beginning-of-line 2)
(point))))
(beg (progn (beginning-of-line 0)
(while (looking-at-p citexp)
(beginning-of-line 0))
(beginning-of-line 2)
(point))))
(when (< beg end) (delete-region beg end)))))
(defun my-message-before-previous-cited ()
"Move point to before previous cited portion."
(interactive)
(let ((citexp (concat "^\\("
(concat message-yank-cited-prefix "\\|")
message-yank-prefix
"\\)")))
(beginning-of-line 1)
(unless (looking-at-p citexp)
(re-search-backward citexp nil t))
(beginning-of-line 0)
(while (looking-at-p citexp)
(beginning-of-line 0))))
(defun my-message-after-next-cited ()
"Move point to after the next cited portion."
(interactive)
(let ((citexp (concat "^\\("
(concat message-yank-cited-prefix "\\|")
message-yank-prefix
"\\)")))
(beginning-of-line 1)
(unless (looking-at-p citexp)
(re-search-forward citexp nil t))
(beginning-of-line 2)
(while (looking-at-p citexp)
(beginning-of-line 2))))
(defun my-gnus-summary-exit-like-mu4e () (interactive)
(if (get-buffer-window (gnus-buffer-live-p gnus-article-buffer))
(gnus-summary-expand-window)
(gnus-summary-exit)))
(defun my-gnus-summary-next-article-like-mu4e () (interactive)
(if (get-buffer-window (gnus-buffer-live-p gnus-article-buffer))
(gnus-summary-next-article)
(next-line)))
(defun my-gnus-summary-prev-article-like-mu4e () (interactive)
(if (get-buffer-window (gnus-buffer-live-p gnus-article-buffer))
(gnus-summary-prev-article)
(previous-line)))
(defun my-gnus-topic-select-group (arg)
(interactive "P")
(if arg (gnus-topic-select-group t)
(gnus-topic-select-group 200)))
(defun my-gnus-move-article-like-mu4e ()
(interactive)
(call-interactively 'gnus-summary-move-article)
(my-gnus-summary-next-article-like-mu4e))
(defvar my-gnus-group-default-targets
'((archive . "Archive") (trash . "Trash")))
(defvar my-gnus-group-alist `((".*" . ,my-gnus-group-default-targets))
"Alist of information about groups such as archive and trash
targets. Later entries override earlier ones")
(defun my-gnus-refile-article-like-mu4e (key)
"Refile an article and move to the next, just like in mu4e.
The archiving target comes from `my-gnus-group-alist'.
KEY is either 'archive or 'trash."
(interactive)
(let ((target
(alist-get key my-gnus-group-default-targets))
(new-group-name))
(pcase-dolist (`(,re . ,info) my-gnus-group-alist)
(when (and (string-match re gnus-newsgroup-name)
(alist-get key info))
(setq target (alist-get key info))))
(setq new-group-name
(replace-regexp-in-string
"/.*"
(concat "/" target)
gnus-newsgroup-name))
(gnus-summary-move-article 1 new-group-name)
(my-gnus-summary-next-article-like-mu4e)))
(defun my-gnus-archive-article-like-mu4e ()
"Archive an article and move to the next, just like in mu4e.
The archiving target comes from `my-gnus-group-alist'."
(interactive)
(my-gnus-refile-article-like-mu4e 'archive))
(defun my-gnus-trash-article-like-mu4e ()
(interactive)
(my-gnus-refile-article-like-mu4e 'trash))
(defun my-org-open-gnus-link (link)
(my-select-new-window-matching-mode 'gnus-summary-mode)
(org-gnus-open link t))
(defvar my-gnus-inbox-group nil
"The default inbox to be opened with `my-gnus-open-inbox'.")
