Add FontAwesome support

[asciidoctor]

Add FontAwesome support

[breskeby]

Hey Dan, any update on this issue? or is there a workaround we can use manually atm?

[cmoulliard]

The slim reveal backend could be updated easily to support that. Here is what I did with the revealjs backend in Hyla project :

https://github.com/cmoulliard/hyla/blob/master/lib/resources/backends/slim/revealjs/document.html.slim#L24-L28

    - if attr? :icons, 'font'
      - if attr? 'iconfont-remote'
        link rel='stylesheet' href=(attr 'iconfont-cdn', 'http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css')
      - else
        link rel='stylesheet' href=normalize_web_path("#{attr 'iconfont-name', 'font-awesome'}.css", (attr :revealjs_vendor_stylesdir, 'revealjs/lib/css/'))

And here are the attributes that I configure within the yaml config file of hyla (but they could be passed as asciidoctor parameters too

https://github.com/cmoulliard/hyla/blob/master/lib/configs/_config.yaml#L56-L62

# Use Remote resources of Font Awesome Icons (css)
iconfont-remote: true # Uncomment this line
iconfont-cdn: http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css

OR

# Use Local resource of Font-Awesome
iconfont-name: font-awesome-4.3.0

[mojavelinux]

Done in the asciidoctor-reveal.js repository asciidoctor/asciidoctor-reveal.js#25. I also fixed the HTML of admonition blocks. The icons in admonitions don't look amazing, but at least they work now :)