Added alternative RainbowBorders-low-cpu script to lower CPU

Based on code from DemiGoD
Updated and some additions to lower CPU overhead further

 On branch development
 Your branch is up to date with 'origin/development'.

 Changes to be committed:
	modified:   CHANGELOG.md
	new file:   config/hypr/UserScripts/RainbowBorders-low-cpu.sh

2 files changed, 181 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 930df65b..a1403ebb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,10 @@
 - Fixed start CLI apps from rofi like `htop`, `btop` being started with `xterm`
   - This made the apps run in light mode with tiny fonts
   - Now they are started with `kitty`
+- Added alternative `RainbowBorders-low-cpu.sh`
+  - Based on code from `DemiGoD`
+  - I added variables for finer control
+  - Some tweaks to lower CPU further
 
 ## v2.3.20
 
diff --git a/config/hypr/UserScripts/RainbowBorders-low-cpu.sh b/config/hypr/UserScripts/RainbowBorders-low-cpu.sh
new file mode 100755
index 00000000..894c4848
--- /dev/null
+++ b/config/hypr/UserScripts/RainbowBorders-low-cpu.sh
@@ -0,0 +1,177 @@
+#!/usr/bin/env bash
+# RainbowBorders-low-gpu.sh — low-overhead animated rainbow border for Hyprland
+#
+# Goal
+#   Animate Hyprland's active border with a rotating rainbow gradient while
+#   minimizing CPU usage on older systems by:
+#     - Using a modest update rate (default 1.0s) and larger angle steps
+#     - Avoiding subshell-heavy work inside the loop
+#     - Using a persistent Hyprland command socket (socat) when available
+#     - Quoting/validating inputs and suppressing noisy output
+#     - Preventing multiple concurrent instances
+#     - Optionally restoring the previous border value on exit
+#
+# Credits
+#   Initial source/idea by: DemiGoD
+#   Adaptation and optimization for low-CPU usage by: Hyprland-Dots maintainers
+#
+# Usage
+#   You can customize behavior via environment variables when launching:
+#     RB_INTERVAL    Float seconds between updates (default: 1.0)
+#     RB_STEP_DEG    Integer degrees per tick        (default: 10)
+#     RB_START_DEG   Integer starting angle          (default: 0)
+#     RB_TARGET      Hypr option to update           (default: general:col.active_border)
+#     RB_COLORS      Space-separated color list      (default: 10-color rainbow below)
+#     RB_RESTORE     If "1", attempt to restore previous value on exit (default: 1)
+#     RB_LOCKFILE    Path to a PID lock file         (default: /tmp/hypr-rainbowborders.lock)
+#     RB_TRANSPORT   auto|socat|hyprctl              (default: auto)
+#                      - socat: send each command via Hyprland's command socket
+#                        using socat (one short-lived connection per tick)
+#                      - hyprctl: spawn hyprctl each tick
+#                      - auto: prefer socat if possible, otherwise hyprctl
+#
+#   Example (slower animation):
+#     RB_INTERVAL=1.5 RB_STEP_DEG=12 ~/.config/hypr/UserScripts/RainbowBorders-low-gpu.sh &
+#
+# Notes
+#   - This focuses on the active border only. Animating inactive borders too
+#     will increase updates and CPU usage.
+#   - Higher RB_INTERVAL (e.g., 1.0–2.0s) and larger RB_STEP_DEG (10–20)
+#     reduce per-second work substantially.
+
+set -u
+
+# Defaults (can be overridden by env vars)
+RB_INTERVAL="${RB_INTERVAL:-1.0}"
+RB_STEP_DEG="${RB_STEP_DEG:-10}"
+RB_START_DEG="${RB_START_DEG:-0}"
+RB_TARGET="${RB_TARGET:-general:col.active_border}"
+RB_COLORS_DEFAULT="0xffff0000 0xffff8000 0xffffff00 0xff80ff00 0xff00ff00 0xff00ff80 0xff00ffff 0xff0080ff 0xff0000ff 0xff8000ff"
+RB_COLORS="${RB_COLORS:-$RB_COLORS_DEFAULT}"
+RB_RESTORE="${RB_RESTORE:-1}"
+RB_LOCKFILE="${RB_LOCKFILE:-/tmp/hypr-rainbowborders.lock}"
+RB_TRANSPORT="${RB_TRANSPORT:-auto}"
+
+# ---------- helpers ----------
+log() { printf '[RainbowBorders-low-gpu] %s\n' "$*" >&2; }
