Need help writing a LUA filter: merge all Para from a Div to a single Para.Str

Need help writing a LUA filter: merge all Para from a Div to a single Para.Str

[Dmitriy Krasilnikov]

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Greetings!

I'm trying to convert RST admonitions to one-liner strings.

Here's the JSON output for a «Note» admonition:
{
  "t": "Div",
  "c": [
    [
      "",
      [
        "note"
      ],
      []
    ],
    [
      {
        "t": "Div",
        "c": [
          [
            "",
            [
              "admonition-title"
            ],
            []
          ],
          [
            {
              "t": "Para",
              "c": [
                {
                  "t": "Strong",
                  "c": [
                    {
                      "t": "Str",
                      "c": "Note"
                    }
                  ]
                }
              ]
            }
          ]
        ]
      },
      {
        "t": "Para",
        "c": [
          {
            "t": "Str",
            "c": "Причина"
          },
          {
            "t": "Space"
          },
          {
            "t": "Str",
            "c": "необходимости"
          },
          {
            "t": "Space"
          },
          {
            "t": "Str",
            "c": "закрепления"
          },
          {
            "t": "Space"
          },
          {
            "t": "Str",
            "c": "понятия?"
          }
        ]
      }
    ]
  ]
}

How can I convert this top-level Div to a string like: Note: <text from the 
next Para>? I'm new to LUA, been googling all day but no hints.

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Re: Need help writing a LUA filter: merge all Para from a Div to a single Para.Str

[Albert Krewinkel]

Dmitriy Krasilnikov writes:

> Greetings!
>
> I'm trying to convert RST admonitions to one-liner strings.
>
> Here's the JSON output for a «Note» admonition:
>
> [...]
>
> How can I convert this top-level Div to a string like: Note: <text
> from the next Para>?

Here's a filter which should serve as a solid starting point. See the
docs at https://pandoc.org/lua-filters.html for explanations of what the
functions do.

    function Div (div)
      if div.classes[1] == 'note' then
        local sep = {pandoc.Str':', pandoc.Space()}
        local inlines = pandoc.utils.blocks_to_inlines(div.content, sep)
        return pandoc.Para(inlines)
      end
    end

Does that help?

Cheers,
Albert

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Re: Need help writing a LUA filter: merge all Para from a Div to a single Para.Str

[Dmitriy Krasilnikov]

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Yes, very helpful. Now I see there's a special function to convert block to 
inlines, missed it somehow.

For future reference of newbies like myself, here's what I've done to 
replace "Note" to something else before squashing Div's to one Para:

function Div (div)
    if div.classes[1] == 'note' then





*        div = pandoc.walk_block(div, {                Para = 
function(element)                    if element.content[1].text == "Note" 
then                        return pandoc.Para { pandoc.Emph(pandoc.Str 
'Примечание') }                    end                end })*
        local sep = {pandoc.Str':', pandoc.Space() }
        local inlines = pandoc.utils.blocks_to_inlines(div.content, sep)
        return pandoc.Para(inlines) -- pandoc.Str('') to drop the notes 
completely
    end
end



суббота, 10 августа 2019 г., 19:46:51 UTC+3 пользователь Albert Krewinkel 
написал:
>
>
> Dmitriy Krasilnikov writes: 
>
> > Greetings! 
> > 
> > I'm trying to convert RST admonitions to one-liner strings. 
> > 
> > Here's the JSON output for a «Note» admonition: 
> > 
> > [...] 
> > 
> > How can I convert this top-level Div to a string like: Note: <text 
> > from the next Para>? 
>
> Here's a filter which should serve as a solid starting point. See the 
> docs at https://pandoc.org/lua-filters.html for explanations of what the 
> functions do. 
>
>     function Div (div) 
>       if div.classes[1] == 'note' then 
>         local sep = {pandoc.Str':', pandoc.Space()} 
>         local inlines = pandoc.utils.blocks_to_inlines(div.content, sep) 
>         return pandoc.Para(inlines) 
>       end 
>     end 
>
> Does that help? 
>
> Cheers, 
> Albert 
>

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