[webkit-dev] Remove support for -webkit-auto as a specifiable value for CSS text-align property?

[Maciej Stachowiak]

Our recent practice and policy has been that the person asking for removal has to present information to show that it's likely safe.For example by gathering usage statistics.  See: <https://trac.webkit.org/wiki/DeprecatingFeatures>

Note that 'text-align: -webkit-auto' can have an effect even if it behaves identically to the initial value of 'start'; authors might use it to reset when the text-align value has been set to something else, and I believe this would not work if '-webkit-auto' was an unknown value. On the other hand, it is possible that there's some sites that use the value but would still work fine. Gathering data on usage frequency might still be a good first step.

Regards,
Maciej

On Oct 2, 2012, at 8:59 AM, Glenn Adams <glenn at skynav.com> wrote:

> 
> On Tue, Oct 2, 2012 at 11:06 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
> We can't. There are web contents that depend on this value. Also, -webkit-auto behaves slightly differently from start (it may well as be a bug).
> 
> I wonder if it is possible to quantify this potential dependency. Features in WK have been deprecated and removed before, so this would not be a precedent. Certainly this usage is not a matter for Web interoperability, e.g., see http://www.browsersupport.net/CSS/text-align%3A-webkit-auto.
> 
> Is WK destined to support -webkit-* syntactic features forever? Given the recent renewed interest in the CSS WG to unprefix certain features (with the recommendation that prefixed features be removed at time of unprefixing), how will WK accommodate this recommendation going forward?
> 
> In any case, I will further investigate the possible issue of -webkit-auto not behaving as start. Also, I would think that, if this possible difference is eliminated, then we should be able to at least remove the use of -webkit-auto in html.css, etc.
>  
> On Tue, Oct 2, 2012 at 1:44 AM, Glenn Adams <glenn at skynav.com> wrote:
> Now that the initial value returned for text-align is 'start' instead of '-webkit-auto' (see [1]), would there be any objection to removing support for the ability to specify -webkit-auto as a legacy synonym for 'start'? If not, I will proceed with a new bug I just filed [2] to do this. Otherwise, I'll move it to RESOLVED LATER.
> 
> [1] https://bugs.webkit.org/show_bug.cgi?id=79914
> [2] https://bugs.webkit.org/show_bug.cgi?id=98126
> 
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