xwayland: Enable xtest libei integration

Enabling this feature makes Xwayland send xtest events via
the remote desktop portal and libei.
XWayland will create a new session for each X client (it keeps
contexts around and reuses them if the cmdline matches, so not
every xdotool invocation produces a new portal prompt).

CMakeLists.txt

@@ -275,6 +275,7 @@ if (KWIN_BUILD_X11)
         PURPOSE "Needed for running kwin_wayland"
     )
     set(HAVE_XWAYLAND_LISTENFD ${Xwayland_HAVE_LISTENFD})
+    set(HAVE_XWAYLAND_ENABLE_EI_PORTAL ${Xwayland_HAVE_ENABLE_EI_PORTAL})
 
     set(HAVE_GLX ${epoxy_HAS_GLX})
     get_target_property(QT_DISABLED_FEATURES Qt6::Gui QT_DISABLED_PUBLIC_FEATURES)

cmake/modules/FindXwayland.cmake

@@ -12,6 +12,8 @@
 #     The version of Xwayland
 # ``Xwayland_HAVE_LISTENFD``
 #     True if (the requested version of) Xwayland has -listenfd option
+# ``Xwayland_HAVE_ENABLE_EI_PORTAL``
+#    True if (the requested version of) Xwayland has -enable-ei-portal option
 
 #=============================================================================
 # SPDX-FileCopyrightText: 2016 Martin Gräßlin <mgraesslin@kde.org>
@@ -25,6 +27,7 @@ pkg_check_modules(PKG_xwayland QUIET xwayland)
 
 set(Xwayland_VERSION ${PKG_xwayland_VERSION})
 pkg_get_variable(Xwayland_HAVE_LISTENFD xwayland have_listenfd)
+pkg_get_variable(Xwayland_HAVE_ENABLE_EI_PORTAL xwayland have_enable_ei_portal)
 
 find_program(Xwayland_EXECUTABLE NAMES Xwayland)
 find_package_handle_standard_args(Xwayland

src/config-kwin.h.cmake

@@ -28,5 +28,6 @@ constexpr QLatin1String KWIN_KILLER_BIN("${KWIN_KILLER_BIN}");
 constexpr QLatin1String BREEZE_KDECORATION_PLUGIN_ID("${BREEZE_KDECORATION_PLUGIN_ID}");
 #endif
 #cmakedefine01 HAVE_XWAYLAND_LISTENFD
+#cmakedefine01 HAVE_XWAYLAND_ENABLE_EI_PORTAL
 #cmakedefine01 HAVE_GLX
 #cmakedefine01 HAVE_DL_LIBRARY

src/xwayland/xwaylandlauncher.cpp

@@ -186,6 +186,9 @@ bool XwaylandLauncher::start()
     arguments << QStringLiteral("-displayfd") << QString::number(pipeFds[1]);
     arguments << QStringLiteral("-rootless");
     arguments << QStringLiteral("-wm") << QString::number(fd);
+#if HAVE_XWAYLAND_ENABLE_EI_PORTAL
+    arguments << QStringLiteral("-enable-ei-portal");
+#endif
 
     m_xwaylandProcess = new QProcess(this);
     m_xwaylandProcess->setProcessChannelMode(QProcess::ForwardedErrorChannel);