BREAKING!: rewrite config api and update styles

- move config to lua
- use rose for search match
- fix background flicker when automatically switching to dawn
- remove unneeded highlights (please report regressions)
  - remove deprecated `LspDiagnostics*`
  - remove `LspReference*`
- improve overall consistency between elements
  - non-treesitter updates to match treesitter styles
  - update popup menu scrollbar and selection
  - update telescope selection
  - match cursorcolumn to cursorline

lua/rose-pine/init.lua

@@ -1,5 +1,112 @@
+local palette = require('rose-pine.palette')
+
 local M = {}
 
+---@class RosePineConfig
+---@field variant 'main'|'moon'|'dawn'
+---@field bold_vert_split boolean
+---@field dim_nc_background boolean
+---@field disable_background boolean
+---@field disable_float_background boolean
+---@field disable_italics boolean
+---@field groups RosePineGroups
+
+---@class RosePineGroups
+---@field border string
+---@field comment string
+---@field link string
+---@field punctuation string
+---@field error string
+---@field hint string
+---@field info string
+---@field warn string
+---@field git RosePineGit
+---@field headings string|RosePineHeadings
+
+---@class RosePineGit
+---@field add string
+---@field change string
+---@field delete string
+---@field dirty string
+---@field ignore string
+---@field merge string
+---@field rename string
+---@field stage string
+---@field text string
+
+---@class RosePineHeadings
+---@field h1 string
+---@field h2 string
+---@field h3 string
+---@field h4 string
+---@field h5 string
+---@field h6 string
+
+---@type RosePineConfig
+local config = {}
+
+---@param opts RosePineConfig
+function M.setup(opts)
+	vim.g.rose_pine_variant = opts.variant or 'main'
+
+	local default_config = {
+		variant = 'main',
+		bold_vert_split = false,
+		dim_nc_background = false,
+		disable_background = false,
+		disable_float_background = false,
+		disable_italics = false,
+
+		groups = {
+			border = 'highlight_med',
+			comment = 'muted',
+			link = 'iris',
+			punctuation = 'subtle',
+
+			error = 'love',
+			hint = 'iris',
+			info = 'foam',
+			warn = 'gold',
+
+			git = {
+				add = 'foam',
+				change = 'rose',
+				delete = 'love',
+				dirty = 'rose',
+				ignore = 'muted',
+				merge = 'iris',
+				rename = 'pine',
+				stage = 'iris',
+				text = 'rose',
+			},
+
+			headings = {
+				h1 = 'iris',
+				h2 = 'foam',
+				h3 = 'rose',
+				h4 = 'gold',
+				h5 = 'pine',
+				h6 = 'foam',
+			},
+		},
+	}
+
+	local groups = opts.groups or {}
+	if type(groups.headings) == 'string' then
+		groups.headings = {
+			h1 = groups.headings,
+			h2 = groups.headings,
+			h3 = groups.headings,
+			h4 = groups.headings,
+			h5 = groups.headings,
+			h6 = groups.headings,
+		}
+	end
+
+	config.user_variant = opts.variant or nil
+	config = vim.tbl_deep_extend('force', default_config, opts)
+end
+
 function M.colorscheme()
 	if vim.g.colors_name then
 		vim.cmd('hi clear')
@@ -8,20 +115,34 @@ function M.colorscheme()
 	vim.opt.termguicolors = true
 	vim.g.colors_name = 'rose-pine'
 
-	-- Match terminal theme if no variant is set
-	if vim.g.rose_pine_variant == nil and vim.o.background == 'light' then
-		vim.g.rose_pine_variant = 'dawn'
-	elseif vim.g.rose_pine_variant == 'dawn' then
+	-- match variant to vim background
+	if config.user_variant == nil and vim.o.background == 'light' then
+		config.variant = 'dawn'
+	end
+
+	-- match vim background to variant
+	if config.user_variant == 'main' or config.user_variant == 'moon' then
+		vim.o.background = 'dark'
+	elseif config.user_variant == 'dawn' then
 		vim.o.background = 'light'
 	end
 
+	---@param color string
+	local function get_palette_color(color)
+		if color and not color:find('#') then
+			return palette[config.variant][color:lower()]
+		end
+
+		return color:lower()
+	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=' .. color.fg or 'guifg=NONE'
-		local bg = color.bg and 'guibg=' .. color.bg or 'guibg=NONE'
-		local sp = color.sp and 'guisp=' .. color.sp or ''
+		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
 
@@ -31,15 +152,16 @@ function M.colorscheme()
 		end
 	end
 
-	for group, colors in pairs(require('rose-pine.theme')) do
-		highlight(group, colors)
+	local theme = require('rose-pine.theme').get(config)
+	for group, color in pairs(theme) do
+		highlight(group, color)
 	end
 
 	require('rose-pine.galaxyline.theme')
 end
 
 function M.set(variant)
-	vim.g.rose_pine_variant = variant
+	config.variant = variant
 	vim.cmd('colorscheme rose-pine')
 end
 
@@ -52,7 +174,7 @@ function M.toggle(variants)
 	end
 
 	if vim.g.rose_pine_current_variant == nil then
-		vim.g.rose_pine_current_variant = index[vim.g.rose_pine_variant] or 0
+		vim.g.rose_pine_current_variant = index[config.variant] or 0
 	end
 
 	vim.g.rose_pine_current_variant = (vim.g.rose_pine_current_variant % #variants) + 1