Extra color functions

[iflan]

trafficstars

Originally reported on Google Code with ID 9

Hi,

Some color functions are missing in closure stylesheets. If I take less in example,
here are some interesting functions http://lesscss.org/#-color-functions

Based on the last commit (http://code.google.com/p/closure-stylesheets/source/detail?r=6edc1c4364256f20dca2b59eddc18e38f1a41935)
I've implemented some of them :
* lighten(color, amount)
* darken(color, amount)
* saturate(color, amount)
* desaturate(color, amount)
* grayscale(color)

I join a patch which add functions. It's just a "quick and dirty" patch (based on the
code of addHsbToCssColor), but it seems to work.
In the hope you find it interesting.

++
Yves

Reported by Yves.Brissaud on 2011-12-02 12:25:33

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- _Attachment: [extra_colors.patch](https://storage.googleapis.com/google-code-attachments/closure-stylesheets/issue-9/comment-0/extra_colors.patch)_

[iflan]

Could you please upload this to codereview.appspot.com? Things are not configured to
ingest contributions yet, but I will try my best.

In general, it would be easiest to follow the instructions on http://code.google.com/p/closure-compiler/wiki/Contributors,
though http://code.google.com/p/closure-library/wiki/Contributors has more detailed
instructions for using codereview.appspot.com.

Reported by [email protected] on 2011-12-02 22:15:12

[iflan]

Reported by [email protected] on 2011-12-02 22:15:41

• Labels added: Type-Enhancement
• Labels removed: Type-Defect

[iflan]

OK. I'll clean a little the code (it's a little dirty and I've idea to do it better)
and when it's good I'll upload on codereview. I think it will be available in the next
days.

Reported by Yves.Brissaud on 2011-12-06 09:00:53

[iflan]

Here is the patch uploaded to codereview : http://codereview.appspot.com/5468048/

I've update many things from the first patch (linked to this issue). Essentially by
adding some HSL functions (Luminance is used to have a lighter / darker color).
Some tests has been written and the issue contains a little test case to see the usage
of those functions.

Hope this can be usefull

Reported by Yves.Brissaud on 2011-12-08 20:14:00

[iflan]

@eunomie, I believe that this was your original issue and patch. If you're still interested, can you make a pull request with the updated patch? Yes, I know, it's been nearly 4 years, so if you don't care to, I completely understand. Just say so and I'll close out this bug.

[eunomie]

Thanks for reporting my old issue :-)

See #66 for the PR.