使用Pandoc在Reveal.js代码块中的lineNumbers-markdown转换 [英] lineNumbers in Reveal.js code block using pandoc - markdown conversion

问题描述

如何在Markdown文档中使用pandoc创建的Reveal.js幻灯片中，如何将行号显示在代码块的左侧?

How can I get the line-numbers to display on the left edge of a code block in a Reveal.js slide show created with pandoc from a markdown document?

我尝试了以下降价促销:

I have tried the following markdown:

---
title:  'Display Code-block Line Numbers'
date: 'Aug 2020'
---

--------

~~~ { .python .number-lines startFrom="1" data-line-numbers="3,4-5" }

def main():
  print( "hello pan" )

if __name__ == '__main__:
  main()

~~~

--------

使用适用于pandoc的命令:

With this command for pandoc:

pandoc -s -i -t revealjs --section-divs -o slides.html slides.md

我还尝试了 fenced_code_attributes 的各种更改: {.python .number-lines} ， {.python .numberLines} ;和 pandoc 命令:删除 -i 标志并尝试一些-variable s.

I have also tried various alterations of the fenced_code_attributes: { .python .number-lines }, { .python .numberLines }; and pandoc commands: removing the -i flag and trying some --variables.

此外，以下操作也不起作用: https://stackoverflow.com/a/55845381/5060792

Also, the following does not work either: https://stackoverflow.com/a/55845381/5060792

推荐答案

Reveal.js结合使用Highlight.js和 highlightjs-line-numbers.js v2.6，用于代码突出显示和行编号.因此，

Reveal.js uses highlight.js with highlightjs-line-numbers.js v2.6 for code highlighting and line numbering. Because of that,

• 数据行编号应该在< code> 元素中进行行编号
• 元素中的 startFrom 选项或 data-ln-start-from 属性将不起作用(当前)，因此此功能已添加到Highlightjs-line-numbers.js v2.8中.

• data-line-numbers is expected in the <code> element for line numbering
• the startFrom option or rather the data-ln-start-from attribute in the <code> element will not work (currently), hence this feature was added in highlightjs-line-numbers.js v2.8.

默认情况下，pandoc的代码块HTML输出的工作方式与Reveal.js期望的不同.例如，受防护的代码数据属性放在包装的< div> 中，reveal.js在其中找不到它们.您将需要编写原始HTML或使用过滤器更改输出，以使用Reveal.js的代码演示功能像是行编号.

By default, pandoc's HTML output for code blocks works differently than reveal.js expects it. For example, fenced code data attributes are put in a wrapping <div>, where reveal.js can't find them. You will need to write raw HTML or change the output with a filter to use reveal.js' code presentation features like line numbering.

正如@tarleb上面评论的那样，我编写了一个lua过滤器，该过滤器适应pandoc的HTML输出以支持这些功能:

As @tarleb commented above, I wrote a lua filter which adapts pandoc's HTML output to support those features: https://github.com/pandoc/lua-filters/tree/master/revealjs-codeblock.

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