#!/bin/bash
# xorg - xorg plugin for postplug
# Copyright (c) 2004-2011 by Silvan Calarco <silvan.calarco@mambasoft.it>
# Copyright (c) 2004-2007 by Davide Madrisan <davide.madrisan@gmail.com>

if [ $UID != 0 ]; then
   echo "$0: must be superuser." >&2
   exit 1
fi

[ -r /etc/sysconfig/keyboard ] && . /etc/sysconfig/keyboard
[ -r /etc/sysconfig/postplug ] && . /etc/sysconfig/postplug

me="xorg"

. /etc/postplug/postplug.defs

XORGCONF=/etc/X11/xorg.conf

# kde-config is possibly not called for boot time speed
[ -r /opt/kde/share/config/kdm/kdmrc ] && KDMRC=/opt/kde/share/config/kdm/kdmrc || {
   [ -r /opt/kde3/share/config/kdm/kdmrc ] && KDMRC=/opt/kde3/share/config/kdm/kdmrc || \
      KDMRC="$(kde-config --prefix 2>/dev/null)/share/config/kdm/kdmrc"
}

[ -w "$KDMRC" ] ||
 { logmsg "$me" "warning: cannot find kdmrc; KDM will not be configured"
   unset KDMRC; }

#postplugnew_file=$postplugnewdir/xorg
#rm -f $postplugnew_file

[ -e /etc/X11/XF86Config -a ! -e /etc/X11/xorg.conf ] &&
   cp /etc/X11/XF86Config $XORGCONF

kernel_min=$(uname -r | sed -e 's,[^\.]*\.,,' -e 's,\..*,,')

# xorg_section_screen_config()
#    write a new xorg configuration
# args:
#    $1 : default color depth
#    $2 : file with the video modes (one per line)
function xorg_section_screen_config() {
   # fixme: this deletes from first subsection "Display" to the endsection
   sed '/SubSection "Display"/,/EndSection/s/.*//p' $XORGCONF | \
      grep -v "^\s*$" > $XORGCONF.new

   for i in `seq 1 ${#COLORDEPTHS[@]}`; do
      echo -n "\
        SubSection \"Display\"
                Modes    " >> $XORGCONF.new
      grep "${COLORDEPTHS[$i-1]} bpp" $2 | tac | \
         while read mode skip; do
            echo -n "\"${mode%,*}\" " >> $XORGCONF.new
         done
      echo "
                Depth     ${COLORDEPTHS[$i-1]}
        EndSubSection" >> $XORGCONF.new
   done
   echo "EndSection" >> $XORGCONF.new

   mv $XORGCONF $XORGCONF.save
   mv $XORGCONF.new $XORGCONF
}

# xorg_set_alternatives()
#    set alternatives and xorg configuration for specific video drivers
function xorg_set_alternatives() {

if [ "$VIDEODRIVER" = "nvidia" ]; then
   grep -q '^[^#]*\"AllowGLXWithComposite\"' $XORGCONF ||
   sed -i -e '/Driver\W*"nvidia"/a\
        Option      \"RenderAccel\" \"true\"\
        Option      \"AllowGLXWithComposite\" \"on\"\
	Option      \"NoLogo\" \"true\"' $XORGCONF

   # detect and update alternatives for nvidia driver
   nvidia-autoselect-driver
elif [ "$VIDEODRIVER" = "fglrx" -o "$VIDEODRIVER" = "avivo" ]; then
   # update alternatives for fglrx driver
   /usr/sbin/update-alternatives --auto libglx.so || true
   [ -x /usr/sbin/update-alternatives-set-fglrx ] && /usr/sbin/update-alternatives-set-fglrx
else
   # set default alternatives
   [ -x /usr/sbin/update-alternatives-set-dri ] && /usr/sbin/update-alternatives-set-dri
fi
}

# xorg_configure_loginmanager()
#    configure inittab for runlelve 5 init and kdm as loginmanager 
function xorg_configure_loginmanager() {

