Keep the mouse cursor within desktop

ui/aura/monitor_change_observer_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/aura/monitor_change_observer_x11.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <vector>
 
 #include <X11/extensions/Xrandr.h>
 
 #include "base/message_pump_x.h"
 #include "base/stl_util.h"
 #include "ui/aura/env.h"
+#include "ui/aura/dispatcher_linux.h"
 #include "ui/aura/monitor.h"
 #include "ui/aura/monitor_manager.h"
 
 namespace aura {
+namespace internal {
+
 namespace {
 XRRModeInfo* FindMode(XRRScreenResources* screen_resources, XID current_mode) {
   for (int m = 0; m < screen_resources->nmode; m++) {
     XRRModeInfo *mode = &screen_resources->modes[m];
     if (mode->id == current_mode)
       return mode;
   }
   return NULL;
 }
 
 bool CompareMonitorY(const Monitor* lhs, const Monitor* rhs) {
   return lhs->bounds().y() < rhs->bounds().y();
 }
 
-}  // namespace internal
+}  // namespace
 
 MonitorChangeObserverX11::MonitorChangeObserverX11()
     : xdisplay_(base::MessagePumpX::GetDefaultXDisplay()),
       x_root_window_(DefaultRootWindow(xdisplay_)),
       xrandr_event_base_(0) {
   XRRSelectInput(xdisplay_, x_root_window_, RRScreenChangeNotifyMask);
   int error_base_ignored;
   XRRQueryExtension(xdisplay_, &xrandr_event_base_, &error_base_ignored);
+  static_cast<DispatcherLinux*>(
+      Env::GetInstance()->GetDispatcher())->
+      WindowDispatcherCreated(x_root_window_, this);
 }
 
 MonitorChangeObserverX11::~MonitorChangeObserverX11() {
+  static_cast<DispatcherLinux*>(
+      Env::GetInstance()->GetDispatcher())->
+      WindowDispatcherDestroying(x_root_window_);
 }
 
-bool MonitorChangeObserverX11::Dispatch(const XEvent* event) {
+base::MessagePumpDispatcher::DispatchStatus
+MonitorChangeObserverX11::Dispatch(XEvent* event) {
   if (event->type - xrandr_event_base_ == RRScreenChangeNotify) {
     NotifyMonitorChange();
-    return true;
+    return base::MessagePumpDispatcher::EVENT_PROCESSED;
   }
-  return false;
+  return base::MessagePumpDispatcher::EVENT_IGNORED;
 }
 
 void MonitorChangeObserverX11::NotifyMonitorChange() {
   if (!MonitorManager::use_fullscreen_host_window())
     return;  // Use the default monitor that monitor manager determined.
 
   XRRScreenResources* screen_resources =
       XRRGetScreenResources(xdisplay_, x_root_window_);
   std::map<XID, XRRCrtcInfo*> crtc_info_map;
 
@@ skipping 36 matching lines @@
   // Free all allocated resources.
   for (std::map<XID, XRRCrtcInfo*>::const_iterator iter = crtc_info_map.begin();
        iter != crtc_info_map.end(); ++iter) {
     XRRFreeCrtcInfo(iter->second);
   }
   XRRFreeScreenResources(screen_resources);
 
   // PowerManager lays out the outputs vertically. Sort them by Y
   // coordinates.
   std::sort(monitors.begin(), monitors.end(), CompareMonitorY);
-  aura::Env::GetInstance()->monitor_manager()
+  Env::GetInstance()->monitor_manager()
       ->OnNativeMonitorsChanged(monitors);
   STLDeleteContainerPointers(monitors.begin(), monitors.end());
 }
 
+}  // namespace internal
 }  // namespace aura