Linux: Refactor X11DesktopHandler

ui/events/devices/x11/touch_factory_x11.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/devices/x11/touch_factory_x11.h"
 
 #include <stddef.h>
 #include <X11/Xatom.h>
 #include <X11/cursorfont.h>
 #include <X11/extensions/XInput.h>
@@ skipping 195 matching lines @@
   // either resetup XInput2 for the window, so that we get events from the new
   // device, or we need to listen to events from all devices, and then filter
   // the events from uninteresting devices. We do the latter because that's
   // simpler.
 
   XDisplay* display = gfx::GetXDisplay();
 
   unsigned char mask[XIMaskLen(XI_LASTEVENT)];
   memset(mask, 0, sizeof(mask));
 
+  XISetMask(mask, XI_Enter);
+  XISetMask(mask, XI_Leave);
+  XISetMask(mask, XI_FocusIn);
+  XISetMask(mask, XI_FocusOut);
+
   XISetMask(mask, XI_TouchBegin);
   XISetMask(mask, XI_TouchUpdate);
   XISetMask(mask, XI_TouchEnd);
 
   XISetMask(mask, XI_ButtonPress);
   XISetMask(mask, XI_ButtonRelease);
   XISetMask(mask, XI_Motion);
   // HierarchyChanged and DeviceChanged allow X11EventSource to still pick up
   // these events.
   XISetMask(mask, XI_HierarchyChanged);
@@ skipping 114 matching lines @@
       std::find_if(touchscreens.begin(), touchscreens.end(),
                    [device_id](const TouchscreenDevice& touchscreen) {
                      return touchscreen.id == device_id;
                    });
   // Internal displays will have a vid and pid of 0. Ignore them.
   if (it != touchscreens.end() && it->vendor_id && it->product_id)
     touchscreen_ids_.insert(std::make_pair(it->vendor_id, it->product_id));
 }
 
 }  // namespace ui