fix named blend styles

ref #70

lua/rose-pine/init.lua

@@ -1,3 +1,5 @@
+local util = require('rose-pine.util')
+
 local M = {}
 local show_init_messages = true
 
@@ -165,37 +167,9 @@ function M.colorscheme()
 		show_init_messages = false
 	end
 
-	---@param color string
-	local function get_palette_color(color)
-		color = color:lower()
-		local p = require('rose-pine.palette')
-
-		if color and not color:find('#') and color ~= 'none' then
-			return p[color]
-		end
-
-		return color
-	end
-
-	---@param group string
-	---@param color table<string, string>
-	local function highlight(group, color)
-		local style = color.style and 'gui=' .. color.style or 'gui=NONE'
-		local fg = color.fg and 'guifg=' .. get_palette_color(color.fg) or 'guifg=NONE'
-		local bg = color.bg and 'guibg=' .. get_palette_color(color.bg) or 'guibg=NONE'
-		local sp = color.sp and 'guisp=' .. get_palette_color(color.sp) or ''
-
-		local hl = 'highlight ' .. group .. ' ' .. style .. ' ' .. fg .. ' ' .. bg .. ' ' .. sp
-
-		vim.cmd(hl)
-		if color.link then
-			vim.cmd('highlight! link ' .. group .. ' ' .. color.link)
-		end
-	end
-
 	local theme = require('rose-pine.theme').get(config)
 	for group, color in pairs(theme) do
-		highlight(group, color)
+		util.highlight(group, color)
 	end
 
 	require('rose-pine.galaxyline.theme')

lua/rose-pine/util.lua

@@ -1,25 +1,39 @@
 local util = {}
 
-local function get_byte(value, offset)
+local function byte(value, offset)
 	return bit.band(bit.rshift(value, offset), 0xFF)
 end
 
-local function get_color(color)
+local function rgb(color)
 	color = vim.api.nvim_get_color_by_name(color)
 
 	if color == -1 then
 		color = vim.opt.background:get() == 'dark' and 000 or 255255255
 	end
 
-	return { get_byte(color, 16), get_byte(color, 8), get_byte(color, 0) }
+	return { byte(color, 16), byte(color, 8), byte(color, 0) }
+end
+
+local function parse_color(color)
+	if color == nil then
+		return print('invalid color')
+	end
+
+	color = color:lower()
+
+	if not color:find('#') and color ~= 'none' then
+		color = require('rose-pine.palette')[color] or vim.api.nvim_get_color_by_name(color)
+	end
+
+	return color
 end
 
 ---@param fg string foreground color
 ---@param bg string background color
 ---@param alpha number number between 0 (background) and 1 (foreground)
-function util.blend(fg, bg, alpha)
-	bg = get_color(bg)
-	fg = get_color(fg)
+util.blend = function(fg, bg, alpha)
+	fg = rgb(parse_color(fg))
+	bg = rgb(parse_color(bg))
 
 	local function blend_channel(i)
 		local ret = (alpha * fg[i] + ((1 - alpha) * bg[i]))
@@ -29,4 +43,20 @@ function util.blend(fg, bg, alpha)
 	return string.format('#%02X%02X%02X', blend_channel(1), blend_channel(2), blend_channel(3))
 end
 
+---@param group string
+---@param color table<string, string>
+util.highlight = function(group, color)
+	local style = color.style and 'gui=' .. color.style or 'gui=NONE'
+	local fg = color.fg and 'guifg=' .. parse_color(color.fg) or 'guifg=NONE'
+	local bg = color.bg and 'guibg=' .. parse_color(color.bg) or 'guibg=NONE'
+	local sp = color.sp and 'guisp=' .. parse_color(color.sp) or ''
+
+	vim.cmd(string.format('highlight %s %s %s %s %s', group, style, fg, bg, sp))
+
+	if color.link then
+		vim.cmd(string.format('highlight! link %s %s', group, color.link))
+		-- vim.cmd('highlight! link ' .. group .. ' ' .. color.link)
+	end
+end
+
 return util