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Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
338 lines
11 KiB
EmacsLisp
338 lines
11 KiB
EmacsLisp
;;; gnus-fun.el --- various frivolous extension functions to Gnus
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;; Copyright (C) 2002-2017 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(eval-when-compile
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(require 'cl))
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(require 'mm-util)
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(require 'gnus-util)
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(require 'gnus)
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(defvar gnus-face-properties-alist)
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(defcustom gnus-x-face-directory (expand-file-name "x-faces" gnus-directory)
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"Directory where X-Face PBM files are stored."
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:version "22.1"
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:group 'gnus-fun
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:type 'directory)
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(defcustom gnus-x-face-omit-files nil
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"Regexp to match faces in `gnus-x-face-directory' to be omitted."
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:version "25.1"
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:group 'gnus-fun
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:type '(choice (const nil) string))
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(defcustom gnus-face-directory (expand-file-name "faces" gnus-directory)
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"Directory where Face PNG files are stored."
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:version "25.1"
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:group 'gnus-fun
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:type 'directory)
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(defcustom gnus-face-omit-files nil
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"Regexp to match faces in `gnus-face-directory' to be omitted."
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:version "25.1"
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:group 'gnus-fun
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:type '(choice (const nil) string))
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(defcustom gnus-convert-pbm-to-x-face-command "pbmtoxbm %s | compface"
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"Command for converting a PBM to an X-Face."
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:version "22.1"
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:group 'gnus-fun
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:type 'string)
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(defcustom gnus-convert-image-to-x-face-command
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"convert -scale 48x48! %s xbm:- | xbm2xface.pl"
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"Command for converting an image to an X-Face.
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The command must take a image filename (use \"%s\") as input.
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The output must be the X-Face header data on stdout."
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:version "22.1"
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:group 'gnus-fun
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:type '(choice (const :tag "giftopnm, netpbm (GIF input only)"
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"giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface")
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(const :tag "convert"
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"convert -scale 48x48! %s xbm:- | xbm2xface.pl")
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(string)))
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(defcustom gnus-convert-image-to-face-command
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"convert -scale 48x48! %s -colors %d png:-"
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"Command for converting an image to a Face.
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The command must take an image filename (first format argument
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\"%s\") and the number of colors (second format argument: \"%d\")
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as input. The output must be the Face header data on stdout in
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PNG format."
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:version "22.1"
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:group 'gnus-fun
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:type '(choice (const :tag "djpeg, netpbm (JPG input only)"
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"djpeg %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant %d | pnmtopng")
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(const :tag "convert"
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"convert -scale 48x48! %s -colors %d png:-")
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(string)))
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(defun gnus-shell-command-to-string (command)
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"Like `shell-command-to-string' except not mingling ERROR."
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(with-output-to-string
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(call-process shell-file-name nil (list standard-output nil)
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nil shell-command-switch command)))
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;;;###autoload
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(defun gnus--random-face-with-type (dir ext omit fun)
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"Return file from DIR with extension EXT, omitting matches of OMIT, processed by FUN."
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(when (file-exists-p dir)
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(let* ((files
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(remove nil (mapcar
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(lambda (f) (unless (string-match (or omit "^$") f) f))
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(directory-files dir t ext))))
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(file (nth (random (length files)) files)))
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(when file
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(funcall fun file)))))
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;;;###autoload
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(autoload 'message-goto-eoh "message" nil t)
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(autoload 'message-insert-header "message" nil t)
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(defun gnus--insert-random-face-with-type (fun type)
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"Get a random face using FUN and insert it as a header TYPE.
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For instance, to insert an X-Face use `gnus-random-x-face' as FUN
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and \"X-Face\" as TYPE."
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(let ((data (funcall fun)))
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(save-excursion
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(if data
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(progn (message-goto-eoh)
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(insert type ": " data "\n"))
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(message
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"No face returned by the function %s." (symbol-name fun))))))
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;;;###autoload
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(defun gnus-random-x-face ()
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"Return X-Face header data chosen randomly from `gnus-x-face-directory'.
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Files matching `gnus-x-face-omit-files' are not considered."
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(interactive)
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(gnus--random-face-with-type gnus-x-face-directory "\\.pbm$" gnus-x-face-omit-files
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(lambda (file)
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(gnus-shell-command-to-string
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(format gnus-convert-pbm-to-x-face-command
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(shell-quote-argument file))))))
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;;;###autoload
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(defun gnus-insert-random-x-face-header ()
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"Insert a random X-Face header from `gnus-x-face-directory'."
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(interactive)
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(gnus--insert-random-face-with-type 'gnus-random-x-face 'X-Face))
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;;;###autoload
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(defun gnus-x-face-from-file (file)
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"Insert an X-Face header based on an image FILE.
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Depending on `gnus-convert-image-to-x-face-command' it may accept
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different input formats."
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(interactive "fImage file name: ")
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(when (file-exists-p file)
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(gnus-shell-command-to-string
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(format gnus-convert-image-to-x-face-command
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(shell-quote-argument (expand-file-name file))))))
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;;;###autoload
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(defun gnus-face-from-file (file)
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"Return a Face header based on an image FILE.
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Depending on `gnus-convert-image-to-face-command' it may accept
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different input formats."