(defun my-gnus-open-inbox ()
(interactive)
(gnus-group-read-group t t my-gnus-inbox-group))
(defun my-gnus-start ()
(interactive)
(let ((buffer (get-buffer "*Group*")))
(if buffer
(switch-to-buffer "*Group*")
(gnus))))
(defun my-gnus-topic-up ()
(interactive)
(gnus-topic-jump-to-topic (gnus-current-topic)))
(defun my-gnus-group-compose ()
(interactive) (gnus-group-mail '(4)))
(defun my-gnus-group-get-new-news-quietly ()
(interactive)
(let ((inhibit-message t))
(gnus-group-get-new-news)))
;; override `mm-display-external'
;; Removed the following nonsensical part
;; ;; So that we pop back to the right place, sort of.
;; (switch-to-buffer gnus-summary-buffer)
(defun my-mm-display-external (handle method)
"Display HANDLE using METHOD."
(let ((outbuf (current-buffer)))
(mm-with-unibyte-buffer
(if (functionp method)
(let ((cur (current-buffer)))
(if (eq method 'mailcap-save-binary-file)
(progn
(set-buffer (generate-new-buffer " *mm*"))
(setq method nil))
(mm-insert-part handle)
(mm-add-meta-html-tag handle)
(let ((win (get-buffer-window cur t)))
(when win
(select-window win)))
(switch-to-buffer (generate-new-buffer " *mm*")))
(buffer-disable-undo)
(set-buffer-file-coding-system mm-binary-coding-system)
(insert-buffer-substring cur)
(goto-char (point-min))
(when method
(message "Viewing with %s" method))
(let ((mm (current-buffer))
(attachment-filename (mm-handle-filename handle))
(non-viewer (assq 'non-viewer
(mailcap-mime-info
(mm-handle-media-type handle) t))))
(unwind-protect
(if method
(progn
(when (and (boundp 'gnus-summary-buffer)
(buffer-live-p gnus-summary-buffer))
(when attachment-filename
(with-current-buffer mm
(rename-buffer
(format "*mm* %s" attachment-filename) t)))
;; ;; So that we pop back to the right place, sort of.
;; (switch-to-buffer gnus-summary-buffer)
(switch-to-buffer mm))
(funcall method))
(mm-save-part handle))
(when (and (not non-viewer)
method)
(mm-handle-set-undisplayer handle mm)))))
;; The function is a string to be executed.
(mm-insert-part handle)
(mm-add-meta-html-tag handle)
;; We create a private sub-directory where we store our files.
(let* ((dir (with-file-modes #o700
(make-temp-file
(expand-file-name "emm." mm-tmp-directory) 'dir)))
(filename (or
(mail-content-type-get
(mm-handle-disposition handle) 'filename)
(mail-content-type-get
(mm-handle-type handle) 'name)))
(mime-info (mailcap-mime-info
(mm-handle-media-type handle) t))
(needsterm (or (assoc "needsterm" mime-info)
(assoc "needsterminal" mime-info)))
(copiousoutput (assoc "copiousoutput" mime-info))
file buffer)
(if filename
(setq file (expand-file-name
(gnus-map-function mm-file-name-rewrite-functions
(file-name-nondirectory filename))
dir))
;; Use nametemplate (defined in RFC1524) if it is specified
;; in mailcap.
(let ((suffix (cdr (assoc "nametemplate" mime-info))))
(if (and suffix
(string-match "\\`%s\\(\\..+\\)\\'" suffix))
(setq suffix (match-string 1 suffix))
;; Otherwise, use a suffix according to
;; `mailcap-mime-extensions'.
(setq suffix (car (rassoc (mm-handle-media-type handle)
mailcap-mime-extensions))))
(setq file (with-file-modes #o600
(make-temp-file (expand-file-name "mm." dir)
nil suffix)))))
(let ((coding-system-for-write mm-binary-coding-system))
(write-region (point-min) (point-max) file nil 'nomesg))
;; The file is deleted after the viewer exists. If the users edits
;; the file, changes will be lost. Set file to read-only to make it
;; clear.
