fixed the 'focus flicker' problem, seen with GTK2 applications

ChangeLog

@@ -110,6 +110,7 @@ Changes since version 0.80.2:
   (Marcelo E. Magallon <marcelo.magallon@bigfoot.com>)
 - Do not use the disabled clip color for the clip's workspace navigation arrows
   when the clip is collapsed (it made them look like disabled)
+- Fixed the 'focus flicker' problem, seen with GTK2 applications.
 
 
 Changes since version 0.80.1:

src/actions.c

@@ -144,14 +144,21 @@ wSetFocusTo(WScreen *scr, WWindow  *wwin)
         old_scr=scr;
     old_focused=old_scr->focused_window;
 
+    /*
+     * Safeguard: make sure the timestamp is monotonically increasing
+     * (very unlikely that this will ever be used, still a safeguard)
+     */
+    if (timestamp <= LastFocusChange)
+        timestamp = LastFocusChange + 1;
+
     LastFocusChange = timestamp;
 
     /*
      * This is a hack, because XSetInputFocus() should have a proper
      * timestamp instead of CurrentTime but it seems that some times
      * clients will not receive focus properly that way.
-     if (ignoreTimestamp)
      */
+    if (ignoreTimestamp)
         timestamp = CurrentTime;
 
     if (old_focused)

src/event.c

@@ -403,7 +403,10 @@ handleDeadProcess(void *foo)
 static void
 saveTimestamp(XEvent *event)
 {
-    LastTimestamp = CurrentTime;
+    /*
+     * Never save CurrentTime as LastTimestamp because CurrentTime
+     * it's not a real timestamp (it's the 0L constant)
+     */
 
     switch (event->type) {
      case ButtonRelease: