diff --git a/CMakeLists.txt b/CMakeLists.txt
index 28ba2ccd5..e03d5738e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,679 +1,680 @@
 cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 
 project(KWIN)
 set(PROJECT_VERSION "5.11.90")
 set(PROJECT_VERSION_MAJOR 5)
 
 set(QT_MIN_VERSION "5.7.0")
 set(KF5_MIN_VERSION "5.34.0")
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH} )
 
 find_package(ECM 0.0.11 REQUIRED NO_MODULE)
 
 include(FeatureSummary)
 include(WriteBasicConfigVersionFile)
 include(GenerateExportHeader)
 
 # where to look first for cmake modules, before ${CMAKE_ROOT}/Modules/ is checked
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
     Concurrent
     Core
     DBus
     Quick
     QuickWidgets
     Script
     UiTools
     Widgets
     X11Extras
 )
 
 find_package(Qt5Test ${QT_MIN_VERSION} CONFIG QUIET)
 set_package_properties(Qt5Test PROPERTIES
          PURPOSE "Required for tests"
          TYPE OPTIONAL
          )
 add_feature_info("Qt5Test" Qt5Test_FOUND "Required for building tests")
 if (NOT Qt5Test_FOUND)
     set(BUILD_TESTING OFF CACHE BOOL "Build the testing tree.")
 endif()
 
 include(KDEInstallDirs)
 include(KDECMakeSettings)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 
 include(ECMInstallIcons)
 include(ECMOptionalAddSubdirectory)
 
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0 -DQT_USE_QSTRINGBUILDER)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-inconsistent-missing-override")
 endif()
 
 find_package(Qt5Multimedia QUIET)
 set_package_properties(Qt5Multimedia PROPERTIES
          PURPOSE "Runtime-only dependency for effect video playback"
          TYPE RUNTIME
          )
 
 
 # required frameworks by Core
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     Config
     ConfigWidgets
     CoreAddons
     Crash
     GlobalAccel
     I18n
     Init
     Notifications
     Package
     Plasma
     WidgetsAddons
     WindowSystem
     IconThemes
     IdleTime
     Wayland
 )
 # required frameworks by config modules
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     Completion
     Declarative
     KCMUtils
     KIO
     TextWidgets
     NewStuff
     Service
     XmlGui
 )
 
 find_package(Threads)
 set_package_properties(Threads PROPERTIES
          PURPOSE "Needed for VirtualTerminal support in KWin Wayland"
          TYPE REQUIRED
          )
 
 # optional frameworks
 find_package(KF5Activities ${KF5_MIN_VERSION} CONFIG)
 set_package_properties(KF5Activities PROPERTIES
          PURPOSE "Enable building of KWin with kactivities support"
          TYPE OPTIONAL
          )
 add_feature_info("KF5Activities" KF5Activities_FOUND "Enable building of KWin with kactivities support")
 
 find_package(KF5DocTools ${KF5_MIN_VERSION} CONFIG)
 set_package_properties(KF5DocTools PROPERTIES
          PURPOSE "Enable building documentation"
          TYPE OPTIONAL
          )
 add_feature_info("KF5DocTools" KF5DocTools_FOUND "Enable building documentation")
 
 find_package(KDecoration2 CONFIG REQUIRED)
 
 find_package(KScreenLocker CONFIG REQUIRED)
 set_package_properties(KScreenLocker PROPERTIES
                        TYPE REQUIRED
                        PURPOSE "For screenlocker integration in kwin_wayland")
 
 find_package(Breeze 5.9.0 CONFIG)
 set_package_properties(Breeze PROPERTIES
                        TYPE OPTIONAL
                        PURPOSE "For setting the default window decoration plugin")
 if(${Breeze_FOUND})
     if(${BREEZE_WITH_KDECORATION})
         set(HAVE_BREEZE_DECO true)
     else()
         set(HAVE_BREEZE_DECO FALSE)
     endif()
 else()
     set(HAVE_BREEZE_DECO FALSE)
 endif()
 add_feature_info("Breeze-Decoration" HAVE_BREEZE_DECO "Default decoration plugin Breeze")
 
 find_package(EGL)
 set_package_properties(EGL PROPERTIES
                        TYPE RUNTIME
                        PURPOSE "Required to build KWin with EGL support"
                       )
 
 find_package(epoxy)
 set_package_properties(epoxy PROPERTIES DESCRIPTION "libepoxy"
                        URL "http://github.com/anholt/libepoxy"
                        TYPE REQUIRED
                        PURPOSE "OpenGL dispatch library"
                       )
 
 set(HAVE_DL_LIBRARY FALSE)
 if(epoxy_HAS_GLX)
     find_library(DL_LIBRARY dl)
     if(DL_LIBRARY)
         set(HAVE_DL_LIBRARY TRUE)
     endif()
 endif()
 
 find_package(Wayland 1.2 REQUIRED COMPONENTS Cursor OPTIONAL_COMPONENTS Egl)
 set_package_properties(Wayland PROPERTIES
                        TYPE REQUIRED
                        PURPOSE "Required for building KWin with Wayland support"
                       )
 add_feature_info("Wayland::EGL" Wayland_Egl_FOUND "Enable building of Wayland backend and QPA with EGL support.")
 set(HAVE_WAYLAND_EGL FALSE)
 if(Wayland_Egl_FOUND)
     set(HAVE_WAYLAND_EGL TRUE)
 endif()
 
 find_package(XKB 0.7.0)
 set_package_properties(XKB PROPERTIES
                        TYPE REQUIRED
                        PURPOSE "Required for building KWin with Wayland support"
                       )
 
 find_package(Libinput 1.5)
 set_package_properties(Libinput PROPERTIES TYPE OPTIONAL PURPOSE "Required for input handling on Wayland.")
 
 find_package(UDev)
 set_package_properties(UDev PROPERTIES  URL "http://www.freedesktop.org/software/systemd/libudev/"
                                         DESCRIPTION "Linux device library."
                                         TYPE OPTIONAL
                                         PURPOSE "Required for input handling on Wayland."
                         )
 set(HAVE_INPUT FALSE)
 if (Libinput_FOUND AND UDEV_FOUND)
     set(HAVE_INPUT TRUE)
 endif()
 set(HAVE_UDEV FALSE)
 if (UDEV_FOUND)
     set(HAVE_UDEV TRUE)
 endif()
 
 find_package(Libdrm 2.4.62)
 set_package_properties(Libdrm PROPERTIES TYPE OPTIONAL PURPOSE "Required for drm output on Wayland.")
 set(HAVE_DRM FALSE)
 if(Libdrm_FOUND AND UDEV_FOUND)
     set(HAVE_DRM TRUE)
 endif()
 
 find_package(gbm)
 set_package_properties(gbm PROPERTIES TYPE OPTIONAL PURPOSE "Required for egl ouput of drm backend.")
 set(HAVE_GBM FALSE)
 if(HAVE_DRM AND gbm_FOUND)
     set(HAVE_GBM TRUE)
 endif()
 
 find_package(libhybris)
 set_package_properties(libhybris PROPERTIES TYPE OPTIONAL PURPOSE "Required for libhybris backend")
 set(HAVE_LIBHYBRIS ${libhybris_FOUND})
 
 find_package(X11)
 set_package_properties(X11 PROPERTIES DESCRIPTION "X11 libraries"
                         URL "http://www.x.org"
                         TYPE REQUIRED
                     )
 add_feature_info("XInput" X11_Xinput_FOUND "Required for poll-free mouse cursor updates")
 set(HAVE_X11_XINPUT ${X11_Xinput_FOUND})
 
 # All the required XCB components
 find_package(XCB 1.10
     REQUIRED COMPONENTS
         XCB
         XFIXES
         DAMAGE
         COMPOSITE
         SHAPE
         SYNC
         RENDER
         RANDR
         KEYSYMS
         IMAGE
         SHM
         GLX
         CURSOR
         ICCCM
 )
 set_package_properties(XCB PROPERTIES TYPE REQUIRED)
 
 # and the optional XCB dependencies
 if (XCB_ICCCM_VERSION VERSION_LESS "0.4")
     set(XCB_ICCCM_FOUND FALSE)
 endif()
 add_feature_info("XCB-ICCCM" XCB_ICCCM_FOUND "Required for building test applications for KWin")
 
 find_package(X11_XCB)
 set_package_properties(X11_XCB PROPERTIES
                        PURPOSE "Required for building X11 windowed backend of kwin_wayland"
                        TYPE OPTIONAL)
 
 # dependencies for QPA plugin
 if(Qt5Core_VERSION VERSION_LESS "5.8.0")
     find_package(Qt5PlatformSupport REQUIRED)
 else()
     find_package(Qt5FontDatabaseSupport REQUIRED)
     find_package(Qt5ThemeSupport REQUIRED)
     find_package(Qt5EventDispatcherSupport REQUIRED)
 endif()
 
 find_package(Freetype REQUIRED)
 set_package_properties(Freetype PROPERTIES DESCRIPTION "A font rendering engine"
                        URL "http://www.freetype.org"
                        TYPE REQUIRED
                        PURPOSE "Needed for KWin's QPA plugin."
                       )
 find_package(Fontconfig REQUIRED)
 set_package_properties(Fontconfig PROPERTIES DESCRIPTION "Font access configuration library"
                        URL "http://www.freedesktop.org/wiki/Software/fontconfig"
                        TYPE REQUIRED
                        PURPOSE "Needed for KWin's QPA plugin."
                       )
 
 find_package(Xwayland)
 set_package_properties(Xwayland PROPERTIES
     URL "http://x.org"
     DESCRIPTION "Xwayland X server"
     TYPE RUNTIME
     PURPOSE "Needed for running kwin_wayland"
     )
 
 ########### configure tests ###############
 include(CMakeDependentOption)
 
 option(KWIN_BUILD_DECORATIONS "Enable building of KWin decorations." ON)
 option(KWIN_BUILD_KCMS "Enable building of KWin configuration modules." ON)
 option(KWIN_BUILD_TABBOX "Enable building of KWin Tabbox functionality" ON)
 option(KWIN_BUILD_XRENDER_COMPOSITING "Enable building of KWin with XRender Compositing support" ON)
 cmake_dependent_option(KWIN_BUILD_ACTIVITIES "Enable building of KWin with kactivities support" ON "KF5Activities_FOUND" OFF)
 
 # Binary name of KWin
 set(KWIN_NAME "kwin")
 set(KWIN_INTERNAL_NAME_X11 "kwin_x11")
 set(KWIN_INTERNAL_NAME_WAYLAND "kwin_wayland")
 set(KWIN_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 # KWIN_HAVE_XRENDER_COMPOSITING - whether XRender-based compositing support is available: may be disabled
 if( KWIN_BUILD_XRENDER_COMPOSITING )
     set( KWIN_HAVE_XRENDER_COMPOSITING 1 )
 endif()
 
 include_directories(${XKB_INCLUDE_DIR})
 
 include_directories(${epoxy_INCLUDE_DIR})
 set(HAVE_EPOXY_GLX ${epoxy_HAS_GLX})
 
 # for things that are also used by kwin libraries
 configure_file(libkwineffects/kwinconfig.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/libkwineffects/kwinconfig.h )
 # for kwin internal things
 set(HAVE_X11_XCB ${X11_XCB_FOUND})
 
 include(CheckIncludeFile)
 include(CheckIncludeFiles)
 include(CheckSymbolExists)
 check_include_files(unistd.h HAVE_UNISTD_H)
 check_include_files(malloc.h HAVE_MALLOC_H)
 
 check_include_file("sys/prctl.h" HAVE_SYS_PRCTL_H)
 check_symbol_exists(PR_SET_DUMPABLE "sys/prctl.h" HAVE_PR_SET_DUMPABLE)
 check_symbol_exists(PR_SET_PDEATHSIG "sys/prctl.h" HAVE_PR_SET_PDEATHSIG)
 check_include_file("sys/procctl.h" HAVE_SYS_PROCCTL_H)
 check_symbol_exists(PROC_TRACE_CTL "sys/procctl.h" HAVE_PROC_TRACE_CTL)
 if (HAVE_PR_SET_DUMPABLE OR HAVE_PROC_TRACE_CTL)
     set(CAN_DISABLE_PTRACE TRUE)
 endif()
 add_feature_info("prctl/procctl tracing control"
                  CAN_DISABLE_PTRACE
                  "Required for disallowing ptrace on kwin_wayland process")
 
 check_include_file("sys/sysmacros.h" HAVE_SYS_SYSMACROS_H)
 configure_file(config-kwin.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-kwin.h )
 
 check_include_file("linux/vt.h" HAVE_LINUX_VT_H)
 add_feature_info("linux/vt.h"
                  HAVE_LINUX_VT_H
                  "Required for virtual terminal support under wayland")
 check_include_file("linux/fb.h"    HAVE_LINUX_FB_H)
 add_feature_info("linux/fb.h"
                  HAVE_LINUX_FB_H
                  "Required for the fbdev backend")
 
 ########### global ###############
 set(kwin_effects_dbus_xml ${CMAKE_CURRENT_SOURCE_DIR}/org.kde.kwin.Effects.xml)
 
 include_directories(BEFORE
     ${CMAKE_CURRENT_BINARY_DIR}/libkwineffects
     ${CMAKE_CURRENT_BINARY_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/libkwineffects
     ${CMAKE_CURRENT_SOURCE_DIR}/effects
     ${CMAKE_CURRENT_SOURCE_DIR}/tabbox
     ${CMAKE_CURRENT_SOURCE_DIR}/platformsupport
     )
 
 add_subdirectory( libkwineffects )
 if(KWIN_BUILD_KCMS)
     add_subdirectory( kcmkwin )
 endif()
 
 add_subdirectory( data )
 
 add_subdirectory( effects )
 add_subdirectory( scripts )
 add_subdirectory( tabbox )
 add_subdirectory(scripting)
 add_subdirectory(helpers)
 
 ########### next target ###############
 
 set(kwin_KDEINIT_SRCS
    workspace.cpp
    dbusinterface.cpp
    abstract_client.cpp
    client.cpp
    client_machine.cpp
    cursor.cpp
    debug_console.cpp
    tabgroup.cpp
    focuschain.cpp
    globalshortcuts.cpp
    input.cpp
    input_event.cpp
    input_event_spy.cpp
    keyboard_input.cpp
    keyboard_layout.cpp
    keyboard_layout_switching.cpp
    keyboard_repeat.cpp
    pointer_input.cpp
    touch_input.cpp
    netinfo.cpp
    placement.cpp
    atoms.cpp
    utils.cpp
    layers.cpp
    main.cpp
    options.cpp
    outline.cpp
    events.cpp
    killwindow.cpp
    geometrytip.cpp
    screens.cpp
    shadow.cpp
    sm.cpp
    group.cpp
    manage.cpp
    overlaywindow.cpp
    activation.cpp
    useractions.cpp
    geometry.cpp
    rules.cpp
    composite.cpp
    toplevel.cpp
    unmanaged.cpp
    scene.cpp
    scene_opengl.cpp
    screenlockerwatcher.cpp
    thumbnailitem.cpp
    lanczosfilter.cpp
    deleted.cpp
    effects.cpp
    effectloader.cpp
    virtualdesktops.cpp
    xcbutils.cpp
    x11eventfilter.cpp
    logind.cpp
    onscreennotification.cpp
    osd.cpp
     screenedge.cpp
     scripting/scripting.cpp
     scripting/workspace_wrapper.cpp
     scripting/meta.cpp
     scripting/scriptedeffect.cpp
     scripting/scriptingutils.cpp
     scripting/timer.cpp
     scripting/scripting_model.cpp
     scripting/dbuscall.cpp
     scripting/screenedgeitem.cpp
     scripting/scripting_logging.cpp
     decorations/decoratedclient.cpp
     decorations/decorationbridge.cpp
     decorations/decorationpalette.cpp
     decorations/settings.cpp
     decorations/decorationrenderer.cpp
     decorations/decorations_logging.cpp
     abstract_egl_backend.cpp
     platform.cpp
     shell_client.cpp
     wayland_server.cpp
     wayland_cursor_theme.cpp
     virtualkeyboard.cpp
     appmenu.cpp
     modifier_only_shortcuts.cpp
     xkb.cpp
     gestures.cpp
     popup_input_filter.cpp
     abstract_opengl_context_attribute_builder.cpp
     egl_context_attribute_builder.cpp
     was_user_interaction_x11_filter.cpp
     moving_client_x11_filter.cpp
+    effects_mouse_interception_x11_filter.cpp
    )
 
 if(KWIN_BUILD_TABBOX)
     set(
         kwin_KDEINIT_SRCS ${kwin_KDEINIT_SRCS}
         tabbox/tabbox.cpp
         tabbox/clientmodel.cpp
         tabbox/desktopchain.cpp
         tabbox/desktopmodel.cpp
         tabbox/switcheritem.cpp
         tabbox/tabboxconfig.cpp
         tabbox/tabboxhandler.cpp
         tabbox/tabbox_logging.cpp
         tabbox/x11_filter.cpp
   )
 endif()
 
 if(KWIN_BUILD_ACTIVITIES)
     set(
         kwin_KDEINIT_SRCS ${kwin_KDEINIT_SRCS}
         activities.cpp
     )
 endif()
 
 if(UDEV_FOUND)
     set(kwin_KDEINIT_SRCS
         ${kwin_KDEINIT_SRCS}
         udev.cpp
     )
 endif()
 
 if(HAVE_INPUT)
     set(kwin_KDEINIT_SRCS
         ${kwin_KDEINIT_SRCS}
         libinput/context.cpp
         libinput/connection.cpp
         libinput/device.cpp
         libinput/events.cpp
         libinput/libinput_logging.cpp
     )
     if (HAVE_LINUX_VT_H)
          set(kwin_KDEINIT_SRCS
              ${kwin_KDEINIT_SRCS}
              virtual_terminal.cpp
          )
     endif()
 endif()
 
 kconfig_add_kcfg_files(kwin_KDEINIT_SRCS settings.kcfgc)
 
 qt5_add_dbus_adaptor( kwin_KDEINIT_SRCS org.kde.KWin.xml dbusinterface.h KWin::DBusInterface )
 qt5_add_dbus_adaptor( kwin_KDEINIT_SRCS org.kde.kwin.Compositing.xml dbusinterface.h KWin::CompositorDBusInterface )
 qt5_add_dbus_adaptor( kwin_KDEINIT_SRCS ${kwin_effects_dbus_xml} effects.h KWin::EffectsHandlerImpl )
 
 qt5_add_dbus_interface( kwin_KDEINIT_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/org.freedesktop.ScreenSaver.xml screenlocker_interface)
 
 qt5_add_dbus_interface( kwin_KDEINIT_SRCS org.kde.kappmenu.xml appmenu_interface )
 
 qt5_add_resources( kwin_KDEINIT_SRCS resources.qrc )
 
 ki18n_wrap_ui(kwin_KDEINIT_SRCS
     debug_console.ui
     shortcutdialog.ui
 )
 
 ########### target link libraries ###############
 
 set(kwin_OWN_LIBS
     kwineffects
     kwinxrenderutils
     kwin4_effect_builtins
 )
 
 set(kwin_QT_LIBS
     Qt5::Concurrent
     Qt5::DBus
     Qt5::Quick
     Qt5::Script
 )
 
 set(kwin_KDE_LIBS
     KF5::ConfigCore
     KF5::CoreAddons
     KF5::ConfigWidgets
     KF5::GlobalAccel
     KF5::GlobalAccelPrivate
     KF5::I18n
     KF5::Notifications
     KF5::Package
     KF5::Plasma
     KF5::WindowSystem
     KDecoration2::KDecoration
     KDecoration2::KDecoration2Private
     PW::KScreenLocker
 )
 
 set(kwin_XLIB_LIBS
     ${X11_X11_LIB}
     ${X11_ICE_LIB}
     ${X11_SM_LIB}
 )
 
 set(kwin_XCB_LIBS
     XCB::XCB
     XCB::XFIXES
     XCB::DAMAGE
     XCB::COMPOSITE
     XCB::SHAPE
     XCB::SYNC
     XCB::RENDER
     XCB::RANDR
     XCB::KEYSYMS
     XCB::SHM
     XCB::GLX
     XCB::ICCCM
 )
 
 set(kwin_WAYLAND_LIBS
     XKB::XKB
     KF5::WaylandClient
     KF5::WaylandServer
     Wayland::Cursor
     ${CMAKE_THREAD_LIBS_INIT}
 )
 
 if(KWIN_BUILD_ACTIVITIES)
     set(kwin_KDE_LIBS ${kwin_KDE_LIBS} KF5::Activities)
 endif()
 
 set(kwinLibs
     ${kwin_OWN_LIBS}
     ${kwin_QT_LIBS}
     ${kwin_KDE_LIBS}
     ${kwin_XLIB_LIBS}
     ${kwin_XCB_LIBS}
     ${kwin_WAYLAND_LIBS}
 )
 
 if(UDEV_FOUND)
     set(kwinLibs ${kwinLibs} ${UDEV_LIBS})
 endif()
 
 if(HAVE_INPUT)
     set(kwinLibs ${kwinLibs} Libinput::Libinput)
 endif()
 
 add_library(kwin SHARED ${kwin_KDEINIT_SRCS})
 
 set_target_properties(kwin PROPERTIES
    VERSION ${PROJECT_VERSION}
    SOVERSION ${PROJECT_VERSION_MAJOR}
    )
 
 target_link_libraries(kwin ${kwinLibs})
 generate_export_header(kwin EXPORT_FILE_NAME kwin_export.h)
 
 target_link_libraries(kwin kwinglutils ${epoxy_LIBRARY})
 
 kf5_add_kdeinit_executable(kwin_x11 main_x11.cpp)
 target_link_libraries(kdeinit_kwin_x11 kwin KF5::Crash Qt5::X11Extras)
 
 install(TARGETS kwin             ${INSTALL_TARGETS_DEFAULT_ARGS} LIBRARY NAMELINK_SKIP )
 install(TARGETS kdeinit_kwin_x11 ${INSTALL_TARGETS_DEFAULT_ARGS} )
 install(TARGETS kwin_x11         ${INSTALL_TARGETS_DEFAULT_ARGS} )
 
 add_executable(kwin_wayland main_wayland.cpp)
 target_link_libraries(kwin_wayland kwin)
 
 install(TARGETS kwin_wayland         ${INSTALL_TARGETS_DEFAULT_ARGS} )
 
 add_subdirectory(platformsupport)
 add_subdirectory(plugins)
 
