update nvim

lua/phoenix/utils/color.lua

@@ -0,0 +1,45 @@
+local hsl_convert = require 'lush.vivid.hsl.convert'
+
+local M = {}
+
+M.hsl = function(h, s, l)
+  return hsl_convert.hsl_to_hex { h = h, s = s, l = l }
+end
+
+M.hex_to_rgb = function(hex)
+  hex = hex:gsub('#', '')
+  return {
+    r = tonumber('0x' .. hex:sub(1, 2)) / 255,
+    g = tonumber('0x' .. hex:sub(3, 4)) / 255,
+    b = tonumber('0x' .. hex:sub(5, 6)) / 255,
+  }
+end
+
+M.rgb_to_hex = function(rgb)
+  return string.format('#%02x%02x%02x', rgb.r * 255, rgb.g * 255, rgb.b * 255)
+end
+
+M.rgb_to_hsl = function(rgb)
+  local r, g, b = rgb.r, rgb.g, rgb.b
+  local max, min = math.max(r, g, b), math.min(r, g, b)
+  local h, s, l = (max + min) / 2, (max + min) / 2, (max + min) / 2
+
+  if max == min then
+    -- achromatic
+    h, s = 0, 0
+  else
+    local delta = max - min
+    s = l > 0.5 and delta / (2 - max - min) or delta / (max + min)
+    if max == r then
+      h = (g - b) / delta + (g < b and 6 or 0)
+    elseif max == g then
+      h = (b - r) / delta + 2
+    elseif max == b then
+      h = (r - g) / delta + 4
+    end
+    h = h / 6
+  end
+  return { h = h, s = s, l = l }
+end
+
+return M