CSS refactor

[tdewolff]

This refactors how CSS minifies its values for properties. All complex declarations are ignored (ie. containing blocks or is not a list of values separated by WS or comma). It is now possible to more easily inspect all values of a property so that more complex minification rules can be made in the future (think about shorthand declaration such as border, outline, background, font, etc). This fixes #175 and #176

PS: performance does not change significantly

[pieterclaerhout]

Any ideas when this will be merged and become available? We're actually waiting for this to use in one of our apps where we were running into this bug...

[tdewolff]

Working on it now, I need to gain confidence by testing it on a test set.

Current regressions: values within functions are not minified by default. rgba( for example will be minified, but not within linear-gradient(, because the latter has not been implemented. Non-exhaustive list of unsupported functions:

• linear-gradient + vendors
• calc
• transform specific functions:
• • scale + variations
• • perspective
• • translate + variations
• • rotate + variations

Bugs:

• import url(//example.com) becomes import //example.com, but should have quotes surrounded

[tdewolff]

The regressions in minification will be fixed soon, @pieterclaerhout merging now!