1 files changed, 35 insertions, 0 deletions

diff --git a/lib/theme.nix b/lib/theme.nix
new file mode 100644
index 0000000..72e43bc
--- /dev/null
+++ b/lib/theme.nix
@@ -0,0 +1,35 @@
+{ lib, ... }:
+
+with lib;
+let
+  # Convert 2 consecutive characters from a string from hexadecimal to decimal
+  hex2dec = str: start:
+    let
+      conversionTable = {
+        "0" = 0; "1" = 1; "2" = 2; "3" = 3; "4" = 4;
+        "5" = 5; "6" = 6; "7" = 7; "8" = 8; "9" = 9;
+        "a" = 10; "b" = 11; "c" = 12;
+        "d" = 13; "e" = 14; "f" = 15;
+      };
+      firstHexDigit  = toLower (elemAt (stringToCharacters str) start);
+      secondHexDigit = toLower (elemAt (stringToCharacters str) (start + 1));
+    in conversionTable.${firstHexDigit} * 16 + conversionTable.${secondHexDigit};
+
+  makeColorCode = color:
+    let genComponent = hex2dec color;
+    in "${toString (genComponent 1)};${toString (genComponent 3)};${toString (genComponent 5)}";
+
+  hex2RGB = color:
+    let genComponent = hex2dec color;
+    in {
+      red = genComponent 1;
+      green = genComponent 3;
+      blue = genComponent 5;
+    };
+
+  fgEscapeCode = hexCode: "[38;2;${makeColorCode hexCode}m";
+  bgEscapeCode = hexCode: "[48;2;${makeColorCode hexCode}m";
+in
+{
+  inherit fgEscapeCode bgEscapeCode hex2RGB;
+}