89 lines
2.7 KiB
EmacsLisp
89 lines
2.7 KiB
EmacsLisp
;;; transparency.el --- a viewing mode for books and novels. -*- lexical-binding: t; -*-
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;; Copyright (C) 2019 Robert Rose
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;; Author: Robert Rose <overclucker@gmail.com>
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;; Keywords: lisp eww novel book
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;; Version: 0.0.1
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;; Package-Requires ((emacs "24"))
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;; This program 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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;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Toggles transparency on and off with `transparency-toggle'. Customize how it looks in `transparency'
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;; custom group.
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;;; Code:
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(defvar transparency-state nil
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"Reflects the current state of transparency.")
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(defvar transparency-original-faces '()
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"Stores original faces while transparency is enable.")
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(defgroup transparency nil
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"Custom group for transparency package.")
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(defcustom transparency-alpha 50
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"The level of transparency used."
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:type 'integer
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:group 'transparency)
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(defcustom transparency-faces
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'((default :background "#444")
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(default :foreground "grey75")
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(fringe :background "#444")
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(mode-line :background "#444")
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(mode-line :foreground "grey75")
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(mode-line :box nil)
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(mode-line-inactive :background "#444")
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(mode-line-inactive :foreground "grey50")
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(mode-line-inactive :box nil))
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"Faces used when transparency is enabled."
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:type '(alist face)
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:group 'transparency)
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(setq alpha-prop (if (>= emacs-major-version 29)
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'alpha-background
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'alpha))
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(defun transparency-modface (FPV)
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"Sets new and returns old FPV"
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(let* ((face (pop FPV))
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(prop (pop FPV))
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(val (pop FPV))
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(prev (face-attribute face prop)))
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(set-face-attribute face nil prop val)
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`(,face ,prop ,prev)))
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(defun transparency-toggle ()
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"better alpha toggle transparency"
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(interactive)
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(if transparency-state
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(progn
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(set-frame-parameter nil alpha-prop 100)
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;; (set-frame-parameter nil 'alpha-background 100)
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(mapcar 'transparency-modface transparency-original-faces)
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(setq transparency-state nil))
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(set-frame-parameter nil alpha-prop transparency-alpha)
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(setq transparency-original-faces
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(mapcar 'transparency-modface transparency-faces))
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(setq transparency-state t)))
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(provide 'transparency)
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;;; transparency.el ends here
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