diff -r 329cf2453fb8 -r 93c0cd117e1d pidgin/gtkstyle.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pidgin/gtkstyle.h	Wed Nov 29 20:40:36 2017 +0100
@@ -0,0 +1,59 @@
+/**
+ * @file gtkstyle.h GTK+ Style utility functions
+ * @ingroup pidgin
+ */
+
+/* pidgin
+ *
+ * Pidgin is the legal property of its developers, whose names are too numerous
+ * to list here.  Please refer to the COPYRIGHT file distributed with this
+ * source distribution.
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
+ */
+#ifndef _PIDGINSTYLE_H_
+#define _PIDGINSTYLE_H_
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+/*@{*/
+
+/**
+ * Returns TRUE if dark mode is enabled and foreground colours should be invertred
+ *
+ * @param style The GtkStyle in use, or NULL to use a cached version.
+ *
+ * @return @c TRUE if dark mode, @c FALSE otherwise
+ */
+
+gboolean pidgin_style_is_dark(GtkStyle *style);
+
+/**
+ * Lighten a color if dark mode is enabled.
+ *
+ * @param style The GtkStyle in use.
+ *
+ * @param color Color to be lightened. Transformed color will be written here.
+ */
+
+void pidgin_style_adjust_contrast(GtkStyle *style, GdkColor *color);
+
+/*@}*/
+
+G_END_DECLS
+
+#endif /* _PIDGINSTYLE_H_ */