    # login_manager configuration
    [ ! "`grep "^x:5:" /etc/inittab`" ] && {
       cat >> /etc/inittab << _EOF

# run graphical login manager
x:5:respawn:login_manager
_EOF

   # configure kdm as the default login_manager if none is set
   /usr/sbin/alternatives --display login_manager >/dev/null ||
   /usr/sbin/alternatives --install /usr/sbin/login_manager login_manager /opt/kde3/bin/kdm 20

   telinit q
   }
}

function xorg_d_configure_keyboard() {
   # Keyboard configuration (Xorg >= 1.8 uses /etc/X11/xorg.conf.d)
   [ ! -e /etc/X11/xorg.conf.d/10-keyboard.conf -o \
     /etc/sysconfing/keyboard -nt /etc/X11/xorg.conf.d/10-keyboard.conf ] && {

      if [ ! "$XKB_MODEL" -o ! "$XKB_LAYOUT" ]; then
         case "${LANG:0:2}" in
         it)
#            XKB_MODEL="pc105"
            XKB_LAYOUT="it" ;;
         de)
#            XKB_MODEL="pc105"
            XKB_LAYOUT="de" ;;
         es)
#            XKB_MODEL="pc105"
            XKB_LAYOUT="es" ;;
         fr)
#            XKB_MODEL="pc105"
            XKB_LAYOUT="fr" ;;
         *)
#            XKB_MODEL="pc104"
            XKB_LAYOUT="us" ;;
         esac
      fi

   cat > /etc/X11/xorg.conf.d/10-keyboard.conf << __EOF
Section "InputClass"
	Identifier "Keyboard Defaults"
	MatchIsKeyboard "on"
	Driver "evdev"
	Option "XkbLayout" "$XKB_LAYOUT"
__EOF
[ "$XKB_MODEL" ] && echo "	Option \"XkbModel\" \"$XKB_MODEL\"" >>/etc/X11/xorg.conf.d/10-keyboard.conf
[ "$XKB_VARIANT" ] && echo "	Option \"XkbVariant\" \"$XKB_VARIANT\"" >>/etc/X11/xorg.conf.d/10-keyboard.conf
[ "$XKB_OPTIONS" ] && echo "	Option \"XkbOptions\" \"$XKB_OPTIONS\"" >>/etc/X11/xorg.conf.d/10-keyboard.conf
echo "EndSection" >>/etc/X11/xorg.conf.d/10-keyboard.conf

   }
}

# (re)create the '/tmp/.ICE-unix' directory with the right permissions
rm -fr /tmp/.ICE-unix
install -m 1777 -o root -g root -d /tmp/.ICE-unix

# video hardware change detection
VIDEO_DEV="`lspci -n | grep " 03[0-9][0-9]: "`"

if [ -e $XORGCONF -a -e $postpluglibdir/xorg.cache ]; then
   VIDEO_DEV_CACHED="`cat $postpluglibdir/xorg.cache`"
   [ "$VIDEO_DEV" = "$VIDEO_DEV_CACHED" ] || {
      logmsg "$me" "warning: video device appears to have changed; re-probing"
      mv $XORGCONF $XORGCONF.postplug.save
   }
fi

if [ -e $XORGCONF ]; then
   VIDEODRIVERS=(`sed -n "/Section[ \t]\"Device\"/,/EndSection/{s/^[ \t]*Driver[ \t]*\"\(.*\)\"/\1/p}" $XORGCONF`)
   # assume first driver as default videodriver
   VIDEODRIVER=${VIDEODRIVERS[0]}

   if [ "$VIDEODRIVER" = "nvidia" ]; then
      [ -e /sys/module/nouveau/parameters/modeset ] && NOUVEAU_MODESET=`cat /sys/module/nouveau/parameters/modeset`
      if [ "$NOUVEAU_MODESET" = "1" ]; then
         # replace nvidia with nouveau
         mv $XORGCONF $XORGCONF.postplug.nvidia.save
         rmmod nvidia
         echo "blacklist nvidia" > /etc/modprobe.d/postplug-nouveau.conf
      fi
   fi
fi

if [ ! -e $XORGCONF ]; then
#
# Create a new Xorg configuration file
#

   # fix set dri alternatives
   xorg_set_alternatives

   # ATI fglrx driver test workaround (Xorg -configure crashes with it)
   # Note: assuming that fglrx loads if the video card is supported
   let "ATI_DRV = 0"
   [ "`/sbin/lsmod 2>/dev/null | grep ^fglrx `" ] && let "ATI_DRV = 1"

   [ "$ATI_DRV" = "1" ] && VIDEODRIVER=ati

   # remove any nvidia driver loaded as they don't load according to PCIID
   [ "`/sbin/lsmod 2>/dev/null | grep ^nvidia `" ] && rmmod nvidia
   # detect and configure nvidia driver
   [ "$freevideo" ] || nvidia-autoselect-driver