(set-file-modes file #o400 'nofollow)
(message "Viewing with %s" method)
(cond
(needsterm
(let ((command (mm-mailcap-command
method file (mm-handle-type handle))))
(unwind-protect
(if window-system
(set-process-sentinel
(start-process "*display*" nil
mm-external-terminal-program
"-e" shell-file-name
shell-command-switch command)
(lambda (process _state)
(if (eq 'exit (process-status process))
(run-at-time
60.0 nil
(lambda ()
(ignore-errors (delete-file file))
(ignore-errors (delete-directory
(file-name-directory
file))))))))
(require 'term)
(require 'gnus-win)
(set-buffer
(setq buffer
(make-term "display"
shell-file-name
nil
shell-command-switch command)))
(term-mode)
(term-char-mode)
(set-process-sentinel
(get-buffer-process buffer)
(let ((wc gnus-current-window-configuration))
(lambda (process _state)
(when (eq 'exit (process-status process))
(ignore-errors (delete-file file))
(ignore-errors
(delete-directory (file-name-directory file)))
(gnus-configure-windows wc)))))
(gnus-configure-windows 'display-term))
(mm-handle-set-external-undisplayer handle (cons file buffer))
(add-to-list 'mm-temp-files-to-be-deleted file t))
(message "Displaying %s..." command))
'external)
(copiousoutput
(with-current-buffer outbuf
(forward-line 1)
(mm-insert-inline
handle
(unwind-protect
(progn
(call-process shell-file-name nil
(setq buffer
(generate-new-buffer " *mm*"))
nil
shell-command-switch
(mm-mailcap-command
method file (mm-handle-type handle)))
(if (buffer-live-p buffer)
(with-current-buffer buffer
(buffer-string))))
(progn
(ignore-errors (delete-file file))
(ignore-errors (delete-directory
(file-name-directory file)))
(ignore-errors (kill-buffer buffer))))))
'inline)
(t
;; Deleting the temp file should be postponed for some wrappers,
;; shell scripts, and so on, which might exit right after having
;; started a viewer command as a background job.
(let ((command (mm-mailcap-command
method file (mm-handle-type handle))))
(unwind-protect
(let ((process-connection-type nil))
(start-process "*display*"
(setq buffer
(generate-new-buffer " *mm*"))
shell-file-name
shell-command-switch command)
(set-process-sentinel
(get-buffer-process buffer)
(lambda (process _state)
(when (eq (process-status process) 'exit)
(run-at-time
60.0 nil
(lambda ()
(ignore-errors (delete-file file))
(ignore-errors (delete-directory
(file-name-directory file)))))
(when (buffer-live-p outbuf)
(with-current-buffer outbuf
(let ((buffer-read-only nil)
(point (point)))
(forward-line 2)
(let ((start (point)))
(mm-insert-inline
handle (with-current-buffer buffer
(buffer-string)))
(put-text-property start (point)
'face 'mm-command-output))
(goto-char point))))
(when (buffer-live-p buffer)
(kill-buffer buffer)))
(message "Displaying %s...done" command))))
(mm-handle-set-external-undisplayer
handle (cons file buffer))
(add-to-list 'mm-temp-files-to-be-deleted file t))
(message "Displaying %s..." command))
'external)))))))
(defun my-gnus-article-copy-region (beg end)
"Copy an gnus article region from beginning to end, links included."
(interactive "r")
(let ((pairs)
(copied (buffer-substring-no-properties beg end))
(inhibit-message t))
(save-excursion
(goto-char beg)
(when-let* ((button (button-at (point)))
(url (button-get button 'shr-url)))
(push (cons (buffer-substring-no-properties
(button-start button)
(button-end button))
url)
pairs))
(while (and (shr-next-link)
(<= (point) end)
(button-at (point)))
(let ((button (button-at (point))))
(push (cons (buffer-substring-no-properties
(button-start button)
(button-end button))
(button-get button 'shr-url))
pairs)))
(pcase-dolist (`(,label . ,url) (reverse pairs))
(setq copied
(concat copied
(format "[%s] %s\n" label url)))))
(kill-new copied)
(setq deactivate-mark t)
(let ((inhibit-message nil))
(message "Copied region with %d links." (length pairs)))))
(provide 'my-gnus)
;;; my-gnus.el ends here
|
