From fed7db4fbc527bd5613f02961fa495cdac25a7c9 Mon Sep 17 00:00:00 2001
From: kenji <kenji@hakase>
Date: Fri, 26 Dec 2025 16:09:12 -0600
Subject: [PATCH] add: screensaver

---
 modules/home/waybar.nix            |   1 +
 modules/system/hyprland.nix        |   1 +
 modules/system/scripts.nix         |   1 -
 scripts/hakase-screensaver.nix     | 143 +++++++++++++++++++++++++++++
 scripts/hakase-top-right-popup.nix |   2 +-
 5 files changed, 146 insertions(+), 2 deletions(-)
 create mode 100644 scripts/hakase-screensaver.nix

diff --git a/modules/home/waybar.nix b/modules/home/waybar.nix
index 48fb840..4c6688e 100644
--- a/modules/home/waybar.nix
+++ b/modules/home/waybar.nix
@@ -2,5 +2,6 @@
   imports = [
     ../../apps/waybar/home.nix
     ../../apps/waybar/deps.nix
+    ../../scripts/hakase-top-right-popup.nix
   ];
 }
diff --git a/modules/system/hyprland.nix b/modules/system/hyprland.nix
index 2a59ce4..043f548 100644
--- a/modules/system/hyprland.nix
+++ b/modules/system/hyprland.nix
@@ -1,5 +1,6 @@
 {
   imports = [
     ../../apps/hyprland/default.nix
+    ../../scripts/hakase-screensaver.nix
   ];
 }
diff --git a/modules/system/scripts.nix b/modules/system/scripts.nix
index 775c338..f7e9be4 100644
--- a/modules/system/scripts.nix
+++ b/modules/system/scripts.nix
@@ -1,5 +1,4 @@
 {
   imports = [
-    ../../scripts/hakase-top-right-popup.nix
   ];
 }
diff --git a/scripts/hakase-screensaver.nix b/scripts/hakase-screensaver.nix
new file mode 100644
index 0000000..3cd2f8e
--- /dev/null
+++ b/scripts/hakase-screensaver.nix
@@ -0,0 +1,143 @@
+# In home.nix or a separate module
+{
+  pkgs,
+  lib,
+  ...
+}: let
+  # Define the script package
+  hakase-cmd-screensaver = pkgs.writeShellScriptBin "hakase-cmd-screensaver" ''
+    export PATH="${lib.makeBinPath [
+      pkgs.coreutils
+      pkgs.procps # pkill, pgrep
+      pkgs.jq
+      pkgs.hyprland # hyprctl
+      pkgs.terminaltexteffects # tte
+    ]}:$PATH"
+
+    screensaver_in_focus() {
+      hyprctl activewindow -j | jq -e '.class == "org.hakase.screensaver"' >/dev/null 2>&1
+    }
+
+    exit_screensaver() {
+      hyprctl keyword cursor:invisible false
+      pkill -x tte 2>/dev/null
+      pkill -f org.hakase.screensaver 2>/dev/null
+      exit 0
+    }
+
+    trap exit_screensaver SIGINT SIGTERM SIGHUP SIGQUIT
+
+    printf '\e[?1000h\e[?1003h'
+    while read -rsn1 -t 0.1; do :; done
+
+    printf '\033]11;rgb:00/00/00\007'  # Black background
+    hyprctl keyword cursor:invisible true &>/dev/null
+
+    # Note: ''${variable} is how we escape bash variables in Nix
+    tty=$(tty 2>/dev/null)
+
+    while true; do
+      tte -i "$HOME/.config/hakase/branding/screensaver.txt" \
+        --frame-rate 120 \
+        --canvas-width 0 \
+        --canvas-height 0 \
+        --reuse-canvas \
+        --anchor-canvas c \
+        --anchor-text c \
+        --random-effect \
+        --exclude-effects dev_worm \
+        --no-eol \
+        --no-restore-cursor &
+
+      while pgrep -t "''${tty#/dev/}" -x tte >/dev/null; do
+        if read -rsn1 -t 1 || ! screensaver_in_focus; then
+          exit_screensaver
+        fi
+      done
+    done
+  '';
+  hakase-launch-screensaver = pkgs.writeShellScriptBin "hakase-launch-screensaver" ''
+    # 1. Path Setup
+    # We include necessary utils.