 ########### install files ###############
 
 install( FILES kwin.kcfg  DESTINATION  ${KCFG_INSTALL_DIR} RENAME ${KWIN_NAME}.kcfg )
 install( FILES kwin.notifyrc  DESTINATION  ${KNOTIFYRC_INSTALL_DIR} RENAME ${KWIN_NAME}.notifyrc)
 install(
     FILES
         org.kde.KWin.xml
         org.kde.kwin.Compositing.xml
         org.kde.kwin.Effects.xml
     DESTINATION
         ${KDE_INSTALL_DBUSINTERFACEDIR}
 )
 install( FILES ${CMAKE_CURRENT_BINARY_DIR}/kwin_export.h DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel)
 
 # Install the KWin/Script service type
 install( FILES scripting/kwinscript.desktop DESTINATION ${SERVICETYPES_INSTALL_DIR} )
 
 ecm_install_icons(
     ICONS
         16-apps-kwin.png
         32-apps-kwin.png
         48-apps-kwin.png
         sc-apps-kwin.svgz
     DESTINATION
         ${ICON_INSTALL_DIR}
     THEME
         hicolor
 )
 
 add_subdirectory(qml)
 add_subdirectory(autotests)
 add_subdirectory(tests)
 add_subdirectory(packageplugins)
 
 if (KF5DocTools_FOUND)
     add_subdirectory(doc)
 endif()
 
 feature_summary(WHAT ALL INCLUDE_QUIET_PACKAGES FATAL_ON_MISSING_REQUIRED_PACKAGES)
 
 include(CMakePackageConfigHelpers)
 set(CMAKECONFIG_INSTALL_DIR "${CMAKECONFIG_INSTALL_PREFIX}/KWinDBusInterface")
 configure_package_config_file(KWinDBusInterfaceConfig.cmake.in
     "${CMAKE_CURRENT_BINARY_DIR}/KWinDBusInterfaceConfig.cmake"
     PATH_VARS KDE_INSTALL_DBUSINTERFACEDIR
     INSTALL_DESTINATION ${CMAKECONFIG_INSTALL_DIR})
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/KWinDBusInterfaceConfig.cmake
     DESTINATION ${CMAKECONFIG_INSTALL_DIR})
diff --git a/effects.cpp b/effects.cpp
index ed4adc146..d5d06e205 100644
--- a/effects.cpp
+++ b/effects.cpp
@@ -1,2133 +1,2136 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
 Copyright (C) 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 #include "effects.h"
 
 #include "effectsadaptor.h"
+#include "effects_mouse_interception_x11_filter.h"
 #include "effectloader.h"
 #ifdef KWIN_BUILD_ACTIVITIES
 #include "activities.h"
 #endif
 #include "deleted.h"
 #include "client.h"
 #include "cursor.h"
 #include "group.h"
 #include "osd.h"
 #include "pointer_input.h"
 #include "unmanaged.h"
 #ifdef KWIN_BUILD_TABBOX
 #include "tabbox.h"
 #endif
 #include "screenedge.h"
 #include "scripting/scriptedeffect.h"
 #include "screens.h"
 #include "screenlockerwatcher.h"
 #include "thumbnailitem.h"
 #include "virtualdesktops.h"
 #include "workspace.h"
 #include "kwinglutils.h"
 
 #include <QDebug>
 #include <QDesktopWidget>
 
 #include <Plasma/Theme>
 
 #include <assert.h>
 #include "composite.h"
 #include "xcbutils.h"
 #include "platform.h"
 #include "shell_client.h"
 #include "wayland_server.h"
 
 #include "decorations/decorationbridge.h"
 #include <KDecoration2/DecorationSettings>
 
 namespace KWin
 {
 //---------------------
 // Static
 
 static QByteArray readWindowProperty(xcb_window_t win, xcb_atom_t atom, xcb_atom_t type, int format)
 {
     if (win == XCB_WINDOW_NONE) {
         return QByteArray();
     }
     uint32_t len = 32768;
     for (;;) {
         Xcb::Property prop(false, win, atom, XCB_ATOM_ANY, 0, len);
         if (prop.isNull()) {
             // get property failed
             return QByteArray();
         }
         if (prop->bytes_after > 0) {
             len *= 2;
             continue;
         }
         return prop.toByteArray(format, type);
     }
 }
 
 static void deleteWindowProperty(Window win, long int atom)
 {
     if (win == XCB_WINDOW_NONE) {
         return;
     }
     xcb_delete_property(kwinApp()->x11Connection(), win, atom);
 }
 
 static xcb_atom_t registerSupportProperty(const QByteArray &propertyName)
 {
     auto c = kwinApp()->x11Connection();
     if (!c) {
         return XCB_ATOM_NONE;
     }
     // get the atom for the propertyName
     ScopedCPointer<xcb_intern_atom_reply_t> atomReply(xcb_intern_atom_reply(c,
         xcb_intern_atom_unchecked(c, false, propertyName.size(), propertyName.constData()),
         NULL));
     if (atomReply.isNull()) {
         return XCB_ATOM_NONE;
     }
     // announce property on root window
     unsigned char dummy = 0;
     xcb_change_property(c, XCB_PROP_MODE_REPLACE, kwinApp()->x11RootWindow(), atomReply->atom, atomReply->atom, 8, 1, &dummy);
     // TODO: add to _NET_SUPPORTED
     return atomReply->atom;
 }
 
 //---------------------
 
 EffectsHandlerImpl::EffectsHandlerImpl(Compositor *compositor, Scene *scene)
     : EffectsHandler(scene->compositingType())
     , keyboard_grab_effect(NULL)
     , fullscreen_effect(0)
     , next_window_quad_type(EFFECT_QUAD_TYPE_START)
     , m_compositor(compositor)
     , m_scene(scene)
     , m_desktopRendering(false)
     , m_currentRenderedDesktop(0)
     , m_effectLoader(new EffectLoader(this))
     , m_trackingCursorChanges(0)
 {
     qRegisterMetaType<QVector<KWin::EffectWindow*>>();
     connect(m_effectLoader, &AbstractEffectLoader::effectLoaded, this,
         [this](Effect *effect, const QString &name) {
             effect_order.insert(effect->requestedEffectChainPosition(), EffectPair(name, effect));
             loaded_effects << EffectPair(name, effect);
             effectsChanged();
         }
     );
     m_effectLoader->setConfig(kwinApp()->config());
     new EffectsAdaptor(this);
     QDBusConnection dbus = QDBusConnection::sessionBus();
     dbus.registerObject(QStringLiteral("/Effects"), this);
     // init is important, otherwise causes crashes when quads are build before the first painting pass start
     m_currentBuildQuadsIterator = m_activeEffects.constEnd();
 
     Workspace *ws = Workspace::self();
     VirtualDesktopManager *vds = VirtualDesktopManager::self();
     connect(ws, &Workspace::showingDesktopChanged,
             this, &EffectsHandlerImpl::showingDesktopChanged);
     connect(ws, &Workspace::currentDesktopChanged, this,
         [this](int old, AbstractClient *c) {
             const int newDesktop = VirtualDesktopManager::self()->current();
             if (old != 0 && newDesktop != old) {
                 emit desktopChanged(old, newDesktop, c ? c->effectWindow() : 0);
                 // TODO: remove in 4.10
                 emit desktopChanged(old, newDesktop);
             }
         }
     );
     connect(ws, &Workspace::desktopPresenceChanged, this,
         [this](AbstractClient *c, int old) {
             if (!c->effectWindow()) {
                 return;
             }
             emit desktopPresenceChanged(c->effectWindow(), old, c->desktop());
         }
     );
     connect(ws, &Workspace::clientAdded, this,
         [this](Client *c) {
             if (c->readyForPainting())
                 slotClientShown(c);
             else
                 connect(c, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotClientShown);
         }
     );
     connect(ws, &Workspace::unmanagedAdded, this,
         [this](Unmanaged *u) {
             // it's never initially ready but has synthetic 50ms delay
             connect(u, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotUnmanagedShown);
         }
     );
     connect(ws, &Workspace::clientActivated, this,
         [this](KWin::AbstractClient *c) {
             emit windowActivated(c ? c->effectWindow() : nullptr);
         }
     );
     connect(ws, &Workspace::deletedRemoved, this,
         [this](KWin::Deleted *d) {
             emit windowDeleted(d->effectWindow());
             elevated_windows.removeAll(d->effectWindow());
         }
     );
     connect(vds, &VirtualDesktopManager::countChanged, this, &EffectsHandler::numberDesktopsChanged);
     connect(Cursor::self(), &Cursor::mouseChanged, this, &EffectsHandler::mouseChanged);
     connect(ws, &Workspace::propertyNotify, this,
         [this](long int atom) {
             if (!registered_atoms.contains(atom))
                 return;
             emit propertyNotify(nullptr, atom);
         }
     );
     connect(screens(), &Screens::countChanged,    this, &EffectsHandler::numberScreensChanged);
     connect(screens(), &Screens::sizeChanged,     this, &EffectsHandler::virtualScreenSizeChanged);
     connect(screens(), &Screens::geometryChanged, this, &EffectsHandler::virtualScreenGeometryChanged);
 #ifdef KWIN_BUILD_ACTIVITIES
     if (Activities *activities = Activities::self()) {
         connect(activities, &Activities::added,          this, &EffectsHandler::activityAdded);
         connect(activities, &Activities::removed,        this, &EffectsHandler::activityRemoved);
         connect(activities, &Activities::currentChanged, this, &EffectsHandler::currentActivityChanged);
     }
 #endif
     connect(ws, &Workspace::stackingOrderChanged, this, &EffectsHandler::stackingOrderChanged);
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox *tabBox = TabBox::TabBox::self();
     connect(tabBox, &TabBox::TabBox::tabBoxAdded,    this, &EffectsHandler::tabBoxAdded);
     connect(tabBox, &TabBox::TabBox::tabBoxUpdated,  this, &EffectsHandler::tabBoxUpdated);
     connect(tabBox, &TabBox::TabBox::tabBoxClosed,   this, &EffectsHandler::tabBoxClosed);
     connect(tabBox, &TabBox::TabBox::tabBoxKeyEvent, this, &EffectsHandler::tabBoxKeyEvent);
 #endif
     connect(ScreenEdges::self(), &ScreenEdges::approaching, this, &EffectsHandler::screenEdgeApproaching);
     connect(ScreenLockerWatcher::self(), &ScreenLockerWatcher::locked, this, &EffectsHandler::screenLockingChanged);
 
     connect(kwinApp(), &Application::x11ConnectionChanged, this,
         [this] {
             registered_atoms.clear();
             for (auto it = m_propertiesForEffects.keyBegin(); it != m_propertiesForEffects.keyEnd(); it++) {
                 const auto atom = registerSupportProperty(*it);
                 if (atom == XCB_ATOM_NONE) {
                     continue;
                 }
                 m_compositor->keepSupportProperty(atom);
                 m_managedProperties.insert(*it, atom);
                 registerPropertyType(atom, true);
             }
             emit xcbConnectionChanged();
         }
     );
 
     // connect all clients
     for (Client *c : ws->clientList()) {
         setupClientConnections(c);
     }
     for (Unmanaged *u : ws->unmanagedList()) {
         setupUnmanagedConnections(u);
     }
     if (auto w = waylandServer()) {
         connect(w, &WaylandServer::shellClientAdded, this,
             [this](ShellClient *c) {
                 if (c->readyForPainting())
                     slotShellClientShown(c);
                 else
                     connect(c, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotShellClientShown);
             }
         );
     }
     reconfigure();
 }
 
 EffectsHandlerImpl::~EffectsHandlerImpl()
 {
     unloadAllEffects();
 }
 
 void EffectsHandlerImpl::unloadAllEffects()
 {
     makeOpenGLContextCurrent();
     if (keyboard_grab_effect != NULL)
         ungrabKeyboard();
     setActiveFullScreenEffect(nullptr);
     for (auto it = loaded_effects.begin(); it != loaded_effects.end(); ++it) {
         Effect *effect = (*it).second;
         stopMouseInterception(effect);
         // remove support properties for the effect
         const QList<QByteArray> properties = m_propertiesForEffects.keys();
         for (const QByteArray &property : properties) {
             removeSupportProperty(property, effect);
         }
         delete effect;
     }
     loaded_effects.clear();
     m_effectLoader->clear();
 }
 
 void EffectsHandlerImpl::setupAbstractClientConnections(AbstractClient* c)
 {
     connect(c, &AbstractClient::windowClosed, this, &EffectsHandlerImpl::slotWindowClosed);
     connect(c, static_cast<void (AbstractClient::*)(KWin::AbstractClient*, MaximizeMode)>(&AbstractClient::clientMaximizedStateChanged),
             this, &EffectsHandlerImpl::slotClientMaximized);
     connect(c, &AbstractClient::clientStartUserMovedResized, this,
         [this](AbstractClient *c) {
             emit windowStartUserMovedResized(c->effectWindow());
         }
     );
     connect(c, &AbstractClient::clientStepUserMovedResized, this,
         [this](AbstractClient *c, const QRect &geometry) {
             emit windowStepUserMovedResized(c->effectWindow(), geometry);
         }
     );
     connect(c, &AbstractClient::clientFinishUserMovedResized, this,
         [this](AbstractClient *c) {
             emit windowFinishUserMovedResized(c->effectWindow());
         }
     );
     connect(c, &AbstractClient::opacityChanged, this, &EffectsHandlerImpl::slotOpacityChanged);
     connect(c, &AbstractClient::clientMinimized, this,
         [this](AbstractClient *c, bool animate) {
             // TODO: notify effects even if it should not animate?
             if (animate) {
                 emit windowMinimized(c->effectWindow());
             }
         }
     );
     connect(c, &AbstractClient::clientUnminimized, this,
         [this](AbstractClient* c, bool animate) {
             // TODO: notify effects even if it should not animate?
             if (animate) {
                 emit windowUnminimized(c->effectWindow());
             }
         }
     );
     connect(c, &AbstractClient::modalChanged,         this, &EffectsHandlerImpl::slotClientModalityChanged);
     connect(c, &AbstractClient::geometryShapeChanged, this, &EffectsHandlerImpl::slotGeometryShapeChanged);
     connect(c, &AbstractClient::damaged,              this, &EffectsHandlerImpl::slotWindowDamaged);
     connect(c, &AbstractClient::unresponsiveChanged, this,
         [this, c](bool unresponsive) {
             emit windowUnresponsiveChanged(c->effectWindow(), unresponsive);
         }
     );
     connect(c, &AbstractClient::windowShown, this,
         [this](Toplevel *c) {
             emit windowShown(c->effectWindow());
         }
     );
     connect(c, &AbstractClient::windowHidden, this,
         [this](Toplevel *c) {
             emit windowHidden(c->effectWindow());
         }
     );
 }
 
 void EffectsHandlerImpl::setupClientConnections(Client* c)
 {
     setupAbstractClientConnections(c);
     connect(c, &Client::paddingChanged,       this, &EffectsHandlerImpl::slotPaddingChanged);
     connect(c, &Client::propertyNotify,       this, &EffectsHandlerImpl::slotPropertyNotify);
 }
 
 void EffectsHandlerImpl::setupUnmanagedConnections(Unmanaged* u)
 {
     connect(u, &Unmanaged::windowClosed,         this, &EffectsHandlerImpl::slotWindowClosed);
     connect(u, &Unmanaged::opacityChanged,       this, &EffectsHandlerImpl::slotOpacityChanged);
     connect(u, &Unmanaged::geometryShapeChanged, this, &EffectsHandlerImpl::slotGeometryShapeChanged);
     connect(u, &Unmanaged::paddingChanged,       this, &EffectsHandlerImpl::slotPaddingChanged);
     connect(u, &Unmanaged::damaged,              this, &EffectsHandlerImpl::slotWindowDamaged);
     connect(u, &Unmanaged::propertyNotify,       this, &EffectsHandlerImpl::slotPropertyNotify);
 }
 
 void EffectsHandlerImpl::reconfigure()
 {
     m_effectLoader->queryAndLoadAll();
 }
 
 // the idea is that effects call this function again which calls the next one
 void EffectsHandlerImpl::prePaintScreen(ScreenPrePaintData& data, int time)
 {
     if (m_currentPaintScreenIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintScreenIterator++)->prePaintScreen(data, time);
         --m_currentPaintScreenIterator;
     }
     // no special final code
 }
 
 void EffectsHandlerImpl::paintScreen(int mask, QRegion region, ScreenPaintData& data)
 {
     if (m_currentPaintScreenIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintScreenIterator++)->paintScreen(mask, region, data);
         --m_currentPaintScreenIterator;
     } else
         m_scene->finalPaintScreen(mask, region, data);
 }
 
 void EffectsHandlerImpl::paintDesktop(int desktop, int mask, QRegion region, ScreenPaintData &data)
 {
     if (desktop < 1 || desktop > numberOfDesktops()) {
         return;
     }
     m_currentRenderedDesktop = desktop;
     m_desktopRendering = true;
     // save the paint screen iterator
     EffectsIterator savedIterator = m_currentPaintScreenIterator;
     m_currentPaintScreenIterator = m_activeEffects.constBegin();
     effects->paintScreen(mask, region, data);
     // restore the saved iterator
     m_currentPaintScreenIterator = savedIterator;
     m_desktopRendering = false;
 }
 
 void EffectsHandlerImpl::postPaintScreen()
 {
     if (m_currentPaintScreenIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintScreenIterator++)->postPaintScreen();
         --m_currentPaintScreenIterator;
     }
     // no special final code
 }
 
 void EffectsHandlerImpl::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time)
 {
     if (m_currentPaintWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintWindowIterator++)->prePaintWindow(w, data, time);
         --m_currentPaintWindowIterator;
     }
     // no special final code
 }
 
 void EffectsHandlerImpl::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
 {
     if (m_currentPaintWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintWindowIterator++)->paintWindow(w, mask, region, data);
         --m_currentPaintWindowIterator;
     } else
         m_scene->finalPaintWindow(static_cast<EffectWindowImpl*>(w), mask, region, data);
 }
 
 void EffectsHandlerImpl::paintEffectFrame(EffectFrame* frame, QRegion region, double opacity, double frameOpacity)
 {
     if (m_currentPaintEffectFrameIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintEffectFrameIterator++)->paintEffectFrame(frame, region, opacity, frameOpacity);
         --m_currentPaintEffectFrameIterator;
     } else {
         const EffectFrameImpl* frameImpl = static_cast<const EffectFrameImpl*>(frame);
         frameImpl->finalRender(region, opacity, frameOpacity);
     }
 }
 
 void EffectsHandlerImpl::postPaintWindow(EffectWindow* w)
 {
     if (m_currentPaintWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintWindowIterator++)->postPaintWindow(w);
         --m_currentPaintWindowIterator;
     }
     // no special final code
 }
 
 Effect *EffectsHandlerImpl::provides(Effect::Feature ef)
 {
     for (int i = 0; i < loaded_effects.size(); ++i)
         if (loaded_effects.at(i).second->provides(ef))
             return loaded_effects.at(i).second;
     return NULL;
 }
 
 void EffectsHandlerImpl::drawWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
 {
     if (m_currentDrawWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentDrawWindowIterator++)->drawWindow(w, mask, region, data);
         --m_currentDrawWindowIterator;
     } else
         m_scene->finalDrawWindow(static_cast<EffectWindowImpl*>(w), mask, region, data);
 }
 
 void EffectsHandlerImpl::buildQuads(EffectWindow* w, WindowQuadList& quadList)
 {
     static bool initIterator = true;
     if (initIterator) {
         m_currentBuildQuadsIterator = m_activeEffects.constBegin();
         initIterator = false;
     }
     if (m_currentBuildQuadsIterator != m_activeEffects.constEnd()) {
         (*m_currentBuildQuadsIterator++)->buildQuads(w, quadList);
         --m_currentBuildQuadsIterator;
     }
     if (m_currentBuildQuadsIterator == m_activeEffects.constBegin())
         initIterator = true;
 }
 
 bool EffectsHandlerImpl::hasDecorationShadows() const
 {
     return false;
 }
 
 bool EffectsHandlerImpl::decorationsHaveAlpha() const
 {
     return true;
 }
 
 bool EffectsHandlerImpl::decorationSupportsBlurBehind() const
 {
     return Decoration::DecorationBridge::self()->needsBlur();
 }
 