   # sync to avoid filesystem corruption in case of system hang on probe
   sync

   HOME=/tmp Xorg :5 -configure 2>>$logfile || {
      logmsg "$me" "warning: xorg autoprobed configuration failed; enabling experimental xorg autoconfig"
      xorg_configure_loginmanager
      xorg_d_configure_keyboard
      exit 1
   }

   mv /tmp/xorg.conf.new $XORGCONF
   let "CONFCREATED = 1"

   sed -i "s|#DisplaySize|DisplaySize|" $XORGCONF
fi

DISPLAYSIZE="`sed -n "/Section[ \t]\"Monitor\"/,/EndSection/{s/[ \t]*DisplaySize[ \t]*\(.*\)/\1/p}" $XORGCONF`"
VIDEODRIVERS=(`sed -n "/Section[ \t]\"Device\"/,/EndSection/{s/^[ \t]*Driver[ \t]*\"\(.*\)\"/\1/p}" $XORGCONF`)

# assume first driver as default videodriver
VIDEODRIVER=${VIDEODRIVERS[0]}

if [ "$CONFCREATED" = "1" ]; then

   [ "`grep nomodeset /proc/cmdline`" ] && nomodeset=1

   if [ "$nomodeset" = "1" -a "$VIDEODRIVER" = "nouveau" ]; then
      sed -i "s|Driver\W*\"nouveau\"|Driver      \"nvidia\"|" $XORGCONF
      VIDEODRIVER=nvidia
      xorg_set_alternatives
      rmmod nouveau nvidia
      echo "blacklist nouveau" > /etc/modprobe.d/postplug-nouveau.conf
   fi

   if [ "$ATI_DRV" = 1 -a ! "$freevideo" ]; then

      sed -i -e '/Load\W*\"extmod\"/a\
        SubSection  "extmod"\
          Option    "omit xfree86-dga"\
        EndSubSection' $XORGCONF

      sed -i '/Load\W*\"extmod\"/d' $XORGCONF
      sed -i "s|Driver\W*\"vesa\"|Driver      \"fglrx\"|" $XORGCONF
      sed -i "s|Driver\W*\"ati\"|Driver      \"fglrx\"|" $XORGCONF
      sed -i "s|Driver\W*\"avivo\"|Driver      \"fglrx\"|" $XORGCONF
      sed -i "s|Driver\W*\"radeon\"|Driver      \"fglrx\"|" $XORGCONF
      sed -i "s|Driver\W*\"radeonhd\"|Driver      \"fglrx\"|" $XORGCONF

      VIDEODRIVER=fglrx
      xorg_set_alternatives
   fi

   # Setting video modes...

   # get DCC values detected by xorg and verify that they have reasonable ranges
   #HORIZSYNCMIN=(`grep "^#     HorizSync.*" $XORGCONF | awk '{ print $3 }'`)
   #HORIZSYNCMAX=(`grep "^#     HorizSync.*" $XORGCONF | awk '{ print $5 }'`)

   #unset reasonable
   #for currsync in `seq 0 ${#HORIZSYNCMIN[@]}`; do
    #  if [ `expr "${HORIZSYNCMIN[$currsync]}" \> 15` = 1 -a \
    #       `expr "${HORIZSYNCMIN[$currsync]}" \< 100` = 0 -a \
    #       `expr "${HORIZSYNCMAX[$currsync]}" \> 30` = 1 -a \
    #       `expr "${HORIZSYNCMAX[$currsync]}" \< 201` = 0 -a \
    #       `expr "${HORIZSYNCMAX[$currsync]}" \>= "${HORIZSYNCMIN[$currsync]}"` = 1 ]; then
    #     reasonable=$currsync
    #     break
    #  fi
   #done

   #if [ "$reasonable" ]; then
    #  sed -i -e "/Section\W*\"Monitor\"/a\
    #    HorizSync    ${HORIZSYNCMIN[$reasonable]}-${HORIZSYNCMAX[$reasonable]}" \
    #     $XORGCONF
   #else
   #if [ ! "$DISPLAYSIZE" ]; then
    #  sed -i -e '/Section\W*"Monitor"/a\
    #    DisplaySize  320 240' $XORGCONF
   #fi

   case "$VIDEODRIVER" in
      vesa|vga) sed -i -e '/Section "Screen"/a\
        #DefaultColorDepth 24' $XORGCONF ;;
      *) sed -i -e '/Section "Screen"/a\
        DefaultColorDepth 24' $XORGCONF ;;
   esac

