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;;; gnus-gravatar.el --- Gnus Gravatar support -*- lexical-binding: t -*-
;; Copyright (C) 2010-2025 Free Software Foundation, Inc.
;; Author: Julien Danjou <julien@danjou.info>
;; Keywords: multimedia, news
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'gravatar)
(require 'gnus-art)
(require 'mail-extr) ;; Because of binding `mail-extr-disable-voodoo'.
(defgroup gnus-gravatar nil
"Gravatars in Gnus."
:link '(custom-group-link gravatar)
:group 'gnus-visual)
(defcustom gnus-gravatar-size nil
"Size in pixels at which gravatars should be displayed.
If nil, default to `gravatar-size'."
:type '(choice (const :tag "Default" nil)
(integer :tag "Pixels"))
:version "24.1")
(defcustom gnus-gravatar-properties '(:ascent center :relief 1)
"List of image properties applied to Gravatar images."
:type 'plist
:version "24.1")
(defcustom gnus-gravatar-too-ugly gnus-article-x-face-too-ugly
"Regexp matching posters whose avatar shouldn't be shown automatically.
If nil, show all avatars."
:type '(choice regexp (const :tag "Allow all" nil))
:version "24.1")
(defun gnus-gravatar-transform-address (header category &optional force)
(gnus-with-article-headers
(let* ((mail-extr-disable-voodoo t)
(mail-extr-ignore-realname-equals-mailbox-name nil)
(addresses (mail-extract-address-components
(or (mail-fetch-field header) "") t))
(gravatar-size (or gnus-gravatar-size gravatar-size))
name)
(dolist (address addresses)
(when (and (setq name (car address))
(string-match "\\` +" name))
(setcar address (setq name (substring name (match-end 0)))))
(when (or force
(not (and gnus-gravatar-too-ugly
(or (string-match gnus-gravatar-too-ugly
(or (cadr address) ""))
(and name
(string-match gnus-gravatar-too-ugly
name))))))
(ignore-errors
(gravatar-retrieve
(cadr address)
#'gnus-gravatar-insert
(list header address category))))))))
(defun gnus-gravatar-insert (gravatar header address category)
"Insert GRAVATAR for ADDRESS in HEADER in current article buffer.
Set image category to CATEGORY. This function is intended as a
callback for `gravatar-retrieve'."
(unless (eq gravatar 'error)
(gnus-with-article-buffer
;; The buffer can be gone at this time.
(when (buffer-live-p (current-buffer))
(let ((real-name (car address))
(mail-address (cadr address))
(mark (point-marker))
(case-fold-search t))
(save-restriction
(article-narrow-to-head)
(gnus-article-goto-header header)
(mail-header-narrow-to-field)
(when (if real-name
(re-search-forward
(concat (replace-regexp-in-string
"[\t ]+" "[\t\n ]+"
(regexp-quote real-name))
"\\|"
(regexp-quote mail-address))
nil t)
(search-forward mail-address nil t))
(goto-char (1- (match-beginning 0)))
;; If we're on the " quoting the name, go backward.
(when (looking-at-p "[\"<]")
(goto-char (1- (point))))
;; Do not do anything if there's already a gravatar.
;; This can happen if the buffer has been regenerated in
;; the mean time, for example we were fetching
;; someaddress, and then we change to another mail with
;; the same someaddress.
(unless (get-text-property (1- (point)) 'gnus-gravatar)
(let ((pos (point)))
(setq gravatar (append gravatar gnus-gravatar-properties))
(gnus-put-image gravatar (buffer-substring pos (1+ pos))
category)
(put-text-property pos (point) 'gnus-gravatar address)
(gnus-add-wash-type category)
(gnus-add-image category gravatar)))))
(goto-char mark))))))
;;;###autoload
(defun gnus-treat-from-gravatar (&optional force)
"Display gravatar in the From header.
If gravatar is already displayed, remove it."
(interactive "p" gnus-article-mode gnus-summary-mode)
(gnus-with-article-buffer
(if (memq 'from-gravatar gnus-article-wash-types)
(gnus-delete-images 'from-gravatar)
(gnus-gravatar-transform-address "from" 'from-gravatar force))))
;;;###autoload
(defun gnus-treat-mail-gravatar (&optional force)
"Display gravatars in the Cc and To headers.
If gravatars are already displayed, remove them."
(interactive "p" gnus-article-mode gnus-summary-mode)
(gnus-with-article-buffer
(if (memq 'mail-gravatar gnus-article-wash-types)
(gnus-delete-images 'mail-gravatar)
(gnus-gravatar-transform-address "cc" 'mail-gravatar force)
(gnus-gravatar-transform-address "to" 'mail-gravatar force))))
(provide 'gnus-gravatar)
;;; gnus-gravatar.el ends here
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