.lua

-- Highlight current matching words
vim.api.nvim_create_autocmd({"CursorMoved", "CursorMovedI", "ModeChanged"}, {
    callback = function()
        min_length_cursor_len = 3
        vim.api.nvim_set_hl(0, "CursorWord", { bg = color_table.bg_lighter2 })
        local column = vim.api.nvim_win_get_cursor(0)[2]
        local line = vim.api.nvim_get_current_line()
        local cursorword = vim.fn.matchstr(line:sub(1, column + 1), [[\k*$]])
        .. vim.fn.matchstr(line:sub(column + 1), [[^\k*]]):sub(2)

        local mode = vim.fn.mode()
        if mode ~= "n" and mode ~= "N" then
            vim.api.nvim_set_hl(0, "CursorWord", {})
            return
        end
        if cursorword == vim.w.cursorword then
            return
        end
        vim.w.cursorword = cursorword
        if vim.w.cursorword_id then
            vim.call("matchdelete", vim.w.cursorword_id)
            vim.w.cursorword_id = nil
        end
        if
            cursorword == ""
            or #cursorword > 100
            or #cursorword < min_length_cursor_len
            or string.find(cursorword, "[\192-\255]+") ~= nil
        then
            return
        end
        local pattern = [[\<]] .. cursorword .. [[\>]]
        vim.w.cursorword_id = vim.fn.matchadd("CursorWord", pattern, -1)
    end
})