.emacs.d/site-lisp/mode-icons.el

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+;;; mode-icons.el --- Show icons for modes
+
+;; Copyright (C) 2012  Tom Willemsen
+
+;; Author: Tom Willemsen <thomas@aethon.nl>
+;; Keywords: multimedia
+
+;; 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/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+(defun mode-icons-get-icon-file (name)
+  (concat user-emacs-directory "/icons/" name))
+
+(defvar mode-icons
+  `(("Emacs-Lisp" . (image :type xpm
+                           :file ,(mode-icons-get-icon-file "emacs.xpm")
+                           :ascent center))
+    ("Python" . (image :type xpm
+                       :file ,(mode-icons-get-icon-file "python.xpm")
+                       :ascent center))
+    ("Scheme" . (image :type xpm
+                       :file ,(mode-icons-get-icon-file "scheme.xpm")
+                       :ascent center))
+    ("Lisp" . (image :type xpm
+                     :file ,(mode-icons-get-icon-file "cl.xpm")
+                     :ascent center))
+    ("PHP" . (image :type xpm
+                    :file ,(mode-icons-get-icon-file "php.xpm")
+                    :ascent center)))
+  "Icons for major modes.")
+
+(defun set-mode-icon (mode)
+  (let ((icon-spec (assoc mode mode-icons)))
+    (if icon-spec
+        (setq mode-name (propertize mode-name 'display (cdr icon-spec))))))
+
+(defun set-current-mode-icon ()
+  (set-mode-icon mode-name))
+
+(add-hook 'after-change-major-mode-hook 'set-current-mode-icon)
+
+(provide 'mode-icons)
+;;; mode-icons.el ends here