From 7039857b9542027816b188050ac1f110531f9931 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Tue, 29 Nov 2022 00:57:16 -0500
Subject: [PATCH] Make the indicator update nearly immediately from sway
 keybindings being pressed.

---
 .../waybar_recording_indicator_freebsd.bash   | 29 ++++++++++++++++---
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/ansible/roles/waybar/files/waybar_scripts/waybar_recording_indicator_freebsd.bash b/ansible/roles/waybar/files/waybar_scripts/waybar_recording_indicator_freebsd.bash
index f9ec329..8056ccb 100644
--- a/ansible/roles/waybar/files/waybar_scripts/waybar_recording_indicator_freebsd.bash
+++ b/ansible/roles/waybar/files/waybar_scripts/waybar_recording_indicator_freebsd.bash
@@ -6,11 +6,31 @@ IFS=$'\n\t'
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 SLEEP_INTERVAL=${SLEEP_INTERVAL:-10}
+DELAY_ACTION=${DELAY_ACTION:-2}
 
 function main {
     local previous_reported="-1"
+    local now=$(date +%s)
+    local check_again_at=$((now + SLEEP_INTERVAL))
+    local next_sleep_interval=$SLEEP_INTERVAL
+
+    stream_key_binding_activations | while true; do
+        if read -t "$next_sleep_interval" event; then
+            now=$(date +%s)
+            latest_allowed_check=$((now + DELAY_ACTION))
+            if [ "$latest_allowed_check" -lt "$check_again_at" ]; then
+                # Scheduling a debounced action
+                check_again_at=$latest_allowed_check
+                next_sleep_interval=$DELAY_ACTION
+            else
+                # New debounced event would trigger after a check is already scheduled
+                next_sleep_interval=$((check_again_at - now))
+            fi
+            if [ "$now" -lt "$check_again_at" ]; then
+                continue
+            fi
+        fi
 
-    stream_key_binding_activations | while read -t "$SLEEP_INTERVAL" event; do
         if pgrep -q wf-recorder; then
             local is_running=1
         else
@@ -20,14 +40,15 @@ function main {
             previous_reported="$is_running"
             report "$is_running"
         fi
-    done
 
-    while true; do
-        sleep $SLEEP_INTERVAL
+        now=$(date +%s)
+        check_again_at=$((now + SLEEP_INTERVAL))
+        next_sleep_interval=$SLEEP_INTERVAL
     done
 }
 
 function stream_key_binding_activations {
+    echo "{}"
     swaymsg --raw --monitor --type subscribe '[ "binding" ]'
 }