From: daniel watson <ozzloy@gmail.com>
Date: Sun, 31 Jul 2016 18:10:20 +0000 (-0700)
Subject: add notes on tracking screensaver command bug
X-Git-Url: http://challenge-bot.com/repos/?p=ozzloy%40gmail.com%2Foble;a=commitdiff_plain;h=4dbced6b2345ceb73e3eea66bf52d59e6092d9ba

add notes on tracking screensaver command bug
---

diff --git a/TODO b/TODO
index 420ae61..30890d8 100644
--- a/TODO
+++ b/TODO
@@ -9,3 +9,43 @@ FOR SCREENSAVER:
 	* track down bug
 		* compile gnome-screensaver
 
+http://coderrr.wordpress.com/2008/04/20/getting-idle-time-in-unix/#comment-1927
+in c:
+#include <X11/extensions/scrnsaver.h>
+
+main() {
+  XScreenSaverInfo *info = XScreenSaverAllocInfo();
+  Display *display = XOpenDisplay(0);
+
+  XScreenSaverQueryInfo(display, DefaultRootWindow(display), info);
+  printf("%u ms\n", info->idle);
+}
+in ruby inline:
+require 'inline'
+
+class XScreenSaver
+  class << self
+    inline do |builder|
+      builder.add_link_flags '-lXss'
+      builder.include '<X11/extensions/scrnsaver.h>'
+      builder.c %{
+        double idle_time() {
+          static Display *display;
+          XScreenSaverInfo *info = XScreenSaverAllocInfo();
+
+          if (!display)  display = XOpenDisplay(0);
+          if (!display)  return -1;
+
+          XScreenSaverQueryInfo(display, DefaultRootWindow(display), info);
+
+          return info->idle / 1000.0;
+        }
+      }
+    end
+  end
+end
+
+if __FILE__ == $0
+  loop { puts XScreenSaver.idle_time; sleep 0.2 }
+end
+