add(hyprlock): added typewriter animtaion

apps/hyprlock/default.nix

@@ -6,6 +6,9 @@
   cacheWallpaper = "${config.home.homeDirectory}/.cache/current_wallpaper";
   clockFont = "JetBrains Mono";
 in {
+  imports = [
+    ./scripts/typewriter.nix
+  ];
   programs.hyprlock = {
     enable = true;
     extraConfig = ''
@@ -26,17 +29,6 @@ in {
         vibrancy = 0.2
       }
 
-      # Typewriter greeting (above clock)
-      label {
-        monitor =
-        text = Hello World!
-        color = $on_surface_variant
-        font_size = 24
-        font_family = ${clockFont} Bold
-        position = 0, 200
-        halign = center
-        valign = center
-      }
 
       # Hours (top)
       label {
@@ -111,6 +103,19 @@ in {
         fail_timeout = 2000
         fail_transition = 300
       }
+
+      # Typewriter greeting (above clock)
+      label {
+        monitor =
+        text = cmd[update:50] hakase-hyprlock-typewriter 'They do be like that, huh?'
+        color = $on_surface_variant
+        font_size = 24
+        font_family = ${clockFont} Bold
+        position = 0, 200
+        halign = center
+        valign = center
+      }
+
     '';
   };
 }

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
+  ];
 }

test/hakase-animation-typewriter.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+# flow
+# REPEATS via cmd[]. DESIGNED FOR HYPRLOCK SCRIPTING.
+# check if file exists. If not, create.
+# read the files
+# assign variables to read files
+# if letter is less than the word letters count, increment by 1, append the letter, and echo the result.
+# other than that, proceed to blinking stage.
+
+text="Gamer"
+state_file="${XDG_RUNTIME_DIR:-/tmp}/typewriter_pos"
+blink_file="${XDG_RUNTIME_DIR:-/tmp}/typewriter_blink"
+
+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}_"
+  sleep 0.2
+else
+  if ((blink % 2 == 0)); then
+    echo "${text}_"
+  else
+    echo "${text} "
+  fi
+  sleep 1.1
+fi
+
+blink=$((blink + 1))
+echo "$blink" >"$blink_file"