Mercurial > pidgin3 / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pidgin/gtkstyle.c	Wed Nov 29 20:40:36 2017 +0100
@@ -0,0 +1,70 @@
+/*
+ * @file gtkstyle.c 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
+ * 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
+ *
+ */
+#include "gtkstyle.h"
+
+/* Assume light mode */
+static gboolean dark_mode_cache = FALSE;
+
+gboolean
+pidgin_style_is_dark(GtkStyle *style) {
+	GdkColor bg;
+
+	if (!style) {
+		return dark_mode_cache;
+	}
+
+	bg = style->base[GTK_STATE_NORMAL];
+
+	if (bg.red != 0xFFFF || bg.green != 0xFFFF || bg.blue != 0xFFFF) {
+		dark_mode_cache =  ((int) bg.red + (int) bg.green + (int) bg.blue) < (65536 * 3 / 2);
+	}
+
+	return dark_mode_cache;
+}
+
+void
+pidgin_style_adjust_contrast(GtkStyle *style, GdkColor *color) {
+	if (pidgin_style_is_dark(style)) {
+		gdouble r, g, b, h, s, v;
+
+		r = ((gdouble) color->red) / 65535.0;
+		g = ((gdouble) color->green) / 65535.0;
+		b = ((gdouble) color->blue) / 65535.0;
+
+		gtk_rgb_to_hsv(r, g, b, &h, &s, &v);
+
+		v += 0.3;
+		v = v > 1.0 ? 1.0 : v;
+		s = 0.7;
+
+		gtk_hsv_to_rgb(h, s, v, &r, &g, &b);
+
+		color->red = (guint16) (r * 65535.0);
+		color->green = (guint16) (g * 65535.0);
+		color->blue = (guint16) (b * 65535.0);
+	}
+}