implement xrandr script framework

_sync.sh

@@ -12,6 +12,7 @@ dirs=(
   "/var/unbound:."
   "$HOME/bhyve:."
   "$HOME/ansible:."
+  "$HOME/xrandr:."
   "$HOME/.config/i3:i3wm"
   "$HOME/.config/i3status:i3wm"
 )

xrandr/README.md

@@ -0,0 +1,23 @@
+# xrandr
+
+framework of bash scripts to implement KDE's display configurator.
+
+## config
+
+```config.sh``` - set here your primary output and default resoluton
+
+## commands
+
+```default.sh``` - turn off external outputs and revert back to default resolution
+
+```extend-right.sh``` - create "right" monitor with its maximum resolution available
+
+```unify.sh``` - set both primary and external (secondary) outputs to same resolution, and output contents from primary to secondary (xrandr's --same-as option)
+
+## utils
+
+```vga-or-hdmi.sh``` - will output VGA or HDMI output that is available.
+
+```max-res.sh``` - determine biggest resolution available given by output name
+
+```same-res.sh``` - find equal resolution of two outputs

xrandr/config.sh

@@ -0,0 +1,2 @@
+export primary="LVDS-1"
+export defalt_res="1366x768"

xrandr/default.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+source config.sh
+
+xrandr --output VGA-1 --off
+xrandr --output HDMI-1 --off
+xrandr --output DP-1 --off
+
+xrandr --output $primary --mode $defalt_res

xrandr/enum-res.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+device="$1"
+output=$(xrandr)
+
+begin=$(echo "$output" | awk '$1=="'$device'" { print NR }')
+end=$(echo "$output" | awk 'NR>'$begin' { if ($1 ~ /\d*x\d*/) {} else { print NR; exit } }')
+
+echo "$output" | awk "NR > $begin && NR < $end"

xrandr/extend-right.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+source config.sh
+secondary=$(./vga-or-hdmi.sh)
+if [ $? -ne 0 ]; then
+    >&2 echo "no VGA or HDMI output is present!"
+    exit 1
+fi
+
+secondary_res=$(./max-res.sh "$secondary")
+if [ -z "$secondary_res" ]; then
+    >&2 echo "max res for secondary $secondary not found!"
+    exit 1
+fi
+
+xrandr --output $primary --output $secondary --mode $secondary_res --right-of $primary

xrandr/max-res.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+device="$1"
+
+max_res=""
+max_area=0
+
+while read res x y; do
+  area=$(( $x*$y ))
+  if [ $area -ge $max_area ]; then
+    max_area=$area
+    max_res="$res"
+  fi
+done< <(./enum-res.sh "$device" | gawk 'match ($1, /([0-9]*)x([0-9]*)/, res) {print $1, res[1], res[2]}')
+
+echo $max_res

xrandr/same-res.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+device1="$1"
+device2="$2"
+
+while read res1 x1 y1; do
+  area1=$(( $x1*$y1 ))
+    while read res2 x2 y2; do
+    area2=$(( $x2*$y2 ))
+        if [ $area1 -eq $area2 ]; then
+            echo $res2
+            exit
+        fi
+    done< <(./enum-res.sh "$device2" | gawk 'match ($1, /([0-9]*)x([0-9]*)/, res) {print $1, res[1], res[2]}')
+done< <(./enum-res.sh "$device1" | gawk 'match ($1, /([0-9]*)x([0-9]*)/, res) {print $1, res[1], res[2]}')
+
+exit 1

xrandr/unify.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+source config.sh
+
+secondary=$(./vga-or-hdmi.sh)
+if [ -z "$secondary" ]; then
+    >&2 echo "no VGA or HDMI output is present!"
+fi
+
+same_res=$(./same-res.sh "$primary" "$secondary")
+if [ $? -ne 0 ]; then
+    >&2 echo "equal resolution for $primary and $secondary was not found"
+    exit 1
+fi
+
+xrandr --output $primary --mode $same_res --primary --output $secondary --mode $same_res --same-as $primary

xrandr/vga-or-hdmi.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+output=$(xrandr | awk '$2=="connected" { if ($1 ~ /VGA|HDMI/) { print $1 } }')
+if [ -z "$output" ]; then
+  exit 1;
+else
+  echo $output
+fi