 // start another painting pass
 void EffectsHandlerImpl::startPaint()
 {
     m_activeEffects.clear();
     m_activeEffects.reserve(loaded_effects.count());
     for(QVector< KWin::EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->isActive()) {
             m_activeEffects << it->second;
         }
     }
     m_currentDrawWindowIterator = m_activeEffects.constBegin();
     m_currentPaintWindowIterator = m_activeEffects.constBegin();
     m_currentPaintScreenIterator = m_activeEffects.constBegin();
     m_currentPaintEffectFrameIterator = m_activeEffects.constBegin();
 }
 
 void EffectsHandlerImpl::slotClientMaximized(KWin::AbstractClient *c, MaximizeMode maxMode)
 {
     bool horizontal = false;
     bool vertical = false;
     switch (maxMode) {
     case MaximizeHorizontal:
         horizontal = true;
         break;
     case MaximizeVertical:
         vertical = true;
         break;
     case MaximizeFull:
         horizontal = true;
         vertical = true;
         break;
     case MaximizeRestore: // fall through
     default:
         // default - nothing to do
         break;
     }
     if (EffectWindowImpl *w = c->effectWindow()) {
         emit windowMaximizedStateChanged(w, horizontal, vertical);
     }
 }
 
 void EffectsHandlerImpl::slotOpacityChanged(Toplevel *t, qreal oldOpacity)
 {
     if (t->opacity() == oldOpacity || !t->effectWindow()) {
         return;
     }
     emit windowOpacityChanged(t->effectWindow(), oldOpacity, (qreal)t->opacity());
 }
 
 void EffectsHandlerImpl::slotClientShown(KWin::Toplevel *t)
 {
     Q_ASSERT(dynamic_cast<Client*>(t));
     Client *c = static_cast<Client*>(t);
     disconnect(c, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotClientShown);
     setupClientConnections(c);
     if (!c->tabGroup()) // the "window" has already been there
         emit windowAdded(c->effectWindow());
 }
 
 void EffectsHandlerImpl::slotShellClientShown(Toplevel *t)
 {
     ShellClient *c = static_cast<ShellClient*>(t);
     setupAbstractClientConnections(c);
     emit windowAdded(t->effectWindow());
 }
 
 void EffectsHandlerImpl::slotUnmanagedShown(KWin::Toplevel *t)
 {   // regardless, unmanaged windows are -yet?- not synced anyway
     Q_ASSERT(dynamic_cast<Unmanaged*>(t));
     Unmanaged *u = static_cast<Unmanaged*>(t);
     setupUnmanagedConnections(u);
     emit windowAdded(u->effectWindow());
 }
 
 void EffectsHandlerImpl::slotWindowClosed(KWin::Toplevel *c, KWin::Deleted *d)
 {
     c->disconnect(this);
     if (d) {
         emit windowClosed(c->effectWindow());
     }
 }
 
 void EffectsHandlerImpl::slotClientModalityChanged()
 {
     emit windowModalityChanged(static_cast<Client*>(sender())->effectWindow());
 }
 
 void EffectsHandlerImpl::slotCurrentTabAboutToChange(EffectWindow *from, EffectWindow *to)
 {
     emit currentTabAboutToChange(from, to);
 }
 
 void EffectsHandlerImpl::slotTabAdded(EffectWindow* w, EffectWindow* to)
 {
     emit tabAdded(w, to);
 }
 
 void EffectsHandlerImpl::slotTabRemoved(EffectWindow *w, EffectWindow* leaderOfFormerGroup)
 {
     emit tabRemoved(w, leaderOfFormerGroup);
 }
 
 void EffectsHandlerImpl::slotWindowDamaged(Toplevel* t, const QRect& r)
 {
     if (!t->effectWindow()) {
         // can happen during tear down of window
         return;
     }
     emit windowDamaged(t->effectWindow(), r);
 }
 
 void EffectsHandlerImpl::slotGeometryShapeChanged(Toplevel* t, const QRect& old)
 {
     // during late cleanup effectWindow() may be already NULL
     // in some functions that may still call this
     if (t == NULL || t->effectWindow() == NULL)
         return;
     emit windowGeometryShapeChanged(t->effectWindow(), old);
 }
 
 void EffectsHandlerImpl::slotPaddingChanged(Toplevel* t, const QRect& old)
 {
     // during late cleanup effectWindow() may be already NULL
     // in some functions that may still call this
     if (t == NULL || t->effectWindow() == NULL)
         return;
     emit windowPaddingChanged(t->effectWindow(), old);
 }
 
 void EffectsHandlerImpl::setActiveFullScreenEffect(Effect* e)
 {
     fullscreen_effect = e;
 }
 
 Effect* EffectsHandlerImpl::activeFullScreenEffect() const
 {
     return fullscreen_effect;
 }
 
 bool EffectsHandlerImpl::grabKeyboard(Effect* effect)
 {
     if (keyboard_grab_effect != NULL)
         return false;
     if (kwinApp()->operationMode() == Application::OperationModeX11) {
         bool ret = grabXKeyboard();
         if (!ret)
             return false;
         // Workaround for Qt 5.9 regression introduced with 2b34aefcf02f09253473b096eb4faffd3e62b5f4
         // we no longer get any events for the root window, one needs to call winId() on the desktop window
         // TODO: change effects event handling to create the appropriate QKeyEvent without relying on Qt
         // as it's done already in the Wayland case.
         qApp->desktop()->winId();
     }
     keyboard_grab_effect = effect;
     return true;
 }
 
 void EffectsHandlerImpl::ungrabKeyboard()
 {
     assert(keyboard_grab_effect != NULL);
     if (kwinApp()->operationMode() == Application::OperationModeX11) {
         ungrabXKeyboard();
     }
     keyboard_grab_effect = NULL;
 }
 
 void EffectsHandlerImpl::grabbedKeyboardEvent(QKeyEvent* e)
 {
     if (keyboard_grab_effect != NULL)
         keyboard_grab_effect->grabbedKeyboardEvent(e);
 }
 
 void EffectsHandlerImpl::startMouseInterception(Effect *effect, Qt::CursorShape shape)
 {
     if (m_grabbedMouseEffects.contains(effect)) {
         return;
     }
     m_grabbedMouseEffects.append(effect);
     if (m_grabbedMouseEffects.size() != 1) {
         return;
     }
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
         input()->pointer()->setEffectsOverrideCursor(shape);
         return;
     }
     // NOTE: it is intended to not perform an XPointerGrab on X11. See documentation in kwineffects.h
     // The mouse grab is implemented by using a full screen input only window
     if (!m_mouseInterceptionWindow.isValid()) {
         const QSize &s = screens()->size();
         const QRect geo(0, 0, s.width(), s.height());
         const uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
         const uint32_t values[] = {
             true,
             XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION
         };
         m_mouseInterceptionWindow.reset(Xcb::createInputWindow(geo, mask, values));
         defineCursor(shape);
     } else {
         defineCursor(shape);
     }
     m_mouseInterceptionWindow.map();
     m_mouseInterceptionWindow.raise();
+    m_x11MouseInterception = std::make_unique<EffectsMouseInterceptionX11Filter>(m_mouseInterceptionWindow, this);
     // Raise electric border windows above the input windows
     // so they can still be triggered.
     ScreenEdges::self()->ensureOnTop();
 }
 
 void EffectsHandlerImpl::stopMouseInterception(Effect *effect)
 {
     if (!m_grabbedMouseEffects.contains(effect)) {
         return;
     }
     m_grabbedMouseEffects.removeAll(effect);
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
         input()->pointer()->removeEffectsOverrideCursor();
         return;
     }
     if (m_grabbedMouseEffects.isEmpty()) {
         m_mouseInterceptionWindow.unmap();
+        m_x11MouseInterception.reset();
         Workspace::self()->stackScreenEdgesUnderOverrideRedirect();
     }
 }
 
 bool EffectsHandlerImpl::isMouseInterception() const
 {
     return m_grabbedMouseEffects.count() > 0;
 }
 
 
 bool EffectsHandlerImpl::touchDown(quint32 id, const QPointF &pos, quint32 time)
 {
     // TODO: reverse call order?
     for (auto it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->touchDown(id, pos, time)) {
             return true;
         }
     }
     return false;
 }
 
 bool EffectsHandlerImpl::touchMotion(quint32 id, const QPointF &pos, quint32 time)
 {
     // TODO: reverse call order?
     for (auto it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->touchMotion(id, pos, time)) {
             return true;
         }
     }
     return false;
 }
 
 bool EffectsHandlerImpl::touchUp(quint32 id, quint32 time)
 {
     // TODO: reverse call order?
     for (auto it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->touchUp(id, time)) {
             return true;
         }
     }
     return false;
 }
 
 void EffectsHandlerImpl::registerGlobalShortcut(const QKeySequence &shortcut, QAction *action)
 {
     input()->registerShortcut(shortcut, action);
 }
 
 void EffectsHandlerImpl::registerPointerShortcut(Qt::KeyboardModifiers modifiers, Qt::MouseButton pointerButtons, QAction *action)
 {
     input()->registerPointerShortcut(modifiers, pointerButtons, action);
 }
 
 void EffectsHandlerImpl::registerAxisShortcut(Qt::KeyboardModifiers modifiers, PointerAxisDirection axis, QAction *action)
 {
     input()->registerAxisShortcut(modifiers, axis, action);
 }
 
 void EffectsHandlerImpl::registerTouchpadSwipeShortcut(SwipeDirection direction, QAction *action)
 {
     input()->registerTouchpadSwipeShortcut(direction, action);
 }
 
 void* EffectsHandlerImpl::getProxy(QString name)
 {
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it)
         if ((*it).first == name)
             return (*it).second->proxy();
 
     return NULL;
 }
 
 void EffectsHandlerImpl::startMousePolling()
 {
     if (Cursor::self())
         Cursor::self()->startMousePolling();
 }
 
 void EffectsHandlerImpl::stopMousePolling()
 {
     if (Cursor::self())
         Cursor::self()->stopMousePolling();
 }
 
 bool EffectsHandlerImpl::hasKeyboardGrab() const
 {
     return keyboard_grab_effect != NULL;
 }
 
 void EffectsHandlerImpl::desktopResized(const QSize &size)
 {
     m_scene->screenGeometryChanged(size);
     if (m_mouseInterceptionWindow.isValid()) {
         m_mouseInterceptionWindow.setGeometry(QRect(0, 0, size.width(), size.height()));
     }
     emit screenGeometryChanged(size);
 }
 
 void EffectsHandlerImpl::slotPropertyNotify(Toplevel* t, long int atom)
 {
     if (!registered_atoms.contains(atom))
         return;
     emit propertyNotify(t->effectWindow(), atom);
 }
 
 void EffectsHandlerImpl::registerPropertyType(long atom, bool reg)
 {
     if (reg)
         ++registered_atoms[ atom ]; // initialized to 0 if not present yet
     else {
         if (--registered_atoms[ atom ] == 0)
             registered_atoms.remove(atom);
     }
 }
 
 xcb_atom_t EffectsHandlerImpl::announceSupportProperty(const QByteArray &propertyName, Effect *effect)
 {
     PropertyEffectMap::iterator it = m_propertiesForEffects.find(propertyName);
     if (it != m_propertiesForEffects.end()) {
         // property has already been registered for an effect
         // just append Effect and return the atom stored in m_managedProperties
         if (!it.value().contains(effect)) {
             it.value().append(effect);
         }
         return m_managedProperties.value(propertyName, XCB_ATOM_NONE);
     }
     m_propertiesForEffects.insert(propertyName, QList<Effect*>() << effect);
     const auto atom = registerSupportProperty(propertyName);
     if (atom == XCB_ATOM_NONE) {
         return atom;
     }
     m_compositor->keepSupportProperty(atom);
     m_managedProperties.insert(propertyName, atom);
     registerPropertyType(atom, true);
     return atom;
 }
 
 void EffectsHandlerImpl::removeSupportProperty(const QByteArray &propertyName, Effect *effect)
 {
     PropertyEffectMap::iterator it = m_propertiesForEffects.find(propertyName);
     if (it == m_propertiesForEffects.end()) {
         // property is not registered - nothing to do
         return;
     }
     if (!it.value().contains(effect)) {
         // property is not registered for given effect - nothing to do
         return;
     }
     it.value().removeAll(effect);
     if (!it.value().isEmpty()) {
         // property still registered for another effect - nothing further to do
         return;
     }
     const xcb_atom_t atom = m_managedProperties.take(propertyName);
     registerPropertyType(atom, false);
     m_propertiesForEffects.remove(propertyName);
     m_compositor->removeSupportProperty(atom); // delayed removal
 }
 
 QByteArray EffectsHandlerImpl::readRootProperty(long atom, long type, int format) const
 {
     if (!kwinApp()->x11Connection()) {
         return QByteArray();
     }
     return readWindowProperty(kwinApp()->x11RootWindow(), atom, type, format);
 }
 
 void EffectsHandlerImpl::activateWindow(EffectWindow* c)
 {
     if (AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(c)->window()))
         Workspace::self()->activateClient(cl, true);
 }
 
 EffectWindow* EffectsHandlerImpl::activeWindow() const
 {
     return Workspace::self()->activeClient() ? Workspace::self()->activeClient()->effectWindow() : NULL;
 }
 
 void EffectsHandlerImpl::moveWindow(EffectWindow* w, const QPoint& pos, bool snap, double snapAdjust)
 {
     AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(w)->window());
     if (!cl || !cl->isMovable())
         return;
 
     if (snap)
         cl->move(Workspace::self()->adjustClientPosition(cl, pos, true, snapAdjust));
     else
         cl->move(pos);
 }
 
 void EffectsHandlerImpl::windowToDesktop(EffectWindow* w, int desktop)
 {
     AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(w)->window());
     if (cl && !cl->isDesktop() && !cl->isDock())
         Workspace::self()->sendClientToDesktop(cl, desktop, true);
 }
 
 void EffectsHandlerImpl::windowToScreen(EffectWindow* w, int screen)
 {
     AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(w)->window());
     if (cl && !cl->isDesktop() && !cl->isDock())
         Workspace::self()->sendClientToScreen(cl, screen);
 }
 
 void EffectsHandlerImpl::setShowingDesktop(bool showing)
 {
     Workspace::self()->setShowingDesktop(showing);
 }
 
 QString EffectsHandlerImpl::currentActivity() const
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     if (!Activities::self()) {
         return QString();
     }
     return Activities::self()->current();
 #else
     return QString();
 #endif
 }
 
 int EffectsHandlerImpl::currentDesktop() const
 {
     return VirtualDesktopManager::self()->current();
 }
 
 int EffectsHandlerImpl::numberOfDesktops() const
 {
     return VirtualDesktopManager::self()->count();
 }
 
 void EffectsHandlerImpl::setCurrentDesktop(int desktop)
 {
     VirtualDesktopManager::self()->setCurrent(desktop);
 }
 
 void EffectsHandlerImpl::setNumberOfDesktops(int desktops)
 {
     VirtualDesktopManager::self()->setCount(desktops);
 }
 
 QSize EffectsHandlerImpl::desktopGridSize() const
 {
     return VirtualDesktopManager::self()->grid().size();
 }
 
 int EffectsHandlerImpl::desktopGridWidth() const
 {
     return desktopGridSize().width();
 }
 
 int EffectsHandlerImpl::desktopGridHeight() const
 {
     return desktopGridSize().height();
 }
 
 int EffectsHandlerImpl::workspaceWidth() const
 {
     return desktopGridWidth() * screens()->size().width();
 }
 
 int EffectsHandlerImpl::workspaceHeight() const
 {
     return desktopGridHeight() * screens()->size().height();
 }
 
 int EffectsHandlerImpl::desktopAtCoords(QPoint coords) const
 {
     if (auto vd = VirtualDesktopManager::self()->grid().at(coords)) {
         return vd->x11DesktopNumber();
     }
     return 0;
 }
 
 QPoint EffectsHandlerImpl::desktopGridCoords(int id) const
 {
     return VirtualDesktopManager::self()->grid().gridCoords(id);
 }
 
 QPoint EffectsHandlerImpl::desktopCoords(int id) const
 {
     QPoint coords = VirtualDesktopManager::self()->grid().gridCoords(id);
     if (coords.x() == -1)
         return QPoint(-1, -1);
     const QSize displaySize = screens()->size();
     return QPoint(coords.x() * displaySize.width(), coords.y() * displaySize.height());
 }
 
 int EffectsHandlerImpl::desktopAbove(int desktop, bool wrap) const
 {
     return getDesktop<DesktopAbove>(desktop, wrap);
 }
 
 int EffectsHandlerImpl::desktopToRight(int desktop, bool wrap) const
 {
     return getDesktop<DesktopRight>(desktop, wrap);
 }
 
 int EffectsHandlerImpl::desktopBelow(int desktop, bool wrap) const
 {
     return getDesktop<DesktopBelow>(desktop, wrap);
 }
 
 int EffectsHandlerImpl::desktopToLeft(int desktop, bool wrap) const
 {
     return getDesktop<DesktopLeft>(desktop, wrap);
 }
 
 QString EffectsHandlerImpl::desktopName(int desktop) const
 {
     return VirtualDesktopManager::self()->name(desktop);
 }
 
 bool EffectsHandlerImpl::optionRollOverDesktops() const
 {
     return options->isRollOverDesktops();
 }
 
 double EffectsHandlerImpl::animationTimeFactor() const
 {
     return options->animationTimeFactor();
 }
 
 WindowQuadType EffectsHandlerImpl::newWindowQuadType()
 {
     return WindowQuadType(next_window_quad_type++);
 }
 
 EffectWindow* EffectsHandlerImpl::findWindow(WId id) const
 {
     if (Client* w = Workspace::self()->findClient(Predicate::WindowMatch, id))
         return w->effectWindow();
     if (Unmanaged* w = Workspace::self()->findUnmanaged(id))
         return w->effectWindow();
     if (waylandServer()) {
         if (ShellClient *w = waylandServer()->findClient(id)) {
             return w->effectWindow();
         }
     }
     return NULL;
 }
 
 EffectWindow* EffectsHandlerImpl::findWindow(KWayland::Server::SurfaceInterface *surf) const
 {
     if (waylandServer()) {
         if (ShellClient *w = waylandServer()->findClient(surf)) {
             return w->effectWindow();
         }
     }
     return nullptr;
 }
 
 
 EffectWindowList EffectsHandlerImpl::stackingOrder() const
 {
     ToplevelList list = Workspace::self()->xStackingOrder();
     EffectWindowList ret;
     for (Toplevel *t : list) {
         if (EffectWindow *w = effectWindow(t))
             ret.append(w);
     }
     return ret;
 }
 
 void EffectsHandlerImpl::setElevatedWindow(KWin::EffectWindow* w, bool set)
 {
     elevated_windows.removeAll(w);
     if (set)
         elevated_windows.append(w);
 }
 
 void EffectsHandlerImpl::setTabBoxWindow(EffectWindow* w)
 {
 #ifdef KWIN_BUILD_TABBOX
     if (AbstractClient* c = dynamic_cast< AbstractClient* >(static_cast< EffectWindowImpl* >(w)->window())) {
         TabBox::TabBox::self()->setCurrentClient(c);
     }
 #else
     Q_UNUSED(w)
 #endif
 }
 
 void EffectsHandlerImpl::setTabBoxDesktop(int desktop)
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->setCurrentDesktop(desktop);
 #else
     Q_UNUSED(desktop)
 #endif
 }
 
 EffectWindowList EffectsHandlerImpl::currentTabBoxWindowList() const
 {
 #ifdef KWIN_BUILD_TABBOX
     EffectWindowList ret;
     const auto clients = TabBox::TabBox::self()->currentClientList();
     for (auto c : clients)
     ret.append(c->effectWindow());
     return ret;
 #else
     return EffectWindowList();
 #endif
 }
 
 void EffectsHandlerImpl::refTabBox()
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->reference();
 #endif
 }
 
 void EffectsHandlerImpl::unrefTabBox()
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->unreference();
 #endif
 }
 
 void EffectsHandlerImpl::closeTabBox()
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->close();
 #endif
 }
 
 QList< int > EffectsHandlerImpl::currentTabBoxDesktopList() const
 {
 #ifdef KWIN_BUILD_TABBOX
     return TabBox::TabBox::self()->currentDesktopList();
 #endif
     return QList< int >();
 }
 
 int EffectsHandlerImpl::currentTabBoxDesktop() const
 {
 #ifdef KWIN_BUILD_TABBOX
     return TabBox::TabBox::self()->currentDesktop();
 #endif
     return -1;
 }
 
 EffectWindow* EffectsHandlerImpl::currentTabBoxWindow() const
 {
 #ifdef KWIN_BUILD_TABBOX
     if (auto c = TabBox::TabBox::self()->currentClient())
         return c->effectWindow();
 #endif
     return NULL;
 }
 
 void EffectsHandlerImpl::addRepaintFull()
 {
     m_compositor->addRepaintFull();
 }
 
 void EffectsHandlerImpl::addRepaint(const QRect& r)
 {
     m_compositor->addRepaint(r);
 }
 
 void EffectsHandlerImpl::addRepaint(const QRegion& r)
 {
     m_compositor->addRepaint(r);
 }
 
 void EffectsHandlerImpl::addRepaint(int x, int y, int w, int h)
 {
     m_compositor->addRepaint(x, y, w, h);
 }
 
 int EffectsHandlerImpl::activeScreen() const
 {
     return screens()->current();
 }
 
 int EffectsHandlerImpl::numScreens() const
 {
     return screens()->count();
 }
 
 int EffectsHandlerImpl::screenNumber(const QPoint& pos) const
 {
     return screens()->number(pos);
 }
 
 QRect EffectsHandlerImpl::clientArea(clientAreaOption opt, int screen, int desktop) const
 {
     return Workspace::self()->clientArea(opt, screen, desktop);
 }
 
