auto-theme.nvim.lua

auto-theme.nvim.lua

-- Plugin nvim to change nvchad base46 theme, when gsettings notifies color-scheme change
-- See `:h nvui.chadrc.options` and set `base46.theme` and `base46.theme_toggle` options

local function apply_theme(theme)
	local dark_theme_name = require('nvconfig').base46.theme_toggle[1]
	local current_theme_name = require('nvconfig').base46.theme
	local rq_dark = (theme == "prefer-dark")
	local is_dark = (current_theme_name == dark_theme_name)

	if rq_dark ~= is_dark then
		local ok, err = pcall(function()
			require("base46").toggle_theme()
		end)
	end
end

local function start_theme_listener()
	local handle = io.popen("gsettings get org.gnome.desktop.interface color-scheme")
	if handle then
		local result = handle:read("*a")
		handle:close()
		local initial_theme = result:match("'([^']+)'")
		if initial_theme then apply_theme(initial_theme) end
	end

	if vim.g.autotheme_job_id and vim.g.autotheme_job_id > 0 then
		vim.fn.jobstop(vim.g.autotheme_job_id)
		vim.g.autotheme_job_id = nil
	end

	vim.g.autotheme_job_id = vim.fn.jobstart({"gsettings", "monitor", "org.gnome.desktop.interface", "color-scheme"}, {
		on_stdout = function(_, data)
			if not data then return end
			for _, line in ipairs(data) do
				local theme = line:match("'([^']+)'")
				if theme then
					vim.schedule(function() apply_theme(theme) end)
				end
			end
		end,
		on_exit = function()
			vim.g.autotheme_job_id = nil
		end
	})
end

return {
	{
		"local/auto-theme",
		dir = vim.fn.stdpath("config") .. "/lua/plugins",
		dependencies = { "base46" },
		lazy = false,
		config = function()
			start_theme_listener()
		end,
	}
}