From dee09fb8fcaab9abcecb748be5b31088b9c2b987 Mon Sep 17 00:00:00 2001
From: Keegan McAllister <mcallister.keegan@gmail.com>
Date: Wed, 2 May 2012 20:13:11 -0400
Subject: [PATCH] Update notification less often when disconnected for at least
 60 s

Saves battery power.  Closes #243.
---
 src/frontend/terminaloverlay.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/frontend/terminaloverlay.cc b/src/frontend/terminaloverlay.cc
index bbdd453..8c19386 100644
--- a/src/frontend/terminaloverlay.cc
+++ b/src/frontend/terminaloverlay.cc
@@ -286,7 +286,13 @@ int NotificationEngine::wait_time( void ) const
   next_expiry = std::min( next_expiry, message_expiration - now );
 
   if ( need_countup( now ) ) {
-    next_expiry = std::min( next_expiry, uint64_t( 1000 ) );
+    uint64_t countup_interval = 1000;
+    if ( ( now - last_word_from_server ) > 60000 ) {
+      /* If we've been disconnected for 60 seconds, save power by updating the
+         display less often.  See #243. */
+      countup_interval = Network::ACK_INTERVAL;
+    }
+    next_expiry = std::min( next_expiry, countup_interval );
   }
 
   return next_expiry;