Re: Inserting attributes into elements

[H <agents-FcZObrvlYduBUy7/sJONFg@public.gmane.org>]

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On June 13, 2023 5:00:19 PM EDT, 'William Lupton' via pandoc-discuss <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> wrote:
>As far as I know, you can't add 'style' attributes. But you can embed
>CSS
>via header-includes. You'll find an example of this if you search the
>manual for 'header-includes' (and you can use a filter to set the
>variable;
>I think Albert gave an example of how to do this a few weeks ago).
>
>On Tue, 13 Jun 2023, 21:37 H, <agents-FcZObrvlYduBUy7/sJONFg@public.gmane.org> wrote:
>
>> Continuing my quest to write a custom filter, I now ran into a need
>to add
>> attributes to different types of tags as exemplified below:
>>
>> - In header tags such as <h2>, I need to add "style=color: #112233;"
>so it
>> becomes <h2 style="color: #112233;">.
>>
>> - I analogously also need to add style information to <image> tags.
>>
>> In my filter I tried:
>>
>> style_h2 =
>>
>> if (el.level == 2) then
>>     local attr = el.attributes
>>     attr.insert = style_h2
>> end
>>
>> but ended up with the below in my html output:
>>
>> <h2
>> data-insert=" style=&quot;text-transform: uppercase; color:
>> #cc002b;&quot;">
>>
>> Clearly not the correct way. Can I add the style information as above
>in a
>> filter, in the pandoc function as I am going through my document
>> block-by-block and modifying the document structure as needed? I
>already
>> adding <div> with various style information as I iterate over the
>blocks
>> and that works fine but now I need to modify existing tags.
>>
>> I guess I could do it similarly to below but then it applies to all
>eg H2:
>>
>> function Header(el)
>>     --    remove header identifier for all levels
>>     el.identifier = ''
>>
>>     --    convert level 1 and 2 to upper case
>>     if (el.level == 1) or (el.level == 2) then
>>         return el:walk {
>>             Str = function(el)
>>                 return pandoc.Str(text.upper(el.text))
>>             end
>>         }
>>     else
>>         return el
>>     end
>> end
>>
>> How to do it on individual H2 in a filter?
>>
>> Thanks.
>>
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>> .
>>
>
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I need to stay away from css since the software the output is used in does not allow css info to be added.

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