+    # NOTE: We assume 'hakase-cmd-screensaver', 'walker', and your terminals
+    # are already installed in your system/home profile.
+    export PATH="${lib.makeBinPath [
+      pkgs.coreutils
+      pkgs.procps # pgrep
+      pkgs.jq
+      pkgs.hyprland # hyprctl
+      pkgs.libnotify # notify-send
+      pkgs.xdg-terminal-exec
+      pkgs.terminaltexteffects # tte
+    ]}:$PATH"
+
+    if ! command -v tte &>/dev/null; then
+      exit 1
+    fi
+
+    pgrep -f org.hakase.screensaver && exit 0
+
+    if [[ -f "$HOME/.local/state/hakase/toggles/screensaver-off" ]] && [[ "$1" != "force" ]]; then
+      exit 1
+    fi
+
+    if command -v walker &>/dev/null; then
+        walker -q
+    fi
+
+    focused=$(hyprctl monitors -j | jq -r '.[] | select(.focused == true).name')
+    terminal=$(xdg-terminal-exec --print-id)
+
+    # 4. Launch loop
+    for m in $(hyprctl monitors -j | jq -r '.[] | .name'); do
+      hyprctl dispatch focusmonitor "$m"
+
+      case "$terminal" in
+      *Alacritty*)
+        hyprctl dispatch exec -- \
+          alacritty --class=org.hakase.screensaver \
+          --config-file "$HOME/.config/alacritty/screensaver.toml" \
+          -e hakase-cmd-screensaver
+        ;;
+      *ghostty*)
+        hyprctl dispatch exec -- \
+          ghostty --class=org.hakase.screensaver \
+          --config-file="$HOME/.config/ghostty/screensaver" \
+          --font-size=18 \
+          -e hakase-cmd-screensaver
+        ;;
+      *kitty*)
+        hyprctl dispatch exec -- \
+          kitty --class=org.hakase.screensaver \
+          --override font_size=18 \
+          --override window_padding_width=0 \
+          -e hakase-cmd-screensaver
+        ;;
+      *)
+        notify-send "✋  Screensaver only runs in Alacritty, Ghostty, or Kitty"
+        ;;
+      esac
+    done
+
+    # 5. Restore focus
+    hyprctl dispatch focusmonitor "$focused"
+  '';
+  hakase-toggle-screensaver = pkgs.writeShellScriptBin "hakase-toggle-screensaver" ''
+    STATE_FILE="$HOME/.local/state/omarchy/toggles/screensaver-off"
+
+    if [[ -f "$STATE_FILE" ]]; then
+      rm -f "$STATE_FILE"
+      ${pkgs.libnotify}/bin/notify-send "󱄄   Screensaver enabled"
+    else
+      mkdir -p "$(dirname "$STATE_FILE")"
+      touch "$STATE_FILE"
+      ${pkgs.libnotify}/bin/notify-send "󱄄   Screensaver disabled"
+    fi
+  '';
+in {
+  environment.systemPackages = with pkgs; [
+    hakase-launch-screensaver
+    hakase-cmd-screensaver
+    hakase-toggle-screensaver
+  ];
+}
diff --git a/scripts/hakase-top-right-popup.nix b/scripts/hakase-top-right-popup.nix
index f544db4..1bfefbd 100644
--- a/scripts/hakase-top-right-popup.nix
+++ b/scripts/hakase-top-right-popup.nix
@@ -146,7 +146,7 @@
     exec hakase-launch-popup 800 300 wiremix
   '';
 in {
-  environment.systemPackages = [
+  home.packages = [
     pkgs.jq
     pkgs.socat # Required for the socket listener
     pkgs.util-linux