[webkit-dev] Feature Announcement: CSS Variables (behind ENABLE_CSS_VARIABLES flag)

[Luke Macpherson]

Per http://www.webkit.org/coding/adding-features.html

I'm working on adding CSS Variable support to WebKit.
You can see the specification here: http://www.w3.org/TR/css-variables/
The patch implements a -webkit prefixed syntax of that defined by that spec.

The WIP patches can be found here:
https://bugs.webkit.org/show_bug.cgi?id=85580
and will be split up into smaller chunks for landing.

It is currently behind the ENABLE_CSS_VARIABLES flag, and there should
be no impact with that flag disabled (by default) as the code is
#ifdef-ed out.
With the flag enabled the overheads are the addition of a pointer to
RenderStyle, and applying variables in the appropriate order in
StyleResolver.

Tests can be found under fast/css/variables. These provide some good
examples of usage and are skipped by run-webkit-tests when variables
were not enabled at build.

Please Let me know if I can answer any questions,
Luke