From 12d93a75c9662ce7906035fd01742879e735bc75 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <id@ypei.org>
Date: Sun, 3 Nov 2024 17:33:22 +1100
Subject: [xrandr] A script to switch to the biggest connected monitor

---
 misc/bin/switch-display.sh | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100755 misc/bin/switch-display.sh

(limited to 'misc/bin/switch-display.sh')

diff --git a/misc/bin/switch-display.sh b/misc/bin/switch-display.sh
new file mode 100755
index 0000000..4c3cba6
--- /dev/null
+++ b/misc/bin/switch-display.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+logger "$1" "$2" "$3"
+# Switch to the biggest display available. for use as an acpid hook
+
+# Make sure the variables from pipe can be assigned
+# https://stackoverflow.com/questions/42963395/bash-assign-variable-from-pipe
+shopt -s lastpipe
+
+# enable all monitors so that they show up in xrandr
+# --listactivemonitors output. somehow this output is identical to
+# that of xrandr --listmonitors
+xrandr --auto
+
+# find the widest monitor
+regex="^.*/([0-9]+)x.*/([0-9]+).* ([^ ]+)$"
+widest=0
+widest_name=""
+xrandr --listactivemonitors | while IFS=$'\n' read -r line; do
+  if [[ $line =~ $regex ]]; then
+    if (( "${BASH_REMATCH[1]}" > "$widest" )); then
+      widest="${BASH_REMATCH[1]}"
+      widest_name="${BASH_REMATCH[3]}"
+    fi
+  fi
+done
+
+# turn off all other monitors
+xrandr --listactivemonitors | while IFS=$'\n' read -r line; do
+  if [[ $line =~ $regex ]]; then
+    if [[ "${BASH_REMATCH[3]}" != "$widest_name" ]]; then
+      xrandr --output "${BASH_REMATCH[3]}" --off
+    fi
+  fi
+done
-- 
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