add(hyprlock): added typewriter animtaion

apps/hyprlock/scripts/random-text.nix

@@ -0,0 +1,8 @@
+{pkgs, ...}: let
+  hakase-hyprlock-text-generator = pkgs.writeShellScriptBin "hakase-hyprlock-text-generator" ''
+
+  '';
+in {
+  home.packages = [
+  ];
+}

apps/hyprlock/scripts/typewriter.nix

@@ -1,3 +1,60 @@
 {pkgs, ...}: let
+  hakase-hyprlock-typewriter = pkgs.writeShellScriptBin "hakase-hyprlock-typewriter" ''
+    text="$1"
+    if [[ -z "$text" ]]; then
+      echo "Usage: $(basename "$0") [text]"
+      exit 1
+    fi
+    state_file="''${XDG_RUNTIME_DIR:-/tmp}/typewriter_pos"
+    blink_file="''${XDG_RUNTIME_DIR:-/tmp}/typewriter_blink"
+    pid_file="''${XDG_RUNTIME_DIR:-/tmp}/typewriter_pid"
+
+    current_pid=$(pgrep -x hyprlock | head -1)
+
+    if [[ -f $pid_file ]]; then
+      old_pid=$(cat $pid_file)
+      if [[ "''${old_pid}" != "''${current_pid}"  ]]; then
+        rm -f "$state_file" "$blink_file"
+      fi
+    fi
+    echo "$current_pid" >"$pid_file"
+
+    if [[ ! -f $state_file ]]; then
+      echo 0 >"$state_file"
+    fi
+
+    if [[ ! -f $blink_file ]]; then
+      echo 0 >"$blink_file"
+    fi
+
+    len=''${#text}
+    letter=$(cat "$state_file")
+    blink=$(cat "$blink_file")
+
+    if [[ $letter -lt $len ]]; then
+      letter=$((letter + 1))
+      echo "$letter" >"$state_file"
+      echo "''${text:0:$letter}_"
+    else
+      # Toggle every 4 calls (at 200ms update = ~800ms blink)
+      if (((blink / 20) % 2 == 0)); then
+        echo "''${text}_"
+      else
+        echo "''${text}<span alpha=\"1%\">_</span>"
+      fi
+    fi
+
+    blink=$((blink + 1))
+    echo "$blink" >"$blink_file"
+  '';
+  hakase-test-hyprlock-typewriter = pkgs.writeShellScriptBin "hakase-test-hyprlock-typewriter" ''
+    for i in {1..10}; do
+      hakase-hyprlock-typewriter
+    done
+  '';
 in {
+  home.packages = [
+    hakase-hyprlock-typewriter
+    hakase-test-hyprlock-typewriter
+  ];
 }