Improves syntax highlight filter#325
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The class of pre element was a legacy behavior. The Rouge formatter (ouge::Formatters::HTMLLegacy) used to wrap the highlight inside a `div`. The current formatter (`Rouge::Formatters::HTML`) we’re using does not do this any more. Also confirm with the code blocks behavior from Commonmark spec[1] and GitHub flavored spec[2] do not add class attribute to pre element. Hence the node here does not have class to set here. [1] https://spec.commonmark.org/0.29/#fenced-code-blocks [2] https://github.github.com/gfm/#fenced-code-blocks
If we generate a theme from Rouge: `Rouge::Themes::MonokaiSublime.render`, by default it scope
under .highlight:
```
.highlight table td { padding: 5px; }
...
.highlight .o { color: #f92672; }"
```
So we need to add highlight class to pre element.
If a user would like to scope under .code, then the context also needs change the generated highlight class for lang: "code code-css" instead of "code highlight-css".
Owner
|
Thank you! Releasing this out as a bugfix now. |
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I recently upgraded a project from 3rd party syntax highlight filter to
HTML::Pipeline::SyntaxHighlightFilter. Found the syntax highlight is not working anymore (missinghighlightclass frompreelement. Fixed in dc42b12.Hence opened this Pull Request☺️
Please let me know if the commit message does not explain well.