From 08ef849f87930ff7c17cb4421ed0416b1ef20935 Mon Sep 17 00:00:00 2001
From: David Runge <dave@sleepmap.de>
Date: Wed, 25 Mar 2015 21:09:03 +0100
Subject: bin/lid-switch-action: Rewrite of the lid-switch-action script, with
 minimal presets hardcoded (soon to be minirandr).

---
 bin/lid-switch-action | 260 ++++++++++++++++++++++++++++++++++----------------
 1 file changed, 177 insertions(+), 83 deletions(-)

(limited to 'bin')

diff --git a/bin/lid-switch-action b/bin/lid-switch-action
index e4b45a7..a2779b7 100755
--- a/bin/lid-switch-action
+++ b/bin/lid-switch-action
@@ -5,100 +5,194 @@
 # Call this script from /etc/acpi/handler.sh (or other properly set up script
 # for handling button/lid acpi event) with parameter 0 and 1 for close and open respectively
 
-export DISPLAY=:0
-export XAUTHORITY=/home/dave/.Xauthority
+set -e -u
 
-# Check whether first parameter is a number
-re='^[0-9]+$'
-if ! [[ $1 =~ $re ]]; then
-  echo "error: Not a number" >&2; exit 1
-fi
+# Find current Xsession user through loginctl list-sessions (excluding lightdm)
+# TODO: make available for desktop manager, too!
+declare x_user="$(loginctl list-sessions --no-legend| sed -e 's/\s\{2,\}/ /g;s/^[[:space:]]*//' | \
+  cut -d ' ' -f 3| grep -v "lightdm"|uniq)"
 
-# Define the log file
-log_file="/home/dave/.log/lid-switch-action.log"
-if [[ ! -w "$log_file" ]];then
-  touch "$log_file"
-  chown dave:users "$log_file"
+# Fail if there is no user set
+if [ -z "$x_user" ]; then
+  echo "error no user!"
+  exit 1
 fi
 
-echo "Calling lid-switch-action with $1" >> $log_file
+# Export Xorg DISPLAY and XAUTHORITY
+# TODO: Get number of X DISPLAY from tmp
+#declare x_display="/tmp/.X11-unix/X*"
+export DISPLAY=:0
+export XAUTHORITY=/home/$x_user/.Xauthority
 
-# Unsetting all possible connections
-HDMI1=0
-HDMI2=0
-VGA1=0
-DP1=0
-DP2=0
+# Define the log file
+declare log="/home/$x_user/.cache/$(basename $0)"
+if [[ ! -w "$log" ]]; then
+  touch "$log"
+  chown ${x_user}:${x_user} "$log"
+#  exec > "$log" 2>&1
+fi
 
-# Store $1 as it will be overwritten soon
-call=$1
+declare -a arguments=( )
+declare -a connections=( )
+declare -a active_connections=( )
+declare -a available_connections=( )
+declare -a non_primary=( "eDP1" )
+declare -a pan=( "DP2-1" "eDP1" )
+declare -a pan_vertical=( 'empty' 'empty' ) # with empty placeholders!
+declare internal="eDP1"
+declare current_primary=""
+declare action=""
 
-# while reading xrandr line by line, check its output
-connections=0
-while read line
-do
-  # if line contains connected but not disconnected, use it
-  if [[ "$line" == *connected* && "$line" != *disconnected* ]];then
-    xrandr_output[$connections]=$line
-    set -- ${xrandr_output[$connections]}
-    connected[$connections]=$1
-    (( connections++ ))
-  fi
-done < <(xrandr)
+# declare keywords (xrandr arguments)
+declare pre_output=" --output "
+declare post_auto=" --auto "
+declare post_primary=" --primary "
+declare post_pos_rightof=" --right-of"
+declare post_pos_leftof=" --left-of"
+declare post_off=" --off "
 
-# Loop all connected displays
-for i in ${connected[@]}
-do
-  case $i in
-    "HDMI1")
-      HDMI1=1
-      ;;
-    "HDMI2")
-      HDMI2=1
-      ;;
-    "VGA1")
-      VGA1=1
-      ;;
-    "DP1")
-      DP1=1
+function setup_xscreen()
+{
+  local outputs=( )
+  local connection_counter=0
+  case "$action" in
+    "open")
+      if [ ${#available_connections[@]} -gt 1 ]; then
+        for connection in ${pan[@]}
+        do
+          echo "$connection" >> $log
+          set +e
+          find_component_in "$connection" ${available_connections[@]}
+          if [ $? -eq 0 ]; then
+            echo "$connection is amongst the available outputs." >> $log
+            # adding --output argument
+            outputs=( ${outputs[@]:+${outputs[@]}} "$pre_output" )
+            # adding name of output
+            outputs=( ${outputs[@]:+${outputs[@]}} "$connection" )
+            # check whether output should not be primary in a multi output setup
+            find_component_in "$connection" ${non_primary[@]}
+            if [ $? -eq 0 ]; then
+              echo "$connection is setup for non-primary." >> $log
+            else
+              echo "$connection is NOT setup for non-primary." >> $log
+              # adding --primary argument
+              outputs=( ${outputs[@]:+${outputs[@]}} "$post_primary" )
+            fi
+            if [ $connection_counter -gt 0 ]; then
+              # adding a --right-of <connection before this one> argument
+              outputs=( ${outputs[@]:+${outputs[@]}} "$post_pos_rightof" "${pan[$((connection_counter-1))]}" )
+            fi
+            # adding --auto argument
+            outputs=( ${outputs[@]:+${outputs[@]}}"$post_auto" )
+            connection_counter=$(( $connection_counter + 1 ))
+          fi
+          set -e
+        done
+      fi
       ;;
-    "DP2")
-      DP2=1
+    "close")
+      if [ ${#available_connections[@]} -gt 1 ]; then
+        for connection in ${pan[@]}
+        do
+          echo "$connection" >> $log
+          set +e
+          find_component_in "$connection" ${available_connections[@]}
+          if [ $? -eq 0 ]; then
+            echo "$connection is amongst the available outputs." >> $log
+            # adding --output argument
+            outputs=( ${outputs[@]:+${outputs[@]}} "$pre_output" )
+            # adding name of output
+            outputs=( ${outputs[@]:+${outputs[@]}} "$connection" )
+            # if the connection is not the internal output
+            if [ $connection != $internal ]; then
+              # check whether output should not be primary in a multi output setup
+              find_component_in "$connection" ${non_primary[@]}
+              if [ $? -eq 0 ]; then
+                echo "$connection is setup for non-primary." >> $log
+              else
+                echo "$connection is NOT setup for non-primary." >> $log
+                # adding --primary argument
+                outputs=( ${outputs[@]:+${outputs[@]}} "$post_primary" )
+              fi
+              if [ $connection_counter -gt 0 ]; then
+                # adding a --right-of <connection before this one> argument
+                outputs=( ${outputs[@]:+${outputs[@]}} "$post_pos_rightof" "${pan[$((connection_counter-1))]}" )
+              fi
+              # adding --auto argument
+              outputs=( ${outputs[@]:+${outputs[@]}}"$post_auto" )
+              connection_counter=$(( $connection_counter + 1 ))
+            else
+              # adding a --off argument for the interal screen
+              outputs=( ${outputs[@]:+${outputs[@]}} "$post_off" )
+            fi
+          fi
+          set -e
+        done
+      fi
       ;;
   esac
-done
+echo "Calling: xrandr ${outputs[@]}" >> $log
+xrandr ${outputs[@]}
+}
 
