[client] x11: process clipboard events early

Due to the logic in the event loop property events may get filtered out
that were clipboard related. This changes ensures the clipboard event
handler code gets to run first avoiding this issue.

client/displayservers/X11/clipboard.c

@@ -59,30 +59,30 @@ static void x11CBSelectionIncr(const XPropertyEvent e);
 static void x11CBSelectionNotify(const XSelectionEvent e);
 static void x11CBXFixesSelectionNotify(const XFixesSelectionNotifyEvent e);
 
-void x11CBEventThread(const XEvent xe)
+bool x11CBEventThread(const XEvent xe)
 {
   switch(xe.type)
   {
     case SelectionRequest:
       x11CBSelectionRequest(xe.xselectionrequest);
-      break;
+      return true;
 
     case SelectionClear:
       x11CBSelectionClear(xe.xselectionclear);
-      break;
+      return true;
 
     case SelectionNotify:
       x11CBSelectionNotify(xe.xselection);
-      break;
+      return true;
 
     case PropertyNotify:
       if (xe.xproperty.atom == x11atoms.SEL_DATA)
       {
         if (x11cb.lowerBound == 0)
-          break;
+          return true;
 
         x11CBSelectionIncr(xe.xproperty);
-        break;
+        return true;
       }
       break;
 
@@ -91,9 +91,12 @@ void x11CBEventThread(const XEvent xe)
       {
         XFixesSelectionNotifyEvent * sne = (XFixesSelectionNotifyEvent *)&xe;
         x11CBXFixesSelectionNotify(*sne);
+        return true;
       }
       break;
   }
+
+  return false;
 }
 
 bool x11CBInit()

client/displayservers/X11/clipboard.h

@@ -25,7 +25,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 
 #include "interface/displayserver.h"
 
-void x11CBEventThread(const XEvent xe);
+bool x11CBEventThread(const XEvent xe);
 
 bool x11CBInit();
 void x11CBNotice(LG_ClipboardData type);

client/displayservers/X11/x11.c

@@ -558,6 +558,10 @@ static int x11EventThread(void * unused)
     XEvent xe;
     XNextEvent(x11.display, &xe);
 
+    // call the clipboard handling code
+    if (x11CBEventThread(xe))
+      continue;
+
     switch(xe.type)
     {
       case ClientMessage:
@@ -666,9 +670,6 @@ static int x11EventThread(void * unused)
         }
         break;
     }
-
-    // call the clipboard handling code
-    x11CBEventThread(xe);
   }
 
   return 0;