Fix bug in X event processing.

src/views/unix/SkOSWindow_Unix.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
 #include <X11/XKBlib.h>
@@ skipping 154 matching lines @@
         if (evt.xkey.state & gModi[i].fXMask) {
             modi |= gModi[i].fSkMask;
         }
     }
     return modi;
 }
 
 static SkMSec gTimerDelay;
 
 static bool MyXNextEventWithDelay(Display* dsp, XEvent* evt) {
+    // Check for pending events before entering the select loop. There might
+    // be events in the in-memory queue but not processed yet.
+    if (XPending(dsp)) {
+        XNextEvent(dsp, evt);
+        return true;
+    }
+
     SkMSec ms = gTimerDelay;
     if (ms > 0) {
         int x11_fd = ConnectionNumber(dsp);
         fd_set input_fds;
         FD_ZERO(&input_fds);
         FD_SET(x11_fd, &input_fds);
 
         timeval tv;
         tv.tv_sec = ms / 1000;              // seconds
         tv.tv_usec = (ms % 1000) * 1000;    // microseconds
@@ skipping 229 matching lines @@
 
 void SkEvent::SignalNonEmptyQueue() {
     // nothing to do, since we spin on our event-queue, polling for XPending
 }
 
 void SkEvent::SignalQueueTimer(SkMSec delay) {
     // just need to record the delay time. We handle waking up for it in
     // MyXNextEventWithDelay()
     gTimerDelay = delay;
 }