 QRect EffectsHandlerImpl::clientArea(clientAreaOption opt, const EffectWindow* c) const
 {
     const Toplevel* t = static_cast< const EffectWindowImpl* >(c)->window();
     if (const AbstractClient* cl = dynamic_cast< const AbstractClient* >(t))
         return Workspace::self()->clientArea(opt, cl);
     else
         return Workspace::self()->clientArea(opt, t->geometry().center(), VirtualDesktopManager::self()->current());
 }
 
 QRect EffectsHandlerImpl::clientArea(clientAreaOption opt, const QPoint& p, int desktop) const
 {
     return Workspace::self()->clientArea(opt, p, desktop);
 }
 
 QRect EffectsHandlerImpl::virtualScreenGeometry() const
 {
     return screens()->geometry();
 }
 
 QSize EffectsHandlerImpl::virtualScreenSize() const
 {
     return screens()->size();
 }
 
 void EffectsHandlerImpl::defineCursor(Qt::CursorShape shape)
 {
     if (!m_mouseInterceptionWindow.isValid()) {
         input()->pointer()->setEffectsOverrideCursor(shape);
         return;
     }
     const xcb_cursor_t c = Cursor::x11Cursor(shape);
     if (c != XCB_CURSOR_NONE) {
         m_mouseInterceptionWindow.defineCursor(c);
     }
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(xcb_button_press_event_t *e)
 {
     if (m_grabbedMouseEffects.isEmpty() || m_mouseInterceptionWindow != e->event) {
         return false;
     }
     for (Effect *effect : m_grabbedMouseEffects) {
         Qt::MouseButton button = x11ToQtMouseButton(e->detail);
         Qt::MouseButtons buttons = x11ToQtMouseButtons(e->state);
         const QEvent::Type type = ((e->response_type & ~0x80) == XCB_BUTTON_PRESS) ? QEvent::MouseButtonPress : QEvent::MouseButtonRelease;
         if (type == QEvent::MouseButtonPress) {
             buttons |= button;
         } else {
             buttons &= ~button;
         }
         QMouseEvent ev(type,
                         QPoint(e->event_x, e->event_y), QPoint(e->root_x, e->root_y),
                         button, buttons, x11ToQtKeyboardModifiers(e->state));
         effect->windowInputMouseEvent(&ev);
     }
     return true; // eat event
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(xcb_motion_notify_event_t *e)
 {
     if (m_grabbedMouseEffects.isEmpty() || m_mouseInterceptionWindow != e->event) {
         return false;
     }
     for (Effect *effect : m_grabbedMouseEffects) {
         QMouseEvent ev(QEvent::MouseMove, QPoint(e->event_x, e->event_y), QPoint(e->root_x, e->root_y),
                         Qt::NoButton, x11ToQtMouseButtons(e->state), x11ToQtKeyboardModifiers(e->state));
         effect->windowInputMouseEvent(&ev);
     }
     return true; // eat event
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(QMouseEvent *e)
 {
     if (m_grabbedMouseEffects.isEmpty()) {
         return false;
     }
     foreach (Effect *effect, m_grabbedMouseEffects) {
         effect->windowInputMouseEvent(e);
     }
     return true;
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(QWheelEvent *e)
 {
     if (m_grabbedMouseEffects.isEmpty()) {
         return false;
     }
     foreach (Effect *effect, m_grabbedMouseEffects) {
         effect->windowInputMouseEvent(e);
     }
     return true;
 }
 
 void EffectsHandlerImpl::connectNotify(const QMetaMethod &signal)
 {
     if (signal == QMetaMethod::fromSignal(&EffectsHandler::cursorShapeChanged)) {
         if (!m_trackingCursorChanges) {
             connect(Cursor::self(), &Cursor::cursorChanged, this, &EffectsHandler::cursorShapeChanged);
             Cursor::self()->startCursorTracking();
         }
         ++m_trackingCursorChanges;
     }
     EffectsHandler::connectNotify(signal);
 }
 
 void EffectsHandlerImpl::disconnectNotify(const QMetaMethod &signal)
 {
     if (signal == QMetaMethod::fromSignal(&EffectsHandler::cursorShapeChanged)) {
         Q_ASSERT(m_trackingCursorChanges > 0);
         if (!--m_trackingCursorChanges) {
             Cursor::self()->stopCursorTracking();
             disconnect(Cursor::self(), &Cursor::cursorChanged, this, &EffectsHandler::cursorShapeChanged);
         }
     }
     EffectsHandler::disconnectNotify(signal);
 }
 
 
 void EffectsHandlerImpl::checkInputWindowStacking()
 {
     if (m_grabbedMouseEffects.isEmpty()) {
         return;
     }
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
         return;
     }
     m_mouseInterceptionWindow.raise();
     // Raise electric border windows above the input windows
     // so they can still be triggered. TODO: Do both at once.
     ScreenEdges::self()->ensureOnTop();
 }
 
 QPoint EffectsHandlerImpl::cursorPos() const
 {
     return Cursor::pos();
 }
 
 void EffectsHandlerImpl::reserveElectricBorder(ElectricBorder border, Effect *effect)
 {
     ScreenEdges::self()->reserve(border, effect, "borderActivated");
 }
 
 void EffectsHandlerImpl::unreserveElectricBorder(ElectricBorder border, Effect *effect)
 {
     ScreenEdges::self()->unreserve(border, effect);
 }
 
 void EffectsHandlerImpl::registerTouchBorder(ElectricBorder border, QAction *action)
 {
     ScreenEdges::self()->reserveTouch(border, action);
 }
 
 void EffectsHandlerImpl::unregisterTouchBorder(ElectricBorder border, QAction *action)
 {
     ScreenEdges::self()->unreserveTouch(border, action);
 }
 
 unsigned long EffectsHandlerImpl::xrenderBufferPicture()
 {
     return m_scene->xrenderBufferPicture();
 }
 
 QPainter *EffectsHandlerImpl::scenePainter()
 {
     return m_scene->scenePainter();
 }
 
 void EffectsHandlerImpl::toggleEffect(const QString& name)
 {
     if (isEffectLoaded(name))
         unloadEffect(name);
     else
         loadEffect(name);
 }
 
 QStringList EffectsHandlerImpl::loadedEffects() const
 {
     QStringList listModules;
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         listModules << (*it).first;
     }
     return listModules;
 }
 
 QStringList EffectsHandlerImpl::listOfEffects() const
 {
     return m_effectLoader->listOfKnownEffects();
 }
 
 bool EffectsHandlerImpl::loadEffect(const QString& name)
 {
     makeOpenGLContextCurrent();
     m_compositor->addRepaintFull();
 
     return m_effectLoader->loadEffect(name);
 }
 
 void EffectsHandlerImpl::unloadEffect(const QString& name)
 {
     makeOpenGLContextCurrent();
     m_compositor->addRepaintFull();
 
     for (QMap< int, EffectPair >::iterator it = effect_order.begin(); it != effect_order.end(); ++it) {
         if (it.value().first == name) {
             qCDebug(KWIN_CORE) << "EffectsHandler::unloadEffect : Unloading Effect : " << name;
             if (activeFullScreenEffect() == it.value().second) {
                 setActiveFullScreenEffect(0);
             }
             stopMouseInterception(it.value().second);
             // remove support properties for the effect
             const QList<QByteArray> properties = m_propertiesForEffects.keys();
             for (const QByteArray &property : properties) {
                 removeSupportProperty(property, it.value().second);
             }
             delete it.value().second;
             effect_order.erase(it);
             effectsChanged();
             return;
         }
     }
 
     qCDebug(KWIN_CORE) << "EffectsHandler::unloadEffect : Effect not loaded : " << name;
 }
 
 void EffectsHandlerImpl::reconfigureEffect(const QString& name)
 {
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it)
         if ((*it).first == name) {
             kwinApp()->config()->reparseConfiguration();
             makeOpenGLContextCurrent();
             (*it).second->reconfigure(Effect::ReconfigureAll);
             return;
         }
 }
 
 bool EffectsHandlerImpl::isEffectLoaded(const QString& name) const
 {
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it)
         if ((*it).first == name)
             return true;
 
     return false;
 }
 
 bool EffectsHandlerImpl::isEffectSupported(const QString &name)
 {
     // if the effect is loaded, it is obviously supported
     auto it = std::find_if(loaded_effects.constBegin(), loaded_effects.constEnd(), [name](const EffectPair &pair) {
         return pair.first == name;
     });
     if (it != loaded_effects.constEnd()) {
         return true;
     }
 
     // next checks might require a context
     makeOpenGLContextCurrent();
     m_compositor->addRepaintFull();
 
     return m_effectLoader->isEffectSupported(name);
 
 }
 
 QList< bool > EffectsHandlerImpl::areEffectsSupported(const QStringList &names)
 {
     QList< bool > retList;
     for (const QString &name : names) {
         retList << isEffectSupported(name);
     }
     return retList;
 }
 
 void EffectsHandlerImpl::reloadEffect(Effect *effect)
 {
     QString effectName;
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if ((*it).second == effect) {
             effectName = (*it).first;
             break;
         }
     }
     if (!effectName.isNull()) {
         unloadEffect(effectName);
         m_effectLoader->loadEffect(effectName);
     }
 }
 
 void EffectsHandlerImpl::effectsChanged()
 {
     loaded_effects.clear();
     m_activeEffects.clear(); // it's possible to have a reconfigure and a quad rebuild between two paint cycles - bug #308201
 //    qDebug() << "Recreating effects' list:";
     for (const EffectPair & effect : effect_order) {
 //        qDebug() << effect.first;
         loaded_effects.append(effect);
     }
     m_activeEffects.reserve(loaded_effects.count());
 }
 
 QStringList EffectsHandlerImpl::activeEffects() const
 {
     QStringList ret;
     for(QVector< KWin::EffectPair >::const_iterator it = loaded_effects.constBegin(),
                                                     end = loaded_effects.constEnd(); it != end; ++it) {
             if (it->second->isActive()) {
                 ret << it->first;
             }
         }
     return ret;
 }
 
 KWayland::Server::Display *EffectsHandlerImpl::waylandDisplay() const
 {
     if (waylandServer()) {
         return waylandServer()->display();
     }
     return nullptr;
 }
 
 EffectFrame* EffectsHandlerImpl::effectFrame(EffectFrameStyle style, bool staticSize, const QPoint& position, Qt::Alignment alignment) const
 {
     return new EffectFrameImpl(style, staticSize, position, alignment);
 }
 
 
 QVariant EffectsHandlerImpl::kwinOption(KWinOption kwopt)
 {
     switch (kwopt) {
     case CloseButtonCorner:
         // TODO: this could become per window and be derived from the actual position in the deco
         return Decoration::DecorationBridge::self()->settings()->decorationButtonsLeft().contains(KDecoration2::DecorationButtonType::Close) ? Qt::TopLeftCorner : Qt::TopRightCorner;
     case SwitchDesktopOnScreenEdge:
         return ScreenEdges::self()->isDesktopSwitching();
     case SwitchDesktopOnScreenEdgeMovingWindows:
         return ScreenEdges::self()->isDesktopSwitchingMovingClients();
     default:
         return QVariant(); // an invalid one
     }
 }
 
 QString EffectsHandlerImpl::supportInformation(const QString &name) const
 {
     if (!isEffectLoaded(name)) {
         return QString();
     }
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if ((*it).first == name) {
             QString support((*it).first + QLatin1String(":\n"));
             const QMetaObject *metaOptions = (*it).second->metaObject();
             for (int i=0; i<metaOptions->propertyCount(); ++i) {
                 const QMetaProperty property = metaOptions->property(i);
                 if (qstrcmp(property.name(), "objectName") == 0) {
                     continue;
                 }
                 support += QString::fromUtf8(property.name()) + QLatin1String(": ") + (*it).second->property(property.name()).toString() + QLatin1Char('\n');
             }
             return support;
         }
     }
     return QString();
 }
 
 
 bool EffectsHandlerImpl::isScreenLocked() const
 {
     return ScreenLockerWatcher::self()->isLocked();
 }
 
 QString EffectsHandlerImpl::debug(const QString& name, const QString& parameter) const
 {
     QString internalName = name.toLower();;
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if ((*it).first == internalName) {
             return it->second->debug(parameter);
         }
     }
     return QString();
 }
 
 bool EffectsHandlerImpl::makeOpenGLContextCurrent()
 {
     return m_scene->makeOpenGLContextCurrent();
 }
 
 void EffectsHandlerImpl::doneOpenGLContextCurrent()
 {
     m_scene->doneOpenGLContextCurrent();
 }
 
 bool EffectsHandlerImpl::animationsSupported() const
 {
     static const QByteArray forceEnvVar = qgetenv("KWIN_EFFECTS_FORCE_ANIMATIONS");
     if (!forceEnvVar.isEmpty()) {
         static const int forceValue = forceEnvVar.toInt();
         return forceValue == 1;
     }
     return m_scene->animationsSupported();
 }
 
 void EffectsHandlerImpl::highlightWindows(const QVector<EffectWindow *> &windows)
 {
     Effect *e = provides(Effect::HighlightWindows);
     if (!e) {
         return;
     }
     e->perform(Effect::HighlightWindows, QVariantList{QVariant::fromValue(windows)});
 }
 
 PlatformCursorImage EffectsHandlerImpl::cursorImage() const
 {
     return kwinApp()->platform()->cursorImage();
 }
 
 void EffectsHandlerImpl::hideCursor()
 {
     kwinApp()->platform()->hideCursor();
 }
 
 void EffectsHandlerImpl::showCursor()
 {
     kwinApp()->platform()->showCursor();
 }
 
 void EffectsHandlerImpl::startInteractiveWindowSelection(std::function<void(KWin::EffectWindow*)> callback)
 {
     kwinApp()->platform()->startInteractiveWindowSelection(
         [callback] (KWin::Toplevel *t) {
             if (t && t->effectWindow()) {
                 callback(t->effectWindow());
             } else {
                 callback(nullptr);
             }
         }
     );
 }
 
 void EffectsHandlerImpl::startInteractivePositionSelection(std::function<void(const QPoint&)> callback)
 {
     kwinApp()->platform()->startInteractivePositionSelection(callback);
 }
 
 void EffectsHandlerImpl::showOnScreenMessage(const QString &message, const QString &iconName)
 {
     OSD::show(message, iconName);
 }
 
 void EffectsHandlerImpl::hideOnScreenMessage(OnScreenMessageHideFlags flags)
 {
     OSD::HideFlags osdFlags;
     if (flags.testFlag(OnScreenMessageHideFlag::SkipsCloseAnimation)) {
         osdFlags |= OSD::HideFlag::SkipCloseAnimation;
     }
     OSD::hide(osdFlags);
 }
 
 KSharedConfigPtr EffectsHandlerImpl::config() const
 {
     return kwinApp()->config();
 }
 
 KSharedConfigPtr EffectsHandlerImpl::inputConfig() const
 {
     return kwinApp()->inputConfig();
 }
 
 //****************************************
 // EffectWindowImpl
 //****************************************
 
 EffectWindowImpl::EffectWindowImpl(Toplevel *toplevel)
     : EffectWindow(toplevel)
     , toplevel(toplevel)
     , sw(NULL)
 {
 }
 
 EffectWindowImpl::~EffectWindowImpl()
 {
     QVariant cachedTextureVariant = data(LanczosCacheRole);
     if (cachedTextureVariant.isValid()) {
         GLTexture *cachedTexture = static_cast< GLTexture*>(cachedTextureVariant.value<void*>());
         delete cachedTexture;
     }
 }
 
 bool EffectWindowImpl::isPaintingEnabled()
 {
     return sceneWindow()->isPaintingEnabled();
 }
 
 void EffectWindowImpl::enablePainting(int reason)
 {
     sceneWindow()->enablePainting(reason);
 }
 
 void EffectWindowImpl::disablePainting(int reason)
 {
     sceneWindow()->disablePainting(reason);
 }
 
 const EffectWindowGroup* EffectWindowImpl::group() const
 {
     if (Client* c = dynamic_cast< Client* >(toplevel))
         return c->group()->effectGroup();
     return NULL; // TODO
 }
 
 void EffectWindowImpl::refWindow()
 {
     if (Deleted* d = dynamic_cast< Deleted* >(toplevel))
         return d->refWindow();
     abort(); // TODO
 }
 
 void EffectWindowImpl::unrefWindow()
 {
     if (Deleted* d = dynamic_cast< Deleted* >(toplevel))
         return d->unrefWindow();   // delays deletion in case
     abort(); // TODO
 }
 
 void EffectWindowImpl::setWindow(Toplevel* w)
 {
     toplevel = w;
     setParent(w);
 }
 
 void EffectWindowImpl::setSceneWindow(Scene::Window* w)
 {
     sw = w;
 }
 
 QRegion EffectWindowImpl::shape() const
 {
     return sw ? sw->shape() : geometry();
 }
 
 QRect EffectWindowImpl::decorationInnerRect() const
 {
     Client *client = dynamic_cast<Client*>(toplevel);
     return client ? client->transparentRect() : contentsRect();
 }
 
 QByteArray EffectWindowImpl::readProperty(long atom, long type, int format) const
 {
     if (!kwinApp()->x11Connection()) {
         return QByteArray();
     }
     return readWindowProperty(window()->window(), atom, type, format);
 }
 
 void EffectWindowImpl::deleteProperty(long int atom) const
 {
     if (kwinApp()->x11Connection()) {
         deleteWindowProperty(window()->window(), atom);
     }
 }
 
 EffectWindow* EffectWindowImpl::findModal()
 {
     if (AbstractClient* c = dynamic_cast< AbstractClient* >(toplevel)) {
         if (AbstractClient* c2 = c->findModal())
             return c2->effectWindow();
     }
     return NULL;
 }
 
 template <typename T>
 EffectWindowList getMainWindows(Toplevel *toplevel)
 {
     T *c = static_cast<T*>(toplevel);
     EffectWindowList ret;
     const auto mainclients = c->mainClients();
     for (auto tmp : mainclients)
         ret.append(tmp->effectWindow());
     return ret;
 }
 
 EffectWindowList EffectWindowImpl::mainWindows() const
 {
     if (dynamic_cast<AbstractClient*>(toplevel)) {
         return getMainWindows<AbstractClient>(toplevel);
     } else if (toplevel->isDeleted()) {
         return getMainWindows<Deleted>(toplevel);
     }
     return EffectWindowList();
 }
 
 WindowQuadList EffectWindowImpl::buildQuads(bool force) const
 {
     return sceneWindow()->buildQuads(force);
 }
 
 void EffectWindowImpl::setData(int role, const QVariant &data)
 {
     if (!data.isNull())
         dataMap[ role ] = data;
     else
         dataMap.remove(role);
     emit effects->windowDataChanged(this, role);
 }
 
 QVariant EffectWindowImpl::data(int role) const
 {
     if (!dataMap.contains(role))
         return QVariant();
     return dataMap[ role ];
 }
 
 EffectWindow* effectWindow(Toplevel* w)
 {
     EffectWindowImpl* ret = w->effectWindow();
     return ret;
 }
 
 EffectWindow* effectWindow(Scene::Window* w)
 {
     EffectWindowImpl* ret = w->window()->effectWindow();
     ret->setSceneWindow(w);
     return ret;
 }
 
 void EffectWindowImpl::elevate(bool elevate)
 {
     effects->setElevatedWindow(this, elevate);
 }
 
 void EffectWindowImpl::registerThumbnail(AbstractThumbnailItem *item)
 {
     if (WindowThumbnailItem *thumb = qobject_cast<WindowThumbnailItem*>(item)) {
         insertThumbnail(thumb);
         connect(thumb, SIGNAL(destroyed(QObject*)), SLOT(thumbnailDestroyed(QObject*)));
         connect(thumb, SIGNAL(wIdChanged(qulonglong)), SLOT(thumbnailTargetChanged()));
     } else if (DesktopThumbnailItem *desktopThumb = qobject_cast<DesktopThumbnailItem*>(item)) {
         m_desktopThumbnails.append(desktopThumb);
         connect(desktopThumb, SIGNAL(destroyed(QObject*)), SLOT(desktopThumbnailDestroyed(QObject*)));
     }
 }
 
 void EffectWindowImpl::thumbnailDestroyed(QObject *object)
 {
     // we know it is a ThumbnailItem
     m_thumbnails.remove(static_cast<WindowThumbnailItem*>(object));
 }
 
 void EffectWindowImpl::thumbnailTargetChanged()
 {
     if (WindowThumbnailItem *item = qobject_cast<WindowThumbnailItem*>(sender())) {
         insertThumbnail(item);
     }
 }
 
 void EffectWindowImpl::insertThumbnail(WindowThumbnailItem *item)
 {
     EffectWindow *w = effects->findWindow(item->wId());
     if (w) {
         m_thumbnails.insert(item, QWeakPointer<EffectWindowImpl>(static_cast<EffectWindowImpl*>(w)));
     } else {
         m_thumbnails.insert(item, QWeakPointer<EffectWindowImpl>());
     }
 }
 
 void EffectWindowImpl::desktopThumbnailDestroyed(QObject *object)
 {
     // we know it is a DesktopThumbnailItem
     m_desktopThumbnails.removeAll(static_cast<DesktopThumbnailItem*>(object));
 }
 
 void EffectWindowImpl::referencePreviousWindowPixmap()
 {
     if (sw) {
         sw->referencePreviousPixmap();
     }
 }
 
 void EffectWindowImpl::unreferencePreviousWindowPixmap()
 {
     if (sw) {
         sw->unreferencePreviousPixmap();
     }
 }
 
 //****************************************
 // EffectWindowGroupImpl
 //****************************************
 
 
 EffectWindowList EffectWindowGroupImpl::members() const
 {
     EffectWindowList ret;
     for (Toplevel * c : group->members())
     ret.append(c->effectWindow());
     return ret;
 }
 
