Add PlatformWindow/Event related code for Ozone X11.

ui/events/x/events_x_utils.cc

 // Copyright (c) 2016 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/x/events_x_utils.h"
 
 #include <stddef.h>
 #include <string.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/XKBlib.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <cmath>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "build/build_config.h"
 #include "ui/events/devices/x11/device_data_manager_x11.h"
 #include "ui/events/devices/x11/device_list_cache_x11.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/x/x11_atom_cache.h"
-#include "ui/gfx/x/x11_types.h"
 
 namespace {
 
 // Scroll amount for each wheelscroll event. 53 is also the value used for GTK+.
 const int kWheelScrollAmount = 53;
 
 const int kMinWheelButton = 4;
 const int kMaxWheelButton = 7;
 
 // A class to track current modifier state on master device. Only track ctrl,
@@ skipping 277 matching lines @@
   if (g_last_seen_timestamp_ms_ - timestamp_64 > (UINT32_MAX >> 1))
     g_rollover_ms_ += static_cast<int64_t>(UINT32_MAX) + 1;  // ~49.7 days.
   g_last_seen_timestamp_ms_ = timestamp_64;
   return base::TimeDelta::FromMilliseconds(g_rollover_ms_ + timestamp_64);
 }
 
 }  // namespace
 
 namespace ui {
 
+XID XWindowFromXEvent(const XEvent& xev) {
+  XID target = xev.xany.window;
+  if (xev.type == GenericEvent)
+    target = static_cast<XIDeviceEvent*>(xev.xcookie.data)->event;
+  return target;
+}
+
 EventType EventTypeFromXEvent(const XEvent& xev) {
   // Allow the DeviceDataManager to block the event. If blocked return
   // ET_UNKNOWN as the type so this event will not be further processed.
   // NOTE: During some events unittests there is no device data manager.
   if (DeviceDataManager::HasInstance() &&
       static_cast<DeviceDataManagerX11*>(DeviceDataManager::GetInstance())
           ->IsEventBlocked(xev)) {
     return ET_UNKNOWN;
   }
 
@@ skipping 433 matching lines @@
                                                     vy_ordinal, is_cancel);
   return true;
 }
 
 void ResetTimestampRolloverCountersForTesting() {
   g_last_seen_timestamp_ms_ = 0;
   g_rollover_ms_ = 0;
 }
 
 }  // namespace ui