# tests whether vok is installed
test_vok() {
  return `xml sel -t -v 'count(//layoutList/layout/configItem/name[.="vok"])' /usr/share/X11/xkb/rules/evdev.xml`
}

# insert vok to the layout list
# uses a nasty trick of appending the vok layout to the end of the file
# and then moving the layout to its place
insert_vok() {
  # prepare a temp file
  TMPFILE=`mktemp`
  head -n -1 /usr/share/X11/xkb/rules/evdev.xml >> $TMPFILE
  cat /usr/share/vok/vok.xml >> $TMPFILE
  tail -n 1 /usr/share/X11/xkb/rules/evdev.xml >> $TMPFILE
  # move the vok layout to its place
  xml ed -L -m '//layout[configItem/name="vok"]' '//layoutList' $TMPFILE
  # move the temp file to evdev.xml
  cat $TMPFILE > /usr/share/X11/xkb/rules/evdev.xml
}

# removes vok from the layout list
remove_vok() {
  xml ed -L -d '//layout[configItem/name="vok"]' /usr/share/X11/xkb/rules/evdev.xml
}

post_install() {
  perl -ne '/^[[:blank:]]*vok[[:blank:]]{1,}/ && exit 1' /usr/share/X11/xkb/rules/xorg.lst && (
  sed -i "s/^! layout$/! layout\n  vok             vogo's keyboard (czech)/" /usr/share/X11/xkb/rules/evdev.lst
  sed -i "s/^! variant$/! variant\n  basic           vok: Qwerty (national chars with AltGr)\n  czech           vok: Qwerty (digits with AltGr)\n  qwertz          vok: Qwertz (national chars with AltGr)\n  czech_qwertz    vok: Qwertz (digits with AltGr)/" /usr/share/X11/xkb/rules/xorg.lst;)

  insert_vok

  echo "-- Please read http://www.abclinuxu.cz/blog/origami/2006/12/21/162644"
}

post_upgrade() {
  perl -ne '/^[[:blank:]]*vok[[:blank:]]{1,}/ && exit 1' /usr/share/X11/xkb/rules/xorg.lst && (
  sed -i "s/^! layout$/! layout\n  vok             vogo's keyboard (czech)/" /usr/share/X11/xkb/rules/xorg.lst
  sed -i "s/^! variant$/! variant\n  basic           vok: Qwerty (national chars with AltGr)\n  czech           vok: Qwerty (digits with AltGr)\n  qwertz          vok: Qwertz (national chars with AltGr)\n  czech_qwertz    vok: Qwertz (digits with AltGr)/" /usr/share/X11/xkb/rules/xorg.lst;)

  if test_vok ; then
    insert_vok
  fi

  echo "-- Please read http://www.abclinuxu.cz/blog/origami/2006/12/21/162644"
}

pre_remove() {
  sed -ni '/vok             vogo'\''s keyboard (czech)$/!p' /usr/share/X11/xkb/rules/xorg.lst
  sed -ni '/  basic           vok: Qwerty (national chars with AltGr)$/!p' /usr/share/X11/xkb/rules/xorg.lst
  sed -ni '/  czech           vok: Qwerty (digits with AltGr)/!p' /usr/share/X11/xkb/rules/xorg.lst
  sed -ni '/  qwertz          vok: Qwertz (national chars with AltGr)/!p' /usr/share/X11/xkb/rules/xorg.lst
  sed -ni '/  czech_qwertz    vok: Qwertz (digits with AltGr)/!p' /usr/share/X11/xkb/rules/xorg.lst

  remove_vok
}