 //****************************************
 // EffectFrameImpl
 //****************************************
 
 EffectFrameImpl::EffectFrameImpl(EffectFrameStyle style, bool staticSize, QPoint position, Qt::Alignment alignment)
     : QObject(0)
     , EffectFrame()
     , m_style(style)
     , m_static(staticSize)
     , m_point(position)
     , m_alignment(alignment)
     , m_shader(NULL)
     , m_theme(new Plasma::Theme(this))
 {
     if (m_style == EffectFrameStyled) {
         m_frame.setImagePath(QStringLiteral("widgets/background"));
         m_frame.setCacheAllRenderedFrames(true);
         connect(m_theme, SIGNAL(themeChanged()), this, SLOT(plasmaThemeChanged()));
     }
     m_selection.setImagePath(QStringLiteral("widgets/viewitem"));
     m_selection.setElementPrefix(QStringLiteral("hover"));
     m_selection.setCacheAllRenderedFrames(true);
     m_selection.setEnabledBorders(Plasma::FrameSvg::AllBorders);
 
     m_sceneFrame = Compositor::self()->scene()->createEffectFrame(this);
 }
 
 EffectFrameImpl::~EffectFrameImpl()
 {
     delete m_sceneFrame;
 }
 
 const QFont& EffectFrameImpl::font() const
 {
     return m_font;
 }
 
 void EffectFrameImpl::setFont(const QFont& font)
 {
     if (m_font == font) {
         return;
     }
     m_font = font;
     QRect oldGeom = m_geometry;
     if (!m_text.isEmpty()) {
         autoResize();
     }
     if (oldGeom == m_geometry) {
         // Wasn't updated in autoResize()
         m_sceneFrame->freeTextFrame();
     }
 }
 
 void EffectFrameImpl::free()
 {
     m_sceneFrame->free();
 }
 
 const QRect& EffectFrameImpl::geometry() const
 {
     return m_geometry;
 }
 
 void EffectFrameImpl::setGeometry(const QRect& geometry, bool force)
 {
     QRect oldGeom = m_geometry;
     m_geometry = geometry;
     if (m_geometry == oldGeom && !force) {
         return;
     }
     effects->addRepaint(oldGeom);
     effects->addRepaint(m_geometry);
     if (m_geometry.size() == oldGeom.size() && !force) {
         return;
     }
 
     if (m_style == EffectFrameStyled) {
         qreal left, top, right, bottom;
         m_frame.getMargins(left, top, right, bottom);   // m_geometry is the inner geometry
         m_frame.resizeFrame(m_geometry.adjusted(-left, -top, right, bottom).size());
     }
 
     free();
 }
 
 const QIcon& EffectFrameImpl::icon() const
 {
     return m_icon;
 }
 
 void EffectFrameImpl::setIcon(const QIcon& icon)
 {
     m_icon = icon;
     if (isCrossFade()) {
         m_sceneFrame->crossFadeIcon();
     }
     if (m_iconSize.isEmpty() && !m_icon.availableSizes().isEmpty()) { // Set a size if we don't already have one
         setIconSize(m_icon.availableSizes().first());
     }
     m_sceneFrame->freeIconFrame();
 }
 
 const QSize& EffectFrameImpl::iconSize() const
 {
     return m_iconSize;
 }
 
 void EffectFrameImpl::setIconSize(const QSize& size)
 {
     if (m_iconSize == size) {
         return;
     }
     m_iconSize = size;
     autoResize();
     m_sceneFrame->freeIconFrame();
 }
 
 void EffectFrameImpl::plasmaThemeChanged()
 {
     free();
 }
 
 void EffectFrameImpl::render(QRegion region, double opacity, double frameOpacity)
 {
     if (m_geometry.isEmpty()) {
         return; // Nothing to display
     }
     m_shader = NULL;
     setScreenProjectionMatrix(static_cast<EffectsHandlerImpl*>(effects)->scene()->screenProjectionMatrix());
     effects->paintEffectFrame(this, region, opacity, frameOpacity);
 }
 
 void EffectFrameImpl::finalRender(QRegion region, double opacity, double frameOpacity) const
 {
     region = infiniteRegion(); // TODO: Old region doesn't seem to work with OpenGL
 
     m_sceneFrame->render(region, opacity, frameOpacity);
 }
 
 Qt::Alignment EffectFrameImpl::alignment() const
 {
     return m_alignment;
 }
 
 
 void
 EffectFrameImpl::align(QRect &geometry)
 {
     if (m_alignment & Qt::AlignLeft)
         geometry.moveLeft(m_point.x());
     else if (m_alignment & Qt::AlignRight)
         geometry.moveLeft(m_point.x() - geometry.width());
     else
         geometry.moveLeft(m_point.x() - geometry.width() / 2);
     if (m_alignment & Qt::AlignTop)
         geometry.moveTop(m_point.y());
     else if (m_alignment & Qt::AlignBottom)
         geometry.moveTop(m_point.y() - geometry.height());
     else
         geometry.moveTop(m_point.y() - geometry.height() / 2);
 }
 
 
 void EffectFrameImpl::setAlignment(Qt::Alignment alignment)
 {
     m_alignment = alignment;
     align(m_geometry);
     setGeometry(m_geometry);
 }
 
 void EffectFrameImpl::setPosition(const QPoint& point)
 {
     m_point = point;
     QRect geometry = m_geometry; // this is important, setGeometry need call repaint for old & new geometry
     align(geometry);
     setGeometry(geometry);
 }
 
 const QString& EffectFrameImpl::text() const
 {
     return m_text;
 }
 
 void EffectFrameImpl::setText(const QString& text)
 {
     if (m_text == text) {
         return;
     }
     if (isCrossFade()) {
         m_sceneFrame->crossFadeText();
     }
     m_text = text;
     QRect oldGeom = m_geometry;
     autoResize();
     if (oldGeom == m_geometry) {
         // Wasn't updated in autoResize()
         m_sceneFrame->freeTextFrame();
     }
 }
 
 void EffectFrameImpl::setSelection(const QRect& selection)
 {
     if (selection == m_selectionGeometry) {
         return;
     }
     m_selectionGeometry = selection;
     if (m_selectionGeometry.size() != m_selection.frameSize().toSize()) {
         m_selection.resizeFrame(m_selectionGeometry.size());
     }
     // TODO; optimize to only recreate when resizing
     m_sceneFrame->freeSelection();
 }
 
 void EffectFrameImpl::autoResize()
 {
     if (m_static)
         return; // Not automatically resizing
 
     QRect geometry;
     // Set size
     if (!m_text.isEmpty()) {
         QFontMetrics metrics(m_font);
         geometry.setSize(metrics.size(0, m_text));
     }
     if (!m_icon.isNull() && !m_iconSize.isEmpty()) {
         geometry.setLeft(-m_iconSize.width());
         if (m_iconSize.height() > geometry.height())
             geometry.setHeight(m_iconSize.height());
     }
 
     align(geometry);
     setGeometry(geometry);
 }
 
 QColor EffectFrameImpl::styledTextColor()
 {
     return m_theme->color(Plasma::Theme::TextColor);
 }
 
 } // namespace
diff --git a/effects.h b/effects.h
index b9eb3d36a..92c28c13c 100644
--- a/effects.h
+++ b/effects.h
@@ -1,535 +1,537 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
 Copyright (C) 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 #ifndef KWIN_EFFECTSIMPL_H
 #define KWIN_EFFECTSIMPL_H
 
 #include "kwineffects.h"
 
 #include "client.h"
 #include "scene.h"
 #include "xcbutils.h"
 
 #include <QHash>
 #include <Plasma/FrameSvg>
 
 namespace Plasma {
 class Theme;
 }
 
 namespace KWayland
 {
 namespace Server
 {
 class Display;
 }
 }
 
 class QDBusPendingCallWatcher;
 class QDBusServiceWatcher;
 
 
 namespace KWin
 {
 
 class AbstractThumbnailItem;
 class DesktopThumbnailItem;
 class WindowThumbnailItem;
 
 class Client;
 class Compositor;
 class Deleted;
 class EffectLoader;
+class EffectsMouseInterceptionX11Filter;
 class Unmanaged;
 
 class KWIN_EXPORT EffectsHandlerImpl : public EffectsHandler
 {
     Q_OBJECT
     Q_CLASSINFO("D-Bus Interface", "org.kde.kwin.Effects")
     Q_PROPERTY(QStringList activeEffects READ activeEffects)
     Q_PROPERTY(QStringList loadedEffects READ loadedEffects)
     Q_PROPERTY(QStringList listOfEffects READ listOfEffects)
 public:
     EffectsHandlerImpl(Compositor *compositor, Scene *scene);
     virtual ~EffectsHandlerImpl();
     void prePaintScreen(ScreenPrePaintData& data, int time) override;
     void paintScreen(int mask, QRegion region, ScreenPaintData& data) override;
     /**
      * Special hook to perform a paintScreen but just with the windows on @p desktop.
      **/
     void paintDesktop(int desktop, int mask, QRegion region, ScreenPaintData& data);
     void postPaintScreen() override;
     void prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time) override;
     void paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data) override;
     void postPaintWindow(EffectWindow* w) override;
     void paintEffectFrame(EffectFrame* frame, QRegion region, double opacity, double frameOpacity) override;
 
     Effect *provides(Effect::Feature ef);
 
     void drawWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data) override;
 
     void buildQuads(EffectWindow* w, WindowQuadList& quadList) override;
 
     void activateWindow(EffectWindow* c) override;
     EffectWindow* activeWindow() const override;
     void moveWindow(EffectWindow* w, const QPoint& pos, bool snap = false, double snapAdjust = 1.0) override;
     void windowToDesktop(EffectWindow* w, int desktop) override;
     void windowToScreen(EffectWindow* w, int screen) override;
     void setShowingDesktop(bool showing) override;
 
     QString currentActivity() const override;
     int currentDesktop() const override;
     int numberOfDesktops() const override;
     void setCurrentDesktop(int desktop) override;
     void setNumberOfDesktops(int desktops) override;
     QSize desktopGridSize() const override;
     int desktopGridWidth() const override;
     int desktopGridHeight() const override;
     int workspaceWidth() const override;
     int workspaceHeight() const override;
     int desktopAtCoords(QPoint coords) const override;
     QPoint desktopGridCoords(int id) const override;
     QPoint desktopCoords(int id) const override;
     int desktopAbove(int desktop = 0, bool wrap = true) const override;
     int desktopToRight(int desktop = 0, bool wrap = true) const override;
     int desktopBelow(int desktop = 0, bool wrap = true) const override;
     int desktopToLeft(int desktop = 0, bool wrap = true) const override;
     QString desktopName(int desktop) const override;
     bool optionRollOverDesktops() const override;
 
     QPoint cursorPos() const override;
     bool grabKeyboard(Effect* effect) override;
     void ungrabKeyboard() override;
     // not performing XGrabPointer
     void startMouseInterception(Effect *effect, Qt::CursorShape shape) override;
     void stopMouseInterception(Effect *effect) override;
     bool isMouseInterception() const;
     void registerGlobalShortcut(const QKeySequence &shortcut, QAction *action) override;
     void registerPointerShortcut(Qt::KeyboardModifiers modifiers, Qt::MouseButton pointerButtons, QAction *action) override;
     void registerAxisShortcut(Qt::KeyboardModifiers modifiers, PointerAxisDirection axis, QAction *action) override;
     void registerTouchpadSwipeShortcut(SwipeDirection direction, QAction *action) override;
     void* getProxy(QString name) override;
     void startMousePolling() override;
     void stopMousePolling() override;
     EffectWindow* findWindow(WId id) const override;
     EffectWindow* findWindow(KWayland::Server::SurfaceInterface *surf) const override;
     EffectWindowList stackingOrder() const override;
     void setElevatedWindow(KWin::EffectWindow* w, bool set) override;
 
     void setTabBoxWindow(EffectWindow*) override;
     void setTabBoxDesktop(int) override;
     EffectWindowList currentTabBoxWindowList() const override;
     void refTabBox() override;
     void unrefTabBox() override;
     void closeTabBox() override;
     QList< int > currentTabBoxDesktopList() const override;
     int currentTabBoxDesktop() const override;
     EffectWindow* currentTabBoxWindow() const override;
 
     void setActiveFullScreenEffect(Effect* e) override;
     Effect* activeFullScreenEffect() const override;
 
     void addRepaintFull() override;
     void addRepaint(const QRect& r) override;
     void addRepaint(const QRegion& r) override;
     void addRepaint(int x, int y, int w, int h) override;
     int activeScreen() const override;
     int numScreens() const override;
     int screenNumber(const QPoint& pos) const override;
     QRect clientArea(clientAreaOption, int screen, int desktop) const override;
     QRect clientArea(clientAreaOption, const EffectWindow* c) const override;
     QRect clientArea(clientAreaOption, const QPoint& p, int desktop) const override;
     QSize virtualScreenSize() const override;
     QRect virtualScreenGeometry() const override;
     double animationTimeFactor() const override;
     WindowQuadType newWindowQuadType() override;
 
     void defineCursor(Qt::CursorShape shape) override;
     bool checkInputWindowEvent(xcb_button_press_event_t *e);
     bool checkInputWindowEvent(xcb_motion_notify_event_t *e);
     bool checkInputWindowEvent(QMouseEvent *e);
     bool checkInputWindowEvent(QWheelEvent *e);
     void checkInputWindowStacking();
 
     void reserveElectricBorder(ElectricBorder border, Effect *effect) override;
     void unreserveElectricBorder(ElectricBorder border, Effect *effect) override;
 
     void registerTouchBorder(ElectricBorder border, QAction *action) override;
     void unregisterTouchBorder(ElectricBorder border, QAction *action) override;
 
     unsigned long xrenderBufferPicture() override;
     QPainter* scenePainter() override;
     void reconfigure() override;
     QByteArray readRootProperty(long atom, long type, int format) const override;
     xcb_atom_t announceSupportProperty(const QByteArray& propertyName, Effect* effect) override;
     void removeSupportProperty(const QByteArray& propertyName, Effect* effect) override;
 
     bool hasDecorationShadows() const override;
 
     bool decorationsHaveAlpha() const override;
 
     bool decorationSupportsBlurBehind() const override;
 
     EffectFrame* effectFrame(EffectFrameStyle style, bool staticSize, const QPoint& position, Qt::Alignment alignment) const override;
 
     QVariant kwinOption(KWinOption kwopt) override;
     bool isScreenLocked() const override;
 
     bool makeOpenGLContextCurrent() override;
     void doneOpenGLContextCurrent() override;
 
     xcb_connection_t *xcbConnection() const override;
     xcb_window_t x11RootWindow() const override;
 
     // internal (used by kwin core or compositing code)
     void startPaint();
     void grabbedKeyboardEvent(QKeyEvent* e);
     bool hasKeyboardGrab() const;
     void desktopResized(const QSize &size);
 
     void reloadEffect(Effect *effect) override;
     QStringList loadedEffects() const;
     QStringList listOfEffects() const;
     void unloadAllEffects();
 
     QList<EffectWindow*> elevatedWindows() const;
     QStringList activeEffects() const;
 
     /**
      * @returns Whether we are currently in a desktop rendering process triggered by paintDesktop hook
      **/
     bool isDesktopRendering() const {
         return m_desktopRendering;
     }
     /**
      * @returns the desktop currently being rendered in the paintDesktop hook.
      **/
     int currentRenderedDesktop() const {
         return m_currentRenderedDesktop;
     }
 
     KWayland::Server::Display *waylandDisplay() const override;
 
     bool animationsSupported() const override;
 
     PlatformCursorImage cursorImage() const override;
 
     void hideCursor() override;
     void showCursor() override;
 
     void startInteractiveWindowSelection(std::function<void(KWin::EffectWindow*)> callback) override;
     void startInteractivePositionSelection(std::function<void(const QPoint &)> callback) override;
 
     void showOnScreenMessage(const QString &message, const QString &iconName = QString()) override;
     void hideOnScreenMessage(OnScreenMessageHideFlags flags = OnScreenMessageHideFlags()) override;
 
     KSharedConfigPtr config() const override;
     KSharedConfigPtr inputConfig() const override;
 
     Scene *scene() const {
         return m_scene;
     }
 
     bool touchDown(quint32 id, const QPointF &pos, quint32 time);
     bool touchMotion(quint32 id, const QPointF &pos, quint32 time);
     bool touchUp(quint32 id, quint32 time);
 
     void highlightWindows(const QVector<EffectWindow *> &windows);
 
 public Q_SLOTS:
     void slotCurrentTabAboutToChange(EffectWindow* from, EffectWindow* to);
     void slotTabAdded(EffectWindow* from, EffectWindow* to);
     void slotTabRemoved(EffectWindow* c, EffectWindow* newActiveWindow);
 
     // slots for D-Bus interface
     Q_SCRIPTABLE void reconfigureEffect(const QString& name);
     Q_SCRIPTABLE bool loadEffect(const QString& name);
     Q_SCRIPTABLE void toggleEffect(const QString& name);
     Q_SCRIPTABLE void unloadEffect(const QString& name);
     Q_SCRIPTABLE bool isEffectLoaded(const QString& name) const;
     Q_SCRIPTABLE bool isEffectSupported(const QString& name);
     Q_SCRIPTABLE QList<bool> areEffectsSupported(const QStringList &names);
     Q_SCRIPTABLE QString supportInformation(const QString& name) const;
     Q_SCRIPTABLE QString debug(const QString& name, const QString& parameter = QString()) const;
 
 protected Q_SLOTS:
     void slotClientShown(KWin::Toplevel*);
     void slotShellClientShown(KWin::Toplevel*);
     void slotUnmanagedShown(KWin::Toplevel*);
     void slotWindowClosed(KWin::Toplevel *c, KWin::Deleted *d);
     void slotClientMaximized(KWin::AbstractClient *c, MaximizeMode maxMode);
     void slotOpacityChanged(KWin::Toplevel *t, qreal oldOpacity);
     void slotClientModalityChanged();
     void slotGeometryShapeChanged(KWin::Toplevel *t, const QRect &old);
     void slotPaddingChanged(KWin::Toplevel *t, const QRect &old);
     void slotWindowDamaged(KWin::Toplevel *t, const QRect& r);
     void slotPropertyNotify(KWin::Toplevel *t, long atom);
 
 protected:
     void connectNotify(const QMetaMethod &signal) override;
     void disconnectNotify(const QMetaMethod &signal) override;
     void effectsChanged();
     void setupAbstractClientConnections(KWin::AbstractClient *c);
     void setupClientConnections(KWin::Client *c);
     void setupUnmanagedConnections(KWin::Unmanaged *u);
 
     Effect* keyboard_grab_effect;
     Effect* fullscreen_effect;
     QList<EffectWindow*> elevated_windows;
     QMultiMap< int, EffectPair > effect_order;
     QHash< long, int > registered_atoms;
     int next_window_quad_type;
 
 private:
     void registerPropertyType(long atom, bool reg);
     typedef QVector< Effect*> EffectsList;
     typedef EffectsList::const_iterator EffectsIterator;
     EffectsList m_activeEffects;
     EffectsIterator m_currentDrawWindowIterator;
     EffectsIterator m_currentPaintWindowIterator;
     EffectsIterator m_currentPaintEffectFrameIterator;
     EffectsIterator m_currentPaintScreenIterator;
     EffectsIterator m_currentBuildQuadsIterator;
     typedef QHash< QByteArray, QList< Effect*> > PropertyEffectMap;
     PropertyEffectMap m_propertiesForEffects;
     QHash<QByteArray, qulonglong> m_managedProperties;
     Compositor *m_compositor;
     Scene *m_scene;
     bool m_desktopRendering;
     int m_currentRenderedDesktop;
     Xcb::Window m_mouseInterceptionWindow;
     QList<Effect*> m_grabbedMouseEffects;
     EffectLoader *m_effectLoader;
     int m_trackingCursorChanges;
+    std::unique_ptr<EffectsMouseInterceptionX11Filter> m_x11MouseInterception;
 };
 
 class EffectWindowImpl : public EffectWindow
 {
     Q_OBJECT
 public:
     explicit EffectWindowImpl(Toplevel *toplevel);
     virtual ~EffectWindowImpl();
 
     void enablePainting(int reason) override;
     void disablePainting(int reason) override;
     bool isPaintingEnabled() override;
 
     void refWindow() override;
     void unrefWindow() override;
 
     const EffectWindowGroup* group() const override;
 
     QRegion shape() const override;
     QRect decorationInnerRect() const override;
     QByteArray readProperty(long atom, long type, int format) const override;
     void deleteProperty(long atom) const override;
 
     EffectWindow* findModal() override;
     EffectWindowList mainWindows() const override;
 
