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Re: [css-color][compat][css-text-decor] Are more variants of currentcolor needed?

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Fri, 22 Apr 2016 14:50:50 -0700
Message-ID: <CAAWBYDDxS68D1cXA7XNMeZbaGV_=J3CJFAd9WVXsfdsX_x+muw@mail.gmail.com>
To: "L. David Baron" <dbaron@dbaron.org>
Cc: www-style list <www-style@w3.org>
On Fri, Apr 22, 2016 at 1:48 PM, L. David Baron <dbaron@dbaron.org> wrote:
> So the spec for the currentcolor:
> https://drafts.csswg.org/css-color-4/#currentcolor-color
> says that currentcolor represents the value of the 'color' property.
>
> The text-emphasis-color and text-decoration-color properties:
> https://drafts.csswg.org/css-text-decor-3/#propdef-text-emphasis-color
> https://drafts.csswg.org/css-text-decor-3/#propdef-text-decoration-color
> use currentcolor as their initial value.
>
> However, the compat spec introduces a -webkit-text-fill-color
> property that overrides the color of text:
> https://compat.spec.whatwg.org/#the-webkit-text-fill-color
> which has proven to be needed for compatibily.  I believe Edge has
> implemented it, and Gecko has an implementation and is working on
> implementing the full set of changes needed to ship that
> implementation.
>
> In Chromium (and I presume WebKit, although I didn't test), the
> -webkit-text-fill-color property also influences the color of
> text-decorations.  See this test:
> http://dbaron.org/css/test/2016/currentcolor
>
> I presume that it should also influence the color of text-emphasis,
> although neither Chromium nor Edge appears to implement
> text-emphasis, and the patches to Gecko so far haven't done this
> (although I think they should).
>
> How should this be handled?  I see a few options:
>
>  (1) Say that the 'currentcolor' value has different meaning for
>  text-decoration-color and text-emphasis-color, and for those
>  properties uses '-webkit-text-fill-color' instead of 'color'.
>
>  (2) Introduce a new value, such as 'current-text-color' or
>  'current-text-fill-color' (maybe without hyphens‽) that is the
>  initial value of 'text-decoration-color' and 'text-emphasis-color'.
>
> Again, I wrote a few tests for this at:
> http://dbaron.org/css/test/2016/currentcolor
> although I think more could probably be added.

Surely there's a (3) See if WK/Blink can change their behavior to make
text-decorations follow 'color' by default rather than
'text-fill-color'?

~TJ
Received on Friday, 22 April 2016 21:51:37 UTC

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