+
+die() { log "ERROR: $*"; exit 1; }
+
+is_float() { [[ "$1" =~ ^[0-9]+(\.[0-9]+)?$|^\.[0-9]+$ ]]; }
+
+is_int()   { [[ "$1" =~ ^[0-9]+$ ]]; }
+
+# ---------- validation ----------
+if ! is_float "$RB_INTERVAL"; then
+  log "WARN: RB_INTERVAL='$RB_INTERVAL' invalid; defaulting to 1.0"
+  RB_INTERVAL="1.0"
+fi
+if ! is_int "$RB_STEP_DEG"; then
+  log "WARN: RB_STEP_DEG='$RB_STEP_DEG' invalid; defaulting to 10"
+  RB_STEP_DEG="10"
+fi
+if ! is_int "$RB_START_DEG"; then
+  log "WARN: RB_START_DEG='$RB_START_DEG' invalid; defaulting to 0"
+  RB_START_DEG="0"
+fi
+
+# ---------- single-instance lock (PID file) ----------
+cleanup_lock() { [[ -f "$RB_LOCKFILE" ]] && rm -f "$RB_LOCKFILE"; }
+
+if [[ -f "$RB_LOCKFILE" ]]; then
+  oldpid="$(cat "$RB_LOCKFILE" 2>/dev/null || true)"
+  if [[ -n "${oldpid:-}" ]] && kill -0 "$oldpid" 2>/dev/null; then
+    log "Another instance is running (pid=$oldpid). Exiting."
+    exit 0
+  else
+    # Stale lock
+    rm -f "$RB_LOCKFILE" || true
+  fi
+fi
+printf '%d' "$$" >"$RB_LOCKFILE" 2>/dev/null || die "Cannot write lockfile $RB_LOCKFILE"
+
+# ---------- transport (socat persistent socket vs hyprctl) ----------
+RB_MODE=""
+RB_SOCK=""
+
+open_transport() {
+  local want="$RB_TRANSPORT"
+  local uid; uid=$(id -u 2>/dev/null || echo 0)
+  local base="${XDG_RUNTIME_DIR:-/run/user/$uid}"
+  local sig="${HYPRLAND_INSTANCE_SIGNATURE:-}"
+  if [[ -n "$sig" ]]; then
+    RB_SOCK="$base/hypr/$sig/.socket.sock"
+  fi
+
+  # Prefer socat if requested/allowed and socket is available
+  if [[ "$want" == "socat" || "$want" == "auto" ]]; then
+    if command -v socat >/dev/null 2>&1 && [[ -n "$RB_SOCK" && -S "$RB_SOCK" ]]; then
+      RB_MODE="socat"
+      return 0
+    elif [[ "$want" == "socat" ]]; then
+      die "RB_TRANSPORT=socat requested but 'socat' or Hyprland socket is unavailable"
+    fi
+  fi
+
+  # Fallback to hyprctl: require presence and connectivity
+  command -v hyprctl >/dev/null 2>&1 || die "hyprctl not found and socat transport unavailable"
+  if ! hyprctl monitors >/dev/null 2>&1; then
+    die "hyprctl cannot reach a running Hyprland instance"
+  fi
+  RB_MODE="hyprctl"
+  return 0
+}
+
+open_transport || exit 1
+log "Using transport: $RB_MODE"
+
+# ---------- optional restore of previous border value ----------
+PREV_VALUE=""
+if [[ "$RB_RESTORE" == "1" ]]; then
+  if command -v hyprctl >/dev/null 2>&1; then
+    # hyprctl getoption <opt> prints various formats; try common keys
+    PREV_VALUE="$(hyprctl getoption "$RB_TARGET" 2>/dev/null \
+                    | sed -n 's/^.*str:[[:space:]]\+//p; s/^.*string:[[:space:]]\+//p; s/^.*value:[[:space:]]\+//p' \
+                    | tail -n1)"
+  fi
+fi
+
+restore_previous() {
+  if [[ "$RB_RESTORE" == "1" && -n "${PREV_VALUE:-}" ]]; then
+    if [[ "$RB_MODE" == "socat" ]]; then
+      printf 'keyword %s %s\n' "$RB_TARGET" "$PREV_VALUE" | socat - "UNIX-CONNECT:$RB_SOCK" >/dev/null 2>&1 || true
+    else
+      hyprctl keyword "$RB_TARGET" "$PREV_VALUE" >/dev/null 2>&1 || true
+    fi
+  fi
+}
+
+on_exit() {
+  restore_previous
+  cleanup_lock
+}
+trap on_exit INT TERM EXIT
+
+# ---------- main loop ----------
+angle=$(( RB_START_DEG % 360 ))
+STEP=$(( RB_STEP_DEG % 360 ))
+(( STEP == 0 )) && STEP=10
+
+write_border() {
+  local a="$1"
+  if [[ "$RB_MODE" == "socat" ]]; then
+    printf 'keyword %s %s %sdeg\n' "$RB_TARGET" "$RB_COLORS" "$a" | socat - "UNIX-CONNECT:$RB_SOCK" >/dev/null 2>&1 || true
+  else
+    hyprctl keyword "$RB_TARGET" "$RB_COLORS ${a}deg" >/dev/null 2>&1 || true
+  fi
+}
+
+# Prime first write (avoid waiting one interval)
+write_border "$angle" || log "WARN: initial write failed"
+
+while :; do
+  # Advance angle and write; failures are non-fatal to keep CPU use minimal
+  angle=$(( (angle + STEP) % 360 ))
+  write_border "$angle"
+  sleep "$RB_INTERVAL"
+done