     WindowQuadList buildQuads(bool force = false) const override;
 
     void referencePreviousWindowPixmap() override;
     void unreferencePreviousWindowPixmap() override;
 
     const Toplevel* window() const;
     Toplevel* window();
 
     void setWindow(Toplevel* w);   // internal
     void setSceneWindow(Scene::Window* w);   // internal
     const Scene::Window* sceneWindow() const; // internal
     Scene::Window* sceneWindow(); // internal
 
     void elevate(bool elevate);
 
     void setData(int role, const QVariant &data);
     QVariant data(int role) const;
 
     void registerThumbnail(AbstractThumbnailItem *item);
     QHash<WindowThumbnailItem*, QWeakPointer<EffectWindowImpl> > const &thumbnails() const {
         return m_thumbnails;
     }
     QList<DesktopThumbnailItem*> const &desktopThumbnails() const {
         return m_desktopThumbnails;
     }
 private Q_SLOTS:
     void thumbnailDestroyed(QObject *object);
     void thumbnailTargetChanged();
     void desktopThumbnailDestroyed(QObject *object);
 private:
     void insertThumbnail(WindowThumbnailItem *item);
     Toplevel* toplevel;
     Scene::Window* sw; // This one is used only during paint pass.
     QHash<int, QVariant> dataMap;
     QHash<WindowThumbnailItem*, QWeakPointer<EffectWindowImpl> > m_thumbnails;
     QList<DesktopThumbnailItem*> m_desktopThumbnails;
 };
 
 class EffectWindowGroupImpl
     : public EffectWindowGroup
 {
 public:
     explicit EffectWindowGroupImpl(Group* g);
     EffectWindowList members() const override;
 private:
     Group* group;
 };
 
 class KWIN_EXPORT EffectFrameImpl
     : public QObject, public EffectFrame
 {
     Q_OBJECT
 public:
     explicit EffectFrameImpl(EffectFrameStyle style, bool staticSize = true, QPoint position = QPoint(-1, -1),
                              Qt::Alignment alignment = Qt::AlignCenter);
     virtual ~EffectFrameImpl();
 
     void free() override;
     void render(QRegion region = infiniteRegion(), double opacity = 1.0, double frameOpacity = 1.0) override;
     Qt::Alignment alignment() const override;
     void setAlignment(Qt::Alignment alignment) override;
     const QFont& font() const override;
     void setFont(const QFont& font) override;
     const QRect& geometry() const override;
     void setGeometry(const QRect& geometry, bool force = false) override;
     const QIcon& icon() const override;
     void setIcon(const QIcon& icon) override;
     const QSize& iconSize() const override;
     void setIconSize(const QSize& size) override;
     void setPosition(const QPoint& point) override;
     const QString& text() const override;
     void setText(const QString& text) override;
     EffectFrameStyle style() const override {
         return m_style;
     };
     Plasma::FrameSvg& frame() {
         return m_frame;
     }
     bool isStatic() const {
         return m_static;
     };
     void finalRender(QRegion region, double opacity, double frameOpacity) const;
     void setShader(GLShader* shader) override {
         m_shader = shader;
     }
     GLShader* shader() const override {
         return m_shader;
     }
     void setSelection(const QRect& selection) override;
     const QRect& selection() const {
         return m_selectionGeometry;
     }
     Plasma::FrameSvg& selectionFrame() {
         return m_selection;
     }
     /**
      * The foreground text color as specified by the default Plasma theme.
      */
     QColor styledTextColor();
 
 private Q_SLOTS:
     void plasmaThemeChanged();
 
 private:
     Q_DISABLE_COPY(EffectFrameImpl)   // As we need to use Qt slots we cannot copy this class
     void align(QRect &geometry);   // positions geometry around m_point respecting m_alignment
     void autoResize(); // Auto-resize if not a static size
 
     EffectFrameStyle m_style;
     Plasma::FrameSvg m_frame; // TODO: share between all EffectFrames
     Plasma::FrameSvg m_selection;
 
     // Position
     bool m_static;
     QPoint m_point;
     Qt::Alignment m_alignment;
     QRect m_geometry;
 
     // Contents
     QString m_text;
     QFont m_font;
     QIcon m_icon;
     QSize m_iconSize;
     QRect m_selectionGeometry;
 
     Scene::EffectFrame* m_sceneFrame;
     GLShader* m_shader;
 
     Plasma::Theme *m_theme;
 };
 
 inline
 QList<EffectWindow*> EffectsHandlerImpl::elevatedWindows() const
 {
     if (isScreenLocked())
         return QList<EffectWindow*>();
     return elevated_windows;
 }
 
 inline
 xcb_window_t EffectsHandlerImpl::x11RootWindow() const
 {
     return rootWindow();
 }
 
 inline
 xcb_connection_t *EffectsHandlerImpl::xcbConnection() const
 {
     return connection();
 }
 
 inline
 EffectWindowGroupImpl::EffectWindowGroupImpl(Group* g)
     : group(g)
 {
 }
 
 EffectWindow* effectWindow(Toplevel* w);
 EffectWindow* effectWindow(Scene::Window* w);
 
 inline
 const Scene::Window* EffectWindowImpl::sceneWindow() const
 {
     return sw;
 }
 
 inline
 Scene::Window* EffectWindowImpl::sceneWindow()
 {
     return sw;
 }
 
 inline
 const Toplevel* EffectWindowImpl::window() const
 {
     return toplevel;
 }
 
 inline
 Toplevel* EffectWindowImpl::window()
 {
     return toplevel;
 }
 
 
 } // namespace
 
 #endif
diff --git a/effects_mouse_interception_x11_filter.cpp b/effects_mouse_interception_x11_filter.cpp
new file mode 100644
index 000000000..e33dedbaa
--- /dev/null
+++ b/effects_mouse_interception_x11_filter.cpp
@@ -0,0 +1,65 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2017 Martin Flöser <mgraesslin@kde.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+#include "effects_mouse_interception_x11_filter.h"
+#include "effects.h"
+#include "utils.h"
+
+#include <QMouseEvent>
+
+namespace KWin
+{
+
+EffectsMouseInterceptionX11Filter::EffectsMouseInterceptionX11Filter(xcb_window_t window, EffectsHandlerImpl *effects)
+    : X11EventFilter(QVector<int>{XCB_BUTTON_PRESS, XCB_BUTTON_RELEASE, XCB_MOTION_NOTIFY})
+    , m_effects(effects)
+    , m_window(window)
+{
+}
+
+bool EffectsMouseInterceptionX11Filter::event(xcb_generic_event_t *event)
+{
+    const uint8_t eventType = event->response_type & ~0x80;
+    if (eventType == XCB_BUTTON_PRESS || eventType == XCB_BUTTON_RELEASE) {
+        auto *me = reinterpret_cast<xcb_button_press_event_t*>(event);
+        if (m_window == me->event) {
+            const Qt::MouseButton button = x11ToQtMouseButton(me->detail);
+            Qt::MouseButtons buttons = x11ToQtMouseButtons(me->state);
+            const QEvent::Type type = (eventType == XCB_BUTTON_PRESS) ? QEvent::MouseButtonPress : QEvent::MouseButtonRelease;
+            if (type == QEvent::MouseButtonPress) {
+                buttons |= button;
+            } else {
+                buttons &= ~button;
+            }
+            QMouseEvent ev(type, QPoint(me->event_x, me->event_y), QPoint(me->root_x, me->root_y),
+                           button, buttons, x11ToQtKeyboardModifiers(me->state));
+            return m_effects->checkInputWindowEvent(&ev);
+        }
+    } else if (eventType == XCB_MOTION_NOTIFY) {
+        const auto *me = reinterpret_cast<xcb_motion_notify_event_t*>(event);
+        if (m_window == me->event) {
+            QMouseEvent ev(QEvent::MouseMove, QPoint(me->event_x, me->event_y), QPoint(me->root_x, me->root_y),
+                           Qt::NoButton, x11ToQtMouseButtons(me->state), x11ToQtKeyboardModifiers(me->state));
+            return m_effects->checkInputWindowEvent(&ev);
+        }
+    }
+    return false;
+}
+
+}
diff --git a/effects_mouse_interception_x11_filter.h b/effects_mouse_interception_x11_filter.h
new file mode 100644
index 000000000..740a87a3e
--- /dev/null
+++ b/effects_mouse_interception_x11_filter.h
@@ -0,0 +1,43 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2017 Martin Flöser <mgraesslin@kde.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+#ifndef KWIN_EFFECTS_MOUSE_INTERCEPTION_X11_FILTER_H
+#define KWIN_EFFECTS_MOUSE_INTERCEPTION_X11_FILTER_H
+
+#include "x11eventfilter.h"
+
+namespace KWin
+{
+class EffectsHandlerImpl;
+
+class EffectsMouseInterceptionX11Filter : public X11EventFilter
+{
+public:
+    explicit EffectsMouseInterceptionX11Filter(xcb_window_t window, EffectsHandlerImpl *effects);
+
+    bool event(xcb_generic_event_t *event) override;
+
+private:
+    EffectsHandlerImpl *m_effects;
+    xcb_window_t m_window;
+};
+
+}
+
+#endif
diff --git a/events.cpp b/events.cpp
index 5f8ea61a6..61527446d 100644
--- a/events.cpp
+++ b/events.cpp
@@ -1,1411 +1,1392 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 /*
 
  This file contains things relevant to handling incoming events.
 
 */
 
 #include "client.h"
 #include "cursor.h"
 #include "focuschain.h"
 #include "netinfo.h"
 #include "workspace.h"
 #include "atoms.h"
 #ifdef KWIN_BUILD_TABBOX
 #include "tabbox.h"
 #endif
 #include "group.h"
 #include "rules.h"
 #include "unmanaged.h"
 #include "useractions.h"
 #include "effects.h"
 #include "screens.h"
 #include "xcbutils.h"
 
 #include <KDecoration2/Decoration>
 
 #include <QApplication>
 #include <QDebug>
 #include <QHoverEvent>
 #include <QKeyEvent>
 #include <QMouseEvent>
 #include <QStyleHints>
 #include <QWheelEvent>
 
 #include <kkeyserver.h>
 
 #include <xcb/sync.h>
 #ifdef XCB_ICCCM_FOUND
 #include <xcb/xcb_icccm.h>
 #endif
 
 #include "composite.h"
 #include "x11eventfilter.h"
 
 #include "wayland_server.h"
 #include <KWayland/Server/surface_interface.h>
 
 #ifndef XCB_GE_GENERIC
 #define XCB_GE_GENERIC 35
 typedef struct xcb_ge_generic_event_t {
     uint8_t  response_type; /**<  */
     uint8_t  extension; /**<  */
     uint16_t sequence; /**<  */
     uint32_t length; /**<  */
     uint16_t event_type; /**<  */
     uint8_t  pad0[22]; /**<  */
     uint32_t full_sequence; /**<  */
 } xcb_ge_generic_event_t;
 #endif
 
 namespace KWin
 {
 
 // ****************************************
 // Workspace
 // ****************************************
 
 static xcb_window_t findEventWindow(xcb_generic_event_t *event)
 {
     const uint8_t eventType = event->response_type & ~0x80;
     switch(eventType) {
     case XCB_KEY_PRESS:
     case XCB_KEY_RELEASE:
         return reinterpret_cast<xcb_key_press_event_t*>(event)->event;
     case XCB_BUTTON_PRESS:
     case XCB_BUTTON_RELEASE:
         return reinterpret_cast<xcb_button_press_event_t*>(event)->event;
     case XCB_MOTION_NOTIFY:
         return reinterpret_cast<xcb_motion_notify_event_t*>(event)->event;
     case XCB_ENTER_NOTIFY:
     case XCB_LEAVE_NOTIFY:
         return reinterpret_cast<xcb_enter_notify_event_t*>(event)->event;
     case XCB_FOCUS_IN:
     case XCB_FOCUS_OUT:
         return reinterpret_cast<xcb_focus_in_event_t*>(event)->event;
     case XCB_EXPOSE:
         return reinterpret_cast<xcb_expose_event_t*>(event)->window;
     case XCB_GRAPHICS_EXPOSURE:
         return reinterpret_cast<xcb_graphics_exposure_event_t*>(event)->drawable;
     case XCB_NO_EXPOSURE:
         return reinterpret_cast<xcb_no_exposure_event_t*>(event)->drawable;
     case XCB_VISIBILITY_NOTIFY:
         return reinterpret_cast<xcb_visibility_notify_event_t*>(event)->window;
     case XCB_CREATE_NOTIFY:
         return reinterpret_cast<xcb_create_notify_event_t*>(event)->window;
     case XCB_DESTROY_NOTIFY:
         return reinterpret_cast<xcb_destroy_notify_event_t*>(event)->window;
     case XCB_UNMAP_NOTIFY:
         return reinterpret_cast<xcb_unmap_notify_event_t*>(event)->window;
     case XCB_MAP_NOTIFY:
         return reinterpret_cast<xcb_map_notify_event_t*>(event)->window;
     case XCB_MAP_REQUEST:
         return reinterpret_cast<xcb_map_request_event_t*>(event)->window;
     case XCB_REPARENT_NOTIFY:
         return reinterpret_cast<xcb_reparent_notify_event_t*>(event)->window;
     case XCB_CONFIGURE_NOTIFY:
         return reinterpret_cast<xcb_configure_notify_event_t*>(event)->window;
     case XCB_CONFIGURE_REQUEST:
         return reinterpret_cast<xcb_configure_request_event_t*>(event)->window;
     case XCB_GRAVITY_NOTIFY:
         return reinterpret_cast<xcb_gravity_notify_event_t*>(event)->window;
     case XCB_RESIZE_REQUEST:
         return reinterpret_cast<xcb_resize_request_event_t*>(event)->window;
     case XCB_CIRCULATE_NOTIFY:
     case XCB_CIRCULATE_REQUEST:
         return reinterpret_cast<xcb_circulate_notify_event_t*>(event)->window;
     case XCB_PROPERTY_NOTIFY:
         return reinterpret_cast<xcb_property_notify_event_t*>(event)->window;
     case XCB_COLORMAP_NOTIFY:
         return reinterpret_cast<xcb_colormap_notify_event_t*>(event)->window;
     case XCB_CLIENT_MESSAGE:
         return reinterpret_cast<xcb_client_message_event_t*>(event)->window;
     default:
         // extension handling
         if (eventType == Xcb::Extensions::self()->shapeNotifyEvent()) {
             return reinterpret_cast<xcb_shape_notify_event_t*>(event)->affected_window;
         }
         if (eventType == Xcb::Extensions::self()->damageNotifyEvent()) {
             return reinterpret_cast<xcb_damage_notify_event_t*>(event)->drawable;
         }
         return XCB_WINDOW_NONE;
     }
 }
 
 QVector<QByteArray> s_xcbEerrors({
     QByteArrayLiteral("Success"),
     QByteArrayLiteral("BadRequest"),
     QByteArrayLiteral("BadValue"),
     QByteArrayLiteral("BadWindow"),
     QByteArrayLiteral("BadPixmap"),
     QByteArrayLiteral("BadAtom"),
     QByteArrayLiteral("BadCursor"),
     QByteArrayLiteral("BadFont"),
     QByteArrayLiteral("BadMatch"),
     QByteArrayLiteral("BadDrawable"),
     QByteArrayLiteral("BadAccess"),
     QByteArrayLiteral("BadAlloc"),
     QByteArrayLiteral("BadColor"),
     QByteArrayLiteral("BadGC"),
     QByteArrayLiteral("BadIDChoice"),
     QByteArrayLiteral("BadName"),
     QByteArrayLiteral("BadLength"),
     QByteArrayLiteral("BadImplementation"),
     QByteArrayLiteral("Unknown")});
 
 
 void Workspace::registerEventFilter(X11EventFilter *filter)
 {
     if (filter->isGenericEvent())
         m_genericEventFilters.append(filter);
     else
         m_eventFilters.append(filter);
 }
 
 void Workspace::unregisterEventFilter(X11EventFilter *filter)
 {
     if (filter->isGenericEvent())
         m_genericEventFilters.removeOne(filter);
     else
         m_eventFilters.removeOne(filter);
 }
 
 
 /*!
   Handles workspace specific XCB event
  */
 bool Workspace::workspaceEvent(xcb_generic_event_t *e)
 {
     const uint8_t eventType = e->response_type & ~0x80;
     if (!eventType) {
         // let's check whether it's an error from one of the extensions KWin uses
         xcb_generic_error_t *error = reinterpret_cast<xcb_generic_error_t*>(e);
         const QVector<Xcb::ExtensionData> extensions = Xcb::Extensions::self()->extensions();
         for (const auto &extension : extensions) {
             if (error->major_code == extension.majorOpcode) {
                 QByteArray errorName;
                 if (error->error_code < s_xcbEerrors.size()) {
                     errorName = s_xcbEerrors.at(error->error_code);
                 } else if (error->error_code >= extension.errorBase) {
                     const int index = error->error_code - extension.errorBase;
                     if (index >= 0 && index < extension.errorCodes.size()) {
                         errorName = extension.errorCodes.at(index);
                     }
                 }
                 if (errorName.isEmpty()) {
                     errorName = QByteArrayLiteral("Unknown");
                 }
                 qCWarning(KWIN_CORE, "XCB error: %d (%s), sequence: %d, resource id: %d, major code: %d (%s), minor code: %d (%s)",
                          int(error->error_code), errorName.constData(),
                          int(error->sequence), int(error->resource_id),
                          int(error->major_code), extension.name.constData(),
                          int(error->minor_code),
                          extension.opCodes.size() > error->minor_code ? extension.opCodes.at(error->minor_code).constData() : "Unknown");
                 return true;
             }
         }
         return false;
     }
 
     if (eventType == XCB_GE_GENERIC) {
         xcb_ge_generic_event_t *ge = reinterpret_cast<xcb_ge_generic_event_t *>(e);
 
         foreach (X11EventFilter *filter, m_genericEventFilters) {
             if (filter->extension() == ge->extension && filter->genericEventTypes().contains(ge->event_type) && filter->event(e)) {
                 return true;
             }
         }
     } else {
         foreach (X11EventFilter *filter, m_eventFilters) {
             if (filter->eventTypes().contains(eventType) && filter->event(e)) {
                 return true;
             }
         }
     }
 
     if (effects && static_cast< EffectsHandlerImpl* >(effects)->hasKeyboardGrab()
             && (eventType == XCB_KEY_PRESS || eventType == XCB_KEY_RELEASE))
         return false; // let Qt process it, it'll be intercepted again in eventFilter()
 
     if (eventType == XCB_PROPERTY_NOTIFY || eventType == XCB_CLIENT_MESSAGE) {
         NET::Properties dirtyProtocols;
         NET::Properties2 dirtyProtocols2;
         rootInfo()->event(e, &dirtyProtocols, &dirtyProtocols2);
         if (dirtyProtocols & NET::DesktopNames)
             VirtualDesktopManager::self()->save();
         if (dirtyProtocols2 & NET::WM2DesktopLayout)
             VirtualDesktopManager::self()->updateLayout();
     }
 
     // events that should be handled before Clients can get them
     switch (eventType) {
-    case XCB_BUTTON_PRESS:
-    case XCB_BUTTON_RELEASE: {
-        auto *mouseEvent = reinterpret_cast<xcb_button_press_event_t*>(e);
-        if (effects && static_cast<EffectsHandlerImpl*>(effects)->checkInputWindowEvent(mouseEvent)) {
-            return true;
-        }
-        break;
-    }
-    case XCB_MOTION_NOTIFY: {
-        if (kwinApp()->operationMode() != Application::OperationModeX11) {
-            // ignore X11 pointer events generated on X windows if we are not on X
-            return true;
-        }
-        auto *mouseEvent = reinterpret_cast<xcb_motion_notify_event_t*>(e);
-        if (effects && static_cast<EffectsHandlerImpl*>(effects)->checkInputWindowEvent(mouseEvent)) {
-            return true;
-        }
-        break;
-    }
     case XCB_CONFIGURE_NOTIFY:
         if (reinterpret_cast<xcb_configure_notify_event_t*>(e)->event == rootWindow())
             markXStackingOrderAsDirty();
         break;
     };
 
     const xcb_window_t eventWindow = findEventWindow(e);
     if (eventWindow != XCB_WINDOW_NONE) {
         if (Client* c = findClient(Predicate::WindowMatch, eventWindow)) {
             if (c->windowEvent(e))
                 return true;
         } else if (Client* c = findClient(Predicate::WrapperIdMatch, eventWindow)) {
             if (c->windowEvent(e))
                 return true;
         } else if (Client* c = findClient(Predicate::FrameIdMatch, eventWindow)) {
             if (c->windowEvent(e))
                 return true;
         } else if (Client *c = findClient(Predicate::InputIdMatch, eventWindow)) {
             if (c->windowEvent(e))
                 return true;
         } else if (Unmanaged* c = findUnmanaged(eventWindow)) {
             if (c->windowEvent(e))
                 return true;
         } else {
             // We want to pass root window property events to effects
             if (eventType == XCB_PROPERTY_NOTIFY) {
                 auto *event = reinterpret_cast<xcb_property_notify_event_t*>(e);
                 if (event->window == rootWindow()) {
                     emit propertyNotify(event->atom);
                 }
             }
         }
     }
 
     switch (eventType) {
     case XCB_CREATE_NOTIFY: {
         const auto *event = reinterpret_cast<xcb_create_notify_event_t*>(e);
         if (event->parent == rootWindow() &&
                 !QWidget::find(event->window) &&
                 !event->override_redirect) {
             // see comments for allowClientActivation()
             updateXTime();
             const xcb_timestamp_t t = xTime();
             xcb_change_property(connection(), XCB_PROP_MODE_REPLACE, event->window, atoms->kde_net_wm_user_creation_time, XCB_ATOM_CARDINAL, 32, 1, &t);
         }
         break;
     }
     case XCB_UNMAP_NOTIFY: {
         const auto *event = reinterpret_cast<xcb_unmap_notify_event_t*>(e);
         return (event->event != event->window);   // hide wm typical event from Qt
     }
     case XCB_REPARENT_NOTIFY: {
         //do not confuse Qt with these events. After all, _we_ are the
         //window manager who does the reparenting.
         return true;
     }
     case XCB_DESTROY_NOTIFY: {
         return false;
     }
     case XCB_MAP_REQUEST: {
         updateXTime();
 