-# Now checking which autorandr profile to use
-case "$call" in
-  "0")
-    if [[ $connections -gt 1 ]];then # check if more than one connection
-      if [[ $HDMI1 -gt 0 ]];then
-        echo "HDMI1 connected." >> $log_file
-        /usr/bin/autorandr -l external-plugged & >> $log_file
-      elif [[ $DP2 -gt 0 ]];then
-        echo "DP2 connected." >> $log_file
-        /usr/bin/autorandr -l external-docked & >> $log_file
-      fi
-    else # else suspend
-      echo "Only one screen connected." >> $log_file
-      if [[ -f "/home/dave/.config/awesome/i3lock" ]];then
-        echo "Using i3lock to lock screen." >> $log_file
-        su dave -c "/home/dave/.config/awesome/i3lock"
-      fi
-      echo "Suspending." >> $log_file
-      systemctl suspend
-    fi
-    ;;
-  "1")
-    if [[ $connections -gt 1 ]];then # check if more than one connection
-      if [[ $HDMI1 -gt 0 ]];then
-        echo "HDMI1 connected." >> $log_file
-        /usr/bin/autorandr -l multi-plugged & >> $log_file
-      elif [[ $DP2 -gt 0 ]];then
-        echo "DP2 connected." >> $log_file
-        /usr/bin/autorandr -l multi-docked & >> $log_file
-      fi
+function find_component_in()
+{
+  local -r component=$1
+  shift
+  local value
+  for value in "$@"
+  do
+    [[ $value == "$component" ]] && return 0
+  done
+  return 1
+}
+
+function get_current_x_information()
+{
+  # get current xrandr settings
+  current_xrandr=$(xrandr)
+  # get current primary output from xrandr
+  current_primary=$(echo "$current_xrandr" | \
+  grep -wE '(\bconnected.*primary.*[0-9]{1,5}\x[0-9]{1,5}\+[0-9]{1,5}\+[0-9]{1,5})' | \
+  cut -d ' ' -f 1)
+  echo "Current primary output: $current_primary" >> $log
+  # get all current active connections
+  active_connections=( "${active_connections[@]:+${active_connections[@]}}" $(echo "$current_xrandr" | \
+  grep -wE '(\bconnected.*[0-9]{1,5}\x[0-9]{1,5}\+[0-9]{1,5}\+[0-9]{1,5})' | cut -d ' ' -f 1) )
+  echo "Current active connections: ${active_connections[@]}" >> $log
+  # get all currently available connections
+  available_connections=( "${available_connections[@]:+${available_connections[@]}}" $(echo "$current_xrandr" | \
+  grep -wE '(\bconnected.*)' | cut -d ' ' -f 1) )
+  echo "Currently available connections: ${available_connections[@]}" >> $log
+  # get all available connections
+  connections=( "${connections[@]:+${connections[@]}}" $(echo "$current_xrandr"| grep -v 'Screen' | cut -d ' ' -f 1))
+  echo "All current connections: ${connections[@]}" >> $log
+}
+
+function get_action()
+{
+  arguments=( "${arguments[@]:+${arguments[@]}}" "${@:+$@}" )
+#  echo "${@:+$@}" >> $log
+#  echo "${arguments[@]:+${arguments[@]}}" >> $log
+  if [ ${#arguments[@]} -gt 0 ];then
+    if [ "${arguments[0]}" = "button/lid" ]; then
+      case "${arguments[2]}" in
+        "open")
+          action="open"
+          ;;
+        "close")
+          action="close"
+          ;;
+      esac
+    elif [ "${arguments[0]}" = "login" ]; then
+      action="open"
     fi
-    ;;
-esac
+  fi
+  echo "Action set: $action" >> $log
+}
+
+# pass arguments to the script to the get_action function
+get_action "${@:+$@}"
+get_current_x_information
+setup_xscreen
 
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