Use new function to declare user activity (from 10.7.3). This is the new...

Use new function to declare user activity (from 10.7.3). This is the new official way to wake the display, rather than simply preventing display sleep.
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

modules/gui/macosx/intf.h

@@ -145,6 +145,7 @@ struct intf_sys_t
 
     /* sleep management */
     IOPMAssertionID systemSleepAssertionID;
+    IOPMAssertionID userActivityAssertionID;
 
     VLCVoutWindowController *o_vout_controller;
 }

modules/gui/macosx/intf.m

@@ -1407,6 +1407,20 @@ static VLCMain *_o_sharedMainInstance = nil;
     if (p_input) {
         int state = var_GetInteger(p_input, "state");
         if (state == PLAYING_S) {
+            /* Declare user activity.
+             This wakes the display if it is off, and postpones display sleep according to the users system preferences
+             Available from 10.7.3
+             */
+            if ([self activeVideoPlayback] && IOPMAssertionDeclareUserActivity)
+            {
+                CFStringRef reasonForActivity = CFStringCreateWithCString(kCFAllocatorDefault, _("VLC media playback"), kCFStringEncodingUTF8);
+                IOPMAssertionDeclareUserActivity(reasonForActivity,
+                                                 kIOPMUserActiveLocal,
+                                                 &userActivityAssertionID);
+                CFRelease(reasonForActivity);
+            }
+
+
             /* prevent the system from sleeping */
             if (systemSleepAssertionID > 0) {
                 msg_Dbg(VLCIntf, "releasing old sleep blocker (%i)" , systemSleepAssertionID);