styleFromMeta
=============
Pandoc filter to apply styles found in the metadata of the document for various
objects.
Styling is supported for following types of objects:
- Standalone images
- Inline images
- Links
- Paragraphs (with restrictions, see below)
Styles are read from the metadata of the document: they may reside inside the
document or in a separate YAML file. For example
```yaml
---
img_style :
html : |
<div style="clear: both; text-align: center; margin-bottom: 16px">
<a href="$SRC$" style="margin-left: 10em;" alt="$ALT$">
<img border="0" src="$SRC$" /></a></div>
latex : |
\begin{center}
\includegraphics{$SRC$}
\end{center}
link_style :
html : |
<a href="$SRC$" style="margin-left: 1em; margin-right: 1em;">$ALT$</a>
latex : |
\href{$SRC$}{\colorbox{green}{$ALT$}}
para_style :
html : |
<span style="display: block; margin-bottom: 16px;"></span>
...
```
declares styles *img\_style*, *link\_style* and *para\_style*. Their names
(except for the last) are arbitrarily chosen and may be referred from the
document, for example
```markdown
[$link_style$ *here*](http://example.com/)
```
Placeholders `$ALT$`, `$SRC$` and `$TITLE$` from style declarations are to be
replaced by concrete data found in the object declaration. In the last example
`*here*` corresponds to `$ALT$`, and `http://example.com/` corresponds to
`$SRC$`.
As soon as paragraphs do not have place where to put extra data, style
*para\_style* is applied to all paragraphs in the document. Currently only
transformation to a span block is supported. Any contents found between opening
and closing span tags are ignored: actual paragraph contents will be inserted
inside them.