Lua filter to insert image with caption

[Thorsten Sommer <vektoren-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

[-- Attachment #1.1: Type: text/plain, Size: 1713 bytes --]

Dear community,

I worked on the PlantUML filter (cf. 
https://github.com/pandoc/lua-filters/blob/master/plantuml/plantuml.lua) to 
give the generated graphics a caption. 

It looked simple at first. All I want is to get a figure with caption, so 
in Markdown:

![This is my caption.](img.jpg)

As long as this stands alone in a paragraph, it gets transformed into a 
figure with caption. Now, I want to do the same from a Lua filter. My 
attempt was this:

local imgObj = pandoc.Image({pandoc.Str("Test caption.")}, fname)
local para = pandoc.Para({imgObj})

Thus, it generates one paragraph which contains only the generated PlantUML 
graphics. Unfortunately, it generates the image only, without the caption. 
What is wrong?

Second question: How can I pass the individual captions from markdown? 
Right now, the PlantUML filter needs a code block of the type 'plantuml', 
e.g.:

```plantuml
@startuml
A - B 
@enduml
```

I would need something like:

```plantuml[My individual caption is this...]
@startuml
A - B 
@enduml
```

Is it possible to read these additional text inside the Lua filter?


Thanks for all answers.


Best
Thorsten

-- 
You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To post to this group, send email to pandoc-discuss-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/463cce3d-8746-4ebd-b047-ddfb3ddf2467%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[-- Attachment #1.2: Type: text/html, Size: 5838 bytes --]