User Agent style for href hyperlinks and focusable elements

[fred-wang]

cc @rwlbuis, @bkardell, @emilio

In 4f34194, I updated a bit the paragraph for href. The suggested style is:

:any-link {
  color: blue;
  text-decoration: none;
}

Chromium's one is:

:any-link {
    color: -webkit-link;
    cursor: pointer;
}

:any-link:active {
    color: -webkit-activelink
}

:-internal-spatial-navigation-interest {
    outline: auto 1px -webkit-focus-ring-color;
    box-shadow: none !important
}

:focus {
    outline: auto 1px -webkit-focus-ring-color
}

WebKit's one is

:any-link {
  color: -webkit-link;
  cursor: auto;
}
:any-link:active {
  color: -webkit-activelink;
}
:focus {
  outline: auto 5px -webkit-focus-ring-color
}

 
Firefox's one is:

:any-link {
    text-decoration: none !important;
 }

We need consistent style.

[fred-wang]

MathML elements with tabIndex are also focusable and it would be good to have style for :focus too.

[fred-wang]

I'm adding this one to Gecko (copied from svg):

*:-moz-focusring {
  /* Don't specify the outline-color, we should always use initial value. */
  outline: 1px dotted;
}

[bkardell]

We need consistent style.

Do we? Is this true of links in general in the UA sheets?

[fred-wang]

We need consistent style.

Do we? Is this true of links in general in the UA sheets?

I don't think this is true in general. But would be nice to make things more consistent if possible :-)

[NSoiffer]

If they differ between browsers, should we be consistent with the browser's styling?

[fred-wang]

there was no clear consensus, but likely we won't have interoperable for now. would be good to check what html and svg do.

regarding link in math, Murray said office only makes the link blue, without underline

[NSoiffer]

At the meeting today, we checked and SVG says very little in their stylesheet about links, definitely not colors. It was also noted that this issue is basically irrelevant now since Level 1 won't likely have links, although focusable elements might be relevant. Brian thought that some tests about that might be relevant.

[fred-wang]

@bkardell So can we go ahead and remove the href attribute and all related link stuff from the current spec?

[bkardell]

It would be great if we could fork a draft L2 first, but yes.

[fred-wang]

@bkardell OK, I'll do that tomorrow. My plan was to open a PR to the mathml-core repo like I did for other things removed, so we still have the original text available somewhere.

[NSoiffer]

As per the core meeting today, I'm removing the 'need resolution' and other labels and adding 'level 2'. It looks like the spec is up to date.