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(interactive "fImage file name: ")
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(when (file-exists-p file)
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(let ((done nil)
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(attempt "")
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(quant 16))
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(while (and (not done)
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(> quant 1))
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(setq attempt
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(let ((coding-system-for-read 'binary))
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(gnus-shell-command-to-string
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(format gnus-convert-image-to-face-command
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(shell-quote-argument (expand-file-name file))
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quant))))
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(if (> (length attempt) 726)
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(progn
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(setq quant (- quant (if (< quant 10) 1 2)))
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(gnus-message 9 "Length %d; trying quant %d"
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(length attempt) quant))
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(setq done t)))
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(if done
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(mm-with-unibyte-buffer
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(insert attempt)
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(gnus-face-encode))
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nil))))
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(defun gnus-face-encode ()
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(let ((step 72))
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(base64-encode-region (point-min) (point-max))
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(goto-char (point-min))
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(while (search-forward "\n" nil t)
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(replace-match ""))
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(goto-char (point-min))
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(while (> (- (point-max) (point))
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step)
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(forward-char step)
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(insert "\n ")
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(setq step 76))
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(buffer-string)))
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;;;###autoload
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(defun gnus-convert-face-to-png (face)
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"Convert FACE (which is base64-encoded) to a PNG.
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The PNG is returned as a string."
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(mm-with-unibyte-buffer
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(insert face)
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(ignore-errors
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(base64-decode-region (point-min) (point-max)))
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(buffer-string)))
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;;;###autoload
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(defun gnus-convert-png-to-face (file)
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"Convert FILE to a Face.
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FILE should be a PNG file that's 48x48 and smaller than or equal to
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726 bytes."
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(mm-with-unibyte-buffer
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(insert-file-contents file)
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(when (> (buffer-size) 726)
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(error "The file is %d bytes long, which is too long"
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(buffer-size)))
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(gnus-face-encode)))
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;;;###autoload
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(defun gnus-random-face ()
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"Return randomly chosen Face from `gnus-face-directory'.
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Files matching `gnus-face-omit-files' are not considered."
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(interactive)
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(gnus--random-face-with-type gnus-face-directory "\\.png$"
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gnus-face-omit-files
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'gnus-convert-png-to-face))
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;;;###autoload
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(defun gnus-insert-random-face-header ()
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"Insert a random Face header from `gnus-face-directory'."
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(gnus--insert-random-face-with-type 'gnus-random-face 'Face))
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(defface gnus-x-face '((t (:foreground "black" :background "white")))
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"Face to show X-Face.
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The colors from this face are used as the foreground and background
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colors of the displayed X-Faces."
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:group 'gnus-article-headers)
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(declare-function article-narrow-to-head "gnus-art" ())
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(declare-function gnus-article-goto-header "gnus-art" (header))
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(declare-function gnus-add-image "gnus-art" (category image))
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(declare-function gnus-add-wash-type "gnus-art" (type))
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(defun gnus-display-x-face-in-from (data)
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"Display the X-Face DATA in the From header."
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(require 'gnus-art)
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(let (pbm)
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(when (or (gnus-image-type-available-p 'xface)
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(and (gnus-image-type-available-p 'pbm)
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(setq pbm (uncompface data))))
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(save-excursion
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(save-restriction
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(article-narrow-to-head)
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(gnus-article-goto-header "from")
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(when (bobp)
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(insert "From: [no 'from' set]\n")
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(forward-char -17))
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(gnus-add-image
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'xface
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(gnus-put-image
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(if (gnus-image-type-available-p 'xface)
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(apply 'gnus-create-image (concat "X-Face: " data) 'xface t
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(cdr (assq 'xface gnus-face-properties-alist)))
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(apply 'gnus-create-image pbm 'pbm t
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(cdr (assq 'pbm gnus-face-properties-alist))))
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nil 'xface))
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(gnus-add-wash-type 'xface))))))
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(defun gnus-grab-cam-x-face ()
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"Grab a picture off the camera and make it into an X-Face."
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(interactive)
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(shell-command "xawtv-remote snap ppm")
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(let ((file nil))
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(while (null (setq file (directory-files "/tftpboot/sparky/tmp"
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t "snap.*ppm")))
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(sleep-for 1))
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(setq file (car file))
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(with-temp-buffer
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(shell-command
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(format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | ppmnorm 2>/dev/null | pnmscale -width 48 | ppmtopgm | pgmtopbm -threshold -value 0.92 | pbmtoxbm | compface"
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file)
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(current-buffer))
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;;(sleep-for 3)
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(delete-file file)
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(buffer-string))))
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(defun gnus-grab-cam-face ()
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"Grab a picture off the camera and make it into an X-Face."
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(interactive)
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(shell-command "xawtv-remote snap ppm")
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(let ((file nil)
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(tempfile (make-temp-file "gnus-face-" nil ".ppm"))
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result)
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(while (null (setq file (directory-files "/tftpboot/sparky/tmp"
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t "snap.*ppm")))
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(sleep-for 1))
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(setq file (car file))
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(shell-command
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(format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | pnmscale -width 48 -height 48 | ppmtopgm >> %s"
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file tempfile))
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(let ((gnus-convert-image-to-face-command
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(format "cat '%%s' | ppmquant %%d | ppmchange %s | pnmtopng"
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(gnus-fun-ppm-change-string))))
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(setq result (gnus-face-from-file tempfile)))
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(delete-file file)
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;;(delete-file tempfile) ; FIXME why are we not deleting it?!
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result))
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(defun gnus-fun-ppm-change-string ()
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(let* ((possibilities '("%02x0000" "00%02x00" "0000%02x"
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"%02x%02x00" "00%02x%02x" "%02x00%02x"))
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(format (concat "'#%02x%02x%02x' '#"
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(nth (random 6) possibilities)
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"'"))
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(values nil))
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(dotimes (i 255)
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(push (format format i i i i i i)
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values))
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(mapconcat 'identity values " ")))
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(defun gnus-funcall-no-warning (function &rest args)
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(when (fboundp function)
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(apply function args)))
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(provide 'gnus-fun)
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;;; gnus-fun.el ends here
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