graesslin created this revision.
graesslin added reviewers: KWin, Plasma on Wayland.
Restricted Application added subscribers: kwin, plasma-devel.
Restricted Application added projects: Plasma on Wayland, KWin.

REVISION SUMMARY
  So far the implementation of keyboard layout handling was split between
  KeyboardInputRedirection and Xkb. KeyboardInputRedirection registered
  the global shortcut and did the handling for layout switch and config
  changes. Xkb did the notification on layout change.
  
  Layout changes can nowadays be detected through an InputEventSpy. It
  can only happen after a key change or an explicit layout switch. Thus
  it does not need to be in Xkb anymore which allows to reduce Xkb to
  only care about the Xkb keymap and state tracking.
  
  This change introduces a new class KeyboardLayout which is an
  InputEventSpy and takes over the task of the layout change notification
  from Xkb and the layout management from KeyboardInputRedirection. Thus
  everything related to management of keyboard layout is together in one
  class.
  
  This allows in future to add unit test to it (requires further cleanup
  of Xkb to be able to use it and drop the InputRedirection dependency) and
  opens the possibility to also take over keyboard layout management on X11
  for the Plasma desktop.

TEST PLAN
  Manual testing

BRANCH
  keyboard-layout

REVISION DETAIL
  https://phabricator.kde.org/D4135

AFFECTED FILES
  CMakeLists.txt
  keyboard_input.cpp
  keyboard_input.h
  keyboard_layout.cpp
  keyboard_layout.h

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: graesslin, #kwin, #plasma_on_wayland
Cc: plasma-devel, kwin, lesliezhai, ali-mohamed, hardening, jensreuterberg, 
abetts, eliasp, sebas

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