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;; ---------------------------------------------------------------------
;; Copyright (C) 2020 - Nicolas .P Rougier
;; Copyright (C) 2020 - N Λ N O developers
;;
;; 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 <http://www.gnu.org/licenses/>.
;; ---------------------------------------------------------------------
;;
;; Note: The screen is not shown if there are opened file buffers. For
;; example, if you start emacs with a filename on the command
;; line, the splash screen is not shown.
;;
;; This is based on some combination of:
;; - https://github.com/rougier/nano-emacs
;; - https://github.com/rougier/emacs-splash
(require 'cl-lib)
(defun scratch-splash ()
"Emacs splash screen"
(interactive)
(let* ((splash-buffer (get-buffer-create "*splash*"))
(height (round (- (window-body-height nil) 1) ))
(width (round (window-body-width nil) ))
(padding-center (- (/ height 2) 1)))
;; If there are buffer associated with filenames,
;; we don't show the splash screen.
(if (eq 0 (length (cl-loop for buf in (buffer-list)
if (buffer-file-name buf)
collect (buffer-file-name buf))))
(with-current-buffer splash-buffer
(erase-buffer)
(setq-local line-spacing 0)
(setq-local vertical-scroll-bar nil)
(setq-local horizontal-scroll-bar nil)
(setq-local fill-column width)
(face-remap-add-relative 'link :underline nil)
(insert-char ?\n padding-center)
(insert-text-button " www.gnu.org "
'action (lambda (_) (browse-url "https://www.gnu.org"))
'help-echo "Visit www.gnu.org website"
'follow-link t)
(center-line) (insert "\n")
(insert (concat
(propertize "GNU Emacs" 'face 'bold)
" version "
(format "%d.%d" emacs-major-version emacs-minor-version)))
(center-line)
(read-only-mode t)
(display-buffer-same-window splash-buffer nil)
)
)))
(provide 'scratch-splash)
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