Add export of syntax highlighted code

ryanmartinneutrino commented 6 years ago

Feature Scope

[x] Accessibility and inclusivity
[ ] User interface (content creation)
[ ] User interface (network home page & catalog)
[ ] User interface (reading)
[x] Import/export formats
[ ] Authoring tools
[ ] Book themes
[ ] Integration with third-party services

Feature Description

Wordpress has numerous plugins that allow code contained within a pre tag to be syntax highlighted. These work well in pressbooks for online version of books, however, they do not work in the exports. It would be great to implement/modify a plugin that would allow syntax highlighting to show up in exported books.

Feature Use Case

Any book that includes coding examples would benefit from this.

Other Notes

dac514 commented 6 years ago

I found this library: https://github.com/scrivo/highlight.php

Highlight.PHP works like https://highlightjs.org/ but instead of rendering using JavaScript in the web browser for online version of books, Pressbooks could render code as plain HTML then apply CSS. This should make code syntax highlighting work in Epubs and PDFs.

SteelWagstaff commented 4 years ago

See https://github.com/pressbooks/ideas/issues/248

SteelWagstaff commented 4 years ago

Looks like Prince already supports Lea Verou's Prism.js library: https://prismjs.com/. See https://www.princexml.com/forum/topic/2510/prism.js-highlighter-support + https://www.princexml.com/forum/topic/2242/js-generated-syntax-highlighting-doesnt-show-up-in-pdf. Add'l reference doc for working wtih JS in Prince: https://www.princexml.com/doc/javascript/ + https://www.princexml.com/doc/prince-input/#applying-javascript-in-prince

pressbooks / ideas