Set font size with css calc

[lastmjs]

This component is just great! Right now the font size can only be set through the fontsize attribute. But that attribute only takes a static value, as in it can't take something like CSS calc. I need to use that to make the text size responsive like I desire, and right now I'm hacking through shadowRoots in JavaScript to set it.

[warpech]

Seems that this could work if we change from using setFontSize method to use fontSize option of a Ace renderer.

See:

• https://github.com/ajaxorg/ace/wiki/Configuring-Ace#renderer-options
• https://ace.c9.io/#nav=api&api=editor

I am not sure why does Ace editor have this configuration in two places.