CSS Compressor: Issue compressing complex calcs

[melloware]

original Issue: yui/yuicompressor#330

Raw:

right: calc(((100% - 1200px) / 2) + 16px);

Incorrectly compressed to:

right: calc(((100% - 1200px) / 2)+16px);

No space in the +16px

[melloware]

OK because java REGEX doesn't support balancing groups or recursion this is almost impossible to do with the current REGEXES. It would need to use real parsing to find matching parens.

https://stackoverflow.com/a/35271017/502366

Here is a Regex 101. showing the current issue: https://regex101.com/r/N2rr2m/1

[jepsar]

Not bulletproof, but what about calc\([^;]+; (untested.. I'm on my phone)

[melloware]

OK this one seems to work after testing yours calc\([^;]*\) and tweaking! All unit tests passing.