Implemented sc_rotate

config.c

@@ -11,11 +11,13 @@ config_load_default(void)
   if (!Zathura.UI.session)
     return;
 
+  int int_value = 0;
+
   /* general settings */
   girara_mode_set(Zathura.UI.session, NORMAL);
 
   /* zathura settings */
-  int int_value = 10;
+  int_value = 10;
   girara_setting_add(Zathura.UI.session, "zoom-step", &int_value, INT, false, "Zoom step", NULL);
 
   /* define default shortcuts */

shortcuts.c

@@ -133,6 +133,16 @@ sc_reload(girara_session_t* session, girara_argument_t* argument, unsigned int t
 bool
 sc_rotate(girara_session_t* session, girara_argument_t* argument, unsigned int t)
 {
+  if (session == NULL || Zathura.document == NULL) {
+    return false;
+  }
+
+  /* update rotate value */
+  Zathura.document->rotate  = (Zathura.document->rotate + 90) % 360;
+
+  /* render all pages again */
+  render_all();
+
   return false;
 }