90 lines
3.1 KiB
EmacsLisp
90 lines
3.1 KiB
EmacsLisp
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;;; buffer-bg.el --- Changing background color of windows
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;;
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;; Author: Lennart Borgman (lennart O borgman A gmail O com)
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;; Created: 2008-05-22T19:06:23+0200 Thu
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;; Version: 0.5
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;; Last-Updated: 2008-05-22T23:19:55+0200 Thu
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;; URL: http://www.emacswiki.org/cgi-bin/wiki/buffer-bg.el
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;; Keywords:
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;; Compatibility:
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;;
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;; Features that might be required by this library:
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;;
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;; None
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Commentary:
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;;
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;; There is currently no way to change background colors of Emacs
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;; windows. This library implements a workaround using overlays.
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Change log:
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;;
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or
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;; (at your option) any later version.
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;;
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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 GNU
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;; General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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;; Floor, Boston, MA 02110-1301, USA.
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Code:
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(defvar buffer-bg-overlay nil)
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(put 'buffer-bg-overlay 'permanent-local t)
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;;;###autoload
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(defun buffer-bg-set-color (color buffer)
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"Add an overlay with background color COLOR to buffer BUFFER.
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If COLOR is nil remove previously added overlay."
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(interactive
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(let* ((prompt (if buffer-bg-overlay
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"Background color (empty string to remove): "
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"Background color: "))
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(color (read-color prompt nil t)))
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(when (= 0 (length color))
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(setq color nil))
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(list color (current-buffer))
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))
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(if (not color)
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(when buffer-bg-overlay
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(delete-overlay buffer-bg-overlay)
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(setq buffer-bg-overlay nil))
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(save-restriction
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(widen)
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(setq buffer-bg-overlay
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(make-overlay (point-min) (point-max) nil nil t))
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;; Fix-me: Let the overlay have priority 0 which is the
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;; lowest. Change this to below char properties if this is ever
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;; allowed in Emacs.
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(overlay-put buffer-bg-overlay 'priority 0)
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(let* ((bg-face (list :background color))
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(bg-after (propertize (make-string 10 ?\n)
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'face bg-face
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'intangible t)))
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(overlay-put buffer-bg-overlay 'face bg-face)
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;; This is just confusing, don't use it:
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;;(overlay-put buffer-bg-overlay 'after-string bg-after)
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)
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)))
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(provide 'buffer-bg)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; buffer-bg.el ends here
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