From http://www.jwz.org/xscreensaver/xscreensaver-5.30.tar.gz

[xscreensaver] / utils / resources.c

diff --git a/utils/resources.c b/utils/resources.c
index f02ab91f77ec9614d6808af1b6f4bca00581ff43..d95a103cd52e04fb6b6c5ba33e1d261741c5dd80 100644 (file)
--- a/utils/resources.c
+++ b/utils/resources.c
@@ -1,5 +1,4 @@
-/* xscreensaver, Copyright (c) 1992, 1997, 1998, 2001, 2003, 2006
- *  Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1992-2014 Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -263,3 +262,35 @@ get_minutes_resource (Display *dpy, char *res_name, char *res_class)
 {
   return get_time_resource (dpy, res_name, res_class, False);
 }
+
+
+/* A utility function for event-handler functions:
+   Returns True if the event is a simple click, Space, Tab, etc.
+   Returns False otherwise.
+   The idea here is that most hacks interpret to clicks or basic
+   keypresses as "change it up".
+
+   This isn't really the right file for this, but whatever.
+ */
+Bool
+screenhack_event_helper (Display *dpy, Window window, XEvent *event)
+{
+  if (event->xany.type == KeyPress)
+    {
+      KeySym keysym;
+      char c = 0;
+      XLookupString (&event->xkey, &c, 1, &keysym, 0);
+      if (c == ' ' || c == '\t' || c == '\r' || c == '\n' ||
+          keysym == XK_Left || keysym == XK_Right ||
+          keysym == XK_Up || keysym == XK_Down ||
+          keysym == XK_Prior || keysym == XK_Next)
+        return True;
+    }
+  else if (event->xany.type == ButtonPress)
+    {
+      if (event->xbutton.button == 1)
+        return True;
+    }
+
+  return False;
+}