cleanup codes of core.color

Author: sumneko

script/core/color.lua

@@ -19,21 +19,22 @@ end
 local function textToColor(colorText)
     return {
         alpha = tonumber(colorText:sub(1, 2), 16) / 255,
-        red = tonumber(colorText:sub(3, 4), 16) / 255,
+        red   = tonumber(colorText:sub(3, 4), 16) / 255,
         green = tonumber(colorText:sub(5, 6), 16) / 255,
-        blue = tonumber(colorText:sub(7, 8), 16) / 255,
+        blue  = tonumber(colorText:sub(7, 8), 16) / 255,
     }
 end
 
 
 ---@param color Color
 ---@return string
 local function colorToText(color)
-    return (''
-        .. string.format('%02x', math.tointeger(color.alpha * 255))
-        .. string.format('%02x', math.tointeger(color.red * 255))
-        .. string.format('%02x', math.tointeger(color.green * 255))
-        .. string.format('%02x', math.tointeger(color.blue * 255))):upper()
+    return string.format('%02X%02X%02X%02X'
+        , math.floor(color.alpha * 255)
+        , math.floor(color.red   * 255)
+        , math.floor(color.green * 255)
+        , math.floor(color.blue  * 255)
+    )
 end
 
 ---@class Color
@@ -48,29 +49,30 @@ end
 ---@field finish integer
 
 ---@async
-function colors(uri)
+local function colors(uri)
     local state = files.getState(uri)
     local text  = files.getText(uri)
     if not state or not text then
         return nil
     end
     ---@type ColorValue[]
-    local colors = {}
+    local colorValues = {}
 
     guide.eachSource(state.ast, function (source) ---@async
         if source.type == 'string' and isColor(source) then
             ---@type string
             local colorText = source[1]
-            
-            colors[#colors+1] = {
-                start = source.start + 1,
+
+            colorValues[#colorValues+1] = {
+                start  = source.start + 1,
                 finish = source.finish - 1,
-                color = textToColor(colorText)
+                color  = textToColor(colorText)
             }
         end
     end)
-    return colors
+    return colorValues
 end
+
 return {
     colors = colors,
     colorToText = colorToText