         const auto *event = reinterpret_cast<xcb_map_request_event_t*>(e);
         if (Client* c = findClient(Predicate::WindowMatch, event->window)) {
             // e->xmaprequest.window is different from e->xany.window
             // TODO this shouldn't be necessary now
             c->windowEvent(e);
             FocusChain::self()->update(c, FocusChain::Update);
         } else if ( true /*|| e->xmaprequest.parent != root */ ) {
             // NOTICE don't check for the parent being the root window, this breaks when some app unmaps
             // a window, changes something and immediately maps it back, without giving KWin
             // a chance to reparent it back to root
             // since KWin can get MapRequest only for root window children and
             // children of WindowWrapper (=clients), the check is AFAIK useless anyway
             // NOTICE: The save-set support in Client::mapRequestEvent() actually requires that
             // this code doesn't check the parent to be root.
             if (!createClient(event->window, false)) {
                 xcb_map_window(connection(), event->window);
                 const uint32_t values[] = { XCB_STACK_MODE_ABOVE };
                 xcb_configure_window(connection(), event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
             }
         }
         return true;
     }
     case XCB_MAP_NOTIFY: {
         const auto *event = reinterpret_cast<xcb_map_notify_event_t*>(e);
         if (event->override_redirect) {
             Unmanaged* c = findUnmanaged(event->window);
             if (c == NULL)
                 c = createUnmanaged(event->window);
             if (c)
                 return c->windowEvent(e);
         }
         return (event->event != event->window);   // hide wm typical event from Qt
     }
 
     case XCB_CONFIGURE_REQUEST: {
         const auto *event = reinterpret_cast<xcb_configure_request_event_t*>(e);
         if (event->parent == rootWindow()) {
             uint32_t values[5] = { 0, 0, 0, 0, 0};
             const uint32_t value_mask = event->value_mask
                                         & (XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT | XCB_CONFIG_WINDOW_BORDER_WIDTH);
             int i = 0;
             if (value_mask & XCB_CONFIG_WINDOW_X) {
                 values[i++] = event->x;
             }
             if (value_mask & XCB_CONFIG_WINDOW_Y) {
                 values[i++] = event->y;
             }
             if (value_mask & XCB_CONFIG_WINDOW_WIDTH) {
                 values[i++] = event->width;
             }
             if (value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
                 values[i++] = event->height;
             }
             if (value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH) {
                 values[i++] = event->border_width;
             }
             xcb_configure_window(connection(), event->window, value_mask, values);
             return true;
         }
         break;
     }
     case XCB_FOCUS_IN: {
         const auto *event = reinterpret_cast<xcb_focus_in_event_t*>(e);
         if (event->event == rootWindow()
                 && (event->detail == XCB_NOTIFY_DETAIL_NONE || event->detail == XCB_NOTIFY_DETAIL_POINTER_ROOT || event->detail == XCB_NOTIFY_DETAIL_INFERIOR)) {
             Xcb::CurrentInput currentInput;
             updateXTime(); // focusToNull() uses xTime(), which is old now (FocusIn has no timestamp)
             // it seems we can "loose" focus reversions when the closing client hold a grab
             // => catch the typical pattern (though we don't want the focus on the root anyway) #348935
             const bool lostFocusPointerToRoot = currentInput->focus == rootWindow() && event->detail == XCB_NOTIFY_DETAIL_INFERIOR;
             if (!currentInput.isNull() && (currentInput->focus == XCB_WINDOW_NONE || currentInput->focus == XCB_INPUT_FOCUS_POINTER_ROOT || lostFocusPointerToRoot)) {
                 //kWarning( 1212 ) << "X focus set to None/PointerRoot, reseting focus" ;
                 AbstractClient *c = mostRecentlyActivatedClient();
                 if (c != NULL)
                     requestFocus(c, true);
                 else if (activateNextClient(NULL))
                     ; // ok, activated
                 else
                     focusToNull();
             }
         }
     }
         // fall through
     case XCB_FOCUS_OUT:
         return true; // always eat these, they would tell Qt that KWin is the active app
     default:
         if (eventType == Xcb::Extensions::self()->syncAlarmNotifyEvent() && Xcb::Extensions::self()->isSyncAvailable()) {
             for (Client *c : clients)
                 c->syncEvent(reinterpret_cast< xcb_sync_alarm_notify_event_t* >(e));
             for (Client *c : desktops)
                 c->syncEvent(reinterpret_cast< xcb_sync_alarm_notify_event_t* >(e));
         } else if (eventType == Xcb::Extensions::self()->fixesCursorNotifyEvent() && Xcb::Extensions::self()->isFixesAvailable()) {
             Cursor::self()->notifyCursorChanged(reinterpret_cast<xcb_xfixes_cursor_notify_event_t*>(e)->cursor_serial);
         }
         break;
     }
     return false;
 }
 
 // Used only to filter events that need to be processed by Qt first
 // (e.g. keyboard input to be composed), otherwise events are
 // handle by the XEvent filter above
 bool Workspace::workspaceEvent(QEvent* e)
 {
     if ((e->type() == QEvent::KeyPress || e->type() == QEvent::KeyRelease || e->type() == QEvent::ShortcutOverride)
             && effects && static_cast< EffectsHandlerImpl* >(effects)->hasKeyboardGrab()) {
         static_cast< EffectsHandlerImpl* >(effects)->grabbedKeyboardEvent(static_cast< QKeyEvent* >(e));
         return true;
     }
     return false;
 }
 
 // ****************************************
 // Client
 // ****************************************
 
 /*!
   General handler for XEvents concerning the client window
  */
 bool Client::windowEvent(xcb_generic_event_t *e)
 {
     if (findEventWindow(e) == window()) { // avoid doing stuff on frame or wrapper
         NET::Properties dirtyProperties;
         NET::Properties2 dirtyProperties2;
         double old_opacity = opacity();
         info->event(e, &dirtyProperties, &dirtyProperties2);   // pass through the NET stuff
 
         if ((dirtyProperties & NET::WMName) != 0)
             fetchName();
         if ((dirtyProperties & NET::WMIconName) != 0)
             fetchIconicName();
         if ((dirtyProperties & NET::WMStrut) != 0
                 || (dirtyProperties2 & NET::WM2ExtendedStrut) != 0) {
             workspace()->updateClientArea();
         }
         if ((dirtyProperties & NET::WMIcon) != 0)
             getIcons();
         // Note there's a difference between userTime() and info->userTime()
         // info->userTime() is the value of the property, userTime() also includes
         // updates of the time done by KWin (ButtonPress on windowrapper etc.).
         if ((dirtyProperties2 & NET::WM2UserTime) != 0) {
             workspace()->setWasUserInteraction();
             updateUserTime(info->userTime());
         }
         if ((dirtyProperties2 & NET::WM2StartupId) != 0)
             startupIdChanged();
         if (dirtyProperties2 & NET::WM2Opacity) {
             if (compositing()) {
                 addRepaintFull();
                 emit opacityChanged(this, old_opacity);
             } else {
                 // forward to the frame if there's possibly another compositing manager running
                 NETWinInfo i(connection(), frameId(), rootWindow(), 0, 0);
                 i.setOpacity(info->opacity());
             }
         }
         if (dirtyProperties2 & NET::WM2FrameOverlap) {
             // ### Inform the decoration
         }
         if (dirtyProperties2.testFlag(NET::WM2WindowRole)) {
             emit windowRoleChanged();
         }
         if (dirtyProperties2.testFlag(NET::WM2WindowClass)) {
             getResourceClass();
         }
         if (dirtyProperties2.testFlag(NET::WM2BlockCompositing)) {
             setBlockingCompositing(info->isBlockingCompositing());
         }
         if (dirtyProperties2.testFlag(NET::WM2GroupLeader)) {
             checkGroup();
             updateAllowedActions(); // Group affects isMinimizable()
         }
         if (dirtyProperties2.testFlag(NET::WM2Urgency)) {
             updateUrgency();
         }
         if (dirtyProperties2 & NET::WM2OpaqueRegion) {
             getWmOpaqueRegion();
         }
         if (dirtyProperties2 & NET::WM2DesktopFileName) {
             setDesktopFileName(QByteArray(info->desktopFileName()));
         }
     }
 
     const uint8_t eventType = e->response_type & ~0x80;
     switch(eventType) {
     case XCB_UNMAP_NOTIFY:
         unmapNotifyEvent(reinterpret_cast<xcb_unmap_notify_event_t*>(e));
         break;
     case XCB_DESTROY_NOTIFY:
         destroyNotifyEvent(reinterpret_cast<xcb_destroy_notify_event_t*>(e));
         break;
     case XCB_MAP_REQUEST:
         // this one may pass the event to workspace
         return mapRequestEvent(reinterpret_cast<xcb_map_request_event_t*>(e));
     case XCB_CONFIGURE_REQUEST:
         configureRequestEvent(reinterpret_cast<xcb_configure_request_event_t*>(e));
         break;
     case XCB_PROPERTY_NOTIFY:
         propertyNotifyEvent(reinterpret_cast<xcb_property_notify_event_t*>(e));
         break;
     case XCB_KEY_PRESS:
         updateUserTime(reinterpret_cast<xcb_key_press_event_t*>(e)->time);
         break;
     case XCB_BUTTON_PRESS: {
         const auto *event = reinterpret_cast<xcb_button_press_event_t*>(e);
         updateUserTime(event->time);
         buttonPressEvent(event->event, event->detail, event->state,
                          event->event_x, event->event_y, event->root_x, event->root_y, event->time);
         break;
     }
     case XCB_KEY_RELEASE:
         // don't update user time on releases
         // e.g. if the user presses Alt+F2, the Alt release
         // would appear as user input to the currently active window
         break;
     case XCB_BUTTON_RELEASE: {
         const auto *event = reinterpret_cast<xcb_button_release_event_t*>(e);
         // don't update user time on releases
         // e.g. if the user presses Alt+F2, the Alt release
         // would appear as user input to the currently active window
         buttonReleaseEvent(event->event, event->detail, event->state,
                            event->event_x, event->event_y, event->root_x, event->root_y);
         break;
     }
     case XCB_MOTION_NOTIFY: {
         const auto *event = reinterpret_cast<xcb_motion_notify_event_t*>(e);
         motionNotifyEvent(event->event, event->state,
                           event->event_x, event->event_y, event->root_x, event->root_y);
         workspace()->updateFocusMousePosition(QPoint(event->root_x, event->root_y));
         break;
     }
     case XCB_ENTER_NOTIFY: {
         auto *event = reinterpret_cast<xcb_enter_notify_event_t*>(e);
         enterNotifyEvent(event);
         // MotionNotify is guaranteed to be generated only if the mouse
         // move start and ends in the window; for cases when it only
         // starts or only ends there, Enter/LeaveNotify are generated.
         // Fake a MotionEvent in such cases to make handle of mouse
         // events simpler (Qt does that too).
         motionNotifyEvent(event->event, event->state,
                           event->event_x, event->event_y, event->root_x, event->root_y);
         workspace()->updateFocusMousePosition(QPoint(event->root_x, event->root_y));
         break;
     }
     case XCB_LEAVE_NOTIFY: {
         auto *event = reinterpret_cast<xcb_leave_notify_event_t*>(e);
         motionNotifyEvent(event->event, event->state,
                           event->event_x, event->event_y, event->root_x, event->root_y);
         leaveNotifyEvent(event);
         // not here, it'd break following enter notify handling
         // workspace()->updateFocusMousePosition( QPoint( e->xcrossing.x_root, e->xcrossing.y_root ));
         break;
     }
     case XCB_FOCUS_IN:
         focusInEvent(reinterpret_cast<xcb_focus_in_event_t*>(e));
         break;
     case XCB_FOCUS_OUT:
         focusOutEvent(reinterpret_cast<xcb_focus_out_event_t*>(e));
         break;
     case XCB_REPARENT_NOTIFY:
         break;
     case XCB_CLIENT_MESSAGE:
         clientMessageEvent(reinterpret_cast<xcb_client_message_event_t*>(e));
         break;
     case XCB_EXPOSE: {
         xcb_expose_event_t *event = reinterpret_cast<xcb_expose_event_t*>(e);
         if (event->window == frameId() && !Compositor::self()->isActive()) {
             // TODO: only repaint required areas
             triggerDecorationRepaint();
         }
         break;
     }
     default:
         if (eventType == Xcb::Extensions::self()->shapeNotifyEvent() && reinterpret_cast<xcb_shape_notify_event_t*>(e)->affected_window == window()) {
             detectShape(window());  // workaround for #19644
             updateShape();
         }
         if (eventType == Xcb::Extensions::self()->damageNotifyEvent() && reinterpret_cast<xcb_damage_notify_event_t*>(e)->drawable == frameId())
             damageNotifyEvent();
         break;
     }
     return true; // eat all events
 }
 
 /*!
   Handles map requests of the client window
  */
 bool Client::mapRequestEvent(xcb_map_request_event_t *e)
 {
     if (e->window != window()) {
         // Special support for the save-set feature, which is a bit broken.
         // If there's a window from one client embedded in another one,
         // e.g. using XEMBED, and the embedder suddenly loses its X connection,
         // save-set will reparent the embedded window to its closest ancestor
         // that will remains. Unfortunately, with reparenting window managers,
         // this is not the root window, but the frame (or in KWin's case,
         // it's the wrapper for the client window). In this case,
         // the wrapper will get ReparentNotify for a window it won't know,
         // which will be ignored, and then it gets MapRequest, as save-set
         // always maps. Returning true here means that Workspace::workspaceEvent()
         // will handle this MapRequest and manage this window (i.e. act as if
         // it was reparented to root window).
         if (e->parent == wrapperId())
             return false;
         return true; // no messing with frame etc.
     }
     // also copied in clientMessage()
     if (isMinimized())
         unminimize();
     if (isShade())
         setShade(ShadeNone);
     if (!isOnCurrentDesktop()) {
         if (workspace()->allowClientActivation(this))
             workspace()->activateClient(this);
         else
             demandAttention();
     }
     return true;
 }
 
 /*!
   Handles unmap notify events of the client window
  */
 void Client::unmapNotifyEvent(xcb_unmap_notify_event_t *e)
 {
     if (e->window != window())
         return;
     if (e->event != wrapperId()) {
         // most probably event from root window when initially reparenting
         bool ignore = true;
         if (e->event == rootWindow() && (e->response_type & 0x80))
             ignore = false; // XWithdrawWindow()
         if (ignore)
             return;
     }
 
     // check whether this is result of an XReparentWindow - client then won't be parented by wrapper
     // in this case do not release the client (causes reparent to root, removal from saveSet and what not)
     // but just destroy the client
     Xcb::Tree tree(m_client);
     xcb_window_t daddy = tree.parent();
     if (daddy == m_wrapper) {
         releaseWindow(); // unmapped from a regular client state
     } else {
         destroyClient(); // the client was moved to some other parent
     }
 }
 
 void Client::destroyNotifyEvent(xcb_destroy_notify_event_t *e)
 {
     if (e->window != window())
         return;
     destroyClient();
 }
 
 
 /*!
    Handles client messages for the client window
 */
 void Client::clientMessageEvent(xcb_client_message_event_t *e)
 {
     Toplevel::clientMessageEvent(e);
     if (e->window != window())
         return; // ignore frame/wrapper
     // WM_STATE
     if (e->type == atoms->wm_change_state) {
         if (e->data.data32[0] == XCB_ICCCM_WM_STATE_ICONIC)
             minimize();
         return;
     }
 }
 
 
 /*!
   Handles configure  requests of the client window
  */
 void Client::configureRequestEvent(xcb_configure_request_event_t *e)
 {
     if (e->window != window())
         return; // ignore frame/wrapper
     if (isResize() || isMove())
         return; // we have better things to do right now
 
     if (fullscreen_mode == FullScreenNormal) { // refuse resizing of fullscreen windows
         // but allow resizing fullscreen hacks in order to let them cancel fullscreen mode
         sendSyntheticConfigureNotify();
         return;
     }
     if (isSplash()) {  // no manipulations with splashscreens either
         sendSyntheticConfigureNotify();
         return;
     }
 
     if (e->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH) {
         // first, get rid of a window border
         m_client.setBorderWidth(0);
     }
 
     if (e->value_mask & (XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_HEIGHT | XCB_CONFIG_WINDOW_WIDTH))
         configureRequest(e->value_mask, e->x, e->y, e->width, e->height, 0, false);
 
     if (e->value_mask & XCB_CONFIG_WINDOW_STACK_MODE)
         restackWindow(e->sibling, e->stack_mode, NET::FromApplication, userTime(), false);
 
     // Sending a synthetic configure notify always is fine, even in cases where
     // the ICCCM doesn't require this - it can be though of as 'the WM decided to move
     // the window later'. The client should not cause that many configure request,
     // so this should not have any significant impact. With user moving/resizing
     // the it should be optimized though (see also Client::setGeometry()/plainResize()/move()).
     sendSyntheticConfigureNotify();
 
     // SELI TODO accept configure requests for isDesktop windows (because kdesktop
     // may get XRANDR resize event before kwin), but check it's still at the bottom?
 }
 
 
 /*!
   Handles property changes of the client window
  */
 void Client::propertyNotifyEvent(xcb_property_notify_event_t *e)
 {
     Toplevel::propertyNotifyEvent(e);
     if (e->window != window())
         return; // ignore frame/wrapper
     switch(e->atom) {
     case XCB_ATOM_WM_NORMAL_HINTS:
         getWmNormalHints();
         break;
     case XCB_ATOM_WM_NAME:
         fetchName();
         break;
     case XCB_ATOM_WM_ICON_NAME:
         fetchIconicName();
         break;
     case XCB_ATOM_WM_TRANSIENT_FOR:
         readTransient();
         break;
     case XCB_ATOM_WM_HINTS:
         getIcons(); // because KWin::icon() uses WMHints as fallback
         break;
     default:
         if (e->atom == atoms->motif_wm_hints) {
             getMotifHints();
         } else if (e->atom == atoms->net_wm_sync_request_counter)
             getSyncCounter();
         else if (e->atom == atoms->activities)
             checkActivities();
         else if (e->atom == atoms->kde_first_in_window_list)
             updateFirstInTabBox();
         else if (e->atom == atoms->kde_color_sheme)
             updateColorScheme();
         else if (e->atom == atoms->kde_screen_edge_show)
             updateShowOnScreenEdge();
         else if (e->atom == atoms->gtk_frame_extents)
             detectGtkFrameExtents();
         else if (e->atom == atoms->kde_net_wm_appmenu_service_name)
             checkApplicationMenuServiceName();
         else if (e->atom == atoms->kde_net_wm_appmenu_object_path)
             checkApplicationMenuObjectPath();
         break;
     }
 }
 
 
 void Client::enterNotifyEvent(xcb_enter_notify_event_t *e)
 {
     if (e->event != frameId())
         return; // care only about entering the whole frame
 
 #define MOUSE_DRIVEN_FOCUS (!options->focusPolicyIsReasonable() || \
                             (options->focusPolicy() == Options::FocusFollowsMouse && options->isNextFocusPrefersMouse()))
     if (e->mode == XCB_NOTIFY_MODE_NORMAL || (e->mode == XCB_NOTIFY_MODE_UNGRAB && MOUSE_DRIVEN_FOCUS)) {
 
         if (options->isShadeHover()) {
             cancelShadeHoverTimer();
             if (isShade()) {
                 shadeHoverTimer = new QTimer(this);
                 connect(shadeHoverTimer, SIGNAL(timeout()), this, SLOT(shadeHover()));
                 shadeHoverTimer->setSingleShot(true);
                 shadeHoverTimer->start(options->shadeHoverInterval());
             }
         }
 #undef MOUSE_DRIVEN_FOCUS
 
         enterEvent(QPoint(e->root_x, e->root_y));
         return;
     }
 }
 
 void Client::leaveNotifyEvent(xcb_leave_notify_event_t *e)
 {
     if (e->event != frameId())
         return; // care only about leaving the whole frame
     if (e->mode == XCB_NOTIFY_MODE_NORMAL) {
         if (!isMoveResizePointerButtonDown()) {
             setMoveResizePointerMode(PositionCenter);
             updateCursor();
         }
         bool lostMouse = !rect().contains(QPoint(e->event_x, e->event_y));
         // 'lostMouse' wouldn't work with e.g. B2 or Keramik, which have non-rectangular decorations
         // (i.e. the LeaveNotify event comes before leaving the rect and no LeaveNotify event
         // comes after leaving the rect) - so lets check if the pointer is really outside the window
 
         // TODO this still sucks if a window appears above this one - it should lose the mouse
         // if this window is another client, but not if it's a popup ... maybe after KDE3.1 :(
         // (repeat after me 'AARGHL!')
         if (!lostMouse && e->detail != XCB_NOTIFY_DETAIL_INFERIOR) {
             Xcb::Pointer pointer(frameId());
             if (!pointer || !pointer->same_screen || pointer->child == XCB_WINDOW_NONE) {
                 // really lost the mouse
                 lostMouse = true;
             }
         }
         if (lostMouse) {
             leaveEvent();
             cancelShadeHoverTimer();
             if (shade_mode == ShadeHover && !isMoveResize() && !isMoveResizePointerButtonDown()) {
                 shadeHoverTimer = new QTimer(this);
                 connect(shadeHoverTimer, SIGNAL(timeout()), this, SLOT(shadeUnhover()));
                 shadeHoverTimer->setSingleShot(true);
                 shadeHoverTimer->start(options->shadeHoverInterval());
             }
             if (isDecorated()) {
                 // sending a move instead of a leave. With leave we need to send proper coords, with move it's handled internally
                 QHoverEvent leaveEvent(QEvent::HoverMove, QPointF(-1, -1), QPointF(-1, -1), Qt::NoModifier);
                 QCoreApplication::sendEvent(decoration(), &leaveEvent);
             }
         }
         if (options->focusPolicy() == Options::FocusStrictlyUnderMouse && isActive() && lostMouse) {
             workspace()->requestDelayFocus(0);
         }
         return;
     }
 }
 
