theme redux

src/utils/ansi-to-rgba.ts

@@ -0,0 +1,41 @@
+import { RGBA } from "@opentui/core"
+
+export function ansiToRgba(code: number) {
+  if (code < 16) {
+    const ansi = [
+      "#000000",
+      "#800000",
+      "#008000",
+      "#808000",
+      "#000080",
+      "#800080",
+      "#008080",
+      "#c0c0c0",
+      "#808080",
+      "#ff0000",
+      "#00ff00",
+      "#ffff00",
+      "#0000ff",
+      "#ff00ff",
+      "#00ffff",
+      "#ffffff",
+    ]
+    return RGBA.fromHex(ansi[code] ?? "#000000")
+  }
+
+  if (code < 232) {
+    const index = code - 16
+    const b = index % 6
+    const g = Math.floor(index / 6) % 6
+    const r = Math.floor(index / 36)
+    const value = (x: number) => (x === 0 ? 0 : x * 40 + 55)
+    return RGBA.fromInts(value(r), value(g), value(b))
+  }
+
+  if (code < 256) {
+    const gray = (code - 232) * 10 + 8
+    return RGBA.fromInts(gray, gray, gray)
+  }
+
+  return RGBA.fromInts(0, 0, 0)
+}