+static void
+twitch(Client *c, const Arg *arg) {
+ GtkAdjustment *a;
+ gdouble v;
+
+ a = gtk_scrolled_window_get_vadjustment(
+ GTK_SCROLLED_WINDOW(c->scroll));
+
+ v = gtk_adjustment_get_value(a);
+
+ v += arg->i;
+
+ v = MAX(v, 0.0);
+ v = MIN(v, gtk_adjustment_get_upper(a) -
+ gtk_adjustment_get_page_size(a));
+ gtk_adjustment_set_value(a, v);
+}
+
+static void
+togglescrollbars(Client *c, const Arg *arg) {
+ GtkPolicyType vspolicy;
+ Arg a;
+
+ gtk_scrolled_window_get_policy(GTK_SCROLLED_WINDOW(c->scroll), NULL, &vspolicy);
+
+ if(vspolicy == GTK_POLICY_AUTOMATIC) {
+ gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(c->scroll),
+ GTK_POLICY_NEVER, GTK_POLICY_NEVER);
+ } else {
+ gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(c->scroll),
+ GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+ a.i = +1;
+ twitch(c, &a);
+ a.i = -1;
+ twitch(c, &a);
+ }
+}
+