 #define XCapL KKeyServer::modXLock()
 #define XNumL KKeyServer::modXNumLock()
 #define XScrL KKeyServer::modXScrollLock()
 void Client::grabButton(int modifier)
 {
     unsigned int mods[ 8 ] = {
         0, XCapL, XNumL, XNumL | XCapL,
         XScrL, XScrL | XCapL,
         XScrL | XNumL, XScrL | XNumL | XCapL
     };
     for (int i = 0;
             i < 8;
             ++i)
         m_wrapper.grabButton(XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, modifier | mods[ i ]);
 }
 
 void Client::ungrabButton(int modifier)
 {
     unsigned int mods[ 8 ] = {
         0, XCapL, XNumL, XNumL | XCapL,
         XScrL, XScrL | XCapL,
         XScrL | XNumL, XScrL | XNumL | XCapL
     };
     for (int i = 0;
             i < 8;
             ++i)
         m_wrapper.ungrabButton(modifier | mods[ i ]);
 }
 #undef XCapL
 #undef XNumL
 #undef XScrL
 
 /*
   Releases the passive grab for some modifier combinations when a
   window becomes active. This helps broken X programs that
   missinterpret LeaveNotify events in grab mode to work properly
   (Motif, AWT, Tk, ...)
  */
 void Client::updateMouseGrab()
 {
     if (workspace()->globalShortcutsDisabled()) {
         m_wrapper.ungrabButton();
         // keep grab for the simple click without modifiers if needed (see below)
         bool not_obscured = workspace()->topClientOnDesktop(VirtualDesktopManager::self()->current(), -1, true, false) == this;
         if (!(!options->isClickRaise() || not_obscured))
             grabButton(XCB_NONE);
         return;
     }
     if (isActive() && !TabBox::TabBox::self()->forcedGlobalMouseGrab()) { // see TabBox::establishTabBoxGrab()
         // first grab all modifier combinations
         m_wrapper.grabButton(XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC);
         // remove the grab for no modifiers only if the window
         // is unobscured or if the user doesn't want click raise
         // (it is unobscured if it the topmost in the unconstrained stacking order, i.e. it is
         // the most recently raised window)
         bool not_obscured = workspace()->topClientOnDesktop(VirtualDesktopManager::self()->current(), -1, true, false) == this;
         if (!options->isClickRaise() || not_obscured)
             ungrabButton(XCB_NONE);
         else
             grabButton(XCB_NONE);
         ungrabButton(XCB_MOD_MASK_SHIFT);
         ungrabButton(XCB_MOD_MASK_CONTROL);
         ungrabButton(XCB_MOD_MASK_CONTROL | XCB_MOD_MASK_SHIFT);
     } else {
         m_wrapper.ungrabButton();
         // simply grab all modifier combinations
         m_wrapper.grabButton(XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC);
     }
 }
 
 static bool modKeyDown(int state) {
     const uint keyModX = (options->keyCmdAllModKey() == Qt::Key_Meta) ?
                                                     KKeyServer::modXMeta() : KKeyServer::modXAlt();
     return keyModX  && (state & KKeyServer::accelModMaskX()) == keyModX;
 }
 
 
 // return value matters only when filtering events before decoration gets them
 bool Client::buttonPressEvent(xcb_window_t w, int button, int state, int x, int y, int x_root, int y_root, xcb_timestamp_t time)
 {
     if (isMoveResizePointerButtonDown()) {
         if (w == wrapperId())
             xcb_allow_events(connection(), XCB_ALLOW_SYNC_POINTER, XCB_TIME_CURRENT_TIME);  //xTime());
         return true;
     }
 
     if (w == wrapperId() || w == frameId() || w == inputId()) {
         // FRAME neco s tohohle by se melo zpracovat, nez to dostane dekorace
         updateUserTime(time);
         const bool bModKeyHeld = modKeyDown(state);
 
         if (isSplash()
                 && button == XCB_BUTTON_INDEX_1 && !bModKeyHeld) {
             // hide splashwindow if the user clicks on it
             hideClient(true);
             if (w == wrapperId())
                 xcb_allow_events(connection(), XCB_ALLOW_SYNC_POINTER, XCB_TIME_CURRENT_TIME);  //xTime());
             return true;
         }
 
         Options::MouseCommand com = Options::MouseNothing;
         bool was_action = false;
         if (bModKeyHeld) {
             was_action = true;
             switch(button) {
             case XCB_BUTTON_INDEX_1:
                 com = options->commandAll1();
                 break;
             case XCB_BUTTON_INDEX_2:
                 com = options->commandAll2();
                 break;
             case XCB_BUTTON_INDEX_3:
                 com = options->commandAll3();
                 break;
             case XCB_BUTTON_INDEX_4:
             case XCB_BUTTON_INDEX_5:
                 com = options->operationWindowMouseWheel(button == XCB_BUTTON_INDEX_4 ? 120 : -120);
                 break;
             }
         } else {
             if (w == wrapperId()) {
                 if (button < 4) {
                     com = getMouseCommand(x11ToQtMouseButton(button), &was_action);
                 } else if (button < 6) {
                     com = getWheelCommand(Qt::Vertical, &was_action);
                 }
             }
         }
         if (was_action) {
             bool replay = performMouseCommand(com, QPoint(x_root, y_root));
 
             if (isSpecialWindow())
                 replay = true;
 
             if (w == wrapperId())  // these can come only from a grab
                 xcb_allow_events(connection(), replay ? XCB_ALLOW_REPLAY_POINTER : XCB_ALLOW_SYNC_POINTER, XCB_TIME_CURRENT_TIME);  //xTime());
             return true;
         }
     }
 
     if (w == wrapperId()) { // these can come only from a grab
         xcb_allow_events(connection(), XCB_ALLOW_REPLAY_POINTER, XCB_TIME_CURRENT_TIME);  //xTime());
         return true;
     }
     if (w == inputId()) {
         x = x_root - geometry().x();
         y = y_root - geometry().y();
         // New API processes core events FIRST and only passes unused ones to the decoration
         QMouseEvent ev(QMouseEvent::MouseButtonPress, QPoint(x, y), QPoint(x_root, y_root),
                        x11ToQtMouseButton(button), x11ToQtMouseButtons(state), Qt::KeyboardModifiers());
         return processDecorationButtonPress(&ev, true);
     }
     if (w == frameId() && isDecorated()) {
         if (button >= 4 && button <= 7) {
             const Qt::KeyboardModifiers modifiers = x11ToQtKeyboardModifiers(state);
             // Logic borrowed from qapplication_x11.cpp
             const int delta = 120 * ((button == 4 || button == 6) ? 1 : -1);
             const bool hor = (((button == 4 || button == 5) && (modifiers & Qt::AltModifier))
                              || (button == 6 || button == 7));
 
             const QPoint angle = hor ? QPoint(delta, 0) : QPoint(0, delta);
             QWheelEvent event(QPointF(x, y),
                               QPointF(x_root, y_root),
                               QPoint(),
                               angle,
                               delta,
                               hor ? Qt::Horizontal : Qt::Vertical,
                               x11ToQtMouseButtons(state),
                               modifiers);
             event.setAccepted(false);
             QCoreApplication::sendEvent(decoration(), &event);
             if (!event.isAccepted() && !hor) {
                 if (titlebarPositionUnderMouse()) {
                     performMouseCommand(options->operationTitlebarMouseWheel(delta), QPoint(x_root, y_root));
                 }
             }
         } else {
             QMouseEvent event(QEvent::MouseButtonPress, QPointF(x, y), QPointF(x_root, y_root),
                             x11ToQtMouseButton(button), x11ToQtMouseButtons(state), x11ToQtKeyboardModifiers(state));
             event.setAccepted(false);
             QCoreApplication::sendEvent(decoration(), &event);
             if (!event.isAccepted()) {
                 processDecorationButtonPress(&event);
             }
         }
         return true;
     }
     return true;
 }
 
 // return value matters only when filtering events before decoration gets them
 bool Client::buttonReleaseEvent(xcb_window_t w, int button, int state, int x, int y, int x_root, int y_root)
 {
     if (w == frameId() && isDecorated()) {
         // wheel handled on buttonPress
         if (button < 4 || button > 7) {
             QMouseEvent event(QEvent::MouseButtonRelease,
                               QPointF(x, y),
                               QPointF(x_root, y_root),
                               x11ToQtMouseButton(button),
                               x11ToQtMouseButtons(state) & ~x11ToQtMouseButton(button),
                               x11ToQtKeyboardModifiers(state));
             event.setAccepted(false);
             QCoreApplication::sendEvent(decoration(), &event);
             if (event.isAccepted() || !titlebarPositionUnderMouse()) {
                 invalidateDecorationDoubleClickTimer(); // click was for the deco and shall not init a doubleclick
             }
         }
     }
     if (w == wrapperId()) {
         xcb_allow_events(connection(), XCB_ALLOW_SYNC_POINTER, XCB_TIME_CURRENT_TIME);  //xTime());
         return true;
     }
     if (w != frameId() && w != inputId() && w != moveResizeGrabWindow())
         return true;
     if (w == frameId() && workspace()->userActionsMenu() && workspace()->userActionsMenu()->isShown()) {
         const_cast<UserActionsMenu*>(workspace()->userActionsMenu())->grabInput();
     }
     x = this->x(); // translate from grab window to local coords
     y = this->y();
 
     // Check whether other buttons are still left pressed
     int buttonMask = XCB_BUTTON_MASK_1 | XCB_BUTTON_MASK_2 | XCB_BUTTON_MASK_3;
     if (button == XCB_BUTTON_INDEX_1)
         buttonMask &= ~XCB_BUTTON_MASK_1;
     else if (button == XCB_BUTTON_INDEX_2)
         buttonMask &= ~XCB_BUTTON_MASK_2;
     else if (button == XCB_BUTTON_INDEX_3)
         buttonMask &= ~XCB_BUTTON_MASK_3;
 
     if ((state & buttonMask) == 0) {
         endMoveResize();
     }
     return true;
 }
 
 // return value matters only when filtering events before decoration gets them
 bool Client::motionNotifyEvent(xcb_window_t w, int state, int x, int y, int x_root, int y_root)
 {
     if (w == frameId() && isDecorated() && !isMinimized()) {
         // TODO Mouse move event dependent on state
         QHoverEvent event(QEvent::HoverMove, QPointF(x, y), QPointF(x, y));
         QCoreApplication::instance()->sendEvent(decoration(), &event);
     }
     if (w != frameId() && w != inputId() && w != moveResizeGrabWindow())
         return true; // care only about the whole frame
     if (!isMoveResizePointerButtonDown()) {
         if (w == inputId()) {
             int x = x_root - geometry().x();// + padding_left;
             int y = y_root - geometry().y();// + padding_top;
 
             if (isDecorated()) {
                 QHoverEvent event(QEvent::HoverMove, QPointF(x, y), QPointF(x, y));
                 QCoreApplication::instance()->sendEvent(decoration(), &event);
             }
         }
         Position newmode = modKeyDown(state) ? PositionCenter : mousePosition();
         if (newmode != moveResizePointerMode()) {
             setMoveResizePointerMode(newmode);
             updateCursor();
         }
         return false;
     }
     if (w == moveResizeGrabWindow()) {
         x = this->x(); // translate from grab window to local coords
         y = this->y();
     }
 
     handleMoveResize(QPoint(x, y), QPoint(x_root, y_root));
     return true;
 }
 
 void Client::focusInEvent(xcb_focus_in_event_t *e)
 {
     if (e->event != window())
         return; // only window gets focus
     if (e->mode == XCB_NOTIFY_MODE_UNGRAB)
         return; // we don't care
     if (e->detail == XCB_NOTIFY_DETAIL_POINTER)
         return;  // we don't care
     if (!isShown(false) || !isOnCurrentDesktop())    // we unmapped it, but it got focus meanwhile ->
         return;            // activateNextClient() already transferred focus elsewhere
     workspace()->forEachClient([](Client *client) {
         client->cancelFocusOutTimer();
     });
     // check if this client is in should_get_focus list or if activation is allowed
     bool activate =  workspace()->allowClientActivation(this, -1U, true);
     workspace()->gotFocusIn(this);   // remove from should_get_focus list
     if (activate)
         setActive(true);
     else {
         workspace()->restoreFocus();
         demandAttention();
     }
 }
 
 void Client::focusOutEvent(xcb_focus_out_event_t *e)
 {
     if (e->event != window())
         return; // only window gets focus
     if (e->mode == XCB_NOTIFY_MODE_GRAB)
         return; // we don't care
     if (isShade())
         return; // here neither
     if (e->detail != XCB_NOTIFY_DETAIL_NONLINEAR
             && e->detail != XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL)
         // SELI check all this
         return; // hack for motif apps like netscape
     if (QApplication::activePopupWidget())
         return;
 
     // When a client loses focus, FocusOut events are usually immediatelly
     // followed by FocusIn events for another client that gains the focus
     // (unless the focus goes to another screen, or to the nofocus widget).
     // Without this check, the former focused client would have to be
     // deactivated, and after that, the new one would be activated, with
     // a short time when there would be no active client. This can cause
     // flicker sometimes, e.g. when a fullscreen is shown, and focus is transferred
     // from it to its transient, the fullscreen would be kept in the Active layer
     // at the beginning and at the end, but not in the middle, when the active
     // client would be temporarily none (see Client::belongToLayer() ).
     // Therefore the setActive(false) call is moved to the end of the current
     // event queue. If there is a matching FocusIn event in the current queue
     // this will be processed before the setActive(false) call and the activation
     // of the Client which gained FocusIn will automatically deactivate the
     // previously active client.
     if (!m_focusOutTimer) {
         m_focusOutTimer = new QTimer(this);
         m_focusOutTimer->setSingleShot(true);
         m_focusOutTimer->setInterval(0);
         connect(m_focusOutTimer, &QTimer::timeout, [this]() {
             setActive(false);
         });
     }
     m_focusOutTimer->start();
 }
 
 // performs _NET_WM_MOVERESIZE
 void Client::NETMoveResize(int x_root, int y_root, NET::Direction direction)
 {
     if (direction == NET::Move) {
         // move cursor to the provided position to prevent the window jumping there on first movement
         // the expectation is that the cursor is already at the provided position,
         // thus it's more a safety measurement
         Cursor::setPos(QPoint(x_root, y_root));
         performMouseCommand(Options::MouseMove, QPoint(x_root, y_root));
     } else if (isMoveResize() && direction == NET::MoveResizeCancel) {
         finishMoveResize(true);
         setMoveResizePointerButtonDown(false);
         updateCursor();
     } else if (direction >= NET::TopLeft && direction <= NET::Left) {
         static const Position convert[] = {
             PositionTopLeft,
             PositionTop,
             PositionTopRight,
             PositionRight,
             PositionBottomRight,
             PositionBottom,
             PositionBottomLeft,
             PositionLeft
         };
         if (!isResizable() || isShade())
             return;
         if (isMoveResize())
             finishMoveResize(false);
         setMoveResizePointerButtonDown(true);
         setMoveOffset(QPoint(x_root - x(), y_root - y()));  // map from global
         setInvertedMoveOffset(rect().bottomRight() - moveOffset());
         setUnrestrictedMoveResize(false);
         setMoveResizePointerMode(convert[ direction ]);
         if (!startMoveResize())
             setMoveResizePointerButtonDown(false);
         updateCursor();
     } else if (direction == NET::KeyboardMove) {
         // ignore mouse coordinates given in the message, mouse position is used by the moving algorithm
         Cursor::setPos(geometry().center());
         performMouseCommand(Options::MouseUnrestrictedMove, geometry().center());
     } else if (direction == NET::KeyboardSize) {
         // ignore mouse coordinates given in the message, mouse position is used by the resizing algorithm
         Cursor::setPos(geometry().bottomRight());
         performMouseCommand(Options::MouseUnrestrictedResize, geometry().bottomRight());
     }
 }
 
 void Client::keyPressEvent(uint key_code, xcb_timestamp_t time)
 {
     updateUserTime(time);
     AbstractClient::keyPressEvent(key_code);
 }
 
 void Client::syncEvent(xcb_sync_alarm_notify_event_t* e)
 {
     if (e->alarm == syncRequest.alarm && e->counter_value.hi == syncRequest.value.hi && e->counter_value.lo == syncRequest.value.lo) {
         setReadyForPainting();
         setupWindowManagementInterface();
         syncRequest.isPending = false;
         if (syncRequest.failsafeTimeout)
             syncRequest.failsafeTimeout->stop();
         if (isResize()) {
             if (syncRequest.timeout)
                 syncRequest.timeout->stop();
             performMoveResize();
         } else // setReadyForPainting does as well, but there's a small chance for resize syncs after the resize ended
             addRepaintFull();
     }
 }
 
 // ****************************************
 // Unmanaged
 // ****************************************
 
 bool Unmanaged::windowEvent(xcb_generic_event_t *e)
 {
     double old_opacity = opacity();
     NET::Properties dirtyProperties;
     NET::Properties2 dirtyProperties2;
     info->event(e, &dirtyProperties, &dirtyProperties2);   // pass through the NET stuff
     if (dirtyProperties2 & NET::WM2Opacity) {
         if (compositing()) {
             addRepaintFull();
             emit opacityChanged(this, old_opacity);
         }
     }
     if (dirtyProperties2 & NET::WM2OpaqueRegion) {
         getWmOpaqueRegion();
     }
     if (dirtyProperties2.testFlag(NET::WM2WindowRole)) {
         emit windowRoleChanged();
     }
     if (dirtyProperties2.testFlag(NET::WM2WindowClass)) {
         getResourceClass();
     }
     const uint8_t eventType = e->response_type & ~0x80;
     switch (eventType) {
     case XCB_DESTROY_NOTIFY:
         release(ReleaseReason::Destroyed);
         break;
     case XCB_UNMAP_NOTIFY:{
         workspace()->updateFocusMousePosition(Cursor::pos()); // may cause leave event
 
         // unmap notify might have been emitted due to a destroy notify
         // but unmap notify gets emitted before the destroy notify, nevertheless at this
         // point the window is already destroyed. This means any XCB request with the window
         // will cause an error.
         // To not run into these errors we try to wait for the destroy notify. For this we
         // generate a round trip to the X server and wait a very short time span before
         // handling the release.
         updateXTime();
         // using 1 msec to not just move it at the end of the event loop but add an very short
         // timespan to cover cases like unmap() followed by destroy(). The only other way to
         // ensure that the window is not destroyed when we do the release handling is to grab
         // the XServer which we do not want to do for an Unmanaged. The timespan of 1 msec is
         // short enough to not cause problems in the close window animations.
         // It's of course still possible that we miss the destroy in which case non-fatal
         // X errors are reported to the event loop and logged by Qt.
         QTimer::singleShot(1, this, SLOT(release()));
         break;
     }
     case XCB_CONFIGURE_NOTIFY:
         configureNotifyEvent(reinterpret_cast<xcb_configure_notify_event_t*>(e));
         break;
     case XCB_PROPERTY_NOTIFY:
         propertyNotifyEvent(reinterpret_cast<xcb_property_notify_event_t*>(e));
         break;
     case XCB_CLIENT_MESSAGE:
         clientMessageEvent(reinterpret_cast<xcb_client_message_event_t*>(e));
         break;
     default: {
         if (eventType == Xcb::Extensions::self()->shapeNotifyEvent()) {
             detectShape(window());
             addRepaintFull();
             addWorkspaceRepaint(geometry());  // in case shape change removes part of this window
             emit geometryShapeChanged(this, geometry());
         }
         if (eventType == Xcb::Extensions::self()->damageNotifyEvent())
             damageNotifyEvent();
         break;
     }
     }
     return false; // don't eat events, even our own unmanaged widgets are tracked
 }
 
 void Unmanaged::configureNotifyEvent(xcb_configure_notify_event_t *e)
 {
     if (effects)
         static_cast<EffectsHandlerImpl*>(effects)->checkInputWindowStacking(); // keep them on top
     QRect newgeom(e->x, e->y, e->width, e->height);
     if (newgeom != geom) {
         addWorkspaceRepaint(visibleRect());  // damage old area
         QRect old = geom;
         geom = newgeom;
         emit geometryChanged(); // update shadow region
         addRepaintFull();
         if (old.size() != geom.size())
             discardWindowPixmap();
         emit geometryShapeChanged(this, old);
     }
 }
 
 // ****************************************
 // Toplevel
 // ****************************************
 
 void Toplevel::propertyNotifyEvent(xcb_property_notify_event_t *e)
 {
     if (e->window != window())
         return; // ignore frame/wrapper
     switch(e->atom) {
     default:
         if (e->atom == atoms->wm_client_leader)
             getWmClientLeader();
         else if (e->atom == atoms->kde_net_wm_shadow)
             getShadow();
         else if (e->atom == atoms->kde_skip_close_animation)
             getSkipCloseAnimation();
         break;
     }
     emit propertyNotify(this, e->atom);
 }
 
 void Toplevel::clientMessageEvent(xcb_client_message_event_t *e)
 {
     if (e->type == atoms->wl_surface_id) {
         m_surfaceId = e->data.data32[0];
         if (auto w = waylandServer()) {
             if (auto s = KWayland::Server::SurfaceInterface::get(m_surfaceId, w->xWaylandConnection())) {
                 setSurface(s);
             }
         }
         emit surfaceIdChanged(m_surfaceId);
     }
 }
 
 } // namespace