Applescript：修剪空格和回车线

我编写了一个 AppleScript，它从用逗号分隔的文本文件中返回一个随机字符串：

set some_file to "Macintosh HD:Users:Zade:Library:Application Support:Notational Data:Words.txt" as alias
set the_text to read some_file as string
set the text item delimiters of AppleScript to ", "
set the_lines to (every text item of the_text)
return some item of the_lines

但我现在有一个用新行而不是逗号分隔的文本文件。每行以 0-20 个空格开头。我只想返回随机行的文本部分。我该怎么做呢？

另外，如果文本部分被普通（非卷曲）引号包围，我该如何修剪引号？

以下脚本将处理您的注释中的附加要求，并包含用于修剪字符串开头和结尾字符的语句。它排除从文件中读取的前 27 行，并将重复从列表中获取和修剪随机行，直到最终结果不为空。

set theFile to (choose file)
set theLines to paragraphs 28 thru -1 of (read theFile)

repeat -- forever

    set someLine to some item of theLines

    -- trim characters at the start
    if someLine is not "" then repeat until the first character of someLine is not in {space, tab, quote}
        if (count someLine) is 1 then
            set someLine to ""
            exit repeat
        end if
        set someLine to text 2 thru -1 of someLine
    end repeat

    -- trim characters at the end
    if someLine is not "" then repeat until the last character of someLine is not in {quote}
        if (count someLine) is 1 then
            set someLine to ""
            exit repeat
        end if
        set someLine to text 1 thru -2 of someLine
    end repeat

    if someLine is not "" then exit repeat
end repeat

return someLine