It is neither possible nor needed to convert the whole block to HTML within the filter; rather you should just inject the start and end tags:
``````lua
-- Create these only once, for speed and resources saving!
local pre = pandoc.RawBlock('html', '<note>')
local post = pandoc.RawBlock('html', '</note>')
function Div (div)
-- The order of the classes shouldn't matter!
if div.classes:includes('replace-me') then
local content = div.content
table.insert(content, 1, pre)
table.insert(content, post)
return content
end
return nil
end
``````
Hello,
I would like to ask how you should, in general, detect and manipulate with Pandoc `block` elements. Currently, I am trying to replace `<div class='replace-me'>` tag with `<note>` tag in similar (highly simplified) HTML file:
```.{html}
<html>
<body>
<p> First line. </p>
<div class="replace-me another-class"> This should carry on to converted document. </div>
<p>End.</p>
</body>
</html>
```
I have tried to detect the `<div>` tag, use `walk_block` to get the `<div>` content and put it in `<note>` tag, I also found a code using `:walk` method. Lastly, I tried to convert `<div>` content to simple string and concatenate that in `RawInline` type:
```.{lua}
if elem.t == 'Div' and elem.classes[1] == "replace-me" then
content = pandoc.utils.stringify(elem.content)
return pandoc.RawInline('html', '<note>' .. content.. '</note>')
else
return elem
end
```
But none of that is working. I would like to ask you, how to work in general with `pandoc_walk` or `:walk` (are they the same?) and how to deal with my specific situation?
Thank you very much for any help, I ope that afterwards I will be able to help myself a little bit more :)
Regards Tomas
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