Add CSS coding convention checker

[Adi Roiban]

Like we have PEP8 it would be nice to have a similar coding convention checker for CSS.

cssutils only checks for valid property names and values and does not report formating / coding conventions changes.

I have wrote a CSS coding convention checker to be use for my projects and I was thinking that maybe you would like to have something like this in pocket-lint.

It is based on the CSS coding conventions described on this page : http://www.phpied.com/css-coding-conventions/

It includes support for both ways of opening CSS blocks:

selector,
selector2
{
    property: value;
}

selector,
selector2 {
    property: value;
}

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There are still things that could be improved but for the moment it works for me as it is.

If there is interest and feedback I could improve the code so that it can be useful for others.

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I will attach my branch to this bug.

Cheers

[Curtis Hovey (sinzui)]

Thanks for linking to a branch.

I too pondered a CSS style checker. I am not happy with CSSUtils. It is slow and emphasises historic CSS instead of preparing CSS for modern usage. The formatter that gdp uses is more rigorous with indentation:
 selector (
    property-name: value;
    }
But I neglected to move that formatter when I extracted the checking and formatting rules to pocketlint (See bug 601736).

I have proposed the branch for merging.

[Adi Roiban (adiroiban)]

I don't know what code is referred in bug #601736.

The current parser is not as nice as it should be.
I would like to have it implemented using pyparsing or a similar module.

But if at least the tests are ok, I could refactor the code more easily.

Cheers