lua - Pandoc:Lua 过滤器，用于用 abc 替换 {{helloworld}}

Question

在 manual我找到了一个 pandoc lua 过滤器的例子:

return {
  {
    Str = function (elem)
      if elem.text == "{{helloworld}}" then
        return pandoc.Emph {pandoc.Str "Hello, World"}
      else
        return elem
      end
    end,
  }
}

我要换 {{helloworld}}与 <div>abc</div> .我的尝试:

return {
  {
    Str = function (elem)
      if elem.text == "{{helloworld}}" then
        return pandoc.RawInline('html','<div>abc</div>')
      else
        return elem
      end
    end,
  }
}

...但这给了我以下输出:

<p></p>
<div>abc</div>
<p></p>

我怎样才能摆脱空的 p -标签？

附加信息

我从 markdown 转换为 html，我的 markdown 文件如下所示:

Answer 1

manual说:

The function’s output must result in an element of the same type as the input. This means a filter function acting on an inline element must return either nil, an inline, or a list of inlines, and a function filtering a block element must return one of nil, a block, or a list of block elements. Pandoc will throw an error if this condition is violated.

您希望将输出呈现为块 ( <div>abc</div> )，但您的输入 ( Str ) 是内联的。这就是它不起作用的原因。更改 Str (内联)到 Para (座), elem.text至 element.content[1].text和 RawInline至 RawBlock它会起作用:

return {
  {
    Para = function (elem)
      if elem.content[1].text == "{{helloworld}}" then
        return pandoc.RawBlock('html','<div>abc</div>')
      else
        return elem
      end
    end,
  }
}