Re: Fenced Div to ConTeXt Environment (was: Markdown Fenced Div to LaTeX Environment)

["'juh' via pandoc-discuss" <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>]

Thanks a lot Bastien and Denis,

I go with this one:

```lua
ENV_CLASSES = { 'intro', 'zitat', 'solution' }

local function context(s)
   return pandoc.RawBlock('context', s)
end

local function get_env_class(elem)
if elem.classes then
   for i = 1, #elem.classes do
     for j = 1, #ENV_CLASSES do
       if elem.classes[i] == ENV_CLASSES[j] then return ENV_CLASSES[j] end
   end
end
else
   error('function has_class used on an element of type ' ..
         elem.t .. ' that cannot have classes.')
end
end

function Div(el)
   local env_class = get_env_class(el) -- nil if there is none
   if env_class then -- false if env_class is nil
     return { context('\\startparagraph['.. env_class ..']'), el, 
context('\\stopparagraph') }
   end
end
```

ConTeXt is amazingly flexible in many ways and it is fun to create 
individually designed documents. But I have to deploy it to an 
organization were people want to write content in Markdown. I am 
currently working on a proof of concept that we can meet all of our 
style ideas with ConTeXt while writing in markdown using pandoc.

I think that in the long run I will need some more filters. Eg. it is 
quite easy to have a default width of images with

\setupexternalfigure[width=\textwidth]

so that the default image markup

\placefigure{My caption}{\externalfigure[image.jpg]}

works perfectly fine.

But I can imaging situations where I want to pass an argument to it like 
this.

\placefigure{My caption}{\externalfigure[image.jpg][textwidth=6em]}

I'll try to figure out how to do this in a lua filter. A co-worker of 
mine has some programming skills and might help.

But in fact there might be another solution, if I put the image in an 
special paragraph environment and redefine setupexternalfigure.

For now, thanks a lot!

juh

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