   # Compiz/3d configuration options 
   if [ "$VIDEODRIVER" != "nvidia" ]; then
      sed -i -e '/Section "Device"/a\
        Option	"XAANoOffscreenPixmaps" "true"' $XORGCONF
   elif [ "$VIDEODRIVER" == "nvidia" ]; then
      sed -i -e '/Section "Screen"/a\
        Option	"AddARGBGLXVisuals" "true"\
	Option	"DisableGLXRootClipping" "true"' $XORGCONF
   fi

   # configure VirtualBox mouse driver
   if [ "$VIDEODRIVER" = "vboxvideo" ]; then
      sed -i "s|\"mouse\"|\"vboxmouse\"|" $XORGCONF
   fi

   # Configure fonts
   sed -i '/fonts\/Type1/d;s@\(.*X11/fonts.*\)/@\1:unscaled@' $XORGCONF
   fc-cache

   # Configure keyboard

   # NOTE:
   #   see: /etc/X11/xkb/README.config
   #        /usr/lib/X11/doc/README.XKB-Config
   #        The X Keyboard Extension: Protocol Specification
   #           <URL:http://www.x-docs.org/XKB/XKBproto.pdf>
   #        xkb configuration
   #           <URL:http://www.tsu.ru/~pascal/en/xkb>
   #
   #        /etc/X11/xkb/rules/xfree86.lst  (commonest file of rules)
   #
   # The parameters are:
   #   XkbRules   - files of rules to be used for keyboard mapping composition
   #   XkbModel   - name of model of your keyboard type
   #   XkbLayout  - layout(s) you intend to use
   #   XkbVariant - variant(s) of layout you intend to use
   #   XkbOptions - extra xkb configuration options
   #
   # XkbVariant has been left out: that means the default variant named basic is loaded.

   if [ ! "$XKB_MODEL" -o ! "$XKB_LAYOUT" ]; then
      case "${LANG:0:2}" in
      it)
         XKB_MODEL="pc105"
         XKB_LAYOUT="it" ;;
      de)
         XKB_MODEL="pc105"
         XKB_LAYOUT="de" ;;
      es)
         XKB_MODEL="pc105"
         XKB_LAYOUT="es" ;;
      fr)
         XKB_MODEL="pc105"
         XKB_LAYOUT="fr" ;;
      *)
         XKB_MODEL="pc104"
         XKB_LAYOUT="us" ;;
      esac
   fi

   if [ -n "XKbOptions" ]; then
      sed -i -e "/Identifier\W*\"Keyboard.*\"/a\\
        Option      \"XkbModel\" \"$XKB_MODEL\"\\
        Option      \"XkbLayout\" \"$XKB_LAYOUT\"\\
        Option      \"XKbOptions\" \"$XKB_OPTIONS\"" $XORGCONF
   else
      sed -i -e "/Identifier\W*\"Keyboard.*\"/a\\
        Option      \"XkbModel\" \"$XKB_MODEL\"\\
        Option      \"XkbLayout\" \"$XKB_LAYOUT\"" $XORGCONF
   fi

   # global mouse modifications to default configuration
   sed -i -e '/"CorePointer"/i \
        Option      "AllowMouseOpenFail"' $XORGCONF

#   echo "$XORGCONF" > $postplugnew_file

   xorg_set_alternatives

   # Final probe
   [ -f /var/log/Xorg.5.log ] && rm -f /var/log/Xorg.5.log

   # sync to avoid filesystem corruption in case of system hang on probe
   sync

   xinit /bin/true -- :5 2>>$logfile

   if [ -r /var/log/Xorg.5.log ]; then

      if [ "`grep '\[KMS\] Kernel modesetting enabled' /var/log/Xorg.5.log`" ]; then
         logmsg "$me" "info: "$"KMS enabled: assuming autodetect works for PANEL_SIZE and HSYNC_RANGE"
         PANEL_SIZE_DETECTED="true"
         HSYNC_RANGE_NOT_DETECTED=""
      else
         if  [ "`grep 'hsync range of 28.00-33.00 kHz' /var/log/Xorg.5.log`" -o \
               "`grep 'The EDID read for display device CRT-0 is invalid' /var/log/Xorg.5.log`" ]; then
            # no values could be autodetected by DDC, so use a failsafe low value (30-49)
            HSYNC_RANGE_NOT_DETECTED="true"
         fi

