Lua通过换行代码传递一个值

时间:2015-08-16 20:54:52

标签: string lua match

以前,我在以下链接中收到了帮助:

Lua Line Wrapping excluding certain characters

上面的简短说明是我正在寻找一种方法来运行换行功能,同时忽略某些字符的字符数。

现在我遇到了另一个问题。我希望能够将最后一个颜色代码传送到新行。例如:

if (isset($_POST['schoolId'])) {
    echo "yes";
}else {
    echo "nope";
}//keeps echoing nope because the schoolId is not received

运行我想到的功能会导致:

If this line @Rwere over 79 characters, I would want to @Breturn the last known colour code @Yon the line break.

而不是

If this line @Rwere over 79 characters, I would want to @Breturn the last known
@Bcolour code @Yon the line break.

我希望它能够这样做,因为在很多情况下,MUD会默认回到@w颜色代码,所以它会使文本变得粗糙。

我认为最简单的方法就是反向匹配,所以我写了一个reverse_text函数:

If this line @Rwere over 79 characters, I would want to @Breturn the last known
colour code @Yon the line break.

然后转过来:

function reverse_text(str)
  local text = {}
  for word in str:gmatch("[^%s]+") do
    table.insert(text, 1, word)
  end
  return table.concat(text, " ")
end

@GThis @Yis @Ba @Mtest.

我在创建string.match时遇到的问题是颜色代码可以采用以下两种格式之一:

@%a @ x%d%d%d

此外,我不希望它返回不着色的颜色代码,表示为:

@@%a @@ x%d%d%d

在不影响我的要求的情况下,实现我的最终目标的最佳途径是什么?

1 个答案:

答案 0 :(得分:1)

function wrap(str, limit, indent, indent1)
  indent = indent or ""
  indent1 = indent1 or indent
  limit = limit or 79
  local here = 1-#indent1
  local last_color = ''
  return indent1..str:gsub("(%s+)()(%S+)()",
    function(sp, st, word, fi)
      local delta = 0
      local color_before_current_word = last_color
      word:gsub('()@([@%a])', 
        function(pos, c)
          if c == '@' then 
            delta = delta + 1 
          elseif c == 'x' then 
            delta = delta + 5
            last_color = word:sub(pos, pos+4)
          else                 
            delta = delta + 2 
            last_color = word:sub(pos, pos+1)
          end
        end)
      here = here + delta
      if fi-here > limit then
        here = st - #indent + delta
        return "\n"..indent..color_before_current_word..word
      end
    end)
end