Re: Converting everything that’s inside a specific div (including other div) while excluding everything else

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

Good idea -- I agree, that's probably a better approach!

Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org> writes:

> Maybe there's another way:
>
> 1. Collect all divs in the order that pandoc sees them.
> 2. In second traversal, check whether we want to keep the div. If
>    so, use the div that we stored before, as it will still contain
>    all children.
>
> Here's the code:
>
>     local divs = pandoc.List()
>     local div_index = 0
>
>     function collect (d)
>       divs:insert(d)
>     end
>
>     function filter (div)
>       div_index = div_index + 1
>       if div.classes[1] == 'show' then
>         return divs[div_index]
>       else
>         return {}
>       end
>     end
>
>     return {
>       {Div = collect},
>       {Div = filter}
>     }
>
> Butch writes:
>
>> Thanks for the response. Yeah, I’ll either do what you suggested or use
>> some external filters before passing the files through Pandoc.
>>
>>
>> On Tuesday, 29 September 2020 at 19:42:05 UTC-3 John MacFarlane wrote:
>>
>>>
>>> This is the sort of thing that is currently a bit tricky
>>> with our filter architecture.
>>>
>>> One idea might be to do several passes (i.e., several filters, which
>>> you can include in the same lua file; see the docs).
>>>
>>> In the first pass, you'd set a special attribute keep="false" on
>>> all Divs.
>>>
>>> In the second pass, you'd match Divs with the 'show' class,
>>> and use walk_block to set keep="true" on all Divs inside it.
>>> You'd also set keep="true" on it.
>>>
>>> IN the third pass, you'd match Divs and remove them if
>>> keep="false".
>>>
>>> I think something like this could work.
>>>
>>> Butch <idiosyncr...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>>>
>>> > Hello,
>>> >
>>> > I am trying to convert specific parts of an HTML file to Markdown. I
>>> want
>>> > to convert everything that’s inside a specific div (including other div)
>>> > while excluding everything else. Is that possible?
>>> >
>>> > Here is an example. I want to take this:
>>> >
>>> > <div class="show">
>>> > <p>This is the outer text.</p>
>>> > <div class="inner">
>>> > <p>This is the inner text.</p>
>>> > </div>
>>> > </div>
>>> > <div class="hide">
>>> > <p>This is the hidden text.</p>
>>> > </div>
>>> >
>>> > And convert it so I have this:
>>> >
>>> > ::: {.show}
>>> > This is the outer text.
>>> >
>>> > ::: {.inner}
>>> > This is the inner text.
>>> > :::
>>> > :::
>>> >
>>> > I.e., I want to convert everything that’s inside <div class="show">
>>> > (including other div) and to exclude everything else in the document.
>>> >
>>> > If I use a filter like this:
>>> >
>>> > function Div(el)
>>> > if el.classes[1] == "show" then
>>> > return el
>>> > else
>>> > return {}
>>> > end
>>> > end
>>> >
>>> > The resulting Markdown will be:
>>> >
>>> > ::: {.show}
>>> > This is the outer text.
>>> > :::
>>> >
>>> > Which is kind of expected. So what can I do to include in the conversion
>>> > not only <div class="show">, but also all the other div inside it?
>>> >
>>> > The actual HTML files I want to convert are very large, so I can’t list
>>> all
>>> > the classes I want to include (or exclude from) in the conversion.
>>> >
>>> > Thanks in advance.
>>> >
>>> >
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>>> .
>>>
>
>
> --
> Albert Krewinkel
> GPG: 8eed e3e2 e8c5 6f18 81fe  e836 388d c0b2 1f63 1124
>
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