         [ "`grep 'Printing DDC gathered Modelines' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep 'EDID vendor \"' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep 'Adding EDID-provided mode' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep -i 'Panel size from' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep -i 'Panel size is' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep -i 'Panel Size ' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep 'VESA VBE DDC read successfully' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep 'LCD on internal LVDS' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep 'LCD on internal LVDS' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         [ "`grep 'LVDS.* using initial mode' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"

         # nvidia driver: CRT-. EDID not got?
         if [ "`grep 'Unable to read EDID for display device CRT-.' /var/log/Xorg.5.log`" -o \
              "`grep 'Unable to get display device CRT-..s EDID' /var/log/Xorg.5.log`" ]; then
            # nvidia driver: disable CRT-x from being used by default if DFP-0 is present
            [ "`grep 'DFP-0' /var/log/Xorg.5.log`" ] && {
               sed -i -e '/Section "Screen"/a\
              Option "ConnectedMonitor" "DFP"' $XORGCONF
            } || {
               HSYNC_RANGE_NOT_DETECTED="true"
               unset PANEL_SIZE_DETECTED
            }
         else
            # nvidia driver: we trust in nvidia-auto-select
            [ "`grep 'nvidia-auto-select' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"
         fi

         # fglrx driver
         [ "`grep 'EDID Version:' /var/log/Xorg.5.log`" ] && PANEL_SIZE_DETECTED="true"

         [ "$autoresvideo" ] && PANEL_SIZE_DETECTED="true"
      fi

      [ "$XORG_DETECT_SCREEN_SIZE" = off -o "$lowresvideo" ] && unset PANEL_SIZE_DETECTED

      [ "$HSYNC_RANGE_NOT_DETECTED" ] && {
         logmsg "$me" "\
warning: DDC hsync range cannot be detected, setting default of 30-49 kHz"
         sed -i -e '/Section\W*"Monitor"/a\
           HorizSync    30-49' $XORGCONF
      }

      [ "$PANEL_SIZE_DETECTED" ] ||
         sed -i -e '/SubSection "Display"/a\
               Modes "1024x768" "800x600" "640x480"' $XORGCONF
   else
      logmsg "$me" "warning: "$"Xorg probe failed!"
   fi
fi

####################################
#
# Xorg dynamic configuration section
#
####################################

[ -e $XORGCONF ] || {
   logmsg "$me" "error: "$"missing Xorg configuration file; aborting"
   exit 1
}

# configure inittab for login manager
xorg_configure_loginmanager

# add missing brackets to Xorg.conf device entries
sed -i "s|^[ \t]*Driver[ \t]*\([A-Za-z0-9]*\)[ \t]*$|        Driver      \"\1\"|g" $XORGCONF

# add 'Section "DRI"' if not present...
if [ "$XORG_ENABLE_DRI" = "on" ]; then
   grep -q 'Section "DRI"' $XORGCONF
   [ $? -eq 1 ] && echo "
Section \"DRI\"
        Mode 0666
EndSection" >> $XORGCONF
fi

# enable 'Composite' extensions if not present...
if [[ "$XORG_ENABLE_COMPOSITE_EXT" = "on" ]]; then
   grep -q 'Section "Extensions"' $XORGCONF
   [ $? -eq 1 ] && echo "
Section \"Extensions\"
        Option \"Composite\" \"true\"
EndSection" >> $XORGCONF
fi

# set alternative configuration for different video drivers
xorg_set_alternatives

# Configure Mice...

# remove wrong configuration for USBMouse (duplicating PS2MOUSE)
sed -i "/[\W]*InputDevice[\W]*"USBMouse".*/d" $XORGCONF

# remove obsolete input pointers configuration (since xorg-server 1.7)
sed -i "/[[:space:]]*InputDevice[[:space:]]*.*PS2Mouse.*/d; \
        /[[:space:]]*InputDevice[[:space:]]*.*Synaptics.*/d; \
        /[[:space:]]*InputDevice[[:space:]]*.*Alps.*/d" $XORGCONF

# Remove all devices set
sed -i "/\W*Option \"Device\".*/d" $XORGCONF

# Configure keyboard
xorg_d_configure_keyboard

# disable keyboard configuration for Xorg >= 1.4
sed -i "s|^\([[:space:]]*InputDevice\W*\"Keyboard0\".*\)|#\1|" $XORGCONF

# FIXME: delete empty lines
sed -i '/./,$!d' $XORGCONF

[ "$CONFCREATED" = "1" -o ! -e $postpluglibdir/xorg.cache ] && \
   echo "$VIDEO_DEV" > $postpluglibdir/xorg.cache

exit 0